CN201448539U - Hydraulic rotary joint with high performance, high reliability and long service life - Google Patents
Hydraulic rotary joint with high performance, high reliability and long service life Download PDFInfo
- Publication number
- CN201448539U CN201448539U CN2009200572486U CN200920057248U CN201448539U CN 201448539 U CN201448539 U CN 201448539U CN 2009200572486 U CN2009200572486 U CN 2009200572486U CN 200920057248 U CN200920057248 U CN 200920057248U CN 201448539 U CN201448539 U CN 201448539U
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- China
- Prior art keywords
- rotating shaft
- wear
- fixed ring
- resisting
- housing
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- Expired - Fee Related
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Abstract
The utility model relates to a hydraulic rotary joint with high performance, high reliability and long service life, which is equipped with a casing and a rotating shaft. Oil holes are arranged on the casing, oil channels are arranged in the rotating shaft, the communicating position of each oil hole on the casing and each oil channel in the rotating shaft is equipped with a floating wear-resisting fixed ring which is in clearance fit with the rotating shaft, and two ends of a clearance between the floating wear-resisting fixed ring and the casing are equipped with sealing rings. Pressure media are input or output via the oil holes and then reach the rotating shaft via a ring groove of each floating wear-resisting fixed ring and an oil through radial hole, and the clearance between the casing and each floating wear-resisting fixed ring is sealed by aid of rotary seal, thereby eliminating flow loss of the pressure medium here. Further, the clearance between each floating wear-resisting fixed ring and the rotating shaft is very small, and then leakage is low. When the pressure media flow out of two equilong annular clearances, the clearances are supported via fluid static pressure. Because the sealing rings are elastic, the floating wear-resisting fixed ring is in a floating state relative to the rotating shaft.
Description
[technical field]
The utility model relates to a kind of hydraulic pressure installation, especially relates to a kind of high-performance, high reliability, long-life hydraulic swivel joint.
[background technique]
If on the device of high speed rotating, oil hydraulic cylinder is housed, then need to use swivel joint to its fed sheet of a media.Hydraulic rotary joint does not form standardization at present, and home products is immature.Be illustrated in figure 1 as the structural representation of existing seal ring formula hydraulic rotary joint, it is between housing 1 place that hydraulic fluid port 4 is arranged and rotating shaft 2 seal ring 7 to be installed, its shortcoming is: because the linear velocity of high pressure rotary sealing is at 0.2m/s～1m/s, so the maximum speed of the hydraulic rotary joint of this form only adapts to 90～640r/min usually, be 90r/min during working pressure 30Mpa wherein, being 200r/min during 20Mpa, is 640r/min during 10Mpa; Prescribe a time limit above last when rotating speed, seal ring is wearing and tearing fast, cause the hydraulic rotary joint inefficacy, thus can only satisfy low speed rotation, and its life-span weak point.Be illustrated in figure 2 as the structural representation of existing clearance seal formula hydraulic rotary joint, it is to adopt the clearance type fitted seal between rotating shaft 2 and housing 1, and its shortcoming is: the manufacturing process difficulty is big, and unreliable, leaks big; Because the pressure of the hydraulic medium that transmits is to rely on the slit between housing and the rotating shaft to keep, and must make the matching gap of housing and rotating shaft very little.Simultaneously the concentricity between circularity, straightness accuracy and the housing bearings at both ends positioning hole of housing and rotating shaft fitting surface all there is very high requirement, just might reaches comparatively ideal working state.And actual present technology difficulty satisfy designing requirement, cause the hydraulic rotary joint of this form to be prone to eccentric wear, the fluid dirt easily causes between rotating shaft and housing stuck, otherwise can only be by amplifying the gap, but it is very big that the problem of bringing simultaneously is exactly a leakage rate, causes system works efficient to reduce greatly.
[model utility content]
In order to overcome the above-mentioned shortcoming of prior art, the utility model provides a kind of high-performance, high reliability, long-life hydraulic swivel joint.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of high-performance, high reliability, long-life hydraulic swivel joint, comprise housing and rotating shaft, on housing, be provided with hydraulic fluid port, in rotating shaft, be provided with oil duct, the oil duct place of being connected in hydraulic fluid port on the described housing and the rotating shaft is equipped with the wear-resisting fixed ring that floats, float between wear-resisting fixed ring and the rotating shaft to the slit cooperates, float wear-resisting decide to encircle and housing between the two ends, slit seal ring is installed.
At the logical oily radial hole in the middle part of the described wear-resisting fixed ring that floats, this logical oily radial hole communicates with hydraulic fluid port and oil duct respectively.
End at described housing is provided with end cap.
Side at described housing is provided with drain tap.
The beneficial effects of the utility model are: hydraulic medium enters (or output) by hydraulic fluid port, annular groove and logical oily radial hole through the wear-resisting fixed ring that floats arrive rotating shaft, be transported to the interface of the hydraulic system element of whirligig mechanism by rotating shaft, wherein the housing and the wear-resisting slit of deciding interannular of floating are sealed in rotary seal, guarantee that hydraulic medium does not have flow loss at this; The slit of floating between wear-resisting fixed ring and rotating shaft is very little, reveal also very little, when pressure medium is located two isometric annuluss and is flowed out by this, make this place, slit form the hydrostatic pressure supporting, and this slit height is much smaller than the housing and the wear-resisting slit height of deciding interannular that floats, because seal ring is flexible, so the wear-resisting fixed ring that should float is in quick condition with respect to rotating shaft; Simultaneously, the hydraulic medium that floats and flow out between wear-resisting fixed ring and rotating shaft slit, the draining passage on the wear-resisting fixed ring that floats flows to the drain tap of swivel joint, outwards flows back to system.
[description of drawings]
Fig. 1 is the structural representation of existing seal ring formula hydraulic rotary joint;
Fig. 2 is the structural representation of existing clearance seal formula hydraulic rotary joint;
Fig. 3 is a structural representation of the present utility model;
Fig. 4 is an A partial enlarged drawing among Fig. 3.
Among the figure: 1-housing, 2-rotating shaft, 3-end cap, 4-hydraulic fluid port, 5-drain tap, 6-bearing, 7-seal ring, the unsteady wear-resisting fixed ring of 8-, 9-oil duct, the logical oily radial hole of 10-, 11-draining passage.
[embodiment]
Below in conjunction with drawings and Examples the utility model is further specified:
Referring to Fig. 3 and Fig. 4, high-performance, high reliability, long-life hydraulic swivel joint, housing 1 and rotating shaft 2 are arranged, be provided with end cap 3 in the end of housing 1, on housing 1, be provided with hydraulic fluid port 4, side at housing 1 is provided with drain tap 5, in rotating shaft 2, be provided with oil duct 9, hydraulic fluid port 4 on described housing 1 and oil duct 9 places of being connected in the rotating shaft 2 are equipped with and unsteadyly wear-resistingly encircle 8 surely, float wear-resisting encircle surely 8 with rotating shaft 2 between for the slit cooperates, unsteady wear-resisting encircle surely 8 and housing 1 between the two ends, slit seal ring 7 is installed.Hydraulic medium enters (or output) by hydraulic fluid port 4, through the wear-resisting oil duct 9 that 8 annular groove and logical oily radial hole 10 arrive in the rotating shafts 2 that encircles surely that floats, be transported to the interface of the hydraulic system element of whirligig mechanism by the oil duct 9 in the rotating shaft 2, wherein rotary seal is sealed housing 1 and the wear-resisting slit of encircling 8 surely of floating, and guarantees that hydraulic medium does not have flow loss at this; Float wear-resisting encircle surely 8 and the slit of 2 of rotating shafts very little, reveal also very little, when pressure medium is located two isometric annuluss and is flowed out by this, make this place, slit form the hydrostatic pressure supporting, and this slit height is much smaller than the housing 1 and the wear-resisting slit height that encircles 8 surely that floats, because seal ring 7 is flexible, wear-resistingly encircled 8 surely and be in quick condition with respect to rotating shaft 2 so should float; Simultaneously, float wear-resisting encircle surely 8 with rotating shaft 2 slits between the hydraulic medium that flows out, flow to drain tap 5 on swivel joint and the housing 1 through the unsteady wear-resisting draining passage 11 that encircles surely on 8, outwards flow back to system.
When hydraulic rotary joint is worked, be that rotating shaft 2 is when rotating with rotating machinery, owing to float wear-resisting encircle surely 8 and 2 of rotating shafts formed the hydrostatic pressure supporting, so do not contact mutually between them, only produce the fluid friction of viscosity, simultaneously since this fluid friction much smaller than the frictional force at seal ring 7 places, so rotating shaft 2 is rotated, floating, wear-resisting to encircle 8 maintenances of floating surely motionless; In addition; float and wear-resistingly to encircle 8 surely and also play the safety protection effect; promptly in case occur dirt cause rotating shaft 2 with float wear-resisting encircle surely 8 stuck; float and wear-resistingly to encircle 8 surely and will do relative rotation, guarantee the stable of housing 1, at this moment with 1 of housing; rotating seal ring 7 will play and keep working state in short-term; hydraulic rotary joint can not lose efficacy immediately, change or maintenance float wear-resisting encircle 8 assemblies surely after, hydraulic rotary joint can recover proper functioning.
The working pressure of this hydraulic rotary joint depends on seal ring 7, can reach 30～40Mpa, rotating speed depends on rotating shaft 2 and the wear-resisting working state of encircling 8 surely of floating, can reach 3000～10000r/min, from the above mentioned, this model utility is a kind of high-performance, high reliability, long-life hydraulic rotary joint.
Claims (4)
1. a high-performance, high reliability, long-life hydraulic swivel joint, comprise housing and rotating shaft, on housing, be provided with hydraulic fluid port, in rotating shaft, be provided with oil duct, it is characterized in that: the oil duct place of being connected in hydraulic fluid port on the described housing and the rotating shaft is equipped with the wear-resisting fixed ring that floats, float between wear-resisting fixed ring and the rotating shaft to the slit cooperates, float wear-resisting decide to encircle and housing between the two ends, slit seal ring is installed.
2. high-performance as claimed in claim 1, high reliability, long-life hydraulic swivel joint is characterized in that: at the logical oily radial hole in the middle part of the described wear-resisting fixed ring that floats, this logical oily radial hole communicates with hydraulic fluid port and oil duct respectively.
3. high-performance as claimed in claim 1, high reliability, long-life hydraulic swivel joint is characterized in that: the end at described housing is provided with end cap.
4. as claim 1 or 3 described high-performance, high reliability, long-life hydraulic swivel joint, it is characterized in that: the side at described housing is provided with drain tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200572486U CN201448539U (en) | 2009-05-25 | 2009-05-25 | Hydraulic rotary joint with high performance, high reliability and long service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200572486U CN201448539U (en) | 2009-05-25 | 2009-05-25 | Hydraulic rotary joint with high performance, high reliability and long service life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201448539U true CN201448539U (en) | 2010-05-05 |
Family
ID=42553257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200572486U Expired - Fee Related CN201448539U (en) | 2009-05-25 | 2009-05-25 | Hydraulic rotary joint with high performance, high reliability and long service life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201448539U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104767A (en) * | 2013-02-04 | 2013-05-15 | 连云港远洋流体装卸设备有限公司 | Rotary connector specially used at ultralow temperature |
| CN103216697A (en) * | 2013-05-07 | 2013-07-24 | 滕州市惠丰机械制造有限公司 | Steel smelting converter rotating joint capable of being rapidly repaired |
| CN103712015A (en) * | 2013-12-27 | 2014-04-09 | 大连瑞谷科技有限公司 | Four-point thrust angular contact type rotating joint |
| CN107504191A (en) * | 2017-10-13 | 2017-12-22 | 四川省机械研究设计院 | Oil acceptor containing servo loop structures |
| CN110513555A (en) * | 2019-08-23 | 2019-11-29 | 江苏腾旋科技股份有限公司 | A kind of wind power plant rotary joint |
-
2009
- 2009-05-25 CN CN2009200572486U patent/CN201448539U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104767A (en) * | 2013-02-04 | 2013-05-15 | 连云港远洋流体装卸设备有限公司 | Rotary connector specially used at ultralow temperature |
| CN103104767B (en) * | 2013-02-04 | 2015-12-09 | 连云港远洋流体装卸设备有限公司 | Ultralow temperature Special rotary joint |
| CN103216697A (en) * | 2013-05-07 | 2013-07-24 | 滕州市惠丰机械制造有限公司 | Steel smelting converter rotating joint capable of being rapidly repaired |
| CN103712015A (en) * | 2013-12-27 | 2014-04-09 | 大连瑞谷科技有限公司 | Four-point thrust angular contact type rotating joint |
| CN107504191A (en) * | 2017-10-13 | 2017-12-22 | 四川省机械研究设计院 | Oil acceptor containing servo loop structures |
| CN110513555A (en) * | 2019-08-23 | 2019-11-29 | 江苏腾旋科技股份有限公司 | A kind of wind power plant rotary joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20140525 |