CN213206087U - Mechanical seal pressure relief device of high-lift submersible electric pump - Google Patents

Abstract

The utility model relates to a submerged motor pump technical field, and disclose a high-lift submerged motor pump mechanical seal pressure relief device, which comprises a housin, main shaft and impeller, the inside of casing is fixed to be equipped with two baffles and divide into the impeller cavity from last to down in proper order through two baffles, sealed chamber and working chamber, the axle wall of main shaft passes through the bearing and rotates with the upper end of baffle to be connected and extend to the impeller cavity inside, the upper end of main shaft and the lower extreme fixed connection of impeller, the below of impeller is equipped with the seal cover, the top of seal cover is equipped with the movable cover, the upper end of seal cover seted up with movable cover assorted annular groove. The utility model discloses can reduce rivers stamping force and too big cause mechanical seal assembly's rotating ring and quiet wearing and tearing of ring, improve mechanical seal assembly's life, can maintain better sealed effect, can filter particle impurity simultaneously, prevent that particle impurity from influencing sealing performance.

Description

Mechanical seal pressure relief device of high-lift submersible electric pump

Technical Field

The utility model relates to a submerged motor pump technical field especially relates to a high-lift submerged motor pump mechanical seal pressure relief device.

Background

The submersible electric pump needs to be submerged in water, so that the requirement on the sealing performance of the connection part of a motor main shaft and a shell is high.

At present, submerged motor pump is in order to improve the leakproofness between main shaft and the casing, mechanical seal mechanism mechanical seal can generally be passed through, mechanical seal generally includes the rotating ring, quiet ring, the sealing washer, mechanism such as spring constitutes, it is all better to the sealed effect between the main shaft of general submerged motor pump and the casing, but some high-lift submerged motor pump when the operation under the high-lift, the rivers punching press that mechanical seal bore is great, the subassembly wearing and tearing that lead to mechanical seal mechanism are comparatively serious, lead to the leakproofness variation, and under the punching press effect, the rotating ring is not inseparable enough with quiet ring closure, all can lead to partial rivers to get into inside the motor like this, can cause the motor to damage seriously, consequently, a high-lift submerged motor pump mechanical seal pressure relief device is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art when some high-lift submerged motor pump operates under the high-lift, mechanical seal bears rivers punching force great, the subassembly wearing and tearing that lead to mechanical seal mechanism are comparatively serious, lead to the leakproofness variation, moreover under the punching force effect, the rotating ring is inseparable enough with quiet ring closure, can all lead to partial rivers to get into inside the motor like this, can cause the problem that the motor damaged seriously, and the high-lift submerged motor pump mechanical seal pressure relief device who provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a mechanical seal pressure relief device of a high-lift submersible electric pump comprises a shell, a main shaft and an impeller, wherein two clapboards are fixedly arranged inside the shell and are sequentially divided into an impeller cavity, a seal cavity and a working cavity from top to bottom through the two clapboards, the shaft wall of the main shaft is rotatably connected with the upper ends of the clapboards through bearings and extends into the impeller cavity, the upper end of the main shaft is fixedly connected with the lower end of the impeller, a seal sleeve is arranged below the impeller, a movable cover is arranged above the seal sleeve, the upper end of the seal sleeve is provided with an annular groove matched with the movable cover, the lower ends of the inner side wall and the outer side wall of the movable cover are fixedly connected with a plurality of uniformly distributed sliders, two vertical side walls of the annular groove are respectively provided with a plurality of chutes matched with the sliders, the upper inner side wall of the movable cover is fixedly connected with a plurality of uniformly distributed springs, and the lower ends of the plurality, the spindle is characterized in that rubber sleeves are fixedly sleeved at positions, located inside the sealing sleeve and inside the movable cover, of the spindle wall, an annular hole matched with the rubber sleeves is formed in the upper end of the movable cover, the hole wall of the annular hole is in sliding connection with the outer side wall of the rubber sleeve, and a mechanical sealing assembly is fixedly connected at the position, located inside the sealing cavity, of the spindle.

Preferably, the lower extreme fixedly connected with support ring of rubber sleeve, and the inside wall of support ring and the axial wall fixed connection of main shaft, the below of support ring is equipped with two end covers, and the upper end of two end covers is the annular setting, one of them the upper end of end cover and the lower extreme fixed connection of support ring, another the lower extreme of end cover and the lower lateral wall sliding connection of impeller cavity, two fixed annular filter screen that is equipped with between the end cover.

Preferably, the lower side wall of the impeller cavity is provided with a sealing groove matched with the sealing sleeve, the lower end of the sealing sleeve is fixedly connected with an internal thread sleeve, the lower end of the sealing groove is provided with an annular thread groove matched with the internal thread sleeve, and the inner side wall of the internal thread sleeve is in threaded connection with the side wall of the annular thread groove.

Preferably, a respirator is fixedly connected to the upper end of the right side wall of the sealed cavity.

Preferably, the inner side wall of the annular filter screen is fixedly connected with an annular filter element.

Preferably, the lower end of the end cover located at the lower side is fixedly connected with an annular sealing strip, and the lower end of the annular sealing strip is arranged in a manner of being abutted to the lower side wall of the impeller cavity.

Compared with the prior art, the utility model provides a high-lift submerged motor pump mechanical seal pressure relief device possesses following beneficial effect:

1. this high-lift submerged motor pump mechanical seal pressure relief device, through the casing that is equipped with, the main shaft, the impeller, mutually supporting of two baffles and mechanical seal subassembly, can reduce the possibility that rivers get into the working chamber inside, through the seal cover that is equipped with, the movable cover, mutually supporting of a plurality of sliders and a plurality of spring, when the main shaft drives the impeller and carries out high-lift operation, most water-cooled punching force can be offset through the bounce-back force of a plurality of springs, thereby can reduce the rivers punching force and excessively cause the wearing and tearing of the rotating ring and the quiet ring of mechanical seal subassembly, improve mechanical seal subassembly's life, make the rotating ring can closely laminate with the quiet ring, in order to maintain better sealed effect, through the rubber sleeve that is equipped with, can improve the leakproofness between movable cover and the main shaft, in order to further reduce the inside volume of rivers entering seal chamber.

2. This high-lift submerged motor pump mechanical seal pressure relief device, through mutually supporting of two end covers, support ring, ring filter and the annular filter core that are equipped with, can filter the particle impurity in the inside rivers of entering seal cover, avoid particle impurity to get into between the rotating ring and the quiet ring of mechanical seal subassembly, cause the rotating ring not inseparable enough with the laminating of quiet ring, influence sealing performance.

The device does not relate to the part and all is the same with prior art or can adopt prior art to realize, the utility model discloses can reduce rivers stamping force and too big cause mechanical seal assembly's rotating ring and quiet wearing and tearing of ring, improve mechanical seal assembly's life, can maintain better sealed effect, can filter particle impurity simultaneously, prevent that particle impurity from influencing sealing performance.

Drawings

Fig. 1 is a schematic structural view of a mechanical seal pressure relief device of a high-lift submersible electric pump according to the present invention;

fig. 2 is an enlarged view of a portion a of fig. 1.

In the figure: the device comprises a shell 1, a main shaft 2, an impeller 3, a partition plate 4, a sealing sleeve 5, a movable cover 6, a spring 7, a rubber sleeve 8, a mechanical sealing assembly 9, a support ring 10, an end cover 11, an annular filter screen 12, an internal thread sleeve 13, a respirator 14, an annular filter core 15 and an annular sealing strip 16.

Detailed Description

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

Referring to fig. 1-2, a mechanical seal pressure relief device for a high-lift submersible electric pump comprises a housing 1, a main shaft 2 and an impeller 3, wherein two clapboards 4 are fixedly arranged inside the housing 1 and are sequentially divided into an impeller cavity, a seal cavity and a working cavity from top to bottom through the two clapboards 4, the shaft wall of the main shaft 2 is rotatably connected with the upper ends of the clapboards 4 through bearings and extends into the impeller cavity, the upper end of the main shaft 2 is fixedly connected with the lower end of the impeller 3, a seal sleeve 5 is arranged below the impeller 3, a movable cover 6 is arranged above the seal sleeve 5, an annular groove matched with the movable cover 6 is arranged at the upper end of the seal sleeve 5, a plurality of uniformly distributed sliders are fixedly connected at the lower ends of the inner side wall and the outer side wall of the movable cover 6, a plurality of chutes matched with the sliders are arranged on the two vertical side walls of the annular groove, a plurality, and the lower extreme of a plurality of springs 7 all with the lower lateral wall fixed connection of impeller cavity, the fixed rubber sleeve 8 that has cup jointed in the position that the shaft wall of main shaft 2 is located seal cover 5 inside and movable cover 6 inside, and the upper end of movable cover 6 is seted up with the annular opening of rubber sleeve 8 assorted, the pore wall of annular opening and the lateral wall sliding connection of rubber sleeve 8, main shaft 2 is located the position fixed connection of seal intracavity portion and is connected with mechanical seal subassembly 9, mechanical seal subassembly 9 passes through the rotating ring, the quiet ring, mutually supporting of subassembly such as spring and sealing washer, can carry out better sealing between main shaft and the baffle 4, this is prior art, do not do too much to describe repeatedly.

Lower extreme fixedly connected with support ring 10 of rubber sleeve 8, and the inside wall of support ring 10 and the axial wall fixed connection of main shaft 2, the below of support ring 10 is equipped with two end covers 11, and the upper end of two end covers 11 is the annular setting, the upper end of one of them end cover 11 and the lower extreme fixed connection of support ring 10, the lower extreme of another end cover 11 and the lower lateral wall sliding connection of impeller cavity, fixed annular filter 12 that is equipped with between two end covers 11, filter the granule impurity in the rivers that get into seal cover 5 inside, avoid between granule impurity gets into the rotating ring and the quiet ring of mechanical seal subassembly 9, cause the rotating ring not inseparable enough with the laminating of quiet ring, influence sealing performance.

The lower side wall of impeller cavity offer with seal cover 5 assorted seal groove, seal cover 5's lower extreme fixedly connected with internal thread cover 13, the lower extreme of seal groove offer with internal thread cover 13 assorted annular thread groove, and the inside wall of internal thread cover 13 and the lateral wall threaded connection of annular thread groove, can be convenient for people to carry out the dismouting to seal cover 5, can clear up annular filter 12 filterable impurity after taking apart.

The upper end of the right side wall of the sealed cavity is fixedly connected with a respirator 14, and the respirator 14 can reduce the pressure caused by the diving depth, which is the prior art and is not described in detail.

The inside wall fixedly connected with annular filter core 15 of annular filter screen 12 can improve annular filter screen 12's filter effect.

The lower extreme fixedly connected with annular sealing strip 16 that is located lower side end cover 11, and the lower extreme of annular sealing strip 16 and the lower wall of impeller cavity set up of propping up, can improve the leakproofness that is located between lower side end cover 11 and the impeller cavity, avoid granule impurity to flow into inside the seal chamber from the below of end cover 11.

The utility model discloses in, during the use, when the submerged motor pump begins high-lift during operation, main shaft 2 rotates and drives impeller 3 and rotates, can inhale water and blowout, inhale rivers impact movable cover 6 that comes in, can make movable cover 6 downstream and extrude a plurality of springs 7, under the bounce-back effect of a plurality of springs 7, can offset the punching press power of rivers, thereby can reduce the influence of the punching press power of rivers to the mechanical seal subassembly 9 of seal chamber inside, improve the life of mechanical seal subassembly 9, make the rotating ring and the quiet ring of mechanical seal subassembly 9 can closely laminate, with the better sealed effect of maintenance, rubber sleeve 8 can improve the leakproofness between movable cover 6 and the main shaft 2, reduce the volume that rivers got into seal chamber inside, indirectly improve the sealed effect of mechanical seal subassembly 9.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. A mechanical seal pressure relief device of a high-lift submersible electric pump comprises a shell (1), a main shaft (2) and an impeller (3), and is characterized in that two partition plates (4) are fixedly arranged inside the shell (1) and are sequentially divided into an impeller cavity, a seal cavity and a working cavity from top to bottom through the two partition plates (4), the shaft wall of the main shaft (2) is rotatably connected with the upper ends of the partition plates (4) through bearings and extends into the impeller cavity, the upper end of the main shaft (2) is fixedly connected with the lower end of the impeller (3), a seal sleeve (5) is arranged below the impeller (3), a movable cover (6) is arranged above the seal sleeve (5), an annular groove matched with the movable cover (6) is formed in the upper end of the seal sleeve (5), a plurality of sliders which are uniformly distributed are fixedly connected with the lower ends of the inner side wall and the outer side wall of the movable cover (6), and a plurality of and slider assorted spouts have all been seted up to two vertical portion lateral walls of annular groove, the last inside wall fixedly connected with of movable cover (6) a plurality of evenly distributed's spring (7), and the lower extreme of a plurality of springs (7) all with the lower lateral wall fixed connection of impeller cavity, the fixed cover in position that the axial wall of main shaft (2) is located seal cover (5) inside and movable cover (6) inside has connect rubber sleeve (8), and the upper end of movable cover (6) seted up with rubber sleeve (8) assorted annular ring, the pore wall of annular ring and the lateral wall sliding connection of rubber sleeve (8), main shaft (2) are located the position fixedly connected with mechanical seal subassembly (9) of seal intracavity portion.

2. The mechanical seal pressure relief device for the high-lift submersible electric pump according to claim 1, characterized in that the lower end of the rubber sleeve (8) is fixedly connected with a support ring (10), the inner side wall of the support ring (10) is fixedly connected with the shaft wall of the main shaft (2), two end covers (11) are arranged below the support ring (10), the upper ends of the two end covers (11) are arranged in an annular shape, one of the end covers (11) is fixedly connected with the lower end of the support ring (10), the other end cover (11) is slidably connected with the lower side wall of the impeller cavity, and an annular filter screen (12) is fixedly arranged between the two end covers (11).

3. The mechanical seal pressure relief device for the high-lift submersible electric pump according to claim 1, wherein a sealing groove matched with the sealing sleeve (5) is formed in the lower side wall of the impeller cavity, an internal thread sleeve (13) is fixedly connected to the lower end of the sealing sleeve (5), an annular thread groove matched with the internal thread sleeve (13) is formed in the lower end of the sealing groove, and the inner side wall of the internal thread sleeve (13) is in threaded connection with the side wall of the annular thread groove.

4. A mechanical seal pressure relief device for a high-lift submersible electric pump according to claim 1, characterized in that a breather (14) is fixedly connected to the upper end of the right side wall of the seal chamber.

5. The mechanical seal pressure relief device for high-lift submersible electric pump according to claim 2, characterized in that the inner side wall of the annular filter screen (12) is fixedly connected with an annular filter element (15).

6. The mechanical seal pressure relief device for the high-lift submersible electric pump according to claim 2, characterized in that an annular sealing strip (16) is fixedly connected to the lower end of the end cover (11) at the lower side, and the lower end of the annular sealing strip (16) is arranged to be opposite to the lower side wall of the impeller cavity.

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