CN220320230U - Eccentric shaft structure with rolling bearing at non-driving end of crankshaft - Google Patents
Eccentric shaft structure with rolling bearing at non-driving end of crankshaft Download PDFInfo
- Publication number
- CN220320230U CN220320230U CN202320955621.XU CN202320955621U CN220320230U CN 220320230 U CN220320230 U CN 220320230U CN 202320955621 U CN202320955621 U CN 202320955621U CN 220320230 U CN220320230 U CN 220320230U
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- China
- Prior art keywords
- eccentric
- rolling bearing
- shaft structure
- eccentric shaft
- crankshaft
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- 238000005096 rolling process Methods 0.000 title claims abstract description 57
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 6
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 6
- 229920002530 polyetherether ketone Polymers 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model relates to the field of diaphragm compressors, in particular to an eccentric shaft structure with a rolling bearing at a non-driving end of a crankshaft. The connecting shaft is provided with an eccentric shaft structure, a rolling bearing is fixedly arranged on the outer side of the eccentric shaft structure, an inner ring of the rolling bearing is fixedly connected with the eccentric shaft structure, and an outer ring of the rolling bearing is in rolling contact with a plunger of the plunger pump. The outer side of the eccentric shaft structure on the connecting shaft is fixedly provided with the rolling bearing, the outer ring of the rolling bearing is in rolling contact with the plunger of the plunger pump, so that the sliding contact between the plunger and the eccentric shaft in the past is replaced, the friction force is greatly reduced, the stress of the rolling friction integral structure is better, the friction force is greatly reduced, the plunger and the eccentric shaft structure are well protected, the service life is prolonged, the operation precision is improved, and the maintenance cost is reduced.
Description
Technical field:
the utility model relates to the field of diaphragm compressors, in particular to an eccentric shaft structure with a rolling bearing at a non-driving end of a crankshaft.
The background technology is as follows:
in the diaphragm compressor, the non-driving end of a crankshaft is generally provided with an eccentric shaft, the eccentric shaft is matched with a plunger pump to provide power for the plunger pump, and the plunger pump resets a plunger by means of elasticity of an internal spring of the plunger pump, so that pressurized supply of hydraulic oil is realized. Wherein, be sliding contact between plunger and the eccentric shaft, because plunger and eccentric shaft all are the metal material, all take a PEEK cover on the plunger in the past, through PEEK cover and eccentric shaft to grinding, during long-time work, PEEK cover and eccentric shaft sliding friction, PEEK cover wearing and tearing very easily influence life and running accuracy, and can't restore after wearing and tearing, need often change, increased cost of maintenance.
In summary, the problem of wear of the PEEK sleeve between the eccentric shaft and the plunger in the diaphragm compressor has become a technical problem to be solved in industry.
The utility model comprises the following steps:
the utility model provides an eccentric shaft structure with a rolling bearing at a non-driving end of a crankshaft, which aims to make up the defects of the prior art and solves the problems that the PEEK sleeve between an eccentric shaft and a plunger is seriously worn in sliding contact and affects the service life and the operation precision in the past.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the eccentric shaft structure with the rolling bearing at the non-driving end of the crankshaft comprises a connecting shaft connected with the non-driving end of the crankshaft, wherein the connecting shaft is provided with the eccentric shaft structure, the rolling bearing is fixedly arranged at the outer side of the eccentric shaft structure, the inner ring of the rolling bearing is fixedly connected with the eccentric shaft structure, and the outer ring of the rolling bearing is in rolling contact with a plunger of a plunger pump.
The eccentric shaft structure comprises a plurality of eccentric sleeves sleeved on the connecting shaft.
The eccentric sleeve is clamped and fixed through a locking nut in threaded connection with the connecting shaft and a shaft shoulder arranged on the connecting shaft.
And a locking washer is arranged between the locking nut and the eccentric sleeve.
The number of the eccentric sleeves is two, the two eccentric sleeves are sleeved on the connecting shaft side by side, the eccentric directions of the two eccentric sleeves are different, rolling bearings are respectively arranged on the two eccentric sleeves, and each rolling bearing corresponds to one plunger pump.
And a limiting flange for limiting the rolling bearing is arranged on the eccentric sleeve.
The eccentric sleeve is in interference fit press fit connection with the inner ring of the rolling bearing.
The eccentric sleeve is connected with the connecting shaft through a key.
The utility model adopts the scheme and has the following advantages:
the outer side of the eccentric shaft structure on the connecting shaft is fixedly provided with the rolling bearing, the outer ring of the rolling bearing is in rolling contact with the plunger of the plunger pump, so that the sliding contact between the plunger and the eccentric shaft in the past is replaced, the friction force is greatly reduced, the stress of the rolling friction integral structure is better, the friction force is greatly reduced, the plunger and the eccentric shaft structure are well protected, the service life is prolonged, the operation precision is improved, and the maintenance cost is reduced.
Description of the drawings:
fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is a schematic cross-sectional view of the present utility model.
In the figure, 1, a connecting shaft, 2, a rolling bearing, 3, a plunger pump, 4, a plunger, 5, an eccentric sleeve, 6, a lock nut, 7, a lock washer, 8 and a limit flange.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in figures 1-2, the eccentric shaft structure with the rolling bearing at the non-driving end of the crankshaft comprises a connecting shaft 1 connected with the non-driving end of the crankshaft, wherein the connecting shaft 1 is provided with the eccentric shaft structure, the outer side of the eccentric shaft structure is fixedly provided with the rolling bearing 2, the inner ring of the rolling bearing 2 is fixedly connected with the eccentric shaft structure, and the outer ring of the rolling bearing 2 is in rolling contact with a plunger 4 of a plunger pump 3.
The eccentric shaft structure comprises a plurality of eccentric sleeves 5 sleeved on the connecting shaft 1, the eccentric sleeves 5 are convenient to process, and can be replaced independently after being damaged, so that the maintenance cost is reduced.
The eccentric sleeve 5 is clamped and fixed through a locking nut 6 in threaded connection with the connecting shaft 1 and a shaft shoulder arranged on the connecting shaft 1, so that the eccentric sleeve is convenient to install and detach.
A locking washer 7 is arranged between the locking nut 6 and the eccentric sleeve 5 so as to firmly install the eccentric sleeve 5.
The number of the eccentric sleeves 5 is two, the two eccentric sleeves 5 are sleeved on the connecting shaft 1 side by side, the eccentric directions of the two eccentric sleeves 5 are different, the two eccentric sleeves 5 are respectively provided with the rolling bearings 2, each rolling bearing 2 corresponds to one plunger pump 3, and one-stage and two-stage pressurization of hydraulic oil can be realized.
The eccentric sleeve 5 is provided with a limiting flange 8 for limiting the rolling bearing 2, so that the rolling bearing 2 can be prevented from displacement.
The eccentric sleeve 5 is in interference fit press fit connection with the inner ring of the rolling bearing 2.
The eccentric sleeve 5 is connected with the connecting shaft 1 by a key, so that the eccentric sleeve 5 can be prevented from rotating.
Working principle:
during operation, the connecting shaft 1 drives the eccentric sleeve 5 to rotate, the eccentric sleeve 5 drives the plunger 4 to reciprocate in the plunger pump 3 during rotation, the plunger pump 3 enables the plunger 4 to reset by means of elasticity of an internal spring of the plunger pump, the plunger 3 and the rolling bearing 2 on the eccentric sleeve 5 always keep rolling contact, pressurized supply of hydraulic oil is achieved, the rolling friction overall structure between the rolling bearing 2 and the plunger 4 is better in stress, friction force is greatly reduced, good protection effect is achieved on the plunger 4 and the eccentric sleeve 5, service life is prolonged, operation precision is improved, and maintenance cost is reduced.
The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (8)
1. An eccentric shaft structure with rolling bearings at the non-driving end of a crankshaft is characterized in that: the connecting shaft is provided with an eccentric shaft structure, a rolling bearing is fixedly arranged on the outer side of the eccentric shaft structure, an inner ring of the rolling bearing is fixedly connected with the eccentric shaft structure, and an outer ring of the rolling bearing is in rolling contact with a plunger of the plunger pump.
2. An eccentric shaft structure with rolling bearing at non-driving end of crankshaft as claimed in claim 1, wherein: the eccentric shaft structure comprises a plurality of eccentric sleeves sleeved on the connecting shaft.
3. An eccentric shaft structure with rolling bearing at non-driving end of crankshaft as claimed in claim 2, wherein: the eccentric sleeve is clamped and fixed through a locking nut in threaded connection with the connecting shaft and a shaft shoulder arranged on the connecting shaft.
4. A crankshaft non-drive end eccentric shaft structure with rolling bearing as claimed in claim 3, wherein: and a locking washer is arranged between the locking nut and the eccentric sleeve.
5. An eccentric shaft structure with rolling bearing at non-driving end of crankshaft as claimed in claim 2, wherein: the number of the eccentric sleeves is two, the two eccentric sleeves are sleeved on the connecting shaft side by side, the eccentric directions of the two eccentric sleeves are different, rolling bearings are respectively arranged on the two eccentric sleeves, and each rolling bearing corresponds to one plunger pump.
6. An eccentric shaft structure with rolling bearing at non-driving end of crankshaft as claimed in claim 2, wherein: and a limiting flange for limiting the rolling bearing is arranged on the eccentric sleeve.
7. An eccentric shaft structure with rolling bearing at non-driving end of crankshaft as claimed in claim 2, wherein: the eccentric sleeve is in interference fit press fit connection with the inner ring of the rolling bearing.
8. An eccentric shaft structure with rolling bearing at non-driving end of crankshaft as claimed in claim 2, wherein: the eccentric sleeve is connected with the connecting shaft through a key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320955621.XU CN220320230U (en) | 2023-04-20 | 2023-04-20 | Eccentric shaft structure with rolling bearing at non-driving end of crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320955621.XU CN220320230U (en) | 2023-04-20 | 2023-04-20 | Eccentric shaft structure with rolling bearing at non-driving end of crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220320230U true CN220320230U (en) | 2024-01-09 |
Family
ID=89409950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320955621.XU Active CN220320230U (en) | 2023-04-20 | 2023-04-20 | Eccentric shaft structure with rolling bearing at non-driving end of crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220320230U (en) |
-
2023
- 2023-04-20 CN CN202320955621.XU patent/CN220320230U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |