Combined impeller with protrusions and centrifugal pump

Abstract

The utility model belongs to the technical field of impellers, and particularly relates to a combined impeller with protrusions and a centrifugal pump, the combined impeller comprises an upper cover plate, a lower cover plate and a plurality of blades arranged between the upper cover plate and the lower cover plate, the blades, the upper cover plate and the lower cover plate define a flow guide channel, at least one protrusion is arranged in the flow guide channel, and the protrusions extend in the direction of the blades. The upper cover plate is provided with a water inlet end, the water inlet end is connected with the head end of the flow guide channel, the tail end of the flow guide channel is a water outlet end, all the structures of the impeller are combined through the idea of separation design, fine machining can be conveniently conducted on all the structures of the impeller, and the structures can be replaced after being damaged; the adhesion resistance between water in unit area and the flow guide channel is reduced, the centrifugal force of the flow guide channel is increased, and the working efficiency of the impeller is improved.

Description

Technical Field

[0001] This application belongs to the technical field of impellers, and particularly relates to a combined impeller with protrusions and a centrifugal pump. Background Art

[0002] The impeller in a centrifugal pump is the core component of the centrifugal pump. It is driven by a power device to rotate within the centrifugal pump to convey liquids such as water. Currently, impellers are mainly formed by casting, and the machining surface is limited to the external surface. The internal surface is rough and difficult to machine. In addition, due to the rough internal surface, the water outlet uniformity is poor. At the same time, the working efficiency of the current blades is not high.

[0003] In some special usage environments, the impeller is severely worn, especially the blade part, resulting in a high usage cost of the impeller. Utility Model Content

[0004] To solve the above problems, this application provides a combined impeller with protrusions and a centrifugal pump.

[0005] The first object of this application is to provide a combined impeller with protrusions. By using the idea of a separation design, the various structures of the impeller are combined, which is convenient for precision machining of each structure of the impeller. It can be replaced after damage. There are protrusions in the diversion channel, which reduces the adhesion resistance between water per unit area and the diversion channel, increases the centrifugal force of the diversion channel, and improves the working efficiency of the impeller.

[0006] To achieve the first object of this application, the technical solution of this application is as follows:

[0007] A combined impeller with protrusions includes an upper cover plate, a lower cover plate, and a plurality of blades arranged between the upper cover plate and the lower cover plate. The blades and the upper cover plate, the lower cover plate enclose a diversion channel. At least one protrusion is provided in the diversion channel, and the protrusion extends along the direction of the blade. An inlet end is provided on the upper cover plate, and the inlet end is connected to the head end of the diversion channel. The end of the diversion channel is the outlet end.

[0008] Further, the cross-section of the protrusion is triangular, and the contact between the protrusion and the upper cover plate or the contact between the protrusion and the lower cover plate is the base of the triangle.

[0009] Further, the inlet end includes a mouth ring, the mouth ring is fixedly connected to the upper cover plate, and the internal chamber of the mouth ring is the inlet chamber.

[0010] Further, the head end of the blade extends into the inlet chamber, and the end of the blade is connected to the inner circumference of the cylinder of the mouth ring.

[0011] Further, the connection end includes a connection cylinder, the connection cylinder is fixedly connected to the lower cover plate, the internal chamber of the connection cylinder is the connection chamber, and the aperture of the connection chamber is smaller than the aperture of the inlet chamber.

[0012] Further, the upper cover plate is fixedly connected to the blade through connecting bolts, or the lower cover plate is fixedly connected to the blade through connecting bolts.

[0013] Further, through holes are provided on the upper cover plate or the lower cover plate, and connecting screw holes are provided on the blade. The connecting bolts pass through the through holes and are screwed to the connecting screw holes.

[0014] Further, positioning holes are provided on both the blade and the lower cover plate, and positioning columns are provided in the positioning holes. Alternatively, positioning holes are provided on both the blade and the upper cover plate, and positioning columns are provided in the positioning holes.

[0015] Further, the positioning holes are frustum-shaped, and the central diameter of the positioning column is larger than the end diameter of the positioning column.

[0016] The second object of the present application is to provide a centrifugal pump, in which the above-mentioned combined impeller is installed, so that the working efficiency of the centrifugal pump is improved and the use cost is reduced.

[0017] To achieve the second object of the present application, the technical solution of the present application is as follows:

[0018] A centrifugal pump, in which the above-mentioned combined impeller with protrusions is installed. The water inlet pipe of the centrifugal pump is communicated with the water inlet end, and the water outlet pipe of the centrifugal pump is communicated with the water outlet end.

[0019] Compared with the prior art, the beneficial effects of the present application are as follows:

[0020] 1. The present application arranges protrusions in the diversion channel, reducing the adhesion resistance between water per unit area and the diversion channel, increasing the centrifugal force of the diversion channel, and enabling the fluid to better move along the blades and protrusions towards the water outlet pipe, improving the working efficiency of the impeller and the centrifugal pump equipped with this impeller.

[0021] 2. The impeller of the present application adopts a combined installation scheme. The blades can be connected to the cover plate through connecting bolts, positioning columns and other schemes, which is convenient for precision machining of the blades and the cover plate, improving the quality of the impeller. Also, the blades can be replaced after damage, reducing the use cost of the impeller. Description of the Drawings

[0022] The attached drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0023] Figure 1 It is a schematic diagram of the overall structure of this application in one direction.

[0024] Figure 2 It is a schematic diagram of the overall structure of this application in another direction.

[0025] Figure 3 It is a schematic assembly diagram of the present application in one direction.

[0026] Figure 4 It is a schematic assembly diagram of the present application in another direction.

[0027] Figure 5 It is a schematic structural diagram of an impeller applied to a double-suction pump of the present application.

[0028] In the figure:

[0029] 1. Upper cover plate, 2. Water inlet end, 3. Lower cover plate, 4. Blade, 5. Protrusion, 6. Connection end, 7. Connection bolt, 8. Connection screw hole, 9. Through hole, 10. Positioning hole, 11. Positioning post. Specific embodiments

[0030] The present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] In the present application, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present application and do not specifically refer to any component or element in the present application and should not be construed as a limitation to the present application.

[0033] Embodiment 1

[0034] This embodiment is a combined impeller with protrusions, mainly applied to centrifugal pumps, such as Figures 1 - 5As shown in the figure, from a structural perspective, the impeller of this embodiment includes an upper cover plate 1, a lower cover plate 3, and a plurality of blades 4 arranged between the upper cover plate 1 and the lower cover plate 3. The blades 4 are arc-shaped and are arranged in an arc shape bending from the water inlet to the water outlet. The blades 4 and the upper cover plate 1 and the lower cover plate 3 enclose a diversion channel. Fluids such as water flow from the water inlet to the water outlet along the diversion channel. As the core structure, there is at least one protrusion 5 in the diversion channel, and this protrusion 5 is processed onto the cover plate during processing, for example, directly cast integrally formed, machined, or welded together. The extending direction of the protrusion 5 is the same as the extending direction of the blade 4. From the shape perspective, the cross-section of the protrusion 5 is triangular, and the contact part of the protrusion 5 with the cover plate is the base of the triangle, that is, the protrusion 5 away from the cover plate gradually tapers. Other cross-sectional shapes are also possible, such as quadrilateral. The cover plate is the upper cover plate 1 or the lower cover plate 3. The upper cover plate 1 has a water inlet end 2, and the water inlet end 2 is connected to the head end of the diversion channel. The end of the diversion channel is the water outlet end. As an implementation scheme, the lower cover plate 3 has a connection end 6, and the connection end 6 is integral with the lower cover plate 3.

[0035] As a specific implementation scheme, the water inlet end 2 includes a gland, and the gland is fixedly connected to the upper cover plate 1. Or, during processing, the water inlet end 2 and the upper cover plate 1 are integrally formed. The inner chamber of the gland is the water inlet chamber. The connection end 6 includes a connecting cylinder, and the connecting cylinder is fixedly connected to the lower cover plate 3. Or, the inner chamber of the connecting cylinder is the connection chamber, and the aperture of the connection chamber is smaller than the aperture of the water inlet chamber.

[0036] In this embodiment, since the aperture of the connection chamber is smaller than the aperture of the water inlet chamber, a part of the blade 4 is arranged at the connection of the water inlet chamber and the diversion channel. In this part of the area, the head end of the blade 4 extends into the water inlet chamber, and the blade 4 is connected to the inner periphery of the cylinder body of the water inlet end, so that the head end of the blade 4 is arranged at the connection of the water inlet chamber and the diversion channel, enabling fluids such as water to enter the diversion channel better.

[0037] More specifically, as Figures 3 - 4 shown, as a combination scheme of the impeller, the lower cover plate 3 of this embodiment is fixedly connected to the blade 4 through a connection bolt 7. Similarly, the upper cover plate 1 can also be fixedly connected to the blade 4 through a connection bolt 7. In this embodiment, a through hole 9 is opened on the lower cover plate 3. The through hole 9 is a counterbore. A connection screw hole 8 is opened on the blade 4. The connection bolt 7 passes through the through hole 9 and is threadedly connected to the connection screw hole 8. As a positioning structure and an auxiliary structure for increasing strength, positioning holes 10 are opened on both the blade 4 and the lower cover plate 3. A positioning post 11 is installed in the positioning hole 10. For the convenience of installing the positioning post 11, the positioning post 11 of this embodiment is designed with a thick middle and thin ends. The central diameter of the positioning post 11 is greater than the end diameter of the positioning post 11. Correspondingly, the positioning hole 10 is frustum-shaped. In addition, the upper cover plate 1 of this embodiment can also be provided with a through hole 9 and a positioning hole 10 to realize the separate installation of the upper cover plate 1, the lower cover plate 3, and the blade 4.

[0038] As Figure 5 shown, as one of the types of centrifugal pumps, a double-suction pump can also adopt the impeller structure of this embodiment. Specifically, with the lower cover plate 3 as the center of the impeller of the double-suction pump, diversion channels are arranged on both sides thereof, and there is at least one protrusion 5 in each of the diversion channels.

[0039] Embodiment 2

[0040] This embodiment is a centrifugal pump, which includes a pump casing and a power device that provides power for the centrifugal pump. This power device can be regarded as a part of the centrifugal pump or not. Generally, the power device of the centrifugal pump is a motor. Specifically, the impeller in Embodiment 1 is installed in the pump casing of the centrifugal pump. The water inlet pipe of the centrifugal pump is communicated with the water inlet end 2, the water outlet pipe of the centrifugal pump is communicated with the water outlet end, and the output shaft of the power device of the centrifugal pump is connected to the connection end 6.

[0041] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0042] Although the specific implementation manners of the present application have been described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present application. Those skilled in the art should understand that based on the technical solutions of the present application, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present application.

Claims

1. A combined impeller with protrusions, characterized in that: It includes an upper cover plate (1), a lower cover plate (3) and a plurality of blades (4) arranged between the upper cover plate (1) and the lower cover plate (3). The blades (4) and the upper cover plate (1), the lower cover plate (3) enclose a flow guiding channel. At least one protrusion (5) is arranged in the flow guiding channel. The protrusion (5) extends along the direction of the blade (4). An inlet end (2) is arranged on the upper cover plate (1). The inlet end (2) is connected to the head end of the flow guiding channel, and the end of the flow guiding channel is the outlet end.

2. The combined impeller with protrusions according to claim 1, characterized in that: The cross section of the protrusion (5) is triangular, and the contact part of the protrusion (5) with the upper cover plate (1) or the contact part of the protrusion (5) with the lower cover plate (3) is the bottom of the triangle.

3. The combined impeller with protrusions according to claim 1, characterized in that: The inlet end (2) includes a gland, the gland is fixedly connected with the upper cover plate (1), the inner chamber of the gland is the inlet chamber, and the lower cover plate (3) has a connection end (6).

4. The combined impeller with protrusions according to claim 3, characterized in that: The head end of the blade (4) extends into the inlet chamber, and the end of the blade (4) is connected to the inner circumference of the cylinder body of the gland.

5. The combined impeller with protrusions according to claim 3, characterized in that: The connection end (6) includes a connection cylinder, the connection cylinder is fixedly connected with the lower cover plate (3), the inner chamber of the connection cylinder is the connection chamber, and the aperture of the connection chamber is smaller than the aperture of the inlet chamber.

6. The combined impeller with protrusions according to claim 1, characterized in that: The upper cover plate (1) is fixedly connected with the blade (4) through a connection bolt (7), or the lower cover plate (3) is fixedly connected with the blade (4) through a connection bolt (7).

7. The combined impeller with protrusions according to claim 6, characterized in that: A through hole (9) is arranged on the upper cover plate (1) or the lower cover plate (3), a connection screw hole (8) is arranged on the blade (4), and the connection bolt (7) passes through the through hole (9) and is screwed with the connection screw hole (8).

8. The combined impeller with protrusions according to claim 6, characterized in that: Positioning holes (10) are arranged on both the blade (4) and the lower cover plate (3), and positioning posts (11) are arranged in the positioning holes (10), or positioning holes (10) are arranged on both the blade (4) and the upper cover plate (1), and positioning posts (11) are arranged in the positioning holes (10).

9. The combined impeller with protrusions according to claim 8, characterized in that: The positioning hole (10) is frustum-shaped, and the central diameter of the positioning post (11) is larger than the end diameter of the positioning post (11).

10. A centrifugal pump, characterized in that: The centrifugal pump is equipped with a combined impeller with protrusions according to any one of claims 1-9. The inlet pipeline of the centrifugal pump is communicated with the inlet end (2), and the outlet pipeline of the centrifugal pump is communicated with the outlet end.

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