Axial bearing structure and motor

Abstract

The present invention provides an axial bearing structure and a motor. The axial bearing structure includes: an air bearing, a bearing base, an end cover and a heat conductor. The air bearing is connected to the bearing base. The air bearing includes a first axial hole. The heat conductor is sandwiched between the bearing base and the end cover. The thermal conductivity of the heat conductor is greater than that of the bearing base. The heat conductor includes a first end and a second end. A solid extension structure is provided between the first end and the second end of the heat conductor. The first end is provided at a position close to the first axial hole relative to the second end or at a position opposite to the outer circle of the first axial hole in the axial direction. The second end is provided at an outer ring position close to the end cover relative to the first end or at an outer ring position of the end cover. According to the present invention, the inner ring of the bearing and other parts are effectively heat-conducted and heat-dissipated, thereby improving the cooling effect on the bearing.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to an axial bearing structure and a motor. Background Art

[0002] The dynamic pressure air suspension axial bearing structure in the current motor, see the original technology Figure 1 The overall structure of the motor is composed of an air bearing 101, a bearing base 102, a fastener 103, and an end cover 104. The air bearing 101 is usually fixed to the bearing base 102 by welding / snapping to form a bearing stator as a whole; the fastener 103 is usually a pin / screw, and the air bearing 101 and the bearing base 102 are fixed / limited to the end cover 104 by the fastener 103, as shown in the original technology Figure 2 shown.

[0003] The main defects of the original technical structure are as follows:

[0004] 1. Failure to balance dynamic adaptability and reliability, improper design will affect bearing performance:

[0005] When the fastener 103 is a pin, the pin structure only provides radial and circumferential limitation for the entire bearing, and the entire bearing stator is free in the axial direction. The advantage of this structure is that it can improve the dynamic adaptability of the gas dynamic pressure axial bearing, but its reliability is reduced because the bearing stator has no axial limitation.

[0006] When the fastener 103 is screwed, the bearing stator can be completely fixed on the end cover by screw locking, which improves the structural reliability but reduces the dynamic adaptability. At the same time, due to the structural characteristics of the hydrodynamic bearing, such as the original technology Figure 2 As shown, the screws 103 can usually only be set on the outer ring of the bearing base 102. However, when the tightening torque of the screws on the outer ring of the bearing is not set properly, when the outer ring is tightened, the inner ring is completely free of force, which may cause deformation of the bearing base 102, resulting in a decrease in bearing performance.

[0007] 2. The cooling effect of the bearing stator is poor:

[0008] In the whole machine structure, the end cover 104 is usually directly connected to the water-cooling housing / water-cooling channel, so its temperature is relatively low, so the bearing stator is generally cooled through the end cover.

[0009] When the fastener 103 is a pin, since the pin structure is not axially fixed, the bearing base 102 and the end cover 104 cannot be fully in contact, resulting in a gap between the two parts, which greatly affects the thermal conductivity between the bearing stator and the end cover and makes the cooling effect worse.

[0010] When the fastener 103 is a screw, the screw can only fix the outer ring of the bearing stator so that the outer ring is in good contact with the end cover. However, since the inner ring cannot be fastened in the same way, there is still a gap between the parts, affecting cooling. Since the inner ring of the bearing is the main working area and the main heat generation area, even if screws are used for fastening, the cooling effect will not be significantly improved compared to the pin solution.

[0011] In summary, the existing technical solution of the air-suspended axial bearing structure has problems such as failure to balance the dynamic adaptability and reliability of the bearing, poor cooling effect, and improper design affecting the bearing performance.

[0012] Since the dynamic pressure air suspension axial bearing structure in the motor in the prior art has poor cooling effect and poor heat dissipation effect, which greatly affects the reliability and service life of the bearing; and the existing bearing structure is prone to axial movement and has poor axial reliability; the bearing has poor damping effect, poor vibration reduction and vibration absorption performance, poor dynamic adaptability and other technical problems, the present invention studies and designs an axial bearing structure and a motor. Summary of the invention

[0013] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor cooling effect of the dynamic pressure air suspension axial bearing structure in the motor in the prior art, thereby providing an axial bearing structure and a motor.

[0014] In order to solve the above problems, the present invention provides an axial bearing structure, which includes:

[0015] A bearing, a bearing base, an end cover and a heat-conducting member, wherein the bearing is connected to the bearing base, the bearing comprises a first axial hole, the heat-conducting member is sandwiched between the bearing base and the end cover, and the thermal conductivity of the heat-conducting member is greater than the thermal conductivity of the bearing base;

[0016] The heat conductor includes a first end and a second end, and a solid extension structure is provided between the first end and the second end of the heat conductor. The first end is arranged at a position close to the first axial hole relative to the second end or at a position opposite to the outer circle of the first axial hole in the axial direction, and the second end is arranged at an outer ring position close to the end cover relative to the first end or at an outer ring position of the end cover.

[0017] In some embodiments, the heat conducting member is a metal strip structure; and / or,

[0018] The end cover is a disc structure, and there are a plurality of heat-conducting members, which are arranged at intervals in the circumferential direction of the end cover.

[0019] In some embodiments, the cross-section of the heat conductor is a U-shaped structure, the bottom end of the U-shaped structure is the first end, and both top ends of the U-shaped structure are the second ends, so that the number of the second ends is two.

[0020] In some embodiments, a first groove is provided on a side surface of the end cover facing the bearing base, and at least a portion of the structure of the heat conducting member can be clamped in the first groove.

[0021] In some embodiments, a groove depth of the first groove in the axial direction is smaller than an axial thickness of the heat conducting member.

[0022] In some embodiments, a thermally conductive plastic sealing component is further included, and the thermally conductive plastic sealing component is filled and sealed between the bearing base and the end cover by a plastic sealing material, and the thermal conductivity of the plastic sealing material is greater than the thermal conductivity of the bearing base; during the process of filling and sealing the thermally conductive plastic sealing component, the thermally conductive plastic sealing component can penetrate into the gap between at least two of the bearing base, the thermally conductive component and the end cover, and then be sealed and formed.

[0023] In some embodiments, the plastic packaging material is a potting material.

[0024] In some embodiments, a fixing hole is provided on the bearing base in an axial direction, and after the heat-conductive plastic sealing component is filled and sealed, a part of the structure enters the fixing hole and is fixed.

[0025] In some embodiments, when a first groove is provided on one side surface of the end cover facing the bearing base, and at least a portion of the structure of the heat conductor can be clamped in the first groove, the top surface of the heat conductor protrudes from the top of the first groove, and after the heat conductive plastic sealing component is filled and sealed, a portion of its structure forms a second groove matching the protruding portion of the heat conductive component, and the second groove can be clamped with the protruding portion of the heat conductive component to form mutual limitation in the circumferential direction and the radial direction.

[0026] In some embodiments, the hardness of the thermally conductive plastic sealing component is smaller than the hardness of the heat conductive member, which is smaller than the hardness of the bearing base, and the thermally conductive plastic sealing component can be deformed after being heated to a specified temperature.

[0027] In some embodiments, the axial bearing structure is a hydrodynamic air suspension axial bearing structure.

[0028] The present invention also provides a motor, comprising the axial bearing structure described in any of the preceding items.

[0029] The axial bearing structure and the motor provided by the present invention have the following beneficial effects:

[0030] 1. The present invention can effectively conduct heat by setting a heat-conducting member between the bearing base and the end cover, and the heat conductivity of the heat-conducting member is greater than that of the bearing base. The heat of the inner ring of the bearing can be effectively conducted by setting the first end of the heat-conducting member close to the first shaft hole or opposite to the outer circle of the first shaft hole. The second end of the heat-conducting member is set on the outer ring of the end cover or close to the outer ring. The heat-conducting member is a solid extension structure from the first end to the second end. The heat-conducting member can effectively conduct heat from the first end to the second end, so that the heat of the inner ring of the bearing can be conducted to the outside of the end cover, effectively performing good heat conduction and heat dissipation on the inner ring of the bearing and other parts, thereby improving the cooling effect of the bearing; and improving the cooling effect of the axial bearing structure;

[0031] 2. The present invention also provides a heat-conducting plastic sealing member between the bearing base and the end cover by filling and sealing, and the thermal conductivity of the plastic sealing material is greater than the thermal conductivity of the bearing base. During the filling and sealing molding of the heat-conducting plastic sealing member, the heat-conducting plastic sealing member can penetrate into the gap between at least two of the bearing base, the heat-conducting member and the end cover, and can effectively contact the gap between the heat-conducting member and at least two of the bearing base and the end cover through the heat-conducting plastic sealing member, and then contact the position where the heat-conducting member cannot contact and dissipate heat, and then the heat-conducting plastic sealing member can further improve the cooling effect of the axial bearing, further improve the heat dissipation capacity, and further improve the heat exchange efficiency of the heat-conducting member;

[0032] 3. The present invention also provides a fixing hole structure on the bearing base, so that the plastic sealing material matched with it can enter the fixing hole for plastic sealing molding, and the plastic sealing material and the fixing hole can form a limit to the bearing base through the cooperation, and at the same time effectively position the heat-conducting plastic sealing part to prevent it from failing and moving, meet the axial fixation requirements of the bearing assembly, and improve reliability; through the second groove formed by the heat-conducting plastic sealing part and the protruding part of the heat-conducting part, a clamping effect is formed between the protruding part and the second groove, so that the heat-conducting plastic sealing part can be effectively limited and fixed through the protruding heat-conducting part, further increase the contact friction, and further prevent the heat-conducting plastic sealing part from failing and moving. The present invention also uses the heat-conducting plastic sealing part as the material of the potting glue, which can form an effective bonding effect between at least two of the bearing base, the heat-conducting part and the end cover, further improve the fixing and limiting effect of the heat-conducting plastic sealing part, and further improve the cooling and heat dissipation capacity of the axial bearing;

[0033] 4. The present invention sets the hardness of the plastic sealing material of the heat-conducting plastic sealing part to be much smaller than that of the metal material, which will cause displacement and deformation when subjected to force, especially under high temperature conditions, so that there is a certain elastic support between the bearing base and the end cover, which can increase the damping of the bearing assembly and improve the shock absorption performance of the bearing. Therefore, the structural bearing of the present invention can also perform a certain axial movement and has a certain dynamic adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an exploded view of the axial bearing structure of the prior art;

[0035] Figure 2 It is a longitudinal cross-sectional view of the axial bearing structure of the prior art;

[0036] Figure 3 An exploded view of the axial bearing structure of the present invention;

[0037] Figure 4 is a longitudinal sectional view of the axial bearing structure of the present invention;

[0038] Figure 5 for Figure 4 A partial enlarged view of part I in FIG.

[0039] Figure 6 for Figure 4 A partial enlarged view of part II in FIG.

[0040] The reference numerals are:

[0041] 101. air bearing; 102. bearing base; 103. fastener; 104. end cover;

[0042] 201, bearing; 201a, first axial hole; 202, bearing base; 202a, fixing hole; 203, thermal conductive plastic sealing member; 203a, second groove; 204, thermal conductive member; 204a, first end; 204b, second end; 205, end cover; 205a, first groove. DETAILED DESCRIPTION

[0043] like Figure 3-6 The present invention provides an axial bearing structure, which comprises:

[0044] A bearing 201, a bearing base 202, an end cover 205 and a heat conductive member 204, wherein the bearing 201 (preferably an air bearing) is connected to the bearing base 202, the bearing 201 comprises a first axial hole 201a, the heat conductive member 204 is sandwiched between the bearing base 202 and the end cover 205, and the thermal conductivity of the heat conductive member 204 is greater than the thermal conductivity of the bearing base 202;

[0045] The heat conductive member 204 includes a first end 204a and a second end 204b, and a solid extension structure is provided between the first end 204a and the second end 204b of the heat conductive member 204. The first end 204a is arranged at a position close to the first axial hole 201a relative to the second end 204b or at a position opposite to the outer circle of the first axial hole 201a in the axial direction, and the second end 204b is arranged at an outer ring position close to the end cover 205 relative to the first end 204a or at an outer ring position of the end cover 205.

[0046] The present invention can effectively conduct heat by arranging a heat conductor between the bearing base and the end cover, and the thermal conductivity of the heat conductor is greater than that of the bearing base. The first end of the heat conductor is arranged at a position close to the first axial hole or opposite to the outer circle of the first axial hole, so that the heat of the inner ring of the bearing can be effectively conducted out. The second end of the heat conductor is arranged at the outer ring of the end cover or close to the outer ring, and the heat conductor is a solid extension structure from the first end to the second end. The heat conductor can effectively conduct heat from the first end to the second end, so that the heat of the inner ring of the bearing can be conducted to the outside of the end cover, effectively performing good heat conduction and heat dissipation on the inner ring of the bearing and other parts, thereby improving the cooling effect on the bearing; and improving the cooling effect of the axial bearing structure.

[0047] The present invention provides a dynamic pressure gas suspension axial bearing structure, in which evenly distributed heat-conducting metal strips are arranged between the dynamic pressure gas bearing base and the motor end cover, and the heat-conducting metal strips, the motor end cover and the bearing base are potted and connected by heat-conducting glue. The reliability can be improved while ensuring the dynamic adaptability of the bearing, the cooling effect of the bearing can be improved, and the damping and shock absorption performance of the bearing can be increased, thereby improving the overall reliability.

[0048] Option 1: If Figure 3 As shown, the axial bearing structure of the present invention is composed of a bearing 201 (preferably an air bearing), a bearing base 202, thermally conductive glue (thermal conductive plastic sealing member 203) on both sides of the thermally conductive metal strip, a thermally conductive metal strip (thermal conductive member 204), and an end cover 205.

[0049] The heat conductive part 204 interacts with the heat conductive plastic sealing part 203. Even if the heat conductive glue has a higher thermal conductivity, its heat conductive performance is much lower than that of metal materials. However, it is difficult for metals to fit perfectly together, and there will be air gaps in the middle that affect heat conduction. Therefore, the main functions of the heat conductive glue are to fix, absorb shock, and exhaust air. The principle is similar to applying silicone between the computer CPU and the cooling fan. It is not that silicone has good heat conductivity, but that it plays a role of complete fitting. The heat conductive metal strip improves heat conduction, and at the same time, it can dissipate heat in a targeted manner to connect the severe heating area with the low temperature area.

[0050] In some embodiments, the heat conductor 204 is a metal strip structure, preferably a copper alloy; and / or the end cover 205 is a disc structure, and there are multiple heat conductors 204, and the multiple heat conductors 204 are arranged at intervals in the circumferential direction of the end cover 205. This is the preferred structural form of the heat conductor of the present invention. The metal strip structure has good thermal conductivity, and its thermal conductivity is greater than that of the bearing base. The heat of the inner ring of the bearing can be quickly discharged to the outer ring through the strip structure, thereby improving the heat dissipation effect; the arrangement of multiple heat conductors can increase the heat conduction area of ​​the bearing in the circumferential direction of the end cover, thereby further enhancing the thermal conductivity, heat dissipation capacity and cooling effect.

[0051] In some embodiments, the cross section of the heat conducting member 204 is a U-shaped structure, the bottom end of the U-shaped structure is the first end 204a, and the two top ends of the U-shaped structure are both the second ends 204b, so that the second ends 204b are two. This is a further preferred structural form of the heat conducting member of the present invention. Through the structure of the U-shaped structure, the bottom end is the first end that can guide the heat of the inner ring of the bearing, and the heat can be transferred to the top end through the two arms, thereby further effectively increasing the heat exchange area, improving the heat exchange effect, and enhancing the cooling effect on the bearing.

[0052] The heat-conducting metal strip is made of high thermal conductivity material, usually copper alloy, whose thermal conductivity is usually 15 to 25 times that of the bearing base material. Usually, the heat-conducting metal strip can be designed into a U-shaped structure to increase the contact area and improve the heat conduction effect, such as Figure 3 As shown in the figure, because the heat generated by the inner ring of the bearing assembly is much greater than that generated by the outer ring, and the outer ring of the end cover is the area that is in main contact with the water-cooling housing / water-cooling channel, the U-shaped area of ​​the heat-conducting metal strip is usually arranged close to the inner ring of the bearing assembly to increase the contact area with the heat source, and the straight part at the tail end is arranged on the outer ring of the end cover. This arrangement can quickly transfer the heat of the inner ring of the bearing to the low-temperature area of ​​the outer ring of the end cover for cooling through the U-shaped heat-conducting metal strip;

[0053] Alternative embodiments, such as Figure 3 As shown, considering the simplicity of process and processing cost, the heat-conducting metal strip can be set to a straight line, with one end set at the inner ring of the bearing and the other end set at the outer ring of the end cover, which can achieve the effect of transferring heat to the outer ring, but the cooling effect is reduced;

[0054] In some embodiments, a first groove 205a is provided on one side of the end cover 205 facing the bearing base 202, and at least a portion of the structure of the heat conducting member 204 can be clamped in the first groove 205a. The present invention also effectively positions and limits the heat conducting member by providing the first groove on the end cover and clamping the heat conducting member in the first groove.

[0055] The end cover 205 is provided with a mounting groove (first groove) having the same structure as the heat-conducting metal strip for fixing the heat-conducting metal strip. The depth of the mounting groove is less than the thickness of the heat-conducting metal strip, so that the heat-conducting metal strip can protrude a part of the mounting groove.

[0056] In some embodiments, the groove depth of the first groove 205a in the axial direction is less than the axial thickness of the heat conductive member 204. In the present invention, the groove depth of the first groove is preferably less than the axial thickness of the heat conductive member, so that the heat conductive member protrudes out of the first groove in the axial direction, so that the heat conductive member can be clamped with the heat conductive plastic sealing member through the protruding portion, and the heat conductive plastic sealing member can be effectively limited while the heat dissipation of the bearing is enhanced through the heat conductive plastic sealing member, thereby improving the reliability of the bearing structure.

[0057] In some embodiments, a heat-conductive plastic sealing component 203 is also included. The heat-conductive plastic sealing component 203 is filled and sealed between the bearing base 202 and the end cover 205 by means of a plastic sealing material, and the thermal conductivity of the plastic sealing material is greater than the thermal conductivity of the bearing base 202. During the process of filling and sealing the heat-conductive plastic sealing component 203, the heat-conductive plastic sealing component 203 can penetrate into the gap between at least two of the bearing base 202, the heat-conductive component 204 and the end cover 205, thereby achieving plastic sealing. The present invention also provides a heat-conducting plastic sealing component between the bearing base and the end cover by filling and sealing, and the thermal conductivity of the plastic sealing material is greater than the thermal conductivity of the bearing base. During the filling and sealing molding process of the heat-conducting plastic sealing component, the heat-conducting plastic sealing component can penetrate into the gap between at least two of the bearing base, the heat-conducting component and the end cover, and can effectively contact the gap between the heat-conducting component and the bearing base, and at least two of the end covers through the heat-conducting plastic sealing component, and then contact the position where the heat-conducting component cannot contact the heat dissipation, and then the heat-conducting plastic sealing component can further improve the cooling effect of the axial bearing, further improve the heat dissipation capacity, and further improve the heat exchange efficiency of the heat-conducting component.

[0058] The heat-conducting adhesive (i.e., the heat-conducting plastic sealing member 203) uses a potting adhesive with high thermal conductivity and certain bonding strength, and epoxy resin material can usually be used. Since the parts cannot achieve complete contact during the actual assembly process, the main function of the heat-conducting adhesive is to eliminate the air gap between the bearing base 202 and the heat-conducting metal strip, and between the heat-conducting metal strip and the end cover 205, thereby improving the heat exchange efficiency of the heat-conducting metal strip.

[0059] In some embodiments, the plastic sealing material is a potting glue material. Preferably, the plastic sealing material is an epoxy resin material. The present invention also forms an effective bonding effect between at least two of the bearing base, the heat conductive member and the end cover by using the heat conductive plastic sealing member as the potting glue material, further improving the fixing and limiting effect of the heat conductive plastic sealing member, and further improving the cooling and heat dissipation capacity of the axial bearing.

[0060] In some embodiments, the bearing base 202 is provided with a fixing hole 202a extending through the axial direction, and the heat-conducting plastic sealing member 203 is fixed in the fixing hole 202a after being filled and plastic-sealed. The present invention also provides a fixing hole structure provided on the bearing base, so that the plastic sealing material matched therewith can enter the fixing hole for plastic-sealing, and the plastic sealing material can be matched with the fixing hole to limit the bearing base, and the heat-conducting plastic sealing member can be effectively positioned to prevent it from failing and moving, thereby meeting the requirement of axial fixation of the bearing assembly and improving reliability.

[0061] The bearing base 202 is provided with a fixing hole, which can usually be a round hole. The bearing module is integrally potted so that the thermal conductive glue enters therein, and after curing, the circumferential and radial limitations of the bearing stator assembly are met.

[0062] In some embodiments, when a first groove 205a is provided on one side of the end cover 205 facing the bearing base 202, and at least a part of the structure of the heat conductive member 204 can be stuck in the first groove 205a, the top surface of the heat conductive member 204 protrudes from the top of the first groove 205a, and after the heat conductive plastic sealing member 203 is filled and plastic-sealed, a part of its structure forms a second groove 203a matching the protruding part of the heat conductive member 204, and the second groove 203a can be stuck with the protruding part of the heat conductive member 204, forming mutual limitation in the circumferential direction and radial direction. The present invention can form a second groove formed by the heat conductive plastic sealing member and the protruding part of the heat conductive member through the above structure, so that a blocking effect is formed between the protruding part and the second groove, so that the heat conductive plastic sealing member can be effectively limited and fixed by the protruding heat conductive member, further increasing the contact friction, and further preventing the heat conductive plastic sealing member from failing and moving.

[0063] In some embodiments, the hardness of the heat-conducting plastic sealing member 203 is less than the hardness of the heat-conducting member 204, and the hardness of the heat-conducting plastic sealing member 203 is less than the hardness of the bearing base 202. After being heated to a specified temperature, the heat-conducting plastic sealing member 203 can be deformed. The present invention sets the hardness of the plastic sealing material of the heat-conducting plastic sealing member to be less than that of the metal material, and displacement deformation occurs when subjected to force, especially at high temperatures, so that there is a certain elastic support between the bearing base and the end cover, which can increase the damping of the bearing assembly and improve the shock absorption performance of the bearing. Therefore, the structural bearing of the present invention can also perform a certain axial movement and has a certain dynamic adaptability.

[0064] In some embodiments, the axial bearing structure is a hydrodynamic air suspension axial bearing structure.

[0065] Beneficial effects of the present invention:

[0066] 1. Improve the reliability of axial bearings. Figure 3-4 As shown, since the bearing base 202 is provided with a fixing hole, when the thermal conductive glue is potted and cured, circumferential and radial limits are formed. Since the thermal conductive glue simultaneously connects the bearing base 202, the thermal conductive metal strip, and the end cover 205, and the thermal conductive glue has a certain bonding strength, it meets the axial fixation requirements of the bearing assembly and improves reliability. Since the thickness of the metal thermal conductive strip is greater than the end cover mounting groove, when the thermal conductive glue is cured on the end cover surface to bond the bearing seat and the metal thermal conductive strip, the protruding metal thermal conductive strip also plays a role in limiting and fixing the thermal conductive glue and increasing the contact friction, preventing the thermal conductive glue from failing and moving.

[0067] 2. Improve the bearing damping, shock absorption performance and dynamic adaptability. When the gas dynamic pressure bearing is running, it will generate large wind friction loss, causing the bearing to heat up. When the temperature rises, the hardness of the thermal conductive glue will decrease compared to after curing, so that there is a certain elastic support between the bearing base 202 and the end cover 205, which can increase the damping of the bearing assembly and improve the bearing shock absorption performance;

[0068] 3. Since the hardness of the thermal conductive adhesive is much smaller than that of the metal material, especially under high temperature conditions, it will produce displacement deformation similar to the pin fastening method in the original technology, so the structural bearing of the present invention also has a certain dynamic adaptability.

[0069] 4. Improve the cooling effect. For example, local enlargement Figure 3 Thermally conductive adhesive is used to eliminate air gaps between parts to improve thermal conductivity. At the same time, a thermally conductive metal strip is arranged near the inner ring of the bearing assembly to quickly and specifically dissipate heat in areas with severe heat generation, thereby improving the overall cooling effect of the bearing.

[0070] The present invention also provides a motor, comprising the axial bearing structure described in any of the preceding items.

[0071] The present invention arranges uniformly distributed heat-conducting metal strips between the dynamic pressure gas bearing base and the motor end cover, and the heat-conducting metal strips are potted and connected with the motor end cover and the bearing base by heat-conducting glue, which can improve the cooling effect, improve the reliability of the axial bearing, and improve the bearing damping, shock absorption performance and dynamic adaptability.

[0072] The above description is only 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 principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An axial bearing structure, characterized in that: include: A bearing (201), a bearing base (202), an end cover (205) and a heat conducting member (204), wherein the bearing (201) is connected to the bearing base (202), the bearing (201) comprises a first axial hole (201a), the heat conducting member (204) is sandwiched between the bearing base (202) and the end cover (205), and the heat conductivity of the heat conducting member (204) is greater than the heat conductivity of the bearing base (202); The heat conducting member (204) comprises a first end (204a) and a second end (204b); a solid extension structure is provided between the first end (204a) and the second end (204b) of the heat conducting member (204); the first end (204a) is arranged at a position close to the first shaft hole (201a) relative to the second end (204b) or at a position opposite to the outer circle of the first shaft hole (201a) in the axial direction; and the second end (204b) is arranged at a position close to the outer circle of the end cover (205) relative to the first end (204a) or at a position at the outer circle of the end cover (205); The end cover (205) is a disc structure, the heat conducting member (204) is multiple, and the multiple heat conducting members (204) are arranged at intervals in the circumferential direction of the end cover (205); The cross section of the heat conducting member (204) is a U-shaped structure, the bottom end of the U-shaped structure is the first end (204a), and the two top ends of the U-shaped structure are both the second ends (204b), so that the second ends (204b) are two.

2. The axial bearing structure according to claim 1, characterized in that: The heat conducting member (204) is a metal strip structure.

3. The axial bearing structure according to claim 1, characterized in that: A first groove (205a) is provided on one side of the end cover (205) facing the bearing base (202), and at least a part of the structure of the heat conducting member (204) can be clamped in the first groove (205a).

4. The axial bearing structure according to claim 3, characterized in that: The groove depth of the first groove (205a) in the axial direction is smaller than the axial thickness of the heat conducting member (204).

5. The axial bearing structure according to any one of claims 1 to 4, characterized in that: It also includes a heat-conducting plastic sealing member (203), wherein the heat-conducting plastic sealing member (203) is sealed between the bearing base (202) and the end cover (205) by filling and sealing the plastic sealing material, and the thermal conductivity of the plastic sealing material is greater than the thermal conductivity of the bearing base (202); During the process of filling and plastic-sealing the heat-conducting plastic sealing component (203), the heat-conducting plastic sealing component (203) can penetrate into the gap between at least two of the bearing base (202), the heat-conducting component (204) and the end cover (205), thereby achieving plastic-sealing.

6. The axial bearing structure according to claim 5, characterized in that: The plastic sealing material is a potting glue material.

7. The axial bearing structure according to claim 5, characterized in that: The bearing base (202) is provided with a fixing hole (202a) penetrating along the axial direction, and after the heat-conducting plastic sealing component (203) is filled and plastic-sealed, a part of the structure enters the fixing hole (202a) and is fixed.

8. The axial bearing structure according to claim 5, characterized in that: When a first groove (205a) is provided on one side surface of the end cover (205) facing the bearing base (202), and at least a part of the structure of the heat conductive component (204) can be clamped in the first groove (205a), the top surface of the heat conductive component (204) protrudes from the top of the first groove (205a), and after the heat conductive plastic sealing component (203) is filled and plastic-sealed, a part of its structure forms a second groove (203a) matching the protruding part of the heat conductive component (204), and the second groove (203a) can be clamped with the protruding part of the heat conductive component (204), so as to form mutual limitation in the circumferential direction and the radial direction.

9. The axial bearing structure according to claim 5, characterized in that: The hardness of the heat-conducting plastic sealing component (203) is smaller than that of the heat-conducting component (204), and the hardness of the heat-conducting plastic sealing component (203) is smaller than that of the bearing base (202). After being heated to a specified temperature, the heat-conducting plastic sealing component (203) can be deformed.

10. The axial bearing structure according to any one of claims 1 to 9, characterized in that: The axial bearing structure is a dynamic pressure air suspension axial bearing structure.

11. A motor, characterized in that: The invention comprises the axial bearing structure according to any one of claims 1 to 10.

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