Delivery pump for cleaning system using ice-containing medium

Abstract

Disclosed in the present invention is a delivery pump for a cleaning system using an ice-containing medium. The delivery pump comprises a volute (10), an impeller (20), a diffuser (30) and a rotary shaft (40), wherein the impeller comprises a front disc (21), a rear disc (22) and blades (23); and the diffuser comprises a first side wall (31) and a second side wall (32). The delivery pump is characterized in that the second side wall comprises an arc-shaped transition portion (33); a backflow channel is formed in the arc-shaped transition portion; the backflow channel comprises a first arc-shaped channel (34) and a second arc-shaped channel (35); the front disc is provided with communication grooves (24); and a plurality of communication grooves are distributed in a circumferential direction, such that part of a liquid in the diffuser flows back into an impeller flow channel outlet portion of the impeller through the backflow channel and the communication grooves. The present invention can effectively reduce pressure fluctuation, pressure loss and vibration, thus improving the hydraulic performance and stability of the delivery pump.

Description

A delivery pump for an ice-containing medium cleaning system Technical Field

[0001] The present invention relates to the technical field of ice particle and ice slurry cleaning systems, and in particular to a delivery pump for an ice-containing medium cleaning system. Background Art

[0002] As shown in Figure 1-2, 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 or ice slurry) is sprayed through the nozzle N to clean the object being cleaned. The delivery pump P is used to pump water, fluidized ice, and other cleaning media. However, existing delivery pumps still suffer from large pressure fluctuations, high pressure loss, and high vibration, and their hydraulic performance needs to be further improved. Technical Solutions

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a delivery pump for an ice-containing medium cleaning system. The design of the return channel and the connecting groove allows part of the liquid in the diffuser to flow back to the impeller flow channel outlet of the impeller through the return channel and the connecting groove, which can effectively reduce pressure fluctuations, reduce pressure losses, and reduce vibration, thereby improving the hydraulic performance and stability of the delivery pump.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A delivery pump for an ice-containing medium cleaning system, comprising 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 pressure water chamber (11); the impeller is installed on the rotating shaft; a diffuser is provided between the outer periphery of the impeller and the pressure water chamber; the impeller is a centrifugal impeller, comprising a front disc (21), a rear disc (22), and blades (23); a plurality of blades are distributed along the circumference and connected between the front disc and the rear disc; the diffuser is a channel diffuser or a bladeless diffuser, and the diffuser comprises A first side wall (31) and a second side wall (32), wherein the first side wall is radially arranged corresponding to the rear position and the second side wall is radially arranged corresponding to the front disc position; characterized in that: the second side wall (32) includes an arcuate transition portion (33), the arcuate transition portion forms a return channel, the return channel includes a first arcuate channel (34) and a second arcuate channel (35), a connecting groove (24) is opened on the front disc, and the plurality of connecting grooves are distributed along the circumferential direction, so that part of the liquid in the diffuser flows back to the impeller flow channel outlet of the impeller through the return channel and the connecting groove.

[0006] Furthermore, a guide vane (36) is provided in the first arc-shaped channel (34), and a plurality of guide vanes are distributed along the circumferential direction. The circumferential extension range of the first arc-shaped channel is 360°; and the second arc-shaped channel (35) is a plurality of arc-shaped channels distributed along the circumferential direction.

[0007] Furthermore, the connecting grooves (24) are a plurality of connecting grooves distributed along the circumferential direction, the radial dimension from the inner end of the connecting groove to the impeller rotation axis is substantially equal to the radial dimension from the inner end of the return channel to the impeller rotation axis, and the outer end of the connecting groove extends to the front disk or the outer periphery of the blade.

[0008] Furthermore, the guide plate (36) has an upstream edge (37) and a downstream edge (38), the upstream edge being designed as a corrugated concave-convex structure, and the upstream edge being substantially flush with the inner side surface of the second side wall.

[0009] Furthermore, the blade has an outer peripheral edge (25), the diffuser has an inner peripheral edge (39), the inner peripheral edge is located radially outside the outer peripheral edge, the angle a between the downstream edge and the inner peripheral edge is 155-175 degrees, and the circumferential coverage angle of the return channel is 150-170 degrees.

[0010] Furthermore, when viewed from an axial perspective, the connecting groove (24) is rectangular or U-shaped; the radius of the arcuate wall of the first arcuate channel (34) and the second arcuate channel (35) is equal, the axial dimension of the outlet of the impeller flow channel is equal to the axial dimension of the inlet of the diffuser flow channel, the angle between the upstream edge (37) and the inner peripheral edge (39) is 100-110°, and the radius of the bottom arcuate surface of the connecting groove is equal to the radius of the arcuate wall of the second arcuate channel.

[0011] Furthermore, the downstream edge (38) is also designed to have a corrugated concave-convex structure, and the height and width of the crest or trough of the corrugation of the downstream edge are greater than the height and width of the crest or trough of the corrugation of the upstream edge (37).

[0012] Furthermore, the arc-shaped transition portion (33), the second side wall (32) and the volute are integrally formed, and the first side wall (31) and the volute are separate bodies. Beneficial effects

[0013] A delivery pump for an ice-containing medium cleaning system of the present invention, through the design of a reflux channel and a connecting groove, allows part of the liquid in the diffuser to flow back to the impeller flow channel outlet of the impeller through the reflux channel and the connecting groove, which can effectively reduce pressure fluctuations, reduce pressure losses, and reduce vibrations, thereby improving the hydraulic performance and stability of the delivery pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic diagram showing the principle of an ice-containing medium cleaning system in the prior art;

[0015] FIG2 is a schematic diagram of the structure of a delivery pump in the prior art;

[0016] FIG3 is a schematic diagram of a partial structure of a delivery pump for an ice-containing medium cleaning system according to the present invention;

[0017] FIG4 is a schematic diagram of the partial structure of the delivery pump of the present invention.

[0018] 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, blades 23, connecting groove 24, outer periphery 25, diffuser 30, first side wall 31, second side wall 32, arc-shaped transition portion 33, first arc-shaped channel 34, second arc-shaped channel 35, guide vane 36, upstream edge 37, downstream edge 38, inner periphery 39, rotating shaft 40. Best Mode for Carrying Out the Invention

[0019] To make the technical solution and its advantages of the present invention more clear, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present invention and are only used to explain the present invention, not to limit the present invention. It should be noted that, for ease of description, the accompanying drawings only show the parts / structures related to the present invention. 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.

[0020] All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention. Furthermore, unless otherwise defined, technical or scientific terms used in the description of the present invention shall have the same meanings as those generally understood by persons of ordinary skill in the art to which the present invention belongs.

[0021] The present invention will be described in further detail below with reference to the accompanying drawings.

[0022] As shown in Figure 1, 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 to the object to be cleaned through the nozzle N for cleaning. The delivery pump P is used to pump water, fluidized ice, and other cleaning media.

[0023] 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 pressurized water chamber 11. The impeller 20 is installed on the rotating shaft 40. The rotating shaft 40 is connected to the motor in a transmission manner. The diffuser 30 is provided between the outer periphery of the impeller 20 and the pressurized water chamber 11.

[0024] The impeller 20 is a centrifugal impeller, which includes a front disk 21, a rear disk 22, and blades 23. The multiple blades 23 are distributed circumferentially 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.

[0025] As shown in Figures 3-4, a delivery pump for an ice-containing medium cleaning system of the present invention 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 pressure water chamber 11. The impeller 20 is installed on the rotating shaft 40. The diffuser 30 is provided between the outer periphery of the impeller 20 and the pressure water chamber 11. The impeller 20 is a centrifugal impeller, and the impeller 20 includes a front disc 21, a rear disc 22, and blades 23. The plurality of blades 23 are distributed along the circumference and connected between the front disc 21 and the rear disc 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 at a position corresponding to the rear disc 22, and the second side wall 32 is radially arranged at a position corresponding to the front disc 21. The diffuser 30 is characterized in that the second side wall 32 includes an arcuate transition portion 33, which forms a return channel. The return channel includes a first arcuate channel 34 and a second arcuate channel 35. The front disc 21 is provided with a connecting groove 24, and the multiple connecting grooves 24 are distributed along the circumferential direction, so that part of the liquid in the diffuser 30 flows back to the impeller flow channel outlet of the impeller 20 through the return channel and the connecting groove 24.

[0026] The present invention utilizes the design of the reflux channel and the connecting groove 24 to allow part of the liquid in the diffuser 30 to flow back to the impeller flow channel outlet of the impeller 20 through the reflux channel and the connecting groove 24, thereby effectively reducing pressure fluctuations, reducing pressure losses, and reducing vibrations, thereby improving the hydraulic performance and stability of the delivery pump.

[0027] Furthermore, a guide vane 36 is provided in the first arc-shaped channel 34 , and a plurality of guide vanes 36 are distributed along the circumferential direction. The circumferential extension range of the first arc-shaped channel 34 is 360°; the second arc-shaped channel 35 is a plurality of arc-shaped channels distributed along the circumferential direction.

[0028] The connecting grooves 24 are multiple connecting grooves distributed along the circumferential direction. The radial dimension from the inner end of the connecting groove 24 to the impeller rotation axis is roughly equal to the radial dimension from the inner end of the return channel to the impeller rotation axis. The outer end of the connecting groove 24 extends to the outer periphery of the front disk 21 or the blade 23.

[0029] The guide vane 36 has an upstream edge 37 and a downstream edge 38. The upstream edge 37 is designed as a corrugated concave-convex structure and is substantially flush with the inner surface of the second sidewall 32. By designing the upstream edge 37 as a corrugated concave-convex structure, the present invention can promote the flow of liquid from the diffuser 30 into the return channel.

[0030] The blade 23 has an outer peripheral edge 25, and the diffuser 30 has an inner peripheral edge 39, which is located radially outside the outer peripheral edge 25. The angle a between the downstream edge 38 and the inner peripheral edge 39 is 155-175°, preferably 165°, and the circumferential coverage angle of the return flow channel is 155-165°.

[0031] When viewed from an axial perspective, the communicating groove 24 is rectangular or U-shaped.

[0032] As shown in Figure 4, the radius of the curved wall of the first curved channel 34 is equal to that of the second curved channel 35, the axial dimension of the outlet of the impeller flow channel is equal to the axial dimension of the inlet of the diffuser flow channel, the angle between the upstream edge 37 and the inner peripheral edge 39 is 100-110°, and the radius of the bottom curved surface of the connecting groove 24 is equal to that of the curved wall of the second curved channel 35.

[0033] In one embodiment, the downstream edge 38 is also designed as a corrugated concave-convex structure. Preferably, the peak / trough height and width of the corrugations of the downstream edge 38 are greater than the peak / trough height and width of the corrugations of the upstream edge 37, which can further reduce the flow loss in the recirculation channel.

[0034] The arc-shaped transition portion 33 , the second side wall 32 and the volute 10 are integrally formed, and the first side wall 31 and the volute 10 are separate bodies.

[0035] A delivery pump for an ice-containing medium cleaning system of the present invention, through the design of a reflux channel and a connecting groove, allows part of the liquid in the diffuser to flow back to the impeller flow channel outlet of the impeller through the reflux channel and the connecting groove, which can effectively reduce pressure fluctuations, reduce pressure losses, and reduce vibrations, thereby improving the hydraulic performance and stability of the delivery pump.

[0036] The above-mentioned embodiments are illustrative of the present invention, not limiting thereof. It is understood that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A delivery pump for an ice-containing medium cleaning system, comprising a volute (10), an impeller (20), a diffuser (30), and a rotating shaft (40), wherein the impeller is installed in a volute cavity, the volute has a pressure water chamber (11), the impeller is installed on the rotating shaft, and the diffuser is arranged between the outer periphery of the impeller and the pressure water chamber; the impeller is a centrifugal impeller, the impeller comprises a front disk (21), a rear disk (22), and blades (23), a plurality of blades are distributed along the circumferential direction and connected between the front disk and the rear disk; the diffuser is a channel diffuser or a bladeless diffuser, the diffuser comprises a first side wall (31) and a second side wall (32), the first side wall is arranged radially corresponding to the rear position, and the second side wall is arranged radially corresponding to the front disk position; the characteristics are as follows: The second side wall (32) includes an arc-shaped transition portion (33), the arc-shaped transition portion forms a reflux channel, the reflux channel includes a first arc-shaped channel (34) and a second arc-shaped channel (35), a connecting groove (24) is provided on the front disk, and the plurality of connecting grooves are distributed along the circumferential direction, so that part of the liquid in the diffuser flows back to the impeller flow channel outlet of the impeller through the reflux channel and the connecting groove.

2. A delivery pump for an ice-containing medium cleaning system according to claim 1, characterized in that: A guide vane (36) is provided in the first arc-shaped channel (34), and a plurality of guide vanes are distributed along the circumferential direction. The circumferential extension range of the first arc-shaped channel is 360°; the second arc-shaped channel (35) is a plurality of arc-shaped channels distributed along the circumferential direction.

3. A delivery pump for an ice-containing medium cleaning system according to claim 2, characterized in that: The connecting grooves (24) are a plurality of connecting grooves distributed along the circumferential direction, the radial dimension from the inner end of the connecting groove to the impeller rotation axis is substantially equal to the radial dimension from the inner end of the return channel to the impeller rotation axis, and the outer end of the connecting groove extends to the front disk or the outer periphery of the blade.

4. A delivery pump for an ice-containing medium cleaning system according to claim 3, characterized in that: The guide plate (36) has an upstream edge (37) and a downstream edge (38); the upstream edge is designed to be a corrugated concave-convex structure; and the upstream edge is substantially flush with the inner side surface of the second side wall.

5. A delivery pump for an ice-containing medium cleaning system according to claim 4, characterized in that: The blade has an outer peripheral edge (25), the diffuser has an inner peripheral edge (39), the inner peripheral edge is located radially outside the outer peripheral edge, the angle a between the downstream edge and the inner peripheral edge is 155-175°, and the circumferential coverage angle of the reflow channel is 150-170°.

6. A delivery pump for an ice-containing medium cleaning system according to claim 5, characterized in that: When viewed from an axial perspective, the connecting groove (24) is rectangular or U-shaped; the radius of the arcuate wall of the first arcuate channel (34) and the second arcuate channel (35) are equal, the outlet axial dimension of the impeller flow channel is equal to the inlet axial dimension of the diffuser flow channel, the angle between the upstream edge (37) and the inner peripheral edge (39) is 100-110°, and the bottom arcuate surface of the connecting groove and the radius of the arcuate wall of the second arcuate channel are equal.

7. A delivery pump for an ice-containing medium cleaning system according to claim 6, characterized in that: The downstream edge (38) is also designed to be a corrugated concave-convex structure, and the height and width of the crest or trough of the corrugation of the downstream edge are greater than the height and width of the crest or trough of the corrugation of the upstream edge (37).

8. A delivery pump for an ice-containing medium cleaning system according to claim 5 or 6, characterized in that: The arc-shaped transition portion (33), the second side wall (32) and the volute are integrally formed, and the first side wall (31) and the volute are separate bodies.

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