CN113819062A

CN113819062A - Centrifugal conveying pump

Info

Publication number: CN113819062A
Application number: CN202111081039.7A
Authority: CN
Inventors: 董文; 谷加祥; 陈思远; 董洪广; 陈进
Original assignee: Shangbaoluo Jiangsu Energy Saving Polytron Technologies Inc
Current assignee: Shangbaoluo Jiangsu Energy Saving Polytron Technologies Inc
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2021-12-21

Abstract

The invention discloses a centrifugal delivery pump, which relates to the technical field of delivery pumps and comprises the following components: the centrifugal pump comprises a pump body, an impeller and a driving device, wherein the impeller is arranged in a volute of the pump body, the volute is provided with an inlet and an outlet, the inlet is communicated with a feed inlet of the pump body, the outlet is communicated with a discharge outlet of the pump body, one end of the impeller, which is provided with centrifugal blades, faces the inlet, when the impeller rotates, fluid media at the inlet can be guided to the outlet, and the driving device can drive the impeller to rotate; the centrifugal conveying pump provided by the invention has high material conveying efficiency and an anti-blocking function.

Description

Centrifugal conveying pump

Technical Field

The invention relates to the technical field of delivery pumps, in particular to a centrifugal delivery pump.

Background

Centrifugal transfer pump is used for carrying liquid or fluid more, however, present centrifugal transfer pump often offers the cutting groove on the preceding welt in the pump body in order to reach the purpose of cutting the material, when the impeller drives the fluid at the spiral case internal rotation, the cutting groove can be to the long fiber in the fluid or the purpose that the slice material cut and reach preventing that the long fiber material from twining and blockking up the impeller on the impeller, nevertheless offer the cutting groove on the welt before adopting and need unnecessarily set up a preceding welt and dig on the preceding terminal surface of spiral case and establish the cutting groove, the above-mentioned scheme of welt has reduced the area of passing through of material widely before fixed on spiral case inner wall, and the conveying efficiency is reduced, therefore, need a neotype centrifugal transfer pump to solve above-mentioned problem urgently.

Disclosure of Invention

The invention aims to provide a centrifugal conveying pump, which is used for solving the problems in the prior art, improving the conveying efficiency and simultaneously having the anti-blocking effect.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a centrifugal delivery pump, comprising: the centrifugal pump comprises a pump body, an impeller and a driving device, wherein the impeller is arranged in a volute of the pump body, the volute is provided with an inlet and an outlet, the inlet is communicated with a feed inlet of the pump body, the outlet is communicated with a discharge outlet of the pump body, one end of the impeller, which is provided with centrifugal blades, faces the inlet, when the impeller rotates, fluid media at the inlet can be guided to the outlet, and the driving device can drive the impeller to rotate; a plurality of cutting blades are arranged on the end face, close to one end of the inlet, of the inner wall of the volute along the circumferential direction of the inlet, one end of each cutting blade extends towards the direction close to the inlet, and the other end of each cutting blade extends towards the direction far away from the inlet.

Preferably, the streamline of the cutting blade is consistent with that of a centrifugal blade on the impeller, and the rotating directions of the cutting blade and the centrifugal blade are opposite.

Preferably, the device further comprises a booster screw, the booster screw is fixedly arranged at one end, facing the inlet, of the impeller, and the booster screw extends along the axial direction of the impeller.

Preferably, a discharge flow channel for guiding flow is formed on the outer side of the impeller in the volute in the circumferential direction, the discharge flow channel is annular, the impeller can eject the fluid medium in a first direction when rotating, the wall surface of the discharge flow channel, which is far away from the inlet end, is a first wall surface, and the first wall surface extends in the first direction.

Preferably, the wall surface of the discharge channel far away from the impeller is a second wall surface, and the second wall surface is in smooth transition connection with the first wall surface.

Preferably, the impeller is an open centrifugal impeller, a plurality of centrifugal blades in the impeller are uniformly distributed on the same conical surface, and the first wall surface is located on the conical surface.

Preferably, the volute further comprises a rear lining plate fixedly arranged on the pump cover, the rear lining plate is in clearance fit with the blades, and a plurality of grooves used for allowing fluid media in the volute to flow to the volute outlet are formed in one end face, facing the blades, of the rear lining plate.

Preferably, the driving device comprises a rotating shaft and a motor, one end of the rotating shaft is located in the volute, the other end of the rotating shaft is in transmission connection with an output shaft of the motor, and the impeller is fixedly connected to one end, located in the volute, of the rotating shaft.

Preferably, the centrifugal delivery pump is a self-priming centrifugal delivery pump.

Compared with the prior art, the invention has the following technical effects:

the centrifugal conveying pump provided by the invention has the advantages that the end face of the inner wall of one end, close to the inlet, of the volute is provided with the plurality of cutting blades, long fibers and flaky substances in the conveying process are cut through the cutting blades, the long fibers and the flaky substances are prevented from being wound on the impeller to block the rotation of the impeller, and the long fibers and the flaky substances are prevented from blocking a conveying channel in the volute too much.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a centrifugal transfer pump according to the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is a schematic view of the centrifugal pump of FIG. 1 with cutting vanes disposed on the inner wall of the volute;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic diagram of the impeller of the centrifugal transfer pump of FIG. 1;

FIG. 6 is a cross-sectional view of FIG. 5;

FIG. 7 is a schematic diagram of the construction of the back liner in the centrifugal transfer pump of FIG. 1;

FIG. 8 is a cross-sectional view of FIG. 7;

FIG. 9 is a cross-sectional view of the channel on the rear liner of FIG. 7;

in the figure: 1-centrifugal delivery pump, 2-volute, 3-impeller, 4-rotating shaft, 11-feed inlet, 12-discharge outlet, 21-outlet, 22-inlet, 23-cutting blade, 24-pump cover, 25-rear liner plate, 251-groove body, 26-discharge flow channel, 261-first wall surface, 262-second wall surface and 31-centrifugal blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a centrifugal conveying pump to solve the problems in the prior art, and the centrifugal conveying pump provided by the invention is high in material conveying efficiency and has an anti-blocking function.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The invention provides a centrifugal delivery pump 1, preferably a self-priming centrifugal delivery pump, as shown in fig. 1, comprising: the centrifugal pump comprises a pump body, an impeller 3 and a driving device, wherein the impeller 3 is arranged in a volute 2 of the pump body, the volute 2 is provided with an inlet 22 and an outlet 21, the inlet 22 is communicated with a feed inlet 11 of the pump body, the outlet 21 is communicated with a discharge outlet 12 of the pump body, one end of the impeller 3, which is provided with a centrifugal blade 31, faces the inlet 22, when the impeller 3 rotates, fluid media at the inlet 22 can be guided to the outlet 21, and the driving device can drive the impeller 3 to rotate; the inner wall end face of the volute casing 2 close to one end of the inlet 22 is provided with a plurality of cutting blades 23 along the circumferential direction of the inlet 22, each cutting blade 23 is a strip-shaped protrusion, one end of each cutting blade 23 extends towards the direction close to the inlet 22, and the other end extends towards the direction far away from the inlet 22.

The invention provides a centrifugal conveying pump 1, wherein a plurality of cutting blades 23 are arranged on the end surface of the inner wall of one end of a volute 2 close to an inlet 22, long fibers and flaky substances in the conveying process are cut by the cutting blades 23, the long fibers and the flaky substances are prevented from being wound on an impeller 3 to block the rotation of the impeller 3, and the long fibers and the flaky substances are prevented from blocking a conveying channel in the volute 2 too much.

Further, as shown in fig. 3 to 6, the streamline of the cutting blade 23 is consistent with the streamline of the centrifugal blade 31 on the impeller 3, the rotating directions of the cutting blade 23 and the centrifugal blade 31 are opposite, the cutting blade 23 in the volute 2 can apply pressure to the material flowing between the centrifugal blades 31, and further the lift of the discharge port 12 during discharging is improved.

Further, the centrifugal delivery pump 1 further includes a pressurizing screw, the pressurizing screw is fixedly disposed at one end of the impeller 3 facing the inlet 22, the pressurizing screw extends along the feeding direction of the inlet 22, a discharge flow channel 26 for guiding flow is formed at the outer circumferential side of the impeller 3 in the volute 2, the discharge flow channel 26 is annular, the impeller 3 can eject the fluid medium along the first direction when rotating, the wall surface of the discharge flow channel 26 far away from the inlet 22 is a first wall surface 261, the first wall surface 261 extends along the first direction, the pressurizing screw provides enough conveying power for the fluid medium at the inlet 22 of the volute 2, the pressurizing screw can also provide pre-pressure for the fluid medium, so as to prevent the fluid medium from blocking the inlet 22, accelerate the flow speed of the fluid medium, increase the pressure of the fluid medium between the centrifugal blades 31, and increase the power when the fluid medium is ejected from the impeller 3, in addition, the fluid medium in the above manner has a large impact force on the scroll casing 2, and therefore, the inclination direction of the first wall surface 261 in the discharge flow channel 26 is set to be the same as the ejection direction of the fluid medium, so that the hydraulic impact of the fluid on the scroll casing 2 is reduced, the hydraulic loss is reduced, and the efficiency and the lift after discharge are improved.

Further, as shown in fig. 2, a wall surface of the discharge channel 26 away from the impeller 3 is a second wall surface 262, the second wall surface 262 is in smooth transition connection with the first wall surface 261, the second wall surface 262 is annular, the outlet 21 of the fluid medium in the volute 2 is preferably disposed on the second wall surface 262, and an arc-shaped guide surface is formed between the second wall surface 262 and the first wall surface 261, and the guide surface is used for guiding the fluid and has a certain buffering effect.

Further, impeller 3 is open centrifugal impeller 3, and a plurality of centrifugal blade 31 equipartitions in impeller 3 are located on same conical surface, and first wall 261 is located the conical surface, and open centrifugal impeller 3's quality is light, and the operation is more steady.

Further, as shown in fig. 7 to 9, the centrifugal pump further comprises a rear lining plate 25 fixedly arranged on the pump cover 24, the rear lining plate 25 is in clearance fit with the blades, a groove 251 used for fluid flowing is formed in one end face of the rear lining plate 25 facing the blades, flowing materials are also arranged in the groove 251 in actual work, the materials in the groove 251 can give thrust to the centrifugal blades 31 along the axial direction of the impeller 3 and towards the outlet 21 of the volute 2, the thrust can offset the extrusion force, received by the impeller 3 during material feeding, along the axial direction of the impeller 3 and towards the pump cover 24, so that the impeller 3 is stressed stably and is prevented from being damaged.

Further, the driving device comprises a rotating shaft 4 and a motor, one end of the rotating shaft 4 is located in the volute 2, the other end of the rotating shaft is in transmission connection with an output shaft of the motor, the impeller 3 is fixedly connected to one end, located in the volute 2, of the rotating shaft 4, and the impeller 3 is connected with the rotating shaft 4 through a flat key.

Further, as shown in fig. 1, the centrifugal delivery pump 1 is a self-priming centrifugal delivery pump, and a pressurizing screw is arranged to pre-pressurize a medium entering the impeller 3, so that the self-priming height of the self-priming pump is increased.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. A centrifugal transfer pump characterized by: the method comprises the following steps: the centrifugal pump comprises a pump body, an impeller and a driving device, wherein the impeller is arranged in a volute of the pump body, the volute is provided with an inlet and an outlet, the inlet is communicated with a feed inlet of the pump body, the outlet is communicated with a discharge outlet of the pump body, one end of the impeller, which is provided with centrifugal blades, faces the inlet, when the impeller rotates, fluid media at the inlet can be guided to the outlet, and the driving device can drive the impeller to rotate; a plurality of cutting blades are arranged on the end face, close to one end of the inlet, of the inner wall of the volute along the circumferential direction of the inlet, one end of each cutting blade extends towards the direction close to the inlet, and the other end of each cutting blade extends towards the direction far away from the inlet.

2. The centrifugal transfer pump of claim 1, wherein: the streamline of the cutting blade is consistent with that of a centrifugal blade on the impeller, and the rotating directions of the cutting blade and the centrifugal blade are opposite.

3. The centrifugal transfer pump of claim 1, wherein: still include the pressure boost spiral, the pressure boost spiral fixed set up in the impeller orientation the one end of import, just the pressure boost spiral is followed the axial extension of impeller sets up.

4. The centrifugal transfer pump of claim 1, wherein: the spiral casing is characterized in that a discharge flow channel for guiding flow is formed on the outer side of the impeller in the circumferential direction in the spiral casing, the discharge flow channel is annular, the impeller can eject the fluid medium in a first direction when rotating, the wall surface of one end, far away from the inlet, of the discharge flow channel is a first wall surface, and the first wall surface extends in the first direction.

5. The centrifugal transfer pump of claim 4, wherein: the wall surface of the discharging flow channel, which is far away from the impeller, is a second wall surface, and the second wall surface is in smooth transition connection with the first wall surface.

6. The centrifugal transfer pump of claim 5, wherein: the impeller is an open centrifugal impeller, a plurality of centrifugal blades are uniformly distributed on the same conical surface, and the first wall surface is located on the conical surface.

7. The centrifugal transfer pump of claim 6, wherein: the volute also comprises a rear lining plate fixedly arranged on the pump cover, the rear lining plate is in clearance fit with the blades, and a plurality of groove bodies used for supplying fluid media in the volute to flow to the volute outlet are formed in one end face of the rear lining plate, which faces the blades.

8. The centrifugal transfer pump of claim 1, wherein: the driving device comprises a rotating shaft and a motor, one end of the rotating shaft is located in the volute, the other end of the rotating shaft is in transmission connection with an output shaft of the motor, and the impeller is fixedly connected to one end, located in the volute, of the rotating shaft.

9. The centrifugal transfer pump of claim 3, wherein: the centrifugal delivery pump is a self-suction centrifugal delivery pump.