Vertical shaft tubular pump with paddle adjusting device

Abstract

The invention discloses a vertical shaft tubular pump with a paddle adjusting device. The vertical shaft tubular pump comprises a pump body, a mounting block, a motor, an impeller shell, a plurality of blades, a transmission shaft, the adjusting device and a spring. The transmission shaft moves to drive the blades to rotate around the central axis so as to adjust the blade angle. The adjusting device drives the transmission shaft to move; the spring cooperates with the adjusting device to push the transmission shaft to move; when the blades are adjusted in the forward direction, the adjusting device drives the transmission shaft to move towards the motor, and the spring is extruded; when the blade angle is adjusted and the adjusting device drives the transmission shaft to move in the direction away from the motor, the spring pushes the other end of the transmission shaft to move in the direction away from the motor. By simplifying an oil way and optimizing a transmission structure, the adjustment stability is improved by 30%, and the manufacturing cost is reduced by 40%; in a drainage project of a certain city, after the water pump is adopted, the blade angle adjusting time is shortened to 45 minutes from 4 hours in a traditional scheme, and the phenomenon of pressure rod instability is avoided in the operation process.

Description

Technical Field

[0001] The present invention belongs to the technical field of water pumps, and particularly relates to a shaft tubular pump with a blade adjusting device. Background Art

[0002] The shaft tubular pump is evolved from the shaft tubular water turbine and is mainly applicable to low-lift and large-flow urban drainage and water diversion projects. There are three traditional forms of shaft tubular pumps: fixed-blade pumps, semi-adjustable blade pumps, and fully adjustable blade pumps.

[0003] For the shaft tubular pumps with three types of impellers, each has its own advantages and disadvantages. The fixed blade has poor adaptability, and for cases with large changes in head and flow rate, semi-adjustable impellers or fully adjustable blade impellers are generally used. The semi-adjustable impeller is most commonly used in the field of shaft tubular pumps, mainly because its structure is relatively simple, it can achieve the adjustment of working conditions, and there is no risk of oil leakage (compared with fully adjustable blade pumps).

[0004] If the semi-adjustable pumps are further subdivided, they can be divided into traditional semi-adjustable pumps, existing semi-adjustable pumps (worm and worm gear force transmission type), and new semi-adjustable pumps.

[0005] The first type: traditional semi-adjustable pumps: Although they have the above obvious advantages, each time the impeller needs to be hoisted out, the original positioning pins and fastening bolts need to be removed, and then repositioned and assembled. The replacement is inconvenient, and the workload is large, time-consuming and laborious. The second type: existing semi-adjustable pumps (worm and worm gear force transmission type), there is no risk of oil leakage, and the blade angle can be adjusted during shutdown; but the obvious disadvantages are mainly: First, limited by the machining accuracy and strength of the worm and worm gear, the operating force transmitted is limited, and it cannot be applied to pumps with larger impeller diameters; Second, due to structural requirements, compared with traditional semi-adjustable pumps, the length of the pump shaft is longer, and the problem of unstable pressure rod cannot be solved. Summary of the Invention

[0006] This part of the content of the present application is used to briefly introduce the concepts, which will be described in detail in the following detailed implementation part. This part of the content of the present application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0007] In order to overcome the deficiencies of the prior art, the present invention provides a shaft tubular pump with a blade adjusting device.

[0008] To achieve the above object, the present invention adopts the following technical solutions: A shaft tubular pump with a blade adjusting device, comprising: a pump body having an inlet water passage and an outlet water passage; an electric motor disposed on the inlet water passage within the pump body; a pump shaft driven to rotate by the electric motor; a plurality of blades connected to the pump shaft; a transmission shaft located within the pump shaft and capable of axially moving along the pump shaft, and when the transmission shaft axially moves, it drives the blades to rotate around the central axis of the blades to adjust the blade angle; wherein the axis of the blade is perpendicular to the central axis of the pump shaft; an adjusting device for driving the transmission shaft to axially move relative to the pump shaft; a spring cooperating with the adjusting device to push the transmission shaft to move; when the blade is adjusted in the positive direction, the adjusting device drives the transmission shaft to move towards the electric motor direction, and the spring is compressed; when the blade is adjusted in the reverse direction, when the adjusting device drives the transmission shaft to move away from the electric motor direction, the spring pushes the other end of the transmission shaft to move away from the electric motor direction.

[0009] Further, the shaft tubular pump with a blade adjusting device further comprises: a piston shaft connected to the transmission shaft; an operating frame connected to one end of the piston shaft; a fork head connected to the operating frame; a connecting plate, one end of which is rotatably connected to the fork head and the other end is rotatably connected to the blade; a crank arm is provided on the blade, and one end of the connecting plate is connected to the crank arm.

[0010] Further, the shaft tubular pump with a blade adjusting device further comprises: a spring seat sleeved on the operating shaft; a first rotating sleeve connected to one end of the operating shaft; the operating shaft and the piston shaft are connected together through the first rotating sleeve, and the spring is located between the spring seat and the first rotating sleeve, one end of the spring abuts against the spring seat, and the other end abuts against the first rotating sleeve.

[0011] Further, the shaft tubular pump with a blade adjusting device further comprises: a gear box connected to the output shaft of the electric motor; a high-speed end coupling disposed on one side of the gear box; a low-speed end coupling disposed on the other side of the gear box; a pump shaft connected to the low-speed end coupling; a cavity is provided on the low-speed connecting shaft, and the adjusting device is installed in the cavity.

[0012] Further, the adjusting device comprises: a servomotor disposed in the cavity; a servomotor piston rod connected to one end of the servomotor; an oil pump interface provided on the servomotor; a two-way hydraulic lock provided in the oil pump interface; the servomotor piston rod is connected to the transmission shaft.

[0013] Further, a displacement sensor is provided on the servomotor, and the detection head of the displacement sensor is connected to the servomotor piston rod.

[0014] Further, a thrust bearing and a radial bearing are provided on the pump shaft, and an adjusting shim is further provided on the other side of the pump shaft.

[0015] The advantages of the present invention are as follows: to provide a shaft tubular pump with a blade adjustment device that has a simple oil circuit, an optimized structure, stable adjustment, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings forming a part of this application are used to provide a further understanding of this application, making other features, objectives, and advantages of this application more obvious. The schematic embodiments and descriptions of the drawings of this application are used to explain this application and do not constitute an improper limitation of this application.

[0017] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic, and the elements and components are not necessarily drawn to scale.

[0018] In the drawings: Figure 1 is a schematic structural diagram of the shaft tubular pump with a blade adjustment device of the present invention.

[0019] Figure 2 is a schematic structural diagram of the hub body of the shaft tubular pump with a blade adjustment device of the present invention.

[0020] Figure 3 is a schematic structural diagram of the low-speed end coupling of the shaft tubular pump with a blade adjustment device of the present invention.

[0021] Figure 4 is a schematic structural diagram of the adjustment device of the shaft tubular pump with a blade adjustment device of the present invention.

[0022] Figure 5 is a schematic diagram of the cooperation between the blade and the fork head of the shaft tubular pump with a blade adjustment device of the present invention.

[0023] Figure 6 is a schematic diagram of the thrust bearing and the radial bearing of the shaft tubular pump with a blade adjustment device of the present invention.

[0024] The meanings of the reference numerals in the drawings are as follows: 1. Motor; 2. Gearbox; 3. High-speed end coupling; 4. Low-speed end coupling; 5. Adjustment device; 501. Second swivel sleeve; 502. Second stop block; 503. Servomotor; 504. Two-way hydraulic lock; 505. Servomotor flange seat; 506. Displacement sensor; 507. Servomotor piston rod; 508. Manual locking device; 509. Split connection flange; 510. Oil pump interface; 601. Thrust bearing; 602. Radial bearing; 603. Adjusting shim; 8. Pump shaft; 10. Impeller housing; 1101. Blade; 1102. Hub body; 1103. Sealing layer; 1104. Outer shaft sleeve; 1105. Rocker arm; 1106. Blade pin; 1107. Transmission shaft; 1108. Spring seat; 1109. Spring; 1110. First swivel sleeve; 1111. First stop block; 1112. Upper shaft sleeve; 1113. Connecting plate; 1114. Fork head; 1115. Operating frame; 1116. Piston shaft; 1117. Lower shaft sleeve; 1118. Guide block; 1119. Inner shaft sleeve; 13. Guide vane cone; 14. End cover; 15. Inlet water passage; 16. Outlet water passage; 17. Pump body; 18. Mounting block. Detailed implementation manners

[0025] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0026] In addition, it should be noted that for the sake of convenience of description, only parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0027] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order of functions executed by these devices, modules or units or their interdependent relationships.

[0028] It should be noted that the modifications of "one" and "plural" mentioned in the present disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0029] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only for illustrative purposes and are not used to limit the scope of these messages or information.

[0030] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] As Figure 1-6 shown, a shaft tubular pump with a blade adjusting device includes a pump body 170, a motor 1, a pump shaft 8, an impeller housing 10, a plurality of blades 1101, a transmission shaft 1107, an adjusting device 5, and a spring 1109; the pump body 17 has an inlet water passage 15 and an outlet water passage 16; a mounting block 18 is arranged in the inlet water passage 15; a mounting cavity is provided on the mounting block 18, and the motor 1 is arranged in the mounting cavity; the impeller housing 10 is connected to the output shaft of the motor 1; the blades 1101 are connected to the impeller housing 10; when the transmission shaft 1107 moves, it drives the blades 1101 to rotate around the central axis to adjust the angle of the blades 1101; the adjusting device 5 is used to drive the transmission shaft 1107 to move; the spring 1109 cooperates with the adjusting device 5 to push the transmission shaft 1107 to move, and the spring 1109 is a spring 1109 with a high elastic coefficient; when the blades 1101 are adjusted forward, the adjusting device 5 drives the transmission shaft 1107 to move towards the motor 1, and the spring 1109 is compressed; when adjusting the angle of the blades 1101, when the adjusting device 5 drives the transmission shaft 1107 to move away from the motor 1, the spring 1109 pushes the other end of the transmission shaft 1107 to move away from the motor 1.

[0032] One end of the pump shaft 8 is connected to a hub body 1102. A end cover 14 is covered on the hub body 1102. A water guide cone 13 is also connected to the hub body 1102. The end cover 14 is located inside the water guide cone 13. A piston shaft 1116 is arranged inside the hub body 1102. One end of a transmission shaft 1107 is connected to a first rotating sleeve 1110. The piston shaft 1116 is connected to the transmission shaft 1107 through the first rotating sleeve 1110. A first stop block 1111 is arranged on the piston rod. The first stop block 1111 cooperates with the first rotating sleeve 1110 to prevent the first rotating sleeve 1110 from rotating when the blade 1101 is working. An operating frame 1115 is arranged at one end of the piston shaft 1116. A guiding block 1118 is arranged inside the hub body 1102. The guiding block 1118 is used to guide the movement of the operating frame 1115 inside the hub body 1102, making the movement of the operating frame 1115 more stable. A fork head 1114 is connected to the operating frame 1115. A crank arm 1105 is arranged on the blade 1101. The blade 1101 is connected to the crank arm 1105 through a blade pin 1106. A connecting plate 1113 is arranged on the crank arm 1105. One end of the connecting plate 1113 is rotatably connected to the crank arm 1105, and the other end is rotatably connected to the fork head 1114. An upper shaft sleeve 1112 and a lower shaft sleeve 1117 are sleeved on the piston shaft 1116. The piston rod is connected inside the hub body 1102 through the upper shaft sleeve 1112 and the lower shaft sleeve 1117 to ensure the stability of the movement of the piston rod. An inner shaft sleeve 1119 and an outer shaft sleeve 1104 are arranged on the blade 1101. The blade 1101 is connected to the hub body 1102 through the inner shaft sleeve 1119 and the outer shaft sleeve 1104. When the piston rod drives the fork head 1114 to move along the axial direction of the hub body 1102, the connecting plate 1113 drives the crank arm 1105 to move, causing the blade 1101 to rotate around the inner shaft sleeve 1119, realizing the adjustment of the angle of the blade 1101. A sealing layer 1103 is also arranged on the outer shaft sleeve 1104 to ensure the sealing effect inside the hub body 1102.

[0033] A spring 1109 seat 1108 is sleeved on the transmission shaft 1107. The spring 1109 seat 1108 is fixedly connected to the inner wall of the pump shaft 8. The spring 1109 is located between the spring 1109 seat 1108 and the first rotating sleeve 1110. One end of the spring 1109 abuts against the spring 1109 seat 1108, and the other end abuts against the first rotating sleeve 1110.

[0034] A gear box 2 is also arranged in the installation cavity. The motor 1 is connected to the gear box 2 through a high-speed end coupling 3. The pump shaft 8 is connected to the gear box 2 through a low-speed end connecting shaft. A cavity is arranged on the low-speed end connecting shaft. An adjusting device 5 is arranged in the cavity. The low-speed end coupling 4 includes a first section and a second section. The first section and the second section are connected together through a split connecting flange 509.

[0035] The adjusting device 5 includes a servomotor 503, the piston rod of the servomotor 503, an oil pump interface 510, a two-way hydraulic lock 504, a manual locking device 508, and a displacement sensor 506. The servomotor 503 is connected to the cavity through a flange seat of the servomotor 503. The manual locking device 508 is located at the piston rod of the servomotor 503, and the two-way hydraulic lock 504 is located at the oil pump interface 510. The piston rod of the servomotor 503 is connected to the transmission shaft 1107 through a second swivel 501 and a second anti-rotation block. The setting of the second anti-rotation block further improves the connection effect between the piston rod of the servomotor 503 and the transmission shaft 1107. The detection head of the displacement sensor 506 is connected to the piston rod of the servomotor 503 to accurately control the moving amount of the piston rod of the servomotor 503, so as to accurately adjust the angle of the blade 1101.

[0036] The motor 1 transmits power to the pump shaft 8 through the gearbox 2 to drive the water pump to rotate to achieve the purpose of pumping water. The adjusting device 5, the spring 1109, and the transmission shaft 1107 jointly push the operation bracket to adjust the angle of the blade 1101. Figure 1 Taking the direction in

[0037] as an example, during forward adjustment, the piston rod of the servomotor 503 of the adjusting device 5 moves axially to the left (at this time, the rod of the servomotor 503 is in tension and the spring 1109 is compressed), adjusts the angle of the blade 1101 to a suitable position, and starts the motor 1 to pump water. If it is necessary to adjust the angle of the blade 1101, only need to connect the two oil pump interfaces 510 on the adjusting device 5, and through a manual oil injection pump, move the rod of the servomotor 503 of the adjusting device 5 axially to the right (at this time, the rod of the servomotor 503 is under pressure and the spring 1109 changes from the compressed state to the rebounding state). The piston rod of the servomotor 503 moves to the right under the combined action of the thrust of the servomotor 503 and the pulling force of the spring 1109 to reversely adjust the angle of the blade 1101, solving the industry problem of the instability of the long-axis system compression bar, providing thrust to the transmission shaft 1107 from both ends, and avoiding the problem that the transmission shaft 1107 will bend and deform when receiving thrust. After the oil adjustment is completed, first lock the manual locking device 508, and then lock the two-way hydraulic lock 504.

[0038] A thrust bearing 601 and a radial bearing 602 are provided on the pump shaft 8, and an adjusting shim 603 is also provided on the other side of the pump shaft 8, making the movement of the pump shaft 8 more stable.

[0039] There are three main differences between the servomotor 503 of this application and the traditional servomotor 503: First, the new type of servomotor 503 uses manual hydraulic operation after shutdown, with a simpler oil circuit layout and a greatly simplified structure. Second, a hydraulic lock switch is added to the servomotor 503, which can avoid the phenomenon of angle swing after the blade is adjusted. Third, the new type of servomotor 503 is driven by a manual hydraulic pump. When the blade angle needs to be adjusted, it is operated after connecting during shutdown and disconnected from the hydraulic pump after adjustment. The operation is simple, and the manual hydraulic pump is inexpensive. Compared with hydraulic regulating mechanisms that cost hundreds of thousands of yuan, it greatly reduces the cost of auxiliary equipment while improving the operation convenience, which is beneficial to reducing the project investment.

[0040] Operation example: When the blade angle needs to be adjusted, the operator injects hydraulic oil into the oil pump interface through the manual hydraulic pump, driving the servomotor piston rod to move 10 mm. The spring resilience is 500 N, and the linkage drive shaft moves in the opposite direction to achieve precise angle adjustment.

[0041] For the traditional fixed-blade vertical shaft tubular pump with manual operation, a large amount of time is required for disassembling and assembling the pump casing, impeller, and blade, as well as pumping water with the lower gate. However, in this application, the blade angle can be adjusted without disassembling the pump casing, saving the time occupied by a large number of disassembly and assembly links. Compared with the traditional manual-operated vertical shaft tubular pump, it can greatly shorten the component replacement time, with more convenient operation and easier use.

[0042] The above description is only some preferred embodiments of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A shaft throughflow pump with a blade adjustment device, characterized in that: include: A pump body having a water inlet flow channel and a water outlet flow channel; A motor is arranged on the water inlet channel in the pump body; The pump shaft is driven to rotate by the motor; A plurality of blades connected to the pump shaft; A transmission shaft is located inside the pump shaft and is capable of moving axially along the pump shaft. When the transmission shaft moves axially, it drives the blades to rotate around the central axis of the blades to adjust the blade angles; The axis of the blade is perpendicular to the center axis of the pump shaft; An adjustment device, used for driving the transmission shaft to move axially relative to the pump shaft; A spring, cooperating with the adjusting device to push the transmission shaft to move; When the blade is adjusted in the positive direction, the adjusting device drives the transmission shaft to move toward the motor, and the spring is squeezed; When the blade adjusts its angle in the reverse direction, the adjusting device drives the transmission shaft to move in a direction away from the motor, and the spring pushes the other end of the transmission shaft to move in a direction away from the motor.

2. The shaft throughflow pump with a blade adjustment device according to claim 1, characterized in that: Also includes: A piston shaft connected to the transmission shaft; An operating frame connected to one end of the piston shaft; A fork head connected to the operating frame; A connecting plate, one end of which is rotatably connected to the fork head, and the other end of which is rotatably connected to the blade; A crank arm is provided on the blade, and one end of the connecting plate is connected to the crank arm.

3. The shaft throughflow pump with a blade adjustment device according to claim 2, characterized in that: Also includes: A spring seat, sleeved on the operating shaft; A first rotary sleeve connected to one end of the operating shaft; The operating shaft and the piston shaft are connected together through the first rotary sleeve. The spring is located between the spring seat and the first rotary sleeve. One end of the spring abuts against the spring seat, and the other end abuts against the first rotary sleeve.

4. The shaft throughflow pump with a blade adjustment device according to claim 1, characterized in that: Also includes: A gear box connected to the output shaft of the motor; A high-speed end coupling is provided on one side of the gear box; A low-speed end coupling is arranged on the other side of the gear box; A pump shaft connected to the low-speed end coupling; The low-speed connecting shaft is provided with a cavity, and the adjusting device is installed in the cavity.

5. The shaft throughflow pump with a blade adjustment device according to claim 4, characterized in that: The adjusting device comprises: a servomotor disposed in the cavity; A servomotor piston rod connected to one end of the servomotor; An oil pump interface, provided on the servomotor; A two-way hydraulic lock is arranged in the oil pump interface; The servomotor piston rod is connected to the transmission shaft.

6. The shaft throughflow pump with a blade adjustment device according to claim 5, characterized in that: The servomotor is provided with a displacement sensor, and a detection head of the displacement sensor is connected to the servomotor piston rod.

7. The shaft throughflow pump with a blade adjustment device according to claim 6, characterized in that: A thrust bearing and a radial bearing are arranged on the pump shaft, and an adjusting washer is arranged on the other side of the pump shaft.

Images