CN219993947U

CN219993947U - Centrifugal pump special for dish washer

Info

Publication number: CN219993947U
Application number: CN202321054216.7U
Authority: CN
Inventors: 刘建晟; 蒋昕
Original assignee: Leo Group Zhejiang Pump Co Ltd
Current assignee: Leo Group Zhejiang Pump Co Ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-11-10
Anticipated expiration: 2033-04-28

Abstract

The utility model belongs to the technical field of dish washing machine accessories, and relates to a special centrifugal pump for a dish washing machine, which comprises a motor, a pump body, a pump cover and an impeller, wherein the pump body is fixedly connected with the pump cover and forms a pump cavity for accommodating the impeller, the impeller is in transmission connection with a motor shaft of the motor, a front end cover of the motor is fixedly connected with the pump cover, a first sealing element is sleeved on a shaft section in the pump cover, a second sealing element is sleeved on a shaft section in the front end cover, and a flow guiding structure for prolonging the water flow distance is arranged on the front end surface of the front end cover. The special centrifugal pump for the dish washer has the advantages of simple structure, convenience in assembly, good sealing performance and good heat dissipation performance.

Description

Centrifugal pump special for dish washer

Technical Field

The utility model belongs to the technical field of dish washer accessories, and relates to a special centrifugal pump for a dish washer.

Background

The centrifugal pump is an indispensable accessory in dish washer, and the centrifugal pump of current dish washer prevents water leakage through a set of mechanical seal only, and when mechanical seal appears leaking, water enters into the motor end easily, influences motor life and even appears dangerous accident. In addition, the centrifugal pump of the dish washer generally works under the high-temperature environment, and the working water temperature is generally about 60 degrees, so that the heat dissipation problem of the motor is difficult to solve.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the special centrifugal pump for the dish washing machine, which has the advantages of simple structure, convenient assembly, good sealing performance and good heat dissipation performance.

In order to solve the technical problems, the aim of the utility model is realized by the following technical scheme:

the utility model provides a special centrifugal pump of dish washer, includes motor, pump body, pump cover and impeller, pump body and pump cover fixed connection and form the pump chamber that holds the impeller, the impeller is connected with the motor shaft transmission of motor, the front end housing and the pump cover fixed connection of motor, the cover is equipped with first sealing member on the axle section in the pump cover, the cover is equipped with the second sealing member on the axle section in the front end housing, the preceding terminal surface of front end housing is provided with the water conservancy diversion structure of extension rivers distance.

In the centrifugal pump special for the dish washer, the first sealing element is a mechanical seal, and the second sealing element is a framework oil seal.

In the above-mentioned special centrifugal pump of dish washer, the water conservancy diversion structure includes: the front end face of the front end cover surrounds the inner hole and is provided with a convex ring, and the outer edge of the convex ring and the front end face are in arc transition. Other structures, such as spiral channels, may be used for the flow directing structure; or using a wavy structure from inside to outside.

In the centrifugal pump special for the dish washer, a plurality of water outlet holes formed by hollows are formed between the front end cover and the pump cover, and the water outlet holes are arranged along the circumferential direction. Further, the water outlet hole is arranged at the rear end of the pump cover.

In the centrifugal pump special for the dish washer, the front end face of the front end cover is provided with the positioning ring, the outer wall surface of the positioning ring is in contact connection with the inner wall surface of the pump cover, and the positioning ring and the pump cover form an axial and radial positioning structure.

In the special centrifugal pump for the dish washer, the front end cover and the pump cover are fastened and connected through the fasteners circumferentially arranged, a plurality of installation angles are arranged between the front end cover and the pump cover, and a plurality of supporting platforms in different directions are arranged on the outer peripheral surfaces of the pump body and the pump cover. Further, the front end cover is provided with a mounting hole, the pump cover is provided with an internal thread column, and the fastening piece is a fastening bolt.

In the centrifugal pump special for the dish washer, a capacitor bracket is arranged on the outer side of the motor, an external capacitor is arranged on the capacitor bracket, and a gap is reserved between the external capacitor and a shell of the motor. Preferably, the capacitor is mounted laterally.

In the centrifugal pump special for the dish washer, a fan and a fan cover are arranged at the rear end of the motor, and the external capacitor is arranged opposite to an air outlet of the fan cover.

In the centrifugal pump special for the dish washer, the impeller is a semi-open impeller and comprises a rear cover plate and a plurality of blades which are spirally arranged, and cutting edges are arranged at the inner ends of the blades. Preferably, the cutting edge is arranged upwards.

In the centrifugal pump special for the dish washer, the water outlet of the pump body is provided with a plurality of inverted conical inverted structures, and the inverted structures are fixedly connected with the water outlet pipe.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model improves the sealing structure of the centrifugal pump of the dish washer, a second sealing element (such as a framework oil seal) is sleeved on the shaft section in the front end cover, and when in operation, the framework oil seal and the motor shaft form a sealing structure, and when a small amount of liquid leaks, the framework seal can prevent the liquid from entering the motor. Meanwhile, the flow guide structure is arranged on the front end cover, so that the flowing distance of liquid can be prolonged, and the liquid is evaporated by utilizing heat generated by the motor. In addition, the flow guiding structure increases the heat radiating area of the front end cover, and can also take away the heat of the motor in the process of liquid evaporation, so that a better heat radiating effect is obtained.

2. The utility model improves the capacitor structure of the motor, and the capacitor is externally arranged through the capacitor bracket, so that the heat dissipation of the capacitor is facilitated, and meanwhile, the capacitor can also be used as a temporary handle, thereby facilitating the production and the field installation of customers.

3. The utility model improves the structure of the impeller, and forms a structure of a miniature blade by arranging the cutting edge on the blade of the impeller, so that the impeller can cut food residues left in the dish washer when running at high speed, and the semi-open impeller can also increase the passing rate of the food residues, thereby efficiently discharging the residues out of the pump.

4. The water pump and the motor can select the installation direction, and the outlet direction of the water pump can be changed at will according to the requirements of customers through the conversion between different installation sites.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a perspective view of the front end cap of the present utility model;

FIG. 4 is a perspective view of an impeller of the present utility model;

reference numerals: 1. a motor; 2. a pump body; 3. a pump cover; 4. an impeller; 5. a motor shaft; 6. a front end cover; 7. mechanical sealing; 8. a framework oil seal; 9. a convex ring; 10. a water outlet hole; 11. a positioning ring; 12. a fastener; 13. a support platform; 14. a capacitor bracket; 15. an external capacitor; 16. a fan; 17. a fan housing; 18. a back cover plate; 19. a blade; 20. a cutting edge; 21. a water outlet; 22. and a back-off structure.

Detailed Description

The utility model is further described in the following by way of specific embodiments with reference to the accompanying drawings, see fig. 1-4:

the utility model provides a special centrifugal pump of dish washer, includes motor 1, pump body 2, pump cover 3 and impeller 4, pump body 2 and pump cover 3 fixed connection and form the pump chamber that holds impeller 4, impeller 4 and motor 1 axle transmission of motor 1 are connected, the front end housing 6 and the pump cover 3 fixed connection of motor 1, the cover is equipped with mechanical seal 7 on the axle section in the pump cover 3, the cover is equipped with skeleton oil blanket 8 on the axle section in the front end housing 6, the front end face of front end housing 6 is provided with the water flow distance's of extension water conservancy diversion structure. The mechanical seal 7 and the framework oil seal 8 cooperate to prevent liquid leakage, thereby having a double seal structure.

Referring to fig. 3, the above-mentioned flow guiding structure includes: the preceding terminal surface of front end housing 6 encircles the hole and is provided with bulge loop 9, bulge loop 9's outer edge becomes the arc excessively with the preceding terminal surface, through the setting of above-mentioned water conservancy diversion structure, can increase the radiating area of front end housing 6, when the leakage water flows along the preceding terminal surface, can prolong the flow distance of rivers, utilizes motor 1 heat, at the in-process of extension flow distance, can evaporate water, takes away motor 1 heat. Other structures, such as spiral channels, may be used for the flow directing structure; or using a wavy structure from inside to outside. The flow guide structures can also prolong the flow passage distance of water flow, and have similar technical effects as the convex ring.

When the leakage water is excessive, the leakage water is not evaporated on the front end cover 6, and the leakage water can be discharged by the following structure: a plurality of water outlet holes 10 formed by hollows are formed between the front end cover 6 and the pump cover 3, and the water outlet holes 10 are arranged along the circumferential direction. Further, the water outlet hole 10 is arranged at the rear end of the pump cover 3.

In the embodiment, a positioning structure is added on the front end cover 6 of the motor 1, a positioning ring 11 is arranged on the front end surface of the front end cover 6, the outer wall surface of the positioning ring 11 is in contact connection with the inner wall surface of the pump cover 3, and the positioning ring 11 and the pump cover 3 form an axial and radial positioning structure. The positioning structure can effectively reduce the requirement on screw strength, is convenient for mass production and installation, and reduces the assembly difficulty of production assembly staff.

The front end cover 6 and the pump cover 3 are fastened and connected through a plurality of fasteners 12 which are circumferentially arranged, a plurality of installation angles are formed between the front end cover 6 and the pump cover 3, and a plurality of supporting platforms 13 with different orientations are arranged on the peripheral surfaces of the pump body 2 and the pump cover 3. Further, the front end cover 6 is provided with a mounting hole, the pump cover 3 is provided with an internal thread column, and the fastening piece 12 is a fastening bolt. In this embodiment, 4 mounting holes and 4 internal threaded posts are provided in total, and the mounting position can be changed by matching between different mounting holes and different internal threaded posts, and in the embodiment, the mounting direction can be changed once every ninety degrees of relative rotation, so that different outlet directions of the pump can be adjusted. Different support platforms 13 can be used in cooperation with different outlet directions of the pump, making the pump more stable.

The outside of above-mentioned motor 1 is provided with electric capacity support 14, install external electric capacity 15 on the electric capacity support 14, leave the clearance between external electric capacity 15 and the shell of motor 1. Preferably, the capacitor is mounted laterally.

Further, in order to obtain a better heat dissipation effect, a fan 16 and a fan cover 17 are disposed at the rear end of the motor 1, and the external capacitor 15 is disposed opposite to the air outlet of the fan cover 17.

Referring to fig. 4, the impeller 4 is a semi-open impeller 4, and includes a back cover plate 18 and a plurality of blades 19 spirally arranged, wherein the inner ends of the blades 19 are provided with cutting edges 20. Preferably, the cutting edge 20 is disposed upwardly. The residual food residues in the dish washer can be cut by utilizing the micro blade structure of the impeller 4, and the passing rate of the food residues can be increased by using the semi-open impeller 4, so that the residues are efficiently discharged out of the pump.

The water outlet 21 of the pump body 2 is provided with a plurality of inverted conical inverted structures 22, and the inverted structures 22 are fixedly connected with the water outlet pipe. The dishwasher water pump uses liquid temperature around 60 ℃, and the water pump outlet is equipped with the pipeline locking structure of back-off, can effectively reduce the outlet pipe because of the risk that high temperature deformation outlet pipe explodes.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. The utility model provides a special centrifugal pump of dish washer, includes motor (1), pump body (2), pump cover (3) and impeller (4), pump body (2) and pump cover (3) fixed connection and form the pump chamber that holds impeller (4), impeller (4) are connected with motor shaft (5) transmission of motor (1), its characterized in that, front end housing (6) and pump cover (3) fixed connection of motor (1), the cover is equipped with first sealing member on the axle section in pump cover (3), the cover is equipped with the second sealing member on the axle section in front end housing (6), the front end face of front end housing (6) is provided with the water flow distance's of extension water conservancy diversion structure;

the first sealing piece is a mechanical seal (7), and the second sealing piece is a framework oil seal (8);

the flow guiding structure comprises: the front end face of the front end cover (6) surrounds the inner hole and is provided with a convex ring (9), and the outer edge of the convex ring (9) and the front end face form an arc transition.

2. The centrifugal pump special for the dish washing machine according to claim 1, wherein a plurality of water outlet holes (10) formed by hollows are formed between the front end cover (6) and the pump cover (3), and the water outlet holes (10) are circumferentially arranged.

3. The centrifugal pump special for the dish washer according to claim 1, wherein a positioning ring (11) is arranged on the front end face of the front end cover (6), and the outer wall surface of the positioning ring (11) is in contact connection with the inner wall surface of the pump cover (3).

4. Centrifugal pump special for dish washing machine according to claim 1, characterized in that the front end cover (6) and the pump cover (3) are fastened and connected by a plurality of fasteners (12) arranged circumferentially, a plurality of mounting angles are arranged between the front end cover (6) and the pump cover (3), and a plurality of supporting platforms (13) with different orientations are arranged on the peripheral surfaces of the pump body (2) and the pump cover (3).

5. The centrifugal pump special for the dish washing machine according to claim 1, wherein a capacitor bracket (14) is arranged on the outer side of the motor (1), an external capacitor (15) is arranged on the capacitor bracket (14), and a gap is reserved between the external capacitor (15) and a shell of the motor (1).

6. The centrifugal pump special for a dish washer according to claim 5, wherein a fan (16) and a fan cover (17) are arranged at the rear end of the motor (1), and the external capacitor (15) is arranged opposite to an air outlet of the fan cover (17).

7. Centrifugal pump special for dish washing machine according to claim 1, characterized in that the impeller (4) is a semi-open impeller comprising a back cover plate (18) and a number of helically arranged blades (19), the inner ends of the blades (19) being provided with cutting edges (20).

8. Centrifugal pump special for dish washer according to claim 1, characterized in that the water outlet (21) of the pump body (2) is provided with a plurality of inverted cone-shaped inverted structures (22), the inverted structures (22) are fixedly connected with the water outlet pipe.