CN109386513A - A kind of PQ valve - Google Patents
A kind of PQ valve Download PDFInfo
- Publication number
- CN109386513A CN109386513A CN201811507165.2A CN201811507165A CN109386513A CN 109386513 A CN109386513 A CN 109386513A CN 201811507165 A CN201811507165 A CN 201811507165A CN 109386513 A CN109386513 A CN 109386513A
- Authority
- CN
- China
- Prior art keywords
- valve
- working edge
- slide valve
- oil return
- grade
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sliding Valves (AREA)
Abstract
The invention belongs to field of hydraulic control, it is related to a kind of PQ valve, mainly it is made of pilot stage, feedback spring and slide valve pair, slide valve countershaft is to the asymmetric fit dimension of oil inlet and oil return working edge, it is spool stroke (8-12) % that oil inlet, which controls side controlling dead error, it is spool stroke (6-10) % that oil return, which controls side controlling dead error, and the radial gap that controls is in (6-8) micron.The PQ valve arrangement is simple, and interior leakage is small, and the linear convergent rate of output flow and pressure can be achieved at the same time, and is not required to carry out function switch.
Description
Technical field
The invention belongs to Hydraulic Fields, are related to a kind of PQ valve.
Background technique
Common electrohydraulic servo valve is generally divided into serving volume valve and pressure servo valve, and serving volume valve exports linearly defeated
Outflow, and the pressure exported rises to rapidly rated pressure if leaving zero-bit；Pressure servo valve exports linear pressure,
To realize power control.In general, good position closed loop may be implemented in serving volume valve, and it is difficult to take into account the power control system of power closed loop
System, general PQ valve is to be integrated with two sets of control systems of flow and pressure, and structure is complicated, and position control and pressure closed loop function
It needs to switch mutually.
Summary of the invention
The object of the invention: providing a kind of linear convergent rate that output flow and pressure can be achieved at the same time, and is not required to carry out function
The novel PQ valve of switching.
The technical scheme is that a kind of novel PQ valve, which is characterized in that including pilot stage 1, feedback spring 2 and slide
Valve grade 3；Pilot stage 1 and slide valve grade 3 are by the progress function connects of feedback spring 2；It is characterized in that, the slide valve grade 3 axially engages
Working edge is using the asymmetric plus lap design of oil inlet working edge L and oil return working edge M.
The oil inlet working edge L control is laminated in spool stroke 8-12%, and oil return working edge M control is laminated in spool stroke
6-10%.
The slide valve grade 3 increases radial fit gap.
The radial fit gap is at 6-8 microns.
Beneficial effects of the present invention: the present invention using related PQ valve using slide valve grade 3 axially engage working edge into
The asymmetric plus lap design structure of oily working edge A and oil return working edge B is simple, and the linear of output flow and pressure can be achieved at the same time
Output is not required to carry out function switch.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of PQ valve of the present invention；
Fig. 2 is the oil inlet working edge partial enlargement structural representation of PQ valve Fig. 1 of the present invention；
Fig. 3 is the oil return working edge partial enlargement structural representation of PQ valve Fig. 1 of the present invention.
Wherein, 1- pilot stage, 2- feedback spring, 3- slide valve grade
Specific embodiment
To better illustrate the present invention, illustrate with reference to the accompanying drawing.
FIG. 1 to FIG. 3 is please referred to, is schematic structural view of the invention and structural implementation.
A kind of novel PQ valve, including pilot stage 1, feedback spring 2 and slide valve grade 3；Pilot stage 1 and slide valve grade 3 are by feedback bullet
Spring 2 carries out function connects；Slide valve grade 3 axially engages working edge using oil inlet working edge L and the asymmetric plus lap of oil return working edge M
Design.
Oil inlet working edge L control is laminated in spool stroke 8-12%, and oil return working edge M control is laminated in spool stroke 6-
10%, slide valve grade 3 increases radial fit gap, and the radial fit gap is at 6-8 microns.
When pilot stage 1 receives control signal, an electromagnetic torque is generated, a pressure difference is formed under its effect and acts on cunning
The spool both ends of valve grade 3, to make valve core movement, while the movement of spool drives coupled feedback spring 2 to move, and generates
One feedback moment, when feedback moment and electromagnetic torque balance each other, spool stops at the position directly proportional to control signal, also,
The operation window of slide valve grade 3 forms certain hydraulic aperture, and oil inlet working edge of the hydraulic oil Jing Guo slide valve grade 3 enters control chamber,
A part flows into oil return by oil return working edge simultaneously, thus flow and pressure that output is directly proportional to control signal.Therefore, real
The bilinearity output of existing flow and pressure.
Claims (4)
1. a kind of PQ valve, which is characterized in that including pilot stage (1), feedback spring (2) and slide valve grade (3)；Pilot stage (1) and cunning
Valve grade (3) carries out function connects by feedback spring (2)；It is characterized in that, the slide valve grade (3) axially engage working edge use into
The asymmetric plus lap design of oily working edge L and oil return working edge M.
2. PQ valve according to claim 1, it is characterised in that: the oil inlet working edge L control is laminated in spool stroke 8-
12%, oil return working edge M control are laminated in spool stroke 6-10%.
3. PQ valve according to claim 1 or 2, it is characterised in that: the slide valve grade (3) increases radial fit gap.
4. PQ valve according to claim 3, it is characterised in that: the radial fit gap is at 6-8 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507165.2A CN109386513A (en) | 2018-12-11 | 2018-12-11 | A kind of PQ valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507165.2A CN109386513A (en) | 2018-12-11 | 2018-12-11 | A kind of PQ valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109386513A true CN109386513A (en) | 2019-02-26 |
Family
ID=65430334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811507165.2A Pending CN109386513A (en) | 2018-12-11 | 2018-12-11 | A kind of PQ valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109386513A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039288A (en) * | 1989-07-24 | 1990-01-31 | 权宇 | Composite control valve of pressure and flow proportional to electric current |
| CN2357170Y (en) * | 1999-02-08 | 2000-01-05 | 浙江大学 | Electric hydraulic proportional pressure flow composite controlling valve |
| CN2755331Y (en) * | 2004-09-10 | 2006-02-01 | 新会北部精机有限公司 | Composite valve with proportional pressure flow |
| CN201065863Y (en) * | 2007-07-19 | 2008-05-28 | 中山市钜通机电技术有限公司 | Composite control valve for proportional pressure and flow |
| CN201471670U (en) * | 2009-07-29 | 2010-05-19 | 杭州大禹机械有限公司 | Rubber injection molding machine |
| CN202387755U (en) * | 2011-12-15 | 2012-08-22 | 广东科达机电股份有限公司 | Large hydraulic pump station with step-less adjustable pressure and flow |
| CN205858814U (en) * | 2016-06-19 | 2017-01-04 | 广州嘉泰液压机电有限公司 | The hydraulic system that a kind of pair vane pump PQ valve controls |
-
2018
- 2018-12-11 CN CN201811507165.2A patent/CN109386513A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039288A (en) * | 1989-07-24 | 1990-01-31 | 权宇 | Composite control valve of pressure and flow proportional to electric current |
| CN2357170Y (en) * | 1999-02-08 | 2000-01-05 | 浙江大学 | Electric hydraulic proportional pressure flow composite controlling valve |
| CN2755331Y (en) * | 2004-09-10 | 2006-02-01 | 新会北部精机有限公司 | Composite valve with proportional pressure flow |
| CN201065863Y (en) * | 2007-07-19 | 2008-05-28 | 中山市钜通机电技术有限公司 | Composite control valve for proportional pressure and flow |
| CN201471670U (en) * | 2009-07-29 | 2010-05-19 | 杭州大禹机械有限公司 | Rubber injection molding machine |
| CN202387755U (en) * | 2011-12-15 | 2012-08-22 | 广东科达机电股份有限公司 | Large hydraulic pump station with step-less adjustable pressure and flow |
| CN205858814U (en) * | 2016-06-19 | 2017-01-04 | 广州嘉泰液压机电有限公司 | The hydraulic system that a kind of pair vane pump PQ valve controls |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190226 |