CN214543902U

CN214543902U - Long-life submersible pump

Info

Publication number: CN214543902U
Application number: CN202120528598.7U
Authority: CN
Inventors: 杜骅
Original assignee: Chuanben Water Pump Suzhou Co ltd
Current assignee: Chuanben Water Pump Suzhou Co ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-10-29
Anticipated expiration: 2031-03-12

Abstract

A long-life submersible pump comprises a pump body, a motor, a sealing cavity, a mechanical seal and a sealing shell, wherein the motor drives the pump body through a motor shaft, the sealing cavity acts on the motor shaft, the mechanical seal is sleeved on the motor shaft and located in the sealing cavity, the sealing shell is sleeved on the motor shaft and is respectively connected between the pump body shell and a motor shell in a sealing mode, an air cavity is formed between the sealing shell and the motor shell, the sealing cavity is formed between the sealing shell and the pump body shell, when the lower mechanical seal is abraded, water enters the sealing cavity to be mixed with lubricating oil to form mixed liquid, the mixed liquid can be slowly replaced with air in the mechanical seal chamber until the upper mechanical seal is immersed, the mixed liquid is degraded to be abraded, then the mixed liquid enters the air cavity, the mixed liquid is slowly replaced with the air in the air cavity, and the oil seal of the air cavity can be damaged until the mixed liquid is filled in the whole air cavity, until the oil blanket of air chamber wearing and tearing back, this mixed liquid can get into the motor, has prolonged water pump life greatly.

Description

Long-life submersible pump

Technical Field

The utility model relates to a long-life immersible pump.

Background

At present, in order to prevent the motor of the submersible pump from being flooded, a mechanical seal chamber (and only a mechanical seal chamber) is usually used for isolating a water source.

The mechanical seal chamber is provided with an upper group of mechanical seals and a lower group of mechanical seals, and is filled with lubricating oil, the lubricating oil does not fill the whole space, but a certain proportion of air is left. Lower mechanical sealing action: the water source is isolated, and water is prevented from entering the mechanical sealing chamber; upper mechanical sealing action: lubricating oil in the mechanical sealing chamber is prevented from entering the motor.

When the lower mechanical seal is worn, water enters the mechanical seal chamber little by little to be mixed with the original lubricating oil in the mechanical seal chamber to form a mixed solution, and the mixed solution is slowly replaced with the air in the mechanical seal chamber until the upper mechanical seal is immersed and degraded to cause wear. After the upper mechanical seal is abraded, the mixed liquid can enter the motor, so that the motor is burnt, and the service life of the submersible pump is short.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a long-life immersible pump.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a long-life immersible pump, includes the pump body, through the motor shaft drive the motor of pump body, act on the epaxial sealed chamber of motor, cover are located on the motor shaft and be located the mechanical seal of sealed intracavity, still locate including the cover the epaxial sealed housing of motor, sealed housing is sealing connection respectively between pump body casing and motor casing, sealed housing with form the air chamber between the motor casing, sealed housing with form between the pump body casing sealed chamber.

In some embodiments, the air chamber acts on the motor shaft, the air chamber being disposed above the sealed chamber.

In some embodiments, the opening of the shaft hole of the motor housing is provided with an oil seal for preventing water and oil from entering the motor, and the oil seal is provided on the motor shaft.

In some embodiments, the oil seal includes a ring main body fitted to an opening portion of the shaft hole of the motor housing, and a ring stopper portion extending obliquely from an upper edge portion of the ring main body toward a center of the ring and downward, the ring stopper portion abutting against a surface of the motor shaft.

In some embodiments, the seal housing includes an outer ring located on the outer ring, an inner ring sleeved on the motor shaft, a plurality of radial ribs connected between the outer ring and the inner ring, and a bulge located between every two adjacent radial ribs and bulging upward.

In some embodiments, the seal housing, the pump body housing, and the motor housing are fixedly connected by at least one bolt.

In certain embodiments, the seal housing is fixedly connected to the pump body housing by at least one screw.

In certain embodiments, the seal housing is fixedly coupled to the motor housing by at least one screw.

In some embodiments, the long-life submersible pump further comprises a sensor for detecting water and oil, the sensor being fixedly disposed within the air cavity.

The scope of the present invention is not limited to the technical solutions formed by specific combinations of the above technical features, and other technical solutions formed by arbitrary combinations of the above technical features or equivalent features should be covered. For example, the above features and the technical features (but not limited to) having similar functions disclosed in the present application are mutually replaced to form the technical solution.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model provides a immersible pump adopts air chamber and sealed chamber to prevent water oil to get into the motor, after the wearing and tearing of lower part mechanical seal, water gets into sealed chamber and lubricating oil mixture, form and mix liquid, after the wearing and tearing of upper part mechanical seal, this mixture can not get into the motor at once, but get into the air chamber, the air of mixed liquid and air intracavity slowly replaces, until mixed liquid is full of whole air chamber, just probably cause the damage to the oil blanket of air chamber, until after the oil blanket wearing and tearing of air chamber, this mixture just can get into the motor, thereby water pump life has been prolonged greatly.

Drawings

FIG. 1 is a schematic view of a partial structure of a submersible pump;

FIG. 2 is a schematic plan view of a sealed housing;

FIG. 3 is a schematic sectional view of the sealing case A-A;

wherein 1, motor shell; 2. a pump body housing; 3. a motor shaft; 4. sealing the cavity; 41. mechanical sealing; 5. sealing the housing; 51. an outer edge ring; 52. a radial rib; 53. an inner ring; 54. bulging; 6. an air chamber; 61. and (7) oil sealing.

Detailed Description

The long-life submersible pump shown in each figure comprises a pump body, a motor for driving the pump body through a motor shaft 3, a sealing cavity 4 acting on the motor shaft 3, a mechanical seal 41 sleeved on the motor shaft 3 and positioned in the sealing cavity 4, and a sealing shell 5 sleeved on the motor shaft 3.

As shown in fig. 1, the sealing housings 5 are respectively connected between the pump body housing 2 and the motor housing 1 in a sealing manner, an air chamber 6 is formed between the sealing housing 5 and the motor housing 1, a sealing cavity 4 is formed between the sealing housing 5 and the pump body housing 2, the submersible pump prevents water and oil from entering the motor by adopting the air chamber 6 and the sealing cavity 4, after the lower part of the mechanical seal 41 is worn, water can enter the sealing cavity 4 to mix with lubricating oil, mixed liquid is formed, after the upper part of the mechanical seal 41 is worn, the mixed liquid does not enter the motor immediately but enters the air chamber 6, the mixed liquid and air in the air chamber 6 are slowly replaced, until the mixed liquid fills the whole air chamber 6, damage to the oil seal of the air chamber 6 is not possible, and after the oil seal of the air chamber 6 is worn, the mixed liquid can not enter the motor, and the service life of the water pump is greatly prolonged.

Air chamber 6 internal fixation is provided with the sensor that is used for detecting water oil, and when mixed liquid got into air chamber 6, but the sensor detects alarm warning staff mechanical seal 41 almost all wearing and tearing behind the water oil, and the staff can in time change mechanical seal 41.

As shown in fig. 1, air chamber 6 acts on motor shaft 3, and air chamber 6 sets up in sealed chamber 4 top for air chamber 6 is as a spare space of sealed chamber 4, and mixture and greasy dirt etc. can not directly get into the motor but are detained in air chamber 6, make mixture and greasy dirt etc. difficult entering motor cause the motor to damage, have strengthened the life of motor.

The shaft hole opening of motor casing 1 is provided with the oil blanket 61 that is used for preventing water oil to get into the motor, on motor shaft 3 was located to oil blanket 61 cover, in this embodiment, oil blanket 61 was including inlaying the ring main part of locating the shaft hole opening of motor casing 1, by the ring fender portion that the slope of ring main part upper edge portion extended to the ring center and downward direction, ring fender portion offsets with 3 surfaces of motor shaft, the reinforcing wearability, and can take place deformation along with the rotation of motor shaft 3, be difficult for making motor shaft 3 take place wearing and tearing, further strengthen the durability of immersible pump.

As shown in fig. 2 and 3, the seal housing 5 includes an outer rim 51 located on the outer ring, an inner ring 53 sleeved on the motor shaft, a plurality of radial ribs 52 connected between the outer rim 51 and the inner ring 53, and a bulge 54 bulging upward between every two adjacent radial ribs 52, the formation of the bulge 54 enlarges the space of the seal cavity 4, so that more lubricant can be added into the cavity, longer lubrication and cooling time can be provided for the mechanical seal, and the service life of the submersible pump is longer.

As shown in fig. 1, the seal housing 5, the pump body housing 2 and the motor housing 1 are fixedly connected by at least one bolt, the seal housing 5 and the pump body housing 2 are fixedly connected by at least one screw, and the seal housing 5 and the motor housing 1 are fixedly connected by at least one screw, so that the stability of the seal housing 5 is enhanced.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a long-life immersible pump, includes the pump body, drives through motor shaft (3) the motor of pump body, act on sealed chamber (4) on motor shaft (3), cover are located on motor shaft (3) and be located mechanical seal (41) in sealed chamber (4), its characterized in that: still locate including the cover sealed casing (5) on motor shaft (3), sealed casing (5) sealing connection respectively between pump body casing (2) and motor casing (1), sealed casing (5) with form air chamber (6) between motor casing (1), sealed casing (5) with form between pump body casing (2) sealed chamber (4).

2. The long life submersible pump of claim 1, wherein: the air cavity (6) acts on the motor shaft (3), and the air cavity (6) is arranged above the sealing cavity (4).

3. The long life submersible pump of claim 2, wherein: the shaft hole opening part of motor casing (1) is provided with oil blanket (61) that are used for preventing water oil to get into the motor, oil blanket (61) cover is located on motor shaft (3).

4. The long life submersible pump of claim 3, wherein: the oil seal (61) comprises a ring main body embedded in an opening part of a shaft hole of the motor shell (1) and a ring blocking part which obliquely extends from the upper edge part of the ring main body to the center of the ring and downwards, and the ring blocking part is abutted against the surface of the motor shaft (3).

5. The long life submersible pump of claim 1, wherein: the sealing shell (5) comprises an outer edge ring (51) positioned on an outer ring, an inner ring (53) sleeved on the motor shaft (3), a plurality of radial ribs (52) connected between the outer edge ring (51) and the inner ring (53), and bulges (54) which are positioned between every two adjacent radial ribs (52) and bulge upwards.

6. The long life submersible pump of claim 1, wherein: the sealing shell (5), the pump body shell (2) and the motor shell (1) are fixedly connected through at least one bolt.

7. The long life submersible pump of claim 6, wherein: the sealing shell (5) is fixedly connected with the pump body shell (2) through at least one screw.

8. The long life submersible pump of claim 7, wherein: the sealing shell (5) is fixedly connected with the motor shell (1) through at least one screw.

9. The long life submersible pump of claim 1, wherein: the long-life submersible pump further comprises a sensor for detecting water and oil, and the sensor is fixedly arranged in the air cavity (6).