CN201386647Y - Piston sealing structure of vertical unlubricated piston compressor - Google Patents
Piston sealing structure of vertical unlubricated piston compressor Download PDFInfo
- Publication number
- CN201386647Y CN201386647Y CN200820230990U CN200820230990U CN201386647Y CN 201386647 Y CN201386647 Y CN 201386647Y CN 200820230990 U CN200820230990 U CN 200820230990U CN 200820230990 U CN200820230990 U CN 200820230990U CN 201386647 Y CN201386647 Y CN 201386647Y
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- piston
- guide ring
- ring
- sealing structure
- lubrication
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Abstract
The utility model relates to a piston sealing structure of a vertical unlubricated piston compressor used in the vertical unlubricated piston compressor, which comprises a guide ring and a piston ring which are sleeved on a piston. The utility model is characterized in that the action end of the piston is provided with the guide ring the outer ring of which is provided with a labyrinth groove. In the use process, the service life of the piston ring of the prior art is generally about half a year and the longest service life is not more than one year. In the use process of the utility model, the service life of the piston ring is generally improved by 30 percent to 50 percent, even more than 100 percent. The utility model has the advantages of prolonging the service life of the piston ring and ensuring the long-term safe running of the compressor.
Description
Technical field
The utility model relates to a kind of piston sealing structure of vertical non-lubrication piston compressor that uses in the vertical non-lubrication piston compressor.
Background technique
Piston and cylinder cooperate the formation minimum cylinder volume, and it is especially important that the sealing between piston and cylinder just seems.Performances such as its sealing, durability, reliability and friction wasted work all need to take into full account.In vertical non-lubrication piston compressor conventional design, adopt the structure of on piston, arranging one guide ring (integrated type) and several roads piston rings (open type) usually, as shown in Figure 1.Guide ring plays the centering effect, and piston ring seals, and adopts several roads piston ring to depend on the seal pressure differential of piston.This structural design is fairly simple, and the centering of cylinder and piston requires lower, so manufacture cost is lower, installs also more convenient.This structure is because the gap of guide ring and cylinder is bigger, and coaxality is lower, in actual use, often the life-span of guide ring longer, and the life-span of piston ring is shorter relatively.
In the vertical non-lubrication piston compressor of import, also have two kinds of more typical structures, a kind of is the labyrinth compressor that Switzerland Suhl longevity company produces, and all has many maze troughs on cylinder and the piston, as shown in Figure 2.Utilize the continuous throttling of gas in maze trough, thereby reach efficient sealing effect.Another kind is the T type cross section sealing ring that Linde Co produces, and as shown in Figure 3, is used for combined piston.The domain has a straight cut, the T type cross section ring 9 and the very little radial clearance δ of existence between the ring 6 that spaces.During work, the phase I, the sealing of piston ring promptly relies on gas pressure with compensation principle is identical with the conventional piston ring automatically.8 is guide ring, and 7 is expansion ring; After the ring wearing and tearing reach δ=0, enter second stage, encircle the restriction of convex shoulder owing to space, piston ring can not expand outwardly with the compensation abrasion again.This moment, the sealing principle of piston ring became the effect of main dependence throttling labyrinth.Other also has some similar structure.Though these structures have solved certain long-term safety operation problem,, promptly require cylinder and piston that good coaxality must be arranged because these structural requirement pistons must have good guiding.Therefore manufacture difficulty and manufacture cost have been increased greatly.Owing to making reason, these two kinds of structures at present at home manufactory seldom adopt.
In addition, also have some other corrective measure, purpose mainly is the operating temperature for seal pressure differential that reduces piston ring and piston ring.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of guide ring throttling action that both play the guiding role that makes is provided, thereby reduce the seal pressure differential of piston ring, prolong the working life of piston ring, guarantee the piston sealing structure of vertical non-lubrication piston compressor of compressor long-term safety operation.
The purpose of this utility model is achieved in that and comprises guide ring and the piston ring that is sleeved on the piston, it is characterized in that: the effect end at piston is provided with guide ring, and is processed with maze trough on the outer ring of guide ring.
Being provided with guide ring at the effect end of piston is meant on the top and bottom circumferential surface at the piston 4 of garden cylindricality and respectively is set with a guide ring.
The thickness of described guide ring is greater than the thickness of conventional guide ring.Described piston ring quantity and structure are constant.
Between guide ring and cylinder, be provided with and guarantee that guide ring had not only play the guiding role but also plays the thermal gap of throttling action, guarantee that promptly guide ring in working order down and cylinder maintenance less clearance.
Described guide ring and piston ring are selected the filled polytetrafluoroethylene material for use.
Described guide ring is an overall thermal shell type guide ring.
Maze trough is the groove of similar 60 ° of V thread screws.
According to the size of piston, the maze trough of processing on the outer ring of guide ring is 3～10 grooves, and groove depth is got 1～1.5mm, and pitch of grooves is got 1～3mm.
The utlity model has following good effect:
The various structures of the comprehensive domestic and international vertical non-lubricated compressor of the utility model are by improving the sealing configuration between piston and cylinder, in the improvement of guide ring, adopt overall thermal shell type guide ring in conventional construction, respectively establish one at the piston upper and lower end, piston ring quantity and structure are constant.Suitably increase the thickness of guide ring, and process the maze trough of some in the guide ring outer ring, get suitable thermal gap between guide ring and cylinder.Purpose is that guide ring is not only play the guiding role but also play throttling action, thereby reduces the seal pressure differential of piston ring, prolongs the working life of piston ring, guarantees the operation of compressor long-term safety.If it is better with filler polytetrafluorethyleguide guide ring and piston ring effect that the import quality raw materials are made.This structure is compared with same conventional structure (as Fig. 1) on the cost than being easier in manufacture difficulty and is realized.In use, the working life of the piston ring of prior art, generally all about half a year, the longest also was no more than 1 year.And the utility model generally can both improve 30% to 50% the working life of piston ring in the using process of vertical non-lubrication piston compressor, have in addition improve more than 100%.
Description of drawings
Fig. 1 is guide ring and piston ring packing structure on the piston of existing vertical non-lubrication piston compressor.
Fig. 2 is the cylinder of the vertical non-lubrication piston compressor of import and the labyrinth slot type sealing configuration on the piston.
Fig. 3 is the T type cross section sealing ring type sealing configuration of the vertical non-lubrication piston compressor of import.
Fig. 4 is a structural representation of the present utility model, and the figure on the right is the structure enlarged view of the guide ring among the figure on the left side.
Fig. 5 is the structure enlarged view of the guide ring of Fig. 4.
Embodiment
Shown in Fig. 4,5, embodiment 1: the utility model comprises guide ring 5 and the piston ring 3 that is sleeved on the piston 4, it is characterized in that: the effect end at piston 4 is provided with a guide ring 5, and is processed with maze trough on the outer ring of guide ring 5.Being provided with guide ring at the effect end of piston is meant on the upper end circumferential surface at the piston 4 of garden cylindricality and is set with a guide ring.
The thickness of described guide ring 5 is greater than the thickness of conventional guide ring.Between guide ring 5 and cylinder 2, be provided with and guarantee that guide ring had not only play the guiding role but also plays the thermal gap of throttling action, guarantee that promptly guide ring in working order down and cylinder maintenance less clearance.Described guide ring 5 and piston ring 3 are selected the filled polytetrafluoroethylene material for use.Described guide ring 5 is an overall thermal shell type guide ring.Maze trough is the groove of similar 60 ° of V thread screws.The figure on the right is the structure enlarged view of the guide ring among the figure on the left side among Fig. 4.The groove of figure intermediate cam shape screw thread is a maze trough.According to the size of piston, the maze trough of processing on the outer ring of guide ring 5 is 3～10 grooves, and groove depth is got 1～1.5mm, and pitch of grooves is got 1～3mm.
As shown in Figure 4, embodiment 2: the utility model comprises guide ring 5 and the piston ring 3 that is sleeved on the piston 4, it is characterized in that: the effect end at piston 4 respectively is provided with a guide ring 5, and is processed with maze trough on the outer ring of guide ring 5.Being provided with guide ring at the effect end of piston is meant on the top and bottom circumferential surface at the piston 4 of garden cylindricality and respectively is set with a guide ring 5.
The thickness of described guide ring 5 is greater than the thickness of conventional guide ring.Between guide ring 5 and cylinder 2, be provided with and guarantee that guide ring had not only play the guiding role but also plays the thermal gap of throttling action, guarantee that promptly guide ring in working order down and cylinder maintenance less clearance.Described guide ring 5 and piston ring 3 are selected the filled polytetrafluoroethylene material for use.Described guide ring 5 is an overall thermal shell type guide ring.Maze trough is the groove of similar 60 ° of V thread screws.The figure on the right is the structure enlarged view of the guide ring among the figure on the left side among Fig. 4.The groove of figure intermediate cam shape screw thread is a maze trough.According to the size of piston, the maze trough of processing on the outer ring of guide ring 5 is 3～10 grooves, and groove depth is got 1～1.5mm, and pitch of grooves is got 1～3mm.
Suitably increase the thickness of guide ring, and process the maze trough of some in the guide ring outer ring, get suitable thermal gap between guide ring and cylinder.Purpose is that guide ring is not only play the guiding role but also play throttling action, thereby reduces the seal pressure differential of piston ring, prolongs the working life of piston ring, guarantees the operation of compressor long-term safety.If it is better with filler polytetrafluorethyleguide guide ring and piston ring effect that the import quality raw materials are made.This structure same conventional structure (as Fig. 1) on manufacture difficulty and cost is basic identical, realizes than being easier to.
Because the guide ring cylindrical will process maze trough, the thickness of described guide ring 5 will be a bit larger tham the thickness of conventional guide ring, guarantees that promptly guide ring 5 has enough intensity.The quantity and the structure of described piston ring 3 are constant.The described maze trough of processing on the outer ring of guide ring 5 according to the size of piston, is generally 3～10 grooves.Piston diameter is big, and the guide ring height is just high, and annular groove is just many relatively, and piston diameter is little, and the guide ring height is just little, and annular groove is just few relatively.
Guide ring can play the guiding role and can play throttling action, thereby reduces the seal pressure differential of piston ring, prolongs the working life of piston ring, guarantees the operation of compressor long-term safety.
Claims (8)
1, a kind of piston sealing structure of vertical non-lubrication piston compressor, comprise the guide ring (5) and the piston ring (3) that are sleeved on the piston (4), it is characterized in that: the effect end at piston (4) is provided with guide ring (5), and is processed with maze trough on the outer ring of guide ring (5).
2, piston sealing structure of vertical non-lubrication piston compressor according to claim 1 is characterized in that: respectively be set with a guide ring (5) on the top and bottom circumferential surface of columniform piston (4).
3, piston sealing structure of vertical non-lubrication piston compressor according to claim 1 is characterized in that: the thickness of described guide ring (5) is greater than the thickness of conventional guide ring.
4, piston sealing structure of vertical non-lubrication piston compressor according to claim 1, it is characterized in that: between guide ring (5) and cylinder (2), be provided with and guarantee that guide ring had not only play the guiding role but also plays the thermal gap of throttling action, guarantee that promptly guide ring in working order down and cylinder maintenance less clearance.
5, piston sealing structure of vertical non-lubrication piston compressor according to claim 1 is characterized in that: described guide ring (5) and piston ring (3) are selected the filled polytetrafluoroethylene material for use.
6, piston sealing structure of vertical non-lubrication piston compressor according to claim 1 is characterized in that: described guide ring (5) is an overall thermal shell type guide ring.
7, piston sealing structure of vertical non-lubrication piston compressor according to claim 1 is characterized in that: maze trough is the groove of similar 60 ° of V thread screws.
8, piston sealing structure of vertical non-lubrication piston compressor according to claim 6 is characterized in that: according to the size of piston, the maze trough of processing on the outer ring of guide ring (5) is 3～10 grooves, and groove depth is got 1～1.5mm, and pitch of grooves is got 1～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820230990U CN201386647Y (en) | 2008-12-19 | 2008-12-19 | Piston sealing structure of vertical unlubricated piston compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820230990U CN201386647Y (en) | 2008-12-19 | 2008-12-19 | Piston sealing structure of vertical unlubricated piston compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201386647Y true CN201386647Y (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820230990U Expired - Fee Related CN201386647Y (en) | 2008-12-19 | 2008-12-19 | Piston sealing structure of vertical unlubricated piston compressor |
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| CN (1) | CN201386647Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487467A (en) * | 2008-12-19 | 2009-07-22 | 开封空分集团有限公司 | Piston sealing structure of vertical non-lubrication piston compressor |
| CN102235339A (en) * | 2010-04-30 | 2011-11-09 | 奔迪士商业运输系统公司 | Piston and cylinder assembly |
| CN102606473A (en) * | 2012-04-01 | 2012-07-25 | 三一重工股份有限公司 | Adaptive concrete piston and concrete conveying device |
-
2008
- 2008-12-19 CN CN200820230990U patent/CN201386647Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487467A (en) * | 2008-12-19 | 2009-07-22 | 开封空分集团有限公司 | Piston sealing structure of vertical non-lubrication piston compressor |
| CN102235339A (en) * | 2010-04-30 | 2011-11-09 | 奔迪士商业运输系统公司 | Piston and cylinder assembly |
| CN102235339B (en) * | 2010-04-30 | 2015-12-16 | 奔迪士商业运输系统公司 | Piston and cylinder component |
| CN102606473A (en) * | 2012-04-01 | 2012-07-25 | 三一重工股份有限公司 | Adaptive concrete piston and concrete conveying device |
| CN102606473B (en) * | 2012-04-01 | 2015-07-01 | 三一重工股份有限公司 | Adaptive concrete piston and concrete conveying device |
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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: 20100120 Termination date: 20141219 |
|
| EXPY | Termination of patent right or utility model |