JP3285386B2 - Positive displacement pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention provides a new principle of a positive displacement pump.

[0002]

2. Description of the Related Art There are two basic principles of pumps: positive displacement pumps and non-positive displacement pumps. Positive displacement pumps perform a pumping action by directly moving the volume.
A non-positive displacement pump gives kinetic energy to a fluid and moves the fluid by the kinetic energy to perform a pump motion. The present invention relates to a positive displacement pump. The conventional positive displacement pump, for example, has a drawback that a reciprocating pump has large vibration due to large movement of the center of gravity due to reciprocating motion and is not energy efficient. In order to solve this, a rotary pump or a centrifugal pump with less movement of the center of gravity and high energy efficiency was invented.However, since these are not rotational movements centered on the center of gravity, there is a disadvantage that not a little vibration occurs, Further, there is a disadvantage that pulsation of pressure and flow rate occurs. On the contrary,
Non-displacement pumps such as axial-flow pumps and turbo-type pumps have the advantage that the center of gravity does not move, pressure and flow rate pulsations do not occur, and volumetric efficiency is excellent, but the inlet and outlet are directly connected. Therefore, there is a drawback that the pump output greatly fluctuates with respect to the afterload, and the shaft cannot be completely sealed due to the presence of the rotating shaft.

[0003]

As will be apparent from the preceding paragraph, the pump does not move the center of gravity, has a volumetric efficiency comparable to that of an axial flow type pump, has excellent energy efficiency, and has a pump output with respect to an afterload. The principle of positive displacement pumps that has little fluctuation of pressure, no pulsation of pressure and flow rate, and realizes complete sealing of the shaft at the same time does not exist.Each manufacturer uses the conventional pump principle and adds additional elements. In order to solve these shortcomings, enormous research and prototyping costs have been spent on commercialization. The present invention has been made to solve such a problem in principle.

[0004]

As a means for solving the problems, a new principle of a positive displacement pump has been invented. The operation principle of the pump will be described with reference to FIGS.
(A) The flat mover 1 is installed in the stator 2 surrounding it, and the pump chamber 3 is formed. (B) By making the mover 1 have an inclination 4, a part 5 of the mover 1 is brought into contact with or close to the stator 2 in a linear manner. (C) The outer periphery 6 of the mover 1 is brought into contact with or close to the stator 2. (D)
A notch 7 is provided in a part of the mover 1. (E) Mover 1
A partition 8 is provided in a part of the stator 2 so as to mesh with the notch 7 of the stator 2. (F) An inflow port 9 and an outflow port 10 are provided on the stator 2 with the partition 8 interposed therebetween. (G) By changing the direction of the inclination 4 of the mover 1 via the movable shafts 12 and 13 without rotating the mover 1 itself, the mover 1 and the stator 2 come into linear contact or come close to each other. Is moved in the circumferential direction 11 along the mover 1. (H) Before and after the portion 5 which is linearly in contact with or in proximity to the fluid, suction and retraction of the fluid are simultaneously performed, and the fluid moves in the circumferential direction 11 along the mover 1. (I) Since there is an inlet 9 and an outlet 10 with the partition 8 of the stator 2 as a boundary, fluid flows from the inlet 9 to the outlet 10
Moves to and exerts a pump action. (G) Since the pump action occurs in the pump chambers 3 on the upper and lower surfaces of the mover 1,
The two pump outputs are added to provide a continuous flow pump.
(R) Furthermore, by sealing the movable shaft with a membrane
A more complete seal is obtained. The pump action is performed based on the above principle.

[0005]

(A) The pump is designed so that the center of gravity of the mover is located at the center of operation of the mover, so that the center of gravity does not move and no vibration occurs. (B) The use of a disk-shaped mover has low inertia and does not require a complicated operation mechanism, so that both sides are excellent in energy efficiency. (C) Since the pump action is exerted on both the upper and lower surfaces of the mover, the volume efficiency is excellent. (D) Since a part of the mover is linearly in contact with or close to the stator, the inflow port and the outflow port are not directly continuous with each other, and therefore, the fluctuation of the pump output with respect to the fluctuation of the after-load is small. (E) Since the flow is continuous, there is no pulsation in pressure and flow rate. (F) When a movable shaft is used for the movement of the movable member, the movable member itself does not rotate, so that if a film is provided between the movable member and the stator, a complete seal of the movable shaft can be obtained. With the advantage that.

[0006]

Embodiments of the present invention will be described below . 3 and 4 show the structure of an embodiment of the present pump. Mover 1
Was manufactured using an aluminum disk having a thickness of 1 mm and a diameter of 58 mm, and was provided with a notch 7 corresponding to a sandwiching angle of 20 °. The stator 2 has a maximum inner diameter of 60 mm and a maximum lumen height of 15 m.
m, made of acrylic with a volume of 25 ml, and a pinch angle of 12
A partition 8 corresponding to ° was provided. Mover 1 and stator 2
The clearance between the portion 5 in contact with or close to the line and the outer periphery 6 of the mover 1 and the stator 2 is 0.5
mm, but was actually 0.5 to 1 mm.
A movable shaft was used as a mechanism for changing the direction of the tilt 4 of the mover 1. The movable shaft is composed of a crankshaft 12 and a bearing 13 fixed to the mover 1, and the inclination 14 of the crankshaft 12 becomes the inclination 4 given to the mover 1, and the crankshaft 1
By rotating 2, the direction of the inclination 4 of the mover 1 is changed, and the portion 5 of the mover 1 and the stator 2 that is in contact or close to a line is moved in the circumferential direction 11 along the mover.
Assuming that a liquid is used as the fluid, a non-stretchable film 15 having a thickness of 0.4 mm is used for sealing the movable shaft, and one of the films 15 is fixed to the mover 1 and the other is fixed to the stator 2. It was done by doing. FIG. 5 shows the pump output when water is used as the fluid in this configuration. In calculation, if the clearance 5 between the movable element 1 and the stator 2 in linear contact or close proximity and the outer circumference 6 of the movable element 1 and the stator 2 is zero, a flow rate of 37.5 l / min is obtained. Should be done. Further, in the first embodiment, it was found that by injecting the fluid from the inflow port 9, the rotational movement of the crankshaft 12 could be taken out, and the pump could be operated as a motor. Regarding the mover, it is considered that a disk shape is suitable when it is made of metal,
When made of resin or elastic material, it is considered that a disk shape with a thick central portion is suitable in consideration of strength. The form of the mover does not need to be particularly circular, and may be designed in consideration of the form of the stator. Further, when the viscosity of the fluid is very high, it is possible to cope with the viscous resistance by using a plurality of movers superimposed on one stator (FIG. 6). Regarding the mechanism to change the direction of the tilt of the mover, as a method using a movable shaft, a method in which a bearing is fixed to the mover and a crankshaft is rotated, or a method in which the shaft is fixed to the mover and the angle is There is a method of holding and installing and rotating the bearing. Further, there is a method in which a permanent magnet provided on the mover and an electromagnet provided on the stator are used with the center of the mover as a supporting point. Regarding the mechanism for stopping the rotation of the mover, the notch of the mover meshes with the partition of the stator, so a special mechanism is not required with a simple pump, but if friction in this part is a problem, A method of separately providing a fixed shaft for the rotation stop on the mover, a method of engaging a bevel gear between the mover and the stator, a method of manufacturing a seal film of the moveable shaft with a non-stretchable material, There is a method to prevent rotation. The stator is preferably made of a rigid body in terms of efficiency, but if it is desired to have a self-adjustment function against excessive negative pressure, it is better to make the stator partially elastic. In addition, if a method is used in which a part of the stator is made of a membrane and fixed to the mover at the seal portion of the movable shaft as it is (FIG. 7), a very small pump can be easily manufactured.

[0007]

According to the present invention, there is no vibration, excellent energy efficiency, excellent volumetric efficiency, small fluctuations in pump output with respect to fluctuations in the afterload, no pulsation in pressure and flow, and A pump can be made that provides a complete movable shaft seal with the membrane.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view of the present invention.

FIG. 2 is a side sectional view of the present invention.

FIG. 3 is an assembled perspective view of Embodiment 1 of the present invention.

FIG. 4 is a side sectional view of the first embodiment of the present invention.

FIG. 5 shows the results of an example of the present invention.

FIG. 6 is a side sectional view when two movers are used in the present invention.

FIG. 7 is a side sectional view of a case where a part of a stator is made of a film in the present invention.

[Explanation of symbols]

1 is a mover 2 is a stator 3 is a pump chamber 4 is a tilt of the mover 5 is a part where a part of the mover and a part of the stator are in linear contact or close proximity 6 is an outer periphery of the mover 7 Notch 8 of mover 8 is a partition provided in a part of the stator 9 is an inlet 10 is an outlet 11 is a circumferential direction along the mover 12 is a crankshaft 13 is a bearing 14 is a crankshaft inclination 15 is a membrane 16 Is the lid

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F04C 2/30 F04C 3/00 F04C 9/00

Claims (2)

(57) [Claims] (1) A flat movable element (1) is installed in a stator (2) surrounding the movable element (1) to form a pump chamber (3). (B) By making the mover 1 have an inclination 4, a part 5 of the mover 1 is brought into contact with or close to the stator 2 in a linear manner. (C) The outer periphery 6 of the mover 1 is brought into contact with or close to the stator 2. (D) A notch 7 is provided in a part of the mover 1. (E) A partition 8 is provided in a part of the stator 2 so as to mesh with the notch 7 of the mover 1. (F) An inflow port 9 and an outflow port 10 are provided on the stator 2 with the partition 8 interposed therebetween. (G) The mover 1 itself is not rotated, and the flat mover 1
By changing the direction of the inclination 4 of the mover 1 via a movable shaft passing through the central portion, the portion 5 where the mover 1 and the stator 2 are in linear contact or close to each other is circumferentially moved along the mover 1. Move in the direction 11. (H) The flat mover 1 is located at the center of both sides,
Is fixed to the mover 1, and the other is facing the pump chamber 3 of the stator 2.
A pair of membranes 15 fixed at the part where
I did. A positive displacement pump configured as described above. (2) A flat movable element (1) is installed in a stator (2) surrounding the movable element (1) to form a pump chamber (3). (B) By making the mover 1 have an inclination 4, a part 5 of the mover 1 is brought into contact with or close to the stator 2 in a linear manner. (C) The outer periphery 6 of the mover 1 is brought into contact with or close to the stator 2. (D) A notch 7 is provided in a part of the mover 1. (E) A partition 8 is provided in a part of the stator 2 so as to mesh with the notch 7 of the mover 1. (F) An inflow port 9 and an outflow port 10 are provided on the stator 2 with the partition 8 interposed therebetween. (G) By changing the direction of the inclination 4 of the mover 1 via the movable shaft without rotating the mover 1 itself, a portion 5 in which the mover 1 and the stator 2 are in linear contact or close to each other. To
It is moved in the circumferential direction 11 along the mover 1. (H) A part of the stator 2 is made of a film, and is fixed to the mover 1 at the seal of the movable shaft as it is. A positive displacement pump configured as described above.