CN204553158U - A kind of differential combined piston - Google Patents
A kind of differential combined piston Download PDFInfo
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- CN204553158U CN204553158U CN201420861929.9U CN201420861929U CN204553158U CN 204553158 U CN204553158 U CN 204553158U CN 201420861929 U CN201420861929 U CN 201420861929U CN 204553158 U CN204553158 U CN 204553158U
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- stage piston
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- high pressure
- piston
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Abstract
The utility model relates to a kind of differential combined piston, it is characterized in that piston rod (7) is connected with high pressure stage piston body (1) end thread hole through the screw rod (2) of low pressure stage piston body (6), piston rod end, high pressure stage piston body (1) and low pressure stage piston body (6) are connected as a single entity.High pressure stage piston body is connected with gland (4) to coordinate with low pressure stage piston (6) end face; High pressure stage piston body (1) connects lock washer (3), and lock washer (3) edge is provided with a flange (3a), and coordinate with the flange preformed hole (4a) on gland (4) and locate, the flange (3b) of lock washer (3) is formed with reserved platform and coordinates.The utility model compared with prior art has following shortcoming: mechanical locking device reliability is high, and processing and assembling is easy to assembly, easy to operate.Although piston total height does not become, compared with conventional ASSEMBLE piston structure, piston in combination join strength strengthens greatly, has stopped bolt connection and has easily caused fatigue fracture phenomenon.
Description
technical field:
The utility model relates to gas compressing equipment, the piston particularly in air compressor.
background technique:
In order to make full use of compressor foundation part tonnage, some compresser cylinder makes stage differential style cylinder, and namely compressor one arranges layout two cylinders or more, to reach the effect compressing more high pressure medium.This just causes a kind of true, and differential piston length increases, and in order to cost-saving, each Compressor Manufacturing enterprise often adopts traditional Combined piston structure (Fig. 5).This structure is formed primarily of high pressure stage piston, low pressure stage piston, gland and piston rod, and the faying surface wherein between combined piston requires that machining accuracy is high, requires also high during assembling, and gap control is very tight, virtually increases cost again.If when compressor operates for a long time, the long-term to-and-fro motion of piston, makes bolt on gland repeatedly stressed, the most always causes the fatigue fracture of bolt under alternate load, and high pressure stage piston flies out the accident of taking blame for others.If compressor is not long-term running, but containing certain impurity particle in compressed media, also can cause faying surface between combined piston can not self-aligning centering, cause high pressure stage piston and low pressure stage piston decentraction, machine run goes down, piston ring, filler can be caused to wear and tear fast especially, can wear and tear time serious cylinder.
The purpose of this utility model is exactly the many defects existed to overcome existing built-up piston, the differential combined piston of the one provided.
the technical solution of the utility model is as follows:
A kind of differential combined piston, comprise high pressure stage piston body, low pressure stage piston body and the piston rod be connected, it is characterized in that one end of high pressure stage piston body is provided with tapped hole, low pressure stage piston body center is provided with step hole, piston rod coordinates location through the step hole on low pressure stage piston body, piston rod end is provided with screw rod and is connected with high pressure stage piston body end thread hole and coordinates, and high pressure stage piston body and low pressure stage piston body is connected as a single entity.
On the basis of technique scheme, there is following further technological scheme:
The Step Shaft of a. high pressure stage piston body is connected with gland coordinate with low pressure stage piston end surface, gland is provided with locating stud and low pressure stage piston location fit, and gland is provided with flange preformed hole;
B. the Step Shaft of high pressure stage piston body connects a lock washer, lock washer edge is provided with a flange, flange coordinates with the flange preformed hole on gland locates, the Step Shaft of high pressure stage piston body is provided with reserved platform, after lock washer assembling, the part of lock washer forms flange through bending and to be formed with reserved platform and coordinate.
The present invention compared with prior art has following shortcoming: mechanical locking device reliability is high, and processing and assembling is easy to assembly, easy to operate.Although piston total height does not become, compared with conventional ASSEMBLE piston structure, piston in combination join strength strengthens greatly, has stopped bolt connection and has easily caused fatigue fracture phenomenon.
accompanying drawing illustrates:
Fig. 1 is sectional view of the present utility model;
Fig. 2 is the structural drawing of the gland in Fig. 1;
Fig. 3 is the structural representation of lock washer;
Fig. 4 is the sectional view of the high pressure stage piston body in Fig. 1;
Fig. 5 is existing built-up piston sectional view;
Fig. 6 is the sectional view of lock washer.
embodiment one:
As Figure 1 and Figure 4, the differential combined piston of the one that the utility model provides, the piston rod 7 comprising high pressure stage piston body 1, low pressure stage piston body 6 and be connected, one end of high pressure stage piston body 1 is provided with tapped hole 1b, low pressure stage piston body 6 center is provided with step hole, piston rod 7 is through the step hole on low pressure stage piston body 6, and rely on step 7a to coordinate with step hole to locate, piston rod 7 end is provided with screw rod 2 and is connected with high pressure stage piston body 1 end thread hole 1b and coordinates, and high pressure stage piston body 1 and low pressure stage piston body 6 is connected as a single entity.
As shown in Figure 1, Figure 2 and Figure 3, the Step Shaft of high pressure stage piston body 1 is connected with gland 4 coordinate with low pressure stage piston 6 end face, high pressure stage piston body 1 and gland 4 all embed in the corresponding step hole of low pressure stage piston 6 end face, gland 4 is provided with positioning pin hole 4b, by locating stud 5 and low pressure stage piston 6 location fit, gland 4 is also provided with flange preformed hole 4a.The effect of gland adds high pressure stage piston body 1 and the area of contact of low pressure stage piston 6, and the low pressure stage piston 6 of low-intensity material was reached unanimity with the working life of the high pressure stage piston body 1 of high-strength material.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, the Step Shaft of high pressure stage piston body 1 connects a lock washer 3, lock washer 3 edge is provided with a flange 3a, flange 3a coordinates with the flange preformed hole 4a on gland 4 and locates, the Step Shaft of high pressure stage piston body 1 is provided with reserved platform 1a, after lock washer 3 assembles, the part of lock washer 3 forms flange 3b through bending and to be formed with reserved platform 1 and coordinate.Lock washer 3 prevents in high pressure stage piston body movement process, and piston rotates around shaft centre line, causes thread looseness.
During assembling, piston rod is run through low pressure stage piston, trim ring, lock washer successively, pin is embedded low pressure stage piston body by trim ring pin-and-hole, lock washer flange is put into trim ring and is reserved circular hole, then high pressure stage piston and piston rod thread are tightened by the moment calculated, finally lock washer is reserved platform gib to high pressure stage piston.
Although piston total height does not become, compared with conventional ASSEMBLE piston structure, piston in combination join strength strengthens greatly, has stopped bolt connection and has easily caused fatigue fracture phenomenon.
Claims (2)
1. a differential combined piston, comprise high pressure stage piston body (1), low pressure stage piston body (6) and the piston rod be connected (7), it is characterized in that one end of high pressure stage piston body (1) is provided with tapped hole (1b), low pressure stage piston body (6) center is provided with step hole, piston rod (7) coordinates location through the step hole on low pressure stage piston body (6), piston rod (7) end is provided with screw rod (2) and is connected with high pressure stage piston body (1) end thread hole (1b) and coordinates, and high pressure stage piston body (1) and low pressure stage piston body (6) is connected as a single entity.
2. the differential combined piston of one according to claim 1, is characterized in that:
The Step Shaft of a. high pressure stage piston body (1) is connected with gland (4) coordinate with low pressure stage piston (6) end face, gland (4) is provided with locating stud (5) and low pressure stage piston (6) location fit, and gland (4) is provided with flange preformed hole (4a);
B. the Step Shaft of high pressure stage piston body (1) connects a lock washer (3), lock washer (3) edge is provided with a flange (3a), flange (3a) coordinates with the flange preformed hole (4a) on gland (4) locates, the Step Shaft of high pressure stage piston body (1) is provided with reserved platform (1a), after lock washer (3) assembling, the part of lock washer (3) forms flange (3b) through bending and to be formed with reserved platform (1a) and coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420861929.9U CN204553158U (en) | 2014-12-31 | 2014-12-31 | A kind of differential combined piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420861929.9U CN204553158U (en) | 2014-12-31 | 2014-12-31 | A kind of differential combined piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204553158U true CN204553158U (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420861929.9U Active CN204553158U (en) | 2014-12-31 | 2014-12-31 | A kind of differential combined piston |
Country Status (1)
| Country | Link |
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| CN (1) | CN204553158U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825469A (en) * | 2018-08-15 | 2018-11-16 | 安徽士必达液压器材有限公司 | A kind of super-pressure pump high-low pressure piston component |
-
2014
- 2014-12-31 CN CN201420861929.9U patent/CN204553158U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825469A (en) * | 2018-08-15 | 2018-11-16 | 安徽士必达液压器材有限公司 | A kind of super-pressure pump high-low pressure piston component |
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| GR01 | Patent grant |