阅读说明：本技术 柱塞泵控制方法及装置 (Plunger pump control method and device ) 是由 黄忠华 于 2018-05-18 设计创作，主要内容包括：本发明提供一种柱塞泵控制方法及装置。其中柱塞泵控制方法包括；通过获取柱塞泵的目标流量；获取电机的最大效率值；根据所述电机的最大效率值获取与其对应的最小转速值；根据所述最小转速值与所述目标流量计算得到所述柱塞泵的第一摆角值；若所述第一摆角值在预设范围以内,则将所述第一摆角值和最小转速值确定为目标摆角值和目标转速值；根据所述目标转速值和目标摆角值控制所述柱塞泵。本发明提供的柱塞泵控制方法及装置可以获得电机的目标转速值和柱塞泵的目标摆角值,从而可以提高电机的工作效率,提高能源的利用率。(The present invention provides a kind of plunger pump control method and device.Wherein plunger method for controlling pump includes；By the target flow for obtaining plunger pump；Obtain the maximum efficiency value of motor；Corresponding minimum speed value is obtained according to the maximum efficiency value of the motor；The first pivot angle value of the plunger pump is calculated according to the minimum speed value and the target flow；If the first pivot angle value is determined as target pivot angle value and rotating speed of target value within preset range, by the first pivot angle value and minimum speed value；The plunger pump is controlled according to the rotating speed of target value and target pivot angle value.Plunger pump control method and device provided by the invention can obtain the rotating speed of target value of motor and the target pivot angle value of plunger pump improves the utilization rate of the energy so as to improve the working efficiency of motor.)

1. a kind of plunger method for controlling pump characterized by comprising

Obtain the target flow of plunger pump；

Obtain the maximum efficiency value of motor；

Corresponding minimum speed value is obtained according to the maximum efficiency value；

The first pivot angle value of the plunger pump is calculated according to the minimum speed value and the target flow；

If the first pivot angle value is determined as target pendulum within preset range, by the first pivot angle value and minimum speed value Angle value and rotating speed of target value；

The plunger pump is controlled according to the rotating speed of target value and target pivot angle value.

2. plunger method for controlling pump according to claim 1, which is characterized in that further include:

If the first pivot angle value is other than preset range；

Other tachometer values corresponding with the maximum efficiency value are then successively traversed from small to large, until the tachometer value currently traversed The second pivot angle value being calculated with the target flow is within preset range；

The tachometer value by the second pivot angle value and currently traversed is determined as the target pivot angle value and rotating speed of target value.

3. plunger method for controlling pump according to claim 2, which is characterized in that further include:

If the second pivot angle value that other tachometer values corresponding with the maximum efficiency value and preset flow are calculated is all default Other than range；

Traverse the motor successively from big to small then for other efficiency values of selection；

Revolving speed section corresponding to the efficiency value traversed is obtained, and is successively traversed from small to large each in the revolving speed section A tachometer value, until the third pivot angle value that one of tachometer value and the target flow are calculated is within preset range；

The tachometer value by the third pivot angle value and currently traversed is determined as the target pivot angle value and rotating speed of target value.

4. plunger method for controlling pump according to any one of claims 1 to 3, which is characterized in that described according to the target Tachometer value and target pivot angle value control the plunger pump, comprising:

Obtain the current pivot angle value of the plunger pump；

If the current pivot angle value and the target pivot angle value are unequal, the swash plate movement of the plunger pump is controlled, so that institute It is equal with the target pivot angle value to state current pivot angle value.

5. plunger method for controlling pump according to any one of claims 1 to 3, which is characterized in that obtain the maximum effect of motor Rate value obtains corresponding minimum speed value according to the maximum efficiency value of the motor, comprising:

The maximum efficiency value of the motor is chosen in efficiency-rotary speed data library, and is existed according to the maximum efficiency value of the motor Minimum speed value corresponding with the maximum efficiency value is chosen in the efficiency-rotary speed data library.

6. a kind of plunger apparatus for controlling pump characterized by comprising

Module is obtained, for obtaining the target flow of plunger pump；

The maximum efficiency value for obtaining module and being also used to obtain motor；

The acquisition module is also used to obtain corresponding minimum speed value according to the maximum efficiency value；

Determining module, for the first pivot angle of the plunger pump to be calculated according to the minimum speed value and the target flow Value；

Judgment module, if for the first pivot angle value within preset range, by the first pivot angle value and minimum speed Value is determined as target pivot angle value and rotating speed of target value；

Drive module controls the plunger pump according to the rotating speed of target value and target pivot angle value.

7. plunger apparatus for controlling pump according to claim 6, which is characterized in that the judgment module is also used to:

If the first pivot angle value is other than preset range；

Other tachometer values corresponding with the maximum efficiency value are then successively traversed from small to large, until the tachometer value currently traversed The second pivot angle value being calculated with the target flow is within preset range；

The tachometer value by the second pivot angle value and currently traversed is determined as the target pivot angle value and rotating speed of target value.

8. plunger apparatus for controlling pump according to claim 7, which is characterized in that the judgment module is also used to:

If the second pivot angle value that other tachometer values corresponding with the maximum efficiency value and preset flow are calculated is all default Other than range；

Traverse the motor successively from big to small then for other efficiency values of selection；

Revolving speed section corresponding to the efficiency value traversed is obtained, and is successively traversed from small to large each in the revolving speed section A tachometer value, until the third pivot angle value that one of tachometer value and the target flow are calculated is within preset range；

The tachometer value by the third pivot angle value and currently traversed is determined as the target pivot angle value and rotating speed of target value.

9. according to the described in any item plunger apparatus for controlling pump of claim 6 to 8, which is characterized in that the drive module is also used In:

Obtain the current pivot angle value of the plunger pump；

If the current pivot angle value and the target pivot angle value are unequal, the swash plate movement of the plunger pump is controlled, so that institute It is equal with the target pivot angle value to state current pivot angle value.

10. according to the described in any item plunger apparatus for controlling pump of claim 6 to 8, which is characterized in that the acquisition module is also used In:

The maximum efficiency value of the motor is chosen in efficiency-rotary speed data library, and is existed according to the maximum efficiency value of the motor Minimum speed value corresponding with the maximum efficiency value is chosen in the efficiency-rotary speed data library.

Technical field

The present invention relates to hydraulic control technology more particularly to a kind of plunger pump control method and device.

Background technique

Plunger pump is the dynamical element in hydraulic system, for the executive component output certain flow into hydraulic system Hydraulic oil, to provide the pressure energy of liquid.The pressure energy of liquid can be converted to mechanical energy by executive component, for driving and being somebody's turn to do Straight reciprocating motion or rotary motion are made in the connected load of executive component.Above-mentioned plunger pump can be quantitative plunger pump or variable column Plug pump.

Currently, axial variable displacement plunger pump is common one of Variable plunger pump, the axial variable displacement plunger pump is (hereinafter referred to as " plunger pump ") include: pump ontology, with pump the ontology motor and controller that are connected, the discharge capacity of plunger pump mainly with turn of motor The pivot angle of swash plate is related in speed and pump ontology, and when the discharge capacity for needing pilot plunger to pump, controller controls motor work in volume Determine revolving speed, and calculates the pivot angle of swash plate in pump ontology according to the target flow of user's input, and then adjust the output stream of pump ontology Amount, so that the The hydraulic oil that plunger pump is exported can satisfy user demand.

However, in the prior art, motor always works at rated speed, when the output flow of plunger pump is excessive or too small When, the efficiency of motor is lower, and power input to a machine is caused to only have small part to be converted to mechanical kinetic energy, causes the wave of the energy Take.

Summary of the invention

The present invention provides a kind of plunger pump control method and device, to improve the efficiency of motor, improves efficiency of energy utilization.

The present invention provides a kind of plunger method for controlling pump, comprising: obtains the target flow of plunger pump；Obtain the maximum of motor Efficiency value；Corresponding minimum speed value is obtained according to the maximum efficiency value；According to the minimum speed value and the mesh Mark flow rate calculation obtains the first pivot angle value of the plunger pump；If the first pivot angle value, will be described within preset range First pivot angle value and minimum speed value are determined as target pivot angle value and rotating speed of target value；It is put according to the rotating speed of target value and target Angle value controls the plunger pump.

Plunger method for controlling pump as described above, further includes: if the first pivot angle value is other than preset range；Then from small To other tachometer values corresponding with the maximum efficiency value are successively traversed greatly, until the tachometer value currently traversed and the target The second pivot angle value that flow rate calculation obtains is within preset range；The tachometer value by the second pivot angle value and currently traversed is true It is set to the target pivot angle value and rotating speed of target value.

Plunger method for controlling pump as described above, further includes: if other tachometer values corresponding with the maximum efficiency value with The second pivot angle value that preset flow is calculated is all other than preset range；Traverse the motor successively from big to small then for choosing Other efficiency values taken；Revolving speed section corresponding to the efficiency value traversed is obtained, and successively traverses described turn from small to large Every speed value in fast section, until the third pivot angle value that one of tachometer value is calculated with the target flow is pre- If within range；The tachometer value by the third pivot angle value and currently traversed is determined as the target pivot angle value and rotating speed of target Value.

Plunger method for controlling pump as described above, wherein described to be controlled according to the rotating speed of target value and target pivot angle value The plunger pump, comprising: obtain the current pivot angle value of the plunger pump；If the current pivot angle value and the target pivot angle value are not It is equal, then the swash plate movement of the plunger pump is controlled, so that the current pivot angle value is equal with the target pivot angle value.

Plunger method for controlling pump as described above, wherein the maximum efficiency value for obtaining motor, according to the maximum of the motor Efficiency value obtains corresponding minimum speed value, comprising: the maximal efficiency of the motor is chosen in efficiency-rotary speed data library Value, and chosen in the efficiency-rotary speed data library according to the maximum efficiency value of the motor it is corresponding with the maximum efficiency value most Small tachometer value.

The present invention also provides a kind of plunger apparatus for controlling pump, comprising: module is obtained, for obtaining the target stream of plunger pump Amount；The maximum efficiency value for obtaining module and being also used to obtain motor；The acquisition module is also used to according to the maximal efficiency Value obtains corresponding minimum speed value；Determining module, for being calculated according to the minimum speed value and the target flow Obtain the first pivot angle value of the plunger pump；Judgment module, if for the first pivot angle value within preset range, by institute It states the first pivot angle value and minimum speed value is determined as target pivot angle value and rotating speed of target value；Drive module turns according to the target Speed value and target pivot angle value control the plunger pump.

Plunger apparatus for controlling pump as described above, wherein the judgment module is also used to: if the first pivot angle value is pre- If other than range；Other tachometer values corresponding with the maximum efficiency value are then successively traversed from small to large, until currently traversing Tachometer value and the second pivot angle value for being calculated of the target flow within preset range；By the second pivot angle value and work as Before the tachometer value that traverses be determined as the target pivot angle value and rotating speed of target value.

Plunger apparatus for controlling pump as described above, wherein the judgment module is also used to: if with the maximum efficiency value pair The second pivot angle value that other tachometer values and preset flow answered are calculated is all other than preset range；Then from big to small successively time The motor is gone through for other efficiency values of selection；Obtain revolving speed section corresponding to the efficiency value that traverses, and from it is small to The every speed value in the revolving speed section is successively traversed greatly, until one of tachometer value is calculated with the target flow Third pivot angle value within preset range；The tachometer value by the third pivot angle value and currently traversed is determined as the target Pivot angle value and rotating speed of target value.

Plunger apparatus for controlling pump as described above, wherein the drive module is also used to: obtaining the current of the plunger pump Pivot angle value；If the current pivot angle value and the target pivot angle value are unequal, the swash plate movement of the plunger pump is controlled, so that The current pivot angle value is equal with the target pivot angle value.

Plunger apparatus for controlling pump as described above, wherein the acquisition module is also used to: in efficiency-rotary speed data library The maximum efficiency value of the motor is chosen, and is chosen in library according to the maximum efficiency value of the motor in the efficiency-rotary speed data Minimum speed value corresponding with the maximum efficiency value.

Plunger pump control method and device provided by the invention, by the target flow for obtaining plunger pump；Obtain motor Maximum efficiency value；Corresponding minimum speed value is obtained according to the maximum efficiency value of the motor；According to the minimum speed The first pivot angle value of the plunger pump is calculated in value and the target flow；If the first pivot angle value preset range with It is interior, then the first pivot angle value and minimum speed value are determined as target pivot angle value and rotating speed of target value；Turned according to the target Speed value and target pivot angle value control the plunger pump, it is hereby achieved that the target pivot angle of the rotating speed of target value of motor and plunger pump Value, so as to improve the working efficiency of motor, improves the utilization rate of the energy.

Detailed description of the invention

The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention Example, and be used to explain the principle of the present invention together with specification.

Fig. 1 is the flow chart of plunger method for controlling pump embodiment one of the present invention；

Fig. 2 is the schematic diagram of the efficiency of motor of the present invention and the corresponding relationship of revolving speed；

Fig. 3 is the flow chart of plunger method for controlling pump embodiment two of the present invention；

Fig. 4 is the structure principle chart of plunger apparatus for controlling pump embodiment one of the present invention.

Appended drawing reference:

1: obtaining module；2: determining module；

3: judgment module；4: drive module.

Specific embodiment

Plunger pump is the dynamical element in hydraulic system, for the executive component output certain flow into hydraulic system Hydraulic oil, to provide the pressure energy of liquid.The pressure energy of liquid can be converted to mechanical energy by executive component, for driving and being somebody's turn to do Straight reciprocating motion or rotary motion are made in the connected load of executive component.Above-mentioned plunger pump can be quantitative plunger pump or variable column Plug pump.

Currently, axial variable displacement plunger pump is common one of Variable plunger pump, the axial variable displacement plunger pump is (hereinafter referred to as " plunger pump ") include: pump ontology, with pump the ontology motor and controller that are connected, the discharge capacity of plunger pump mainly with turn of motor The pivot angle of swash plate is related in speed and pump ontology, and when the discharge capacity for needing pilot plunger to pump, controller controls motor work in volume Determine revolving speed, and calculates the pivot angle of swash plate in pump ontology according to the target flow of user's input, and then adjust the output stream of pump ontology Amount, so that the The hydraulic oil that plunger pump is exported can satisfy user demand.

However, in the prior art, motor always works at rated speed, when the output flow of plunger pump is excessive or too small When, the efficiency of motor is lower, and power input to a machine is caused to only have small part to be converted to mechanical kinetic energy, causes the wave of the energy Take.

To solve the above-mentioned problems, the embodiment of the present invention provides a kind of plunger pump control method and device, to improve motor Working efficiency and the energy utilization rate.

In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.