CN220539947U

CN220539947U - Centrifugal water pump

Info

Publication number: CN220539947U
Application number: CN202321792530.5U
Authority: CN
Inventors: 王伟勇
Original assignee: Yongkang Haokai Garden Tools Co ltd
Current assignee: Yongkang Haokai Garden Tools Co ltd
Priority date: 2023-03-27
Filing date: 2023-07-07
Publication date: 2024-02-27
Anticipated expiration: 2033-07-07

Abstract

The utility model discloses a centrifugal water pump, which comprises a pump shell and an impeller, wherein the pump shell comprises a volute and a housing; the volute is provided with a water inlet pipeline and a water outlet pipeline, the volute defines a cavity with an opening at the rear end, and an annular boss is arranged in the center of the cavity; the housing cover is buckled on the rear end opening of the volute, the housing comprises a side peripheral wall, the front end of the side peripheral wall is provided with an assembly wall, the center of the assembly wall is provided with an installation seat, an axial through hole is formed in the installation seat, and the inner end surface of the assembly wall comprises an inner peripheral area close to the axial through hole and an outer peripheral area far away from the axial through hole; the inner peripheral area is arranged opposite to the annular boss and jointly defines an operation space for the operation of the impeller; the peripheral area and the volute together define a volute runner which is positioned at the periphery of the annular boss and the impeller and is communicated with the water inlet pipeline and the water outlet pipeline. According to the centrifugal water pump disclosed by the utility model, through optimizing the structures of the volute and the housing, the requirement of pressurized water flow of the water pump is met, the internal structure of the volute is simplified, and casting molding is facilitated.

Description

Centrifugal water pump

Technical Field

The utility model belongs to the technical field of water pumps, and particularly relates to a centrifugal water pump.

Background

The centrifugal water pump is generally composed of a pump shell, an impeller and a power mechanism, wherein the impeller is assembled in the pump shell, after water enters the pump shell, the water is driven by the impeller to make spiral movement from the center to the edge of the impeller, the direction is continuously changed, the pressure and the speed are continuously improved from inside to outside, and finally the water leaves the impeller from the tangential direction of the edge of the impeller to enter a volute channel, and then is output by a water outlet pipeline. The centrifugal pump shell is composed of a housing and a volute, the housing and the volute are matched to form a cavity, a volute runner and an operating cavity for the impeller to operate are arranged in the cavity, the volute runner and the operating cavity are both arranged in the volute, the volute runner is arranged on the periphery of the operating cavity and separated by a surrounding wall, a plurality of overflow holes communicated with the volute runner are required to be formed in the circumferential direction of the surrounding wall in order to enable water to enter the volute runner from the operating cavity, the structure of an internal pore channel of the volute is complex, the manufacturing process is complex, and the product quality cannot be guaranteed.

Disclosure of Invention

The utility model provides a centrifugal water pump, which aims at the problems of complex volute structure and complex manufacturing process of the centrifugal water pump in the prior art.

The utility model aims at realizing the following technical scheme:

a centrifugal water pump comprises a pump shell and an impeller arranged in the pump shell, wherein the pump shell comprises a volute and a housing; the volute is provided with a water inlet pipeline positioned on the front end wall of the volute and a water outlet pipeline positioned on the side surrounding wall of the volute, the volute defines a cavity with an opening at the rear end, and an annular boss is arranged in the center of the cavity; the housing cover is buckled on the rear end opening of the volute, the housing comprises a side peripheral wall, the front end of the side peripheral wall is provided with an assembly wall positioned in the chamber, the center of the assembly wall is provided with an installation seat for installing the impeller, the installation seat is provided with an axial through hole, and the inner end surface of the assembly wall comprises an inner peripheral area close to the axial through hole and an outer peripheral area far away from the axial through hole; the inner peripheral area and the annular boss are arranged oppositely and jointly define an operation space for the operation of the impeller; the peripheral area and the volute together define a volute runner which is positioned at the periphery of the annular boss and the impeller and is communicated with the water inlet pipeline and the water outlet pipeline.

Preferably, the tail end of the water outlet pipeline is provided with a transition wall extending into the volute flow channel, the transition wall is connected between the volute side surrounding wall and the annular boss, and the transition wall is provided with an arc-shaped end face and a straight end face perpendicular to the liquid outlet direction. The arrangement of the transition wall can enable water in the volute flow channel to enter the water outlet pipeline more smoothly.

Preferably, the peripheral region of the mounting wall is provided with an internal recess which is located on the extension of the inner wall of the water outlet conduit and which smoothly transitions with the transition wall. The arrangement of the concave part can reduce the pressure loss when water flows into the water outlet pipeline.

Preferably, a yielding groove for yielding the transition wall is formed in one side of the inner concave part, which is close to the water outlet pipeline, and an abutting edge is formed between the inner concave part and the yielding groove and abuts against the straight end face of the transition wall. The arrangement of the abdication groove can improve the matching degree of the concave part and the water outlet pipeline, and can be used as a positioning structure, so that the housing is convenient to position and assemble to the volute.

Preferably, the rear end of the side peripheral wall is provided with an abutment wall which extends radially outwardly of the side peripheral wall and abuts against the rear end wall of the scroll casing. The provision of the abutment wall enables axial positioning of the casing when the casing is assembled to the volute.

Preferably, the outer contour of the side surrounding wall of the volute is elliptical, a plurality of assembling tables are arranged in the side surrounding wall in a protruding mode, the outer contour of the side surrounding wall of the housing is matched with the inner contour of the side surrounding wall of the volute, and a plurality of grooves for giving way to the assembling tables are concavely formed in the side surrounding wall. The outer contours of the volute and the housing adopt ellipses, and compared with the circular contour, the mounting direction of the volute and the housing are limited, so that the assembly is more convenient, the assembly table can act as an assembly structure to improve the structural strength of the whole pump housing, and can also be used as a positioning structure to be matched with the groove, so that the housing and the volute can be conveniently mounted and positioned.

Preferably, the assembly tables are arc-shaped tables and are uniformly arranged at intervals along the circumferential direction of the side surrounding walls; the butt wall is provided with a plurality of assembly petals corresponding to the assembly tables one by one, and the assembly tables and the assembly petals are provided with assembly holes for installing fasteners. The assembly table adopts an arc-shaped structure, so that the flow resistance of water flow in the volute flow channel can be reduced, and the pressure loss of the water flow is reduced.

Preferably, the annular boss, the water inlet pipeline and the blades are coaxially arranged, the annular boss is connected behind the water inlet pipeline, and the aperture of a central hole of the annular boss is consistent with the pipe diameter of the water inlet pipeline. By the arrangement, the resistance of water entering the pump shell can be reduced, the pressure loss of the water entering the running space of the impeller can be reduced, and the water flow pressurization is more efficient.

Preferably, the rotation direction of the impeller is consistent with the flow direction of the water flow in the volute flow channel. The arrangement can enable the water flow to flow in the volute flow channel more smoothly.

Preferably, the mounting seat is provided with a plurality of reinforcing ribs connected to the side peripheral wall of the housing at intervals in the circumferential direction; and a plurality of reinforcing ribs connected to the side surrounding wall of the volute are arranged at intervals in the circumferential direction of the water inlet pipe.

Preferably, the volute is cast integrally with the housing.

Compared with the prior art, the utility model has the following beneficial effects: the running space of the impeller and the volute flow channel are defined by the cooperation of the housing and the volute, so that the internal structure of the volute is simplified, and the internal pore channel of the volute is simple in structure and convenient to cast; the assembly wall arranged on the housing extends into the volute cavity, the inner peripheral area of the assembly wall is matched with the annular boss to define the running space of the impeller, the volute of the outer peripheral area of the assembly wall is defined into a volute runner, and meanwhile, the condition that the volute runner is positioned at the periphery of the running space of the impeller and is communicated with the impeller is met, so that the centrifugal pump can pressurize water flow; the assembly wall is provided with the concave part and the abdication groove, and the tail end of the water outlet pipeline is provided with the transition wall, so that water in the volute type flow channel can more smoothly enter the water outlet pipeline, the water flow pressure loss is reduced, the assembly wall can also serve as a positioning structure, and the housing can be conveniently positioned and assembled to the volute.

Drawings

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

FIG. 2 is a schematic view of the internal structure of the scroll casing according to the present utility model;

FIG. 3 is a schematic view of the housing and impeller of the present utility model;

FIG. 4 is a schematic view of the back structure of the present utility model;

the marks in the figure: a volute 10; a water inlet pipe 11; a water outlet pipe 12; a scroll-type flow path 13; an annular boss 14; a transition wall 15; a front end wall 16; a side wall 17; an assembly station 18; a reinforcing rib 19; a housing 20; side peripheral walls 21; a groove 211; a fitting wall 22; a recess 221; a relief groove 222; an abutment edge 223; an abutment wall 23; fitting petals 231; a mounting base 24; reinforcing ribs 25; an impeller 30.

Detailed Description

The utility model is further described below with reference to embodiments shown in the drawings in which:

as shown in fig. 1 to 4, the present embodiment discloses a centrifugal water pump, which includes a pump casing and an impeller 30 provided in the pump casing, the impeller 30 is driven by a power mechanism outside the pump casing, the pump casing includes a volute 10 and a casing 20 covered on the volute 10, and the volute 10 and the casing 20 are molded by casting in a single body.

The volute 10 is provided with a water inlet pipeline 11 positioned on the front end wall 16 and a water outlet pipeline 12 positioned on the side wall 17, the volute 10 defines a cavity with an opening at the rear end, and an annular boss 14 is arranged in the center of the cavity; the housing 20 is covered and buckled on the rear end opening of the volute 10, the housing 20 comprises a side peripheral wall 21, the front end of the side peripheral wall 21 is provided with an assembly wall 22 positioned in the chamber, the center of the assembly wall 22 is provided with an installation seat 24 for installing an impeller 30, the installation seat 24 is provided with an axial through hole, and the inner end surface of the assembly wall 22 comprises an inner peripheral area close to the axial through hole and an outer peripheral area far away from the axial through hole; the inner peripheral area is arranged opposite to the annular boss 14 and jointly defines an operation space for the impeller 30 to operate; the peripheral area and the volute 10 together define a volute runner 13, and the volute runner 13 is positioned at the periphery of the annular boss 14 and the impeller 30 and is communicated with the water inlet pipeline 11 and the water outlet pipeline 12; the rear end of the side peripheral wall 21 is provided with an abutment wall 23, and the abutment wall 23 extends radially outwardly of the side peripheral wall 21 and abuts against the rear end wall of the scroll casing 10.

The annular boss 14, the water inlet pipeline 11 and the blades are coaxially arranged, the annular boss 14 is connected behind the water inlet pipeline 11, and the aperture of a central hole of the annular boss 14 is consistent with the diameter of the water inlet pipeline 11, so that the resistance of water entering the pump shell is reduced, the pressure loss of the water entering the running space of the impeller 30 is reduced, and the water flow pressurization is more efficient; in order to make the flow of the water in the scroll-type flow channel 13 smoother, the rotation direction of the impeller 30 is the same as the flow direction of the water in the scroll-type flow channel 13, and both directions are clockwise.

The tail end of the water outlet pipeline 12 is provided with a transition wall 15 extending into the volute flow channel 13, the transition wall 15 is connected between the side surrounding wall 17 of the volute 10 and the annular boss 14 and is provided with an arc end face and a straight end face perpendicular to the liquid outlet direction, and the arrangement of the transition wall 15 can enable water in the volute flow channel 13 to enter the water outlet pipeline 12 more smoothly; the peripheral area of the assembly wall 22 is provided with an inner concave part 221, the inner concave part 221 is positioned on the extension surface of the inner wall of the water outlet pipeline 12 and is in smooth transition with the transition wall 15, and the arrangement of the inner concave part 221 can reduce the pressure loss when water flows into the water outlet pipeline 12; the inner concave part 221 is provided with a yielding groove 222 for yielding the transition wall 15 on one side close to the water outlet pipeline 12, an abutting edge 223 is formed between the inner concave part 221 and the yielding groove 222, the abutting edge 223 abuts against the straight end surface of the transition wall 15, and the yielding groove 222 can improve the matching degree of the inner concave part 221 and the water outlet pipeline 12 and can be matched with the transition wall 15 to serve as a positioning structure, so that the housing 20 is conveniently positioned and assembled to the volute 10.

The outer contour of the side surrounding wall 17 of the volute 10 is elliptical, a plurality of assembling tables 18 are arranged in the side surrounding wall 17 in a protruding mode, the outer contour of the side surrounding wall 21 of the housing 20 is matched with the inner contour of the side surrounding wall 17 of the volute 10, a plurality of grooves 211 for giving way to the assembling tables 18 are formed in the concave mode on the side surrounding wall 21, the outer contours of the volute 10 and the housing 20 are elliptical, compared with the circular contour, the mounting positions of the volute 10 and the housing 20 are limited, the assembling is more convenient, the assembling tables 18 can serve as an assembling structure to improve the structural strength of the whole pump shell, and can serve as a positioning structure to be matched with the grooves 211, so that the housing 20 and the volute 10 can be mounted and positioned conveniently; the flow resistance of water flow in the volute flow channel 13 is reduced, the water flow pressure loss is reduced, the assembling table 18 is an arc table and is uniformly arranged along the circumferential direction of the side wall 17 at intervals, a plurality of assembling petals 231 which are in one-to-one correspondence with the assembling table 18 are arranged on the abutting wall 23, and assembling holes for mounting bolts are formed in the assembling table 18 and the assembling petals 231.

To enhance the structural strength of the scroll casing 10, the mounting base 24 is provided with a plurality of reinforcing ribs 25 connected to the side peripheral wall 21 of the casing 20 at intervals in the circumferential direction; the inlet pipe is provided with a plurality of reinforcing ribs 19 at intervals in the circumferential direction, which are connected to the side wall 17 of the volute 10.

It should be understood that in the claims, the specification of the present utility model, all "including … …" should be interpreted as open-ended meaning that it is equivalent to "at least … …", and not as closed-ended meaning that it should not be interpreted to "include … …" only. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The above description is merely an embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and those skilled in the art should appreciate variations, modifications, additions or substitutions within the spirit of the present utility model.

Claims

1. A centrifugal water pump comprises a pump shell and an impeller arranged in the pump shell, wherein the pump shell comprises a volute and a housing; the spiral case is characterized by comprising a water inlet pipeline positioned on the front end wall of the spiral case and a water outlet pipeline positioned on the side surrounding wall of the spiral case, wherein the spiral case defines a cavity with an opening at the rear end, and an annular boss is arranged in the center of the cavity; the housing cover is buckled on the rear end opening of the volute, the housing comprises a side peripheral wall, the front end of the side peripheral wall is provided with an assembly wall positioned in the cavity, the center of the assembly wall is provided with an installation seat for installing the impeller, the installation seat is provided with an axial through hole, and the inner end surface of the assembly wall comprises an inner peripheral area close to the axial through hole and an outer peripheral area far away from the axial through hole; the inner peripheral area and the annular boss are arranged oppositely and jointly define an operation space for the operation of the impeller; the peripheral area and the volute together define a volute runner which is positioned at the periphery of the annular boss and the impeller and is communicated with the water inlet pipeline and the water outlet pipeline.

2. A centrifugal water pump according to claim 1, wherein the tail end of the water outlet conduit has a transition wall extending into the volute flow passage, the transition wall being engaged between the volute side wall and the annular boss and having an arcuate end face and a straight end face perpendicular to the liquid outlet direction.

3. A centrifugal water pump according to claim 2, wherein the peripheral area of the fitting wall is provided with an internal recess which is located on the extension of the inner wall of the water outlet conduit and which is smoothly transiting with the transition wall.

4. A centrifugal water pump according to claim 3, wherein a relief groove for relieving the transition wall is provided on a side of the recess adjacent to the outlet pipe, and an abutment edge is formed between the recess and the relief groove, and the abutment edge abuts against the straight end surface of the transition wall.

5. A centrifugal water pump according to claim 1, wherein the rear end of the side peripheral wall is provided with an abutment wall extending radially outwardly of the side peripheral wall and abutting against the rear end wall of the volute.

6. The centrifugal water pump according to claim 5, wherein the peripheral wall of the volute is oval in shape, a plurality of assembling tables are arranged in the peripheral wall in a protruding mode, the peripheral wall of the housing is matched with the inner peripheral wall of the volute in the peripheral wall, and a plurality of grooves for giving way to the assembling tables are formed in the peripheral wall in a concave mode.

7. The centrifugal water pump according to claim 6, wherein the assembling tables are arc-shaped tables and are uniformly arranged at intervals along the circumferential direction of the side surrounding walls; the butt wall is provided with a plurality of assembly petals corresponding to the assembly tables one by one, and the assembly tables and the assembly petals are provided with assembly holes for installing fasteners.

8. A centrifugal water pump according to any one of claims 1-7, wherein the annular boss, the water inlet pipe and the vanes are coaxially arranged, the annular boss is connected behind the water inlet pipe, and the aperture of the central hole of the annular boss is consistent with the pipe diameter of the water inlet pipe.

9. A centrifugal water pump according to claim 1, wherein the direction of rotation of the impeller coincides with the direction of flow of water in the volute flow channel.

10. The centrifugal water pump according to claim 1, wherein the mount is provided with a plurality of reinforcing ribs at intervals in a circumferential direction, the reinforcing ribs being connected to a side circumferential wall of the housing; and a plurality of reinforcing ribs connected to the side surrounding wall of the volute are arranged at intervals in the circumferential direction of the water inlet pipe.