CN212784993U

CN212784993U - Permanent magnet submersible motor

Info

Publication number: CN212784993U
Application number: CN202021538385.4U
Authority: CN
Inventors: 钟正平; 钟广财
Original assignee: Zhejiang Kesheng Machinery Electrical Co ltd
Current assignee: Zhejiang Kesheng Machinery Electrical Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-03-23
Anticipated expiration: 2030-07-29

Abstract

The utility model provides a permanent magnetism dive motor belongs to motor technical field. It includes motor housing, upper end cover, lower extreme cover, stator group, rotor group and rotor shaft, stator group sets up on motor housing's inner wall, is provided with the housing between stator group and the rotor group, and the upper end cover has the housing seat with the equal shaping of lower extreme cover, and the both ends and the housing seat of housing pass through welded fastening and are connected, form the shielding chamber between housing and motor housing's the inner wall, the rotor shaft runs through rotor group, the upper end extension cover of rotor shaft are equipped with first bearing group, and rotor shaft lower extreme extension overlaps in proper order along the axle wall of rotor shaft bottom and establishes second bearing group and first mechanical seal group. The utility model has the advantages of the leakproofness is strong, and multiple protection motor makes its life longer.

Description

Permanent magnet submersible motor

Technical Field

The utility model belongs to the technical field of the motor, refer in particular to a permanent magnetism dive motor.

Background

The submersible pump is used for extracting underground water from deep wells, and can also be used for water extraction projects such as rivers, reservoirs, water channels and the like. Wherein permanent magnetism dive motor is the important component part that is used for the immersible pump to work under water, and traditional motor often sets up sealing device in the upper end department of rotor shaft for the holistic leakproofness of protection motor, in case the sealed motor that goes wrong here intakes, the motor then can be scrapped, thereby influences the immersible pump and normally works.

Along with the development of modern science and technology, often adopt the housing to keep apart stator and rotor on the market at present, strengthen the leakproofness in the shield cavity at stator place, both ends all are provided with graphite bearing about the rotor shaft simultaneously, and adopt graphite thrust disc to be used for lower extreme graphite bearing's sealed, and the top position of rotor shaft sets up mechanical seal device, guarantee the leakproofness of the workspace at rotor place, but along with operating time's lapse, the mechanical seal device leakproofness on the top of rotor shaft weakens gradually, the workspace can gush into water, even the bottom utilizes graphite bearing also can slow corruption and damage. And as time goes on, water can slowly flow into the shielding cavity, and further serious damage is caused to the stator group.

Disclosure of Invention

The utility model aims at solving the existing problem and providing a strong permanent magnet submersible motor that ensures bottom bearing and stator group of leakproofness.

The purpose of the utility model is realized like this:

the utility model provides a permanent magnetism dive motor, includes motor housing, upper end cover, lower extreme, stator group, rotor group and rotor shaft, stator group sets up on motor housing's inner wall, is provided with the housing between stator group and the rotor group, and the upper end cover has the housing seat with the equal shaping of lower extreme, and the both ends and the housing seat of housing pass through welded fastening and are connected, form the shielding chamber between the inner wall of housing and motor housing, the rotor shaft runs through rotor group, rotor shaft's upper end extension cover are equipped with first bearing group, and rotor shaft lower extreme extension overlaps in proper order along the axle wall of rotor shaft bottom and establishes second bearing group and first mechanical seal group.

The utility model discloses further set up to, be located the shaping has the spacing ring in the shield cover seat of lower extreme cover, the up end joint of second bearing group is in the lower terminal surface of spacing ring, first mechanical seal group is including dynamic ring group and quiet ring seat, the outer wall of quiet ring seat offsets with the inner wall of spacing ring, and the up end of second bearing group offsets with the lower terminal surface of quiet ring seat, the lower terminal surface of dynamic ring group and the up end looks adaptation of quiet ring seat.

The utility model discloses further set up to, the rotating ring group is including overlapping in proper order and locating spring top cap, spring holder, the sealing ring of rotor shaft lower extreme, the lower terminal surface of sealing ring with the up end adaptation of quiet ring seat.

The utility model discloses further set up to, bolted connection is passed through on the top of upper end cover and is provided with sealing clamp plate, just sealing clamp plate is stretched out on the top of rotor shaft, the graphite bearing of rotor shaft upper end is located including the cover to first bearing group, and the graphite bearing overcoat is equipped with the bearing frame, the outer lane of bearing frame with the inner wall of upper end cover offsets, and sealing clamp plate sets up in the upper end of bearing frame.

The utility model discloses further set up to, be provided with the cover in the bearing frame and locate the epaxial second mechanical seal group of rotor, second mechanical seal group sets up in between seal clamp plate and the graphite bearing.

The utility model discloses further set up to, the lower extreme of second bearing group is equipped with the bearing and keeps off the lid, and the bearing keeps off the lid and is fixed in the lower extreme lid through the bolt.

The utility model discloses further set up to, the lower extreme that the bearing kept off the lid is provided with the rubber bag, and the lower extreme of rubber bag is provided with the base, and the base runs through its outer edge through the bolt and the outer edge of rubber bag is fixed in on the lower extreme cover, be provided with pressure regulating spring between rubber bag and the base.

The utility model discloses further set up to, the shielding intracavity is filled there is silica gel.

The utility model discloses further set up to, the upper end cover of rotor is equipped with the magnet steel baffle.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. the utility model discloses a through be provided with first mechanical seal group in rotor shaft bottom and play good sealed effect to bottom bearing, also can seal the protection to bottom bearing under the prerequisite that upper end cover and rotor shaft upper end junction intake at instant, make this permanent magnetism dive motor permanent normal use.

2. The utility model discloses utilize graphite bearing as the first bearing of upper end, it possesses advantages such as stronger acid resistance corrosion-resistant.

3. The utility model discloses further add second mechanical seal group in graphite bearing's upper end, protect graphite bearing to avoid it to be corroded to damage.

4. The utility model discloses a bottom at the bottom end cover is provided with rubber bag and base, is provided with the pressure regulating spring between the two, adjusts for the cavity internal pressure at second bearing place, and the guarantee second bearing normally works.

5. The utility model discloses pack silica gel in the shielding intracavity, reinforcing shielding intracavity leakproofness to the protection stator.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged schematic view of detail A of FIG. 1;

FIG. 3 is an enlarged schematic view of detail B of FIG. 1;

reference numerals:

1-a motor housing; 2-upper end cover; 20-a shielding sleeve seat; 21-sealing the pressure plate; 200-a spacing ring;

3-lower end cover; 30-a bearing clamp spring; 4-stator group; 40-a shielding sleeve;

5-a rotor set; 50-magnetic steel baffle; 51-a first bearing set; 510-a graphite bearing; 511-bearing seats;

512-a second mechanical seal group; 52-second bearing set; 520-bearing shield cover;

6-rotor shaft; 60-a shielded cavity;

7-a first mechanical seal group; 70-moving ring group; 701-a spring top cover; 702-a spring; 703-spring seats;

704-a seal ring; 71-a stationary ring group;

8-a rubber bag; 80-pressure regulating spring; 9-base.

Detailed Description

The invention will be further described in the following with reference to specific embodiments thereof, with reference to the accompanying drawings, in which fig. 1 to 3:

a permanent magnetic submersible motor comprises a motor shell 1, an upper end cover 2, a lower end cover 3, a stator group 4, a rotor group 5 and a rotor shaft 6, wherein the stator group 4 is arranged on the inner wall of the motor shell 1, a shielding sleeve 40 is arranged between the stator group 4 and the rotor group 5, a shielding sleeve seat 20 is formed on the upper end cover 2 and the lower end cover 3, two ends of the shielding sleeve 6 are fixedly connected with the shielding seat 20 through welding, a shielding cavity 60 is formed between the shielding sleeve 40 and the inner wall of the motor shell 1, the rotor shaft 6 penetrates through the rotor group 5, a first bearing group 51 is sleeved on an upper end extending part of the rotor shaft 6, a second bearing group 52 and a first mechanical sealing group 7 are sequentially sleeved on a lower end extending part of the rotor shaft 6 along the shaft wall at the bottom of the rotor shaft 6, the space where the rotor group 5 is located is isolated from the shielding cavity 60 through the first sealing group 7, and the motor is in the actual use process, through stator group circular telegram, drive rotor group and rotate, so rotor group itself need not the circular telegram, and it is not very high to waterproof demand, and required sealed water proof protection that avoids the short circuit damage to be located the stator group of shielding chamber 60 and bottom bearing, so utilize the first mechanical seal group of rotor shaft bottom will effectively protect the bottom bearing, avoid it to meet water impaired.

It is worth mentioning that once the motor is used for a long time, the sealing performance of the connecting part at the top of the rotor shaft is gradually deteriorated, and the bearing is still protected to be normally used under the condition that water enters the cavity where the rotor set is located, namely the first mechanical seal set.

The bearings of the second bearing set are preferably ball thrust bearings.

Preferably, a limiting ring 200 is formed in the shielding sleeve seat 20 of the lower end cover 3, the upper end surface of the second bearing group 52 is clamped on the lower end surface of the limiting ring 200, the first mechanical seal group 7 includes a moving ring group 70 and a stationary ring seat 71, the outer wall of the stationary ring seat 71 abuts against the inner wall of the limiting ring 200, the upper end surface of the second bearing group 52 abuts against the lower end surface of the stationary ring seat 71, and the lower end surface of the moving ring group 70 is matched with the upper end surface of the stationary ring seat 71.

Preferably, the moving ring assembly 70 includes a spring top cover 701, a spring 702, a spring seat 703 and a sealing ring 704, which are sequentially sleeved on the lower end of the rotor shaft 6, and the lower end surface of the sealing ring 704 is matched with the upper end surface of the stationary ring seat 71.

Preferably, the top end of the upper end cover 2 is provided with a sealing pressing plate 21 through a bolt connection, the top end of the rotor shaft 6 extends out of the sealing pressing plate 21, the first bearing group 51 comprises a graphite bearing 510 sleeved on the upper end of the rotor shaft 6, a bearing seat 511 is sleeved outside the graphite bearing 510, an outer ring of the bearing seat 511 abuts against the inner wall of the upper end cover 2, and the sealing pressing plate 21 is arranged on the upper end of the bearing seat 511.

Preferably, a second mechanical seal group 512 sleeved on the rotor shaft 6 is disposed in the bearing seat 511, and the second mechanical seal group 512 is disposed between the seal pressing plate 21 and the graphite bearing 510.

The graphite bearing 510 is arranged at the upper end of the top rotor shaft 6, the corrosion resistance is higher, the heat conduction performance is better, the added second mechanical sealing group 512 provides certain sealing protection for the graphite bearing 510, and the space where the rotor shaft 6 and the rotor group 5 are located has a good sealing effect

Preferably, the lower end of the second bearing set 52 is provided with a bearing blocking cover 520, and the bearing blocking cover 520 is fixed on the lower end surface of the lower end cover 3 through bolts, so as to provide better guarantee for the sealing of the bottom bearing.

Preferably, the lower extreme that bearing kept off lid 520 is provided with rubber bag 8, and the lower extreme of rubber bag 8 is provided with base 9, and base 9 is fixed in through its outer edge of bolt run through and the outer edge of rubber bag 8 on the lower end cover 3, be provided with pressure regulating spring 80 between rubber bag 8 and the base 9, it can be the space of second bearing place, and pressure can balanced regulation, ensures normal use.

Preferably, the shielding cavity 60 is filled with silica gel to enhance the sealing property in the shielding cavity, so as to protect the stator.

Preferably, the upper end of the rotor set 5 is provided with a magnetic steel baffle 50.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A permanent magnet submersible motor comprises a motor shell (1), an upper end cover (2), a lower end cover (3), a stator group (4), a rotor group (5) and a rotor shaft (6), wherein the stator group (4) is arranged on the inner wall of the motor shell (1), it is characterized in that a shielding sleeve (40) is arranged between the stator group (4) and the rotor group (5), a shielding sleeve seat (20) is formed on the upper end cover (2) and the lower end cover (3), two ends of the shielding sleeve (40) are fixedly connected with the shielding sleeve seat (20) by welding, a shielding cavity (60) is formed between the shielding sleeve (40) and the inner wall of the motor shell (1), the rotor shaft (6) penetrates through the rotor group (5), a first bearing group (51) is sleeved on the upper end extending part of the rotor shaft (6), and a second bearing group (52) and a first mechanical seal group (7) are sequentially sleeved on the lower end extending part of the rotor shaft (6) along the shaft wall at the bottom of the rotor shaft (6).

2. The permanent magnet submersible motor according to claim 1, wherein a limit ring (200) is formed in a shield sleeve seat (20) of the lower end cover (3), the upper end face of the second bearing group (52) is clamped to the lower end face of the limit ring (200), the first mechanical seal group (7) comprises a moving ring group (70) and a stationary ring seat (71), the outer wall of the stationary ring seat (71) abuts against the inner wall of the limit ring (200), the upper end face of the second bearing group (52) abuts against the lower end face of the stationary ring seat (71), and the lower end face of the moving ring group (70) is matched with the upper end face of the stationary ring seat (71).

3. The permanent magnet submersible motor according to claim 2, wherein the dynamic ring set (70) comprises a spring top cover (701), a spring (702), a spring seat (703) and a sealing ring (704) which are sequentially sleeved at the lower end of the rotor shaft (6), and the lower end face of the sealing ring (704) is matched with the upper end face of the static ring seat (71).

4. The permanent magnet submersible motor according to claim 1, wherein a sealing pressure plate (21) is arranged at the top end of the upper end cover (2) through bolt connection, the sealing pressure plate (21) extends out of the top end of the rotor shaft (6), the first bearing group (51) comprises a graphite bearing (510) sleeved at the upper end of the rotor shaft (6), a bearing seat (511) is sleeved outside the graphite bearing (510), the outer ring of the bearing seat (511) abuts against the inner wall of the upper end cover (2), and the sealing pressure plate (21) is arranged at the upper end of the bearing seat (511).

5. A permanent-magnet submersible motor according to claim 4, characterized in that a second mechanical seal group (512) is provided in the bearing housing (511) and is fitted on the rotor shaft (6), the second mechanical seal group (512) being provided between the seal pressure plate (21) and the graphite bearing (510).

6. A permanent magnet submersible motor according to claim 1, characterized in that the lower end of the second bearing set (52) is provided with a bearing stop cover (520), and the bearing stop cover (520) is fixed to the lower end face of the lower end cover (3) by bolts.

7. The permanent magnet submersible motor according to claim 6, wherein a rubber bag (8) is arranged at the lower end of the bearing blocking cover (520), a base (9) is arranged at the lower end of the rubber bag (8), the base (9) penetrates through the outer edge of the base and the outer edge of the rubber bag (8) through bolts to be fixed on the lower end cover (3), and a pressure regulating spring (80) is arranged between the rubber bag (8) and the base (9).

8. A permanent magnet submersible motor according to any of claims 1-7, characterized in that the shielding cavity (60) is filled with silica gel.

9. A permanent-magnet submersible motor according to any of claims 1-7, characterized in that the upper end cover of the rotor set (5) is provided with a magnetic steel baffle (50).