CN211599103U

CN211599103U - Circulating cooling pump

Info

Publication number: CN211599103U
Application number: CN202020116198.0U
Authority: CN
Inventors: 雷和波; 方远西; 黄新民; 聂龙
Original assignee: Jiangxi Jinghao Salt Chemical Co ltd
Current assignee: Jiangxi Jinghao Salt Chemical Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-09-29
Anticipated expiration: 2030-01-17

Abstract

The utility model discloses a circulating cooling pump, which comprises a pump shell, a base, a main shaft, a liquid acting component, a return pipeline, a mechanical sealing structure, a bearing and a bearing cover; a backflow pipeline used for guiding liquid at the water outlet of the pump shell back into the mechanical sealing structure is arranged between the mechanical sealing structure and the water outlet of the pump shell, a pipeline is connected to the cooling water inlet of the mechanical sealing structure at the water outlet of the pump body, the working liquid in the pump body is guided back into the mechanical sealing structure for cooling the mechanical sealing structure, the liquid entering the mechanical sealing structure can flow into a working liquid area of the pump body from a gap between the pump shell and a shaft, the whole cooling liquid can circulate, the cooling effect is improved, the working liquid is adopted as the cooling liquid, the phenomenon that the quality of the working liquid is changed due to the fact that the cooling liquid leaks into the working liquid can be avoided, the problem of adverse effect caused by the fact that the cooling liquid leaks into the working liquid is solved while the cooling effect is improved, and the production quality is improved.

Description

Circulating cooling pump

Technical Field

The utility model relates to a pump body field especially relates to a circulative cooling pump.

Background

The pump is used as a machine for conveying liquid or increasing pressure of fluid, is widely applied to various industries, the mechanical seal is generally used as a conventional sealing device in a pump body, the temperature of a component in the mechanical seal, which is in contact with a shaft, is rapidly increased due to the friction of the shaft during the use of the mechanical seal as a shaft sealing device of a rotary machine, and the performance of the mechanical seal is easily damaged due to continuous friction and temperature increase, so that the temperature of the mechanical seal in the work is reduced by introducing cooling liquid into the mechanical seal in a liquid cooling mode in the prior art, the service life of the mechanical seal is prolonged, but the cooling liquid is required to be cooled in the mechanical seal, so that the cooling liquid cannot be prevented from leaking to a rotation work-doing area of the pump body and is mixed with the working liquid, even if the cooling liquid does not react with the working liquid in the pump body, under the condition that the concentration of the working liquid in the pump body has an accurate requirement, the concentration of the working fluid can be changed due to the leakage of the cooling fluid, so that the concentration of the fluid passing through the pump body does not reach the standard, and the production quality is affected.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that is arranged in the prior art that the cooling water that is used for cooling mechanical seal influences the working solution in the pump body after leaking, the utility model aims to solve the problem that a circulative cooling pump is proposed for both can reach cooling mechanical seal's effect, can solve the coolant liquid again and leak the bad consequence that brings in the working solution, thereby make the liquid quality after the pump body effect unchangeable, improve production quality.

To achieve the purpose, the utility model adopts the following technical proposal:

a circulating cooling pump comprises a pump shell, a base, a main shaft, a component for applying work to liquid, a backflow pipeline, a mechanical sealing structure, a bearing and a bearing cover;

the pump shell is arranged on the base, the main shaft used for transmitting power to the liquid working component is arranged in the pump shell, the liquid working component, the mechanical sealing structure and the bearing are sequentially arranged on the main shaft, the bearing cover used for fastening the bearing is arranged on the pump shell outside the bearing, the inner side of the bearing is connected with the pump shell, and the backflow pipeline used for guiding liquid at the water outlet of the pump shell back into the mechanical sealing structure is arranged between the mechanical sealing structure and the water outlet of the pump shell.

Preferably, the mechanical sealing structure comprises a spring, a movable ring, a static ring and a mechanical sealing cover;

the spring, the movable ring and the static ring are sequentially sleeved on the main shaft, one end, close to the liquid acting component, of the spring is connected with the pump shell, the other end of the spring is connected with the movable ring, the other end of the movable ring is matched with the static ring, the other end of the static ring is provided with the mechanical seal cover used for abutting against the static ring, and the mechanical seal cover is connected with the pump shell through threads.

Preferably, the movable ring is a metal ring with good thermal conductivity, the outer ring radius of the movable ring is equal to the outer ring radius of the stationary ring, and the inner ring radius of the movable ring is 1.1-1.3 times of the inner ring radius of the stationary ring.

Preferably, the return conduit is a flexible conduit.

Preferably, the pair of liquid working components is an impeller or a gear set.

The utility model has the advantages that:

the utility model provides a pair of circulative cooling pump, coolant water import department through connecting a pipeline to mechanical seal in the delivery port department of the pump body, be used for cooling mechanical seal in leading back mechanical seal with the working solution in the pump body, and the liquid that gets into mechanical seal can follow the working solution region that the clearance between pump case and the axle flowed into the pump body again, make whole coolant liquid can circulate, improve the cooling effect, and because what the coolant liquid adopted is the working solution, thereby can avoid leading to the working solution quality to change because the coolant liquid leaks, thereby solved the problem of the harmful effects that brings in coolant liquid leaks to the working solution again when improving the cooling effect, and the production quality is improved.

Drawings

FIG. 1 is a schematic view of a recirculating cooling pump;

in the figure:

1. a pump housing; 2. a base; 3. a main shaft; 4. a mechanical seal structure; 41. a spring; 42. a moving ring; 43. a stationary ring; 44. a mechanical seal gland; 8. a bearing; 9. a bearing cap; 10. a water inlet; 11. a water outlet; 12. a component for applying work to the liquid; 13. and (4) a return pipeline.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, the circulation cooling pump provided in this embodiment includes a pump casing 1, a base 2, a main shaft 3, a working component 12 for liquid, a return pipe 13, a mechanical seal structure 4, a bearing 8, and a bearing cover 9; the pump case 1 is arranged on the base 2, a main shaft 3 used for transmitting power to the liquid acting part 12 is arranged in the pump case 1, the liquid acting part 12, the mechanical sealing structure 4 and the bearing 8 are sequentially arranged on the main shaft 3, a bearing cover 9 used for fastening the bearing 8 is arranged on the pump case 1 on the outer side of the bearing 8, the inner side of the bearing 8 is connected with the pump case 1, a backflow pipeline 13 used for draining liquid at the water outlet 11 of the pump case 1 back into the mechanical sealing structure 4 is arranged between the mechanical sealing structure 4 and the water outlet 11 of the pump case 1, one end of the backflow pipeline 13 is communicated with a through hole at a flange plate of the water outlet 11 of the pump case 1, and the other end of the backflow pipeline 13 is communicated with a through hole on the pump case 1 of a cavity where the spring. The working solution in the pump body in the embodiment is caustic soda solution, and the specific principle is as follows: when the pump body works, the caustic soda solution in the pump body is sucked by the liquid working component from the water inlet 10 and then discharged from the water outlet 11, the backflow pipeline 13 connected to the shell wall of the water outlet 11 can introduce the caustic soda solution in the pump body into the mechanical sealing structure 4 for cooling, the caustic soda solution entering the mechanical sealing structure 4 can flow into the area where the liquid working component is located in the pump body again through the gap between the main shaft 3 and the pump shell 1, and is discharged from the water outlet 11 again under the action of the liquid working component or returns to the mechanical sealing structure 4 through the backflow pipeline 13 for cooling the mechanical sealing structure 4, and the temperature of the cooling liquid is far lower than that of a component which has a sealing effect in the mechanical sealing structure 4 and rubs with the main shaft 3, so that the cooling liquid can cool the component which has the sealing effect in the mechanical sealing structure 4. The action of whole cooling mechanical seal structure 4 is the circulative cooling process, cool off through adopting endless coolant liquid to mechanical seal structure 4, improve the cooling effect of the pump body, prevent that mechanical seal structure 4 from leading to the condition that mechanical seal structure 4 became invalid after continuous work because of rising with main shaft 3 friction temperature after appearing, and because the coolant liquid is the working solution (caustic soda solution) in the pump body, thereby can not lead to the quality of working solution (caustic soda solution) to change to the regional the quality of liquid acting part of the pump body because of the leakage of cooling water, thereby improve the quality of production.

Further, the mechanical sealing structure 4 comprises a spring 41, a movable ring 42, a stationary ring 43 and a mechanical sealing cover 44; the main shaft 3 is sleeved with a spring 41, a movable ring 42 and a stationary ring 43 in sequence, one end of the spring 41 close to the liquid acting component 12 is connected with the pump shell 1, the other end of the spring 41 is connected with the movable ring 42, the other end of the movable ring 42 is matched with the stationary ring 43, the other end of the stationary ring 43 is provided with a mechanical seal cover 44 for abutting against the stationary ring 43, and the mechanical seal cover 44 is connected with the pump shell 1 through threads. The quiet ring 43 in the mechanical seal structure 4 in this embodiment sets up at the end that is close to bearing 8, for unilateral sealed mechanical seal structure 4, wherein spring 41 is used for giving the certain elasticity of rotating ring 42 for rotating ring 42 can compress tightly quiet ring 43, lets quiet ring 43 be inseparabler in main shaft 3, thereby machine gland 44 can adjust the precession volume of self and adjust the pressure that quiet ring 43 received, thereby adjust the sealed effect of quiet ring 43.

In order to improve the cooling effect of the coolant on the mechanical seal, the rotating ring 42 is a metal ring with good thermal conductivity, the outer ring radius of the rotating ring 42 is equal to the outer ring radius of the stationary ring 43, and the inner ring radius of the rotating ring 42 is 1.1 to 1.3 times the inner ring radius of the stationary ring 43. Furthermore, the movable ring 42 can be made of copper, iron and other metals, and the movable ring 42 with good thermal conductivity can enable the static ring 43 to rapidly transfer heat generated by friction to the movable ring 42, and then the movable ring 42 transfers the heat to the cooling liquid, so that the static ring 43 achieves the effect of rapid heat dissipation. The inner ring radius of the movable ring 42 is set to be 1.1-1.3 times of the inner ring radius of the static ring 43, so that the movable ring 42 can compress the static ring 43 and the static ring 43 is not deformed and failed, and the cooling liquid can directly contact with the static ring 43 through the gap between the movable ring 42 and the main shaft 3, so that the heat dissipation rate of the static ring 43 is increased, and the cooling effect is improved.

In order to guide the working fluid at the water outlet 11 back to the mechanical sealing structure 4, further, the return pipeline 13 is a flexible pipeline. The concrete material of flexible pipeline can adopt plastics or corrosion-resistant metal (such as stainless steel, copper), because flexible pipeline is softer, can bend, so more convenient in the installation to have good corrosion resistance, so can improve the patency of the coolant liquid in the work, and more durable.

Further, the liquid work member 12 is an impeller or a gear set. The scheme in the embodiment is suitable for the impeller pump or the gear pump, and the appearance of the pump body and the shape of the liquid working component can be changed according to specific working requirements, so that the pump body is suitable for various production requirements.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A recirculating cooling pump, comprising:

the device comprises a pump shell (1), a base (2), a main shaft (3), a liquid acting component (12), a backflow pipeline (13), a mechanical sealing structure (4), a bearing (8) and a bearing cover (9);

the pump shell (1) is arranged on the base (2), the main shaft (3) used for transmitting power to the liquid working component (12) is arranged in the pump shell (1), the liquid working component (12), the mechanical sealing structure (4) and the bearing (8) are sequentially arranged on the main shaft (3), the bearing cover (9) used for fastening the bearing (8) is arranged on the pump shell (1) on the outer side of the bearing (8), the inner side of the bearing (8) is connected with the pump shell (1), and the backflow pipeline (13) used for draining liquid at the water outlet (11) of the pump shell (1) into the mechanical sealing structure (4) is arranged between the mechanical sealing structure (4) and the water outlet (11) of the pump shell (1).

2. A recirculating cooling pump as set forth in claim 1, wherein:

the mechanical sealing structure (4) comprises a spring (41), a movable ring (42), a static ring (43) and a mechanical sealing cover (44);

the pump comprises a main shaft (3), a spring (41), a movable ring (42) and a static ring (43) which are sequentially sleeved on the main shaft (3), wherein one end, close to a liquid working component (12), of the spring (41) is connected with the pump shell (1), the other end of the spring (41) is connected with the movable ring (42), the other end of the movable ring (42) is matched with the static ring (43), the other end of the static ring (43) is provided with a mechanical seal cover (44) used for abutting against the static ring (43), and the mechanical seal cover (44) is connected with the pump shell (1) through threads.

3. A recirculating cooling pump as set forth in claim 2, wherein:

the movable ring (42) is a metal ring with good heat conductivity, the outer ring radius of the movable ring (42) is equal to that of the static ring (43), and the inner ring radius of the movable ring (42) is 1.1-1.3 times that of the static ring (43).

4. A recirculating cooling pump as set forth in claim 2, wherein:

the return pipeline (13) is a flexible pipeline.

5. A recirculating cooling pump as set forth in claim 1, wherein:

the pair of liquid working components (12) is an impeller or a gear set.