Centrifugal pump mechanical seal cooling circulation system

Abstract

The utility model discloses a centrifugal pump mechanical seal cooling circulation system which comprises a pump body, a cooler and a water storage tank, a cooling circulation impeller is arranged at the position of a mechanical seal in the pump body, the cooling circulation impeller is fixed on a shaft in the pump body, a closed cavity is arranged in the pump body where the cooling circulation impeller is located, and the water storage tank is arranged in the closed cavity. A water inlet and a water outlet are formed in the upper and lower parts of the pump body where the cooling circulating impeller is located; the water inlet is connected to the cooler, the water outlet is connected to the water storage tank, and the water storage tank is connected with the cooler. The cooling circulation system is simple in structure, can be started and stopped automatically, is controlled through starting and stopping of the pump, is stable in circulation, does not need to be additionally provided with a circulating pump or other power devices, is economical and environment-friendly, and does not need tedious control; and the closed cavity is formed in the position where the mechanical seal is located, circulating cooling liquid circulates in the closed cavity when the pump is started, the closed state in the closed cavity is recovered when the pump is stopped, and impurities cannot be introduced to affect the service life of the pump body.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling, in particular to a centrifugal pump mechanical seal cooling circulation system. Background Art

[0002] The cooling device is a device that can lower the temperature of the equipment during use. It discharges the heat generated by the equipment through air cooling or water cooling, thereby ensuring the normal operation of the equipment. The centrifugal pump seal is a device that solves the sealing problem between the rotating shaft and the body. It is a device to prevent fluid leakage and plays a sealing role in the centrifugal pump. The centrifugal pump seal will generate heat due to friction during use. In order to ensure the sealing effect, a cooling device is usually used to cool it down.

[0003] Usually, the temperature is reduced by water cooling or air cooling. At present, water cooling uses circulating coolant to continuously supply water through a pump for cooling, and air cooling uses cold air to cool. The machine seal is usually protected inside by a casing. Water cooling requires the start and stop of the water cooling circulation pump to be controlled according to the start and stop of the pump, which is more troublesome. Air cooling requires the setting of vents. If no air inlet and outlet are set, the air cooling effect cannot be achieved. Setting vents may introduce impurities and shorten the service life of the pump.

[0004] Currently, there is a multi-pump mechanical seal cooling circulation system with a publication number of CN 208669570 U, which includes a circulating coolant pump, a pipeline, a material pump, a coolant storage tank, a coolant flow meter and a pressure gauge. The circulating coolant pump draws coolant from the coolant storage tank into the pipeline to adjust the flow, so that the coolant circulates in the pipeline and monitors the pipeline flow and pressure. The pump and mechanical seal cooling system is connected. The mechanical seal coolant is cooled by the heat exchanger after heat exchange and discharged into the coolant tank, and then recycled. Although the system can cool the pump mechanical seal, the system needs to be started all the time. As long as any pump is working, the system needs to be started all the time, which cannot effectively save energy. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a centrifugal pump mechanical seal cooling circulation system.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A centrifugal pump mechanical seal cooling circulation system, comprising a pump body, a cooler and a water storage tank, wherein a pump cover is arranged on the pump body, a pump impeller is arranged inside the pump body, the pump impeller is connected to a shaft, the shaft is connected to a motor, an mechanical seal is arranged between the shaft and the pump impeller, a suspension bearing component is arranged outside the shaft, and a closed cavity is formed between the suspension bearing component and the shaft;

[0008] A cooling circulation impeller is arranged at the position where the mechanical seal is located in the pump body, and the cooling circulation impeller is fixed on the shaft. A water inlet and a water outlet are arranged at the upper and lower parts of the closed cavity where the cooling circulation impeller is located; the water inlet is connected to the cooler, and the water outlet is connected to the water storage tank, and the water storage tank is connected to the cooler.

[0009] A cooling circulation impeller is arranged on the shaft at the rear side of the mechanical seal, and a water inlet and a water outlet are arranged on the upper and lower suspension bearing components of the cavity where the cooling circulation impeller is located.

[0010] The suspension bearing component comprises a bearing frame and a sealing shell, and the sealing shell is fixed on the pump cover.

[0011] The water inlet is arranged on the front side of the cooling circulation impeller, and the water outlet is arranged on the rear side of the cooling circulation impeller. The rotation of the cooling circulation impeller will generate a certain suction force in the closed cavity, so that the coolant is sucked into the closed cavity where the cooling circulation impeller is located through the water inlet, and the mechanical seal is cooled. The cooled water is then discharged through the water outlet.

[0012] The water inlet is connected to the cooler by a pipeline, and a self-operated micro-pressure regulating valve is provided on the pipeline at the water inlet. When the pump is started, the cooling circulation impeller will also rotate accordingly. The suction force generated by the rotation will cause the self-operated micro-pressure regulating valve to actively open and suck in coolant for cooling.

[0013] The water outlet is connected to the water storage tank by a pipe, and a duckbill valve is provided on the pipe where the water outlet is located. When the pump is started, the cooling circulation impeller will also rotate accordingly, and the sucked coolant will be discharged through the water outlet. When the coolant is discharged, the duckbill valve will automatically open to drain. When the pump stops, the cooling circulation impeller will also stop accordingly, stopping the suction and discharge of the coolant, restoring the balance in the closed cavity, and the self-operated micro-pressure regulating valve and the duckbill valve will automatically close.

[0014] The water storage tank is provided with a water replenishment pipeline, on which a valve is provided, and when the circulating liquid in the water storage tank is insufficient, it is replenished through the water replenishment pipeline.

[0015] The beneficial effects of the utility model are: simple structure, automatic start and stop, cooling circulation system is controlled by the start and stop of the pump, stable circulation, no additional circulation pump or other power device is required, economical and environmentally friendly, and no complicated control is required; and a closed cavity is formed at the position where the mechanical seal is located, and the coolant circulates in the closed cavity when the pump is started, and the closed state is restored in the closed cavity when the pump stops, and impurities will not be introduced to affect the service life of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the pump body structure of the utility model;

[0017] Figure 2 It is the system connection diagram of the utility model;

[0018] In the figure: 1. Pump body; 2. Pump cover; 3. Pump impeller; 4. Shaft; 5. Machine seal; 6. Suspension bearing components; 7. Cooling circulation impeller; 8. Water outlet; 9. Water inlet; 10. Self-operated micro-pressure regulating valve; 11. Cooler; 12. Water storage tank; 13. Duckbill valve; 14. Water supply pipeline. DETAILED DESCRIPTION

[0019] Example 1

[0020] like Figure 1-2 As shown, the utility model provides a centrifugal pump mechanical seal cooling circulation system, which has the following structure: comprising a pump body 1, a cooler 11 and a water storage tank 12, a pump cover 2 is arranged on the pump body 1, a pump impeller 3 is arranged inside the pump body 1, the pump impeller 3 is connected to a shaft 4, the shaft 4 is connected to a motor, an organic seal 5 is arranged at the sealing position between the shaft 4 and the pump impeller 3, a suspension bearing component 6 is arranged on the outer side of the shaft 4, and a closed cavity is formed between the suspension bearing component 6 and the shaft 4; a cooling circulation impeller 7 is arranged at the position where the mechanical seal 5 is located in the pump body 1, the cooling circulation impeller 7 is fixed on the shaft 4 in the pump body 1, and a water inlet 9 and a water outlet 8 are arranged on the suspension bearing component 6 above and below the closed cavity where the cooling circulation impeller 7 is located; the water inlet 9 is connected to the cooler 11, the water outlet 8 is connected to the water storage tank 12, and the water storage tank 12 is connected to the cooler 11;

[0021] The suspension bearing component 6 includes a bearing frame and a sealing shell, and the sealing shell is fixed on the pump cover 2;

[0022] The water inlet 9 is arranged at the bottom of the front sealing shell of the cooling circulation impeller 7, and the water outlet 8 is arranged at the top of the rear sealing shell of the cooling circulation impeller 7; the water inlet 9 is connected to the cooler 11 through a pipeline, and a self-operated micro-pressure regulating valve 10 is arranged on the pipeline at the water inlet 9, and the water outlet 8 is connected to the water storage tank 12 through a pipeline, and a duckbill valve 13 is arranged on the pipeline where the water outlet 8 is located, and a water supply pipeline 14 is arranged on the water storage tank 12, and a valve is arranged on the water supply pipeline 14;

[0023] Specifically, when the pump is started, the cooling circulation impeller 7 will also rotate and generate a certain suction force in the closed cavity. The suction force generated by the rotation will cause the self-operated micro-pressure regulating valve 10 to open actively, so that the coolant is sucked into the closed cavity where the cooling circulation impeller 7 is located through the water inlet 9, and the mechanical seal 5 is cooled and the cooled water is discharged through the water outlet 8; when the coolant is discharged, the duckbill valve 13 automatically opens to drain water, and when the pump stops, the cooling circulation impeller 7 will also stop, stopping the suction and discharge of the coolant, and the balance in the closed cavity is restored, and the self-operated micro-pressure regulating valve 10 and the duckbill valve 13 are automatically closed; when the circulating liquid in the water storage tank 12 is insufficient, it is replenished through the water supply pipeline 14.

Claims

1. A centrifugal pump mechanical seal cooling circulation system, comprising a pump body, a cooler and a water storage tank, wherein a pump cover is arranged on the pump body, a pump impeller is arranged inside the pump body, the pump impeller is connected to a shaft, the shaft is connected to a motor, an mechanical seal is arranged between the shaft and the pump impeller, a suspension bearing component is arranged outside the shaft, and a closed cavity is formed between the suspension bearing component and the shaft, characterized in that: A cooling circulation impeller is arranged at the position where the mechanical seal is located in the pump body, and the cooling circulation impeller is fixed on the shaft. A water inlet and a water outlet are arranged at the upper and lower parts of the closed cavity where the cooling circulation impeller is located; the water inlet is connected to the cooler, and the water outlet is connected to the water storage tank, and the water storage tank is connected to the cooler.

2. A centrifugal pump seal cooling circulation system according to claim 1, characterized in that: The suspension bearing component comprises a bearing frame and a sealing shell, and the sealing shell is fixed on the pump cover.

3. A centrifugal pump seal cooling circulation system according to claim 1, characterized in that: The water inlet is arranged at the front side of the cooling circulation impeller, and the water outlet is arranged at the rear side of the cooling circulation impeller.

4. A centrifugal pump seal cooling circulation system according to claim 1, characterized in that: The water inlet is connected to the cooler through a pipeline, and a self-operated micro-pressure regulating valve is arranged on the pipeline at the water inlet.

5. A centrifugal pump seal cooling circulation system according to claim 1, characterized in that: The water outlet is connected to the water storage tank via a pipeline, and a duckbill valve is arranged on the pipeline where the water outlet is located.

6. A centrifugal pump seal cooling circulation system according to claim 1, characterized in that: The water storage tank is provided with a water supply pipeline, and a valve is provided on the water supply pipeline.

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