Permanent magnet submersible motor stator silicon steel sheet

Abstract

The utility model relates to the technical field of permanent magnet submersible motors for wells, and discloses a stator silicon steel sheet of a permanent magnet submersible motor, which comprises a silicon steel sheet body, the silicon steel sheet body is a silicon steel sheet with a circular outline, a slotted hole penetrates through the end face of the silicon steel sheet body, and a circular hole penetrates through the center of the end face of the silicon steel sheet body. The silicon steel sheet bodies are distributed in a completely axial symmetry mode relative to the axis of any process groove, the silicon steel sheet bodies are parallel teeth, the widths of the teeth are equal, and the axes of the teeth all pass through the circle center of the silicon steel sheet bodies. According to the utility model, the plurality of silicon steel sheet bodies are aligned through the process grooves, the number of the slotted holes and the number of the process grooves are integral multiples of the number of three alternating current phase sequences in the working process, circumferential uniform distribution of a motor magnetic field is realized through the circumferential uniform distribution design of the slotted holes and the process grooves, and the motor performance and the torque output stability are improved; and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet submersible motors for wells, in particular to a silicon steel sheet for a stator of a permanent magnet submersible motor. Background Art

[0002] With the development of my country's oil industry, the application of new technologies such as directional wells and horizontal wells, the development of difficult-to-use reserves, and the gradual increase in high-sand wells and heavy oil wells have brought many problems to the oil wells currently using rod heavy oil pumps. For this reason, submersible linear motors are required to have long strokes, large loads, low energy consumption, small size, and light weight to meet the needs of the growing oil field development. Improving the performance indicators of well submersible motors and improving the operating efficiency of well submersible motors, so as to better achieve energy saving and efficiency improvement and improve the power supply of the power grid, plays a pivotal role in the development of well submersible motors.

[0003] Due to the limitation of application environment, most of the submersible motors for wells are slender structures, and the length of high-power motors can reach 6-7 meters. When manufacturing the stator, the silicon steel sheets need to be stacked on the tooling shaft and positioned with rectangular keys. For this purpose, a process keyway needs to be reserved on the silicon steel sheet. The existence of the process keyway destroys the uniform distribution of the motor magnetic field, which in turn affects the performance of the submersible motor for wells.

[0004] Therefore, it is urgent to study the stator silicon steel sheets of well submersible motors in order to improve the performance of the motors. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a permanent magnet submersible motor stator silicon steel sheet, which realizes the circumferential uniform distribution of the motor magnetic field through the circumferentially uniform distribution design of slot holes and process grooves, improves the motor performance and torque output stability, thereby extending the service life of the motor and solving the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a permanent magnet submersible motor stator silicon steel sheet, comprising a silicon steel sheet body, the silicon steel sheet body is a silicon steel sheet with a circular outer contour, and a slot hole is penetrated through the end face of the silicon steel sheet body, a circular hole is penetrated through the center of the end face of the silicon steel sheet body, a process groove is opened on the circumference of the circular hole, and the silicon steel sheet body is completely axially symmetrically distributed about the axis of any process groove.

[0009] Preferably, the silicon steel sheet body is parallel teeth, each tooth has an equal width, and the tooth axes all pass through the center of the silicon steel sheet body.

[0010] Through the above technical solution, the silicon steel sheet body is a silicon steel sheet with a circular outer contour, and the stator of the motor is formed by stacking multiple silicon steel sheet bodies. The parallel tooth design means that the shape of the teeth on the silicon steel sheet body is parallel, and the spacing between the teeth is relatively uniform. This design can provide better magnetic flux conduction performance, help reduce the eddy current loss and hysteresis loss of the iron core, and thus improve the efficiency of the motor; in addition, the parallel tooth design can also reduce the noise and vibration of the motor and improve the operating stability of the motor.

[0011] Preferably, twenty-four slots are arranged in an array around the axis of the silicon steel sheet body, and the slots are closed slots.

[0012] Through the above technical solution, when the motor is running, the current will generate eddy currents in the silicon steel sheet body. By opening slots on the end faces of the silicon steel sheet body, the path of the current can be changed, thereby reducing the generation of eddy currents and further reducing the energy loss of the motor; the slots can allow the magnetic flux to pass through the silicon steel sheet body more smoothly, reduce magnetic resistance, and increase the magnetic flux density and magnetic induction intensity of the iron core, thereby enhancing the performance of the motor; in addition, the slots can also increase the surface area of ​​the outer surface of the stator, which is conducive to heat dissipation, improve the heat dissipation performance of the motor, and thus extend the service life of the motor; the design of twenty-four slots can also reduce the weight of the stator without affecting the strength of the silicon steel sheet body, which helps to improve the overall efficiency of the motor.

[0013] Preferably, the circular hole is coaxial with the outer contour of the silicon steel sheet body.

[0014] Through the above technical solution, the circular hole is used to pass the shaft of the motor, and then the stator of the motor is formed through a plurality of stacked silicon steel sheet bodies.

[0015] Preferably, three process grooves are circumferentially arranged around the axis of the circular hole.

[0016] Through the above technical solution, the process groove facilitates the installation and fixation of the winding, making the manufacturing process easier and more efficient. In addition, the process groove also helps to accurately align and position multiple silicon steel sheet bodies.

[0017] Compared with the prior art, the utility model provides a permanent magnet submersible motor stator silicon steel sheet, which has the following beneficial effects:

[0018] 1. The utility model opens twenty-four slots and three process slots on the silicon steel sheet body. The slots can change the path of the current, thereby reducing the generation of eddy currents and further reducing the energy loss of the motor. The slots can also make the magnetic flux pass through the silicon steel sheet body more smoothly, reduce magnetic resistance, and increase the magnetic flux density and magnetic induction intensity of the iron core, thereby enhancing the performance of the motor.

[0019] 2. The utility model aligns multiple silicon steel sheet bodies through process grooves. During operation, the number of slot holes and the number of process grooves are both integer multiples of three of the AC phase sequence. The circumferential uniform distribution of the slot holes and the process grooves is designed to achieve circumferential uniform distribution of the motor magnetic field, thereby improving the motor performance and torque output stability, thereby extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the structure of the utility model.

[0021] Among them: 1. Silicon steel sheet body; 2. Slot hole; 3. Round hole; 4. Process groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 A silicon steel sheet for a permanent magnet submersible motor stator includes a silicon steel sheet body 1. The silicon steel sheet body 1 is a silicon steel sheet with a circular outer contour, and a slot hole 2 is penetrated on the end surface of the silicon steel sheet body 1. A circular hole 3 is penetrated in the center of the end surface of the silicon steel sheet body 1, and a process groove 4 is opened on the circumference of the circular hole 3. The silicon steel sheet body 1 is completely axially symmetrical about the axis of any process groove 4.

[0024] Specifically, the silicon steel sheet body 1 is parallel teeth, each tooth width is equal, and the tooth axis passes through the center of the silicon steel sheet body 1. The advantage is that the silicon steel sheet body 1 is a silicon steel sheet with a circular outer contour, and the stator of the motor is formed by stacking multiple silicon steel sheet bodies 1. The parallel tooth design means that the shape of the teeth on the silicon steel sheet body 1 is parallel, and the spacing between teeth is relatively uniform. This design can provide better magnetic flux conduction performance, help reduce the eddy current loss and hysteresis loss of the iron core, and thus improve the efficiency of the motor; in addition, the parallel tooth design can also reduce the noise and vibration of the motor and improve the running stability of the motor.

[0025] Specifically, there are twenty-four slots 2 arranged around the axis array of the silicon steel sheet body 1, and the slot type of the slots 2 is a closed slot. The advantage is that, when the motor is running, the current will generate eddy currents in the silicon steel sheet body 1. By opening the slots 2 on the end face of the silicon steel sheet body 1, the path of the current can be changed, thereby reducing the generation of eddy currents, and thus reducing the energy loss of the motor; the slots 2 can make the magnetic flux pass through the silicon steel sheet body 1 more smoothly, reduce the magnetic resistance, and increase the magnetic flux density and magnetic induction intensity of the iron core, thereby enhancing the performance of the motor; in addition, the slots 2 can also increase the surface area of ​​the outer surface of the stator, which is conducive to the dissipation of heat, improve the heat dissipation performance of the motor, and thus extend the service life of the motor; the design of the twenty-four slots 2 can also reduce the weight of the stator without affecting the strength of the silicon steel sheet body 1, which helps to improve the overall efficiency of the motor.

[0026] Specifically, the circular hole 3 is coaxial with the outer contour of the silicon steel sheet body 1. The advantage is that the circular hole 3 is used to pass the shaft of the motor, and then the stator of the motor is formed by a plurality of stacked silicon steel sheet bodies 1.

[0027] Specifically, three process grooves 4 are opened circumferentially around the axis of the circular hole 3. The advantage is that the process grooves 4 facilitate the installation and fixation of the winding, making the manufacturing process easier and more efficient. In addition, the process grooves 4 also help to accurately align and position multiple silicon steel sheet bodies 1.

[0028] When in use, firstly, the silicon steel sheet bodies 1 are put on the main shaft of the motor in sequence, and multiple silicon steel sheet bodies 1 are aligned through the process grooves 4. During operation, the number of slot holes 2 and the number of process grooves 4 are both integer multiples of three of the AC phase sequence number. The circumferential uniform distribution design of the slot holes 2 and the process grooves 4 realizes the circumferential uniform distribution of the motor magnetic field, thereby improving the motor performance and torque output stability, and thus extending the service life of the motor.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicon steel sheet for a permanent magnet submersible motor stator, comprising a silicon steel sheet body (1), characterized in that: The silicon steel sheet body (1) is a silicon steel sheet with a circular outer contour, and a slot hole (2) is provided through the end surface of the silicon steel sheet body (1), a circular hole (3) is provided through the center of the end surface of the silicon steel sheet body (1), a process groove (4) is provided on the circumference of the circular hole (3), and the silicon steel sheet body (1) is completely axially symmetrically distributed about the axis of any process groove (4).

2. The permanent magnet submersible motor stator silicon steel sheet according to claim 1, characterized in that: The silicon steel sheet body (1) is a parallel tooth, each tooth has an equal width, and the tooth axes all pass through the center of the silicon steel sheet body (1).

3. The permanent magnet submersible motor stator silicon steel sheet according to claim 1, characterized in that: Twenty-four slots (2) are arranged in an array around the axis of the silicon steel sheet body (1), and the slots (2) are closed slots.

4. The permanent magnet submersible motor stator silicon steel sheet according to claim 1, characterized in that: The circular hole (3) is coaxial with the outer contour of the silicon steel sheet body (1).

5. The permanent magnet submersible motor stator silicon steel sheet according to claim 1, characterized in that: Three process grooves (4) are circumferentially arranged around the axis of the circular hole (3).

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