CN210003482U - proportional variable axial plunger pump - Google Patents
proportional variable axial plunger pump Download PDFInfo
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- CN210003482U CN210003482U CN201920786726.0U CN201920786726U CN210003482U CN 210003482 U CN210003482 U CN 210003482U CN 201920786726 U CN201920786726 U CN 201920786726U CN 210003482 U CN210003482 U CN 210003482U
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- axial plunger
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Abstract
The utility model provides an proportional variable axial plunger pump, relate to plunger pump technical field the upper end of the variable casing of this variable axial plunger pump is provided with the proportional electromagnet, pump body pressure oil port department is provided with the flowmeter, the flowmeter is used for the actual displacement value of real-time measurement pump body pressure oil port, flowmeter and proportional electromagnet are connected with the treater electricity respectively, according to predetermineeing the displacement value and coming from the actual displacement value of flowmeter, the treater is through adjusting the proportional electromagnet, make the case of relief pressure valve remove, thereby change the pressure of variable casing epicoele, and then make the variable piston reciprocate, thereby adjust the discharge capacity, through setting up the actual displacement value that the flowmeter comes the real-time measurement plunger pump in oil port department, and feed back this actual displacement value to the treater, revise the control proportion electro-magnet according to predetermineeing the difference between displacement value and this actual displacement value by the treater, thereby realize the dynamic feedback control to the discharge capacity, the precision of discharge capacity control has.
Description
Technical Field
The utility model relates to a plunger pump technical field, concretely relates to kinds of proportional variable axial plunger pumps.
Background
The conventional proportional variable axial plunger pump comprises an external control type proportional variable axial plunger pump and an internal control type proportional variable axial plunger pump, wherein the external control type proportional variable axial plunger pump controls the oil pressure of a variable mechanism through external control oil, and the proportional electromagnet controls the variable mechanism to realize proportional control. The internal control type proportional variable axial plunger pump does not need an external oil pump, and the oil pressure of the variable mechanism is controlled by the direct-acting pressure reducing valve.
However, the proportional electromagnet has a limited accuracy in proportional control of the variable displacement mechanism, and therefore, the displacement control accuracy of the conventional proportional variable axial plunger pump is relatively low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide kinds of proportional variable axial plunger pumps to the not enough of above-mentioned prior art to solve the problem that the displacement control precision of proportional variable axial plunger pump is low.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
the embodiment of the utility model provides an kinds of proportional variable axial plunger pump, the upper end of variable casing of variable axial plunger pump is provided with the proportion electro-magnet, the centre of variable casing is provided with the variable piston, the lateral part of variable casing is provided with the relief pressure valve, the pump body pressure hydraulic fluid port of variable axial plunger pump communicates with each other with the oil inlet of relief pressure valve through the damping hole of the aperture on the main part casing of variable axial plunger pump and the damping screw in the variable casing, the working fluid port of relief pressure valve communicates with each other through the lower chamber of variable casing with last flange aperture and variable casing, when the oil pressure is less than the setting value, pressure oil follows the oil inlet direct flow through the working fluid port, when the oil pressure is higher than the setting value, pressure oil can not follow the oil inlet flows through the working fluid port, the plug screw is equipped with at the lower extreme of variable casing, pump body pressure hydraulic fluid port department is provided with the flowmeter, the flowmeter is used for the actual displacement value of real-time measurement pump body pressure hydraulic fluid port, flowmeter and proportional electro-magnet are connected with the treater electricity respectively, according to predetermine the displacement value and come from the.
Optionally, the pressure reducing valve is a direct acting pressure reducing valve.
Optionally, based on an actual displacement value from the flow meter, when the displacement is required to be increased, the processor adjusts the proportional electromagnet to enable the valve core to move correspondingly, pressure oil flows into the upper cavity of the variable housing through the small hole of the upper flange, the pressure of the upper cavity is greater than that of the lower cavity, so that the variable piston is pushed to move downwards, and the displacement is increased: when the required displacement is reduced, the processor enables the valve core to move correspondingly by adjusting the proportion electromagnet, pressure oil cannot flow into the upper variable shell cavity through the small hole of the upper flange, the upper variable shell cavity is unloaded, the pressure oil in the lower variable shell cavity pushes the variable piston to move upwards, and the displacement is reduced.
Optionally, a damping screw is disposed in the pressure oil hole of the variable housing.
Optionally, a damping screw is disposed within the upper flange aperture.
Optionally, the processor is a single chip microcomputer.
Optionally, the variable displacement axial piston pump further comprises a flow alarm device electrically connected to the processor for emitting an alarm signal when the displacement value from the flow meter is abnormal.
Optionally, the flow alarm device issues an alarm signal when the displacement value from the flow meter is outside a preset range in the processor.
Optionally, the variable displacement axial piston pump further comprises a pressure reducing valve warning device electrically connected to the processor for signaling a warning when an actual displacement change caused by movement of a spool of the pressure reducing valve does not result in from the expected displacement change.
Optionally, the type of alert signal is at least of a sound or a light.
The beneficial effects of the utility model include:
the embodiment of the utility model provides an upper end of variable casing of variable axial plunger pump is provided with the proportion electro-magnet, the centre of variable casing is provided with the variable piston, the lateral part of variable casing is provided with the relief pressure valve, the pump body pressure hydraulic fluid port of variable axial plunger pump communicates with each other with the oil inlet of relief pressure valve through the aperture on the main part casing of variable axial plunger pump and the damping hole of damping screw in the variable casing, the working fluid port of relief pressure valve communicates with each other with upper flange aperture and the lower chamber of variable casing through the variable casing, when the oil pressure is less than the setting value, pressure oil directly flows through the working fluid port from the oil inlet, when the oil pressure is higher than the setting value, pressure oil can not flow through the working fluid port from the oil inlet, the lower extreme at the variable casing is equipped with the plug screw, pump body pressure hydraulic fluid port department is, the flow meter and the proportional electromagnet are respectively electrically connected with the processor, and according to the preset displacement value and the actual displacement value from the flow meter, the processor enables the valve core of the pressure reducing valve to move by adjusting the proportional electromagnet, so that the pressure on the upper cavity of the variable shell is changed, the variable piston is enabled to move up and down, and the displacement is adjusted. The actual displacement value of the plunger pump is measured in real time by arranging the flowmeter at the oil port, the actual displacement value is fed back to the processor, and the electromagnet with the control proportion is corrected by the processor according to the difference between the preset displacement value and the actual displacement value, so that the dynamic feedback control of the displacement is realized, and the precision of the displacement control is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a schematic structural diagram of a proportional variable axial piston pump according to an embodiment of the present invention ;
fig. 2 shows a schematic structural diagram of a proportional variable axial plunger pump according to another embodiment of the present invention.
Reference numerals: 101-variable shell; 102-proportional electromagnet; 103-variable piston; 104-a pressure reducing valve; 105-a body housing; 106-small hole; 107-damping screw; 108-an upper flange; 109-plug screw; 110-a flow meter; 111-a processor; 112-a flow alarm device; 113-relief valve alarm device.
Detailed Description
To further clarify the objects, features and advantages of embodiments of the present invention, a more complete description of embodiments of the present invention is now provided by reference to the drawings which form a part hereof, and it is to be understood that there is described herein a partial embodiment of rather than a complete embodiment thereof.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
For example, "horizontal" merely means that the orientation is more horizontal than "vertical," and does not mean that the structure is intended to be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are intended to be , and for example, may be a fixed connection, a detachable connection, or a body connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, and a communication between two elements.
The conventional proportional electromagnet has limited accuracy in proportional control of the variable displacement mechanism, and therefore, the output displacement control accuracy of the proportional variable axial plunger pump is relatively low, it is necessary to provide proportional variable axial plunger pumps having high-accuracy displacement control.
Fig. 1 shows a schematic structural diagram of a proportional variable axial plunger pump provided in an embodiment of the present invention, as shown in fig. 1, a proportional electromagnet 102 is disposed at an upper end of a variable housing 101 of the variable axial plunger pump, a variable piston 103 is disposed in the middle of the variable housing 101, a pressure reducing valve 104 is disposed at a side portion of the variable housing 101, a pump body pressure port of the variable axial plunger pump is communicated with an oil inlet of the pressure reducing valve 104 through a small hole 106 in a main housing 105 of the variable axial plunger pump and a damping hole of a damping screw 107 in the variable housing 101, a working port of the pressure reducing valve 104 is communicated with a small hole in an upper flange 108 and a lower cavity of the variable housing 101 through the variable housing 101, when an oil pressure is lower than a set value, the pressure oil directly flows through the working port from the oil inlet, when the oil pressure is higher than the set value, the pressure oil cannot flow through the working port from the oil inlet, a screw plug 109 is disposed at a lower end of the variable housing 101, a flow meter 110 is disposed at the pump body pressure port, the flow meter 110 is used for measuring an actual displacement value of the pump body pressure port, the actual displacement electromagnet 102 is electrically connected to a processor 111, and the flow meter 110 is adjusted, thereby the variable electromagnet 102 is moved up and the variable.
Optionally, the pressure relief valve 104 is a direct acting pressure relief valve. Optionally, based on the actual displacement value from the flow meter 110, when the displacement is required to be increased, the processor 111 adjusts the proportional electromagnet 102 to make the valve core move correspondingly, the pressure oil flows into the upper chamber of the variable housing 101 through the small hole of the upper flange 108, the pressure of the upper chamber is greater than that of the lower chamber, so as to push the variable piston 103 to move downwards, and the displacement is increased; when the displacement is required to be reduced, the processor 111 enables the valve core to move correspondingly by adjusting the proportional electromagnet 102, the pressure oil cannot flow into the upper cavity of the variable shell 101 through the small hole of the upper flange 108, the upper cavity of the variable shell 101 is unloaded, the pressure oil in the lower cavity of the variable shell 101 pushes the variable piston 103 to move upwards, and the displacement is reduced. Optionally, a damping screw is provided in the pressure oil hole of the variable housing 101 to make the variable piston 103 act smoothly when moving. Optionally, a damping screw is placed in the small hole of the upper flange 108 to smooth the pressure oil flowing through the upper chamber of the variable housing 101. Optionally, the processor 111 is a single chip microcomputer.
The actual displacement value of the plunger pump is measured in real time by arranging the flowmeter at the oil port, the actual displacement value is fed back to the processor, and the electromagnet with the control proportion is corrected by the processor according to the difference between the preset displacement value and the actual displacement value, so that the dynamic feedback control of the displacement is realized, and the precision of the displacement control is improved.
Fig. 2 shows a schematic diagram of a proportional variable axial piston pump according to another embodiment of the present invention, where as shown in fig. 2, the variable axial piston pump further includes a flow alarm device 112 electrically connected to the processor 111 for sending an alarm signal when the displacement value from the flow meter 110 is abnormal, optionally, the flow alarm device 112 sends an alarm signal when the displacement value from the flow meter 110 exceeds a preset range in the processor 111, optionally, the variable axial piston pump further includes a pressure reducing valve alarm device 113, where the pressure reducing valve alarm device 113 is electrically connected to the processor 111 for sending an alarm signal when the actual displacement change caused by the movement of the spool of the pressure reducing valve 104 is not from the expected displacement change, optionally, the alarm signal is at least in sound or light.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
- The proportional variable axial plunger pump is characterized in that a proportional electromagnet is arranged at the upper end of a variable shell of the variable axial plunger pump, a variable piston is arranged in the middle of the variable shell, a pressure reducing valve is arranged on the side portion of the variable shell, a pump body pressure oil port of the variable axial plunger pump is communicated with an oil inlet of the pressure reducing valve through a small hole in a main shell of the variable axial plunger pump and a damping hole of a damping screw in the variable shell, a working oil port of the pressure reducing valve is communicated with an upper flange small hole and a lower cavity of the variable shell through the variable shell, when oil pressure is lower than a set value, pressure oil directly flows through the working oil port from an oil inlet, when the oil pressure is higher than the set value, the pressure oil cannot flow through the working oil port from the oil inlet, a screw plug is arranged at the lower end of the variable shell, a flow meter is arranged at the pump body pressure oil port and used for measuring an actual discharge value of the pump body pressure, the flow meter and the proportional electromagnet are respectively electrically connected with a processor, and according to the preset discharge value and the actual discharge value from the flow meter, a valve core of the pressure reducing valve moves to adjust the upper cavity so as to move up and down the variable piston.
- 2. The proportional variable axial plunger pump of claim 1, wherein the pressure relief valve is a direct acting pressure relief valve.
- 3. The proportional variable axial plunger pump according to claim 1, wherein when the displacement is required to be increased based on the actual displacement value from the flowmeter, the processor adjusts the proportional electromagnet to enable the valve core to move correspondingly, pressure oil flows into the upper cavity of the variable housing through the small hole of the upper flange, the pressure of the upper cavity is greater than that of the lower cavity, the variable piston is pushed to move downwards, and the displacement is increased; when the required displacement is reduced, the processor adjusts the proportional electromagnet, so that the valve core moves correspondingly, pressure oil cannot flow into the variable shell upper cavity through the upper flange small hole, the variable shell upper cavity is unloaded, the variable shell lower cavity pressure oil pushes the variable piston to move upwards, and the displacement is reduced.
- 4. The proportional variable axial plunger pump according to claim 1, wherein a damping screw is provided in the pressure oil hole of the variable housing.
- 5. The proportional variable axial plunger pump of claim 1, wherein a damping screw is disposed within said upper flange aperture.
- 6. The proportional variable axial plunger pump of claim 1, wherein the processor is a single-chip microcomputer.
- 7. The proportional variable axial plunger pump of any of , further comprising a flow alarm device electrically connected to the processor for signaling an alarm when a displacement value from the flow meter is abnormal.
- 8. The proportional variable axial plunger pump of claim 7, wherein the flow alarm device issues an alarm signal when a displacement value from the flow meter exceeds a preset range in the processor.
- 9. The proportional variable axial plunger pump of any of , further comprising a pressure reducing valve warning device electrically connected to the processor for signaling a warning when an actual displacement change caused by movement of a spool of the pressure reducing valve does not result in an expected displacement change of .
- 10. The proportional variable axial plunger pump of claim 9, wherein the type of alarm signal is at least of a sound or a light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920786726.0U CN210003482U (en) | 2019-05-28 | 2019-05-28 | proportional variable axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920786726.0U CN210003482U (en) | 2019-05-28 | 2019-05-28 | proportional variable axial plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN210003482U true CN210003482U (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920786726.0U Active CN210003482U (en) | 2019-05-28 | 2019-05-28 | proportional variable axial plunger pump |
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| CN (1) | CN210003482U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045829A (en) * | 2022-06-27 | 2022-09-13 | 重庆工业职业技术学院 | Novel axial plunger pump and pump column structure thereof |
| CN116241426A (en) * | 2022-09-08 | 2023-06-09 | 南京卓益控制技术有限公司 | Hydraulic system's oil pressure electric control mechanism and variable pump |
-
2019
- 2019-05-28 CN CN201920786726.0U patent/CN210003482U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045829A (en) * | 2022-06-27 | 2022-09-13 | 重庆工业职业技术学院 | Novel axial plunger pump and pump column structure thereof |
| CN116241426A (en) * | 2022-09-08 | 2023-06-09 | 南京卓益控制技术有限公司 | Hydraulic system's oil pressure electric control mechanism and variable pump |
| CN116241426B (en) * | 2022-09-08 | 2023-10-13 | 南京卓益控制技术有限公司 | Hydraulic system's oil pressure electric control mechanism and variable pump |
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