A lightweight water pump rotor

Abstract

The utility model relates to a centrifugal pump impeller structure, in particular to a lightweight water pump rotor. A lightweight water pump rotor includes an impeller upper cover plate and an impeller lower plastic part, wherein an impeller bearing is vertically arranged in the middle of the impeller upper cover plate, and holes are evenly arranged on the edge of the impeller upper cover plate, and a channel for accommodating the impeller bearing is arranged in the middle of the impeller lower plastic part, and a plug column is arranged on the surface of the impeller lower plastic part, and the plug column is inserted into the plug hole, and an impeller magnetic ring is arranged at the lower part of the impeller lower plastic part. The benefits of the utility model are: novel structure, ingenious and compact design, light impeller weight, and convenient for lightweight design of water pumps; the impeller magnetic ring is a molded NdFeB magnetic ring with high magnetic density, which can be applied to high-power and high-efficiency water pump solutions; the impeller magnetic ring is plastic-wrapped, which is isolated from erosion and corrosion and has a long service life; small size, small number of parts, light product weight, and low cost.

Description

Technical Field

[0001] The utility model relates to a centrifugal pump impeller structure, in particular to a lightweight water pump rotor. Background Art

[0002] The impellers of sintered NdFeB water pumps on the market have a large deadweight, which increases the energy consumption of automobiles. The magnetization strength of injection-molded NdFeB water pump impellers is low and cannot meet the needs of high-power water pumps. Molded NdFeB water pumps will be corroded and cracked by coolant and cannot be used in complex environments. Most of the water pump impellers on the market are sintered NdFeB magnets and silicon steel sheets with rotor structure and injection-molded NdFeB magnetic ring structure. Sintered NdFeB has high magnetization strength but heavy weight. Silicon steel sheet lamination molding has an adverse effect on the dynamic balance of the impeller. Injection-molded NdFeB has light deadweight but the magnetization strength is only 2000Gs. There is no impeller on the market that can take into account both light deadweight and high magnetization strength. Summary of the invention

[0003] In order to solve the above-mentioned technical problems of erosion cracking and heavy weight, the utility model provides a lightweight water pump rotor.

[0004] The technical solution of the utility model is as follows:

[0005] A lightweight water pump rotor comprises an impeller upper cover plate and an impeller lower plastic part, wherein an impeller bearing is vertically arranged in the middle of the impeller upper cover plate, insertion holes are evenly arranged on the edge of the impeller upper cover plate, a channel for accommodating the impeller bearing is arranged in the middle of the impeller lower plastic part, a plug column is arranged on the surface of the impeller lower plastic part, the plug column is inserted into the plug hole, and an impeller magnetic ring is arranged at the lower part of the impeller lower plastic part.

[0006] A recessed opening is arranged in the middle of the impeller bearing.

[0007] The inner wall of the impeller lower body plastic part is provided with a convex block for clamping the concave opening.

[0008] A wrapping piece is provided at the lower part of the impeller lower body plastic piece, the cross section of the wrapping piece is I-shaped, a clamping block is provided at the connection of the inner wall of the wrapping piece, and an impeller magnetic ring is provided on the wrapping piece.

[0009] The outer wall of the impeller magnetic ring is concave and wraps the magnetic ring plastic coating structure, and the magnetic ring plastic coating structure is a PPS plastic coating structure, and the plastic coating layer thickness is 0.5mm.

[0010] The impeller magnetic ring is a molded NdFeB magnetic ring.

[0011] The technical solution of the utility model has a novel structure, an ingenious and compact design, a light impeller, and is convenient for lightweight design of a water pump; the impeller magnetic ring is a molded NdFeB magnetic ring with high magnetic density, and can be applied to high-power and high-efficiency water pump solutions; the impeller magnetic ring is plastic-wrapped to isolate erosion and corrosion and has a long service life; it has a small size, a small number of parts, a light product weight, and a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 , 3 It is a structural schematic diagram of the utility model;

[0013] Figure 2 yes Figure 1 Schematic diagram of the structure in the CC section;

[0014] Figure 4 It is a structural schematic diagram of the utility model in an explosion state. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Example

[0016] like Figure 1 , 2 A lightweight water pump rotor shown in , 3, and 4 includes an impeller upper cover plate 21 and an impeller lower plastic part 25. The impeller upper cover plate 21 is made of PPS material. An impeller bearing 22 is vertically arranged in the middle of the impeller upper cover plate 21. The impeller bearing 22 is made of graphite and provides a guide for the rotation of the impeller. Plug holes 28 are evenly arranged on the edge of the impeller upper cover plate 21. A channel for accommodating the impeller bearing 22 is arranged in the middle of the impeller lower plastic part 25. A plug column 27 is arranged on the surface of the impeller lower plastic part 25. The plug column 27 is inserted into the plug hole 28. An impeller magnetic ring 24 is arranged at the lower part of the impeller lower plastic part 25. The impeller lower plastic part 25 is made of PPS material, and is injection molded with the bearing magnetic ring insert to fix the impeller assembly, and is welded with the impeller upper cover plate 21 to form a water flow surface. The impeller magnetic ring 24 is a molded rubidium iron boron magnetic ring, which is made of rubidium iron boron and provides power for the impeller.

[0017] A recessed opening 26 is provided in the middle of the impeller bearing 22 .

[0018] The inner wall of the impeller lower plastic part 25 is provided with a protrusion 29 for locking the recessed opening 26 .

[0019] A wrapping piece is provided at the lower part of the impeller lower body plastic piece 25 . The cross section of the wrapping piece is I-shaped. A clamping block 30 is provided at the connection of the inner wall of the wrapping piece. The impeller magnetic ring 24 is provided on the wrapping piece.

[0020] The outer wall of the impeller magnetic ring 24 is concave and wraps the magnetic ring plastic-coated structure 23. The magnetic ring plastic-coated structure 23 is a PPS plastic-coated structure with a plastic layer thickness of 0.5 mm and a PPS material. The magnetic ring plastic-coated structure 23 is an open square with wrapping pieces inserted on both sides to isolate the magnetic ring from contact with external liquid, thereby increasing the life of the impeller.

[0021] When in use, the impeller magnetic ring 24 is a permanent magnet structure. The water pump stator generates a magnetic field through the water pump controller, which repels the impeller magnetic field to generate a 5500r / min speed to drive the impeller to rotate, sucking liquid from the water inlet, and throwing the liquid to the volute through the centrifugal force generated by the high-speed rotation. The pressure difference generated by this action realizes the function of conveying liquid. The molded NdFeB plastic-coated impeller uses molded NdFeB powder as the magnetic material for the first time, taking into account the advantages of high magnetization density and light weight, and isolating the magnet from the outside through the plastic-coated structure. The impeller is in liquid contact with the interface, which solves the problem of corrosion resistance of molded NdFeB powder and improves the strength and service life of the magnet. The weight of the impeller is reduced by 40% compared with sintered NdFeB, and the total weight of the impeller is less than 50g, which can be designed to be lightweight. The maximum magnetization intensity of the impeller can reach 3000Gs, which is only 20000Gs for injection molded NdFeB water pump impellers. The impeller meets the needs of higher power water pumps, as shown in Table 1. The impeller magnetization curve; the impeller magnetic ring adopts PPS plastic-coated design to isolate the coolant from erosion, which greatly improves the service life of the impeller.

[0022] Table 1

[0023]

[0024] It should be understood that the above description is only a preferred embodiment of the present invention and is not sufficient to limit the technical solution of the present invention. For ordinary technicians in this field, within the spirit and principles of the present invention, additions, substitutions, changes or improvements can be made according to the above description, and all these additions, substitutions, changes or improved technical solutions should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A lightweight water pump rotor, comprising an impeller upper cover plate (21) and an impeller lower plastic part (25), characterized in that: An impeller bearing (22) is vertically arranged in the middle of the impeller upper cover plate (21), and insertion holes (28) are evenly arranged on the edge of the impeller upper cover plate (21). A channel for accommodating the impeller bearing (22) is arranged in the middle of the impeller lower body plastic part (25), and an insertion column (27) is arranged on the surface of the impeller lower body plastic part (25), and the insertion column (27) is inserted into the insertion hole (28). An impeller magnetic ring (24) is arranged at the bottom of the impeller lower body plastic part (25).

2. A lightweight water pump rotor according to claim 1, characterized in that: A recessed opening (26) is provided in the middle of the impeller bearing (22).

3. A lightweight water pump rotor according to claim 2, characterized in that: The inner wall of the impeller lower plastic part (25) is provided with a protrusion (29) for clamping the recessed opening (26).

4. A lightweight water pump rotor according to claim 1, characterized in that: A wrapping piece is provided at the lower part of the impeller lower body plastic piece (25), the cross section of the wrapping piece is in an I-shape, a clamping block (30) is provided at the connection of the inner wall of the wrapping piece, and an impeller magnetic ring (24) is provided on the wrapping piece.

5. A lightweight water pump rotor according to claim 1 or 4, characterized in that: The outer wall of the impeller magnetic ring (24) is concavely wrapped around the magnetic ring plastic coating structure (23); the magnetic ring plastic coating structure (23) is a PPS plastic coating structure, and the plastic coating layer thickness is 0.5 mm.

6. A lightweight water pump rotor according to claim 1, characterized in that: The impeller magnetic ring (24) is a molded NdFeB magnetic ring.

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