CN203627179U - Power control device of plunger pump - Google Patents
Power control device of plunger pump Download PDFInfo
- Publication number
- CN203627179U CN203627179U CN201320740091.3U CN201320740091U CN203627179U CN 203627179 U CN203627179 U CN 203627179U CN 201320740091 U CN201320740091 U CN 201320740091U CN 203627179 U CN203627179 U CN 203627179U
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- valve
- spool
- valve body
- valve pocket
- plunger pump
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Abstract
The utility model relates to a power control device of a plunger pump. The power control device of the plunger pump is provided with a control valve body, a valve element, a valve sleeve, a stop threaded plug, a spring preloading mechanism, a feedback mechanism and a sliding valve. An oil inlet P, an oil outlet Ps and two oil draining ports T are formed in the control valve body. The valve element is arranged in the valve sleeve, the valve sleeve and the valve element form a three-position two-way structure valve, a cavity E is formed between the valve sleeve and the valve element, and the cavity E is communicated to the oil inlet P. The sliding valve is arranged on the central part of one end of the valve element, the sliding valve and the valve element form a cavity C in the radial direction of the valve element, and the round ball end of the sliding valve makes contact with the stop threaded plug. The stop threaded plug is arranged at one end of the control valve body. The spring preloading mechanism is arranged at the other end of the control valve body. The valve sleeve, the valve element and the sliding valve are arranged between the stop threaded plug and the spring preloading mechanism. The feedback mechanism is hinged to the control valve body. The power control device of the plunger pump enables the hydraulic plunger pump to control the output power, the power output curve of the pump is simulated by the adoption of two folded lines, and the error is small; variable loading of the valve element is flexible through the pressure of the cavity C.
Description
Technical field
The utility model relates to machinery manufacturing technology field, particularly a kind of power of plunger pump control gear.
Background technique
Power control is the common control mode of oil hydraulic pump, is characterized in certain range of working pressure, makes the output power of pump constant, both W=PQ by power control.This kind of control is pump discharge pressure oil is regulated to entering variable piston by output control device or by output control device, the pressure oil of variable piston is laid down, move to realize pump displacement variation to promote servopiston, when moving, variable piston drive again the feedback rod of output control device oppositely to move, after closing to output control device adjusting, pump variable process completes.
Fig. 1 is a kind of power control that is subject to intellectual property protection being commercially available; in this kind of output control device, include spool, the valve pockets of 32 logical valve arrangement functions, carry out in power ratio control control gear P import with outlet Ps or connect with drain tap T by the movement of spool, valve pocket.Spool is set to have the structure of step type, sees detailed view I, and its A place is different with the diameter at B place, is respectively φ d and φ D, the middle pressure chamber of introducing, and the power that acts on spool because of the difference in areas of two diameters is F=p π (D
2-d
2)/4, the other end is provided with spring-feel mechanism, oppositely preload force.Feedback rod fixed hinge rotates on valve body, and one end links with valve pocket, and opening is left in one end in addition, can be connected with variable piston, and its function is lever principle, makes the movement of variable piston contrary with valve pocket movement direction, to realize machine feedback process.
32 logical valve fit diameter that form because of valve pocket and the spool of this kind of structure are 2 different diameters, and the coaxality between the cylindricity to valve pocket and spool and two stepped diameters etc. is had relatively high expectations, and difficulty of processing is large, and batch production cost is higher.Valve pocket and spool because of the coaxial error of two stepped diameters be separately objective reality, therefore there will be the phenomenon of variable jam.
Model utility content
The purpose of this utility model is to overcome the defect that prior art exists, and provides a kind of simple in structure, and part difficulty of processing is low, and batch process cost is low, error is less, variable a kind of power of plunger pump control gear flexibly.
The technological scheme that realizes the utility model object is: a kind of power of plunger pump control gear, has control valve body, spool, valve pocket, stop screw plug, springs preload mechanism and feedback mechanism; Described control valve body is provided with oil inlet P, oil outlet Ps and 2 drain tap T; The variable piston cavity of the external pump housing of described oil outlet Ps; Described spool is arranged in valve pocket, forms E chamber between valve pocket and spool, the long logical oil inlet P in E chamber; Described stop screw plug is arranged on one end of control valve body; Described springs preload mechanism is arranged on the other end of control valve body; Described valve pocket is arranged between stop screw plug and springs preload mechanism, and valve pocket and spool form 32 logical structure valves, form E chamber between valve pocket and spool, the long logical oil inlet P in E chamber; Described feedback mechanism hinge is on control valve body; One end and valve pocket join, and drive valve pocket to move vertically, and one end is connected with variable piston in addition; Center portion, described spool one end is provided with guiding valve, and guiding valve and valve core chamber are provided with pressure chamber C, and guiding valve is close on stop screw plug by C cavity pressure; The ball end of described guiding valve contacts with stop screw plug; Between described stop screw plug and valve pocket, by a drain tap T draining, valve pocket and springs preload are inter-agency by another drain tap T draining.
The main existence because of guiding valve of the suffered hydraulic coupling of spool described in technique scheme, hydraulic coupling is F=p π d
2/ 4, d is guiding valve diameter.
Perpendicularity described in technique scheme between plane and the guiding valve axis of the nearly spool of stop screw plug is in 0.05mm;
Described in technique scheme, in output control device, stop screw plug and valve pocket, valve core chamber are by a drain tap T draining, and valve pocket and springs preload are inter-agency by another drain tap T draining.
Described in technique scheme, springs preload mechanism comprises the first spring seat, big spring, little spring, the second spring seat, swivel nut and nut; On described swivel nut, have the groove that cross section is inverted "convex" shape, swivel nut is screwed into control valve body, and is fixed on one end of control valve body by nut; Described the first spring seat and the second spring seat are oppositely arranged in groove, between the first spring seat and the second spring seat, are provided with little spring and big spring; Described little spring is arranged in big spring.
Described in technique scheme, springs preload mechanism also has adjusting screw; One end of described adjusting screw is screwed into swivel nut and contacts with the second spring seat.
A controlling method for power of plunger pump control gear, concrete steps are as follows:
1. the numerical value of setting spring pre-load mechanism;
2. introduce pump discharge pressure oil from oil inlet P, enter in the C chamber between spool and guiding valve by E cavity, pump discharge pressure oil promotes guiding valve and spool moves round about, guiding valve is stopped at stop screw plug, spool moves to Compress Spring pre-load mechanism, or oil inlet P pressure decreased, springs preload mechanism urges spool overcomes the effect of C cavity pressure and oppositely moves;
3. carry out binary conversion treatment, complete that pump boosts or the variable process of step-down.
Described in technique scheme, step detailed process is 3.: in the time introducing the pump discharge pressure in C chamber and increase and exceed the numerical value that springs preload mechanism 5 sets, spool 2 moves to Compress Spring pre-load mechanism 5 directions, move to oil inlet P, E chamber and oil outlet Ps connect, when oil outlet Ps and drain tap T disconnect, pressure oil is by oil outlet Ps entering variable piston cavity, promoting variable piston moves to the little pivot angle of plunger pump, simultaneously, feedback mechanism 6 drives valve pocket 3 to move to closing direction, to oil inlet P and oil outlet Ps disconnection, when oil outlet Ps and drain tap T connect, the pressure oil of variable piston starts to be laid down, make it move and stop and moving to plunger pump big swing angle to little pivot angle direction, simultaneously, feedback mechanism 6 drives valve pocket 3 to move to the opposite direction of variable piston movement, again connect to oil inlet P and oil outlet Ps, above-mentioned two processes hocket, make variable piston in small pulsation, now, the pump variable process of boosting completes,
When introduce C chamber pump discharge pressure reduce and set lower than springs preload mechanism 5 numerical value time, oil inlet P, E chamber and oil outlet Ps disconnection, oil outlet Ps and drain tap T connect, variable piston moves to plunger pump big swing angle, simultaneously, feedback mechanism 6 drives valve pocket 3 to move to the opposite direction of variable piston movement, to oil inlet P and oil outlet Ps connect, oil outlet Ps is during with drain tap T disconnection, pressure oil stop variable piston moves and the anti-variable piston that pushes away moves to the little pivot angle of plunger pump, above-mentioned two processes hocket, and make variable piston in small pulsation; Now, pump variable step-down process completes.
Adopt after technique scheme, the utlity model has following positive effect:
(1) power control mode that the utility model is mentioned and device can be realized the control of hydraulic planger pump to output power, and the power stage curve of pump is simulated with two broken lines, and error is less; Simple in structure, part difficulty of processing is low, and batch process cost is low.Valve variable is flexible, and Variable Control stability is high.
(2) between the plane of the close spool of stop screw plug of the present utility model and the axis of guiding valve, there is perpendicularity requirement, can avoid guiding valve to be subject to radial force.
Accompanying drawing explanation
For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is traditional output control device structural representation;
Fig. 2 is the enlarged diagram at I place in Fig. 1;
Fig. 3 is structural representation of the present utility model;
Fig. 4 is the enlarged diagram at II place in Fig. 3;
Fig. 5 is schematic diagram of the present utility model;
Fig. 6 is actual power output curve diagram of the present utility model;
Attached number in the figure is: control valve body 1, spool 2, valve pocket 3, stop screw plug 4, springs preload mechanism 5, the first spring seat 51, big spring 52, little spring 53, the second spring seat 54, swivel nut 55, nut 56, adjusting screw 57, feedback mechanism 6, guiding valve 7.
Embodiment
(embodiment 1, a kind of power of plunger pump control gear)
See Fig. 3 to Fig. 5, a kind of power of plunger pump control gear, has control valve body 1, spool 2, valve pocket 3, stop screw plug 4, springs preload mechanism 5, feedback mechanism 6 and guiding valve 7; Control valve body 1 is provided with oil inlet P, oil outlet Ps and 2 drain tap T; The variable piston cavity of the external pump housing of oil outlet Ps; Spool 2 is arranged in valve pocket 3, and valve pocket 3 forms 32 logical structure valves with spool 2, between valve pocket 3 and spool 2, forms E chamber; Guiding valve 7 is arranged on spool 2 one end central parts, and guiding valve 7 upwards forms C chamber with spool 2 in spool 2 footpaths, and the ball end of guiding valve 7 contacts with stop screw plug 4; Stop screw plug 4 is arranged on one end of control valve body 1; Springs preload mechanism 5 is arranged on the other end of control valve body 1; Valve pocket 3, spool 2, guiding valve 7 are arranged between stop screw plug 4 and springs preload mechanism 5; Feedback mechanism 6 hinges, on control valve body 1, rotate around joint pin, and one end drives valve pocket 3 to move along axis by sliding pair structure, and one end also links with variable piston by sliding pair structure in addition, moves along axis with variable piston.
Perpendicularity between plane and guiding valve 7 axis of stop screw plug 4 nearly spools 2 is in 0.05mm, avoids guiding valve 7 to be subject to radial force.
Output control device has 2 drain tap T, is provided with a drain tap T between stop screw plug and valve pocket, and valve pocket and springs preload be inter-agency is provided with a drain tap T.
(embodiment 2, a kind of controlling method of power of plunger pump control gear)
A controlling method for power of plunger pump control gear, concrete steps are as follows:
1. the numerical value of setting spring pre-load mechanism 5;
2. introduce pump discharge pressure oil from oil inlet P, enter in the C chamber of spool 2 by valve pocket 3, pump discharge pressure oil promotes guiding valve 7 and spool 2 moves round about, and guiding valve is stopped at stop screw plug, and spool moves to Compress Spring pre-load mechanism; Or oil inlet P pressure decreased, springs preload mechanism urges spool overcomes the effect of C cavity pressure and oppositely moves;
3. carry out binary conversion treatment, in the time introducing the pump discharge pressure in C chamber and increase and exceed the numerical value that springs preload mechanism 5 sets, spool 2 moves to Compress Spring pre-load mechanism 5 directions, move to oil inlet P, E chamber and oil outlet Ps connect, when oil outlet Ps and drain tap T disconnect, pressure oil is by oil outlet Ps entering variable piston cavity, promoting variable piston moves to the little pivot angle of plunger pump, simultaneously, feedback mechanism 6 drives valve pocket 3 to move to closing direction, disconnected to oil inlet P and oil outlet Ps, when oil outlet Ps and drain tap T connect, the pressure oil of variable piston starts to be laid down, make it move and stop and moving to plunger pump big swing angle to little pivot angle direction, simultaneously, feedback mechanism 6 drives valve pocket 3 to move to the opposite direction of variable piston movement, again connect to oil inlet P and oil outlet Ps, above-mentioned two processes hocket, make variable piston in small pulsation, now, the pump variable process of boosting completes,
When introduce C chamber pump discharge pressure reduce and set lower than springs preload mechanism 5 numerical value time, oil inlet P, E chamber and oil outlet Ps disconnection, oil outlet Ps and drain tap T connect, variable piston moves to plunger pump big swing angle, simultaneously, feedback mechanism 6 drives valve pocket 3 to move to the opposite direction of variable piston movement, to oil inlet P and oil outlet Ps connect, oil outlet Ps is during with drain tap T disconnection, pressure oil stop variable piston moves and the anti-variable piston that pushes away moves to the little pivot angle of plunger pump, above-mentioned two processes hocket, and make variable piston in small pulsation; Now, pump variable step-down process completes.
See Fig. 6, the real output curve on hydraulic planger pump replaces theoretical curve by 2 broken lines, and error is in 3%.
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. a power of plunger pump control gear, has control valve body (1), spool (2), valve pocket (3), stop screw plug (4), springs preload mechanism (5) and feedback mechanism (6); Described control valve body (1) is provided with oil inlet P, oil outlet Ps and 2 drain tap T; The variable piston cavity of the external pump housing of described oil outlet Ps; Described spool (2) is arranged in valve pocket (3), between valve pocket (3) and spool (2), forms E chamber, the long logical oil inlet P in E chamber; Described stop screw plug (4) is arranged on one end of control valve body (1); Described springs preload mechanism (5) is arranged on the other end of control valve body (1); Described spool (2) and valve pocket (3) are arranged between stop screw plug (4) and springs preload mechanism (5), and valve pocket (3) forms 32 logical structure valves with spool (2); Described feedback mechanism (6) hinge is upper at control valve body (1), and one end and valve pocket (3) join, and drives valve pocket (3) to move vertically, and one end is connected with variable piston in addition; It is characterized in that: described spool (2) center portion, one end is provided with guiding valve (7), between guiding valve (7) and spool (2), be provided with pressure chamber C, guiding valve (7) is close on stop screw plug (4) by C cavity pressure; The ball end of described guiding valve (7) contacts with stop screw plug (4); Between described stop screw plug (4) and valve pocket (3), by a drain tap T draining, between valve pocket (3) and springs preload mechanism (5), pass through another drain tap T draining.
2. power of plunger pump control gear according to claim 1, is characterized in that: the perpendicularity between plane and guiding valve (7) axis of the nearly spool (2) of described stop screw plug (4) is in 0.05mm.
3. power of plunger pump control gear according to claim 2, is characterized in that: described springs preload mechanism (5) comprises the first spring seat (51), big spring (52), little spring (53), the second spring seat (54), swivel nut (55) and nut (56); Described swivel nut has the groove that cross section is inverted "convex" shape on (55), and swivel nut (55) is screwed into control valve body (1), and is fixed on one end of control valve body (1) by nut (56); Described the first spring seat (51) is oppositely arranged in groove with the second spring seat (54), is provided with little spring (53) and big spring (54) between the first spring seat (51) and the second spring seat (52); Described little spring (53) is arranged in big spring (54).
4. power of plunger pump control gear according to claim 3, is characterized in that: described springs preload mechanism (5) also has adjusting screw (57); One end of described adjusting screw (57) is screwed into swivel nut (55) and contacts with the second spring seat (54).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320740091.3U CN203627179U (en) | 2013-11-20 | 2013-11-20 | Power control device of plunger pump |
| JP2015561878A JP6105759B2 (en) | 2013-11-20 | 2013-12-02 | Piston pump power control device and control method thereof |
| EP13897807.7A EP2944818B1 (en) | 2013-11-20 | 2013-12-02 | Plunger pump power control device and control method thereof |
| PCT/CN2013/001488 WO2015074167A1 (en) | 2013-11-20 | 2013-12-02 | Plunger pump power control device and control method thereof |
| US14/818,333 US20150345491A1 (en) | 2013-11-20 | 2015-08-05 | Plunger pump power control device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320740091.3U CN203627179U (en) | 2013-11-20 | 2013-11-20 | Power control device of plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627179U true CN203627179U (en) | 2014-06-04 |
Family
ID=50813664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320740091.3U Withdrawn - After Issue CN203627179U (en) | 2013-11-20 | 2013-11-20 | Power control device of plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203627179U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234992A (en) * | 2013-11-20 | 2014-12-24 | 江苏恒立液压有限公司 | Plunger pump power control device and control method thereof |
| CN112628100A (en) * | 2020-11-16 | 2021-04-09 | 中国航发西安动力控制科技有限公司 | Swash plate swing angle limiting mechanism of plunger pump |
| CN113915091A (en) * | 2021-09-28 | 2022-01-11 | 徐州重型机械有限公司 | Plunger pump variable mechanism, plunger pump control system and pump control method |
-
2013
- 2013-11-20 CN CN201320740091.3U patent/CN203627179U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234992A (en) * | 2013-11-20 | 2014-12-24 | 江苏恒立液压有限公司 | Plunger pump power control device and control method thereof |
| CN104234992B (en) * | 2013-11-20 | 2016-08-17 | 江苏恒立液压有限公司 | A kind of power of plunger pump controls device and control method thereof |
| CN112628100A (en) * | 2020-11-16 | 2021-04-09 | 中国航发西安动力控制科技有限公司 | Swash plate swing angle limiting mechanism of plunger pump |
| CN113915091A (en) * | 2021-09-28 | 2022-01-11 | 徐州重型机械有限公司 | Plunger pump variable mechanism, plunger pump control system and pump control method |
| CN113915091B (en) * | 2021-09-28 | 2023-10-03 | 徐州重型机械有限公司 | Plunger pump variable mechanism, plunger pump control system and plunger pump control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Patentee after: JIANGSU HENGLI HYDRAULIC CO., LTD. Address before: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Patentee before: JIANGSU HENGLI HYDRAULIC CO., LTD. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |