CN109323004A - A kind of reduction clearance leakage structure with transitional pressure chamber - Google Patents
A kind of reduction clearance leakage structure with transitional pressure chamber Download PDFInfo
- Publication number
- CN109323004A CN109323004A CN201811392566.8A CN201811392566A CN109323004A CN 109323004 A CN109323004 A CN 109323004A CN 201811392566 A CN201811392566 A CN 201811392566A CN 109323004 A CN109323004 A CN 109323004A
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- Prior art keywords
- pressure chamber
- pressure
- transitional
- gap
- clearance leakage
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The reduction clearance leakage structure with transitional pressure chamber that the present invention relates to a kind of, including slider, First pressure chamber, second pressure chamber, transitional pressure chamber.The present invention introduces convenient pressure by increasing transitional pressure chamber on slider, is influenced to reduce First pressure chamber or second pressure chamber by clearance leakage.
Description
Technical field
The invention belongs to hydraulic packing field, in particular to a kind of reduction clearance leakage structure with transitional pressure chamber.
Background technique
In hydraulic mechanical equipment, working ability, to guarantee component movement flexibly and due to preventing from expanding with heat and contract with cold etc.,
There is hydraulically full various gaps between opposing stationary or movement component.When different pressure are linked up in these gaps
When chamber, clearance leakage will be led to the problem of by this gap between chamber.The height in the gap is usually less than 0.1mm.Such as cunning
In valve module, it is formed by gap between valve pocket and convex shoulder (slider), has linked up two chambers separated by valve pocket and convex shoulder
Room.Usually in the higher occasion of some control accuracy requirements, clearance leakage can seriously affect the Control platform of equipment.The prior art
It is usually flowed on gap edge and sealing element is installed in length, to reduce clearance leakage.These sealing elements generally use nonmetallic
Material is made, but is limited by use condition, such as pressure, temperature, medium, installation dimension, while service life is limited, and makes
With in the process, easily there is the failure problems such as seal failure, higher operating costs.
Summary of the invention
The purpose of the present invention: a kind of structure is provided and solves the problems, such as to reduce clearance leakage between hydraulic chamber.
Technical solution of the present invention: a kind of reduction clearance leakage structure with transitional pressure chamber, including cavity wall, are provided
One pressure chamber, slider, second pressure chamber, transitional pressure chamber；
First pressure chamber and second pressure chamber are isolated body separation and are independent two chambers, exist between slider and cavity wall
Gap, the gap will lead to First pressure chamber and/or second pressure chamber generates clearance leakage；It is opened on cavity wall and/or slider
There is transitional pressure chamber, transitional pressure chamber and the gap are linked up；
There are pressure difference, First pressure chamber pressure P1 is lower than second pressure chamber pressure for First pressure chamber and second pressure chamber
P2；
When reducing the clearance leakage of First pressure chamber, the value range of transitional pressure chamber pressure P0 is [P1-12 μm of Q/
sh2, P1+12 μm of Q/sh2]；Wherein: μ is fluid kinematic viscosity, and m is that gap edge flows to length, and Q is gap leakage flow rate upper limit value, s
For clearance cross section area, h is clearance height；
When reducing the clearance leakage of second pressure chamber, the value range of transitional pressure chamber pressure P0 is [P2-12 μm of Q/
sh2, P2+12 μm of Q/sh2]。
Preferably, the height value h in the gap is 0.1mm or less.
Preferably, the slider is cavity partition, spool or piston.
Preferably, the transitional pressure chamber is ring cavity or stripe shape chamber.
Preferably, the transitional pressure chamber includes First Transition pressure chamber and the second transitional pressure chamber；First Transition pressure
Chamber is arranged close to First pressure chamber, and pressure value range is [P1-12 μm of Q/sh2, P1+12 μm of Q/sh2]；Second transitional pressure chamber
It is arranged close to second pressure chamber, pressure value range is [P2-12 μm of Q/sh2, P2+12 μm of Q/sh2]。
Preferably, 12 μm of Q/sh of value2Less than the difference of second pressure chamber pressure P2 and First pressure chamber pressure P1.
Working principle:
1. being influenced to reduce First pressure chamber by clearance leakage, then the pressure of transitional pressure chamber is introduced closer to first pressure
Cavity pressure, specifically: the pressure difference absolute value between First pressure chamber and transitional pressure chamber is less than First pressure chamber and second pressure
Pressure difference absolute value between chamber, and the gap between First pressure chamber and transitional pressure chamber is revealed within an acceptable range.
2. being influenced to reduce second pressure chamber by clearance leakage, then the pressure of transitional pressure chamber is introduced closer to second pressure
Cavity pressure, specifically: the pressure difference absolute value between second pressure chamber and transitional pressure chamber is less than second pressure chamber and first pressure
Pressure difference absolute value between chamber, and the gap between second pressure chamber and transitional pressure chamber is revealed within an acceptable range.
3. be while reducing First pressure chamber and second pressure chamber and influenced by clearance leakage, then the pressure of transitional pressure chamber is introduced
Power makes between First pressure chamber and transitional pressure chamber between the pressure of First pressure chamber and the pressure of second pressure chamber
Gap leakage and between second pressure chamber and transitional pressure chamber gap leakage within an acceptable range.
It, also can be in First pressure chamber and the 4. be while reducing First pressure chamber and second pressure chamber and influenced by clearance leakage
Two independent transitional pressure chambers are set between two pressure chambers.Wherein introduce the pressure of the transitional pressure chamber close to First pressure chamber
Closer to first pressure cavity pressure, the pressure of the transitional pressure chamber close to second pressure chamber is introduced closer to second pressure chamber pressure
Power.Specifically: the pressure difference absolute value between First pressure chamber and close transitional pressure chamber is less than First pressure chamber and second
Pressure difference absolute value between pressure chamber, and the gap between First pressure chamber and transitional pressure chamber is revealed in tolerance interval
It is interior；Pressure difference absolute value between second pressure chamber and close transitional pressure chamber be less than First pressure chamber and second pressure chamber it
Between pressure difference absolute value, and gap between second pressure chamber and transitional pressure chamber is revealed within an acceptable range.
Beneficial effects of the present invention: the present invention designs a kind of transitional pressure chamber by gap connecting portion between the chambers
Structure, and specified pressure is introduced to transitional pressure chamber, realize the clearance leakage problem reduced between chamber.The configuration of the present invention is simple
Reliably, it is not easy to be limited by use conditions such as pressure, temperature, media.
Detailed description of the invention
Fig. 1 and Fig. 2 is prior-art illustration.
Fig. 3 is the schematic diagram of the embodiment of the present invention one；
Fig. 4 is the schematic diagram of the embodiment of the present invention two.
Wherein: cavity wall 1, First pressure chamber 2, slider 3, second pressure chamber 4, sealing element 5, transitional pressure chamber 6.
Specific embodiment
Embodiment one, such as Fig. 3, for the case study on implementation in slide valve assembly:
A kind of reduction clearance leakage structure with transitional pressure chamber is in slide valve assembly.Including cavity wall (valve pocket) 1, first
Pressure chamber 2, slider (spool convex shoulder) 3, second pressure chamber 4, transitional pressure chamber 6；
First pressure chamber and second pressure chamber are isolated body (spool convex shoulder) separation and are independent two chambers, slider (valve
Core convex shoulder) and cavity wall (valve pocket) between there are gap, the gap will lead to the gap of First pressure chamber and/or second pressure chamber
Leakage；It is provided with annular transitional pressure chamber along gap lateral length in cavity wall (valve pocket), and is linked up with the gap；
There are pressure difference, First pressure chamber pressure P1 is lower than second pressure chamber pressure P2 for First pressure chamber 2 and second pressure chamber；
For the clearance leakage for reducing First pressure chamber, the value range of transitional pressure chamber pressure P0 is [P1-12 μm of Q/sh2,
P1+12μmQ/sh2]；Wherein: μ is fluid kinematic viscosity, and m is that gap edge flows to length, and Q is gap leakage flow rate upper limit value, and s is
Clearance cross section area, h are clearance height；
For the clearance leakage for reducing second pressure chamber, the value range of transitional pressure chamber pressure P0 is [P2-12 μm of Q/sh2,
P2+12μmQ/sh2]。
Embodiment two, such as Fig. 4, for the case study on implementation in partition:
A kind of reduction clearance leakage structure with transitional pressure chamber, including cavity wall 1, First pressure chamber 2, partition 3, second pressure
Power chamber 4, transitional pressure chamber 6；
First pressure chamber and second pressure chamber are partitioned into independent two chambers, between existing between partition and cavity wall
Gap, the gap will lead to the clearance leakage of First pressure chamber and/or second pressure chamber；Along gap, lateral length is provided in cavity wall
Annular transitional pressure chamber, and linked up with the gap；
There are pressure difference, First pressure chamber pressure P1 is lower than second pressure chamber pressure P2 for First pressure chamber 2 and second pressure chamber；
For the clearance leakage for reducing First pressure chamber, the value range of transitional pressure chamber pressure P0 is [P1-12 μm of Q/sh2,
P1+12μmQ/sh2]；Wherein: μ is fluid kinematic viscosity, and m is that gap edge flows to length, and Q is gap leakage flow rate upper limit value, and s is
Clearance cross section area, h are clearance height；
For the clearance leakage for reducing second pressure chamber, the value range of transitional pressure chamber pressure P0 is [P2-12 μm of Q/sh2,
P2+12μmQ/sh2]。
Claims (6)
1. a kind of reduction clearance leakage structure with transitional pressure chamber, including cavity wall, First pressure chamber, slider, second pressure
Chamber, transitional pressure chamber；
First pressure chamber and second pressure chamber are isolated body separation and are independent two chambers, between existing between slider and cavity wall
Gap, the gap will lead to First pressure chamber and/or second pressure chamber generates clearance leakage；It is provided on cavity wall and/or slider
Transitional pressure chamber, transitional pressure chamber and the gap are linked up；
There are pressure difference, First pressure chamber pressure P1 is lower than second pressure chamber pressure P2 for First pressure chamber and second pressure chamber；
When reducing the clearance leakage of First pressure chamber, the value range of transitional pressure chamber pressure P0 is [P1-12 μm of Q/sh2, P1+
12μmQ/sh2]；Wherein: μ is fluid kinematic viscosity, and m is that gap edge flows to length, and Q is gap leakage flow rate upper limit value, and s is gap
Cross-sectional area, h are clearance height；
When reducing the clearance leakage of second pressure chamber, the value range of transitional pressure chamber pressure P0 is [P2-12 μm of Q/sh2, P2+
12μmQ/sh2]。
2. a kind of reduction clearance leakage structure with transitional pressure chamber according to claim 1, it is characterized in that: the gap
Height value h be 0.1mm or less.
3. a kind of reduction clearance leakage structure with transitional pressure chamber according to claim 1, it is characterized in that: the isolation
Body is cavity partition, spool or piston.
4. a kind of reduction clearance leakage structure with transitional pressure chamber according to claim 1, it is characterized in that: the mistake
Crossing pressure chamber is ring cavity or stripe shape chamber.
5. a kind of reduction clearance leakage structure with transitional pressure chamber according to claim 1, it is characterized in that: the transition
Pressure chamber includes First Transition pressure chamber and the second transitional pressure chamber；First Transition pressure chamber is arranged close to First pressure chamber, pressure
Strong value range is [P1-12 μm of Q/sh2, P1+12 μm of Q/sh2]；Second transitional pressure chamber is arranged close to second pressure chamber, pressure
Value range is [P2-12 μm of Q/sh2, P2+12 μm of Q/sh2]。
6. a kind of reduction clearance leakage structure with transitional pressure chamber according to claim 1, it is characterized in that: 12 μ of value
mQ/sh2Less than the difference of second pressure chamber pressure P2 and First pressure chamber pressure P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392566.8A CN109323004A (en) | 2018-11-21 | 2018-11-21 | A kind of reduction clearance leakage structure with transitional pressure chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392566.8A CN109323004A (en) | 2018-11-21 | 2018-11-21 | A kind of reduction clearance leakage structure with transitional pressure chamber |
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| Publication Number | Publication Date |
|---|---|
| CN109323004A true CN109323004A (en) | 2019-02-12 |
Family
ID=65257856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811392566.8A Pending CN109323004A (en) | 2018-11-21 | 2018-11-21 | A kind of reduction clearance leakage structure with transitional pressure chamber |
Country Status (1)
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| CN (1) | CN109323004A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894056A (en) * | 2020-07-07 | 2022-01-07 | 细美事有限公司 | Semiconductor element pressurizing device and test handler having the same |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107805A (en) * | 1986-11-11 | 1987-04-22 | 许钟麟 | Pressurizing self-sealing airtight system |
| US5267736A (en) * | 1990-09-05 | 1993-12-07 | Blohm & Voss Ag | Sealing apparatus for rotating shafts, in particular stern tube seal for the propeller shaft of a ship |
| CN2179492Y (en) * | 1992-09-24 | 1994-10-12 | 余毅钦 | Ultra high pressure reciprocatable compound dynamic sealing |
| DE19537877A1 (en) * | 1994-10-11 | 1996-04-18 | Caterpillar Inc | Piston position-sensing system for hydraulic cylinder |
| CN101520102A (en) * | 2008-02-25 | 2009-09-02 | 沃尔沃建造设备控股（瑞典）有限公司 | Relive valve |
| CN101832307A (en) * | 2010-01-26 | 2010-09-15 | 西安交通大学 | Frictionless balancing cylinder |
| CN102168760A (en) * | 2011-04-12 | 2011-08-31 | 皇甫岳伟 | Sealing structure with favorable safety for piston cylinder |
| CN102272492A (en) * | 2009-01-12 | 2011-12-07 | 贺尔碧格压缩机技术控股有限公司 | Sealing arrangement for sealing a piston rod of a reciprocating compressor |
| CN104613043A (en) * | 2014-12-30 | 2015-05-13 | 大连维乐液压制造有限公司 | Oil cylinder special for sintering machine |
| CN105333156A (en) * | 2015-11-30 | 2016-02-17 | 西安石油大学 | Combined sealing structure with pressure compensation |
| CN105546114A (en) * | 2016-01-11 | 2016-05-04 | 东方电气集团东方电机有限公司 | Multilevel-redundancy main shaft sealing method |
-
2018
- 2018-11-21 CN CN201811392566.8A patent/CN109323004A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107805A (en) * | 1986-11-11 | 1987-04-22 | 许钟麟 | Pressurizing self-sealing airtight system |
| US5267736A (en) * | 1990-09-05 | 1993-12-07 | Blohm & Voss Ag | Sealing apparatus for rotating shafts, in particular stern tube seal for the propeller shaft of a ship |
| CN2179492Y (en) * | 1992-09-24 | 1994-10-12 | 余毅钦 | Ultra high pressure reciprocatable compound dynamic sealing |
| DE19537877A1 (en) * | 1994-10-11 | 1996-04-18 | Caterpillar Inc | Piston position-sensing system for hydraulic cylinder |
| CN101520102A (en) * | 2008-02-25 | 2009-09-02 | 沃尔沃建造设备控股（瑞典）有限公司 | Relive valve |
| CN102272492A (en) * | 2009-01-12 | 2011-12-07 | 贺尔碧格压缩机技术控股有限公司 | Sealing arrangement for sealing a piston rod of a reciprocating compressor |
| CN101832307A (en) * | 2010-01-26 | 2010-09-15 | 西安交通大学 | Frictionless balancing cylinder |
| CN102168760A (en) * | 2011-04-12 | 2011-08-31 | 皇甫岳伟 | Sealing structure with favorable safety for piston cylinder |
| CN104613043A (en) * | 2014-12-30 | 2015-05-13 | 大连维乐液压制造有限公司 | Oil cylinder special for sintering machine |
| CN105333156A (en) * | 2015-11-30 | 2016-02-17 | 西安石油大学 | Combined sealing structure with pressure compensation |
| CN105546114A (en) * | 2016-01-11 | 2016-05-04 | 东方电气集团东方电机有限公司 | Multilevel-redundancy main shaft sealing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894056A (en) * | 2020-07-07 | 2022-01-07 | 细美事有限公司 | Semiconductor element pressurizing device and test handler having the same |
| CN113894056B (en) * | 2020-07-07 | 2023-09-22 | 细美事有限公司 | Semiconductor element pressurizing device and test handler provided with same |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liao Shengzhu Inventor after: Ding Yan Inventor after: Zhang Cong Inventor after: Zhang Ting Inventor after: Li Keke Inventor after: Sun Baichao Inventor before: Liao Shengzhu |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190212 |