CN204099146U - Hydraulic variable displacement pump - Google Patents
Hydraulic variable displacement pump Download PDFInfo
- Publication number
- CN204099146U CN204099146U CN201420385631.5U CN201420385631U CN204099146U CN 204099146 U CN204099146 U CN 204099146U CN 201420385631 U CN201420385631 U CN 201420385631U CN 204099146 U CN204099146 U CN 204099146U
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 51
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 4
- 102200068694 rs281865207 Human genes 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 102220246449 rs143520192 Human genes 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The utility model relates to a kind of hydraulic variable displacement pump, comprises housing and end cap, is provided with swash plate in housing, swash plate is connected with plunger, variable piston and resetting piston, end cap is provided with mounting hole and lower mounting hole; Oil hydraulic pump output circuit is connected with the feedback hydraulic fluid port of oil hydraulic pump by feedback control oil circuit, and feedback control oil circuit is provided with variable control valve; Described end cap is arranged huge discharge stop screw, large screw hole arranged outside has large screw hole black box, and large screw hole axis is coaxial with variable piston axis; Described end cap is provided with Screw hole, is provided with small displacement stop screw in Screw hole, Screw hole arranged outside has Screw bore seal assembly, Screw axially bored line and resetting piston axis coaxle.The utility model hydraulic variable displacement pump, structure is simple, has that operation is easy to adjust, manufacture cost is lower, this loop also has Variable Control pressure and manually to automatically switch under adjustable, safety pressure small flow, safe and reliable.
Description
Technical field
The utility model relates to a kind of hydraulic unit, specifically, relates to a kind of hydraulic variable displacement pump.
Background technique
The Variable Control mode of hydraulic variable displacement pump has a lot, as Non-follow control, Stress control, flow control, Electric Machine Control, servocontrol, proportional control etc., Variable Control mode for A10V Series Hydraulic variable displacement pump then comprises two control DG types, Stress control DR type (containing telecontrol DRG type), flow control DFR type, power control DFLR type, the flow control FHD type relevant with pilot pressure, the automatically controlled FE1 type of flow, the automatically controlled DFE1 of pressure flow, electro-hydraulic pressure control ED type, the Variable Control mode of L10V Series Hydraulic variable displacement pump comprises Stress control DR type (containing telecontrol DRG type), flow control DFR type, power control DFLR type.
Use variable displacement pump for needing and only need variable displacement pump to provide the hydraulic system of two grades of flows, its pumping source uses Non-follow control type operation adjust flux inconvenient, and use Electronic control (containing Electric Machine Control, proportional control etc.) and other control form costs higher, and cause use waste.
Model utility content
For above-mentioned deficiency of the prior art, the utility model provides a kind of structure simple, and it is convenient to control, the adjustable hydraulic variable displacement pump of safe and reliable output flow.
Technical solution adopted in the utility model is:
A kind of hydraulic variable displacement pump, comprise housing and end cap, be provided with swash plate in housing, swash plate is connected with plunger, variable piston and resetting piston, end cap is provided with mounting hole and lower mounting hole, upper mounting hole axis is coaxial with variable piston axis; Lower mounting hole axis and resetting piston axis coaxle; Oil hydraulic pump output circuit is connected with the feedback hydraulic fluid port of oil hydraulic pump by feedback control oil circuit, and feedback control oil circuit is provided with variable control valve; Described end cap is provided with large screw hole, is provided with huge discharge stop screw in large screw hole, large screw hole arranged outside has large screw hole black box, and large screw hole axis is coaxial with variable piston axis; Described end cap is provided with Screw hole, is provided with small displacement stop screw in Screw hole, Screw hole arranged outside has Screw bore seal assembly, Screw axially bored line and resetting piston axis coaxle.
Be set with return sleeve outside the piston rod of described resetting piston, return sleeve is stepped, and return sleeve right-hand member inserts in lower mounting hole; Return sleeve left end arranged outside has return spring.
Described variable piston is provided with center hole; Described variable piston right-hand member inserts in upper mounting hole; Huge discharge stop screw left end inserts variable piston center hole.
Described small displacement stop screw left end inserts from the right-hand member of return sleeve.
Described variable control valve is made up of control valve and safety valve.。
The beneficial effect of the utility model hinge structure:
The utility model hydraulic variable displacement pump, structure is simple, has that operation is easy to adjust, manufacture cost is lower, this loop also has Variable Control pressure and manually to automatically switch under adjustable, safety pressure small flow, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the huge discharge status architecture schematic diagram of the utility model hydraulic variable displacement pump;
Fig. 2 is the small displacement status architecture schematic diagram of the utility model hydraulic variable displacement pump;
Fig. 3 is the partial enlargement structural representation of Fig. 2;
Fig. 4 is the A-A sectional structure schematic diagram of Fig. 3;
Fig. 5 is the oil hydraulic circuit control principle drawing of the utility model hydraulic variable displacement pump.
Critical piece symbol description in accompanying drawing:
In figure:
1, main shaft 2, variable piston 3, piston rod 4, huge discharge stop screw
5, housing 6, modulating valve 7, end cap 8, small displacement stop screw
9, rotor 10, return spring 11, return sleeve 12, plunger
13, resetting piston 14, swash plate 15, control spool 16, control valve seat
17, control valve adjusting screw 18, safe spool 19, emergency valve seat
20, safety valve adjusting screw 21, large screw hole 22, Screw hole
23, large screw hole black box 24, Screw bore seal assembly
25, upper mounting hole 26, lower mounting hole
27, feed back hydraulic fluid port 28, oil hydraulic pump 29, pump hydraulic fluid port
30, vent line 31, feedback oil circuit 32, stop valve
33, control valve 34, control valve adjusting screw
35, safety valve adjusting screw 36, safety valve 37, inlet port.
Embodiment
Referring to drawings and Examples, the utility model is described in detail:
Accompanying drawing 1-5 is known, a kind of hydraulic variable displacement pump, comprises housing 5 and end cap 6, swash plate 14 is provided with in housing 5, swash plate 14 is connected with plunger 2, variable piston 2 and resetting piston 13, end cap 7 is provided with mounting hole 25 and lower mounting hole 26, upper mounting hole 25 axis and variable piston 2 axis coaxle; Lower mounting hole 26 axis and resetting piston 13 axis coaxle; Oil hydraulic pump output circuit is connected with the feedback hydraulic fluid port of oil hydraulic pump by feedback control oil circuit, and feedback control oil circuit is provided with variable control valve; Described end cap 7 is provided with large screw hole 21, is provided with huge discharge stop screw 4 in large screw hole 21, large screw hole 21 arranged outside has large screw hole black box 23, large screw hole 21 axis and variable piston 2 axis coaxle; Described end cap 7 is provided with Screw hole 22, is provided with small displacement stop screw 8 in Screw hole 22, Screw hole 22 arranged outside has Screw bore seal assembly 24, Screw hole 22 axis and resetting piston 13 axis coaxle.
Be set with return sleeve 11 outside the piston rod of described resetting piston, return sleeve 11 is stepped, and return sleeve 11 right-hand member inserts in lower mounting hole 26; Return sleeve 11 left end arranged outside has return spring 10.
Described variable piston 2 is provided with center hole; Described variable piston 2 right-hand member inserts in upper mounting hole; Huge discharge stop screw 4 left end inserts variable piston center hole.
Described small displacement stop screw 8 left end inserts from the right-hand member of return sleeve 11.
Described variable control valve is made up of control valve and safety valve.
Use variable displacement pump for needing and only need variable displacement pump to provide the hydraulic system of two grades of flows, its pumping source uses Non-follow control type operation adjust flux inconvenient, and use Electronic control (containing Electric Machine Control, proportional control etc.) and other control form costs higher, and cause use waste.The utility model hydraulic variable displacement pump, the volume adjustable hydraulic pump loop of self feed back oil pressure cntrol, mechanical position limitation can meet the demand of this hydraulic system, this loop is similar to two control DG types in A10V Series Hydraulic pump, all possesses easy to adjust, the lower-cost feature of operation, in addition, this loop also has Variable Control pressure and manually to automatically switch under adjustable, safety pressure the feature of small flow.For above-mentioned hydraulic system proposes one comparatively reasonably pumping source solution.
The utility model hydraulic variable displacement pump principle is as follows:
Adopt L10V or A10V Series Hydraulic pump, Variable Control mode selects flow control DFR type; Increase huge discharge stop screw at the tailpiece of the piston rod of variable displacement pump, carried out the stroke of dominated variable piston by mechanical position limitation, thus change swash plate pivot angle, the maximum pump discharge of adjustment variable displacement pump.Increase small displacement stop screw at return socket end, by the stroke of small displacement stop screw restriction resetting piston, make swash plate not be back to zero degree, thus the minimum injection rate of adjustment variable displacement pump; Under return spring effect, oil hydraulic pump original state is huge discharge; Control the feedback hydraulic fluid port of oil to oil hydraulic pump from oil hydraulic pump vent line Shang Yin mono-tunnel, the oil circuit control of drawing arranges a stop valve, is used for realizing switching on and off of oil circuit control; When oil circuit control is connected, oil hydraulic pump keeps the maximum pump discharge of original state; When oil circuit control disconnects, and when hydraulic pump outlet oil pressure is greater than the minimum pilot pressure of the setting controlling spool, oil hydraulic pump switches to minimum injection rate; When hydraulic pump outlet oil pressure reaches safety valve setting pressure, oil hydraulic pump switches to minimum injection rate; Can the minimum pilot pressure of regulator solution press pump variable by the adjusting screw of control valve, can the safety pressure of regulator solution press pump by the adjusting screw of safety valve; By regulating huge discharge stop screw can regulator solution press pump maximum pump discharge, by regulating small flow stop screw can regulator solution press pump minimum injection rate.
The volume adjustable hydraulic pump loop of self feed back oil pressure cntrol, mechanical position limitation is primarily of the composition such as pump main body (housing, end cap, main shaft, swash plate, rotor, plunger, variable piston, resetting piston etc.), huge discharge stop screw, small displacement stop screw, modulating valve (control valve, safety valve), stop valve, pipeline as shown in the figure.
The utility model hydraulic variable displacement pump working procedure is as follows:
Adopt L10V or A10V Series Hydraulic pump, Variable Control mode selects flow control DFR type.Control the feedback hydraulic fluid port (X) of oil to oil hydraulic pump on oil hydraulic pump vent line Shang Yin mono-tunnel, the oil circuit control of drawing arranges a stop valve (electronic or hand switch), is used for realizing switching on and off of oil circuit control.
Increase huge discharge stop screw at the tailpiece of the piston rod of variable displacement pump, carried out the stroke of dominated variable piston by mechanical position limitation, thus change swash plate pivot angle, the maximum pump discharge of adjustment variable displacement pump.Small displacement stop screw is increased at return socket end, when oil circuit control disconnects or when variable displacement pump reaches safety valve setting pressure, by the stroke of small displacement stop screw restriction resetting piston, swash plate is made not to be back to zero degree, thus the minimum injection rate of adjustment variable displacement pump.Under return spring effect, variable displacement pump original state is huge discharge state (huge discharge stop screw withstands variable piston).
When oil circuit control is connected, hydraulic pump outlet pressure oil acts on and controls the two ends of spool, and under the effect of return spring and resetting piston, swash plate keeps initial huge discharge state; When oil circuit control disconnects, hydraulic pump outlet pressure oil acts on the left side controlling spool, when oil pressure active force is greater than control valve seat acting force of the spring, control spool moves to right, pressure oil enters in oil hydraulic pump variable piston, act on variable piston, promote swash plate to the direction motion that discharge capacity reduces, until small displacement stop screw place.
When hydraulic pump outlet oil pressure active force reaches emergency valve seat acting force of the spring, safe spool moves to right, and pressure oil enters in oil hydraulic pump variable piston, acts on variable piston, promotes swash plate and reduces direction motion, until small displacement stop screw place to discharge capacity.
Can the minimum pilot pressure (general >=2.5MPa) of regulable control oil hydraulic pump variable by the adjusting screw of adjusting control valve, can the safety cut-off pressure (general≤28MPa) of regulator solution press pump by the adjusting screw of regulation safety valve.
By regulating large discharge stop screw can regulator solution press pump maximum pump discharge (setting range is generally from Vgmax to 50%Vgmax), by regulating small flow stop screw can regulator solution press pump minimum injection rate (setting range is generally from Vgmin to 50%Vgmax); Note: Vgmax represents maximum pump discharge, Vgmin represents minimum injection rate.
Claims (5)
1. a hydraulic variable displacement pump, comprise housing and end cap, in housing, be provided with swash plate, swash plate is connected with plunger, variable piston and resetting piston, it is characterized in that: end cap is provided with mounting hole and lower mounting hole, upper mounting hole axis is coaxial with variable piston axis; Lower mounting hole axis and resetting piston axis coaxle; Oil hydraulic pump output circuit is connected with the feedback hydraulic fluid port of oil hydraulic pump by feedback control oil circuit, and feedback control oil circuit is provided with variable control valve; Described end cap is provided with large screw hole, is provided with huge discharge stop screw in large screw hole, large screw hole arranged outside has large screw hole black box, and large screw hole axis is coaxial with variable piston axis; Described end cap is provided with Screw hole, is provided with small displacement stop screw in Screw hole, Screw hole arranged outside has Screw bore seal assembly, Screw axially bored line and resetting piston axis coaxle.
2. hydraulic variable displacement pump according to claim 1, it is characterized in that: be set with return sleeve outside the piston rod of described resetting piston, return sleeve is stepped, and return sleeve right-hand member inserts in lower mounting hole; Return sleeve left end arranged outside has return spring.
3. hydraulic variable displacement pump according to claim 1, is characterized in that: described variable piston is provided with center hole; Described variable piston right-hand member inserts in upper mounting hole; Huge discharge stop screw left end inserts variable piston center hole.
4. hydraulic variable displacement pump according to claim 1, is characterized in that: described small displacement stop screw left end inserts from the right-hand member of return sleeve.
5. hydraulic variable displacement pump according to claim 1, is characterized in that: described variable control valve is made up of control valve and safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385631.5U CN204099146U (en) | 2014-07-11 | 2014-07-11 | Hydraulic variable displacement pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385631.5U CN204099146U (en) | 2014-07-11 | 2014-07-11 | Hydraulic variable displacement pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204099146U true CN204099146U (en) | 2015-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420385631.5U Expired - Lifetime CN204099146U (en) | 2014-07-11 | 2014-07-11 | Hydraulic variable displacement pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204099146U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533886A (en) * | 2015-01-16 | 2015-04-22 | 北京理工大学 | Non-load starting device and method for variable hydraulic pump |
| CN106194680A (en) * | 2016-08-28 | 2016-12-07 | 中航力源液压股份有限公司 | The axial plunger pump installation of a kind of high accuracy electric proportional control and control method |
| CN106837733A (en) * | 2017-03-01 | 2017-06-13 | 北京航空航天大学 | A kind of new change displacement hydraulic pump |
| CN112610437A (en) * | 2020-12-25 | 2021-04-06 | 中国船舶重工集团公司第七0三研究所 | Gas turbine plunger pump |
| CN113454338A (en) * | 2019-02-25 | 2021-09-28 | 圣康丁昂伊夫利纳凡尔赛大学 | Hydraulic actuator with overpressure compensation |
| CN114962201A (en) * | 2022-05-23 | 2022-08-30 | 中航力源液压股份有限公司 | Compact type aviation hydraulic variable pump swash plate variable mechanism and method |
-
2014
- 2014-07-11 CN CN201420385631.5U patent/CN204099146U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533886A (en) * | 2015-01-16 | 2015-04-22 | 北京理工大学 | Non-load starting device and method for variable hydraulic pump |
| CN106194680A (en) * | 2016-08-28 | 2016-12-07 | 中航力源液压股份有限公司 | The axial plunger pump installation of a kind of high accuracy electric proportional control and control method |
| CN106194680B (en) * | 2016-08-28 | 2018-02-06 | 中航力源液压股份有限公司 | The axial plunger pump installation and control method of a kind of high-precision electric proportional control |
| CN106837733A (en) * | 2017-03-01 | 2017-06-13 | 北京航空航天大学 | A kind of new change displacement hydraulic pump |
| CN106837733B (en) * | 2017-03-01 | 2018-08-07 | 北京航空航天大学 | A kind of change displacement hydraulic pump |
| CN113454338A (en) * | 2019-02-25 | 2021-09-28 | 圣康丁昂伊夫利纳凡尔赛大学 | Hydraulic actuator with overpressure compensation |
| CN112610437A (en) * | 2020-12-25 | 2021-04-06 | 中国船舶重工集团公司第七0三研究所 | Gas turbine plunger pump |
| CN114962201A (en) * | 2022-05-23 | 2022-08-30 | 中航力源液压股份有限公司 | Compact type aviation hydraulic variable pump swash plate variable mechanism and method |
| CN114962201B (en) * | 2022-05-23 | 2023-08-08 | 中航力源液压股份有限公司 | Compact type aviation hydraulic variable pump swash plate variable mechanism and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150114 |
|
| CX01 | Expiry of patent term |