Roller motor and roller motor bearing temperature measurement structure
By employing a labyrinth seal structure and a bearing temperature measuring device in the drum motor, the problems of easy bearing wear and frequent maintenance are solved, achieving motor bearing stability and accurate temperature detection, reducing maintenance costs, and making it suitable for explosion-proof and coal mine environments.
Patent Information
- Application Number
- CN202423010776.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-05
AI Technical Summary
The bearing seal structure of existing roller motors is prone to wear, which can lead to damage to the motor shaft, increase maintenance costs, and the skeleton oil seal needs to be replaced regularly, affecting product life and production stability.
The bearing adopts a labyrinth seal structure, which forms a tortuous gap through the annular protrusion and groove of the bearing outer cover moving ring and the outer cover stationary ring, avoiding direct contact between the bearing and the motor shaft. The bearing outer cover stationary ring is provided with mounting holes for bearing temperature measurement, simplifying the installation and testing of the temperature measurement device.
It achieves stability and reliability of the bearing sealing structure, reduces motor shaft wear and maintenance frequency, lowers costs, is suitable for explosion-proof applications, and provides accurate and reliable bearing temperature detection, meeting the safety requirements of special environments such as coal mines.
Smart Images
Figure CN223502694U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to the design of a drum motor and a temperature measuring structure for the drum motor bearing. Background Technology
[0002] Currently, the inner and outer end caps of the bearings of roller motors are sealed with skeleton oil seals. The skeleton oil seals are in contact with the motor shaft. Under long-term operation of the motor, the skeleton oil seals will cause irreversible wear on the motor shaft. In addition, the skeleton oil seals also need to be replaced and inspected regularly, which increases the cost of the roller motor. In severe cases, it will affect the service life of the product and cause irreversible losses such as production stoppage for customers. Utility Model Content
[0003] The main purpose of this utility model is to provide a drum motor with a reliable and stable bearing sealing structure, a motor shaft that is not easily worn and can be used for a long time, and a bearing temperature measurement structure that is accurate and low in cost.
[0004] This utility model embodiment proposes a drum motor, which includes a motor shaft and a drum housing located outside the motor shaft. A bearing and an end cover structure are sleeved on the motor shaft. The end cover structure includes an end cover body connected to the drum housing, a bearing outer cover moving ring connected to the end cover body, and a bearing outer cover fixed ring located inside the bearing outer cover moving ring and sealed to the bearing outer cover moving ring. There is a radial gap between the bearing outer cover moving ring and the motor shaft. A portion of the bearing outer cover fixed ring is inserted into the radial gap, and the bearing outer cover fixed ring is fixedly connected to the motor shaft.
[0005] In a specific embodiment, the bearing outer cover fixed ring and the bearing outer cover moving ring have a tortuous gap to form a labyrinth seal structure.
[0006] In a specific embodiment, one of the bearing outer cover fixed ring and the bearing outer cover moving ring is provided with an annular protrusion structure, and the other is provided with an annular groove structure. The annular protrusion structure and the annular groove structure cooperate to form the labyrinth seal structure.
[0007] In a specific embodiment, the bearing outer cover fixed ring is provided with an annular protrusion structure and an annular groove structure, and the bearing outer cover moving ring is provided with an annular groove structure and an annular protrusion structure. The annular protrusion structure of the bearing outer cover fixed ring and the annular groove structure of the bearing outer cover moving ring cooperate with each other to form a labyrinth seal structure.
[0008] In a specific embodiment, the end cover structure further includes a bearing inner cover connected to the end cover body, and the bearing inner cover and the motor shaft are arranged in a labyrinth seal.
[0009] In a specific embodiment, the bearing inner cover is provided with a bearing inner cover annular groove structure, and the bearing inner cover annular groove structure and the motor shaft form a bearing inner cover labyrinth seal structure.
[0010] In a specific embodiment, the roller shell, the bearing end cover body, the bearing outer cover rotating ring, and the bearing inner cover are fixedly connected by fasteners.
[0011] In a specific embodiment, the drum motor includes a bearing temperature measuring device. The part of the structure is provided with a mounting hole, and the bearing temperature measuring device passes through the mounting hole and contacts the bearing for bearing temperature measurement.
[0012] In a specific embodiment, the mounting hole is a threaded hole, and the outer wall of the temperature measuring device is provided with a threaded structure that matches the threaded hole.
[0013] In a specific embodiment, the drum motor is an explosion-proof drum motor, which is used in the explosion-proof field.
[0014] This utility model embodiment also proposes a bearing temperature measurement structure for a drum motor. This bearing temperature measurement structure is applied to the drum motor of the above embodiment. The bearing outer cover of the drum motor is provided with a mounting hole, and a bearing temperature measuring device passes through the mounting hole and contacts the bearing for bearing temperature measurement.
[0015] The roller motor proposed in this utility model has an end cover structure comprising a rotating outer ring and a stationary outer ring of the bearing cover disposed on the outer side of the bearing. A radial clearance exists between the rotating outer ring and the motor shaft. A portion of the stationary outer ring is inserted into the radial clearance, and the stationary outer ring is fixedly connected to the motor shaft. During long-term operation, the rotating rotating outer ring will not directly contact the motor shaft, reducing wear and tear on the motor shaft and minimizing damage to the bearing end cover. The bearing sealing structure formed by the rotating and stationary outer rings is stable and reliable, eliminating the need for seal replacement and significantly reducing the frequency of after-sales service for the roller motor. Furthermore, it is simple to manufacture and low in cost, making it particularly suitable for use in explosion-proof applications such as coal mines. The bearing temperature measuring structure is installed in the mounting hole of the portion of the stationary outer ring that is inserted into the radial clearance. The bearing temperature measuring device penetrates the mounting hole and contacts the bearing for temperature measurement. This simple and easy-to-manufacture bearing temperature measuring structure allows direct contact with the bearing without intermediate media, ensuring accurate bearing temperature detection. It also meets the requirements for use in special environments such as underground coal mines, preventing explosion failure and offering advantages such as safety, reliability, and low cost. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0017] Figure 1 This is a partial schematic diagram of the drum motor in an embodiment of this utility model.
[0018] Figure 2 This is a partial cross-sectional view of the outer ring of the bearing outer cover in an embodiment of this utility model.
[0019] Figure 3 This is a partial cross-sectional view of the bearing outer cover retaining ring in an embodiment of this utility model.
[0020] Figure 4 This is a partial cross-sectional view of the bearing inner cover in an embodiment of this utility model.
[0021] Explanation of icon numbers:
[0022] label name label name 100 Drum motor 304 Bearing inner cover 10 motor shaft 3033 Mounting holes 20 Drum housing 50 Bearing temperature measuring device 30 End cap structure 3031 Annular protrusion structure of bearing outer cover locating ring 301 End cap body 3032 Annular groove structure of bearing outer cover locating ring 302 Bearing outer cover dynamic ring 3021 Annular groove structure of bearing outer cover moving ring 303 Bearing outer cover and retaining ring 3022 Annular protrusion structure of bearing outer cover moving ring 40 bearings 3041 Annular groove structure of bearing inner cover
[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0026] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] like Figure 1-4 As shown in the figure, this utility model embodiment proposes a drum motor 100, which includes a motor shaft 10 and a drum housing 20 located outside the motor shaft 10. A bearing 40 and an end cap structure 30 are fitted onto the motor shaft 10. The end cap structure includes an end cap body 301 connected to the drum housing 20, a bearing outer cap moving ring 302 connected to the end cap body 301, and a bearing outer cap fixed ring 303 located inside the bearing outer cap moving ring 302 and sealingly disposed therewith. A radial gap exists between the bearing outer cap moving ring 302 and the motor shaft 10. A portion of the bearing outer cap fixed ring 303 is inserted into the radial gap, and the bearing outer cap fixed ring 303 is fixedly connected to the motor shaft 10. Specifically, the bearing outer cap fixed ring 303 is fixed to the motor shaft 10 by a heat-shrink method. In other embodiments, other connection methods can also be used, as long as a fixed connection is achieved between the two. With the fixing method in this embodiment, the rotating bearing outer cover moving ring 302 does not directly contact the motor shaft 10, preventing the problem of motor shaft wear due to long-term motor operation.
[0029] In the above embodiments, during long-term operation of the drum motor 100, the rotating bearing outer cover moving ring 302 will not directly contact the motor shaft 10, making the motor shaft 10 less prone to wear and the bearing end cover 30 less prone to damage. The bearing sealing structure composed of the bearing outer cover moving ring 303 and the bearing outer cover fixed ring 303 is stable and reliable, and there is no need to replace the seals, which greatly reduces the after-sales frequency of the drum motor. Moreover, it is simple to process and has low cost, making it especially suitable for use in explosion-proof fields such as coal mines.
[0030] like Figure 1As shown, it can be understood that a labyrinth seal structure is formed between the bearing outer cover moving ring 302 and the bearing outer cover stationary ring 303, with a tortuous gap between them. For example, one of the bearing outer cover stationary ring 303 and the bearing outer cover moving ring 302 is provided with an annular protrusion structure, and the other is provided with an annular groove structure. The annular protrusion structure and the annular groove structure cooperate to form a tortuous gap. Figure 1-3 In the embodiment, the bearing outer cover fixed ring 303 is provided with a bearing outer cover fixed ring annular protrusion structure 3031 and a bearing outer cover fixed ring annular groove structure 3032, and the bearing outer cover moving ring is provided with a bearing outer cover moving ring annular groove structure 3021 and a bearing outer cover moving ring annular protrusion structure 3022 that cooperate with the bearing outer cover fixed ring 303. It can be understood that each groove structure and each protrusion structure cooperate with each other in an insertion manner so that the bearing outer cover moving ring 302 and the bearing outer cover fixed ring 303 cooperate to form a labyrinth seal structure.
[0031] In this embodiment, the end cover structure also includes a bearing inner cover 304 connected to the end cover body 301, and the bearing inner cover 304 and the motor shaft 10 are also arranged in a labyrinth seal.
[0032] Understandably, the bearing outer cover fixed ring 303, the bearing outer cover moving ring 302, the bearing inner cover 304, and the bearing end cover body 301 together constitute the bearing chamber. Except for the bearing outer cover fixed ring 303, the bearing end cover body 301, the bearing outer cover moving ring 302, the bearing inner cover, and the drum housing 20 are fastened together by fasteners, such as screws. When the drum housing 20 rotates, it can drive the end cover body 301, the bearing outer cover moving ring 302, and the bearing inner cover to rotate together; that is, the end cover body 301, the bearing outer cover moving ring 302, the bearing inner cover, and the drum housing 20 rotate synchronously. The screw fastening facilitates the disassembly of each component.
[0033] like Figure 4 As shown, the bearing inner cover 304 is provided with an annular groove structure 3041, specifically, the groove structure 3041 consists of three semi-circular grooves. The annular groove structure 3041, in conjunction with the motor shaft 10, also forms a labyrinth seal structure for the bearing inner cover. This structure ensures a stable and reliable sealing structure inside the roller motor bearing 40, eliminating the need to replace the seals during long-term operation of the roller motor 100. Furthermore, the motor shaft 10 is less prone to wear, significantly reducing the frequency of after-sales service for the roller motor 100. The manufacturing process is also simple and cost-effective. It is particularly suitable for use in explosion-proof applications such as coal mines.
[0034] Understandably, the working principle of a labyrinth seal is to reduce media leakage through a series of tortuous channels and gaps. A labyrinth seal consists of rotating and stationary parts, with numerous tortuous chambers between these parts, creating a throttling effect as the media passes through, thereby achieving the purpose of preventing leakage. In this embodiment, the rotating parts include the bearing outer cover rotating ring 302 and the bearing inner cover 304, while the stationary parts include the bearing outer cover stationary ring 303 and the motor shaft 10.
[0035] like Figure 1 As shown in this embodiment of the present invention, the drum motor 100 also includes a bearing temperature measuring device 50. A portion of the bearing outer cover retaining ring 303 is inserted into the radial gap, and this portion of the structure has a mounting hole 3033. The bearing temperature measuring device is inserted from the outside into the mounting hole 3033 and passes through the mounting hole 3033 to contact the bearing 40 for temperature measurement. The bearing temperature measuring structure in this embodiment is simple and easy to manufacture. After passing through the mounting hole, the bearing temperature measuring device 50 can directly contact the bearing 40 without passing through any other intermediate medium. Its bearing temperature detection is accurate and meets the requirements for use in special environments such as underground coal mines. It will not cause explosion failure and has the characteristics of safety, reliability, and low cost. In this embodiment, the bearing outer cover retaining ring 303 is fixed to the motor shaft 10. During the operation of the drum motor 100, the bearing outer cover retaining ring 303 and the motor shaft 10 are fixed, which makes it easier to install and use the bearing temperature measuring device 50.
[0036] Specifically, the mounting hole 3033 is a threaded hole, and the outer wall of the temperature measuring device 50 is provided with a threaded structure that matches the threaded hole. The two are fixedly connected by threads, so that the probe of the temperature measuring device can contact the bearing to detect the bearing temperature, so as to monitor the bearing temperature and ensure the stable operation of the motor. When the bearing temperature is too high, the motor will also stop running and will resume operation after the fault is eliminated.
[0037] Understandably, the drum motor 100 in this embodiment can specifically be an explosion-proof drum motor 100, and the setting of its bearing temperature measuring structure can also meet the requirements for motor bearing temperature detection in explosion-proof fields such as coal mines.
[0038] This embodiment of the invention also proposes a bearing temperature measurement structure for a drum motor 100. Applied to the drum motor 100 described in the above embodiments, the bearing outer cover retaining ring 303 of the drum motor 100 has a mounting hole 3033 on the part of the structure where it inserts into the radial clearance. A bearing temperature measuring device 50 passes through the mounting hole 3033 and contacts the bearing 40 for bearing temperature measurement. The bearing temperature measuring structure in this embodiment is simple and easy to manufacture. The bearing temperature measuring device 50 can directly contact the bearing without any intermediate medium, ensuring accurate bearing temperature detection. It also meets the requirements for use in special environments such as underground coal mines, preventing explosions and possessing characteristics of safety, reliability, and low cost. In this embodiment, the bearing outer cover retaining ring 303 is fixed to the motor shaft 10. During the operation of the drum motor 100, the bearing outer cover retaining ring 303 and the motor shaft 10 remain stationary, which facilitates the installation and use of the bearing temperature measuring device 50.
[0039] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
Claims
1. A roller motor, the roller motor comprising a motor shaft and a roller housing located outside the motor shaft, wherein a bearing and an end cap structure are sleeved on the motor shaft, characterized in that, The end cover structure includes an end cover body connected to the drum housing, a bearing outer cover moving ring connected to the end cover body, and a bearing outer cover fixed ring located inside the bearing outer cover moving ring and sealed to the bearing outer cover moving ring. There is a radial gap between the bearing outer cover moving ring and the motor shaft. A portion of the bearing outer cover fixed ring is inserted into the radial gap and the bearing outer cover fixed ring is fixedly connected to the motor shaft.
2. The drum motor according to claim 1, characterized in that, The fixed ring of the bearing outer cover and the moving ring of the bearing outer cover have a tortuous gap to form a labyrinth seal structure.
3. The drum motor according to claim 2, characterized in that, One of the bearing outer cover fixed ring and the bearing outer cover moving ring is provided with an annular protrusion structure, and the other is provided with an annular groove structure. The annular protrusion structure and the annular groove structure cooperate to form the labyrinth seal structure.
4. The drum motor according to claim 2, characterized in that, The bearing outer cover fixed ring is provided with an annular protrusion structure and an annular groove structure, and the bearing outer cover moving ring is provided with an annular groove structure and an annular protrusion structure. The annular protrusion structure of the bearing outer cover fixed ring and the annular groove structure of the bearing outer cover moving ring cooperate with each other to form a labyrinth seal structure.
5. The drum motor according to claim 2, characterized in that, The end cover structure also includes a bearing inner cover connected to the end cover body, and the bearing inner cover and the motor shaft are arranged in a labyrinth seal.
6. The drum motor according to claim 5, characterized in that, The bearing inner cover is provided with an annular groove structure, and the annular groove structure and the motor shaft form a maze seal structure for the bearing inner cover.
7. The drum motor according to claim 6, characterized in that, The drum shell, bearing end cover body, bearing outer cover rotating ring, and bearing inner cover are fixedly connected by fasteners.
8. The drum motor according to claim 1, characterized in that, The drum motor includes a bearing temperature measuring device. The part of the structure is provided with a mounting hole, and the bearing temperature measuring device passes through the mounting hole and contacts the bearing for bearing temperature measurement.
9. The drum motor according to claim 8, characterized in that, The mounting hole is a threaded hole, and the outer wall of the temperature measuring device is provided with a threaded structure that matches the threaded hole.
10. The drum motor according to any one of claims 1-9, characterized in that, The roller motor is an explosion-proof roller motor, used in explosion-proof fields.
11. A temperature measuring structure for a roller motor bearing, characterized in that, Applied to the drum motor as described in any one of claims 1-10, the bearing outer cover of the drum motor is provided with a mounting hole in the part of the structure into which the radial clearance is inserted, and a bearing temperature measuring device passes through the mounting hole and contacts the bearing for bearing temperature measurement.