Turbine motor for pneumatic tools
A turbine motor for a pneumatic tool, comprising a casing, a rotor and an axis. Compressed air enters the casing through an inlet and is directed towards blades of the rotor in a radial direction, so that torque is exerted on the axis. The blades of the rotors are to a large part hit by compressed air, each for an extended time, so that high effectivity and good efficiency result, allowing for operation at high speed and under high load.
The present invention relates to a turbine motor for a pneumatic tool, particularly to a turbine motor which transforms pneumatic energy of air at high pressure into rotational energy, combining high power output of pneumatic tools and high efficiency with simple structure and compact design.
DESCRIPTION OF RELATED ARTPneumatic tools like air levers generally are driven by turbines that transform pneumatic energy of air at high pressure into rotational energy.
A turbine motor for an air lever with a regulating device, as shown in
Referring to
A conventional turbine motor for pneumatic tools, as described above, has an arrangement of the rotor and the flow grooves that makes it complicated to regulate airflow. Furthermore, air of high pressure entering the rotor from a perpendicular direction hits rotor blades at a certain angle, causing high material stress and reduced efficiency, therefore not allowing for operation under high load and at high speed.
Considering the shortcomings of conventional art, the present inventor has designed a turbine motor which, following physical laws of conservation of angular momentum and gas dynamics, offers higher effectivity, better efficiency and a simplified passage of air.
SUMMARY OF THE INVENTIONIt is the object of the present invention to provide a turbine motor for a pneumatic tool having a rotor hit by air in a radial direction, thus achieving high effectivity, good efficiency and a compact design.
The present invention can be more fully understood by reference to the following description and accompanying drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in
Operation of the turbine motor for a pneumatic tool of the present invention is as follows: Compressed air enters the chamber 11 through the inlet 12, flows towards the axis body of the axis 20 and hits the rotor blades 21, exerting torque on the axis 30. Since the direction of air flow leaves the rotor blades 21 of the rotor 20 exposed longer and more effective as compared to conventional art, higher output power and better efficiency are attained, making the present invention suitable for high speed and high load.
Referring to
Referring to
Referring to
Furthermore, a multiple bearing 50 carries the axis 30, so that the axis 30 and the rotor 20 are disposed within the shield 60, without friction between the axis 30 and the shield 60 being generated, so that no power is wasted.
As shown in
As above explanation shows, the present invention, as compared to conventional art, has the following effects:
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- 1. By guiding incoming compressed air onto the rotor blades in directions of rotation and having air hit the rotor blades at high speed, the rotor blades are exposed to compressed air for long time intervals and to a large part. In conventional art, rotor blades are hit by compressed air in a perpendicular direction, being exposed shorter times and to a minor part, so that a lower power output and lower speed than in the present invention are achieved.
- 2. By employing a stator with a variable angular position, the present invention allows to vary the direction of airflow, controlling forward and reverse directions of the rotational movement within a simple structure. Conventional art requires a penetrating, complicated structural part for controlling forward and reverse directions of the rotational movement.
- 3. The present invention has an air whirling device, directing compressed air to hit all of the rotor blades simultaneously, greatly increasing effectivity. Conventional art allows compressed air only to hit one rotor blade in a given time unit, obviously resulting in lower effectivity than the present invention.
- 4. Higher output power and greater effectivity make the present invention suitable for high speed and high load.
While the invention has been described with reference to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention which is defined by the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Claims
1. A turbine motor for a pneumatic tool, comprising:
- a casing, surrounding a chamber, with an air inlet and an air outlet being attached to said casing;
- a rotor, disposed inside said chamber, performing a rotational movement driven by compressed air from said air inlet; and
- an axis, carrying said rotor, having a rear end borne by said casing and a front end passing through said casing, from which torque is taken.
2. The turbine motor for a pneumatic tool according to claim 1, wherein a stator is inserted between said rotor and an inner wall of said casing.
3. The turbine motor for a pneumatic tool according to claim 2, wherein said stator has a plurality of stator blades.
4. The turbine motor for a pneumatic tool according to claim 2, wherein said stator is radially oriented and placed opposite said air inlet.
5. The turbine motor for a pneumatic tool according to claim 3, wherein said stator is radially oriented and placed opposite said air inlet.
6. The turbine motor for a pneumatic tool according to claim 2, wherein an air whirling device surrounds said stator.
7. The turbine motor for a pneumatic tool according to claim 1, wherein in said chamber a shield and an outlet passageway are placed along airflow towards said stator.
8. The turbine motor for a pneumatic tool according to claim 1, wherein said axis has a plurality of bearings, so that said axis and said rotor are borne inside said shield of said rotor.
9. The turbine motor for a pneumatic tool according to claim 7, wherein said axis has a plurality of bearings, so that said axis and said rotor are borne inside said shield of said rotor.
10. A turbine motor for a pneumatic tool, comprising:
- a casing, surrounding a chamber, with an air inlet and an air outlet air being attached to said casing;
- a rotor, disposed inside said chamber, performing a rotational movement driven by compressed air from said air inlet;
- an axis, carrying said rotor, having a rear end borne by said casing and a front end passing through said casing, from which torque is taken;
- a rear casing, placed at a rear end of said casing, closely surrounding said rotor and blades thereof; and
- an air direction adjusting knob, placed close to said air inlet and allowing, by an axial or an angular movement, to switch directing of incoming compressed air onto said rotor between forward and reverse directions.
11. The turbine motor for a pneumatic tool according to claim 10, wherein a valve is installed at said air inlet, allowing to switch incoming airflow on and off.
12. The turbine motor for a pneumatic tool according to claim 3, wherein said plurality of stator blades have adjustable orientations.
13. The turbine motor for a pneumatic tool according to claim 3, wherein said plurality of stator blades are turnably set on a plurality of blade supports.
14. The turbine motor for a pneumatic tool according to claim 12, wherein said plurality of stator blades are turnably set on a plurality of blade supports.
Type: Application
Filed: Apr 21, 2004
Publication Date: Jul 14, 2005
Inventors: Chii-Ron Kuo (Hsinchu), Jia-Ruey Wu (Hsinchu), Chia-Yang Chang (Taipei), Ta-Wei Wang (Penchiao City), Jung-Huang Liao (Hsinchu)
Application Number: 10/829,586