WO2020143621A1

WO2020143621A1 - Mechatronics high-speed asynchronous submersible electric pump

Info

Publication number: WO2020143621A1
Application number: PCT/CN2020/070683
Authority: WO
Inventors: 聂国军; 程鹏; 冯俊全
Original assignee: 青蛙泵业有限公司
Priority date: 2019-01-11
Filing date: 2020-01-07
Publication date: 2020-07-16

Abstract

A mechatronics high-speed asynchronous submersible electric pump, relating to the technical field of deep well pumps. The main points of the technical solution of said pump are: comprising a motor connected to a pump body, the motor comprising a housing, a stator winding fixed at an inner wall of the housing, a rotor rotatably connected to the housing and opposite the stator winding, and a controller circuit board provided inside the housing; and a cable line of the motor passing through the stator winding and being electrically connected to the controller circuit board, and the controller circuit board being located below the stator winding. The present invention realizes an integrated design of a controller circuit board and a motor, and optimizes the control and feedback effects of the motor; and the design of slots enables the space factor of coils not to be affected, thereby improving the energy utilization rate of the motor, and further improving the practicability of a deep well pump. In addition, the motor is split into a motor cylinder and a controller cylinder, so that the motor can be assembled and disassembled conveniently and quickly.

Description

Mechatronics high-speed asynchronous submersible electric pump

This application requires submission to the China Patent Office on January 11, 2019, with the application number 201910025053.1, and the invention name is "Mechatronics High-speed Asynchronous Submersible Electric Pump" and on the same day to the China Patent Office, application number is 201920042806.5, and the invention name is " The priority of two Chinese patent applications of “Mechatronics High-speed Asynchronous Submersible Electric Pump”, the entire contents of which are incorporated by reference in this application.

Technical field

The invention relates to the technical field of deep well pumps, in particular to an electromechanical integration high-speed asynchronous submersible electric pump.

Background technique

At present, the Chinese patent with the announcement number CN206135587U discloses a permanent-magnet brushless DC motor for deep well pumps, which includes a stator and a rotating shaft located in the casing of the deep well pump. A number of circumferentially arranged mounting slots are opened on the outer peripheral wall of the rotating shaft , A permanent magnet in the shape of a tile is pasted inside the installation slot.

Existing permanent magnets are generally made of rare earth, and the price of rare earth is relatively high, which greatly increases the production cost of the permanent magnet brushless DC motor for deep well pumps.

At the same time, in the process of using the permanent magnet brushless DC motor for deep well pumps, the magnetism of the permanent magnets will gradually weaken or even be lost under the influence of external factors, which will cause more stability to the permanent magnet brushless DC motor for deep well pumps. Big influence. Aimed at the electric pump industry, the permanent magnet motor has complicated processes, high cost, poor stability, and low competitiveness.

In the process of using the permanent-magnet brushless DC motor for deep well pumps, an external controller circuit board is needed to control the speed of the permanent-magnet brushless DC motor for deep well pumps. In addition, during use, the permanent magnet brushless DC motor for deep well pumps needs to be placed in water, and the external controller circuit board needs to be placed on the shore, which means that a longer cable is needed to connect the controller circuit board to the The deep well pump is electrically connected with a permanent magnet brushless DC motor. In the process of transmitting the electrical signal sent by the controller circuit board, the electrical cable with long length is easily distorted, which has a great influence on the use efficiency of the permanent magnet brushless DC motor for deep well pumps.

Summary of the invention

In view of the shortcomings of the existing technology, the object of the present invention is to provide an electromechanical integration high-speed asynchronous submersible electric pump, which has the advantages of high stability and high efficiency.

The above technical object of the present invention is achieved by the following technical solutions: an electromechanical integration high-speed asynchronous submersible electric pump, including an asynchronous motor connected to the pump body, the asynchronous motor includes a housing, fixed to the inner wall of the housing The stator winding at the location, the rotor rotatingly connected to the casing and opposed to the stator winding, the controller circuit board provided inside the casing; the cable of the asynchronous motor passes through the stator winding and The controller circuit board is electrically connected, and the controller circuit board is located below the stator winding.

Preferably, the circuit of the controller circuit board includes a working state detection unit, a signal detection unit, a fault detection unit, a load live detection unit and a motor control unit.

Preferably, the circuit of the controller circuit board includes a control detection module whose core is the controller circuit board and a power management module whose core is the power management chip.

Preferably, the asynchronous motor is a high-speed asynchronous motor, and the model of the controller circuit board is R5F104. The control of the high-speed asynchronous motor is realized by inferring by controlling 6 MOS tubes.

Preferably, the power management chip model is UC2844B, and the power supply voltage and frequency of the asynchronous motor can be adjusted through cooperation with a coil transformer.

Preferably, the inside of the housing is filled with cooling oil.

Preferably, the material of the rotor is cast aluminum or cast copper.

Preferably, a heat dissipation block is fixed on the inner wall of the housing, and the heat dissipation block is located below the stator winding, and the controller circuit board is installed inside the heat dissipation block through epoxy resin.

Preferably, the stator winding includes a stator fixed at the inner wall of the housing and a copper wire wound on the stator, and a plurality of slots for the copper wire to pass through are evenly distributed on the inner ring of the stator ; The stator is also provided with a line hole for the asynchronous motor cable to pass through, and the line hole is in communication with one of the slot holes.

Preferably, the housing includes a motor barrel and a controller barrel, the stator and the rotor are both disposed inside the motor barrel, and the motor barrel is reduced in diameter toward the end of the controller barrel to form a connection ring , The connection ring extends into the controller barrel, and the connection ring is fixedly connected to the controller barrel by bolts, and the controller circuit board is installed inside the controller barrel.

In summary, the beneficial effects of the present invention compared to the prior art are:

1. The controller circuit board is built inside the controller tube, which realizes the integrated design of the controller circuit board and the motor. Only a short length of cable is needed, which reduces the signal transmission in the cable and appears Distortion, optimize the control and feedback effect of the motor;

2. Loosen the bolts to separate the motor barrel from the controller barrel, after which it is more convenient to replace the parts inside the motor barrel or the controller barrel, making the disassembly and assembly process of the electromechanical integration high-speed asynchronous submersible electric pump Become more convenient and fast;

3. The cable connecting the controller circuit board and the motor passes through the through hole, so that the cable will not squeeze the space of the slot, ensure the slot full rate of the stator winding, improve the energy utilization rate of the motor, and make the deep well The practicability of the pump has been further improved; at the same time, the stator is provided with a wire hole, so that the larger diameter cable can be installed inside the mechatronic high-speed asynchronous submersible electric pump, the larger diameter cable can carry more current , In order to produce higher power motors;

5. The material of the rotor is cast aluminum or cast copper. Compared with rare earth, the cost of cast aluminum or cast copper is lower. At the same time, the rotor using cast aluminum or cast copper does not need to worry about the problem of permanent magnets disappearing. Reliability of integrated high-speed asynchronous submersible electric pump;

6. The cooling oil injected inside the casing can cool the controller circuit board and the motor, making the controller circuit board and the motor difficult to overheat and damage;

7. The controller circuit board makes the motor produce high-speed effects. The high-speed asynchronous motor has a high speed, which reduces the length of the stator and rotor, and reduces the production difficulty of the motor. At the same time, the impeller can be greatly reduced Number, shorten the length of the pump body, and reduce the cost of the electric pump.

In general, in the electric pump industry, the use of asynchronous motors makes the electric pumps have the advantages of simple process, low cost, easy control, easy start, high stability, and strong competitiveness.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural view of an embodiment, mainly for showing the composition of the embodiment;

Figure 2 is a schematic diagram of the structure of the stator, which is mainly used to show the positional relationship between the line hole and the slot hole;

3 is a controller and motor drive circuit diagram of a controller integrated deep well pump of the present invention.

4 is a partial circuit diagram of a controller power management power control chip of a controller integrated deep well pump of the present invention.

FIG. 5 is a partial circuit diagram of a controller power management coil of a controller integrated deep well pump of the present invention.

Reference signs: 1. Housing; 11. Motor barrel; 12. Controller barrel; 2. Stator winding; 3. Rotor; 4. Controller circuit board; 5. Heat dissipation block; 6. Slot hole; Hole; 8, connecting ring.

detailed description

The present invention will be further described in detail below with reference to the drawings.

The following describes the implementation of the present invention by specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

It should be noted that the structure, ratio, size, etc. shown in the drawings of this specification are only used to match the contents disclosed in the specification, for those familiar with this technology to understand and read, not to limit the implementation of the present invention Limited conditions, so it has no technical significance. Any modification of structure, change of proportional relationship or adjustment of size should still fall within the scope of the present invention without affecting the efficacy and purpose of the present invention. The disclosed technical content can be covered. At the same time, the terms such as "upper", "lower", "left", right", and "middle" cited in this specification are only for the convenience of description, not to limit the scope of the invention. The change or adjustment of the relative relationship, without substantial changes in the technical content, should also be regarded as the scope of the invention.

Referring to FIGS. 1-5, an electromechanical integrated high-speed asynchronous submersible electric pump includes a motor connected to a pump body, the motor includes a housing 1, a stator winding 2 fixed at an inner wall of the housing 1, a rotational connection The rotor 3 in the casing 1 and opposite to the stator winding 2, the controller circuit board 4 provided inside the casing 1; the cable of the motor passes through the stator winding 2 and is connected to the The controller circuit board 4 is electrically connected, and the controller circuit board 4 is located below the stator winding 2.

Preferably, the circuit of the controller circuit board 4 includes a working state detection unit, a signal detection unit, a fault detection unit, a load live detection unit and a motor control unit.

Preferably, the circuit of the controller circuit board 4 includes a control detection module whose core is the controller circuit board 4 and a power management module whose core is the power management chip.

Preferably, the asynchronous motor is a high-speed asynchronous motor, and the model of the controller circuit board 4 is R5F104. The control of the high-speed asynchronous motor is realized by inferring control of 6 MOS tubes.

Preferably, the model of the power management chip is UC2844B, and the power supply voltage and frequency of the motor can be adjusted through cooperation with the coil transformer.

Preferably, the inside of the housing 1 is filled with cooling oil.

Preferably, the material of the rotor 3 is cast aluminum or cast copper.

Preferably, a heat dissipation block 5 is fixed on the inner wall of the housing 1, and the heat dissipation block 5 is located below the stator winding 2, and the controller circuit board 4 is installed inside the heat dissipation block 5 through epoxy resin .

Preferably, the stator winding 2 includes a stator fixed to the inner wall of the housing 1 and a copper wire wound on the stator, and a plurality of copper wires are evenly distributed on the inner ring of the stator Slot hole 6; the stator is also provided with a wire hole 7 through which the motor cable passes, and the wire hole 7 communicates with one of the slot holes 6.

In this embodiment, the number of the threaded holes 7 is three, and the three threaded holes 7 are evenly distributed on the stator in the circumferential direction. Accordingly, the three threaded holes 7 correspond to the three slotted holes 6 in one-to-one correspondence Connected.

Preferably, the housing 1 includes a motor barrel 11 and a controller barrel 12, the stator and the rotor 3 are both disposed inside the motor barrel 11, and the motor barrel 11 faces the controller barrel 12. The end is reduced in diameter to form a connection ring 8, the connection ring 8 extends into the controller barrel 12, and the connection ring 8 is fixedly connected to the controller barrel 12 by bolts, the controller circuit board 4 is installed Inside the controller barrel 12.

Although the present invention has been described in detail above with general description and specific embodiments, on the basis of the present invention, some modifications or improvements can be made, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present invention belong to the scope claimed by the present invention.

Claims

An electromechanical integration high-speed asynchronous submersible electric pump is characterized by comprising an asynchronous motor connected to the pump body, the asynchronous motor includes a housing (1), and a stator winding fixed on the inner wall of the housing (1) 2) Rotating rotor (3) connected to the casing (1) and opposed to the stator winding (2), controller circuit board (4) provided inside the casing (1); The material is cast aluminum or cast copper; the cable of the asynchronous motor passes through the stator winding (2) and is electrically connected to the controller circuit board (4), and the controller circuit board (4) is located at the Below the stator winding (2).
The mechatronics high-speed asynchronous submersible electric pump according to claim 1, characterized in that the circuit of the controller circuit board (4) includes a working state detection unit, a signal detection unit, a fault detection unit, a load live detection unit and Motor control unit.
The mechatronics high-speed asynchronous submersible electric pump according to claim 1, wherein the circuit of the controller circuit board (4) includes a control detection module and a power management chip whose core is the controller circuit board (4) The core power management module.
The mechatronics high-speed asynchronous submersible electric pump according to claim 3, characterized in that: the asynchronous motor is a high-speed asynchronous motor, the controller circuit board (4) model is R5F104, and it is inferred by controlling 6 MOS tubes The control of the high-speed asynchronous motor is realized.
The mechatronics high-speed asynchronous submersible electric pump according to claim 3, wherein the power management chip model is UC2844B, and the supply voltage and frequency of the asynchronous motor can be adjusted through cooperation with a coil transformer.
The mechatronics high-speed asynchronous submersible electric pump according to claim 1, characterized in that: the inside of the casing (1) is filled with cooling oil.
The electromechanical integration high-speed asynchronous submersible electric pump according to claim 1, wherein the controller circuit board is wrapped with a heat sink outside, and the heat sink is fixed to the inner wall of the housing.
The electromechanical integration high-speed asynchronous submersible electric pump according to claim 7, wherein an epoxy resin is filled between the controller circuit board and the heat sink.
The mechatronics high-speed asynchronous submersible electric pump according to claim 1, wherein the stator winding (2) includes a stator fixed to the inner wall of the casing (1) and copper wound on the stator Wire, the inner ring of the stator is evenly distributed with a number of slots (6) for the copper wire to pass through; the stator is also provided with a wire passing slot (7) for the cable of the asynchronous motor to pass through ).
The mechatronics high-speed asynchronous submersible electric pump according to claim 1, characterized in that the casing (1) includes a motor barrel (11) and a controller barrel, and the stator and the rotor (3) are both provided Inside the motor barrel (11), the motor barrel (11) is reduced in diameter toward the end of the controller barrel (12) to form a connection ring (8), and the connection ring (8) extends into the The controller barrel (12), and the connecting ring (8) is fixedly connected to the controller barrel (12) by bolts, and the controller circuit board (4) is installed on the controller barrel (12) internal.