阅读说明：本技术 工程机械 (Engineering machinery ) 是由 姜秉一 于 2018-04-18 设计创作，主要内容包括：本发明的实施例涉及一种工程机械。所述工程机械包括：旋回电机,其从所述主泵接收工作油来进行动作；旋回阀,其控制来自所述主泵的工作油的流动而供应至所述旋回电机,并控制从所述旋回电机排出的工作油的流动；工作油控制阀部,其设置于所述旋回电机与所述旋回阀之间并根据两端的工作油的压力来控制工作油的流动；第一蓄能器,其在所述旋回电机减速时储存通过了所述工作油控制阀部的工作油；以及再生控制阀,其设置于所述工作油控制阀部与所述第一蓄能器之间。(The embodiment of the present invention is related to a kind of engineering machinery.The engineering machinery includes: cycle motor, receives working oil from the main pump to be acted；Cycle valve controls the flowing of the working oil from the main pump and is supplied to the cycle motor, and controls the flowing for the working oil being discharged from the cycle motor；Work oil control valve portion, is set between the cycle motor and the cycle valve and controls according to the pressure of the working oil at both ends the flowing of working oil；First accumulator, in the cycle decelerating through motor, storage has passed through the working oil in work oil control valve portion；And regeneration control valve, it is set between work oil control valve portion and first accumulator.)

1. a kind of engineering machinery characterized by comprising

Main pump；

Cycle motor receives working oil from the main pump to be acted；

Cycle valve controls the flowing of the working oil from the main pump and is supplied to the cycle motor, and controls from described The flowing of the working oil of cycle motor discharge；

Work oil control valve portion, is set to the pressure of the working oil between the cycle motor and the cycle valve and according to both ends Power controls the flowing of working oil；

First accumulator, in the cycle decelerating through motor, storage has passed through the working oil in work oil control valve portion；

Regeneration control valve is set between work oil control valve portion and first accumulator；And

Control unit judges the acceleration or deceleration of the cycle motor to control work oil control valve portion and regeneration control Valve processed.

2. engineering machinery according to claim 1, which is characterized in that further include:

First pressure detection part is set between the cycle motor and the cycle valve and detects to the cycle motor The pressure of the working oil of inflow；And

Second pressure detection part detects the pressure being discharged from the cycle motor.

3. engineering machinery according to claim 2, which is characterized in that further include:

Operation portion is operated by operator, and adjusts direction of rotation and the rotation speed of the cycle motor,

Pressure detected by operation direction of the control unit based on the operation portion, the first pressure detection part, with And pressure detected by the second pressure detection part judges the acceleration or deceleration of the cycle motor.

4. engineering machinery according to claim 3, which is characterized in that further include:

First segment discharge orifice is set between the second pressure detection part and the cycle valve, and passes through for working oil；With And

Third pressure detecting part is set between the first segment discharge orifice and the cycle valve.

5. engineering machinery according to claim 4, which is characterized in that

The control unit is based on working oil detected by the second pressure detection part and the third pressure detecting part Pressure and the area of the first segment discharge orifice set carry out the flow of cycle motor described in operation.

6. engineering machinery according to claim 5, which is characterized in that further include:

Pressure store detection part, detection are stored in the pressure of the working oil of first accumulator.

7. engineering machinery according to claim 6, which is characterized in that

Work oil control valve portion includes:

Working oil switches valve member, according to the pressure for the working oil being discharged from the cycle motor and is supplied to the cycle electricity The pressure of the working oil of machine and be selectively switched；And

First working oil is opened and closed valve member, switches valve member according to being discharged from the cycle motor and passing through the working oil The pressure of working oil is selectively supplied working oil to first accumulator or the cycle valve.

8. engineering machinery according to claim 7, which is characterized in that

The area of flow and the cycle valve that has set of the control unit based on the cycle motor calculated is come operation The outlet pressure of the cycle motor, and the outlet pressure based on the cycle motor calculated and first accumulator The difference of pressure controls the regeneration control valve.

9. engineering machinery according to claim 8, which is characterized in that

When the outlet pressure of the cycle motor calculated is higher than the pressure of first accumulator, the control unit is closed First working oil is opened and closed valve member, and regeneration control valve control is electric for that can be equivalent to the cycle calculated The pressure loss of the pressure difference of the working oil of the outlet pressure of machine and first accumulator.

10. engineering machinery according to claim 8, which is characterized in that

When the outlet pressure of the cycle motor calculated is less than the pressure of first accumulator, the control unit is by institute It states the first working oil opening and closing valve member or the second working oil open and close valve component controls is the work for making to be discharged from the cycle motor Oil is mobile to the cycle valve.

11. engineering machinery according to claim 1, which is characterized in that further include:

Second accumulator can store the working oil for having passed through work oil control valve portion when the cycle motor accelerates.

12. a kind of engineering machinery characterized by comprising

Main pump；

Cycle motor receives working oil from the main pump to be acted；

Cycle valve controls the flowing of the working oil from the main pump and is supplied to the cycle motor, and controls from described The flowing of the working oil of cycle motor discharge；

Work oil control valve portion, is set to the pressure of the working oil between the cycle motor and the cycle valve and according to both ends Power controls the flowing of working oil；

Traffic detection function is set between the cycle motor and work oil control valve portion；

First accumulator, in the cycle decelerating through motor, storage has passed through the working oil in work oil control valve portion；

Regeneration control valve is set between work oil control valve portion and first accumulator；And

Control unit is transported based on the area of the flow of working oil detected by the traffic detection function and the cycle valve The outlet pressure of the cycle motor is calculated, and outlet pressure and first accumulator based on the cycle motor calculated The difference of pressure control the regeneration control valve.

Technical field

The embodiment of the present invention is related to a kind of engineering machinery, and more specifically, the used of cycle body can be stored by being related to one kind Engineering machinery of the performance to be utilized.

Background technique

In general, engineering machinery includes driving body and the cycle body that can be traveling body support and rotation.Driving body is used for work The movement of journey machinery may include unlimited track or wheel portion.In addition, cycle body is set to the top of driving body, and in cycle body It is provided with and enables a driver to take a seat and the cabin of opertions engineering machinery.In addition, driver is operated by making the rotation of cycle body It is set to the power tool of scraper bowl of cycle body etc, and utilizing works machinery executes the operation of digging etc.

As illustrated in Fig. 1 and Fig. 2, in the cycle deceleration interval of engineering machinery, the pressure of operation portion is not controlled as O, But it is controlled as maintaining the pressure of regulation level.Specifically, Fig. 2 shows the pressure of the cycle operation portion of operation portion 310, cycle The face of speed, the pressure A of the discharge side of the pressure B of the inflow side of cycle motor 200, cycle motor 200 and cycle valve 300 Product variation.

When cycle body slows down, operator operates operation portion 310 (joystick), and cycle valve 300 is not made to be in neutrality, but Continue to implement control (arrow A).At this point, the pressure of operation portion 310 not instead of 0, is controlled as regulation level.In addition, if by Cycle motor 200 be discharged flow reach releasing stress for cycle motor, then cycle safety valve 110 and check-valves be opened and again The secondary suction side to cycle motor 200 is supplied.That is, being equivalent to the stream of the excretion flow of cycle motor 200 from cabinet supplement Amount.In addition, being supplied from main pump 100 and from the working oil that cycle motor 200 is discharged by being discharged to cabinet after cycle valve 300.

In addition, in cycle deceleration interval, when operating operation portion 310 to select the excavation position of engineering machinery, In In the case that turning speed is sufficiently slowed down, the flow for the working oil being discharged by cycle motor 200 is the state to tail off, therefore, When the slide valve flow path of cycle valve 300 is insufficient small, the pressure that cycle motor 200 when cycle is slowed down occurs is lower than cycle safety valve The case where 110 pressure (arrow C).

Summary of the invention

Technical task

The embodiment of the present invention provide it is a kind of can store generated when cycle body being made to slow down or accelerate by cycle motor row Working oil out, to utilize the engineering machinery of energy possessed by the working oil.

Technical solution

According to an embodiment of the invention, engineering machinery includes: main pump；Cycle motor receives working oil from the main pump To be acted；Cycle valve controls the flowing of the working oil from the main pump and is supplied to the cycle motor, and controls The flowing for the working oil being discharged from the cycle motor；Work oil control valve portion, is set to the cycle motor and the rotation Return the flowing that working oil is controlled between valve and according to the pressure of the working oil at both ends；First accumulator, in the cycle electricity Storage has passed through the working oil in the work oil control valve portion when machine slows down；Regeneration control valve is set to the working oil control Between valve portion processed and first accumulator；And control unit, judge the acceleration or deceleration of the cycle motor to control State work oil control valve portion and the regeneration control valve.

In addition, above-mentioned engineering machinery can also include: first pressure detection part, it is set to the cycle motor and institute State between cycle valve and detect the pressure of the working oil flowed into the cycle motor；And second pressure detection part, inspection Survey the pressure for the working oil being discharged from the cycle motor.

In addition, above-mentioned engineering machinery further include: operation portion is operated by operator, and adjusts the rotation of the cycle motor Turn direction and rotation speed, the control unit can operation direction based on the operation portion, the first pressure detection part Pressure detected by detected pressure and the second pressure detection part judges the acceleration of the cycle motor Or slow down.

In addition, above-mentioned engineering machinery can also include: first segment discharge orifice, be set to the second pressure detection part with Between the cycle valve, and pass through for working oil；And third pressure detecting part, detection have passed through the first segment discharge orifice Working oil pressure.

In addition, the control unit can be examined based on the second pressure detection part and the third pressure detecting part The area of the pressure for the working oil measured and the first segment discharge orifice set carrys out the flow of cycle motor described in operation.

In addition, above-mentioned engineering machinery can also include: pressure store detection part, detection is stored in first accumulation of energy The pressure of the working oil of device.

In addition, work oil control valve portion may include: working oil switching valve member, according to from the cycle motor The pressure of the working oil of discharge and supplied to the working oil of the cycle motor pressure and be selectively switched；And first Working oil is opened and closed valve member, according to the working oil that the working oil switching valve member is discharged and passed through from the cycle motor Pressure is selectively supplied working oil to first accumulator or the cycle valve.In addition, above-mentioned engineering machinery is also It may include: regeneration control valve, guidance has passed through the working oil of working oil switching valve member to first accumulator It is mobile.

In addition, the control unit can flow based on the cycle motor calculated and the cycle valve that has set Area carry out the outlet pressure of cycle motor described in operation, and the outlet pressure based on the cycle motor calculated and described The difference of the pressure of first accumulator controls the regeneration control valve.

In addition, when the outlet pressure of the cycle motor calculated is higher than the pressure of first accumulator, it is described Control unit can close the first working oil opening and closing valve member, and be that can be equivalent to operation by regeneration control valve control The pressure loss of the pressure difference of the working oil of the outlet pressure and first accumulator of the cycle motor out.

In addition, when the outlet pressure of the cycle motor calculated is less than the pressure of first accumulator, it is described First working oil can be opened and closed valve member by control unit or the second working oil open and close valve component controls are makes from the cycle The working oil of motor discharge is mobile to the cycle valve.

In addition, above-mentioned engineering machinery can also include: the second accumulator, can be stored when the cycle motor accelerates The working oil in work oil control valve portion is passed through.

Alternatively, the engineering machinery of another embodiment of the present invention includes: main pump；Cycle motor is received from the main pump Working oil is acted；Cycle valve controls the flowing of the working oil from the main pump and is supplied to the cycle motor, And control the flowing for the working oil being discharged from the cycle motor；Work oil control valve portion, be set to the cycle motor with The flowing of working oil is controlled between the cycle valve and according to the pressure of the working oil at both ends；Traffic detection function, setting Between the cycle motor and work oil control valve portion；First accumulator is stored in the cycle decelerating through motor The working oil in work oil control valve portion is passed through；Regeneration control valve, be set to work oil control valve portion with it is described Between first accumulator；And control unit, flow based on working oil detected by the traffic detection function and described The area of cycle valve calculates the outlet pressure P of the cycle motor_e, and the outlet pressure based on the cycle motor calculated Power P_eThe regeneration control valve is controlled with the difference of the pressure of first accumulator.

The effect of invention

According to an embodiment of the invention, engineering machinery can store when cycle body slows down or accelerates from the discharge of cycle motor Working oil, to effectively utilize energy possessed by working oil.

Detailed description of the invention

Fig. 1 is the figure for showing previous engineering machinery.

Fig. 2 shows the working conditions of Fig. 1.

Fig. 3 is the figure for showing the engineering machinery of one embodiment of the invention.

Fig. 4 shows the table for judging the action state of cycle motor of the control unit of one embodiment of the invention.

The figure of state when Fig. 5 is the cycle body acceleration for showing Fig. 3.

The figure of state when Fig. 6 is the cycle body deceleration for showing one embodiment of the invention.

Fig. 7 is the figure for showing the engineering machinery of another embodiment of the present invention.

Specific embodiment

Below with reference to the accompanying drawings the embodiment of the present invention is described in detail, so as to one in the technical field of the invention As technical staff can be easy to implement.The present invention may be implemented as various ways, however it is not limited to described herein Embodiment.

It should be pointed out that attached drawing is schematically, to be not drawn to illustrate.For the clearness and convenience in figure, The relative size and ratio of part as shown in the figure are exaggerated or are reduced and illustrated in size, and arbitrary dimension is only exemplary , without being restrictive.In addition, using the identical works element or component appeared in more than two figures identical Reference marks, to embody similar feature.

The embodiment of the present invention is specifically illustrated in ideal embodiment of the invention.As a result, it is envisioned that graphic more The deformation of sample.Therefore, embodiment is not limited to the ad hoc fashion in illustrated region, for example, also including mode caused by manufacturing Deformation.

It is illustrated referring to engineering machinery 101 of the Fig. 3 to Fig. 5 to one embodiment of the invention.

As illustrated in fig. 3, the engineering machinery 101 of one embodiment of the invention includes main pump 100, cycle motor 200, cycle Valve 300, work oil control valve portion 500, the first accumulator 610 and control unit 950.

Main pump 100 receives oil from cabinet, and has been shaped to pressure so as to driving device to oil application pressure next life Working oil.That is, main pump 100 makes the oil provided from cabinet can have the energy for capableing of driving device.

Cycle motor 200 receives working oil from main pump 100 to be acted.Specifically, cycle motor 200 makes to be set to work The cycle body on the driving body top of journey machinery 101 is able to carry out turning motion.

Cycle valve 300 controls the flowing of the working oil from main pump 100 and is supplied to cycle motor 200.Specifically, cycle Valve 300 is set between main pump 100 and cycle motor 200, and the working oil supplied from main pump 100 is made to be provided to cycle motor 200, and the working oil for having passed through cycle motor 200 is made to be discharged to cabinet.

Work oil control valve portion 500 controls the stream of working oil according to the pressure for the working oil being discharged by cycle motor 200 It is dynamic.Specifically, work oil control valve portion 500 can be according to the working oil flowed into cycle motor 200 and from 200 row of cycle motor The pressure of working oil out and be switched.

That is, work oil control valve portion 500 is according to the pressure of the working oil flowed into cycle motor 200 and from cycle motor 200 discharge working oils pressure and be switched to control the flowing for the working oil being discharged by cycle motor 200.Alternatively, work Oil control valve portion 500 can be so that the working oil being discharged by cycle motor 200 can be discharged to cabinet by cycle valve 300 Mode controls the flowing of working oil.

First accumulator 610 can store the work for having passed through work oil control valve portion 500 when cycle motor 200 slows down Oil.That is, work oil control valve portion 500 can make the working oil for having passed through cycle motor 200 be provided to the first accumulator 610.

Regeneration control valve 900 is set between work oil control valve portion 500 and the first accumulator 610.Specifically, regeneration control Valve 900 processed can be set in the front of the first accumulator 610.In addition, regeneration control valve 900 can be guided in cycle motor 200 The working oil for having passed through working oil switching valve member 530 when deceleration can be stored in the first accumulator 610.To this The working oil that the engineering machinery 101 of one embodiment of invention is discharged when cycle motor 200 can slow down from cycle motor 200 stores up It is stored in the first accumulator 610.

Control unit 950 judges the acceleration or deceleration of cycle motor 200 to control work oil control valve portion 500 and Regeneration control Valve 900.Specifically, control unit 950 can direction of rotation information based on the selected cycle motor 200 of current work person, when The preceding pressure flowed into cycle motor 200 and the pressure being discharged from cycle motor 200 simultaneously are compared to differentiate cycle motor 200 deceleration regime or the acceleration mode of cycle motor 200.

In addition, the engineering machinery 101 of one embodiment of the invention can also include the second accumulator 620.

Second accumulator 620 can supply stored working oil when cycle motor 200 slows down to cycle motor 200. Specifically, when cycle motor 200 slows down, the second accumulator 620 is stored in first in the working oil for having passed through cycle motor 200 The working oil of the second accumulator 620 is stored in a period of accumulator 610 to the supply of the inflow side of cycle motor 200, is thus prevented The cavitation (cavitation) of the inflow side of spin-ended telegram in reply machine 200.That is, due to electric by cycle when cycle motor 200 slows down The working oil that machine 200 is discharged is stored in the first accumulator 610, in a period of cycle motor 200 rotates, not to cycle motor Working oil is supplied in 200 inflow side, accordingly, it is possible to which cavitation (cavitation) occurs in the inflow side of cycle motor 200.

To when cycle motor 200 slows down, when the working oil for having passed through cycle motor 200 is stored in the first accumulator When 610, the second accumulator 620 can be supplied to the inflow side of cycle motor 200 from cycle motor when cycle motor 200 accelerates 200 discharges and the working oil that is stored, it is thus possible to prevent that cavitation occurs in the inflow side of cycle motor 200.

That is, when cycle motor 200 slows down, when the working oil for having passed through cycle motor 200 is stored in the first accumulator 610 When, the working oil for being stored in the second accumulator 620 can be supplied to cycle motor 200 when cycle motor 200 accelerates, at this point, The cavitation occurred by the underfed for the inflow side for being supplied to cycle motor 200 can be effectively prevented.

In addition, the second accumulator 620 of the engineering machinery 101 of one embodiment of the invention can add in cycle motor 200 Storage has passed through the working oil of cycle motor 200 when fast.Specifically, the second accumulator 620 can be when cycle motor 200 accelerates Storage has passed through the working oil in work oil control valve portion 500.That is, work oil control valve portion 500 can when cycle motor 200 accelerates So that the working oil for having passed through cycle motor 200 is provided to the second accumulator 620.

To which engineering machinery 101 can store up the working oil of cycle motor 200 when cycle motor 200 slows down or accelerates It is stored in the first accumulator 610 or the second accumulator 620, to be utilized.

In addition, the engineering machinery 101 of one embodiment of the invention can also include first pressure detection part 412 and second Pressure detecting part 411.In addition, first pressure detection part 412 and second pressure detection part 411 can detecte to cycle electricity The pressure of the pressure for the working oil that machine 200 flows into and the working oil being discharged from cycle motor 200.Specifically, first pressure detects Component 412 and second pressure detection part 411 can be set between cycle motor 200 and work oil control valve portion 500.

For example, as shown in figure 3, first pressure detection part 412 can detecte to cycle when cycle 200 cycle of motor The pressure for the working oil that motor 200 flows into.Specifically, before first pressure detection part 412 can be configured at cycle motor 200 The hydraulic line of side, and detect the pressure of the working oil flowed into cycle motor 200.

Second pressure detection part 411 can detecte the pressure for the working oil being discharged from cycle motor 200.Specifically, Two pressure detecting parts 411 can be configured at the hydraulic line at the rear of cycle motor 200, and detect from 200 row of cycle motor The pressure of working oil out.

The front or behind of above-mentioned cycle motor 200 is come on the basis of the flow direction supplied to the working oil of cycle motor 200 Definition.

In addition, the engineering machinery 101 of one embodiment of the invention can also include operation portion 310.

Operation portion 310 can operate and control direction of rotation and the rotation speed of cycle motor 200 by operator.Specifically Ground operates the direction of operation portion 310 (joystick) operator's property of can choose to determine the rotation side of cycle motor 200 To.In addition, operator's property of can choose operate the operating quantity of operation portion 310 to control the acceleration or deceleration of cycle motor 200 Speed.

Control unit 950 can receive the information of the operation portion 310 operated by operator.In addition, control unit 950 can be based on Pressure detected by the information of operation portion 310, first pressure detection part 412 and second pressure detection part 411 are examined The pressure measured judges the acceleration or deceleration of cycle motor 200.Specifically, control unit 950 can be by the information of operation portion 310 Direction of rotation information based on the selected cycle motor 200 of current work person, when the preceding pressure flowed into cycle motor 200 and From cycle motor 200 be discharged pressure and be compared to differentiate cycle motor 200 deceleration regime or cycle motor 200 plus Fast state.

As an example, as illustrated in fig. 3, first pressure detection part 412 can be configured at the right side of cycle motor 200, Second pressure detection part 411 can be configured at the left side of cycle motor 200.At this point, when the operation portion as operated by operator 310 by the direction of rotation of cycle motor 200 be selected as right side when, if pressure R2 detected by first pressure detection part 412 Higher than pressure L2 detected by second pressure detection part 411, then cycle motor 200 can be judged as by control unit 950 adds Fast state.

In addition, as illustrated in Fig. 3 and Fig. 4, when the pressure signal by operation portion 310 operated by operator is electric by cycle When the direction of rotation of machine 200 is selected as right side, if pressure L2 detected by second pressure detection part 411 is higher than first pressure Pressure R2 detected by component 412, then cycle motor 200 can be judged as deceleration regime by control unit 950.

Fig. 3 and Fig. 4 show cycle motor 200 direction of rotation, by operator input operation portion 310 signal and To the inflow of cycle motor 200 or the difference for the pressure being discharged from cycle motor 200.That is, control unit 950 can be selected according to by operator The information for the operation portion 310 selected is to pressure R2 detected by first pressure detection part 421 and second pressure detection part 411 The size of detected pressure R1 is compared to differentiate the acceleration or deceleration state of cycle motor 200.

In addition, the engineering machinery 101 of one embodiment of the invention can also include that first segment discharge orifice 431 and third pressure are examined Survey component 421.

First segment discharge orifice 431 can be passed through by the working oil that first pressure detection part 412 detects pressure.Specifically, One throttle orifice 431 can be set on the hydraulic line at the rear of cycle motor 200.That is, second pressure detection part 411 can be with Detect from cycle motor 200 be discharged and to first segment discharge orifice 431 flow into working oil pressure.

Third pressure detecting part 421 can detecte the pressure for having passed through the working oil of first segment discharge orifice 431.That is, third Pressure detecting part 421 can detecte the pressure that the working oil of first segment discharge orifice 431 is discharged and passed through from cycle motor 200.

In addition, the control unit 950 of the engineering machinery 101 of one embodiment of the invention can be with the stream of operation cycle motor 200 Amount.Specifically, the flow Q for the working oil that control unit 950 can be discharged with operation from cycle motor 200.

Control unit 950 can based on detected by second pressure detection part 411 by first segment discharge orifice 431 before The pressure information that is discharged from cycle motor 200 has passed through first segment discharge orifice 431 detected by third pressure detecting part 421 The area of the pressure information of working oil later and the first segment discharge orifice 431 set carrys out operation and is discharged from cycle motor 200 Cycle motor flow Q.Specifically, when cycle is slowed down, control unit 950 can be with -1 come operation of mathematical expression based on following from rotation The flow Q for the cycle motor that telegram in reply machine 200 is discharged.

[mathematical expression 1]

At this point, C_dIt is the constant for having been set to efflux coefficient.

A_oriIt is the sectional area of the throttle orifice that the working oil being discharged from cycle motor is passed through set.

Δp_oriIt indicates through the pressure before throttle orifice and passes through the pressure difference after throttle orifice.

ρ is the constant for having been set to the density of working oil.

To which without additional velocity sensor, control unit 950 can be pushed away from the flow Q of the cycle motor calculated The turning speed of settled preceding cycle body.

In addition, the engineering machinery 101 of one embodiment of the invention can also include pressure store detection part 660.

Pressure store detection part 660 can detecte the pressure for being stored in the working oil of the first accumulator 610.Specifically, Pressure store detection part 660 can detecte the pressure for being stored to the working oil of the first accumulator 610.Such pressure store Pressure information detected by detection part 660 can be passed to control unit 950.

In addition, the work oil control valve portion 500 of the engineering machinery 101 of one embodiment of the invention may include that working oil is cut Change valve member 530 and the first working oil opening and closing valve member 510.

Working oil switching valve member 530 can be selectively switched according to the pressure being discharged from cycle motor 200.Tool Body, the side of working oil switching valve member 530 can be connect with the hydraulic line flowed into cycle motor 200, and working oil is cut The other side for changing valve member 530 can be connect with the hydraulic line being discharged from cycle motor 200.To which working oil switches valve portion Part 530 can be according to the pressure of the working oil flowed into cycle motor 200 and the pressure for the working oil being discharged from cycle motor 200 And it is selectively switched.

First working oil opening and closing valve member 510 can be configured between working oil switching valve member 530 and cycle valve 300. In addition, the first working oil opening and closing valve member 510, which can be guided, is discharged from cycle motor 200 and is passed to working oil switching valve portion The working oil of part 530 is mobile to the first accumulator 610 or cycle valve 300.

Specifically, when cycle motor 200 slows down, the first working oil opening and closing valve member 510 is started and guided by control unit 950 The working oil being discharged by cycle motor 200 is discharged to cabinet by cycle valve 300, so that the working oil is switched by working oil Valve member 530 and be provided to the first accumulator 610.

Specifically, when cycle motor 200 slows down, if the first working oil opening and closing valve member 510 is opened by control unit 950, The working oil being discharged from cycle motor 200 can be discharged to cabinet by cycle valve 300.Alternatively, if the first working oil is opened and closed Valve member 510 is closed by control unit 950, then the working oil being discharged from cycle motor 200 can be guided to pass through working oil switching valve The first accumulator 610 is provided to after component 530.

Alternatively, when cycle motor 200 accelerates, if the first working oil opening and closing valve member 510 is closed, from cycle motor The working oil of 200 discharges can be moved to the second accumulator 620 by working oil switching valve member 530 and be stored in the second storage It can device 620.

Regeneration control valve 900 can guide the work for having passed through working oil switching valve member 530 to the first accumulator 610 Oil.Specifically, regeneration control valve 900 can be configured between working oil switching valve member 530 and the first accumulator 610.In addition, Regeneration control valve 900 can be controlled as that the first accumulator can be stored according to valve member 530 is switched by working oil The pressure of 610 working oil is stored in the first accumulator 610.That is, regeneration control valve 900 can be by control unit 950 Control.

In addition, the control unit 950 of the engineering machinery 101 of one embodiment of the invention controls regeneration control valve 900.

The area of flow Q and cycle valve 300 of the control unit 950 based on the cycle motor calculated are come operation cycle motor Outlet pressure P_e.Specifically, when there is no cycle regenerative system, the valve of side valve type is used in cycle valve 300, and will be by cycle The slide valve flow path 311 that motor 200 flows to cabinet is designed as being less than the flow path that working oil is supplied from main pump 100 to cycle motor 200, To control turning speed when cycle is slowed down.The area of such slide valve flow path 311 can select cycle motor 200 according to user Direction of rotation and cycle motor 200 rotation speed etc. operation portion 310 operating quantity degree and can be changed.Therefore, according to working as The operating quantity of preceding operation portion 310 has been set in control unit 950 and have been passed through from the flow that cycle motor 200 flows to cabinet The area of slide valve flow path 311.

That is, the area of flow Q and the slide valve flow path 311 that has set of the control unit 950 based on the cycle motor calculated, root Carry out operation according to the operation in current operation portion 310 to be discharged from the working oil that current cycle motor 200 is discharged by cycle valve 300 The outlet pressure P of cycle motor when to cabinet_e。

Specifically, control unit 950 can pass through the outlet pressure P of following -2 come operation cycle motor of mathematical expression_e。

[mathematical expression 2]

At this point, ρ is the constant for having been set to the density of working oil.

C_dIt is the constant for having been set to efflux coefficient.

Q is the flow of the cycle motor being discharged from cycle motor calculated by above-mentioned mathematical expression -1.

A_ctIt is the area of the current slide valve flow path set.

In addition, control unit 950 calculates the outlet pressure P from the cycle motor calculated_eSubtract pressure store detection part The value of the pressure of the working oil of the first accumulator 610 is stored in detected by 660.That is, 950 operation cycle motor of control unit Outlet pressure P_eWith the difference of the pressure of the first accumulator 610.Specifically, control unit 950 can be with mathematical expression -3 based on following Calculate the pressure of regeneration control valve 900.

[mathematical expression 3]

P_releif=P_e-P_1accu

At this point, P_eIt is the outlet pressure of the cycle motor calculated by above-mentioned mathematical expression -2.

P_1accuIt is the pressure of the first accumulator.

That is, it is the pressure and the first accumulation of energy for making regeneration control valve 900 that control unit 950, which can control regeneration control valve 900, The pressure of device 610 is the outlet pressure P of cycle motor_e。

In addition, working as the outlet pressure P of cycle motor_eLess than the first accumulator 610 pressure when, one embodiment of the invention The control unit 950 of engineering machinery 101 first working oil can be opened and closed to the control of valve member 510 to make to have passed through working oil switching The working oil of valve member 530 is mobile to cycle valve 300.

As the outlet pressure P of cycle motor_eLess than the working oil for being stored in the first accumulator 610 pressure when, control unit 950 are judged as that the working oil being discharged from cycle motor 200 can not be stored in the first accumulator 610.At this point, control unit 950 can Valve member 510 is opened and closed with open first working oil to guide the working oil being discharged from cycle motor 200 to pass through non-first accumulator 610 cycle valve 300 is discharged to cabinet.

In addition, the engineering machinery 101 of one embodiment of the invention can also include regeneration motor 800 and accumulator valve 650.

Regeneration motor 800 can transmit power, so as to drive main pump 100.Furthermore, it is possible to using the first storage is stored in The working oil of energy device 610 regenerates motor 800 to drive.I.e., it is possible to be had using the working oil for being stored in the first accumulator 610 Energy come drive regeneration motor 800.

Accumulator valve 650 can be configured between regeneration motor 800 and the first accumulator 610.In addition, when working oil is to the When the movement of one accumulator 610 is to be stored in the first accumulator 610, accumulator valve 650 is opened.In addition, working as to generator again When 800 supplies are stored in the working oil of the first accumulator 610, accumulator valve 650 can be opened.Alternatively, ought not stored When the working oil of one accumulator 610, accumulator valve 650 can be closed, to prevent the work for being stored in the first accumulator 610 Oil is discharged by accumulator valve 650.

In addition, the working oil conversion valve member 530 of the engineering machinery 101 of one embodiment of the invention can be in cycle motor 200 supply the working oil for being stored in the second accumulator 620 to cycle motor 200 when slowing down suddenly.

Specifically, when implementing regeneration when cycle motor 200 carries out cycle deceleration, the flow that is discharged by cycle motor 200 Oil can be stored in the first accumulator 610.At this point, since cycle motor 200 rotates the inflow of Shi Buxiang cycle motor 200 Working oil is supplied in side, thus cavitation may occur in the inflow side of cycle motor 200.But when the acceleration of cycle motor 200 It can be supplied to the inflow side of cycle motor 200 and be stored in the second storage that can store the working oil being discharged from cycle motor 200 The working oil of energy device 620.To be supplied to cycle motor 200 and be stored in the second accumulator when cycle motor 200 slows down 620 working oil, and the oil for the flow being discharged from cycle motor 200 can be stored in the first accumulator 610.

In addition, the work oil control valve portion 500 of the engineering machinery 101 of one embodiment of the invention can also include the second work Make oil opening and closing valve member 520.Specifically, the second working oil opening and closing valve member 520 can be configured at working oil switching valve member 530 Between cycle valve 300.It is separated in addition, the second working oil opening and closing valve member 520 can be opened and closed valve member 510 with the first working oil Setting.It is identical that function and the first working oil that second working oil is opened and closed valve member 520 are opened and closed the function of valve member 510, but can be with It is controlled according to the direction of rotation of cycle motor 200.

In addition, the engineering machinery 101 of one embodiment of the invention can also include the 4th pressure as illustrated in Fig. 3 and Fig. 5 Detection part 422 and the second throttle orifice 432.

4th pressure detecting part 422 can be configured between working oil switching valve member 530 and cycle motor 200.Tool Body, the 4th pressure detecting part 422 can be configured at first pressure detection part 412 and working oil switching valve member 530 it Between.

Second throttle orifice 432 can be configured between first pressure detection part 412 and second pressure detection part 411. In addition, being set with the area of the second throttle orifice 432 in control unit 950.

As an example, when the direction of rotation of cycle motor 200 is right side, as illustrated in fig. 5, control unit 950 can be with base The pressure of the working oil detected by second pressure detection part 411 and third pressure detecting part 421 and set The area of one throttle orifice 431 carrys out the flow of operation cycle motor.

Alternatively, as illustrated in fig. 5, control unit 950 can be based on the when the direction of rotation of cycle motor 200 is right side The pressure R1 of working oil detected by one pressure detecting part 412 and the 4th pressure detecting part 422 and set second The area of throttle orifice 432 carrys out the flow of operation cycle motor.

That is, as illustrated in fig. 3, being provided with multiple throttle orifices, and both ends are provided with multiple pressure detectings as center Component, such setting can be in order to the moving direction according to cycle body centered on cycle motor 200 to each other not Same direction supplies working oil and detects the flow from the pressure union of working oil of the discharge of cycle motor 200 working oil.

In other words, it is based on Fig. 3, when control unit 950 receives the information for rotating cycle body to the left from operation portion 310, The work flowed into cycle motor 200 can be detected from the pressure detecting part 411 in the left side for being configured at cycle motor 200 of Fig. 3 Make the pressure of oil, and is detected by the pressure detecting part 412 on the right side for being configured at cycle motor 200 of Fig. 2 from cycle motor 20 The pressure of the working oil of discharge.At this point, detecting the first pressure detection part of the pressure of the working oil flowed into cycle motor 200 It can be the symbol 411 of Fig. 3, and the second pressure detection part for detecting the pressure for the working oil being discharged from cycle motor 200 can To be the symbol 412 of Fig. 3.

Alternatively, the engineering machinery 102 of another embodiment of the present invention includes main pump 100, cycle motor 200, cycle valve 300, work oil control valve portion 500, traffic detection function 400, the first accumulator 610, regeneration control valve 900 and control unit 950.The detailed structure other than traffic detection function 400 of the engineering machinery 102 of another embodiment of the present invention can be with It is identical as the structure of engineering machinery 101 of an embodiment of aforementioned present invention.

Specifically, the traffic detection function 400 of the engineering machinery 102 of another embodiment of the present invention is set to cycle motor Between 200 and work oil control valve portion 500.In addition, traffic detection function 400 can detecte the work being discharged from cycle motor 200 Make the flow of oil.

In addition, multiple traffic detection functions 400 can be separated from each other centered on cycle motor 200 and be set to cycle electricity Between machine 200 and work oil control valve portion 500.To which traffic detection function 400 can be with the direction of rotation of cycle motor 200 Independently detect the flow for the working oil being discharged from cycle motor 200.

That is, the control unit 950 of the engineering machinery 102 of another embodiment of the present invention can be from 400 institute of traffic detection function The flow for the working oil being discharged from cycle motor 200 is obtained in the information detected.In addition, the work of another embodiment of the present invention The control unit 950 of journey machinery 102 can calculate the outlet of cycle motor identically as the control unit 950 of above-mentioned engineering machinery 101 Pressure P_eWith the control pressure of regeneration control valve 900.

It is illustrated below based on action process of the Fig. 3 to Fig. 6 to the engineering machinery 101 of one embodiment of the invention.

The case where cycle motor 200 that Fig. 5 shows engineering machinery 101 accelerates.

When it is desirable that accelerating to the right direction cycle of cycle body, make to revolve by the operation portion 310 operated by operator Valve 300 is returned to move and switch over to the right.

When acceleration, cycle body works as load, thus is being supplied to the hydraulic of cycle motor 200 by main pump 100 Pipeline forms high pressure, and is forming low pressure by the hydraulic line that cycle motor 200 is discharged by cycle motor 200.

When cycle motor 200 is accelerated, the pressure supplied to the working oil of cycle motor 200 is higher than from cycle motor The pressure of 200 discharges.To make working oil switching valve member 530 move and switch over to the left.

In addition, cycle motor 200 can be provided to from the working oil that main pump 100 is supplied, and it is discharged from cycle motor 200 Working oil can be passed to working oil switching valve member 530.

In control unit 950, by the information of the detection operation portion 310 of first pressure detection part 412, current cycle motor The pressure of 200 acceleration mode and the working oil supplied to cycle motor 200, and by second pressure detection part 411 detection from The pressure for the working oil that cycle motor 200 is discharged.To which, the pressure detected by the first pressure detection part 412 is greater than the When pressure detected by two pressure detecting parts 411, control unit 950 is judged as that cycle motor 200 is accelerated.

At this point, the first working oil opening and closing valve member 510 is closed by control unit 950.That is, the work being discharged from cycle motor 200 Make oil and the second accumulator 620 is stored in by working oil switching valve member 530.In addition, passing through pent first working oil It is opened and closed valve member 510, the working oil being discharged from cycle motor 200 is stopped to be discharged to cabinet by cycle valve 300.

Then, the discharge duct of working oil switching valve member 530 is passed to from the working oil that cycle motor 200 is discharged. Then, the working oil for having passed through the discharge duct of working oil switching valve member 530 is provided to the second accumulator 620.That is, The working oil for the low pressure being discharged from cycle motor 200 is stored in two accumulators 620.Specifically, engineering machinery 101 can also include Low-pressure safety valve 680, the low-pressure safety valve 680 are the pressure set in the pressure of the working oil supplied to the second accumulator 620 The working oil is set to be discharged to cabinet when more than power.

In addition, control unit 950 controls regeneration control valve 900 for maximum pressure, so that having passed through work when cycle accelerates The working oil of the low pressure of oil switching valve member 530 is mobile without the first accumulator of normal direction.As an example, the control of regeneration control valve 900 Pressing pressure can be the pressure of the opening pressure higher than cycle safety valve 110.

So that engineering machinery 101 can will have the work than flowing into cycle motor 200 when cycle motor 200 accelerates The working oil of the relatively low pressure of the pressure of oil being discharged from cycle motor 200 is stored in the second accumulator 620.

State when the cycle motor 200 that Fig. 6 shows engineering machinery 101 slows down.

Wish side cycle to the right after the cycle for carrying out cycle body accelerates and when slowing down, the operation portion that is operated by operator 310 operating quantity will be reduced, and cycle valve 300 moves to the right and maintains switched state, but its amount of movement will be less than rotation When returning acceleration.Therefore, the cunning of the cycle valve 300 passed through from the working oil that cycle motor 200 is discharged in order to be moved into cabinet Valve flow path 311 will reduce.But when carrying out cycle deceleration, cycle body is intended to continue to rotate because of inertia, and therefore, cycle motor 200 It will continue to rotate and working oil is discharged.To, since the area of slide valve flow path 311 reduces, the pressure of the discharge side of cycle motor 200 Power will rise.

The pressure of the working oil risen is passed to working oil switching valve member 530.Switch valve member by working oil Pressure difference between 530 side and the other side of working oil switching valve member 530 carrys out switch operating oil switching valve member 530.

When cycle motor 200 is decelerated, the pressure for the working oil being discharged from cycle motor 200 is higher than supplied to cycle electricity The pressure of the working oil of machine 200.To make working oil switching valve member 530 move and switch over to the right.At this point, storage Cycle motor 200 is provided to also by the working oil switching valve member 530 after switching in the working oil of the second accumulator 620. Specifically, it can switch what valve member 530 was stored to the supply of cycle motor 200 when cycle motor 200 accelerates by working oil Working oil and cycle motor 200 are stored in the working oil of the second accumulator 620 when slowing down, to be utilized.In control unit 950, it is electric supplied to cycle by the detection of first pressure detection part 412 in order to detect the deceleration regime of current cycle motor 200 The pressure of the working oil of machine 200, and the pressure for the working oil being discharged by the detection of second pressure detection part 411 from cycle motor 20 Power.To which the pressure detected by the second pressure detection part 411 is greater than detected by first pressure detection part 412 When pressure, control unit 950 is judged as that cycle motor 200 is decelerated.

Control unit 950 is based on the operating oil pressure being discharged from cycle motor 200 detected by second pressure detection part 411 Power, the pressure of the working oil for having passed through first segment discharge orifice 431 detected by third pressure detecting part 421 and set The area of one throttle orifice 431 carrys out stream of the operation as the cycle motor of the flow for the working oil being currently discharged from cycle motor 200 Measure Q.

In addition, operating quantity of the control unit 950 based on the current operation portion 310 by being set to cycle valve 300 calculated The area of the variable slide valve flow path 311 set and the flow Q of the cycle motor calculated carry out operation when from cycle motor The outlet pressure P of cycle motor when 200 delivery flow is discharged to cabinet through slide valve flow path 311_e。

Then, control unit 950 controls regeneration control valve 900.Specifically, the control of regeneration control valve 900 is by control unit 950 Motor outlet pressure P can be equivalent to_eWith the work of the first accumulator 610 detected by pressure store detection part 660 Make the pressure loss of the pressure difference of oil.

As described above, control unit 950 can predict in no cycle regenerative system as cycle slow down when The motor outlet pressure P of the pressure of the discharge side of cycle motor 200_e, and by motor outlet pressure P_eAs cycle regenerative system In control goal pressure.That is, such control goal pressure is used in the control for carrying out regeneration control valve 900, and control Portion 950 can with when no cycle regenerative system similarly maintain engineering machinery 101 cycle regenerative system cycle deceleration sense Feel property.

In addition, when carrying out cycle deceleration, as the motor outlet pressure P predicted_eHigher than the pressure of the first accumulator 610 When, control unit 950 can close the first working oil opening and closing valve member 510, so as to pass through the work of working oil switching valve member 530 The first accumulator 610 can be stored in by making oil.At this point, accumulator valve 650 can be opened.

When carrying out cycle acceleration or when other loads carry out biggish operation, it is stored in such first accumulator 610 The working oil of high pressure can be provided to regeneration motor 800 and driving force when main pump 100 being assisted to be acted.

That is, control unit 950 can be provided to the suction side of cycle motor 200 by main pump 100 first when carrying out cycle deceleration The flow of the working oil of offer, and the working oil of inadequate part can be provided by the second accumulator 620.

Alternatively, working as motor outlet pressure P_eLess than the first accumulator 610 pressure when, control unit 950 can open first Working oil is opened and closed valve member 510 to guide the working oil being discharged from cycle motor 200 to be discharged to cabinet by cycle valve 300. At this point, regeneration control valve 900 can maintain pent state.

Through this structure, the engineering machinery 101 of one embodiment of the invention can be when cycle body slows down according to logical The pressure of the working oil of cycle motor 200 has been crossed to be stored to the first accumulator 610, to be moved in regeneration motor 800 The working oil for being stored in the first accumulator 610 is utilized when making.

In addition, the working oil for having passed through cycle motor 200 can be stored in the when cycle body accelerates by engineering machinery 101 Two accumulators 620, and supplying when cycle body slows down to cycle motor 200 should working oil.

Although the embodiment of the present invention is illustrated above with reference to attached drawing, the technology of this field belonging to the present invention Personnel are understood that the present invention may be implemented as other under the premise of not changing technical idea of the invention or Essential features Specific form.

Therefore, embodiments described above should be understood as being exemplary in all respects, without being restrictive, this The range of invention is shown by aftermentioned claims, also, by the meaning, range and its equivalent concepts of scope of the claims book The derived form for having altered or deforming is interpreted as falling into the scope of the present invention.

Utilization possibility in industry

The engineering machinery of one embodiment of the invention can be discharged from cycle motor in storage when cycle body slows down or accelerates Working oil, to effectively utilize energy possessed by the working oil.

Symbol description

100: main pump, 101,102: engineering machinery, 200: cycle motor, 300: cycle valve, 411: second pressure test section Part, 412: first pressure detection part, 421: third pressure detecting part, 431: first segment discharge orifice, 500: work oil control valve Portion, 510: the first working oils are opened and closed valve member, and 520: the second working oils are opened and closed valve member, and 530: working oil switches valve member, 610: the first accumulators, 620: the second accumulators, 660: pressure store detection part, 900: regeneration control valve, 950: control unit, 400: traffic detection function.