Submersible pump motor with circulating heat dissipation function

Abstract

The utility model discloses a submersible pump motor with a circulating heat dissipation function. The submersible pump motor comprises heat dissipation fins, a ventilation pipeline, a stator winding, a rotor iron core, ventilation holes, a centrifugal fan, a rotor shaft and a casing. The ventilating duct is arranged on the outer surface of the stator winding; the ventilation pipeline is connected with the machine shell. The heat dissipation fins are arranged on the inner surface of the machine shell. One side of the rotor core is connected with the rotor shaft, the other end of the rotor core is in clearance fit with the stator winding, and the ventilation hole is formed in the rotor core; and the centrifugal fan is connected with the rotor shaft. The circulating air duct accelerates heat exchange inside and outside the motor and improves the heat dissipation effect inside the motor, so that the working environment of the motor is improved, and the working efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible pump machinery, in particular to a motor for a submersible pump with a circulation heat dissipation function. Background Art

[0002] The cooling effect of general industrial submersible asynchronous motors has a great influence on the current density that can be used in the conductors. The heat dissipation of conventional submersible motors is achieved through the heat dissipation aluminum sheets provided by the cast aluminum rotor. The stator winding is the main heat source. The heat generated is promptly cooled through the temperature difference between the inner and outer walls of the casing. Therefore, efficient thermal management is crucial to the efficiency, safety and service life of the motor.

[0003] The stator core is made of stacked sheet materials, which hinders axial heat conduction and makes the heat dissipation effect of conventional motors not very good. If the air gap length between the stator and rotor is adjusted appropriately, the power factor of the motor will be affected and the size of conventional submersible motors will be larger.

[0004] At the same time, since the upper and lower ends of the motor are not connected, the heat at both ends cannot form heat exchange with the circulating water on the outer surface of the casing, and the heat dissipation effect is poor. Summary of the invention

[0005] Technical problem: The technical problem to be solved by the utility model is to provide a submersible pump motor with a circulating heat dissipation function, accelerate the heat exchange inside and outside the motor, improve the heat dissipation effect inside the motor, thereby improving the working environment of the motor and improving the working efficiency of the motor.

[0006] Technical solution: To solve the above technical problems, the technical solution adopted by the embodiment of the utility model is:

[0007] A motor for a submersible pump with a circulating heat dissipation function comprises heat dissipation ribs, ventilation ducts, stator windings, rotor cores, ventilation holes, a centrifugal fan, a rotor shaft and a casing; the ventilation ducts are arranged on the outer surface of the stator windings; the ventilation ducts are connected to the casing; the heat dissipation ribs are arranged on the inner surface of the casing; one side of the rotor core is connected to the rotor shaft, and the other end is gap-fitted with the stator winding, the ventilation holes are arranged inside the rotor core; the centrifugal fan is connected to the rotor shaft.

[0008] As a preferred example, the ventilation duct is a vertically through structure, the number of the ventilation ducts is N, N≥10, and the ventilation ducts are evenly distributed on the circumference of the outer surface of the stator winding.

[0009] As a preferred example, the ventilation holes are through holes, the number of the ventilation holes is M, M≥4, and the ventilation holes are evenly distributed inside the rotor core close to the rotor shaft.

[0010] As a preferred example, a thread groove is provided on the surface of one side where the rotor core and the stator winding are gap-fitted; the length of the thread groove is equal to the length of the rotor core.

[0011] As a preferred example, the number of the heat dissipation fins is P, P≥6, the heat dissipation fins are arranged on the inner surface of the casing at the upper and lower ends of the ventilation duct, and the ends of the heat dissipation fins close to the ventilation duct are arc-shaped structures.

[0012] As a preferred example, the centrifugal fan is provided with a guide air duct, blades and a connecting plate; the centrifugal fan is arranged below the rotor core; the guide air duct is a through hole structure, and the blades are arranged on the outside of the guide air duct; the connecting plate is arranged at the lower end of the blade and is fixedly connected to the blade; the connecting plate is a circular ring structure, and the connecting plate is mounted on the rotor shaft and is fixedly connected to the rotor shaft.

[0013] As a preferred example, the guide air duct is sleeved on the rotor shaft, and the diameter of the guide air duct is larger than the outer diameter of the rotor shaft; the number of blades is Q, Q≥4, and the blades are evenly distributed on the outside of the guide air duct.

[0014] Beneficial effects: Compared with the prior art, the technical solution of the utility model has the following beneficial effects: The technical solution of the utility model is to set ventilation ducts and ventilation holes to form a circulating air duct. By setting a centrifugal fan, the heated air inside the shell can circulate in the ventilation ducts and ventilation holes, and form heat exchange with the external water body through the ventilation duct, so as to dissipate the heat inside; by setting heat dissipation ribs and setting one end of the heat dissipation ribs into an arc-shaped structure, the flow guide path of the circulating air duct can be greatly optimized, the flow guide efficiency of the circulating air duct can be improved, and the heat dissipation effect can be further improved. At the same time, a spiral groove is set on the surface of the rotor core close to the stator core, so that the heat generated in the gap when the rotor core rotates can be taken out and circulated for cooling, so as to dissipate the heat inside the motor comprehensively. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of an embodiment of the utility model;

[0016] Figure 2 It is a structural diagram of the stator winding and the rotor core of an embodiment of the utility model;

[0017] Figure 3 This is a front view of a centrifugal fan according to an embodiment of the utility model;

[0018] Figure 4 It is a top view of the centrifugal fan of the embodiment of the utility model.

[0019] The figure includes: heat dissipation ribs 1, ventilation ducts 2, stator windings 3, rotor cores 4, ventilation holes 5, centrifugal fans 6, rotor shafts 7, housings 8, thread grooves 9, air guide ducts 61, blades 62, and connecting plates 63. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 and Figure 2 As shown, a submersible pump motor with a circulating heat dissipation function according to an embodiment of the utility model comprises a heat dissipation rib 1, a ventilation duct 2, a stator winding 3, a rotor core 4, ventilation holes 5, a centrifugal fan 6, a rotor shaft 7 and a casing 8; the ventilation duct 2 is arranged on the outer surface of the stator winding 3; the ventilation duct 2 is connected to the casing 8; the heat dissipation rib 1 is arranged on the inner surface of the casing 8; one side of the rotor core 4 is connected to the rotor shaft 7, and the other end is gap-fitted with the stator winding 3, and the ventilation holes 5 are arranged inside the rotor core 4; the centrifugal fan 6 is connected to the rotor shaft 7.

[0022] In a submersible pump motor with a circulation heat dissipation function of the above structure, a ventilation duct 2 and a ventilation hole 5 are provided, and the ventilation duct 2 and the ventilation hole 5 cooperate to form a circulation air duct. By providing a centrifugal fan 6, the heated air inside the housing 8 can circulate in the ventilation duct 2 and the ventilation hole 5, and form heat exchange with the external water body through the ventilation duct 2, so as to dissipate the heat inside. A spiral groove is provided on the surface of one side where the rotor core 4 and the stator winding 3 are gap-matched, and a certain wind pressure is formed in the small gap between the rotor core 4 and the stator winding 3, and the heat generated by the stator and the rotor in the gap is taken out through the spiral groove to complete the heat exchange. By providing a heat dissipation rib 1 and setting one end of the heat dissipation rib 1 into an arc-shaped structure, the flow guide path of the circulation air duct can be greatly optimized, the flow guide efficiency of the circulation air duct can be improved, and the heat dissipation effect can be further improved.

[0023] When the motor is running, the rotor core 4 and the centrifugal fan 6 rotate synchronously with the rotor shaft 7. When the centrifugal fan 6 rotates, wind pressure is generated, causing the air in the ventilation hole 5 to flow downward, and through the action of the centrifugal fan 6, it flows to the ventilation duct 2, enters the inside of the ventilation duct 2 from the bottom of the ventilation duct 2, and completes heat exchange with the external water body, so that the heat of the air flowing out from the top of the ventilation duct 2 is taken away, thereby completing the heat dissipation inside the casing 8. During the flow of hot air, the heat dissipation ribs 1 guide the hot air, optimize the air flow path, and make the heat dissipation efficiency higher. At the same time, the heat between the rotor core 4 and the stator winding 3 is taken out through the threaded groove 9 and the heat exchange is completed. Thereby completing the comprehensive heat dissipation inside the casing 8, improving the working environment of the motor, and improving the working efficiency of the motor.

[0024] As a preferred example, the ventilation duct 2 is a vertical through-structure, the number of the ventilation ducts 2 is N, N ≥ 10, and they are evenly distributed on the circumference of the outer surface of the stator winding 3. The ventilation duct 2 is set as a through-structure so that the air inside the shell can circulate and exchange heat with the external water body. A plurality of evenly arranged ventilation ducts 2 are set, so that the heat exchange effect between the internal hot air and the external water body is better, the heat exchange is more uniform and comprehensive, and the heat dissipation effect is improved.

[0025] As a preferred example, the ventilation holes 5 are through holes, the number of the ventilation holes 5 is M, M≥4, and they are evenly distributed inside the rotor core 4 near the side of the rotor shaft 7. The ventilation holes 5 cooperate with the ventilation duct 2 to form a circulating air duct inside the casing 8. The heat generated by the rotor core 4 as the rotor shaft 7 rotates flows out through the ventilation holes 5, and then flows in the circulating air duct. When it flows into the ventilation duct 2, it exchanges heat with the external water body, thereby ensuring that the heat inside the casing 8 is continuously taken out and continuously circulated heat dissipation is performed.

[0026] As a preferred example, a thread groove 9 is provided on the surface of one side of the rotor core 4 and the stator winding 3, and the length of the thread groove 9 is equal to the length of the rotor core 4. In the small air gap between the stator winding 3 and the rotor core 4, a certain wind pressure is formed to circulate part of the heat generated by the stator and rotor themselves, and at the same time, a good heat exchange is formed with the water outside the casing 8 through the heat dissipation ribs 1 and the circulating ventilation pipe 2, so as to achieve a better heat dissipation effect.

[0027] As a preferred example, the number of the heat dissipation ribs 1 is P, P≥6, and the heat dissipation ribs 1 are arranged on the inner surface of the casing 8 at the upper and lower ends of the ventilation duct 2, and the end of the heat dissipation rib 1 close to the ventilation duct 2 is an arc-shaped structure. The heat dissipation ribs 1 are arranged at both ends of the ventilation duct 2, and the heat dissipation ribs 1 close to one end of the ventilation duct 2 can be fully arranged into an arc structure, which greatly optimizes the guide path of the circulating air duct, improves the guide efficiency of the circulating air duct, and has an excellent effect on the formation and improvement of the circulating air duct, thereby further improving the heat dissipation effect inside the casing 8. At the same time, the heat dissipation ribs 1 are arranged at both ends of the ventilation duct 2, which can fully guide the two ends of the ventilation duct 2, making the heat dissipation more uniform and comprehensive.

[0028] like Figure 3 and Figure 4As shown, as a preferred example, the centrifugal fan 6 is provided with a guide air duct 61, blades 62 and a connecting plate 63; the centrifugal fan 6 is arranged below the rotor core 4; the guide air duct 61 is a through hole structure, and the blades 62 are arranged outside the guide air duct 61; the connecting plate 63 is arranged at the lower end of the blade 62 and is fixedly connected to the blade 62; the connecting plate 63 is a circular ring structure, and the connecting plate 63 is sleeved on the rotor shaft 7 and is fixedly connected to the rotor shaft 7. The centrifugal fan 6 rotates synchronously with the rotor shaft 7. The centrifugal wind pressure generated during the rotation process takes out the heat in the ventilation hole 5 through the guide air duct 61 and sends the hot air to the inside of the ventilation duct 2 through the rotation of the blades 62, and performs heat exchange with the external water in the air duct 2, thereby dissipating heat. The existence of the centrifugal fan 6 can make the air inside the housing 8 circulate more stably and complete heat exchange, thereby improving the efficiency of heat dissipation.

[0029] As a preferred example, the guide air duct 61 is sleeved on the rotor shaft 7, and the diameter of the guide air duct 61 is larger than the outer diameter of the rotor shaft 7; the number of the blades 62 is Q, Q≥4, and the blades 62 are evenly distributed on the outer side of the guide air duct 61. A plurality of blades 62 are provided, and the blades 62 are evenly distributed on the outer surface of the guide air duct 61, so that the centrifugal fan 6 can generate a greater wind pressure when rotating, and the heat in the ventilation hole 5 is taken out and flows out through the guide air duct 61 and flows into the ventilation duct 2 through different blades 62 to complete the heat exchange with the external water body, so that the heat exchange is more comprehensive.

[0030] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above specific embodiments. The above specific embodiments and the description in the specification are only for further illustrating the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the claims and their equivalents.

Claims

1. A submersible pump motor with circulating heat dissipation function, characterized in that: The invention comprises a heat dissipation rib (1), a ventilation duct (2), a stator winding (3), a rotor core (4), a ventilation hole (5), a centrifugal fan (6), a rotor shaft (7) and a casing (8); the ventilation duct (2) is arranged on the outer surface of the stator winding (3); the ventilation duct (2) is connected to the casing (8); the heat dissipation rib (1) is arranged on the inner surface of the casing (8); one side of the rotor core (4) is connected to the rotor shaft (7) and the other end is gap-fitted with the stator winding (3); the ventilation hole (5) is arranged inside the rotor core (4); and the centrifugal fan (6) is connected to the rotor shaft (7).

2. The submersible pump motor according to claim 1, characterized in that: The ventilation duct (2) is a vertically penetrating structure, the number of the ventilation ducts (2) is N, N≥10, and they are evenly distributed on the circumference of the outer surface of the stator winding (3).

3. The motor for a submersible pump according to claim 1, characterized in that: The ventilation holes (5) are through holes, the number of the ventilation holes (5) is M, M≥4, and the ventilation holes (5) are evenly distributed inside the rotor core (4) on one side close to the rotor shaft (7).

4. The motor for a submersible pump according to claim 1, characterized in that: A thread groove (9) is provided on the surface of one side of the rotor core (4) and the stator winding (3) where clearance is fitted; the length of the thread groove (9) is equal to the length of the rotor core (4).

5. The motor for a submersible pump according to claim 1, characterized in that: The number of the heat dissipation ribs (1) is P, where P is ≥ 6. The heat dissipation ribs (1) are arranged on the inner surface of the casing (8) at the upper and lower ends of the ventilation duct (2). The end of the heat dissipation rib (1) close to the ventilation duct (2) is an arc-shaped structure.

6. The motor for a submersible pump according to claim 1, characterized in that: The centrifugal fan (6) is provided with a guide air duct (61), blades (62) and a connecting plate (63); the centrifugal fan (6) is arranged below the rotor core (4); the guide air duct (61) is a through-hole structure, and the blades (62) are arranged outside the guide air duct (61); the connecting plate (63) is arranged at the lower end of the blade (62) and is fixedly connected to the blade (62); the connecting plate (63) is a circular ring structure, and the connecting plate (63) is sleeved on the rotor shaft (7) and is fixedly connected to the rotor shaft (7).

7. The motor for a submersible pump according to claim 6, characterized in that: The guide air duct (61) is sleeved on the rotor shaft (7), and the diameter of the guide air duct (61) is greater than the outer diameter of the rotor shaft (7); the number of the blades (62) is Q, Q≥4, and the blades (62) are evenly distributed on the outer side of the guide air duct (61).

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