阅读说明：本技术 一种液力传动箱用液力制动装置 (Hydraulic brake device for hydraulic transmission case ) 是由 庞洁 曹晓龙 万建普 高恩芹 孙志新 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种液力传动箱用液力制动装置,包括油池、供油泵、散热器、液力制动器、比例阀和控制系统,所述液力制动器包括定子和转子,所述供油泵的入口与油池相连,所述供油泵的出口与散热器的入口相连,所述散热器的出口通过主控阀与液力制动器的进油口相连,所述控制系统通过控制电磁阀进而对主控阀进行控制,所述液力制动器的出油口通过一个支路与比例阀的入口相连,所述液力制动器的出油口通过另一个支路与散热器的入口相连,所述比例阀的出口与油池相连,所述控制系统对比例阀进行控制。本发明通过增设比例阀实现调节液力制动器功率的调节,在不同设备和不同工况下均可根据需要进行调节设置,增加了液力制动装置的通用性和灵活性。(The invention discloses a hydraulic brake device for a hydraulic transmission case, which comprises an oil pool, an oil supply pump, a radiator, a hydraulic brake, a proportional valve and a control system, wherein the hydraulic brake comprises a stator and a rotor, the inlet of the oil supply pump is connected with the oil pool, the outlet of the oil supply pump is connected with the inlet of the radiator, the outlet of the radiator is connected with the oil inlet of the hydraulic brake through a main control valve, the control system further controls the main control valve through a control electromagnetic valve, the oil outlet of the hydraulic brake is connected with the inlet of the proportional valve through a branch, the oil outlet of the hydraulic brake is connected with the inlet of the radiator through another branch, the outlet of the proportional valve is connected with the oil pool, and the control system controls the proportional valve. The hydraulic brake device realizes the adjustment of the power of the hydraulic brake by additionally arranging the proportional valve, can be adjusted and arranged according to requirements under different equipment and different working conditions, and increases the universality and flexibility of the hydraulic brake device.)

1. The utility model provides a hydraulic braking device for hydraulic drive case, includes oil bath, fuel feeding pump, radiator, hydraulic brake and control system, hydraulic brake includes stator and rotor, the entry of fuel feeding pump links to each other with the oil bath, the export of fuel feeding pump links to each other with the entry of radiator, the export of radiator passes through the main control valve and links to each other with hydraulic brake's oil inlet, control system controls its characterized in that through control solenoid valve and then to the main control valve: the hydraulic brake system is characterized by further comprising a proportional valve, an oil outlet of the hydraulic brake is connected with an inlet of the proportional valve through a branch, an oil outlet of the hydraulic brake is connected with an inlet of the radiator through another branch, an outlet of the proportional valve is connected with the oil pool, and the control system controls the proportional valve.

2. A hydrodynamic braking device for a hydrodynamic transmission case as defined in claim 1, characterized in that: the stator includes stator body and a plurality of stator blade of setting on stator body, be equipped with inlet port and oil drain hole on the stator, the front that the inlet port passes through stator blade inside from the back of stator to the stator, the oil drain hole sets up the edge at the stator, the center pin of oil drain hole is on a parallel with the direction rather than the stator blade who corresponds.

3. A hydrodynamic braking device for a hydrodynamic transmission case as defined in claim 2, characterized in that: the plurality of stator blades are divided into conventional blades and oil inlet blades, the oil inlet hole penetrates through the inside of the oil inlet blade, and the thickness of the part, provided with the oil inlet hole, of the oil inlet blade is larger than that of the conventional blades.

4. A hydrodynamic braking device for a hydrodynamic transmission case as defined in claim 3, characterized in that: the middle of the edge of the oil inlet blade is recessed inwards to form an oil inlet hole end face, the oil inlet hole end face is perpendicular to the oil inlet blade, and the oil inlet hole extends to the oil inlet hole end face from the back face of the stator.

5. The hydraulic brake device for a hydraulic transmission case according to claim 4, wherein: the stator blades incline towards the rotating direction of the rotor, the inclination angle of the stator blades is 30-45 degrees, and the central axis of the oil inlet hole is parallel to the direction of the stator blades.

6. The hydraulic brake device for a hydraulic transmission case according to claim 5, wherein: the angle of inclination of the stator vanes is 45 degrees.

7. The hydraulic brake device for a hydraulic transmission case according to any one of claims 2 to 6, wherein: the rotor is provided with a plurality of rotor blades, and the inclination directions and the inclination angles of the rotor blades and the stator blades are the same.

8. a hydrodynamic braking device for a hydrodynamic transmission case as defined in claim 7, characterized in that: the back of rotor is equipped with supplementary blade, supplementary blade is the rib form arch of bar, the extension line of supplementary blade's center pin is tangent with the hole edge of rotor.

9. A hydrodynamic braking device for a hydrodynamic transmission case as defined in claim 1, characterized in that: the oil supply pump is a gear pump, and a filter is arranged between the oil supply pump and the oil pool.

Technical Field

The invention relates to a hydraulic brake device, in particular to a hydraulic brake device for a hydraulic transmission case.

Background

The brake shoe brake is frequently used to control the speed of the rolling stock running on a mountain area when the rolling stock runs downhill, the brake shoe is seriously worn due to long-term use, and a large amount of heat is generated, so that the rolling stock is very unfavorable for the safe running of the rolling stock.

In addition to the need for auxiliary braking means on the locomotive, it is required for safety reasons that the speed of the locomotive is adjustable or kept constant at a low speed downhill for vehicles running downhill, i.e. the braking power is steplessly adjustable depending on the vehicle speed.

At present, the following locomotive auxiliary braking modes are commonly used:

1. Hydraulic brake

The hydraulic brake device realizes braking by generating braking torque on a hydraulic pump shaft through liquid flow throttling, and energy is converted into heat energy through the throttling of the liquid. It can provide constant torque braking from zero speed to any working point of high speed, but it can only be used in the range of medium and small power due to the restriction of volume, and the hydraulic pump is worn.

2. Engine exhaust brake

A valve is installed in the exhaust pipe of the engine, and when the valve is closed, the engine is operated as an air compressor, and in the exhaust stroke, the gas in the exhaust manifold is compressed, and the engine obtains negative work, thereby generating braking force. This braking mode is noisy and complicated to control.

3. Electric eddy current type brake

After the power is switched on, the coil generates a magnetic field, the disc rotates in the magnetic field to generate an eddy current, and the eddy current and the magnetic field interact to generate a braking torque. The braking torque provided by this braking method is relatively small.

4. Hydraulic brake

The working wheel is formed by a stator and a rotor. The kinetic energy of the rolling stock is converted into the heat energy of the liquid by the action of the liquid flow in the working wheel, and the rolling stock is braked by a heat dissipation mode of a cooler, so that the rolling stock is suitable for braking from 30km/h to 200 km/h.

The hydraulic brake is used as an auxiliary brake mode of the locomotive and has remarkable advantages, but the power of the existing hydraulic brake device cannot be flexibly adjusted, and the universality is greatly limited.

Disclosure of Invention

The invention aims at solving the problems and researches and designs a hydraulic brake device for a hydraulic transmission case.

The technical means adopted by the invention are as follows:

The utility model provides a hydraulic braking device for hydraulic transmission case, includes oil bath, fuel feeding pump, radiator, hydraulic brake and control system, hydraulic brake includes stator and rotor, the entry of fuel feeding pump links to each other with the oil bath, the export of fuel feeding pump links to each other with the entry of radiator, the export of radiator links to each other through the oil inlet of main control valve with hydraulic brake, control system passes through the control solenoid valve and then controls the main control valve, hydraulic braking device still includes the proportional valve, hydraulic brake's oil-out links to each other through the entry of a branch road with the proportional valve, hydraulic brake's oil-out links to each other through the entry of another branch road with the radiator, the export of proportional valve links to each other with the oil bath, control system controls the proportional valve.

Further, the stator includes stator body and a plurality of stator blade of setting on stator body, be equipped with inlet port and oil drain hole on the stator, the inlet port passes through the inside front that extends to the stator of stator blade from the back of stator, the oil drain hole sets up the edge at the stator, the center pin in oil drain hole is on a parallel with the direction rather than the stator blade that corresponds.

Further, the plurality of stator blades are divided into conventional blades and oil inlet blades, the oil inlet hole penetrates through the inside of the oil inlet blade, and the thickness of the part, provided with the oil inlet hole, of the oil inlet blade is larger than that of the conventional blades.

Furthermore, the middle part of the edge of the oil inlet blade is recessed inwards to form an oil inlet hole end face, the oil inlet hole end face is perpendicular to the oil inlet blade, and the oil inlet hole extends to the oil inlet hole end face from the back face of the stator.

Further, the stator blades incline towards the rotation direction of the rotor, the inclination angle of the stator blades is 30-45 degrees, and the central axis of the oil inlet hole is parallel to the direction of the stator blades.

further, the inclination angle of the stator blade is 45 degrees.

Furthermore, a plurality of rotor blades are arranged on the rotor, and the inclination directions and the inclination angles of the rotor blades and the stator blades are the same.

Further, the back of the rotor is provided with auxiliary blades, the auxiliary blades are strip-shaped rib-shaped protrusions, and the extension line of the central shaft of each auxiliary blade is tangent to the edge of the inner hole of the rotor.

Further, the oil supply pump is a gear pump, and a filter is arranged between the oil supply pump and the oil pool.

Compared with the prior art, the hydraulic brake device for the hydraulic transmission case realizes the adjustment of the power of the hydraulic brake by additionally arranging the proportional valve, can be adjusted and arranged according to requirements under different equipment and different working conditions, and increases the universality and flexibility of the hydraulic brake device.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a stator according to an embodiment of the present invention.

3 fig. 3 3 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 2 3. 3

Fig. 4 is a sectional view B-B of fig. 2.

fig. 5 is a schematic structural diagram of a hydraulic brake according to an embodiment of the present invention.

Fig. 6 is a schematic view of a back structure of a rotor according to an embodiment of the present invention.

Detailed Description

as shown in fig. 1, a hydraulic brake device for a hydraulic transmission case includes an oil reservoir 90, an oil supply pump 20, a radiator 30, a hydraulic brake 40, and a control system 50, the hydraulic brake 40 includes a stator and a rotor, an inlet of the oil supply pump 20 is connected to an oil sump 90, an outlet of the oil supply pump 20 is connected to an inlet of the radiator 30, an outlet of the radiator 30 is connected to an oil inlet of the hydraulic brake 40 through a main control valve 70, the control system 50 controls the main control valve 70 by controlling the solenoid valve 60, and the hydraulic brake device further includes a proportional valve 80, the outlet of said hydraulic brake 40 is connected to the inlet of the proportional valve 80 by a branch, the oil outlet of said hydraulic brake 40 is connected to the inlet of the radiator 30 through another branch, the outlet of the proportional valve 80 is connected to the sump and the control system 50 controls the proportional valve 80. The main control valve 70 is a hydraulic valve, and the control system 50 controls hydraulic oil through the electromagnetic valve 60, thereby controlling the opening and closing of the main control valve 70. In fig. 1, the oil path with double arrows is control oil, and the oil path with single arrows is working oil. The oil supply pump 20 is a gear pump, and a filter 10 is arranged between the oil supply pump 20 and the oil pool 90.

As shown in fig. 2 to 6, the stator 8 includes a stator body and a plurality of stator vanes 1 disposed on the stator body, the stator is provided with an oil inlet 2 and an oil outlet 3, the oil inlet 2 extends from the back of the stator to the front of the stator through the inside of the stator vanes 1, the oil outlet 3 is disposed at the edge of the stator, and the central axis of the oil outlet 3 is parallel to the direction of the stator vanes 1 corresponding to the position thereof. Along with the rotation of the rotor, the entering oil is thrown to the edge of the impeller under the action of centrifugal force and is discharged, so that the resistance of oil discharge is reduced, and the oil needs to be rapidly fed and discharged during hydraulic braking.

The plurality of stator vanes 1 are divided into conventional vanes 1 'and oil inlet vanes 1 ", the oil inlet hole 2 penetrates through the inside of the oil inlet vane 1", and the thickness of the part of the oil inlet hole 2 of the oil inlet vane 1 "is larger than that of the conventional vanes 1'. In this embodiment, a plurality of oil inlet vanes 1 "are circumferentially distributed on the stator, and two or more conventional vanes 1' are provided between adjacent oil inlet vanes 1".

The middle part of the edge of the oil inlet blade 1 'is concave to form an oil inlet end face 4, the oil inlet end face 4 is perpendicular to the oil inlet blade 1', and the oil inlet 2 extends to the oil inlet end face 4 from the back of the stator. The oil inlet hole 2 crosses the stator blade 1 and directly reaches the center of a circle formed by the rotor and the stator, so that oil inlet resistance is reduced, and oil can be fed quickly.

The stator blade 1 inclines towards the rotation direction of the rotor, the inclination angle of the stator blade 1 is 30-45 degrees, and the central axis of the oil inlet hole 2 is parallel to the direction of the stator blade 1. In this embodiment, the central axis of inlet port is located the ascending central plane of oil inlet blade thickness direction. Preferably, the angle of inclination of the stator vanes is 45 degrees.

A plurality of rotor blades 6 are arranged on the rotor 5. The inclination directions and the inclination angles of the rotor blades 6 and the stator blades 1 are the same, the inclination angle of the stator blade 1 refers to the angle between the stator blade 1 and the bottom surface of the stator, and the inclination angle of the rotor blade 6 refers to the angle between the rotor blade 6 and the bottom surface of the rotor. The present embodiment combines the inlet-outlet pressure difference of the hydraulic brake and the structural design parameters of the rotor and the blades, so that the ratio of the vortex speed to the peripheral speed of the rotor 5 in the hydraulic brake is about 3: 1.

As shown in fig. 6, the back of the rotor 5 is provided with auxiliary blades 7, and the auxiliary blades 7 are rib-shaped protrusions. The extension line of the central shaft of the auxiliary blade 7 is tangent with the inner hole edge of the rotor 5. The auxiliary blade 7 generates an axial force opposite to the rotor blade when the rotor rotates, and balances the axial force inside the hydraulic brake.

When the locomotive normally runs, the oil supply pump 20 pumps the working oil out of the oil sump 90, the working oil passes through the filter 10 to the radiator 30, the working oil cooled by the radiator 30 enters the main control valve 70 to wait for filling the brake 40 with the oil, when the control system 50 obtains an instruction from the locomotive requiring braking, the brake solenoid valve 60 is controlled to be electrically operated, the control oil enters the main control valve 70 through the brake solenoid valve 60, the main control valve 70 acts, the working oil waiting at the main control valve 70 passes through the hydraulic brake 40 to start oil filling work, the locomotive starts braking along with the oil filling work, the temperature of the working oil in the hydraulic brake 40 is rapidly increased after being stirred, one part of the discharged working oil enters the radiator 30 to be cooled, the cooled working oil enters the next circulation, the other part of the working oil enters the proportional valve 80 and then returns to the oil sump 90, and the proportional valve 80 plays a role in overflow regulation, the amount of the liquid filling in the hydraulic brake 40 can be adjusted, so that the power of the hydraulic brake 40 can be adjusted, and the outlet pressure of the brake can be ensured to be a certain pressure.

under the action of the proportional valve 80, the working oil at the outlet of the hydraulic brake 40 and in the cavity always has a certain pressure, and under the action of oil pressure, air can be quickly separated from the oil. The hydraulic brake 40 can quickly separate air mixed in oil even if the hydraulic brake works in partial liquid filling, and the power regulation of the hydraulic brake is realized, the efficiency of the brake is improved, and meanwhile, the stability of system regulation is also ensured.

The displacement of the feed pump 20 is kept constant throughout the braking process.

The embodiment is suitable for high-speed and high-power vehicles; the brake is small, light in weight and convenient to install; the brake is suitable for long-time continuous braking without mechanical abrasion; the downhill driving safety is improved; the constant low speed of the downhill can be realized; the noise is low; the continuous braking capability is strong.

The aim of adjusting the braking power can be achieved by adjusting the current of the proportional valve and further adjusting the oil filling amount of the brake. The regulation of the braking power is divided into the following two categories:

1. And (3) equal power regulation:

The constant power braking system is a system in which the braking power is constant and the braking force is reduced in proportion to the increase in the vehicle speed.

2. Equal torque curve or braking force rising curve:

When the locomotive starts to brake, the brake curve can be adjusted into a brake force rising curve by adjusting the current of the proportional valve, the brake force is increased along with the increase of the speed of the train, when the speed of the train reaches 20% -30% of the maximum speed, the brake force reaches the maximum value, after the maximum brake force is reached, the brake force cannot be increased without limit under the limitation of adhesion, the oil temperature and the cooling water temperature of a hydraulic transmission box and the mechanical strength, and the brake force curve can be adjusted into an equal power curve by adjusting the current of the proportional valve.

When the locomotive brakes downhill, the current of the proportional valve is adjusted to increase the braking force along with the increase of the rotating speed, so that an equal-torque braking or braking force rising curve is formed, the equal-torque braking or braking force rising curve is controlled together with a control unit of the locomotive on the downhill of a variable slope, and the downhill of the locomotive at a constant speed can be realized by changing the throttle of the diesel engine, so that the safety of the locomotive is improved.

When the braking power is increased to the maximum allowable power which can be borne by the cooling device, in order to prevent damage to the cooling device and the transmission case, the continuous increase of the braking force must be stopped, at the moment, the current of the electromagnet is regulated, the opening degree of the proportional valve is further regulated, the oil discharge flow rate is also increased, the oil filling degree of the brake is reduced, the braking force is reduced, and an equal-power braking curve is formed.

In high-speed emergency braking, in order to protect a brake and a radiator, once the oil temperature or the cooling water temperature of the brake reaches a set value, hydraulic braking needs to be relieved, an actual value of the oil temperature or the cooling water temperature of the brake can be set to be fed back to a transmission case control system for short delay, and the braking force is allowed to have short overload, so that the high-speed emergency braking of a vehicle is facilitated.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.