CN110206740B

CN110206740B - Full-dry submersible electric pump with segmented waterproof system

Info

Publication number: CN110206740B
Application number: CN201910533475.XA
Authority: CN
Inventors: 苗培华
Original assignee: Xuzhou Yatai Motor Co ltd
Current assignee: Xuzhou Yatai Motor Co ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-10-30
Anticipated expiration: 2039-06-19
Also published as: CN110206740A

Abstract

The invention belongs to the field of submerged electric pumps, in particular to a full-dry submerged electric pump with a segmented waterproof system, which aims at the problems of poor sealing effect and easy water leakage of the single sealing mode of the existing dry submerged pump. The invention is not easy to generate water leakage and oil leakage in the running process, can avoid burning out of the motor due to short circuit, prolongs the service life of the motor, and has better waterproof effect by carrying out water prevention in a plurality of sectional modes.

Description

Full-dry submersible electric pump with segmented waterproof system

Technical Field

The invention relates to the technical field of submersible electric pumps, in particular to a full-dry submersible electric pump with a segmented waterproof system.

Background

Is important equipment for conveying media, is a main tool for water supply and drainage, and is widely applied to the fields of liquid medium conveying of petrochemical industry and farmland irrigation. The pumps are of various types, and dry submersible pumps are often adopted for special water quality, such as high carbon-containing water quality and water quality with large sand content in a new well. Some dry-type immersible pumps at present operate unstably, and long-term operation makes motor shaft axial not hard up, and the noise increases, and sealing performance is also not ideal in addition, in case leak, burns out the water pump motor, not only makes equipment receive the loss, can influence the normal clear of industrial and agricultural production moreover.

The pump body impeller and the motor driving the impeller are both submerged in water to work, and the pump body impeller and the motor driving the impeller are used for a deep well and an operation surface. The submersible electric pump for the deep well supplies power to the motor through a cable extending into the well, so that a long transmission shaft is omitted, the submersible electric pump is compact in structure, light in weight and convenient to install, use and transfer, and tends to replace the long-shaft deep well pump in a power supply area, but is not suitable for a water well with high sand content and a power supply-free area. The electric motor for the submersible pump is of a dry type (the motor is totally sealed), a semi-dry type (the stator of the motor is sealed, and the rotor runs in water), an oil-filled type (the inside of the motor is filled with oil to prevent moisture from invading into a winding), a wet type (the inside of the motor is filled with water, and the stator and the rotor both run in water), and the like. The former 3 kinds need sealing and have higher requirements on manufacturing and installation precision, so the agricultural deep well submersible electric pump usually adopts a wet motor, the stator winding of the motor adopts a waterproof insulated wire or synthetic resin is poured at the end part and the groove of the stator winding, the influence of water entering the motor is not large, the sealing structure can be greatly simplified, and only sand prevention is required. Some deep well submersible electric pumps have the lift as high as 1400 meters and the maximum flow as high as 1.4 meters and 3/second.

However, the existing dry type submersible pump has the problems of single sealing mode, poor sealing effect, easy water leakage and poor waterproof performance.

Disclosure of Invention

The invention provides a full-dry submersible electric pump with a segmented waterproof system, which solves the problems of poor sealing effect and easy water leakage of the existing dry submersible pump in a single sealing mode.

In order to achieve the purpose, the invention adopts the following technical scheme:

a full-dry submersible electric pump with a segmented waterproof system comprises a machine body and a pump body connected to the lower end of the machine body, wherein a motor, an iron core and a motor shaft are arranged in the machine body, an impeller is arranged in the pump body, an upper end cover is fixedly arranged at the upper end of the machine body, a lower end cover is arranged at the bottom of the machine body, the lower end of the motor shaft penetrates through the lower end cover to extend into the pump body and be fixedly connected with the impeller, a first bearing groove is formed in the lower end face of the upper end cover, a thrust bearing is fixedly arranged in the first bearing groove, the upper end of the motor shaft is fixedly connected with the thrust bearing, an upper bearing is fixedly arranged at the upper end of the motor shaft, the upper bearing is fixedly arranged in the first bearing groove, a second bearing groove is formed in the upper end of the lower end cover, the motor shaft penetrates through the, the lower end of the lower end cover is provided with a sealing chamber, a movable sealing mechanism is arranged in the sealing chamber, the lower end of the lower end cover is fixedly connected with a sealing seat, and a drainage mechanism is arranged in the machine body.

Preferably, the movable sealing mechanism comprises an upper movable sealing ring and a lower movable sealing ring which are arranged in the sealing chamber, the upper movable sealing ring and the lower movable sealing ring are arranged in a downward symmetrical mode, the upper movable sealing ring and the lower movable sealing ring are both sleeved on the motor shaft, the side wall of the motor shaft, which is located in the sealing chamber, is sleeved with the spring, one end of the spring is fixedly connected to the upper movable sealing ring, and the other end of the spring is fixedly connected to the lower movable sealing ring.

Preferably, the drainage mechanism comprises a sealing partition plate fixedly connected in the machine body, the sealing partition plate is sleeved on the motor shaft, the lower end of the sealing partition plate is fixedly connected with an insertion cylinder, a capillary fiber rope penetrates through the sealing partition plate, one end of the capillary fiber rope extends to the contact surface of the sealing partition plate and the motor shaft, the other end of the capillary fiber rope extends into the insertion cylinder, an insertion sleeve matched with the insertion cylinder is fixedly connected onto a lower end cover, the lower end of the insertion cylinder is inserted into the insertion sleeve, a drainage groove is formed in the lower end of the lower end cover, the capillary fiber rope penetrates through the lower end cover, the upper end of the capillary fiber rope in the lower end cover extends into the insertion sleeve, the lower end of the capillary fiber rope in the lower end cover extends into the drainage groove, a liquid absorption pad is arranged in the drainage groove, an annular groove is formed in the inner wall of the lower end cover, and a sealing structure for sealing the drainage groove is arranged in the annular, and a control mechanism for controlling the motion of the closed structure is arranged on the side wall of the motor shaft below the lower end cover.

Preferably, the closed structure sets up the shift ring in the ring channel, be equipped with the permanent magnetism piece rather than the adaptation in the water drainage tank, the upper end fixedly connected with of permanent magnetism piece seals up the pad, the permanent magnetism piece passes through connecting rod fixed connection on the shift ring, the shift ring up end is the inclined plane structure, the lower extreme fixedly connected with of lower end cover and the protection frame that the permanent magnetism piece position corresponds.

Preferably, the control structure includes the carousel, the carousel middle part is inlayed and is equipped with fixed cover, fixed cover is fixed cup joints on the motor shaft, the symmetry is equipped with two mounting grooves on the lateral wall of carousel, sliding connection has the movable block in the mounting groove, fixedly connected with extension spring on the lateral wall of movable block, the one end fixed connection that the movable block was kept away from to the extension spring is on the inner wall of mounting groove, the spherical piece that supports of one end fixedly connected with of extension spring is kept away from to the movable block, the spherical piece that supports offsets the contact with the upper end inclined plane of shifting ring.

Preferably, an upper groove is formed in the upper end face of the sealing seat, a lower groove is formed in the lower end face of the sealing seat, an upper fixed sealing ring is arranged in the upper groove, and a lower fixed sealing ring is arranged in the lower groove.

Preferably, the lower extreme fixedly connected with of motor shaft smashes the axle, smash epaxial fixed mounting and have the crushing leaf.

The invention has the beneficial effects that:

through the arrangement of the movable sealing mechanism, the upper movable sealing ring and the lower movable sealing ring are pressurized and kept under pressure through the elasticity of the spring, so that the phenomena of water leakage and oil leakage are not easy to generate in the running process, the motor can be prevented from being burnt out due to short circuit, and the service life of the motor is prolonged.

Through arranging the drainage mechanism, the motor shaft can drive the turntable to rotate when rotating, the moving block is acted by centrifugal force and then moves outwards, and then the moving ring is pressed by the spherical pressing block, because the upper end surface of the moving ring is of an inclined surface structure, the moving block moves outwards along with the moving block, so that the moving ring is pressed and moves downwards, and then the permanent magnetic ring is driven by the connecting rod to move downwards, so that the drainage groove can be opened, at the moment, the motor shaft drives the impeller to rotate quickly, water in the inner cavity of the pump body flows at high speed, and a negative pressure area is formed at the drainage groove according to the physical principle that the flow speed is high and the pressure is low, the arranged sealing partition plate can separate trace water entering the machine body and absorb the trace water through the capillary action of the capillary fiber ropes, and the trace water absorbed through the capillary fiber ropes is transferred to the drainage groove, and when the motor shaft stops rotating, the permanent magnet blocks can be adsorbed at the drainage grooves again, and the drainage grooves are sealed through the sealing gaskets, so that one-level water prevention is realized.

Drawings

FIG. 1 is a schematic structural view of a full dry submersible electric pump with a segmental waterproofing system according to the present invention;

FIG. 2 is an enlarged view of FIG. 1 at B;

FIG. 3 is a schematic structural diagram of a control structure of a full dry submersible pump with a sectional waterproofing system according to the present invention;

fig. 4 is an enlarged view of a portion a in fig. 1.

In the figure: 1 machine body, 2 upper end cover, 3 thrust bearing, 4 first bearing groove, 5 upper bearing, 6 motor, 7 iron core, 8 motor shaft, 9 sealing clapboard, 10 second bearing groove, 11 lower bearing, 12 spring, 13 upper movable sealing ring, 14 lower movable sealing ring, 15 upper fixed sealing ring, 16 lower fixed sealing ring, 17 crushing blade, 18 crushing shaft, 19 impeller, 20 pump body, 21 sealing seat, 22 lower end cover, 23 protective frame, 24 connecting rod, 25 permanent magnetic block, 26 sealing gasket, 27 capillary fiber rope, 28 liquid absorption pad, 29 annular groove, 30 moving ring, 31 spherical abutting block, moving

block

32, 33 mounting groove, 34 turntable, 35 fixed sleeve, 36 tension spring, 37 plug bush and 38 plug bush.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-4, a full dry submersible electric pump with a segmented waterproof system comprises a machine body 1 and a pump body 20 connected to the lower end of the machine body 1, wherein a motor 6, an iron core 7 and a motor shaft 8 are arranged in the machine body 1, an impeller 19 is arranged in the pump body 20, an upper end cover 2 is fixedly arranged at the upper end of the machine body 1, a lower end cover 22 is arranged at the bottom of the machine body 1, the lower end of the motor shaft 8 passes through the lower end cover 22 to extend into the pump body 20 and be fixedly connected with the impeller 19, a first bearing groove 4 is arranged on the lower end surface of the upper end cover 2, a thrust bearing 3 is fixedly arranged in the first bearing groove 4, the upper end of the motor shaft 8 is fixedly connected with the thrust bearing 3, an upper bearing 5 is fixedly arranged at the upper end of the motor shaft 8, the upper bearing 5 is fixedly arranged in the first bearing groove 4, a second bearing, the lower bearing 11 is fixedly arranged in the second bearing groove 10, the lower end of the lower end cover 22 is provided with a sealing chamber, a movable sealing mechanism is arranged in the sealing chamber, the lower end of the lower end cover 22 is fixedly connected with a sealing seat 21, and a drainage mechanism is arranged in the machine body 1.

In the invention, the movable sealing mechanism comprises an upper movable sealing ring 13 and a lower movable sealing ring 14 which are arranged in a sealing chamber, the upper movable sealing ring 13 and the lower movable sealing ring 14 are arranged downwards symmetrically, the upper movable sealing ring 13 and the lower movable sealing ring 14 are both sleeved on a motor shaft 8, a spring 12 is sleeved on the side wall of the motor shaft 8 in the sealing chamber, one end of the spring 12 is fixedly connected on the upper movable sealing ring 13, and the other end of the spring 12 is fixedly connected on the lower movable sealing ring 14.

Specifically, the drainage mechanism includes a sealing partition plate 9 fixedly connected in the machine body 1, the sealing partition plate 9 is sleeved on the motor shaft 8, the lower end of the sealing partition plate 9 is fixedly connected with an insertion tube 38, a capillary fiber rope 27 penetrates through the sealing partition plate 9, one end of the capillary fiber rope 27 extends to the contact surface of the sealing partition plate 9 and the motor shaft 8, the other end of the capillary fiber rope 27 extends into the insertion tube 38, an insertion sleeve 37 matched with the insertion tube 38 is fixedly connected on the lower end cover 22, the lower end of the insertion tube 38 is inserted in the insertion sleeve 37, the lower end of the lower end cover 22 is provided with a drainage groove, the capillary fiber rope 27 penetrates through the lower end cover 22, the upper end of the capillary fiber rope 27 in the lower end cover 22 extends into the insertion sleeve 37, the lower end of the capillary fiber rope 27 in the lower end cover 22 extends into the drainage groove, a liquid absorption pad 28 is arranged in the drainage groove, an annular groove 29 is arranged on the, a closed structure for closing the drainage groove is arranged in the annular groove 29, and a control mechanism for controlling the action of the closed structure is arranged on the side wall of the motor shaft 8 below the lower end cover 22.

Specifically, the closed structure is arranged on a moving ring 30 in the annular groove 29, a permanent magnet 25 matched with the closed structure is arranged in the water drainage groove, a sealing gasket 26 is fixedly connected to the upper end of the permanent magnet 25, the permanent magnet 25 is fixedly connected to the moving ring 30 through a connecting rod 24, the upper end face of the moving ring 30 is of an inclined plane structure, and a protection frame 23 corresponding to the position of the permanent magnet 25 is fixedly connected to the lower end of the lower end cover 22.

Specifically, the control structure includes carousel 34, carousel 34 middle part inlays and is equipped with fixed cover 35, fixed cover 35 fixes the cup joint on motor shaft 8, the symmetry is equipped with two mounting grooves 33 on the lateral wall of carousel 34, sliding connection has movable block 32 in the mounting groove 33, fixedly connected with extension spring 36 on the lateral wall of movable block 32, the one end fixed connection that movable block 32 was kept away from to extension spring 36 is on the inner wall of mounting groove 33, movable block 32 keeps away from the spherical piece 31 that supports of one end fixedly connected with of extension spring 36, the spherical piece 31 that supports and the upper end inclined plane offset contact of shift ring 30.

Specifically, an upper groove is arranged on the upper end face of the sealing seat 21, a lower groove is arranged on the lower end face of the sealing seat 21, an upper fixed sealing ring 15 is arranged in the upper groove, and a lower fixed sealing ring 16 is arranged in the lower groove.

Specifically, the lower end of the motor shaft 8 is fixedly connected with a crushing shaft 18, and crushing blades 17 are fixedly mounted on the crushing shaft 18 to crush sundries and prevent blockage.

When the invention is used, the movable sealing mechanism is arranged, and the elastic force of the spring 12 is used for applying pressure to the upper movable sealing ring 13 and the lower movable sealing ring 14 and keeping the pressure, so that the phenomena of water leakage and oil leakage are not easy to generate in the running process, the burning out of the motor due to short circuit can be avoided, and the service life of the motor is prolonged.

By arranging the drainage mechanism, the motor shaft 8 can drive the turntable 34 to rotate when rotating, the moving block 32 is acted by centrifugal force and then moves outwards, and then the moving block 31 presses against the moving ring 30, because the upper end surface of the moving ring 30 is of an inclined surface structure, the moving block 32 moves outwards along with the outward movement of the moving block, and then the moving ring 30 presses downwards, and then the connecting rod 24 drives the permanent magnet ring 25 to move downwards, so that the drainage groove can be opened, at the moment, because the motor shaft 8 drives the impeller 19 to rotate quickly, water in the inner cavity of the pump body 20 flows at high speed, and according to the physical principle that the flow speed is high and the pressure is low, a negative pressure area is formed at the drainage groove, the arranged sealing partition plate 9 can separate trace water entering the machine body 1, and absorb the trace water through the capillary action of the capillary fiber rope 27, and transmit the trace water absorbed by the capillary fiber rope 27 to the drainage groove, the moving block 32 can be retracted to further not press against the moving ring 30, the permanent magnet blocks 25 can be adsorbed at the drainage groove again, and the drainage groove is sealed through the sealing gasket 26, so that water prevention of a certain level is realized.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. A full-dry submersible electric pump with a segmented waterproof system comprises a machine body (1) and a pump body (20) connected to the lower end of the machine body (1), and is characterized in that a motor (6), an iron core (7) and a motor shaft (8) are arranged in the machine body (1), an impeller (19) is arranged in the pump body (20), an upper end cover (2) is fixedly mounted at the upper end of the machine body (1), a lower end cover (22) is arranged at the bottom of the machine body (1), the lower end of the motor shaft (8) penetrates through the lower end cover (22) to extend into the pump body (20) and is fixedly connected with the impeller (19), a first bearing groove (4) is formed in the lower end face of the upper end cover (2), a thrust bearing (3) is fixedly mounted in the first bearing groove (4), the upper end of the motor shaft (8) is fixedly connected with the thrust bearing (3), an upper bearing (5) is fixedly, the upper bearing (5) is fixedly arranged in the first bearing groove (4), the upper end of the lower end cover (22) is provided with a second bearing groove (10), the motor shaft (8) penetrates through the second bearing groove (10), the motor shaft (8) is fixedly provided with a lower bearing (11), the lower bearing (11) is fixedly arranged in the second bearing groove (10), the lower end of the lower end cover (22) is provided with a sealing chamber, a movable sealing mechanism is arranged in the sealing chamber and comprises an upper movable sealing ring (13) and a lower movable sealing ring (14) which are arranged in the sealing chamber, the upper movable sealing ring (13) and the lower movable sealing ring (14) are symmetrically arranged downwards, the upper movable sealing ring (13) and the lower movable sealing ring (14) are both sleeved on the motor shaft (8), and a spring (12) is sleeved on the side wall of the motor shaft (8) positioned in the sealing chamber, one end of the spring (12) is fixedly connected to the upper movable sealing ring (13), the other end of the spring (12) is fixedly connected to the lower movable sealing ring (14), the lower end of the lower end cover (22) is fixedly connected to the sealing seat (21), an upper groove is formed in the upper end face of the sealing seat (21), a lower groove is formed in the lower end face of the sealing seat (21), an upper fixed sealing ring (15) is arranged in the upper groove, a lower fixed sealing ring (16) is arranged in the lower groove, a drainage mechanism is arranged in the machine body (1) and comprises a sealing partition plate (9) fixedly connected to the machine body (1), the sealing partition plate (9) is sleeved on the motor shaft (8), the lower end of the sealing partition plate (9) is fixedly connected to an inserting cylinder (38), a capillary fiber rope (27) penetrates through the sealing partition plate (9), and one end of the capillary fiber rope (27) extends to the contact surface of the sealing partition plate (9) and the motor shaft (8), the other end of the capillary fiber rope (27) extends to the interior of the inserting tube (38), the lower end cover (22) is fixedly connected with an inserting sleeve (37) matched with the inserting tube (38), the lower end of the inserting tube (38) is inserted into the inserting sleeve (37), a drainage groove is formed in the lower end of the lower end cover (22), the capillary fiber rope (27) penetrates through the lower end cover (22), the upper end of the capillary fiber rope (27) in the lower end cover (22) extends into the inserting sleeve (37), the lower end of the capillary fiber rope (27) in the lower end cover (22) extends to the drainage groove, a liquid suction pad (28) is arranged in the drainage groove, an annular groove (29) is formed in the inner wall, close to the lower end, of the lower end cover (22), a sealing structure used for sealing the drainage groove is arranged in the annular groove (29), and a moving ring (30) arranged in the annular groove (29) is arranged in the sealing structure, the water drainage tank is internally provided with permanent magnets (25) matched with the water drainage tank, the upper end of each permanent magnet (25) is fixedly connected with a sealing gasket (26), each permanent magnet (25) is fixedly connected onto a moving ring (30) through a connecting rod (24), the upper end face of each moving ring (30) is of an inclined plane structure, the lower end of a lower end cover (22) is fixedly connected with a protective frame (23) corresponding to the position of each permanent magnet (25), a motor shaft (8) is positioned on the side wall below the lower end cover (22) and is provided with a control mechanism for controlling the motion of a closed structure, the control structure comprises a rotating disc (34), the middle of the rotating disc (34) is embedded with a fixed sleeve (35), the fixed sleeve (35) is fixedly sleeved on the motor shaft (8), the side wall of the rotating disc (34) is symmetrically provided with two mounting grooves (33), and a, fixedly connected with extension spring (36) on the lateral wall of movable block (32), the one end fixed connection that the movable block (32) was kept away from in extension spring (36) is on the inner wall of mounting groove (33), the one end fixedly connected with sphere that extension spring (36) was kept away from in movable block (32) supports piece (31), the sphere supports piece (31) and the upper end inclined plane looks butt contact of shift ring (30), the lower extreme fixedly connected with crushing axle (18) of motor shaft (8), fixed mounting has crushing leaf (17) on crushing axle (18).