CN216241465U - Submersible pump and pump side sealing structure - Google Patents

Abstract

The utility model discloses a submersible pump and a pump side sealing structure, wherein the pump side sealing structure comprises a sealing sleeve and a sealing body, the sealing sleeve is fixed on a pump body, the sealing body is fixedly sleeved on a pump shaft of the pump body in a sealing manner, the sealing sleeve is sleeved outside the sealing body and is in clearance fit with the sealing sleeve, a spiral groove is formed in the outer surface of the sealing body, and liquid in the spiral groove is driven by the pump shaft to extrude towards the impeller side of the pump body. The pump side sealing structure is resistant to solid impurity abrasion and cannot be damaged due to the fact that the submersible pump idles for a long time and loses liquid lubrication.

Description

Submersible pump and pump side sealing structure

Technical Field

The utility model relates to a submersible pump structure, in particular to a submersible pump and a pump side sealing structure.

Background

Present immersible pump is because of motor side mechanical seal structure's oil blanket pressure-bearing and wear resistance are not high, for preventing that water pump work transport liquid from to its production relative high pressure, lie in usually on the pump shaft of immersible pump between motor side mechanical seal structure and the impeller add one pump side seal structure, but the pump side seal structure that uses among the prior art mostly is contact seals such as mechanical seal, and this kind is sealed to use a pair of accurate friction pair to realize sealed effect under liquid lubrication. And the conveying medium of the submersible pump often contains various solid impurities, such as silt particles, broken stone bricks and the like, which can seriously wear the sealing structure of the water pump. And the submersible pump is often unattended when in use, so that the submersible pump idles for a long time after pumping water, and the seal of the water pump is damaged due to friction, heat generation and ablation of a friction pair under the condition of no lubrication.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a submersible pump and a pump side sealing structure, wherein the pump side sealing structure is resistant to solid impurity abrasion and cannot be damaged due to the fact that the submersible pump loses liquid lubrication during idling for a long time.

Therefore, the submersible pump side sealing structure provided by the embodiment of the utility model comprises the sealing sleeve and the sealing body, wherein the sealing sleeve is fixed on the pump body, the sealing body is fixedly sleeved on the pump shaft of the pump body in a sealing manner, the sealing sleeve is sleeved outside the sealing body and is in clearance fit with the sealing sleeve, the outer surface of the sealing body is provided with the spiral groove, and liquid in the spiral groove is driven by the pump shaft to extrude towards the impeller side of the pump body.

Specifically, the sealing body is fixedly mounted on the pump shaft through a pin.

Specifically, a sealing groove is formed between the sealing body and the pump shaft, and a sealing ring is arranged in the sealing groove.

Specifically, the seal groove is arranged on the seal body.

Specifically, the sealing body is a stainless steel body or an aluminum alloy body.

Specifically, the clearance between the sealing sleeve and the sealing body is 0.3-0.5 mm.

The embodiment of the utility model also provides the submersible pump comprising the pump side sealing structure.

Compared with the prior art, at least one embodiment of the utility model has the following beneficial effects: when the submersible pump works, the pump shaft rotates to drive the sealing body to rotate, the spiral groove on the sealing body can drive liquid in a gap between the sealing body and the sealing sleeve to move towards the impeller side when rotating, and a unidirectional pressure gradient is generated to balance with the pressure of the liquid in the submersible pump, so that the interior of the sealing body is kept in a low-pressure state to realize a sealing effect; and because there is the clearance between seal and the seal cover, seal structure can not lose liquid lubrication and damage because of immersible pump idle running for a long time.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a pump side seal arrangement provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a submersible pump provided by an embodiment of the present invention;

wherein: 1. sealing sleeves; 2. a seal body; 3. a pump body; 4. a pump shaft; 5. an impeller; 6. a spiral groove; 7. a pin; 8. a seal ring; 9. an electric motor.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 and 2, a submersible pump side sealing structure comprises a sealing sleeve 1 and a sealing body 2, wherein the sealing sleeve 1 is fixed on a pump body 3, the sealing body 2 is fixedly sleeved on a pump shaft 4 of the pump body 3 in a sealing manner, the sealing sleeve 1 is sleeved outside the sealing body 2 and is in clearance fit with the sealing body 2, a spiral groove 6 is formed in the outer surface of the sealing body 2, and liquid in the spiral groove 6 is squeezed towards one side of the pump body 3, which is provided with an impeller 5, under the driving of the pump shaft 4.

The sealing principle of the pump side sealing structure is as follows: when the submersible pump works, the pump shaft 4 rotates to drive the sealing body 2 to rotate, the spiral groove 6 in the sealing body 2 can drive liquid in a gap between the sealing body 2 and the sealing sleeve 1 to move towards the impeller 5 side when rotating, unidirectional pressure gradient is generated, the pressure of the liquid in the submersible pump is balanced, and the sealing effect is achieved by keeping the low-pressure state inside the sealing body. Secondly, because there is the clearance between seal 2 and the seal cover 1, seal structure can not lose liquid lubrication and damage because of immersible pump idle running for a long time, and the solid impurity that the diameter is greater than the clearance in the immersible pump liquid also can't get into sealedly, and the less solid impurity of diameter also can not wear and tear sealedly.

The pump side sealing structure with the structure has the advantages of simple structure, solid impurity abrasion resistance, idling rotation resistance, and capability of greatly reducing the sealing maintenance frequency of the submersible pump, prolonging the fault-free continuous operation time of the submersible pump and reducing the structural weight of the water pump.

Referring to fig. 1, it can be understood that, in practical application, the sealing body 2 is fixedly installed on the pump shaft 4 through the pin 7, the inner wall of the sealing body 2 is provided with a sealing groove, a sealing ring 8 for sealing a gap between the sealing body 2 and the pump shaft 4 is arranged in the sealing groove, and the sealing body 2 is fixed by the pin 7, so that the sealing body 2 is convenient to disassemble and replace; wherein, sealing washer 8 can adopt O shape sealing washer, and in order to improve sealed effect, the seal groove can set up the multichannel moreover. The sealing body 2 can be made of stainless steel or aluminum alloy, and the gap between the sealing sleeve 1 and the sealing body 2 is controlled to be 0.3-0.5 mm.

Referring to fig. 2, in the submersible pump including the pump-side sealing structure provided in the embodiments of the present invention, the seal sleeve 1 divides the pump body 3 into an impeller cavity and a motor cavity, the impeller 5 is disposed in the impeller cavity, the motor 9 is disposed in the motor cavity, the motor 9 and the impeller 5 are connected by the pump shaft 4, and the motor 9 is sealed by the mechanical sealing structure on the motor side to isolate the fluid. Because above-mentioned this application embodiment immersible pump has adopted the pump side seal structure of above-mentioned structure, consequently possess the advantage effect of above-mentioned embodiment pump side seal structure at least, no longer describe herein.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

Meanwhile, if the utility model as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the utility model can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

Claims (7)

1. The utility model provides a immersible pump side seal structure which characterized in that: including seal cover (1) and seal body (2), seal cover (1) is fixed on the pump body (3), the sealed fixed cover of seal body (2) is on pump shaft (4) of the pump body (3), seal cover (1) cover is in outside seal body (2), and clearance fit between the two, be equipped with spiral groove (6) on the surface of seal body (2), liquid in spiral groove (6) is in pump shaft (4) drive down to the impeller side of the pump body (3) is crowded to move.

2. A submersible pump side seal structure according to claim 1, characterized in that: the sealing body (2) is fixedly arranged on the pump shaft (4) through a pin (7).

3. A submersible pump side seal structure according to claim 2, wherein: a sealing groove is arranged between the sealing body (2) and the pump shaft (4), and a sealing ring (8) is arranged in the sealing groove.

4. A submersible pump side seal structure according to claim 3, wherein: the sealing groove is arranged on the sealing body (2).

5. A submersible pump side seal structure according to claim 1, characterized in that: the sealing body (2) is a stainless steel body or an aluminum alloy body.

6. A submersible pump side seal structure according to any one of claims 1 to 5, characterized in that: the clearance between the sealing sleeve (1) and the sealing body (2) is 0.3-0.5 mm.

7. A submersible pump, characterized by: comprising a submersible pump side sealing structure according to any of claims 1 to 6.

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