CN201982265U - Grading variable axial plunger pump - Google Patents
Grading variable axial plunger pump Download PDFInfo
- Publication number
- CN201982265U CN201982265U CN2011200742215U CN201120074221U CN201982265U CN 201982265 U CN201982265 U CN 201982265U CN 2011200742215 U CN2011200742215 U CN 2011200742215U CN 201120074221 U CN201120074221 U CN 201120074221U CN 201982265 U CN201982265 U CN 201982265U
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- piston
- variable
- axial
- main body
- pump main
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Abstract
The utility model discloses a grading variable axial plunger pump, which consists of a constant pressure control valve and an axial plunger oil pump body, wherein the constant pressure control valve comprises a valve body, a channel containing a valve core is arranged in the valve body, the left end of the valve core is provided with a hole communicated with the channel, the right end of the valve core is propped on a spring seat, the spring seat is provided with a spring, the right side of the spring is provided with a gasket connected with an adjusting screw rod, the channel is sequentially provided with a first mouth connected with an oil outlet of the axial plunger pump body, a second mouth connected with a large-end oil chamber of a control piston of the axial plunger pump body, and a third mouth connected with an oil leakage mouth of the axial plunger pump body, a damping oil duct is arranged between the second mouth and the third mouth, and the damping oil duct is provided with a damping screw plug; and an emission limit screw limiting the moving distance of the piston is arranged in a piston small chamber of the axial plunger oil pump body. The grading variable axial plunger pump has a reasonable structure, a simple process, strong generality and stable constant pressure, and is convenient to adjust.
Description
Technical field
The utility model relates to a kind of deciding grade and level axial variable displacement plunger pump.
Background technique
The deciding grade and level axial variable displacement plunger pump is a kind of high low pressure unipump, when system pressure less than at the pressure of setting the time, the float amount output of pump.Existing deciding grade and level axial variable displacement plunger pump pressure conversion setting range is little, and generally between 3 ~ 4Mpa, PIP and high pressure flow are set inconvenience, and service behaviour is undesirable.
Summary of the invention
It is a kind of rational in infrastructure that the purpose of this utility model is to provide, the deciding grade and level axial variable displacement plunger pump that the PIP setting range is wide, easy to adjust.
Technical solution of the present utility model is:
A kind of deciding grade and level axial variable displacement plunger pump is characterized in that: be made up of constant voltage control valve and axial plunger oil pump main body; Wherein the constant voltage control valve comprises 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 of connecing axial piston pump main body oil outlet on the described passage from left to right successively, connect second mouthful of the big end oil pocket of axial piston pump main body control piston and connect the axial piston pump main body 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; Described axial piston pump main body comprises housing parts, housing parts is provided with the axial piston pump main body and leaks hydraulic fluid port and axial piston pump main body oil outlet, housing parts is connected with variable shell, variable shell is connected with upper and lower flange, piston cavity is set in the variable shell, the top of piston cavity is the big chamber of bigger piston, cross section, the piston cavity bottom is the less piston loculus in cross section, dress variable piston in the piston cavity, the big chamber of the size on variable piston top and piston coupling, the size of variable piston bottom and piston loculus coupling; Upper flange be provided with constant voltage control valve passage on second mouthful of through hole that communicates, lower flange is provided with the through hole that communicates with axial piston pump main body oil outlet, be provided with the variable piston reset spring in the variable piston loculus, the variable piston is connected with swash plate by bearing pin, is provided with the discharge capacity stop screw of limited piston displacement distance in the piston loculus.
The left end of described constant voltage control valve 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, the PIP setting range is wide, easy to adjust.
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 deciding grade and level axial variable displacement plunger pump is made up of constant voltage control valve and axial plunger oil pump main body; Wherein the constant voltage control valve comprises valve body 1, establish the passage that spool 2 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 4, spring 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 axial piston pump main body oil outlet 17 on the described passage from left to right successively, connect second mouthful (A mouth) of the big end oil pocket of axial piston pump main body control piston and connect the 3rd mouthful (the T mouth) that the axial piston pump main body is leaked hydraulic fluid port 16, 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 constant voltage control valve passage is provided with the internal thread that cooperates with plug screw 10.The right-hand member of spool is tapered, and the spring seat position that contacts with spool is corresponding taper hole form, is provided with the discharge capacity stop screw 22 of limited piston displacement distance in the piston loculus.
Described axial piston pump main body comprises housing parts 20, housing parts is provided with the axial piston pump main body and leaks hydraulic fluid port 16 and axial piston pump main body oil outlet 17, housing parts is connected with variable shell 14, variable shell is connected with upper and lower flange 11,18, piston cavity is set in the variable shell, the top of piston cavity is the big chamber 12 of the bigger piston in cross section, the piston cavity bottom is the less piston loculus 19 in cross section, dress variable piston 13 in the piston cavity, the big chamber of the size on variable piston top and piston coupling, the size of variable piston bottom and piston loculus coupling; Upper flange be provided with constant voltage control valve passage on second mouthful of through hole that communicates, lower flange is provided with the through hole that communicates with axial piston pump main body oil outlet, is provided with the variable piston reset spring in the variable piston loculus, the variable piston is connected with swash plate 15 by bearing pin 21.
Also have spring housing 6, nut 9 among the figure.
During pistons work, when delivery pressure is set up constant pressure less than the constant voltage control valve, act on oil pressure thrust on the constant voltage control valve spool 2 less than setting up spring force, constant voltage control valve P mouth is in closed condition, and A mouth and T mouth are connected, variable piston big chamber 12 off-loads of joining with the A mouth, variable piston 13 is under variable piston loculus 19 pressure promote, make variable piston 13 be pressed in the extreme higher position, swash plate 15 inclination angle maximums, pump delivery pressure oil output; When oil pump delivery pressure during greater than constant voltage control valve setting pressure, the hydraulic coupling that acts on the spool 2 overcomes the spring force that spring 5 is set, spool 2 moves to right, the constant voltage control valve is opened, the P mouth is opened, A mouth and P mouth are connected, A mouth and T mouth disconnect simultaneously, and P mouth pressure oil is through the big chamber 12 of A mouth entering variable piston, and variable piston 13 moves down, until contact discharge capacity stop screw 22, swash plate 15 inclination angles reduce, and the flow of pump is decreased to setting value, because PIP is set by the constant voltage control valve, therefore wider, can between 1 ~ 31.5Mpa, set.When discharge capacity stop screw 22 is regulated downwards, to oil pump zero delivery variations per hour piston 13 lower end positions, this setting axial variable displacement plunger pump can directly use as constant pressure pump.
Claims (3)
1. a deciding grade and level axial variable displacement plunger pump is characterized in that: be made up of constant voltage control valve and axial plunger oil pump main body; Wherein the constant voltage control valve comprises 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 of connecing axial piston pump main body oil outlet on the described passage from left to right successively, connect second mouthful of the big end oil pocket of axial piston pump main body control piston and connect the axial piston pump main body 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; Described axial piston pump main body comprises housing parts, housing parts is provided with the axial piston pump main body and leaks hydraulic fluid port and axial piston pump main body oil outlet, housing parts is connected with variable shell, variable shell is connected with upper and lower flange, piston cavity is set in the variable shell, the top of piston cavity is the big chamber of bigger piston, cross section, the piston cavity bottom is the less piston loculus in cross section, dress variable piston in the piston cavity, the big chamber of the size on variable piston top and piston coupling, the size of variable piston bottom and piston loculus coupling; Upper flange be provided with constant voltage control valve passage on second mouthful of through hole that communicates, lower flange is provided with the through hole that communicates with axial piston pump main body oil outlet, be provided with the variable piston reset spring in the variable piston loculus, the variable piston is connected with swash plate by bearing pin, is provided with the discharge capacity stop screw of limited piston displacement distance in the piston loculus.
2. deciding grade and level axial variable displacement plunger pump according to claim 1 is characterized in that: the left end of described constant voltage control valve passage is provided with the internal thread that cooperates with plug screw.
3. deciding grade and level axial variable displacement plunger pump according to claim 1 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 |
|---|---|---|---|
| CN2011200742215U CN201982265U (en) | 2011-03-21 | 2011-03-21 | Grading variable axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200742215U CN201982265U (en) | 2011-03-21 | 2011-03-21 | Grading variable axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201982265U true CN201982265U (en) | 2011-09-21 |
Family
ID=44609727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200742215U Expired - Lifetime CN201982265U (en) | 2011-03-21 | 2011-03-21 | Grading variable axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201982265U (en) |
Cited By (4)
| 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 |
| CN107143477A (en) * | 2017-06-06 | 2017-09-08 | 中国北方车辆研究所 | A kind of middle position governor motion of conjuncted pump motor |
| CN109931238A (en) * | 2019-04-02 | 2019-06-25 | 安徽理工大学 | A kind of wobbler shaft axial plunger 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 |
-
2011
- 2011-03-21 CN CN2011200742215U patent/CN201982265U/en not_active Expired - Lifetime
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 |
| CN107143477A (en) * | 2017-06-06 | 2017-09-08 | 中国北方车辆研究所 | A kind of middle position governor motion of conjuncted pump motor |
| CN107143477B (en) * | 2017-06-06 | 2018-11-27 | 中国北方车辆研究所 | A kind of middle position regulating mechanism of conjuncted pump motor |
| CN109931238A (en) * | 2019-04-02 | 2019-06-25 | 安徽理工大学 | A kind of wobbler shaft axial plunger 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 |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |