WO2022121282A1

WO2022121282A1 - Flow distribution-type blade cam combination pump

Info

Publication number: WO2022121282A1
Application number: PCT/CN2021/102097
Authority: WO
Inventors: 吴孟丽
Original assignee: 中国民航大学
Priority date: 2020-12-07
Filing date: 2021-06-24
Publication date: 2022-06-16
Also published as: CN112483348A; CN112483348B

Abstract

A flow distribution-type blade cam combination pump, comprising a box body (1), bearings (2), a bearing end cover (3), a bearing through cover (4), a rotating main shaft (5), a cam (6), rotating blades (7), and a rotating blade upper through cover (8), a liquid inlet pipeline (9), a liquid supply pipeline (10), a liquid discharge pipeline (11), a hydraulic cylinder (12), a piston (13), a piston rod (14), a piston rod shaft end pulley (15), a motor (16) and a coupling (17); and the rotating blades (7) pressurize, by rotating, a liquid fed into the hydraulic cylinder (12).

Description

Flow distribution vane cam compound pump

technical field

The invention belongs to the technical field of deicing equipment for civil aviation, and particularly relates to a flow distribution type vane cam compound pump.

Background technique

When a civil aircraft stays on the ground in a cold environment, the surface of the aircraft is easy to freeze; in the extremely low temperature clouds at high altitudes, there is a negative degree of supercooled water. Can cause droplet icing. In addition to droplet icing, the icing methods that occur on aircraft include dry icing and desublimation icing. Droplet icing will greatly affect the performance of the aircraft and threaten the flight safety, and even cause catastrophic accidents, so the aircraft needs to have little or no icing at any time of flight.

The physical properties of civil aviation de-icing fluid will change under different temperatures and pressures. Currently, the anti-icing and de-icing fluid supply pumps used in civil aircraft mostly use a crank-connecting rod structure. In the process of supplying high-viscosity de-icing fluid Because of the many transmission links, there are problems of low precision and low efficiency, and the pump pulsation during the liquid supply process may cause vibration of the internal structure of the aircraft, thereby causing structural damage to the aircraft, reducing life and reducing safety. .

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to provide a flow distribution type vane cam compound pump.

In order to achieve the above purpose, the flow distribution type vane cam compound pump provided by the present invention includes a box body, a bearing, a bearing end cover, a bearing transparent cover, a rotating main shaft, a cam, a rotating blade, a rotating blade upper transparent cover, a liquid inlet pipe, and a liquid supply. Pipes, drainage pipes, hydraulic cylinders, pistons, piston rods, piston rod shaft end pulleys, motors and couplings; wherein, the box body is composed of a box body base, a box body top plate directly above the box body base, and multiple It is composed of a hydraulic cylinder support plate connected between the box base and the box top plate. The sides of the adjacent hydraulic cylinder support plates are connected in sequence to form a regular prismatic space; a groove is formed in the middle of the top surface of the box base. , the bearing end cover is installed in the groove, and a bearing is arranged in the center of the bearing end cover; a cylindrical cavity is formed inside the top plate of the box, and an upper port that communicates with the cylindrical cavity is formed in the middle of the top surface; The upper transparent cover of the blade is installed at the upper port of the top plate of the box body, the bearing transparent cover is arranged in the center, and another bearing is arranged at the center of the bearing transparent cover; the lower end of the rotating main shaft is located in the bearing center hole on the bearing end cover, and the middle part penetrates the right prism The body shape space and the bottom surface of the box top plate are fixed in the bearing center hole on the bearing transparent cover. In the cylindrical cavity of the top plate of the box, and the inner end is connected to the rotating main shaft at the same time; the central hole of the cam is installed in the middle of the rotating main shaft in the space of the right prism through the flat key; the middle part of the outer end face of each hydraulic cylinder support plate is respectively Install a hydraulic cylinder; a piston is arranged in the cylindrical inner cavity of each hydraulic cylinder; one end of the piston rod is connected to the piston, and the other end penetrates the inner end face of the hydraulic cylinder and is closely attached to the cam through a piston rod shaft end pulley. On the outer curved surface; the lower end of each liquid supply pipeline is connected to the top surface of a hydraulic cylinder, and the upper end is connected to the side surface of the box top plate above the hydraulic cylinder, and is connected with the cylindrical cavity of the box top plate and the hydraulic cylinder. The cylindrical inner cavity is connected; one end of each liquid discharge pipeline is connected to the lower part of the outer end face of a hydraulic cylinder, and is communicated with the cylindrical inner cavity of the hydraulic cylinder; at the edge of the top surface and communicated with the cylindrical cavity of the top plate of the box.

The plurality of hydraulic cylinders are equally spaced.

The lower port of the liquid inlet pipe is flush with the upper end face of the rotating blade, and the diameter is 1/3 of the height of the rotating blade.

The box body base and the box body top plate are both regular pentagonal metal plates. The liquid inlet pipeline, liquid supply pipeline and liquid discharge pipeline are all metal pipelines.

The curved surface of the rotating blade is formed by fitting a plurality of curves.

The flow distribution vane cam compound pump provided by the present invention has the following advantages:

1. The rotating blade pressurizes the liquid supplied into the hydraulic cylinder through rotation, so that the rigid impact and vibration of the piston rod of the pump are significantly reduced compared to the piston rod of the ordinary pump, and the flow pulsation rate is significantly reduced;

2. The rotating blade can perform real-time flow and workload distribution according to the actual pressure of multiple hydraulic cylinders at the bottom, so that the movements of multiple hydraulic cylinders are coordinated;

3. The structure of the pump body is concentrated and compact. The layout of the regular prism shape is supplemented by the optimally designed cam profile, which can output the liquid smoothly, thus ensuring that the properties of the liquid are not damaged to the greatest extent;

4. The pump can directly adjust its flow characteristics by adjusting the rotational speed of the rotating main shaft or changing the number of vanes in the vane pump, so as to meet different liquid supply flow requirements according to the actual situation.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the flow distribution vane cam compound pump provided by the present invention.

FIG. 2 is a schematic diagram of the rotating vanes in the flow distribution vane cam compound pump provided by the present invention.

3 is a schematic diagram of a cam and five pistons in the flow distribution vane cam compound pump provided by the present invention.

Detailed ways

The flow distribution type vane cam compound pump provided by the present invention will be described below with reference to the accompanying drawings and specific embodiments.

As shown in Fig. 1 - Fig. 3, the flow distribution type vane cam compound pump provided by the present invention comprises a box body 1, a bearing 2, a bearing end cover 3, a bearing transparent cover 4, a rotating main shaft 5, a cam 6, a rotating blade 7, a rotating Blade upper transparent cover 8, liquid inlet pipe 9, liquid supply pipe 10, liquid discharge pipe 11, hydraulic cylinder 12, piston 13, piston rod 14, piston rod shaft end pulley 15, motor 16 and coupling 17; The box described above is composed of a box base 101, a box top plate 103 located directly above the box base 101, and a plurality of hydraulic cylinder support plates 102 connected between the box base 101 and the box top plate 103. Adjacent hydraulic cylinders The sides of the support plate 102 are connected in sequence to form a regular prismatic space; a groove is formed in the middle of the top surface of the box base 101, the bearing end cover 3 is installed in the groove, and a bearing 2 is arranged in the center of the bearing end cover 3 ; A cylindrical cavity is formed inside the box top plate 103, and an upper port that communicates with the cylindrical cavity is formed in the middle of the top surface; The bearing transparent cover 4 is arranged at the center of the bearing transparent cover 4, and another bearing 2 is arranged at the center of the bearing transparent cover 4; the lower end of the rotating main shaft 5 is located in the center hole of the bearing 2 on the bearing end cover 3, and the middle part penetrates the right prism-shaped space and the bottom surface of the box top plate 103 In the center hole of the bearing 2 fixed on the bearing transparent cover 4, the upper end is located above the top plate 103 of the box body and is connected with the output shaft of the motor 16 through the coupling 17; a plurality of rotating blades 7 are radially evenly arranged on the box body The cylindrical cavity of the top plate 103 is in the cylindrical cavity, and the inner end is connected to the rotating main shaft 5 at the same time; A hydraulic cylinder 12 is respectively installed in the middle of the end face; a piston 13 is arranged in the cylindrical inner cavity of each hydraulic cylinder 12; The rod shaft end pulley 15 is closely attached to the outer curved surface of the cam 6; , and communicate with the cylindrical cavity of the box top plate 103 and the cylindrical inner cavity of the hydraulic cylinder 12; One end of the plurality of liquid inlet pipes 9 is connected to the edge of the top surface of the box top plate 103 at intervals, and communicates with the cylindrical cavity of the box top plate 103 .

The plurality of hydraulic cylinders 12 are equally spaced.

The lower port of the liquid inlet pipe 9 is flush with the upper end surface of the rotating blade 7 , and the diameter is 1/3 of the height of the rotating blade 7 .

The box body base 101 and the box body top plate 103 are both regular pentagonal metal plates. The liquid inlet pipe 9, the liquid supply pipe 10 and the liquid discharge pipe 11 are all metal pipes.

The curved surface of the rotating blade 7 is formed by fitting a plurality of curves.

The working principle of the flow distribution vane cam compound pump provided by the present invention is described as follows: the pump adopts an up-down arrangement structure, firstly, the upper layer of the rotary vane 7 is used to rotate and pressurize the liquid supply, and then the lower layer of the piston 13 is used in the hydraulic cylinder 12. The reciprocating motion further pressurizes and discharges the fluid.

When the civil aviation deicing liquid needs to be pumped, the liquid supply pipeline is connected to the outer end of the liquid inlet pipeline 9 of the pump, and the motor 16 is turned on, thereby driving the rotating main shaft 5 and the rotating blade 7 to rotate together. The deicing liquid will enter the cylindrical cavity of the box top plate 103 where the rotating blade 7 is located through the liquid inlet pipe 9. Driven by the motor 16, the deicing liquid will rotate with the rotating blade 7. A high pressure area will be formed on the side wall of the cylindrical cavity where the rotating blade 7 is located, and then provided to the hydraulic cylinder 12 on the lower side through the liquid supply pipeline 10; the cam 6 will drive the piston rod 14 driven by the rotating main shaft 5 Make the piston 13 reciprocate in the hydraulic cylinder 12, and multiple hydraulic cylinders 12 have different liquid suction and discharge states at the same time; when the piston 13 in the hydraulic cylinder 12 generates negative pressure during the return stroke, the deicing fluid is sucked in In the hydraulic cylinder 12 ; when the piston 13 generates positive pressure during the pushing process, the deicing liquid in the hydraulic cylinder 14 is pumped out through the liquid discharge pipeline 11 . Since the liquid suction and discharge are carried out in the plurality of hydraulic cylinders 12 at the same time, the rotating blade 7 can realize the automatic adjustment of the flow rate according to the pressure change, and the distributed deicing liquid is more stable and has a certain pressure, and finally realizes stable, The purpose of large flow continuous liquid supply.

Claims

A flow distribution type vane cam compound pump is characterized in that: the flow distribution type vane cam compound pump comprises a box body (1), a bearing (2), a bearing end cover (3), a bearing transparent cover (4), The rotating main shaft (5), the cam (6), the rotating blade (7), the upper transparent cover of the rotating blade (8), the liquid inlet pipe (9), the liquid supply pipe (10), the liquid discharge pipe (11), the hydraulic cylinder ( 12), piston (13), piston rod (14), piston rod shaft end pulley (15), motor (16) and coupling (17); wherein, the box is composed of box base (101), The box body top plate (103) located directly above the box body base (101) and a plurality of hydraulic cylinder support plates (102) connected between the box body base (101) and the box body top plate (103) are formed. The sides of the support plate (102) are connected in sequence to form a regular prismatic space; a groove is formed in the middle of the top surface of the box base (101), and the bearing end cover (3) and the bearing end cover (3) are installed in the groove. A bearing (2) is arranged at the center of the ); a cylindrical cavity is formed inside the box top plate (103), and an upper port is formed in the middle of the top surface that communicates with the cylindrical cavity; the upper transparent cover of the rotating blade ( 8) Installed at the upper port of the top plate (103) of the box body, the bearing transparent cover (4) is arranged at the center, and another bearing (2) is arranged at the center of the bearing transparent cover (4); the lower end of the rotating main shaft (5) is located in the bearing In the center hole of the bearing (2) on the end cover (3), the middle part penetrates the right prismatic space and the bottom surface of the box top plate (103) and is fixed in the center hole of the bearing (2) on the bearing transparent cover (4), and the upper end is located above the box top plate (103) and is connected to the output shaft of the motor (16) through a coupling (17); a plurality of rotating blades (7) are radially and uniformly arranged in the cylindrical cavity of the box top plate (103) inside the body, and the inner end is connected to the rotating main shaft (5) at the same time; the central hole of the cam (6) is installed in the middle of the rotating main shaft (5) in the space of the right prism through a flat key; each hydraulic cylinder support plate (102) A hydraulic cylinder (12) is respectively installed in the middle of the outer end face of the hydraulic cylinder (12); a piston (13) is arranged in the cylindrical inner cavity of each hydraulic cylinder (12); one end of the piston rod (14) is connected to the piston (13), and the other One end penetrates the inner end face of the hydraulic cylinder (12) and then is closely attached to the outer curved surface of the cam (6) through a piston rod shaft end pulley (15); the lower end of each liquid supply pipe (10) is connected to a hydraulic cylinder (12) ), the upper end is connected to the side surface of the box top plate (103) above the hydraulic cylinder (12), and is connected with the cylindrical cavity of the box top plate (103) and the cylindrical inner surface of the hydraulic cylinder (12). one end of each discharge pipe (11) is connected to the lower part of the outer end face of a hydraulic cylinder (12) and communicated with the cylindrical inner cavity of the hydraulic cylinder (12); a plurality of liquid inlet pipes (9) One end is connected to the edge of the top surface of the box top plate (103) at intervals, and communicated with the cylindrical cavity of the box top plate (103).
The flow distribution type vane cam compound pump according to claim 1, characterized in that: the plurality of hydraulic cylinders (12) are distributed at equal intervals.
The flow distribution vane cam compound pump according to claim 1, characterized in that: the lower port of the liquid inlet pipe (9) is flush with the upper end surface of the rotating blade (7), and the diameter is the same as that of the rotating blade (7) 1/3 of the height.
The flow distribution type vane-cam compound pump according to claim 1, characterized in that: the box body base (101) and the box body top plate (103) are both regular pentagonal metal plates.
The flow distribution vane cam compound pump according to claim 1, characterized in that: the liquid inlet pipe (9), the liquid supply pipe (10) and the liquid discharge pipe (11) are all metal pipes.
The flow distribution vane-cam compound pump according to claim 1, characterized in that: the curved surface of the rotating vane (7) is formed by fitting a plurality of curves.