CN201003414Y

CN201003414Y - Pneumatic motor

Info

Publication number: CN201003414Y
Application number: CNU2007201054038U
Authority: CN
Inventors: 徐忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-08
Filing date: 2007-01-08
Publication date: 2008-01-09
Anticipated expiration: 2017-01-08

Abstract

The utility model discloses a vane type pneumatic motor for driving small scale rotating tools, which mainly comprises a stator, a rotor, end closures enclosing the two ends of the stator, vanes radially movable along the rotor arranged on the rotor through the vane grooves, and an air incoming passage and an air outgoing passage communicated with the internal cavity of the stator arranged on the end closure. A rotatable inner wall is arranged for the stator; the rotor is eccentrically arranged inside the internal cavity of the stator; the side surface of the rotor is in a tangency with the inner surface of the rotatable inner wall. Due to the rotional inner wall arranged on the stator regarding the utility model, the friction between the rotor and the stator is efficiently buffered and reduced, solving the problem of loud noise of the prior art, at the same time reducing the resistance to the rotor caused by the stator, reducing energy consumption, improving working efficiency of the pneumatic motor.

Description

A kind of pneumatic motor

Technical field

The utility model relates to a kind of dynamic power machine, specifically a kind of pneumatic vane motor.Be mainly used in and drive small-sized turning tool, as cyclostrophic, pneumatic grinder etc.

Background technique

Pneumatic motor is a kind of of dynamic power machine, mainly comprises two kinds of piston type and blade types, and pneumatic vane motor is to promote blade and drive a kind of pneumatic motor of rotor rotation by pressurized gas.On its structure, generally comprise stator, rotor, some blades, shutoff at the end cap at stator two ends, be arranged on the gas-entered passageway and the outlet passageway that are communicated with its inner chamber on the stator.Described rotor eccentricity is arranged in the bore of stator, and side surface and stator inner surface are tangent, and the one end is provided with the output shaft that stretches out end cap.The suction port of the inner of described gas-entered passageway is arranged on the surperficial tangent position mutually of adjacent stator and rotor on the stator sidewall.Described outlet passageway operated by rotary motion on the stator sidewall apart from the rotor farthest.Described blade pass is crossed blade groove and is located on the stator, can move radially along stator.Described blade is can be by ad hoc thrustor extrapolated and press closer on stator inner wall.Also have plenty of the gas of employing and promote to realize this function.During work, gas enters facing mutually in the space that two blades are divided into of suction port from gas-entered passageway, and gas pressure promotes blade to the bigger direction rotation in gap.After turning over suction port at rear blade, next blade enters the working position, then finishes next time promoting at rear blade with this.Circulate successively, just realized the high speed rotating of rotor.The gas that enters bore of stator is treated after rear blade turns over the air outlet, is derived by outlet passageway.

In the pneumatic motor working procedure of said structure, promote blade in order to realize gas, blade edge need press closer on stator inner surface, and in a little the rotation, blade and stator inner surface can have bigger friction.Friction under changeing at a high speed on the one hand will bring very big noise.On the other hand, because the obstruction of friction, the working efficiency of motor also is subjected to influencing very much.And the friction component that make also cause damage, the working life of shortening machine.

Summary of the invention

To be solved in the utility model is existing pneumatic motor above shortcomings, and a kind of improved pneumatic motor is provided, and is intended to reduce the operational noise of pneumatic motor, increases its working life, improves its working efficiency.

The technological scheme that addresses the above problem employing is: a kind of pneumatic motor, comprise that stator, rotor, shutoff are at the end cap at stator two ends, be located at epitrochanterian blade, the air intake passage that is communicated with bore of stator and the air-out passage that can move along rotor radial by blade groove, described rotor eccentricity is arranged in the inner chamber of stator, it is characterized in that described stator is provided with a rotatable inwall, described rotor-side surface is tangent with described rotatable inwall internal surface, and described air intake passage and air-out passage all are provided with on the end cap.

Described rotatable inwall can be to be arranged on rotating cylinder on the stator body by bearing, and described bearing can adopt sliding bearing or roller bearing.It also can be the inner ring of bearing itself.Fit system between the Internal and external cycle of the similar sliding bearing of employing between described rotatable inwall and the stator body can also be added lubricant oil between the two.

Described air intake passage suction port should close on setting with the surperficial tangent line mutually of rotor and rotatable inwall, and axially goes up over against the crack between rotatable inwall and the rotor.

In the described blade groove any device can be set, described blade relies on the centripetal force in the work to realize and turns contacting of inwall, also can adopt general thrustor, as goring push spring etc.The guiding gutter to the blade groove air-supply that is communicated with air intake passage can also be set on described end cap, by the pressurized air that inputs to root of blade blade edge be pushed against and rotate on the inwall.

When adopting above-mentioned the third pushing tow mode, described guiding gutter can be designed to the circular arc concentric with rotor, and its starting point phase place is identical with the suction port phase place of gas-entered passageway, its corner equals to face mutually the angle of blade.Adopt this guiding gutter structure, only when being subjected to the high-pressure air promotion and starting working, its edge just can press closer on stator inner wall blade, and is then less with stator inner wall pressure in other phase place.So just, reduced the resistance of stator, can reduce energy loss to a certain extent rotor.

Because the utility model is provided with a rotatable inwall on stator body, when motor operations, this rotation inwall of friction effect at blade can rotate thereupon, therefore the quick-action difference between blade and the sleeve is much smaller with respect to the speed difference between blade in the prior art and the stator inner wall, even is zero.The noise that produces because of friction is very little so between the two, and has reduced the wearing and tearing of blade and stator, has increased its working life; In addition, adopt the bearing setting can all be similar to the linkage structure of bearing between inwall and the stator body because can change, stator will significantly reduce with respect to prior art the resistance of rotor, and then has reduced the energy loss of motor, has improved working efficiency.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of existing pneumatic motor.

Fig. 2 is that the A-A of Fig. 1 is to sectional drawing.

Fig. 3 is the structural representation of the utility model pneumatic motor.

Fig. 4 is that the B-B of Fig. 3 is to sectional drawing.

Fig. 5 is that the C-C of Fig. 3 is to sectional drawing.

Fig. 6 is the structural representation that rotatable inwall is installed by roller bearing.

Fig. 7 is the structural representation that rotatable inwall is installed by sliding bearing.

Fig. 8 is the structural representation that replaces rotatable inwall with roller bearing inner ring itself.

Embodiment

With reference to Fig. 1,2, pneumatic motor of the prior art comprise stator 2, rotor 3, some blades 6, shutoff at the end cap 1,4 at stator two ends, be arranged on the gas-entered passageway 7 and the outlet passageway 8 that are communicated with its inner chamber on the stator 2.Blade 6 described in this embodiment is an example with four.Described rotor 3 is eccentrically set in the stator 2, and side surface and stator 2 internal surfaces are tangent, and the one end is provided with the output shaft 5 that stretches out end cap.The suction port 15 of described gas-entered passageway 7 art ends is arranged on surperficial one side of tangent line mutually of stator 2 and rotor 3.The air outlet operated by rotary motion of described outlet passageway 8 on the stator sidewall apart from the rotor farthest.Described blade 6 is located on the rotor 2 by blade groove 10, can move along rotor radial.Described blade 6 is can be by ad hoc thrustor extrapolated and press closer on the inwall of stator 2.

With reference to Fig. 3,4,5, the utility model is improved to stator inner wall rotatable inwall 11 on the basis of existing technology.The mode that adopts similar sliding bearing Internal and external cycle to cooperate between described rotatable inwall 11 and stator 2 bodies cooperates.Between rotatable inwall 11 and stator 2 bodies, can add lubricant oil.The utility model all is located at gas-entered passageway 7 and outlet passageway 8 on the end cap 1 of a side.Position in end cap 1 corresponding blade groove 10 bottoms is provided with one section arc gas guide groove 12 that is communicated with gas-entered passageway 7.Its starting point phase place is identical with described suction port 15 phase places.Its corner is 90 degree, and is identical with the angle that faces mutually between the blade.

Fig. 6 is the another kind of mode of execution structural representation of the utility model.In this scheme, described rotatable inwall 11 is installed on the body of stator 2 by roller bearing 13.

Fig. 7 is the another kind of mode of execution structural representation of the utility model.In this scheme, described rotatable inwall 11 is installed on the body of stator 2 by sliding bearing 14.

Fig. 8 is the utility model replaces rotatable inwall with roller bearing inner ring itself an embodiment structural representation.

What should be understood that is: the foregoing description is just to explanation of the present utility model, rather than to restriction of the present utility model, any innovation and creation that do not exceed in the utility model connotation scope all fall within the protection domain of the present utility model.

Claims

1, a kind of pneumatic motor, comprise stator (2), rotor (3), shutoff is at the end cap (1 at stator (2) two ends, 4), be located at the epitrochanterian blade (6) that can move radially along rotor (3) by blade groove (10), the air intake passage (7) and the air-out passage (8) that are communicated with the inner chamber of stator (2), described rotor (3) is eccentrically set in the inner chamber of stator (2), it is characterized in that described stator is provided with a rotatable inwall (11), described rotor (3) side surface and described rotatable inwall (11) internal surface are tangent, and described air intake passage (7) and air-out passage (8) all are arranged on the end cap.

2, a kind of pneumatic motor according to claim 1 is characterized in that described rotatable inwall (11) is arranged on the body of stator (2) by bearing.

3, a kind of pneumatic motor according to claim 1 is characterized in that the inner ring of described rotatable inwall (11) for the bearing on the body that is arranged on stator (2).

4, a kind of pneumatic motor according to claim 1 is characterized in that adopting micro-gap to cooperate between the body of described rotatable inwall (11) and stator (2), adds lubricant oil in its gap.

5, according to each described a kind of pneumatic motor among the claim 1-4, it is characterized in that the terminal suction port (15) of described air intake passage (7) is arranged near the surperficial phase tangent line between described rotatable inwall (11) and the rotor (3), and axially over against crack (16) between rotatable inwall (11) and the rotor (3).

6, a kind of pneumatic motor according to claim 5 is characterized in that described blade (6) closes by pneumatic mode and described rotatable inwall (11) card, and described end cap (1) is provided with the guiding gutter (12) that is communicated with air intake passage (7) and blade groove (10).

7, a kind of pneumatic motor according to claim 6, it is characterized in that described guiding gutter (12) for and the concentric circular arc of rotor (3), the phase place that its starting point phase place and described suction port (15) are corresponding is identical, corner equals to face mutually the angle between the blade (6).

8, a kind of pneumatic motor according to claim 5 is characterized in that described blade (6) closes by goring push spring and described rotatable inwall (11) card that is arranged on blade groove (10) bottom.