CN207777115U - A kind of step piston for balanced opposed compressor - Google Patents
A kind of step piston for balanced opposed compressor Download PDFInfo
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- CN207777115U CN207777115U CN201721901777.0U CN201721901777U CN207777115U CN 207777115 U CN207777115 U CN 207777115U CN 201721901777 U CN201721901777 U CN 201721901777U CN 207777115 U CN207777115 U CN 207777115U
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- piston
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- pressure piston
- rod
- piston rod
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Abstract
The utility model is related to a kind of step pistons for balanced opposed compressor, including the piston rod that ladder is rod-shaped（1）, in piston rod（1）The side being relatively large in diameter is equipped with high pressure piston（2）, the smaller side of diameter be equipped with screw rod（3）, in screw rod（3）Upper mating connection nut（4）, piston rod（1）And high pressure piston（2）It is structure as a whole, in piston rod（1）Intermediate be socketed low-pressure piston（7）, piston rod（1）And low-pressure piston（7）Interference fit.The advantages of the utility model：Present apparatus high pressure piston is structure as a whole with piston rod, and low-pressure piston and piston rod socket interference fit, structure is simplified compared with prior art, it is easy for installation, high pressure piston and low-pressure piston are not necessarily to piston unt and lock, and effectively improve the reliability of compressor operating, service life is long.
Description
Technical field
It is the utility model is related to piston compressor technical field, more particularly to a kind of for balanced opposed compressor
Step piston.
Background technology
In reciprocating compressor, the differential piston element of high pressure is important moving component, in conventional step piston group
In part, it is often designed with hiigh pressure stage piston, low-pressure stage piston, piston unt, piston rod, the components such as cross nut；Piston it
Between use bolted on connection, not only precision is difficult to ensure this mode, and piston element in reciprocating motion by gas force and
The influence of inertia force, bolt is easy to loosen, and since positioning accuracy is not high, be easy to cause hiigh pressure stage piston ring eccentric wear.
Utility model content
Purpose of the utility model is to solve technical problem present in background technology, and the one kind proposed for pair
Claim the step piston of balanced type compressor.
To achieve the goals above, the utility model uses following technical solution：
A kind of step piston for balanced opposed compressor, it is characterised in that：Including piston rod, piston rod is ladder
Bar is equipped with the smaller side of high pressure piston, diameter in the larger side of diameter of piston rod and is equipped with screw rod, is connected on screw rod
Nut, piston rod and high pressure piston are structure as a whole, and ecto-entad is socketed height successively on the piston rod of close high pressure piston side
Guide ring and one group of high-pressure piston-ring are pressed, intermediate in piston rod is socketed low-pressure piston, piston rod and low-pressure piston interference fit,
It is socketed low pressure guide ring on low-pressure piston and one group of low-pressure piston ring, low-pressure piston are positioned close to the side of high pressure piston.
Based on the above technical solution, there can be technical solution further below：
Ladder hole is equipped at the axis of the low-pressure piston, ladder hole is socketed on the piston rod.
The nut is cross nut, the locking screw holes equipped with lateral direction penetrating and longitudinally disposed longitudinal spiral shell on nut
Hole, be connected lock-screw in locking screw holes.
The utility model has the advantage of：Present apparatus high pressure piston is structure as a whole with piston rod, low-pressure piston and piston
Rod set connects interference fit, and structure is simplified compared with prior art, easy for installation, and high pressure piston and low-pressure piston are not necessarily to
Piston unt locks, and effectively improves the reliability of compressor operating, when for high-speed piston formula compressor, moving component and close
Sealing long lifespan extends the maintenance period.
Description of the drawings
Fig. 1 is the basic structure schematic diagram of the utility model.
Specific implementation mode
In order to make the utility model be more clearly understood, the present apparatus is described in detail below in conjunction with attached drawing, it is described herein
Specific embodiment be only used to explain the utility model, be not used to limit the utility model.
As shown in Figure 1, a kind of step piston for balanced opposed compressor provided by the utility model, including piston
Bar 1, piston rod 1 are stepped stem, and the high pressure piston 2 that material is steel alloy, piston rod are equipped in the side that piston rod 1 is relatively large in diameter
1 and high pressure piston 2 be structure as a whole, the smaller side of 1 diameter of piston rod be equipped with screw rod 3, be connected nut on screw rod 3
4, nut 4 is cross nut, the locking screw holes 11 equipped with lateral direction penetrating and longitudinally disposed longitudinal screw hole 12 on nut 4,
The mating connection lock-screw 13 in locking screw holes 11.
Ecto-entad is socketed high pressure guide ring 5 and seven high pressure pistons successively on 2 side piston rod 1 of close high pressure piston
Ring 6, intermediate in piston rod 1 are socketed the low-pressure piston 7 that a material is cast aluminium, lead to equipped with ladder at the axis of low-pressure piston 7
Hole 10, ladder hole 10 are socketed on piston rod 1, and piston rod 1 and low-pressure piston 7 are interference fitted, and are socketed on low-pressure piston 7
Low pressure guide ring 8 and four low-pressure piston rings 9, low-pressure piston 7 are positioned close to the side of high pressure piston 2.
When mounted, low-pressure piston 7 is heated to 80 DEG C in an oven, then penetrates piston rod 1 in ladder hole 10,
When assembly, by the bottom surface of high pressure piston 2 and the upper plane positioning of low-pressure piston 7, to be cooled, low-pressure piston 7 after assembly in place
It realizes and is interference fitted with piston rod 1.
Claims (3)
1. a kind of step piston for balanced opposed compressor, it is characterised in that：Including piston rod（1）, piston rod（1）For
Stepped stem, in piston rod（1）The side being relatively large in diameter is equipped with high pressure piston（2）, the smaller side of diameter be equipped with screw rod（3）,
Screw rod（3）Upper mating connection nut（4）, piston rod（1）And high pressure piston（2）It is structure as a whole, close to high pressure piston（2）One
Side piston bar（1）Upper ecto-entad is socketed high pressure guide ring successively（5）With one group of high-pressure piston-ring（6）, in piston rod（1）In
Between be socketed low-pressure piston（7）, piston rod（1）And low-pressure piston（7）Interference fit, in low-pressure piston（7）Upper socket low pressure is oriented to
Ring（8）With one group of low-pressure piston ring（9）, low-pressure piston（7）It is positioned close to high pressure piston（2）Side.
2. a kind of step piston for balanced opposed compressor according to claim 1, it is characterised in that：It is described low
Press piston（7）Axis at be equipped with ladder hole（10）, ladder hole（10）It is socketed in the piston rod（1）On.
3. a kind of step piston for balanced opposed compressor according to claim 1, it is characterised in that：The spiral shell
It is female（4）For cross nut, in nut（4）It is equipped with the locking screw holes of lateral direction penetrating（11）With longitudinally disposed longitudinal screw hole
（12）, in locking screw holes（11）Interior mating connection lock-screw（13）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901777.0U CN207777115U (en) | 2017-12-29 | 2017-12-29 | A kind of step piston for balanced opposed compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901777.0U CN207777115U (en) | 2017-12-29 | 2017-12-29 | A kind of step piston for balanced opposed compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207777115U true CN207777115U (en) | 2018-08-28 |
Family
ID=63225631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721901777.0U Active CN207777115U (en) | 2017-12-29 | 2017-12-29 | A kind of step piston for balanced opposed compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207777115U (en) |
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2017
- 2017-12-29 CN CN201721901777.0U patent/CN207777115U/en active Active
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