Pump body structure with main shaft capable of being disassembled downwards

Abstract

The utility model discloses a pump body structure with a detachable main shaft, which comprises a water outlet elbow, a middle connecting pipe, a guide vane body, a runner chamber and a water inlet horn which are sequentially connected from top to bottom, and a main shaft of which one end penetrates through the water outlet elbow to be connected with a motor shaft and the other end extends into the runner chamber to be connected with a runner part, the water outlet bent pipe comprises an upper bent pipe and a lower bent pipe which are connected in a sectional mode, the upper bent pipe and the lower bent pipe can be arranged in half, the main shaft comprises an upper pump shaft and a lower pump shaft which are connected in a sectional mode, and grooves are formed in the upper end portions of the upper pump shaft and the lower pump shaft respectively. The pump body structure is suitable for an axial flow pump or a mixed flow pump, the main shaft and the water outlet elbow pipe are arranged in a segmented mode, and the groove is formed in the main shaft arranged in the segmented mode, so that the upper pump shaft and / or the lower pump shaft are / is fixed to the pump body through the clamping plate matched with the groove in the detaching process, and then the water outlet elbow pipe is detached. Therefore, the motor and the guide vane body do not move when the water pump layer is dismounted, the workload of unit installation is greatly reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of water pumps, and in particular relates to a pump body structure with a detachable main shaft. Background Technology

[0002] Mixed-flow pumps generate centrifugal force and thrust through the rotation of an impeller, drawing liquid into the pump body from the inlet and then accelerating and discharging it through the action of the impeller. The impeller of a mixed-flow pump has both oblique blades and axial blades, which allows the liquid to generate both centrifugal force and axial thrust inside the impeller, thereby achieving high head and flow rate handling capacity.

[0003] An axial flow pump works by generating thrust through the rotation of an impeller, propelling the liquid axially. After entering the pump body through the inlet, the impeller's rotation accelerates and pushes the liquid out, achieving high flow rate processing. The impeller of an axial flow pump mainly consists of axial blades, which generate thrust within the impeller, but with relatively low centrifugal force.

[0004] Mixed-flow pumps and axial-flow pumps are common types of water pumps, widely used in industrial and agricultural fields. As important fluid transport equipment, both mixed-flow and axial-flow pumps require regular inspection and maintenance to ensure safe and normal operation during application. Generally, during pump station installation or maintenance, the pump shaft is moved from the motor pit into the pump body for installation. Disassembly involves removing the motor rotor or dismantling the motor, removing other pump components, and hoisting the pump shaft out of the pump body – this is known as top-down disassembly. In reality, reinstalling the motor after movement involves a significant amount of work; the motor shaft centerline and the bearing stop on the guide vane must be readjusted to ensure concentricity. Furthermore, some pump stations are space-constrained, preventing top-down disassembly of the pump shaft and thus limiting motor movement.

[0005] Based on this, we are now studying a pump body structure that can realize the main shaft removal, which is suitable for both axial flow pumps and mixed flow pumps. The removal means that the pump shaft is removed from the pump layer, but the motor and the guide vane do not move, so as to greatly reduce the workload of unit installation and improve work efficiency. Utility Model Content

[0006] Purpose of the utility model: The technical problem to be solved by this utility model is to provide a pump body structure that allows for the removal of the main shaft, thereby greatly reducing the workload of unit installation and improving work efficiency.

[0007] Technical solution: The main shaft of this utility model is a pump body structure with a detachable main shaft, including a water outlet bend, an intermediate connecting pipe, a guide vane, a rotor chamber and a water inlet horn connected sequentially from top to bottom, and a main shaft with one end passing through the water outlet bend and connected to the motor shaft, and the other end extending into the rotor chamber and connected to the rotor component. The water outlet bend includes a segmented upper bend and a lower bend, and the main shaft includes a segmented upper pump shaft and a lower pump shaft, and the upper ends of the upper pump shaft and the lower pump shaft are respectively provided with grooves.

[0008] Furthermore, the upper pump shaft of the pump body structure is connected to the motor shaft by hinged bolts or ordinary bolts combined with locking pins.

[0009] Furthermore, the upper and lower pump shafts of the pump body structure are connected as a whole by hinged screw bolts or by sleeve connectors.

[0010] Furthermore, the upper and lower bends of the pump body structure are connected as one unit by bolts and positioning pins, and the upper and lower bends can be configured as a half-structure.

[0011] Furthermore, the pump body structure has an upper guide bearing at the outlet shaft of the water outlet bend, and a lower guide bearing inside the guide vane body.

[0012] Furthermore, the lower pump shaft at the front end of the lower guide bearing of the pump body structure passes through the guide cone inside the guide vane body and connects to the impeller component in the impeller chamber.

[0013] Furthermore, the pump body structure has an access door on the intermediate connecting pipe so that operators can enter the pump body to operate and disassemble the main shaft bolts inside the pump body.

[0014] Beneficial effects: Compared with the prior art, the advantages of this utility model are as follows: The pump body structure with a detachable main shaft is suitable for axial flow pumps or mixed flow pumps. By adopting segmented settings for both the main shaft and the outlet bend, and setting grooves on the segmented main shaft, the upper pump shaft and / or lower pump shaft can be fixed to the pump body first by using a clamping plate that matches the groove during disassembly. This allows the motor and guide vane body to remain stationary during pump layer removal, greatly reducing the workload of unit installation and improving work efficiency. Attached Figure Description

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

[0016] Figure 2 For based on Figure 1 A schematic diagram of the structure after disassembling the inlet horn and the impeller chamber;

[0017] Figure 3 For based on Figure 2A schematic diagram showing the structure after disassembling the main shaft seal, upper guide bearing, lower guide bearing, and guide cone; removing the bolts connecting the water pump and motor shafts; and installing the matching clamping plate for the upper pump shaft.

[0018] Figure 4 Based on Figure 3 A schematic diagram of the structure after disassembling the bend and installing the matching clamping plate for the lower pump shaft;

[0019] Figure 5 Based on Figure 4 A schematic diagram of the structure after disassembling the upper pump shaft;

[0020] Figure 6 Based on Figure 5 A schematic diagram of the structure after the pump shaft has been removed. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings.

[0022] The key to achieving this detachable main shaft design lies in the optimized and improved structure of the outlet bend 1 and the main shaft 7. Therefore, it is applicable to both axial flow pumps and mixed flow pumps with different guide vane body 3 structures.

[0023] Specifically, such as Figure 1 As shown, the main shaft 7 of this utility model is a detachable pump body structure, including a water outlet bend 1 connected to the guide vane body 3 via an intermediate connecting pipe 2. The water outlet bend 1 adopts a two-section connection method, that is, the water outlet bend 1 is composed of an upper bend 8 and a lower bend 9, which are connected as one piece by bolts and positioning pins. To facilitate the disassembly of the upper pump shaft, the upper bend and the lower bend can be set as a half-structure.

[0024] The guide vane body 3 is connected to the impeller chamber 4. The guide vane body 3 has a guide cone 15 inside, and the impeller chamber 4 has an impeller component 16 inside. The end of the impeller chamber 4 is connected to the water inlet horn 5. The structure of the guide vane body 3 and the impeller chamber 4 is a known existing structure, and will not be described further in this utility model.

[0025] The main shaft 7 of the pump body structure has one end passing through the outlet bend 1 and connected to the motor shaft 6 of the motor 18 via a hinged bolt or a regular bolt + retaining pin; the other end passes through the guide cone 15 assembled inside the guide vane body 3 and is connected to the impeller component 16 in the impeller chamber 4. Crucially, the main shaft 7 also adopts a segmented structure, comprising an upper pump shaft 10 and a lower pump shaft 11, which are connected by hinged bolts or by a sleeve connector to form a single unit. Both the upper pump shaft 10 and the lower pump shaft 11 have grooves 12 at their upper ends to facilitate fixing to the pump body via these grooves and matching retaining plates. An upper guide bearing 13 is provided at the outlet shaft of the water outlet bend 1, and a lower guide bearing 14 is provided inside the guide vane body 3. The upper pump shaft 10 is connected to the motor shaft 6, and the lower pump shaft 11 passes through the guide cone 15 inside the guide vane body 3 and is connected to the impeller component 16 inside the impeller chamber 4.

[0026] In addition to the above, the intermediate connecting pipe 2 of the pump body structure of this utility model is provided with an access door 16 so that operators can enter the pump body to operate and disassemble the main shaft bolts inside the pump body.

[0027] Based on this pump body structure, the installation, disassembly, and maintenance procedures include the following steps:

[0028] (1) Remove the water inlet horn 5 and the rotating chamber 4, such as Figure 2 As shown;

[0029] (2) Separate the motor shaft 6 from the upper pump shaft 10, move the upper pump shaft 10 and lower pump shaft 11 downwards, and use the matching spindle positioning tool clamp to clamp the upper pump shaft 10 in the groove to fix the upper pump shaft 10 to the pump body. Disassemble the impeller assembly 16, as follows: Figure 3 As shown;

[0030] (3) Divide the upper bend 8 and lower bend 9 of the outlet bend 1 in half to separate the two pump shaft sections. Use the matching spindle positioning tool clamp to clamp the lower pump shaft 11 into the groove 12, and fix the lower pump shaft 11 onto the pump body. Figure 4 As shown;

[0031] (4) Remove the upper pump shaft 10, as follows: Figure 5 As shown;

[0032] (5) Remove the lower pump shaft 11 from the intermediate connecting pipe 2, or remove the lower pump shaft 11 from under the guide vane body 3, such as Figure 6 As shown, this demonstrates the method of removing the main shaft from the pump body structure.

Claims

1. A pump body structure with a detachable main shaft, comprising, from top to bottom, a water outlet bend (1), an intermediate connecting pipe (2), a guide vane (3), a rotor chamber (4), and a water inlet horn (5), and a main shaft (7) having one end passing through the water outlet bend (1) and connected to the motor shaft (6), and the other end extending into the rotor chamber (4) and connected to the rotor assembly (16), characterized in that: The outlet bend (1) includes a segmented upper bend (8) and a lower bend (9), and the main shaft (7) includes a segmented upper pump shaft (10) and a lower pump shaft (11), with grooves (12) respectively provided at the upper ends of the upper pump shaft (10) and the lower pump shaft (11).

2. The pump body structure with a detachable main shaft according to claim 1, characterized in that, The upper pump shaft (10) and the motor shaft (6) are connected by hinge bolts or ordinary bolts combined with snap pins.

3. The pump body structure with a detachable main shaft according to claim 1, characterized in that, The upper pump shaft (10) and the lower pump shaft (11) are connected by hinged screw bolts or by sleeve connectors to form a whole.

4. The pump body structure with a detachable main shaft according to claim 1, characterized in that, The upper bend (8) and the lower bend (9) are connected as one unit by bolts and positioning pins. The upper bend and the lower bend can be set as a half-structure.

5. The pump body structure with a detachable main shaft according to claim 1, characterized in that, The outlet bend is provided with an upper guide bearing (13) at the outlet shaft, and a lower guide bearing (14) is provided inside the guide vane body.

6. The pump body structure with a detachable main shaft according to claim 5, characterized in that, The lower pump shaft (11) at the front end of the lower guide bearing (14) is connected sequentially along its end to the guide cone (15) inside the guide vane body (3) and the impeller component (16) inside the impeller chamber (4).

7. The pump body structure with a detachable main shaft according to claim 1, characterized in that, An access door (17) is provided on the intermediate connecting pipe (2) so that operators can enter the pump body to operate and disassemble the main shaft bolts inside the pump body.

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