Stator assembly for propeller motor and motor
By using rolling bearings and flange surface sliding bearings in the underwater thrust motor, the problem of insufficient rotation accuracy and axial thrust tolerance of the bearing system is solved, and the high precision and long-life operation of the motor is achieved.
Patent Information
- Application Number
- CN202422104760.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-28
AI Technical Summary
The bearing system of existing underwater thruster motors has insufficient rotational accuracy and axial thrust tolerance, resulting in increased wear and affecting the service life of the motor.
Rolling bearings are used to cooperate with sliding bearings with flange surfaces, rotating bearings are used to ensure rotational accuracy, and sliding bearings with flange surfaces are used to carry axial loads, so as to separate the axial loads from radial loads, and the assembly of rolling bearings is facilitated through a separate pipe structure.
It improves the service life of the bearing system, ensures the rotation accuracy of the motor and the durability of the bearing, and the separate structure is easy to assemble and extends the service life of the motor.
Smart Images
Figure CN223079857U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of underwater motors, and in particular to a stator assembly and a motor for a thruster motor. Background Art
[0002] Underwater thrusters require corresponding waterproof motors, and the bearings of such waterproof motors generally use only a single bearing system, that is, a sliding bearing system or a rolling bearing system made of composite materials. When a sliding bearing system is used, its rotation accuracy is poor, and the sliding bearing is in surface contact during rotation, and is prone to radial wear, which reduces the rotation accuracy after a period of use, causes scratches on the stator and rotor, and wears the waterproof coating or potting layer, affecting the life of the motor. When rolling bearings are used, since the underwater thruster is subjected to axial thrust during operation, and the rolling bearing is difficult to withstand axial thrust, it is easy to cause stress concentration on the ball and raceway, which intensifies raceway wear and even premature failure, affecting the service life of the motor. Utility Model Content
[0003] Based on this, it is necessary to provide a stator assembly and a motor for a thruster motor, and the specific technical solution is as follows.
[0004] A stator assembly for a thruster motor, comprising:
[0005] A first tube body, wherein a first axial hole extending in the axial direction is provided inside;
[0006] The stator seat comprises an end cover and a second tube body; the end cover is connected to the second tube body; a second axial hole extending in the axial direction is provided inside the second tube body; the first tube body is butted with the second tube body so that the first axial hole is aligned with the second axial hole to form a middle hole;
[0007] Rolling bearing, installed in the center hole;
[0008] Sliding bearings are installed at both ends of the central hole respectively; the sliding bearings include flange surfaces that abut against the end surfaces of the central hole.
[0009] Furthermore, the first axial hole includes a first sliding bearing chamber and a first rolling bearing chamber, the first sliding bearing chamber is equipped with a first sliding bearing, and the first rolling bearing chamber is equipped with a first rolling bearing; the second axial hole includes a second sliding bearing chamber and a second rolling bearing chamber, the first sliding bearing chamber is equipped with a second sliding bearing, and the second rolling bearing chamber is equipped with a second rolling bearing.
[0010] Furthermore, one end of the first sliding bearing chamber away from the first rolling bearing chamber is provided with a first positioning end face that fits the flange face; the aperture of the first rolling bearing chamber is larger than that of the first sliding bearing chamber, so that one end of the first rolling bearing chamber close to the first sliding bearing chamber is provided with a second positioning end face that fits the rolling bearing.
[0011] Furthermore, the end of the first pipe body is provided with a first mating spigot, the end of the second pipe body is provided with a second mating spigot, and the first mating spigot and the second mating spigot are in plug-in fit.
[0012] Furthermore, the end cover and the second pipe body are integrally formed.
[0013] Furthermore, it further includes a stator, and the stator is installed on the outer sides of the first pipe body and the second pipe body.
[0014] A motor for a thruster, comprising:
[0015] A stator assembly as described in any one of the above;
[0016] A rotor assembly, comprising a housing and a rotating shaft; the rotating shaft is connected to the middle of the housing, and the rotating shaft passes through the middle hole and is respectively fitted with a rolling bearing and a sliding bearing; the housing is rotatably sleeved on the outer side of the stator assembly.
[0017] Furthermore, a first wear-resistant gasket is provided between the first sliding bearing and the housing, and the rotating shaft passes through the first wear-resistant gasket; a second wear-resistant gasket is connected after the rotating shaft passes through the second sliding bearing.
[0018] Beneficial effects: For the stator assembly and the motor of a thruster motor provided by the present utility model, a rolling bearing is used in cooperation with a sliding bearing with a flange face. The rolling bearing ensures the rotation accuracy of the motor, and the sliding bearing with a flange face bears the axial load generated by thrust and the like, separating the axial load from the radial load, greatly improving the service life of the bearing system; and a split first pipe body and second pipe body are adopted, which is convenient for assembling the rolling bearing in the middle hole. Description of the Drawings
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] Figure 1 It is an exploded view of the stator assembly;
[0021] Figure 2It is a cross-sectional view of the stator assembly;
[0022] Figure 3 It is a schematic diagram of the cut-open first pipe body;
[0023] Figure 4 It is a schematic diagram of the cut-open stator base;
[0024] Figure 5 It is a disassembled schematic diagram of the motor;
[0025] Figure 6 It is a cross-sectional view of the motor.
[0026] Explanation of reference numerals: 100, stator assembly; 200, rotor assembly;
[0027] 1, first pipe body; 2, stator base; 3, first rolling bearing; 4, second rolling bearing; 5, first sliding bearing; 6, second sliding bearing; 7, housing; 8, rotating shaft; 9, first wear-resistant gasket; 10, second wear-resistant gasket;
[0028] 11, first sliding bearing chamber; 12, first rolling bearing chamber; 13, first positioning end face; 14, second positioning end face; 15, first mating rabbet;
[0029] 21, end cover; 22, second pipe body; 23, second sliding bearing chamber; 24, second rolling bearing chamber; 25, second mating rabbet; 26, wire outlet;
[0030] 101, set screw hole; 102, set screw. Detailed implementation manners
[0031] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0032] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.
[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0034] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0035] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0036] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.
[0037] Embodiment 1
[0038] Referring to Figure 1 As shown, this embodiment provides a stator assembly 100 for a thruster motor, including a first tube body 1, a stator base 2, a rolling bearing and a sliding bearing. The interior of the first tube body 1 is provided with a first shaft hole extending in the axial direction. The stator base 2 includes an end cover 21 and a second tube body 22, and the end cover 21 and the second tube body 22 are integrally formed. The interior of the second tube body 22 is provided with a second shaft hole extending in the axial direction; the first tube body 1 is docked with the second tube body 22 so that the first shaft hole and the second shaft hole are aligned to form a central hole for accommodating the rotating shaft 8 on the rotor to pass through. Referring to Figure 2 As shown, the rolling bearing is installed in the central hole, and the sliding bearing is installed at both ends of the central hole. The sliding bearing includes a flange surface that abuts against the end surface of the central hole.
[0039] During the assembly process, first install the rolling bearing inside the central hole, and then dock the first tube body 1 with the second tube body 22. After applying pressure with a press, the first tube body 1 and the second tube body 22 are completed for insertion docking.
[0040] A stator assembly 100 for a thruster motor and a motor provided in this embodiment adopt a combination of a rolling bearing and a sliding bearing with a flange surface. The rolling bearing is used to ensure the rotation accuracy of the motor, and the sliding bearing with a flange surface is used to bear the axial load generated by thrust and the like, so that the axial load and the radial load are separated, greatly improving the service life of the bearing system; and the first tube body 1 and the second tube body 22 are separated, which is convenient for assembling the rolling bearing in the central hole.
[0041] Specifically, referring to Figure 3 As shown, the first shaft hole respectively includes a first sliding bearing chamber 11 and a first rolling bearing chamber 12. A first sliding bearing 5 is installed in the first sliding bearing chamber 11, and a first rolling bearing 3 is installed in the first rolling bearing chamber 12; referring to Figure 4 As shown, the second shaft hole includes a second sliding bearing chamber 23 and a second rolling bearing chamber 24. A second sliding bearing 6 is installed in the first sliding bearing chamber 11, and a second rolling bearing 4 is installed in the second rolling bearing chamber 24.
[0042] In this embodiment, two first rolling bearings 3 are installed in the first shaft hole, and two second rolling bearings 4 are installed in the second shaft hole. In other embodiments, the number of rolling bearings can also be changed according to actual requirements.
[0043] Specifically, referring to Figure 3 As shown, one end of the first sliding bearing chamber 11 away from the first rolling bearing chamber 12 is provided with a first positioning end face 13 that fits the flange face; the aperture of the first rolling bearing chamber 12 is larger than that of the first sliding bearing chamber 11, so that one end of the first rolling bearing chamber 12 close to the first sliding bearing chamber 11 is provided with a second positioning end face 14 that fits the rolling bearing. Referring to Figure 4 As shown, corresponding rolling bearing positioning end faces and sliding bearing positioning end faces are also respectively provided on the stator base 2.
[0044] Specifically, the end of the first pipe body 1 is provided with a first mating stop 15, and the end of the second pipe body 22 is provided with a second mating stop 25, and the first mating stop 15 and the second mating stop 25 are in plug-in fit.
[0045] Specifically, the outer sides of the first pipe body 1 and the second pipe body 22 are respectively stator mating surfaces. After the first pipe body 1 and the second pipe body 22 are butted, the stator is installed on the outer sides of the first pipe body 1 and the second pipe body 22.
[0046] Specifically, in this embodiment, the end cover 21 is still provided with an outlet 26 for the stator wire to extend out.
[0047] In this embodiment, the rolling bearing can adopt a ceramic ball hybrid bearing, with the outer ring made of stainless steel and the inner ring made of ceramic balls to ensure radial rotation accuracy. The rolling bearing can also adopt a full stainless steel bearing or a full ceramic bearing, and a full ball type bearing can be used. The sliding bearing can be made of a graphite copper sleeve structure or other materials with a low friction coefficient such as pure graphite. The first pipe body 1 and the stator base 2 can be made of materials such as aerospace aluminum alloy, titanium alloy, and stainless steel.
[0048] Embodiment 2
[0049] Referring to Figure 5 As shown, this embodiment provides a motor for a thruster, including the stator assembly 100 and the rotor assembly 200 described in Embodiment 1. The rotor assembly 200 includes a housing 7 and a rotating shaft 8; the rotating shaft 8 is connected to the middle of the housing 7, and the rotating shaft 8 passes through the middle hole and is respectively fitted with rolling bearings and sliding bearings; the housing 7 is rotatably sleeved outside the stator assembly 100.
[0050] Specifically, a first wear-resistant gasket 9 is provided between the first sliding bearing 5 and the housing 7, and the rotating shaft 8 passes through the first wear-resistant gasket 9; a second wear-resistant gasket 10 is connected after the rotating shaft 8 passes through the second sliding bearing 6. Thereby reducing wear. A set screw thread hole 101 is provided on the second wear-resistant gasket 10. After the stator assembly 100 and the rotor assembly 200 are assembled, the rotating shaft 8 passes through the hollow and is inserted into the second wear-resistant gasket 10, and the set screw 102 is screwed into the set screw thread hole 101 to prevent the rotor assembly 200 from loosening.
[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0052] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.
Claims
1. A stator assembly for a thruster motor, characterized in that, Comprising: A first tube body, internally provided with a first axial hole extending axially; A stator base, comprising an end cover and a second tube body; the end cover is connected to the second tube body; the second tube body is internally provided with a second axial hole extending axially; the first tube body is butted against the second tube body so that the first axial hole and the second axial hole are aligned to form a central hole; A rolling bearing, installed in the central hole; A sliding bearing, sliding bearings are respectively installed at both ends of the central hole; the sliding bearing comprises a flange surface abutted against the end face of the central hole.
2. The stator assembly for a thruster motor according to claim 1, characterized in that, The first axial hole comprises a first sliding bearing chamber and a first rolling bearing chamber, a first sliding bearing is installed in the first sliding bearing chamber, and a first rolling bearing is installed in the first rolling bearing chamber; the second axial hole comprises a second sliding bearing chamber and a second rolling bearing chamber, a second sliding bearing is installed in the first sliding bearing chamber, and a second rolling bearing is installed in the second rolling bearing chamber.
3. The stator assembly for a thruster motor according to claim 2, characterized in that, One end of the first sliding bearing chamber away from the first rolling bearing chamber is provided with a first positioning end face fitting with the flange surface; the aperture of the first rolling bearing chamber is larger than that of the first sliding bearing chamber, so that one end of the first rolling bearing chamber close to the first sliding bearing chamber is provided with a second positioning end face fitting with the rolling bearing.
4. A stator assembly for a thruster motor according to claim 1, characterized in that, The end of the first tube body is provided with a first mating rabbet, the end of the second tube body is provided with a second mating rabbet, and the first mating rabbet and the second mating rabbet are in plug-in fit.
5. A stator assembly for a thruster motor according to claim 1, characterized in that, The end cover and the second tube body are integrally formed.
6. The stator assembly for a thruster motor according to claim 1, wherein Further comprising a stator, the stator is installed outside the first tube body and the second tube body.
7. A motor for a thruster, characterized in that, Comprising: The stator assembly according to any one of claims 1 to 6; A rotor assembly, comprising a housing and a rotating shaft; the rotating shaft is connected to the middle of the housing, and the rotating shaft passes through the central hole and is respectively matched with the rolling bearing and the sliding bearing; the housing is rotatably sleeved outside the stator assembly.
8. A motor for a thruster according to claim 7, wherein, The sliding bearing is divided into a first sliding bearing and a second sliding bearing; a first wear-resistant gasket is provided between the first sliding bearing and the housing, and the rotating shaft passes through the first wear-resistant gasket; a second wear-resistant gasket is connected after the rotating shaft passes through the second sliding bearing.