Impeller of water pump

Abstract

The utility model belongs to the technical field of water pumps and particularly relates to an impeller of a water pump. Comprising a wheel disc and blades arranged on one side face of the wheel disc, the five blades are distributed in a turbine shape, motor shaft mounting holes are formed in the center of the wheel disc and comprise the first mounting hole and the second mounting hole, and the first mounting hole is connected with the tail end of a motor shaft; an end face screw penetrates through the second mounting hole and is in threaded connection with a threaded hole in the end face of the tail end of the motor shaft, a pentagonal protrusion is arranged on the end face, provided with the blades, of the wheel disc, and the second mounting hole penetrates through the pentagonal protrusion; the inner ends of the blades surround the pentagonal protrusions and are arranged with the pentagonal protrusions at intervals to form flow guide channels. When the impeller rotates relative to the shell, water flow enters the water channel between the two adjacent blades from the flow guide channels formed by the inner ends of the adjacent blades and the side faces corresponding to the pentagonal protrusions and is thrown out, the service life of the pump body is prolonged, and the suction force of the pump is improved.

Description

Technical fields:

[0001] This utility model belongs to the field of water pump technology, and specifically refers to a water pump impeller. Background technology:

[0002] A water pump is a general-purpose machine used to transport fluids and increase their pressure. In various industrial sectors, wherever fluid transportation is involved, water pumps are present. They are primarily used to transport liquids such as water, oil, acids and alkalis, emulsions, suspensions, and liquid metals. They can also transport liquid-gas mixtures and liquids containing suspended solids. Applications include water conservancy, petroleum, chemical, urban water supply and drainage, metallurgy, and transportation industries. The impeller is the core component of the water pump and a major factor affecting its efficiency. In existing impellers, water at the center is thrown outwards by centrifugal force and the flow channels formed between the blades; however, there is no effective guidance before the water enters the flow channels. Summary of the Invention:

[0003] The purpose of this invention is to provide an impeller for a water pump that guides water flow by setting a polygonal protrusion at the center of the impeller to cooperate with the blades.

[0004] This utility model is implemented as follows:

[0005] An impeller for a water pump includes a disc and five blades disposed on one side of the disc. The five blades are arranged in a turbine shape. A motor shaft mounting hole is provided at the center of the disc. The motor shaft mounting hole is a stepped hole, including a first mounting hole and a second mounting hole. The first mounting hole and the second mounting hole are arranged coaxially. The first mounting hole is connected to the end of the motor shaft. The second mounting hole is used for a screw to pass through a threaded hole on the end face of the motor shaft end for threaded connection. A pentagonal protrusion is provided on the end face of the disc where the blades are disposed. The second mounting hole passes through the pentagonal protrusion. The blades are evenly distributed circumferentially around the motor shaft mounting hole, and the inner ends of the blades are arranged around the pentagonal protrusion and spaced apart from the pentagonal protrusion to form a flow guiding channel.

[0006] In the impeller of the aforementioned water pump, the blade includes an arc-shaped section and a straight section. The arc-shaped section is positioned close to the pentagonal protrusion and corresponds to the five sides of the pentagonal protrusion. The outer end of the straight section is located on the same cylindrical surface as the outer ring of the impeller.

[0007] In the impeller of the aforementioned water pump, the inner end of the arc-shaped section is inclined, and the diameter of the circle formed by the upper ends of the inner ends of the arc-shaped sections of all the blades is larger than the diameter of the circle formed by the lower ends.

[0008] In the impeller of the aforementioned water pump, the first mounting hole is a keyway hole, a spline hole, a polygonal hole, or a D-shaped hole.

[0009] In the impeller of the aforementioned water pump, a stepped surface is formed between the first mounting hole and the second mounting hole, and a toothed groove is provided on the stepped surface to mesh with the end face of the motor shaft.

[0010] In the impeller of the aforementioned water pump, the impeller disc and the turbine-shaped blades are an integral structure.

[0011] In the impeller of the aforementioned water pump, the impeller disc has several pressure relief holes distributed circumferentially, and the pressure relief holes are arranged through the impeller disc.

[0012] The outstanding advantages of this utility model compared to the prior art are:

[0013] 1. When the impeller rotates relative to the housing, the water flow enters the water channel between the two adjacent blades from the guide channel formed by the inner end of the adjacent blades and the side corresponding to the pentagonal protrusion and is thrown outward. This can prevent the impeller from reversing, extend the service life of the pump body, and help increase the pressure inside the impeller and increase the suction of the pump.

[0014] 2. This utility model has several pressure relief holes distributed circumferentially on the wheel, which can ensure the balance of the wheel;

[0015] 3. This utility model achieves the connection between the impeller and the motor shaft through end face screws, which is simple in connection structure and easy to disassemble and assemble. Attached image description:

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0017] Figure 2 This is the front view of this utility model;

[0018] Figure 3 This is a utility model

[0019] Figure 4 yes Figure 3 AA sectional view.

[0020] In the diagram: 1. Wheel; 2. Blade; 3. First mounting hole; 4. Second mounting hole; 5. Pentagonal protrusion; 6. Guide channel; 7. Arc-shaped section; 8. Straight section; 9. Stepped surface. Detailed implementation method:

[0021] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —4:

[0022] This utility model provides an impeller for a water pump. The impeller includes a disc 1 and blades 2 disposed on one side of the disc 1. Five blades 2 are provided and are distributed in a turbine shape. A motor shaft mounting hole is provided at the center of the disc 1. The motor shaft mounting hole is a stepped hole, including a first mounting hole 3 and a second mounting hole 4. The first mounting hole 3 and the second mounting hole 4 are arranged coaxially. The first mounting hole 3 is connected to the end of the motor shaft. The second mounting hole 4 is used for end face screws to pass through threaded holes on the end face of the end of the motor shaft for threaded connection. A pentagonal protrusion 5 is provided on the end face of the disc 1 where the blades 2 are disposed. The second mounting hole 4 passes through the pentagonal protrusion 5.

[0023] This invention uses end face screws to connect the impeller and the motor shaft, resulting in a simple connection structure and easy assembly and disassembly.

[0024] Furthermore, the blades 2 are evenly distributed circumferentially around the motor shaft mounting hole, and the inner ends of the blades 2 are arranged around the pentagonal protrusions 5, forming guide channels 6 at intervals with the pentagonal protrusions 5. The five blades 2 form five water channels. When the impeller rotates relative to the housing, the water flows from the guide channels 6 formed by the inner ends of adjacent blades 2 and the sides corresponding to the pentagonal protrusions 5 into the water channels between adjacent blades and is thrown outward. This prevents the impeller from reversing, extends the service life of the pump body, and helps to increase the pressure inside the impeller and improve the pump's suction.

[0025] Furthermore, the blade 2 includes an arc-shaped section 7 and a straight section 8. The arc-shaped section 7 is located close to the pentagonal protrusion 5 and corresponds to the five sides of the pentagonal protrusion 5. The outer end of the straight section 8 is located on the same cylindrical surface as the outer ring of the wheel 1, so that the direction of the water flow will not change after it is thrown out.

[0026] In order to improve the water storage capacity inside the impeller, the inner end of the arc segment 7 is inclined, and the diameter of the circle formed by the upper end of the inner end of the arc segment 7 of all blades 2 is larger than the diameter of the circle formed by the lower end.

[0027] Furthermore, to ensure synchronous rotation of the impeller and motor shaft, the first mounting hole 3 is a keyway hole, spline hole, polygonal hole, or D-shaped hole. In this embodiment, the first mounting hole 3 is a keyway hole.

[0028] As another embodiment for ensuring synchronous rotation of the impeller and the motor shaft, the present invention can also adopt the following scheme: a stepped surface 9 is formed between the first mounting hole 3 and the second mounting hole 4, and a toothed groove that meshes with the end face of the motor shaft is provided on the stepped surface 9.

[0029] In addition, this embodiment can also use a threaded connection between the first mounting hole 3 and the motor shaft, with the thread direction opposite to the rotation direction of the motor shaft, to prevent the connection between the impeller and the motor shaft from becoming loose.

[0030] Furthermore, the wheel 1 and turbine blade 2 described in this utility model are an integral structure, made of cast iron, which has the advantages of high strength and long service life.

[0031] To ensure the balance of the wheel 1, the wheel 1 is provided with several pressure relief holes distributed circumferentially, and the pressure relief holes are set through the wheel 1.

[0032] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An impeller for a water pump, comprising a disc (1) and blades (2) disposed on one side of the disc (1), characterized in that: The blades (2) are provided with five blades, which are distributed in a turbine shape. The center of the wheel (1) is provided with a motor shaft mounting hole. The motor shaft mounting hole is a stepped hole, including a first mounting hole (3) and a second mounting hole (4). The first mounting hole (3) and the second mounting hole (4) are arranged on the same axis. The first mounting hole (3) is connected to the end of the motor shaft. The second mounting hole (4) is used for the end face screw to pass through the threaded hole on the end face of the end of the motor shaft for threaded connection. A pentagonal protrusion (5) is provided on one end face of the blades (2) on the wheel (1). The second mounting hole (4) is provided through the pentagonal protrusion (5). The blades (2) are evenly distributed circumferentially with the motor shaft mounting hole as the center, and the inner end of the blades (2) is arranged around the pentagonal protrusion (5) and is spaced apart from the pentagonal protrusion (5) to form a guide channel (6).

2. The impeller of a water pump according to claim 1, characterized in that: The blade (2) includes an arc-shaped section (7) and a straight section (8). The arc-shaped section (7) is located close to the pentagonal protrusion (5) and corresponds to the five sides of the pentagonal protrusion (5). The outer end of the straight section (8) is located on the same cylindrical surface as the outer ring of the wheel (1).

3. The impeller of a water pump according to claim 2, characterized in that: The inner end of the arc segment (7) is inclined, and the diameter of the circle formed by the upper end of the inner end of the arc segment (7) of all blades (2) is larger than the diameter of the circle formed by the lower end.

4. The impeller of a water pump according to any one of claims 1-3, characterized in that: The first mounting hole (3) is a keyway hole, a spline hole, a polygonal hole, or a D-shaped hole.

5. The impeller of a water pump according to any one of claims 1-3, characterized in that: A stepped surface (9) is formed between the first mounting hole (3) and the second mounting hole (4), and a toothed groove that meshes with the end face of the motor shaft is provided on the stepped surface v.

6. The impeller of a water pump according to any one of claims 1-3, characterized in that: The wheel (1) and the turbine blade (2) are an integral structure.

7. The impeller of a water pump according to claim 1, characterized in that: The wheel (1) has several pressure relief holes distributed circumferentially, and the pressure relief holes are set through the wheel (1).

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