Water-cooled motor main shaft

Abstract

The utility model provides a water-cooled motor main shaft, and belongs to the technical field of motor parts. The water-cooled motor main shaft comprises a shaft body and a sealing shaft end cover, the shaft body is provided with a through water inlet flow channel at a central shaft, through water return flow channels are symmetrically arranged on two sides of the water inlet flow channel, the water inlet flow channel and the water return flow channel form a water inlet and a water outlet at the same shaft end, and a connecting shaft end is formed at the other shaft end; the sealing shaft end cover comprises a shaft end extending part on the front side and an annular connecting part on the rear side, the hollow part is tightly and fixedly connected to the connecting shaft end through spline connection and clamping connection, a through-flow groove facing the hollow part is formed in the center of the extending part, and the through-flow groove enables the water inlet flow channel and the water return flow channel to be communicated on one side of the connecting shaft end. During water cooling of the motor spindle, cooling water sequentially flows through the water inlet flow channel, the through-flow groove and the water return flow channel to form water cooling circulation. The water-cooled motor spindle has the advantages that actual installation and application of the water-cooled motor spindle are facilitated, and the two-section structure is convenient to process and assemble.

Description

Technical Field

[0001] This utility model belongs to the technical field of motor components, and specifically relates to a water-cooled motor spindle. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. It typically consists of a motor shaft, stator and rotor, bearings, and end covers. The motor shaft is not only the most important supporting and connecting component but also the core power output component during operation. Based on the operating principle of an electric motor, it generates a significant amount of waste heat during operation. Overheating can damage the motor and affect its operation. Therefore, traditional motors mostly use air cooling to achieve heat dissipation. However, air cooling relies on fan blades and a fan cover, and its heat dissipation effect is relatively limited.

[0003] Patent application CN201710336653.0 discloses a water-cooled and shaft-driven water-cooled motor, which includes a four-corner through-hole housing, a stator, enameled coils, a rotor, and a rotating shaft. The rotating shaft has an axially penetrating water-cooling hole in its center. The rear end of the rotating shaft passes through the center of a rear end cover and connects to a rotary joint, which in turn connects to a shaft water inlet connector. The front end of the rotating shaft passes through the center of a front end cover and connects to a drill bit with a central through-hole. Water cooling of the rotating shaft is achieved through the sequential connection of the shaft water inlet connector, rotary joint, rotating shaft, and the central through-hole drill bit. Although this patent enhances the heat dissipation of the rotating shaft through water cooling, its structure requires connecting a water inlet and an outlet at both ends of the rotating shaft, making the external structure cumbersome and inconvenient to apply in actual installation. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a water-cooled motor spindle.

[0005] The purpose of this utility model can be achieved through the following technical solution: A water-cooled motor spindle includes a shaft body and a sealed shaft end cover; a through water inlet channel is formed along its central axis in the shaft body, and a water inlet is formed at one end of the shaft body. Through water return channels are symmetrically formed on both sides of the water inlet channel in the shaft body. A water outlet is formed at the same end of the shaft body where the water inlet is formed. A connecting shaft end is formed at the other end of the shaft body. A plurality of spline grooves are evenly formed on the outer side wall of the connecting shaft end. A shaft end retaining groove is formed circumferentially on the rear side of the spline grooves on the connecting shaft end.

[0006] The sealing shaft end cap is fitted onto the connecting shaft end and includes a solid shaft end extension on the front side and a hollow annular connecting part on the rear side. The sealing shaft end cap has a fixing ring formed inward at the port of the hollow part, and several internal splines that cooperate with the spline groove are evenly formed circumferentially on its annular inner sidewall. The sealing shaft end cap has a flow groove facing the hollow part in the center of the extension part. The flow groove connects the water inlet channel and the water return channel on one side of the connecting shaft end.

[0007] In this utility model, the water cooling flow direction of the motor spindle is as follows: the cooling water flows into the water inlet channel from the water inlet of the spindle body, flows to the flow groove of the sealed shaft end cover and then flows into the return water channel on both sides, and finally flows out from the water outlet.

[0008] In the aforementioned water-cooled motor spindle, the cross-sectional area of ​​the inlet channel should be equal to or similar to the sum of the cross-sectional areas of the return channels on both sides, so as to ensure that the total amount of water entering and leaving the inlet and the outlets on both sides remains consistent, forming a stable water-cooling cycle.

[0009] In the aforementioned water-cooled motor spindle, a shaft end bevel is provided at the edge of the end face of the connecting shaft end, and a first sealing ring is installed on the shaft end bevel at the abutting end face of the connecting shaft end and the sealing shaft end cover connected by a spline.

[0010] In the aforementioned water-cooled motor spindle, the retaining ring has a retaining ring bevel at the hollow end, and the internal spline has a spline bevel on the side facing the hollow opening. Both the retaining ring bevel and the spline bevel cooperate with the shaft end bevel for guidance during installation.

[0011] In the aforementioned water-cooled motor spindle, the shaft end slot has a step formed on the connecting shaft end, and a second sealing ring is sleeved between the inner side of the fixing ring of the sealing shaft end cover and the step of the shaft end slot.

[0012] In the aforementioned water-cooled motor spindle, the shaft body should be connected to a concentric sleeve-type rotary cooling water circulation joint at one end of the water inlet and the water outlet.

[0013] Compared with the prior art, the water-cooled motor spindle provided by this utility model is connected by a water inlet channel, a flow channel and a return channel, so that the water inlet and outlet are set at the same end of the shaft body, which facilitates the actual installation and application of the water-cooled motor spindle; by setting the motor spindle as a two-section structure of shaft body and sealed shaft end cover, the processing and assembly of this structure are facilitated. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the water-cooled motor spindle;

[0015] Figure 2This is a structural separation diagram of the spindle of this water-cooled motor;

[0016] Figure 3 These are structural cross-sectional views and detailed enlarged views of the water-cooled motor spindle;

[0017] In the above figure, 100 is the shaft body; 110 is the water inlet channel; 111 is the water inlet; 120 is the water return channel; 121 is the water outlet; 130 is the connecting shaft end; 131 is the spline groove; 132 is the shaft end bevel; 133 is the shaft end retaining groove; 200 is the sealing shaft end cover; 210 is the retaining ring; 211 is the retaining ring bevel; 220 is the internal spline; 221 is the spline bevel; 230 is the flow channel; 310 is the first sealing ring; 320 is the second sealing ring. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figures 1 to 3 As shown, this water-cooled motor spindle includes a shaft body 100 and a sealed shaft end cover 200. One end of the shaft body 100 is connected to a concentric sleeve-type rotary cooling water circulation joint, and the other end is fixed to the sealed shaft end cover 200 by a spline connection.

[0020] like Figures 2 to 3 As shown, a through-flow water inlet channel 110 is formed within the shaft body 100 along its central axis. An inlet 111 is formed at one end of the inlet channel 110. Symmetrically, through-flow return water channels 120 are formed on both sides of the inlet channel 110 within the shaft body 100. An outlet 121 is formed at the same end of the return water channel 120 where the inlet 111 is located. The cross-sectional area of ​​the inlet channel 110 should be equal to or similar to the sum of the cross-sectional areas of the two return water channels 120 to ensure that the total inflow and outflow at the inlet 111 and the outlets 121 remain consistent, thus forming a stable water-cooling cycle.

[0021] A connecting shaft end 130 is formed on the other side of the shaft body 100. A shaft end chamfer 132 is provided at the edge of the end face of the connecting shaft end 130. Several spline grooves 131 are evenly provided on the outer side wall of the connecting shaft end 130. A shaft end retaining groove 133 is provided on the rear side of the spline grooves 131 in a circumferential manner on the connecting shaft end 130.

[0022] The sealing shaft end cover 200 is fitted onto the connecting shaft end 130, including a solid shaft end extension on the front side and a hollow annular connecting part on the rear side. A retaining ring 210 is formed inwardly at the port of the hollow part of the sealing shaft end cover 200. The retaining ring 210 engages with the shaft end groove 133 on the connecting shaft end 130 to achieve axial locking between the connecting shaft end 130 and the sealing shaft end cover 200. Several internal splines 220 are uniformly formed circumferentially on the annular inner wall of the hollow part of the sealing shaft end cover 200. The internal splines 220 engage with the spline groove 131 to achieve circumferential locking between the connecting shaft end 130 and the sealing shaft end cover 200. Axial locking and circumferential locking prevent relative displacement after the connecting shaft end 130 and the sealing shaft end cover 200 are installed and fixed together, ensuring the coaxiality of the motor spindle.

[0023] The sealing shaft end cover 200 has a flow channel 230 at the center of the shaft end extension facing the hollow part. The flow channel 230 receives the other side of the water inlet channel 110 and the return water channel 120, connecting the two on the side of the connecting shaft end 130. This makes the water cooling flow direction of the motor main shaft such that the cooling water flows into the water inlet channel 110 from the water inlet 111 of the shaft body 100, flows to the flow channel 230 of the sealing shaft end cover 200, and then flows into the return water channel 120 on both sides, and finally flows out from the water outlet 121.

[0024] This water-cooled motor spindle is designed as a two-section structure comprising a shaft body 100 and a sealed shaft end cover 200. The inlet channel 110, flow channel 230, and return channel 120 are connected, allowing the inlet 111 and outlet 121 to be located on the same shaft end. This enables the installation of a rotary cooling water circulation connector on one side, facilitating the actual installation and application of the water-cooled motor spindle. Compared to machining the inlet channel 110, return channel 120, and their connection structure within a single integrated motor spindle, the two-section split structure is more convenient for the machining and assembly of the water-cooled motor spindle.

[0025] To further explain, the retaining ring 210 has a retaining ring bevel 211 at the hollow end, and the inner spline 220 has a spline bevel 221 on the side facing the hollow opening. The retaining ring bevel 211 and the spline bevel 221 cooperate with the shaft end bevel 132 for guidance during installation, which facilitates the sliding fit between the shaft end 130 and the sealing shaft end cover 200.

[0026] To further explain, a first sealing ring 310 is installed on the abutting end face of the connecting shaft end 130 and the sealing shaft end cover 200, which are connected by a spline, at the shaft end chamfer 132. A step is formed in the shaft end groove 133 on the connecting shaft end 130, and a second sealing ring 320 is fitted inside the shaft end groove 133 between the inner side of the retaining ring 210 of the sealing shaft end cover 200 and the step of the shaft end groove 133. Both the first sealing ring 310 and the second sealing ring 320 ensure the sealing of the connection between the connecting shaft end 130 and the sealing shaft end cover 200, preventing leakage of internal cooling water from the connection point.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0028] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A water-cooled motor spindle, comprising a shaft body (100) and a sealed shaft end cover (200); characterized in that, The shaft body (100) has a through water inlet channel (110) along its central axis. The water inlet channel (110) has an inlet (111) at one end of the shaft. The two sides of the water inlet channel (110) have through water return channels (120) symmetrically formed in the shaft body (100). The water return channel (120) has an outlet (121) at the same end of the shaft with the inlet (111). The other end of the shaft body (100) has a connecting shaft end (130). The connecting shaft end (130) has several spline grooves (131) evenly formed on the outer wall. The rear side of the spline grooves (131) has a shaft end slot (133) circumferentially formed on the connecting shaft end (130). The sealing shaft end cap (200) is sleeved on the connecting shaft end (130), including a solid shaft end extension on the front side and a hollow annular connecting part on the rear side. The sealing shaft end cap (200) has a fixing ring (210) formed inward at the port of the hollow part. A plurality of internal splines (220) that cooperate with the spline groove (131) are evenly formed on its annular inner sidewall. The sealing shaft end cap (200) has a flow groove (230) facing the hollow part in the center of the extension. The flow groove (230) connects the water inlet channel (110) and the water return channel (120) on one side of the connecting shaft end (130). The water cooling flow direction of the main shaft of this motor is as follows: the cooling water flows into the water inlet channel (110) from the water inlet (111) of the shaft body (100), flows to the flow groove (230) of the sealing shaft end cover (200) and then flows to both sides into the return water channel (120), and finally flows out from the water outlet (121).

2. The water-cooled motor spindle according to claim 1, characterized in that, The cross-sectional area of ​​the inlet channel (110) should be equal to or close to the sum of the cross-sectional areas of the return channels (120) on both sides, so as to ensure that the total amount of water entering and leaving the inlet (111) and the outlets (121) on both sides is consistent, forming a stable water cooling cycle.

3. A water-cooled motor spindle according to claim 1, characterized in that, The end face edge of the connecting shaft end (130) is provided with a shaft end chamfer (132), and a first sealing ring (310) is installed on the abutting end face of the connecting shaft end (130) and the sealing shaft end cover (200) connected by a spline at the shaft end chamfer (132).

4. A water-cooled motor spindle according to claim 3, characterized in that, The retaining ring (210) has a retaining ring bevel (211) at the hollow end, and the inner spline (220) has a spline bevel (221) on the side facing the hollow opening. The retaining ring bevel (211) and the spline bevel (221) are both guided by the shaft end bevel (132) during installation.

5. A water-cooled motor spindle according to claim 1, characterized in that, The shaft end groove (133) has a step formed on the connecting shaft end (130), and a second sealing ring (320) is sleeved in the shaft end groove (133) between the inner side of the fixing ring (210) of the sealing shaft end cover (200) and the step of the shaft end groove (133).

6. A water-cooled motor spindle according to claim 1, characterized in that, The shaft body (100) should be connected to a concentric sleeve-type rotary cooling water circulation joint at one end of the inlet (111) and outlet (121).

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