Bearing fastening device for roots blower
By setting specific grooves and threaded holes on the outer ring and bearing seat of the Roots blower, and using locking screws to achieve full-circuit locking and fixing, the problem of bearing shaking and falling off in the Roots blower is solved, and the bearing is realized Stable fixation and long-term stable operation of the blower.
Patent Information
- Application Number
- CN202421535061.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-07-01
AI Technical Summary
In the existing Roots blowers, due to the clearance fit between the bearing and the bearing seat, the main shaft may easily cause the bearing to shake, shift and fall off when rotating at high speed, resulting in increased wear, increased noise and increased maintenance costs, affecting the long-term stability of the blower. run.
Design a bearing fastening device for Roots blower. By setting a plurality of long grooves on the outer surface of the bearing outer ring and setting a plurality of radially penetrated thread holes on the bearing seat, the bearing is realized by using locking screws. The seat and the outer ring of the bearing are locked and fixed in all directions to prevent the bearing from shaking or falling off when rotating at high speed.
It effectively prevents the bearing from shaking and falling off when rotating at high speed, reduces wear and noise, extends the service life of bearings and bearing seats, reduces maintenance costs, and ensures the long-term stable operation of the Roots blower.
Smart Images
Figure CN222502447U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a Roots blower, in particular to a bearing fastening device for the Roots blower. Background Art
[0002] Roots blower is a volumetric forced gas transmission equipment. Due to its simple structure, easy manufacturing, simple operation and long maintenance cycle, it is widely used in pneumatic transmission to achieve gas transportation and pressurization, and is applied to fields such as petroleum, chemical industry and power plants.
[0003] A Roots blower is provided with a main shaft inside, and its two ends are supported by bearings for high-speed rotation, thereby realizing the blowing operation. However, in the existing Roots blower, since the bearings and the bearing seats are usually clearance-fitted, when the main shaft rotates at high speed, the bearing as a whole is prone to shaking and shifting, resulting in varying degrees of wear between the bearings and the bearing seats, and the service life of the bearings and the bearing seats is significantly reduced. In addition, long-term shaking of the bearings will cause the operating noise of the blower to increase, and even cause the bearing to fall off, thereby increasing maintenance costs, and ultimately causing the blower to be unable to operate stably for a long time. Utility Model Content
[0004] In view of the above technical problems, the utility model provides a bearing fastening device for a Roots blower. When the main shaft rotates at a high speed, the bearing will not shake, shift, or even fall off, thereby reducing maintenance costs, reducing the operating noise of the blower, and ensuring that the blower can operate stably for a long time.
[0005] To this end, the technical solution of the utility model is a bearing fastening device for a Roots blower, which is provided with a main shaft, the outer circumference of the main shaft is provided with a bearing, the bearing comprises a bearing outer ring and a bearing inner ring, the bearing inner ring is fixedly connected to the outer circumference of the main shaft, and the outer circumference of the bearing outer ring is provided with a bearing seat;
[0006] The outer surface of the bearing outer ring is provided with a groove, the bearing seat is provided with a radially penetrating threaded hole, and the threaded hole on the bearing seat is provided with a locking screw. The locking screw passes through the threaded hole on the bearing seat and the groove thread on the outer surface of the bearing outer ring to lock the bearing seat and the bearing outer ring.
[0007] Preferably, the groove is an elongated groove axially penetrating the outer surface of the bearing outer ring.
[0008] Preferably, there are multiple elongated grooves, and the multiple elongated grooves are evenly distributed along the circumferential direction on the outer surface of the bearing outer ring.
[0009] Preferably, there are multiple threaded holes on the bearing seat, and the multiple threaded holes are respectively arranged at radially symmetrical positions close to both ends of the elongated groove.
[0010] Preferably, the number of the elongated grooves is four, and the four elongated grooves are evenly distributed along the circumferential direction on the outer surface of the bearing outer ring.
[0011] The beneficial effect of the utility model is that by arranging a plurality of elongated grooves on the outer surface of the bearing outer ring and a plurality of penetrating threaded holes on the bearing seat, the plurality of threaded holes are respectively arranged at radially symmetrical positions near both ends of the elongated grooves. During installation, locking screws are respectively passed through the plurality of threaded holes on the bearing seat, and then radial locking is achieved at the positions near both ends of the plurality of elongated grooves, which can simultaneously increase the axial locking spacing and the uniformity of circumferential locking between the bearing seat and the bearing outer ring, thereby achieving all-round locking and fixation between the bearing seat and the bearing, and finally achieving locking and fixation between the bearing seat and the bearing, which can ensure that when the main shaft rotates at high speed, the bearing as a whole will not shake, shift, or even fall off, thereby reducing maintenance costs, reducing the operating noise of the blower, and further ensuring that the blower can operate stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is the front view of the utility model;
[0013] Figure 2 This utility model Figure 1 Middle AA section view;
[0014] Figure 3 This utility model Figure 2 Enlarged view of point B in the middle;
[0015] Figure 4 This is the front view of the bearing structure of the utility model;
[0016] Figure 5 It is a right view of the bearing structure of the utility model.
[0017] Explanation of symbols in the figure:
[0018] 1. Bearing seat; 101. Threaded hole; 2. Bearing; 201. Bearing outer ring; 202. Bearing inner ring; 203. Groove; 3. Spindle; 4. Locking screw. DETAILED DESCRIPTION
[0019] The utility model is further described below in conjunction with embodiments.
[0020] pass Figure 1-Figure 5 It can be seen that the bearing fastening device for the Roots blower is provided with a main shaft 3, the outer circumference of the main shaft 3 is provided with a bearing 2, the bearing 2 includes a bearing outer ring 201 and a bearing inner ring 202, the bearing inner ring 202 is fixedly connected to the outer circumference of the main shaft 3, and the outer circumference of the bearing outer ring 201 is provided with a bearing seat 1.
[0021] A groove 203 is provided on the outer surface of the bearing outer ring 201, and a radially penetrating threaded hole 101 is provided on the bearing seat 1. A locking screw 4 is provided in the threaded hole 101 on the bearing seat 1. The locking screw 4 passes through the threaded hole 101 on the bearing seat 1 and the groove 203 on the outer surface of the bearing outer ring 201 and is threadedly locked to achieve radial locking between the bearing seat 1 and the bearing outer ring 201, which can prevent the bearing 2 from shaking due to inertia when the main shaft 3 rotates at high speed.
[0022] The groove 203 is an elongated groove that axially penetrates the outer surface of the bearing outer ring 201. There are multiple elongated grooves, which are evenly distributed along the circumferential direction on the outer surface of the bearing outer ring 201. There are multiple threaded holes 101 on the bearing seat 1, which are respectively arranged at radially symmetrical positions near both ends of the elongated groove. When installing and fixing, the locking screws 4 are respectively passed through the multiple threaded holes 101 on the bearing seat 1 to achieve radial locking at the positions near both ends of the multiple elongated grooves.
[0023] By providing a plurality of elongated grooves, and the plurality of elongated grooves are evenly distributed along the circumferential direction of the bearing outer ring 201, and by radially locking the plurality of elongated grooves at positions close to both ends thereof with locking screws 4, the axial locking distance and the uniformity of the circumferential locking between the bearing seat 1 and the bearing outer ring 201 can be increased at the same time, thereby achieving all-round locking and fixation between the bearing seat 1 and the bearing 2, and further preventing the bearing from shaking or even falling off when the main shaft rotates at high speed.
[0024] In addition, the groove 203 is set as a long strip groove. Compared with a circular groove, the bearing 2 can be locked more quickly and accurately through the locking screw 4, which shortens the operation time and improves work efficiency. Specifically, the groove 203 is set as a long strip groove. When installing the bearing 2, the operator only needs to move the bearing 2 to the middle position of the bearing seat 1, and then pass the locking screws 4 through the multiple threaded holes 101 on the bearing seat 1 respectively to quickly lock the multiple long strip grooves on the bearing 2 near the two ends. The operation process saves time and effort and greatly improves work efficiency.
[0025] There are four long strip grooves, which are evenly distributed along the circumferential direction on the outer surface of the bearing outer ring 201. The number of long strip grooves is set based on a design scheme obtained after a long-term stability operation test. Setting the number of long strip grooves to four can not only ensure the locking stability between the bearing seat 1 and the bearing 2, but also reduce the processing cost.
[0026] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.
Claims
1. A bearing fastening device for a Roots blower, characterized in that: A main shaft is provided, and a bearing is provided on the outer circumference of the main shaft, and the bearing comprises a bearing outer ring and a bearing inner ring, and the bearing inner ring is fixedly connected to the outer circumference of the main shaft, and a bearing seat is provided on the outer circumference of the bearing outer ring; The outer surface of the bearing outer ring is provided with a groove, the bearing seat is provided with a radially penetrating threaded hole, and a locking screw is provided in the threaded hole on the bearing seat. The locking screw passes through the threaded hole on the bearing seat and the groove on the outer surface of the bearing outer ring and is thread-locked to fix and lock the bearing seat and the bearing outer ring.
2. The bearing fastening device for Roots blower according to claim 1, characterized in that: The groove is a long strip groove that axially penetrates the outer surface of the bearing outer ring.
3. The bearing fastening device for Roots blower according to claim 2, characterized in that: There are multiple elongated grooves, and the multiple elongated grooves are evenly distributed along the circumferential direction on the outer surface of the bearing outer ring.
4. The bearing fastening device for Roots blower according to claim 3, characterized in that: There are multiple threaded holes on the bearing seat, and the multiple threaded holes are respectively arranged at radially symmetrical positions close to both ends of the long strip groove.
5. The bearing fastening device for Roots blower according to claim 3, characterized in that: The number of the elongated grooves is four, and the four elongated grooves are evenly distributed along the circumferential direction on the outer surface of the bearing outer ring.