Bearing chamber structure with cooling function
By setting up rotor auxiliary parts and cooling oil circuits in the bearing chamber structure, the problem of difficulty in cooling the bearing inner ring is solved, effective cooling and extended service life are achieved, and stable operation of the bearing is ensured.
Patent Information
- Application Number
- CN202510569355.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-01
- Publication Date
- 2025-06-06
AI Technical Summary
The existing bearing cooling method is difficult to effectively cool the bearing inner ring, resulting in increased bearing wear and shortened service life.
A bearing chamber structure with cooling function is designed. By setting rotor auxiliary parts on both sides of the bearing inner ring and setting oil inlet and return oil circuits on the bearing seat, cooling oil reaches the rotor auxiliary parts through the oil supply branch, and heat from the bearing inner ring is taken away.
Effectively cool the inner ring of the bearing, extend the service life of the bearing, and through the cooperation of the annular spacer and elastic elements, the center-aligning function and cooling effect are achieved while ensuring the stable operation of the bearing.
Smart Images
Figure CN120100826A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a bearing chamber structure for bearing installation, and more particularly to a bearing chamber structure with a cooling function. Background Art
[0002] Bearings are essential components of rotating machinery, and a rotor usually requires two or more bearing supports. During the operation of the machine, these bearing supports will generate heat due to friction. In some application scenarios, such as motors or compressors, other surrounding components may also generate heat, and this heat will eventually be transferred to the bearings.
[0003] If the bearing temperature rises, deformation will occur due to thermal expansion and contraction, the bearing wear will increase, and eventually lead to bearing failure. In fact, excessive bearing temperature leading to bearing wear is one of the main factors of bearing wear.
[0004] Common bearing cooling methods are as follows: The first and most common bearing cooling method is oil mist lubrication. The lubricating oil is atomized into small droplets and mixed with high-pressure air at room temperature or low temperature. A nozzle is arranged near the bearing, and the high-pressure air passes through the nozzle to form a high-speed airflow carrying the atomized lubricating oil into the bearing. The lubricating oil mist adheres to the rolling elements of the bearing to achieve lubrication, and the remaining air flow at room temperature or low temperature takes away the heat.
[0005] There are some problems with this method. First, when the bearing rotates at high speed, a strong vortex airflow will be formed around the rolling element. If the airflow speed of the sprayed oil mist is not high enough, it will be blown away by the vortex around the rolling element, and the oil mist cannot enter the rolling element, and lubrication cannot be achieved.
[0006] If you want to increase the oil mist injection speed, there are two ways. One way is to reduce the nozzle aperture, so that the oil mist droplets may adhere to the nozzle and cause the nozzle to be blocked. The other way is to increase the injection air pressure while ensuring the nozzle aperture, which will cause a significant increase in the amount of air and oil mist flowing in. If the exhaust and oil return speeds are not fast enough, the oil mist will escape from the bearing chamber into other nearby equipment, causing other problems.
[0007] The second method is to embed a water channel inside the bearing seat, close to the bearing, and remove the heat by flowing cooling water or cooling oil in the water channel. Obviously, this method can only cool the outer ring of the bearing, but not the inner ring of the bearing. In most bearings, the inner ring heats up more seriously than the outer ring during operation.
[0008] Therefore, developing a bearing chamber structure that can cool the inner ring of the bearing has become an important topic at present. Summary of the invention
[0009] The technical problem to be solved by the present invention is to provide a bearing chamber structure with a cooling function. A technical solution adopted by the present invention is: a bearing chamber structure with a cooling function, comprising a main shaft, a bearing mounted on the main shaft, a bearing seat arranged around the bearing, and a first cover plate and a second cover plate fixedly connected to the bearing seat, characterized in that: a first rotor auxiliary part and a second rotor auxiliary part are also arranged on both sides of the bearing on the main shaft, the first rotor auxiliary part and the second rotor auxiliary part are respectively abutted against the two side surfaces of the inner ring of the bearing, an oil inlet passage and an oil return passage are arranged on the bearing seat, a first oil supply branch for supplying cooling oil to the first rotor auxiliary part is arranged on the first cover plate, the upper end of the first oil supply branch is connected to the oil inlet passage on the bearing seat, and the lower end of the first oil supply branch is connected to the oil return passage on the bearing seat; a second oil supply branch for supplying cooling oil to the second rotor auxiliary part is arranged on the second cover plate, the upper end of the second oil supply branch is connected to the oil inlet passage on the bearing seat, and the lower end of the second oil supply branch is connected to the oil return passage on the bearing seat.
[0010] The cooling oil enters the first oil supply branch on the first cover plate from the oil inlet on the bearing seat, flows to the first rotor auxiliary part, and the first rotor auxiliary part contacts the inner ring of the bearing, so that the heat of the inner ring of the bearing will be taken away by the cooling oil, and then flows out from the return oil passage on the bearing seat. Similarly, another cooling oil enters the second oil supply branch on the second cover plate from the oil inlet on the bearing seat, flows to the second rotor auxiliary part, and the second rotor auxiliary part contacts the inner ring of the bearing, so that the heat of the inner ring of the bearing will be taken away by the cooling oil, and finally flows out from the return oil passage on the bearing seat, which can effectively cool the inner ring of the bearing and extend the service life of the bearing.
[0011] The technical solution of the present invention further has the following technical features: 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; the annular spacer is also respectively provided with an oil inlet through hole and an oil return through hole at the position corresponding to the first oil supply branch.
[0012] Since 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, and an elastic element is arranged in the groove, the elastic element is in contact with the spacer and the bearing seat at the same time, and 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, so that a gap is formed between the annular spacer and the bearing seat. When the two bearing seats are not coaxial, because there is a gap between the annular spacer and the bearing seat, the annular spacer will move together with the bearing until the two bearings are coaxial, thereby realizing the function of self-alignment.
[0013] The annular spacer is also provided with an oil inlet through hole and an oil return through hole at positions corresponding to the first oil supply branch, so as to ensure the realization of the self-aligning function and the realization of the cooling function for the inner ring of the bearing.
[0014] The elastic element is a rubber ring or a spiral spring ring welded at the head and tail.
[0015] Another technical solution adopted by the present invention is: 14. The cooling device of claim 13, wherein the first and second bearing seats are provided with a first oil supply branch which is connected to the oil supply branch of the bearing seat and a second oil supply branch which is connected to the oil supply branch of the bearing seat.
[0016] The cooling oil enters the oil gap between the first cover plate and the bearing from the oil inlet on the bearing seat, and flows to the first rotor auxiliary part. The first rotor auxiliary part contacts the inner ring of the bearing, so that the heat of the inner ring of the bearing will be taken away by the cooling oil, and finally the cooling oil flows out from the return oil passage on the bearing seat. Similarly, another cooling oil enters the second oil supply branch on the second cover plate from the oil inlet on the bearing seat, and flows to the second rotor auxiliary part. The second rotor auxiliary part contacts the inner ring of the bearing, so that the heat of the inner ring of the bearing will be taken away by the cooling oil, and finally the cooling oil flows out from the return oil passage on the bearing seat, which can effectively cool the inner ring of the bearing and extend the service life of the bearing.
[0017] The further technical features of this technical solution are: 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; the annular spacer is also provided with an oil inlet hole and an oil return hole at the position corresponding to the oil slit.
[0018] Since 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, and an elastic element is arranged in the groove, the elastic element is in contact with the spacer and the bearing seat at the same time, and 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, so that a gap is formed between the annular spacer and the bearing seat. When the two bearing seats are not coaxial, because there is a gap between the annular spacer and the bearing seat, the annular spacer will move together with the bearing until the two bearings are coaxial, thereby realizing the function of self-alignment.
[0019] The annular spacer is also provided with an oil inlet hole and an oil return hole at a position corresponding to the oil passage slit, which ensures the realization of the self-aligning function while also ensuring the realization of the cooling function for the inner ring of the bearing.
[0020] The elastic element is a rubber ring or a spiral spring ring welded at the head and tail. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a structural cross-sectional view of a first embodiment of the present invention; Figure 2 is a structural cross-sectional view of a second embodiment of the present invention; Figure 3 is a structural cross-sectional view of a third embodiment of the present invention; Figure 4 is a structural cross-sectional view of a fourth embodiment of the present invention DETAILED DESCRIPTION
[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0023] The first embodiment Figure 1As shown, a bearing chamber structure with cooling function comprises a main shaft 1, a bearing 2 mounted on the main shaft 1, a bearing seat 3 arranged around the bearing, a first cover plate 4 and a second cover plate 5 fixedly connected to the bearing seat 3, characterized in that: a first rotor auxiliary part 6 and a second rotor auxiliary part 7 are also arranged on both sides of the bearing 2 on the main shaft, the first rotor auxiliary part 6 and the second rotor auxiliary part 7 are respectively abutted against the two side surfaces of the inner ring of the bearing, an oil inlet passage 31 and an oil return passage 32 are arranged on the bearing seat 3, and the first The cover plate 4 is provided with a first oil supply branch 41 for supplying cooling oil to the first rotor auxiliary part 6, the upper end of the first oil supply branch 41 is communicated with the oil inlet circuit 31 on the bearing seat 3, and the lower end of the first oil supply branch 41 is communicated with the oil return circuit 32 on the bearing seat 3; the second cover plate 5 is provided with a second oil supply branch 51 for supplying cooling oil to the second rotor auxiliary part 7, the upper end of the second oil supply branch 51 is communicated with the oil inlet circuit 31 on the bearing seat 3, and the lower end of the second oil supply branch 51 is communicated with the oil return circuit 32 on the bearing seat 3.
[0024] The cooling oil enters the first oil supply branch 41 on the first cover plate 4 from the oil inlet on the bearing seat 3, and flows to the first rotor auxiliary part 6. The first rotor auxiliary part 6 is in contact with the inner ring of the bearing 2, so that the heat of the inner ring of the bearing 2 will be taken away by the cooling oil, and the cooling oil will finally flow out from the return oil passage 32 on the bearing seat 3. Similarly, another cooling oil enters the second oil supply branch 51 on the second cover plate 5 from the oil inlet 31 on the bearing seat 3, and flows to the second rotor auxiliary part 7. The second rotor auxiliary part 7 is in contact with the inner ring of the bearing 2, so that the heat of the inner ring of the bearing 2 will be taken away by the cooling oil, and the cooling oil will finally flow out from the return oil passage 32 on the bearing seat 3, which can well cool the inner ring of the bearing and extend the service life of the bearing.
[0025] The second embodiment Figure 2 As shown, this embodiment is based on the first embodiment, and an annular spacer 8 is further arranged between the outer ring of the bearing 2 and the bearing seat 3, and a groove 81 is arranged on the outer surface of the annular spacer 8, and an elastic element (not shown in the figure) is arranged in the groove 81. The elastic element is in contact with the annular spacer 8 and the bearing seat 3 at the same time. The elastic element can prevent the annular spacer 8 from contacting the bearing seat 3, and there is no slippage between the elastic element and the bearing seat 3, and there is no slippage between the elastic element and the annular spacer 8; at the same time, the annular spacer 8 is also provided with an oil inlet through hole 82 and an oil return through hole 83 at the position corresponding to the first oil supply branch 41.
[0026] Since an annular spacer 8 is also arranged between the outer ring of the bearing 2 and the bearing seat 3, a groove 81 is arranged on the outer surface of the annular spacer 8, and an elastic element is arranged in the groove 81, the elastic element is in contact with the spacer 8 and the bearing seat 3 at the same time, the elastic element can prevent the annular spacer 8 from contacting the bearing seat 3, and at the same time, there is no slipping between the elastic element and the bearing seat 3, and there is no slipping between the elastic element and the annular spacer 8, so that a gap is formed between the annular spacer 8 and the bearing seat 3. When two bearing seats 3 installed on the same main shaft 1 are not coaxial, because there is a gap between the annular spacer 8 and the bearing seat 3, the annular spacer 8 will move together with the bearing 2 until the two bearings 2 are coaxial, thereby realizing the function of self-alignment.
[0027] In this embodiment, the annular spacer 8 is further provided with an oil inlet hole 82 and an oil return hole 83 at positions corresponding to the first oil supply branch 41, so as to ensure the realization of the self-aligning function and the cooling function for the inner ring of the bearing.
[0028] In practical applications, the elastic element is a rubber ring or a spiral spring ring welded at the head and tail.
[0029] The third embodiment Figure 3 As shown, a bearing chamber structure with cooling function comprises a main shaft 1, a bearing 2 mounted on the main shaft, a bearing seat 3 arranged around the bearing, a first cover plate 4 and a second cover plate 5 fixedly connected to the bearing seat 3, characterized in that: the main shaft 1 is further provided with a first rotor auxiliary member 6 and a second rotor auxiliary member 7 on both sides of the bearing 2, the first rotor auxiliary member 6 and the second rotor auxiliary member 7 are respectively abutted against the two side surfaces of the inner ring of the bearing, the bearing seat 3 is provided with an oil inlet passage 31 and an oil return passage 32, the first cover plate 4 and An oil slit 9 is provided between the bearings 2, and the oil slit 9 supplies cooling oil to the first rotor auxiliary part 6. The upper part of the oil slit 9 is connected to the oil inlet passage 31 on the bearing seat 3, and the lower part of the oil slit 9 is connected to the oil return passage 32 on the bearing seat 3. The second cover plate 5 is provided with a second oil supply branch 51 which is connected to the oil inlet passage 31 and can supply cooling oil to the second rotor auxiliary part 7. The upper end of the second oil supply branch 51 is connected to the oil inlet passage 31 on the bearing seat 3, and the lower end of the second oil supply branch 51 is connected to the oil return passage 32 on the bearing seat 3. In this embodiment, a compression spring 10 is also provided in the oil slit 9, and the compression spring 10 provides a preload force on the bearing 2 to ensure the preload force on the bearing 2 when a small axial movement occurs between the main shaft 1 and the bearing seat 3.
[0030] The cooling oil enters the oil slit 9 between the first cover plate 4 and the bearing 2 from the oil inlet passage 31 on the bearing seat 3, and flows to the first rotor auxiliary part 6. The first rotor auxiliary part 6 is in contact with the inner ring of the bearing 2, so that the heat of the inner ring of the bearing will be taken away by the cooling oil, and finally the cooling oil flows out from the return oil passage on the bearing seat 3. Similarly, another cooling oil enters the second oil supply branch 51 on the second cover plate 5 from the oil inlet passage 31 on the bearing seat 3, and flows to the second rotor auxiliary part 7. The second rotor auxiliary part 7 is in contact with the inner ring of the bearing 2, so that the heat of the inner ring of the bearing will be taken away by the cooling oil, and finally the cooling oil flows out from the return oil passage on the bearing seat, which can well cool the inner ring of the bearing and extend the service life of the bearing.
[0031] The fourth embodiment Figure 4 As shown, this embodiment is based on the third embodiment, and an annular spacer 8 is further arranged between the outer ring of the bearing 2 and the bearing seat 3. A groove 81 is arranged on the outer surface of the annular spacer 8, and an elastic element (not shown in the figure) is arranged in the groove 81. The elastic element is in contact with the annular spacer 8 and the bearing seat 3 at the same time. The elastic element can prevent the annular spacer 8 from contacting the bearing seat 3. At the same time, there is no slippage between the elastic element and the bearing seat 3, and there is no slippage between the elastic element and the annular spacer 8. In this way, a gap is formed between the annular spacer 8 and the bearing seat 3. When two bearing seats 3 installed on the same main shaft 1 are not coaxial, because there is a gap between the annular spacer 8 and the bearing seat 3, the annular spacer 8 will move together with the bearing 2 until the two bearings 2 are coaxial, thereby realizing the function of self-alignment.
[0032] In this embodiment, the annular spacer 8 is further provided with an oil inlet hole 82 and an oil return hole 83 at positions corresponding to the oil slit 9, so as to ensure the realization of the self-aligning function and the cooling function for the inner ring of the bearing.
[0033] In practical applications, the elastic element is a rubber ring or a spiral spring ring welded at the head and tail.
[0034] In practical applications, the bearing chamber structures are generally used in pairs on a main shaft, so the first embodiment and the third embodiment are usually used in pairs, and the second embodiment and the fourth embodiment are usually used in pairs, so Figure 1 and Figure 3 Towards the opposite direction, Figure 2 and Figure 4 Facing opposite direction.
[0035] The technical content and technical features of the present invention have been disclosed above, but it is understood that, under the spirit of the present invention, that is, the creative idea, those skilled in the art can make various changes and improvements to the above structure, including the combination of technical features disclosed or claimed separately here, and other combinations that obviously include these features. These variations and / or combinations all fall within the technical field involved in the present invention and fall within the protection scope of the claims of the present invention.
Claims
1. A bearing chamber structure with cooling function, comprising a main shaft, a bearing mounted on the main shaft, a bearing seat arranged around the bearing, a first cover plate and a second cover plate fixedly connected to the bearing seat, characterized in that: A first rotor auxiliary part and a second rotor auxiliary part are also arranged on both sides of the bearing on the main shaft, and the first rotor auxiliary part and the second rotor auxiliary part are respectively abutted against the two side surfaces of the inner ring of the bearing, and an oil inlet circuit and an oil return circuit are arranged on the bearing seat, and a first oil supply branch for supplying cooling oil to the first rotor auxiliary part is arranged on the first cover plate, the upper end of the first oil supply branch is connected to the oil inlet circuit on the bearing seat, and the lower end of the first oil supply branch is connected to the oil return circuit on the bearing seat; a second oil supply branch for supplying cooling oil to the second rotor auxiliary part is arranged on the second cover plate, the upper end of the second oil supply branch is connected to the oil inlet circuit on the bearing seat, and the lower end of the second oil supply branch is connected to the oil return circuit on the bearing seat.
2. The bearing chamber structure with cooling function according to claim 1, 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; the annular spacer is also respectively provided with an oil inlet through hole and an oil return through hole at the position corresponding to the first oil supply branch.
3. The bearing chamber structure with cooling function according to claim 2, characterized in that: The elastic element is a rubber ring or a spiral spring ring welded at the head and tail.
4. A bearing chamber structure with cooling function, comprising a main shaft, a bearing mounted on the main shaft, a bearing seat arranged around the bearing, a first cover plate and a second cover plate fixedly connected to the bearing seat, characterized in that: A first rotor auxiliary part and a second rotor auxiliary part are also arranged on both sides of the bearing on the main shaft, and the first rotor auxiliary part and the second rotor auxiliary part are respectively abutted against the two side surfaces of the inner ring of the bearing, and an oil inlet circuit and an oil return circuit are arranged on the bearing seat, and an oil passage slot is arranged between the first cover plate and the bearing, and the oil passage slot supplies cooling oil to the first rotor auxiliary part, and the upper part of the oil passage slot is connected to the oil inlet circuit on the bearing seat, and the lower part of the oil passage slot is connected to the oil return circuit on the bearing seat; a second oil supply branch circuit that is connected to the oil inlet circuit and can supply cooling oil to the second rotor auxiliary part is arranged on the second cover plate, and the upper end of the second oil supply branch circuit is connected to the oil inlet circuit on the bearing seat, and the lower end of the second oil supply branch circuit is connected to the oil return circuit on the bearing seat.
5. The bearing chamber structure with cooling function according to claim 4, 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; the annular spacer is also provided with an oil inlet hole and an oil return hole at the position corresponding to the oil slit.
6. The bearing chamber structure with cooling function according to claim 5, characterized in that: The elastic element is a rubber ring or a spiral spring ring welded at the head and tail.