CN201972916U - Constant-pressure control valve for axial plunger piston pump - Google Patents
Constant-pressure control valve for axial plunger piston pump Download PDFInfo
- Publication number
- CN201972916U CN201972916U CN201120074222XU CN201120074222U CN201972916U CN 201972916 U CN201972916 U CN 201972916U CN 201120074222X U CN201120074222X U CN 201120074222XU CN 201120074222 U CN201120074222 U CN 201120074222U CN 201972916 U CN201972916 U CN 201972916U
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- Prior art keywords
- opening
- piston pump
- spool
- control valve
- mouthful
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a constant-pressure control valve for an axial plunger piston pump. A passage provided with a valve core is arranged in a valve body, the left end of the valve core is provided with a hole communicated with the passage, the right end part of the valve core is propped and arranged on a spring seat, a spring is arranged on the spring seat, the right side of the spring is provided with a gasket connected with a regulation screw rod, a first opening, a second opening and a third opening are sequentially arranged on the passage from the left side to the right side, the first opening is connected with an oil outlet of the axial plunger piston pump, the second opening is connected with a large-end oil cavity of a control piston of the plunger piston pump, the third opening is connected with a leakage oil opening of the plunger piston, a damping oil passage is arranged between the second opening and the third opening, and a damping screw plug is arranged on the damping oil passage. The constant-pressure control valve has the advantages that the structure is reasonable, the process is simple, the regulation is convenient, the universality is strong, and the pressure is constant and stable.
Description
Technical field
The utility model relates to a kind of axial piston pump constant voltage control valve.
Background technique
The constant voltage control valve, be in the regulation range of pump, to make system keep constant compression force, after the pilot pressure of pump was set by the constant pressure valve of pump, when reaching the pressure of setting in system, it only was to keep the required discharge capacity of this system pressure that pump delivery is adjusted to down rapidly automatically.Conventional pump is regulated inconvenience with the constant voltage control valve, and complex process, versatility are not strong, and service behaviour is undesirable.
Summary of the invention
The purpose of this utility model is to provide axial piston pump constant voltage control valve a kind of rational in infrastructure, easy to adjust, good working effect.
Technical solution of the present utility model is:
A kind of axial piston pump constant voltage control valve, it is characterized in that: comprise valve body, establish the passage that spool is housed in the valve body, the spool left end is provided with the hole that communicates with described passage, top, spool right part is contained on the spring seat, spring is housed on the spring seat, the pad that spring right side dress is connected with adjusting screw rod, be provided with first mouthful that connects the axial piston pump oil outlet on the described passage from left to right successively, connect second mouthful of the big end oil pocket of plunger pump control piston and connect plunger pump and leak the 3rd mouthful of hydraulic fluid port, between second mouthful and the 3rd mouthful, be provided with the damping oil duct, on the damping oil duct, be provided with the damping plug screw.
The left end of described passage is provided with the internal thread that cooperates with plug screw.
The right-hand member of spool is tapered, and the spring seat position that contacts with spool is corresponding taper hole form.
The utility model is rational in infrastructure, and technology is simple, easy to adjust, highly versatile, constant voltage stable.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is an embodiment's of the utility model a structural representation.
Embodiment
A kind of axial piston pump constant voltage control valve, comprise valve body 1, establish the path 10 that spool 2 is housed in the valve body, the spool left end is provided with the hole 11 that communicates with described path 10, top, spool right part is contained on the spring seat 4, bullet 5 is housed on the spring seat, the pad 7 that spring right side dress is connected with adjusting screw rod 8, be provided with first mouthful (P mouth) connecing the axial piston pump oil outlet on the described passage from left to right successively, connect second mouthful (A mouth) of the big end oil pocket of plunger pump control piston and connect the 3rd mouthful (the T mouth) that plunger pump leaks hydraulic fluid port, between second mouthful and the 3rd mouthful, be provided with the damping oil duct, on the damping oil duct, be provided with damping plug screw 3.
The left end of described passage is provided with the internal thread that cooperates with plug screw.
The right-hand member of spool is tapered, and the spring seat position that contacts with spool is corresponding taper hole form.Also have spring housing 6, nut 9 among the figure.
During work, act on the oil pressure in spool left side and the spring force on spool right side and balance each other, thereby make the P mouth pressure constant, the P mouth pressure acts on axial piston pump variable piston by the opening of spool through the A mouth, change oil pump swash plate drift angle, it is required to make flow keep system.
Claims (3)
1. axial piston pump constant voltage control valve, it is characterized in that: comprise valve body, establish the passage that spool is housed in the valve body, the spool left end is provided with the hole that communicates with described passage, top, spool right part is contained on the spring seat, spring is housed on the spring seat, the pad that spring right side dress is connected with adjusting screw rod, be provided with first mouthful that connects the axial piston pump oil outlet on the described passage from left to right successively, connect second mouthful of the big end oil pocket of plunger pump control piston and connect plunger pump and leak the 3rd mouthful of hydraulic fluid port, between second mouthful and the 3rd mouthful, be provided with the damping oil duct, on the damping oil duct, be provided with the damping plug screw.
2. axial piston pump constant voltage control valve according to claim 1, it is characterized in that: the left end of described passage is provided with the internal thread that cooperates with plug screw.
3. axial piston pump constant voltage control valve according to claim 1, it is characterized in that: the right-hand member of spool is tapered, and the spring seat position that contacts with spool is corresponding taper hole form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120074222XU CN201972916U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure control valve for axial plunger piston pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120074222XU CN201972916U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure control valve for axial plunger piston pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201972916U true CN201972916U (en) | 2011-09-14 |
Family
ID=44578021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120074222XU Expired - Fee Related CN201972916U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure control valve for axial plunger piston pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201972916U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405710A (en) * | 2014-11-14 | 2015-03-11 | 重庆红江机械有限责任公司 | Constant pressure valve for controlling pressure and flow of variable plunger pump |
| WO2015074167A1 (en) * | 2013-11-20 | 2015-05-28 | 江苏恒立液压有限公司 | Plunger pump power control device and control method thereof |
| CN105351163A (en) * | 2015-10-26 | 2016-02-24 | 江苏恒立液压有限公司 | Axial plunger pump torque control device and control method thereof |
| CN110285048A (en) * | 2019-07-19 | 2019-09-27 | 宁波克泰液压有限公司 | Screw thread inserting type speed sensitive load control valve |
| CN115122145A (en) * | 2022-05-30 | 2022-09-30 | 宁波雪隆王液压科技有限公司 | Constant-pressure switch valve and machining center cleaning system |
-
2011
- 2011-03-21 CN CN201120074222XU patent/CN201972916U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015074167A1 (en) * | 2013-11-20 | 2015-05-28 | 江苏恒立液压有限公司 | Plunger pump power control device and control method thereof |
| CN104405710A (en) * | 2014-11-14 | 2015-03-11 | 重庆红江机械有限责任公司 | Constant pressure valve for controlling pressure and flow of variable plunger pump |
| CN105351163A (en) * | 2015-10-26 | 2016-02-24 | 江苏恒立液压有限公司 | Axial plunger pump torque control device and control method thereof |
| CN110285048A (en) * | 2019-07-19 | 2019-09-27 | 宁波克泰液压有限公司 | Screw thread inserting type speed sensitive load control valve |
| CN110285048B (en) * | 2019-07-19 | 2024-03-19 | 宁波克泰液压有限公司 | Screw thread plug-in type speed sensitive load control valve |
| CN115122145A (en) * | 2022-05-30 | 2022-09-30 | 宁波雪隆王液压科技有限公司 | Constant-pressure switch valve and machining center cleaning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20160321 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |