CN202017616U - Constant-pressure controlled and constant-pressure remote controlled axial plunger pump - Google Patents
Constant-pressure controlled and constant-pressure remote controlled axial plunger pump Download PDFInfo
- Publication number
- CN202017616U CN202017616U CN2011200742249U CN201120074224U CN202017616U CN 202017616 U CN202017616 U CN 202017616U CN 2011200742249 U CN2011200742249 U CN 2011200742249U CN 201120074224 U CN201120074224 U CN 201120074224U CN 202017616 U CN202017616 U CN 202017616U
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- piston
- constant voltage
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- mouthful
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Abstract
The utility model discloses a constant-pressure controlled and constant-pressure remote controlled axial plunger pump, which comprises a valve. An upper channel with an upper spool and a lower channel with a lower spool are mounted in the valve, the left end of the lower spool is provided with a hole communicated with the lower channel, the right end of the lower spool is butted against a lower spring seat, a lower spring is mounted on the lower spring seat, and a lower gasket connected with a lower adjusting screw is mounted on the right side of the lower spring. The lower channel is provided with a first port, a second port and a third port sequentially from left to right, wherein the first port is connected with an oil outlet port of the axial plunger pump, the second port is connected with an oil cavity at a large end of a control piston of the axial plunger pump, and the third port is connected with an oil leakage port of the axial plunger pump. A damping oil channel is arranged between the second port and the third port and provided with a damping plug screw. The left end of the upper spool is provided with a hole communicated with the upper channel, the right end of the upper spool is butted against an upper spring seat, an upper spring is mounted on the upper spring seat, an upper gasket connected with an upper adjusting screw is mounted on the right side of the upper spring, the upper channel is provided with openings which are communicated with the first port, the second port and the third port sequentially from left to right, and a fourth port connected with a remote overflow valve is arranged on the right side of the upper spring seat.
Description
Technical field
The utility model relates to a kind of constant voltage, long-range constant voltage control axial piston pump.
Background technique
Constant voltage control axial piston pump, 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 constant voltage of constant voltage and long-range constant voltage function, long-range constant voltage control axial piston pump simultaneously.
Technical solution of the present utility model is:
A kind of constant voltage, long-range constant voltage control axial piston pump is characterized in that: be made up of constant voltage, long-range constant voltage control valve and axial plunger oil pump main body; Wherein constant voltage, long-range constant voltage control valve 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; 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; 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, is provided with the variable piston reset spring in the variable piston loculus, the variable piston is connected with swash plate by bearing pin.
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 constant voltage, long-range constant voltage control axial piston pump comprise valve body 1, establish 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.
Described axial piston pump main body comprises housing parts 25, housing parts is provided with the axial piston pump main body and leaks hydraulic fluid port 21 and axial piston pump main body oil outlet 22, housing parts is connected with variable shell 19, variable shell is connected with upper and lower flange 27,23, piston cavity is set in the variable shell, the top of piston cavity is the big chamber 28 of the bigger piston in cross section, the piston cavity bottom is the less piston loculus 24 in cross section, dress variable piston 29 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 20 by bearing pin 26.
During constant voltage 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, the variable piston big chamber off-load of joining with the A mouth, variable piston 18 is under variable piston loculus 24 pressure promote, make the variable piston be pressed in the extreme higher position, swashplate angle maximum, 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 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, and A mouth and T mouth disconnect simultaneously, and P mouth pressure oil is through the big chamber of A mouth entering variable piston, the variable piston moves down, swashplate angle reduces, and the flow of pump reduces, and is required until keeping system, this moment constant voltage control valve spool 2 left sides hydraulic coupling and spring force balance, spool 2 openings reach a state of equilibrium, and the variable piston is in the equilibrium position, make the system held constant pressure.
When long-range constant voltage is worked, the spring force that the oil pressure thrust of differential pressure action between oil pump delivery pressure and long-range relief valve on spool 11 is set less than upper spring, the P mouth is in closed condition, A mouth and T mouth are connected, with the variable piston big chamber off-load that the A mouth joins, the variable piston makes variable piston 18 be pressed in the extreme higher position under the promotion of variable piston loculus 24 pressure, swash plate 20 inclination angle maximums, pump full dose pressure oil output; The hydraulic coupling of differential pressure action on spool 11 between oil pump delivery pressure and long-range relief valve overcomes the spring force that spring 13 is set, spool 11 moves to right, long-range 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, P mouth pressure oil is through the big chamber of A mouth entering variable piston, and the variable piston moves down, and swashplate angle reduces, the flow of pump reduces, required until keeping system, hydraulic coupling and spring force balance that this moment, spool 11 pressure at both sides differences produced, spool 11 openings reach a state of equilibrium, the variable piston is in the equilibrium position, makes the system held constant pressure.
Can come the constant voltage value of oil pump is set by the telecontrol relief valve, when enabling the long-range constant voltage control valve of higher level, subordinate's constant voltage control valve can be set safety valve for; Also can only, only need seal the X mouth, tighten long-range constant voltage control valve adjusting screw rod without the telecontrol relief valve with subordinate's constant voltage control valve.
Claims (3)
1. a constant voltage, long-range constant voltage are controlled axial piston pump, it is characterized in that: be made up of constant voltage, long-range constant voltage control valve and axial plunger oil pump main body; Wherein constant voltage, long-range constant voltage control valve 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; 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; 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, is provided with the variable piston reset spring in the variable piston loculus, the variable piston is connected with swash plate by bearing pin.
2. constant voltage according to claim 1, long-range constant voltage control axial piston pump, 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. constant voltage according to claim 1, long-range constant voltage control axial piston pump, 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 |
|---|---|---|---|
| CN2011200742249U CN202017616U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure controlled and constant-pressure remote controlled axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200742249U CN202017616U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure controlled and constant-pressure remote controlled axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202017616U true CN202017616U (en) | 2011-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200742249U Expired - Lifetime CN202017616U (en) | 2011-03-21 | 2011-03-21 | Constant-pressure controlled and constant-pressure remote controlled axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202017616U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635546A (en) * | 2012-05-02 | 2012-08-15 | 浙江大学 | Plunger pump with composite shell |
| 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 |
| CN108302078A (en) * | 2018-03-19 | 2018-07-20 | 安徽博流体传动股份有限公司 | Remote-control pressure control valve |
| CN112628101A (en) * | 2020-12-07 | 2021-04-09 | 宁波恒力液压股份有限公司 | Flow control valve for plunger pump |
-
2011
- 2011-03-21 CN CN2011200742249U patent/CN202017616U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635546A (en) * | 2012-05-02 | 2012-08-15 | 浙江大学 | Plunger pump with composite shell |
| 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 |
| CN108302078A (en) * | 2018-03-19 | 2018-07-20 | 安徽博流体传动股份有限公司 | Remote-control pressure control valve |
| CN112628101A (en) * | 2020-12-07 | 2021-04-09 | 宁波恒力液压股份有限公司 | Flow control valve for plunger pump |
| CN112628101B (en) * | 2020-12-07 | 2022-09-16 | 宁波恒力液压股份有限公司 | Flow control valve for 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 |
Granted publication date: 20111026 |
|
| CX01 | Expiry of patent term |