CN109458227B

CN109458227B - Pneumatic motor

Info

Publication number: CN109458227B
Application number: CN201811491469.4A
Authority: CN
Inventors: 胡可亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2021-02-23
Anticipated expiration: 2038-12-07
Also published as: CN109458227A

Abstract

The invention discloses a pneumatic motor, which comprises a shell and a rotor rotatably arranged in the shell, wherein a hollow rotating shaft penetrating out of the shell is fixedly arranged on the rotor, an air inlet is formed in the side wall of the shell, the rotor is composed of more than two rotor units which are sequentially arranged from outside to inside, each rotor unit comprises three arc-shaped or linear rotating blades, the three rotating blades are enclosed into a triangle, air inlet gaps are kept between the heads and the tails of the adjacent rotating blades, the air inlet gaps of the adjacent rotor units are staggered, the rotor units deflect at a certain angle layer by layer, and an air flow channel is reserved between the adjacent rotor units; the hollow part formed by the innermost rotor unit is communicated with the hollow rotating shaft. The invention provides a pneumatic motor, which drives the inside of a rotor to enable the air flow introduced from the outside to be used for multiple times in the rotor so as to realize high-efficiency air flow utilization and obtain high-efficiency conversion and rotating speed.

Description

Pneumatic motor

Technical Field

The invention relates to the technical field of power devices, in particular to a pneumatic motor.

Background

The pneumatic motor is a device for converting compressed air potential energy into mechanical energy, and is widely applied to various power fields.

The existing pneumatic motor mainly comprises a shell and a rotor arranged in the shell, and power output (mainly embodied as rotation of a rotating shaft) is realized by driving the rotor to rotate through airflow. CN2014204432512 provides a pneumatic motor, and the pneumatic motor disclosed in CN201611031078, both of which mainly drive the outer side of the rotor by compressed air to realize rotation and finally realize rotation output of the rotating shaft.

This approach suffers mainly from the following problems: firstly, the air flow mainly works the outer side of the rotating vane, and the introduced air flow is exhausted through the exhaust hole after only part of the rotating vane is worked, so that the utilization efficiency of the air flow is not high; secondly, partial airflow is not discharged in time to form back pressure resistance, which influences the rotation of the rotor. The two points of mutual contradiction greatly restrict the conversion efficiency of the air flow in the pneumatic motor, and the rotating speed of the motor is difficult to increase.

Disclosure of Invention

In view of the above disadvantages, the present invention provides a pneumatic motor that drives the inside of a rotor blade to improve the efficiency of work.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pneumatic motor comprises a shell and a rotor which is rotatably arranged in the shell, wherein a hollow rotating shaft penetrating out of the shell is fixedly arranged on the rotor, an air inlet is formed in the side wall of the shell, the rotor is composed of more than two rotor units which are sequentially arranged from outside to inside, each rotor unit comprises three arc-shaped or linear rotating blades, the three rotating blades are enclosed into a triangle, air inlet gaps are reserved between the heads and the tails of the adjacent rotating blades, the air inlet gaps of the adjacent rotor units are staggered, the rotor units deflect at a certain angle layer by layer, and an air flow channel is reserved between the adjacent rotor units; the hollow part formed by the innermost rotor unit is communicated with the hollow rotating shaft.

Furthermore, the direction of the outlet of the air inlet on the inner side of the shell forms a certain angle with the radial direction of the shell, and the direction of the outlet of the air inlet on the inner side of the shell is consistent with the air inlet direction of the air inlet gap.

Furthermore, a plurality of air inlets are arranged on the inner side of the shell along the axial direction of the shell, and the air inlets are communicated with the air inlet in the side wall of the shell.

Further, the hollow rotating shaft is connected with the shell through a sealing bearing.

Further, at least one end face of the rotor is provided with a choke plate.

Compared with the prior art, the invention has the beneficial effects that: the invention provides a pneumatic motor, which drives the inside of a rotor to enable the air flow introduced from the outside to be used for multiple times in the rotor so as to realize high-efficiency air flow utilization and obtain high-efficiency conversion and rotating speed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic structural view (perspective view) of a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view (front view) of a preferred embodiment of the present invention;

FIG. 3 is a schematic structural view (front view) of a rotor in a preferred embodiment of the present invention;

FIG. 4 is a schematic view of the structure of a rotor in a preferred embodiment of the present invention (a perspective view in which the choke plate at the front end is not shown);

FIG. 5 is a schematic cross-sectional view of a rotor in a portion of a rotating unit in a preferred embodiment of the present invention;

FIG. 6 is a schematic view of the assembly of the rotor within the housing in a preferred embodiment of the invention (with the head of the front end not shown);

FIG. 7 is a schematic illustration of the cylinder liner of the housing in a preferred embodiment of the invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, a pneumatic motor according to a preferred embodiment of the present invention mainly includes a housing 10 and a rotor 20 rotatably disposed in the housing 10. Referring to fig. 1, 2, 6 and 7, the housing 10 is a hollow cylindrical structure, and mainly includes a cylinder sleeve 13 at the middle and cylinder covers 14 at two ends, and an air inlet 11 communicating with the inside of the housing 10 is opened on the side wall of the housing 10 to introduce an external air flow (compressed air) into the housing 10 and apply work to the rotor 20 to rotate the rotor 20. Referring to fig. 1 and 2, a hollow rotating shaft 24 penetrating through the housing 10 is fixedly disposed on the rotor 20, and the hollow rotating shaft 24 is connected to the housing 10 through a sealing bearing 30. As shown in fig. 3 to 5, the rotor 20 is composed of four rotor units arranged in sequence from outside to inside, each rotor unit includes three arc-shaped rotating blades 21, the three rotating blades 21 enclose a triangle, air inlet gaps 22 are maintained between the heads and the tails of the adjacent rotating blades 21, the air inlet gaps 22 of the adjacent rotor units are staggered, the front end of one rotating blade 21 in the same rotor unit is located at the inner side of the rear end of the adjacent rotating blade 21, the rotor units form deflection at a certain angle layer by layer, and an air flow channel is reserved between the adjacent rotor units; the hollow portion formed by the innermost rotor unit communicates with the hollow rotary shaft 24.

In practice, the external airflow is introduced into the housing 10 from the air inlet 11 and drives the rotor 20 to rotate, and the driving mainly has two action forms, one is driving the outer side wall of the rotor 20 (i.e. the outer side wall of the outermost rotating blade 21) to rotate the rotor 20, and the action form of the driving force is a common mode; the other is to enter the interior of the rotor 20 from the air inlet gap 22, flow inside the rotor 20, and drive the rotating vanes 20 inside the rotor 20 to drive the rotor 20 to rotate, i.e., the internal drive in the present invention. In the internal drive, when the airflow enters from the inlet gap 22, firstly acts on the inner side of one rotor unit 21 and flows in the airflow channel between the adjacent rotor units, and then passes through the inlet gap 22 of the adjacent rotor unit in the inner layer, part of the airflow still flows along the airflow channel in the layer and acts on the next rotor unit 21 (the action of the airflow entering from the next inlet gap 22 of the same rotor unit, and the arrangement that the front end of one rotor unit 21 in the same rotor unit is positioned on the inner side of the rear end of the adjacent rotor unit 21, so that the part of the airflow flows along the airflow channel in the layer instead of directly exiting from the next inlet gap 22 of the same rotor unit), the other part of the airflow enters from the inlet gap 22 of the rotor unit in the adjacent inner layer and acts on the rotor unit in the layer 21, and then passes through the inlet gap 22 of the rotor unit in the next adjacent inner layer, the airflow is divided again, and acts on the rotating blade 21 layer by layer; part of the air flow flowing along the same air flow channel and acting on the next rotating blade 21 on the same layer is divided again when passing through the air inlet gap 22 of the rotor unit on the next adjacent inner layer; the multiple times of flow distribution make the airflow act on the rotating blade 21 layer by layer to rotate the rotor 20, and finally the airflow flows out of the rotor 20 and the shell 10 from the hollow part formed by the innermost rotor unit through the hollow rotating shaft 24. By means of the mode that the airflow is divided inwards layer by layer and is driven internally, the airflow can be used for multiple times, and therefore conversion efficiency can be improved, and efficient efficiency conversion and rotating speed can be achieved. The air flow is divided inwards layer by layer, and finally flows out through the hollow rotating shaft 24 through the hollow part formed by the innermost rotor unit, so that the circulation of the air flow is facilitated, and the efficiency and the rotating speed are improved conveniently.

Referring to fig. 1, 6 and 7, three air inlets 11 are uniformly arranged along the circumferential direction of the housing 10 to fit into the three air inlet gaps 22 of the outermost rotor unit of the rotor 20. The outlet direction of the air inlet 11 on the inner side of the housing 1 forms a certain angle with the radial direction of the housing 10, and the outlet direction of the air inlet 11 on the inner side of the housing 10 is consistent with the air inlet direction of the air inlet gap 22. With this structure, the airflow introduced from the air inlet 11 is easy to drive the outside of the rotor 20, and also makes the airflow enter the air inlet gap 22 more easily, and the airflow direction consistent with the air inlet direction of the air inlet gap 22 can improve the rotation efficiency and the rotation speed of the rotor 20.

In a preferred embodiment, referring to fig. 7, a plurality of air inlet holes 12 are arranged and distributed along the axial direction of the housing 10 on the inner side of the housing 10, the air inlet holes 12 are communicated with the air inlet 11 in the side wall of the housing 10, and the direction of the outlet of the air inlet holes 12 on the inner side of the housing 10 is consistent with the air inlet direction of the air inlet gap 22. The air inlet gap 22 is formed by a strip-shaped opening on the outer side surface of the rotor unit, and by arranging the air inlet holes 12 distributed along the axial direction of the shell 10, the air flow enters from the air inlet 11, then exits from the air inlet holes 12 and blows to the rotor 20, the air inlet mode of the single point-shaped air inlet 11 can be changed into the air inlet mode of the point-shaped air inlet holes 12, and therefore the air flow can enter the air inlet gap 22.

In a preferred embodiment, referring to fig. 3, the two end faces of the rotor 20 are provided with air baffles 23, which can prevent the air flow from exiting from the end faces of the rotor 20 to affect the air flow flowing inside the rotor 20, so as to improve the efficiency; the interconnection and fixation between the rotor units can also be enhanced.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a pneumatic motor, including casing (10) and rotationally set up in rotor (20) in casing (10), fixed being equipped with on rotor (20) is worn out hollow rotating shaft (24) of casing (10), air inlet (11), its characterized in that have been seted up on the lateral wall of casing (10): the rotor (20) is composed of more than two rotor units which are sequentially arranged from outside to inside, each rotor unit comprises three arc-shaped or linear rotating blades (21), the three rotating blades (21) enclose a triangle, air inlet gaps (22) are reserved between the heads and the tails of the adjacent rotating blades (21), the air inlet gaps (22) of the adjacent rotor units are staggered, and the rotor units deflect at a certain angle layer by layer, so that air flow channels are reserved between the adjacent rotor units; the hollow part formed by the innermost rotor unit is communicated with the hollow rotating shaft (24).

2. The air motor according to claim 1, characterized in that: the direction of the outlet of the air inlet (11) on the inner side of the shell (10) and the radial direction of the shell (10) form a certain angle, and the direction of the outlet of the air inlet (11) on the inner side of the shell (10) is consistent with the air inlet direction of the air inlet gap (22).

3. The air motor according to claim 1, characterized in that: the inner side of the shell (10) is provided with a plurality of air inlets (12) which are distributed along the axial direction of the shell (10), and the air inlets (12) are communicated with the air inlet (11) in the side wall of the shell (10).

4. The air motor according to claim 1, characterized in that: the hollow rotating shaft (24) is connected with the shell (10) through a sealing bearing (30).

5. The air motor according to claim 1, characterized in that: at least one end face of the rotor (20) is provided with a choke plate (23).