CN201043522Y - Sealing device for high-pressure gear pump - Google Patents
Sealing device for high-pressure gear pump Download PDFInfo
- Publication number
- CN201043522Y CN201043522Y CNU2007200201330U CN200720020133U CN201043522Y CN 201043522 Y CN201043522 Y CN 201043522Y CN U2007200201330 U CNU2007200201330 U CN U2007200201330U CN 200720020133 U CN200720020133 U CN 200720020133U CN 201043522 Y CN201043522 Y CN 201043522Y
- Authority
- CN
- China
- Prior art keywords
- ring
- seal ring
- gear pump
- sealing
- rectangular section
- 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 relates to a sealing device used by a high-pressure gear pump in a hydraulic system. The utility model combines an Omega-shaped sealing ring with an O-shaped ring together to form an integrative sealing ring with a rectangular section, which is mounted in the sealing groove of the plane of the end cover of the gear pump and thoroughly separates a high-pressure zone from a low-pressure zone. The part of the sealing ring with a rectangular section, which is contacted with the inner side of the sealing groove, is made as a step, on which a teflon blocking ring is placed, and the lip of the inner side of the sealing ring with a rectangular section is separated from the edge of the inner side of the sealing groove. Because the flexibility of the blocking ring is good, the lip of the sealing ring with a rectangular section can be prevented from abrasion, thus prolonging the lifespan of the sealing ring with a rectangular section by ten times and therefore notably prolonging the service life of the gear pump.
Description
Affiliated technical field
The utility model relates to the seal arrangement that a kind of gear pump that is used for hydraulic system is used.
Background technique
Present gear pump structure mostly is the structure that adopts a pair of floating buss compensation end clearance, promptly by the seal ring of " ω " shape rectangular cross-section in the two axle sleeve exterior edge face seal grooves and the high pressure oil effect outside the seal ring, two axle sleeve inner ends and gear face are close together, high pressure oil with the sealing gear face prevents face leakage.In the seal groove of gear pump case both ends of the surface, there is round section joint ring to be used for sealed high pressure oil, prevents leakage of oil between the pump housing and the pump cover junction plane (on also having the front and rear covers of this " O " circle design at gear pump, effect is the same).The shortcoming one of this structure is 4 planes that requirement gear pump front and rear covers combines with pump housing both ends of the surface, its planeness requires strict, planeness control is bad, will between round section joint ring and " ω " shape seal ring, the slit be arranged, the high pressure oil (being the zone of high pressure) of " ω " shape seal ring periphery will be got back to the inside (being low pressure area) of " ω " shape seal ring by this slit, forms an internal leakage passage, influences the volumetric efficiency of pump, gear pump pressure is high more, leaks big more; The 2nd, gear pump is because design has axial clearance, and it is shorter than the length of entire pump topic that promptly two floating buss thickness add the thickness that cogs, when axle sleeve expands when preventing worst hot case and gear is acutely rubbed with axle sleeve pump is damaged.Make the front and rear covers junction plane of axle sleeve exterior edge face and pump that certain interval is arranged like this, " ω " shape seal ring is under the repeated stock of high pressure oil, make the inboard lip of " ω " shape seal ring seal notch edges quilt " cutting " repeatedly, because sealing notch hardness height, and seal ring hardness is low, makes the inboard lip of " ω " shape seal ring be irregular fragmentation, the very fast damage of seal ring, cause high pressure oil to leak, have a strong impact on the life-span of gear pump.
Summary of the invention
In order to improve the volumetric efficiency of gear pump, prolong the working life of gear pump, the utility model provides a kind of seal arrangement, can effectively overcome the problems referred to above.
For achieving the above object, the utility model combines " ω " shape seal ring and round section joint ring, be made of one the rectangular cross-section seal ring (2) of formula, be installed in the seal groove on gear pump end cap (6) plane, by the rectangular cross-section seal ring zone of high pressure and low pressure area are thoroughly separated, promptly having stopped " ω " shape seal ring low pressure area has the situation of opening, can thoroughly solve because the internal leakage that gear pump end cap (6) and pump housing two ends junction plane flatness error cause, thereby make that the technology capability on these several planes is better.
In addition for preventing that the inboard lip of rectangular cross-section seal ring (2) from damaging in early days; prolong rectangular cross-section seal ring (2) working life; in the inboard contact position of rectangular cross-section seal ring (2) and seal groove seal ring made step type; on the seal ring step of rectangular cross-section, put a teflon back-up ring (3); the inboard cutting edge of inboard lip of rectangular cross-section seal ring (2) and seal groove is separated; because this back-up ring (3) pliability is good; can protect rectangular cross-section seal ring (2) lip not wear and tear; thereby the life-span that can prolong the rectangular cross-section seal ring reaches tens times, the working life of significant prolongation gear pump.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description: this integral sealing circle can both be made by the factory of doing Sealing, as long as with Cutter Body Processing with Machining Center one mold, just be easy to realize.Seal groove on the front and rear covers can obtain with processing such as numerical control milling machine or engraving machines.The general Sealing factory of teflon back-up ring can with polytetrafluorethylepowder powder after compression moulding on the mould again sintering obtain.Above parts machining process is very simple, and is easy to make.
Claims (2)
1. a high-pressure gear Sealing used for pump is made of rectangular cross-section seal ring (2) and back-up ring (3), it is characterized in that: " ω " shape seal ring and round section joint ring are combined, be made of one the rectangular cross-section seal ring (2) of formula.
2. high-pressure gear Sealing used for pump, it is characterized in that: in the inboard contact position of seal ring (2) and seal groove seal ring made step type, on the seal ring step, put the back-up ring (3) of a teflon, inboard lip of seal ring and the inboard cutting edge of seal groove are separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200201330U CN201043522Y (en) | 2007-04-06 | 2007-04-06 | Sealing device for high-pressure gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200201330U CN201043522Y (en) | 2007-04-06 | 2007-04-06 | Sealing device for high-pressure gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201043522Y true CN201043522Y (en) | 2008-04-02 |
Family
ID=39258416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200201330U Expired - Fee Related CN201043522Y (en) | 2007-04-06 | 2007-04-06 | Sealing device for high-pressure gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201043522Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425544A (en) * | 2011-12-20 | 2012-04-25 | 淮安市胜杰液压机械有限公司 | High pressure gear pump |
| CN108223368A (en) * | 2018-03-14 | 2018-06-29 | 太重榆液长治液压有限公司 | Water conservancy diversion end face seal slot |
| CN108266418A (en) * | 2018-03-23 | 2018-07-10 | 泸州众大科技液压件有限公司 | A kind of sealing structure between combined sheet type multiple directional control valve valve block |
-
2007
- 2007-04-06 CN CNU2007200201330U patent/CN201043522Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425544A (en) * | 2011-12-20 | 2012-04-25 | 淮安市胜杰液压机械有限公司 | High pressure gear pump |
| CN108223368A (en) * | 2018-03-14 | 2018-06-29 | 太重榆液长治液压有限公司 | Water conservancy diversion end face seal slot |
| CN108266418A (en) * | 2018-03-23 | 2018-07-10 | 泸州众大科技液压件有限公司 | A kind of sealing structure between combined sheet type multiple directional control valve valve block |
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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: 20080402 |