CN210509604U

CN210509604U - High-pressure relief detachable multi-stage centrifugal submersible pump

Info

Publication number: CN210509604U
Application number: CN201921108816.0U
Authority: CN
Inventors: 张君波
Original assignee: Junhe Pumps Holding Co ltd
Current assignee: Junhe Pumps Holding Co ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-05-12
Anticipated expiration: 2029-07-16

Abstract

The utility model discloses a high-pressure relief detachable multistage centrifugal submersible pump, which comprises a base component, a multistage guide vane component and a motor component which are sequentially connected in series through plug connectors, wherein the motor component comprises a pump body and a direct current motor, a waterproof motor cavity and a flow channel are arranged in the pump body, a water outlet is arranged at one end of the flow channel, the direct current motor is arranged in the waterproof motor cavity, and a first dynamic seal is arranged between a motor shaft and the waterproof motor cavity; the multi-stage guide vane assembly is composed of more than one group of guide vane units, and each group of guide vane units comprises an impeller and a flow guide disc; a motor shaft of the direct current motor is in transmission connection with each stage of impeller, the base assembly is fixedly connected with the multi-stage guide vane assembly in series, an interstage seal is arranged between the base assembly and the adjacent guide vanes, and a water inlet is formed in the side face of the base assembly. The utility model discloses multistage centrifugal submersible pump can be dismantled in the high pressure release that obtains, dismantles easy maintenance, and small in size just has better sealing performance, is applicable to various high pressures, constrictive service environment.

Description

High-pressure relief detachable multi-stage centrifugal submersible pump

Technical Field

The utility model relates to a immersible pump, especially a multistage centrifugal immersible pump can be dismantled in high pressure release.

Background

Present multistage immersible pump for well, the form of adopting the integral type pump body and motor to be connected more, when impeller and other parts inside the maintenance pump body, need be with the thorough split of the pump body, the maintenance degree of difficulty is big, and the pump body generally includes the integral type dustcoat, lead to submersible pump is bulky and heavy, it is higher to make installation cost, be difficult to use in narrow environment, in the in-service use, traditional multistage pump carries out the pressure release through the gap between axle and the impeller more, when liquid impurity is more, it is insufficient still to appear the pressure release easily, lead to the condition that the motor intake.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above-mentioned prior art not enough and provide one kind and dismantle easy maintenance, small in size and sealed effectual high pressure release can dismantle multistage centrifugal submersible pump.

In order to achieve the purpose, the high-pressure relief detachable multistage centrifugal submersible pump comprises a base assembly, a multistage guide vane assembly and a motor assembly, wherein the base assembly, the multistage guide vane assembly and the motor assembly are sequentially connected in series through plug connectors, the motor assembly comprises a pump body and a motor, a waterproof motor cavity and a runner surrounding the waterproof motor cavity are arranged in the pump body, a water outlet is formed in one end, away from the multistage guide vane assembly, of the runner, the motor is installed in the waterproof motor cavity, a motor shaft of the motor extends out of the waterproof motor cavity, and a first dynamic seal is arranged between the motor shaft and the waterproof motor cavity; the multistage guide vane assembly is formed by connecting more than one group of guide vane units in series, each group of guide vane unit comprises an impeller and a guide disc, the impeller is rotatably arranged in the guide disc, the water inlet end of the impeller extends into the water outlet end of the adjacent guide disc, the upper edge of each guide disc is embedded into the lower edge of the adjacent guide disc, and interstage seals are arranged at the embedding parts of the adjacent guide discs; a motor shaft of the motor is in transmission connection with impellers of all stages, the end part of the motor shaft is axially fixed with the impeller of the guide vane unit which is farthest from the motor, the base assembly is fixedly connected with the guide vane assemblies in series, interstage seals are arranged between the base assembly and the adjacent guide vanes, a water inlet is arranged on the side surface of the base assembly, a filter ring with a small hole is fixed inside the base assembly, and the filter ring is arranged between the water inlet and the water inlet end of the impeller of the adjacent guide vane unit; in the actual installation process, the traditional integrated outer cover is replaced by the split type structure formed by serially connecting the guide vane units, the size of the submersible pump is reduced, the installation of the submersible pump is facilitated, and meanwhile, interstage sealing can effectively avoid interstage leakage of the split type structure.

In order to facilitate processing and installation and avoid high-pressure liquid from permeating into a waterproof motor cavity, the pump body consists of a gland, a front cover, a pump shell and a rear cover, the pump shell is a double-layer annular shell, a flow channel is arranged on the side wall of the pump shell, the motor is installed in the middle of the pump shell and is completely isolated from the flow channel, the front cover and the rear cover are fixed at two ends of the pump shell in a sealing mode so as to form the waterproof motor cavity, a bearing and the first dynamic seal are arranged between the front cover and a motor shaft, and the bearing is located in the waterproof; the motor shaft is connected with the front cover, the motor shaft is connected with the motor shaft through the front cover, the motor.

In order to reduce the size of the gland and facilitate installation and manufacture, the second dynamic seal can be an isolating ring arranged between a motor shaft and the gland, and a gap exists between the isolating ring and the gland; in practical use, when high-pressure liquid in the lower multi-stage guide vane assembly flows, the excessive pressure enables part of the fluid to flow into the high-pressure relief hole through the gap and be discharged from the high-pressure relief hole.

In order to ensure the sealing performance and reduce the pressure born by the leather cup, the second dynamic seal consists of a mechanical seal and a check ring for axially positioning the mechanical seal, the check ring is fixed on the motor shaft, the periphery of the mechanical seal is in sealing fit with the gland, and a gap is reserved at the matching position of the mechanical seal, the motor shaft and the check ring; in practical use, high-pressure liquid can pass through gaps among the retainer ring, the motor shaft and the mechanical seal and be discharged from the high-pressure relief hole.

In order to avoid the immersible pump to be died the damage by the debris card in the work, the activity has cup jointed the sealing ring on the intake end of impeller, leaves the gap between sealing ring and the impeller, the sealing ring is located the play water end of corresponding flow guide disc, and when the pump was taken water, the sealing ring was closely laminated with the flow guide disc under the water pressure effect.

In order to improve the sealing performance of the waterproof motor cavity, an oil cavity is arranged in the front cover, a pair of sealing gaskets is arranged at two ends of the first dynamic seal, after the pressing cover is connected with the front cover, the sealing gaskets are pressed at the matching position of the motor shaft and the pressing cover or the front cover, and the first dynamic seal is sealed in the oil cavity and immersed in sealing oil in the oil cavity.

For convenience of assembly and disassembly, the plug connector is a long bolt.

In order to enable the submersible pump to be suitable for working in a gas-liquid mixture and improve the starting speed of the submersible pump, the side face of the flow guide disc adjacent to the base assembly is provided with an air hole, and the air hole is communicated with the outside.

In order to facilitate the carrying of the submersible pump, a handle for carrying the submersible pump is arranged on the rear cover.

The utility model discloses multistage centrifugal submersible pump can be dismantled in high pressure release that obtains, install the stator subassembly in the integral type shell in traditional water pump and improve to split type structure, for the dismantlement maintenance of immersible pump provides facility, simultaneously because its water inlet and delivery port are located the bottom and the top of pump respectively, the small in size of immersible pump can be applicable to the pump work of sucking in shallow water and narrow space, and has improved current pressure release mode, has improved the sealed effect in immersible pump motor chamber.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the high-pressure relief detachable multistage centrifugal submersible pump of the present invention;

FIG. 2 is an enlarged schematic view of the multi-stage guide vane assembly of embodiment 1;

fig. 3 is a schematic structural view of a motor assembly in embodiment 2 of the high-pressure relief detachable multistage centrifugal submersible pump of the present invention;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

FIG. 5 is a schematic structural view of embodiment 3 of the high-pressure relief detachable multistage centrifugal submersible pump of the present invention;

FIG. 6 is an enlarged schematic view at B in FIG. 5;

fig. 7 is an enlarged schematic view of the second dynamic seal in embodiment 3.

In the figure: the water-saving water pump comprises a motor assembly 1, a multi-stage guide vane assembly 2, a base assembly 3, a plug connector 4, a pump body 10, a motor 11, a first dynamic seal 12, a gland 13, a front cover 14, a pump shell 15, a rear cover 16, a bearing 17, a second dynamic seal 18, a leather cup 19, a guide vane unit 20, an impeller 21, a deflector 22, an interstage seal 23, a seal ring 24, a water inlet 30, a filter ring 31, a waterproof motor cavity 100, a flow channel 101, a water outlet 102, a motor shaft 110, a high-pressure relief hole 130, an oil cavity 140, a seal washer 141, a handle 160, a spacer ring 180, a machine seal 181, a retainer ring 182, a water inlet end 210, a water outlet end 220, an upper edge 221.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example 1:

the high-pressure relief detachable multistage centrifugal submersible pump described in this embodiment, as shown in fig. 1, includes a base assembly 3, a multistage guide vane assembly 2, and a motor assembly 1, the base assembly 3, the multistage guide vane assembly 2, and the motor assembly 1 are sequentially connected in series by a plug connector 4, the motor assembly 1 is composed of a pump body 10 and a motor 11, a waterproof motor cavity 100 and a flow channel 101 surrounding the waterproof motor cavity 100 are provided in the pump body 10, a water outlet 102 is provided at one end of the flow channel 101 away from the multistage guide vane assembly 2, the motor 11 is installed in the waterproof motor cavity 100, a motor shaft 110 of the motor 11 extends out of the waterproof motor cavity 100, and a first dynamic seal 12 is provided between the motor shaft 110 and the waterproof motor; as shown in fig. 2, the multi-stage guide vane assembly 2 is formed by connecting more than one group of guide vane units 20 in series, each group of guide vane unit 20 includes an impeller 21 and a deflector 22, the impeller 21 is rotatably installed in the deflector 22, a water inlet end 210 of the impeller 21 extends into a water outlet end 220 of an adjacent one-stage deflector 22, an upper edge 221 of each deflector 22 is embedded into a lower edge 222 of the adjacent one-stage deflector 22, and an interstage seal 23 is arranged at the embedding position of the adjacent deflector 22; a motor shaft 110 of the motor 11 is in transmission connection with impellers 21 of all stages, the end part of the motor shaft 110 is axially fixed with the impeller 21 of the guide vane unit 20 at the stage farthest from the motor 11, the base assembly 3 is fixed in series with the guide vane assemblies 2 of all stages, an interstage seal 23 is arranged between the base assembly 3 and the adjacent deflector 22, a water inlet 30 is arranged on the side surface of the base assembly 3, a filter ring 31 with a small hole is fixed inside the base assembly 3, and the filter ring 31 is arranged between the water inlet 30 and the water inlet end 210 of the impeller 21 of the adjacent guide vane unit 20; in the actual installation process, the split type structure with the guide vane units 20 connected in series replaces the traditional integrated outer cover, the size of the submersible pump is reduced, meanwhile, the installation of the submersible pump is facilitated, and meanwhile, the interstage seals 23 can effectively avoid interstage leakage of the split type structure.

For convenience of assembly and disassembly, the plug connector 4 is a long bolt.

In this embodiment, interstage seal 23 is an O-ring seal disposed between diaphragms 22.

In order to avoid the submersible pump from being stuck and damaged by impurities in the operation process, as shown in fig. 2, the water inlet end 210 of the impeller 21 is movably sleeved with the sealing ring 24, a gap is reserved between the sealing ring 24 and the impeller 21, the sealing ring 24 is positioned on the water outlet end 220 of the corresponding deflector 22, and when the pump pumps water, the sealing ring 24 is tightly attached to the deflector 22 under the action of water pressure.

In the actual work process, put the immersible pump into the aquatic, the water logging submerges base subassembly 3, the motor operation this moment, it is rotatory to drive impeller 21, water flows in from the water inlet 30 of immersible pump bottom under multistage stator subassembly 2 impeller 21 layer upon layer effect, after the pressurization, flow to delivery port 102 back along the water route in the pump, at this in-process, sealing ring 24 pastes the guide plate 22 and impeller 21 under the water pressure effect and intakes the end 210 outside, play sealed effect, simultaneously because this is sealed to possess certain elasticity, can not be because debris such as silt card is dead between impeller 21 intake end 210 and the guide plate 22.

The multistage centrifugal submersible pump can be dismantled in high pressure release that this embodiment provided, install the stator subassembly in the integral type shell in traditional water pump and improve to split type structure, the dismantlement maintenance of immersible pump provides convenience, simultaneously because its water inlet 30 and delivery port 102 are located the bottom and the top of pump respectively, the small in size of immersible pump, can be applicable to shallow water, the pump under the more environment of narrow space and impurity pumps work, through the form that encircles motor 11 and set up with runner 101, make full use of the heat dissipation function of water, the continuous operation time of immersible pump motor 11 has been prolonged, the working property of immersible pump has been improved.

Example 2:

the high-pressure relief detachable multistage centrifugal submersible pump described in this embodiment is, as shown in fig. 3 and 4, in addition to the features described in embodiment 1, for convenience of processing and installation, and avoiding high-pressure liquid from permeating into the waterproof motor cavity 100, the pump body 10 is composed of a gland 13, a front cover 14, a pump shell 15 and a rear cover 16, the pump shell 15 is a double-layer annular shell, a flow channel 101 is arranged on a side wall of the pump shell, the motor 11 is installed in the middle of the pump shell 15 and is completely isolated from the flow channel 101, the front cover 14 and the rear cover 16 are hermetically fixed at two ends of the pump shell 15 to form the waterproof motor cavity 100, a bearing 17 and the first dynamic seal 12 are arranged between the front cover 14 and the motor shaft 110, and the bearing 17; two ends of the gland 13 are respectively connected with the front cover 14 and the multistage guide vane assembly 2, a second dynamic seal 18 and a leather cup 19 are arranged between the gland 13 and the motor shaft 110, a high-pressure relief hole 130 for communicating the motor shaft 110 with the outside is radially arranged on the gland 13, and one end of the high-pressure relief hole 130 is arranged between the second dynamic seal 18 and the leather cup 19.

In order to ensure the sealing performance, as shown in fig. 4, the pressure borne by the cup leather 19 is reduced, the second dynamic seal 18 is composed of a mechanical seal 181 and a retaining ring 182 for axially positioning the mechanical seal 181, the retaining ring 182 is fixed on the motor shaft 110, the outer periphery of the mechanical seal 181 is in sealing fit with the gland 13, and a gap is left at the matching position of the mechanical seal 181, the motor shaft 110 and the retaining ring 182.

In order to improve the sealing performance of the waterproof motor cavity 100, as shown in fig. 4, an oil cavity 140 is provided in the front cover 14, a pair of sealing gaskets 141 are provided at both ends of the first dynamic seal 12, after the pressing cover 13 is connected with the front cover 14, the sealing gaskets 141 are pressed at the matching position of the motor shaft 110 and the pressing cover 13 or the front cover 14, and the first dynamic seal 12 is sealed inside the oil cavity 140 and immersed in the sealing oil in the oil cavity 140.

The multistage centrifugal submersible pump can be dismantled in high-pressure release that this embodiment provided, in the in-service use, first dynamic seal 12 submergence all the time is in sealed oil, not with the contact of rivers and impurity, better lubrication has, sealed effect and longer life, simultaneously, when the high-pressure liquid in the multistage stator vane subassembly 2 in below flows through, too big pressure makes liquid follow the gap between machine seal 181 and the retaining ring 182 and gets into between machine seal 181 and the motor shaft 110, and finally flow into high-pressure relief hole 130, and discharge from high-pressure relief hole 130, the direct pressure release in high-pressure relief hole 130 has been adopted, the outside fluid pressure in waterproof motor chamber 100 has been reduced, the leakproofness in waterproof motor chamber 100 has been improved, make this submersible pump can be applicable to darker environment and great operating pressure under water.

Example 3:

as shown in fig. 5 and 6, the present embodiment is different from embodiment 2 in that, in order to enable the submersible pump to adapt to work in a gas-liquid mixture and increase the starting speed of the submersible pump, an air hole 223 is formed in the side surface of the deflector 22 of the guide vane unit 20 adjacent to the base assembly 3, and the air hole 223 is communicated with the outside.

In order to reduce the size of the gland 13 and facilitate the installation and manufacture, as shown in fig. 7, the second dynamic seal 18 may be a spacer ring 180 disposed between the motor shaft 110 and the gland 13, and a gap exists between the spacer ring 180 and the gland 13.

To facilitate carrying the submersible pump, as shown in fig. 5, a handle 160 for carrying the submersible pump is provided on the rear cover 16.

In practical use, under the condition that there is a gas-liquid mixture, because the air hole 223 can discharge the air in the pump relatively quickly, the submersible pump starts up rapidly, and meanwhile, when the suction pressure is relatively high and the high-pressure liquid in the lower multi-stage guide vane assembly 2 flows through the second dynamic seal 18, the excessive pressure makes part of the fluid flow into the high-pressure relief hole 130 through the gap between the isolation ring 180 and the gland 13 and is discharged from the high-pressure relief hole 130.

The multistage centrifugal submersible pump can be dismantled in high pressure release that this embodiment provided, production, convenient to carry can also pump the work of pumping in the environment of gas-liquid mixture.

Claims

1. The utility model provides a multistage centrifugal submersible pump can be dismantled in high pressure release, it includes base subassembly (3), multistage stator subassembly (2) and motor element (1), characterized by base subassembly (3), multistage stator subassembly (2) and motor element (1) establish ties in proper order through plug connector (4), motor element (1) comprises pump body (10) and motor (11), be equipped with waterproof motor chamber (100) and encircle runner (101) of waterproof motor chamber (100) in the pump body (10), the one end that multistage stator subassembly (2) were kept away from in runner (101) is equipped with delivery port (102), motor (11) are installed in waterproof motor chamber (100), and its motor shaft (110) stretches out waterproof motor chamber (100), is equipped with first dynamic seal (12) between motor shaft (110) and waterproof motor chamber (100); the multistage guide vane assembly (2) is formed by connecting more than one group of guide vane units (20) in series, each group of guide vane unit (20) comprises an impeller (21) and a diversion disc (22), the impeller (21) is rotatably installed in the diversion disc (22), the water inlet end (210) of the impeller (21) extends into the water outlet end (220) of the adjacent diversion disc (22), the upper edge (221) of each diversion disc (22) is embedded into the lower edge (222) of the adjacent diversion disc (22), and an interstage seal (23) is arranged at the embedding part of the adjacent diversion disc (22); the guide vane unit structure is characterized in that a motor shaft (110) of the motor (11) is in transmission connection with impellers (21) of all stages, the end of the motor shaft (110) is axially fixed with the impeller (21) of the farthest guide vane unit (20) away from the motor (11), the base assembly (3) is fixed with the multi-stage guide vane assemblies (2) in series, an interstage seal (23) is arranged between the base assembly (3) and the adjacent guide vane (22), a water inlet (30) is formed in the side face of the base assembly (3), a filter ring (31) with a small hole is fixed inside the base assembly (3), and the filter ring (31) is arranged between the water inlet (30) and the water inlet end (210) of the impeller (21) of the adjacent guide vane unit (20).

2. The high-pressure relief detachable multistage centrifugal submersible pump according to claim 1, wherein the pump body (10) is composed of a gland (13), a front cover (14), a pump casing (15) and a rear cover (16), the pump casing (15) is a double-layer annular casing, a flow channel (101) is arranged on the side wall of the pump casing, the motor (11) is installed in the middle of the pump casing (15) and is completely isolated from the flow channel (101), the front cover (14) and the rear cover (16) are hermetically fixed at two ends of the pump casing (15) to form a waterproof motor cavity (100), a bearing (17) and the first dynamic seal (12) are arranged between the front cover (14) and a motor shaft (110), and the bearing (17) is located in the waterproof motor cavity (100); gland (13) both ends are connected with protecgulum (14) and multistage stator subassembly (2) respectively, are equipped with second dynamic seal (18) and leather cup (19) between gland (13) and motor shaft (110), radially are equipped with intercommunication motor shaft (110) and external high pressure relief hole (130) in gland (13), high pressure relief hole (130) one end sets up between second dynamic seal (18) and leather cup (19).

3. The high pressure relief detachable multistage centrifugal submersible pump according to claim 2, characterized in that the second dynamic seal (18) is a spacer ring (180) arranged between the motor shaft (110) and the gland (13), there being a gap between the outer circumference of the spacer ring (180) and the gland (13).

4. The high-pressure relief detachable multistage centrifugal submersible pump according to claim 2, wherein the second dynamic seal (18) is composed of a mechanical seal (181) and a retainer ring (182) for axially positioning the mechanical seal (181), the retainer ring (182) is fixed on the motor shaft (110), the outer periphery of the mechanical seal (181) is in sealing fit with the gland (13), and a gap is left at the fit position of the mechanical seal (181) with the motor shaft (110) and the retainer ring (182).

5. The high-pressure relief detachable multistage centrifugal submersible pump according to claim 1, wherein a sealing ring (24) is movably sleeved on a water inlet end (210) of the impeller (21), a gap is reserved between the sealing ring (24) and the impeller (21), the sealing ring (24) is positioned on a water outlet end (220) of the corresponding flow guide disc (22), and when the pump pumps water, the sealing ring (24) is tightly attached to the flow guide disc (22) under the action of water pressure.

6. The high-pressure relief detachable multistage centrifugal submersible pump according to claim 2, 3 or 4, characterized in that a sealing ring (24) is movably sleeved on the water inlet end (210) of the impeller (21), a gap is left between the sealing ring (24) and the impeller (21), the sealing ring (24) is positioned on the water outlet end (220) of the corresponding diversion disc (22), and when the pump pumps water, the sealing ring (24) is tightly attached to the diversion disc (22) under the action of water pressure.

7. The high-pressure relief detachable multistage centrifugal submersible pump according to claim 2, 3 or 4, characterized in that an oil chamber (140) is arranged in the front cover (14), a pair of sealing gaskets (141) are arranged at two ends of the first dynamic seal (12), when the gland (13) is connected with the front cover (14), the sealing gaskets (141) are pressed at the matching position of the motor shaft (110) and the gland (13) or the front cover (14), and the first dynamic seal (12) is sealed in the oil chamber (140) and immersed in sealing oil in the oil chamber (140).

8. The high-pressure relief detachable multistage centrifugal submersible pump according to claim 6, wherein an oil chamber (140) is arranged in the front cover (14), a pair of sealing gaskets (141) is arranged at two ends of the first dynamic seal (12), when the gland (13) is connected with the front cover (14), the sealing gaskets (141) are pressed at the matching position of the motor shaft (110) and the gland (13) or the front cover (14), and the first dynamic seal (12) is sealed inside the oil chamber (140) and immersed in sealing oil in the oil chamber (140).

9. The high-pressure relief detachable multistage centrifugal submersible pump according to claim 1, 2, 3 or 4, characterized in that an air hole (223) is provided on the side of the deflector (22) of the guide vane unit (20) adjacent to the base assembly (3), and the air hole (223) communicates with the outside of the pump.

10. The high-pressure relief detachable multistage centrifugal submersible pump according to claim 8, characterized in that an air hole (223) is provided on the side of the deflector (22) of the guide vane unit (20) adjacent to the base assembly (3), and the air hole (223) communicates with the outside of the pump.

11. High-pressure relief detachable multistage centrifugal submersible pump according to claim 1 or 2 or 3 or 4, characterized in that the plug (4) is a long bolt.

12. The high pressure relief detachable multistage centrifugal submersible pump according to claim 2, 3 or 4, characterized in that the rear cover (16) is provided with a handle (160) for carrying the submersible pump.