CN114320476B

CN114320476B - Vane type pneumatic motor

Info

Publication number: CN114320476B
Application number: CN202210008422.8A
Authority: CN
Inventors: 卢卫根
Original assignee: Suzhou Mingzhi Technology Co Ltd
Current assignee: Suzhou Mingzhi Technology Co Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2023-04-21
Anticipated expiration: 2042-01-05
Also published as: CN114320476A

Abstract

The invention belongs to the technical field of pneumatic motor manufacturing, in particular to a vane type pneumatic motor, which comprises a cylindrical shell with openings at two ends, wherein a stator is coaxially and hermetically arranged in the shell, a rotor is eccentrically and axially arranged in the stator in a rotating way, four slots are axially arranged on the circumferential surface of the rotor at equal intervals, vanes are inserted in the slots in a sliding way, the length of each vane is longer than the distance from a notch of any slot to the inner circumferential surface of the stator and is smaller than the depth of the slot, the outer circumferential surface of the rotor is tangential to the inner circumferential surface of the stator, an air inlet structure and an air outlet structure which are communicated with the inside of the stator are arranged in the shell, the air outlet structure is arranged on one side of a plane where a tangent line of the rotor and the stator is located together with the central axis of the stator, and the air inlet structure is arranged on the other side of the plane where the tangent line of the rotor and the central axis of the stator are located together in the shell, and the problem that the conventional vane type pneumatic motor is difficult to manufacture due to the fact that the inner cross section of the stator is processed to be non-circular is solved.

Description

Vane type pneumatic motor

Technical Field

The invention belongs to the technical field of pneumatic motor manufacturing, and particularly relates to a vane type pneumatic motor.

Background

And the pneumatic actuator converts the pressure energy of the compressed gas into mechanical energy and generates rotary motion in pneumatic transmission. The pneumatic motor is usually a positive displacement pneumatic motor, which uses the volume change of the working chamber to apply work, such as vane type, piston type and gear type.

A pneumatic motor is a device that converts the pressure energy of compressed air into rotational mechanical energy. Its function corresponds to an electric or hydraulic motor, i.e. to output a torque to drive the mechanism in a rotary motion.

However, the existing positive displacement vane air motor mainly relies on changing the shape of the inner cross section of the stator to realize the volume change, and the processing of the inner surface of the stator has requirements on the technical level of clamps, cutters and manufacturing workers, thus increasing the manufacturing difficulty

Disclosure of Invention

The invention aims at overcoming the defects of the prior art, adopts a mode of eccentrically arranging a stator and a rotor and enabling the inner peripheral surface of the stator to be tangent to the outer peripheral surface of the rotor, and solves the problem that the manufacturing difficulty is high because the existing vane type pneumatic motor depends on the fact that the inner cross section of the stator is processed into a non-circular shape.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the utility model provides a vane type pneumatic motor, includes both ends opening and is the casing of tube-shape, coaxial airtight is equipped with the stator in the casing, eccentric and axial rotation are equipped with the rotor in the stator, equidistant axial is equipped with four slots on the periphery of rotor, sliding grafting has the blade in the slot, the length of blade is greater than arbitrary slot's notch to the distance of the inner peripheral surface of stator is less than the degree of depth of slot, the outer peripheral surface of rotor with the inner peripheral surface of stator is tangent, be equipped with in the casing and communicate the inside inlet structure of stator and the structure of giving vent to anger, one side of the plane that the tangent line of rotor and stator and the axis of stator together in the casing sets up the structure of giving vent to anger, the opposite side of the plane that the tangent line of rotor and stator and the axis of stator are together in the casing sets up the inlet structure.

Preferably, the air outlet structure comprises a through hole and a plane wall, the plane wall is arranged on one side of a plane where a tangent line of the rotor and the stator and a central axis of the stator are located together on the outer peripheral surface of the stator, a plurality of through holes are formed in the plane wall, a cover body A and a cover body B which are connected with the stator in a sealing mode are respectively arranged at two ends of the stator in the shell, a central shaft at one end of the stator penetrates through and extends out of the cover body B, a notch is formed in the cover body A, corresponding to the position of the plane wall outside the stator, and the notch is communicated with a cavity formed by the plane wall and the surface of the shell.

Preferably, the air inlet structure comprises an air inlet, the air inlet is arranged on the cover body A, and the shape and the size of the air inlet are larger than the thickness of the blades and smaller than the shape and the size of a fan formed by two adjacent blades.

Preferably, the slot is eccentrically arranged on the circumferential surface of the rotor.

Preferably, a control valve with an output end communicated with the air inlet is arranged on one side, facing away from the cover body B, of the cover body A in the shell, a gap is preset between the outer peripheral surface of the control valve and the inner peripheral surface of the shell, and the gap is communicated with a space formed by the plane wall and the inner surface of the shell through the gap.

Preferably, the shell is provided with a ventilation joint at one end facing the cover body A, the ventilation joint comprises a bottom cover and a ventilation nozzle, the ventilation nozzle is vertically arranged on the bottom cover in a penetrating mode, a plurality of ventilation holes are formed in the bottom cover outside the ventilation nozzle, the ventilation nozzle is communicated with the input end of the control valve at one end facing the bottom cover, an adjusting knob of the control valve penetrates through the outside of the shell, and the ventilation holes are communicated with the gap.

Preferably, a coupling is arranged outside the cover B on the central shaft of the rotor.

Preferably, one end of the blade facing the notch of the slot is an arc inclined plane, and one side of the arc inclined plane facing the rotor rotating direction is lower than one side of the arc inclined plane facing away from the rotor rotating direction.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention adopts a mode of eccentrically arranging the stator and the rotor and enabling the inner peripheral surface of the stator to be tangent with the outer peripheral surface of the rotor, and the vane type pneumatic motor which enables the inner cross section of the stator to be directly processed into a round shape is arranged, so that the problem that the manufacturing difficulty is high because the existing vane type pneumatic motor depends on the inner cross section of the stator to be processed into a non-round shape is solved.

2. According to the invention, the plane wall and the through hole are arranged, so that a cavity is formed between the outer wall of the stator and the inner wall of the shell, and gas in the stator flows out; and the arrangement of the notch enables the gap and the inner wall of the shell to form an air outlet for air flow to flow out of the stator, so that the air can flow out of the stator through the gap.

3. The control valve with the output end communicated with the air inlet is arranged on one side, facing away from the cover body B, of the cover body A in the shell, the flow of air flow entering the stator is controlled through the control valve, so that the rotating speed of the rotor is controlled, a gap is preset between the outer peripheral surface of the control valve and the inner peripheral surface of the shell, the gap is communicated with a space formed by the plane wall and the inner surface of the shell through the gap, and gas flowing out of the stator can flow out of the shell through the gap.

Drawings

FIG. 1 is a schematic view of the external structure of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view of A-A of FIG. 1;

FIG. 3 is a schematic view of the structure of the invention with the housing removed;

FIG. 4 is a schematic view of the left side of FIG. 3;

FIG. 5 is a schematic illustration of the structure of FIG. 4 with the control valve and vent fitting removed;

FIG. 6 is a graph of rotor versus blade;

fig. 7 is a schematic view of the right side of fig. 1.

1, a shell; 2. a stator; 3. a rotor; 4. a slot; 5. a blade; 6. a through hole; 7. a planar wall; 8. a cover body A; 9. a cover body B; 10. a notch; 11. an air inlet; 12. a control valve; 13. a bottom cover; 14. an aeration nozzle; 15. a vent hole; 16. a coupling; 17. an arc-shaped inclined plane.

Detailed Description

Referring to fig. 1-7, a vane type pneumatic motor comprises a cylindrical shell 1 with two open ends, wherein a stator 2 is coaxially and hermetically arranged in the shell 1, a rotor 3 is eccentrically and axially arranged in the stator 2 in a rotating manner, four slots 4 are axially arranged on the circumferential surface of the rotor 3 at equal intervals, vanes 5 are slidably inserted in the slots 4, the length of each vane 5 is larger than the distance from a notch of any one slot 4 to the inner circumferential surface of the stator 2 and smaller than the depth of the slot 4, the outer circumferential surface of the rotor 3 is tangential to the inner circumferential surface of the stator 2, an air inlet structure and an air outlet structure which are communicated with the inside of the stator 2 are arranged in the shell 1, the air outlet structure is arranged on one side of a plane where a tangent line of the rotor 3 and the stator 2 is located together with the central axis of the stator 2 in the shell 1, and the air inlet structure is arranged on the other side of the plane where the tangent line of the rotor 3 and the central axis of the stator 2 are located together in the shell 1.

In this embodiment, when in use, air enters the stator 2 from the air inlet structure, pushes the blades 5 to rotate the rotor 3, and because the blades 5 are slidably connected with the slots 4 provided on the rotor 3, the blades 5 have a tendency to deviate from the central axis of the rotor under the action of centrifugal force, so that in the rotation process, when the blades 5 move to the position where the rotor 3 does not contact with the inner surface of the stator 2, the tips of the blades 5 can still contact with the inner surface of the housing 1, and when the blades 5 move to the position where the rotor 3 is tangential to the stator 2, the blades 5 can retract into the slots 4 under the action of the inner surface of the stator 2, thereby solving the problem that the conventional blade type air motor is difficult to manufacture due to the fact that the inner cross section of the stator is processed to be non-circular.

As a preferred mode, the air outlet structure comprises a through hole 6 and a plane wall 7, the plane wall 7 is arranged on one side of a plane where a tangent line of the rotor 3 and the stator 2 and a central axis of the stator 2 are located on the outer peripheral surface of the stator 2, a plurality of through holes 6 are arranged on the plane wall 7, a cavity is formed between the outer wall of the stator 2 and the inner wall of the shell 1 through the arrangement of the plane wall 7, air in the stator 2 flows out, a cover body A8 and a cover body B9 which are in airtight connection with the stator 2 are respectively arranged at two ends of the stator 2 in the shell 1, a central axis of one end of the stator 2 penetrates through and extends out of the cover body B9, a notch 10 is arranged on the cover body A8, corresponding to the plane wall 7, the notch 10 is communicated with a cavity formed by the surface of the shell 1, and an air outlet which flows out of the stator 2 can be formed between the notch 10 and the inner wall of the shell, and the air can flow out of the stator 2 through the notch 10.

As a preferred mode, the air inlet structure includes an air inlet 11, the air inlet 11 is arranged on the cover body A8, the shape and size of the air inlet 11 is larger than the thickness of the blades 5 and smaller than the shape and size of a fan formed by two adjacent blades 5, so that the air inlet 11 can prevent the air from flowing into the stator 2 to impact the blades 5 when the blades 5 are positioned at the air inlet 11.

In a preferred manner, the slots 4 are arranged eccentrically on the circumferential surface of the rotor 3, so that a greater torque is produced when the gas impinges on the blades, so that the rotational speed of the rotor 3 is high when in use.

As a preferable mode, a control valve 12 with an output end communicated with the air inlet 11 is arranged on one side of the cover body A8, facing away from the cover body B9, in the shell 1, the flow rate of air flow entering the stator 2 is controlled through the control valve 12, so that the rotating speed of the rotor 3 is controlled, a gap is preset between the outer peripheral surface of the control valve 12 and the inner peripheral surface of the shell 1, the gap is communicated with a space formed by the plane wall 7 and the inner surface of the shell 1 through the gap 10, and the air flowing out of the stator 2 can flow out of the shell 1 through the gap.

As a preferred mode, the casing 1 is provided with a ventilation joint at one end facing the cover body A8, the ventilation joint comprises a bottom cover 13 and a ventilation nozzle 14, the ventilation nozzle 14 is vertically arranged on the bottom cover 13 in a penetrating mode, a plurality of ventilation holes 15 are arranged on the bottom cover 13 outside the ventilation nozzle 14, the ventilation nozzle is communicated with the input end of the control valve 12 towards one end in the bottom cover 13, an adjusting knob of the control valve 12 penetrates through the casing 1, the ventilation holes 15 are communicated with the gap, and thus the air flow entering the stator 2 and the air flow exiting the stator 2 are separated through the ventilation nozzle 14 and the ventilation holes 15 respectively arranged on the bottom cover 13, and the operation is convenient.

As a preferable mode, a coupling 16 is provided outside the cover B9 on the central shaft of the rotor 3, and a drill bit can be connected by providing the coupling 16.

As a preferable mode, one end of the blade 5 facing the slot opening of the slot 4 is an arc inclined plane 17, and one side of the arc inclined plane 17 facing the rotating direction of the rotor 3 is lower than one side of the arc inclined plane 17 facing away from the rotating direction of the rotor 3, and the arc inclined plane 17 can avoid the problems that when the rotor 3 rotates, the contact area between the blade 5 and the inner surface of the shell 1 increases, the friction force increases to influence the rotating speed of the rotor 3, and heat is generated.

Claims

1. The vane type pneumatic motor is characterized by comprising a cylindrical shell (1) with openings at two ends, wherein a stator (2) is coaxially and hermetically arranged in the shell (1), a rotor (3) is eccentrically and axially arranged in the stator (2) in a rotating manner, four slots (4) are axially arranged on the circumferential surface of the rotor (3) at equal intervals, vanes (5) are slidably inserted in the slots (4), the length of each vane (5) is larger than the distance from a notch of any one slot (4) to the inner circumferential surface of the stator (2) and smaller than the depth of the slot (4), the outer circumferential surface of the rotor (3) is tangent to the inner circumferential surface of the stator (2), an air inlet structure and an air outlet structure which are communicated with the inside of the stator (2) are arranged in the shell (1), one side of a plane where a tangent line of the rotor (3) and the stator (2) is located and the central axis of the stator (2) is located in the other side of the shell (1), and the other side of the plane where the tangent line of the rotor (3) and the central axis of the stator (2) are located is located in the shell (1); the air outlet structure comprises a through hole (6) and a plane wall (7), wherein the plane wall (7) is arranged on one side of a plane where a tangent line of a rotor (3) and the stator (2) and a central axis of the stator (2) are located together on the outer peripheral surface of the stator (2), a plurality of through holes (6) are formed in the plane wall (7), a cover body A (8) and a cover body B (9) which are hermetically connected with the stator (2) are respectively arranged at two ends of the stator (2) in the shell (1), a central shaft at one end of the stator (2) penetrates through and extends out of the cover body B (9), a notch (10) is formed in the cover body A (8) at the position, corresponding to the plane wall (7), outside the stator (2), and the notch (10) is communicated with a cavity formed by the surface of the shell (1). The air inlet structure comprises an air inlet (11), the air inlet (11) is arranged on the cover body A (8), and the shape and the size of the air inlet (11) are larger than the thickness of the blades (5) and smaller than the shape and the size of a fan formed by two adjacent blades (5); a control valve (12) with an output end communicated with the air inlet (11) is arranged on one side, facing away from the cover body B (9), of the cover body A (8) in the shell (1), a gap is preset between the outer peripheral surface of the control valve (12) and the inner peripheral surface of the shell (1), and the gap is communicated with a space formed by the plane wall (7) and the inner surface of the shell (1) through the gap (10); the utility model discloses a novel air conditioner, including casing (1), lid A (8), casing (1) are gone up towards the one end of lid A (8) is equipped with the joint of ventilating, the joint of ventilating includes bottom (13) and breather nozzle (14), breather nozzle (14) run through perpendicularly and locate on bottom (13), be in on bottom (13) breather nozzle (14) are equipped with a plurality of air vents (15) outward, breather nozzle orientation one end in bottom (13) intercommunication the input of control valve (12), the adjust knob of control valve (12) runs through outside casing (1), air vent (15) intercommunication the clearance.

2. The vane-type air motor according to claim 1, wherein the slot (4) is eccentrically provided on the circumferential surface of the rotor (3).

3. The vane-type air motor according to claim 1, wherein a coupling (16) is provided outside the cover B (9) on the central axis of the rotor (3).

4. The vane-type air motor according to claim 1, wherein one end of the vane (5) facing the slot opening of the slot (4) is an arc-shaped inclined surface (17), and one side of the arc-shaped inclined surface (17) facing the rotating direction of the rotor (3) is lower than one side of the arc-shaped inclined surface (17) facing away from the rotating direction of the rotor (3).