CN213063982U

CN213063982U - Stable form submersible sewage pump machine seals automatically cleaning structure

Info

Publication number: CN213063982U
Application number: CN202021142188.0U
Authority: CN
Inventors: 叶代宏; 蒋新杰; 王强
Original assignee: Hangzhou Xizi Pumps Co ltd
Current assignee: Hangzhou Xizi Pumps Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-04-27
Anticipated expiration: 2030-06-18

Abstract

The utility model relates to a dredge pump especially relates to a stable form submersible sewage pump machine seals automatically cleaning structure. The utility model provides a stable form submersible sewage pump machine seals automatically cleaning structure, which comprises a pump body and a motor, be connected with the impeller on the main shaft of motor, it is provided with the oil chamber cap to correspond main shaft and impeller on the pump body, form sealed chamber between oil chamber cap and the impeller, it is provided with the mechanical seal quiet ring to correspond oil chamber cap department on the main shaft, one side that is close to the impeller on the main shaft is provided with the mechanical seal rotating ring, it is provided with double spiral groove to correspond mechanical seal quiet ring and mechanical seal rotating ring on the lateral wall in sealed chamber, be provided with multi-functional sealing washer between mechanical seal quiet ring and the oil chamber cap, one side that is located sealed chamber of multi-functional sealing washer. The utility model discloses a machine seals department and can not have a large amount of granule aggregations, can reach the machine and seal automatically cleaning effect to extension machine seals life, the condition that the pump leaked can not appear.

Description

Stable form submersible sewage pump machine seals automatically cleaning structure

Technical Field

The utility model relates to a dredge pump especially relates to a stable form submersible sewage pump machine seals automatically cleaning structure.

Background

The submersible sewage pump is widely applied to the sewage discharge of electric power and chemical engineering port ship loading and unloading systems and agricultural irrigation. The media transport is typically performed by a drive device driving the dredge pump through a coupling and a long shaft. The safety and the operation of the submersible sewage pump are directly related to whether the whole application system can normally operate, so that the submersible sewage pump has higher requirements on the reliability, the usability, the installation, the operation and the maintenance of the submersible sewage pump equipment.

As shown in fig. 4, the mechanical seal of the oil chamber cover 4 of the existing submersible sewage pump is usually designed by a planar structure 17, when the pump operates in a severe sewage environment, a large amount of impurities and small fine sand particles are accumulated at the mechanical seal for a long time, which can cause severe abrasion of the contact surface of the mechanical seal dynamic and static rings, shorten the service life of the mechanical seal and cause water leakage of the pump.

For example, Chinese patent publication numbers are: CN205013323U, a small-size submersible sewage pump of announcing in 2016 month 2 and 3, including bearing, axle, stator, motor casing, pencil assembly, mechanical seal gland, the pump body, impeller, motor cover and handle, the one end of the pump body is connected to the bottom of motor casing, sets up the impeller in the pump body, the one end of impeller connecting axle, the motor cover is connected through the bearing to the other end of axle, and the epaxial installation mechanical seal of impeller one side, mechanical seal gland compress tightly mechanical seal in the junction of axle and pump body. The motor casing, the motor cover and the lifting handle are integrally cast, so that the production and processing cost is reduced, the wire inlet holes are formed in the side face of the bottom of the motor casing and are used for allowing a wire harness assembly to enter, the number of sealing surfaces is reduced from original 4 to 1, the potential water leakage risk is greatly reduced, and the overall safety performance is improved; meanwhile, the whole structure of the electric pump is more compact, the center of gravity is reduced, and the operation is more stable and reliable, but the mechanical seal part of the oil chamber cover usually adopts a plane type structural design, when the pump operates in a severe sewage environment, a large amount of impurities and small fine sand particles are gathered at the mechanical seal part for a long time, so that the contact surface of a dynamic ring and a static ring of the mechanical seal is seriously abraded, the service life of the mechanical seal is shortened, and the water leakage of the pump is caused.

Disclosure of Invention

The utility model discloses mainly be to the grease chamber lid machine seal department on the current submersible sewage pump adopts plane structural design usually, when the pump moves in more abominable sewage environment, a large amount of impurity and little fine sand granule long-term gathering are in machine seal department, time is a specified duration, can lead to machine seal sound ring contact surface wearing and tearing serious, shorten machine seal life, cause the problem that the pump leaked, a machine seal department can not have a large amount of granule gathering, can reach machine seal automatically cleaning effect, thereby prolong machine seal life, the stable form submersible sewage pump machine seal automatically cleaning structure of the condition that the pump leaked can not appear.

The purpose of the utility model is mainly realized by the following scheme: a stable form submersible sewage pump machine seals automatically cleaning structure, includes the pump body and motor, the main shaft of motor on be connected with the impeller, the pump body on correspond main shaft and impeller and be provided with the oil chamber cap, oil chamber cap and impeller between form the seal chamber, the main shaft on correspond oil chamber cap department and be provided with the mechanical seal quiet ring, the main shaft on be close to one side of impeller and be provided with the mechanical seal rotating ring, the lateral wall of seal chamber on correspond mechanical seal quiet ring and mechanical seal rotating ring and be provided with double spiral groove, mechanical seal quiet ring and oil chamber cap between be provided with multi-functional sealing washer, one side that is located the seal chamber of multi-functional sealing washer be provided with edulcoration mechanism, edulcoration mechanism including setting up the arch on one side that is close to the mechanical seal rotating ring of multi-functional sealing washer, multi-functional sealing washer and protruding in be provided with the gas storage chamber, multi-functional sealing washer in be provided with the air guide passageway with the gas, the air guide channel is provided with a sliding cavity, a sliding block is connected in the sliding cavity in a sliding mode, the multifunctional sealing ring is provided with a flow guide channel communicated with the sliding cavity and the sealing cavity, and the mechanical sealing ring is provided with a protruding block corresponding to the protruding block. The main shaft of the motor is connected with an impeller, an oil chamber cover is arranged on the pump body corresponding to the main shaft and the impeller, a sealing cavity is formed between the oil chamber cover and the impeller, a machine seal static ring is arranged on the main shaft corresponding to the oil chamber cover, a machine seal movable ring is arranged on one side of the main shaft close to the impeller, and double spiral grooves are arranged on the side wall of the sealing cavity corresponding to the machine seal static ring and the machine seal movable ring, when the pump normally operates, impurities and small fine sand particles are thrown towards the impeller by centrifugal force in the rotation process of the oil chamber cover, so that a large amount of particles cannot be gathered at the machine seal position, the self-cleaning effect of the machine seal can be achieved, the service life of the machine seal is prolonged, and the existing water leakage condition of the pump is prevented, a multifunctional sealing ring is arranged between the machine seal static ring and the oil chamber cover, one side of the multifunctional sealing ring, which is positioned in the sealing cavity, the multifunctional sealing ring and the bulge are internally provided with gas storage cavities, the multifunctional sealing ring is internally provided with a gas guide channel communicated with the gas storage cavities, the gas guide channel is provided with a sliding cavity, the sliding cavity is internally and slidably connected with a sliding block, the multifunctional sealing ring is provided with a flow guide channel communicated with the sliding cavity and the sealing cavity, one end of the flow guide channel is connected to one side of the sliding cavity, which is far away from the gas guide channel, the mechanical seal ring is provided with a lug corresponding to the bulge, when the pump runs, a main shaft on the motor rotates and drives the mechanical seal ring to rotate simultaneously, when the mechanical seal ring rotates, the lug on the mechanical seal ring can be abutted against the bulge according to certain frequency, when the lug is abutted against the bulge, the bulge can be pressed towards the inside of the multifunctional sealing ring, so that gas in the gas storage cavities after being extruded flows into the gas guide channel, then gas in the gas guide channel can flow, when the sliding block moves, water flow entering the sliding cavity is discharged along the flow guide channel, and the water flow with certain impact force enters the sealing cavity, so that impurity particles gathered at the mechanical seal position can be dispersed, the mechanical seal self-cleaning effect can be further achieved, and the self-cleaning effect is very stable.

Preferably, the cross section of the multifunctional sealing ring is Z-shaped. The cross-section of multi-functional sealing washer is the Z type for multi-functional sealing washer can laminate steadily between quick-witted stationary seal ring and the grease chamber lid, and the leakproofness is good.

Preferably, the number of the impurity removing mechanisms arranged on the multifunctional sealing ring is multiple. The number of the impurity removing mechanisms arranged on the multifunctional sealing ring is multiple, the number of the convex blocks corresponding to the multifunctional sealing ring can also be multiple, the self-cleaning effect of certain frequency is ensured through the rotation of the motor spindle, and the stability is good.

Preferably, the multifunctional sealing ring is made of rubber materials. The multifunctional sealing ring is made of rubber materials, is easy to process, has good corrosion resistance and long service life.

Preferably, the number of the impurity removing mechanisms arranged on the multifunctional sealing ring is 4. The quantity of the edulcoration mechanism that sets up on the multi-functional sealing washer is 4, and 4 edulcoration mechanisms set up on the multi-functional sealing washer around the even interval of main shaft, have guaranteed the automatically cleaning effect.

Preferably, the cross-sectional diameter of the seal cavity gradually increases towards the impeller. The diameter of the cross section of the sealing cavity is gradually increased towards the direction close to the impeller, so that the particle impurities are conveniently discharged along the direction of the impeller after being acted by centrifugal force.

Preferably, the oil chamber cover is fixed to the pump body by a bolt. The oil chamber cover is fixed on the pump body through a bolt, and the connection is very stable.

Therefore, the utility model discloses a stable form submersible sewage pump machine seals automatically cleaning structure possesses following advantage: the utility model discloses a machine seals department can not have a large amount of granule aggregations, can reach the machine and seal automatically cleaning effect to extension machine seals life, the condition that the pump leaked can not appear, and the effect of automatically cleaning is very stable moreover.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a sectional view of an oil chamber cover of the present invention.

Fig. 4 is a cross-sectional view of a prior art oil chamber cover.

Illustration of the drawings: 1-pump body, 2-motor, 3-impeller, 4-oil chamber cover, 5-mechanical seal static ring, 6-mechanical seal moving ring, 7-double spiral groove, 8-multifunctional seal ring, 9-lug, 10-bulge, 11-gas storage cavity, 12-gas guide channel, 13-sliding cavity, 14-sliding block, 15-flow guide channel, 16-seal cavity, 17-plane type structure and 18-main shaft.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1:

as shown in fig. 1 and 2, a stable self-cleaning structure for a mechanical seal of a submersible sewage pump comprises a pump body 1 and a motor 2, wherein a main shaft 18 of the motor 2 is connected with an impeller 3, the pump body 1 is provided with an oil chamber cover 4 corresponding to the main shaft 18 and the impeller 3, a sealing cavity 16 is formed between the oil chamber cover 4 and the impeller 3, a mechanical seal static ring 5 is arranged on the main shaft 18 corresponding to the oil chamber cover 4, a mechanical seal moving ring 6 is arranged on one side of the main shaft 18 close to the impeller 3, and a double-spiral groove 7 is arranged on the side wall of the sealing cavity 16 corresponding to the mechanical seal static ring 5 and the mechanical seal moving ring 6, when the pump normally operates, impurities and small fine sand particles are thrown towards the impeller 3 under the action of centrifugal force in the rotating process on the double-spiral groove 7 on the oil chamber cover 4, so that a large amount of particles cannot be gathered at the mechanical seal position, thereby achieving the self-cleaning, a multifunctional sealing ring 8 is arranged between the machine seal static ring 5 and the oil chamber cover 4, one side of the multifunctional sealing ring 8, which is positioned in a sealing cavity 16, is provided with an impurity removing mechanism, the impurity removing mechanism comprises a bulge 10 which is arranged on one side of the multifunctional sealing ring 8, which is close to the machine seal dynamic ring 6, an air storage cavity 11 is arranged in the multifunctional sealing ring 8 and the bulge 10, an air guide channel 12 communicated with the air storage cavity 11 is arranged in the multifunctional sealing ring 8, a sliding cavity 13 is arranged on the air guide channel 12, a sliding block 14 is connected in the sliding cavity 13 in a sliding way, a flow guide channel 15 communicated with the sliding cavity 13 and the sealing cavity 16 is arranged on the multifunctional sealing ring 8, one end of the flow guide channel 15 is connected to one side of the sliding cavity 13, which is far away from the air guide channel 12, a convex block 9 corresponding to the bulge 10 is arranged on the machine seal dynamic ring 6, the lug 9 on the mechanical seal moving ring 6 can be abutted to the lug 10 according to a certain frequency, when the lug 9 is abutted to the lug 10, the lug 10 can be pressed towards the inside of the multifunctional sealing ring 8, so that the gas in the gas storage cavity 11 flows into the gas guide channel 12 after the gas storage cavity 11 is extruded, then the gas in the gas guide channel 12 can flow into the sliding cavity 13, the gas entering the sliding cavity 13 can push the sliding block 14 to move, when the sliding block 14 moves, the water flow entering the sliding cavity 13 can be discharged along the flow guide channel 15, and the water flow with a certain impact force is formed and then enters the sealing cavity 16, so that impurity particles gathered at the mechanical seal position can be dispersed, the mechanical seal self-cleaning effect can be further achieved, and the self-cleaning effect is very stable.

The cross-section of multi-functional sealing washer 8 is the Z type for multi-functional sealing washer 8 can laminate steadily between quick-witted seal stationary ring 5 and grease chamber lid 4, and the leakproofness is good.

The multifunctional sealing ring 8 is provided with a plurality of impurity removing mechanisms, and the number of the corresponding lugs 9 can also be a plurality, so that the self-cleaning effect with certain frequency is ensured through the rotation of the main shaft of the motor 2, and the stability is good; in this embodiment, the number of the edulcoration mechanism that sets up on the multi-functional sealing washer 8 is 4, and 4 edulcoration mechanisms set up on multi-functional sealing washer 8 around the even interval of main shaft, have guaranteed the automatically cleaning effect.

The multifunctional sealing ring 8 is made of rubber materials, is easy to process, has good corrosion resistance and long service life.

As shown in fig. 3, the cross-sectional diameter of the seal chamber 16 is gradually increased toward the impeller 3, thereby facilitating the discharge of the particulate impurities along the impeller 3 by the centrifugal force.

The oil chamber cover 4 is fixed on the pump body 1 through bolts and is very firmly connected.

It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims

1. The utility model provides a stable form submersible sewage pump machine seals automatically cleaning structure, includes the pump body and motor, the main shaft of motor on be connected with the impeller, the pump body on correspond main shaft and impeller and be provided with the oil chamber cap, oil chamber cap and impeller between form sealed chamber, the main shaft on correspond oil chamber cap department and be provided with the mechanical seal quiet ring, one side that is close to the impeller on the main shaft be provided with the mechanical seal rotating ring, its characterized in that, the lateral wall in sealed chamber on correspond mechanical seal quiet ring and mechanical seal rotating ring and be provided with double spiral groove, mechanical seal quiet ring and oil chamber cap between be provided with multi-functional sealing washer, one side that is located sealed chamber of multi-functional sealing washer be provided with edulcoration mechanism, edulcoration mechanism including setting up the arch on one side that is close to the mechanical seal rotating ring in multi-functional sealing washer, multi-functional sealing washer and arch in be provided with the gas storage chamber, the multifunctional sealing ring is internally provided with an air guide channel communicated with the air storage cavity, the air guide channel is provided with a sliding cavity, the sliding cavity is internally and slidably connected with a sliding block, the multifunctional sealing ring is internally provided with a flow guide channel communicated with the sliding cavity and the sealing cavity, and the mechanical sealing ring is provided with a lug corresponding to the bulge.

2. The stable submersible sewage pump machine seal self-cleaning structure according to claim 1, wherein the cross section of the multifunctional seal ring is Z-shaped.

3. The stable submersible sewage pump mechanical seal self-cleaning structure of claim 1, wherein the number of the impurity removing mechanisms arranged on the multifunctional sealing ring is multiple.

4. A stable submersible sewage pump seal self-cleaning structure as claimed in claim 1, 2 or 3 wherein the multifunctional seal ring is made of rubber material.

5. The stable submersible sewage pump mechanical seal self-cleaning structure of claim 4, wherein the number of the impurity removing mechanisms arranged on the multifunctional sealing ring is 4.

6. A stable submersible sewage pump seal self-cleaning structure as claimed in claim 1, 2 or 3 wherein the cross-sectional diameter of said seal cavity increases progressively towards the impeller.

7. A stable submersible sewage pump mechanical seal self-cleaning structure as claimed in claim 1, 2 or 3, wherein the oil chamber cover is fixed on the pump body by bolts.