CN210484099U

CN210484099U - Centrifugal pump structure with machine seals from lubricating function

Info

Publication number: CN210484099U
Application number: CN201921463784.6U
Authority: CN
Inventors: 李佰霖
Original assignee: Yingruopai Shanghai Fluid Technology Co Ltd
Current assignee: Yingruopai Shanghai Fluid Technology Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-05-08
Anticipated expiration: 2029-09-04

Abstract

The utility model relates to the technical field of fluid equipment, in particular to a centrifugal pump structure with a machine seal self-lubricating function, which comprises a pump body and a motor, wherein the motor is connected with the pump body; a front end mechanical seal is arranged at the joint of the shaft connecting chamber and the impeller chamber of the pump body, and a rear end mechanical seal is arranged at the joint of the shaft connecting chamber and the housing of the motor; the shaft connecting chamber is provided with a circulating water inlet and a circulating water outlet, the circulating water inlet is arranged at the lower part of the shell of the shaft connecting chamber, and the circulating water outlet is arranged at the upper part of the shell of the shaft connecting chamber; the circulating water outlet is connected with the side wall of a water storage tank through a circulating water outlet pipe, and the circulating water inlet is connected with the bottom of the water storage tank through a circulating water inlet pipe. The utility model discloses even if under the operating mode such as applicable to the field, even if under the environment that can't provide the cooling water supply that lasts, also can make the machine of centrifugal pump seal and obtain the cooling of certain degree.

Description

Centrifugal pump structure with machine seals from lubricating function

Technical Field

The utility model relates to a fluidic equipment technical field, concretely relates to centrifugal pump structure with machine seals self-lubricating function.

Background

And a mechanical sealing device is arranged at the rotating shaft of the centrifugal pump and used for isolating the extended rotating shaft from the interior of the machine body. The mechanical sealing device is a device which is formed by keeping fit and relative sliding of at least one pair of end faces perpendicular to a rotating axis under the action of fluid pressure and the elastic force of a compensating mechanism and under the matching of auxiliary sealing, thereby preventing fluid leakage, is commonly used for rotary fluid machines such as pumps, compressors, reaction stirrers and the like, and is also used for sealing gear boxes, valves, rotary joints, ship tail shafts and the like. The mechanical seal is thus a common shaft seal arrangement.

In the production and processing of fluid products, products with high temperature or products which are easy to crystallize are easy to damage the mechanical sealing device when flowing through the centrifugal pump. The general coping method is to connect continuously supplied cooling water to cool the product, so as to avoid the accelerated aging of the machine sealing piece caused by high temperature. However, if the centrifugal pump works in a use occasion without continuous cooling water supply access, such as the field and other occasions, the pump body cannot be lubricated and cooled at the mechanical seal position through cooling water, and the pump body is easy to damage after mechanical seal for long time use and then fails or even is damaged.

Therefore, a product is needed in the market to solve the problem that the pump body is kept working normally by means of cooling the mechanical sealing structure without connecting the pump body to continuous cooling water supply.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centrifugal pump structure with machine seals self-lubricating function, solve above technical problem.

The utility model provides a technical problem can adopt following technical scheme to realize:

a centrifugal pump structure with a machine seal self-lubricating function comprises a pump body and a motor, wherein the motor is connected with the pump body, a shell of the pump body is provided with a water inlet and a water outlet, and a shaft of the pump body is connected with a shaft of the motor in a cavity of a shaft connecting chamber;

a front-end mechanical seal is arranged at the joint of the shaft connecting chamber and the impeller chamber of the pump body, and a rear-end mechanical seal is arranged at the joint of the shaft connecting chamber and the housing of the motor;

the shaft connecting chamber is provided with a circulating water inlet and a circulating water outlet, the circulating water inlet is arranged at the lower part of the shell of the shaft connecting chamber, and the circulating water outlet is arranged at the upper part of the shell of the shaft connecting chamber;

the circulating water outlet is connected with the side wall of a water storage tank through a circulating water outlet pipe, and the circulating water inlet is connected with the bottom of the water storage tank through a circulating water inlet pipe.

The utility model discloses a set up the storage water tank to through circulating water import and circulating water export with the hub connection room and the storage water tank connection back of centrifugal pump, carry out the water circulation behind the water supply body in the storage water tank and realize the mechanical seal spare of counter shaft connection room and cool off, so that slow down mechanical seal spare ageing increase of service life.

The horizontal height difference between the central position of the impeller of the pump body and the bottom of the water storage tank is 500-1000 mm. Preferably, the level difference is 800 mm.

The utility model provides a storage water tank to the circulating water route between the hub connection room, its circulation power only relies on the rotation of the indoor pivot of hub connection to provide, and consequently the level of storage water tank is difficult for being higher than circulation power and provides some too big, consequently sets up and can ensure to provide comparatively suitable water circulation power 500mm ~ 1000 mm.

The junction of the circulating water inlet and the circulating water inlet pipe, and the junction of the circulating water outlet and the circulating water outlet pipe are both provided with sealing rings for sealing. Preferably, the sealing ring is made of high-temperature-resistant rubber.

The utility model discloses a set up the sealing washer that high temperature resistant rubber made, the high temperature of avoiding circulating water makes seal structure ageing too early and influence the water circulation.

And the top of the water storage tank is provided with an air hole.

The utility model discloses a set up the bleeder vent and communicate the back with the inner chamber of storage water tank and external, make inner chamber atmospheric pressure keep unanimous with the external world to the water circulation route that makes circulating water inlet tube, storage water tank, circulating water outlet pipe and hub connection room form can form the water circulation.

The lateral wall of storage water tank is equipped with the bleeder vent, the setting height of bleeder vent is higher than on the storage water tank the level of the access position of circulating water outlet pipe.

The air holes are covered with a filter screen. The filter screen is made of stainless steel.

The water storage tank is provided with a pipe clamp, so that the water storage tank can be fixed at a specific height conveniently.

Has the advantages that: due to the adoption of the technical scheme, the utility model discloses even if can be applicable to under the operating mode such as field, even if under the environment that can't provide the cooling water supply that lasts, also can make the machine of centrifugal pump seal obtain the cooling of certain degree, make its working condition that can be superior to the centrifugal pump of no cooling condition.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of FIG. 1;

fig. 3 is a side view of fig. 1.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further explained with reference to the specific drawings.

Referring to fig. 1, a centrifugal pump structure with a mechanical seal self-lubricating function comprises a pump body 10 and a motor 20, wherein the motor 20 is connected with the pump body 10, a water inlet 11 and a water outlet 12 are formed in the shell of the pump body 10, and the shaft of the pump body 10 is connected with the shaft of the motor 20 in a cavity of a shaft connecting chamber 30;

a front end mechanical seal is arranged at the joint of the shaft connecting chamber 30 and the impeller chamber of the pump body 10, and a rear end mechanical seal is arranged at the joint of the shaft connecting chamber 30 and the housing of the motor 10; the shaft connecting chamber 30 is provided with a circulating water inlet and a circulating water outlet, the circulating water inlet is arranged at the lower part of the shell of the shaft connecting chamber 30, and the circulating water outlet is arranged at the upper part of the shell of the shaft connecting chamber 30; the circulating water outlet is connected with the side wall of the water storage tank 50 through a circulating water outlet pipe 40, and the circulating water inlet is connected with the bottom of the water storage tank 50 through a circulating water inlet pipe 60.

In some embodiments, the difference between the center of the impeller of the pump body 10 and the bottom of the water storage tank 50 may be set to 500mm to 1000 mm. It should be noted that the center position of the impeller of the pump body coincides with the center position of the water inlet 11. In some preferred embodiments, the difference between the center of the impeller of the pump body 10 and the bottom of the water storage tank can be set to 800 mm. The utility model provides a storage water tank 50 to the circulating water route between the axle connecting chamber 30, its circulation power only relies on the rotation of the pivot in the axle connecting chamber 30 to provide, and consequently storage water tank 50's level can not exceed circulation power and provide a little too much, sets up and can ensure to provide comparatively suitable water circulation power 500mm ~ 1000 mm. The temperature difference between the circulating water outlet and the circulating water inlet can also contribute to circulating power.

In some embodiments, the connection between the circulating water inlet and the circulating water inlet pipe 60 and the connection between the circulating water outlet and the circulating water outlet pipe 40 are sealed by sealing rings. In some preferred embodiments, the seal ring is made of high-temperature-resistant rubber.

In some embodiments, the top of the water storage tank 50 is provided with air vents 52. After the inner cavity of the water storage tank 50 is communicated with the outside through the air holes 52, the air pressure of the inner cavity is kept consistent with the outside, so that a water circulation path formed by the circulating water inlet pipe 60, the water storage tank 50, the circulating water outlet pipe 40 and the shaft connecting chamber 30 can form water body circulation.

In some embodiments, the sidewall of the water storage tank 50 may also be provided with a vent hole (not shown), and the vent hole of the sidewall is higher than the horizontal height of the connection position of the circulating water outlet pipe 40 on the water storage tank 50.

In some embodiments, the air holes 52 are covered with a filter screen made of stainless steel.

In some embodiments, a pipe clamp 51 may be further disposed on the water storage tank 50 to facilitate fixing the water storage tank 50 at a specific height.

In some embodiments, the bottom of the housing of the motor 20 may be provided with a foot pad 70 to facilitate the stable placement of the product, and the bottom surface of the foot pad 70 may be covered with a cushion layer made of rubber or other flexible materials to achieve a buffering effect.

The utility model discloses a set up the storage water tank, and through circulating water import and circulating water export with the hub connection room of centrifugal pump with the storage water tank connection back, carry out the coolant liquid circulation after supplying the coolant liquid through the storage water tank and realize the mechanical seal of counter shaft connection room and cool off, so that it is ageing to slow down mechanical seal, increase of service life, it is required to explain, in the application, the coolant liquid is not restricted to the cooling water, can adopt working medium such as cooling oil to participate in cooling cycle, so that correspond the production operating mode of difference and the characteristic of the transportation material that this operating mode corresponds, for example, can adopt vegetable oil as the coolant liquid, lubricate the knot component in the refrigerated.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A centrifugal pump structure with a mechanical seal self-lubricating function comprises a pump body and a motor, wherein the motor is connected with the pump body, and a shell of the pump body is provided with a water inlet and a water outlet;

2. The centrifugal pump structure with the mechanical seal self-lubricating function as claimed in claim 1, wherein the horizontal height difference between the central position of the impeller of the pump body and the bottom of the water storage tank is 500-1000 mm.

3. A centrifugal pump structure with self-lubricating function of mechanical seal according to claim 2, characterized in that the horizontal height difference is 800 mm.

4. The centrifugal pump structure with the mechanical seal self-lubricating function according to claim 1, wherein sealing rings are arranged at the connection part of the circulating water inlet and the circulating water inlet pipe and the connection part of the circulating water outlet and the circulating water outlet pipe for sealing.

5. A centrifugal pump structure with self-lubricating function of mechanical seal according to claim 4, characterized in that the seal ring is made of high temperature resistant rubber.

6. The centrifugal pump structure with self-lubricating function of mechanical seal of claim 1, wherein the top of the water storage tank is provided with air holes.

7. The centrifugal pump structure with self-lubricating function of mechanical seal of claim 1, wherein the sidewall of the water storage tank is provided with air holes, and the height of the air holes is higher than the level of the access position of the circulating water outlet pipe on the water storage tank.

8. A centrifugal pump structure with self-lubricating function of mechanical seal according to claim 6 or 7, characterized in that the breather hole is covered with a filter screen.

9. A centrifugal pump structure with self-lubricating function of mechanical seal according to claim 8, characterized in that the filter screen is made of stainless steel.

10. The centrifugal pump structure with the mechanical seal self-lubricating function as claimed in claim 1, wherein a pipe clamp is arranged on the water storage tank.