CN207879963U - Low noise throttle valve on oil-pressure damper - Google Patents
Low noise throttle valve on oil-pressure damper Download PDFInfo
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- CN207879963U CN207879963U CN201721835225.4U CN201721835225U CN207879963U CN 207879963 U CN207879963 U CN 207879963U CN 201721835225 U CN201721835225 U CN 201721835225U CN 207879963 U CN207879963 U CN 207879963U
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- valve
- oil
- mobile core
- core valve
- pressure damper
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Abstract
Low noise throttle valve on oil-pressure damper, it is arranged in the adjustment hole of oil-pressure damper guided bearing seat, including being fixed in adjustment hole and in the fixation valve pocket of hollow tubular, it is placed on fixed valve pocket and can be along the mobile core valve that adjustment hole is axially moved, be arranged on mobile core valve and the compression spring flexible with the movement of mobile core valve and cover on compression spring with adjustment hole sealing cooperation adjusting blind nut, mobile core valve bottom is provided with throttle orifice, logical oily aperture is provided on side wall, it is characterized in that the mobile core valve is in the cylindrical shape of upward opening, there is the Oil Guide baffle ring of coaxial arrangement in mobile core valve, Oil Guide baffle ring and mobile core valve inner wall clearance fit, and it is pressed on mobile core valve by compression spring.Orifice restriction is improved to clearance type throttling by the utility model, is reduced the ratio of pressure drop, is avoided the change dramatically of flow area and through-flow direction in valve, and makes fluid olderly flowage, is avoided that turbulent flow and vortex occurs, is effectively reduced oil-pressure damper noise.
Description
Technical field
The utility model is related to the low noise throttle valves on a kind of oil-pressure damper, are used for oil-pressure damper guide support seat
Adjustment hole in.
Background technology
Railway passenger train, especially magnetic suspension passenger train, it is stringenter to the noise control requirement of oil-pressure damper,
It is required that the noise control of oil-pressure damper at 60 decibels hereinafter, and this is all not achieved in the noise control of many oil-pressure dampers at present
One requires, and noise is much larger than 60 decibels, and some is even more than 80 decibels.
The flow noise source for analyzing oil-pressure vibration reducer for railway is mainly shown as air pocket explosion sound, turbulent flow and vortex sound, throttling
High-frequency percussion concussion sound etc. caused by valve high-speed jet.Studies have shown that the noise characteristic of throttle valve depends primarily on three factors：
Liquid flow direction, back pressure and orifice structure.Orifice structure feature determine pressure distribution pattern affect bubble at
It is long, to determine throttle orifice noise characteristic.The throttle valve of current most of oil-pressure dampers, fluid pass through on mobile core valve
Fixed orifice after, fluid volume increases suddenly, and pressure discharges suddenly, easy tos produce big bubble, causes air pocket explosion sound,
Fluid also easily forms turbulent flow and vortex simultaneously.
Invention content
Orifice restriction is improved to clearance type section by the low noise throttle valve on oil-pressure damper provided by the utility model
Stream, reduces the ratio of pressure drop, avoids the change dramatically of flow area and through-flow direction in valve, and make fluid olderly flowage, keep away
Exempt from that turbulent flow and vortex occurs, effectively reduces oil-pressure damper noise.
The technical solution adopted by the present invention is in order to achieve the above objectives：
Low noise throttle valve on oil-pressure damper, is arranged in the adjustment hole of oil-pressure damper guided bearing seat, including
It is fixed in adjustment hole and is in the fixation valve pocket of hollow tubular, is placed on fixed valve pocket and can be axially moved along adjustment hole movable
Core valve, be arranged on mobile core valve and the compression spring flexible with the movement of mobile core valve and cover on compression spring with adjustment hole sealing match
The adjusting blind nut of conjunction, mobile core valve bottom are provided with throttle orifice, logical oily aperture are provided on side wall, it is characterised in that the mobile core
Valve is in the cylindrical shape of upward opening, has the Oil Guide baffle ring of coaxial arrangement in mobile core valve, Oil Guide baffle ring in mobile core valve
Wall clearance fit, and be pressed on mobile core valve by compression spring.
Preferably, the internal diameter of the Oil Guide baffle ring is more than the diameter of throttle orifice, and less than the internal diameter of fixed valve pocket.
Preferably, the Oil Guide baffle ring is double-layer structure, and the outer diameter of lower layer is less than the outer diameter on upper layer.
Preferably, the axial height of the Oil Guide baffle ring is no more than 1.5mm, and the axial height of Oil Guide baffle ring lower layer is not
More than 0.5mm.
Preferably, the Oil Guide baffle ring is two valve structures, and the spacing between two valves is 1 ~ 2mm.
Preferably, the quantity of the logical oily aperture is four, and the circumferentially uniform intervals point on mobile core valve side wall
Cloth leads to a diameter of 1mm of oil aperture.
The operation principle of the utility model is：When oil-pressure damper low speed vibration, oil pressure in oil-pressure damper pressure cylinder
Low, oil pressure cannot overcome the pressure top of compression spring not open mobile core valve, and mobile core valve is closed, and fluid can only pass sequentially through fixed valve pocket
Endoporus, the throttle orifice on mobile core valve, the gap of Oil Guide baffle ring and mobile core valve inner wall, the logical oil on mobile core valve side wall it is small
The oil return hole that guided bearing seat is flowed into behind hole, returns in the oil storage cylinder of damper, then the check valve stream on the bottom valve through damper
Enter pressure cylinder, the unidirectional iterative cycles of fluid；When oil-pressure damper vibration at high speed, oil pressure is high in oil-pressure damper pressure cylinder, oil
Pressure overcomes the open-top mobile core valve of the pressure of compression spring, mobile core valve to open, and most of fluid is through between fixed valve pocket and mobile core valve
Open gap flow to oil return hole, the unidirectional iterative cycles of fluid.
The utility model changes fluid using Oil Guide baffle ring and passes through the fluidic paths after the throttle orifice on mobile core valve, fluid
Become clearance type throttling after throttle orifice throttles, by adding Oil Guide baffle ring, orifice restriction is improved to clearance type throttling, level-one
Throttling is improved to multi-level throttle, reduces the ratio of pressure drop, avoids the change dramatically of flow area and through-flow direction in valve, and makes
Fluid olderly flowage avoids that turbulent flow and vortex occurs, not will produce the noise that screams of high sound level, will not generate bubble, no gas
Cave explosion sound effectively reduces oil-pressure damper noise.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of mobile core valve.
Fig. 3 is the sectional view of Oil Guide baffle ring.
Fig. 4 is the vertical view of Oil Guide baffle ring.
Specific implementation mode
1 to 4 pair of the embodiment of the present invention elaborates below in conjunction with the accompanying drawings.
Low noise throttle valve on oil-pressure damper is arranged in the adjustment hole A of oil-pressure damper guided bearing seat, including
Be fixed in adjustment hole A and in the fixation valve pocket 1 of hollow tubular, be placed on fixed valve pocket 1 and can be axially moved along adjustment hole A
Mobile core valve 2, be arranged on mobile core valve 2 and the compression spring 3 flexible with the movement of mobile core valve 22 and cover on compression spring 3 with tune
The adjusting blind nut 4 of knothole A sealing cooperations, 2 bottom of mobile core valve are provided with throttle orifice 21, and logical oily aperture 22 is provided on side wall, special
Sign is that the mobile core valve 2 is in the cylindrical shape of upward opening, has the Oil Guide baffle ring 5 of coaxial arrangement in mobile core valve 2,
Oil Guide baffle ring 5 and 2 inner wall clearance fit of mobile core valve, and be pressed on mobile core valve 2 by compression spring 3.The Oil Guide baffle ring 5
Internal diameter be more than the diameter of throttle orifice 21, and less than the internal diameter of fixed valve pocket 1.
The Oil Guide baffle ring 5 is double-layer structure, and the outer diameter of lower layer is less than the outer diameter on upper layer.
As shown in Figure 1, when oil-pressure damper low speed vibration, low oil pressure in oil-pressure damper pressure cylinder, oil pressure cannot gram
Mobile core valve 2 is not opened on the pressure top for taking compression spring 3, and mobile core valve 2 is closed, fluid can only pass sequentially through fixed valve pocket 1 endoporus, can
Logical oily aperture on the gap of throttle orifice 21, Oil Guide baffle ring 5 on dynamic core valve 2 and 2 inner wall of mobile core valve, 2 side wall of mobile core valve
The oil return hole B of guided bearing seat is flowed into after 22, that is, is pressed the arrow direction flowing in Fig. 1, returned in the oil storage cylinder of damper, then pass through
Check valve feed pressure cylinder on the bottom valve of damper, the unidirectional iterative cycles of fluid；When oil-pressure damper vibration at high speed, oil pressure
Oil pressure is high in damper pressure cylinder, the open-top mobile core valve of pressure of oil pressure counter compression spring 3, and mobile core valve 2 is opened, most of fluid
Oil return hole, the unidirectional iterative cycles of fluid are flowed to through the open gap between fixed valve pocket and mobile core valve.Oil-pressure damper low speed
When vibration, change fluid by the fluidic paths after the throttle orifice on mobile core valve using Oil Guide baffle ring 5, fluid is through throttle orifice 21
After throttling, become between mobile core valve 2 and Oil Guide baffle ring 5 clearance type throttling, i.e., by orifice restriction be improved to clearance type throttling,
Level-one throttling is improved to multi-level throttle, reduces the ratio of pressure drop, avoids the drastically change of flow area and through-flow direction in valve
Change, and make fluid olderly flowage, avoids that turbulent flow and vortex occurs, not will produce the noise that screams of high sound level, gas will not be generated
Bubble, no air pocket explosion sound effectively reduce oil-pressure damper noise.
Wherein, the axial height H2 of the Oil Guide baffle ring 5 is no more than 1.5mm, and the axial height of 5 lower layer of Oil Guide baffle ring
H1 is no more than 0.5mm.Can fully meet the needs of multi-level throttle.
Wherein, the Oil Guide baffle ring 5 is two valve structures, and the space D between two valves is 1 ~ 2mm.Increase throttle chink,
The ratio for further decreasing pressure drop avoids the change dramatically of flow area and through-flow direction in valve, effectively prevent bubble noise.
Wherein, the quantity of the logical oily aperture 22 is four, and the circumferentially uniform intervals point on 2 side wall of mobile core valve
Cloth leads to a diameter of 1mm of oil aperture 22, with oil return hole B unicom, forms drainback passage.
The technical solution of the embodiment of the present invention is completely described above in association with attached drawing, it should be noted that described
Embodiment be only the present invention a part of the embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art exist
The every other embodiment obtained under the premise of not making creative work, shall fall within the protection scope of the present invention.
Claims (6)
1. the low noise throttle valve on oil-pressure damper, is arranged the adjustment hole in oil-pressure damper guided bearing seat（A）In, including
It is fixed on adjustment hole（A）In and in hollow tubular fixation valve pocket（1）, be placed in fixed valve pocket（1）It above and can be along adjustment hole（A）Axis
To the mobile core valve of movement（2）, be arranged in mobile core valve（2）Above and with mobile core valve（2）Movement and flexible compression spring（3）With
It covers in compression spring（3）Upper and adjustment hole（A）Seal the adjusting blind nut of cooperation（4）, mobile core valve（2）Bottom is provided with throttle orifice（21）,
Logical oily aperture is provided on side wall（22）, it is characterised in that the mobile core valve（2）In the cylindrical shape of upward opening, mobile core
Valve（2）The interior Oil Guide baffle ring with coaxial arrangement（5）, Oil Guide baffle ring（5）With mobile core valve（2）Inner wall clearance fit, and pass through
Compression spring（3）It is pressed on mobile core valve（2）On.
2. the low noise throttle valve on oil-pressure damper according to claim 1, it is characterised in that the Oil Guide baffle ring
（5）Internal diameter be more than throttle orifice（21）Diameter, and less than fixed valve pocket（1）Internal diameter.
3. the low noise throttle valve on oil-pressure damper according to claim 1, it is characterised in that the Oil Guide baffle ring
（5）For double-layer structure, and the outer diameter of lower layer is less than the outer diameter on upper layer.
4. the low noise throttle valve on oil-pressure damper according to claim 3, it is characterised in that the Oil Guide baffle ring
（5）Axial height be no more than 1.5mm, and Oil Guide baffle ring（5）The axial height of lower layer is no more than 0.5mm.
5. the low noise throttle valve on oil-pressure damper according to claim 1, it is characterised in that the Oil Guide baffle ring
（5）For two valve structures, and the spacing between two valves is 1 ~ 2mm.
6. the low noise throttle valve on oil-pressure damper according to claim 1, it is characterised in that the logical oily aperture
（22）Quantity be four, and circumferentially in mobile core valve（2）It is evenly spaced on side wall, leads to oil aperture（22）It is a diameter of
1mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721835225.4U CN207879963U (en) | 2017-12-25 | 2017-12-25 | Low noise throttle valve on oil-pressure damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721835225.4U CN207879963U (en) | 2017-12-25 | 2017-12-25 | Low noise throttle valve on oil-pressure damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207879963U true CN207879963U (en) | 2018-09-18 |
Family
ID=63504038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721835225.4U Active CN207879963U (en) | 2017-12-25 | 2017-12-25 | Low noise throttle valve on oil-pressure damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207879963U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255848A (en) * | 2020-01-17 | 2020-06-09 | 常州中车柴油机零部件有限公司 | Adjustable damping valve for rail vehicle vibration absorber and adjusting method thereof |
-
2017
- 2017-12-25 CN CN201721835225.4U patent/CN207879963U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255848A (en) * | 2020-01-17 | 2020-06-09 | 常州中车柴油机零部件有限公司 | Adjustable damping valve for rail vehicle vibration absorber and adjusting method thereof |
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