CN201818451U - Position-spring-force feedback-type electric proportional variable axial plunger pump - Google Patents
Position-spring-force feedback-type electric proportional variable axial plunger pump Download PDFInfo
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- CN201818451U CN201818451U CN2010205758126U CN201020575812U CN201818451U CN 201818451 U CN201818451 U CN 201818451U CN 2010205758126 U CN2010205758126 U CN 2010205758126U CN 201020575812 U CN201020575812 U CN 201020575812U CN 201818451 U CN201818451 U CN 201818451U
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Abstract
A position-spring-force feedback-type electric proportional variable axial plunger pump comprises a variable plunger pump main body and a variable mechanism arranged on one side of the variable plunger pump main body, wherein the variable mechanism comprises a control piston, a feedback rod, a feedback spring, a valve core, a valve sleeve, a pre-compression spring, a proportional electromagnet and the like; and the main body is connected with the variable mechanism via the feedback rod and the feedback spring. In the electric proportional variable axial plunger pump, the valve core is controlled to move according to the change of the electric current of the proportional electromagnet, so as to enable oil inside a control valve to enter into a smaller cavity and a larger cavity of a variable piston, thereby realizing that a swash plate is controlled to move via the side-to-side movement of the variable piston; meanwhile, the displacement of a piston is controlled in a feedback manner via the feedback rod mounted on the control piston, the feedback spring is compressed to transmit the force to the valve core, so as to enable the valve core to be kept in a new position, thereby realizing an approximate linear proportional relationship between the discharge capacity of the pump and the input signal of the input proportional electromagnet. In the electric proportional variable axial plunger pump, the mode of position-spring-force feedback is adopted, so that the servo control to the electromagnetic force and the pump is realized.
Description
Technical field
The utility model relates to hydraulic pressure, machinery, electron controls technology field.Especially relate to the inclined disc type axial hydraulic plunger pump of a kind of electric proportional control, specifically a kind of position-spring-force feedback type electricity rate variable axial piston pump.
Background technique
In pump control system, variable displacement pump promptly is that dynamical element is again the control unit of system, the variable pump performance has crucial effects to the performance of whole pump control system, the speed of response and the precision that how to improve variable displacement pump are to improve the key of pump control system performance, and variable displacement pump and its stroking mechanism itself are exactly a control system, and the performance of this control system is to variable displacement pump and stroking mechanism important influence thereof.Variable displacement pump is divided into discharge capacity adjusting, Flow-rate adjustment, pressure adjusting and power adjustments four big classes by its control function, the fundamental type of volume adjustment variable displacement pump is that discharge capacity is regulated pump, it can realize pump displacement and the proportional control function of input signal under arbitrary given working pressure.In discharge capacity Moderator Variable pump variable control system, the feedback system between control piston and the control guiding valve has position follower, electricity feedback and displacement-force feedback etc.But longer for big displacement plunger pump stroking mechanism stroke, therefore be difficult to realize electronic closed loop control.
Summary of the invention
Technical problem to be solved in the utility model is at above-mentioned prior art present situation, provide have simple in structure, be quick on the draw, speed of response is fast, a kind of position-spring of stable performance-force feedback type electricity rate variable axial piston pump.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of position-spring-force feedback type electricity rate variable axial piston pump, comprise Variable plunger pump main body and the stroking mechanism that is installed in Variable plunger pump main body one side, described Variable plunger pump main body comprises pump case and is fitted in pump case interior transmission shaft, cylinder body, swash plate, plunger that wherein: described stroking mechanism comprises control piston, feedback rod, feedback spring, valve core, valve pocket, pretensioned spring and proportion electro-magnet; Described control piston is arranged in the pump case and with swash plate and links, described feedback rod one end stretches in the pump case fixedlys connected with control piston, its the other end and the press fit of feedback spring cover, described feedback spring, valve core, valve pocket, pretensioned spring match and are installed in the control valve casing, form control valve; Described proportion electro-magnet is placed in terminal and the moving by input current size control valve core of control valve, described feedback rod is by the displacement of feedback control piston, the compressed feedback spring becomes power and passes to valve core, forms direct position-spring-force feedback type control system.
For optimizing technique scheme, the concrete measure of taking also comprises:
Above-mentioned valve pocket is fitted in the inner chamber of valve core, and described feedback spring, pretensioned spring overlap the front-end and back-end that fit over valve pocket respectively.
Above-mentioned valve pocket front end fixedly is fitted with the feedback spring seat, and described feedback spring is sleeved on the feedback spring seat and cooperates with the feedback rod roof pressure.
Above-mentioned pretensioned spring cooperates with the valve pocket suit through pressure regulating seat.
Above-mentioned control piston suit has been press-fitted return spring, and control piston is articulated and connected with swash plate and cooperates.
Above-mentioned pump case comprises equipped mutually housing and bonnet, and the piston cavity of described control piston is arranged in the bonnet.
Above-mentioned plunger is fitted in the cylinder body, and matches with swash plate by the equipped plunger piston slippery boots of front end.
It is equipped mutually that above-mentioned transmission shaft passes housing, swash plate and cylinder body successively.
Compared with prior art, its stroking mechanism of the utility model comprises control piston, feedback rod, feedback spring, valve core, valve pocket, pretensioned spring and proportion electro-magnet; Described control piston is arranged in the pump case and with swash plate and links, described feedback rod one end stretches in the pump case fixedlys connected with control piston, its the other end and the press fit of feedback spring cover, described feedback spring, valve core, valve pocket, pretensioned spring match and are installed in the control valve casing, form control valve, described proportion electro-magnet is placed in terminal and the moving by input current size control valve core of control valve, described feedback rod is by the displacement of feedback control piston, the compressed feedback spring becomes power and passes to valve core, forms direct position-spring-force feedback type control system.The utility model is optimized stroking mechanism on the basis of traditional flow control.Simplified hydraulic system significantly, moving of the change control valve heart of proportion of utilization electromagnet current, make the big loculus of the oily entering variable piston in the control valve, thereby make the motion of variable piston side-to-side movement control swash plate, meanwhile be installed in the displacement of the feedback rod feedback control piston on the control piston, give valve core by compressed feedback spring transmission power, make valve core be on the new position, thereby pump delivery and the approaching linear proportionate relationship of the input signal of input proportion electro-magnet have been realized, form by position-spring-force feedback realizes electromagnetic force, the servocontrol of pump displacement, this pump control flexibly, be active in one's movements, the repeatability height, good stability, and it is simple in structure, can realize the remote control of hydraulic system easily, automatic control, synchronous and the computer control of following feedback realizes complicated control program and telecontrol.
Description of drawings
Fig. 1 is the utility model example structure schematic representation;
Fig. 2 is the structural representation of stroking mechanism among Fig. 1;
Fig. 3 is a fundamental diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Reference character wherein is: Variable plunger pump main body 100, stroking mechanism 200, transmission shaft 1, cylinder body 2, swash plate 3, plunger 4, plunger piston slippery boots 41, control piston 5, feedback rod 6, feedback spring 7, valve core 8, valve pocket 9, pretensioned spring 10, proportion electro-magnet 11, control valve casing 12, feedback spring seat 13, pressure regulating seat 14, return spring 15, housing 16, bonnet 17.
As shown in Figure 1 to Figure 3, a kind of position-spring of the present utility model-force feedback type electricity rate variable axial piston pump, comprise Variable plunger pump main body 100 and the stroking mechanism 200 that is installed in Variable plunger pump main body 100 1 sides, described Variable plunger pump main body 100 comprises pump case and is fitted in pump case interior transmission shaft 1, cylinder body 2, swash plate 3, plunger 4 that wherein: stroking mechanism 200 comprises control piston 5, feedback rod 6, feedback spring 7, valve core 8, valve pocket 9, pretensioned spring 10 and proportion electro-magnet 11; Described control piston 5 is arranged in the pump case and with swash plate 3 and links, described feedback rod 6 one ends stretch in the pump case fixedlys connected with control piston 5, its the other end and feedback spring 7 cover press fits, described feedback spring 7, valve core 8, valve pocket 9, pretensioned spring 10 match and are installed in the control valve casing 12, form control valve; Described proportion electro-magnet 11 is placed in terminal and the moving by input current size control valve core 8 of control valve, described feedback rod 6 is by the displacement of feedback control piston 5, compressed feedback spring 7 becomes power and passes to valve core 8, forms direct position-spring-force feedback type control system.The utility model by Variable plunger pump 100, proportion electro-magnet 11, variable control valve, control piston 5, feedback rod 6, feedback spring 7, form a control system output flow of oil pump carried out accurate proportional control, thereby realize the different requirements of dosing pump delivery pressure and flow.Its working principle is: the moving of the change control valve heart 8 of proportion of utilization electromagnet current, make the big loculus of the oily entering variable piston in the control valve, thereby make the motion of variable piston side-to-side movement control swash plate 3, because control piston 7 cooperates interlock with swash plate 3, meanwhile be installed in the displacement of the feedback rod 6 feedback control pistons 5 on the control piston 7, give valve core 8 by compressed feedback spring 7 transmission power, make valve core 8 be on the new position, thereby realized the proportionate relationship near linearity of pump delivery with the input signal of input proportion electro-magnet.Realize the servocontrol of electromagnetic force, pump displacement by the form of position-spring-force feedback.
Among the embodiment, valve pocket 9 is fitted in the inner chamber of valve core 8, and described feedback spring 7, pretensioned spring 10 overlap the front-end and back-end that fit over valve pocket 9 respectively.Valve pocket 9 front ends fixedly are fitted with feedback spring seat 13, and described feedback spring 7 is sleeved on the feedback spring seat 13 and cooperates with feedback rod 6 roof pressures.
Among the embodiment, pretensioned spring 10 cooperates with valve pocket 9 suits through pressure regulating seat 14, and control piston 5 suits have been press-fitted return spring 15, and control piston 5 is articulated and connected with swash plate 3 and cooperates.
Pump case comprises equipped mutually housing 16 and bonnet 17, and the piston cavity of described control piston 5 is arranged in the bonnet 17.
The utility model drives the cylinder body rotation by transmission shaft, the plunger that is arranged in the cylinder body is rotated around the center transmission shaft line, plunger moves reciprocatingly in the cylinder body plunger cavity having under the pressuring action of swash plate at an inclination angle with transmission shaft, thereby finish the process of suction oil, Variable Control mechanism utilizes position-spring-force feedback principle design, displacement by the direct feedback control piston of the feedback rod that is installed on control piston, feedback rod becomes power by the compressed feedback spring and passes to valve core, valve core is on the new position, thereby has realized the proportionate relationship near linearity of pump delivery with the input signal of input proportion electro-magnet.The utility model control flexibly, be active in one's movements, repeatability is high and on the basis of traditional flow control, stroking mechanism is optimized, and has simplified hydraulic system significantly, can realize complicated control program, is convenient to realize telecontrol and remote control.
Most preferred embodiment of the present utility model is illustrated, and various variations or the remodeling made by those of ordinary skills can not break away from scope of the present utility model.
Claims (8)
1. a position-spring-force feedback type electricity rate variable axial piston pump, comprise Variable plunger pump main body (100) and be installed in the stroking mechanism (200) of Variable plunger pump main body (100) one sides, described Variable plunger pump main body (100) comprises pump case and is fitted in pump case interior transmission shaft (1), cylinder body (2), swash plate (3), plunger (4) that it is characterized in that: described stroking mechanism (200) comprises control piston (5), feedback rod (6), feedback spring (7), valve core (8), valve pocket (9), pretensioned spring (10) and proportion electro-magnet (11); Described control piston (5) is arranged in the pump case and with swash plate (3) and links, described feedback rod (6) one ends stretch in the pump case fixedlys connected with control piston (5), the press fit of its other end and feedback spring (7) cover, described feedback spring (7), valve core (8), valve pocket (9), pretensioned spring (10) match and are installed in the control valve casing (12), form control valve; Described proportion electro-magnet (11) is placed in terminal and the moving by input current size control valve core (8) of control valve, described feedback rod (6) is by the displacement of feedback control piston (5), compressed feedback spring (7) becomes power and passes to valve core (8), forms direct position-spring-force feedback type control system.
2. a kind of position-spring according to claim 1-force feedback type electricity rate variable axial piston pump, it is characterized in that: described valve pocket (9) is fitted in the inner chamber of valve core (8), and described feedback spring (7), pretensioned spring (10) overlap the front-end and back-end that fit over valve pocket (9) respectively.
3. a kind of position-spring according to claim 2-force feedback type electricity rate variable axial piston pump, it is characterized in that: described valve pocket (9) front end fixedly is fitted with feedback spring seat (13), and described feedback spring (7) is sleeved on feedback spring seat (13) and upward cooperates with feedback rod (6) roof pressure.
4. a kind of position-spring according to claim 3-force feedback type electricity rate variable axial piston pump, it is characterized in that: described pretensioned spring (10) cooperates with valve pocket (9) suit through pressure regulating seat (14).
5. a kind of position-spring according to claim 4-force feedback type electricity rate variable axial piston pump, it is characterized in that: described control piston (5) suit has been press-fitted return spring (15), and control piston (5) is articulated and connected with swash plate (3) and cooperates.
6. a kind of position-spring according to claim 5-force feedback type electricity rate variable axial piston pump, it is characterized in that: described pump case comprises equipped mutually housing (16) and bonnet (17), and the piston cavity of described control piston (5) is arranged in the bonnet (17).
7. a kind of position-spring according to claim 6-force feedback type electricity rate variable axial piston pump, it is characterized in that: described plunger (4) is fitted in the cylinder body (2), and matches with swash plate (3) by the equipped plunger piston slippery boots (41) of front end.
8. a kind of position-spring according to claim 7-force feedback type electricity rate variable axial piston pump, it is characterized in that: it is equipped mutually that described transmission shaft (1) passes housing (13), swash plate (3) and cylinder body (2) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205758126U CN201818451U (en) | 2010-10-21 | 2010-10-21 | Position-spring-force feedback-type electric proportional variable axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205758126U CN201818451U (en) | 2010-10-21 | 2010-10-21 | Position-spring-force feedback-type electric proportional variable axial plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN201818451U true CN201818451U (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205758126U Expired - Lifetime CN201818451U (en) | 2010-10-21 | 2010-10-21 | Position-spring-force feedback-type electric proportional variable axial plunger pump |
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| CN (1) | CN201818451U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956686A (en) * | 2010-10-21 | 2011-01-26 | 吴赛珍 | Position-spring-force feedback type electric proportional variable axial plunger pump |
| CN110748469A (en) * | 2019-10-30 | 2020-02-04 | 佛山市科达液压机械有限公司 | Control method and device of variable plunger pump and variable plunger pump |
-
2010
- 2010-10-21 CN CN2010205758126U patent/CN201818451U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956686A (en) * | 2010-10-21 | 2011-01-26 | 吴赛珍 | Position-spring-force feedback type electric proportional variable axial plunger pump |
| CN110748469A (en) * | 2019-10-30 | 2020-02-04 | 佛山市科达液压机械有限公司 | Control method and device of variable plunger pump and variable plunger pump |
| CN110748469B (en) * | 2019-10-30 | 2021-09-07 | 佛山市科达液压机械有限公司 | Control method and device of variable plunger pump and variable plunger pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110504 Effective date of abandoning: 20120502 |