CN214424711U

CN214424711U - Miniature centrifugal pump with arc blade

Info

Publication number: CN214424711U
Application number: CN202023322227.8U
Authority: CN
Inventors: 李典; 夏长植
Original assignee: Zhejiang Kebo Electrical Appliances Co ltd
Current assignee: Zhejiang Kebo Electrical Appliances Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-19
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a miniature centrifugal pump with arc blades, which comprises an integrated front cover and an integrated rear cover which are arranged from top to bottom and enclose an airtight space, a water inlet, a water outlet, a separation disc which is positioned between the integrated front cover and the integrated rear cover and is separated into an upper airtight space and a lower airtight space, an outer rotor component which is positioned in the lower airtight space, an inner rotor component which is positioned in the upper airtight space and synchronously rotates with the outer rotor through magnetic force, an impeller which is coated on the inner rotor component and synchronously rotates with the inner rotor, and a motor component which is used for driving the outer rotor component to rotate; the blades of the impeller are arc blades distributed clockwise, the blades are perpendicular to the water inlet plane of the impeller, the motor assembly is started to drive the outer rotor assembly to rotate, the inner rotor assembly and the impeller are driven to rotate synchronously through magnetic force, fluid enters the upper closed space, flows into the middle of the impeller, is rotated and centrifuged to the outer side of the impeller through the blades and flows out of the water outlet. The utility model discloses the power consumption ratio is effectively promoted, has reduced the phenomenon of taking off a class, and the fluid flows more steadily.

Description

Miniature centrifugal pump with arc blade

Technical Field

The utility model relates to a centrifugal pump especially relates to a miniature centrifugal pump of circular arc blade.

Background

At present, a micro centrifugal pump is commonly used for power supply and water supply equipment in an electric kettle, most of blades of the micro pump are of a straight plate type, and the blades are driven to synchronously rotate through rotation of a motor shaft, so that water in a water inlet chamber close to an inlet of the blades is thrown to an outlet of the blades through the action of centrifugal force. But because the micro pump has low power and the running time of the device is short, the efficiency requirement is not high. Also, from a fluid point of view, the flow characteristics of straight vanes in micropumps are poor, and the efficiency near the point of highest efficiency is low compared to other types of vanes. And the flow channel of the straight plate type impeller is seriously diffused, and under the normal working condition, the fluid is easy to generate backflow and defluidization at the inlet and the outlet, so that the loss is increased, and the efficiency is reduced. And the fluid has larger Reynolds number, which causes the fluid fluidity at the outlet of the water pump to be disturbed.

Thus, there is a need to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a can effectively promote the miniature centrifugal pump of circular arc blade of power consumption ratio.

The technical scheme is as follows: in order to achieve the purpose, the utility model discloses a miniature centrifugal pump with arc blades, which comprises an integrated front cover and an integrated rear cover which are arranged from top to bottom and enclose an airtight space, a water inlet positioned at the center above the integrated front cover, a water outlet positioned on the side wall of the integrated front cover, a separation disc positioned between the integrated front cover and the integrated rear cover and separated into an upper airtight space and a lower airtight space, an outer rotor component positioned in the lower airtight space, an inner rotor component positioned in the upper airtight space and synchronously rotating with the outer rotor through magnetic force, an impeller coated on the inner rotor component and synchronously rotating with the inner rotor, and a motor component for driving the outer rotor component to rotate; the blades of the impeller are arc blades distributed clockwise, the blades are perpendicular to the water inlet plane of the impeller, the motor assembly is started to drive the outer rotor assembly to rotate, the inner rotor assembly and the impeller are driven to rotate synchronously through magnetic force, fluid enters the upper closed space from the water inlet, flows into the middle of the impeller, is rotated and centrifuged to the outer side of the impeller through the blades, and flows out from the water outlet.

The motor assembly comprises a motor protective shell, a motor, a shaft sleeve and a wire harness, wherein the motor protective shell is connected with the connected rear cover in a sealing mode through a motor sealing ring, the motor is positioned in the motor protective shell, the shaft sleeve is in interference fit with a motor output shaft and is connected with the outer rotor assembly, and the wire harness is connected with an external circuit.

Preferably, the outer rotor assembly comprises an outer rotor gasket and an outer rotor, the outer rotor gasket is connected with the output shaft of the motor assembly, and fixing claws for positioning the outer rotor extend out of the outer circle of the outer rotor gasket and are fixed through gluing.

Moreover, a stainless steel shaft for penetrating the inner rotor assembly is arranged in the center of the isolation disc in a penetrating mode.

Further, the inner rotor assembly comprises an inner rotor cladding shell in clearance fit with the stainless steel shaft, and an inner rotor gasket which are cladded in the inner rotor cladding shell, wherein the impeller is cladded on the inner rotor cladding shell.

And moreover, an O-shaped ring for sealing is arranged at the assembly position of the connected front cover and the connected rear cover.

Preferably, the blade wrap angle is 5 to 20 °.

Further, the blades are backward-facing blades.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following: firstly, the utility model provides power through the motor component, after the motor is electrified, the outer rotor component starts to rotate, the outer rotor and the inner rotor realize synchronous rotation through magnetic force, and the inner rotor component is coated by the impeller to realize synchronous rotation of the impeller; secondly, blades on the impeller are arc-shaped blades, a relatively sealed space is formed between the blades and the connected front cover, radial force is applied to fluid close to the water inlet, the fluid is thrown to a blade water outlet by the action of centrifugal force, and certain pressure is increased; the pressure of the blades flowing through the surfaces of the blades under a normal working condition forms an acute angle with the movement direction of the blades, so that more force is effective force, the power consumption ratio is effectively improved compared with the conventional straight plate type structure, the control capability of the arc-shaped blades on water is enhanced when the water is conveyed in a pressurized water chamber, the phenomenon of flow separation is reduced, and the fluid flows out more stably; finally the utility model discloses the cornerite of well blade adopts the design of parcel angle, effectively overcomes the too big phenomenon such as blade overlength that leads to of cornerite and fluidic friction loss increase to obtain good performance.

Drawings

Fig. 1 is a schematic structural view of the present invention;

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

fig. 3 is a top view of the impeller of the present invention;

fig. 4 is a cross-sectional view of the present invention;

fig. 5 is a top view of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, fig. 4 and fig. 5, the utility model relates to a miniature centrifugal pump with arc blades, which comprises a conjoined front cover 1, a conjoined rear cover 2, a water inlet 3, a water outlet 4, a separation disc 5, an outer rotor component, an inner rotor component, an impeller 6 and a motor component.

The upper part and the lower part of the conjoined front cover 1 and the conjoined rear cover 2 are arranged to enclose a closed space and are connected through a bolt, and an O-shaped ring 18 for sealing is arranged at the assembly part of the conjoined front cover 1 and the conjoined rear cover 2; the separation disc 5 is positioned between the conjoined front cover 1 and the conjoined rear cover 2 and is divided into an upper closed space and a lower closed space, a stainless steel shaft 14 used for penetrating the inner rotor assembly is arranged at the center of the separation disc 5 in a penetrating way, the tail end of the stainless steel shaft 14 is provided with a pattern surface matched with the separation disc 5, and the separation disc is an injection molding piece formed by an intramembrane injection molding process.

The water inlet 3 is positioned at the center of the upper part of the conjoined front cover, the water inlet 3 is vertically and upwards arranged, the water outlet 4 is positioned on the side wall of the conjoined front cover, and the water outlet 4 is horizontally arranged.

The outer rotor assembly is positioned in the lower closed space and comprises an outer rotor gasket 12 and an outer rotor 13, and fixing claws for positioning the outer rotor extend out of the outer circle of the outer rotor gasket 12 and are fixed by gluing; the outer rotor gasket 12 is connected with the output shaft of the motor assembly.

The inner rotor subassembly is located last airtight space, and the inner rotor subassembly passes through magnetic force and outer rotor synchronous revolution, and the inner rotor subassembly includes inner rotor cladding shell 15, inner rotor 16 and inner rotor gasket 17, and inner rotor cladding shell 15 and the 14 clearance fit of stainless steel shaft, inner rotor 16 and inner rotor gasket 17 are by the cladding of inner rotor cladding shell 15, and inner rotor cladding shell 15 is by the impeller cladding.

As shown in fig. 2 and 3, the impeller 6 is coated on the inner rotor assembly and rotates synchronously with the inner rotor, the blades of the impeller 6 are arc-shaped blades distributed clockwise, the wrap angle of the blades is 5 degrees to 20 degrees, the blades are backward-shaped blades, the blades are perpendicular to the water inlet plane of the impeller, the moving direction of the fluid in operation is approximately radial, and the axial force applied to the impeller is small.

The motor assembly is used for driving the outer rotor assembly to rotate and comprises a motor sealing ring 7, a motor protective shell 8, a motor 9, a shaft sleeve 10 and a wire harness 11. Motor protective housing 8 is through motor sealing washer 7 and 2 looks sealing connection behind disjunctor, and motor protective housing 8 is used for preventing that the motor from meeting water and heat-resisting. The motor is arranged in the motor protection outer 8, the shaft sleeve 10 is in interference fit with the motor output shaft and is connected with an outer rotor gasket of the outer rotor assembly, and the wire harness is connected with an external circuit. The motor protective shell 8 and the connected rear cover 2 are assembled through screws, and the connected rear cover 2 is provided with two mounting holes.

The utility model discloses well motor element starts the rotation of drive external rotor, drives inner rotor subassembly and impeller synchronous revolution through magnetic force, and in the fluid got into airtight space from the water inlet, flow into the impeller in the middle of through the rotatory centrifugation of blade to the impeller outside, when flow at the intracavity and be about to reach delivery port 4, the fluid outflow is divided between two blades to flow from the delivery port.

Example 1

As shown in fig. 1, 4 and 5, the arc-blade micro centrifugal pump in embodiment 1 includes an integrated front cover 1, an integrated rear cover 2, a water inlet 3, a water outlet 4, a separation disc 5, an outer rotor assembly, an inner rotor assembly, an impeller 6 and a motor assembly.

As shown in fig. 2 and 3, the impeller 6 is coated on the inner rotor assembly and rotates synchronously with the inner rotor, the blades of the impeller 6 are arc-shaped blades distributed clockwise, the wrap angle of the blades is 10 degrees, the blades are backward-shaped blades, the blades are perpendicular to the water inlet plane of the impeller, the moving direction of fluid in operation is approximately radial, and the axial force applied to the impeller is small. The performance of the blade with the blade wrap angle of 10 degrees is better, and the flow of the centrifugal pump is improved by about 10 percent.

Claims

1. The utility model provides a miniature centrifugal pump of circular arc blade which characterized in that: the device comprises a conjoined front cover (1) and a conjoined rear cover (2) which are arranged up and down to form a closed space, a water inlet (3) positioned at the center above the conjoined front cover, a water outlet (4) positioned on the side wall of the conjoined front cover, a separation disc (5) positioned between the conjoined front cover and the conjoined rear cover and separated into an upper closed space and a lower closed space, an outer rotor assembly positioned in the lower closed space, an inner rotor assembly positioned in the upper closed space and synchronously rotated with the outer rotor through magnetic force, an impeller (6) coated on the inner rotor assembly and synchronously rotated with the inner rotor, and a motor assembly used for driving the outer rotor assembly to rotate; the blades of the impeller (6) are arc blades distributed clockwise, the blades are perpendicular to the water inlet plane of the impeller, the motor assembly is started to drive the outer rotor assembly to rotate, the inner rotor assembly and the impeller are driven to rotate synchronously through magnetic force, fluid enters the upper closed space from the water inlet, flows into the middle of the impeller, is rotated and centrifuged to the outer side of the impeller through the blades and flows out from the water outlet.

2. The centrifugal micro-pump of claim 1, wherein: the motor assembly comprises a motor protective shell (8) which is connected with the conjoined rear cover in a sealing way through a motor sealing ring (7), a motor (9) which is positioned in the motor protective shell, a shaft sleeve (10) which is in interference fit with a motor output shaft and is connected with the outer rotor assembly, and a wire harness (11) which is connected with an external circuit.

3. The centrifugal micro-pump of claim 1, wherein: the outer rotor assembly comprises an outer rotor gasket (12) and an outer rotor (13), wherein the outer rotor gasket is connected with an output shaft of the motor assembly, and fixing claws for positioning the outer rotor extend out of the outer circle of the outer rotor gasket (12) and are fixed through gluing.

4. The centrifugal micro-pump of claim 1, wherein: and a stainless steel shaft (14) for penetrating the inner rotor assembly is arranged in the center of the isolation disc (5).

5. The centrifugal micro-pump of claim 4, wherein: the inner rotor assembly comprises an inner rotor coating shell (15) in clearance fit with the stainless steel shaft, and an inner rotor (16) and an inner rotor gasket (17) coated in the inner rotor coating shell, wherein the impeller (6) is coated on the inner rotor coating shell (15).

6. The centrifugal micro-pump of claim 1, wherein: and an O-shaped ring (18) for sealing is arranged at the assembly position of the conjoined front cover (1) and the conjoined rear cover (2).

7. The centrifugal micro-pump of claim 1, wherein: the wrap angle of the blade is 5-20 degrees.

8. The centrifugal micro-pump of claim 1, wherein: the blades are backward blades.