Motor bearing water-cooled outer cover

Abstract

The utility model discloses a motor bearing water -cooling outer cover belongs to motor heat dissipation technical field. It aims at solving the technical problem of not comprehensive, on -the -spot maintenance difficult of existing bearing cooling structure cooling. Water -cooling outer cover includes: at least two detachable combination's annular cover body subassembly, the cover body subassembly combination is used for setting in the periphery of motor bearing, wherein, every one cover body subassembly all is equipped with independent internal cooling water channel, and the water inlet and water outlet that communicates respectively with two ends of cooling water channel. When installing, two cover body subassembly are folded from motor axle both sides and fixed, form a annular water -cooling device that is close to bearing outer ring. The core advantage of the utility model lies in its split structure, so that the installation and disassembly of water -cooling outer cover can be radial, need not pass through motor axle end, greatly simplifies on -the -spot maintenance process, shortens the downtime. Meanwhile, this structure can carry out direct, comprehensive cooling to bearing, and the heat dissipation efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing and heat dissipation technology. Specifically, it relates to a cooling structure for high-speed motor bearings, particularly a split-type water-cooled outer cover for motor bearings that is easy to maintain on-site. Background Technology

[0002] When an electric motor is running at high speed, its bearings generate a large amount of heat due to high-speed friction. If this heat cannot be dissipated in a timely and effective manner, the bearing temperature will become too high, which will not only accelerate the aging and failure of the lubricating grease, but also seriously shorten the service life of the bearings, and even cause irreversible damage to the entire motor, affecting the continuity and stability of production.

[0003] Currently, there are various heat dissipation solutions for motor bearings. One common solution is to directly cool the motor end cover. However, this method involves a long heat transfer path and usually only indirectly dissipates heat to a portion of the bearing's outer ring. The heat dissipation area is limited, and the cooling efficiency is low, making it difficult to meet the heat dissipation requirements of high-load, high-speed motors.

[0004] To address the aforementioned problems, existing technologies have made some improvements, such as the "Rapid Cooling Device for the Bearing Seat of the Furnace Roller Conveyor in a Hot-Rolled Strip Steel Production Line" disclosed in Chinese Patent Document CN102494038A. This solution integrates the bearing seat and bearing cover into a single structure, and creates an annular cooling water groove inside the bearing seat. The groove is sealed by welding a steel sleeve, thereby achieving circumferential cooling of the entire bearing and increasing the cooling area. However, this integrated structure has an inherent drawback: its installation and disassembly must be performed at the end of the motor shaft. That is, other components connected to the motor shaft must be disassembled before the entire bearing seat can be slid out axially. When the motor is already installed on large equipment or in a confined space, this disassembly and assembly method becomes extremely difficult, or even impossible, leading to exceptionally cumbersome and time-consuming on-site maintenance and replacement work.

[0005] In view of the above problems, there is an urgent need for a split-type water-cooled cover for motor bearings that is easy to maintain on site. Utility Model Content

[0006] In view of this, this application provides a water-cooled outer cover for motor bearings. The main purpose is to solve the technical problems of difficult motor disassembly and assembly and poor cooling effect in the prior art.

[0007] According to a first aspect of the present invention, a water-cooled outer cover for cooling a motor bearing is provided. The water-cooled outer cover includes at least two detachable and combinable annular cover assemblies, which are assembled and used to be fitted around the motor bearing. Each cover assembly is provided with an independent internal cooling water channel, and an inlet and an outlet respectively connected to both ends of the internal cooling water channel.

[0008] Furthermore, as a preferred embodiment of this utility model, the cover assembly consists of two semi-circular covers with mirror-symmetrical structures. This "split-type" design is the core of this utility model, allowing the installation and removal of the water-cooled outer cover to be performed radially without passing through the end of the motor shaft, fundamentally solving the problem of difficult on-site maintenance of existing integral structures.

[0009] Furthermore, the internal cooling water channel is formed by a groove formed on the inner wall of the cover assembly and a cover plate that is sealed and fixed to the opening of the groove. This structure of the present application is easy to manufacture, and by fully welding the cover plate to the groove, the sealing performance of the internal cooling water channel can be reliably guaranteed.

[0010] Furthermore, the cover plate is sealed and fixed to the cover assembly by welding or integral molding. Since the split structure is not convenient to use traditional skeleton oil seals, the use of labyrinth seals can effectively prevent the lubricating grease inside the bearing from seeping out during motor operation.

[0011] Furthermore, the inner circumferential surface of the cover assembly is provided with a labyrinth sealing structure.

[0012] Furthermore, the cover assembly is provided with mounting through holes for fixing it to the motor end cover.

[0013] Furthermore, the cover assembly is also provided with a mounting stop for concentric positioning with the motor end cover.

[0014] Furthermore, both the inlet and the outlet are provided with internal threads or quick-connect fittings for connecting external cooling water pipes.

[0015] Furthermore, the end face of the semi-circular cover is provided with a set screw hole for ejecting the cover from the motor end cover.

[0016] According to a second aspect of the present invention, an electric motor is provided, which includes a water-cooled outer cover for the motor bearing as described in the above-described invention.

[0017] This utility model provides a water-cooled outer cover for motor bearings. The split-type structure of the water-cooled outer cover allows for radial installation and removal, eliminating the need to disassemble other components such as the coupling on the motor shaft for replacement or maintenance. This significantly simplifies the maintenance process for already installed motors, reduces downtime, and lowers maintenance costs. The water-cooled outer cover is installed close to the outer ring of the bearing, with internal cooling water channels surrounding the bearing, allowing the cooling water to directly and efficiently remove the heat generated by the bearing. Compared to solutions that only cool the end cover, this utility model offers a shorter heat dissipation path and more direct and comprehensive cooling.

[0018] In addition, each independent cover assembly is equipped with inlet and outlet ports, allowing the cooling water pipes of multiple water-cooled outer covers (such as the motor drive end and non-drive end) to be easily connected in series or parallel according to site conditions, resulting in high flexibility in pipe layout. By fully welding the water channel cover plate to the cover body and using a labyrinth seal instead of a traditional oil seal, effective sealing of the cooling water circuit and lubricant is ensured, guaranteeing the safe and stable operation of the motor.

[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0020] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0021] In the attached diagram: Figure 1 This invention provides a schematic diagram of the overall structure of the water-cooled outer cover for motor bearings according to an embodiment of the present invention. Figure 2 This diagram shows a structural schematic of a single semi-circular cover of a water-cooled outer cover for a motor bearing provided in an embodiment of the present invention. Figure 3 A cross-sectional view of the internal cooling water channel portion of the water-cooled outer cover for motor bearings provided in an embodiment of the present invention is shown.

[0022] Icon labels: 1. Water-cooled outer cover; 11. Internal cooling water channel; 12. Cover plate; 13. Labyrinth seal structure; 14. Mounting through hole; 15. Mounting stop; 16. Top screw hole; 2. Water inlet; 3. Water outlet; 4. Quick connector.

[0023] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example The technical solution of this utility model will now be described in more detail with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1-3 As shown, this embodiment provides a preferred structure for a water-cooled outer cover 1 for a motor bearing. The water-cooled outer cover 1 is not a single, integral ring-shaped part, but rather a combination of two semi-circular covers with mirror-symmetrical structures. When installation is required, these two semi-circular covers are joined together from both sides of the motor shaft and secured with fasteners such as bolts, forming a complete annular water-cooling device that surrounds the motor bearing.

[0029] like Figure 2 and Figure 3As shown, each semi-circular cover is machined with an independent cooling system. Specifically, a groove of a certain depth is machined into the inner wall of each cover, forming the main body of the internal cooling water channel 11. Then, a matching cover plate 12 is placed over the opening of the groove. The cover plate 12 is preferably a metal cover plate, and the cover plate 12 is sealed and fixed to the cover by full welding, thereby forming a closed, leak-proof internal cooling water channel 11. Inlet and outlet ports 2 are welded to both ends of the internal cooling water channel 11. The inlet and outlet ports 2 are machined with internal threads for installing commercially available standard quick connectors 3 for quick connection to external cooling water pipes.

[0030] To ensure installation accuracy and stability, each semi-circular cover is provided with multiple mounting through holes 14 for bolts to pass through and secure the cover to the front and rear end covers of the motor. Simultaneously, the cover is also machined with mounting stops 15, which precisely fit with the mating stops on the motor end covers to ensure that the combined semi-circular covers are concentric with the motor shaft, preventing misalignment during installation.

[0031] Considering the split-type structural characteristics, this embodiment designs a labyrinth seal structure 13 on the inner circumferential surface of the cover, i.e., the side closest to the motor shaft. This structure, through a series of tortuous micro-gap joints, effectively prevents the grease in the bearing cavity from leaking outward when the motor rotates at high speed, thus playing the role of a traditional skeleton oil seal while also adapting to the split-type structure.

[0032] The installation and disassembly process of this utility model is extremely convenient. During installation, there is no need to disassemble any parts on the motor shaft. Simply align the two semi-circular covers with the mounting stops 15 on the motor end cover, close them together, and then tighten them with bolts through the mounting holes 14. Subsequently, screw the quick connector 3 into the inlet / outlet 3 and connect the cooling water pipe, and it is ready for use.

[0033] Disassembly follows the reverse process. After loosening the fastening bolts, the set screw can be screwed into the pre-drilled set screw hole 16 on the cover body, allowing the semi-circular cover body to be easily pushed out of the mating stop between it and the end cover, and then removed radially. The entire process does not require moving the motor or disassembling the motor shaft, achieving truly rapid on-site maintenance.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A water-cooled outer cover for motor bearings, used for cooling motor bearings, characterized in that, The water-cooled outer cover (1) includes: at least two detachable and combinable annular cover assemblies, which are used to be fitted around the motor bearing after being combined; Each of the cover components is provided with an independent internal cooling water channel (11), and an inlet (2) and an outlet (3) respectively connected to both ends of the internal cooling water channel (11).

2. The water-cooled outer cover for motor bearings according to claim 1, characterized in that, The cover assembly consists of two semi-circular covers with mirror-symmetrical structures.

3. The water-cooled outer cover for motor bearings according to claim 2, characterized in that, The internal cooling channel (11) is formed by a groove formed on the inner wall of the cover assembly and a cover plate (12) that is sealed and fixed to the opening of the groove.

4. The water-cooled outer cover for motor bearings according to claim 3, characterized in that, The cover plate (12) is sealed and fixed to the cover assembly by welding or integral molding.

5. The water-cooled outer cover for motor bearings according to claim 4, characterized in that, The inner circumferential surface of the cover assembly is provided with a labyrinth sealing structure (13).

6. The water-cooled outer cover for motor bearings according to claim 2, characterized in that, The cover assembly is provided with mounting through holes (14) for fixing it to the motor end cover.

7. The water-cooled outer cover for motor bearings according to claim 6, characterized in that, The cover assembly is also provided with a mounting stop (15) for concentric positioning with the motor end cover.

8. The water-cooled outer cover for motor bearings according to claim 7, characterized in that, Both the inlet (2) and the outlet (3) are provided with internal threads or quick connectors (4) for connecting external cooling water pipes.

9. The water-cooled outer cover for motor bearings according to claim 2, characterized in that, The end face of the semi-circular cover is provided with a set screw hole (16) for pushing the cover out from the motor end cover.

10. An electric motor, characterized in that, Includes the water-cooled outer cover for motor bearings as described in any one of claims 1-9 above.

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