CN201851304U - Piston assembly used in screw compressor and compressor using same - Google Patents
Piston assembly used in screw compressor and compressor using same Download PDFInfo
- Publication number
- CN201851304U CN201851304U CN2010205700394U CN201020570039U CN201851304U CN 201851304 U CN201851304 U CN 201851304U CN 2010205700394 U CN2010205700394 U CN 2010205700394U CN 201020570039 U CN201020570039 U CN 201020570039U CN 201851304 U CN201851304 U CN 201851304U
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- piston
- seal ring
- cylinder body
- compressor
- screw compressor
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Abstract
The utility model discloses a piston assembly used in a screw compressor and a compressor using same. The piston assembly comprises a cylinder body, a piston and a sealing ring, wherein the piston is arranged in the cylinder body, the sealing ring is arranged at the circumferential edge of the piston, the sealing ring is matched with the inner wall of the cylinder body, the circumferential edge of the piston is provided with a single placing groove, and the single sealing ring is placed in the placing groove. In the utility model, differential pressure needed in loading and unloading of the compressor is effectively reduced, and loading and unloading range of the compressor is expanded.
Description
Technical field
The utility model relates to a kind of screw compressor with piston assembly and use the compressor of this assembly.
Background technique
For existing helical-lobe compressor, often appearance can not normal load, the situation of unloading, perhaps load, unload phenomenon such as have some setbacks, because most of piston assembly adopts multiple-sealed ring, simultaneously because the outside dimension of seal ring is difficult to effectively assurance, cause the resistance to motion of piston assembly excessive, and piston assembly need ability normal load, unloading under the situation of big pressure reduction.
Summary of the invention
The purpose of this utility model is to overcome the defective of prior art, provide a kind of screw compressor with piston assembly and use the compressor of this assembly, required pressure reduction when the utility model has effectively reduced compressor loads, unloading has been expanded the scope of compressor loads, unloading.
Its technological scheme is as follows: a kind of screw compressor piston assembly, comprise cylinder body, piston, seal ring, piston is located in the cylinder body, seal ring is located at the circumferential edges of piston, seal ring cooperates with the inwall of cylinder body, circumferential edges at described piston is provided with single standing groove, and described seal ring only is single, and seal ring places in the standing groove.
A kind of screw compressor, comprise piston assembly, this piston assembly comprises cylinder body, piston, seal ring, piston is located in the cylinder body, and seal ring is located at the circumferential edges of piston, and seal ring cooperates with the inwall of cylinder body, it is characterized in that, circumferential edges at described piston is provided with single standing groove, and described seal ring only is single, and seal ring places in the standing groove.
Technological scheme to the further refinement of aforementioned techniques scheme describes below.
Described piston comprises piston main body, sealing plate and connecting nail, and sealing plate is connected with described piston main body by connecting nail, piston main body circumferential edges and sealing plate form described standing groove between the adjoining edge.
There is matching gap between the excircle of described seal ring and the inwall of described cylinder body.
Described matching gap is between 0.01 millimeter to 0.08 millimeter.
In sum, the utlity model has following advantage.
1, owing to the seal ring of being located at the piston circumferential outer edge only is single, effectively reduced the area of contact between seal ring and the inboard wall of cylinder block, interference when avoiding a plurality of seal rings to contact with thumb in the cylinder body, the more important thing is, owing to adopt single seal ring, add man-hour easier assurance seal ring and inboard wall of cylinder block between precision, further reduced the resistance that moves between piston and the cylinder body, the load when alleviating compressor operating.
2, piston adopts fabricated structure, processes the outside dimension of seal ring after assembling is finished on precision machine tool, can effectively control the size of seal ring, has reduced the resistance of piston in movement process.
3, the gap between optimal design seal ring and the inboard wall of cylinder block, and avoid seal ring directly to contact with inboard wall of cylinder block, the gap location between seal ring and the inboard wall of cylinder block forms oil film and plays seal action, effectively reduces the resistance between piston and the cylinder body.
Description of drawings
Fig. 1 is among the utility model embodiment, the described screw compressor structural drawing of piston assembly.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 is the structural drawing that adopts the compressor of embodiment's one described piston assembly.
Description of reference numerals: 1, cylinder body, 2, piston, 3, seal ring, 4, piston main body, 5, sealing plate, 6, connecting nail, 7, matching gap.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
Embodiment one, as shown in Figure 1 and Figure 2, present embodiment has been put down in writing a kind of screw compressor piston assembly, comprise cylinder body 1, piston 2, seal ring 3, piston 2 is located in the cylinder body 1, and seal ring 3 is located at the circumferential edges of piston 2, seal ring 3 cooperates with the inwall of cylinder body 1, circumferential edges at described piston 2 is provided with single standing groove, and described seal ring 3 only is single, and seal ring 3 places in the standing groove.
Wherein, described piston 2 comprises piston main body 4, sealing plate 5 and connecting nail 6, sealing plate 5 is connected with piston main body 4 by connecting nail 6, form described standing groove between the adjoining edge of piston main body 4 circumferential edges and sealing plate 5, there is matching gap 7 between the inwall of the excircle of seal ring 3 and cylinder body 1, this matching gap 7 is between 0.01 millimeter to 0.08 millimeter, is preferably between 0.012 millimeter to 0.069 millimeter.
In sum, the utlity model has following advantage.
1, owing to the seal ring 3 of being located at piston 2 circumferential outer edge only is single, effectively reduced the area of contact between seal ring 3 and cylinder body 1 inwall, interference when avoiding a plurality of seal rings 3 to contact with thumb in the cylinder body 1, the more important thing is, owing to adopt single seal ring 3, add man-hour easier assurance seal ring 3 and cylinder body 1 inwall between precision, further reduced between piston 2 and the cylinder body 1 resistance of operation, the load when alleviating compressor operating.
2, piston 2 adopts fabricated structure, processes the outside dimension of seal ring 3 after assembling is finished on precision machine tool, can effectively control the size of seal ring 3, has reduced the resistance of piston 2 in movement process.
3, the gap between optimal design seal ring 3 and cylinder body 1 inwall, and avoid seal ring 3 directly to contact with cylinder body 1 inwall, gap location between seal ring 3 and cylinder body 1 inwall forms oil film and plays seal action, effectively reduces the resistance between piston 2 and the cylinder body 1.
Embodiment two, and as shown in Figure 3, present embodiment is the structural drawing of the compressor of the described piston assembly of employing embodiment, other structure of these parts is same as the prior art, after present embodiment adopted embodiment's one described piston assembly, its principle was described identical with embodiment one with advantage, repeats no more herein.
Only be specific embodiment of the utility model below, do not limit protection domain of the present utility model with this; Any replacement and the improvement done on the basis of not violating the utility model design all belong to protection domain of the present utility model.
Claims (8)
1. screw compressor piston assembly, comprise cylinder body, piston, seal ring, piston is located in the cylinder body, seal ring is located at the circumferential edges of piston, seal ring cooperates with the inwall of cylinder body, it is characterized in that, is provided with single standing groove at the circumferential edges of described piston, described seal ring only is single, and seal ring places in the standing groove.
2. screw compressor piston assembly according to claim 1, it is characterized in that, described piston comprises piston main body, sealing plate and connecting nail, and sealing plate is connected with described piston main body by connecting nail, piston main body circumferential edges and sealing plate form described standing groove between the adjoining edge.
3. screw compressor piston assembly as claimed in claim 1 or 2 is characterized in that, has matching gap between the excircle of described seal ring and the inwall of described cylinder body.
4. as screw compressor piston assembly as described in the claim 3, it is characterized in that described matching gap is between 0.01 millimeter to 0.08 millimeter.
5. screw compressor, comprise piston assembly, this piston assembly comprises cylinder body, piston, seal ring, piston is located in the cylinder body, and seal ring is located at the circumferential edges of piston, and seal ring cooperates with the inwall of cylinder body, it is characterized in that, circumferential edges at described piston is provided with single standing groove, and described seal ring only is single, and seal ring places in the standing groove.
6. as screw compressor as described in the claim 5, it is characterized in that, described piston comprises piston main body, sealing plate and connecting nail, and sealing plate is connected with described piston main body by connecting nail, piston main body circumferential edges and sealing plate form described standing groove between the adjoining edge.
7. as screw compressor as described in claim 5 or 6, it is characterized in that, have matching gap between the excircle of described seal ring and the inwall of described cylinder body.
8. as screw compressor as described in the claim 7, it is characterized in that described matching gap is between 0.01 millimeter to 0.08 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205700394U CN201851304U (en) | 2010-10-21 | 2010-10-21 | Piston assembly used in screw compressor and compressor using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205700394U CN201851304U (en) | 2010-10-21 | 2010-10-21 | Piston assembly used in screw compressor and compressor using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201851304U true CN201851304U (en) | 2011-06-01 |
Family
ID=44093699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205700394U Expired - Lifetime CN201851304U (en) | 2010-10-21 | 2010-10-21 | Piston assembly used in screw compressor and compressor using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201851304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542091A (en) * | 2012-07-10 | 2014-01-29 | 珠海格力电器股份有限公司 | Sealing ring and screw compressor with same |
-
2010
- 2010-10-21 CN CN2010205700394U patent/CN201851304U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542091A (en) * | 2012-07-10 | 2014-01-29 | 珠海格力电器股份有限公司 | Sealing ring and screw compressor with same |
| CN103542091B (en) * | 2012-07-10 | 2016-04-13 | 珠海格力电器股份有限公司 | Seal ring and there is the helical-lobe compressor of sealing ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110601 |
|
| CX01 | Expiry of patent term |