CN104196802B - Variable displacement control valve - Google Patents
Variable displacement control valve Download PDFInfo
- Publication number
- CN104196802B CN104196802B CN201410453891.6A CN201410453891A CN104196802B CN 104196802 B CN104196802 B CN 104196802B CN 201410453891 A CN201410453891 A CN 201410453891A CN 104196802 B CN104196802 B CN 104196802B
- Authority
- CN
- China
- Prior art keywords
- cavity
- valve gap
- valve
- spool
- valve body
- 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.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 13
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 208000002925 dental caries Diseases 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Multiple-Way Valves (AREA)
- Sliding Valves (AREA)
Abstract
Variable displacement control valve, including valve body, valve gap and spool；Valve body is the housing of one end open；Valve gap is the hollow axle of one end open, its outer wall is provided with two spaced apart shaft shoulders, valve gap is sleeved in valve body, and the inside of valve body is divided into two cavitys by valve gap and two shaft shoulders thereon, and valve body is provided with the oil-in communicated with the first cavity and the oil-out communicated with the second cavity；Spool is that one end is provided with shoulder hole, the other end is provided with the axis body of blind hole, and its outer wall is provided with a circle groove, and valve core housing is contained in valve gap, and the groove of spool and the inwall of valve gap enclose formation the 3rd cavity, and the shoulder hole of spool is internally formed the 4th cavity with valve gap；The opening of valve gap is provided with flow regulator pieces, is provided with spring in the 4th cavity, and the blind hole of spool and flow regulator pieces enclose formation the 5th cavity, and porose back-up ring is installed in the outside being positioned at flow regulator pieces in valve gap.The simple in construction of variable displacement control valve, mounting means that the present invention provides are flexible, and can effectively regulate the flow of liquid.
Description
Technical field
The present invention relates to forklift hydraulic system and control device, relate in particular to a kind of variable displacement control valve.
Background technology
In the forklift hydraulic system of high-pressure high-flow, when fork truck lifting oil cylinder is when declining, and oil cylinder is negative
High-speed motion under the effect carried, causes high speed piston to move to the terminal of stroke, play the most often occurs
Strong mechanical movement；Equally, pipeline in hydraulic system can also be caused when the piston of high-speed motion stops suddenly
Water hammer, cause the biggest impact and noise.The phenomenon that high speed piston motion causes can affect fork truck
Service behaviour, damage the Hydraulic Elements in hydraulic cylinder and fork truck.Therefore pacify in the hydraulic system of fork truck
It is the most necessary that dress throttle grverning Hydraulic Elements regulate the excessive decrease speed of hydraulic cylinder.
The throttling speed control circuit that the most conventional throttle grverning Hydraulic Elements are provided in cylinder device,
This loop generally uses the hydraulic circuit of the compositions such as dosing pump, flow valve and overflow valve.This structure phase
To complexity, cost is high, energy loss is big, at the bottom of efficiency, heating is big, be commonly used in low pressure and power is little
In equipment.
Summary of the invention
The technical problem to be solved be to provide a kind of simple in construction, mounting means flexibly, flow adjusts
The variable displacement control valve that joint efficiency is high.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that variable displacement control valve, including
Valve body, valve gap and spool；
Valve body is the housing of one end open；
Valve gap is the hollow axle of one end open, and its outer wall is provided with two spaced apart shaft shoulders, and the shaft shoulder sets
Have external screw thread, valve gap to be sleeved on interior and valve gap the opening of valve body to stay between the inwall of relative valve body
Having space, the inwall of valve body is provided with in the position of the shaft shoulder of corresponding valve gap and matches with the external screw thread on the shaft shoulder
The female thread closed, installs between the other end and the opening of valve body of the valve gap relative with the opening of valve gap
Having sealing ring, valve gap and two shaft shoulders thereon that the inside of valve body is divided into two cavitys, one of them is
The first cavity between two shaft shoulders, another be in second cavity of inner side of two shaft shoulders,
Valve body is provided with the oil-in communicated with the first cavity and the oil-out communicated with the second cavity；
Spool is that one end is provided with shoulder hole, the other end is provided with the axis body of blind hole, and it is recessed that its outer wall is provided with a circle
Groove, valve core housing is contained in valve gap and the inside towards valve gap, that one end being provided with shoulder hole of spool, valve
The groove of core and the inwall of valve gap enclose formation the 3rd cavity, and the shoulder hole of spool is internally formed with valve gap
4th cavity, valve gap is provided with more than one and connects the first cavity and the first oilhole of the 4th cavity and one
More than connecting the second cavity and the second oilhole of the 3rd cavity, spool is provided with more than one connection the 3rd chamber
Body and the 3rd oilhole of the 4th cavity；
The opening of valve gap is provided with flow regulator pieces, is provided with spring in the 4th cavity, spool under the action of the spring its
That one end being provided with blind hole is resisted against on flow regulator pieces, and the blind hole of spool and flow regulator pieces enclose formation the 5th cavity,
Have connection the second cavity and the throttle orifice of the 5th cavity on flow regulator pieces, in valve gap, be positioned at the outside of flow regulator pieces
Porose back-up ring is installed.
The action principle of this variable displacement control valve is: when oil cylinder hoists, liquid oil-in from valve body enters the
One cavity, enters the 4th cavity through the first oilhole, then enters the 3rd cavity through the 3rd oilhole, then through second
Oilhole enters the second cavity, and decline liquid enters the 5th cavity through throttle orifice, and remaining liq is from valve body
On oil-out discharge, now, oil cylinder at the uniform velocity hoists.When oil cylinder declines under the effect of load, due to
In-oil cylinder pressure raises, and the hydraulic coupling in the 5th cavity gradually rises, and final hydraulic coupling overcomes spring force
Spool is moved towards the inside of valve gap, so that the overflow section of the first oilhole is gradually reduced by spool,
The flow of liquid entering the 4th cavity through the first oilhole gradually decreases, thus reaches to control the motion of oil cylinder
The purpose of speed, and oil cylinder is under different loads, and the displacement that spool moves is different, thus reaches
Speed to real requirement.
Knowable to technique scheme, the simple in construction of variable displacement control valve of present invention offer, mounting means
Flexibly, and can effectively regulate the flow of liquid.
As the improvement of the present invention, the outer wall of spool is provided with some circle the first balancing slits, the blind hole of spool
Hole wall is provided with circle second balancing slit.Use this structure can to eliminate with the radial force on balance valve core
Lateral hydraulic force on spool.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the structural representation of the valve gap of one embodiment of the invention.
Fig. 3 is the structural representation of the spool of one embodiment of the invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
See Fig. 1, Fig. 2 and Fig. 3.
Variable displacement control valve, including valve body 1, valve gap 2 and spool 3；
Valve body 1 is the housing of one end open；
Valve gap 2 is the hollow axle of one end open, and its outer wall is provided with two spaced apart shaft shoulders 21, the shaft shoulder
21 are provided with external screw thread, in valve gap 2 is sleeved on valve body 1 and the opening of valve gap 2 and relative valve body
Leaving space between the inwall of 1, the inwall of valve body 1 is provided with in the position of the shaft shoulder 21 of corresponding valve gap 2
The female thread matched with the external screw thread on the shaft shoulder 21, the valve gap 2 relative with the opening of valve gap 2 another
Being provided with sealing ring 4, valve gap 2 and two shaft shoulders 21 thereon between the opening of one end and valve body 1 will
The inside of valve body 1 is divided into two cavitys, one of them first cavity 51 being between two shaft shoulders 21,
Another is in second cavity 52 of inner side of two shaft shoulders 21, and valve body 1 is provided with and the first cavity
Oil-in 11 that 51 communicate and the oil-out 12 communicated with the second cavity 52；
Spool 3 is provided with shoulder hole 31 for one end, the other end is provided with the axis body of blind hole 32, and its outer wall is provided with
One circle groove 33, in spool 3 is sleeved on valve gap 2 and that one end court being provided with shoulder hole 31 of spool 3
To the inside of valve gap 2, the groove 33 of spool 3 encloses formation the 3rd cavity 53, valve with the inwall of valve gap 2
The shoulder hole 31 of core 3 is internally formed the 4th cavity 54 with valve gap, and valve gap 2 is provided with four connections first
First oilhole 22 of cavity 51 and the 4th cavity 54 and four connect the second cavity 52 and the 3rd cavity 53
The second oilhole 23, it is the 3rd oily that spool 3 is provided with three connections the 3rd cavitys 53 and the 4th cavitys 54
Hole 34；
The opening of valve gap 2 is provided with flow regulator pieces 6, is provided with spring 7 in the 4th cavity 54, and spool 3 is at spring
The effect of 7 its that one end being provided with blind hole 32 lower is resisted against on flow regulator pieces 6, the blind hole 32 of spool 3 and joint
Flow 6 encloses formation the 5th cavity 55, and flow regulator pieces 6 has connection the second cavity 52 and the 5th cavity
The throttle orifice 61 of 55, porose back-up ring 8 is installed in the outside being positioned at flow regulator pieces 6 in valve gap 2.
The outer wall of spool 3 is provided with some circle the first balancing slits 35, and the hole wall of the blind hole 32 of spool 3 sets
There is circle second balancing slit 36.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all in the present invention
Spirit and principle within any amendment, equivalent and the improvement etc. made, should be included in the present invention
Protection domain within.
Claims (2)
1. variable displacement control valve, including valve body, valve gap and spool；
Valve body is the housing of one end open；
Valve gap is the hollow axle of one end open, its outer wall is provided with two spaced apart shaft shoulders, the shaft shoulder is provided with external screw thread, valve gap is sleeved on interior and valve gap the opening of valve body and leaves space between the inwall of relative valve body, the inwall of valve body is provided with the female thread matched with the external screw thread on the shaft shoulder in the position of the shaft shoulder of corresponding valve gap, between the other end and the opening of valve body of the valve gap relative with the opening of valve gap, sealing ring is installed, the inside of valve body is divided into two cavitys by valve gap and two shaft shoulders thereon, one of them is in the first cavity between two shaft shoulders, another is that the connection of valve gap lateral wall is near the second cavity formed between the shaft shoulder and the inside of valve body of the opening side of valve gap, valve body is provided with the oil-in communicated with the first cavity and the oil-out communicated with the second cavity；
Spool is that one end is provided with shoulder hole, the other end is provided with the axis body of blind hole, its outer wall is provided with a circle groove, in valve core housing is contained in valve gap and the inside towards valve gap, that one end being provided with shoulder hole of spool, the groove of spool and the inwall of valve gap enclose formation the 3rd cavity, the shoulder hole of spool is internally formed the 4th cavity with valve gap, valve gap is provided with more than one and connects the first cavity and the first oilhole of the 4th cavity and more than one connects the second cavity and the second oilhole of the 3rd cavity, and spool is provided with more than one connection the 3rd cavity and the 3rd oilhole of the 4th cavity；
The opening of valve gap is provided with flow regulator pieces, it is provided with spring in 4th cavity, spool its that one end being provided with blind hole under the action of the spring is resisted against on flow regulator pieces, the blind hole of spool and flow regulator pieces enclose formation the 5th cavity, having connection the second cavity and the throttle orifice of the 5th cavity on flow regulator pieces, porose back-up ring is installed in the outside being positioned at flow regulator pieces in valve gap.
2. the variable displacement control valve as described in claim 1, it is characterised in that: the outer wall of spool is provided with some circle the first balancing slits, and the hole wall of the blind hole of spool is provided with circle second balancing slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453891.6A CN104196802B (en) | 2014-09-06 | 2014-09-06 | Variable displacement control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453891.6A CN104196802B (en) | 2014-09-06 | 2014-09-06 | Variable displacement control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104196802A CN104196802A (en) | 2014-12-10 |
| CN104196802B true CN104196802B (en) | 2016-08-17 |
Family
ID=52082145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410453891.6A Active CN104196802B (en) | 2014-09-06 | 2014-09-06 | Variable displacement control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104196802B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678107B (en) * | 2017-01-19 | 2018-01-09 | 宁波江北宇洲液压设备厂 | A kind of special governor valve of fork truck |
| CN108505969B (en) * | 2018-04-18 | 2024-02-27 | 盐城庆隆机械有限公司 | Time delay valve |
| CN110219848A (en) * | 2019-07-27 | 2019-09-10 | 蚌埠液力机械有限公司 | Integrated form variable control valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4107074B2 (en) * | 2002-12-04 | 2008-06-25 | 株式会社島津製作所 | Flow control valve |
| DE102004020275B4 (en) * | 2004-03-15 | 2006-04-27 | Brueninghaus Hydromatik Gmbh | Valve |
| KR100621983B1 (en) * | 2004-07-23 | 2006-09-14 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Variable regulating valve for heavy equipment |
| CN202348806U (en) * | 2011-12-07 | 2012-07-25 | 燕山大学 | proportional cartridge valve with variable flow gain |
| CN204061394U (en) * | 2014-09-06 | 2014-12-31 | 蚌埠液力机械有限公司 | Variable displacement control valve |
-
2014
- 2014-09-06 CN CN201410453891.6A patent/CN104196802B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104196802A (en) | 2014-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203570734U (en) | Balance valve, hydraulic cylinder telescopic control loop and hydraulic equipment | |
| CN103742473B (en) | Split Type Pilot Load Control Valve | |
| CN103573735B (en) | Guide's heavy traffic load control valve of application displacement-force feedback principle | |
| CN105952705B (en) | Balanced valve | |
| CN104358728B (en) | Relief function is integrated in to the secondary loads control valve of guide's spool | |
| CN104196802B (en) | Variable displacement control valve | |
| CN103090070A (en) | Piloted type pressure reducing valve | |
| CN104989690B (en) | Overload relief valve | |
| CN204328065U (en) | Hydrovalve and there is hoist motor control system, the hoist of this hydrovalve | |
| CN202851494U (en) | Pilot-operated type overflow valve | |
| CN103671321A (en) | Hydraulic control valve | |
| CN105402449B (en) | Hydraulic control one-way valve | |
| CN203655762U (en) | Split type pilot load control valve | |
| CN108167256A (en) | A kind of plug-in trimmer valve | |
| CN105201942A (en) | Balance valve and automobile crane | |
| CN102367818A (en) | Special integrated group valve for electrohydraulic push rod | |
| CN204061394U (en) | Variable displacement control valve | |
| CN103122881B (en) | Guide's reduction valve | |
| CN205578387U (en) | Unloading valve is carried to positive and negative turning over | |
| CN203548395U (en) | Plate-type hydraulic balance valve | |
| CN106870499A (en) | A kind of damping buffering valve | |
| CN103089730A (en) | Balance valve for pump truck and response differential pressure control method of secondary overflow valve of balance valve for pump truck | |
| CN201184387Y (en) | Magnetorheological Damper with Adjustable Damping | |
| CN105221514A (en) | A kind of integrated hydraulic cylinder with bidirection press safety protection | |
| CN210290316U (en) | One-way constant speed valve and steady speed hydraulic cylinder with one-way constant speed valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |