CN117028265A - Pump thrust device for balancing axial force - Google Patents
Pump thrust device for balancing axial force Download PDFInfo
- Publication number
- CN117028265A CN117028265A CN202311153033.5A CN202311153033A CN117028265A CN 117028265 A CN117028265 A CN 117028265A CN 202311153033 A CN202311153033 A CN 202311153033A CN 117028265 A CN117028265 A CN 117028265A
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- China
- Prior art keywords
- ring assembly
- pressure
- sealing
- cavity
- thrust device
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- 238000007789 sealing Methods 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 230000001105 regulatory effect Effects 0.000 claims abstract description 53
- 230000003068 static effect Effects 0.000 claims abstract description 46
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000003313 weakening effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 18
- 230000002829 reductive effect Effects 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
Abstract
The application relates to the technical field of vertical multistage centrifugal pumps, in particular to a pump thrust device for balancing axial force, which comprises a movable ring assembly and a static ring assembly arranged below the movable ring assembly, wherein a high-pressure sealing structure is further arranged between the movable ring assembly and the static ring assembly, the high-pressure sealing structure comprises a buoyancy regulating unit, the buoyancy regulating unit is arranged in an inner cavity of the static ring assembly, and the buoyancy regulating unit comprises a high-pressure water channel communicated with a high-pressure water inlet cavity; the sealing unit comprises a high-pressure cavity, the bottom of the high-pressure cavity is connected with the buoyancy regulating unit, and the top of the high-pressure cavity is provided with a water film isolation part connected with the movable ring assembly. The application solves the problem of weakening the tightness between the moving ring assembly and the static ring assembly caused by the friction pair between the moving ring assembly and the static ring assembly for a long time in optimizing the concrete structure of the moving ring assembly and the static ring assembly and the matching relation between the moving ring assembly and the static ring assembly, protects the vertical multistage centrifugal pump to balance the axial force under the assistance of the pump thrust device, and has longer service life.
Description
Technical Field
The application relates to the technical field of vertical multistage centrifugal pumps, in particular to a pump thrust device for balancing axial force.
Background
The light vertical multistage centrifugal pump is mainly applied to the fields of high-rise pressurization supply, industrial cleaning systems, cooling systems and the like. In the structure of the existing vertical multistage centrifugal pump, axial force points to an impeller outlet, low-stage axial force is small and acts on a motor bearing, axial force of a bearing balancing part is large, and high-stage axial force is large, if bearing is used, serious influence can be caused on the service life of the bearing, so that the whole pump is damaged, customer satisfaction is reduced, and damage is caused to the quality and reputation of a company. In order to solve the problem, an axial force balancing device is usually arranged in a water inlet and outlet section of the light vertical multistage centrifugal pump so as to solve the problem of damage to the whole pump caused by balancing the axial force of a part by virtue of a motor bearing.
The application discloses a novel axial force balancing device of a multistage pump in domestic application with the application number of CN202110175033.X, which relates to the field of vertical multistage centrifugal pumps and comprises a movable ring assembly and a static ring assembly, wherein a cavity is formed in the lower part of the movable ring assembly for placing the movable ring; the top of the transmission seat is provided with a pump shaft hole communicated with the cavity, and the pump shaft is inserted into the pump shaft hole and is fixedly connected with the inner wall of the transmission seat to drive the movable ring component; the upper clamping groove of the sealing seat of the static ring assembly is embedded and provided with a static ring, one end of an anti-rotation pin is inserted and arranged on the sealing seat, and the other end of the anti-rotation pin is inserted into the static ring, so that the static ring and the sealing seat do not rotate relatively; a liquid high-pressure cavity is formed in the sealing seat, a plurality of connecting holes are formed in the outer wall of the sealing seat along the radial direction, one end of each connecting hole is communicated with the liquid high-pressure cavity, and the other end of each connecting hole is communicated with the water outlet. Although friction pairs are generated between the fixed stationary ring and the movable ring, the low-pressure liquid at the water inlet and the high-pressure liquid at the water outlet are sealed; the movable ring component rotates along with the pump shaft, meanwhile, the static ring component is connected with the water inlet and outlet section to form bottom seal, high-pressure liquid at the water outlet returns to the water outlet of the water inlet and outlet section through the pressure-resistant cylinder, and reaches the high-pressure liquid cavity of the liquid through the connecting hole on the sealing seat to form pressure difference with low-pressure liquid at the water inlet, and the direction of the pressure is opposite to the direction of the axial force, so that the effect of balancing part of the axial force is achieved. However, due to the abrasion between the movable ring assembly and the static ring assembly, the tightness between the movable ring assembly and the static ring assembly is weakened in long-term use, and the axial force balancing device cannot continue to normally complete work.
Disclosure of Invention
In order to solve the problems, the application provides a pump thrust device for balancing axial force and a vertical multistage centrifugal pump, which solve the problem of weakening the sealing property between a movable ring assembly and a static ring assembly caused by friction pairs between the movable ring assembly and the static ring assembly for a long time in optimizing the specific structures of the movable ring assembly and the static ring assembly and the matching relation between the movable ring assembly and the static ring assembly, protect the vertical multistage centrifugal pump, balance the axial force under the assistance of the pump thrust device, and have longer service life.
In order to achieve the above object, the present application provides a pump thrust device for balancing axial force, a moving ring assembly and a stationary ring assembly disposed below the moving ring assembly, wherein the moving ring assembly includes a thrust disc, a moving ring rubber ring, a moving seal ring, and a stationary sleeve, a high pressure seal structure is further disposed between the moving ring assembly and the stationary ring assembly, and the high pressure seal structure includes:
the buoyancy regulating unit is arranged in the inner cavity of the static ring assembly and comprises a high-pressure water channel communicated with the high-pressure water inlet cavity;
the sealing unit comprises a high-pressure cavity, the bottom of the high-pressure cavity is connected with the buoyancy regulating unit, and the top of the high-pressure cavity is provided with a water film isolation part connected with the movable ring assembly.
Furthermore, the buoyancy regulating unit is a buoyancy bottom plate with the high-pressure water gap, an upward protruding connecting inserting ring is arranged on the periphery of the buoyancy regulating unit, and the buoyancy regulating unit is connected with the slot in a matched mode after being upwards floated by high-pressure thrust of high-pressure water inlet.
Further, the stationary ring assembly comprises an upper sealing part and a lower sealing base, the upper sealing part and the lower sealing base are assembled to form a plurality of high-pressure water inlet channels and high-pressure water inlet cavities, the high-pressure water inlet channels are connected with the high-pressure water inlet cavities, the high-pressure sealing structure is connected in the inner cavity of the upper sealing part, and the high-pressure sealing structure can move up and down relative to the inner cavity of the upper sealing part.
Further, the upper end of the inner cavity of the upper sealing part is provided with a supporting groove which is recessed downwards, the supporting groove is provided with a middle rotation stopping pin, the sealing unit is provided with a static sealing ring which is connected with the supporting groove in a matched mode in an outward protruding mode, and the static sealing ring is provided with a position stopping recess which is recessed inwards and matched with the middle rotation stopping pin in a position stopping mode.
Further, a multistage pressure regulating part is arranged at the joint of the sealing unit and the movable ring assembly, the multistage pressure regulating part comprises a primary pressure reducing groove and a final pressure reducing groove which are mutually connected from bottom to top, the primary pressure reducing groove forms a primary pressure reducing channel, and the final pressure reducing groove forms a final pressure reducing channel.
Further, the primary depressurization channel has an inner diameter smaller than an inner diameter of the final depressurization channel.
Further, the inner diameter of the final-stage depressurization channel is larger than the inner diameter of the joint of the movable sealing ring and the multistage pressure regulating part.
Further, protruding or recessed guide vanes are arranged on the connecting part of the movable sealing ring and the multi-stage pressure regulating part, and the part of the connecting part of the movable sealing ring and the multi-stage pressure regulating part, which extends out of the top of the multi-stage pressure regulating part, faces the multi-stage pressure regulating part.
Further, the guide vanes are folded towards the center shaft of the sealing unit in a rotating mode.
Compared with the prior art, the application has the beneficial effects that:
1. according to the application, the problem of reduced tightness between the movable ring assembly and the static ring assembly due to the friction pair between the long-term movable ring assembly and the static ring assembly is solved by optimizing the specific structures of the movable ring assembly and the static ring assembly and the matching relation between the movable ring assembly and the static ring assembly, the vertical multistage centrifugal pump is protected, the axial force is balanced under the assistance of the pump thrust device, and the vertical multistage centrifugal pump has a long service life.
2. According to the application, the new high-pressure sealing structure is added in the optimal design, the buoyancy regulating and controlling unit is matched with the static ring assembly, and the high-pressure water area in the static ring assembly is used for giving the upward thrust to the buoyancy regulating and controlling unit, so that the high-pressure sealing structure is stably connected with the movable ring assembly, the problem that the axial force balancing device cannot continuously and normally finish work due to the fact that the movable ring assembly and the static ring assembly are worn is avoided, and the sealing performance between the movable ring assembly and the static ring assembly is weakened in long-term use.
3. The part, extending out of the top of the multi-stage pressure regulating part, of the joint of the movable sealing ring and the multi-stage pressure regulating part is provided with protruding or recessed guide vanes towards the multi-stage pressure regulating part, and when two water areas with different pressures are contacted, liquid flow is guided through the guide vane structure and a stable water film is formed.
For a better understanding and implementation, the present application is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a cross-sectional view of a pump thrust device for balancing axial forces of the present application;
FIG. 2 is a cross-sectional view of a moving ring assembly in a pump thrust device for balancing axial forces in accordance with the present application;
FIG. 3 is a cross-sectional view of a high pressure seal in a pump thrust device for balancing axial forces in accordance with the present application;
FIG. 4 is a cross-sectional view of a stationary ring assembly in a pump thrust device for balancing axial forces in accordance with the present application;
fig. 5 is a bottom view of a dynamic seal ring in a pump thrust device for balancing axial forces in accordance with the present application.
In the figure: 1. a moving ring assembly; 101. a thrust plate; 102. a movable ring rubber ring; 103. a dynamic seal ring; 1031. a guide vane; 104. a fixed sleeve; 2. a high pressure seal structure; 201. a buoyancy control unit; 2011. a high-pressure water gap; 2012. connecting the insert ring; 202. a sealing unit; 2021. a high pressure chamber; 2022. a slot; 2023. a static seal ring; 2024. a stop recess; 2025. a multistage pressure regulating part; 2025a, primary depressurization tank; 2025b, final stage depressurization tank; 203. a water film isolation part; 3. a stationary ring assembly; 3a, an upper sealing part; 3a1, a supporting groove; 3a2, a middle rotation stopping pin; 3b, a lower sealing base; 3D, high-pressure water inlet channel; 3Q, high-pressure water inlet cavity.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present application, a specific embodiment of the present application will be described with reference to the accompanying drawings, but the scope of the present application is not limited to the following description.
The thrust structure in the vertical multistage centrifugal pump plays the following roles:
is subjected to axial force: centrifugal pumps, when operated, generate axial forces, i.e. thrust forces caused by the flow of liquid. The thrust structure is able to withstand these axial forces, preventing it from adversely affecting the stability and life of the pump; balance thrust: in a vertical multistage centrifugal pump, the thrust generated in the pump tends to be unbalanced due to the action of the multistage impellers. The thrust structure can be arranged through reasonable design, so that the positive thrust and the reverse thrust of the pump are balanced, and unstable and vibration inside the pump are avoided.
A pump thrust device for balancing axial forces is shown with reference to figures 1-5.
The utility model provides a pump thrust device for balancing axial force, includes moving ring assembly 1 and locates moving ring assembly 1 below quiet ring assembly 3, moving ring assembly 1 includes thrust disk 101, moving ring rubber 102, moving seal ring 103, fixed cover 104, still is equipped with high-pressure seal structure 2 between moving ring assembly 1 and the quiet ring assembly 3, and high-pressure seal structure 2 includes:
the buoyancy regulating unit 201, the buoyancy regulating unit 201 is arranged in the inner cavity of the static ring assembly 2, and the buoyancy regulating unit 201 comprises a high-pressure water channel communicated with the high-pressure water inlet cavity 3Q; the buoyancy regulating unit 201 is a buoyancy bottom plate with a high-pressure water gap 2011, a connecting inserting ring 2012 protruding upwards is arranged near the periphery of the buoyancy regulating unit 201, and the buoyancy regulating unit 201 is matched and connected with the slot 2022 after being upwards floated by high-pressure thrust of high-pressure water.
Referring to fig. 1, the direction of the arrow in the drawing is the water flowing direction, water enters from a plurality of high-pressure water inlet channels 3D, upward thrust is applied to the buoyancy regulating unit 201 through the high-pressure water inlet cavity 3Q, meanwhile, high-pressure water is injected into the inner cavity of the sealing unit 202 through the high-pressure water port 2011, a high-pressure water area is formed in the inner cavity of the sealing unit 202, the inner cavity of the moving ring assembly 1 is a low-pressure area, a water film isolation part 203 is formed at the joint of the moving ring assembly 1 and the sealing unit 202, and on the one hand, the water film isolation part 203 performs high-pressure water area isolation to prevent water in the high-pressure water area in the inner cavity of the sealing unit 202 from flowing to the low-pressure area in the inner cavity of the moving ring assembly 1. Meanwhile, the function of protecting the bearing, reducing leakage and adjusting axial force is achieved in the vertical multistage centrifugal pump through the water film.
According to the application, the high-pressure sealing structure 2 is newly added in the optimal design, the buoyancy regulating and controlling unit 201 is matched with the static ring assembly 3, and the high-pressure water area in the static ring assembly 3 is used for giving upward thrust to the buoyancy regulating and controlling unit 201, so that the high-pressure sealing structure 2 is stably connected with the movable ring assembly 1, the problem that the axial force balancing device cannot continuously and normally finish work due to the fact that the movable ring assembly 1 and the static ring assembly 3 are worn is avoided, and the problem that the sealing performance between the movable ring assembly and the static ring assembly is reduced in long-term use is solved.
The stationary ring assembly 3 comprises an upper sealing part 3a and a lower sealing base 3b, the upper sealing part 3a and the lower sealing base 3b are assembled to form a plurality of high-pressure water inlet channels 3D and high-pressure water inlet cavities 3Q, the high-pressure water inlet channels 3D are connected with the high-pressure water inlet cavities 3Q, the high-pressure sealing structure 2 is connected in the inner cavity of the upper sealing part 3a, and the high-pressure sealing structure 2 can move up and down relative to the inner cavity of the upper sealing part 3 a.
The sealing unit 202, the sealing unit 202 comprises a high pressure cavity 2021, the bottom of the high pressure cavity 2021 is connected with the buoyancy regulating unit 201, and the top of the high pressure cavity 2021 is provided with a water film isolation part 203 connected with the movable ring assembly 1.
The application solves the problem of reduced tightness between the movable ring assembly 1 and the static ring assembly 3 caused by friction pairs between the movable ring assembly 1 and the static ring assembly 3 for a long time in optimizing the concrete structure of the movable ring assembly 1 and the static ring assembly 3 and the matching relation between the movable ring assembly 1 and the static ring assembly 3, protects the vertical multistage centrifugal pump, balances axial force under the assistance of a pump thrust device, and has longer service life.
The upper end of the inner cavity of the upper sealing part 3a is provided with a supporting groove 3a1 which is recessed downwards, the supporting groove 3a1 is provided with a middle rotation stopping pin 3a2, the sealing unit 202 is provided with a static sealing ring 2023 which is connected with the supporting groove 3a1 in a matched mode in an outward protruding mode, and the static sealing ring 2023 is provided with a stop recess 2024 which is recessed inwards and matched with the middle rotation stopping pin 3a2 in a stop mode. Through the cooperation connection of middle part end rotating round pin 3a2 and end position concave recess 2024, carry out spacingly to sealing unit 202, prevent that vertical multistage centrifugal pump from following the rotation with the moving ring subassembly 1 that the motor shaft is connected when the during operation, drive the high-pressure seal structure 2 that is connected with moving ring subassembly 1 and follow the rotation, keep relatively static between high-pressure seal structure 2 and the quiet ring subassembly 3.
The connection part of the sealing unit 202 and the movable ring assembly 1 is provided with a multi-stage pressure regulating part 2025, the multi-stage pressure regulating part 2025 comprises a primary pressure reducing groove 2025a and a final pressure reducing groove 2025b which are mutually connected from bottom to top, the primary pressure reducing groove 2025a forms a primary pressure reducing channel, and the final pressure reducing groove 2025b forms a final pressure reducing channel.
Because the water area of the multi-stage pressure regulating part 2025 is a high-pressure area, the area of the movable sealing ring 103 is a low-pressure area, and a water film can be formed between the multi-stage pressure regulating part 2025 and the movable sealing ring 103, the protection of the bearing, the reduction of leakage and the adjustment of axial force are realized through the following modes:
and (3) protecting a bearing: the water film in the thrust structure forms a protective layer in front of the bearing, blocking liquid in the high pressure region from entering the bearing region. Thus, the direct impact and infiltration of the liquid to the bearing can be prevented, and the abrasion and damage of the bearing are reduced. The existence of the water film can play a certain role in cooling, reduce the temperature of the bearing and prolong the service life of the bearing.
Leakage reduction: the water film in the thrust structure forms a sealing layer, so that leakage of liquid from a high-pressure area to a low-pressure area can be effectively reduced. The water film forms a barrier for blocking the leakage of the high-pressure liquid, and avoids the waste of energy and environmental pollution. Meanwhile, leakage can be further reduced and the efficiency and performance of the pump can be improved by controlling the thickness and pressure of the water film.
Adjusting the axial force: the water film in the thrust structure can adjust the axial force by adjusting the thickness and the pressure of the water film. By increasing or decreasing the thickness and pressure of the water film, the force of the liquid on the thrust structure can be varied, thereby adjusting the axial force of the pump. Therefore, the pump can maintain stable axial force under different working conditions, and the adverse effect of excessive or insufficient axial force on the performance and service life of the pump is avoided.
In summary, the water film in the structure plays roles of protecting the bearing, reducing leakage and adjusting axial force in the vertical multistage centrifugal pump. The liquid in the high-pressure area is prevented from flowing to the low-pressure area, the bearing can be protected, the leakage is reduced, the axial force is regulated, and extra special protection and regulation effects are provided for the normal operation and performance of the centrifugal pump; the protective layer and the sealing layer are formed through the water film, so that the impact and leakage of liquid to the bearing are effectively prevented, and meanwhile, the reasonable adjustment of the axial force is realized through adjusting the thickness and the pressure of the water film. These measures all help to improve the performance, stability and life of the pump.
The primary depressurization channel has an inner diameter smaller than the inner diameter of the final depressurization channel.
The inner diameter of the final-stage depressurization passage is larger than the inner diameter of the junction of the movable seal ring 103 and the multistage pressure regulating portion 2025.
By designing the primary depressurization channel and the final depressurization channel to have a non-uniform inner diameter when
Referring to fig. 5, a portion of the movable seal ring 103 extending out of the top of the multi-stage pressure regulating portion 2025 at the junction with the multi-stage pressure regulating portion 2025 is provided with protruding or recessed guide vanes 1031 toward the multi-stage pressure regulating portion 2025.
The vanes 1031 are rotationally drawn toward the central axis of the sealing unit 202.
The part of the connection part of the movable sealing ring 103 and the multistage pressure regulating part 2025, which extends out of the top of the multistage pressure regulating part 2025, is provided with protruding or recessed guide vanes 1031 towards the multistage pressure regulating part 2025, and when two water areas with different pressures are contacted, the liquid is guided to flow through the guide vanes 1031 structure and forms a stable water film. And the inclination of the specific guide vane is designed according to specific production conditions so as to be suitable for different production requirements and generate water films with different thicknesses.
The foregoing disclosure is merely illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the claims herein, as equivalent changes to the claims herein fall within the scope of the application.
Claims (9)
1. Pump thrust device for balancing axial force, including moving ring subassembly (1) and locate moving ring subassembly (3) of moving ring subassembly (1) below, moving ring subassembly (1) include thrust disc (101), moving ring rubber circle (102), moving seal ring (103), fixed cover (104), characterized in that, moving ring subassembly (1) with still be equipped with high-pressure seal structure (2) between moving ring subassembly (3), high-pressure seal structure (2) include:
the buoyancy regulating unit (201) is arranged in the inner cavity of the static ring assembly (2), and the buoyancy regulating unit (201) comprises a high-pressure water channel communicated with the high-pressure water inlet cavity (3Q);
the sealing unit (202), the sealing unit (202) comprises a high-pressure cavity (2021), the bottom of the high-pressure cavity (2021) is connected with the buoyancy regulating unit (201), and a water film isolation part (203) connected with the movable ring assembly (1) is arranged at the top of the high-pressure cavity (2021).
2. The pump thrust device for balancing axial force according to claim 1, wherein the buoyancy control unit (201) is a buoyancy bottom plate with the high-pressure water gap (2011), an upward protruding connecting insertion ring (2012) is arranged near the periphery of the buoyancy control unit (201), and the buoyancy control unit (201) is cooperatively connected with the slot (2022) after being floated upwards by high-pressure thrust of high-pressure water.
3. A pump thrust device for balancing axial forces according to claim 2, characterized in that the stationary ring assembly (3) comprises an upper sealing part (3 a) and a lower sealing base (3 b), the upper sealing part (3 a) and the lower sealing base (3 b) are assembled to form a plurality of high pressure water inlet channels (3D) and the high pressure water inlet cavity (3Q), a plurality of the high pressure water inlet channels (3D) are connected with the high pressure water inlet cavity (3Q), the high pressure sealing structure (2) is connected in the inner cavity of the upper sealing part (3 a), and the high pressure sealing structure (2) can move up and down relative to the inner cavity of the upper sealing part (3 a).
4. A pump thrust device for balancing axial forces according to claim 3, characterized in that the upper end of the inner cavity of the upper sealing part (3 a) is provided with a supporting groove (3 a 1) recessed downwards, the supporting groove (3 a 1) is provided with a middle rotation stopping pin (3 a 2), the sealing unit (202) is provided with a static sealing ring (2023) protruding outwards and being connected with the supporting groove (3 a 1) in a matched manner, and the static sealing ring (2023) is provided with a stop recess (2024) recessed inwards and matched with the middle rotation stopping pin (3 a 2) in a matched manner.
5. Pump thrust device for balancing axial forces according to claim 1 or 4, characterized in that the connection of the sealing unit (202) with the moving ring assembly (1) is provided with a multi-stage pressure regulating portion (2025), the multi-stage pressure regulating portion (2025) comprising a primary depressurization groove (2025 a) and a final depressurization groove (2025 b) connected to each other from bottom to top, the primary depressurization groove (2025 a) forming a primary depressurization channel, the final depressurization groove (2025 b) forming a final depressurization channel.
6. A pump thrust device for balancing axial forces according to claim 5, wherein the inner diameter of the primary depressurization passage is smaller than the inner diameter of the final depressurization passage.
7. A pump thrust device for balancing axial forces according to claim 6, characterized in that the inner diameter of the final pressure reducing channel is larger than the inner diameter of the connection of the dynamic sealing ring (103) and the multistage pressure regulating portion (2025).
8. Pump thrust device for balancing axial forces according to claim 7, characterized in that the part of the movable sealing ring (103) that protrudes beyond the top of the multi-stage pressure regulating part (2025) at the connection with the multi-stage pressure regulating part (2025) is provided with protruding or recessed guide vanes (1031) towards the multi-stage pressure regulating part (2025).
9. The pump thrust device for balancing axial forces according to claim 8, wherein the vanes (1031) are rotationally folded towards the central axis of the sealing unit (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311153033.5A CN117028265A (en) | 2023-09-07 | 2023-09-07 | Pump thrust device for balancing axial force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311153033.5A CN117028265A (en) | 2023-09-07 | 2023-09-07 | Pump thrust device for balancing axial force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117028265A true CN117028265A (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311153033.5A Pending CN117028265A (en) | 2023-09-07 | 2023-09-07 | Pump thrust device for balancing axial force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117028265A (en) |
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2023
- 2023-09-07 CN CN202311153033.5A patent/CN117028265A/en active Pending
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