WO2009121250A1

WO2009121250A1 - A positive-displacement mechanism for a rotary fluid machine

Info

Publication number: WO2009121250A1
Application number: PCT/CN2009/070495
Authority: WO
Inventors: 贲铭鑫
Original assignee: Ben Mingxin
Priority date: 2008-04-01
Filing date: 2009-02-20
Publication date: 2009-10-08
Also published as: CN101251106A

Abstract

A positive-displacement mechanism for a rotary fluid machine includes an outer roller (1), a following rotor (2), an inner roller (3) and a synchronous sliding plate (4). The following rotor (2) is located in the outer roller (1), and the inner roller (3) is located in the following rotor (2). The outer roller (1) is coaxial to the inner roller (3) at a roller axial center (31). An outer circumference of the inner roller (3) is kept tangent to an inner circumference of the following rotor (2), and an outer circumference of the following rotor (2) is kept tangent to an inner circumference of the outer roller (1). The synchronous sliding plate (4) is connected with the inner roller (3), its middle part is kept slidably contacting with an opening groove provided in a circumference of the following rotor (2), and its front end is kept in connection with the inner circumference of the outer roller (1).

Description

Rotary fluid mechanical variable capacity mechanism

The invention particularly relates to a rotary fluid mechanical variable capacity mechanism, belonging to the field of fluid machinery. It can be used in fluid working machines (including pumps, fans and compressors) and fluid motive machines. Background technique

The volumetric fluid machine mainly has two kinds of variable displacement modes: reciprocating type and rotary type.

The reciprocating fluid mechanical variable capacity method has a complicated structure, and the reciprocating motion has large inertia and is difficult to balance. The relative movement speed of the piston and the cylinder is large, the wear is severe, and the efficiency is low.

The variable capacity mechanism of the rotary fluid machine has a high-speed sweeping movement or meshing motion, and the machining process is complicated, and the machining precision is high.

The above several variable-capacity mechanisms have a common problem, that is, severe wear, low efficiency, complicated process, and high precision requirements.

Recently, a synchronous rotary varactor mechanism has emerged, but since the slide plate has a cantilever structure and the working cavity has a crescent shape, the working pulse is large, and the reliability and efficiency are still not maximized. Summary of the invention

Technical Problem: An object of the present invention is to provide a rotary fluid mechanical varactor mechanism having a working space of a cylindrical space, a small working pulse, a simple and reliable structure, a small number of parts, and high efficiency. It can be used in both fluid working machines and fluid motive machines. There is no dead point when using the prime mover.

Technical Solution: The rotary fluid mechanical variable capacity mechanism of the present invention comprises an outer drum, a follower rotor, an inner drum and a synchronous slide; the follower rotor is located in the outer drum, the inner drum is located in the follower rotor, and the outer drum is coaxial with the inner drum The center of the inner drum is tangential to the inner circumference of the follower rotor, and the outer circumference of the follower rotor is tangent to the inner circumference of the outer drum; the synchronous slide is vertically connected to the inner drum, and the middle of the synchronous slide The sliding contact is maintained in contact with the open groove provided on the circumference of the follower rotor, and the front end of the synchronous slide is connected to the inner circumference of the outer drum. a cylindrical shape is arranged at the opening on the circumference of the follower rotor, and a right sealing groove and a left sealing groove are arranged at the opening, a right-hand sealing is arranged in the right sealing groove, and a left-hand sealing is arranged in the left sealing groove. The synchronizing skateboard is located between the left-handed seal and the right-handed seal.

The outer diameter of the follower rotor is the sum of the radius of the inner surface of the outer drum and the radius of the outer surface of the inner drum plus its own wall thickness, and the inner diameter is the sum of the radius of the inner surface of the outer drum and the radius of the outer surface of the inner drum minus itself The wall thickness of the follower rotor is respectively provided with a circular left seal groove and a right seal groove on both sides, the left rotary seal is installed in the left seal groove of the follower rotor, and the right rotary seal is installed in the right seal groove of the follower rotor The follower rotor is located in the outer drum and outside the inner drum, and its rotating shaft is called the rotor shaft center, which does not coincide with the drum shaft center, and the distance between the two is the difference between the radius of the inner surface of the follower rotor and the outer surface radius of the inner drum; The outer surface of the moving rotor is tangent to the inner surface of the outer drum to the outer cutting point,

The inner surface of the follower rotor is tangent to the outer surface of the inner drum at an inscribed point; the synchronous slide is inserted between the left and right sides of the inner and outer drums in a radial direction, and the left and right swirls can follow the follower rotor The sliding slides on both sides of the synchronous sliding plate, and the synchronous sliding plate can be oscillated in the cylindrical hole formed by the left sealing groove and the right sealing groove of the following rotor, and one side of the synchronous sliding plate and the outer roller are fixedly connected to the external contact point. The other side is fixed to the inner roller at the inner contact point.

Since the outer drum and the inner drum are located at the same axis, the outer drum and the inner drum are rigidly connected by the synchronous slide, and the outer drum and the inner drum rotate together with the drum axis; the follower rotor is inserted into the circle composed of the outer drum and the inner drum. In the cylindrical space, the opening spans both sides of the synchronous sliding plate, and the left and right rotary seals installed in the left and right sealing slots are slidingly sealed with the synchronous sliding plate, and can slide and swing along the synchronous sliding plate during operation. The follower rotor rotates around the rotor axis, and the outer surface and the inner surface of the outer drum are always tangential to the outer cutting point, and the inner surface and the outer surface of the inner drum are always tangent to the inner cutting point. The working chamber formed by the inner surface of the outer drum, the outer surface of the follower rotor and the sealing line formed by the outer cutting point is divided into a working chamber and two working chambers by the synchronous sliding plate, and the outer surface of the inner drum, the inner surface of the following rotor and the inner cutting point are also The working cavity formed by the formed sealing line is divided into four working chambers, such as three working chambers and four working chambers, by the synchronous sliding plate. The area of the four working chambers is cylindrical, not crescent-shaped, so the working pulse is small and the efficiency is higher. When the outer or inner drum rotates clockwise or counterclockwise, the synchronous slide will drive the follower rotor to rotate together, and the direction is the same. The time taken for one revolution is equal, and the relative movement distance between the outer and inner tangent points is only The difference between the circumferences of the two surfaces is tangent, so the relative motion of the mechanism is small, the parts wear is small, and the efficiency is high. Since the rotor axis does not coincide with the axis of the drum, the follower rotor will slide back and forth on both sides of the synchronous slide when rotating, and the volume of the four working chambers will change regularly as the angle of rotation increases.

The following is a description of the working process only when the working machine is rotated counterclockwise:

Assume that the minimum value of the working chamber is 0 and the maximum value is 1. IJ:

When _α = 0°, one working chamber = 0, two working chamber = 1, three working chamber = 0.5, four working chamber = 0.5; when a = 180°, one working chamber = 0.5, two working chamber = 0.5, Three working chambers = 1, four working chambers = 0; when α = 360°, one working chamber = 1, two working chambers = 0, three working chambers = 0.5, four working chambers = 0.5; when a = 540. When, a working chamber = 0.5, two working chambers = 0.5, three working chambers = 0, four working chambers = 1; When a = 720°, a working cavity = 0, two working chambers = 1, three working chambers = 0.5, and four working chambers = 0.5; as can be seen from the above, when α changes from 0 degrees to 720 degrees, a job The volume of the cavity is from 0→0.5→1→0.5→0; the second working cavity is from 1→0.5→0→0.5→1; the volume of the three working chamber is from 0.5→1→0.5→0→0.5; Then from 0.5 → 0 → 0.5 → 1 → 0.5.

Since the volume of the four working chambers is regular with the cyclical change of the rotation angle,

Modes can be diversified. The fluid can be from a working chamber to a working chamber, a working chamber, a working chamber, a working chamber, a working chamber, a working chamber, a working chamber, and a working chamber, and a working chamber and a working chamber. Then go to the two working chambers and the four working chambers, etc., the working process is basically similar, but each has its own characteristics, which can be selected according to specific requirements.

For example, when working in the counterclockwise direction of the working machine, press a working chamber, a working chamber, a working chamber, a working chamber, and a working chamber mode as an example. When α rotates from 0 degrees to Φ, a working chamber volume gradually becomes larger, and the fluid enters a working chamber; when rotated to a = 360 degrees, a working chamber volume becomes maximum, and the inflow process ends; (1 > 360 degrees, the volume of the two working chambers becomes smaller, the compression starts, the fluid is forced out of the two working chambers, enters the three working chambers to be compressed again; when rotated to α = 540 degrees, the three working chambers become the largest volume Value, the end of the three working chamber inflow process; when turning to (1 > 540 degrees, the volume of the four working chambers becomes smaller, the compression begins, the fluid is forced out of the four working chambers after being compressed again; when it is rotated to a = 900 degrees, The volume of the four working chambers is changed to the minimum value, and the recompression process is finished, the fluid is discharged, and the volume of the working chamber has become larger again, and the inflow process is performed. In this cycle, the flow in and out of the fluid are simultaneously performed in the four working chambers. Therefore, work efficiency is high.

When working as a motive machine, its working mode is similar to that of a working machine. However, due to the clever structure, the working chambers on the inner and outer sides of the follower rotor are misaligned by 180 degrees, so there is no dead point when the prime mover is used, and the efficiency is high, and it is easy to change the direction of rotation.

One or more holes may be respectively provided at the outer contact of the outer drum or on both sides for the passage of the fluid, and the valve may be disposed in the tunnel as needed; one or more holes may be respectively provided at the inner joint of the inner drum or on both sides for the passage of the fluid, and The valve can be placed in the tunnel as needed; in the synchronous sliding plate, a hole shaped like a "Ζ" or a shape like "[" can be arranged to connect the relevant working chamber according to different working mode requirements, and can be connected as needed Place a valve in the tunnel.

Since the volume of the two working chambers on the outer side of the follower rotor is larger than the volume of the two working chambers on the inner side, that is, the maximum volume of one working chamber or two working chambers is larger than the maximum volume of the three working chambers or the four working chambers, and the phases are different by 180 degrees, With the change of the rotation angle, the volume change rate of the four working chambers is not completely uniform. The valves placed in different parts not only control the flow of the fluid in and out, but also prevent the fluid from flowing in the working chamber. The ineffective flow between them not only solves the problem of liquid hammer, but also provides additional supplementation when the chamber is under pressure, further improving efficiency.

In addition, the mechanism can be nested in multiple layers and compact to suit different requirements.

Advantageous Effects: Since the inner surface of the outer drum of the present invention and the outer surface of the inner drum are fixed by a synchronous slide

Connected and rotated around the same fixed axis, the follower rotor rotates around its own fixed axis, there is no reciprocating inertial force, easy to balance, reduce friction and sealing measures, high rigidity, flexible driving mode; external cutting point and inner cutting The relative movement speed at the point is extremely low, so the wear is greatly reduced; the working chamber is hollow cylindrical instead of crescent, so the working pulse is small and the efficiency is greatly improved; the mechanism can be rotated clockwise or counterclockwise, which can be used for The original mechanical machine can also be used for working machines. There is no dead point when using the prime mover. Multi-layer nested application, compact structure and wider application range.

In addition, the parts of the mechanism are simple in shape, easy to manufacture, simple to assemble, and require no complicated special equipment, making it easy to achieve serial mass production. DRAWINGS

Figure 1 is a schematic diagram of the structure of the whole machine.

Figure 2 is a schematic diagram showing the structure of the working principle of the whole machine.

Figure 3 is a schematic diagram of a multi-layered nested structure.

Description of the symbols

1 outer drum 11 outer drum inner surface

2 follower rotor 21 rotor shaft

22 right sealing slot 23 left sealing slot

24 follower rotor outer surface 25 follower rotor inner surface

3 inner drum 31 drum shaft

4 Synchronous Skateboard 41 External Contact

42 internal contacts

5 right-handed seal 51 left-handed seal

6 External point 61 Inscribed point

7 a working chamber 71 two working chamber

72 three working chambers 73 four working chambers

α The angle between the center line and the outer point of the slide section relative to the axis of the drum detailed description:

The inner surface of the outer drum and the outer surface of the inner drum are rigidly rigidly connected by a synchronous sliding plate; the outer drum and the inner drum are placed on the same axis; the left-handed seal is installed in the left sealing groove of the follower rotor, and the right-handed seal is rotated. In the right sealing groove of the follower rotor; the follower rotor is inserted into the cylindrical space composed of the outer drum and the inner drum, the opening is spanned on both sides of the synchronous sliding plate, and the left-handed seal is installed in the left sealing groove and the right sealing groove And the right-handed seal and the synchronous slide seal sliding fit; the follower rotor is placed on its own axis, does not coincide with the rotation axis of the inner and outer drums, the outer surface is tangent to the inner surface of the outer drum, the inner surface and the inner drum The outer surface is tangent.

The outer diameter of the follower rotor is the sum of the radius of the inner surface of the outer drum and the radius of the outer surface of the inner drum plus the wall thickness of the follower rotor, and the inner diameter is the sum of the radius of the inner surface of the outer drum and the radius of the outer surface of the inner drum. Wall thickness of the rotor

The axis of the follower rotor is spaced from the axis of the inner and outer drums as the difference between the radius of the inner surface of the follower rotor and the radius of the outer surface of the inner drum.

One or more channels may be respectively provided at the outer contact of the outer drum or on both sides for the passage of fluid, and may be

It is necessary to place a valve in the tunnel; one or more holes may be respectively provided at the inner or inner sides of the inner drum for fluid to pass through, and a valve may be placed in the tunnel as needed;

The "Z" shape or other shaped holes such as "[" shape, according to different working mode requirements, connect the relevant working chamber, and can place the valve in the hole as needed.

The inner surface of the outer drum and the outer surface of the inner drum are fixedly connected by a synchronous sliding plate and rotate together around the same fixed axis, and the follower rotor rotates around its fixed axis, which is easy to balance, reduce friction and seal, and has high rigidity. The driving method is flexible.

For external drums, inner drums, follower rotors, etc., measures such as excavation process holes and ribs can be used to reduce weight, increase strength, and balance.

The outer drum, inner drum, follower rotor, synchronous slide, left-hand seal, right-hand seal and other components can also be equipped with oil holes, oil passages, oil grooves, etc., for the relevant parts to be improved and lubricated.

The distance between the rotor axis and the drum axis can be set to be manually adjusted or adjusted by the pressure device of the fluid pressure to adjust the mating interval between the inscribed point and the extrinsic point, thereby reducing the machining accuracy requirement of the component. , extend the life of the machine.

The parts of the mechanism are simple in shape, easy to manufacture, simple to assemble, and require no complicated special equipment, making it easy to achieve serial mass production.

Claims

A rotary fluid mechanical varactor mechanism, characterized in that the mechanism comprises an outer drum (1), a follower rotor (2), an inner drum (3), a synchronous slide (4); a follower rotor (2) is located Inside the outer drum (1), the inner drum (3) is located in the follower rotor (2), and the outer drum (1) and the inner drum (3) are coaxial with the drum shaft center (31), and the inner drum (3) The circle is tangential to the inner circle of the follower rotor (2), and the outer circumference of the follower rotor (2) is tangent to the inner circle of the outer drum (1); the synchronous slide (4) and the inner roller

(3) Connected, the middle of the synchronous slide (4) is in sliding contact with the open groove provided on the circumference of the follower rotor (2), and the front end of the synchronous slide (4) is connected to the inner circumference of the outer drum (1) .

2. The rotary fluid machine varactor according to claim 1, wherein the opening is provided in a cylindrical shape on the circumference of the follower rotor (2), and a right sealing groove (22) is provided at the opening. , the left sealing groove (23), the right sealing ring (5) is provided with a right-hand sealing (5), and the left sealing groove (23) is provided with a left-hand sealing

(51), the synchronous slide (4) is located between the left-hand seal (51) and the right-hand seal (5).