Water-cooled servo motor

Abstract

The utility model discloses a water -cooling servo motor, including motor casing, first end cover, second end cover, semiconductor refrigeration plate, water -cooling cavity, communicating hole, joint and inner runner. The inner wall of motor casing is equipped with a plurality of inner runner that is annularly arranged, and the inner side of end cover is equipped with water -cooling cavity, and the inner side is installed with semiconductor refrigeration plate, and the refrigeration face is towards the motor inside, and the heating face is towards water -cooling cavity one side. The outer periphery of semiconductor refrigeration plate is equipped with communicating hole and is communicated with water -cooling cavity, is used for carrying out heat exchange. The inner runner is communicated with water -cooling cavity, and constitutes liquid cooling circulation channel, and the outer of end cover is equipped with the joint for connecting the outside cooling pipeline. The utility model discloses the integrated arrangement of semiconductor refrigeration and liquid cooling channel, realizes motor double -end cooling and internal heat rapid export, possesses compact structure, temperature control fast, heat dissipation efficiency higher advantage, is applicable to high accuracy, high load servo application scene.

Description

Technical Field

[0001] This utility model relates to the field of servo motor technology, specifically a water-cooled servo motor. Background Technology

[0002] With the development of industrial automation and high-precision control technology, servo motors are widely used as actuators in CNC equipment, robots, automated production lines, and other fields. Because servo motors operate under complex conditions such as high speed, high load, and frequent start-stop, they generate a lot of heat during operation. If heat dissipation is not timely, the motor temperature will rise too high, which will affect the winding insulation performance, electrical control stability, and overall service life.

[0003] Currently, common servo motor cooling methods mainly include natural air cooling and external water jacket cooling. Air cooling is simple in structure but has low cooling efficiency, making it difficult to meet the continuous heat dissipation requirements of medium- to high-power devices. Water-cooled motors typically use a cooling water jacket or water pipe channels outside the motor housing, allowing coolant to flow along the casing to carry away heat. However, this type of structure has the following typical problems: Weak thermal coupling between end cap and housing: In existing technologies, end caps are mostly single casting structures that do not participate in effective cooling cycles. Heat is mainly concentrated in the center of the motor and is difficult to release fully at the end, resulting in heat accumulation.

[0004] Dispersed cooling path layout: The cooling systems of the shell and end cap are independent of each other, the liquid circuit structure is fragmented, which easily creates cooling dead zones, resulting in low heat transfer efficiency and difficulty in achieving rapid and balanced heat distribution.

[0005] The integration of semiconductor thermal control is challenging: As the demand for precise temperature control in servo motor control systems increases, how to efficiently couple semiconductor thermal control modules with liquid cooling structures has become a major technical bottleneck. Existing structures lack closely matched heat conduction channels and liquid cooling circulation paths.

[0006] Based on the above issues, existing servo motor cooling structures still have significant room for improvement in terms of thermal management efficiency, structural compactness, and temperature control accuracy. Therefore, there is an urgent need for a novel water-cooled servo motor structure with high structural integration, optimized cooling paths, strong heat conduction efficiency, and both internal and external cooling capabilities. This would effectively address the aforementioned shortcomings in existing technologies and improve the long-term reliability and thermal stability of the motor. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted by this utility model is as follows: a water-cooled servo motor, including a motor housing, a first end cover, a second end cover, a semiconductor cooling plate, a water-cooling cavity, a connecting hole, a connector, and internal flow channels, forming a closed and efficient liquid cooling circulation system. The motor housing is an integrally molded structure, serving as an overall load-bearing frame, and its inner side has multiple circumferentially arranged internal flow channels for constructing the internal liquid cooling path.

[0009] Specifically, the internal flow channel is connected to the end cover water-cooling cavity, which enables the coolant to circulate inside the motor, effectively removing the heat generated by the windings and controller, and improving the overall cooling uniformity and efficiency.

[0010] In a preferred embodiment, the first end cover and the second end cover are symmetrically disposed at both ends of the motor housing. They have the same structure and both have a water-cooling cavity on their inner side, and a semiconductor cooling plate is fixedly installed thereon.

[0011] Specifically, this symmetrical structure ensures that heat is evenly distributed at both ends of the motor, avoiding localized overheating at the ends and improving the thermal stability of the motor.

[0012] In a preferred embodiment, the semiconductor cooling plate is further configured such that the cooling surface faces the inside of the motor housing, the heating surface faces the corresponding water-cooling cavity, and multiple connecting holes are opened on its outer periphery to form a liquid flow channel with the water-cooling cavity.

[0013] Specifically, the structure rapidly conducts heat from inside the shell to the water-cooled cavity through the thermoelectric effect, and then removes it through coolant circulation, thereby achieving rapid temperature control and energy transfer.

[0014] In a preferred embodiment, the plurality of internal flow channels are further configured such that they are structurally distributed along the axial direction of the motor housing, and the inner wall is designed as a corrugated curved structure to increase the cooling area and turbulence intensity.

[0015] Specifically, the corrugated structure helps break the boundary layer, improves the coolant convection efficiency, further enhances the cooling effect, and improves the overall heat dissipation capacity.

[0016] In a preferred embodiment, the first end cover, the second end cover, and the semiconductor cooling plate are all provided with shaft holes in the middle, through which the motor shaft passes, and the first end cover and the second end cover are provided with shaft seals, one end of which is sleeved inside the shaft hole of the semiconductor cooling plate.

[0017] Specifically, this structure prevents coolant from leaking into the motor cavity, ensuring motor operation safety and sealing reliability.

[0018] In a preferred embodiment, the motor housing is further configured such that a plurality of heat dissipation fins are provided on the outer side of the motor housing, which are evenly arranged along the axial direction.

[0019] Specifically, the heat dissipation fins significantly increase the surface area of ​​the motor, enhance the natural convection heat transfer effect, provide an auxiliary heat dissipation path for the liquid cooling system, and improve the heat dissipation redundancy under extreme operating conditions.

[0020] In summary, the water-cooled servo motor provided by this utility model integrates semiconductor cooling, internal flow channels, dual-end water cooling and external heat dissipation structure to build an efficient, closed and fast-response thermal management system, which significantly improves cooling efficiency, heat conduction rate and system stability. It is particularly suitable for high-performance servo drive equipment under high load, high precision and long-term continuous operation conditions, and has broad engineering application value and promotion prospects.

[0021] The beneficial effects achieved by this utility model are as follows: 1. The first end cover and the second end cover of this utility model have the same structural design, and both are fixedly installed with semiconductor cooling plates on their inner sides. Combined with the arrangement of the annular water cooling cavity and the connecting hole, bidirectional cooling and rapid heat transfer can be achieved, which can significantly improve the cooling efficiency and heat dissipation balance of the servo motor and extend the service life of the device.

[0022] 2. In this utility model, the motor housing is provided with multiple corrugated inner channels arranged in a ring, and a heat dissipation fin structure is provided on the outside of the housing. Through the internal and external heat dissipation method, the heat dissipation surface area and thermal conductivity are effectively improved, the overall operating temperature rise is reduced, and the thermal stability and reliability of the servo motor are enhanced in high-load and high-frequency application scenarios. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of one embodiment of the present invention; Figure 3 This is a schematic diagram of the relative structure of the motor housing and the second end cover according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the second end cap structure according to an embodiment of the present invention.

[0024] Figure label: 100, Motor housing; 110, Inner flow channel; 200, First end cover; 210, Connector; 300, Second end cover; 310, Semiconductor cooling plate; 301, Water cooling cavity; 302, Connecting hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0026] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0027] The following describes, with reference to the accompanying drawings, some embodiments of a water-cooled servo motor provided by this utility model.

[0028] Combination Figures 1-4 As shown, the present invention provides a water-cooled servo motor, including: a motor housing 100, a first end cover 200, a second end cover 300, a semiconductor cooling plate 310, a water-cooling cavity 301, a connecting hole 302, a connector 210, and an inner flow channel 110, etc., forming an integrated, highly efficient closed thermal management system.

[0029] The motor housing 100 is a one-piece cast structure, cylindrical in shape, hollow inside, and used to house the motor stator and rotor assembly. On the inner wall of the motor housing 100, there are multiple circumferentially spaced internal flow channels 110. These internal flow channels 110 are arranged in a ring-shaped circumferential distribution, and their channel direction is parallel to the axis of the motor housing 100, forming an axial flow path for the coolant.

[0030] Preferably, the inner wall of the inner flow channel 110 is designed with a corrugated curve and has a periodic undulating structure to increase the degree of coolant turbulence, expand the heat exchange area, and thus significantly improve the heat convection efficiency. The two ends of the inner flow channel 110 are respectively connected to the water-cooling cavity 301 on the first end cover 200 and the second end cover 300, forming a closed loop circulation channel.

[0031] The first end cap 200 and the second end cap 300 are symmetrically arranged at both ends of the motor housing 100 and are coaxially and sealed together. The first end cap 200 and the second end cap 300 have the same structure, and both are provided with annular water-cooling chambers 301 for circulating coolant, which are connected to the inner flow channel 110 on the motor housing 100.

[0032] A semiconductor cooling plate 310 is fixedly installed on the inner side of both the first end cover 200 and the second end cover 300. The cooling surface of the semiconductor cooling plate 310 faces the inner side of the motor housing 100 (i.e., close to the motor windings and stator), while its heating surface faces the corresponding water-cooled cavity 301, forming a thermal separation structure. The cooling surface is used to absorb the heat generated during the operation of the motor, while the heating surface exchanges heat with the coolant in the water-cooled cavity 301 through heat conduction.

[0033] The outer periphery of the semiconductor cooling plate 310 is provided with a plurality of connecting holes 302, which are used to connect its main body structure with the water cooling cavity 301, thereby further increasing the heat exchange contact area and improving the heat exchange rate.

[0034] The outer surfaces of the first end cap 200 and the second end cap 300 are respectively provided with connectors 210. The connectors 210 are connected to the external circulation pipeline of the water cooling system, which can realize the injection and discharge of coolant and form a closed cooling channel.

[0035] The first end cap 200, the second end cap 300, and the semiconductor cooling plate 310 all have shaft holes at their center for the motor shaft to pass through. Preferably, a shaft seal is installed at the shaft holes of the first end cap 200 and the second end cap 300. One end of the seal is fitted inside the shaft hole of the semiconductor cooling plate 310 and fits tightly with the outer diameter of the motor shaft to prevent coolant from leaking into the motor cavity, thus ensuring the system's sealing and safety.

[0036] To further improve heat dissipation performance, the exterior of the motor housing 100 is provided with several heat dissipation fins extending along the axial direction. These heat dissipation fins are integrally cast with the housing surface to increase the heat dissipation area and enhance the efficiency of natural air convection heat transfer. As an auxiliary cooling method for the liquid cooling system, they can still maintain basic heat dissipation capacity under conditions of high heat load or unstable coolant circulation.

[0037] In summary, this implementation method fully realizes a servo motor system suitable for medium-to-high load and long-cycle continuous operation, and has good engineering feasibility and technical promotion value.

[0038] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water-cooled servo motor, characterized in that, include: The motor housing (100) includes a first end cap (200) and a second end cap (300) fixedly disposed on both sides of the motor housing (100). The first end cap (200) and the second end cap (300) have the same structure, and a semiconductor cooling plate (310) is fixedly installed on their inner sides. The inner sides of the first end cap (200) and the second end cap (300) are provided with a water-cooling cavity (301) located on one side of the semiconductor cooling plate (310). The outer periphery of the semiconductor cooling plate (310) is provided with a plurality of connecting holes (302) communicating with the water-cooling cavity (301). The inner side of the motor housing (100) is provided with a plurality of annularly distributed inner flow channels (110). The two ends of the inner flow channels (110) are respectively connected to the water-cooling cavities (301) of the first end cap (200) and the second end cap (300). The surfaces of the first end cap (200) and the second end cap (300) are provided with connectors (210) for communicating with the cooling circulation pipeline.

2. The water-cooled servo motor according to claim 1, characterized in that, The inner flow channels (110) are arranged in a circumferential manner, and each of the inner flow channels (110) is arranged parallel to the axis of the motor housing (100).

3. The water-cooled servo motor according to claim 1, characterized in that, The inner side of each of the inner channels (110) is corrugated, and the motor housing (100) is an integrally formed structure.

4. The water-cooled servo motor according to claim 1, characterized in that, The cooling surface of the semiconductor cooling plate (310) faces the inside of the motor housing (100), and the heating surface faces the side of the water-cooled cavity (301).

5. The water-cooled servo motor according to claim 1, characterized in that, The first end cap (200), the second end cap (300), and the semiconductor cooling plate (310) are all provided with shaft holes for the motor shaft to pass through at their center positions. Shaft seals are fixedly installed on the surfaces of the first end cap (200) and the second end cap (300), and one end of the shaft seal is sleeved inside the shaft hole of the semiconductor cooling plate (310).

6. The water-cooled servo motor according to claim 1, characterized in that, The outer side of the motor housing (100) is provided with a plurality of heat dissipation fin structures, which are distributed along the axial direction of the motor housing (100) to increase the heat dissipation surface area and improve the overall heat dissipation efficiency.

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