CN114251269B

CN114251269B - High-lift food-grade sanitary pump

Info

Publication number: CN114251269B
Application number: CN202011012620.9A
Authority: CN
Inventors: 姜瑞岳; 项仙娜
Original assignee: Wenxiong Holding Group Co ltd
Current assignee: Wenxiong Holding Group Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2024-08-20
Anticipated expiration: 2040-09-24
Also published as: CN114251269A

Abstract

The invention provides a high-lift food-grade sanitary pump which comprises a pump body, a motor and a pump shaft, wherein the pump body is connected with the motor, a pump cavity is formed in the pump body, the pump shaft is arranged in the pump cavity, the pump body is provided with an inlet and an outlet which are mutually vertical, the inlet is opposite to the center of the pump shaft, one end of the pump shaft is provided with an impeller, the other end of the pump shaft is provided with a mechanical sealing piece, the mechanical sealing piece is sleeved outside the pump shaft, the mechanical sealing piece comprises a movable ring seat and a static ring seat, the movable ring seat and the static ring seat are connected with the pump shaft, the impeller comprises an impeller body and a plurality of blades uniformly distributed on the periphery of the impeller, the impeller body radially extends outwards to form the blades, a conveying runner is arranged in the blades, the center of the impeller body is provided with a main runner which is communicated with the conveying runner, the main runner comprises a pressurizing section and a depressurizing section which is communicated with the pressurizing section, and the caliber of which is larger than that of the pressurizing section, and the flow channel is arranged in the blades of the impeller, so that the blades of the impeller can uniformly outflow liquid and the conveying pressure is ensured.

Description

High-lift food-grade sanitary pump

Technical Field

The invention relates to a centrifugal food-grade sanitary pump for fine chemical engineering, in particular to a high-lift food-grade sanitary pump.

Background

Food grade sanitary pumps are a classification of pumps from the occasion of use of the pump, in particular concerning the delivery of all products in contact with the human body, such as pharmaceuticals, dairy products, beverages, food, cosmetics, food additives, fine chemicals, etc.

Food grade sanitary pumps are of four basic types, centrifugal, positive displacement, jet and air. Centrifugal pumps apply centrifugal force to create a speed, use a rotating impeller to increase the speed, and push fluid through an outlet valve.

The blades of the food-grade sanitary pump impeller are generally backward bent blades, the blades are cylindrical and twisted, the application of the twisted blades can reduce the load of the blades, improve the suction performance of the centrifugal pump and the cavitation resistance, but the manufacturing difficulty is high and the manufacturing cost is high.

Most of impellers adopted by the existing food-grade sanitary pumps are semi-open impellers, and compared with the fully-open impellers, the semi-open impellers are higher in conveying pressure, higher in lift and higher in efficiency, but the semi-open impellers also have the defect of relatively higher manufacturing difficulty; the semi-open impeller has lower manufacturing difficulty and lower efficiency than the closed impeller. The food-grade sanitary pump generally needs to have higher lift and higher pressure when conveying clean water and low-viscosity materials, so that a closed impeller is more suitable. The existing closed impeller mainly comprises blades, a front cover plate and a rear cover plate which form opposite closed conveying spaces, flow passages are formed among the blades, leakage gaps are formed between the blades and the inner wall of the pump body, and therefore the closed impeller is only relatively speaking. The existing closed impeller has higher efficiency than the semi-open impeller to a certain extent, but the manufacturing difficulty is still higher, and besides, the existing high-pressure leakage problem is still difficult to overcome. In addition, when the conventional food-grade sanitary pump is used, cavitation phenomenon is generally formed at the inlet of the pump body blade by the change of liquid pressure, the pump body is generally vibrated by the cavitation phenomenon, and the impact force formed when bubbles are broken also damages the inner wall of the pump body.

Disclosure of Invention

In view of this, the present invention provides a high-lift food grade hygienic pump.

In order to achieve the above purpose, the present invention provides the following technical solutions:

A high lift food grade hygienic pump, characterized in that: comprises a pump body, a motor and a pump shaft, wherein the pump body is connected with the motor, a pump cavity is formed in the pump body, the pump shaft is arranged in the pump cavity, an inlet and an outlet which are mutually perpendicular are formed in the pump body, the inlet is opposite to the center of the pump shaft, an impeller is arranged at one end of the pump shaft, a mechanical sealing piece is arranged at the other end of the pump shaft, the mechanical sealing piece is sleeved outside the pump shaft and comprises a movable ring seat and a static ring seat, the movable ring seat and the static ring seat are connected with the pump shaft, the impeller comprises an impeller body and a plurality of blades uniformly distributed on the periphery of the impeller, the impeller body radially extends outwards to form the blades, a conveying runner is arranged in the blades, a main runner is arranged at the center of the impeller body and is communicated with the conveying runner, the main runner comprises a pressurizing section, a decompression section which is communicated with the pressurizing section and has a caliber larger than that of the pressurizing section, the pressure-reducing limiting ring is formed between the pressure-increasing section and the pressure-reducing section, an opening is formed in the center of the pressure-reducing limiting ring and is communicated with the pressure-increasing section and the pressure-reducing section, the aperture of the conveying flow channel is smaller than that of the opening of the pressure-reducing limiting ring, the conveying flow channel is mutually perpendicular to the main flow channel, a cavitation-inhibiting groove is formed in the bottom of the inner wall of the inlet of the conveying flow channel, the cavitation-inhibiting groove extends along the flow direction of the conveying flow channel and is arc-shaped in section, a movable ring is arranged on one side of the movable ring seat, a sealing gland is arranged on one side of the movable ring, a front spring groove and a screw hole are formed in the sealing gland, a front spring is arranged in the front spring groove, the front spring corresponds to the movable ring and the sealing gland, a screw is arranged in the screw hole, the screw extends into the screw hole, the screw penetrates through the movable ring and is connected with the stationary ring, a sealing sleeve is further arranged outside the pump shaft, the sealing sleeve is provided with a rear spring groove and a rear screw hole, a rear spring is arranged in the rear spring groove, the rear spring is correspondingly connected with the sealing sleeve and the static ring seat, a screw is arranged in the rear screw hole, the screw penetrates through the static ring seat, and the screw stretches into the rear screw hole.

Preferably, a boss is formed by protruding one end face of the impeller body, a groove is formed by sinking the top face of the boss, the diameter of the boss is smaller than that of the impeller body, the groove is communicated with a main runner of the impeller body, an opening corresponding to the blade is formed in the inner wall of the groove, and the bottom of the opening and the bottom wall of the groove are located on the same horizontal plane.

Preferably, the number of the blades is at least 4 and the blades are even, and the blades are long rectangular.

Preferably, the end face, far away from the boss, of the impeller body forms a mounting groove corresponding to the pump shaft, the periphery of the mounting groove is convex to form a convex surface, and the diameter of the convex surface is smaller than that of the impeller body.

Preferably, a communication hole is arranged in the groove, the communication hole penetrates through the groove, and the communication hole is communicated with the mounting groove.

Preferably, the movable ring is sleeved outside the pump shaft, and the sealing gland is connected with the movable ring.

Preferably, a static ring is arranged on one side of the static ring seat, the static ring is sleeved outside the movable ring seat, and two ends of the static ring are oppositely connected with the static ring seat and the movable ring in a butt joint mode.

The invention has the beneficial effects that: the flow channels are arranged in the blades of the impeller, so that the liquid can uniformly flow out, meanwhile, the conveying pressure is ensured, the flow velocity of the liquid is improved, and the pump has higher lift compared with the existing food-grade sanitary pump; the impeller body is designed to effectively improve the distribution condition of fluid pressure in the impeller body, improve the cavitation resistance of the impeller and ensure that the body structure is more stable; the conveying flow passage is provided with the cavitation inhibition groove, so that the bubble breaking caused by cavitation is facilitated to be accelerated, the bubble is prevented from entering the blade and breaking under high pressure to impact the inner wall of the blade, and the pressure in the pump cavity is enabled not to leak and inhale and spray in the frequent alternating process by arranging the front spring and the rear spring.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the impeller structure of the present invention;

FIG. 3 is a schematic diagram of a seal structure;

FIG. 4 is a front view of the impeller of the present invention;

FIG. 5 is a cross-sectional view of the impeller;

Fig. 6 is a schematic view of 6 impeller blades.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention will be further described with reference to the drawings.

The invention provides the following technical scheme:

As shown in figures 1-3, the invention discloses a high-lift food-grade sanitary pump, which comprises a pump body 1, a motor 2 and a pump shaft 4, wherein the pump body 1 is connected with the motor 2, a pump cavity is formed in the pump body 1, the pump shaft 4 is arranged in the pump cavity, the pump body 1 is provided with an inlet and an outlet which are mutually vertical, the inlet is opposite to the center of the pump shaft 4, one end of the pump shaft 4 is provided with an impeller 5, the other end of the pump shaft 4 is provided with a mechanical sealing element 3, the mechanical sealing element 3 is sleeved outside the pump shaft 4, the mechanical sealing element 3 comprises a movable ring seat 24 and a static ring seat 14, the movable ring seat 24 and the static ring seat 14 are connected with the pump shaft 4, the impeller 5 comprises an impeller body 6 and a plurality of blades 7 which are uniformly distributed on the periphery of the impeller 5, the impeller comprises an impeller body 6, a blade 7, a conveying runner 9, a main runner 27, a pressurizing section 28, a decompression section 29, a decompression limiting ring 30, a cavitation suppressing groove 31 and a cavitation suppressing groove 31, wherein the impeller body 6 is radially extended outwards to form the blade 7, the conveying runner 9 is arranged in the blade 7, the main runner 27 is communicated with the conveying runner 9, the main runner 27 comprises the pressurizing section 28, the decompression section 29 which is communicated with the pressurizing section 28 and has a caliber larger than that of the pressurizing section 28, the decompression limiting ring 30 is formed between the pressurizing section 28 and the decompression section 29, and an opening is formed in the center of the decompression limiting ring 30 to be communicated with the pressurizing section 28 and the decompression section 29.

The aperture of the conveying flow channel 9 is smaller than that of the opening of the decompression limiting ring, the conveying flow channel 9 is perpendicular to the main flow channel 27, a cavitation suppression groove 31 is formed in the bottom of the inner wall of the inlet of the conveying flow channel 9, and the cavitation suppression groove 31 extends along the flow direction of the conveying flow channel 9 and is arc-shaped in section. Through set up transport runner 9 in impeller 5's blade 7 for the pressure of carrying has been guaranteed when the liquid can even outflow, has improved the velocity of flow of liquid, has higher lift than current food grade sanitary pump. The cavitation suppression groove 31 reduces cavitation of the conveyed liquid, prevents the conveyed liquid from forming a large number of bubbles in the conveying flow channel 9, and helps to protect the inner wall of the blade, and meanwhile, the stability of the sanitary pump is maintained due to the reduction of cavitation.

Further, the protruding boss 8 that forms of impeller body 6 terminal surface, boss 8 top surface subsides forms the recess, the diameter of boss 8 is less than impeller body 6, recess 25 intercommunication impeller body's sprue, the recess 25 inner wall sets up the opening 19 that corresponds blade 7, the opening 19 bottom is in same horizontal plane with the diapire of recess 25, the effectual distribution condition that improves the inside fluid pressure of impeller body of design, has improved the anti cavitation performance of impeller, and body structure is more stable, and opening 19 and delivery runner 9 intercommunication, opening 19 and recess 25 diapire are in same horizontal plane can improve the speed of liquid through impeller 5 for liquid is faster to go into delivery runner 9 and flow out through delivery runner 9.

Specifically, at least 4 blades 7 are arranged, the blades 7 are distributed on the outer side of the impeller body 6 at equal intervals, the blades 7 are in a long rectangular parallelepiped shape, the blades 7 and the impeller 5 can be of an integrated structure, the impeller 5 extends outwards to form a plurality of blades 7, and the blades 7 and the impeller 5 can be made of stainless steel, aluminum alloy and plastic; the blade 7 and the impeller 5 can also be of a detachable structure, the connecting end of the blade 7 and the impeller 5 can be provided with threads, the impeller 5 is provided with screw holes corresponding to the threads, the connecting end of the blade 7 stretches into the screw holes to be connected and fixed with the impeller 5, and the screw holes and the conveying flow channels of the blade 7 are of concentric circle structures.

Specifically, the conveying runner 9 is arranged inside the blade 7, the conveying runner 9 is a direct-current runner, the flow speed of liquid in passing through the runner can be increased due to the arrangement of the direct-current runner, and compared with an arc-shaped runner, the impact force of the liquid in the direct-current runner is smaller than that in the arc-shaped runner, so that the liquid in the runner is better and more stable, the impeller 5 is a closed impeller, and the closed impeller is provided with front and rear cover plates on two sides of the blade, so that the efficiency is high, and the device is suitable for conveying clean liquid without impurities.

The number of the blades 7 can be set to be 6, when the number of the blades 7 is increased from 4 to 6, the displacement coefficient of the blades 7 is increased, the friction loss of the blades 7 is also increased, but on the other hand, the stability of liquid flow can be improved due to the number of the blades 7, and the functional capacity of the blades 7 is also increased.

Specifically, the terminal surface that boss 8 was kept away from to impeller body 6 corresponds pump shaft 4 and forms the mounting groove, the periphery arch of mounting groove forms convex surface 26, the diameter of convex surface 26 is less than the diameter of impeller body, pump shaft 4 stretches into in the mounting groove and is connected fixedly with impeller body 6, the diameter of convex surface 26 is less than impeller body 6, the height and the diameter of convex surface 26 set up according to the length and the diameter of pump shaft, the setting of convex surface 26 makes also impeller 5 inseparabler with the connection of outside, improves the leakproofness, prevents that liquid from revealing.

Specifically, a communication hole (not shown) is disposed in the groove 25, the communication hole penetrates through the groove 25, and the communication hole is communicated with a mounting groove (not shown).

Referring to fig. 3, a moving ring 11 is disposed on one side of the moving ring seat 24, the moving ring 11 is sleeved outside the pump shaft 4, a sealing gland 10 is disposed on one side of the moving ring 11 away from the moving ring seat 24, and the sealing gland 10 is connected with the moving ring 11.

Specifically, a stationary ring 12 is disposed on one side of the stationary ring seat 14, the stationary ring 12 is sleeved outside the moving ring seat 24, and two ends of the stationary ring 12 are in butt joint with the stationary ring seat 14 and the moving ring 11.

The sealing ring is arranged between the static ring seat 14 and the sealing shaft sleeve, the static ring seat 14 is provided with a static ring seat sealing groove 23, the static ring seat sealing groove 23 is internally provided with a static ring seat sealing ring 22, the static ring seat sealing ring 22 is correspondingly abutted against the static ring seat 14 and the sealing shaft sleeve, the static ring 12 and the pump shaft 4 can be provided with a static ring sealing ring 20, the static ring 12 is provided with a static ring sealing groove 21, the static ring sealing ring 20 is fixed in the static ring sealing groove 21, the static ring sealing ring 20 is correspondingly abutted against the static ring sealing groove 21 and the pump shaft 4, the static ring sealing ring 20 and the static ring seat sealing ring 22 are elastic rubber, the sealing performance can be improved, the damage caused by abrasion is reduced, and the cross sections of the static ring sealing ring 20 and the static ring seat sealing ring 22 are circular.

Further, at least two screw holes and at least two rear spring grooves 15 are formed in the sealing shaft sleeve, at least two screw holes and at least two front spring grooves 16 are formed in the sealing gland 10, springs in the front spring grooves 16 and the rear spring grooves 15 are all of the same type, and the positions of the movable ring 11 can be effectively adjusted by the front springs 17 and the rear springs 13, so that the sealing performance of the sanitary pump is effectively guaranteed.

Specifically, the sealing gland 10 is provided with a front spring groove 16 and a screw hole, a front spring 17 is arranged in the front spring groove 16, the front spring 17 is correspondingly connected with the movable ring 11 and the sealing gland 10, a screw is arranged in the screw hole, the screw extends into the screw hole, and the screw penetrates through the movable ring 11 to be connected with the static ring 12.

Specifically, the outside sealed axle sleeve that still sets up of pump shaft 4, set up back spring groove 15 and back screw on the sealed axle sleeve, set up back spring 13 in the back spring groove 15, back spring 13 corresponds and connects sealed axle sleeve and quiet ring seat 14, set up the screw in the back screw, the screw passes quiet ring seat 14, just in the screw stretches into the back screw, through setting up preceding spring 17 and back spring 13, the pressure that makes the pump intracavity can not appear leaking and inhale and hydrojet in frequent alternating process.

Specifically, a rotating shaft is arranged on the motor 2, and extends into the pump body 1 to be connected with the pump shaft 4.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high lift food grade hygienic pump, characterized in that: comprises a pump body, a motor and a pump shaft, wherein the pump body is connected with the motor, a pump cavity is formed in the pump body, the pump shaft is arranged in the pump cavity, an inlet and an outlet which are mutually perpendicular are formed in the pump body, the inlet is opposite to the center of the pump shaft, an impeller is arranged at one end of the pump shaft, a mechanical sealing piece is arranged at the other end of the pump shaft, the mechanical sealing piece is sleeved outside the pump shaft and comprises a movable ring seat and a static ring seat, the movable ring seat and the static ring seat are connected with the pump shaft, the impeller comprises an impeller body and a plurality of blades uniformly distributed on the periphery of the impeller, the impeller body radially extends outwards to form the blades, a conveying runner is arranged in the blades, a main runner is arranged at the center of the impeller body and is communicated with the conveying runner, the main runner comprises a pressurizing section, a decompression section which is communicated with the pressurizing section and has a caliber larger than that of the pressurizing section, the pressure-reducing limiting ring is formed between the pressure-increasing section and the pressure-reducing section, an opening is formed in the center of the pressure-reducing limiting ring and is communicated with the pressure-increasing section and the pressure-reducing section, the aperture of the conveying flow channel is smaller than that of the opening of the pressure-reducing limiting ring, the conveying flow channel is mutually perpendicular to the main flow channel, a cavitation-inhibiting groove is formed in the bottom of the inner wall of the inlet of the conveying flow channel, the cavitation-inhibiting groove extends along the flow direction of the conveying flow channel and is arc-shaped in section, a movable ring is arranged on one side of the movable ring seat, a sealing gland is arranged on one side of the movable ring, a front spring groove and a screw hole are formed in the sealing gland, a front spring is arranged in the front spring groove, the front spring corresponds to the movable ring and the sealing gland, a screw is arranged in the screw hole, the screw extends into the screw hole, the screw penetrates through the movable ring and is connected with the stationary ring, a sealing sleeve is further arranged outside the pump shaft, the sealing sleeve is provided with a rear spring groove and a rear screw hole, a rear spring is arranged in the rear spring groove, the rear spring is correspondingly connected with the sealing sleeve and the static ring seat, a screw is arranged in the rear screw hole, the screw penetrates through the static ring seat, and the screw stretches into the rear screw hole.

2. The high-lift food-grade sanitary pump of claim 1, wherein: the impeller comprises an impeller body, wherein one end face of the impeller body protrudes to form a boss, the top face of the boss sinks to form a groove, the diameter of the boss is smaller than that of the impeller body, the groove is communicated with a main runner of the impeller body, an opening corresponding to the blade is formed in the inner wall of the groove, and the bottom of the opening and the bottom wall of the groove are located on the same horizontal plane.

3. The high-lift food-grade sanitary pump of claim 1, wherein: the blade sets up 4 at least and is even number setting, the blade is rectangular cuboid form of rectangular.

4. The high-lift food-grade sanitary pump of claim 2, wherein: the end face of the impeller body, which is far away from the boss, corresponds to the pump shaft to form a mounting groove, the periphery of the mounting groove is convex to form a convex surface, and the diameter of the convex surface is smaller than that of the impeller body.

5. The high-lift food-grade hygienic pump according to claim 4, wherein: the groove is internally provided with a communication hole, the communication hole penetrates through the groove, and the communication hole is communicated with the mounting groove.

6. The high-lift food-grade sanitary pump of claim 1, wherein: the movable ring is sleeved outside the pump shaft, and the sealing gland is connected with the movable ring.

7. The high-lift food-grade sanitary pump of claim 1, wherein: the static ring seat is characterized in that a static ring is arranged on one side of the static ring seat, the static ring is sleeved outside the movable ring seat, and two ends of the static ring are oppositely connected with the static ring seat and the movable ring in a abutting mode.