CN201982667U - Cylinder body seal for hydraulic breaking hammer - Google Patents
Cylinder body seal for hydraulic breaking hammer Download PDFInfo
- Publication number
- CN201982667U CN201982667U CN2011201162382U CN201120116238U CN201982667U CN 201982667 U CN201982667 U CN 201982667U CN 2011201162382 U CN2011201162382 U CN 2011201162382U CN 201120116238 U CN201120116238 U CN 201120116238U CN 201982667 U CN201982667 U CN 201982667U
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- seal
- lip
- cylinder body
- sealing
- hydraulic breaking
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Abstract
The utility model relates to a sealing device, in particular to a cylinder body seal for a hydraulic breaking hammer. The cylinder body seal comprises a hermetic seal, a step seal and an enlarged lip-shaped oil seal which are sequentially mounted at the upper part of a cylinder body. The outer seal lip of the lip-shaped oil seal is thicker than the inner seal lip thereof. The lip-shaped oil seal is made of polyurethane rubber. A polytetrafluoroethylene check ring is arranged at the bottom of the lip-shaped oil seal. Compared with the original sealing structure, as the lip-shaped oil seal made of the polyurethane rubber has good elasticity and abrasion resistance, the sealing surfaces are tightly joint, the sealing function is better, the peak impact on the adjacent step seal caused by hydraulic oil is further avoided, the overall sealing service life is prolonged, the maintenance period of the hydraulic breaking hammer is improved, and the working performance is more stable. The cylinder body seal is particularly applicable to large machine type hydraulic breaking hammers.
Description
Technical field
The utility model relates to seal arrangement, relates in particular to the cylinder body sealing that a kind of hydraulic breaking hammer is used.
Background technique
Hydraulic breaking hammer is the equipment by hydraulic oil driving work, working principle of its uniqueness and bad working environment have determined the critical role of sealing system in whole quartering hammer of hydraulic breaking hammer, and sealing solution that quartering hammer adopted and employed oil sealing quality have considerable influence to the quality of hydraulic breaking hammer.The nominal operation oil pressure in quartering hammer when work is 16-18MPa, but the oil pressure peak value that produces during work can be higher than the nominal operation oil pressure far away, and the motion frequency of piston reaches 800-1000 time/minute.All these has proposed very high request to its cylinder body sealing, and cylinder body sealing quality directly affects the workmanship and the life-span of quartering hammer.Especially to smash spoilage higher for cylinder body top oil sealing.
At present, the most cylinder body top oil sealing solution of like product domestic or import is: on the top of cylinder body and the mating face of piston, adopt one hermetic seal, this special envelope of twice to cushion wear-resistant ring with teflon from top to bottom.Though this oil sealing solution can solve sealing problem preferably, but in actual the use, because the wear-resistant ring of buffering is near high pressure oil, because of it can not bear piston motion at a high speed and the very fast damage of high-intensity compression shock, after the wear-resistant ring wearing and tearing of buffering, can cause the quick wearing and tearing of adjacent this special envelope.The damage of these two kinds of oil sealings is main causes in the quartering hammer oil sealing fault, and its average abrasion life-span is about 400 hours.
Oil shock when especially big type hydraulic breaking hammer is worked is bigger, and above-mentioned oil sealing damages more frequent.
The model utility content
The purpose of this utility model provides the cylinder body sealing that a kind of hydraulic breaking hammer is used, to solve the above-mentioned defective of big type hydraulic breaking hammer.
To achieve these goals, the utility model adopts following technological scheme:
The cylinder body sealing that a kind of hydraulic breaking hammer is used comprises one hermetic seal, one this special envelope that is installed on cylinder body top successively and strengthens lip type oil sealing together.The outer seal lip thickness of described lip type oil sealing is greater than interior sealing lip thickness.Described lip type oil sealing is that urethane rubber is made.Bottom at described lip type oil sealing is provided with the teflon back-up ring.
Above scheme is based on the consideration to the material elements of big type hydraulic breaking hammer, oil shock when big type hydraulic breaking hammer is worked is bigger, and the size of oil sealing fixture has been finalized the design, if change oil sealing fixture need change the structure of entire equipment, change greatlyyer, can influence consistency of product and versatility.Therefore adopt the wear-resistant ring of buffering of the alternative existing product of lip oil sealing of ordinary construction, can not make the tangible change of its wear-resisting property because of lip oil sealing thickness low LCL.Also therefore this programme adopts increasing thickening lip type oil sealing and is used in combination with back-up ring, can reach and bear the following pressure of 70MPa, the surge pressure that produces when being higher than quartering hammer work far away.Lip type oil sealing is used in combination with back-up ring that the bottom that makes lip type oil sealing is stressed evenly, serviceability is better.
The beneficial effects of the utility model are: urethane rubber lip type oil sealing has been adopted in first road sealing of next-door neighbour's hydraulic oil in cylinder body, compare with original buffering ring, because urethane rubber lip type oil sealing has favorable elasticity and wear resistance, it is tight that sealing surface is fitted, seal action is better, and then avoided being close to this special envelope and impacted by the peak value of hydraulic oil, prolonged the integral sealing life-span.From practical situation statistics, the sealing replacement cycle can reach about 1000 hours.And, can bear the heat that the piston high-speed friction is produced owing to adopt polyamide resin material with resistance form height rigidity.
Description of drawings
Fig. 1 is a used lip oil sealing section amplification figure of the present utility model;
Fig. 2 is mounting point, a sealed hydraulic quartering hammer of the present utility model cylinder body top partial sectional view;
Fig. 3 is original sealing configuration partial sectional view.
In Fig. 1 one Fig. 3,1, lip type oil sealing, 2, back-up ring, 3, this special envelope, 4, hermetic seal, 5, cylinder body top, 6, outer seal lip, 7, interior sealing lip, 8, cushion wear-resistant ring.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated:
As shown in figures 1 and 3, the cylinder body sealing that a kind of hydraulic breaking hammer is used comprises one hermetic seal 4, one this special envelope 3 that is installed on cylinder body top 5 successively and strengthens lip type oil sealing 1 together.Outer seal lip 6 thickness of described lip type oil sealing 1 are greater than interior sealing lip 7 thickness.Described lip type oil sealing 1 is made for urethane rubber.Bottom at described lip type oil sealing 1 is provided with teflon back-up ring 2.
Claims (3)
1. cylinder body sealing that hydraulic breaking hammer is used, comprise one hermetic seal (4) that is installed on cylinder body top (5) successively, one this special envelope (3), it is characterized in that: also comprise the lip type that strengthens the together oil sealing (1) that is installed on described this special envelope (3) bottom, be provided with back-up ring (2) in the bottom of described lip type oil sealing (1).
2. the cylinder body sealing that a kind of hydraulic breaking hammer according to claim 1 is used, it is characterized in that: outer seal lip (6) thickness of described lip type oil sealing (1) is greater than the thickness of interior sealing lip (7).
3. the cylinder body sealing that a kind of hydraulic breaking hammer according to claim 1 and 2 is used, it is characterized in that: described lip type oil sealing (1) is the urethane rubber oil sealing, and described back-up ring is the teflon back-up ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201162382U CN201982667U (en) | 2011-04-08 | 2011-04-08 | Cylinder body seal for hydraulic breaking hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201162382U CN201982667U (en) | 2011-04-08 | 2011-04-08 | Cylinder body seal for hydraulic breaking hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201982667U true CN201982667U (en) | 2011-09-21 |
Family
ID=44610129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201162382U Expired - Lifetime CN201982667U (en) | 2011-04-08 | 2011-04-08 | Cylinder body seal for hydraulic breaking hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201982667U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307282A (en) * | 2012-03-07 | 2013-09-18 | 株式会社水山重工业 | An oil leakage prevention apparatus of piston for a breaker |
| CN110219334A (en) * | 2019-04-02 | 2019-09-10 | 台州贝力特机械有限公司 | A kind of hydraulic breaking hammer |
| CN112643299A (en) * | 2020-12-30 | 2021-04-13 | 江苏力博士机械股份有限公司 | Grinding quality guarantee method for large piston of hydraulic breaking hammer |
| CN112726707A (en) * | 2020-12-30 | 2021-04-30 | 江苏力博士机械股份有限公司 | Hydraulic breaking hammer piston ring improvement process |
-
2011
- 2011-04-08 CN CN2011201162382U patent/CN201982667U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307282A (en) * | 2012-03-07 | 2013-09-18 | 株式会社水山重工业 | An oil leakage prevention apparatus of piston for a breaker |
| CN110219334A (en) * | 2019-04-02 | 2019-09-10 | 台州贝力特机械有限公司 | A kind of hydraulic breaking hammer |
| CN110219334B (en) * | 2019-04-02 | 2024-05-14 | 台州贝力特机械有限公司 | Hydraulic breaking hammer |
| CN112643299A (en) * | 2020-12-30 | 2021-04-13 | 江苏力博士机械股份有限公司 | Grinding quality guarantee method for large piston of hydraulic breaking hammer |
| CN112726707A (en) * | 2020-12-30 | 2021-04-30 | 江苏力博士机械股份有限公司 | Hydraulic breaking hammer piston ring improvement process |
| CN112726707B (en) * | 2020-12-30 | 2022-04-26 | 江苏力博士机械股份有限公司 | Hydraulic breaking hammer piston ring improvement process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121016 Address after: 264006 the Qinhuai River Road, Yantai economic and Technological Development Zone, Shandong 189, China Patentee after: Yantai Eddie Precision Machinery Co., Ltd. Address before: 264006 No. 189, the Qinhuai River Road, Yantai economic and Technological Development Zone, Shandong Patentee before: Yantai Eddie Precision Machinery Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |
|
| CX01 | Expiry of patent term |