CN203067219U - Self-locking type anti-looseness structure for connecting piston rod and crosshead body of compressor - Google Patents
Self-locking type anti-looseness structure for connecting piston rod and crosshead body of compressor Download PDFInfo
- Publication number
- CN203067219U CN203067219U CN 201320028439 CN201320028439U CN203067219U CN 203067219 U CN203067219 U CN 203067219U CN 201320028439 CN201320028439 CN 201320028439 CN 201320028439 U CN201320028439 U CN 201320028439U CN 203067219 U CN203067219 U CN 203067219U
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- piston rod
- conical surface
- crosshead body
- compressor
- self
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Abstract
A self-locking type anti-looseness structure for connecting a piston rod and a crosshead body of a compressor comprises the piston rod; one end of the piston rod is in threaded connection with the crosshead body; and a lock nut is in threaded connection with the piston rod, and is matched with the crosshead body through tight pressing. The anti-loose structure is characterized in that an inner circular conical surface is arranged at the front end of the crosshead body; an outer circular conical surface matched with the inner circular conical surface is arranged at the rear end of the lock nut, and the inner circular conical surface and the outer circular conical surface are tightly pressed together mutually. The cone angle of the inner/outer circular conical surface is within 20-35 degrees. The anti-looseness structure is simple, and can avoid the problem of failures caused by loose connection between the piston rod and the crosshead caused by additional external force resulting from great vibration, impact load and temperature difference, and thermal expansion and the like when the compressor is in operation, thereby improving the connection reliability effectively, and improving the operation reliability of the compressor to the utmost extent.
Description
Technical field
The utility model relates to a kind of be used to the self-locking structure that is threaded, be particularly related to a kind of self-locking structure that is applicable to that compressor piston rod is connected with crosshead body, this novel self-locking anti-loose structure is simple, can improve the reliability of compressor operation to greatest extent.
Background technique
In modern industry, the compressor of various media, various types obtains using more and more widely, particularly the application scope of piston gas compressor is particularly outstanding, present industrial occupying an important position, is widely used in fields such as military affairs, industry and communications and transportation.
Under the prior art condition, piston rod is threaded with the crosshead Connecting format, connector is connected, flange connects with wedge is connected etc. four kinds, wherein, have simple in structure, easily manufactured, in light weight, low cost and other advantages because being threaded and use the most commonly usedly, especially in middle-size and small-size compressor, be most widely used.
In traditional compressor design, generally all piston rod and crosshead connecting end are designed to screw thread, both connect by the piston end nut and tighten together, can be conveniently when assembling or overhaul the adjustment of the clearance volume of laggard capable cylinder and piston.Fig. 1 is present several screw connection structure patterns of usefulness usually, double nut mostly commonly used and tight after carry out locking.Double nut and tight locking this mode are to produce a positive pressure that does not change with external force between screw pair, can stop screw pair frictional force in relative rotation to produce one.This positive pressure can be by two realizing to the collet threaded pair axially or simultaneously, as adopting elastic washer, double nut, self-locking nut and nylon inserts locking nut etc.This locking mode is more convenient for the dismounting of nut, though it is simple in structure, be widely used, but under the situation of impact, vibration and varying load, bolt can descend because of the lax pretightening force that causes at the beginning, increase along with vibration number, the pretightening force of loss increases lentamente, finally will cause nut to get loose, and inefficacy is threaded.Particularly be applied in the piston rod that vibration is big, impact load is big and be connected the locking inefficacy of appearance easily with crosshead, and then make piston rod loosening, may cause piston to hit cylinder, even may lead to device damage and casualties because seriously hitting cylinder, therefore, it is particularly important to be connected the locking reliability that is designed to be threaded with crosshead at piston rod.
Summary of the invention
The self-locking structure that the utility model provides a kind of compressor piston rod to be connected with crosshead body, purpose is to solve the prior art problem, a kind of self-locking structure that is connected with crosshead for the piston rod of compressor is provided, this novel self-locking anti-loose structure is simple, can improve the reliability of compressor operation to greatest extent.
The utility model technological scheme that adopts of dealing with problems is:
The self-locking structure that compressor piston rod is connected with crosshead body comprises a piston rod, and piston rod one end and crosshead body are threaded togather, and the locking nut screw thread is located on the piston rod, and locking nut and crosshead body press and be combined together.Described crosshead body front end has internal conical surface, and the locking nut rear end has the outer conical surface that matches with this internal conical surface, and inside and outside conical surface presses mutually and is combined together.
The cone angle of inside/outside conical surface is in 20 °～35 ° scopes.
Described piston rod and crosshead body link together by fine thread.
The beneficial effects of the utility model: 1. traditional piston rod and screw connection structure between the crosshead body are formed the locking conical surface that changes into of self-locking by original plane contact and contact the self-locking anti-loose structure, having changed locking nut only is subjected to single axial power for both having born axial thrust load, bear the radial component in the oriented center of circle again, more effectively utilized conical self-locking performance better.The connecting thread part itself has certain locking self-locking performance, the self-locking of cone-shaped section in addition, and it is locking just to have formed twice.
2. the male cone (strobilus masculinus) by the piston rod locking nut contacts with the inner conical surface of crosshead body, has better realized the location, has guaranteed neutrality, and beating when having reduced piston rod movement strengthened the rigidity that connects fastening part, reduced vibration effectively.
3. when the utility model can effectively be avoided compressor operation, the additional external force that, impact load big owing to vibration, temperature difference heat expansion etc. cause made piston rod be connected with crosshead to become flexible and Problem of Failure.Thereby, effectively improved the reliability that connects, and then can effectively improve the reliability of compressor operation.
4. the locking design of secondary, can effectively improve the reliability of compressor operation, exist under the situation of vibration and impulsive load even guaranteed, being connected yet between piston rod and the crosshead body can not become flexible, effectively improved the reliability that connects, and then improve the reliability of compressor operation, prolonged the working life of compressor.
5. the utility model is simple in structure, and compressor anti-loose structure of the prior art relatively is more scientific and reasonable, and practicability is stronger, and is remarkably productive, is suitable for applying.
Description of drawings
Fig. 1 is the prior art constructions schematic representation;
Fig. 2 is the utility model structural representation;
Fig. 3 is the structural representation of locking nut;
Fig. 4 is the sectional drawing of crosshead body.
Among the figure: 1. piston rod, 2. locking nut, 3. crosshead body, 4. internal conical surface, 5. outer conical surface.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
The self-locking structure that compressor piston rod as shown in Fig. 2 to Fig. 4 is connected with crosshead body, comprise a piston rod 1, piston rod 1 one ends and crosshead body 3 are threaded togather, and locking nut 2 is threaded on the piston rod 1, and locking nut 2 presses with crosshead body 3 and is combined together.Described crosshead body 3 front ends have internal conical surface 4, and the locking nut rear end has the outer conical surface 5 that matches with this internal conical surface, and internal conical surface 4 and outer conical surface 5 are pressed mutually and be combined together.
During use, piston rod 1 and crosshead body 3 are formed one and are had the pair that is threaded that function is loosened in self-locking by being threaded togather, and for strengthening self-locking locking functions between the two, piston rod 1 is connected with the fine thread that passes through of crosshead body 3 in the present embodiment.When being screwed into correct position, locking nut 2 is screwed into the lane place suitable with crosshead body again, tighten by spanner again, the outer conical surface 5 of locking nut is fully fitted with the internal conical surface 4 of crosshead body, form the self-locking auxiliary connection, reach accurate location purpose, reach and utilize fine thread and itself anti-loosing effect and the conical surface locking self-locking effect in the second level of fitting when tight.When needs are dismantled, at first, unscrew the cone locking nut as unscrewing common lock jack panel 2, then just can the easy removal piston rod with crosshead body between be threaded.
Because inside and outside conical surface matches, therefore the cone angle angle of inside and outside conical surface is identical, and for strengthening its self-locking effect, the angle Selection of cone angle ∠ A is in 20 °～35 ° scopes in the present embodiment.And be to make to have good applying degree and tightness between internal conical surface 4 and the outer conical surface 5, strengthen and to loosen the self-locking effect, after internal conical surface 4 and outer conical surface 5 are ground, make it have very little roughness.Simultaneously for strengthening the intensity of locking nut 2 and crosshead body 3, all adopt intensity hardness all preferably material make.
When the utility model can effectively be avoided compressor operation, the additional external force that, impact load big owing to vibration, temperature difference heat expansion etc. cause made piston rod be connected with crosshead to become flexible and Problem of Failure.Thereby, effectively improved the reliability that connects, and then can effectively improve the reliability of compressor operation.
Claims (3)
1. the self-locking structure that is connected with crosshead body of compressor piston rod, comprise a piston rod, piston rod one end is arranged in crosshead body, locking nut is arranged on the piston rod, and locking nut and crosshead body press and are combined together, it is characterized in that: described crosshead body front end has internal conical surface, and the locking nut rear end has the outer conical surface that matches with this internal conical surface, and inside and outside conical surface presses mutually and is combined together.
2. the self-locking structure that is connected with crosshead body of the compressor piston rod described in claim 1, it is characterized in that: the cone angle of inside/outside conical surface is in 20 °～35 ° scopes.
3. the self-locking structure that is connected with crosshead body of the compressor piston rod described in claim 1, it is characterized in that: described piston rod and crosshead body link together by fine thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028439 CN203067219U (en) | 2013-01-18 | 2013-01-18 | Self-locking type anti-looseness structure for connecting piston rod and crosshead body of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028439 CN203067219U (en) | 2013-01-18 | 2013-01-18 | Self-locking type anti-looseness structure for connecting piston rod and crosshead body of compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067219U true CN203067219U (en) | 2013-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320028439 Expired - Fee Related CN203067219U (en) | 2013-01-18 | 2013-01-18 | Self-locking type anti-looseness structure for connecting piston rod and crosshead body of compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203067219U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050859A (en) * | 2016-08-18 | 2016-10-26 | 开封空分集团有限公司 | Novel anti-looseness structure for large-diameter piston rod |
| CN106089686A (en) * | 2016-07-18 | 2016-11-09 | 衡阳中地装备探矿工程机械有限公司 | A kind of crosshead and piston rod attachment structure and processing method thereof |
| CN106321405A (en) * | 2016-08-31 | 2017-01-11 | 许伟 | Device for preventing looseness of cap for cross head and piston rod of compressor |
-
2013
- 2013-01-18 CN CN 201320028439 patent/CN203067219U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089686A (en) * | 2016-07-18 | 2016-11-09 | 衡阳中地装备探矿工程机械有限公司 | A kind of crosshead and piston rod attachment structure and processing method thereof |
| CN106050859A (en) * | 2016-08-18 | 2016-10-26 | 开封空分集团有限公司 | Novel anti-looseness structure for large-diameter piston rod |
| CN106321405A (en) * | 2016-08-31 | 2017-01-11 | 许伟 | Device for preventing looseness of cap for cross head and piston rod of compressor |
| CN106321405B (en) * | 2016-08-31 | 2018-08-24 | 许伟 | A kind of compressor crosshead piston rod and cap anti-loosing 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20220118 |