CN201437779U - Sealing structure for air cylinder and oil piston and screw compressor - Google Patents
Sealing structure for air cylinder and oil piston and screw compressor Download PDFInfo
- Publication number
- CN201437779U CN201437779U CN2009201697703U CN200920169770U CN201437779U CN 201437779 U CN201437779 U CN 201437779U CN 2009201697703 U CN2009201697703 U CN 2009201697703U CN 200920169770 U CN200920169770 U CN 200920169770U CN 201437779 U CN201437779 U CN 201437779U
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- cylinder
- sealing structure
- seal ring
- soft metal
- oily
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Abstract
The utility model provides a sealing structure for an air cylinder and an oil piston, which comprises an air cylinder, an oil piston movably arranged in the air cylinder and a soft metallic seal ring arranged between the air cylinder and the oil piston. The utility model further provides a screw compressor comprising the sealing structure for the air cylinder and the oil piston. By adopting the utility model, the sealing performance of the oil piston of the screw compressor is greatly improved, the reliability of a volume adjustment device of the screw compressor is improved, and at the same time, the assembling process is simplified, and the assembling requirements are lowered.
Description
Technical field
The utility model relates to compressor field, in particular to cylinder and oily piston sealing structure and helical-lobe compressor.
Background technique
Present cooling cylinder of compressor and oily piston sealing structure are set in oily outside piston perimeter surface with PTFE anti-wear ring 1 and o type circle 2 usually, as shown in Figure 1, and match with the cylinder inner circumferential surface, thereby reach the effect of sealing.
The inventor finds that there are the following problems at least in the prior art: existing cylinder and oily piston sealing structure, adopted PTFE anti-wear ring 1 and o type circle 2 to be set in the method for oily outside piston perimeter surface, cause the cylinder surfaces damage easily, thereby cause the illusive problem of sealing.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of cylinder and oily piston sealing structure, can solve the easy damaged of cylinder surfaces of prior art, seals illusive problem.
Provide a kind of cylinder and oily piston sealing structure at the utility model, having comprised: cylinder and the oily piston that is movably arranged in the cylinder; The soft metal seal ring is arranged between cylinder and the oily piston.
Preferably, oily outside piston perimeter surface is processed with screw thread or groove, and the soft metal seal ring waters and casts from screw thread or the groove.
Preferably, the soft metal is a Babbitt, and the soft metal seal ring is the Babbitt seal ring.
Preferably, the soft metal seal ring cooperates with cylinder gap.
Embodiment of the present utility model also provides a kind of helical-lobe compressor, comprises foregoing cylinder and oily piston sealing structure.
Because adopted the soft metal seal ring that is arranged on oily outside piston perimeter surface, its hardness is lower, has overcome the easy damaged of cylinder surfaces in the prior art, seals illusive problem, and then reaches the effect of good seal and raising assembly quality.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 has schematically shown existing cylinder and oily piston sealing structure;
Fig. 2 has schematically shown according to the utility model embodiment's cylinder and oily piston sealing structure.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 2 has schematically shown according to the utility model embodiment's cylinder and oily piston sealing structure.As shown in the figure, cylinder and oily piston sealing structure according to the utility model embodiment comprise:
Preferably, soft metal seal ring 5 and cylinder 3 Spielpassung are so that oily piston moves in cylinder.External peripheral surface by Vehicle Processing soft metal seal ring 5 is to reach the designing requirement size, can guarantee that soft metal seal ring 5 outer ring sizes and design size keep accurately consistent, the effective like this gap size of soft metal seal ring 5 of having controlled with cylinder 3, reach the assembly error that reduces personal factor, simplify assembling, enhance productivity, improve the effect of reliability.
Preferably, oily piston 4 external peripheral surfaces are processed with screw thread 6 or groove, and soft metal seal ring 5 waters and casts from screw thread 6 or the groove.Screw thread 4 or groove can make the adhesion of soft metal seal ring 5 and oily piston 6 in the casting increase, to guarantee the steadiness of soft metal seal ring 5 and oily piston 4 sealings.
Embodiment of the present utility model also provides a kind of helical-lobe compressor, comprises foregoing cylinder and oily piston sealing structure.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
Cylinder of the present utility model and oily piston sealing structure, adopted the soft metal seal ring that is arranged on oily outside piston perimeter surface, and because the hardness of soft metal seal ring is low, can not produce scratch to cylinder and soft metal seal ring contact surface, and utilize that soft metal seal ring thermal expansion coefficient is little, advantage that the oil resistant fluoride tolerance can be good, overcome the easy damaged of cylinder surfaces in the prior art, sealed illusive problem, improved the sealability and the reliability of cylinder and oily piston sealing structure.Again because the external peripheral surface by Vehicle Processing soft metal seal ring is to reach the designing requirement size, can guarantee that seal ring outer ring, soft metal size and design size keep accurately consistent, effectively controlled the gap size of soft metal seal ring and cylinder, solved in the prior art because cylinder and oily piston sealing structure assembling difficulty, perhaps iris out existing performance issue owing to be set in the wear ring or the o type of oily piston, and cylinder that causes and oily piston sealing structure often add problems such as unloading fault, reach and simplify assembling, reduce the effect of the assembly error of personal factor.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. a cylinder and oily piston sealing structure is characterized in that, comprising:
Cylinder and the oily piston that is movably arranged in the described cylinder;
The soft metal seal ring is arranged between described cylinder and the described oily piston.
2. cylinder according to claim 1 and oily piston sealing structure is characterized in that, described oily outside piston perimeter surface is processed with screw thread or groove, and described soft metal seal ring waters and casts from described screw thread or the groove.
3. cylinder according to claim 1 and oily piston sealing structure is characterized in that, described soft metal is a Babbitt, and described soft metal seal ring is the Babbitt seal ring.
4. cylinder according to claim 1 and oily piston sealing structure is characterized in that, described soft metal seal ring cooperates with described cylinder gap.
5. a helical-lobe compressor is characterized in that, comprises according to each described cylinder and oily piston sealing structure in the claim 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201697703U CN201437779U (en) | 2009-08-26 | 2009-08-26 | Sealing structure for air cylinder and oil piston and screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201697703U CN201437779U (en) | 2009-08-26 | 2009-08-26 | Sealing structure for air cylinder and oil piston and screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201437779U true CN201437779U (en) | 2010-04-14 |
Family
ID=42399753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201697703U Expired - Fee Related CN201437779U (en) | 2009-08-26 | 2009-08-26 | Sealing structure for air cylinder and oil piston and screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201437779U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322413A (en) * | 2011-08-30 | 2012-01-18 | 重庆耐德燃气设备有限公司 | Hydraulic oil piston type natural gas sub-station compressor |
| WO2012113350A1 (en) * | 2011-02-25 | 2012-08-30 | Neo Mechanics Limited | Coiled felt seal(cfs) sealed piston of hydraulic cylinder |
-
2009
- 2009-08-26 CN CN2009201697703U patent/CN201437779U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012113350A1 (en) * | 2011-02-25 | 2012-08-30 | Neo Mechanics Limited | Coiled felt seal(cfs) sealed piston of hydraulic cylinder |
| CN102322413A (en) * | 2011-08-30 | 2012-01-18 | 重庆耐德燃气设备有限公司 | Hydraulic oil piston type natural gas sub-station compressor |
| CN102322413B (en) * | 2011-08-30 | 2013-06-19 | 重庆耐德能源装备集成有限公司 | Hydraulic oil piston type natural gas sub-station compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100414 Termination date: 20170826 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |