CN202659482U - Novel compensating seal structure for hydraulic oil pump - Google Patents
Novel compensating seal structure for hydraulic oil pump Download PDFInfo
- Publication number
- CN202659482U CN202659482U CN 201220231863 CN201220231863U CN202659482U CN 202659482 U CN202659482 U CN 202659482U CN 201220231863 CN201220231863 CN 201220231863 CN 201220231863 U CN201220231863 U CN 201220231863U CN 202659482 U CN202659482 U CN 202659482U
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- CN
- China
- Prior art keywords
- stuffing box
- box gland
- hydraulic oil
- oil pump
- sealing
- 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 - Lifetime
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Abstract
The utility model discloses a novel compensating seal structure for a hydraulic oil pump. The novel compensating seal structure for the hydraulic oil pump comprises a pump body and a reversing valve arranged inside the pump body; a step valve hole with a step is arranged on the reversing valve; a sealing subassembly is arranged inside the step valve hole; the sealing subassembly comprises a sealing sleeve and an O-shaped seal ring; the appearance of the sealing sleeve is of a ladder structure, and the O-shaped seal ring is sheathed at the bottom part of the sealing sleeve and resists against the step surface of the sealing sleeve. According to the compensating seal structure, the tightness of the system is improved. The service life of the product is prolonged due to improvement of the wear resistance and a self-compensating action. The one-time yield of assembly is also greatly improved by improvement of rigidity and a dual-seal function; meanwhile, the processing cost of the product is reduced, and the processing technique demand is also reduced.
Description
Technical field
The utility model sealing configuration relates to a kind of heavy card auto parts machinery, is mainly concerned with heavily to block automobile cab hydraulic overturn device lifting pump commutation sealing configuration.
Background technique
The operator cabin hydraulic overturn system requires running precision high, and operating pressure is high, and the commutation number of times requires high, and the life-span is long.After equipment continuous operation a period of time, the accelerated ageing of hydraulic system seal element, dust and abrasive dust enter system, system is formed pollute, and have accelerated the wearing and tearing of the pump housing and Sealing, cause the oil liquid leakage pressure drop until without pressure, affect normalization production.At present, the commutation sealing means of cab tilting system employing mainly contains clearance seal and two kinds of forms of interference sealing.
Be illustrated in figure 1 as clearance seal, comprise the selector valve 2 in the pump housing 1 and the pump housing 1, selector valve 2 is provided with valve opening 3, clearance seal is to make the minimum sealing (material: steel to steel) that realizes in gap between the pump housing 1 and selector valve 2 fitting surfaces by precision machining, can adopt clearance seal such as the sealing between selector valve and the selector valve mounting hole, the shortcoming of its existence has: to processing precision of products, process equipment precision and processing technology require high, and also unusually responsive to minute impurities.Be illustrated in figure 2 as the interference sealing, comprise the selector valve 2 in the pump housing 1 and the pump housing 1, selector valve 2 is provided with step valve opening 4 with the level, and step valve opening 4 is provided with soft seal cover 5.The interference sealing is to realize sealing by the certain magnitude of interference of fitting surface generation that soft seal is overlapped between 5 counterparts, and the shortcoming of its existence has: the one, and soft seal cover 5 is easily by the burr scratch; The 2nd, it is large that 5 moisture absorptions are overlapped in soft seal, and dimensional stability is relatively poor; The 3rd, soft seal cover 5 is easy to wear in contaminated fluid, and is aging.Above-mentioned two kinds of sealing configurations all easily lost efficacy, thereby caused operator cabin hydraulic overturn oil pump to work.
The model utility content
The utility model purpose is to overcome the deficiency that above-mentioned operator cabin hydraulic overturn oil pump exists, and a kind of novel sealing configuration with compensate function is provided, and simple in structure, long service life has higher reliability.
The technological scheme that the technical problem that the utility model solves adopts is: the compensation sealing configuration that provides a kind of novel hydraulic oil pump to use, comprise the selector valve 2 in the pump housing 1 and the pump housing 1, selector valve 2 is provided with step valve opening 4 with the level, be provided with black box in the step valve opening 4, it is characterized in that black box comprises stuffing box gland 6 and O-ring seals 7, stuffing box gland 6 profiles are ladder-type structure, and O-ring seals 7 is enclosed within the bottom of stuffing box gland 6, withstand on the ladder surface of stuffing box gland 6.
During implementation, stuffing box gland is the polyoxymethylene stuffing box gland.The material of polyoxymethylene stuffing box gland is softer have self-lubricating function and friction factor low have than the material of high wear resistance make stuffing box gland.
During implementation, the ladder surface of stuffing box gland is conical surface.
During implementation, stuffing box gland is with to contact pump housing inner cavity surface suitable, the sealing surface of stuffing box gland and pump housing inner cavity surface interference fit.
Structure of the present utility model, with the pump housing commutation valve opening face realization interference fit seal that matches, have higher sealability, rely on simultaneously the elasticity of the O-ring seals that matches with stuffing box gland, compensate the dimensional changes that behind the stuffing box gland sealing surface wear that causes after long-time the use, causes.The sealing of this structure has the following advantages: the one, and pump housing selector valve hole surface need not to do cure process, and processing and assembling easily can reduce the tool processes cost; The 2nd, when maintenance, the general replacing stuffing box gland that only needs can continue to use, but Cost reduction; The 3rd, the stuffing box gland material is relatively soft, have the under pressure characteristics of enlarged, sealing improves, and has self lubricity, so the pump housing hole id tolerance that cooperates is with it required to decrease, pump housing selector valve internal surface of hole processing requirements is also significantly reduced.The 4th, the O-ring seals that cooperates with it is after stuffing box gland wearing and tearing, and the elasticity that relies on himself with compensating action, makes it to continue to keep sealing to it.The 5th, selector valve adopts Spielpassung can remove the burr that cooperates fitting surface cross hole place with the commutation valve opening, is not subjected to scratch with the protection stuffing box gland.The 6th, stuffing box gland is the stepped shaft form structure, plays a supportive role after the thinner part in lower end puts O-ring seals, avoids fluid and its to make it produce contraction deformation under high-speed friction condition, is brought into oilhole and cuts off O-ring seals.
The beneficial effects of the utility model have: the utility model has improved the sealing of system, because the raising of wear resistance and auto-compensation have improved product working life, the raising of rigidity and double-sealing function also increase substantially the disposable up-to-standard rate of assembling, reduce simultaneously the processing cost of product, reduced the process engineering requirement of processing.
Description of drawings
Below in conjunction with drawings and Examples model utility is further specified.
Fig. 1 is the gap sealed structural representation of prior art.
Fig. 2 is the structural representation of the interference sealing of prior art.
Fig. 3 is the utility model embodiment's structural representation.
Fig. 4 is the structural representation that the utility model embodiment's stuffing box gland cooperates with O-ring seals.
Among the figure: 1. the pump housing; 2. selector valve; 3. valve opening; 4. step valve opening; 5. soft seal cover; 6. stuffing box gland; 7. O-ring seals.
Embodiment
Among Fig. 3 and Fig. 4, the compensation sealing configuration that a kind of novel hydraulic oil pump is used, comprise the selector valve 2 in the pump housing 1 and the pump housing 1, selector valve 2 is provided with valve opening 4 with the level, is provided with black box in the valve opening 4, and black box comprises stuffing box gland 6 and O-ring seals 7, stuffing box gland 6 profiles are ladder-type structure, the ladder surface of stuffing box gland 6 is conical surface, and O-ring seals 7 is enclosed within the bottom of stuffing box gland 6, withstands on the ladder surface of stuffing box gland 6.Stuffing box gland 6 is the polyoxymethylene stuffing box gland.Stuffing box gland 6 is with to contact the pump housing 1 inner cavity surface suitable, the sealing surface of stuffing box gland 6 and the pump housing 1 inner cavity surface interference fit.It is soft that the stuffing box gland 6 that the utility model adopts has material, self-lubricating function is arranged, and friction factor hangs down the good characteristics of wear resistance, the O-ring seals 7 that cooperates with it uses for more than 6 time at stuffing box gland, and after friction produces wearing and tearing between the pump housing 1 commutation valve opening, the elasticity that relies on himself is compensated in size to stuffing box gland 6, all the time be in interference fit and continue to keep sealing with the commutation valve opening of the pump housing 1, improved product working life, and the pump housing 1 commutation valve opening id tolerance that cooperates is with it required to decrease, the pump housing 1 selector valve internal surface of hole processing requirements is also significantly reduced, reduced processing cost, improved product percent of pass.Simultaneously stuffing box gland 6 be the stepped shaft form structure, plays a supportive role after the thinner part in lower end puts O-ring seals 7, avoids fluid and its to make its generation contraction deformation under high-speed friction condition, is brought into oilhole and cuts off.
The same prior art of the utility model embodiment's basic functional principle is not done narration at this.
Above-described embodiment is to explanation of the present utility model, is not to restriction of the present utility model, and any structure after simple transformation on the utility model basis all belongs to protection domain of the present utility model.
Claims (4)
1. compensation sealing configuration that the novel hydraulic oil pump is used, comprise the selector valve (2) in the pump housing (1) and the pump housing (1), selector valve (2) is provided with step valve opening with the level (4), the step valve opening is provided with black box in (4), it is characterized in that black box comprises stuffing box gland (6) and O-ring seals (7), stuffing box gland (6) profile is ladder-type structure, and O-ring seals (7) is enclosed within the bottom of stuffing box gland (6), withstands on the ladder surface of stuffing box gland (6).
2. the compensation sealing configuration used of a kind of novel hydraulic oil pump according to claim 1 is characterized in that stuffing box gland (6) is the polyoxymethylene stuffing box gland.
3. the compensation sealing configuration used of a kind of novel hydraulic oil pump according to claim 1 and 2, the ladder surface that it is characterized in that stuffing box gland (6) is conical surface.
4. the compensation sealing configuration used of a kind of novel hydraulic oil pump according to claim 1 and 2 is characterized in that stuffing box gland (6) and to contact the pump housing (1) inner cavity surface suitable, the sealing surface of stuffing box gland (6) and the pump housing (1) inner cavity surface interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231863 CN202659482U (en) | 2012-05-23 | 2012-05-23 | Novel compensating seal structure for hydraulic oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231863 CN202659482U (en) | 2012-05-23 | 2012-05-23 | Novel compensating seal structure for hydraulic oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659482U true CN202659482U (en) | 2013-01-09 |
Family
ID=47454391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220231863 Expired - Lifetime CN202659482U (en) | 2012-05-23 | 2012-05-23 | Novel compensating seal structure for hydraulic oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202659482U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256216A (en) * | 2013-04-26 | 2013-08-21 | 上海中欧汽车电器有限公司 | Distribution shaft with fault-tolerant function and manual hydraulic pump provided with distribution shaft |
-
2012
- 2012-05-23 CN CN 201220231863 patent/CN202659482U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256216A (en) * | 2013-04-26 | 2013-08-21 | 上海中欧汽车电器有限公司 | Distribution shaft with fault-tolerant function and manual hydraulic pump provided with distribution shaft |
| CN103256216B (en) * | 2013-04-26 | 2016-08-24 | 上海中欧汽车电器有限公司 | There is the distributing shaft of fault tolerance and install the hydraulic hand-pump of this distributing shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG KELI VEHICLE CONTROL SYSTEM CO., LTD. Free format text: FORMER OWNER: ZHEJIANG LIAOYUAN BRAKE HYDRAULIC SYSTEM CO., LTD. Effective date: 20130903 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130903 Address after: 324100 Quzhou Province Economic Development Zone, Jiangshan City, Jiangdong District, Xing Road, No. 29, No. Patentee after: Zhejiang Keli Vehicle Control System Co., Ltd. Address before: 324100 Quzhou Province Economic Development Zone, Jiangshan City, Jiangdong District, Xing Road, No. 29, No. Patentee before: Zhejiang Liaoyuan Brake Hydraulic System Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |