阅读说明：本技术 一种高速交直流永磁同步井用水泵电动机 (Water pump motor for high-speed alternating current-direct current permanent magnet synchronous well ) 是由 赵正康 于 2020-05-30 设计创作，主要内容包括：本发明涉及一种高速交直流永磁同步井用水泵电动机,包括机筒,机筒的一端设有骨架油封、防水室盖、橡胶垫,在骨架油封、防水室盖、橡胶垫的机筒端部的内腔依次设有机械密封组件、第一轴承座、防水室油囊、油囊压板、螺栓、定子总成、转子总成、转子轴伸缩调节板、第二轴承座、调节螺栓、驱动器、压差伸缩油囊、油囊盖和卡簧,本发明优益效果是：转速高达每分钟4000-10000转,在同等的扬程水泵叶轮的节数只需常规深井泵的三分之一,额定扬程200米,常规深井泵使用异步电动机所需叶轮要30节以上,而本发明只需要10节叶轮就可以满足要求,并采用上述构造彻底有效地解决了电动机内进水的难题。(The invention relates to a high-speed alternating current-direct current permanent magnet synchronous well water pump motor, which comprises a machine barrel, wherein one end of the machine barrel is provided with a framework oil seal, a waterproof chamber cover and a rubber pad, and a mechanical seal component, a first bearing seat, a waterproof chamber oil bag, an oil bag pressing plate, a bolt, a stator assembly, a rotor shaft telescopic adjusting plate, a second bearing seat, an adjusting bolt, a driver, a pressure difference telescopic oil bag, an oil bag cover and a snap spring are sequentially arranged in inner cavities at the end parts of the machine barrel of the framework oil seal, the waterproof chamber cover and the rubber pad, and the high-speed alternating: the rotating speed is as high as 4000-.)

1. The utility model provides a high-speed alternating current-direct current is water pump motor for permanent magnet synchronous well, includes barrel (1), and barrel (1) is a high-speed alternating current-direct current is water pump motor shell for permanent magnet synchronous well, its characterized in that: one end of the machine barrel (1) is provided with a framework oil seal (3), a waterproof chamber cover (4) and a rubber pad (5), a mechanical seal assembly (6), a first bearing seat (7), a waterproof chamber oil bag (8), an oil bag pressing plate (9), a bolt (10), a stator assembly (2), a rotor assembly (11), a rotor shaft telescopic adjusting plate (12), a second bearing seat (13), an adjusting bolt (14), a driver (15), a pressure difference telescopic oil bag (16), an oil bag cover (17) and a clamp spring (18) are sequentially arranged in inner cavities at the end parts of the machine barrel (1) of the framework oil seal (3), the waterproof chamber cover (4) and the rubber pad (5), the machine barrel (1) is composed of round pipes with unequal inner diameters, wherein the inner diameter of a first-stage round pipe (1 a) is D1, the inner diameter of a second-stage round pipe (1 b) is D2, the inner diameter of a third-stage round pipe (1 c) is D3), and the inner diameter of a fourth, the inner diameter of a fifth-stage circular tube (1 e) is D5, D1 is an enlarged port, the inner diameters of D2, D3 and D4 are equal, the inner diameter of D5 is larger than that of D4, the inner diameter of D5 is an assembly section of a clamp spring (18), a driver (15) is assembled in an inner cavity of the inner diameter D3 of a third-stage circular tube (1 c) of the machine barrel (1), a differential pressure telescopic oil bag (16) and an oil bag cover (17) are assembled in an inner cavity of D4 of a fourth-stage circular tube (1D) of the machine barrel (1), the clamp spring (18) is assembled in an inner cavity of D5 of the fifth-stage circular tube (1 e) of the machine barrel (1), the differential pressure telescopic oil bag (16) and the oil bag cover (17) are clamped in an inner cavity of D4 of the fourth-stage circular tube (1D) of the machine barrel (1) by the clamp spring (18), a second-stage circular tube (1 b) is assembled at the tail end of an inner cavity of a second-, the front end of a rotor assembly (11) is assembled with a first bearing seat (7), a waterproof chamber oil bag (8) and an oil bag pressing plate (9), then the tail end of the rotor assembly (11) after the tail end and the front end are assembled is placed on a second bearing seat (13) of a D2 inner cavity of a two-stage circular tube (1 b) of a machine barrel (1), a mechanical sealing assembly (6) is sleeved on the rotor assembly (11), a rubber pad (5) and a waterproof chamber cover (4) are sequentially assembled on the first bearing seat (7), and a framework oil seal (3) is assembled on the waterproof chamber cover (4) to form the high-speed alternating current/direct current permanent magnet synchronous well water pump motor.

2. The water pump motor for the high-speed alternating current-direct current permanent magnet synchronous well according to claim 1, is characterized in that: the mechanical seal assembly (6) is composed of a mechanical seal assembly shell (6 a), a locking screw (6 b), a wave spring (6 c), a baffle (6 d), an O-shaped seal ring (6 e), a rotary friction plate (6 f), a clamping ring (6 g), a fixed friction plate (6 h) and a fixed rubber ring (6 i), wherein the two ends of the mechanical seal assembly shell (6 a) are sequentially assembled and symmetrical, and the mechanical seal assembly (6) is assembled in a central through hole (7 c) of a first bearing seat (7) and sleeved with a rotor assembly (11).

3. The water pump motor for the high-speed alternating current-direct current permanent magnet synchronous well according to claim 1, is characterized in that: waterproof room oil pocket (8) by annular joint (8 a), annular groove (8 b), waterproof room oil pocket cavity (8 c), bellows (8 d), oil pocket bottom (8 e) constitute, annular joint (8 a), annular groove (8 b) and waterproof room oil pocket runner pilot hole (7 a) butt joint of first bearing frame (7), annular joint (8 a) are connected as an organic whole with bellows (8 d), bellows (8 d) are connected as an organic whole with oil pocket bottom (8 e) and constitute waterproof room oil pocket cavity (8 c).

4. The water pump motor for the high-speed alternating current-direct current permanent magnet synchronous well according to claim 1, is characterized in that: the waterproof chamber oil bag assembly structure is characterized in that a central through hole (7 c) for assembling a mechanical seal assembly (6) and a rotor assembly (11) in serial connection is formed in a first bearing seat (7), a waterproof chamber oil bag flow passage assembly hole (7 a) and a bolt hole (7 b) for assembling a waterproof chamber oil bag (8) are formed in the inner side of the axial edge of the first bearing seat (7), an oil bag pressing plate (9) is assembled after the waterproof chamber oil bag (8) is placed in the waterproof chamber oil bag flow passage assembly hole (7 a), then a bolt (10) is in threaded connection with the bolt hole (7 b), the waterproof chamber oil bag (8) is fixedly connected with the first bearing seat (7) through the oil bag pressing plate (9) and the bolt (10), four groups of the waterproof chamber oil bag flow passage assembly hole (7 a) and the bolt hole (7 b) for assembling the waterproof chamber oil bag (8) are formed in the first bearing seat (7), and four groups of the waterproof chamber oil bag pressing plate (9) and the bolt (10) correspond to the waterproof chamber oil bag flow passage assembly hole (7 a) and the bolt hole (7 b And (4) four groups.

5. The water pump motor for the high-speed alternating current-direct current permanent magnet synchronous well according to claim 1, is characterized in that: the differential pressure telescopic oil bag (16) is composed of an oil bag telescopic corrugated pipe (16 a) and an oil bag cover matching section (16 c), the bottom of the oil bag telescopic corrugated pipe (16 a) is closed, and the oil bag telescopic corrugated pipe (16 a) and the oil bag cover matching section (16 c) are connected to form an oil bag telescopic cavity (16 b).

6. The water pump motor for the high-speed alternating current-direct current permanent magnet synchronous well according to claim 1, is characterized in that: the oil bag cover (17) is bowl-shaped and is composed of a bowl-shaped edge annular joint (17 a), a bowl-shaped oil bag cover body (17 b), a bottom annular groove (17 c) and a bottom annular groove through hole (17 d), and the appearance of the oil bag cover (17) is matched with the inner wall of the oil bag cover matching section (16 c).

Technical Field

The invention belongs to the technical field of well water pump motors, and particularly relates to a high-speed alternating current-direct current permanent magnet synchronous well water pump motor.

Background

Disclosure of Invention

In order to overcome the defects of a water pump motor for a well in the prior art, the invention aims to provide the water pump motor for the high-speed alternating current-direct current permanent magnet synchronous well, wherein a mechanical sealing assembly, a waterproof chamber oil bag and a differential pressure telescopic oil bag are additionally arranged in a machine barrel of the traditional water pump motor for the well, the mechanical sealing assembly motor is adopted to run at a high speed in deep water, and outside water cannot enter the waterproof chamber; the waterproof chamber oil bag is used for absorbing pressure generated by white oil expansion caused by indoor temperature rise due to high-speed operation of a waterproof indoor mechanical sealing assembly; the differential pressure telescopic oil bag is used for balancing the differential pressure inside and outside the machine barrel, when the differential pressure inside and outside the machine barrel exceeds 0.5 kilogram, the differential pressure telescopic oil bag performs pressure regulating reaction, the differential pressure outside the machine barrel is always ensured not to exceed 0.5 kilogram, the expansion and the breakage of the machine barrel are prevented, namely white oil in the machine barrel is extruded by the extension of the differential pressure telescopic oil bag in the machine barrel, the internal pressure is increased and the external pressure is equal, the differential pressure inside the machine barrel of the water pump motor for the well is correspondingly changed along with the change of the water depth of the water pump motor for the well, therefore, the differential pressure telescopic oil bag in the machine barrel prevents the expansion and the breakage of the machine barrel by means of the contraction and release pressure, the loss is avoided, and the.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a high-speed alternating current-direct current is pump motor for permanent magnet synchronous well, includes barrel 1, and barrel 1 is a high-speed alternating current-direct current is pump motor shell for permanent magnet synchronous well, its characterized in that: one end of the machine barrel 1 is provided with a framework oil seal 3, a waterproof chamber cover 4 and a rubber pad 5, a mechanical seal assembly 6, a first bearing seat 7, a waterproof chamber oil bag 8, an oil bag pressing plate 9, a bolt 10, a stator assembly 2, a rotor assembly 11, a rotor shaft telescopic adjusting plate 12, a second bearing seat 13, an adjusting bolt 14, a driver 15, a differential pressure telescopic oil bag 16, an oil bag cover 17 and a clamp spring 18 are sequentially arranged in inner cavities of the end parts of the machine barrel of the framework oil seal 3, the waterproof chamber cover 4 and the rubber pad 5, the machine barrel 1 is composed of round pipes with unequal inner diameters, wherein the inner diameter of a first-stage round pipe 1a is D1, the inner diameter of a second-stage round pipe 1b is D2, the inner diameter of a third-stage round pipe 1c is D3, the inner diameter of a fourth-stage round pipe 1D is D5639, the inner diameter of a fifth-stage round pipe 1e is D5, D1 is an enlarged port, D2, D3, D493 2 and D5 is larger, assembling a driver 15 in an inner cavity of an inner diameter D3 of a third-stage round tube 1c of the machine barrel 1, assembling a differential pressure telescopic oil bag 16 and an oil bag cover 17 in an inner cavity of a D4 of a fourth-stage round tube 1D of the machine barrel 1, assembling a clamp spring 18 in an inner cavity of an inner diameter D5 of a fifth-stage round tube 1e of the machine barrel 1, clamping the differential pressure telescopic oil bag 16 and the oil bag cover 17 in an inner cavity of a D4 of the fourth-stage round tube 1D of the machine barrel 1 by the clamp spring 18, assembling a second bearing seat 13, a rotor shaft telescopic adjusting plate 12 and an adjusting bolt 14 at the tail end (a joint point of D2 and D3) of an inner cavity of a D2 of a second-stage round tube 1b, then assembling a stator assembly 2, assembling a first bearing seat 7, a waterproof chamber oil bag 8 and an oil bag pressing plate 9 at the front end of the rotor assembly 11, and then placing the tail end of the rotor assembly 11 after the assembly is assembled at the tail end on a second bearing, and then the mechanical seal assembly 6 is sleeved on the rotor assembly 11, the rubber pad 5 and the waterproof chamber cover 4 are sequentially assembled on the first bearing seat 7, and the framework oil seal 3 is assembled on the waterproof chamber cover 4 to form the high-speed alternating current/direct current permanent magnet synchronous well water pump motor.

The mechanical seal assembly 6 is composed of a mechanical seal assembly shell 6a, a locking screw 6b, a wave spring 6c, a baffle 6d, an O-shaped seal ring 6e, a rotary friction plate 6f, a clamping ring 6g, a fixed friction plate 6h and a fixed rubber ring 6i which are symmetrically assembled at two ends of the mechanical seal assembly shell 6a in sequence, and the mechanical seal assembly 6 is assembled in a central through hole 7c of the first bearing seat 7 and sleeved with the rotor assembly 11.

The waterproof chamber oil bag 8 is composed of an annular joint 8a, an annular groove 8b, a waterproof chamber oil bag cavity 8c, a telescopic corrugated pipe 8d and an oil bag bottom 8e, the annular joint 8a and the annular groove 8b are in butt joint with a waterproof chamber oil bag flow passage assembly hole 7a of the first bearing seat 7, the annular joint 8a and the telescopic corrugated pipe 8d are connected into a whole, and the telescopic corrugated pipe 8d and the oil bag bottom 8e are connected into a whole to form the waterproof chamber oil bag cavity 8c.

The first bearing seat 7 is provided with a central through hole 7c for assembling the mechanical seal assembly 6 and the rotor assembly 11 in serial connection, a waterproof chamber oil bag flow passage assembling hole 7a and a bolt hole 7b for assembling the waterproof chamber oil bag 8 are arranged on the inner side of the axial edge of the first bearing seat 7, the waterproof chamber oil bag 8 is arranged on the waterproof chamber oil bag flow passage assembling hole 7a and then is assembled with an oil bag pressing plate 9, and is in threaded connection with the bolt hole 7b through a bolt 10, the waterproof chamber oil bag 8 is fixedly connected on the first bearing seat 7 through the oil bag pressing plate 9 and the bolt 10, wherein the first bearing seat 7 is provided with four groups of waterproof chamber oil bag flow passage assembling holes 7a and bolt holes 7b for assembling the waterproof chamber oil bag 8, and the four groups of waterproof chamber oil bag 8, oil bag pressing plate 9 and adjusting bolts 14 correspond to the waterproof chamber oil bag flow passage assembling holes 7a and bolt holes 7b.

The differential pressure telescopic oil bag 16 is composed of an oil bag telescopic corrugated pipe 16a and an oil bag cover matching section 16c, the bottom of the oil bag telescopic corrugated pipe 16a is closed, and the oil bag telescopic corrugated pipe 16a and the oil bag cover matching section 16c are connected to form an oil bag telescopic cavity 16b.

The oil bag cover 17 is bowl-shaped and comprises a bowl-shaped edge annular joint 17a, a bowl-shaped oil bag cover body 17b, a bottom annular groove 17c and a bottom annular groove through hole 17d, and the appearance of the oil bag cover 17 is matched with the inner wall of the oil bag cover matching section 16c.

The working principle is as follows: the rotor assembly is an electromagnetic field which is formed by a magnetic steel sheet and an enameled wire and can convert a pole phase, the rotor is a multi-pole permanent magnet, the pole commutation of the rotor assembly is controlled by a driver, the driver can control the commutation, the current and the frequency of the pole of the stator assembly after the driver is electrified, the rotor assembly is driven to rotate at a high speed under the condition that the magnetic pole of the stator assembly is continuously changed by the magnetic field of the stator assembly, and then the output shaft of the rotor assembly is connected with a plurality of sections of pump shafts to rotate, so that.

The invention has the advantages that: because the conventional deep-well pump motor in the current market belongs to an asynchronous two-pole motor, the maximum rotating speed of the motor is not more than 3000 r/min; because the diameter of the deep well aperture is limited, the motor of the deep well pump below (model 125, namely 6 inches) can not be made into 11 KW; the invention adopts the mechanical seal assembly, the motor runs at high speed in deep water, and outside water can not enter the waterproof chamber; the waterproof chamber oil bag is used for absorbing pressure generated by white oil expansion caused by indoor temperature rise due to high-speed operation of a waterproof indoor mechanical sealing assembly; the differential pressure telescopic oil bag is used for balancing the differential pressure inside and outside the machine barrel, when the differential pressure inside and outside the machine barrel exceeds 0.5 kilogram, the differential pressure telescopic oil bag performs pressure regulating reaction, the differential pressure outside the machine barrel is always ensured not to exceed 0.5 kilogram, and the expansion and the breakage of the machine barrel are prevented; the application of the differential pressure telescopic oil bag thoroughly solves the problems that the water level in the well is increased when the well pump motor stops working in the well, the water pressure at the bottom of the well is increased, and the well pump motor is extruded, and the continuous working of the well pump motor in the water depth of 60-300 meters is ensured; the invention has small volume and light weight, the rotating speed can reach 4000 to 10000 revolutions per minute, (the model is 90, namely 4 inches), the motor of the deep well pump can be made into 15KW, and the number of the same-lift water pump impeller is only one third of that of the conventional deep well pump; for example, the rated lift is 200 m, the conventional deep well pump needs more than 30 sections of impellers for using an asynchronous motor, and the invention can meet the requirement only by 10 sections of impellers. The pump motor for the high-speed alternating current/direct current permanent magnet synchronous well has high rotating speed and is waterproof, and the water inlet problem in the motor is thoroughly and effectively solved by adopting the structure.

Drawings

FIG. 1 is a schematic diagram of the shape of a water pump motor for a high-speed alternating current-direct current permanent magnet synchronous well according to the invention;

FIG. 2 is a schematic diagram of a water pump motor for a high-speed alternating current-direct current permanent magnet synchronous well according to the invention;

FIG. 3 is an exploded view of the components of a high-speed AC/DC permanent magnet synchronous well water pump motor according to the present invention;

FIG. 4 is a schematic external view of a mechanical seal assembly of a water pump motor for a high-speed AC/DC permanent magnet synchronous well according to the present invention;

FIG. 5 is an exploded view of the mechanical seal assembly of the high speed AC/DC permanent magnet synchronous well water pump motor according to the present invention;

FIG. 6 is a schematic diagram of the connection of a first bearing seat of the water pump motor for the high-speed AC/DC permanent magnet synchronous well according to the present invention with a waterproof chamber oil bag, an oil bag pressing plate and bolts;

FIG. 7 is a schematic structural diagram of a waterproof chamber oil bag of a water pump motor for a high-speed alternating current-direct current permanent magnet synchronous well according to the invention;

FIG. 8 is a schematic perspective view of the construction of FIG. 7;

FIG. 9 is a schematic perspective view of a differential pressure telescopic oil bag of a water pump motor for a high-speed AC/DC permanent magnet synchronous well according to the present invention;

FIG. 10 is a schematic structural diagram of a differential pressure telescopic oil bag of a water pump motor for a high-speed alternating current-direct current permanent magnet synchronous well according to the invention;

FIG. 11 is a schematic diagram of a structure of a water pump motor for a high-speed AC/DC permanent magnet synchronous well according to the present invention;

FIG. 12 is a right side view of FIG. 11;

fig. 13 is a perspective view of fig. 11.

The reference numbers in the drawings: 1. a machine barrel, 1a, a first inner diameter section of circular tube, 1b, a second inner diameter section of circular tube, 2, a stator assembly, 3, a framework oil seal, 4, a waterproof chamber cover, 5, a rubber pad, 6, a mechanical seal component, 6a, a mechanical seal component shell, 6b, a locking screw, 6c, a wave spring, 6d, a baffle, 6e, an O-shaped seal ring, 6f, a rotary friction plate, 6g, a retainer ring, 6h, a fixed friction plate, 6i, a fixed rubber ring, 7, a first bearing seat, 7a, a waterproof chamber oil bag flow passage assembly hole, 7b, a bolt hole, 7c, a central through hole, 8, a waterproof chamber oil bag, 8a ring joint, 8b, a ring groove, 8c, a waterproof chamber oil bag cavity, 8d, a telescopic corrugated pipe, 8e, an oil bag bottom, 9, an oil bag pressing plate, 10, a bolt, 11, a rotor assembly, 12, a rotor shaft telescopic adjusting plate, 13, a second bearing seat, 14, an adjusting bolt, 15. the oil bag comprises a driver, 16a differential pressure telescopic oil bag, 16a oil bag telescopic corrugated pipe, 16b an oil bag telescopic cavity, 16c an oil bag cover matching section, 17 an oil bag cover, 17a bowl-shaped edge annular joint, 17b a bowl-shaped oil bag cover body, 17c a bottom annular groove, 17d a bottom annular groove through hole and 18 clamp springs.

Detailed Description

The invention further discloses a concrete implementation mode of the high-speed alternating current and direct current permanent magnet synchronous well water pump motor in combination with the attached drawings.

As shown in figures 1-3, the high-speed alternating current-direct current permanent magnet synchronous well water pump motor comprises a machine barrel 1, wherein the machine barrel 1 is a shell of the high-speed alternating current-direct current permanent magnet synchronous well water pump motor, a framework oil seal 3, a waterproof chamber cover 4 and a rubber pad 5 are arranged at one end of the machine barrel 1, a mechanical sealing component 6, a first bearing seat 7, a waterproof chamber oil sac 8, an oil sac pressing plate 9, a bolt 10, a stator assembly 2, a rotor assembly 11, a rotor shaft telescopic adjusting plate 12, a second bearing seat 13, an adjusting bolt 14, a driver 15, a differential pressure telescopic oil sac 16, an oil sac cover 17 and a snap spring 18 are sequentially arranged in inner cavities of the end parts of the machine barrel of the framework oil seal 3, the waterproof chamber cover 4 and the rubber pad 5, and the machine barrel 1 is composed of round pipes with unequal inner diameters, wherein the inner diameter of a first-stage round pipe 1a is D1, the inner diameter of a second-stage round pipe 1, The inner diameter of the fourth stage round tube 1D is D4, the inner diameter of the fifth stage round tube 1e is D5, D1 is an enlarged port, the inner diameters of D2, D3 and D4 are equal, the inner diameter of D5 is larger than that of D4 and is an assembly section of a snap spring 18, a driver 15 is assembled in the inner cavity of the inner diameter D3 of the third stage round tube 1c of the barrel 1, a differential pressure telescopic oil bag 16 and an oil bag cover 17 are assembled in the inner cavity of D4 of the fourth stage round tube 1D of the barrel 1, the snap spring 18 is assembled in the inner cavity of the inner diameter D5 of the fifth stage round tube 1e of the barrel 1, the differential pressure telescopic oil bag 16 and the oil bag cover 17 are clamped in the inner cavity of D4 of the fourth stage round tube 1D of the barrel 1 by the snap spring 18, a second bearing seat 13, a rotor shaft telescopic adjusting plate 12 and an adjusting bolt 14 are assembled at the tail end of the inner cavity of the D2 of the second stage round tube 1b (the joint point of D2 and D3), a, The water-proof chamber oil pocket 8 and the oil pocket pressing plate 9, then, the tail end of the rotor assembly 11 with the tail end and the front end assembled is placed on a second bearing seat 13 of a D2 inner cavity of the two-stage circular tube 1b of the machine barrel 1, then the mechanical sealing component 6 is sleeved on the rotor assembly 11, the rubber pad 5 and the waterproof chamber cover 4 are sequentially assembled on the first bearing seat 7, and the framework oil seal 3 is assembled on the waterproof chamber cover 4 to form the high-speed alternating current/direct current permanent magnet synchronous well water pump motor.

As shown in fig. 4-5, the mechanical seal assembly 6 is composed of a mechanical seal assembly housing 6a, a locking screw 6b, a wave spring 6c, a baffle 6d, an O-ring 6e, a rotary friction plate 6f, a collar 6g, a fixed friction plate 6h, and a fixed rubber ring 6i, which are symmetrically assembled at two ends of the mechanical seal assembly housing 6a in sequence, and the mechanical seal assembly 6 is assembled in a central through hole 7c of the first bearing seat 7 and sleeved with the rotor assembly 11.

As shown in fig. 6, the first bearing seat 7 is provided with a central through hole 7c for assembling the mechanical seal assembly 6 and the rotor assembly 11 in series connection, a waterproof chamber oil bag flow passage assembly hole 7a and a bolt hole 7b for assembling the waterproof chamber oil bag 8 are arranged on the inner side of the axial edge of the first bearing seat 7, the waterproof chamber oil bag 8 is arranged on the waterproof chamber oil bag flow passage assembly hole 7a and then is assembled with an oil bag pressing plate 9, and is screwed with the bolt hole 7b through a bolt 10, the waterproof chamber oil bag 8 is connected and fixed on the first bearing seat 7 through the oil bag pressing plate 9 and the bolt 10, wherein the first bearing seat 7 is provided with four groups of waterproof chamber oil bag flow passage assembly holes 7a and bolt holes 7b for assembling the waterproof chamber oil bag 8, and the four groups of waterproof chamber oil bag 8, the oil bag pressing plate 9 and the bolt 10 correspond to the waterproof chamber oil bag flow passage assembly holes 7a and the bolt holes 7b.

As shown in fig. 7-8, the waterproof chamber oil bag 8 is composed of an annular joint 8a, an annular groove 8b, a waterproof chamber oil bag cavity 8c, a telescopic corrugated pipe 8d and an oil bag bottom 8e, the annular joint 8a and the annular groove 8b are in butt joint with a waterproof chamber oil bag flow passage assembly hole 7a of the first bearing seat 7, the annular joint 8a and the telescopic corrugated pipe 8d are connected into a whole, and the telescopic corrugated pipe 8d and the oil bag bottom 8e are connected into a whole to form the waterproof chamber oil bag cavity 8c.

As shown in fig. 9-10, the differential pressure telescopic oil bag 16 is composed of an oil bag telescopic bellows 16a and an oil bag cover matching section 16c, the bottom of the oil bag telescopic bellows 16a is closed, and the oil bag telescopic bellows 16a and the oil bag cover matching section 16c are connected to form an oil bag telescopic cavity 16b.

As shown in figures 11-13, the oil bag cover 17 is bowl-shaped and is composed of a bowl-shaped edge annular joint 17a, a bowl-shaped oil bag cover body 17b, a bottom annular groove 17c and a bottom annular groove through hole 17d, and the shape of the oil bag cover 17 is matched with the inner wall of an oil bag cover matching section 16c.

The working principle is as follows: the stator assembly is an electromagnetic field which is formed by silicon steel sheets and enameled wires and can convert a pole phase, the rotor is a multi-pole permanent magnet, the pole commutation of the stator assembly is controlled by a driver, the driver can control the commutation, the current and the frequency of the pole of the stator assembly after the driver is electrified, the rotor assembly is driven to rotate at a high speed under the condition that the magnetic pole of the stator assembly is continuously changed by the magnetic field of the stator assembly, and then the output shaft of the rotor assembly is connected with a plurality of sections of pump shafts to rotate, so that the water.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.