CN201437779U - Cylinder and oil piston sealing structure and screw compressor - Google Patents
Cylinder and oil piston sealing structure 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
- Authority
- CN
- China
- Prior art keywords
- cylinder
- soft metal
- sealing structure
- seal ring
- oily
- 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
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 38
- 239000003643 water by type Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 abstract 2
- 239000010725 compressor oil Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The utility model provides a cylinder and oily piston seal structure, include: the oil piston is movably arranged in the cylinder; and the soft metal sealing ring is arranged between the cylinder and the oil piston. The utility model also provides a screw compressor, it includes preceding cylinder and oily piston seal structure. The utility model discloses having improved screw compressor oil piston's sealing performance greatly, having improved screw compressor's capacity adjusting device's reliability, also having simplified the assembly process simultaneously, reduced the assembly requirement.
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 | Cylinder and oil piston sealing structure and screw compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009201697703U CN201437779U (en) | 2009-08-26 | 2009-08-26 | Cylinder and oil piston sealing structure 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 | Cylinder and oil piston sealing structure 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 |