阅读说明：本技术 具有循环自冷却流道的电机泵 (Motor pump with circulation self-cooling runner ) 是由 高殿荣 孙亚楠 张宗熠 赵建华 于 2021-01-18 设计创作，主要内容包括：本发明提供一种具有循环自冷却流道的电机泵,包括封盖、端盖、电机定子、电机转子、缸体套筒、缸体、活塞、斜盘、双作用配流盘和回程盘。缸体上设有沿圆周均匀分布的外侧缸孔和内侧缸孔,缸体的中心设有中心孔,活塞杆部和外侧缸孔的第一端面连接,活塞头部和滑靴第一端连接,滑靴第二端和斜盘连接,压紧弹簧的第一端和缸体的中心孔连接,压紧弹簧的第二端和压紧组件的第一端连接,压紧组件的第二端和回程盘连接。左端盖、电机定子、右端盖和右封盖中均设有冷却流道,左端盖冷却流道、电机定子冷却流道、右端盖冷却流道和右封盖冷却流道共同构成自冷却流道。本发明具有更高的吸液能力和自冷却效果,同时具有更弱的气蚀、噪声和振动现象。(The invention provides a motor pump with a circulating self-cooling flow channel, which comprises a sealing cover, an end cover, a motor stator, a motor rotor, a cylinder sleeve, a cylinder, a piston, a swash plate, a double-acting port plate and a return plate. The piston cylinder is provided with an outer cylinder hole and an inner cylinder hole which are uniformly distributed along the circumference, the center of the cylinder body is provided with a center hole, a piston rod part is connected with the first end face of the outer cylinder hole, a piston head part is connected with the first end of a sliding shoe, the second end of the sliding shoe is connected with a swash plate, the first end of a compression spring is connected with the center hole of the cylinder body, the second end of the compression spring is connected with the first end of a compression assembly, and the second end of the compression assembly is connected with a return plate. The left end cover, the motor stator, the right end cover and the right sealing cover are all provided with cooling runners, and the left end cover cooling runner, the motor stator cooling runner, the right end cover cooling runner and the right sealing cover cooling runner form a self-cooling runner together. The invention has higher liquid absorption capacity and self-cooling effect, and simultaneously has weaker cavitation, noise and vibration phenomena.)

1. A motor pump with a circulating self-cooling flow channel comprises a sealing cover, an end cover, a motor stator, a motor rotor, a bearing, an O-shaped sealing ring, a cylinder body sleeve, a cylinder body, a piston end cover, a swash plate, a double-acting port plate, a return plate, a sliding shoe, a compression spring and a compression assembly,

the cylinder body is provided with an outer cylinder hole and an inner cylinder hole which are uniformly distributed along the circumference, the center of the cylinder body is provided with a center hole, the outer cylinder hole is a through hole, the inner cylinder hole is a blind hole, the bottom of the inner cylinder hole is communicated with the outer cylinder hole through a cylinder hole, the rod part of the piston is positioned inside the outer cylinder hole and fixedly connected with the first end surface of the outer cylinder hole in the radial direction through the piston end cover, the head of the piston is connected with the first end of the slipper through a spherical hinge, the second end of the slipper is connected with the first end surface of the swash plate, the first end of the compression spring is connected with the central hole of the cylinder body, the second end of the compression spring is connected with the first end of the compression assembly, the second end of the compression assembly is connected with the center of the return disc, and the two ends of the return disc are respectively connected with the third end of the sliding shoe;

the outer surface of the motor rotor is located on the inner surface of the motor stator, the outer surface of the cylinder sleeve is located on the inner surface of the motor rotor, the cylinder, the return stroke disc and the swash plate are located on the inner surface of the cylinder sleeve, two ends of the cylinder sleeve are respectively connected with the fifth end surface of the left end cover and the fifth end surface of the right end cover through bearings, the double-acting valve plate is provided with an inner side valve port and an outer side valve port which are uniformly distributed along the circumference, the fastening bolt penetrates through the first end surface of the left seal cover to fixedly connect the left seal cover, the left end cover and the motor stator in sequence, and the fastening bolt penetrates through the first end surface of the right seal cover to fixedly connect the right seal cover, the right end cover and the motor stator in sequence;

the second end face of the left end cover is connected with the first end face of the left end cover through an O-shaped sealing ring, the second end face of the left end cover is connected with the first end face of the motor stator through an O-shaped sealing ring, the third end face of the left end cover is connected with the second end face of the motor stator through an O-shaped sealing ring, the fourth end face of the left end cover is connected with the first end face of the double-acting port plate, the second end face of the double-acting port plate is connected with the first end face of the cylinder body, the second end face of the swash plate is connected with the fourth end face of the right end cover, the third end face of the motor stator is connected with the first end face of the right end cover through an O-shaped sealing ring, the fourth end face of the motor stator is connected with the second end face of the right end cover through an O-shaped sealing ring, and the third;

the piston rod part is matched with an outer cylinder hole of the cylinder body to form a raw material water cavity, the piston head part is matched with an inner cylinder hole of the cylinder body to form an energy recovery cavity, the left sealing cover is respectively provided with a concentrated water high-pressure flow channel and a concentrated water low-pressure flow channel, and the left end cover is respectively provided with a raw material water low-pressure flow channel and a raw material water high-pressure flow channel; the raw material water cavity and the energy recovery cavity are respectively connected with the concentrated water high-pressure flow channel, the concentrated water low-pressure flow channel, the raw material water low-pressure flow channel and the raw material water high-pressure flow channel through the inner side flow distribution window and the outer side flow distribution window.

2. The motor pump having a circulating self-cooling flow passage according to claim 1, wherein axes of said cylinder block, said cylinder block sleeve, said motor rotor, said motor stator inner circumferential surface, said O-ring, said bearing, said return disc, said swash plate, and said double acting port plate are collinear.

3. The motor pump with the self-cooling circulation flow channel as claimed in claim 1, wherein the first end face of the left end cap is provided with a semi-circular groove, the semi-circular groove is located on the opposite side of the high pressure flow channel of the raw water, the axis of the semi-circular groove is aligned with the axis of the inner circular face of the left end cap, the outer side of the semi-circular groove is provided with waist-shaped through holes evenly distributed along the circumferential direction, and the semi-circular groove and the waist-shaped through holes together form the cooling flow channel of the left end cap.

4. The motor pump with the self-cooling circulation flow channel as claimed in claim 1, wherein the second end surface and the third end surface of the motor stator are provided with circular grooves, the circular grooves on the two sides are symmetrically distributed about the central plane of the motor stator, waist-shaped through holes are uniformly distributed along the circumferential direction between the circular grooves on the two sides, the axes of the circular grooves, the motor stator and the waist-shaped through hole distribution circle are located on the same straight line, and the circular grooves and the waist-shaped through holes together form the cooling flow channel of the motor stator.

5. The motor pump with the circulation self-cooling flow channel as claimed in claim 1, wherein the third end face of the right end cap is provided with a cylindrical groove, the outer side of the cylindrical groove is provided with waist-shaped through holes uniformly distributed along the circumferential direction, the axes of the cylindrical groove, the inner circle face of the left end cap and the distribution circle of the waist-shaped through holes are located on the same straight line, and the cylindrical groove and the waist-shaped through holes together form the right end cap cooling flow channel.

6. The motor pump with the circulating self cooling flow passage according to claim 1, wherein the right cap is provided at a center thereof with a cylindrical through hole, and the cylindrical through hole is the cooling flow passage of the right cap.

7. The motor pump with a circulating self-cooling flow passage as claimed in claims 1 to 6, wherein the left end cap, the motor stator, the right end cap and the right end cap each have a cooling flow passage therein, and the left end cap cooling flow passage, the motor stator cooling flow passage, the right end cap cooling flow passage and the right end cap cooling flow passage together constitute a self-cooling flow passage.

Technical Field

The invention relates to the technical field of motor pumps, in particular to a motor pump with a circulation self-cooling flow channel, and particularly relates to a motor pump with a high-efficiency circulation self-cooling flow channel.

Background

At present, all countries in the world face the condition of water resource shortage, and the water resource occupancy of everyone is continuously reduced. The reverse osmosis seawater desalination motor pump capable of realizing high integration of energy recovery can further improve the working efficiency of the system and reduce the energy consumption of the system while improving the integration level of the system and reducing the installation space of the system. Can realize the highly integrated reverse osmosis sea water desalination motor pump of energy recuperation, through arranging the imbibition runner on end cover and casing, take away the heat that self produced by inspiratory low-temperature liquid in the course of the work to realize the effect of self-cooling. But the partial self-cooling flow passage section of the reverse osmosis seawater desalination motor pump capable of realizing high integration of energy recovery has small aperture and longer flow passage, which seriously affects the liquid absorption capacity and the self-cooling capacity of the motor pump, and causes the problems of cavitation, noise, vibration and the like.

The invention structurally adds the sealing cover on the outer side of the end cover of the reverse osmosis seawater desalination motor pump capable of realizing high integration of energy recovery, redesigns the sealing covers on the left side and the right side, the end cover and the cooling flow channel in the motor stator, and develops the motor pump with higher liquid absorption capacity, self-cooling effect and weaker cavitation, noise and vibration phenomena.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a motor pump with a circulating self-cooling flow channel, and the liquid suction capacity and the self-cooling effect of the motor pump are improved by designing the cooling flow channel in a sealing cover, an end cover and a motor stator, so that the working efficiency of the whole system is improved, and the energy consumption of the whole system is reduced.

The invention provides a motor pump with a circulating self-cooling flow channel, which comprises a sealing cover, an end cover, a motor stator, a motor rotor, a bearing, an O-shaped sealing ring, a cylinder sleeve, a cylinder, a piston end cover, a swash plate, a double-acting valve plate, a return plate, a sliding shoe, a compression spring and a compression assembly. The cylinder body is provided with an outer cylinder hole and an inner cylinder hole which are uniformly distributed along the circumference, the center of the cylinder body is provided with a center hole, the outer cylinder hole is a through hole, the inner cylinder hole is a blind hole, the bottom of the inner cylinder hole is communicated with the outer cylinder hole through a cylinder hole, the rod part of the piston is positioned inside the outer cylinder hole and fixedly connected with the first end surface of the outer cylinder hole in the radial direction through the piston end cover, the head of the piston is connected with the first end of the slipper through a spherical hinge, the second end of the slipper is connected with the first end surface of the swash plate, the first end of the compression spring is connected with the central hole of the cylinder body, the second end of the compression spring is connected with the first end of the compression assembly, and the second end of the compression assembly is connected with the center of the return disc, and the two ends of the return disc are respectively connected with the third end of the sliding shoe. The utility model discloses a motor stator, including motor rotor, left end cover, right end cover, swash plate, return stroke dish, bearing, left end cover, right end cover, fastening bolt, right end cover, motor rotor's surface is located motor stator's internal surface, the cylinder body the return stroke dish with the swash plate is located cylinder body telescopic internal surface, the telescopic both ends of cylinder body respectively through the bearing with left end cover fifth terminal surface with right end cover fifth terminal surface is connected, be equipped with along circumference evenly distributed's inboard distribution window and outside distribution window on the two effect distribution dish, fastening bolt passes left side closing cap first terminal surface will left side closing cap the left end cover with motor stator is fixed connection in proper order, fastening bolt passes right side closing cap first. The left side closing cap second terminal surface pass through O type sealing washer with the first terminal surface of left end cover is connected, the left end cover second terminal surface pass through O type sealing washer with the first terminal surface of motor stator is connected, the left end cover third terminal surface pass through O type sealing washer with motor stator second terminal surface is connected, left end cover fourth terminal surface with the first terminal surface of two effect valve plates is connected, the second terminal surface of two effect valve plates with the first terminal surface of cylinder body is connected, the second terminal surface of sloping cam plate with the fourth terminal surface of right-hand member lid is connected, motor stator third terminal surface pass through O type sealing washer with the first terminal surface of right-hand member lid is connected, motor stator fourth terminal surface pass through O type sealing washer with the second terminal surface of right-hand member lid is connected, the third terminal surface of right-hand member lid pass through O type sealing washer with the second terminal surface of right-hand member lid is. The piston rod part is matched with an outer cylinder hole of the cylinder body to form a raw material water cavity, the piston head part is matched with an inner cylinder hole of the cylinder body to form an energy recovery cavity, the left sealing cover is respectively provided with a concentrated water high-pressure flow channel and a concentrated water low-pressure flow channel, and the left end cover is respectively provided with a raw material water low-pressure flow channel and a raw material water high-pressure flow channel; the raw material water cavity and the energy recovery cavity are respectively connected with the concentrated water high-pressure flow channel, the concentrated water low-pressure flow channel, the raw material water low-pressure flow channel and the raw material water high-pressure flow channel through the inner side flow distribution window and the outer side flow distribution window.

Preferably, the axes of the cylinder block, the cylinder block sleeve, the motor rotor, the motor stator inner circumferential surface, the O-ring, the bearing, the return plate, the swash plate, and the double-acting port plate are on the same straight line.

Preferably, a semi-circular ring groove is formed in the first end face of the left end cover, the semi-circular ring groove is located on the opposite side of the raw material water high-pressure flow passage, the axis of the semi-circular ring groove and the axis of the inner circular face of the left end cover are located on the same straight line, waist-shaped through holes evenly distributed along the circumferential direction are formed in the outer side of the semi-circular ring groove, and the semi-circular ring groove and the waist-shaped through holes jointly form the left end cover cooling flow passage.

Preferably, the second end face and the third end face of the motor stator are provided with circular ring grooves, the circular ring grooves on two sides are symmetrically distributed on the central plane of the motor stator, waist-shaped through holes are uniformly distributed along the circumferential direction between the circular ring grooves on two sides, the circular ring grooves are formed in the same straight line with the axis of the distribution circle of the waist-shaped through holes, and the circular ring grooves and the waist-shaped through holes jointly form the cooling flow channel of the motor stator.

Preferably, the third end face of the right end cover is provided with a cylindrical groove, the outer side of the cylindrical groove is provided with waist-shaped through holes which are uniformly distributed along the circumferential direction, the axes of the cylindrical groove, the inner circular face of the left end cover and the distribution circle of the waist-shaped through holes are positioned on the same straight line, and the cylindrical groove and the waist-shaped through holes jointly form the right end cover cooling flow passage.

Preferably, a cylindrical through hole is formed in the center of the right sealing cover, and the cylindrical through hole is a cooling flow passage of the right sealing cover.

Preferably, cooling channels are arranged in the left end cover, the motor stator, the right end cover and the right sealing cover, and the left end cover cooling channel, the motor stator cooling channel, the right end cover cooling channel and the right sealing cover cooling channel form a self-cooling channel together.

Compared with the prior art, the invention has the following advantages:

according to the invention, the sealing covers are added on the two sides of the left end cover and the right end cover of the motor pump capable of realizing high energy recovery integration, and the cooling flow channels in the left side sealing cover and the right side sealing cover, the end covers and the motor stator are redesigned.

Drawings

FIG. 1 is a two-dimensional block diagram, in overall cross-section, of an electric motor pump having a circulating self-cooling flowpath according to the present invention;

FIG. 2 is a block diagram of a dual acting port plate in an electric pump having a circulating self cooling flowpath according to the present invention;

FIG. 3 is a cross-sectional view of the left closure in the motor pump with the circulating self cooling flowpath of the present invention;

FIG. 4 is a schematic structural diagram of a left cover of the motor pump with a circulating self-cooling flow channel according to the present invention;

FIG. 5 is a schematic structural diagram of a left end cover of the motor pump with a circulating self-cooling flow channel according to the present invention;

FIG. 6 is a cross-sectional view of the left end cap of the motor pump with the self-cooling circulation flow path of the present invention;

FIG. 7 is a schematic view of a stator structure of a motor in the motor pump with a circulating self-cooling flow channel according to the present invention;

FIG. 8 is a cross-sectional view of the motor stator in the motor pump with the circulating self-cooling flow path of the present invention;

FIG. 9 is a schematic structural view of a right end cover of a motor pump with a circulating self-cooling flow channel according to the present invention;

FIG. 10 is a cross-sectional view of the right end cap of the motor pump with the self-cooling circulation flow path of the present invention;

FIG. 11 is a cross-sectional view of the right cover of the motor pump with the self-cooling circulation flow path of the present invention.

The main reference numbers:

a right cover 1, a right cover first end surface 1001, a right cover second end surface 1002, a right end cover 2, a right cover cooling flow passage 201, a right cover first end surface 2001, a right cover second end surface 2002, a right cover third end surface 2003, a right cover fourth end surface 2004, a right cover fifth end surface 2005, a motor stator 3, a motor stator cooling flow passage 301, a motor stator first end surface 3001, a motor stator second end surface 3002, a motor stator third end surface 3003, a motor stator fourth end surface 3004, a motor rotor 4, a cylinder block 5, an energy recovery chamber 501, a raw water chamber 502, a left end cover 6, a raw water high pressure flow passage 601, a raw water low pressure flow passage 602, a left cover first end surface 6001, a left cover second end surface 6002, a left cover third end surface 6003, a left cover fourth end surface 6004, a left cover fifth end surface 6005, a left cover 7, a concentrated water high pressure flow passage 701, a concentrated water low pressure flow passage 702, a left cover first end surface 7001, the device comprises a left cover second end face 7002, a bearing 8, a double-acting port plate 9, an inner port plate 9001, an outer port plate 9002, a piston 10, a piston end cover 11, a swash plate 12, an O-shaped sealing ring 13, a fastening bolt 14, a cylinder sleeve 15, a sliding shoe 16, a return plate 17, a compression spring 18 and a compression assembly 19.

Detailed Description

The technical contents, structural features, attained objects and effects of the present invention are explained in detail below with reference to the accompanying drawings.

The motor pump with the circulating self-cooling flow channel is shown in fig. 1 and comprises a sealing cover, an end cover, a motor stator 3, a motor rotor 4, a bearing 8, an O-shaped sealing ring 13, a cylinder sleeve 15, a cylinder 5, a piston 10, a piston end cover 11, a swash plate 12, a double-acting port plate 9, a return plate 17, a sliding shoe 16, a compression spring 18 and a compression assembly 19. According to the invention, the sealing covers are added on two sides of the motor pump end cover capable of realizing high energy recovery integration, and the cooling flow channels in the left sealing cover 7, the right sealing cover 1, the left end cover 6, the right end cover 2 and the motor stator 3 are designed, so that the motor pump has higher liquid absorption capacity and self-cooling effect, and has weaker cavitation, noise and vibration phenomena.

The cylinder body 5 is provided with an outer side cylinder hole and an inner side cylinder hole which are uniformly distributed along the circumference, the center of the cylinder body 5 is provided with a center hole, the outer side cylinder hole is a through hole, the inner side cylinder hole is a blind hole, and the bottom of the inner side cylinder hole is communicated with the outer side cylinder hole through a cylinder hole; the rod part of the piston 10 is positioned inside the outer cylinder hole, the rod part of the piston 10 is fixedly connected with the first end surface of the outer cylinder hole in the radial direction through a piston end cover 11, the head part of the piston 10 is connected with the first end of the sliding shoe 16 through a spherical hinge, the second end of the sliding shoe 16 is connected with the first end surface of the swash plate 12, the first end of the compression spring 18 is connected with the central hole of the cylinder body 5, the second end of the compression spring 18 is connected with the first end of the compression assembly 19, the second end of the compression assembly 19 is connected with the center of the return plate 17, and two ends of the return plate 17 are respectively connected with the third end of the sliding shoe 16. The cylinder block 5 and the swash plate 12 are connected by the piston 10 and the shoe 16.

The outer surface of the motor rotor 4 is located on the inner surface of the motor stator 3, a certain air gap is formed between the outer surface of the motor rotor 4 and the inner surface of the motor stator 3, the outer surface of the cylinder sleeve 15 is located on the inner surface of the motor rotor 4, the cylinder 5, the return plate 17 and the swash plate 12 are located on the inner surface of the cylinder sleeve 15, two ends of the cylinder sleeve 15 are respectively connected with the fifth end surface 6005 of the left end cover and the fifth end surface 2005 of the right end cover through bearings 8, as shown in fig. 2, the double-acting port plate 9 is provided with an inner port 9001 and an outer port 9002 which are uniformly distributed along the circumference, the fastening bolt 14 penetrates through the first end surface 7001 of the left end cover to fixedly connect the left end cover 7, the left end cover 6 and the motor stator 3 in sequence, and the fastening bolt 14 penetrates through the first end surface 1001 of the.

The left end cover second end face 7002 is connected with the left end cover first end face 6001 through an O-shaped sealing ring 13, the left end cover second end face 6002 is connected with the motor stator first end face 3001 through the O-shaped sealing ring 13, the left end cover third end face 6003 is connected with the motor stator second end face 3002 through the O-shaped sealing ring 13, the left end cover fourth end face 6004 is connected with the first end face of the double-acting port plate 9, the second end face of the double-acting port plate 9 is connected with the first end face of the cylinder body 5, the second end face of the swash plate 12 is connected with the right end cover fourth end face 2004, the motor stator third end face 3003 is connected with the right end cover first end face 2001 through the O-shaped sealing ring 13, the motor stator fourth end face 3004 is connected with the right end cover second end face 2002 through the O-shaped sealing ring 13, and the right end cover third end face 2003 is connected.

As shown in fig. 3 and 4, the left sealing cover 7 is provided with a concentrated water high-pressure flow passage 701 and a concentrated water low-pressure flow passage 702 respectively, and the left end cover 6 is provided with a raw material water low-pressure flow passage 602 and a raw material water high-pressure flow passage 601 respectively; the raw material water cavity 502 and the energy recovery cavity 501 are respectively connected with the concentrated water high-pressure flow passage 701, the concentrated water low-pressure flow passage 702, the raw material water low-pressure flow passage 602 and the raw material water high-pressure flow passage 601 through an inner side distribution window 9001 and an outer side distribution window 9002. The concentrated water high-pressure flow passage 701 and the raw material water high-pressure flow passage 601 are respectively distributed on the first side surfaces of the left sealing cover 7 and the left end cover 6, the concentrated water low-pressure flow passage 702 and the raw material water low-pressure flow passage 602 are distributed on the second side surfaces of the left sealing cover 7 and the left end cover 6, and the included angle between the end surface of the swash plate 12 and the axis of the cylinder body 5 is related to the discharge capacity of the raw material water cavity 501 and the energy recovery cavity 502.

The axes of the cylinder 5, the cylinder sleeve 15, the motor rotor 4, the inner circular surface of the motor stator 3, the O-shaped sealing ring 13, the bearing 8, the return disc 17, the swash plate 12 and the double-acting port plate 9 are on the same straight line.

As shown in fig. 5 and 6, a semicircular groove is formed in the first end surface 6001 of the left end cover, the semicircular groove is located on the opposite side of the raw material water high-pressure flow channel 601, the axis of the semicircular groove and the axis of the inner circular surface of the left end cover 6 are on the same straight line, kidney-shaped through holes uniformly distributed along the circumferential direction are formed in the outer side of the semicircular groove, and the semicircular groove and the kidney-shaped through holes jointly form a left end cover cooling flow channel.

As shown in fig. 7 and 8, the second end surface 3002 of the motor stator and the third end surface 3003 of the motor stator are provided with circular grooves, the circular grooves on both sides are symmetrically distributed about the central plane of the motor stator 3, kidney-shaped through holes are uniformly distributed along the circumferential direction between the circular grooves on both sides, the axes of the circular grooves, the motor stator and the kidney-shaped through holes are located on the same straight line, and the circular grooves and the kidney-shaped through holes jointly form a motor stator cooling flow channel 301.

As shown in fig. 9 and 10, a cylindrical groove is formed in the third end surface 2003 of the right end cap, waist-shaped through holes are uniformly distributed along the circumferential direction on the outer side of the cylindrical groove, the axes of the cylindrical groove, the inner circular surface of the right end cap 2 and the distribution circle of the waist-shaped through holes are located on the same straight line, and the cylindrical groove and the waist-shaped through holes jointly form a right end cap cooling flow passage 201.

As shown in fig. 11, the center of the right cover 1 is provided with a cylindrical through hole, which is a right cover cooling flow passage.

Cooling channels are arranged in the left end cover 6, the motor stator 3, the right end cover 2 and the right sealing cover 1, and the left end cover cooling channel, the motor stator cooling channel 301, the right end cover cooling channel 201 and the right sealing cover cooling channel form a self-cooling channel together.

An electric pump having a circulating self-cooling flow path according to the present invention is further described with reference to the following embodiments:

the invention is mainly used in islands, ships, offshore platforms, medium and small-sized seawater desalination and other occasions, the embodiment takes ship application as an example, and the platform of the embodiment requires that the installation space of the reverse osmosis seawater desalination system is smaller, the efficiency is higher, the efficiency is better, and the power consumption is lower, the better. The invention can effectively improve the liquid suction capacity and the self-cooling effect in structure, and simultaneously weakens the phenomena of cavitation, noise and vibration in the working process, thereby further improving the working efficiency of the system in the embodiment, reducing the energy consumption of the system in the embodiment and well meeting the application scene of seawater desalination of ships.

Because the first end surface 6001 of the left end cover is provided with a semi-annular groove, the outer side of the semi-annular groove is provided with waist-shaped through holes which are uniformly distributed along the circumferential direction; circular grooves are arranged on the second end surface 3002 of the motor stator and the third end surface 3003 of the motor stator, and kidney-shaped through holes are uniformly distributed along the circumferential direction between the circular grooves on the two sides; a cylindrical groove is formed in the third end face 2003 of the right end cover, waist-shaped through holes which are uniformly distributed along the circumferential direction are formed in the outer side of the cylindrical groove, and a cylindrical through hole is formed in the center of the right sealing cover 1.

The semi-circular ring groove, the kidney-shaped through hole, the circular ring groove, the cylindrical groove and the cylindrical through hole are main factors of the circulating self-cooling flow channel, and in order to play the maximum role, the axis of the semi-circular ring groove on the left end cover 6 and the axis of the kidney-shaped through hole distribution circle, the axis of the circular groove on the motor stator 3 and the axis of the kidney-shaped through hole distribution circle, the axis of the cylindrical groove on the right end cover 2 and the axis of the kidney-shaped through hole distribution circle and the axis of the cylindrical through hole on the right sealing cover 1 are required to be on the same straight line.

The outer diameter of the semi-circular ring groove on the left end cover 6 is equal to that of the waist-shaped through hole, the outer diameter of the circular groove on the motor stator 3 is equal to that of the waist-shaped through hole, and the outer diameter of the cylindrical groove on the right end cover 2 is equal to that of the waist-shaped through hole; the waist-shaped through hole on the left end cover 6, the waist-shaped through hole on the motor stator 3 and the waist-shaped through hole on the right end cover 2 have the same hole type size. Therefore, during installation, the waist-shaped through holes on the left end cover 6, the waist-shaped through holes on the motor stator 3 and the waist-shaped through holes on the right end cover 2 need to be aligned with each other.

After the motor pump is assembled and installed in a corresponding working system, the motor pump is started, and during the operation of the motor pump, the piston 10 reciprocates along the axis of the cylinder 5 along the outer cylinder hole of the cylinder 5 under the action of the driving motor, the cylinder 5, the sliding shoes 16, the return disc 17, the compression spring 18 and the compression assembly 19. When the piston 10 retracts into the outer cylinder hole of the cylinder 5, the volume of the energy recovery cavity 501 is increased, the volume of the raw material water cavity 502 is reduced, at the moment, high-pressure strong brine enters the concentrated water high-pressure flow passage 701, enters the energy recovery cavity 501 through the inner side flow distribution window 9001 arranged on the double-acting flow distribution plate 9, and drives the piston 10 to retract together with the motor, so that raw material seawater in the raw material water cavity 502 is pressurized, and the pressurized raw material seawater enters the raw material water high-pressure flow passage 601 through the outer side flow distribution window 9002 arranged on the double-acting flow distribution plate 9 and is discharged.

When the piston 10 extends out of the outer cylinder hole of the cylinder body 5, the volume of the energy recovery cavity 501 is reduced, the volume of the raw material water cavity 502 is increased, at the moment, low-pressure concentrated brine in the energy recovery cavity 501 enters the concentrated water low-pressure flow channel 702 through the inner side flow distribution window 9001 arranged on the double-acting flow distribution plate 9 and is discharged, meanwhile, raw material seawater sequentially passes through the right sealing cover cooling flow channel, the right end cover cooling flow channel 201, the motor stator cooling flow channel 301 and the left end cover cooling flow channel and enters the raw material water low-pressure flow channel 602, and enters the raw material water cavity 502 through the outer side flow distribution window 9002 arranged on the double-acting flow distribution plate 9, so that a cycle is completed, and the process is repeated.

In the circulating flow process of the fluid in the electrode pump, the heat generated by the motor stator 3 and the motor rotor 4 is taken away, and the self-cooling effect is realized.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.