CN204344408U - For the piston assembly of compressor - Google Patents
For the piston assembly of compressor Download PDFInfo
- Publication number
- CN204344408U CN204344408U CN201420721134.8U CN201420721134U CN204344408U CN 204344408 U CN204344408 U CN 204344408U CN 201420721134 U CN201420721134 U CN 201420721134U CN 204344408 U CN204344408 U CN 204344408U
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- piston
- piston ring
- ring
- cylinder sleeve
- opening
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Abstract
The utility model provides a kind of piston assembly for compressor relating to Compressor Technology field, comprising: cylinder sleeve; Piston only, piston only is arranged in cylinder sleeve, and the outer circumferential face of piston only is axially provided with at least two annular grooves successively; At least two piston rings, piston ring set is on corresponding annular groove, piston ring is provided with opening, the upper end of opening and the lower end of opening are through to the upper-end surface of piston ring and the lower end surface of piston ring, stagger in the position of the opening of at least two piston rings, the external diameter of piston ring and the internal diameter of cylinder sleeve are interference fit, and the external diameter of piston ring is greater than the external diameter of piston only; Piston rod, piston rod is inserted in piston only, and is connected with piston only.The utility model structure is simple, easy for installation, not easily causes damage and good airproof performance to cylinder sleeve after piston ring scuffing.
Description
Technical field
The utility model relates to Compressor Technology field, particularly relates to a kind of piston assembly for compressor.
Background technique
Existing compressor is being applied in Peng Si workshop section carbon dioxide recovery system, in accordance, gas in gas holder is delivered in process tank by compressor, reduce the gas pressure in gas holder, therefore, generally reflect the working efficiency of compressor with the pressure reduction values in gas holder in the unit time.
In existing compressor, the piston ring be arranged on piston only is associative ring, and this associative ring is made up of three arc ring plates; The material of associative ring is teflon.Due to three independently arc ring plate be placed on piston only, three independently arc ring plate need to provide tension force by preloading spring circle, piston ring is enable to be close to inboard wall of cylinder liner, play the effect in gap between packed-piston and cylinder body, so piston only also will arrange preloading spring circle, this structure is very complicated.
Piston only is in movement process, and piston ring, after wearing and tearing after a while, damages once appearance is broken, preloading spring circle can eject due to the tension force of self, produces and rubs, cause barrel wear with cylinder sleeve, gap between piston and cylinder body also will increase, and cause compressor operating efficiency to reduce.And the damage due to piston ring can cause the damage of piston and cylinder sleeve, and then decreases the working life of integral device.
In addition, change existing piston ring is installed time, need first piston rod is inserted in cylinder sleeve, hang piston, then by blocks of for arc ring plate along with in piston only press-in cylinder sleeve, due to working site narrow field, easily cause mounting point deflection.
Adopt existing structure, between the bimestrial spreadable life, the gas pressure tested every day in gas holder reduces numerical value, and in these two middle of the month, the gas pressure drop harmonic average in gas holder is about 19kpa/min.And the total price of piston ring is more than 7000 yuan in existing structure.
How to design a kind of structure simple, easy for installation, not easily damage is caused to cylinder sleeve after piston ring scuffing and the high piston assembly for compressor of efficiency is the problem that those skilled in the art need to solve.
Model utility content
The shortcoming of prior art in view of the above, it is simple, easy for installation that the technical problem that the utility model solves is to provide a kind of structure, not easily causes damage and the piston assembly for compressor of good airproof performance to cylinder sleeve after piston ring scuffing.
For achieving the above object and other relevant objects, the utility model provides a kind of piston assembly for compressor, comprising: cylinder sleeve; Piston only, described piston only is arranged in described cylinder sleeve, and the outer circumferential face of described piston only is axially provided with at least two annular grooves successively; At least two piston rings, described piston ring set is on corresponding described annular groove, described piston ring is provided with opening, the upper end of described opening and the lower end of described opening are through to the upper-end surface of described piston ring and the lower end surface of described piston ring, stagger in the position of the opening of at least two described piston rings, the external diameter of described piston ring and the internal diameter of described cylinder sleeve are interference fit, and the external diameter of described piston ring is greater than the external diameter of described piston only; Piston rod, described piston rod is inserted in described piston only, and is connected with described piston only.
Preferably, the material of described piston ring adopts cfrp.
Preferably, the angle between the medial axis of the outer port part of described opening and the lower end surface of described piston ring is 45 degree.
Preferably, the internal diameter of described piston ring and the external diameter of described annular groove are interference fit.
Preferably, described piston ring is formed in one.
Preferably, the position of the opening of at least two described piston rings is evenly arranged along the outer circumferential face of described piston only.
Preferably, the quantity of described annular groove is 5, and the quantity of described piston ring is 5.
As mentioned above, the piston assembly for compressor described in the utility model, has following beneficial effect:
Piston assembly of the present utility model eliminates preloading spring circle, piston ring of the present utility model is band domain structure jaggy, the utility model structure is simple, piston only is in movement process, piston ring is close to the inwall of cylinder sleeve by own tension, piston only is divided into two chambers, good airproof performance; Piston ring directly and cylinder sleeve produce and rub, piston ring scuffing amount can be compensated by the tension force of piston ring self, ensure that piston ring and cylinder sleeve fit tightly, make there is gap between piston only and cylinder sleeve, after avoiding piston only to contact with cylinder sleeve, cause cylinder sleeve to damage, the utility model improves the working efficiency of compressor.
Accompanying drawing explanation
Fig. 1 is shown as the external structure schematic diagram of the piston assembly for compressor of the present utility model.
Internal structure schematic diagram after the cylinder sleeve that Fig. 2 is shown as the piston assembly for compressor of the present utility model is broken away.
Fig. 3 is shown as the perspective view of the piston ring of the piston assembly for compressor of the present utility model.
Fig. 4 is shown as the side structure schematic diagram of the piston ring of the piston assembly for compressor of the present utility model.
Fig. 5 is shown as the structural representation of the piston only of the piston assembly for compressor of the present utility model.
Drawing reference numeral explanation
1 cylinder sleeve
2 piston onlies
3 annular grooves
4 piston rings
41 openings
42 outer port parts
43 lower end surfaces
The medial axis of the outer port part of L1 opening
5 piston rods
Embodiment
By particular specific embodiment, mode of execution of the present utility model is described below, person skilled in the art scholar the content disclosed by this specification can understand other advantages of the present utility model and effect easily.
Refer to accompanying drawing.Notice, structure, ratio, size etc. that this specification institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, still all should drop on technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
As shown in Figures 1 to 5, the piston assembly for compressor of the present utility model, comprising: cylinder sleeve 1; Piston only 2, piston only 2 is cylindrical, and piston only 2 is arranged in cylinder sleeve 1, and the outer circumferential face of piston only 2 is axially provided with at least two annular grooves 3 successively; At least two piston rings 4, piston ring 4 is enclosed within corresponding annular groove 3, piston ring 4 is provided with opening 41, the upper end of opening 41 and the lower end of opening 41 are through to the upper-end surface of piston ring 4 and the lower end surface 43 of piston ring 4, stagger in the position of the opening 41 of at least two piston rings 4, the external diameter of piston ring 4 and the internal diameter of cylinder sleeve 1 are interference fit, and the external diameter of piston ring 4 is greater than the external diameter of piston only 2; Piston rod 5, piston rod 5 is inserted in piston only 2, and is connected with piston only 2.
Piston assembly of the present utility model eliminates preloading spring circle, and the piston ring 4 for the piston assembly of compressor is band domain structure jaggy, and this structure is simple.Because the external diameter of piston ring 4 and the internal diameter of cylinder sleeve 1 are interference fit, and piston ring 4 is provided with opening 41, piston only 2 is in movement process, piston ring 4 is close to the inwall of cylinder sleeve 1 by own tension, piston ring 4 directly and cylinder sleeve 1 produce and rub, piston ring 4 wear extent can be compensated by the tension force of piston ring 4 self, this structure makes guarantee piston ring 4 and cylinder sleeve 1 fit tightly, make there is gap between piston only 2 and cylinder sleeve 1, after avoiding piston only 2 to contact with cylinder sleeve 1, cause cylinder sleeve 1 to damage, improve the working efficiency of compressor.The quantity of piston ring 4 is at least two, piston ring 4 is provided with opening 41, staggers in the position of the opening 41 of at least two piston rings 4, and this structure makes the inside of cylinder sleeve 1 be divided into two chambers by least two piston rings 4, and two chambers are not communicated with, adopt at least two piston ring 4 good airproof performances.The quantity of piston ring 4 is at least two, in compressor operating process, even if broken crack conditions appears in a slice piston ring 4, also can not cause damage to cylinder sleeve 1, and then improves the working life of integral device.In addition, when changing ring installation 4, as long as be first installed on piston only 2 by piston ring 4, then load in cylinder sleeve 1 together with piston only 2, piston rod 5, mounting type positioning precision of the present utility model is high, convenient and swift.
The material of piston ring 4 adopts cfrp.Cfrp has excellent chemistry and physical property, adopt cfrp to make piston ring 4, make piston ring 4 have good compared with long working life, elasticity, there is excellent self-lubricating property, the feature such as friction factor is little, thermal distortion is little, thermal diffusivity is good.Owing to adopting piston ring 4 friction factor of cfrp little, the abrasion condition therefore between cylinder sleeve 1 and piston ring 4 reduces greatly.
Angle between the medial axis L1 of the outer port part 42 of opening 41 and the lower end surface 43 of piston ring 4 is 45 degree.This structure can increase the tension force of piston ring 4.
The internal diameter of piston ring 4 and the external diameter of annular groove 3 are interference fit.This structure makes piston ring 4 can stably be set on annular groove 3.
Piston ring 4 is formed in one.The domain structure that piston ring 4 is formed in one, this structure is convenient to processing, and can provide larger tension force.
The position of the opening 41 of at least two piston rings 4 is evenly arranged along the outer circumferential face of piston only 2.This structure makes the projection of the opening 41 of at least two piston rings 4 in the plane at the end face place of piston only 2, profile along the end face of piston only 2 is evenly arranged, ensure that the formation sealing configuration between at least two piston rings 4 and cylinder sleeve 1, be two chambers by the interior separation of cylinder sleeve 1, and the distribution of strain that at least two piston rings 4 are provided evenly.
In the present embodiment, the quantity of annular groove 3 is 5, and the quantity of piston ring 4 is 5.The external diameter 120mm of piston ring 4, internal diameter 100mm, height 10mm, opening 41 width 5mm.
Adopt structure of the present utility model, the piston assembly being used for compressor is applied to Peng Si workshop section carbon dioxide recovery system, in accordance, in between the bimestrial spreadable life, the gas pressure tested every day in gas holder reduces numerical value, these two middle of the month, the gas pressure drop harmonic average of gas holder is about 21kap/ minute, compares existing structure, and working efficiency promotes about 10%.5 piston rings 4 of the present utility model are a set of, total price only about 1000 yuan, and 5 piston rings 4 just can take spare part within one month, and existing piston ring 4 is taken spare part and needed six months at least.
The utility model structure is simple, easy for installation, and piston ring 4 not easily causes damage to cylinder sleeve 1 after wearing and tearing and efficiency is high.
To sum up, the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (7)
1. for a piston assembly for compressor, it is characterized in that, comprising:
Cylinder sleeve (1);
Piston only (2), described piston only (2) is arranged in described cylinder sleeve (1), and the outer circumferential face of described piston only (2) is axially provided with at least two annular grooves (3) successively;
At least two piston rings (4), described piston ring (4) is enclosed within corresponding described annular groove (3), described piston ring (4) is provided with opening (41), the upper end of described opening (41) and described opening (41) lower end are through to the upper-end surface of described piston ring (4) and the lower end surface (43) of described piston ring (4), stagger in the position of the opening (41) of at least two described piston rings (4), the external diameter of described piston ring (4) and the internal diameter of described cylinder sleeve (1) are interference fit, the external diameter of described piston ring (4) is greater than the external diameter of described piston only (2),
Piston rod (5), described piston rod (5) is inserted in described piston only (2), and is connected with described piston only (2).
2. the piston assembly for compressor according to claim 1, is characterized in that: the material of described piston ring (4) adopts cfrp.
3. the piston assembly for compressor according to claim 1, is characterized in that: the angle between the medial axis of the outer port part (42) of described opening (41) and the lower end surface (43) of described piston ring (4) is 45 degree.
4. the piston assembly for compressor according to claim 1, is characterized in that: the internal diameter of described piston ring (4) and the external diameter of described annular groove (3) are interference fit.
5. the piston assembly for compressor according to claim 1, is characterized in that: described piston ring (4) is formed in one.
6. the piston assembly for compressor according to claim 1, is characterized in that: the position of the opening (41) of at least two described piston rings (4) is evenly arranged along the outer circumferential face of described piston only (2).
7. the piston assembly for compressor according to claim 1, is characterized in that: the quantity of described annular groove (3) is 5, and the quantity of described piston ring (4) is 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721134.8U CN204344408U (en) | 2014-11-25 | 2014-11-25 | For the piston assembly of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721134.8U CN204344408U (en) | 2014-11-25 | 2014-11-25 | For the piston assembly of compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204344408U true CN204344408U (en) | 2015-05-20 |
Family
ID=53227681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420721134.8U Active CN204344408U (en) | 2014-11-25 | 2014-11-25 | For the piston assembly of compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204344408U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488764A (en) * | 2018-12-25 | 2019-03-19 | 四川大川压缩机有限责任公司 | A kind of piston ring suitable for High Pressure Difference |
-
2014
- 2014-11-25 CN CN201420721134.8U patent/CN204344408U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488764A (en) * | 2018-12-25 | 2019-03-19 | 四川大川压缩机有限责任公司 | A kind of piston ring suitable for High Pressure Difference |
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