CN117366010B - Ice-containing medium cleaning system and conveying pump thereof - Google Patents

Abstract

The invention discloses a delivery pump for an ice-containing medium cleaning system, which comprises a volute (10), an impeller (20), a diffuser (30) and a rotating shaft (40), wherein the impeller comprises a front disc (21), a rear disc (22) and blades (23); the method is characterized in that: the blade includes first blade (231), second blade (232), has radial clearance g between first blade and the second blade, and the front bezel includes first annular wallboard (211), second annular wallboard (212), also has radial clearance g between first annular wallboard and the second annular wallboard, is provided with backflow portion (213) on the first annular wallboard, and backflow portion is formed with the backflow passageway, and backflow passageway one end communicates in the second annular wallboard outside, and the other end communicates in radial clearance g. The invention can better reduce flow loss, balance axial force and reduce vibration, thereby improving the hydraulic performance and prolonging the service life of the conveying pump.

Description

An ice-containing medium cleaning system and its delivery pump

Technical Field

The invention relates to the technical field of ice particle and ice slurry cleaning systems, and in particular to an ice-containing medium cleaning system and a delivery pump thereof.

Background technique

As shown in Figure 1-2, the existing cleaning system containing ice medium includes a valve V, a delivery pump P, a mixer M, and a nozzle N. The ice medium (such as ice particles, ice slurry, etc.) is sprayed to the object to be cleaned through the nozzle N, and the delivery pump P is used to pump water, fluidized ice and other cleaning media. However, the existing delivery pump still has problems such as large flow loss, large vibration, and hydraulic performance needs to be further improved.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and provide an ice-containing medium cleaning system and a delivery pump thereof. The reflux flow rate is larger than that of the prior art design scheme in which one or more reflux holes are opened on the front disk, and the flow loss can be better reduced, the axial force can be balanced, and the vibration can be reduced, thereby improving the hydraulic performance and service life of the delivery pump.

In order to achieve the above object, the technical solution adopted by the present invention is:

A delivery pump for an ice-containing medium cleaning system comprises a volute (10), an impeller (20), a diffuser (30), and a rotating shaft (40). The impeller is installed in a volute cavity. The volute has a water pressure chamber. The impeller is installed on the rotating shaft. The diffuser is arranged between the outer periphery of the impeller and the water pressure chamber. The impeller is a centrifugal impeller. The impeller comprises a front disc (21), a rear disc (22), and blades (23). A plurality of blades are distributed along the circumferential direction and connected between the front disc and the rear disc. The invention is characterized in that the blades (23) comprise a first blade (231) and a second blade (232). A radial gap g is provided between the first blade and the second blade. The front disc (21) comprises a first annular wall plate (211) and a second annular wall plate (212). A radial gap g is also provided between the first annular wall plate and the second annular wall plate. A reflux portion (213) is arranged on the first annular wall plate. The reflux portion forms a reflux channel. One end of the reflux channel is connected to the outer side of the second annular wall plate, and the other end is connected to the radial gap g.

Furthermore, the return portion (213) includes a third annular wall plate (214), an arc-shaped transition portion (215), and a guide vane (216); the third annular wall plate is connected to the first annular wall plate via the arc-shaped transition portion, and a plurality of guide vanes are arranged between the third annular wall plate and the second annular wall plate.

Furthermore, the third annular wall plate is arranged in parallel with the first annular wall plate and the second annular wall plate, and the angle between the first annular wall plate, the second annular wall plate and the impeller rotation axis is 80-90°.

Furthermore, the outer diameter of the first blade (231) is equal to the outer diameter of the first annular wall plate (211), the inner diameter of the second blade (232) is equal to the inner diameter of the second annular wall plate (212), the radial distance from the radial outer peripheral surface of the third annular wall plate (214) to the radial inner peripheral surface of the second blade is 1.5-2.5 times the radial gap g, the radial length of the guide vane (216) is equal to 1-1.7 times the radial gap g, and the axial width between the third annular wall plate and the second annular wall plate is 0.8-1.5 times the radial gap g.

Furthermore, the first blade and the second blade are arc-shaped blades, the rotation direction or inclination direction of the first blade is opposite to that of the second blade, and in the circumferential direction, the first blade and the second blade are arranged in sequence at intervals, and the radial length of the first blade is greater than the radial length of the second blade.

Furthermore, the guide vane is an arc-shaped guide vane, a plurality of guide vanes are evenly distributed along the circumferential direction, and in the circumferential direction, a guide vane is arranged between adjacent first blades and second blades, and the guide vane has the same rotation direction or tilt direction as the second blade.

Furthermore, an arc-shaped guide portion (217) is provided on the inner side surface of the first annular wall plate (211), the cross section of the arc-shaped guide portion is a semicircular structure, the arc-shaped guide portion protrudes toward the rear disc side, the outer diameter of the arc-shaped guide portion is equal to the outer diameter of the first blade (231), and the radius of the arc-shaped guide portion is 0.5-0.8 times the radial gap g.

An ice-containing medium cleaning system comprises a valve (V), a delivery pump (P), a mixer (M), and a nozzle (N). The ice-containing medium is sprayed through the nozzle to clean an object to be cleaned, and the delivery pump is used to pump water or fluidized ice cleaning medium.

The ice-containing medium cleaning system and its delivery pump of the present invention have a larger reflux flow rate through the design of the reflux part, compared with the design scheme of the prior art in which one or more reflux holes are opened on the front disk, which can better reduce the flow loss, balance the axial force, and reduce the vibration, thereby improving the hydraulic performance and service life of the delivery pump.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the principle of an ice-containing medium cleaning system in the prior art;

FIG2 is a schematic diagram of the structure of a delivery pump in the prior art;

FIG3 is a schematic diagram of the impeller structure of the delivery pump of the present invention;

FIG4 is a schematic diagram of a partial structure of an impeller of a delivery pump of the present invention;

FIG5 is a schematic side view of the impeller structure of the delivery pump of the present invention;

FIG. 6 is a schematic diagram of the partial structure of the impeller of the delivery pump of the present invention.

In the figure: valve V, delivery pump P, mixer M, nozzle N; volute 10, water pressure chamber 11, impeller 20, front disc 21, rear disc 22, blade 23, first annular wall plate 211, second annular wall plate 212, reflux portion/reflux channel 213, third annular wall plate 214, arc-shaped transition portion 215, guide vane 216, arc-shaped guide portion 217, first blade 231, second blade 232, radial gap g, diffuser 30, first side wall 31, second side wall 32, rotating shaft 40.

Detailed ways

In order to make the technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described in detail in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present invention, which are only used to explain the present invention, not to limit the present invention. It should be noted that for the convenience of description, only the parts/structures related to the present invention are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other to obtain new embodiments.

Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present invention should be the common meanings understood by ordinary technicians in the field to which the present invention belongs.

The present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIG1 , the existing ice-containing medium cleaning system includes a valve V, a delivery pump P, a mixer M, and a nozzle N. The ice-containing medium (such as ice particles, ice slurry, etc.) is sprayed through the nozzle N to clean the object to be cleaned, and the delivery pump P is used to pump cleaning media such as water and fluidized ice.

As shown in FIG2 , an existing delivery pump for an ice-containing medium cleaning system includes a volute 10, an impeller 20, a diffuser 30, and a rotating shaft 40. The impeller 20 is installed in the volute cavity. The volute 10 has a water pressure chamber 11. The impeller 20 is installed on the rotating shaft 40. The rotating shaft 40 is connected to the motor transmission. The diffuser 30 is arranged between the outer periphery of the impeller 20 and the water pressure chamber 11.

The impeller 20 is a centrifugal impeller, and the impeller 20 includes a front disk 21, a rear disk 22, and blades 23. The plurality of blades 23 are distributed along the circumferential direction and connected between the front disk 21 and the rear disk 22. The diffuser 30 is a channel diffuser or a bladeless diffuser. The diffuser 30 includes a first side wall 31 and a second side wall 32. The first side wall 31 is radially arranged corresponding to the position of the rear disk 22, and the second side wall 32 is radially arranged corresponding to the position of the front disk 21.

As shown in Fig. 3-5, a delivery pump for an ice-containing medium cleaning system of the present invention comprises a volute 10, an impeller 20, a diffuser 30, and a rotating shaft 40. The impeller 20 is installed in the volute cavity. The volute 10 has a pressure water chamber 11. The impeller 20 is installed on the rotating shaft 40. The diffuser 30 is arranged between the outer periphery of the impeller 20 and the pressure water chamber 11. The impeller 20 is a centrifugal impeller. The impeller 20 comprises a front disc 21, a rear disc 22, and blades 23. The plurality of blades 23 are distributed along the circumferential direction and connected between the front disc 21 and the rear disc 22. The blades 23 include a first blade 231 and a second blade 232, a radial gap g is provided between the first blade 231 and the second blade 232, the front disk 21 includes a first annular wall plate 211 and a second annular wall plate 212, a radial gap g is also provided between the first annular wall plate 211 and the second annular wall plate 212 (that is, the first annular wall plate 211 and the second annular wall plate 212 are disconnected), a reflow portion 213 is provided on the first annular wall plate 211, and the reflow portion 213 forms a reflow channel, one end of the reflow channel is connected to the outer side of the second annular wall plate 212, and the other end is connected to the radial gap g.

Through the design of the reflux portion 213 (there is also a radial gap g between the first annular wall plate 211 and the second annular wall plate 212), the present invention has a larger reflux flow rate than the design scheme in the prior art in which one or more reflux holes are opened on the front disk, which can better reduce flow loss, balance axial force, and reduce vibration, thereby improving the hydraulic performance and service life of the delivery pump.

Furthermore, the return portion 213 includes a third annular wall plate 214, an arc-shaped transition portion 215, and a guide vane 216. The third annular wall plate 214 is connected to the first annular wall plate 211 through the arc-shaped transition portion 215, and a plurality of guide vanes 216 are provided between the third annular wall plate 214 and the second annular wall plate 212. The present invention improves the rectifying effect in the return channel and the connection strength of the impeller through the design of the guide vane 216.

The third annular wall plate 214 is arranged in parallel with the first annular wall plate 211 and the second annular wall plate 212. The included angle between the first annular wall plate 211 and the second annular wall plate 212 and the impeller rotation axis is 80-90°.

The outer diameter of the first blade 231 is equal to the outer diameter of the first annular wall plate 211, the inner diameter of the second blade 232 is equal to the inner diameter of the second annular wall plate 212, the radial distance from the radial outer peripheral surface of the third annular wall plate 214 to the radial inner peripheral surface of the second blade 232 is 1.5-2.5 times the radial gap g, the radial length of the guide vane 216 is equal to 1-1.7 times the radial gap g, and the axial width between the third annular wall plate 214 and the second annular wall plate 212 is 0.8-1.5 times the radial gap g.

As shown in Figure 5, the first blade 231 and the second blade 232 are arc-shaped blades. The rotation direction or inclination direction of the first blade 231 and the second blade 232 are opposite, and in the circumferential direction, the first blade 231 and the second blade 232 are arranged in sequence at intervals, and the radial length of the first blade 231 is greater than the radial length of the second blade 232.

The guide vane 216 is an arc-shaped guide vane, and a plurality of guide vanes 216 are evenly distributed along the circumferential direction. In the circumferential direction, a guide vane 216 is provided between adjacent first blades 231 and second blades 232, and the guide vane 216 has the same rotation direction or tilt direction as the second blade 232. The present invention can further reduce flow loss, balance axial force, reduce vibration, and improve impeller strength through the rotation direction and distribution design of the first blade 231, the second blade 232, and the guide vane 216, thereby improving the hydraulic performance and service life of the delivery pump.

As shown in FIG6 , in one embodiment, an arc-shaped flow guide 217 is provided on the inner side of the first annular wall plate 211. The arc-shaped flow guide 217 has a semicircular cross-section. The arc-shaped flow guide 217 protrudes toward the rear disc 22. The outer diameter of the arc-shaped flow guide 217 is equal to the outer diameter of the first blade 231. The radius of the arc-shaped flow guide 217 is 0.55-0.7 times the radial gap g. The design of the arc-shaped flow guide 217 can reduce turbulence when the return channel returns to the impeller inner cavity, thereby further reducing flow loss and vibration.

The ice-containing medium cleaning system and its delivery pump of the present invention have a larger reflux flow rate through the design of the reflux part, compared with the design scheme of the prior art in which one or more reflux holes are opened on the front disk, which can better reduce the flow loss, balance the axial force, and reduce the vibration, thereby improving the hydraulic performance and service life of the delivery pump.

The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (5)

1. A delivery pump for an ice-containing medium cleaning system comprises a volute (10), an impeller (20), a diffuser (30) and a rotating shaft (40), wherein the impeller is arranged in a volute cavity, the volute is provided with a pumping chamber, the impeller is arranged on the rotating shaft, and the diffuser is arranged between the periphery of the impeller and the pumping chamber; the impeller is a centrifugal impeller and comprises a front disc (21), a rear disc (22) and blades (23), wherein the blades are distributed along the circumferential direction and are connected between the front disc and the rear disc; the method is characterized in that: the blades (23) comprise a first blade (231) and a second blade (232), a radial gap g is formed between the first blade and the second blade, the front disc (21) comprises a first annular wall plate (211) and a second annular wall plate (212), a radial gap g is formed between the first annular wall plate and the second annular wall plate, a backflow part (213) is arranged on the first annular wall plate, a backflow channel is formed in the backflow part, one end of the backflow channel is communicated with the outer side of the second annular wall plate, and the other end of the backflow channel is communicated with the radial gap g;

The backflow part (213) comprises a third annular wall plate (214), an arc transition part (215) and guide vanes (216), the third annular wall plate is connected with the first annular wall plate through the arc transition part, and a plurality of guide vanes are arranged between the third annular wall plate and the second annular wall plate;

the third annular wall plate is arranged in parallel with the first annular wall plate and the second annular wall plate, and the included angle between the first annular wall plate and the impeller and the rotation axis of the impeller is 80-90 degrees;

the outer diameter of the first blade (231) is equal to the outer diameter of the first annular wall plate (211), the inner diameter of the second blade (232) is equal to the inner diameter of the second annular wall plate (212), the radial distance from the radial outer circumferential surface of the third annular wall plate (214) to the radial inner circumferential surface of the second blade is 1.5-2.5 times of the radial gap g, the radial length of the guide vane (216) is equal to 1-1.7 times of the radial gap g, and the axial width between the third annular wall plate and the second annular wall plate is 0.8-1.5 times of the radial gap g.

2. The transfer pump for an ice-containing medium cleaning system according to claim 1, wherein the first and second blades are arcuate blades having opposite directions of rotation or inclination and are circumferentially spaced apart from each other in sequence, and the radial length of the first blade is greater than the radial length of the second blade.

3. A transfer pump for an ice-containing medium cleaning system according to claim 2, wherein the guide vane is an arc guide vane, the guide vanes are uniformly distributed along the circumferential direction, and a guide vane is disposed between adjacent first and second vanes in the circumferential direction, and the direction of rotation or inclination of the guide vane is the same as that of the second vane.

4. A transfer pump for an ice medium cleaning system according to claim 3, wherein the inner side of the first annular wall plate (211) is provided with an arc-shaped guide part (217), the cross section of the arc-shaped guide part is in a semicircular structure, the arc-shaped guide part protrudes towards the disc side, the outer diameter of the arc-shaped guide part is equal to the outer diameter of the first blade (231), and the radius of the arc-shaped guide part is 0.3-0.9 times of the radial gap g.

5. An ice-containing medium cleaning system comprising a transfer pump for an ice-containing medium cleaning system according to claim 1, comprising a valve (V), a transfer pump (P), a mixer (M), a spray head (N), through which the ice-containing medium is sprayed for cleaning an object to be cleaned, the transfer pump being for pumping water or a fluid ice cleaning medium.