CN202789550U - Bearing component for exhaust end of air compressor - Google Patents
Bearing component for exhaust end of air compressor Download PDFInfo
- Publication number
- CN202789550U CN202789550U CN 201220438850 CN201220438850U CN202789550U CN 202789550 U CN202789550 U CN 202789550U CN 201220438850 CN201220438850 CN 201220438850 CN 201220438850 U CN201220438850 U CN 201220438850U CN 202789550 U CN202789550 U CN 202789550U
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- bearing
- air compressor
- exhaust end
- axial force
- rotor
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- Rolling Contact Bearings (AREA)
Abstract
The utility model discloses a bearing component for an exhaust end of an air compressor and belongs to the technical field of air compressors. The bearing component comprises an inner bearing and an outer bearing, which are sleeved on a rotor from inside to outside, wherein a clearance ring is arranged between the inner bearing and the outer bearing. During the normal operation of the air compressor, the axial force applied on the rotor acts from the exhaust end to the suction end. Therefore, the pre-tightening force and the axial force of the bearing are in the same direction and are added together.
Description
Technical field
The utility model relates to the air compressor technical field, is specifically related to a kind of air compressor exhaust end bearing unit.
Background technique
On the rotor of double-screw air compressor, effect has axial force and radial force.Radial force produces owing to rotor both sides pressure is different, and its size is relevant Bi ﹑ inner pressure ratio and operating conditions with the Chang Jing of Zhuan Zhi Jing ﹑.Because rotor one end is pressure of inspiration(Pi), the other end is exhaust pressure, adds the impact of interior compression process, and a rotor drives the factors such as another rotor, has just produced axial force.The size of axial force is the function of Zhuan Zhi Jing ﹑ inner pressure ratio and operating conditions.Therefore, for the operation that guarantees that compressor is stable, need to advance feasible support at rotor both sides dress bearing.
The oil injection type double-screw air compressor of present stage, a part are to design by the bearing collocation method of bearing respectively; The exhaust end of rotor supports radial and axial with a roller bearing and two to three angular contact ball bearings.The bearing of exhaust end is called the fixed side bearing, and it bears radial and axial two kinds of loads, plays the to axial displacement between stationary axle and the bearing support.Suction end is referred to as free side, only bears radial load with a roller bearing.Simultaneously, after angular contact ball bearing, there is spring that it is applied a thrust, plays the effect of pretension.The advantage of this scheme is the suffered radial force of rotor and axial force, and the bearing by correspondence bears respectively, so that the friction wasted work during bearing operation reduces, has reduced on the one hand the power loss of compressor, has also prolonged on the other hand the working life of bearing.Shortcoming is to use number of bearings more, and cost increases, and especially in middle-size and small-size air compressor, the cost of increase may be up to about 10% of complete machine.
Some air compressor is to design with the form of integrating: they integrate the fixed side bearing, support radial and axial with two tapered roller bearings 1, as shown in Figure 1.The design of tapered roller bearing 1 makes it be specially adapted to bear joint load, acts on simultaneously radial and axial load.The thrust capacity of bearing depends on the size of wrapping angle, and wrapping angle is larger, and loaded capability is higher.Therefore, can select corresponding bearing according to the concrete stressing conditions of compressor.Equally, also there is spring to carry out pretension.The advantage of this scheme is to use number of bearings less, cost.Shortcoming is both bearing radial forces of a bearing, bears again axial force, and the friction wasted work is very large, and the power that consume so that overall performance descends more, and especially in middle-size and small-size air compressor, the wasted work of increase may be up to about 5% of complete machine.
Summary of the invention
Primary and foremost purpose of the present utility model just is to overcome the existing existing deficiency of exhaust end bearing, thereby a kind of air compressor exhaust end bearing unit is provided.
Air compressor exhaust end bearing unit of the present utility model comprises being sheathed on from inside to outside epitrochanterian inner bearing and outer bearing, is provided with a spacer ring between inner bearing and the outer bearing.
Described spacer ring contacts with the outer shaft bearing surface with inner bearing respectively.
The internal diameter of described inner bearing is greater than the internal diameter of outer bearing.
The external diameter of described inner bearing is greater than the external diameter of outer bearing.
Inner bearing of the present utility model is large tapered roller bearing, and outer bearing is the conicle roller bearing.Air compressor is in the process that runs well, and the suffered axial force of rotor is to point to suction end from exhaust end.Only within that a bit of time that shutdown is released, just can be subjected to a power of pointing to exhaust end from suction end.And the axial force of this power when running well is much smaller.The utility model is exactly to adopt the mode of small one and large one two tapered roller bearing pairing usefulness to provide support.Large tapered roller bearing bears the axial force when running well, and the conicle roller bearing bears the axial force of shutting down when releasing.Between big or small tapered roller bearing, install the transfer function that a spacer ring guarantees power additional.
Air compressor is in the process that runs well, and the suffered axial force of rotor is to point to suction end from exhaust end.So, the pretightening force of bearing and axial force in the same way, the addition of making a concerted effort.So, both increased the load of bearing, and caused life-span decline and unnecessary wasted work is arranged.Especially in the air compressor below 22kW, the pretightening force of bearing has reached 1/5th of normal running load.Therefore, adopt a little bearing after, can reduce the pretightening force of bearing, the bearing pre-fastening of new departure is approximately 50% of old form.Bearing axial load when so, air compressor turns round has reduced about 10%.Greatly improve the operating conditions of bearing, also reduced simultaneously about 5% cost.
Description of drawings
Fig. 1 is the application schematic representation of existing tapered roller bearing.
Fig. 2 is application schematic representation of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.Should be understood that following examples are only for explanation the utility model but not for limiting scope of the present utility model.
As shown in Figure 2, a kind of air compressor exhaust end bearing unit of the present utility model comprises being sheathed on from inside to outside epitrochanterian inner bearing 11 and outer bearing 12, is provided with a spacer ring 13 between inner bearing 11 and the outer bearing 12.
Described spacer ring 13 contacts with 12 of inner bearing 11 and outer bearings respectively.
The internal diameter of described inner bearing 11 is greater than the internal diameter of outer bearing 12.
The external diameter of described inner bearing 11 is greater than the external diameter of outer bearing 12.
Inner bearing 11 of the present utility model is large tapered roller bearing, and outer bearing 12 is the conicle roller bearing.Air compressor is in the process that runs well, and the suffered axial force of rotor is to point to suction end from exhaust end.Only within that a bit of time that shutdown is released, just can be subjected to a power of pointing to exhaust end from suction end.And the axial force of this power when running well is much smaller.The utility model is exactly to adopt the mode of small one and large one two tapered roller bearing pairing usefulness to provide support.Large tapered roller bearing bears the axial force when running well, and the conicle roller bearing bears the axial force of shutting down when releasing.Between big or small tapered roller bearing, install the transfer function that a spacer ring 13 guarantees power additional.
Air compressor is in the process that runs well, and the suffered axial force of rotor is to point to suction end from exhaust end.So, the pretightening force of bearing and axial force in the same way, the addition of making a concerted effort.So, both increased the load of bearing, and caused life-span decline and unnecessary wasted work is arranged.Especially in the air compressor below 22kW, the pretightening force of bearing has reached 1/5th of normal running load.Therefore, adopt a little bearing after, can reduce the pretightening force of bearing, the bearing pre-fastening of new departure is approximately 50% of old form.Bearing axial load when so, air compressor turns round has reduced about 10%.Greatly improve the operating conditions of bearing, also reduced simultaneously about 5% cost.
Claims (4)
1. an air compressor exhaust end bearing unit is characterized in that, comprises being sheathed on from inside to outside epitrochanterian inner bearing and outer bearing, is provided with a spacer ring between inner bearing and the outer bearing.
2. air compressor exhaust end bearing unit as claimed in claim 1 is characterized in that, described spacer ring contacts with the outer shaft bearing surface with inner bearing respectively.
3. air compressor exhaust end bearing unit as claimed in claim 1 is characterized in that the internal diameter of described inner bearing is greater than the internal diameter of outer bearing.
4. air compressor exhaust end bearing unit as claimed in claim 1 is characterized in that the external diameter of described inner bearing is greater than the external diameter of outer bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220438850 CN202789550U (en) | 2012-08-30 | 2012-08-30 | Bearing component for exhaust end of air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220438850 CN202789550U (en) | 2012-08-30 | 2012-08-30 | Bearing component for exhaust end of air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789550U true CN202789550U (en) | 2013-03-13 |
Family
ID=47816820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220438850 Expired - Fee Related CN202789550U (en) | 2012-08-30 | 2012-08-30 | Bearing component for exhaust end of air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789550U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485006A (en) * | 2015-11-27 | 2016-04-13 | 上海格什特螺杆科技有限公司 | Screw compressor |
-
2012
- 2012-08-30 CN CN 201220438850 patent/CN202789550U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485006A (en) * | 2015-11-27 | 2016-04-13 | 上海格什特螺杆科技有限公司 | Screw compressor |
| CN105485006B (en) * | 2015-11-27 | 2018-08-21 | 上海格什特螺杆科技有限公司 | A kind of helical-lobe compressor |
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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: 20130313 Termination date: 20180830 |