Vibration-resistant and cavitation-resistant double suction pump

Abstract

The utility model designs a vibration-resistant cavitation-resistant double-suction pump, which comprises a double-suction pump and is characterized in that the double-suction pump is mounted on a base, first rib plates extending downwards are arranged below the front and rear surfaces of a middle opening surface of the double-suction pump, second rib plates extending downwards are arranged below the front and rear surfaces of a bearing mounting seat, and the first rib plates and the second rib plates are arranged on the base. The bottom ends of the first rib plates and the second rib plates on the two sides are connected with pump feet which are horizontally arranged, and mounting holes are formed in the pump feet; pump foot mounting plates are arranged on the two sides of the base, the pump foot mounting plates are connected to the surface of the base through pump foot vertical ribs, supporting ribs are arranged on the sides of the pump foot mounting plates, mounting threaded holes are formed in the pump foot mounting plates, and the mounting threaded holes correspond to mounting holes formed in pump feet in a one-to-one mode. And the pump foot of the double-suction pump is screwed in the mounting threaded hole in the pump foot mounting plate by a screw through the mounting hole in the pump foot. The utility model has the advantage that the installation height of the double suction pump is reduced. The center of mass is closer to the ground and is stable and vibration-proof; the net positive suction head of the device is increased, and pump cavitation conditions are improved.

Description

Technical Field

[0001] The utility model relates to a vibration-resistant and cavitation-resistant double-suction pump. Background Art

[0002] Double suction pumps are widely used. The existing conventional double suction pumps are installed by pump feet. For pump foot installation, please refer to Figure 1 , 21 pump body 22 pump foot 23 middle open surface, the pump foot is located at the lowest part of the pump body. Some application fields require single-stage high head and low installation height. Single-stage high head is easy to cause pump vibration, and low installation height corresponds to low cavitation margin of the device. Conventional double-suction pumps need to thicken the base and wall thickness to solve the vibration problem; the pump body and pump cover need to be re-moulded to increase the thickness and improve the overall stiffness of the pump to solve the vibration problem; the impeller is redesigned and opened to increase the impeller inlet diameter to slow down the blade inlet flow rate and reduce the necessary cavitation margin. The above measures correspond to long production cycles and high manufacturing costs. It is urgent to design a double-suction pump to solve the above problems. Utility Model Content

[0003] The purpose of this utility model patent is to design a double-suction pump support structure to lower the installation height of the double-suction pump to solve the vibration and cavitation problems of the double-suction pump. The utility model designs a vibration-resistant and cavitation-resistant double-suction pump, including a double-suction pump, characterized in that the double-suction pump is installed on a base, and the double-suction pump is provided with a first rib plate extending downward below the front and rear surfaces of the middle opening, and a second rib plate extending downward below the front and rear surfaces of the bearing mounting seat, and the bottom ends of the first rib plate and the second rib plate on both sides are connected with horizontally arranged pump feet, and the pump feet are provided with mounting holes; pump foot mounting plates are provided on both sides of the base, and the pump foot mounting plates are connected to the base surface by pump foot vertical ribs, and support ribs are provided on the sides, and mounting threaded holes are provided on the pump foot mounting plates, and the mounting threaded holes correspond to the mounting holes provided on the pump feet one by one, and the pump feet of the double-suction pump are screwed into the mounting threaded holes on the pump foot mounting plate by screws through the mounting holes on the pump feet. A top screw block is installed on the outer side of the pump foot mounting plate to abut against the pump feet. The pump foot is located at the lower part of the pump center opening and the upper part of the pump body flange surface, between the two. The advantages of the utility model are: the main highlight of this new structure is to change the position of the pump foot of the double suction pump, and improve the supporting base structure, which effectively reduces the installation height of the double suction pump. After the improvement, the center of mass of the pump is closer to the ground, and the operation is stable and vibration-resistant; after the improvement, the installation height is reduced, the cavitation margin of the device is increased, and the cavitation conditions of the pump are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 It is a structural schematic diagram of the prior art.

[0005] Figure 2 It is a structural schematic diagram of the utility model.

[0006] Figure 3 for Figure 2Schematic diagram of the structure of the lower half along the middle open surface.

[0007] Figure 4 for Figure 3 AA cross-section diagram of .

[0008] Figure 5 It is a schematic diagram of the base structure of the utility model.

[0009] Figure 6 for Figure 5 Top view of the .

[0010] Figure 7 It is a comparison diagram of the installation positions of the prior art and the utility model. DETAILED DESCRIPTION

[0011] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0012] A vibration-resistant and cavitation-resistant double-suction pump in the figure includes a double-suction pump 1, characterized in that the double-suction pump is installed on a base 2, and the double-suction pump is provided with a first rib plate 4 extending downward below the front and rear surfaces of the middle opening surface 3, and a second rib plate 5 extending downward below the front and rear surfaces of the bearing mounting seat 13, and the bottom ends of the first rib plate and the second rib plate on both sides are connected with horizontally arranged pump feet 6, and the pump feet are provided with mounting holes 7; pump foot mounting plates 8 are provided on both sides of the base, and the pump foot mounting plates are connected to the base surface by pump foot vertical ribs 9, and support ribs 10 are provided on the sides, and mounting threaded holes 11 are provided on the pump foot mounting plates, and the mounting threaded holes correspond to the mounting holes provided on the pump feet one by one, and the pump feet of the double-suction pump are screwed into the mounting threaded holes on the pump foot mounting plates by screws (not shown in the figure) through the mounting holes on the pump feet. A top screw block 12 is installed on the outer side of the pump foot mounting plate to abut against the pump feet. The pump feet are located at the lower part of the middle opening surface of the pump and the upper part of the flange surface of the pump body, and are between the two.

[0013] The top screw block is aligned with the outside of the pump foot of the pump body, so that the pump foot mounting hole and the pump foot mounting thread are aligned. The pump foot vertical rib supports the weight of the entire pump, and the surrounding of the pump foot vertical rib is designed to strengthen the strength. The support ribs are lower than the bottom of the pump body to prevent the two from touching.

[0014] For comparison of installation height between original structure and new structure, see Figure 5. It is obvious that the height of the center open surface under the new structure is lower than that of the original structure. The principle of lowering the position of the center open surface: ensure that the flange closest to the ground in the pump inlet or outlet flange is 100 mm higher than the ground; ensure that the pump inlet and outlet flanges are located outside the base. After the installation height is reduced, the center of mass of the pump decreases, and the vibration resistance of the pump is improved. The location of the center open surface is the location of the impeller center line. After the impeller center line position is lowered, the installation height is reduced, the cavitation margin of the device is increased, and the cavitation conditions are improved from the installation aspect.

Claims

1. A vibration-resistant and cavitation-resistant double-suction pump, comprising a double-suction pump, It is characterized in that The double-suction pump is installed on a base, and a first rib plate extending downward is provided below the front and rear surfaces of the central opening of the double-suction pump, and a second rib plate extending downward is provided below the front and rear surfaces of the bearing mounting seat, and the bottom ends of the first and second rib plates on both sides are connected with horizontally arranged pump feet, and mounting holes are provided on the pump feet; pump foot mounting plates are provided on both sides of the base, and the pump foot mounting plates are connected to the base surface by pump foot vertical ribs, and supporting ribs are provided on the sides, and mounting threaded holes are provided on the pump foot mounting plates, and the mounting threaded holes correspond to the mounting holes provided on the pump feet one by one, and the pump feet of the double-suction pump are screwed into the mounting threaded holes on the pump foot mounting plates through the mounting holes on the pump feet by screws.

2. A vibration-resistant and cavitation-resistant double-suction pump according to claim 1, It is characterized in that A top screw block is installed on the outer side of the pump foot mounting plate to abut against the pump foot.

3. A vibration-resistant and cavitation-resistant double-suction pump according to claim 1, It is characterized in that The pump foot is located at the lower part of the central opening of the pump and the upper part of the flange surface of the pump body, and is between the two.

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