CN201972918U - Constant-pressure and remote constant-pressure control valve for axial plunger pump - Google Patents
Constant-pressure and remote constant-pressure control valve for axial plunger pump Download PDFInfo
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- CN201972918U CN201972918U CN2011200742253U CN201120074225U CN201972918U CN 201972918 U CN201972918 U CN 201972918U CN 2011200742253 U CN2011200742253 U CN 2011200742253U CN 201120074225 U CN201120074225 U CN 201120074225U CN 201972918 U CN201972918 U CN 201972918U
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- valve core
- mouthful
- constant voltage
- constant
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Abstract
The utility model discloses a constant-pressure and remote constant-pressure control valve for an axial plunger pump, which comprises a constant-pressure control valve device and a remote constant-pressure control valve device. The constant-pressure control valve device is arranged on a lower stage, and the remote constant-pressure control valve device is arranged on an upper stage. The constant-pressure and remote constant-pressure control valve is reasonable in structure, simple in process, convenient in adjustment, high in generality and stable in constant pressure, and simultaneously has constant-pressure and remote constant-pressure functions.
Description
Technical field
The utility model relates to a kind of axial piston pump constant voltage, long-range 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.Constant flow valve then by means of the differential pressure action of load, makes pump only provide actuator required flow.Conventional pump is regulated inconvenience with the constant voltage control valve, and complex process, versatility are not strong, and service behaviour is undesirable, does not have to have constant voltage and long-range constant voltage function simultaneously.
Summary of the invention
The purpose of this utility model is to provide a kind of rational in infrastructure, easy to adjust, good working effect, has the axial piston pump constant voltage of constant voltage and long-range constant voltage function, long-range constant voltage control valve simultaneously.
Technical solution of the present utility model is:
A kind of axial piston pump is characterized in that: comprise valve body, establish upper channel that upper valve core is housed and the lower channel that lower valve core is housed in the valve body with constant voltage, long-range constant voltage control valve; The lower valve core left end is provided with the hole that communicates with lower channel, top, lower valve core right part is contained on the lower spring cup, lower spring is housed on the lower spring cup, the lower levelling plate that lower spring right side dress is connected with following adjusting screw rod, be provided with first mouthful of connecing the axial piston pump oil outlet on the lower channel 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 upper valve core left end is provided with the hole that communicates with upper channel, top, upper valve core right part is contained on the upper spring seat, upper spring is housed on the upper spring seat, the Upper gasket that upper spring right side dress is connected with the adjusted screw rod, be provided with successively from left to right on the upper channel and first mouthful, second mouthful, the 3rd mouthful opening that communicates, be provided with the four-hole that connects long-range relief valve on the upper spring seat right side.
The left end of described upper channel is provided with the internal thread that cooperates with last plug screw, and the left end of described lower channel is provided with the internal thread that cooperates with following plug screw.
The right-hand member of upper valve core is tapered, and the upper spring seat position that contacts with upper valve core is corresponding taper hole form; The right-hand member of lower valve core is tapered, and the lower spring cup position that contacts with lower valve core is corresponding taper hole form.
The utility model is rational in infrastructure, and technology is simple, easy to adjust, highly versatile, constant voltage stable, has constant voltage and long-range constant voltage function simultaneously.
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 comprises valve body 1 with constant voltage, long-range constant voltage control valve, establishes upper channel that upper valve core 11 is housed and the lower channel that lower valve core 2 is housed in the valve body; The lower valve core left end is provided with the hole that communicates with lower channel, top, lower valve core right part is contained on the lower spring cup 4, lower spring 5 is housed on the lower spring cup, the lower levelling plate 7 that lower spring right side dress is connected with following adjusting screw rod 8, be provided with first mouthful (P mouth) connecing the axial piston pump oil outlet on the lower channel 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; Upper valve core 11 left ends are provided with the hole that communicates with upper channel, top, upper valve core right part is contained on the upper spring seat 12, upper spring 13 is housed on the upper spring seat, the Upper gasket 14 that upper spring right side dress is connected with adjusted screw rod 16, be provided with successively from left to right on the upper channel and first mouthful, second mouthful, the 3rd mouthful opening that communicates, be provided with the four-hole (X mouth) that connects long-range relief valve on the upper spring seat right side.
The left end of described upper channel is provided with the internal thread that cooperates with last plug screw 17, and the left end of described lower channel is provided with the internal thread that cooperates with following plug screw 10.
The right-hand member of upper valve core is tapered, and the upper spring seat position that contacts with upper valve core is corresponding taper hole form; The right-hand member of lower valve core is tapered, and the lower spring cup position that contacts with lower valve core is corresponding taper hole form.
Also have upper spring cover 15, lower spring cover 6, nut 9,18 among the figure.
During constant voltage work, act on the oil pressure in lower valve core left side and the spring force on lower valve core 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.
When long-range constant voltage is worked, the oil pressure (being set in the pressure reduction of upper valve core both sides by long-range relief valve) that acts on the upper valve core left side balances each other with upper valve core right side spring force, the P mouth pressure acts on axial piston pump variable piston by the opening of upper valve core through the A mouth, change oil pump swash plate drift angle, it is required to make flow keep system.
Claims (3)
1. an axial piston pump is characterized in that: comprise valve body, establish upper channel that upper valve core is housed and the lower channel that lower valve core is housed in the valve body with constant voltage, long-range constant voltage control valve; The lower valve core left end is provided with the hole that communicates with lower channel, top, lower valve core right part is contained on the lower spring cup, lower spring is housed on the lower spring cup, the lower levelling plate that lower spring right side dress is connected with following adjusting screw rod, be provided with first mouthful of connecing the axial piston pump oil outlet on the lower channel 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 upper valve core left end is provided with the hole that communicates with upper channel, top, upper valve core right part is contained on the upper spring seat, upper spring is housed on the upper spring seat, the Upper gasket that upper spring right side dress is connected with the adjusted screw rod, be provided with successively from left to right on the upper channel and first mouthful, second mouthful, the 3rd mouthful opening that communicates, be provided with the four-hole that connects long-range relief valve on the upper spring seat right side.
2. axial piston pump according to claim 1 constant voltage, long-range constant voltage control valve, it is characterized in that: the left end of described upper channel is provided with the internal thread that cooperates with last plug screw, and the left end of described lower channel is provided with the internal thread that cooperates with following plug screw.
3. axial piston pump according to claim 1 constant voltage, long-range constant voltage control valve, it is characterized in that: the right-hand member of upper valve core is tapered, and the upper spring seat position that contacts with upper valve core is corresponding taper hole form; The right-hand member of lower valve core is tapered, and the lower spring cup position that contacts with lower valve core is corresponding taper hole form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200742253U CN201972918U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure and remote constant-pressure control valve for axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200742253U CN201972918U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure and remote constant-pressure control valve for axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201972918U true CN201972918U (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200742253U Expired - Fee Related CN201972918U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure and remote constant-pressure control valve for axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201972918U (en) |
Cited By (1)
| 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 |
-
2011
- 2011-03-21 CN CN2011200742253U patent/CN201972918U/en not_active Expired - Fee Related
Cited By (1)
| 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 |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20160321 |