Self-cooling radial bearing seat, self-cooling radial bearing structure and motor

Abstract

The present invention provides a self-cooling radial bearing seat, a self-cooling radial bearing structure, and a motor. The radial bearing seat includes a radial outer peripheral wall and a radial inner peripheral wall. An evaporation channel and a condensation reflux channel are provided inside the radial bearing seat between the radial outer peripheral wall and the radial inner peripheral wall. Condensate is provided inside the evaporation channel and the condensation reflux channel. The evaporation channel has an evaporation end, and the condensation reflux channel has a condensation end. A permeation structure is provided between the evaporation channel and the condensation reflux channel. The permeation structure can permeate gas evaporated from the evaporation channel into the condensation reflux channel, and can also permeate liquid condensed from the condensation reflux channel into the evaporation channel. According to the present invention, mixing between upward-flowing gas and downward-flowing liquid can be prevented, the flow circulation rate of gas and liquid can be increased, the flow amount and flow rate of gas upward and liquid downward can be increased, and the heat dissipation capacity or cooling capacity of the bearing seat can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and in particular to a self-cooling radial bearing seat, a self-cooling radial bearing structure and a motor. Background Art

[0002] The solution of CN 205937522 U in the prior art discloses an excellent bearing seat with heat dissipation effect, including a bearing seat, a base is provided at the lower end of the bearing seat, a bearing is installed inside the bearing seat, the outer ring of the bearing is bonded with a heat-conducting ring sheet, the outer wall of the heat-conducting ring sheet is installed with a heat pipe, the heat pipe includes an evaporation pipe section, the evaporation pipe section is arranged in a circular ring shape, the inner wall of the evaporation pipe section is bonded to the outer wall of the heat-conducting ring sheet, the top end of the evaporation pipe section is connected to an insulation pipe section, the upper end of the insulation pipe section passes through the bearing seat and extends to the top of the bearing seat, and the upper end of the insulation pipe section is connected to the evaporation pipe section. However, in this solution, the liquid at the bottom of the heat pipe rises due to heating and the gas at the top falls due to cooling, both of which flow in the evaporator section 4. This flow pattern will cause the evaporated gas to rise and the cooled liquid to fall to mix in the evaporator section. Such mixing will effectively prevent the liquid descending from above from falling to the bottom, that is, when it falls to a certain height in the evaporator section, it will be evaporated or carried upward by the upward-moving airflow. At the same time, it will also prevent the gas rising from below from rising to the top, that is, when the gas rises to a certain height in the evaporator section, it will be driven downward by the downward-moving liquid, thereby failing to fully improve the heat dissipation effect of the bottom part that needs heat dissipation or cooling, and failing to fully carry the heat to the top and be fully taken away, resulting in poor heat dissipation or cooling effect of the bearing seat.

[0003] Since the bearing seat with heat dissipation effect in the prior art cannot fully improve the heat dissipation effect of the parts that need heat dissipation or cooling, and cannot fully carry the heat to the top and be fully taken away, resulting in poor heat dissipation or cooling effect of the bearing seat, the present invention studies and designs a self-cooling radial bearing seat, a self-cooling radial bearing structure and a motor. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the bearing seat in the prior art that it cannot fully improve the heat dissipation effect of the parts that require heat dissipation or cooling, and cannot fully take away the heat, resulting in poor heat dissipation or cooling effect of the bearing seat, thereby providing a self-cooling radial bearing seat, a self-cooling radial bearing structure and a motor.

[0005] In order to solve the above problems, the present invention provides a self-cooling radial bearing seat, which includes:

[0006] A radial outer peripheral wall and a radial inner peripheral wall, an evaporation channel and a condensation reflux channel are further provided inside the radial bearing seat between the radial outer peripheral wall and the radial inner peripheral wall, condensate is provided inside the evaporation channel and the condensation reflux channel, the evaporation channel has an evaporation end so that the condensate can evaporate at the evaporation end, and the condensation reflux channel has a condensation end so that the gas can condense into liquid at the condensation end; and a permeation structure is further provided between the evaporation channel and the condensation reflux channel, the permeation structure can permeate the gas evaporated in the evaporation channel into the condensation reflux channel, and the permeation structure can also permeate the liquid condensed in the condensation reflux channel into the evaporation channel.

[0007] In some embodiments,

[0008] The condensate in the evaporation channel is a first condensate including a first solute and a first solvent, wherein the boiling point of the first solvent is lower than the boiling point of the first solute, and the liquid first solvent can evaporate into gas at the evaporation end and enter the condensation reflux channel through the permeation structure.

[0009] The condensate in the condensation reflux channel is a second condensate including a second solute and a second solvent, wherein the boiling point of the second solvent is lower than the boiling point of the second solute, and the gaseous second solvent can be condensed into a liquid at the condensation end and enter the evaporation channel through the permeation structure.

[0010] In some embodiments,

[0011] The first solute and the second solute are the same substance, and the first solvent and the second solvent are the same substance.

[0012] In some embodiments,

[0013] The permeation structure includes a permeation membrane. The permeation membrane is provided with through holes that only allow gas to pass through, so that the gas evaporated in the evaporation channel enters the condensation reflux channel through the through holes.

[0014] In some embodiments,

[0015] The permeation structure further includes a heat insulation layer arranged on the inner periphery and / or outer periphery of the permeation membrane.

[0016] In some embodiments,

[0017] The thermal insulation layer includes an outer ring thermal insulation layer located on the outer periphery of the permeable membrane and an inner ring thermal insulation layer located on the inner periphery of the permeable membrane. The permeable membrane is an annular structure, and the outer ring thermal insulation layer and the inner ring thermal insulation layer are also annular structures.

[0018] The evaporation channel is an annular channel located on the inner periphery of the permeation structure, and the condensation reflux channel is an annular channel located on the outer periphery of the permeation structure.

[0019] In some embodiments,

[0020] The radial bearing seat is also provided with ventilation cooling holes extending axially therethrough. The ventilation cooling holes are located on the periphery of the condensation reflux channel and are arranged opposite to the through holes on the permeable membrane. Gas for cooling can be introduced into the ventilation cooling holes.

[0021] In some embodiments,

[0022] The central axis of the radial bearing seat is arranged in the horizontal direction. In the projection surface of the vertical plane, the radial bearing seat has a horizontal line passing through its center, and the evaporation end is a channel section located in the evaporation channel and below the horizontal line, and the condensation end is a channel section located in the condensation reflux channel and opposite to the ventilation cooling hole; the liquid condensed in the condensation reflux channel penetrates into the evaporation channel through the bottom position of the permeable membrane.

[0023] In some embodiments,

[0024] The ventilation cooling hole is opened at the top of the radial bearing seat, and the through hole is also located at the top of the permeable membrane; or,

[0025] There are a plurality of ventilation cooling holes, which are spaced apart along the circumference of the radial bearing seat. There are also a plurality of through holes, which are spaced apart along the circumference of the permeable membrane.

[0026] In some embodiments,

[0027] When the ventilation cooling hole is opened at the top of the radial bearing seat and the through hole is also located at the top of the permeable membrane, the ventilation cooling hole is a plurality of holes distributed at intervals, and the through hole is also a plurality of holes distributed at intervals;

[0028] When there are multiple ventilation cooling holes and they are spaced apart along the circumference of the radial bearing seat, and there are multiple through holes and they are spaced apart along the circumference of the permeable membrane, the multiple ventilation cooling holes are all located above the horizontal line, and the multiple through holes are also all located above the horizontal line.

[0029] In some embodiments,

[0030] Both axial end faces of the radial bearing seat are provided with sealing structures for sealing the evaporation channel and the condensation reflux channel respectively, so that the condensate can be sealed inside the evaporation channel and the condensation reflux channel.

[0031] The present invention also provides a self-cooling radial bearing structure, which includes the aforementioned self-cooling radial bearing seat,

[0032] It also includes a radial bearing and an end cover. The inner side of the radial inner circumferential wall of the radial bearing seat is formed as a hollow channel. The radial bearing is a gas bearing. The radial bearing is arranged in the hollow channel. The end cover is arranged on the outer periphery of the radial bearing seat, and an air intake channel is also provided on the end cover. The air intake channel can be connected to the ventilation cooling hole and the radial bearing respectively to supply air.

[0033] In some embodiments,

[0034] The air intake channel includes a first air intake channel and a second air intake channel. The first air intake channel includes a first axial channel opened from one axial side of the end cover and a radial channel opened along the radial direction. The first axial channel, the radial channel and the ventilation cooling hole are connected in sequence. The second air intake channel is opened from the other axial side of the end cover and extends to connect with the radial bearing. The radial bearing includes a radial bearing arch foil and a radial bearing top foil. The second air intake channel can be connected with the inner circumference of the radial bearing arch foil. The second air intake channel can also be connected with the space between the radial bearing arch foil and the radial bearing top foil.

[0035] The present invention also provides a motor, which includes the aforementioned self-cooling radial bearing structure and a shell, wherein a third air inlet channel is provided on the shell to communicate with the air inlet channel on the end cover to provide gas, and an exhaust channel is also provided on the shell to discharge the gas in the shell after cooling and support.

[0036] The self-cooling radial bearing seat, self-cooling radial bearing structure and motor provided by the present invention have the following beneficial effects:

[0037] 1. The present invention provides an evaporation channel and a condensation reflux channel between the inner and outer peripheral walls of the radial bearing seat, and provides condensate inside the evaporation channel and the condensation reflux channel. The evaporation channel has an evaporation end, and the condensation reflux channel has a condensation end. The condensate is heated at the evaporation end to form gas and move upward, and is condensed into liquid at the condensation end. Furthermore, a permeation structure is provided between the evaporation channel and the condensation reflux channel, so that the gas formed in the evaporation channel can be permeated into the condensation reflux channel, and the liquid formed in the condensation reflux channel can be permeated into the evaporation channel, so that the gas flows from the evaporation end to the condensation end in the evaporation channel, and the liquid flows from the condensation end to the evaporation end in the condensation reflux channel. The air in the evaporator moves along the cooling channel, forming a circulating flow, which continuously and effectively takes away the heat generated by the inner periphery, and has an excellent cooling effect. The gas flow channel and the liquid flow channel are effectively separated to form two independent channels for flow respectively, which can prevent the upward-flowing gas and the downward-flowing liquid from mixing, thereby improving the flow circulation rate of the gas and liquid, and further making the liquid descending from the top fall to the bottom, and transfer the coldness of the condensation end to the evaporation end, and making the gas rising from the bottom rise to the top, and transfer the heat of the evaporation end to the condensation end and be taken away, thereby greatly improving the cooling and heat exchange capacity, improving the heat dissipation effect of the bottom or bearings and other parts that require heat dissipation and cooling, and improving the heat dissipation capacity or cooling capacity of the bearing seat.

[0038] 2. The present invention further enhances the adsorption and penetration capacity of the gas in the evaporation channel through the permeation structure provided between the evaporation channel and the condensation reflux channel, drives the gas to continuously pass through the permeation structure into the condensation reflux channel, and enhances the adsorption and penetration capacity of the liquid in the condensation reflux channel, drives the liquid to continuously pass through the permeation structure into the evaporation channel, increases the flow volume and flow rate of the gas upward and the liquid downward, further improves the heat dissipation effect of the bottom or bearings and other parts that require heat dissipation and cooling, and further improves the heat dissipation capacity or cooling capacity of the bearing seat; and through the annular structure of the evaporation channel, the condensation reflux channel and the permeation structure of the annular structure, the channel length of the fluid movement circulation can be maximized, which can further improve the flow circulation rate of the liquid and gas respectively, and further improve the heat dissipation capacity or cooling capacity of the bearing seat.

[0039] 3. The present invention also plays an effective role in heat insulation and heat preservation between the evaporation channel and the condensation reflux channel through the heat insulation layer arranged on the inner and outer periphery of the permeable membrane, preventing the heat in the evaporation channel from directly affecting the condensation reflux channel, causing the gas in the condensation reflux channel to be unable to condense into liquid, ensuring that the heat is dissipated around the ventilation cooling holes, so that the condensate in the evaporation channel and the condensation reflux channel inside the bearing seat can maintain continuous and effective circulation operation; the present invention also effectively seals the condensate in the evaporation channel and the condensation reflux channel through the sealing structure arranged on the axial end faces of the bearing seat, ensuring that the condensate in the evaporation channel and the condensation reflux channel inside the bearing seat can maintain continuous and effective circulation operation, and continuously and effectively maintain cooling and heat dissipation of the rotating shaft.

[0040] 4. The present invention also uses the channel opened at the end cover provided on the outer periphery of the bearing seat (or even the channel opened on the motor housing) to simultaneously provide cooling gas to the ventilation cooling holes on the bearing seat and provide gas for support and cooling to the gas bearing, which can cool the shaft, bearing (arch foil and top foil, etc.) and bearing seat, improve the supporting effect of the bearing, and maximize the heat dissipation and cooling effects of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a front cross-sectional view of a motor with a self-cooling bearing structure according to the present invention;

[0042] Figure 2 yes Figure 1 Exploded structural diagram of the self-cooling bearing structure;

[0043] Figure 3 This is an axial cross-sectional structural diagram of the self-cooling radial bearing seat of the present invention (main embodiment);

[0044] Figure 4 is a front cross-sectional view of the self-cooling bearing structure of the present invention;

[0045] Figure 5 yes Figure 4 A partial enlarged view of part A;

[0046] Figure 6 1 is an axial cross-sectional structural diagram of a self-cooling radial bearing seat according to the present invention (alternative embodiment).

[0047] The reference numerals indicate:

[0048] 1. Radial outer peripheral wall; 2. Radial inner peripheral wall; 3. Radial bearing seat; 4. Evaporation channel; 5. Condensation reflux channel; 6. Permeation structure; 601. Inner ring insulation layer; 602. Permeable membrane; 603. Outer ring insulation layer; 7. Condensate; 701. First condensate; 702. Second condensate; 8. Evaporation end; 9. Condensation end; 10. Ventilation cooling hole; 11. Radial bearing (front radial bearing); 12. End cover (first-stage end cover); 13. Hollow channel; 14. First air inlet channel; 15. Second air inlet channel; 16. Radial bearing arch foil; 17. Radial bearing top foil; 18. Housing; 19. Third air inlet channel; 20. Exhaust channel

[0049] 21. First-stage diffuser; 22. Stator; 23. Second-stage end cover; 24. Second-stage diffuser; 25. Axial bearing; 26. Rear radial bearing; 27. Rotating shaft; 28. Axial bearing seat; 29. ​​Through hole. DETAILED DESCRIPTION

[0050] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0053] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0056] like Figure 1-6As shown, the present invention provides a self-cooling radial bearing seat, which includes:

[0057] A radial outer peripheral wall 1 and a radial inner peripheral wall 2, an evaporation channel 4 and a condensation reflux channel 5 are further provided inside the radial bearing seat 3 between the radial outer peripheral wall 1 and the radial inner peripheral wall 2, and condensate 7 is provided inside the evaporation channel 4 and the condensation reflux channel 5. The evaporation channel 4 has an evaporation end 8, so that the condensate 7 can evaporate at the evaporation end 8, and the condensation reflux channel 5 has a condensation end 9, so that the gas can condense into liquid at the condensation end 9; and a permeation structure 6 is also provided between the evaporation channel 4 and the condensation reflux channel 5, the permeation structure 6 can penetrate the gas evaporated in the evaporation channel 4 into the condensation reflux channel 5, and the permeation structure 6 can also penetrate the liquid condensed in the condensation reflux channel 5 into the evaporation channel 4.

[0058] The present invention arranges an evaporation channel and a condensation reflux channel between the inner and outer peripheral walls of the radial bearing seat, and arranges condensate inside the evaporation channel and the condensation reflux channel. The evaporation channel has an evaporation end, and the condensation reflux channel has a condensation end. The condensate is heated at the evaporation end to form gas and move upward, and is condensed into liquid at the condensation end. Furthermore, by arranging a permeation structure between the evaporation channel and the condensation reflux channel, the gas formed in the evaporation channel can be permeated into the condensation reflux channel, and the liquid formed in the condensation reflux channel can be permeated into the evaporation channel, so that the gas flows from the evaporation end to the condensation end in the evaporation channel, and the liquid flows from the condensation end to the evaporation end in the condensation reflux channel. , forming a circulating flow, continuously and effectively taking away the heat generated in the inner periphery, with excellent cooling effect; and effectively separating the gas flow channel and the liquid flow channel, forming two independent channels for flow respectively, which can prevent the upward-flowing gas and the downward-flowing liquid from mixing, and improve the flow circulation rate of gas and liquid, and further enable the descending liquid from the top to descend to the bottom, and transfer the coldness of the condensation end to the evaporation end, and also enable the rising gas from the bottom to rise to the top, and transfer the heat of the evaporation end to the condensation end and be taken away, thereby greatly improving the cooling and heat exchange capacity, improving the heat dissipation effect of the bottom or bearings and other parts that require heat dissipation and cooling, and improving the heat dissipation capacity or cooling capacity of the bearing seat.

[0059] The present invention further enhances the adsorption and penetration capacity of the gas in the evaporation channel through the permeation structure provided between the evaporation channel and the condensation reflux channel, driving the gas to continuously pass through the permeation structure into the condensation reflux channel, and enhances the adsorption and penetration capacity of the liquid in the condensation reflux channel, driving the liquid to continuously pass through the permeation structure into the evaporation channel, thereby increasing the flow volume and flow rate of the gas upward and the liquid downward, further improving the heat dissipation effect of the bottom or bearings and other parts that require heat dissipation and cooling, and further improving the heat dissipation capacity or cooling capacity of the bearing seat.

[0060] The present invention designs a new bearing structure based on the penetration principle, applies the penetration principle in new scenarios, and applies the penetration principle to bearing thermal management, thereby improving the heat dissipation efficiency of the bearing, reducing the operating temperature of the bearing, solving the problem of difficult heat dissipation of the bearing, and increasing the air viscosity of the air around the bearing. The gas dynamic pressure effect is obvious, thereby improving the load-bearing capacity of the gas bearing; at the same time, reducing the bearing temperature can effectively improve the stability of the bearing operation.

[0061] In some embodiments,

[0062] The condensate in the evaporation channel 4 is a first condensate 701 including a first solute and a first solvent, wherein the boiling point of the first solvent is lower than that of the first solute, and the liquid first solvent can evaporate into gas at the evaporation end 8 and enter the condensation reflux channel 5 through the permeation structure 6.

[0063] The condensate in the condensation reflux channel 5 is a second condensate 702 including a second solute and a second solvent, wherein the boiling point of the second solvent is lower than the boiling point of the second solute, and the gaseous second solvent can be condensed into a liquid at the condensation end 9 and enter the evaporation channel 4 through the permeation structure 6.

[0064] This is the preferred structural form of the condensate of the present invention. In the form of solute + solvent, and the boiling point of the solvent is lower than that of the solute, the solvent is first evaporated into gas when heated at the evaporation end, and then enters the condensation reflux channel through the permeation structure and condenses into liquid when cooled at the condensation end. Finally, the solvent enters the evaporation channel through the permeation structure again, completing the fluid circulation flow of the heat pipe principle, thereby continuously taking away the heat generated by the rotating shaft and bearings on the inner periphery of the bearing seat, achieving continuous and effective cooling and temperature reduction, and improving the heat dissipation capacity.

[0065] In some embodiments,

[0066] The first solute and the second solute are the same substance, and the first solvent and the second solvent are the same substance. In the present invention, the condensate in the evaporation channel and the condensation heat exchange channel is preferably the same condensate, that is, the first solute and the second solute are the same substance, and the first solvent and the second solvent are the same solvent, so that the condensate continuously flows between the evaporation channel and the condensation heat exchange channel, continuously and effectively cooling the heat generated by the bearing and the rotating shaft.

[0067] In some embodiments,

[0068] The permeation structure 6 includes a permeable membrane 602 . The permeable membrane 602 is provided with through holes 29 that only allow gas to pass through, so that the gas evaporated in the evaporation channel 4 enters the condensation reflux channel 5 through the through holes 29 .

[0069] The permeation structure of the present invention preferably includes a permeation membrane structure, which can allow the solvent to automatically enter from one side to the other side according to the concentration difference between the two sides of the membrane. The through holes opened on the permeation membrane can allow gas to pass through but not liquid, so that the gas formed by heat in the evaporation channel enters the condensation reflux channel through the through holes.

[0070] When the bearing system of the present invention is not yet in operation, the temperature inside the bearing seat is consistent, and the first condensate 701 and the second condensate 702 are in a pressure equilibrium state (the first condensate and the second condensate are the same substance but with different concentrations), and there is no internal flow between the two condensates. The condensate is a mixture composed of a solvent that is easily volatile when heated and a solute that is miscible with it (the boiling point of the solute is higher than that of the solvent, the solvent evaporates first, and the amount of solute in the inner and outer rings is constant, and its function is to regulate the flow direction of the solvent, and the solvent circulates inside). When the bearing system is in operation, the condensation end absorbs heat, and the first condensate 701 evaporates when heated and moves upward through the evaporation channel 4. At this time, the solution of the first condensate 701 decreases, the concentration increases, and the liquid level decreases. The gas enters the condensation reflux channel 5 through the permeation structure 6. The permeation layer is composed of two layers of thermal insulation material and a layer of permeable membrane. An air flow channel is opened above the thermal insulation layer to allow the condensate to pass through. The thermal insulation material of the thermal insulation layer has the effect of causing a temperature difference between the two condensates when the bearing is in operation. The temperature difference is more conducive to the flow of the condensate in the two channels. The gas is cooled and liquefied at the condensation end 9, flowing back through the condensation reflux channel 5 to its bottom. The second condensate 702 increases in volume, its concentration decreases, and the liquid level rises. At this point, the concentration of the outer ring second condensate is lower than that of the inner ring first condensate. Under the combined effects of osmotic pressure and the pressure difference between the liquid levels, the second condensate flows through the permeable structure 6 toward the first condensate 701, completing the liquid circulation within the bearing seat. Heat from the bearing system is transferred from the inner ring to the outer ring, completing the heat transfer and dissipation.

[0071] In some embodiments,

[0072] The permeable structure 6 also includes a thermal insulation layer disposed on the inner and / or outer periphery of the permeable membrane 602. The present invention also utilizes the thermal insulation layer disposed on the inner and outer peripheries of the permeable membrane to effectively insulate the evaporation channel and the condensation return channel, preventing heat in the evaporation channel from directly affecting the condensation return channel and preventing the gas in the condensation return channel from condensing into liquid. This ensures that heat is dissipated around the ventilation and cooling holes, allowing the condensate in the evaporation channel and the condensation return channel within the bearing seat to continue to circulate effectively.

[0073] In some embodiments,

[0074] The thermal insulation layer includes an outer ring thermal insulation layer 603 located on the outer periphery of the permeable membrane 602 and an inner ring thermal insulation layer 601 located on the inner periphery of the permeable membrane 602. The permeable membrane 602 is an annular structure, and the outer ring thermal insulation layer 603 and the inner ring thermal insulation layer 601 are also annular structures.

[0075] The evaporation channel 4 is an annular channel located at the inner periphery of the permeation structure 6 , and the condensation reflux channel 5 is an annular channel located at the outer periphery of the permeation structure 6 .

[0076] This is the preferred structural form of the thermal insulation layer of the present invention. Through the annular evaporation channel, condensation reflux channel and annular permeation structure, the channel length of the fluid movement circulation can be maximized, the flow circulation rate of the liquid and gas can be further improved, and the heat dissipation or cooling capacity of the bearing seat can be further improved.

[0077] In some embodiments,

[0078] The radial bearing seat 3 is also provided with a ventilation cooling hole 10 extending axially therethrough. The ventilation cooling hole 10 is located on the periphery of the condensation reflux channel 5 , and the ventilation cooling hole 10 is arranged opposite to the through hole 29 on the permeable membrane 602 . Gas for cooling can be introduced into the ventilation cooling hole 10 .

[0079] The present invention also allows cooling gas to pass through the ventilation cooling holes opened on the radial bearing seat at the periphery of the condensation reflux channel, thereby effectively taking away the heat of the gas evaporated in the evaporation channel at the condensation end. The cooling gas absorbs the heat released by the gas at the condensation end. The gas at the condensation end is cooled after heat exchange with the cooling gas and becomes liquid, and then moves to the lower end of the condensation reflux channel under the action of gravity, enters the evaporation channel through the infiltration structure, completing the circulation of the fluid, and the gas movement and liquid movement are carried out in different channels to avoid mixing, thereby improving their respective movement paths and circulation flow rates, and maximizing the heat dissipation and cooling capabilities of the radial bearing seat. The heat of the radial bearing seat usually comes from the friction of the radial bearing, thereby being able to cool the radial bearing and the rotating shaft.

[0080] In some embodiments,

[0081] The central axis of the radial bearing seat 3 is arranged in the horizontal direction. In the projection surface of the vertical plane, the radial bearing seat 3 has a horizontal line passing through its center, and the evaporation end 8 is a channel section located in the evaporation channel 4 and below the horizontal line, and the condensation end 9 is a channel section located in the condensation reflux channel 5 and opposite to the ventilation cooling hole 10; the liquid condensed in the condensation reflux channel 5 penetrates into the evaporation channel 4 through the bottom position of the permeable membrane 602.

[0082] This is a further preferred structural form of the radial bearing seat of the present invention, that is, a radial bearing seat arranged vertically up and down, and the evaporation end is a channel section located below the horizontal line. Due to the gravity of the condensed liquid, the liquid accumulates in the lower position of the evaporation channel, and evaporates into gas due to heat and flows upward to the through hole of the permeable membrane and enters the condensation reflux channel. The through hole is preferably opposite to the ventilation cooling hole, so that the cold gas in the ventilation cooling hole can cool and exchange heat with the condensed liquid gas entering the condensation reflux channel through the through hole, thereby improving the heat exchange capacity, and the bottom end of the condensation reflux channel penetrates into the evaporation channel through the permeable membrane, replenishing the condensed liquid into the evaporation channel, making it circulate and continuously cool the bearings and the rotating shaft.

[0083] The thermal insulation layer of the present invention preferably has through holes at a position opposite to the through holes and at a position opposite to the bottom of the permeable membrane to ensure that the gas can smoothly enter the condensation reflux channel from the evaporation channel, and ensure that the liquid can smoothly penetrate from the condensation reflux channel through the permeable membrane into the evaporation channel.

[0084] In some embodiments,

[0085] The ventilation cooling hole 10 is opened at the top of the radial bearing seat 3, and the through hole 29 is also located at the top of the permeable membrane 602; or,

[0086] There are multiple ventilation cooling holes 10 and they are spaced apart along the circumference of the radial bearing seat 3 . There are also multiple through holes 29 and they are spaced apart along the circumference of the permeable membrane 602 .

[0087] The main embodiment of the present invention has a structure in which the ventilation cooling hole is opened at the top of the radial bearing seat, such as Figure 1 The through hole is also located at the top of the permeable membrane. The structural form of an alternative embodiment of the present invention is that there are multiple ventilation cooling holes and they are spaced apart along the circumference of the radial bearing seat. There are also multiple through holes and they are spaced apart along the circumference of the permeable membrane. Both methods can effectively condense the gas in the condensation reflux channel into liquid through the ventilation cooling holes, smoothly take away the heat generated by the bearing, and improve the cooling and heat exchange capacity.

[0088] In some embodiments,

[0089] When the ventilation cooling hole 10 is opened at the top of the radial bearing seat 3 and the through hole 29 is also located at the top of the permeable membrane 602, the ventilation cooling hole 10 is a plurality of holes distributed at intervals, and the through holes 29 are also a plurality of holes distributed at intervals;

[0090] When there are multiple ventilation cooling holes 10 and they are opened at intervals along the circumference of the radial bearing seat, and there are multiple through holes 29 and they are opened at intervals along the circumference of the permeable membrane 602, the multiple ventilation cooling holes 10 are all located above the horizontal line, and the multiple through holes 29 are also all located above the horizontal line.

[0091] This is a further preferred structural form of the two different modes of the main embodiment and the alternative embodiment of the present invention, that is, the ventilation cooling holes located at the top of the main embodiment are a plurality of spaced-apart structures, while the ventilation cooling holes of the alternative embodiment are located above the horizontal line. This can effectively avoid the situation where the ventilation cooling holes are located below the liquid in the condensation reflux channel and cannot cool the gas, and ensure that the ventilation cooling holes are opposite to the gas in the condensation reflux channel to improve the cooling effect on the gas.

[0092] In some embodiments,

[0093] Both axial end faces of the radial bearing seat 3 are provided with sealing structures (not shown) for sealing the evaporation channel 4 and the condensation reflux channel 5 respectively, so that the condensate 7 can be sealed inside the evaporation channel 4 and the condensation reflux channel 5.

[0094] This is a further preferred structural form of the present invention, which provides sealing structures for sealing the evaporation channel and the condensation reflux channel at both axial ends of the radial bearing seat, so as to effectively seal the fluid inside the evaporation channel and the condensation reflux channel. During the manufacturing process, the evaporation channel and the condensation reflux channel can be first opened through the axial direction, and then one end can be blocked, and the condensate can be passed into the evaporation channel and the condensation reflux channel at the other end, and then the other end can be blocked; or the evaporation channel and the condensation reflux channel can be first opened from one axial end face but not through the other axial end face, and then the condensate can be passed into the evaporation channel and the condensation reflux channel from the open end, and then the open end can be blocked, so as to effectively seal the condensate inside the evaporation channel and the condensation reflux channel to prevent the fluid from flowing out during operation and causing the heat exchange to fail.

[0095] The present invention also provides a self-cooling radial bearing structure, which includes the aforementioned self-cooling radial bearing seat,

[0096] It also includes a radial bearing 11 and an end cover 12. The inner side of the radial inner circumferential wall 2 of the radial bearing seat 3 is formed as a hollow channel 13. The radial bearing 11 is a gas bearing. The radial bearing 11 is arranged in the hollow channel 13. The end cover 12 is arranged on the outer periphery of the radial bearing seat 3, and an air intake channel is also provided on the end cover 12. The air intake channel can be connected to the ventilation cooling hole 10 and the radial bearing 11 respectively to supply air.

[0097] The present invention also provides cooling gas to the ventilation cooling holes on the bearing seat and gas for supporting and cooling the gas bearings through the channels opened at the end covers arranged on the outer periphery of the bearing seat (or even the channels opened on the motor housing). It can cool the shaft, bearings (arch foil and top foil, etc.) and the bearing seat, improve the supporting effect of the bearing, and maximize the heat dissipation and cooling effects of the bearing.

[0098] The present invention provides a new bearing structure that solves the problem of bearing heat dissipation difficulties, can improve the heat exchange efficiency between the bearing and the outside world, reduce the operating temperature of the bearing, increase the air viscosity of the air around the bearing, and significantly increase the gas dynamic pressure effect, thereby improving the load-bearing capacity of the gas bearing; at the same time, reducing the bearing temperature can effectively improve the stable performance of the bearing operation.

[0099] In some embodiments,

[0100] The air inlet passage includes a first air inlet passage 14 and a second air inlet passage 15. The first air inlet passage can be communicated with the ventilation cooling hole to provide cooling gas to the ventilation cooling hole, and the second air inlet passage can be communicated with the radial bearing to provide gas for supporting and cooling the radial bearing.

[0101] The first air inlet channel 14 includes a first axial channel opened from one axial side of the end cover 12 and a radial channel opened along the radial direction. The first axial channel, the radial channel and the ventilation cooling hole 10 are connected in sequence. The second air inlet channel 15 is opened from the other axial side of the end cover 12 and extends to be connected with the radial bearing 11. The radial bearing 11 includes a radial bearing arch foil 16 and a radial bearing top foil 17. The second air inlet channel 15 can be connected with the inner periphery of the radial bearing arch foil 16. The second air inlet channel 15 can also be connected with the space between the radial bearing arch foil 16 and the radial bearing top foil 17.

[0102] This is a further preferred structural form of the first air inlet channel and the second air inlet channel of the present invention, that is, the first air inlet channel takes in air from one axial end of the end cover, and is mainly used to connect to the ventilation cooling hole of the radial bearing seat, providing cooling gas to the condensation end of the bearing seat, and the second air inlet channel is opened from the other axial end, and is mainly used to connect to the radial bearing arch foil and the radial bearing top foil, thereby cooling the inside of the bearing and the rotating shaft. The second air inlet channel can also let gas into the ventilation cooling hole, thereby enhancing the air supply at the condensation end and improving the cooling effect.

[0103] The present invention proposes a novel gas dynamic pressure radial bearing structure and its motor, which are used to solve the heat dissipation problem of air bearings. The specific structure of the motor of the present invention is as follows: Figure 1 As shown, the first-stage diffuser 21, the first-stage end cover (end cover 12), the casing (housing 18), the stator 22, the second-stage end cover 23, the second-stage diffuser 24, the axial bearing 25, the front radial bearing (radial bearing 11), the rear radial bearing 26, and the rotating shaft 27. The radial bearing part is shown in FIG. Figure 2 As shown, the radial bearing arch foil 16, the radial bearing seat 3, the radial bearing top foil 17, and the axial bearing seat 28.

[0104] The present invention also provides a motor, which includes the aforementioned self-cooling radial bearing structure and a shell 18. The shell 18 is provided with a third air inlet channel 19 to communicate with the air inlet channel on the end cover 12 to provide gas. The shell 18 is also provided with an exhaust channel 20 to discharge the gas in the shell 18 after cooling and support.

[0105] The motor of the present invention can provide gas for cooling and supporting the radial bearing structure through the third air inlet channel opened on the shell, and can effectively discharge the cooled and supported gas through the exhaust channel opened on the shell, thereby ensuring the continuous introduction of gas and improving the flow circulation rate of the airflow, thereby improving the cooling and supporting effects of the radial bearing part and the stator, axial bearing and other parts.

[0106] like Figure 1 The cooling air of the motor enters the housing from the cooling inlet and is divided from both ends. One end flows through the first-stage end cover (end cover 12) into the axial bearing chamber and then flows through the front radial bearing (radial bearing 11), or directly flows from the end cover through the front radial bearing and directly into the motor cavity. After entering the motor cavity, it cools the stator and is discharged from the gas outlet. The other end passes through the second-stage end cover 23 to cool the radial bearing 26 and the rotating shaft 27, and then flows into the motor cavity to cool the stator and is discharged from the gas outlet. The specific route of the cooling air flowing through the front radial bearing is shown in FIG. Figure 4 As shown, the cooling air flowing in from the left end and the cooling air flowing in from the upper end converge in the cavity at the left end of the bearing and then pass through the air gap between the bearing and the rotating shaft and the ventilation cooling hole 10 on the bearing seat respectively. The cooling air passing through the air gap cools the bearing while providing a load-bearing carrier for the bearing, and the cooling air passing through the bearing seat takes away the heat in the bearing seat, forming a temperature difference between the heat absorption end and the condensation end.

[0107] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A self-cooling radial bearing seat, characterized in that: include: A radial outer peripheral wall (1) and a radial inner peripheral wall (2); an evaporation channel (4) and a condensation reflux channel (5) are further provided inside the radial bearing seat (3) between the radial outer peripheral wall (1) and the radial inner peripheral wall (2); condensate (7) is provided inside the evaporation channel (4) and the condensation reflux channel (5); the evaporation channel (4) has an evaporation end (8) so that the condensate (7) can evaporate at the evaporation end (8); the condensation reflux channel (5) has a condensation end (9) so that the gas can condense into liquid at the condensation end (9); and a permeation structure (6) is further provided between the evaporation channel (4) and the condensation reflux channel (5); the permeation structure (6) can permeate the gas evaporated in the evaporation channel (4) into the condensation reflux channel (5); and the permeation structure (6) can also permeate the liquid condensed in the condensation reflux channel (5) into the evaporation channel (4); The permeation structure (6) comprises a permeation membrane (602), and a through hole (29) is provided on the permeation membrane (602) that only allows gas to pass through, so that the gas evaporated in the evaporation channel (4) enters the condensation reflux channel (5) through the through hole (29); the permeation membrane (602) is an annular structure.

2. The self-cooling radial bearing seat according to claim 1, characterized in that: The condensate in the evaporation channel (4) is a first condensate (701) comprising a first solute and a first solvent, wherein the boiling point of the first solvent is lower than the boiling point of the first solute, and the liquid first solvent can evaporate into gas at the evaporation end (8) and enter the condensation reflux channel (5) through the permeation structure (6). The condensate in the condensation reflux channel (5) is a second condensate (702) comprising a second solute and a second solvent, wherein the boiling point of the second solvent is lower than the boiling point of the second solute, and the gaseous second solvent can be condensed into a liquid at the condensation end (9) and enter the evaporation channel (4) through the permeation structure (6).

3. The self-cooling radial bearing seat according to claim 2, characterized in that: The first solute and the second solute are the same substance, and the first solvent and the second solvent are the same substance.

4. The self-cooling radial bearing seat according to claim 1, characterized in that: The permeable structure (6) further includes a heat insulation layer arranged on the inner periphery and / or outer periphery of the permeable membrane (602).

5. The self-cooling radial bearing seat according to claim 4, characterized in that: The heat insulation layer comprises an outer ring heat insulation layer (603) located on the outer periphery of the permeable membrane (602), and an inner ring heat insulation layer (601) located on the inner periphery of the permeable membrane (602), and both the outer ring heat insulation layer (603) and the inner ring heat insulation layer (601) are also annular structures; The evaporation channel (4) is an annular channel located on the inner periphery of the permeation structure (6), and the condensation reflux channel (5) is an annular channel located on the outer periphery of the permeation structure (6).

6. The self-cooling radial bearing seat according to claim 1, characterized in that: The radial bearing seat (3) is also provided with a ventilation cooling hole (10) extending axially therethrough. The ventilation cooling hole (10) is located on the periphery of the condensation reflux channel (5), and the ventilation cooling hole (10) is arranged opposite to the through hole (29) on the permeable membrane (602). Gas for cooling can be introduced into the ventilation cooling hole (10).

7. The self-cooling radial bearing seat according to claim 6, characterized in that: The central axis of the radial bearing seat (3) is arranged in the horizontal direction. In the projection surface of the vertical plane, the radial bearing seat (3) has a horizontal line passing through its center, and the evaporation end (8) is a channel section located in the evaporation channel (4) and below the horizontal line. The condensation end (9) is a channel section located in the condensation return channel (5) and opposite to the ventilation cooling hole (10); the liquid condensed in the condensation return channel (5) penetrates into the evaporation channel (4) through the bottom position of the permeable membrane (602).

8. The self-cooling radial bearing seat according to claim 7, characterized in that: The ventilation cooling hole (10) is opened at the top end of the radial bearing seat (3), and the through hole (29) is also located at the top end of the permeable membrane (602); or, The ventilation cooling holes (10) are multiple and are opened at intervals along the circumference of the radial bearing seat (3), and the through holes (29) are also multiple and are opened at intervals along the circumference of the permeable membrane (602).

9. The self-cooling radial bearing seat according to claim 8, characterized in that: When the ventilation cooling hole (10) is opened at the top end of the radial bearing seat (3), and the through hole (29) is also located at the top end of the permeable membrane (602), the ventilation cooling hole (10) is a plurality of holes distributed at intervals, and the through hole (29) is also a plurality of holes distributed at intervals; When the ventilation cooling holes (10) are multiple and are opened at intervals along the circumference of the radial bearing seat, and the through holes (29) are also multiple and are opened at intervals along the circumference of the permeable membrane (602), the multiple ventilation cooling holes (10) are all located above the horizontal line, and the multiple through holes (29) are also all located above the horizontal line.

10. The self-cooling radial bearing seat according to any one of claims 1 to 9, characterized in that: Both axial end faces of the radial bearing seat (3) are provided with sealing structures for respectively sealing the evaporation channel (4) and the condensation reflux channel (5), so that the condensate (7) can be sealed inside the evaporation channel (4) and the condensation reflux channel (5).

11. A self-cooling radial bearing structure, characterized in that: A self-cooling radial bearing seat comprising any one of claims 6 to 9, The invention also includes a radial bearing (11) and an end cover (12), wherein the inner side of the radial inner peripheral wall (2) of the radial bearing seat (3) is formed as a hollow channel (13), the radial bearing (11) is a gas bearing, the radial bearing (11) is arranged in the hollow channel (13), the end cover (12) is arranged on the outer periphery of the radial bearing seat (3), and an air intake channel is also provided on the end cover (12), and the air intake channel can be respectively connected to the ventilation cooling hole (10) and the radial bearing (11) to supply air.

12. The self-cooling radial bearing structure according to claim 11, characterized in that: The air intake passage comprises a first air intake passage (14) and a second air intake passage (15), The first air inlet passage (14) includes a first axial passage opened from one axial side of the end cover (12) and a radial passage opened along a radial direction, the first axial passage, the radial passage and the ventilation cooling hole (10) are connected in sequence, the second air inlet passage (15) is opened from the other axial side of the end cover (12) and extends to be connected with the radial bearing (11), the radial bearing (11) includes a radial bearing arch foil (16) and a radial bearing top foil (17), the second air inlet passage (15) can be connected with the inner periphery of the radial bearing arch foil (16), and the second air inlet passage (15) can also be connected with the space between the radial bearing arch foil (16) and the radial bearing top foil (17).

13. A motor, characterized in that: The self-cooling radial bearing structure comprises the self-cooling radial bearing structure according to any one of claims 11 to 12, and further comprises a shell (18), wherein a third air inlet passage (19) is provided on the shell (18) to communicate with the air inlet passage on the end cover (12) to provide gas, and an exhaust passage (20) is also provided on the shell (18) to discharge the gas in the shell (18) after cooling and supporting.

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