CN206397691U - A kind of piston rod seal of double-operation diaphragm compressor - Google Patents
A kind of piston rod seal of double-operation diaphragm compressor Download PDFInfo
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- CN206397691U CN206397691U CN201720014181.2U CN201720014181U CN206397691U CN 206397691 U CN206397691 U CN 206397691U CN 201720014181 U CN201720014181 U CN 201720014181U CN 206397691 U CN206397691 U CN 206397691U
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- piston rod
- piston portion
- rod seal
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Abstract
A kind of piston rod seal of double-operation diaphragm compressor of disclosure, it does not allow two, three-level lubricating cylinders oil is interior to leak, the leakage rate of lubricating oil is controlled in bottom line, cool down cylinder sleeve, piston is kept in the cylinder, to prevent piston from directly contacting with cylinder wall, it is ensured that piston smooth movement, frictional resistance is reduced, piston knock is prevented.The piston rod (4) of double-operation diaphragm compressor includes：Big piston portion (5) and valve piston portion (6), the cross-sectional diameter of big piston portion is more than the cross-sectional diameter in valve piston portion, the oil pocket of the oil pocket of secondary cylinder body (1) and three-level cylinder body (3) is separated by big piston portion, valve piston portion connects the casing (11) of compressor, and the piston rod seal of the double-operation diaphragm compressor includes first piston ring (7), the first support ring (8)；First piston ring, the first support ring are enclosed on big piston portion, and the first support ring is close to secondary cylinder body.
Description
Technical field
The utility model belongs to the technical field of diaphragm type compressor, more particularly to a kind of piston of double-operation diaphragm compressor
Rod seal apparatus.
Background technology
With the development in industrial gasses market, the requirement of the polytropy of operating mode to diaphragm type compressor is more and more stricter.High pressure
Power, the state of arts of high pressure ratio is more and more.The timing of intake air temperature one, under the operating mode of high pressure ratio, will cause delivery temperature etc.
Parameter is raised, and the service life of body and valve to compressor has a great impact.To avoid such a phenomenon from occurring, at this stage all
It is the form using two machine series connection, multi-stage compression, to reduce pressure ratio, raising efficiency.But such a operating mode needs two machines
Compression, undoubtedly adds cost.To solve this problem, the multi-stage compression of diaphragm type compressor is realized, double-operation diaphragm is employed
Pressure texture, increases compressor series.
As shown in figure 1, the principle of this double acting pressure texture is：Completed using the difference in areas of big valve piston on piston rod
Work.Its difference in areas should be met in theory, П * D2 1/4-П*D2 2/ 4=П * D2 3/ 4 (wherein D1For big piston on piston rod
Diameter；D2For valve piston diameter on piston rod；D3For the cylinder diameter of three-level cylinder).The oil pocket of secondary cylinder body 1 and the oil pocket of three-level cylinder body 3
Separated by big piston portion on piston rod 4.Label 2 is threeway.When piston rod is run to cylinder body direction, piston rod promotes profit
Lubricating oil makes secondary cylinder body component work.When piston rod is run to crankshaft direction, on piston rod two at piston work simultaneously, greatly
Piston prevents to leak in the lubricating oil in three-level cylinder body to the oil pocket of secondary cylinder body, and valve piston prevents lubricating oil in three-level part of cylinder block
It is interior to leak to box part.Note：The position of big valve piston on piston rod.By taking GDS-22/180 as an example, piston stroke is 130mm.
When piston rod runs to the limit to cylinder body direction, piston rod upper end can not with oil distribution casing toe contact, while support ring can not
Beyond slideway.Edge of the top of valve piston no more than three-level cylinder body.When piston rod runs to the limit to crankshaft direction,
The support ring of piston rod valve piston must not exceed slideway.The inner edge no more than three-level cylinder body of big piston.
But, the double acting pressure texture of the above, which operationally easily causes leakage in two, three-level lubricating cylinders oil, causes profit
The not enough situation of lubricating oil pressure, so that cause sealing effectiveness poor, cylinder sleeve overheat；Piston is caused directly to be connect with cylinder wall when serious
Touch, or even piston knock.
The content of the invention
The technical problems to be solved in the utility model is that the defect for overcoming prior art is compressed there is provided a kind of double-operation diaphragm
The piston rod seal of machine, it does not allow two, three-level lubricating cylinders oil is interior to leak, and the leakage rate of lubricating oil is controlled in minimum
Degree, cools down cylinder sleeve, and piston is kept in the cylinder, to prevent piston from directly contacting with cylinder wall, it is ensured that piston smooth movement, reduced
Frictional resistance, prevents piston knock.
The technical scheme solved the above problems is：The piston rod seal of this double-operation diaphragm compressor, double acting
The piston rod (4) of diaphragm type compressor includes：Big piston portion (5) and valve piston portion (6), the cross-sectional diameter of big piston portion is more than small
The cross-sectional diameter of piston portion, the oil pocket of the oil pocket and three-level cylinder body (3) of secondary cylinder body (1) is separated by big piston portion, small work
Piston part connects the casing (11) of compressor, the piston rod seal of the double-operation diaphragm compressor include first piston ring (7),
First support ring (8)；First piston ring, the first support ring are enclosed on big piston portion, and the first support ring is close to secondary cylinder body.
The utility model plays a part of support by the first support ring, prevents direct friction between metal；Pass through first
Piston ring does not allow two, three-level lubricating cylinders oil is interior to leak, and the leakage rate of lubricating oil is controlled, in bottom line, cylinder sleeve to be cooled down, by work
Plug keeps in the cylinder, preventing piston from directly contacting with cylinder wall, it is ensured that piston smooth movement, reduces frictional resistance, prevents from living
Fill in engine knock.
Brief description of the drawings
Fig. 1 is the double-operation diaphragm with the piston rod seal according to double-operation diaphragm compressor of the present utility model
The structural representation of compressor.
Fig. 2 is the structural representation of the piston rod seal according to double-operation diaphragm compressor of the present utility model.
Embodiment
As shown in Figure 1-2, the piston rod seal of this double-operation diaphragm compressor, the work of double-operation diaphragm compressor
Stopper rod 4 includes：Big piston portion 5 and valve piston portion 6, the cross-sectional diameter of big piston portion are more than the cross-sectional diameter in valve piston portion,
The oil pocket of the oil pocket of secondary cylinder body 1 and three-level cylinder body 3 is separated by big piston portion, and valve piston portion connects the casing 11 of compressor,
The piston rod seal of the double-operation diaphragm compressor includes first piston ring 7, the first support ring 8；First piston ring, first
Support ring is enclosed on big piston portion, and the first support ring is close to secondary cylinder body.
The utility model plays a part of support by the first support ring, prevents direct friction between metal；Pass through first
Piston ring does not allow two, three-level lubricating cylinders oil is interior to leak, and the leakage rate of lubricating oil is controlled, in bottom line, cylinder sleeve to be cooled down, by work
Plug keeps in the cylinder, preventing piston from directly contacting with cylinder wall, it is ensured that piston smooth movement, reduces frictional resistance, prevents from living
Fill in engine knock.
In addition, as shown in Fig. 2 the length of the first piston ring is more than the half length of big piston portion.So sealing is imitated
Fruit and cooling effect are all more preferable.
In addition, the piston rod seal of the double-operation diaphragm compressor also includes second piston ring 9；Second piston ring set
In valve piston portion.It can so prevent to leak to casing in lubricating oil in three-level cylinder body.
In addition, the piston rod seal of the double-operation diaphragm compressor also includes the second support ring 10；Second support ring
It is enclosed in valve piston portion and close to the casing of compressor.Piston so can be preferably supported, direct friction between metal is prevented.
In addition, the length of the second piston ring is more than the half length in valve piston portion.So sealing effectiveness and cooling is imitated
Fruit is all more preferable.
It is described above, only it is preferred embodiment of the present utility model, not makees any formal limit to the utility model
System.It will be apparent to an ordinarily skilled person in the art that every made according to technical spirit of the present utility model to above example
Any simple modification, equivalent variations and modification, still belong to the protection domain of technical solutions of the utility model.
Claims (5)
1. a kind of piston rod seal of double-operation diaphragm compressor, the piston rod (4) of double-operation diaphragm compressor includes：Greatly
Piston portion (5) and valve piston portion (6), the cross-sectional diameter of big piston portion are more than the cross-sectional diameter in valve piston portion, secondary cylinder body
(1) oil pocket of oil pocket and three-level cylinder body (3) is separated by big piston portion, and valve piston portion connects the casing (11) of compressor, its
It is characterised by：The piston rod seal of the double-operation diaphragm compressor includes first piston ring (7), the first support ring (8)；The
One piston ring, the first support ring are enclosed on big piston portion, and the first support ring is close to secondary cylinder body.
2. the piston rod seal of double-operation diaphragm compressor according to claim 1, it is characterised in that：Described first
The length of piston ring is more than the half length of big piston portion.
3. the piston rod seal of double-operation diaphragm compressor according to claim 1 or 2, it is characterised in that：This pair
Acting on the piston rod seal of diaphragm type compressor also includes second piston ring (9)；Second piston ring set is in valve piston portion.
4. the piston rod seal of double-operation diaphragm compressor according to claim 3, it is characterised in that：The double acting
The piston rod seal of diaphragm type compressor also includes the second support ring (10)；Second support ring is enclosed in valve piston portion and close
The casing of compressor.
5. the piston rod seal of double-operation diaphragm compressor according to claim 4, it is characterised in that：Described second
The length of piston ring is more than the half length in valve piston portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720014181.2U CN206397691U (en) | 2017-01-06 | 2017-01-06 | A kind of piston rod seal of double-operation diaphragm compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720014181.2U CN206397691U (en) | 2017-01-06 | 2017-01-06 | A kind of piston rod seal of double-operation diaphragm compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206397691U true CN206397691U (en) | 2017-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720014181.2U Active CN206397691U (en) | 2017-01-06 | 2017-01-06 | A kind of piston rod seal of double-operation diaphragm compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118008766A (en) * | 2024-04-08 | 2024-05-10 | 江苏恒久机械股份有限公司 | Double-acting piston rod assembly and diaphragm compressor |
-
2017
- 2017-01-06 CN CN201720014181.2U patent/CN206397691U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118008766A (en) * | 2024-04-08 | 2024-05-10 | 江苏恒久机械股份有限公司 | Double-acting piston rod assembly and diaphragm compressor |
| CN118008766B (en) * | 2024-04-08 | 2024-06-04 | 江苏恒久机械股份有限公司 | Double-acting piston rod assembly and diaphragm compressor |
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