CN116995881B - Energy-saving efficient high-frequency submersible motor and manufacturing process thereof - Google Patents

Abstract

This application relates to the field of motors and discloses an energy-saving and efficient high-frequency submersible motor and its manufacturing process. The high-frequency submersible motor is used in submersible pumps. The working frequency of the high-frequency submersible motor is 100Hz to 400Hz. The working speed of the high-frequency submersible motor is It is 3000r/min to 7200r/min. The rotor of the high-frequency submersible motor is a squirrel cage structure. The rotor includes an iron core, a motor shaft, a copper bar and an end ring. The motor shaft and copper bars are inserted into the iron core. There are multiple copper bars distributed around the motor shaft. The end ring is formed by melting the copper particles and then forming it under the action of centrifugal force. The end ring is connected to the copper bar in the molten state of the copper particles. This application changes the existing way that portable submersible electric pumps and frequency converters must be used together. It uses a high-frequency generator as a driving power source, making it unnecessary for the submersible electric pump set to be used with a frequency converter, reducing the size and size of the portable rescue equipment. weight, more convenient to use.

Description

An energy-saving and efficient high-frequency submersible motor and its manufacturing process

Technical field

The present application relates to the field of motor technology, and more specifically, to a portable, energy-saving and efficient high-frequency submersible motor and its manufacturing process.

Background technique

A submersible pump is a device with a sealed motor that is tightly coupled to the pump body. When in use, the entire submersible pump is submerged in the fluid to be pumped, and the submersible pump pushes the fluid to the ground. Submersible pump units are usually equipped with a watertight or encapsulated submersible motor, and the submersible pump unit is inserted directly into the water or the liquid to be conveyed, that is to say immersed in it, so that these submersible pump units are at least in operation. Should be surrounded by the liquid to be pumped. A general submersible pump is installed in the fluid in the tank and discharges the fluid in the tank to the outside. A submersible pump consists of a motor composed of a rotor and a stator; a pump body that seals the motor and is equipped with a water inlet and outlet; and an impeller that sucks in and discharges fluid as the motor rotates. The motor drives the impeller to rotate, sucking in and discharging the fluid in the tank.

Patent CN107975481B (Application No.: 201710692410.0) discloses a submersible pump unit and a method for operating the submersible pump unit. The pump unit in this patent is connected to a frequency converter or motor controller on a cable. Similar to the submersible pump unit in the patent CN107975481B, existing high-efficiency and portable submersible pumps generally need to be adapted to be used in conjunction with independent start-up and operation control frequency converters and dedicated power transmission cables. Since the output of the frequency converter contains a large number of harmonic components, in order to reduce losses, the distance between the frequency converter and the motor should be as short as possible, and the frequency converter needs to be installed in a high-protection IP-level controller box that can move with the water pump. The manufacturing requirements of the controller box are relatively high, resulting in deficiencies in equipment transportation, on-site control, and safety protection. In addition, in submersible pumps using permanent magnet motors, the permanent magnet motors also face the risk of high-temperature demagnetization of the magnets. Although the permanent magnet motors are soaked in water, the stator of the permanent magnet motors has good heat dissipation, but the magnets of the rotor are prone to demagnetization. Risk, so the power density and use occasions of permanent magnet motors are subject to certain restrictions.

Contents of the invention

The purpose of this application is to provide an energy-saving, efficient, high-power-density high-frequency submersible motor and its manufacturing process, to solve the inconvenient technical problem that traditional high-frequency submersible motors and frequency converters must be used together, and to achieve the goal of making it unnecessary to match submersible motors. The use of frequency converters reduces the size and weight of portable rescue equipment, making it more convenient to use.

The embodiments of this application provide an energy-saving and efficient high-frequency submersible motor and its manufacturing process. The high-frequency submersible motor is used in submersible pumps. The working frequency of the high-frequency submersible motor is 100Hz to 400Hz. The working speed of the high-frequency submersible motor is 3000r. /min to 7200r/min.

In one possible implementation, the rotor of the high-frequency submersible motor has a squirrel-cage structure. The rotor includes an iron core, a motor shaft, a copper bar and an end ring. The motor shaft and copper bar are inserted into the iron core, and the copper bar is composed of multiple and distributed around the motor shaft. The end ring is formed by melting the copper particles and then under the action of centrifugal force. The end ring is connected to the copper bar in the molten state of the copper particles.

In another possible implementation, the manufacturing process used to manufacture energy-saving and efficient high-frequency submersible motors includes: stacking silicon steel sheets to make an iron core, with a shaft hole and a closed slot on the iron core, and mounting the motor shaft on it. into the shaft hole, insert the copper strip into the closed slot, and set the copper strip protruding from both ends of the iron core; install heat shielding plates at both ends of the iron core, and install a forming ring that matches the heat shielding plate on the motor shaft. , one end of the forming ring is sleeved and connected to the heat shielding plate, and the other end of the forming ring is sleeved and connected to the motor shaft. A molding cavity is formed between the heat shielding plate and the forming ring, and copper particles are loaded into the molding cavity; the motor is The two ends of the shaft are connected to the rotating ends respectively, and the copper particles are heated to a molten state through the induction coil in the circumferential direction of the forming ring; the motor shaft is driven to rotate through the two rotating ends, and the end ring is formed under the action of centrifugal force, and then the molding is removed. ring, clean and shape the end ring.

In another possible implementation, a spring is connected to the end surface of each rotating end, and the spring is used to contact the forming ring against the end surface of the iron core.

In another possible implementation, the heat insulation plate is in an annular shape, and a heat insulation tube is provided in the middle of the heat insulation board. The heat insulation tube is used to be sleeved and connected to the motor shaft, and the end of the heat insulation tube is in contact with the forming ring. ; An annular first step surface and an annular second step surface are respectively provided on the inner wall of one end of the forming ring close to the iron core. The first step surface is sleeved and connected to the iron core, and the second step surface is sleeved and connected to the heat insulation circumferential direction of the board.

In another possible implementation of the manufacturing process of an energy-saving and efficient high-frequency submersible motor, the heat insulation plate is provided with an annular third step surface on the opposite side of the second step surface, and the third step surface is sleeve-connected with The retaining ring is used to clamp the end of the forming ring from the circumferential direction.

In another possible implementation, the rotating end includes a fixed seat and a vibration component, and the vibration component is used to vibrate the fixed seat; the copper particles are heated to a molten state through an induction coil on the circumference of the forming ring, and also includes: starting The induction coil in the circumferential direction of the forming ring runs for the first time period, the vibration component is started to run for the second time period, and the induction coil in the circumferential direction of the forming ring is started to continue running for the third time period to heat the copper particles to a molten state; through two The rotating end drives the motor shaft to rotate, and the end ring is formed under the action of centrifugal force. It also includes: driving the motor shaft to rotate at a first speed through the two rotating ends for a fourth period of time, starting the vibration component to run for a fifth period of time, and using the two rotating ends to The drive motor shaft rotates at a second speed for a sixth period of time; wherein the second speed is 2 to 5 times the first speed.

In another possible implementation, the end of the forming ring close to the rotating end is provided with heat dissipation fins, and the heat dissipation fins are arranged along the axial direction of the motor shaft; the manufacturing process also includes: driving the motor shaft through the two rotating ends to After rotating at the second speed for a sixth period of time, the motor shaft is continued to be driven by the two rotating ends to rotate at a third speed for a seventh period of time; wherein the third speed is 1/8 to 1/5 of the first speed.

In another possible implementation, the outer wall of the heat insulating tube is tapered, and the outer diameter of the heat insulating tube gradually increases from the forming ring to the heat insulating plate; the end ring is cleaned and shaped, including: The pores and defective structures between the heat-insulating tube and the heat-insulating tube are processed to remove materials, and the removed pores and defective structures form oil grooves on the end ring; when removing the pores and defective structures, remove from 1/4 to 1/4 of the length of the heat-insulating tube. /3.

In another possible implementation, the thickness of the heat insulation board gradually decreases from the center of the heat insulation board to the edge of the heat insulation board, and protruding flow guide teeth are provided in the circumferential direction of the heat insulation board. A guide groove is formed between the teeth, and the second step surface and the guide teeth are positioned in cooperation with each other.

In another possible implementation, the heat shielding plate is made of heat insulating material, and an insulating coating is coated between the heat shielding plate and the iron core.

The embodiment of the present application also provides an energy-saving and efficient high-frequency submersible pump. The high-frequency submersible pump includes the above-mentioned high-frequency submersible motor. The high-frequency submersible pump includes an impeller and a pump body. The impeller is installed on the In the pump body, the high-frequency submersible motor drives the impeller to rotate.

Compared with the prior art, the beneficial effects of the embodiments of the present application are:

The embodiment of the present application provides an energy-saving and efficient high-frequency submersible motor. The high-frequency submersible motor is used in a submersible pump. The working frequency of the high-frequency submersible motor is usually 100Hz to 400Hz, so that the high-frequency submersible motor can be used in flood control and drainage vehicles. It directly uses high-frequency power sources such as vehicle-mounted high-frequency generators as the power supply, thereby eliminating the need to use an inverter. At the same time, the working speed of the high-frequency submersible motor is 3000r/min to 7200r/min. Compared with the existing 50Hz market power supply, Electric submersible motor, the volume and weight of this high-frequency submersible motor are greatly reduced, and due to its high-speed operation, it can provide greater lift and flow. In addition, since it does not need to be used with a frequency converter, there is no harmonic influence generated by the frequency converter, the iron loss of the motor is reduced, and ordinary cables can be used to realize long-distance power transmission. The pump set can be started by adapting an ordinary power switch. Stop control, easy to use.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of the present application. For some embodiments, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the internal structure of a rotor of an energy-saving and efficient high-frequency submersible motor in an embodiment of the present application;

Figure 2 is a schematic structural diagram of the rotor of an energy-saving and efficient high-frequency submersible motor during production in an embodiment of the present application;

Figure 3 is a partial structural diagram of the rotor at point A of the high-frequency submersible motor in production in Figure 2;

Figure 4 is a schematic structural diagram of the rotor of another energy-saving and efficient high-frequency submersible motor in the embodiment of the present application during production;

Figure 5 is a schematic diagram of the partial structure of position B of the rotor of the high-frequency submersible motor in production in Figure 4;

Figure 6 is a partial structural schematic diagram of the rotor of another high-frequency submersible motor in production according to the embodiment of the present application;

Figure 7 is a partial structural schematic diagram of the rotor of another high-frequency submersible motor in production according to the embodiment of the present application;

Figure 8 is a schematic left structural diagram of the rotor of another high-frequency submersible motor in the embodiment of the present application;

Figure 9 is a schematic structural diagram of an energy-saving and efficient high-frequency submersible pump in an embodiment of the present application;

Figure 10 is a schematic structural diagram of another energy-saving and efficient high-frequency submersible pump in an embodiment of the present application;

In the figure, 1. Rotor; 11. Iron core; 111. Shaft hole; 112. Closed slot; 113. Heat insulation plate; 113a, heat insulation tube; 113b, guide teeth; 113c, guide groove; 114, forming ring ; 114a, first step surface; 114b, second step surface; 114c, third step surface; 114d, heat dissipation fin; 115, molding cavity; 115a, oil groove; 12, motor shaft; 13, copper bar; 14, end Ring; 21, rotating end; 211, fixed seat; 212, vibration component; 22, induction coil; 23, spring; 24, fixed ring; 31, impeller; 32, pump body.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clear, this application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

It should be noted that when a component or structure is referred to as being "fixed to" or "disposed on" another component or structure, it can be directly on the other component or structure or indirectly on the other component or structure. When a component or structure is referred to as being "connected to" another component or structure, it may be directly connected to the other component or structure or indirectly connected to the other component or structure.

It should be understood that the terms "length", "width", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top" The orientations or positional relationships indicated by , "bottom", "inner", "outside", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply what is meant. The device or a component or structure must have a specific orientation, be constructed and operate in a specific orientation and therefore should not be construed as limiting the application.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

Patent CN107975481B (Application No.: 201710692410.0) discloses a submersible pump unit and a method for operating the submersible pump unit. The pump unit in this patent is connected to a frequency converter or motor controller on a cable. Similar to the submersible pump unit in patent CN107975481B, existing high-efficiency, portable submersible pumps generally need to be adapted to be used in conjunction with independent start-up and operation control frequency converters and dedicated power transmission cables. Since the output of the frequency converter contains a large number of harmonic components, in order to reduce losses, the distance between the frequency converter and the motor should be as short as possible, and the frequency converter needs to be installed in a high-protection IP-level controller box that can move with the water pump. The manufacturing requirements of the controller box are relatively high, resulting in deficiencies in equipment transportation, on-site control, and safety protection. In addition, in submersible pumps using permanent magnet motors, the permanent magnet motors also face the risk of high-temperature demagnetization of the magnets. Although the permanent magnet motors are soaked in water, the stator of the permanent magnet motors has good heat dissipation, but the magnets of the rotor are prone to demagnetization. , so the power density and application scenarios of permanent magnet motors are subject to certain limitations.

Based on the above reasons, embodiments of the present application provide an energy-saving and efficient high-frequency submersible motor. The high-frequency submersible motor is used in submersible pumps. The working frequency of the high-frequency submersible motor is usually 100Hz to 400Hz, so that the high-frequency submersible motor can A high-frequency generator is directly used as the power supply, and there is no need to use an inverter. At the same time, the working speed of the high-frequency submersible motor is 3000r/min to 7200r/min. Compared with the existing submersible motors that use 50Hz mains power, this The volume and weight of high-frequency submersible motors are greatly reduced, and due to high-speed operation, they can provide greater lift and flow. In addition, since it does not need to be used with a frequency converter, there is no harmonic influence generated by the frequency converter, the iron loss of the motor is reduced, and ordinary cables can be used to realize long-distance power transmission. The pump set can be started by adapting an ordinary power switch. Stop control, easy to use.

In some scenarios, an energy-saving and efficient high-frequency submersible motor according to the embodiment of the present application can be used in emergency and disaster relief equipment such as flood control pumps. It can be used at the work site without the need for a frequency converter, making this high-frequency submersible motor more suitable. It is used in harsh on-site environments for flood control work, and has higher speed, greater lift, and stronger drainage capacity during emergency rescue and disaster relief.

In other scenarios, an energy-saving and efficient high-frequency submersible motor according to the embodiment of the present application can also be used in submersible pumps for aquaculture, sewage treatment, etc., and can provide greater lift and volume in aquaculture, sewage treatment, etc. Smaller and lighter, it is more suitable for mobile use on the job site.

An energy-saving and efficient high-frequency submersible motor provided by embodiments of the present application will be described in detail below with reference to specific examples.

The embodiment of the present application provides an energy-saving and efficient high-frequency submersible motor. The high-frequency submersible motor is used in a submersible pump. The working frequency of the high-frequency submersible motor is 100Hz to 400Hz. The working speed of the high-frequency submersible motor is 3000r/ min to 7200r/min.

Compared with existing submersible pumps, which generally need to be used with frequency converters, the frequency converter and its control cabinet occupy a larger space in the submersible pump unit. When this energy-saving and efficient high-frequency submersible motor is used, due to the If the working frequency is greater than 50Hz of the mains, the power supply provided by the generator with an operating frequency greater than 50Hz can be directly used as the working power supply. The same structural design can increase the working speed of the high-frequency submersible motor, and does not need to be used with a frequency converter.

For example, the operating frequency of the high-frequency submersible motor in the embodiment of the present application is 100 Hz to 400 Hz.

For example, the working speed of the high-frequency submersible motor in the embodiment of the present application is 3000r/min to 7200r/min.

The beneficial effect brought by the above implementation method is that because the high-frequency submersible motor in the embodiment of the present application directly uses a high-frequency power supply, it does not need to be used with a frequency converter, which reduces the size and weight of the submersible pump and is suitable for use in the wild without mains power. When used in the environment, the high-frequency generator is directly driven, which improves the convenience of using the high-frequency submersible motor. Moreover, this high-frequency submersible motor does not need to be used with a frequency conversion control cabinet, which reduces the use and maintenance costs of the submersible pump.

The beneficial effect brought by the above implementation method is that under the same motor structure design, due to the use of a working power supply with a frequency higher than that of the mains, this high-frequency submersible motor increases the speed of the submersible pump, which is beneficial to improving the submersible pump. The lift and working efficiency of the water pump when used.

In some implementations, the rotor 1 of this high-frequency submersible motor has a squirrel cage structure. The rotor 1 includes an iron core 11, a motor shaft 12, a copper bar 13 and an end ring 14. The motor shaft 12 and the copper bar 13 are inserted in the iron core. 11, there are multiple copper bars 13 distributed around the motor shaft 12. The end ring 14 is formed by melting the copper particles and then under the action of centrifugal force. The end ring 14 is in contact with the copper bars 13 in the molten state of the copper particles. connect.

Structurally, this high-frequency submersible motor includes a stator and a rotor 1. The stator is sleeve-connected to the outside of the rotor 1. The stator and the rotor 1 cooperate with each other to drive the rotor 1 to rotate.

Figure 1 is a schematic diagram of the internal structure of a rotor of an energy-saving and efficient high-frequency submersible motor in an embodiment of the present application. As shown in Figure 1, structurally, the rotor 1 includes an iron core 11, a motor shaft 12, and a copper bar 13. And the end ring 14, the motor shaft 12 is the rotation axis of the rotor 1, the copper bar 13 and the end ring 14 are both copper structures.

Structurally, as shown in Figure 1, the motor shaft 12 and the copper bars 13 are inserted into the iron core 11. There are multiple copper bars 13 distributed around the motor shaft 12. The copper bars 13 and the end rings 14 are connected to each other. , so that the copper strip 13 and the end ring 14 together form a squirrel-cage structure.

When producing the rotor 1, the end ring 14 is formed by melting the copper particles and then forming it under the action of centrifugal force, so that the end ring 14 can discharge the bubbles in the copper material after the copper particles are melted under the action of centrifugal force, thereby improving the end performance. The tightness of the structure of the ring 14 makes the copper strip 13 and the end ring 14 of the end ring 14 more closely combined with each other.

For example, the casing of the high-frequency submersible motor in the embodiment of the present application may be a sealed structure. One end of the casing of the high-frequency submersible motor is filled with cooling oil. When the rotor 1 is in use, the rotor 1 can pass through one end of the casing. The filled cooling oil dissipates heat and cools down.

The beneficial effect brought by the above implementation method is that because this high-frequency submersible motor uses a copper rotor, it fills the gap in the industry where existing submersible motors do not use copper rotors. On the basis that the heat dissipation effect of the submersible motor is already good, Overcoming technical bias, the working efficiency of the submersible motor is further improved, making the high-frequency submersible motor more energy-saving and efficient, and further improving the power density and life of the motor.

The beneficial effect brought by the above implementation method is that the end ring of the squirrel-cage copper rotor is formed by melting and centrifugal molding, which improves the density and molding quality of the end ring, making the copper bars and end rings of the end ring The closer integration also improves the production accuracy and production quality of the copper rotor.

Patent CN107508393A (Application No.: 201710830091.5) discloses a manufacturing process for asynchronous motor copper rotors. The end rings are produced using pure copper powder metallurgy. After the rotor core, end rings and copper bars are assembled, induction is used to Heated and riveted into one body to form the copper rotor of the asynchronous motor. In actual use, the copper rotor often rotates at high speed, and the temperature of the copper rotor is high due to the resistance effect during rotation, so the strength requirements for the end ring are also high. The connection method between the end ring and the copper strip provided in the patent CN107508393A is easy to process, but the strength of the end ring cannot meet the requirements in actual use, resulting in the actual use effect of the end ring produced by the method in the patent CN107508393A being poor.

The embodiment of the present application also provides a manufacturing process for manufacturing the energy-saving and efficient high-frequency submersible motor as described above. The manufacturing process includes S110 to S140, and S110 to S140 will be described in detail below.

S110. Stack silicon steel sheets to make an iron core 11. The iron core 11 is provided with a shaft hole 111 and a closed slot 112. Install the motor shaft 12 into the shaft hole 111 and insert the copper bar 13 into the closed slot 112. The strips 13 protrude from both ends of the iron core 11 .

Figure 2 is a schematic structural diagram of the rotor of an energy-saving and efficient high-frequency submersible motor during production in the embodiment of the present application. Figure 3 is a partial structural diagram of the A position of the rotor of the high-frequency submersible motor in production in Figure 2, as shown in As shown in Figures 2 and 3, structurally, the shaft hole 111 provided on the iron core 11 is used to install the motor shaft 12, and the closed slot 112 provided on the iron core 11 is used to install the copper bar 13. The copper bar 13 The two ends of the protruding iron core 11 are arranged to facilitate subsequent processing of the end rings 14 on the copper bar 13 .

S120. Install heat shield plates 113 at both ends of the iron core 11, and install a forming ring 114 that matches the heat shield plate 113 on the motor shaft 12. One end of the forming ring 114 is sleeve-connected to the heat shield plate 113. The forming ring The other end of 114 is sleeve-connected to the motor shaft 12. A molding cavity 115 is formed between the heat insulation plate 113 and the molding ring 114, and copper particles are filled into the molding cavity 115.

As shown in FIGS. 2 and 3 , structurally, heat insulation plates 113 respectively installed at both ends of the iron core 11 are used to perform heat insulation treatment on the iron core 11 . The forming ring 114 installed on the motor shaft 12 is used to form the end ring 14. The heat insulation plate 113 and the forming ring 114 cooperate with each other to form the end ring 14.

When in use, firstly, the heat shielding plate 113 is sleeved on the motor shaft 12, then one end of the forming ring 114 is connected to the heat shielding plate 113, and the other end of the forming ring 114 is sleeved and connected to the motor shaft. 12, so that a molding cavity 115 is formed between the heat insulation plate 113 and the molding ring 114, and the molding cavity 115 is used to mold the end ring 14.

When producing the end ring 14, copper particles can be filled into the molding cavity 115. After the copper particles are melted, the end ring 14 can be formed.

S130. Connect the two ends of the motor shaft 12 to the rotating end 21 respectively, and heat the copper particles to a molten state through the induction coil 22 in the circumferential direction of the forming ring 114.

As shown in FIGS. 2 and 3 , in terms of structure, by connecting the rotating ends 21 to both ends of the motor shaft 12 respectively, the driving of both ends of the motor shaft 12 can be achieved through the rotating ends 21 .

When in use, the copper particles are first heated to a molten state through the induction coil 22 in the circumferential direction of the forming ring 114, and then the two ends of the motor shaft 12 can be driven by the rotating end 21, thereby realizing that the motor shaft 12 drives the melt when rotating. The state copper particles are formed by centrifugal force.

For example, the rotating ends 21 can be two synchronously driven rotating base structures. The rotating ends 21 can be the two ends of the machine tool. The two rotating ends 21 can be relatively close or far away, so that the motor shaft can be rotated through the two rotating ends 21 . 12 to clamp for fixation, or remove the motor shaft 12 from between the two rotating ends 21. At the same time, when the two rotating ends 21 rotate, the motor shaft 12 can be driven to rotate.

S140. The two rotating ends 21 drive the motor shaft 12 to rotate. After forming the end ring 14 under the action of centrifugal force, remove the forming ring 114 and clean and reshape the end ring 14.

As shown in Figures 2 and 3, when in use, the two rotating ends 21 drive the motor shaft 12 to rotate, and the end ring 14 is formed under the action of centrifugal force, so that the end ring 14 with a tight texture can be obtained.

During use, after the forming ring 114 is removed, the heat insulation plate 113 continues to remain on the end surface of the iron core 11, and the end ring 14 is cleaned and shaped to obtain the squirrel cage structure of the finished copper rotor.

The beneficial effect brought by the above implementation method is that the motor shaft is insulated by the heat insulation plate, and the heat insulation effect of the motor shaft is ensured by the heat insulation plate, which facilitates heating of the copper particles and forming the end ring at high temperature.

The beneficial effect brought by the above-mentioned implementation method is that the end ring is formed through the heat insulation plate and the forming ring together, and then the end ring can be formed through the mold composed of the heat insulation plate and the forming ring, which facilitates rapid production and processing, and also can The end rings are produced with high precision. At the same time, the end ring is formed under the action of centrifugal force, which can discharge bubbles and other impurities in the copper liquid, improving the molding quality of the end ring.

In some implementations, a spring 23 is connected to the end surface of each rotating end 21 , and the spring 23 is used to abut the forming ring 114 against the end surface of the iron core 11 .

As shown in Figures 2 and 3, when in use, a spring 23 is connected to the end surface of each rotating end 21, and the spring 23 can provide pressure to the outside in a compressed state.

When in use, the spring 23 contacts the forming ring 114 against the end surface of the iron core 11 , and the spring 23 rotates with the rotating end 21 , so that the rotating end 21 can drive the spring 23 to rotate during the rotation, and can keep the spring 23 The forming ring 114 is in a clamped state.

The beneficial effect brought by the above implementation method is that the spring limits the position of the forming ring, ensuring the lateral pressure of the forming ring when forming the end ring, ensuring the molding quality of the end ring and the safety of the entire production equipment during operation. Stability ensures the safety of the production process.

In some implementations, the heat insulation plate 113 is annular, and a heat insulation pipe 113a is provided in the middle of the heat insulation plate 113. The heat insulation pipe 113a is used to be sleeve-connected to the motor shaft 12, and the end of the heat insulation pipe 113a is molded. Circle 114 abuts.

As shown in FIGS. 2 and 3 , the annular heat insulation plate 113 can insulate the iron core 11 on the end surface of the iron core 11 .

As shown in Figures 2 and 3, the heat-insulating tube 113a is sleeve-connected to the motor shaft 12, so that the heat-insulating tube 113a disposed in the middle of the heat-insulating plate 113 can insulate the motor shaft 12 and insulate the motor shaft 12 from the heat. The plates 113 cooperate with each other to insulate the iron core 11 and the motor shaft 12 together.

When in use, the end of the heat insulating tube 113a is in contact with the forming ring 114, which can ensure the sealing between the heat insulating tube 113a and the forming ring 114 and ensure that the copper liquid leaks out when the end ring 14 is formed.

In some implementations, an annular first step surface 114a and an annular second step surface 114b are respectively provided on the inner wall of one end of the forming ring 114 close to the iron core 11 , and the first step surface 114a is sleeve-connected to the iron core 11 , the second step surface 114b is sleeve-connected in the circumferential direction of the heat insulation plate 113 .

As shown in Figures 2 and 3, structurally, the first step surface 114a can cooperate with the iron core 11, so that the iron core 11 positions the forming ring 114 through the first step surface 114a.

As shown in Figures 2 and 3, structurally, the second step surface 114b is sleeved and connected in the circumferential direction of the heat insulation plate 113, so that the forming ring 114 positions the heat insulation plate 113 through the second step surface 114b, and The heat insulating plate 113 can be sealed from the circumferential direction by the second step surface 114b.

The beneficial effect brought by the above implementation method is that through the cooperation between the first step surface and the iron core, the forming ring is positioned through the iron core, thereby ensuring the stability of the forming ring. Moreover, through the cooperation between the second step surface and the heat insulation plate, the heat insulation plate is sealed in the circumferential direction, ensuring the sealing between the forming ring and the heat insulation plate, improving the construction quality of the end ring, and also avoiding the The liquid copper leaks from between the forming ring and the heat shielding plate, and the first step surface and the second step surface can jointly prevent the liquid copper from leaking from between the forming ring and the heat shielding plate, ensuring the safety of the molding process and the molding effect. .

In some implementations, the heat insulation board 113 is provided with an annular third step surface 114c on the opposite side of the second step surface 114b. The third step surface 114c is sleeve-connected with a fixing ring 24, and the fixing ring 24 is used for molding. The ends of the loop 114 are clamped circumferentially.

Figure 4 is a schematic structural diagram of the rotor of another energy-saving and efficient high-frequency submersible motor during production in the embodiment of the present application. Figure 5 is a partial structural schematic diagram of position B of the rotor of the high-frequency submersible motor in production in Figure 4. As shown in Figures 4 and 5, in terms of structure, the fixing ring 24 is sleeve-connected on the third step surface 114c, and the end of the forming ring 114 can be clamped from the circumferential direction by the fixing ring 24, which can improve the forming process. The end of the ring 114 is firmly fixed on the iron core 11 .

It should be noted that since the end of the forming ring 114 is clamped from the circumferential direction by the fixed ring 24, the forming ring 114 can be fixed on the iron core 11 from the end, so that there is a certain distance between the fixed ring 24 and the induction coil 22.

The beneficial effect brought by the above implementation method is that by setting the fixed ring on the third step surface, and the fixed ring presses the forming ring on the iron core, the stability of the forming ring installation can be further improved through the fixed ring. .

The beneficial effect brought by the above implementation method is that the forming ring is fixed on the iron core from the end, so that there is a certain distance between the fixed ring and the induction coil. This method of fixing presses the end of the forming ring on the iron core. , avoids the interference between the forming ring and the induction coil, improves the safety of the end ring during forming and the convenience of equipment installation.

In some implementations, the rotating end 21 includes a fixed base 211 and a vibration assembly 212. The vibration assembly 212 is used to vibrate the fixed base 211.

As shown in Figure 4, structurally, the fixed base 211 is provided with a fixing port. The rotating end 21 clamps and fixes the motor shaft 12 through the fixed port on the fixed seat 211. The vibration assembly 212 clamps and fixes the fixed seat 211. When vibrating, the vibration of the fixed base 211 can be transmitted to the motor shaft 12 , and then the vibration can be transmitted to the heat insulation plate 113 and the forming ring 114 through the motor shaft 12 .

In some implementations, the above-mentioned heating of copper particles to a molten state through the induction coil 22 in the circumferential direction of the forming ring 114 also includes: starting the induction coil 22 in the circumferential direction of the forming ring 114 to run for a first period of time, and starting the vibration component 212 During the second period of operation, the induction coil 22 in the circumferential direction of the forming ring 114 is started and continues to operate for the third period of time to heat the copper particles to a molten state.

As shown in Figure 4, during use, after the induction coil 22 in the circumferential direction of the forming ring 114 is started to operate for a first period of time, the copper material particles are heated for a first period of time. At this time, the copper material particles have begun to be heated and melted. , by starting the vibration assembly 212 to run for the second period, the tightness between the copper particles that begin to be heated and melted can be improved, the speed of the copper particles melting and merging with each other can be increased, and the friction between the melted copper particles can be initially discharged. bubble.

For example, the vibration assembly 212 may include a motor and an eccentric rotor fixedly connected to the motor.

For example, the first time period may be the time required to heat the copper particles until they begin to melt, and the length of the first time period may be 15 seconds.

For example, the length of the second period of time may be: When in use, the induction coil 22 in the circumferential direction of the forming ring 114 is continued to be started to continue running for the third period of time to heat the copper particles to a molten state, and by preliminarily discharging the molten After the bubbles are formed between the copper particles, by continuing to heat the copper particles, the copper particles can be heated to a completely molten state, thereby facilitating the subsequent forming of the end ring 14 .

For example, the third time period may be the time required to heat the copper particles to complete melting, and the length of the third time period may be 30 s.

In some implementations, driving the motor shaft 12 to rotate through the two rotating ends 21 to form the end ring 14 under the action of centrifugal force also includes: driving the motor shaft 12 to rotate at a first speed through the two rotating ends 21 for a fourth period of time, The vibration component 212 is started to run for a fifth period of time, and the two rotating ends 21 drive the motor shaft 12 to rotate at the second speed for a sixth period of time.

When in use, the two rotating ends 21 drive the motor shaft 12 to rotate at the first speed for a fourth period of time, thereby driving the copper liquid to rotate at the first speed to perform preliminary centrifugal shaping of the copper liquid, and to preliminarily shape the end ring 14 .

For example, the value of the first speed may be 50 r/min.

For example, the length of the fourth time period may be 1 minute.

When in use, the vibration assembly 212 is started to run for a fifth period of time, so that the vibration assembly 212 can vibrate the heat insulation plate 113 and the forming ring 114 on the motor shaft 12 to vibrate the heat insulation plate 113 and the forming ring 114 . The molten copper vibrates, so that the bubbles in the molten copper between the heat insulation plate 113 and the forming ring 114 are initially discharged after the fourth time period, and then the bubbles in the molten copper are further discharged.

For example, the length of the fifth time period may be 10 seconds.

During use, after the bubbles in the copper liquid are discharged through the third time period and the fourth time period, the motor shaft 12 can be driven to rotate at the second speed through the two rotating ends 21 for the sixth time period, and the liquid copper can be further driven to rotate. The centrifugal forming of the end ring 14 is realized.

Illustratively, the second speed is 2 times to 5 times the first speed.

Illustratively, the value of the second speed may be 100 r/min, 200 r/min or 250 r/min.

For example, the length of the sixth time period may be 2 minutes.

The beneficial effect brought by the above implementation method is that by first melting the copper particles, then vibrating them through the vibration assembly, and then continuing to melt the copper particles, the remaining bubbles during the melting process of the copper liquid can be discharged through the vibration assembly, which improves the The effect of discharging bubbles during the process of melting molten copper improves the molding quality of the end ring.

The beneficial effect brought by the above-mentioned implementation method is that in the process of forming the end ring, the copper liquid is first centrifugally formed, and then the vibration component is used to drive the copper liquid to vibrate, and then the copper liquid is continued to be centrifugally formed, which can The vibration component improves the compactness of the molten copper when molding it, improves the discharge effect of bubbles during the centrifugal molding process of the molten copper, improves the molding quality and tightness of the end ring, and improves the motor The service life of the rotor.

In some implementations, the end of the forming ring 114 close to the rotating end 21 is provided with heat dissipation fins 114d, and the heat dissipation fins 114d are arranged along the axial direction of the motor shaft 12.

Figure 6 is a partial structural schematic diagram of the rotor of another high-frequency submersible motor in production in the embodiment of the present application. As shown in Figure 6, structurally, the heat dissipation fins 114d are used to dissipate heat from the forming ring 114. , the heat of the forming ring 114 can be dissipated through the heat dissipation fins 114d, so as to increase the heat dissipation speed of the end ring 14 in the forming ring 114.

In some implementations, the above-mentioned manufacturing process further includes: after driving the motor shaft 12 through the two rotating ends 21 to rotate at the second speed for a sixth period of time, continuing to drive the motor shaft 12 through the two rotating ends 21 to rotate at a third speed. Turn the seventh time period.

As shown in FIG. 6 , during use, after the motor shaft 12 is driven to rotate at the second speed for a sixth period of time through the above-mentioned two rotating ends 21 , the forming of the end ring 14 is completed at this time. Then, the two rotating ends 21 drive the motor shaft 12 to rotate at a third speed for a seventh time period to cool the end ring 14 and increase the production speed of the end ring 14 .

For example, the length of the seventh time period may be 5 minutes.

For example, the third speed may be 10 r/min.

Illustratively, the third speed is 1/8 to 1/5 of the first speed.

The beneficial effect brought by the above implementation method is that the heat dissipation fins are used to dissipate heat from the end ring after the end ring is formed, and thereby the cooling speed of the end ring can be increased through the heat dissipation fins. At the same time, by driving the rotation of the motor shaft 12 to drive the forming ring 114 to rotate, the heat dissipation effect of the heat dissipation fins in the air can be improved, and the cooling speed of the end ring can be further increased through the rotation of the heat dissipation fins, thereby improving the effectiveness of the end ring. Production speed.

In some implementations, the outer wall of the heat insulating tube 113a is tapered, and the outer diameter of the heat insulating tube 113a gradually increases from the forming ring 114 to the heat insulating plate 113.

Figure 6 is a partial structural schematic diagram of the rotor of another high-frequency submersible motor in production in the embodiment of the present application. As shown in Figure 6, structurally, the outer wall of the heat insulation tube 113a is tapered, and The outer diameter of the heat insulation tube 113a gradually increases from the forming ring 114 to the heat insulation plate 113, so that when the end ring 14 is formed, in the cavity of the forming end ring 14, the heat insulation tube 113a is close to one end of the forming ring 114. The centerline of the motor shaft 12 is smaller, so that the copper liquid can fully fill the side close to the heat insulation plate 113 on the outer wall of the heat insulation tube 113a under the action of centrifugal force. At the same time, the copper liquid forms during the process of forming the end ring 14 The cavity remains on the side of the heat insulation tube 113a close to the forming ring 114.

In some implementations, the above-mentioned cleaning and shaping of the end ring 14 includes: removing pores and defective structures between the end ring 14 and the heat insulation tube 113a. The removed pores and defective structures are in the end ring 14 An oil groove 115a is formed on the top. Among them, when removing pores and defective structures, 1/4 to 1/3 of the length of the heat insulating tube 113a is removed.

As shown in FIG. 6 , during use, the pores and defective structures between the end ring 14 and the insulating tube 113 a are removed by material processing, so that the pores and defective structures can be removed during the process of forming the end ring 14 , so that the overall structure of the end ring 14 can avoid resistive losses caused by pores and defective structures.

At the same time, the removed pores and defective structures form an oil groove 115a on the end ring 14. The oil groove 115a can accommodate the cooling oil in the sealed motor, thereby improving the heat dissipation effect of the rotor 1 of the motor through the cooling oil in the oil groove 115a.

Among them, when removing pores and defective structures, remove 1/4 to 1/3 of the length of the heat insulation tube 113a. That is, when removing pores and defective structures, remove the pores and defective structures starting from one end of the heat insulation tube 113a. , until it reaches 1/4 to 1/3 of the length of the insulating tube 113a, it can ensure that the pores and defective structures are completely removed, and the effective removal of the pores and defective structures is achieved.

The beneficial effect brought by the above implementation method is that by removing the material at the center position, the remaining pores and defective structures are removed, which improves the molding quality of the center of the end ring and reduces the resistance of the end ring pores and defective structures. Consumption of electrical energy. At the same time, the removed pores and defective structures form an oil groove. The oil groove formed by the removed pores and defective structures accommodates the cooling oil, improves the circulation and heat dissipation speed of the cooling oil on the end ring, and improves the heat dissipation effect of the end ring.

In some implementations, the thickness of the heat insulation plate 113 gradually decreases from the center of the heat insulation plate 113 to the edge of the heat insulation plate 113. Protruding guide teeth 113b are provided on the circumferential direction of the heat insulation plate 113, and adjacent guide teeth 113b are provided in the circumferential direction. A guide groove 113c is formed between the flow teeth 113b, and the second step surface 114b and the flow guide teeth 113b are positioned in cooperation with each other.

Figure 7 is a partial structural schematic diagram of the rotor of another high-frequency submersible motor in production according to the embodiment of the present application. Figure 8 is a schematic left structural diagram of the rotor of another high-frequency submersible motor in the embodiment of the present application. As shown in Figures 7 and 8, structurally, the thickness of the heat insulation plate 113 gradually decreases from the center of the heat insulation plate 113 to the edge of the heat insulation plate 113. After the cooling oil is attached to the heat insulation plate 113, When the heat insulation plate 113 rotates, the cooling oil can be thrown away from the thickness of the heat insulation plate 113 from the center of the heat insulation plate 113 to the edge of the heat insulation plate 113, thereby improving the circulation effect of the cooling oil.

As shown in Figures 7 and 8, structurally, the heat insulation plate 113 is provided with protruding guide teeth 113b in the circumferential direction, and guide grooves 113c are formed between adjacent guide teeth 113b. The guide grooves 113c are The groove structure can accommodate cooling oil, so that after the flow guide groove 113c accommodates the cooling oil, when the heat insulation plate 113 rotates, the cooling oil can be thrown out from the flow guide groove 113c through the flow guide groove 113c on the heat insulation plate 113, thereby improving This increases the circulation speed of the cooling oil on the guide groove 113c in the sealed motor, thereby increasing the cooling speed of the motor's rotor.

Structurally, the second step surface 114b of the forming ring 114 and the guide teeth 113b are positioned in cooperation with each other, so that the forming ring 114 can position and seal the heat shield 113 through the cooperation of the second step surface 114b and the guide teeth 113b. The sealing performance between the heat insulation plate 113 and the forming ring 114 is improved, and the production effect of the end ring 14 is improved.

The beneficial effect brought by the above implementation method is that the thickness of the heat insulation board gradually decreases from the center to the edge, so that the heat insulation board can better throw the cooling oil to the surroundings of the heat insulation board, and then separate the heat insulation board and the heat insulation board. The heat on the end ring is taken out, which improves the heat dissipation effect of the heat shield and the end ring. At the same time, guide teeth are provided on the edge of the heat shield, and guide grooves are formed between the guide teeth, so that the heat shield also plays a role in circulating the cooling oil in the motor through the guide teeth.

The beneficial effect brought by the above implementation method is that the second step surface and the guide teeth cooperate with each other to position and seal the heat insulation plate, improve the sealing between the heat insulation plate and the forming ring, and improve the end ring. production effect.

In some implementations, the heat shielding plate 113 is made of heat insulating material, and an insulating coating is coated between the heat shielding plate 113 and the iron core 11 .

Structurally, the heat shielding plate 113 is made of heat insulating material, so that the heat shielding plate 113 can maintain the insulation effect of the end ring 14 and the iron core 11 during use of the motor.

At the same time, an insulating coating is applied between the heat shielding plate 113 and the iron core 11, which can further ensure the insulation effect between the heat shielding plate 113 and the iron core 11.

The beneficial effect brought by the above implementation method is to insulate between the heat shield and the end ring, avoid electrical conduction between the end ring and the iron core, reduce strays caused by the iron core, and improve the working efficiency of the motor. .

The embodiment of the present application also provides an energy-saving and efficient high-frequency submersible pump. Figure 9 is a schematic structural diagram of an energy-saving and efficient high-frequency submersible pump in the embodiment of the present application. As shown in Figure 9, the high-frequency submersible pump The pump includes a high-frequency submersible motor as described above. The high-frequency submersible pump also includes an impeller 31 and a pump body 32. The impeller 31 is installed in the pump body 32. The high-frequency submersible motor drives the impeller 31 to rotate.

Figure 10 is a schematic structural diagram of another energy-saving and efficient high-frequency submersible pump in the embodiment of the present application. As shown in Figure 9, the high-frequency submersible pump includes the high-frequency submersible motor as described above. The high-frequency submersible pump It also includes an impeller 31 and a pump body 32. The impeller 31 is installed in the pump body 32, and the high-frequency submersible motor drives the impeller 31 to rotate.

It should be noted that high-frequency submersible motors can be used on either axial-flow submersible pumps or centrifugal submersible pumps. The energy-saving and efficient high-frequency submersible pump shown in Figure 9 is an axial-flow submersible pump. The energy-saving and efficient high-frequency submersible pump shown in Figure 10 is a centrifugal submersible pump. The embodiment of the present application does not limit the blade form of the high-frequency submersible pump used in the high-frequency submersible motor.

The beneficial effect brought by the above implementation method is that by using the high frequency submersible motor in the above implementation method in the submersible pump, the submersible pump does not need to be used with a frequency conversion control cabinet, which reduces the cost of the submersible pump and improves the performance of the submersible pump. Ease of use. At the same time, by directly using the high-frequency power supply of the generator, the head and power of the submersible pump can be increased compared to the mains-driven submersible pump on the same structural parameters.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (7)

1. The manufacturing process of the energy-saving and efficient high-frequency submersible motor is characterized by comprising the following steps of:

the method comprises the steps of superposing silicon steel sheets to manufacture an iron core (11), wherein an axle hole (111) and a closed slot (112) are formed in the iron core (11), a motor shaft (12) is arranged in the axle hole (111), a copper bar (13) is inserted into the closed slot (112), and the copper bar (13) protrudes out of two ends of the iron core (11);

the method comprises the steps that heat insulation plates (113) are respectively arranged at two ends of an iron core (11), a forming ring (114) matched with the heat insulation plates (113) is arranged on a motor shaft (12), one end of the forming ring (114) is connected to the heat insulation plates (113) in a sleeved mode, the other end of the forming ring (114) is connected to the motor shaft (12) in a sleeved mode, a forming cavity (115) is formed between the heat insulation plates (113) and the forming ring (114), and copper particles are filled in the forming cavity (115);

Two ends of the motor shaft (12) are respectively connected to a rotating end (21), and the copper particles are heated to a molten state through an induction coil (22) in the circumferential direction of the forming ring (114);

the motor shaft (12) is driven to rotate through the two rotating ends (21), after the end ring (14) is formed under the action of centrifugal force, the forming ring (114) is taken down, and the end ring (14) is cleaned and shaped.

2. The process for manufacturing the energy-saving and efficient high-frequency submersible motor according to claim 1, wherein a spring (23) is connected to an end face of each rotating end (21), and the spring (23) is used for abutting the forming ring (114) on an end face of the iron core (11).

3. The process for manufacturing the energy-saving and efficient high-frequency submersible motor according to claim 2, wherein the heat insulation plate (113) is annular, a heat insulation pipe (113 a) is arranged in the middle of the heat insulation plate (113), the heat insulation pipe (113 a) is used for being connected to the motor shaft (12) in a sleeved mode, and the end portion of the heat insulation pipe (113 a) is abutted to the forming ring (114);

the shaping circle (114) is close to be equipped with annular first step face (114 a) and annular second step face (114 b) on the one end inside wall of iron core (11) respectively, first step face (114 a) cup joints and connects on iron core (11), second step face (114 b) cup joints and connects in the circumference of heat insulating board (113).

4. A process for manufacturing an energy-saving and efficient high-frequency submersible motor according to claim 3, wherein the heat insulation plate (113) is provided with a ring-shaped third step surface (114 c) on the opposite side of the second step surface (114 b), a fixing ring (24) is connected to the third step surface (114 c) in a sleeved mode, and the fixing ring (24) is used for clamping the tail end of the forming ring (114) from the circumferential direction.

5. The process for manufacturing an energy-efficient high-frequency submersible motor according to claim 4, wherein the rotating end (21) comprises a fixed seat (211) and a vibration assembly (212), and the vibration assembly (212) is used for vibrating the fixed seat (211);

heating the copper particles to a molten state by an induction coil (22) in the circumferential direction of the forming ring (114), further comprising:

starting an induction coil (22) in the circumferential direction of the forming ring (114) to operate for a first time period, starting the vibration assembly (212) to operate for a second time period, starting the induction coil (22) in the circumferential direction of the forming ring (114) to continue to operate for a third time period, and heating the copper particles to a molten state;

the motor shaft (12) is driven to rotate through the two rotating ends (21), and the end ring (14) is formed under the action of centrifugal force, and the motor further comprises:

Driving the motor shaft (12) to rotate at a first speed for a fourth period of time through the two rotating ends (21), starting the vibration assembly (212) to operate for a fifth period of time, and driving the motor shaft (12) to rotate at a second speed for a sixth period of time through the two rotating ends (21); wherein the second speed is 2 to 5 times the first speed.

6. The process for manufacturing the energy-saving and efficient high-frequency submersible motor according to claim 5, wherein the end of the forming ring (114) close to the rotating end (21) is provided with a heat radiation fin (114 d), and the heat radiation fin (114 d) is arranged along the axial direction of the motor shaft (12); the manufacturing process further comprises:

continuing to drive the motor shaft (12) to rotate at a third speed for a seventh period of time through the two rotating ends (21) after the motor shaft (12) is driven to rotate at the second speed for the sixth period of time through the two rotating ends (21); wherein the third speed is 1/8 to 1/5 of the first speed.

7. The process for manufacturing an energy-efficient high-frequency submersible motor according to claim 6, wherein an outer side wall of the heat insulation pipe (113 a) is tapered, and an outer diameter of the heat insulation pipe (113 a) is gradually increased from the molding ring (114) to the heat insulation board (113); cleaning and shaping the end ring (14), comprising:

Removing material from the air holes and defect structures between the end ring (14) and the heat insulation pipe (113 a), wherein the removed air holes and defect structures form oil grooves (115 a) on the end ring (14); wherein, when the air holes and the defective structure are removed, 1/4 to 1/3 of the length of the heat insulation pipe (113 a) is removed.