Segmented multi-stage cooling water filling type permanent magnet submersible motor

Abstract

The utility model discloses a segmented multistage cooling water filling type permanent magnet submersible motor in the technical field of submersible motors, which comprises a stator mechanism and a rotor mechanism, the rotor mechanism penetrates into an axial hole of the stator mechanism, a plurality of bearings are connected between the rotor mechanism and the stator mechanism, the stator mechanism comprises an upper cooler, and a lower cooler is connected between the upper cooler and the rotor mechanism. An upper guide bearing outer ring is fixedly connected to the middle of the bottom of the upper cooler, an upper stator iron core is connected to the bottom of the upper cooler, a coil groove is formed in the upper stator iron core, an upper stator winding is embedded in the coil groove, and through the multiple sets of coolers, the problem that stable and safe operation of the submersible motor cannot be achieved due to the poor heat dissipation effect is conveniently solved; and through the stator cooling mechanism, the stator windings and the stator iron cores in the upper casing and the lower casing can be cooled conveniently, and the situation that parts in the stator are difficult to cool effectively only through a cooler after long-term use, so that normal use of the device is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible motors, in particular to a water-filled permanent magnet submersible motor with segmented multi-stage cooling. Background Art

[0002] Submersible motor is a motor that works submerged in water. When connected to a submersible pump, it can pump out groundwater from wells or water from rivers, lakes and seas. It is widely used in farmland irrigation, urban water supply and water use for urban and rural residents, drainage of industrial and mining enterprises and urban and rural construction, and sewage treatment in cities or factories.

[0003] A water-filled permanent magnet submersible motor with segmented multi-stage cooling with announcement number CN117411244B belongs to the technical field of submersible motors. The present invention includes a stator assembly and a rotor assembly, characterized in that the rotor assembly is inserted into the axial hole of the stator assembly, a plurality of bearings are connected between the rotor assembly and the stator assembly, a stator core of the stator assembly is provided with coil slots and a stator winding is embedded, a housing is nested outside the stator core and multi-stage coolers are arranged at intervals, the stator core includes an upper stator core and a lower stator core, the housing includes an upper housing and a lower housing, the upper housing is nested outside the upper stator core, the lower housing is nested outside the lower stator core, and the multi-stage cooler includes an upper cooler, a middle cooler, a lower cooler and a tail cooler. The present invention can solve the problem in the prior art that submersible motors cannot achieve stable and safe operation due to poor heat dissipation. Although the above device solves the problem in the prior art that submersible motors cannot achieve stable and safe operation due to poor heat dissipation, the stator is the core part of the motor, and the most heat is generated inside it. During long-term use, when the heat is only dissipated by a refrigerator, the stator part will overheat, thereby affecting the normal use of the device. Therefore, it is necessary to provide a new water-filled permanent magnet submersible motor with segmented multi-stage cooling to solve the above technical problems. Utility Model Content

[0004] Therefore, the purpose of the utility model is to provide a water-filled permanent magnet submersible motor with segmented multi-stage cooling, which can solve the problem that the stator part of the existing device is overheated when it is only cooled by a single refrigerator during long-term use, thereby affecting the normal use of the device. In order to solve the above technical problems, the utility model provides a water-filled permanent magnet submersible motor with segmented multi-stage cooling, which adopts the following technical solutions: A water-filled permanent magnet submersible motor with segmented multi-stage cooling, including a stator mechanism and a rotor mechanism,

[0005] The rotor mechanism is inserted into the axial hole of the stator mechanism, a plurality of bearings are connected between the rotor mechanism and the stator mechanism, the stator mechanism comprises an upper cooler, an upper guide bearing outer ring is fixedly connected to the middle of the bottom of the upper cooler, an upper stator core is connected to the bottom of the upper cooler, a coil slot is provided on the upper stator core and an upper stator winding is embedded therein, an upper casing is connected to the bottom of the upper stator core, a lower stator core is connected to the bottom of the upper casing, a coil slot is provided on the lower stator core and a lower stator winding is embedded therein, a middle cooler is installed at the bottom of the inner cavity of the upper casing, the bottom of the lower stator core is connected to the lower casing, and a magnetic isolation block is installed at the front end of the lower casing;

[0006] A stator cooling mechanism, the stator cooling mechanism includes a water tank installed in the inner cavity of the upper casing and the lower casing, a water inlet pipe is inserted at the left side of the upper end of the water tank, a first water pump is installed at the bottom of the water inlet pipe, a circulating cooling liquid chamber is connected to the left side of the first water pump, a water outlet pipe is inserted at the right side of the bottom of the circulating cooling liquid chamber, a second water pump is connected to the right side of the water outlet pipe, and the right side of the second water pump is connected to the water tank, a lower cooler is connected to the bottom of the lower casing, a lower guide bearing outer ring is fixedly connected to the front end of the lower cooler, a thrust bearing fixing part is installed in the inner cavity of the lower cooler, a tail cooler is connected to the bottom of the lower cooler, a pressure regulating bag is installed in the inner cavity of the tail cooler, and a base is installed at the bottom of the tail cooler.

[0007] By adopting the above technical scheme and providing multiple groups of coolers, it is easy to solve the problem that the submersible motor cannot achieve stable and safe operation due to poor heat dissipation effect. By providing a stator cooling mechanism, it is easy to cool the stator winding and the stator core in the upper casing and the lower casing to avoid long-term use. It is difficult to effectively cool the internal components of the stator only by the cooler, thereby affecting the normal use of the device. By providing a rotor mechanism, it is easy for the device to drive the connected device to rotate.

[0008] Optionally, the magnetic isolation block is made of high-strength nylon material.

[0009] By adopting the above technical solution, the magnetic isolation block is made of high-strength nylon material. The nylon material has good magnetic isolation performance, high strength and wear resistance, as well as good heat resistance and insulation performance, which can improve the use effect and life of the magnetic isolation block.

[0010] Optionally, a through hole is opened in the middle of the water tank, and valves are installed at the upper end of the water inlet pipe and the lower end of the water outlet pipe.

[0011] By adopting the above technical solution, a through hole is opened in the middle of the water tank, which is convenient for the installation of the device without affecting the normal rotation of the rotor mechanism. Valves are installed at the upper end of the water inlet pipe and the lower end of the water outlet pipe to facilitate the control of the flow of the circulating cooling liquid chamber and the water stored in the water tank.

[0012] Optionally, the upper cooler is provided with a blockable water inlet, the tail cooler is provided with a blockable water outlet, and the upper cooler, middle cooler, lower cooler and tail cooler are evenly provided with multiple groups of cooling water flow channels.

[0013] By adopting the above technical solution, a blockable water inlet is provided on the upper cooler, a blockable water outlet is provided on the rear cooler, and the cooler is evenly provided with multiple groups of cooling water flow channels, which facilitates water circulation inside the cooler and ensures the cooling effect of the cooler.

[0014] Optionally, the water inlet and the water outlet are both connected to the cooling water flow channel.

[0015] By adopting the above technical solution, the water inlet and the water outlet are connected to the cooling water flow channel, so that water can be supplied to the inside of multiple groups of cooling water flow channels at one time, thereby ensuring the effectiveness of cooling of the device.

[0016] Optionally, the rotor mechanism includes a rotating shaft, the bottom of the rotating shaft is connected to a rotor core, the upper and lower ends of the rotor core are sleeved with balance rings, the bottom of the rotor core is connected to a guide bearing inner ring, and the bottom of the guide bearing inner ring is installed with an internal pump wheel.

[0017] By adopting the above technical scheme, by providing a rotating shaft, it is convenient to drive the connecting device to rotate; by providing a rotor core, it is convenient to form a magnetic circuit system of the motor together with the stator core. When the motor is energized, a magnetic flux is formed between the rotor core and the stator core to provide power for the operation of the motor; by providing a balance ring, it is convenient to improve the dynamic performance of the equipment, reduce the imbalance of the rotating parts, and reduce the vibration and noise of the equipment during operation; by providing an inner ring of the guide bearing, it is convenient to support and guide the axial movement of the rotating shaft, bear the axial load, reduce friction and wear, and ensure the stable operation of the equipment; by providing an internal pump wheel, it is convenient to drive the turbine to rotate and convert the energy of the liquid into mechanical energy output.

[0018] Optionally, permanent magnets are embedded in the rotor core, and the surface of the rotor core is coated with anti-rust paint.

[0019] By adopting the above technical solution, permanent magnets are embedded in the rotor core, which is convenient for installation on the rotor, interacting with the stator winding to generate electromagnetic torque, driving the rotor to rotate, and the surface of the rotor core is coated with anti-rust paint, which facilitates rust protection of the rotor core.

[0020] In summary, the present invention has at least one of the following beneficial effects:

[0021] 1. The present application is provided with a stator cooling mechanism, which is installed in the inner cavity of the upper casing and the lower casing through a water tank, so as to facilitate cooling of the stator winding and the stator core in the upper casing and the lower casing, and avoid long-term use. It is difficult to effectively cool the internal components of the stator only by a cooler, thereby affecting the normal use of the present device. By providing a first water pump, a water inlet pipe, a second water pump and a water outlet pipe, it is convenient to circulate the internal water. By providing a circulating cooling liquid chamber, it is convenient to allow the heat-absorbing rear water to enter the circulating cooling liquid chamber, and by heat conversion with the lake water outside the motor, the heat-absorbing rear water is quickly cooled down, thereby ensuring the effectiveness of the cooling of the present device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the use state of the utility model;

[0024] Figure 2 This is a schematic diagram of the disassembly structure of the components of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the stator cooling mechanism of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the utility model.

[0027] Explanation of the reference numerals: 1. upper cooler; 101. middle cooler; 2. upper guide bearing outer ring; 3. upper stator winding; 4. upper stator core; 5. upper casing; 6. lower stator core; 7. magnetic isolation block; 8. lower casing; 9. stator cooling mechanism; 901. water tank; 902. water inlet pipe; 903. first water pump; 904. circulating cooling liquid chamber; 905. water outlet pipe; 906. second water pump; 10. lower stator Sub-winding; 11. Outer ring of lower guide bearing; 12. Lower cooler; 13. Fixed part of thrust bearing; 14. Tail cooler; 15. Pressure regulating bag; 16. Base; 17. Rotor mechanism; 1701. Rotating shaft; 1702. Balance ring; 1703. Rotor core; 1704. Inner ring of guide bearing; 1705. Internal pump wheel; 18. Water inlet; 19. Water outlet; 20. Permanent magnet; 21. Cooling water flow channel. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 The utility model is described in further detail.

[0029] Example 1, reference Figure 1 , Figure 2 and Figure 4 The utility model discloses a water-filled permanent magnet submersible motor with segmented multi-stage cooling, which can solve the problem that the stator part of the existing device is overheated when the device is only cooled by a single refrigerator during long-term use, thereby affecting the normal use of the device. The utility model includes a stator mechanism and a rotor mechanism 17.

[0030] The rotor mechanism 17 is inserted into the axial hole of the stator mechanism. A plurality of bearings are connected between the rotor mechanism 17 and the stator mechanism. The stator mechanism comprises an upper cooler 1. An upper guide bearing outer ring 2 is fixedly connected to the middle of the bottom of the upper cooler 1. An upper stator core 4 is connected to the bottom of the upper cooler 1. A coil slot is provided on the upper stator core 4 and an upper stator winding 3 is embedded therein. An upper casing 5 is connected to the bottom of the upper stator core 4. A lower stator core 6 is provided with a coil slot and a lower stator winding 10 is embedded therein. A middle cooler 101 is installed at the bottom of the inner cavity of the upper casing 5. A lower casing 8 is connected to the bottom of the lower stator core 6. A magnetic isolation block 7 is installed at the front end of the lower casing 8.

[0031] The stator cooling mechanism 9 includes a water tank 901 installed in the inner cavity of the upper casing 5 and the lower casing 8, a water inlet pipe 902 is inserted on the left side of the upper end of the water tank 901, a first water pump 903 is installed at the bottom of the water inlet pipe 902, a circulating cooling liquid chamber 904 is connected to the left side of the first water pump 903, a water outlet pipe 905 is inserted on the right side of the bottom of the circulating cooling liquid chamber 904, a second water pump 906 is connected to the right side of the water outlet pipe 905, and the right side of the second water pump 906 is connected to the water tank 901, a lower cooler 12 is connected to the bottom of the lower casing 8, a lower guide bearing outer ring 11 is fixedly connected to the front end of the lower cooler 12, a thrust bearing fixing part 13 is installed in the inner cavity of the lower cooler 12, a tail cooler 14 is connected to the bottom of the lower cooler 12, a pressure regulating bag 15 is installed in the inner cavity of the tail cooler 14, and a base 16 is installed at the bottom of the tail cooler 14.

[0032] Working principle: the upper cooler 1, the middle cooler 101, the lower cooler 12, the tail cooler 14, the water injection port 18, the water outlet 19 and the cooling water flow channel 21 constitute the overall cooling part of the device, which is convenient for solving the problem that the submersible motor cannot achieve stable and safe operation due to poor heat dissipation effect, and improves the effectiveness of the overall uniform heat dissipation of the device. The stator cooling mechanism 9 is convenient for cooling the stator winding and the stator core in the upper casing 5 and the lower casing 8 to avoid long-term use. It is difficult to effectively cool the internal components of the stator only through the cooler, thereby affecting the normal use of the device. The upper stator core 4, the upper stator winding 3, the lower stator core 6 and the lower stator winding 10, the stator The sub-core and the stator winding together constitute a magnetic circuit and circuit system in the motor, realize the mutual conversion between electrical energy and mechanical energy, and provide power for the operation of the motor. The upper guide bearing outer ring 2 and the lower guide bearing outer ring 11 are convenient for supporting and guiding the rolling elements, and together with the bearing inner ring, the rolling elements and the retaining frame, they form a complete rolling bearing. The thrust bearing fixing part 13 is convenient for limiting the axial displacement of the shaft system during use and transferring the load to the bearing seat or other supporting structures. The pressure regulating capsule 15 will deform when the volume of the water inside the motor changes due to thermal expansion and contraction, so that the pressure difference between the water inside and outside the motor is always kept at zero. The base 16 is convenient for sealing and installing the inside of the device.

[0033] Example 2, reference Figure 2 and Figure 3 In this embodiment, the problem that the stator part of the existing device is overheated when the heat is only dissipated by a single refrigerator during long-term use, thereby affecting the normal use of the device, is solved. The water-filled permanent magnet submersible motor with segmented multi-stage cooling also includes: the magnetic isolation block 7 is made of high-strength nylon material, a through hole is opened in the middle of the water tank 901, valves are installed at the upper end of the water inlet pipe 902 and the lower end of the water outlet pipe 905, a pluggable water injection port 18 is provided on the upper cooler 1, and a pluggable water outlet 19 is provided on the tail cooler 14. The upper cooler 1 and the middle cooler 1 01. The lower cooler 12 and the tail cooler 14 are evenly provided with multiple groups of cooling water channels 21. The water inlet 18 and the water outlet 19 are both connected to the cooling water channels 21. The rotor mechanism 17 includes a rotating shaft 1701. The bottom of the rotating shaft 1701 is connected to a rotor core 1703. The upper and lower ends of the rotor core 1703 are sleeved with balance rings 1702. The bottom of the rotor core 1703 is connected to a guide bearing inner ring 1704. The bottom of the guide bearing inner ring 1704 is installed with an internal pump wheel 1705. The rotor core 1703 is embedded with a permanent magnet 20, and the surface of the rotor core 1703 is coated with anti-rust paint.

[0034] Working principle: When in use, the water tank 901 is installed in the inner cavity of the upper casing 5 and the lower casing 8, which is convenient for cooling the stator winding and the stator core in the upper casing 5 and the lower casing 8 to avoid long-term use. It is difficult to effectively cool the internal components of the stator only by the cooler, which affects the normal use of the device. By providing a first water pump 903, a water inlet pipe 902, a second water pump 906 and a water outlet pipe 905, it is convenient to circulate the internal water. By providing a circulating cooling liquid chamber 904, it is convenient to let the heat-absorbing rear water enter the circulating cooling liquid chamber 904, and through heat conversion with the lake water outside the motor, the heat-absorbing rear water is quickly cooled to ensure the effectiveness of the cooling of the device. By providing a rotating shaft 170 1. It is convenient to drive the connecting device to rotate. By providing a rotor core 1703, it is convenient to form a magnetic circuit system of the motor together with the stator core. When the motor is powered on, a magnetic flux is formed between the rotor core 1703 and the stator core to provide power for the operation of the motor. By providing a balance ring 1702, it is convenient to improve the dynamic performance of the equipment, reduce the imbalance of the rotating parts, and reduce the vibration and noise of the equipment during operation. By providing a guide bearing inner ring 1704, it is convenient to support and guide the axial movement of the rotating shaft, bear the axial load, reduce friction and wear, and ensure the stable operation of the equipment. By providing an internal pump wheel 1705, it is convenient to drive the turbine to rotate and convert the energy of the liquid into mechanical energy output.

[0035] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A water-filled permanent magnet submersible motor with segmented multi-stage cooling, comprising a stator mechanism and a rotor mechanism (17), characterized in that: The rotor mechanism (17) is inserted into the axial hole of the stator mechanism, and a plurality of bearings are connected between the rotor mechanism (17) and the stator mechanism. The stator mechanism comprises an upper cooler (1), an upper guide bearing outer ring (2) is fixedly connected to the middle of the bottom of the upper cooler (1), an upper stator core (4) is connected to the bottom of the upper cooler (1), a coil slot is provided on the upper stator core (4) and an upper stator winding (3) is embedded therein, an upper housing (5) is connected to the bottom of the upper stator core (4), a lower stator core (6) is provided with a coil slot and a lower stator winding (10) is embedded therein, a middle cooler (101) is installed at the bottom of the inner cavity of the upper housing (5), a lower housing (8) is connected to the bottom of the lower stator core (6), and a magnetic isolation block (7) is installed at the front end of the lower housing (8); The stator cooling mechanism (9) comprises a water tank (901) installed in the inner cavity of the upper housing (5) and the lower housing (8), a water inlet pipe (902) is inserted on the left side of the upper end of the water tank (901), a first water pump (903) is installed on the bottom of the water inlet pipe (902), a circulating cooling liquid chamber (904) is connected to the left side of the first water pump (903), a water outlet pipe (905) is inserted on the right side of the bottom of the circulating cooling liquid chamber (904), and a second water pump (905) is connected to the right side of the water outlet pipe (905). 6), and the right side of the second water pump (906) is connected to the water tank (901), the bottom of the lower casing (8) is connected to a lower cooler (12), the front end of the lower cooler (12) is fixedly connected to the outer ring of the lower guide bearing (11), the inner cavity of the lower cooler (12) is installed with a thrust bearing fixing part (13), the bottom of the lower cooler (12) is connected to a tail cooler (14), the inner cavity of the tail cooler (14) is installed with a pressure regulating bag (15), and the bottom of the tail cooler (14) is installed with a base (16).

2. The water-filled permanent magnet submersible motor with segmented multi-stage cooling according to claim 1 is characterized in that: The magnetic isolation block (7) is made of high-strength nylon material.

3. The water-filled permanent magnet submersible motor with segmented multi-stage cooling according to claim 1 is characterized in that: A through hole is provided in the middle of the water tank (901), and valves are installed at the upper end of the water inlet pipe (902) and the lower end of the water outlet pipe (905).

4. The water-filled permanent magnet submersible motor with segmented multi-stage cooling according to claim 1 is characterized in that: The upper cooler (1) is provided with a pluggable water inlet (18), the rear cooler (14) is provided with a pluggable water outlet (19), and the upper cooler (1), the middle cooler (101), the lower cooler (12) and the rear cooler (14) are evenly provided with multiple groups of cooling water flow channels (21).

5. The water-filled permanent magnet submersible motor with segmented multi-stage cooling according to claim 4 is characterized in that: The water inlet (18) and the water outlet (19) are both in communication with the cooling water channel (21).

6. The water-filled permanent magnet submersible motor with segmented multi-stage cooling according to claim 1, characterized in that: The rotor mechanism (17) comprises a rotating shaft (1701), the bottom of the rotating shaft (1701) is connected to a rotor core (1703), the upper and lower ends of the rotor core (1703) are sleeved with balance rings (1702), the bottom of the rotor core (1703) is connected to a guide bearing inner ring (1704), and the bottom of the guide bearing inner ring (1704) is installed with an internal pump wheel (1705).

7. The water-filled permanent magnet submersible motor with segmented multi-stage cooling according to claim 6 is characterized in that: The rotor core (1703) is embedded with a permanent magnet (20), and the surface of the rotor core (1703) is coated with anti-rust paint.

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