CN212838422U

CN212838422U - Vacuum pump is used in thermos flask courage production

Info

Publication number: CN212838422U
Application number: CN202020908743.XU
Authority: CN
Inventors: 虞正和
Original assignee: Kunshan Shenglaisi Household Products Co ltd
Current assignee: Kunshan Shenglaisi Household Products Co ltd
Priority date: 2019-10-31
Filing date: 2020-05-26
Publication date: 2021-03-30
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a vacuum pump is used in heat preservation glass liner production, the pump case comprises a pump shell, the inside impeller of having installed of pump case, inducer b has been installed to the impeller rear end, inducer an has been installed to the impeller front end, the pump case rear end passes through the rearmounted end cover of bolt fixed mounting, the fixed extraction opening that is equipped with No. one in rearmounted end cover left side upper end, the fixed gas outlet that is equipped with No. one in rearmounted end cover right side upper end, rearmounted end cover rear end is equipped with the shaft coupling, the pump case front end is equipped with leading end cover through the bolt fastening, leading end cover left side upper end is fixed and is equipped with No. two extraction openings, leading end cover right side upper end is fixed. The utility model discloses can reduce the cavitation and lead to the fact the corruption to vacuum pump inside, and be provided with damping device, prevent that resonance phenomenon from producing.

Description

Vacuum pump is used in thermos flask courage production

Technical Field

The utility model relates to a vacuum pump technical field specifically is a vacuum pump is used in thermos flask courage production.

Background

Water ring pumps were initially used as self-priming pumps and then gradually used in many industrial sectors such as petroleum, chemical, mechanical, mining, light industry, medicine and food. In many processes of industrial production, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regaining, vacuum degassing and the like, water ring pumps are widely applied, and the existing water ring vacuum pumps have cavitation phenomena during operation, corrode impellers and possibly generate resonance. Therefore, the vacuum pump for producing the thermos flask liner is provided by the technical personnel in the field, so as to solve the problems in the background technology.

Disclosure of Invention

An object of the utility model is to provide a vacuum pump is used in thermos flask courage production to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a vacuum pump for thermos flask courage production, includes the pump case, the inside impeller that has installed of pump case, inducer b has been installed to the impeller rear end, inducer a has been installed to the impeller front end, the rear end of pump case passes through bolt fixed mounting rearmounted end cover, rearmounted end cover left side upper end is fixed and is equipped with the extraction opening No. one, rearmounted end cover right side upper end is fixed and is equipped with the gas outlet No. one, rearmounted end cover rear end is equipped with the shaft coupling, the pump case front end is equipped with leading end cover through bolt fixed, leading end cover left side upper end is fixed and is equipped with the extraction opening No. two, leading end cover right side upper end is fixed and.

The impeller rotates in the pump shell, the front end and the rear end of the impeller are respectively provided with an inducer a and an inducer b, the inducer a and the inducer b synchronously rotate along with the impeller, a proper amount of water is filled in the pump body as working fluid, when the impeller rotates clockwise according to the direction indicated in the figure, the water is thrown to the periphery by the impeller, due to the action of centrifugal force, the water forms a closed ring with approximate equal thickness determined by the shape of a pump cavity, the pressure inside the pump shell is reduced, gas enters from an air suction opening, when the impeller continuously rotates, the pressure in the cavity is reduced and increased, the gas is discharged from an air outlet, the inducer reduces the static positive suction pressure of the centrifugal pump, the static pressure is realized by increasing the static pressure of the first-stage impeller inlet of the centrifugal pump by the inducer, the rotational flow flowing out from the inducer also plays a role in reducing the net positive suction pressure head of the centrifugal pump, the phenomenon of cavitation is prevented from damaging the impeller, a plurality of vacuum, prevent a plurality of vacuum pumps from generating resonance together, and the bottom of the pump shell is provided with a damping device.

The upper end of the pump shell is provided with a control switch, the lower end of the damping spring is fixedly provided with a base, the rear end of the coupler is connected with a motor, the width of the impeller blade is the same as the length of the pump shell, the diameters of the first air exhaust opening and the second air exhaust opening are larger than the diameters of the first air exhaust opening and the second air exhaust opening, the control switch is electrically connected with the power supply and the motor, the pump shell is connected with the rear end cover, and a sealing gasket is arranged between the pump.

The motor is directly connected with the impeller to be connected with the movable impeller to rotate, the width of the impeller is large, the air suction opening is enlarged to avoid cavitation, the sealing gasket can keep the air tightness in the pump shell, and the working efficiency is improved.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the inducer is arranged at the two ends of the impeller to reduce the static positive suction pressure of the centrifugal pump, increase the diameter of the air suction opening, increase the width of the impeller blade and reduce the corrosion of cavitation to the inside of the vacuum pump;

2. the bottom is equipped with damping device, produces resonance and causes the damage to equipment when preventing a plurality of vacuum pumps from establishing ties.

Drawings

FIG. 1 is a schematic view of a vacuum pump for producing a thermos bottle liner.

FIG. 2 is a sectional view of a vacuum pump for producing a thermos flask liner.

FIG. 3 is a schematic view of a structure of a vane in a vacuum pump for producing a thermos flask liner.

In the figure: 1. a motor; 2. a coupling; 3. a rear end cover; 4. a first air extraction opening; 5. an impeller; 6. a control switch; 7. a pump housing; 8. a second air extraction opening; 9. a front end cover; 10. a second air outlet; 11. an inducer a; 12. a base; 13. a damping spring; 14. an inducer b; 15. and a first air outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-3, in an embodiment of the present invention, a vacuum pump for producing thermos liner, includes a pump case 7, an impeller 5 is installed inside the pump case 7, an inducer b14 is installed at the rear end of the impeller 5, an inducer a11 is installed at the front end of the impeller 5, a rear end cap 3 is installed at the rear end of the pump case 7 through a bolt, an air suction port 4 is fixedly installed at the upper end of the left side of the rear end cap 3, an air outlet 15 is fixedly installed at the upper end of the right side of the rear end cap 3, a shaft coupling 2 is installed at the rear end of the rear end cap 3, a front end cap 9 is installed at the front end of the pump case 7 through a bolt, a second air suction port 8 is fixedly installed at the upper end of the left side of the front end cap 9, a second air outlet 10 is fixedly installed at the upper end of.

The impeller 5 rotates in the pump shell 7, the front end and the rear end of the impeller 5 are respectively provided with an inducer a11 and an inducer b14, the inducer a11 and the inducer b14 rotate synchronously with the impeller 5, a proper amount of water is filled in the pump body as working liquid, when the impeller rotates clockwise according to the direction indicated in the figure, the water is thrown to the periphery by the impeller, due to the action of centrifugal force, the water forms a closed ring with approximate equal thickness determined by the shape of a pump cavity, the pressure inside the pump shell 7 is reduced, gas enters from an air suction opening, when the impeller 5 continues to rotate, the pressure is reduced, the gas is discharged from an air outlet, the inducer reduces the static positive suction pressure of the centrifugal pump, the static pressure is realized by increasing the static pressure of the first-stage impeller inlet of the centrifugal pump by the inducer, the rotational flow flowing out from the inducer also plays a role in reducing the net positive suction pressure head of the centrifugal pump, and the impeller 5 is prevented from, in order to improve the working efficiency of the vacuum pump, a plurality of vacuum pumps are often required to be connected in series to prevent the plurality of vacuum pumps from generating resonance together, and a damping device is arranged at the bottom of the pump shell 7.

The upper end of the pump shell 7 is provided with a control switch 6, the lower end of a damping spring 13 is fixedly provided with a base 12, the rear end of the coupler 2 is connected with the motor 1, the width of blades of the impeller 5 is the same as the length of the pump shell 7, the diameters of the first air exhaust opening 4 and the second air exhaust opening 8 are larger than the diameters of the first air exhaust opening 15 and the second air exhaust opening 10, the control switch 6 is electrically connected with a power supply and the motor 1, the pump shell 7 and the rear end cover 3 are provided, and a sealing gasket is arranged between the pump shell 7.

The motor 1 is directly connected with the impeller 5 to connect the impeller 5 to rotate, the width of the impeller 5 is large, the air suction opening is enlarged to avoid cavitation, the sealing gasket can keep the air tightness in the pump shell 7, and the working efficiency is improved.

The utility model discloses a theory of operation is: after a vacuum pump is connected with a power supply, a control switch 6 is turned on, the motor 1 starts to rotate, the motor 1 drives an impeller 5 to rotate in a pump shell 7 through a coupling 2, an inducer a11 and an inducer b14 are respectively arranged at the front end and the rear end of the impeller 5, the inducer a11 and the inducer b14 synchronously rotate along with the impeller 5, a proper amount of water is filled in a pump body as working liquid, when the impeller rotates clockwise according to the direction indicated in the drawing, the water is thrown to the periphery by the impeller, due to the action of centrifugal force, the water forms a closed circular ring which is approximately equal in thickness and is determined by the shape of a pump cavity, the pressure inside the pump shell 7 is reduced, gas enters from a gas suction opening, when the impeller 5 continuously rotates, the cavity is reduced in pressure and is increased, the gas is discharged from a gas outlet, the inducer reduces the static positive suction pressure of the centrifugal pump, which is realized by increasing the static pressure of the impeller inlet of the first stage of the centrifugal pump by the inducer, the impeller 5 is prevented from being damaged by cavitation, a plurality of vacuum pumps are often required to be connected in series to improve the working efficiency of the vacuum pumps, and the plurality of vacuum pumps are prevented from generating resonance together, so that the bottom of the pump shell 7 is provided with a damping device.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A vacuum pump for producing a thermos flask liner comprises a pump shell (7) and is characterized in that, the pump casing is characterized in that an impeller (5) is arranged in the pump casing (7), an inducer b (14) is arranged at the rear end of the impeller (5), an inducer a (11) is arranged at the front end of the impeller (5), a rear end cover (3) is fixedly arranged at the rear end of the pump casing (7) through bolts, a first air suction opening (4) is fixedly arranged at the upper end of the left side of the rear end cover (3), a first air outlet (15) is fixedly arranged at the upper end of the right side of the rear end cover (3), a coupler (2) is arranged at the rear end of the rear end cover (3), a coupler (2) is arranged at the front end of the pump casing (7), a front end cover (9) is fixedly arranged at the upper end of the left side of the front end cover (9), a second air suction opening (8) is fixedly arranged at the upper end of the right.

2. The vacuum pump for producing the thermos liner according to the claim 1, wherein the upper end of the pump casing (7) is provided with a control switch (6).

3. The vacuum pump for producing the thermos flask liner according to claim 1, wherein the lower end of the damping spring (13) is fixedly provided with a base (12).

4. The vacuum pump for producing the thermos flask liner according to claim 1, wherein the rear end of the coupling (2) is connected with a motor (1).

5. A vacuum pump for the production of thermos flasks as claimed in claim 1, characterized in that the impeller (5) has a blade width equal to the pump housing (7) length.

6. The vacuum pump for producing the thermos liner according to claim 1, wherein the diameters of the first air pumping port (4) and the second air pumping port (8) are larger than the diameters of the first air outlet (15) and the second air outlet (10).

7. The vacuum pump for producing the thermos liner according to claim 2, wherein the control switch (6) is electrically connected with a power supply and the motor (1).

8. The vacuum pump for producing vacuum flask liner as claimed in claim 1, wherein a sealing gasket is provided between the pump casing (7) and the rear end cap (3) and between the pump casing (7) and the front end cap (9).