A vertical shaft tubular pump with a right-angle gear box transmission motor arranged on top

Abstract

The utility model discloses a vertical shaft tubular pump of right angle gear box transmission motor upper -placed, it is located in the vertical shaft, the vertical shaft is equipped with the vertical shaft flow channel of transverse, the vertical shaft flow channel is divided into tail, pump section installation channel and round square gradual change flow channel, the pump section is installed in the pump section installation channel, the pump section includes pump shaft, impeller and guide vane, sets up the installation space above the tail, and the installation space top sets up the repair entry, sets up the motor mounting beam in the installation space, the vertical motor is installed on the motor mounting beam, the vertical motor is connected with the input shaft of a right angle gear box through a first coupling, and the output shaft of right angle gear box is connected with a bearing box through second coupling, and the bearing box connects the pump section, and the input shaft of right angle gear box and the output is 90 DEG setting.

Description

Technical Field

[0001] This utility model relates to the field of fluid machinery technology, and more specifically, to a vertical shaft axial flow pump with a right-angle gearbox driven motor mounted on top. Background Technology

[0002] The vertical shaft axial flow pump has straight inlet and outlet channels, resulting in low head loss and requiring minimal excavation depth for the pumping station. The parallel shaft reduction gearbox and motor are all housed within an open vertical shaft, providing superior ventilation and moisture protection compared to submersible axial flow pumps, bulb axial flow pumps, and full axial flow pumps. Operation and maintenance are convenient, and the unit has a simple structure, making it particularly suitable for low-head, high-flow pumping stations in plains areas.

[0003] See Figure 1 and Figure 2 The diagram shows a traditional vertical shaft axial flow pump. A horizontal motor 10 is installed in the vertical shaft flow channel 1, which is connected to a parallel shaft gearbox 7 via a coupling 9. The output shaft of the parallel shaft gearbox 7 is connected to the pump shaft 4 via a coupling 6, causing the pump shaft 4 to rotate, which in turn drives the impeller 12 in the pump section 2 to rotate.

[0004] In a standard layout, the largest component inside the shaft is the motor (as shown in the horizontal motor 10 in the figure). The maximum clear width of the shaft must take into account the motor size and the personnel maintenance access on both sides of the motor. When the single pump flow rate is less than 20m³ / h... 3 / s, especially close to 10m 3 When the speed is around / s, the motor has a particularly large impact on the size of the shaft. For example, a single pump of 10m 3 A vertical shaft axial flow pump with a capacity of / s, equipped with an 8-pole 10kV high-voltage asynchronous motor with a power of approximately 800kW and a frame size of 560, even with a rear-mounted junction box to reduce the motor's vertical water flow width to 1.7m, considering the cooling water pipe layout and maintenance access, the maximum net width of the shaft inner wall is approximately 2.90m, the net length is approximately 7m, the shaft flow channel width is 5.7m, and the height is 2.5m. If a more compact water-jacketed air-cooled motor is used, the motor width will be approximately 1.2m, and the maximum net width of the shaft inner wall will be reduced to 2. The vertical shaft remains 7m long, but the flow channel width is reduced to 5.4m. If a low-speed permanent magnet synchronous motor is used instead, eliminating the gearbox, the motor width is approximately 1.7m, still relatively large. The maximum net width of the shaft inner wall remains unchanged at 2.90m, but the net length can be shortened to 5.8m, while the flow channel width remains 5.7m. All three schemes result in a significantly wider flow channel than the 3.80m width of the circular-square gradient flow channel, with a length-to-width ratio at the flow channel inlet greater than 2, leading to poor flow conditions and high civil engineering investment. Furthermore, the motor's location within the vertical shaft exposes it to low elevation and high humidity, significantly impacting the insulation of the motor coils, requiring pre-start heating and drying. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a right-angle gearbox driven motor top-mounted vertical shaft axial flow pump. The purpose is to replace the traditional parallel shaft gearbox with a right-angle gearbox drive, and to move the motor, which is traditionally arranged in the vertical shaft, to the top of the vertical shaft, thereby reducing the number of equipment in the vertical shaft, reducing the space requirements in the vertical shaft and the footprint of the vertical shaft flow channel. At the same time, raising the motor from the pit improves the motor's operating environment and facilitates operation and maintenance.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] A right-angle gearbox driven motor-mounted vertical shaft axial flow pump is installed inside a vertical shaft. The vertical shaft has a transverse flow channel, which is divided into a tail section, a pump section installation channel, and a gradually changing circular-square flow channel. The pump section is installed in the pump section installation channel and includes a pump shaft, impeller, and guide vanes. An installation space is provided above the tail section, and a maintenance access is provided at the top of the installation space. A motor mounting beam is provided in the installation space. A vertical motor is installed on the motor mounting beam and is connected to the input shaft of a right-angle gearbox via a first coupling. The output shaft of the right-angle gearbox is connected to a bearing housing via a second coupling, and the bearing housing is connected to the pump section. The input shaft and output shaft of the right-angle gearbox are set at 90°.

[0008] Preferably, the vertical motor can be a high-speed asynchronous motor, a high-speed synchronous motor, or a low-speed permanent magnet synchronous motor.

[0009] Preferably, the right-angle gearbox is configured to either reduce speed or not reduce speed based on the difference between the motor speed and the water pump speed.

[0010] Preferably, the impeller is installed behind or in front of the guide vane in the direction of water flow.

[0011] By adopting the above technical solution, the size of the shaft can be significantly reduced compared with the prior art, saving investment. At the same time, by raising the motor from the pit in the traditional shaft, the impact of water accumulation and humidity in the pit on the insulation of the motor windings is reduced, heat dissipation conditions are improved, and the inspection, operation and maintenance of the motor no longer need to be carried out in the shaft, which improves convenience. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the longitudinal section of a traditional vertical shaft axial flow pump.

[0013] Figure 2 This is a schematic diagram of the flow channel layer of a traditional vertical shaft axial flow pump.

[0014] Figure 3 This is a schematic longitudinal section of the motor-mounted vertical shaft axial flow pump described in this invention.

[0015] Figure 4 This is a schematic diagram of the flow channel layer of the motor-mounted vertical shaft axial flow pump described in this invention.

[0016] Figure 5 This is a schematic diagram of the upper plan of the flow channel of the motor-mounted vertical shaft axial flow pump described in this invention.

[0017] In the attached diagram:

[0018] 1-Tail section; 2-Pump section mounting channel; 3-Rounded flow channel (round to square); 4-Pump shaft; 5-Bearing housing; 6-Second coupling; 7-Parallel shaft gearbox; 8-Right angle gearbox; 9-First coupling; 10-Horizontal motor; 11-Vertical motor; 12-Impeller; 13-Guide vane; 14-Motor mounting beam; 15-Pump section; 16-Installation space; 17-Maintenance access port Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] join Figures 3 to 5 As shown, in this embodiment, the right-angle gearbox driven motor top-mounted vertical shaft axial flow pump is installed inside the vertical shaft.

[0021] The vertical shaft is equipped with a transverse vertical shaft flow channel, which is divided into a tail section 1, a pump section installation channel 2, and a round-square transition flow channel 3. A pump section 15 is installed within the pump section installation channel 2, and the pump section 15 includes a pump shaft 4, an impeller 12, and guide vanes 13. An installation space 16 is provided above the tail section 1 of the vertical shaft flow channel. A maintenance access port 17 is provided at the top of the installation space 16. A motor mounting beam 14 is provided within the installation space 16. A vertical motor 11 is mounted on the motor mounting beam 14. The vertical motor 11 is connected to the input shaft of a right-angle gearbox 8 via a first coupling 9. The output shaft of the right-angle gearbox 8 is connected to a bearing housing 5 via a second coupling 6. The bearing housing 5 is connected to the pump section 15. The input shaft and output shaft of the right-angle gearbox 8 are set at a 90° angle.

[0022] The vertical motor 11 is installed on the motor mounting beam 14 above the tail end 1 of the vertical shaft flow channel. It is connected to the right angle gearbox 8 through the first coupling 9. The output shaft of the right angle gearbox 8 is connected to the pump shaft 4 through the coupling 6, so that the pump shaft 4 rotates and drives the impeller 12 in the pump section 2 to rotate.

[0023] An installation space 16 is set above the tail end 1 of the vertical shaft flow channel. The motors that are traditionally arranged in the vertical shaft are moved to the top of the vertical shaft, thereby reducing the number of equipment in the vertical shaft, reducing the space requirements in the vertical shaft and the footprint of the vertical shaft flow channel. At the same time, the motors are lifted out of the pit, which improves the motor operating environment and facilitates operation and maintenance.

[0024] The vertical motor 1 can be a high-speed asynchronous motor, a high-speed synchronous motor, or a low-speed permanent magnet synchronous motor. The right-angle gearbox 8 is selected to have either a speed reduction or no speed reduction type based on the difference between the motor speed and the water pump speed.

[0025] The pump shaft 4 adopts a double-support structure. The pump shaft 4 has a bearing housing 5 for fixing the bearing operation on the side near the second coupling 6, and a guide bearing is set in the internal structure of the guide vane 13 on the side near the impeller 12. The impeller 12 can be placed in front of the guide vane 13 or behind the guide vane 13 in the direction of water flow.

[0026] Compared with existing technologies, this invention can significantly reduce the size of the shaft. Taking the existing method of arranging a water-jacketed air-cooled motor inside the shaft as an example, this invention uses a right-angle gearbox drive. After the motor is moved to the top of the shaft, the maximum net width of the shaft wall (2.60m) and net length (7m) can be significantly reduced to 2.20m and 5m, thus reducing the width and length of the shaft flow channel and saving investment. At the same time, by raising the motor from the pit in the traditional shaft, the impact of water accumulation and humidity in the pit on the insulation of the motor windings is reduced, heat dissipation conditions are improved, and the inspection, operation, and maintenance of the motor no longer require going down into the shaft, improving convenience.

[0027] The embodiments described above are for illustrative purposes only and are not intended to limit the scope of this utility model. All equivalent changes and modifications made to this utility model by those skilled in the art should fall within the scope of the appended claims.

Claims

1. A right-angle gearbox driven motor-mounted vertical shaft axial flow pump, which is installed inside a vertical shaft, wherein the vertical shaft has a transverse vertical shaft flow channel, the vertical shaft flow channel being divided into a tail section, a pump section installation channel, and a round-square gradually changing flow channel; the pump section is installed in the pump section installation channel, the pump section including a pump shaft, an impeller, and guide vanes, characterized in that, An installation space is provided above the tail section, and a maintenance access is provided at the top of the installation space; a motor mounting beam is provided within the installation space; A vertical motor is mounted on the motor mounting beam. The vertical motor is connected to the input shaft of a right-angle gearbox via a first coupling. The output shaft of the right-angle gearbox is connected to a bearing housing via a second coupling. The bearing housing is connected to the pump section. The input shaft of the right-angle gearbox is set at 90° to the output shaft.

2. The right-angle gearbox driven motor-mounted vertical shaft axial flow pump according to claim 1, characterized in that, The vertical motor can be a high-speed asynchronous motor, a high-speed synchronous motor, or a low-speed permanent magnet synchronous motor.

3. The right-angle gearbox driven motor-mounted vertical shaft axial flow pump according to claim 1, characterized in that, The right-angle gearbox can be configured to reduce speed or not based on the difference between the motor speed and the water pump speed.

4. The right-angle gearbox driven motor-mounted vertical shaft axial flow pump according to claim 1, characterized in that, The impeller is installed behind or in front of the guide vane in the direction of water flow.

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