Permanent magnet motor with hollow shaft structure for petroleum drilling pump

Abstract

The utility model discloses a permanent magnet motor with a hollow shaft structure for a petroleum drilling pump, which comprises a motor box, a motor stator is arranged in the motor box, a stator iron core is arranged in the motor stator, a winding is arranged outside the motor stator, a motor rotor is further rotatably arranged in the motor box, a rotor iron core is arranged in the motor rotor, and the rotor iron core is arranged outside the motor stator. The motor rotor is connected with a hollow rotating shaft, the hollow rotating shaft is rotatably arranged in the motor box, a fan is arranged at the top of the motor box, and an air inlet is formed in the bottom of the motor box; the stator iron core and the rotor iron core are both formed by laminating high-permeability low-loss cold-rolled silicon steel sheets. The permanent magnet motor with the hollow shaft structure for the petroleum drilling pump not only meets the requirement of an existing slurry pump for a motor installation space and effectively reduces the weight of the motor shaft, but also ensures the operation stability of the motor shaft, meanwhile, the sealing effect is good, the efficiency of the motor is improved, and energy conservation and high efficiency are achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil drilling equipment, specifically relating to a hollow shaft permanent magnet motor for oil drilling pumps. Background Technology

[0002] Under the national policy of vigorously promoting energy conservation, emission reduction, and carbon neutrality, domestic drilling companies are seeking drilling pump motors that can meet the needs of upgrading existing drilling pumps, improve efficiency, and save energy.

[0003] Compared with asynchronous motors, permanent magnet motors have significant advantages such as simple structure, reliable operation, small size, light weight, low loss, high efficiency, and flexible shape and size. As a result, they have a wide range of applications and have become a hot research topic in the field of oil drilling pumps in recent years. Utility Model Content

[0004] The purpose of this invention is to provide a hollow shaft permanent magnet motor for oil drilling pumps, which not only meets the existing requirements of mud pumps for motor installation space and effectively reduces the weight of the motor shaft, but also ensures the stability of motor shaft operation. At the same time, it has a good sealing effect, improves motor efficiency, and is energy-efficient.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a hollow shaft permanent magnet motor for oil drilling pumps, comprising a motor housing, a motor stator housed within the motor housing, a stator core housed within the stator, windings housed outside the stator, a motor rotor rotatably housed within the motor housing, a rotor core housed within the rotor, a hollow shaft connected to the motor rotor, the hollow shaft rotatably housed within the motor housing, a fan housed at the top of the motor housing, and an air inlet housed at the bottom of the motor housing; both the stator core and the rotor core are made of stacked high-permeability, low-loss cold-rolled silicon steel sheets.

[0006] As a preferred technical solution of this utility model, the number of fans is two, and the two fans are symmetrically arranged on the top of the motor box.

[0007] As a preferred technical solution of this utility model, the motor stator adopts H-class insulation high-strength energy-saving magnetic slot wedge.

[0008] As a preferred technical solution of this utility model, the air inlet is provided with an air filter box.

[0009] As a preferred technical solution of this utility model, the motor housing has a cylindrical structure.

[0010] As a preferred technical solution of this utility model, the motor box is provided with reinforcing support ribs.

[0011] As a preferred technical solution of this utility model, the bottom of the motor box is provided with multiple support legs.

[0012] As a preferred technical solution of this utility model, the motor rotor and the hollow shaft are rotatably mounted in the motor housing via bearings.

[0013] The beneficial effects of this utility model are: the hollow shaft permanent magnet motor for oil drilling pumps of this utility model has a simple overall structure and reliable operation; it is small in size and light in weight; it has low loss and high efficiency. At the same time, the hollow shaft design can not only meet the space requirements for upgrading existing drilling pumps, but also effectively reduce the weight of the motor, ensuring the efficient operation of the drilling mud pump. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a cross-sectional view of a hollow shaft permanent magnet motor for an oil drilling pump according to this utility model.

[0016] Figure 2 This is a front view of a hollow shaft permanent magnet motor for an oil drilling pump according to this utility model.

[0017] In the diagram, 1. Motor housing, 2. Stator core, 3. Motor stator, 4. Winding, 5. Motor rotor, 6. Rotor core, 7. Shaft, 8. Bearing, 9. Support leg, 10. Fan, 11. Air filter box. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] Example 1

[0021] like Figure 1 and Figure 2As shown, this utility model discloses a hollow shaft permanent magnet motor for an oil drilling pump, comprising a motor housing 1, a motor stator 3 inside the motor housing 1, a stator core 2 inside the motor stator 3, windings 4 outside the motor stator 3, a motor rotor 5 rotatably mounted inside the motor housing 1, a rotor core 6 inside the motor rotor 5, a hollow shaft 7 connected to the motor rotor 5, the hollow shaft 7 rotatably mounted inside the motor housing 1, a fan 10 at the top of the motor housing 1, and an air inlet at the bottom of the motor housing 1; both the stator core 2 and the rotor core 6 are made of stacked high-permeability, low-loss cold-rolled silicon steel sheets.

[0022] The motor housing 1, serving as the outer casing of this type of motor, is welded from low-temperature resistant steel plates. The stator core 2 is installed inside the motor stator 3, which in turn is installed inside the motor housing 1. The stator core 2 is made of high-permeability, low-loss cold-rolled silicon steel sheets, laminated together. A deburring process improves the lamination coefficient, effectively reducing eddy current losses between laminations and lowering electromagnetic noise and vibration. The motor stator 3 is externally fitted with shaped windings 4, incorporating corona-resistant H-class insulation material. VPI vacuum impregnation enhances the insulation strength of the windings 4 and the thermal conductivity of the motor stator core 3. The surfaces at both ends of the windings 4 are coated with conformal coating, improving the safety factor. The motor rotor 5 is fixed to the motor housing 1 via bearings 8 and is made of high-strength alloy steel that has undergone heat treatment. The rotor core 6 is assembled inside the motor rotor 5. The rotor core 6 and the hollow shaft 7 are welded together. To meet the installation space requirements of the oilfield mud pump, the hollow shaft 7 adopts a hollow shaft design. The hollow shaft 7 and the pump shaft of the mud pump are connected by a coupling. The rotor core 6 is made of high-permeability, low-loss cold-rolled silicon steel sheets. Before lamination, a deburring process is performed to improve the lamination lamination coefficient, which can reduce the electromagnetic noise and vibration of the motor. The rotor core 6 contains high-performance permanent magnets. These permanent magnets have high remanence, high coercivity, and high maximum operating temperature, ensuring that the motor has strong anti-demagnetization ability and high mechanical strength. The surface of the permanent magnets is galvanized to improve their corrosion resistance. High-performance bearings 8 are installed at both ends of the hollow shaft 7. These bearings 8 are rolling element guided, have a large oil gap, and a copper cage, and can withstand high torque impact loads. A high-efficiency, high-cooling fan 10 is installed on the top of the motor housing 1 to ensure effective cooling of the motor.

[0023] Example 2

[0024] like Figure 1 and Figure 2As shown, this utility model discloses a hollow shaft permanent magnet motor for an oil drilling pump, comprising a motor housing 1, a motor stator 3 inside the motor housing 1, a stator core 2 inside the motor stator 3, windings 4 outside the motor stator 3, a motor rotor 5 rotatably mounted inside the motor housing 1, a rotor core 6 inside the motor rotor 5, a hollow shaft 7 connected to the motor rotor 5, the hollow shaft 7 rotatably mounted inside the motor housing 1, two fans 10 symmetrically arranged on the top of the motor housing 1, and an air inlet at the bottom of the motor housing 1; both the stator core 2 and the rotor core 6 are made of stacked high-permeability, low-loss cold-rolled silicon steel sheets.

[0025] The motor housing 1, serving as the outer casing of this type of motor, is welded from low-temperature resistant steel plates. The stator core 2 is installed inside the motor stator 3, which in turn is installed inside the motor housing 1. The stator core 2 is made of high-permeability, low-loss cold-rolled silicon steel sheets, laminated together. A deburring process improves the lamination coefficient, effectively reducing eddy current losses between laminations and lowering electromagnetic noise and vibration. The motor stator 3 is externally fitted with shaped windings 4, incorporating corona-resistant H-class insulation material. VPI vacuum impregnation enhances the insulation strength of the windings 4 and the thermal conductivity of the motor stator core 3. The surfaces at both ends of the windings 4 are coated with conformal coating, improving the safety factor. The motor rotor 5 is fixed to the motor housing 1 via bearings 8 and is made of high-strength alloy steel that has undergone heat treatment. The rotor core 6 is assembled inside the motor rotor 5. The rotor core 6 and the hollow shaft 7 are welded together. To meet the installation space requirements of the oilfield mud pump, the hollow shaft 7 adopts a hollow shaft design. The hollow shaft 7 and the pump shaft of the mud pump are connected by a coupling. The rotor core 6 is made of high-permeability, low-loss cold-rolled silicon steel sheets. Before lamination, a deburring process is performed to improve the lamination lamination coefficient, which can reduce the electromagnetic noise and vibration of the motor. The rotor core 6 contains high-performance permanent magnets. These permanent magnets have high remanence, high coercivity, and high maximum operating temperature, ensuring that the motor has strong anti-demagnetization ability and high mechanical strength. The surface of the permanent magnets is galvanized to improve their corrosion resistance. High-performance bearings 8 are installed at both ends of the hollow shaft 7. These bearings 8 are rolling element guided, have a large oil gap, and a copper cage, and can withstand high torque impact loads. Two high-efficiency, high-power cooling fans 10 are installed on the top of the motor housing 1 to ensure effective cooling of the motor.

[0026] Example 3

[0027] like Figure 1 and Figure 2As shown, this utility model discloses a hollow shaft permanent magnet motor for an oil drilling pump, comprising a motor housing 1, a motor stator 3 inside the motor housing 1, a stator core 2 inside the motor stator 3, windings 4 outside the motor stator 3, a motor rotor 5 rotatably mounted inside the motor housing 1, a rotor core 6 inside the motor rotor 5, a hollow shaft 7 connected to the motor rotor 5, the hollow shaft 7 rotatably mounted inside the motor housing 1, two fans 10 symmetrically arranged on the top of the motor housing 1, and an air inlet at the bottom of the motor housing 1; both the stator core 2 and the rotor core 6 are made of high-permeability, low-loss cold-rolled silicon steel sheets, and the motor stator 3 uses H-class insulated, high-strength, energy-saving magnetic slot wedges.

[0028] The motor housing 1, serving as the outer shell of this type of motor, is constructed from low-temperature resistant steel plates welded into a cylindrical structure. Multiple reinforcing ribs run circumferentially inside the cylinder, increasing the strength of the base and creating an air duct. The stator core 2 is installed inside the motor stator 3, which is in turn installed inside the motor housing 1. The stator core 2 is made of high-permeability, low-loss cold-rolled silicon steel sheets, laminated together. A deburring process improves the lamination coefficient, effectively reducing eddy current losses between laminations and lowering electromagnetic noise and motor vibration. The motor stator 3 is externally fitted with shaped windings 4, incorporating corona-resistant Class H insulation material. VPI vacuum impregnation enhances the insulation strength of the windings 4 and the thermal conductivity of the motor stator core 3. The surfaces at both ends of the windings 4 are coated with a three-proof paint, improving the safety factor. The motor stator 3 uses H-class insulated high-strength energy-saving magnetic slot wedges, which makes the air gap magnetic field distribution more uniform, reduces magnetic field pulsation and stator iron loss, improves motor efficiency, and reduces motor temperature rise. The magnetic slot wedges also play a role in reducing motor noise and vibration. The motor rotor 5 is fixed to the motor housing 1 via bearings 8 and is made of high-strength alloy steel that has undergone quenching and tempering. The rotor core 6 is assembled inside the motor rotor 5. The rotor core 6 and the hollow shaft 7 are welded together. To meet the installation space requirements of the oilfield mud pump, the hollow shaft 7 adopts a hollow shaft design, and the hollow shaft 7 and the mud pump shaft are connected via a coupling. The rotor core 6 is made of high-permeability, low-loss cold-rolled silicon steel sheets. Before lamination, a deburring process is performed to improve the lamination lamination coefficient, which can reduce the electromagnetic noise and vibration of the motor. The rotor core 6 contains high-performance permanent magnets with high remanence, high coercivity, and high maximum operating temperature, ensuring strong anti-demagnetization capability and high mechanical strength. The permanent magnet surface is galvanized, improving its corrosion resistance. High-performance bearings 8 are mounted at both ends of the hollow shaft 7. These bearings are roller-guided, have a large oil clearance, and copper cages, enabling them to withstand high-torque impact loads. Two high-efficiency, high-power cooling fans 10 are mounted on the top of the motor housing 1 to ensure effective motor cooling.

[0029] Example 4

[0030] like Figure 1 and Figure 2 As shown, this utility model discloses a hollow shaft permanent magnet motor for an oil drilling pump, comprising a motor housing 1, a motor stator 3 inside the motor housing 1, a stator core 2 inside the motor stator 3, windings 4 outside the motor stator 3, a motor rotor 5 rotatably mounted inside the motor housing 1, a rotor core 6 inside the motor rotor 5, a hollow shaft 7 connected to the motor rotor 5, and the hollow shaft 7 rotatably mounted inside the motor housing 1. Two fans 10 are symmetrically arranged on the top of the motor housing 1, and an air inlet is provided at the bottom of the motor housing 1. The stator core 2 and the rotor core 6 are both made of high-permeability, low-loss cold-rolled silicon steel sheets, and the motor stator 3 uses H-class insulated, high-strength, energy-saving magnetic slot wedges. An air filter box 11 is provided at the air inlet.

[0031] The motor housing 1, serving as the outer shell of this type of motor, is constructed from low-temperature resistant steel plates welded into a cylindrical structure. Multiple reinforcing ribs run circumferentially inside the cylinder, increasing the strength of the base and creating an air duct. The stator core 2 is installed inside the motor stator 3, which is in turn installed inside the motor housing 1. The stator core 2 is made of high-permeability, low-loss cold-rolled silicon steel sheets, laminated together. A deburring process improves the lamination coefficient, effectively reducing eddy current losses between laminations and lowering electromagnetic noise and motor vibration. The motor stator 3 is externally fitted with shaped windings 4, incorporating corona-resistant Class H insulation material. VPI vacuum impregnation enhances the insulation strength of the windings 4 and the thermal conductivity of the motor stator core 3. The surfaces at both ends of the windings 4 are coated with a three-proof paint, improving the safety factor. The motor stator 3 uses H-class insulated high-strength energy-saving magnetic slot wedges, which makes the air gap magnetic field distribution more uniform, reduces magnetic field pulsation and stator iron loss, improves motor efficiency, and reduces motor temperature rise. The magnetic slot wedges also play a role in reducing motor noise and vibration. The motor rotor 5 is fixed to the motor housing 1 via bearings 8 and is made of high-strength alloy steel that has undergone quenching and tempering. The rotor core 6 is assembled inside the motor rotor 5. The rotor core 6 and the hollow shaft 7 are welded together. To meet the installation space requirements of the oilfield mud pump, the hollow shaft 7 adopts a hollow shaft design, and the hollow shaft 7 and the mud pump shaft are connected via a coupling. The rotor core 6 is made of high-permeability, low-loss cold-rolled silicon steel sheets. Before lamination, a deburring process is performed to improve the lamination lamination coefficient, which can reduce the electromagnetic noise and vibration of the motor. The rotor core 6 contains high-performance permanent magnets with high remanence, high coercivity, and high maximum operating temperature, ensuring strong anti-demagnetization capability and high mechanical strength. The permanent magnet surface is galvanized, improving its corrosion resistance. High-performance bearings 8 are mounted at both ends of the hollow shaft 7. These bearings are roller-guided, have a large oil gap, and a copper cage, enabling them to withstand high-torque impact loads. Two high-efficiency, powerful cooling fans 10 are mounted on the top of the motor housing 1 to ensure effective motor cooling. An air filter box 11 is installed below the motor base 1 to effectively filter incoming sand and insects, ensuring clean air inside the motor.

[0032] Example 5

[0033] Similar to Embodiment 4, Embodiment 5 includes a hollow shaft permanent magnet motor for an oil drilling pump, comprising a motor housing 1, a motor stator 3 housed within the motor housing 1, a stator core 2 housed within the motor stator 3, windings 4 externally mounted on the stator 3, a motor rotor 5 rotatably mounted within the motor housing 1, a rotor core 6 housed within the motor rotor 5, a hollow shaft 7 connected to the motor rotor 5, and the hollow shaft 7 rotatably mounted within the motor housing 1. Two fans 10 are symmetrically arranged on the top of the motor housing 1, and an air inlet is located at the bottom of the motor housing 1. Both the stator core 2 and the rotor core 6 are made of stacked high-permeability, low-loss cold-rolled silicon steel sheets. The motor stator 3 uses H-class insulated, high-strength, energy-saving magnetic slot wedges. An air filter box 11 is provided at the air inlet.

[0034] Unlike Embodiment 4, in Embodiment 5, the hollow shaft permanent magnet motor for an oil drilling pump of this utility model has a cylindrical structure for the motor housing 1, and reinforcing support ribs are provided inside the motor housing 1.

[0035] The motor housing 1, which serves as the outer shell of this type of motor, is made of low-temperature resistant steel plate welded into a cylindrical structure. There are multiple reinforcing support ribs in the circumferential direction inside the cylinder, which increases the strength of the base and forms an air duct to facilitate heat dissipation from all parts of the motor housing 1.

[0036] Example 6

[0037] Similar to Embodiment 5, Embodiment 6 includes a hollow shaft permanent magnet motor for an oil drilling pump, comprising a motor housing 1, a motor stator 3 inside the motor housing 1, a stator core 2 inside the motor stator 3, windings 4 outside the motor stator 3, a motor rotor 5 rotatably mounted inside the motor housing 1, a rotor core 6 inside the motor rotor 5, a hollow shaft 7 connected to the motor rotor 5, and the hollow shaft 7 rotatably mounted inside the motor housing 1. Two fans 10 are symmetrically arranged on the top of the motor housing 1, and an air inlet is located at the bottom of the motor housing 1. Both the stator core 2 and the rotor core 6 are made of stacked high-permeability, low-loss cold-rolled silicon steel sheets. The motor stator 3 uses H-class insulated, high-strength, energy-saving magnetic slot wedges. An air filter box 11 is provided at the air inlet. The motor housing 1 has a cylindrical structure and reinforcing ribs are provided inside the motor housing 1.

[0038] Unlike Embodiment 5, in the hollow shaft permanent magnet motor for oil drilling pumps of this utility model, the bottom of the motor housing 1 is provided with multiple support legs 9, which can ensure that the motor housing 1 is stably supported.

[0039] The foregoing description illustrates and describes several preferred embodiments of the utility model. However, as previously stated, it should be understood that the utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the utility model concept described herein through the foregoing teachings or the technology or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the utility model should be within the protection scope of the appended claims.

Claims

1. A hollow shaft permanent magnet motor for oil drilling pumps, characterized in that, The device includes a motor housing (1), a motor stator (3) is provided inside the motor housing (1), a stator core (2) is provided inside the motor stator (3), a winding (4) is provided outside the motor stator (3), a motor rotor (5) is rotatably provided inside the motor housing (1), a rotor core (6) is provided inside the motor rotor (5), a hollow shaft (7) is connected to the motor rotor (5), the hollow shaft (7) is rotatably provided inside the motor housing (1), a fan (10) is provided on the top of the motor housing (1), and an air inlet is provided on the bottom of the motor housing (1); the stator core (2) and the rotor core (6) are both made of high-permeability, low-loss cold-rolled silicon steel sheets stacked together.

2. The hollow shaft permanent magnet motor for oil drilling pumps according to claim 1, characterized in that, The number of the fans (10) is two, and the two fans (10) are symmetrically arranged on the top of the motor box (1).

3. The hollow shaft permanent magnet motor for oil drilling pumps according to claim 2, characterized in that, The motor stator (3) adopts H-class insulation high-strength energy-saving magnetic slot wedge.

4. The hollow shaft permanent magnet motor for oil drilling pumps according to claim 3, characterized in that, The air inlet is equipped with an air filter box (11).

5. The hollow shaft permanent magnet motor for oil drilling pumps according to claim 4, characterized in that, The motor housing (1) has a cylindrical structure.

6. The hollow shaft permanent magnet motor for oil drilling pumps according to claim 5, characterized in that, The motor housing (1) is equipped with reinforcing support ribs.

7. The hollow shaft permanent magnet motor for oil drilling pumps according to claim 6, characterized in that, The bottom of the motor housing (1) is provided with multiple support legs (9).

8. The hollow shaft permanent magnet motor for oil drilling pumps according to claim 6, characterized in that, The motor rotor (5) and the hollow shaft (7) are rotatably mounted in the motor housing (1) via bearings (8).

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