CN112607001A

CN112607001A - Centrifugal stop rotating speed limiting device

Info

Publication number: CN112607001A
Application number: CN202011379026.3A
Authority: CN
Inventors: 周欣荣; 邵骁勇; 李俊; 肖卫华; 王吉军
Original assignee: Jiangsu Xinyang New Material Co ltd
Current assignee: Jiangsu Xinyang New Material Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-04-06

Abstract

The invention relates to a centrifugal stop rotating speed limiting device, which comprises an oil way I, an oil way II, an oil return way and a centrifugal distance-fixing mechanism for controlling the on-off of the oil way, wherein the centrifugal distance-fixing mechanism comprises a cover body, an elastic mechanism and a valve, the valve is arranged in the cover body in a sliding manner, the valve is provided with a fin, one end of the elastic mechanism is propped against the fin, the other end of the elastic mechanism is propped against the cover body, and a step for limiting the sliding stroke of the valve is arranged on the cover body along the sliding direction of the valve; and a first passage is formed in the valve, a second passage communicated with the oil return path is further formed in the valve, a first oil port is formed in the side wall of the cover body and communicated with the second passage, and the first oil path is communicated with the first oil port or the second oil path through the first passage. The invention has simple structure, utilizes the balance relation of centrifugal force and spring force to make the valve generate displacement, can limit the maximum rotating speed of the propeller and ensure the flight safety.

Description

Centrifugal stop rotating speed limiting device

Technical Field

The invention belongs to the technical field of spaceflight, and particularly relates to a centrifugal stopping rotating speed limiting device.

Background

Propellers are important components of aircraft and are devices that convert the rotational power of an engine into propulsive power. Therefore, during the flight of the airplane, the rotating speed of the propeller needs to be noticed, and the rotating speed of the propeller is not only related to the propelling force of the airplane, but also is closely related to the safety of the airplane.

In order to ensure the flight safety of the propeller aircraft, the rotating speed of the propeller cannot exceed the allowable rotating speed.

Disclosure of Invention

The invention provides a device for controlling the rotating speed of a propeller of an airplane, and provides a centrifugal stop rotating speed limiting device which comprises a first oil way, a second oil way, an oil return way and a centrifugal distance mechanism for controlling the on-off of the oil way, wherein the centrifugal distance mechanism comprises a cover body, an elastic mechanism and a valve, the valve is arranged in the cover body in a sliding manner, a fin is arranged on the valve, one end of the elastic mechanism abuts against the fin, the other end of the elastic mechanism abuts against the cover body, and a step for limiting the sliding stroke of the valve is arranged on the cover body along the sliding direction of the valve; and a first passage is formed in the valve, a second passage communicated with the oil return path is further formed in the valve, a first oil port is formed in the side wall of the cover body and communicated with the second passage, and the first oil path is communicated with the first oil port or the second oil path through the first passage.

Preferably, an adjusting washer is further disposed between the elastic mechanism and the cover body. The adjusting washer is selected to have a suitable thickness and can be used to adjust the pressure of the spring mechanism to accommodate the centrifugal force generated by the rotation of the propeller.

Further, the cover body comprises a cover cap and a bushing, the cover cap is fixed on the bushing, one end of the bushing is provided with a step used for abutting against the fin, and one end of the cover cap, far away from the bushing, is provided with a step used for abutting against the valve. The step on the cover cap is pressed against the upper end of the valve, and the step on the bush is pressed against the fin of the valve, so that the sliding stroke of the valve is limited.

Preferably, the first oil port is arranged on the inner wall of the lining, the valve is provided with a second oil port, and the first oil port is communicated with the second passage through the second oil port.

Further, the elastic mechanism is a spring.

Has the advantages that: the invention has simple structure, utilizes the balance relation of centrifugal force and spring force to make the valve generate displacement, can limit the maximum rotating speed of the propeller and ensure the flight safety.

Drawings

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

in the figure: 1. an adjusting washer; 2. a cover body; 3. a spring; 4. a cover; 5. a shutter; 6. an oil way I; 7. a bushing; 8. an oil path II; 9. a second channel; 10. an oil return path; 11. a first channel; 12. a first oil port; 13. a second oil port; 14. a fin; 15. and (4) a step.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "top", "bottom", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

Example 1

A centrifugal stop speed limiter is composed of oil channel I6, oil channel II 8, oil returning channel 10 and centrifugal distance-setting mechanism for controlling the on-off of oil channel

The centrifugal distance-fixing mechanism comprises a cover body 2, a spring 3 and a valve 5, wherein the valve 5 is arranged in the cover body 2 in a sliding mode, a fin 14 is arranged on the valve 5, one end of the spring 3 is fixed on the fin 14, the other end of the spring abuts against the inside of the cover body 2, and a step 15 for limiting the sliding stroke of the valve 5 is arranged on the cover body 2 along the sliding direction of the valve 5; and a first passage 11 is formed in the valve 5, a second passage 9 communicated with the oil return path 10 is further formed in the valve 5, a first oil port 12 is formed in the side wall of the cover body 2, the first oil port 12 is communicated with the second passage 9, and the first oil path 6 is communicated with the first oil port 12 or the second oil path 8 through the first passage 11.

An adjusting washer 1 is arranged between the spring 3 and the cover body 2. The adjusting washer 1 is chosen to have a suitable thickness and can be used to adjust the pressure of the spring 3 mechanism to the centrifugal force generated when the propeller is rotating.

The cover body 2 comprises a cover cap 4 and a bushing 7, the cover cap 4 is fixed on the bushing 7, one end of the bushing 7 is provided with a step 15 used for abutting against the fin 14, and one end, far away from the bushing 7, of the cover cap 4 is provided with a step 15 used for abutting against the valve 5. The step 15 of the cover 4 abuts on the upper end of the shutter 5 and the step 15 of the bush 7 abuts on the fin 14 of the shutter 5, so that the sliding stroke of the shutter 5 is limited.

The first oil port 12 is arranged on the inner wall of the lining 7, the second oil port 13 is formed in the valve 5, and the first oil port 12 is communicated with the second passage 9 through the second oil port 13.

The working principle is as follows: when the engine drives the propeller to rotate (the rotation center of the propeller is parallel to the axis of the first oil way 6), and the rotating speed of the propeller does not reach the corresponding rotating speed, the first oil way 6 is communicated with the second oil way 8 through the first channel 11; when the engine drives the propeller to rotate and the rotating speed of the propeller reaches the corresponding rotating speed, the engine drives the propeller to rotate to generate centrifugal force, the centrifugal force drives the valve 5 to extrude the spring 3, at the moment, the oil circuit I6 is communicated with the oil port I12 through the channel I11, the oil port I12 is communicated with the channel II 9 through the oil port II 13, the channel II 9 is communicated with the oil return circuit 10, the oil pressure of the oil circuit I6 is reduced, the large-distance oil cavity is sealed, and the paddle brakes.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A centrifugal stop rotational speed limiting device characterized by: comprises a first oil way (6), a second oil way (8), an oil return way (10) and a centrifugal distance-fixing mechanism for controlling the on-off of the oil ways, wherein

The centrifugal distance-fixing mechanism comprises a cover body (2), an elastic mechanism and a valve (5), wherein the valve (5) is arranged in the cover body (2) in a sliding mode, a fin (14) is arranged on the valve (5), one end of the elastic mechanism abuts against the fin (14), the other end of the elastic mechanism abuts against the interior of the cover body (2), and a step (15) for limiting the sliding stroke of the valve (5) is arranged on the cover body (2) along the sliding direction of the valve (5); and a first passage (11) is formed in the valve (5), a second passage (9) communicated with the oil return path (10) is further formed in the valve (5), a first oil port (12) is formed in the side wall of the cover body (2), the first oil port (12) is communicated with the second passage (9), and the first oil path (6) is communicated with the first oil port (12) or the second oil path (8) through the first passage (11).

2. A centrifugal stop rotational speed limiting device as defined in claim 1 wherein: an adjusting gasket (1) is arranged between the elastic mechanism and the cover body (2).

3. A centrifugal stop rotational speed limiting device as defined in claim 1 wherein: the cover body (2) comprises a cover cap (4) and a bushing (7), the cover cap (4) is fixed on the bushing (7), one end of the bushing (7) is provided with a step (15) used for supporting the fin (14), the cover cap (4) is far away from one end of the bushing (7) is provided with a step (15) used for supporting the valve (5).

4. A centrifugal stop rotational speed limiting device as defined in claim 3 wherein: the first oil port (12) is arranged on the inner wall of the lining (7), a second oil port (13) is formed in the valve (5), and the first oil port (12) is communicated with the second channel (9) through the second oil port (13).

5. A centrifugal stop rotational speed limiting device as defined in claim 1 wherein: the elastic mechanism is a spring (3).