A high-efficiency circulating cooling water pump

Abstract

This utility model belongs to the field of cooling water pump technology, specifically relating to a high-efficiency circulating cooling water pump, including a pump body, a motor, and connecting parts. The pump body includes a pump casing and an impeller. The impeller is disposed in the pump chamber of the pump casing. The output end of the motor is connected to the shaft of the impeller via the connecting parts. The impeller includes a conical disc and a flow guiding component disposed on the conical surface of the disc. The tip of the disc faces the inlet. The flow guiding end of the flow guiding component near the inlet has an arc-shaped structure, and the fixed end of the flow guiding component near the outlet has a straight structure. This utility model, through the cooperation of the arc-shaped part and the straight part of the blade, artificially creates a bend in the middle of the blade. Water is guided at this position, and the blade root at this position is located in the middle section of the blade as a whole, resulting in good fixation and avoiding stress concentration and breakage.

Description

Technical Field

[0001] This utility model belongs to the field of cooling water pump technology, specifically relating to a high-efficiency circulating cooling water pump. Background Technology

[0002] Circulating cooling water pumps play a crucial role in chemical production. Their optimized and efficient operation is irreplaceable for ensuring production safety, improving product quality, achieving energy conservation and emission reduction, and protecting the environment. Circulating cooling water pumps are used to control the temperature of reactors in chemical production, preventing overheating that could lead to hazards or a decline in product quality.

[0003] The existing cooling water pump blades are arc-shaped. With the help of impeller rotation, water flows along the conical surface of the impeller and is thrown out of the impeller tangentially under the action of centrifugal force, thus forming water outlet. The water output position of the arc-shaped blades is concentrated at the arc-shaped end. In addition, the diameter of the arc-shaped end is the largest and the linear velocity is the highest, which easily causes wear at the end of the arc-shaped blades. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a high-efficiency circulating cooling water pump. By combining the arc-shaped part and the straight part of the blade, a bend is artificially created in the middle of the blade, where water is discharged. Furthermore, the root of the blade at this position is located in the middle section of the blade as a whole, resulting in good fixation and avoiding stress concentration and breakage.

[0005] The specific technical solution adopted in this utility model is as follows:

[0006] A high-efficiency circulating cooling water pump includes a pump body, a motor, and connecting parts. The pump body includes a pump casing and an impeller. The impeller is disposed in the pump chamber of the pump casing. The pump chamber has a disc-shaped structure, with an inlet at the end of the disc surface and an outlet along the tangential direction on the annular side of the disc surface. The output end of the motor is connected to the shaft of the impeller via the connecting parts. The impeller includes a conical disc and a flow guiding component disposed on the conical surface of the disc. The tip of the disc faces the inlet. The flow guiding end of the flow guiding component near the inlet has an arc-shaped structure, and the fixed end of the flow guiding component near the outlet has a straight structure.

[0007] The flow guiding assembly includes a main blade and an auxiliary blade, which are alternately arranged circumferentially along the impeller. The main blade includes a first arcuate portion and a first straight portion, and the auxiliary blade includes a second arcuate portion and a second straight portion. The first arcuate portion and the second arcuate portion together form the flow guiding end of the flow guiding assembly. The first arcuate portion is longer than the second arcuate portion. The first straight portion and the second straight portion together form the fixed end of the flow guiding assembly. The first straight portion and the second straight portion are of equal length.

[0008] The direction of the extension line of the input end of the first arc-shaped part forms an angle of 20-30° with the water inlet direction of the impeller.

[0009] The fixed end of the flow guiding component is provided with reinforcing ribs on both sides, and the two sides of the reinforcing ribs are fixedly connected to the fixed end of the flow guiding component and the wheel, respectively.

[0010] The connector includes a rotating shaft and a heat insulation sleeve. The fixed end of the rotating shaft is fixedly connected to the shaft center of the impeller. The two ends of the heat insulation sleeve are respectively keyed to the transmission end of the rotating shaft and the output end of the motor. The output end of the motor is connected to the rotating shaft through the heat insulation sleeve.

[0011] The connector also includes a coupling and a connecting shaft. One end of the coupling is connected to the output end of the motor, and the other end of the coupling is connected to the connecting shaft. The connecting shaft is keyed to the end of the heat insulation sleeve. The output end of the motor is connected to the heat insulation sleeve via the coupling.

[0012] The length of the heat insulation sleeve is greater than 10cm, and the material of the heat insulation sleeve is plastic.

[0013] The beneficial effects of this utility model are:

[0014] This invention uses the combination of the arc-shaped part and the straight part of the blade to artificially create a bend in the middle of the blade. Water is directed out at this position, and the root of the blade at this position is located in the middle section of the blade as a whole, which has a good fixing effect and can avoid stress concentration and breakage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the impeller structure;

[0018] In the attached diagram, 1 is the motor, 2 is the pump casing, 3 is the impeller, 4 is the impeller disc, 5 is the main blade, 501 is the first arc-shaped section, 502 is the first straight section, 6 is the auxiliary blade, 601 is the second arc-shaped section, 602 is the second straight section, 7 is the reinforcing rib, 8 is the rotating shaft, 9 is the heat insulation sleeve, 10 is the coupling, and 11 is the connecting shaft. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] Specific embodiments, such as Figure 1-3As shown, this utility model provides a high-efficiency circulating cooling water pump, including a pump body, a motor 1, and a connecting component. The pump body includes a pump casing 2 and an impeller 3. The impeller 3 is disposed in the pump cavity of the pump casing 2. The pump cavity has a disc-shaped structure, with an inlet at the end of the disc surface and an outlet along the tangential direction on the annular side of the disc surface. The output end of the motor 1 is connected to the shaft of the impeller 3 via the connecting component. The impeller 3 includes a conical disc 4 and a flow guiding component disposed on the conical surface of the disc 4. The conical tip of the disc 4 faces the inlet. The flow guiding end of the flow guiding component near the inlet has an arc-shaped structure, and the fixed end of the flow guiding component near the outlet has a straight structure.

[0021] The existing cooling water pump blades are arc-shaped. With the help of the impeller 3 rotating, the water flows along the conical surface of the impeller 4 and is thrown out of the impeller 3 tangentially under the action of centrifugal force, thus forming water outlet. The water output position of the arc-shaped blades is concentrated at the arc-shaped end. In addition, the diameter of the arc-shaped end is the largest and the linear velocity is the highest, which easily causes wear at the end of the arc-shaped blades.

[0022] Therefore, this utility model artificially creates a bend in the middle of the blade by combining the arc-shaped part and the straight part of the blade. Water is discharged at this position, and the root of the blade at this position is located in the middle section of the blade as a whole, which has a good fixing effect, avoids stress concentration, and avoids breakage.

[0023] like Figure 3 As shown, the flow guiding assembly includes a main blade 5 and an auxiliary blade 6, which are alternately arranged circumferentially along the impeller 3. The main blade 5 includes a first arcuate portion 501 and a first straight portion 502, and the auxiliary blade 6 includes a second arcuate portion 601 and a second straight portion 602. The first arcuate portion 501 and the second arcuate portion 601 together form the flow guiding end of the flow guiding assembly. The first arcuate portion 501 is longer than the second arcuate portion 601. The first straight portion 502 and the second straight portion 602 together form the fixed end of the flow guiding assembly. The first straight portion 502 and the second straight portion 602 have the same length.

[0024] Compared to the traditional impeller with its densely arranged blades, the wide spacing of the main blades 5 in this invention increases the cross-sectional area of ​​the water flow in a single main channel, thereby increasing the rated water intake of the pump body and preventing a decrease in cooling efficiency due to insufficient water intake. Meanwhile, the auxiliary blades 6 can divide the large flow of water between adjacent main blades 5 into two smaller flow streams, preventing the water flow from shifting left and right between the main blades 5 due to excessive width of a single flow stream, thus reducing turbulence intensity, reducing turbulence energy loss, and improving water transport efficiency.

[0025] In addition, when the water flows in from the inlet, it first contacts the front end of the first arc-shaped part 501 of the main blade 5, changing the flow direction. Then, the water flows to the middle and is split by the front end of the second arc-shaped part 601 of the auxiliary blade 6. Finally, under the joint constraint of the first straight part 502 and the second straight part 602, the water flows out of the impeller 3 at a stable angle. This stepped path disperses the process of changing the water flow direction at multiple nodes, avoiding the energy loss caused by a one-time large-angle turn in the traditional impeller 3 design, and further reducing the loss of water flow energy.

[0026] The direction of the extension line of the input end of the first arc-shaped part 501 forms an angle of 20-30° with the water inlet direction of the impeller 3.

[0027] If the angle is too small, the input end of the arc section is too gentle, and the water flow is prone to sliding along the arc surface, resulting in kinetic energy loss; if the angle is too large, the input end of the arc section is too steep, and the water flow has a rigid impact with the arc surface, which aggravates turbulence.

[0028] The fixed end of the flow guiding component is provided with reinforcing ribs 7 on both sides, and the two sides of the reinforcing ribs 7 are fixedly connected to the fixed end of the flow guiding component and the wheel 4, respectively.

[0029] The reinforcing rib 7 provides lateral support to the fixed end of the flow guiding component, preventing lateral deformation and tilting of the fixed end caused by water flow impact, and improving structural strength.

[0030] The connecting component includes a rotating shaft 8 and a heat insulation sleeve 9. The fixed end of the rotating shaft 8 is fixedly connected to the shaft center of the impeller 3. The two ends of the heat insulation sleeve 9 are respectively keyed to the transmission end of the rotating shaft 8 and the output end of the motor 1. The output end of the motor 1 is connected to the rotating shaft 8 through the heat insulation sleeve 9.

[0031] In chemical production, the motor 1 generates significant heat during operation. In traditional direct drive systems, this heat is transferred to the impeller 3 via the output shaft, causing the impeller 3 to overheat and consequently affecting the temperature stability of the coolant inside the pump casing 2. Therefore, this invention includes a heat insulation sleeve 9. The heat insulation sleeve 9 not only blocks the heat transfer path between the output shaft of the motor 1 and the rotating shaft 8 but also increases the distance between the pump body and the motor 1, ensuring that the coolant temperature is not affected by the heat from the motor 1.

[0032] The connecting component also includes a coupling 10 and a connecting shaft 11. One end of the coupling 10 is connected to the output end of the motor 1, and the other end of the coupling 10 is connected to the connecting shaft 11. The connecting shaft 11 is keyed to the end of the heat insulation sleeve 9. The output end of the motor 1 is connected to the heat insulation sleeve 9 via the coupling 10.

[0033] The length of the heat insulation sleeve 9 is greater than 10cm, and the material of the heat insulation sleeve 9 is plastic.

[0034] The heat insulation sleeve 9 is made of plastic, which has a low thermal conductivity. The heat insulation sleeve 9 is longer than 10cm, which can extend the heat transfer path and prevent the heat from the motor 1 from being transferred to the pump body.

Claims

1. A high-efficiency circulating cooling water pump, comprising a pump body, a motor (1), and a connecting member, wherein the pump body comprises a pump casing (2) and an impeller (3), the impeller (3) being disposed in the pump cavity of the pump casing (2), the pump cavity having a disc-shaped structure, an inlet being disposed at the end of the disc surface, and an outlet being disposed along the tangential direction on the annular side surface of the disc surface, the output end of the motor (1) being connected to the shaft of the impeller (3) via the connecting member, characterized in that, The impeller (3) includes a cone-shaped disc (4) and a flow guide assembly disposed on the cone-shaped surface of the disc (4). The cone tip of the disc (4) faces the water inlet. The flow guide assembly has an arc-shaped end near the water inlet and a straight end near the water outlet.

2. The high-efficiency circulating cooling water pump according to claim 1, characterized in that, The flow guiding assembly includes a main blade (5) and a secondary blade (6). The main blade (5) and the secondary blade (6) are alternately arranged in the circumferential direction along the impeller (3). The main blade (5) includes a first arcuate portion (501) and a first straight portion (502). The secondary blade (6) includes a second arcuate portion (601) and a second straight portion (602). The first arcuate portion (501) and the second arcuate portion (601) together form the flow guiding end of the flow guiding assembly. The first arcuate portion (501) is longer than the second arcuate portion (601). The first straight portion (502) and the second straight portion (602) together form the fixed end of the flow guiding assembly. The first straight portion (502) and the second straight portion (602) are of equal length.

3. The high-efficiency circulating cooling water pump according to claim 2, characterized in that, The direction of the extension line of the input end of the first arc-shaped part (501) forms an angle of 20-30° with the water inlet direction of the impeller (3).

4. The high-efficiency circulating cooling water pump according to claim 1, characterized in that, The fixed end of the flow guiding component is provided with reinforcing ribs (7) on both sides, and the two sides of the reinforcing ribs (7) are fixedly connected to the fixed end of the flow guiding component and the wheel (4) respectively.

5. A high-efficiency circulating cooling water pump according to claim 1, characterized in that, The connecting component includes a rotating shaft (8) and a heat insulation sleeve (9). The fixed end of the rotating shaft (8) is fixedly connected to the shaft of the impeller (3). The two ends of the heat insulation sleeve (9) are keyed to the transmission end of the rotating shaft (8) and the output end of the motor (1), respectively. The output end of the motor (1) is connected to the rotating shaft (8) by means of the heat insulation sleeve (9).

6. A high-efficiency circulating cooling water pump according to claim 5, characterized in that, The connector also includes a coupling (10) and a connecting shaft (11). One end of the coupling (10) is connected to the output end of the motor (1), and the other end of the coupling (10) is connected to the connecting shaft (11). The connecting shaft (11) is keyed to the end of the heat insulation sleeve (9). The output end of the motor (1) is connected to the heat insulation sleeve (9) via the coupling (10).

7. A high-efficiency circulating cooling water pump according to claim 5, characterized in that, The length of the heat insulation sleeve (9) is greater than 10cm, and the material of the heat insulation sleeve (9) is plastic.

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