CN202017615U - Constant pressure controlled axial plunger pump - Google Patents

Constant pressure controlled axial plunger pump Download PDF

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Publication number
CN202017615U
CN202017615U CN2011200742126U CN201120074212U CN202017615U CN 202017615 U CN202017615 U CN 202017615U CN 2011200742126 U CN2011200742126 U CN 2011200742126U CN 201120074212 U CN201120074212 U CN 201120074212U CN 202017615 U CN202017615 U CN 202017615U
Authority
CN
China
Prior art keywords
piston
variable
pump main
constant voltage
voltage control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2011200742126U
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Chinese (zh)
Inventor
杨徐辉
黄忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU HENGYUAN HYDRAULIC CO Ltd
Original Assignee
JIANGSU HENGYUAN HYDRAULIC CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU HENGYUAN HYDRAULIC CO Ltd filed Critical JIANGSU HENGYUAN HYDRAULIC CO Ltd
Priority to CN2011200742126U priority Critical patent/CN202017615U/en
Application granted granted Critical
Publication of CN202017615U publication Critical patent/CN202017615U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a constant pressure controlled axial plunger pump, which consists of a constant pressure control valve and an axial plunger oil pump main body, wherein the constant pressure control valve comprises a valve body, a passage on which a valve core is arranged is formed in the valve body, the left end of the valve core is provided with a hole communicated with the passage, the right end of the valve core is propped on a spring seat, a spring is arranged on the spring seat, and a gasket connected with an adjusting screw is arranged on the right side of the spring; a first port connected with the oil outlet of the axial plunger pump main body, a second port connected with a big end oil cavity of a control piston of the axial plunger pump main body and a third port connected with the leaking oil port of the axial plunger pump main body are sequentially formed on the passage from left to right; a damping oil passage is formed between the second port and the third port; and a damping screw plug is arranged on the damping oil passage. The constant pressure controlled axial plunger pump has the advantages of reasonable structure, simplicity in process, convenience for adjusting, strong universality and stable constant pressure.

Description

Constant voltage control axial piston pump
Technical field
The utility model relates to a kind of 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, when the pilot pressure of pump was set by the constant pressure valve of pump, when the pressure of default, it only was to keep the required discharge capacity of this system pressure that pump delivery is adjusted to down rapidly automatically.Common constant voltage control pump is regulated inconvenience, 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, and constant voltage a kind of rational in infrastructure, easy to adjust, good working effect is controlled axial piston pump.
Technical solution of the present utility model is:
A kind of constant voltage control axial piston 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, 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 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, 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 constant voltage control axial piston 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.
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 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, and A mouth and T mouth disconnect simultaneously, and P mouth pressure oil is through the big chamber 12 of A mouth entering variable piston, variable piston 13 moves down, swash plate 15 inclination angles reduce, and the flow of pump reduces, and are 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 variable piston 13 is in the equilibrium position, make the system held constant pressure.

Claims (3)

1. a constant voltage control axial piston 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, 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 control axial piston pump according to claim 1, it 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. constant voltage control axial piston pump 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.
CN2011200742126U 2011-03-21 2011-03-21 Constant pressure controlled axial plunger pump Expired - Lifetime CN202017615U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200742126U CN202017615U (en) 2011-03-21 2011-03-21 Constant pressure controlled axial plunger pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200742126U CN202017615U (en) 2011-03-21 2011-03-21 Constant pressure controlled axial plunger pump

Publications (1)

Publication Number Publication Date
CN202017615U true CN202017615U (en) 2011-10-26

Family

ID=44811285

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011200742126U Expired - Lifetime CN202017615U (en) 2011-03-21 2011-03-21 Constant pressure controlled axial plunger pump

Country Status (1)

Country Link
CN (1) CN202017615U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104234992A (en) * 2013-11-20 2014-12-24 江苏恒立液压有限公司 Plunger pump power control device and control method thereof
CN104234993A (en) * 2014-01-02 2014-12-24 江苏恒立液压有限公司 Hydraulic piston pump power control device and hydraulic piston pump power control method
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
CN109931238A (en) * 2019-04-02 2019-06-25 安徽理工大学 A kind of wobbler shaft axial plunger pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104234992A (en) * 2013-11-20 2014-12-24 江苏恒立液压有限公司 Plunger pump power control device and control method thereof
CN104234992B (en) * 2013-11-20 2016-08-17 江苏恒立液压有限公司 A kind of power of plunger pump controls device and control method thereof
CN104234993A (en) * 2014-01-02 2014-12-24 江苏恒立液压有限公司 Hydraulic piston pump power control device and hydraulic piston pump power control method
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
CN109931238A (en) * 2019-04-02 2019-06-25 安徽理工大学 A kind of wobbler shaft axial plunger pump

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CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20111026