CN2648146Y - Damping piston with sliding bearing - Google Patents
Damping piston with sliding bearing Download PDFInfo
- Publication number
- CN2648146Y CN2648146Y CN 03205937 CN03205937U CN2648146Y CN 2648146 Y CN2648146 Y CN 2648146Y CN 03205937 CN03205937 CN 03205937 CN 03205937 U CN03205937 U CN 03205937U CN 2648146 Y CN2648146 Y CN 2648146Y
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- CN
- China
- Prior art keywords
- main valve
- sliding bearing
- piston
- damping piston
- damp
- 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 - Fee Related
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Abstract
The utility model discloses a damp device used in a hydraulic valve, in particular to a damp piston with a sliding bearing; the utility model mainly consists of a main valve core, the damp piston, a damp chamber, a main valve sleeve, a spring, a hydraulic main valve body and a sliding bearing; the main valve core is arranged in the main valve sleeve and can slide up and down; the main valve sleeve is arranged in the hydraulic main valve body; the damp chamber is formed between the main valve core and the damp piston; the spring is contacted with the damp piston; the other end of the spring is contacted with the sliding bearing; the damp piston is matched and contacted with the sliding bearing and can slide up and down in the main valve core. As the sliding bearing is additionally arranged on the main valve core, the fit clearance of the damp piston can be conveniently implemented with high precision; the utility model has the advantages of simple structure, convenient processing and low cost. The utility model can not only be used for the pressure valves controlled by the electro-hydraulic proportion, but also can be suitable for other hydraulic valves.
Description
Technical field
The utility model relates to a kind of damping device of using in hydrovalve, specifically be the damping piston that has sliding bearing.
Background technique
The pressure of hydrovalve and flow control often realize by the relative position that changes controlled spool and valve pocket or valve body.That is to say that if its relative position changes, controlled pressure and flow just have corresponding variation.Lift a pressure main valve plug example, relied on its valve element position to realize by the size of governor pressure, constant under the normal condition as keeping by governor pressure, to guarantee that then its valve element position is constant.If on spool, do not use damping piston, when there is interference in the external world, for example: the sudden change of system pressure or induced pressure, keep by the not obvious variation of the instant of governor pressure certain degree of difficulty is arranged, the transient response time of the position of spool arrival regulation is longer, have obvious pressure fluctuation in the short time, for this reason, on this spool, added a damping piston as Fig. 2 people, in damping piston and spool, formed an airtight damping cavity, when the wherein pressure oscillation of an end of spool, or have when disturbing pressure surge, the fluid of damping piston and the formed hydraulic pressure cavity of spool has turnover, spool damping is arranged slides up and down, but will rely on spool and the formed leakage way of damping piston outer round surface.Because its matching gap is less, length of thread engagement is long again, has caused the hydraulic damping effect, makes that the fluid turnover of damping cavity is hindered, and also promptly stops pressure surge.Its flow rate is that damping effect depends on its matching gap and length of thread engagement, and it can not be excessive or too small, an amount of.The gap is too big, the flow rate height, and the dress damping piston is equal to nothing.The gap is too little, and flow rate is low, and the settling time of valve core movement is just long.Both all can bring instantaneous obvious pressure fluctuation.Therefore, adding man-hour, spool and the formed matching gap of damping piston outer round surface and length of thread engagement and surface roughness will make its high conformity, in strict conformity with the designing requirement of hydrovalve.
At present, known processing: be directly valve core cavity to be processed, it reached have the dimensional accuracy that is complementary with damping piston, the requirement that surface roughness is good with high-precision internal grinding machine to hydraulic valve core and damping piston cooperation place.Less because of the size diameter in this hole, add the conformity that be difficult to guarantee its high precision and size man-hour, the technological requirement height causes difficulty to processing; And short defective seriously hinders the batch process of its hydraulic valve core surface roughness difference and working life.
Summary of the invention
In order to overcome the batch process hydraulic pressure main valve plug processing difficulties that prior art exists, the defective that surface roughness difference and working life are short, the utility model provides a kind of technological scheme that its technical problem adopts that solves: it is a kind of by main valve plug, damping piston, damping cavity, main valve housing, spring, the hydraulic pressure main valve body is formed, main valve plug is in main valve housing, can slide up and down, main valve housing is contained in the hydraulic pressure main valve body, form damping cavity between main valve plug and the damping piston, spring one end contacts with damping piston, it is characterized in that sliding bearing in addition, it is cylindrical that sliding bearing is that inner and outer surface is, the spring the other end contacts with sliding bearing, sliding bearing matches with the damping piston outer round surface and contacts, and can slide up and down in main valve plug.
Set up with spool and matched with piston, inner and outer surface is circular sliding bearing, and this design has improved the condition that main valve plug cooperates with damping piston, to the surface roughness requirement reduction of the endoporus of hydraulic pressure main valve plug.Adding needn't as long as with general internal grinding machine or with reamer its endoporus is slightly finish reamed, have consistent hole dimension precision just can via high-precision internal grinding machine to the processing of main valve plug inner chamber man-hour.Endoporus by sliding bearing guarantees to realize that it cooperates needed surface roughness with damping piston again.Make the pressure valve core damping effect good, make its life-span long again.Improve the processing technology of original main valve plug simultaneously, be suitable for the batch process processing of hydrovalve.Its practical novel following characteristics that have: machining operation is convenient, as long as have consistent hole dimension precision just can to the hydraulic valve core and the cooperation of damping piston.Realize it being reached requirement to the surface roughness in hole have the dimensional accuracy that is complementary with damping piston, the requirement that surface roughness is good by sliding bearing.Made things convenient for the batch process of main valve plug, stay in grade is reliable.
The technical measures of its solution are: during enforcement, it is to have set up sliding bearing on the hydraulic pressure main valve plug, and damping piston slides up and down in main valve plug by sliding bearing.When main valve plug wherein an end pressure oscillation or have when disturbing pressure surge, because of sliding bearing and formed matching gap of damping piston outer round surface and length of thread engagement high conformity, so damping effect unanimity that the fluid in main valve plug internal damping chamber passes in and out, meet the designing requirement of hydrovalve, pressure response is fast and steady.
Compared with prior art: the beneficial effects of the utility model are to have increased sliding bearing on the main valve plug, make with the matching gap of damping piston can be easily, realize accurately.The material and the hardness of sliding bearing can be different with main valve plug simultaneously, therefore the matching gap and the matching surface roughness of damping piston can remain unchanged for a long time, have prolonged the working life of hydraulic pressure main valve plug and damping piston, and be simple in structure, easy to process during enforcement, cost is low.Can not only be used for the pressure valve of electric-hydraulic proportion control, and can be suitable for other hydrovalve, the utility model adopts sliding bearing to realize, and is simple in structure.The sliding bearing that the utility model is set up is compared with the general expression damping piston of prior art, and advantage that is had and good effect are the inevitable technique effects that is directly brought and produced by technical characteristics.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation, and Fig. 2 is a kind of prior art constructions schematic representation.
Embodiment
As shown in Figure 1, the utility model comprises sequence number 1 main valve plug, sequence number 3 sliding bearings, sequence number 2 damping pistons, sequence number 4 damping cavity.Sequence number 5 is a main valve housing, and main valve plug 1 can slide up and down in main valve housing 5.Sequence number 7 is the hydraulic pressure main valve body, and main valve housing 5 is contained in the hydraulic pressure main valve body 7.Sequence number 6 is a spring, and the one end contacts with sliding bearing 3, and the other end contacts with damping piston 2.Damping piston 2 matches with sliding bearing 3 and contacts, and slides up and down in main valve plug 1.When main valve plug 1 wherein an end pressure oscillation or have when disturbing pressure surge, main valve plug 1 has trend and will move up and down, make it in the fluid turnover of main valve plug 1, but will rely on sliding bearing 3 and the formed leakage way of damping piston 2 outer round surface with damping piston 2 formed damping cavity 4.Because its matching gap is less, length of thread engagement is long again, makes that the fluid turnover of damping cavity 4 is hindered, and has caused the hydraulic damping effect, and its flow rate is that damping effect depends on its matching gap and length of thread engagement.Because of sliding bearing 3 and formed matching gap of damping piston 2 outer round surface and length of thread engagement high conformity, so damping effect unanimity that the fluid in main valve plug 1 internal damping chamber 4 passes in and out, main valve plug 1 damping is arranged slides up and down, and the hydraulic coupling response is fast and steady, also promptly stops pressure surge.
Claims (1)
1, a kind of by main valve plug (1), damping piston (2), damping cavity (4), main valve housing (5), spring (6), the damping piston that has sliding bearing that hydraulic pressure main valve body (7) is formed, main valve plug (1) is in main valve housing (5), main valve housing (5) is contained in the hydraulic pressure main valve body (7), between main valve plug (1) and damping piston (2), form damping cavity (4), spring (6) one ends contact with damping piston (2), it is characterized in that sliding bearing (3) in addition, sliding bearing (3) is that inner and outer surface is columniform sliding bearing, described spring (6) the other end contacts with sliding bearing (3), sliding bearing (3) contacts with damping piston (2) outer round surface, can slide up and down in main valve plug (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03205937 CN2648146Y (en) | 2003-08-08 | 2003-08-08 | Damping piston with sliding bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03205937 CN2648146Y (en) | 2003-08-08 | 2003-08-08 | Damping piston with sliding bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2648146Y true CN2648146Y (en) | 2004-10-13 |
Family
ID=34324365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03205937 Expired - Fee Related CN2648146Y (en) | 2003-08-08 | 2003-08-08 | Damping piston with sliding bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2648146Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155572A (en) * | 2011-04-27 | 2011-08-17 | 北京众博达石油科技有限公司 | Valve plug damping device for electromagnetic valve |
| CN103244492A (en) * | 2012-12-29 | 2013-08-14 | 柳州柳工液压件有限公司 | Tee-joint pressure compensator of metering pump load-sensitive hydraulic system |
| CN108119680A (en) * | 2018-01-12 | 2018-06-05 | 中国航发哈尔滨东安发动机有限公司 | A kind of vibration damping pressure regulator valve |
-
2003
- 2003-08-08 CN CN 03205937 patent/CN2648146Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155572A (en) * | 2011-04-27 | 2011-08-17 | 北京众博达石油科技有限公司 | Valve plug damping device for electromagnetic valve |
| CN102155572B (en) * | 2011-04-27 | 2012-09-05 | 北京众博达石油科技有限公司 | Valve plug damping device for electromagnetic valve |
| CN103244492A (en) * | 2012-12-29 | 2013-08-14 | 柳州柳工液压件有限公司 | Tee-joint pressure compensator of metering pump load-sensitive hydraulic system |
| CN108119680A (en) * | 2018-01-12 | 2018-06-05 | 中国航发哈尔滨东安发动机有限公司 | A kind of vibration damping pressure regulator valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Ningbo Hoyea Machine Manufacturing Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Xin Jun Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041013 Termination date: 20120808 |