Rotating shaft, motor and refrigeration equipment
By setting a texture area on the sliding section of the motor shaft to accommodate lubricant, the temperature increase caused by sliding friction between the shaft and the bearing is solved, and the efficiency and stability of the motor are improved.
Patent Information
- Application Number
- CN202421011475.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-10
AI Technical Summary
During the motor operation, the sliding friction between the shaft and the bearing leads to large friction loss, resulting in increased temperature and reduced motor efficiency.
A rotating shaft is designed, including a mounting section and a sliding section, the sliding section is arranged through the bearing, and a textured area is provided on its surface to accommodate lubricant, reduce friction resistance, and ensure the stability of the oil film.
It effectively reduces the friction between the shaft and the bearing, avoids excessive temperature, and improves the efficiency and stability of the motor.
Smart Images
Figure CN222301544U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a rotating shaft, a motor and a refrigeration device. Background Art
[0002] During the operation of the motor, there is sliding friction between the bearing and the shaft, and the friction loss between the two is large, which makes the temperature of the bearing too high, thereby reducing the efficiency of the motor. Utility Model Content
[0003] The main purpose of the utility model is to propose a rotating shaft, a motor and a refrigeration device, aiming to increase the content of lubricating substances between the rotating shaft and the bearing, ensure the stability of the oil film on the relative surfaces of the two, thereby avoiding excessive temperature rise and ensuring the efficiency of the motor.
[0004] To achieve the above-mentioned purpose, the rotating shaft proposed in the utility model is applied to a motor, wherein the stator or housing of the motor is provided with a bearing, and the rotating shaft comprises:
[0005] a mounting section connected to a rotor of the motor; and
[0006] A sliding section is arranged adjacent to the mounting section, the sliding section is configured as two and is arranged at the axial ends of the mounting section, the sliding section is used to be rotatably passed through the bearing, and a textured area is provided on the surface of at least one of the two sliding sections, and the textured area can place lubricant from the surface of the sliding section toward the inside.
[0007] In one embodiment, the textured region is continuously distributed in a circumferential direction of the sliding segment.
[0008] In one embodiment, the textured region includes a plurality of grooves distributed in an array, and the plurality of grooves are formed by being recessed from the surface of the sliding section.
[0009] In one embodiment, a plurality of the grooves are evenly spaced and distributed in the same circumferential direction of the sliding section.
[0010] In one embodiment, in the axial direction of the sliding section, the plurality of grooves are evenly spaced and distributed.
[0011] In one embodiment, a distance between two adjacent grooves in the circumferential direction is not greater than a distance between two adjacent grooves in the axial direction.
[0012] In one embodiment, in the axial direction of the shaft, the length of the textured region is greater than the length of the bearing.
[0013] The utility model also provides a motor, which comprises a rotor and the aforementioned rotating shaft, wherein the rotating shaft is arranged on the rotor.
[0014] In one embodiment, the stator or housing of the motor is provided with a sliding bearing, and the sliding section is passed through the inner hole of the sliding bearing and is clearance-matched with the sliding bearing.
[0015] In one embodiment, the textured area is formed on opposite sides of the sliding segment and the sliding bearing.
[0016] The utility model also provides a refrigeration device, which includes the motor as described above.
[0017] The technical solution of the utility model is to insert the sliding section into the bearing so that the two can slide together. During the rotation of the rotor pulling installation section of the motor, the entire rotating shaft rotates relative to the bearing, and sliding friction occurs between the sliding section and the bearing. A large amount of lubricant is filled in the cavity of the stator or the housing for installing the bearing, and lubricant is also filled between the sliding section and the bearing to reduce the friction resistance between the rotating shaft and the sliding section. A textured area is provided on the surface of at least one sliding section relative to the bearing. The textured area can accommodate part of the lubricant in the space on the surface of the sliding section close to the center of the rotating shaft. In this way, during the high-speed rotation of the rotating shaft, the centrifugal effect of the lubricant in the textured area is relatively weak to ensure the stability of the oil film formed by the surface of the sliding section and the inner hole surface of the bearing, thereby reducing the excessive temperature rise of the rotating shaft and the bearing due to friction, and ensuring the efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0019] Figure 1 A structural schematic diagram of an embodiment of a rotating shaft provided by the utility model;
[0020] Figure 2 for Figure 1 A partial enlarged view of the middle A;
[0021] Figure 3 A structural schematic diagram of another embodiment of the rotating shaft provided by the utility model;
[0022] Figure 4 A structural schematic diagram of another embodiment of the rotating shaft provided by the utility model;
[0023] Figure 5 This is a schematic structural diagram of an embodiment of a motor provided by the utility model.
[0024] Description of Figure Numbers:
[0025] 100, rotating shaft; 110, mounting section; 120, sliding section; 121, textured area; 122, groove;
[0026] 200, bearing; 300, rotor; 400, stator.
[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0031] In the prior art, for rolling bearings, the rotating shaft in the motor and the inner ring of the rolling bearing can be fixedly matched, relying on the rolling friction between the balls in the rolling bearing and the inner ring and the outer ring to ensure the stable rotation of the rotating shaft, or the rotating shaft in the motor and the inner ring of the rolling bearing can be clearance matched and can rotate with each other. At this time, there is sliding friction between the rotating shaft and the inner ring of the rolling bearing, and rolling friction between the inner and outer rings of the rolling bearing. In the above friction mode, the friction loss between the rotating shaft and the rolling bearing or inside the rolling bearing is relatively large, and the amount of grease between any relative friction surfaces is easily reduced due to the rapid rotation of the rotating shaft, thereby destroying the stability of the oil film on its surface, causing the rolling bearing to heat up too high, affecting the efficiency of the motor. Similarly, for the sliding bearing, the rotating shaft in the motor and the inner hole clearance of the sliding bearing are matched and can rotate with each other, and the inner and outer rings of the sliding bearing can also slide with each other. That is, during the operation of the motor, sliding friction occurs between the sliding bearing and the rotating shaft. The amount of grease between any relative friction surfaces is easily reduced due to the rapid rotation of the rotating shaft, thereby destroying the stability of the oil film on its surface, causing the sliding bearing to heat up too much, affecting the efficiency of the motor.
[0032] The utility model provides a rotating shaft 100 .
[0033] Please refer to Figure 1 , Figure 2 and Figure 5 In one embodiment of the utility model, the rotating shaft 100 is applied to a motor, and the stator 400 or the housing of the motor is provided with a bearing 200. The rotating shaft 100 includes:
[0034] A mounting section 110 connected to a rotor 300 of the motor; and
[0035] The sliding section 120 is disposed adjacent to the mounting section 110. The sliding section 120 is configured as two and is disposed at both axial ends of the mounting section 110. The sliding section 120 is used to rotatably pass through the bearing 200. A textured area 121 is provided on the surface of at least one of the two sliding sections 120. The textured area 121 can place lubricant from the surface of the sliding section 120 toward the inside.
[0036] The technical solution of the utility model is to insert the sliding section 120 into the bearing 200 so that the two can slide together. When the rotor 300 of the motor pulls the mounting section 110 to rotate, the entire rotating shaft 100 rotates relative to the bearing 200, and sliding friction occurs between the sliding section 120 and the bearing 200. A large amount of lubricant is filled in the cavity of the stator 400 or the housing for mounting the bearing 200, and lubricant is also filled between the sliding section 120 and the bearing 200 to reduce the friction resistance between the rotating shaft 100 and the sliding section 120. force, at least one sliding section 120 is provided with a textured area 121 on the surface relative to the bearing 200, and the textured area 121 can accommodate part of the lubricant in the space on the surface of the sliding section 120 close to the center of the shaft 100. In this way, during the high-speed rotation of the shaft 100, the centrifugal effect of the lubricant in the textured area 121 is relatively weak, so as to ensure the stability of the oil film formed by the surface of the sliding section 120 and the inner hole surface of the bearing 200, thereby reducing the excessive temperature rise of the shaft 100 and the bearing 200 due to friction, and ensuring the efficiency of the motor.
[0037] Please note that, please refer to Figure 1 , Figure 3 and Figure 4 The two sliding sections 120 are disposed at both ends of the mounting section 110, respectively corresponding to the side of the rotating shaft 100 extending out of the motor and the side away from the motor output end. At this time, in one embodiment, the textured area 121 can be provided on both sliding sections 120, or the textured area 121 can be provided only on the sliding section 120 on the side close to the motor output end, or the textured area 121 can be provided only on the sliding section 120 on the side away from the motor output end. In addition, the corresponding texture area 121 is formed inward from the surface of the sliding section 120 to accommodate the space for accommodating the lubricant, which can be a blind hole formed inward from the surface of the sliding section 120, the blind hole is deep and large, and there are multiple blind holes in each texture area 121, or it can be a groove 122 formed by being recessed inward from the surface of the sliding section 120, the depth of the groove 122 is shallow, and there are multiple grooves 122 in each texture area 121. Regardless of whether it is a blind hole or a groove 122, its shape on the surface of the sliding section can be circular, elliptical, polygonal, etc., and the same texture area 121 can have both blind holes and grooves 122, and the depths of the blind holes or grooves 122 can be equal or unequal, and the selection can be made according to the specifications of the motor and the use environment.
[0038] The sliding section 120 of the rotating shaft 100 is rotatably disposed in the inner hole of the bearing 200, and slides relative to the inner ring and the outer ring of the bearing to achieve two-level sliding friction, thereby ensuring the smooth rotation of the rotating shaft 100. In addition, the lubricant can be a lubricating grease such as calcium-based grease, sodium-based grease, lithium-based grease, etc., or a lubricating substance such as lubricating oil.
[0039] In one embodiment, please refer to Figure 1 and Figure 2 , the textured area 121 is continuously distributed in the circumferential direction of the sliding section 120. It can be understood that the lubricant can be well accommodated at any place in the circumferential direction of the sliding section 120. During the rotation of the rotating shaft 100, the lubricant content in each place of the annular gap formed by the sliding section 120 and the bearing 200 tends to be uniform, thereby ensuring that the lubricant oil film between the surface of the sliding section 120 and the surface relative to the inner hole of the bearing 200 is uniform everywhere, making the oil film more stable, effectively reducing the sliding friction between the rotating shaft 100 and the bearing 200, thereby preventing the bearing 200 from heating up too quickly and affecting the efficiency of the motor. Of course, in other embodiments, the surface of the same sliding section 120 can also be distributed with multiple textured areas 121, and the multiple textured areas 121 are evenly spaced on the surface of the sliding section 120, or, the surface of the sliding section 120 is only provided with one textured area 121, and the textured area 121 does not fully cover the circumference of the sliding section 120.
[0040] In one embodiment, please refer to Figure 1 and Figure 2 The texture area 121 includes a plurality of grooves 122 distributed in an array, and the plurality of grooves 122 are formed by being concavely set on the surface of the sliding section 120. It can be understood that the depth of the grooves 122 is relatively shallow, and the friction between the sliding section 120 and the bearing 200 can be effectively reduced while ensuring the stability of the output of the rotating shaft 100. The plurality of grooves 122 are arranged in an array to achieve uniform distribution of the plurality of grooves 122 in the texture area 121, thereby ensuring the uniformity of the lubricant film at various locations of the sliding section 120, effectively reducing the sliding friction between the rotating shaft 100 and the bearing 200, thereby preventing the bearing 200 from heating up too quickly and affecting the efficiency of the motor. Among them, the opening shape of the grooves 122 on the surface of the sliding section 120 can be circular, elongated, or polygonal, etc. Of course, in other embodiments, the plurality of grooves 122 can also be randomly distributed on the surface of the sliding section 120.
[0041] Further, in this embodiment, please refer to Figure 1 and Figure 2, in the same circumferential direction of the sliding section 120, multiple grooves 122 are evenly spaced. It can be understood that in any circumferential direction within the sliding section 120, multiple grooves 122 are evenly distributed, and at different axial positions of the sliding section 120, the spacing of multiple grooves 122 in the circumferential direction may be equal or unequal. In this embodiment, the spacing of multiple grooves 122 in any circumferential direction is equal. In this way, in any circumferential direction of the sliding section 120, the lubricant film is evenly distributed, avoiding the occurrence of excessive friction assistance during the rotation of the shaft 100, resulting in the bearing 200 or the shaft 100 heating up too quickly, or temperature differences in various places affecting the motor efficiency. Of course, in other embodiments, multiple grooves 122 can also form a group of groove groups along the circumference of the sliding section 120. In the same circumferential direction of the sliding section 120, multiple groove groups are evenly spaced, and the spacing between the groove groups is different from the spacing of the grooves 122 in the same groove group.
[0042] Further, in this embodiment, please refer to Figure 1 and Figure 2 , in the axial direction of the sliding section 120, multiple grooves 122 are evenly spaced. Referring to the evenly spaced distribution of multiple grooves 122 in the circumferential direction of the sliding section 120, it can be understood that in any axial direction of the sliding section 120, multiple grooves 122 are evenly distributed, and at different circumferential positions of the sliding section 120, the axial spacing of multiple grooves 122 can be equal or unequal. In this embodiment, the spacing of multiple grooves 122 in any axial direction is equal. In this way, in any axial direction of the sliding section 120, the oil film formed by the lubricant is evenly distributed, avoiding the problem of uneven friction in the axial direction of the rotating shaft 100 during the rotation of the rotating shaft 100, resulting in temperature differences in various axial locations of the sliding section 120 or the bearing 200, which affects the efficiency of the motor. Of course, in other embodiments, multiple grooves 122 form a groove group along the axial direction of the sliding section 120, and in the same axial direction of the sliding section 120, multiple groove groups are evenly spaced, and the spacing between the groove groups is different from the spacing of the grooves 122 in the same groove group.
[0043] Specifically, in this embodiment, please continue to refer to Figure 1 and Figure 2, the spacing between two adjacent grooves 122 in the circumferential direction is not greater than the spacing between two adjacent grooves 122 in the axial direction. It can be understood that the uniformity of the oil film formed by the lubricant in the axial direction of the sliding section 120 is less than the uniformity of the sliding section 120 in the circumferential direction. Due to the rotation of the rotating shaft 100, the force on the oil film in the circumferential direction is relatively large. In this way, the spacing between two adjacent grooves 122 in the axial direction is less than or equal to the spacing between two adjacent grooves 122 in the circumferential direction, which can effectively ensure the uniformity of the oil film, that is, the thickness of the oil film in various parts of the sliding section 120 is uniform, thereby avoiding the problem of uneven friction in the axial direction of the rotating shaft 100, thereby ensuring the efficiency of the motor. Of course, in other embodiments, the spacing between two adjacent grooves 122 in the circumferential direction may also be less than or equal to the spacing between two adjacent grooves 122 in the axial direction.
[0044] In one embodiment, please refer to Figure 1 and Figure 5 , in the axial direction of the rotating shaft 100, the length of the textured area 121 is greater than the length of the bearing 200. In this way, during the assembly process of the motor, it can be ensured that the textured area 121 on the sliding section 120 can cover the inner hole of the bearing 200, avoiding the textured area 121 from being completely radially opposite to the inner hole of the bearing 200 due to assembly errors, thereby ensuring the uniformity of the oil film between the sliding section 120 and the bearing 200, and effectively reducing the sliding friction between the two. Of course, in other embodiments, the length of the textured area 121 in the axial direction of the rotating shaft 100 can also be equal to the length of the bearing 200 in the axial direction.
[0045] The utility model also provides a motor, which includes a rotor 300 and a rotating shaft 100. The specific structure of the rotating shaft 100 refers to the above embodiment. Since the motor adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the mounting section 110 of the rotating shaft 100 is fixedly connected to the rotor 300, and the sliding section 120 is rotatably penetrated through the inner hole of the bearing 200.
[0046] In one embodiment, please refer to Figure 5The stator 400 or housing of the motor is provided with a sliding bearing 200, and the sliding section 120 is inserted into the inner hole of the sliding bearing 200 and is loosely matched with the sliding bearing 200. It can be understood that the rotating shaft 100 and the sliding bearing 200 are in sliding friction, and the textured area 121 is provided in the sliding section 120 to face the sliding bearing 200, which can ensure the stability of the oil film formed by the lubricant between the two, so as to reduce the sliding wear of the two and ensure the output power of the motor. In this way, the use of the sliding bearing 200 in a motor with a larger rotor 300 can reduce the noise of the motor and improve the output power of the motor. It should be noted that the motor is configured as an external stator motor, the stator 400 is integrally formed with the housing, and a stator structure is formed on the outer periphery of the rotor 300, so that the housing of the motor is also the iron core of the stator 400, and the bearing 200 is arranged on both the stator 400 and the housing; in another embodiment, the stator 400 and the housing are separately arranged, the housing is used to protect the rotor 300 and the stator 400 inside it, the stator 400 is fixedly connected to the housing, and the bearing 200 is arranged on the housing. Of course, in other embodiments, the motor can also be provided with a rolling bearing 200 on the stator 400 or the housing, and the sliding section 120 is penetrated through the inner ring of the rolling bearing 200.
[0047] Further, in this embodiment, please continue to refer to Figure 5 , the sliding section 120 and the sliding bearing 200 are both formed with a textured area 121 on the opposite sides. It can be understood that, under the action of the textured area 121, the stability of the oil film formed by the lubricant on the surface of the sliding section 120 and the oil film formed in the inner hole of the sliding bearing 200 are both improved. At the same time, when one of the textured area 121 of the sliding section 120 and the textured area 121 of the sliding bearing 200 fails, the other can still ensure the stability of the oil film formed by the lubricant between the sliding section 120 and the sliding bearing 200, thereby improving the use stability of the motor.
[0048] The utility model also proposes a refrigeration device, which includes a motor. The specific structure of the motor refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0049] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A rotating shaft, characterized in that: Applied to a motor, the stator or housing of the motor is provided with a bearing, and the rotating shaft comprises: a mounting section connected to a rotor of the motor; and A sliding section is arranged adjacent to the mounting section, the sliding section is configured as two and is arranged at the axial ends of the mounting section, the sliding section is used to be rotatably passed through the bearing, and a textured area is provided on the surface of at least one of the two sliding sections, and the textured area can place lubricant from the surface of the sliding section toward the inside.
2. The rotating shaft according to claim 1, characterized in that: The textured area is continuously distributed in the circumferential direction of the sliding segment.
3. The rotating shaft according to claim 1, characterized in that: The textured area includes a plurality of grooves distributed in an array, and the plurality of grooves are concavely formed from the surface of the sliding section.
4. The rotating shaft according to claim 3, characterized in that: In the same circumferential direction of the sliding section, a plurality of the grooves are evenly spaced and distributed.
5. The rotating shaft according to claim 4, characterized in that: In the axial direction of the sliding section, the plurality of grooves are evenly spaced and distributed; And / or, a distance between two adjacent grooves in the circumferential direction is not greater than a distance between two adjacent grooves in the axial direction.
6. The rotating shaft according to any one of claims 1 to 5, characterized in that: In the axial direction of the rotating shaft, the length of the textured area is greater than the length of the bearing.
7. A motor, characterized in that: The invention comprises a rotor and a rotating shaft according to any one of claims 1 to 6, wherein the rotating shaft is arranged on the rotor.
8. The motor according to claim 7, characterized in that The stator or housing of the motor is provided with a sliding bearing, and the sliding section is penetrated through the inner hole of the sliding bearing and is clearance-matched with the sliding bearing.
9. The motor according to claim 8, characterized in that The textured area is formed on opposite sides of the sliding section and the sliding bearing.
10. A refrigeration device, characterized in that: Comprising the electric machine as claimed in any one of claims 7 to 9.