Novel high-efficiency centrifugal pump

Abstract

The utility model discloses a novel high-efficiency centrifugal pump which comprises a pump body, a pump cover and an impeller, the impeller is arranged in the pump body in a rotating mode, and the pump body is connected with the pump cover through a bolt. The impeller comprises a rear cover plate and a connecting sleeve arranged in the center of the rear cover plate, a shaft hole is formed in the center of the connecting sleeve, a plurality of blades are circumferentially distributed on the peripheral side of the connecting sleeve at equal intervals, the blades are in an arc shape and are arranged in a bent mode, and the blades are obliquely arranged around the side face of the outer edge of the connecting sleeve in a bent mode. The ends, away from the connecting sleeve, of the blades extend to the edge of the rear cover plate, and the matching size of the outer edge of the impeller and the pump body is n, nlt. 1 mm. The novel high-efficiency centrifugal pump has the advantages of being high in pump operation efficiency and large in flow and lift.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pump technology, specifically relating to a new type of high-efficiency centrifugal pump. Background Technology

[0002] Single-stage, single-suction centrifugal pumps are indispensable fluid transport equipment in chemical production, widely used in the transport and pressurization of various liquids. Their efficiency directly affects motor power and energy consumption. However, current centrifugal pumps are limited by their size; under the same pump body structure, the flow rate and head cannot be changed. Figure 1 and Figure 2 As shown, due to limitations in shape and internal volume, the pump suction pressure and flow rate of the impeller are restricted, affecting the overall operating efficiency of the centrifugal pump. Utility Model Content

[0003] The purpose of this invention is to provide a new type of high-efficiency centrifugal pump to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A novel high-efficiency centrifugal pump includes a pump body, a pump cover, and an impeller. The impeller is rotatably mounted in the pump body, and the pump body and pump cover are connected by bolts. The impeller includes a rear cover plate and a connecting sleeve located at the center of the rear cover plate. A shaft hole is opened at the center of the connecting sleeve. Several blades are evenly distributed circumferentially around the connecting sleeve. The blades are arc-shaped and curved, and are arranged obliquely and curved around the outer edge of the connecting sleeve. The end of the blade away from the connecting sleeve extends to the edge of the rear cover plate. The matching dimension between the outer edge of the impeller and the pump body is n, where n < 1 mm.

[0006] The working process and principle of the above structure are as follows:

[0007] By using blades to fit around the connecting sleeve and back plate, the flow channel area can be maximized. The blades are arc-shaped and curved, which can widen the flow channel within the existing size range. Only the back cover plate is designed so that the outlet flow channel is in the open state, which facilitates the increase of impeller flow rate, head and pump efficiency. The design of the impeller and pump body matching size n reduces the turbulence and eddies generated between the impeller and pump body, improves pump operating efficiency and saves energy. The blade and back cover plate are designed with the shape of the impeller curved, with appropriate height and width.

[0008] Furthermore, the blade, connecting sleeve, and rear cover plate are integrally formed.

[0009] The blades, connecting sleeves, and rear cover plate, which are integrally molded, offer greater stability.

[0010] Furthermore, the number of blades is at least five.

[0011] The limitation on the number of blades ensures the strength of the negative pressure suction force generated by the blades.

[0012] Furthermore, the distance between the outer edges of the two adjacent blades at the outlet of the impeller is set to B, and the outer diameter of the impeller is set to D, with B:D being 0.2 to 0.25.

[0013] This design widens the impeller flow channel, increases the flow rate, raises the head, improves pump efficiency, reduces motor power, broadens the selection range, and gives it a competitive advantage in the market.

[0014] Furthermore, the matching gap between the impeller and the pump cover is m, and m does not exceed 1mm.

[0015] The design limits the overall space dimensions of the impeller and pump cover, appropriately widens the impeller outlet, reduces internal flow losses and volumetric losses, improves pump operating efficiency, and saves energy.

[0016] Beneficial effects: This utility model maximizes the flow channel area by using blades that surround the connecting sleeve and back plate. The blades are arc-shaped and curved, widening the flow channel within the existing size range. Only the rear cover plate is designed, keeping the outlet flow channel open, facilitating increased impeller flow rate, higher head, and improved pump efficiency. The design of the impeller-pump body matching dimension n reduces turbulence and eddies between the impeller and pump body, improving pump operating efficiency and saving energy. The blade and rear cover plate are designed with the impeller curved shape, with suitable height and width. The design of the new structure maintains similar manufacturing costs, processing technology, and mold making as the original impeller, but increases flow rate and head, improves efficiency by 7-15%, reduces motor power, and saves energy. This design mainly modifies the impeller's geometry, dimensions, and component clearance matching. In addition to increasing the pump's parameters of flow rate and head, it improves pump efficiency, reduces motor power, and saves energy. At the same time, it broadens the selection range, giving it a priority advantage in the market. The design of matching dimensions with the pump cover retains appropriate clearance, reduces volumetric losses, and improves pump efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an existing centrifugal pump;

[0018] Figure 2 A schematic diagram of the impeller structure of an existing centrifugal pump;

[0019] Figure 3 This is a main sectional view of the overall structure of this utility model;

[0020] Figure 4This is a three-dimensional structural diagram of the impeller in this utility model;

[0021] Figure 5 This is a front view of the impeller structure in this utility model.

[0022] Reference numerals in the attached drawings: 1. Pump body; 2. Pump cover; 3. Impeller; 4. Bolt; 5. Rear cover plate; 6. Connecting sleeve; 7. Shaft hole; 8. Blade. Detailed Implementation

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0024] Example:

[0025] like Figures 3-5 As shown, this embodiment provides a novel high-efficiency centrifugal pump, including a pump body 1, a pump cover 2, and an impeller 3. The impeller 3 is rotatably disposed inside the pump body 1, and the pump body 1 and the pump cover 2 are connected by bolts 4. The impeller 3 includes a rear cover plate 5 and a connecting sleeve 6 disposed at the center of the rear cover plate 5. The connecting sleeve 6 has a cylindrical structure, and the rear cover plate 5 has a circular structure. A shaft hole 7 is opened at the center of the connecting sleeve 6, and the shaft hole 7 extends out of the connecting sleeve 6 to form a cylindrical structure. Six blades 8 are evenly distributed circumferentially around the connecting sleeve 6. The blades 8 are arc-shaped and curved. The blades 8 are arranged obliquely and curved around the outer edge of the connecting sleeve 6. The end of the blade 8 away from the connecting sleeve 6 extends to the edge of the rear cover plate 5. The end face of the blade 8 away from the connecting sleeve 6 is an inclined surface. This arrangement helps to reduce the resistance of the water flow and can cut the water flow more easily when rotating. The matching dimension between the outer edge of the impeller 3 and the pump body 1 is n, where n < 1 mm.

[0026] The working process and principle of the above structure are as follows:

[0027] By using the blades 8 to cooperate with the connecting sleeve 6 and the back plate, the flow channel area can be maximized. The blades 8 are arc-shaped and curved, which can widen the flow channel within the existing size range. Only the rear cover plate 5 is designed so that the outlet flow channel is in the open state, which facilitates the increase of impeller 3 flow rate, head and pump efficiency. The design of the impeller 3 and the pump body 1 matching size n reduces the turbulence and eddies generated between the impeller 3 and the pump body 1, improves pump operating efficiency and saves energy. The blades 8 and the rear cover plate 5 are designed to fit the curved shape of the impeller 3, with appropriate height and width.

[0028] In another embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the blade 8, the connecting sleeve 6, and the rear cover plate 5 are integrally formed.

[0029] The blade 8, connecting sleeve 6, and rear cover plate 5, which are integrally molded, have greater stability.

[0030] In another embodiment of this utility model, such as Figure 4 and Figure 5 As shown, there are six blades (8).

[0031] The limitation on the number of blades 8 ensures the strength of the negative pressure suction force generated by the blades 8.

[0032] In another embodiment of this utility model, such as Figures 3-5 As shown, the distance between the outlet of impeller 3, i.e., the outer edge of two adjacent blades 8, is set to B, and the outer diameter of impeller 3 is D, with B:D being 0.2 to 0.25.

[0033] This design widens the impeller's three flow channels, increases flow rate, raises head, improves pump efficiency, reduces motor power, broadens the selection range, and gives it a competitive advantage in the market.

[0034] In another embodiment of this utility model, such as Figure 3 As shown, the matching gap between the impeller 3 and the pump cover 2 is m, and m does not exceed 1mm.

[0035] The design limits the overall space dimensions of the impeller 3 and pump cover 2, appropriately widens the outlet of the impeller 3, reduces internal flow loss and volumetric loss, improves pump operating efficiency, and saves energy.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A novel high-efficiency centrifugal pump, characterized in that, The pump includes a pump body, a pump cover, and an impeller. The impeller is rotatably mounted in the pump body, and the pump body and pump cover are connected by bolts. The impeller includes a rear cover plate and a connecting sleeve located at the center of the rear cover plate. The connecting sleeve has a shaft hole at its center. Several blades are evenly distributed circumferentially around the connecting sleeve. The blades are arc-shaped and curved, and are arranged obliquely around the outer edge of the connecting sleeve. The end of the blade away from the connecting sleeve extends to the edge of the rear cover plate. The matching dimension between the outer edge of the impeller and the pump body is n, where n < 1 mm.

2. The novel high-efficiency centrifugal pump according to claim 1, characterized in that, The blades, connecting sleeves, and rear cover plate are integrally formed.

3. The novel high-efficiency centrifugal pump according to claim 2, characterized in that, The number of blades is at least five.

4. The novel high-efficiency centrifugal pump according to claim 3, characterized in that, The outlet of the impeller, i.e., the distance between the outer edges of two adjacent blades, is set to B, and the outer diameter of the impeller is D, where B:D is 0.2 to 0.

25.

5. The novel high-efficiency centrifugal pump according to claim 4, characterized in that, The matching gap between the impeller and the pump cover is m, and m does not exceed 1mm.

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