CN215672727U

CN215672727U - Two-way axial-flow pump of adjustable two stator in area

Info

Publication number: CN215672727U
Application number: CN202121071370.6U
Authority: CN
Inventors: 李世佳; 杨帆; 周王雅妮; 李明宇; 张文杰
Original assignee: Yangzhou University
Current assignee: Yangzhou University
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-01-28
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses a bidirectional axial flow pump with adjustable double guide vanes, which comprises a pipeline, a main impeller positioned in the pipeline, a front guide vane mounting part and a rear guide vane mounting part; the front guide vane mounting part is provided with a plurality of front guide vanes; the rear guide vane mounting part is provided with a plurality of rear guide vanes. The front guide vane and the rear guide vane can better play respective roles when the front guide vane and the rear guide vane operate in the forward and reverse directions and the water head changes by adjusting the mounting angles of the front guide vane and the rear guide vane, the guide vanes operate at a high efficiency point for a long time under different incoming flow conditions, and the hydraulic performance of the bidirectional pump is improved.

Description

Two-way axial-flow pump of adjustable two stator in area

Technical Field

The utility model relates to a water pump technology, in particular to a bidirectional axial flow pump.

Background

The terrain in the areas along the river and lake is gentle, the lift is low, and most pump stations are axial flow pumps. Along with the development needs of economy and life, most of the pump stations have the function of pumping water and drainage, and considering that part of pump station civil engineering is basically finished, the pump stations are difficult to be directly structurally transformed, and in order to reduce the engineering cost, the direct reversing motor is adopted to realize the function of bidirectional pumping water.

As a bidirectional axial flow pump, the operating condition of the actual pump station engineering has large amplitude, the water pump cannot operate for a long time at the optimal performance point due to the change of a water head and the change of the flow direction, and the traditional water pump designed under a single working condition is difficult to adapt to the application requirement of large amplitude of the working condition. In the process of forward operation, the guide vanes can eliminate or weaken the circulation, improve the flow state of water flow, reduce water pressure pulsation and stabilize the operation of the water pump. In a reverse working condition, the guide vane can play a certain rectifying role, but the rear guide vane is not used for recovering energy, so that certain energy loss is caused.

The water flow regulation of water inflow and water outflow of the bidirectional pump has certain difference, the traditional axial flow pump adopts the fixed guide vane, the front guide vane and the rear guide vane carry out corresponding angle regulation under different working conditions, the energy loss is large, the energy consumption is high, when the working condition is reversed, the guide vane can not carry out corresponding regulation according to the flow direction, the impeller and the guide vane have serious shedding, and the performance is greatly reduced.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: aiming at the defects, the utility model provides a bidirectional axial flow pump with adjustable double guide vanes, which is used for solving the technical problem that the guide vanes of the bidirectional axial flow pump cannot be adjusted when the bidirectional axial flow pump works in the reverse direction.

The technical scheme is as follows: in order to solve the above problems, the present invention may adopt the following technical solutions:

a bidirectional axial flow pump with adjustable double guide vanes comprises a pipeline and a main impeller positioned in the pipeline, and is characterized in that a front guide vane mounting part is arranged at the front end of the main impeller; the rear end of the main impeller is coaxially connected with a rear guide vane mounting part; the front guide vane mounting part is provided with a plurality of front guide vanes arranged along the axial direction, the centers of the front guide vanes penetrate through a first adjusting shaft, one end of the first adjusting shaft is positioned in the front guide vane mounting part, the other end of the first adjusting shaft penetrates through the pipeline, and the first adjusting shaft adjusts the angle of the mounting angle of the front guide vanes; the rear guide vane mounting part is provided with a plurality of rear guide vanes arranged along the axial direction, the center of each rear guide vane passes through the second adjusting shaft, one end of each second adjusting shaft is located in the rear guide vane mounting part, the other end of each second adjusting shaft penetrates out of the pipeline, and the second adjusting shaft adjusts the angle of the rear guide vane placement angle.

Has the advantages that: compared with the prior art, the front guide vane and the rear guide vane are provided with the adjusting shafts, so that the water pump can control and adjust the mounting angles of the front guide vane and the rear guide vane under different incoming flow conditions, the front guide vane and the rear guide vane can better play respective roles when the forward and reverse operation and the water head change occur, the guide vanes can operate at a high efficiency point for a long time under different incoming flow conditions to the greatest extent, and the hydraulic performance of the bidirectional pump is improved.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention.

FIG. 2 is a schematic structural diagram of an impeller, a front guide vane and a rear guide vane part in the utility model.

FIG. 3 is a schematic cross-sectional view of a duct at a leading vane.

FIG. 4 is a cross-sectional schematic view of a leading vane.

FIG. 5 is a schematic view of the adjustment of the setting angle of the guide vanes in the present invention.

Fig. 6 is a schematic view of the overall structure of the second embodiment of the present invention.

Detailed Description

Example one

Referring to fig. 1 to 5, the present embodiment provides a bidirectional axial flow pump with adjustable double guide vanes, which includes a pipeline, a main impeller 5 located in the pipeline, and a motor 2. The pipeline comprises a water inlet flow passage 3 and a water outlet flow passage 4, wherein a first annular quantity tester 8 is arranged at the water inlet flow passage 3, a second annular quantity tester 9 is arranged at the water outlet flow passage 4, and a computer terminal 10 connected with the first annular quantity tester 8 and the second annular quantity tester 9 is arranged at the same time. In the present embodiment, the water inlet channel 3 and the water outlet channel 4 are symmetrical. The main impeller 5 is an S-shaped impeller.

The front end of the main impeller 5 is provided with a front guide vane mounting part; the rear end of the main impeller is coaxially connected with a rear guide vane mounting part. The leading stator installation department is equipped with along a plurality of leading stator 6 of axial setting. The rear guide vane mounting part is provided with a plurality of rear guide vanes 7 arranged along the axial direction. The front guide vane 6 and the rear guide vane 7 are low-camber arc bone line straight guide vanes, and the low-camber arc bone line straight guide vanes are bilaterally symmetrically thickened. In the present embodiment, the setting angles of the front guide vanes 6 and the rear guide vanes 7 are adjusted by the adjusting shafts 12.

As shown in fig. 3 and 4, the adjusting shaft 12 passes through the center of the guide vane and is fixed on the front guide vane 6 through the nut 11-1 and the nut 11-2, the adjusting shaft 12 is connected with the external rotating handle 13 of the water pump, and after receiving the adjusting data of the computer end 10, the operator adjusts the setting angle of the guide vane through the rotating handle 13.

In other embodiments, the adjustment shaft 12 may be connected to the motor to adjust the angle and drive the front guide vane and the rear guide vane to rotate, instead of manual adjustment. The adjustment of the setting angle of the guide vane can also be realized, and is not described in detail herein.

The setting angles of the front guide vane 6 and the rear guide vane 7 are adjusted between +10 degrees and-10 degrees. And starting the motor 2 to drive the output shaft 1 to rotate. The front guide vane mounting part and the rear guide vane mounting part are fixed in the pipeline and do not rotate. An output shaft 1 of the motor 2 is coaxially connected and fixed with a main impeller 5, and the output shaft 1 rotates to drive the main impeller 5 to rotate. When the water pump runs in the forward direction, water flows in from the water inlet flow channel 3 and flows out from the water outlet flow channel 4; in reverse operation, water flows from the outlet flow passage 4 and from the inlet flow passage 3. The motor 2 is positioned outside the pipeline, and the output shaft 1 penetrates into the pipeline and is coaxially connected with the main impeller 5.

The front-mounted circulation tester 8 arranged at the water inlet flow passage 3 and the rear-mounted circulation tester 9 arranged at the water outlet flow passage 4 detect the flow conditions in real time, when the front-mounted circulation tester 8 and the rear-mounted circulation tester 9 test that the current flow condition change amplitude reaches a certain degree, circulation data are fed back to the computer end 10, and the computer end displays the adjusting data through a display. The operator adjusts the setting angle of the guide vane by rotating the handle 13 according to the adjustment data. The hydraulic performance of the bidirectional axial-flow pump is improved by respectively adjusting the mounting angles of the front guide vane 6 and the rear guide vane 7. Especially when the pump is in a reverse working condition, the front guide vane 6 and the rear guide vane 7 can adjust corresponding setting angles according to the flow direction, and the working performance of the pump is improved.

Example two

As shown in fig. 4, the present embodiment is also a bidirectional axial flow pump with adjustable double guide vanes, and the present embodiment also includes a motor 2, an output shaft 1 of the motor, a water inlet flow channel 3, a water outlet flow channel 4, a main impeller 5, a front guide vane 6, and a rear guide vane 7. The water inlet channel 3 is provided with a first annular quantity tester 8, the water outlet channel 4 is provided with a second annular quantity tester 9, and a computer terminal 10 for connecting the first annular quantity tester 8 and the second annular quantity tester 9 is arranged at the same time. The structure is the same as that of the first embodiment except for the water inlet flow passage 3 and the water outlet flow passage 4. The difference is that the water inlet flow passage 3 and the water outlet flow passage 4 are in an asymmetric shape; the water inlet flow channel and the water outlet flow channel are both in a horn mouth shape.

In the second embodiment, the setting angles of the front guide vanes 6 and the rear guide vanes 7 are respectively adjusted through the adjusting shafts 12, so that the hydraulic performance of the bidirectional axial flow pump is improved.

Claims

1. A bidirectional axial flow pump with adjustable double guide vanes comprises a pipeline and a main impeller (5) positioned in the pipeline, and is characterized in that a front guide vane mounting part is arranged at the front end of the main impeller (5); the rear end of the main impeller is coaxially connected with a rear guide vane mounting part; the front guide vane mounting part is provided with a plurality of front guide vanes (6) arranged along the axial direction, the centers of the front guide vanes penetrate through a first adjusting shaft, one end of the first adjusting shaft is positioned in the front guide vane mounting part, the other end of the first adjusting shaft penetrates through a pipeline, and the first adjusting shaft adjusts the angle of the mounting angle of the front guide vanes (6); the rear guide vane mounting part is provided with a plurality of rear guide vanes (7) arranged along the axial direction, the center of each rear guide vane passes through a second adjusting shaft, one end of each second adjusting shaft is located in the rear guide vane mounting part, the other end of each second adjusting shaft penetrates out of the pipeline, and the second adjusting shaft adjusts the angle of the placement angle of each rear guide vane (7).

2. The bidirectional axial flow pump with the adjustable double guide vanes according to claim 1, wherein the pipeline comprises a water inlet flow passage (3) and a water outlet flow passage (4), a first annular quantity tester (8) is installed at the water inlet flow passage (3), a second annular quantity tester (9) is installed at the water outlet flow passage (4), and a computer terminal (10) for connecting the first annular quantity tester (8) and the second annular quantity tester (9) is arranged.

3. The bidirectional axial flow pump with adjustable double vanes according to claim 2, wherein a handle is connected to each of the first and second adjusting shafts at one end through the duct.

4. The bidirectional axial flow pump with the adjustable double guide vanes according to claim 3, wherein the water inlet flow passage (3) and the water outlet flow passage (4) are in a symmetrical shape.

5. The bidirectional axial flow pump with adjustable double vanes according to claim 3, wherein said water inlet channel and said water outlet channel are asymmetric; the water inlet flow channel and the water outlet flow channel are both in a horn mouth shape.

6. The bidirectional axial flow pump with the adjustable double guide vanes according to any one of claims 1 to 5, characterized in that the front guide vane (6) and the rear guide vane (7) both adopt low camber arc bone straight guide vanes, and the low camber arc bone straight guide vanes are bilaterally symmetrically thickened.

7. The bidirectional axial flow pump with adjustable double vanes according to claim 6, characterized in that the main impeller (5) is an S-shaped impeller.

8. The bidirectional axial flow pump with the adjustable double guide vanes according to claim 1, further comprising a motor (2) for driving the main impeller to rotate, wherein an output shaft (1) of the motor (2) is coaxially connected and fixed with the main impeller.

9. The bidirectional axial flow pump with adjustable double guide vanes according to claim 8, characterized in that the motor (2) is located outside the duct, and the output shaft (1) penetrates inside the duct and is coaxially connected with the main impeller.

10. The bidirectional axial flow pump with the adjustable double guide vanes according to claim 1 or 2, wherein the first adjusting shaft and the second adjusting shaft are respectively connected with a motor to adjust the angle and drive the front guide vane and the rear guide vane to rotate.