Submersible motor bearing cooling structure

Abstract

The utility model discloses a submersible motor bearing cooling structure, including motor fuselage and rotor, the motor fuselage both ends are provided with front flange cover and rear flange cover respectively, the recess is provided with in the middle portion of front flange cover and rear flange cover, the recess will external water flow " lead in " to flange cover sleeve bearing position direct cooling, the recess is provided with the flow guide component, the flow guide component includes flow guide pipe and small -size water pump, flow guide pipe top extends to the recess outside, flow guide pipe bottom is provided with a plurality of guide tubes, small -size water pump passes through flow guide pipe and leads in the water flow outside the recess, and through a plurality of guide tubes and enters to the recess bottom and diffuses. The recess directly leads in the external water flow bearing installation position, spares the intermediate heat link, and through small -size water pump adds flow guide pipe and constitutes the active flow guide system, and the water flow is accurately guided to the bearing core heating area forcibly, to improve bearing heat dissipation speed greatly.

Description

Technical Field

[0001] This utility model belongs to the field of submersible motor technology, and in particular relates to a cooling structure for submersible motor bearings. Background Technology

[0002] As a core power source for underwater operations, submersible motors' bearings operate at high speeds underwater for extended periods, continuously generating significant heat. If this heat cannot be dissipated promptly, the bearing temperature will rise, affecting the motor's operational stability. In severe cases, this can lead to bearing wear, seizure, or even motor burnout, shortening the equipment's lifespan. Current submersible motor bearing cooling primarily employs passive cooling methods, relying on the natural flow of water generated by the motor's operation through the bearing mounting area. However, because the cooling water flow cannot precisely target the core heat-generating area of ​​the bearing, heat exchange with the external environment is poor, resulting in inadequate cooling of the submersible motor's bearings and impacting its operational stability. Utility Model Content

[0003] This utility model addresses the problems in the prior art by proposing the following technical solution: A submersible motor bearing cooling structure includes: a motor body and a rotor. The motor body has a front flange cover and a rear flange cover at both ends. Bearings are installed between the two ends of the rotor shaft and the corresponding flange cover. The front flange cover and the rear flange cover each have a groove in the middle. The groove "introduces" external water flow to the flange cover sleeve bearing position for direct cooling. The groove is equipped with a flow guiding component, which includes a flow guiding pipe and a small water pump. The top of the flow guiding pipe extends to the outside of the groove, and the bottom of the flow guiding pipe is provided with multiple guide pipes. The small water pump guides the water flow outside the groove through the flow guiding pipe, and the water flows into the bottom of the groove through the multiple guide pipes and diffuses.

[0004] As a preferred embodiment of the above technical solution, the surface of the guide tube is provided with a heat insulation layer, which is used to isolate the guide tube from the inside of the groove.

[0005] As a preferred embodiment of the above technical solution, a plurality of guide plates are rotatably inserted into the end of the guide tube, and a torsion spring is provided at the insertion point of the guide tube for each guide plate. The guide plates deflect at different angles as the water flow inside the guide tube increases or decreases.

[0006] As a preferred embodiment of the above technical solution, all of the guide plates are inclined, and the inclination angles of the multiple guide plates towards the outside of the groove increase sequentially.

[0007] As a preferred embodiment of the above technical solution, the flow guiding assembly further includes a mounting bracket for mounting the flow guiding tube, wherein both ends of the mounting bracket are fixedly connected to the inner wall surface of the groove. The beneficial effects of this utility model are as follows: 1. The groove directly introduces external water flow into the bearing installation position, eliminating the intermediate heat transfer link. It also forms an active flow guiding system with a small water pump and a guide pipe, which forces the water flow to be precisely directed to the core heat-generating area of ​​the bearing, thereby greatly improving the bearing heat dissipation speed. 2. The guide plate integrates a torsion spring and a gradient tilt design, which can guide the water flow to form an all-round, gradient diffusion, increase the heat dissipation effect inside the groove, and can dynamically adjust the angle slightly according to the water flow intensity supplied by the small water pump, taking into account the cooling needs under different operating conditions, making it more suitable for medium and medium-to-large submersible motors. Attached Figure Description

[0008] Figure 1 The diagram shown is a schematic representation of the overall structure of the embodiment; Figure 2 The diagram shown is a front view of the flow guiding component in the embodiment; Figure 3 The diagram shown is an illustration of the arrangement of the guide plates in the embodiment.

[0009] In the diagram: 10, motor body; 20, rotor; 30, bearing; 40, front flange cover; 50, rear flange cover; 60, groove; 70, flow guide assembly; 71, flow guide pipe; 72, small water pump; 73, guide pipe; 74, guide plate; 75, mounting bracket. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings.

[0011] Figures 1-2 The submersible motor bearing cooling structure includes: a motor body 10 and a rotor 20. The motor body 10 is provided with a front flange cover 40 and a rear flange cover 50 at both ends. The rotor 20 is provided with bearings 30 between the two ends of the shaft and the corresponding flange cover. The front flange cover 40 and the rear flange cover 50 are both provided with grooves 60 in the middle. The grooves 60 "introduce" external water flow to the position where the flange cover is sleeved with the bearing 30 for direct cooling. The groove 60 is provided with a flow guiding component 70, which includes a flow guiding pipe 71 and a small water pump 72. The top of the flow guiding pipe 71 extends to the outside of the groove 60, and the bottom of the flow guiding pipe 71 is provided with multiple guide pipes 73. The small water pump 72 guides the water flow outside the groove 60 through the flow guiding pipe 71, and the water enters the bottom of the groove 60 and diffuses through the multiple guide pipes 73.

[0012] The flow guiding assembly 70 also includes a mounting bracket 75 for mounting the flow guiding pipe 71, the two ends of which are fixedly connected to the inner wall surface of the groove 60.

[0013] The groove 60 directly introduces external water flow into the bearing 30 installation position, eliminating the intermediate heat transfer link. It also forms an active flow guiding system with a small water pump 72 and a guide pipe 71, which forces the water flow to be precisely guided to the core heat-generating area of ​​the bearing 30, thereby greatly improving the heat dissipation speed of the bearing 30.

[0014] Figures 1-3 In the middle, the surface of the guide pipe 71 is provided with a heat insulation layer, which is used to isolate the guide pipe 71 from the inside of the groove 60.

[0015] Multiple guide plates 74 are rotatably inserted into the end of the guide tube 73. A torsion spring is provided at the insertion point of the guide tube 73 for each guide plate 74. The guide plate 74 deflects at different angles as the water flow inside the guide tube 73 increases or decreases.

[0016] All of the guide pieces 74 are inclined, and the inclination angles of the multiple guide pieces towards the outside of the groove 60 increase sequentially.

[0017] The guide plate 74 integrates a torsion spring and a gradient tilt design, which can guide the water flow to form an all-round, gradient diffusion, increase the heat dissipation effect inside the groove 60, and dynamically adjust the angle slightly according to the water flow intensity supplied by the small water pump 72, taking into account the cooling needs under different operating conditions, and is more suitable for medium and medium-to-large submersible motors.

[0018] Working principle: When this utility model is in use, the small water pump 72 is started, and the small water pump 72 draws the low-temperature water flow outside the submersible motor into the guide pipe 71. Since the guide pipe 71 is wrapped with a heat insulation layer, heat exchange between the water flow and the external environment can be avoided during the transportation process, ensuring that the water flow remains at a low temperature. The water flow is transported through the guide pipe 71 to multiple guide pipes 73 at the bottom, and diffused through the guide plate 74 at the end of the guide pipe 73 to the bearing 30 installation position at the bottom of the groove 60 to cool the bearing 30. When the motor load changes and the water flow demand changes, the water flow rate in the guide tube 73 is changed by adjusting the power of the small water pump 72. The impact force of the water flow on the guide plate 74 changes. Under the elastic action of the torsion spring, the guide plate 74 deflects along the insertion point, adjusting the water flow diffusion angle. At the same time, the design of multiple guide plates 74 with the inclination angle increasing sequentially from the outside to the inside of the groove 60 can make the water flow form a gradient diffusion, further ensuring that the water flow distribution around the bearing 30 is uniform and avoiding local overheating.

[0019] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A cooling structure for submersible motor bearings, characterized in that, include: The motor body (10) and rotor (20) are provided with a front flange cover (40) and a rear flange cover (50) at both ends of the motor body (10). Bearings (30) are provided between the two ends of the rotor shaft and the corresponding flange cover. Grooves (60) are provided in the middle of the front flange cover (40) and the rear flange cover (50). The grooves (60) "introduce" external water flow to the flange cover sleeve bearing (30) position for direct cooling. The groove (60) is provided with a flow guiding component (70), which includes a flow guiding pipe (71) and a small water pump (72). The top of the flow guiding pipe (71) extends to the outside of the groove (60), and the bottom of the flow guiding pipe (71) is provided with multiple guide pipes (73). The small water pump (72) guides the water flow outside the groove (60) through the flow guiding pipe (71) and enters the bottom of the groove (60) through the multiple guide pipes (73) and diffuses it.

2. The submersible motor bearing cooling structure according to claim 1, characterized in that, The surface of the guide tube (71) is provided with a heat insulation layer, which is used to isolate the guide tube (71) from the inside of the groove (60).

3. The submersible motor bearing cooling structure according to claim 1, characterized in that, Multiple guide plates (74) are rotatably inserted into the end of the guide tube (73). A torsion spring is provided at the insertion point of the guide tube (73) for each guide plate (74). The guide plate (74) deflects at different angles as the water flow inside the guide tube (73) increases or decreases.

4. The submersible motor bearing cooling structure according to claim 3, characterized in that, All of the guide pieces (74) are inclined, and the inclination angles of the multiple guide pieces towards the outside of the groove (60) increase sequentially.

5. The submersible motor bearing cooling structure according to claim 1, characterized in that, The flow guiding assembly (70) also includes a mounting bracket (75) for mounting the flow guiding tube (71), the two ends of which are fixedly connected to the inner wall surface of the groove (60).

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