Bearing chamber structure with aligning function

Abstract

The invention discloses a bearing chamber structure with a self-aligning function, which comprises a main shaft, a bearing arranged on the main shaft, and a bearing seat arranged around the bearing, and is characterized in that an annular spacer is arranged between the outer ring of the bearing and the bearing seat, a groove is arranged on the outer surface of the annular spacer, an elastic element is arranged in the groove, and the elastic element is arranged in the groove. The elastic element is in contact with the annular distance piece and the bearing seat at the same time, the elastic element can prevent the annular distance piece from making contact with the bearing seat, meanwhile, the elastic element and the bearing seat do not slip, and the elastic element and the annular distance piece do not slip.

Description

Technical Field

[0001] The present invention relates to a bearing housing structure for bearing installation, and more particularly to a bearing housing structure with a self-aligning function. Background Art

[0002] Bearings are essential components of rotating machinery. A rotor usually requires two or more bearings for support. These bearing supports need to ensure coaxiality. If the coaxiality is poor, it will cause increased bearing wear during rotation, and further lead to problems such as increased energy consumption and unit failure.

[0003] The commonly used methods to ensure coaxiality are as follows: The first method is to ensure it through the precision of the parts when manufacturing the parts for bearing installation. For example, in a motor, there is a housing and two end covers. There are mounting holes at both ends of the housing. There are flanges on the motor end covers that cooperate with the mounting holes of the housing. In addition, there are bearing mounting holes on the motor end covers. As long as the coaxiality between the housing mounting holes, the end cover flanges, and the end cover bearing holes is ensured, then when assembling the housing and the end cover, the coaxiality of the bearing mounting holes on the end cover can be ensured.

[0004] This method is very convenient. However, between the two bearing mounting holes, there are a total of six geometric features including the first end cover bearing hole, the first end cover flange, the first housing mounting hole, the second housing mounting hole, the second end cover flange, and the second end cover bearing hole. Each feature will bring error accumulation. So ultimately, the coaxiality of the bearing holes on these two end covers is actually not good. If a very high coaxiality is to be ensured, then the machining precision of these six features must be extremely high, which means higher costs.

[0005] The second method is to adjust the coaxiality of the bearing mounting holes during assembly. When installing the housing and the end cover of the motor, the coaxiality of the two bearing mounting holes is measured by a sensor, and the coaxiality is adjusted according to the detection result. After the adjustment is in place, the assembly of the housing and the end cover is fixed.

[0006] For a motor, generally, the diameter of the magnetic segment of the rotor is larger than that of the bearing support. So if the housing is integral, then when assembling the motor, the rotor must be first placed into the housing, and then the end covers are installed from both sides. At this time, the motor main shaft is already inside the bearing mounting holes of the end covers. In this case, it is very difficult to measure the coaxiality of the two bearing mounting holes by a sensor and adjust the coaxiality according to the detection result. After the coaxiality of the bearing mounting holes on the two end covers is adjusted in place, bearings still need to be installed. At this time, the bearings need to match the inner ring and the outer ring at one time. The installation difficulty of such bearings is much higher than that of matching the inner ring or the outer ring alone. Moreover, if the motor rotor is permanent magnet at this time, it will also bring additional interference, making the bearing installation even more difficult.

[0007] If you want to make the operation easier, you must make the casing and end cover into separate parts, separated along the meridian plane. In engineering practice, for convenience, they are generally separated along the horizontal meridian plane. After adjusting the coaxiality of one part - usually the lower half - the motor rotor is inserted into the stator coil, and then installed together into the adjusted casing and end cover, and finally the other half of the casing and end cover are installed. The split casing and end cover will reduce the structural strength of the motor. For water-cooled casings, the split casing also means that there will be more problems with the sealing and connection of the cooling water channel. If the bearing needs to be lubricated, the bearing seat inside the split end cover will also cause sealing problems due to the gap.

[0008] The third method is to use self-aligning bearings. This type of bearing has a lower load capacity than ordinary bearings and a lower speed. It is not suitable for high-speed or heavy-loaded rotating equipment.

[0009] Therefore, developing a bearing chamber structure that is easy to assemble and has a self-aligning function has become an important topic at present. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a bearing chamber structure with a self-aligning function. The technical solution it adopts is: a bearing chamber structure with a self-aligning function, which includes a main shaft, a bearing installed on the main shaft, and a bearing seat arranged around the bearing, characterized in that an annular spacer is also arranged between the outer ring of the bearing and the bearing seat, a groove is arranged on the outer surface of the annular spacer, an elastic element is arranged in the groove, the elastic element is in contact with the annular spacer and the bearing seat at the same time, the elastic element can prevent the annular spacer from contacting the bearing seat, and at the same time, there is no slipping between the elastic element and the bearing seat, and there is no slipping between the elastic element and the annular spacer.

[0011] A further technical feature of the present invention is: The elastic element is a rubber ring.

[0012] The elastic element is a helical spring with a knotted joint.

[0013] The spacer is provided with an avoidance groove on its surface which is communicated with the groove and matches the knotted joint.

[0014] The elastic element is a spiral spring coil welded at the head and tail.

[0015] The elastic element is a rope sleeve component with a knotted joint, and the rope sleeve component comprises a rope and a load-bearing sleeve passing through the rope.

[0016] Isolators are arranged between the bearing sleeves.

[0017] The surface of the annular spacer is provided with an avoidance groove which is communicated with the groove and matches the knotted joint.

[0018] The beneficial effects of the present invention are as follows: Since an annular spacer is further provided between the outer ring of the bearing and the bearing housing, a groove is provided on the outer surface of the annular spacer, and an elastic element is provided in the groove. The elastic element is in contact with both the spacer and the bearing housing at the same time. The elastic element can prevent the annular spacer and the bearing housing from coming into contact, and at the same time, there is no slipping between the elastic element and the bearing housing, and no slipping between the elastic element and the annular spacer. In this way, a gap is formed between the annular spacer and the bearing housing. When the two bearing housings are not coaxial, because there is a gap between the annular spacer and the bearing housing, the annular spacer will move together with the bearing until the two bearings are coaxial, thus realizing the self-aligning function. Description of the Drawings

[0019] Figure 1 is a structural sectional view of an embodiment of the present invention; Figure 2 is a schematic assembly structure diagram of an annular spacer and an elastic element; Figure 3 is another schematic assembly structure diagram of an annular spacer and an elastic element. Detailed Embodiments

[0020] The present invention will be further described in detail below with reference to the drawings.

[0021] As Figures 1 to 2 shown, a bearing housing structure with a self-aligning function includes a main shaft 1, a bearing 2 installed on the main shaft, and a bearing housing 3 arranged around the bearing. An annular spacer 4 is further provided between the outer ring of the bearing 2 and the bearing housing 3. A groove 41 is provided on the outer surface of the annular spacer 4, and an elastic element 5 is provided in the groove 41. The elastic element 5 is in contact with both the annular spacer 4 and the bearing housing 3 at the same time. The elastic element 5 can prevent the annular spacer 4 and the bearing housing 5 from coming into contact, and at the same time, there is no slipping between the elastic element 5 and the bearing housing 3, and no slipping between the elastic element 5 and the annular spacer 4.

[0022] In this embodiment, the elastic element 5 is Figure 2 shown as a helical spring with a knotted joint 51. An avoidance groove 42 communicating with the groove 41 and matching the knotted joint 51 is provided on the surface of the annular spacer 4.

[0023] In another embodiment, the elastic element 5 is as Figure 3As shown, there is a rope sleeve component, which includes a rope 52 and a bearing sleeve 53 sleeved on the rope. When the entire circumference is covered by the bearing sleeve 53, if it is too tight between the bearing seat 3 and the annular spacer 4, a spacer 54 can be arranged between the bearing sleeves, and the pressing force between the bearing seat 3 and the annular spacer 4 can be adjusted by adjusting the ratio between the bearing sleeve 53 and the spacer 54. In this embodiment, an avoidance groove 42 communicating with the groove 41 and matching the knot joint 51 is arranged on the surface of the annular spacer 4.

[0024] In practical applications, the elastic element 5 can also be a rubber ring or a spiral spring ring welded at both ends.

[0025] Since an annular spacer 4 is also arranged between the outer ring of the bearing 2 and the bearing seat 3, a groove 41 is arranged on the outer surface of the spacer 4, and an elastic element 5 is arranged in the groove 41. The elastic element 5 is in contact with both the spacer and the bearing seat at the same time. The elastic element 5 can prevent the annular spacer 4 and the bearing seat 3 from coming into contact, and at the same time, the elastic element 5 can also prevent the annular spacer 4 and the bearing seat 3 from sliding relative to each other. In this way, a gap is formed between the annular spacer 4 and the bearing seat 3. When the two bearing seats 3 are not coaxial, because there is a gap between the annular spacer 4 and the bearing seat 3, the annular spacer 4 will move together with the bearing 2 until the two bearings 2 are coaxial, thus realizing the self-aligning function.

[0026] The technical content and technical features of the present invention have been disclosed as above. However, it can be understood that under the spirit and creative idea of the present invention, those skilled in the art can make various changes and improvements to the above structure, including combinations of the technical features disclosed or claimed here alone, and other combinations that obviously include these features. These deformations and / or combinations all fall within the technical field involved in the present invention and within the protection scope of the claims of the present invention.

Claims

1. A bearing housing structure with self-aligning function, which includes a main shaft, a bearing installed on the main shaft, and a bearing housing arranged around the bearing, and is characterized in that: An annular spacer is also provided between the outer ring of the bearing and the bearing housing. Grooves are provided on the outer surface of the annular spacer, and elastic elements are provided in the grooves. The elastic elements are in contact with both the annular spacer and the bearing housing simultaneously. The elastic elements can prevent the annular spacer and the bearing housing from coming into contact, and there is no slipping between the elastic elements and the bearing housing, nor is there any slipping between the elastic elements and the annular spacer.

2. The bearing housing structure with a centering function according to claim 1, wherein: The elastic element is a rubber ring.

3. The bearing housing structure with a centering function according to claim 1, characterized in that: The elastic element is a helical spring with a knotted joint.

4. The bearing housing structure with self-aligning function according to claim 3, characterized in that: Avoidance grooves that are communicated with the grooves and match the knotted joint are provided on the surface of the spacer.

5. The bearing housing structure with a centering function according to claim 1, characterized in that: The elastic element is a helical spring coil with the head and tail welded.

6. The bearing chamber structure with a centering function according to claim 1, characterized in that: The elastic element is a rope sleeve with a knotted joint. The rope sleeve includes a rope and a load-bearing sleeve sleeved on the rope.

7. The bearing housing structure with a centering function as described in claim 6, characterized in that: Isolation members are provided between the load-bearing sleeves.

8. The bearing housing structure with self-aligning function according to claim 6, characterized in that: Avoidance grooves that are communicated with the grooves and match the knotted joint are provided on the surface of the annular spacer.

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