CN218439543U

CN218439543U - Valve structure is followed to rotational speed

Info

Publication number: CN218439543U
Application number: CN202222242502.8U
Authority: CN
Inventors: 陈阳; 胡英杰
Original assignee: Hangyu Intelligent Control Hubei Technology Co ltd
Current assignee: Hangyu Intelligent Control Hubei Technology Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-02-03
Anticipated expiration: 2032-08-24

Abstract

The application relates to a valve structure is followed to rotational speed includes: the outer bushing is of a hollow pipe body structure, and a first oil inlet hole, a second oil inlet hole and a first oil outlet hole communicated with the second oil inlet hole are formed in the side wall of the outer bushing; the large valve is connected in the outer bushing in a sliding mode and divides the outer bushing into a first oil cavity communicated with the first oil inlet hole and a second oil cavity communicated with the second oil inlet hole; the eccentric cam is positioned at one end of the large valve and is abutted against the large valve, and the eccentric cam drives the large valve to slide to adjust the flow area of the first oil outlet; and one end of the large valve, which is far away from the eccentric cam, is provided with an inner oil cavity in sliding connection with the small valve, the small valve pushes the large valve to move towards the eccentric cam, and the inner oil cavity is communicated with the second oil cavity. This application forms pressure differential through interior oil pocket and first oil pocket, makes the little valve top push big valve top lean on eccentric cam, realizes adjusting the area of overflowing of first oil outlet.

Description

Valve structure is followed to rotational speed

Technical Field

The application relates to the technical field of hydraulic control servo valves, in particular to a rotating speed following valve structure.

Background

A rotating speed following valve structure in an aircraft engine fuel control system is an important component of an aircraft engine fuel regulator, and generally comprises an outer bushing and a large valve, wherein an oil inlet hole and an oil outlet hole are formed in the outer bushing, and the opening degree and the closing degree between the outer bushing and the large valve influence the automatic regulation of the rotating speed of an engine.

In the related technology, the rotating speed following valve structure is electrically controlled or mechanically controlled, and the electrically controlled or mechanically controlled rotating speed following valve structure is complex in structure, low in reliability and high in manufacturing cost, and cannot meet the use requirement of an aircraft engine fuel control system.

Disclosure of Invention

The embodiment of the application provides a valve structure is followed to rotational speed to solve the problem that the valve structure is followed to automatically controlled or mechanical control's rotational speed among the correlation technique complicated structure, the reliability is low, and manufacturing cost is high.

The embodiment of the application provides a valve structure is followed to rotational speed, includes:

the oil pump comprises an outer bushing, a first oil inlet, a second oil inlet and a first oil outlet, wherein the outer bushing is of a hollow pipe body structure, and the side wall of the outer bushing is provided with the first oil inlet, the second oil inlet and the first oil outlet communicated with the second oil inlet;

the large valve is connected in the outer bushing in a sliding mode and divides the outer bushing into a first oil cavity communicated with the first oil inlet hole and a second oil cavity communicated with the second oil inlet hole;

the eccentric cam is located at one end of the large valve and is abutted against the large valve, and the large valve is driven by the eccentric cam to slide to adjust the flow area of the first oil outlet.

And one end of the large valve, which is far away from the eccentric cam, is provided with an inner oil cavity which is connected with the small valve in a sliding manner, the small valve pushes the large valve to move towards the direction of the eccentric cam, and the inner oil cavity is communicated with the second oil cavity.

In some embodiments: and one end of the large valve close to the eccentric cam is in threaded connection with an adjusting screw, and the end part of the adjusting screw is provided with a steel ball in sliding connection with the eccentric cam.

In some embodiments: and one end of the outer bushing, which is far away from the eccentric cam, is provided with a bushing cover, and one end of the small valve is abutted to the bushing cover.

In some embodiments: a gasket is arranged between the bushing cover and the outer bushing, and the bushing cover, the gasket and the large valve jointly form the first oil cavity.

In some embodiments: the outer lining, the large valve, the lining cover and the small valve are all made of aluminum alloy materials.

In some embodiments: a first annular groove and a second annular groove are formed in the side wall of the large valve, the first annular groove and the outer bushing form the first oil cavity, and the second annular groove and the outer bushing form the second oil cavity.

In some embodiments: and a second oil outlet hole communicated with a second oil cavity is also formed in the side wall of the outer bushing.

In some embodiments: the cover is equipped with the shell on the outer liner, be connected through a plurality of sealing washer between shell and the outer liner, it is a plurality of the sealing washer separates first inlet port, second inlet port, first oil outlet and second oil outlet each other.

In some embodiments: one end of the big valve close to the eccentric cam is vertically connected with a cam rocker arm which pushes the big valve to slide towards the eccentric cam.

In some embodiments: the first oil outlet is a rectangular hole.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a rotating speed following valve structure, and the rotating speed following valve structure is provided with an outer bushing which is a hollow pipe body structure, and the side wall of the outer bushing is provided with a first oil inlet hole, a second oil inlet hole and a first oil outlet hole communicated with the second oil inlet hole; a large valve slidably connected within the outer liner and dividing the outer liner into a first oil chamber communicating with the first oil inlet and a second oil chamber communicating with the second oil inlet; the eccentric cam is located at one end of the large valve and is abutted to the large valve, and the large valve is driven by the eccentric cam to slide to adjust the flow area of the first oil outlet hole. An inner oil cavity connected with the small valve in a sliding mode is formed in one end, far away from the eccentric cam, of the small valve, the small valve pushes the large valve to move towards the eccentric cam, and the inner oil cavity is communicated with the second oil cavity.

Therefore, the valve structure is followed to rotational speed of this application has big valve in outer bush sliding connection, and big valve separates into the first oil pocket with first inlet port intercommunication with the outer bush to and the second oil pocket with second inlet port intercommunication. And low-pressure oil is output to the first oil inlet hole and the second oil inlet hole in a manual mode, and the large valve stops sliding along with the eccentric cam. And outputting low-pressure oil to the first oil inlet hole and high-pressure oil to the second oil inlet hole in an automatic mode, wherein the high-pressure oil in the second oil cavity enters the inner oil cavity, so that the small valve pushes the large valve to abut against the eccentric cam, the large valve is pushed to slide to adjust the overflowing area of the first oil outlet hole when the eccentric cam rotates, and the eccentric cam controls the output oil pressure change of the large valve so as to minimize the power change of the engine when the mode is changed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Reference numerals:

1. a bushing cover; 2. a seal ring; 3. a gasket; 4. a small valve; 5. an eccentric cam; 6. an outer liner; 7. a large valve; 8. an internal thread; 9. adjusting the screw; 10. a steel ball; 11. a cam rocker arm; 12. a first oil inlet hole; 13. a second oil inlet hole; 14. a first oil outlet; 15. and a second oil outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.

The embodiment of the application provides a valve structure is followed to rotational speed, and it can solve automatically controlled or mechanical control's among the correlation technique problem that the structure of valve structure is followed to rotational speed is complicated, and the reliability is low, and manufacturing cost is high.

Referring to fig. 1, an embodiment of the present application provides a rotation speed following shutter structure, including:

the outer bushing 6 is of a hollow pipe body structure, and a first oil inlet hole 12, a second oil inlet hole 13 and a first oil outlet hole 14 communicated with the second oil inlet hole 13 are formed in the side wall of the outer bushing 6. The aperture size, the middle size and the number of the first oil inlet hole 12, the second oil inlet hole 13 and the first oil outlet hole 14 can be specifically set according to the flow demand.

And a large valve 7, the large valve 7 being slidably coupled within the outer liner 6 and dividing the outer liner 6 into a first oil chamber communicating with the first oil inlet hole 12 and a second oil chamber communicating with the second oil inlet hole 13. And when the second oil cavity is filled with high-pressure oil, the high-pressure oil enters the inner oil cavity so that the small valve 4 pushes the large valve 7 to move towards the direction of the eccentric cam 5.

And the eccentric cam 5 is positioned at one end of the large valve 7, is abutted against the large valve 7, and drives the large valve 7 to slide by rotating and eccentric motion through the eccentric cam 5 so as to adjust the flow area of the first oil outlet hole 14. After the large valve 7 abuts against the eccentric cam 5, the change of the radius of the contact point of the large valve 7 and the eccentric cam 5 changes the opening degree of the first oil outlet hole 14, and the first oil outlet hole 14 is limited but not limited to a rectangular hole, so that the flow area of the first oil outlet hole 14 is linearly changed.

And one end of the large valve 7, which is far away from the eccentric cam 5, is provided with an inner oil cavity in sliding connection with the small valve 4, the small valve 4 is used for pushing the large valve 7 to move towards the eccentric cam 5, and the inner oil cavity is communicated with the second oil cavity. When high-pressure oil is filled in the second oil cavity, the high-pressure oil enters the inner oil cavity to enable the small valve 4 to push the large valve 7 to move towards the direction of the eccentric cam 5.

The valve structure is followed to rotational speed of this application embodiment has big valve 7 in outer bush 6 sliding connection, and big valve 7 separates into the first oil pocket with first inlet port 12 intercommunication with outer bush 6 to and the second oil pocket with second inlet port 13 intercommunication. And in the manual mode, low-pressure oil is output to the first oil inlet hole 12, low-pressure oil is output to the second oil inlet hole 13, and the large valve 7 stops sliding along the eccentric cam 5.

And in the automatic mode, low-pressure oil is output to the first oil inlet hole 12, high-pressure oil is output to the second oil inlet hole 13, high-pressure oil in the second oil cavity enters the inner oil cavity, and the pressure of the inner oil cavity is greater than that of the first oil cavity. The pressure difference is formed between the inner oil cavity and the first oil cavity, so that the small valve 4 pushes the large valve 7 to abut against the eccentric cam 5, the large valve 7 is pushed to slide when the eccentric cam 5 rotates to adjust the overflowing area of the first oil outlet hole 14, and the eccentric cam 5 controls the output oil pressure change of the large valve 7, so that the power change of the engine is minimized when the mode is changed.

In some alternative embodiments: referring to fig. 1, the embodiment of the present application provides a rotation speed following valve structure, an end of a large valve 7 of the rotation speed following valve structure, which is close to an eccentric cam 5, is in threaded connection with an adjusting screw 9, and a steel ball 10 in sliding connection with the eccentric cam 5 is arranged at an end of the adjusting screw 9. An internal thread 8 which is in threaded connection with an adjusting screw 9 is arranged at the end part of the large valve 7, and the extending length of the adjusting screw 9 can be changed by rotating the adjusting screw 9. The steel ball 10 and the eccentric cam 5 are preferably, but not limited to, hard alloy steel to improve the service life of the steel ball 10 and the eccentric cam 5.

The bushing cover 1 is provided at one end of the outer bushing 6 remote from the eccentric cam 5, and one end of the small shutter 4 abuts against the bushing cover 1. A gasket 3 is arranged between the bushing cover 1 and the outer bushing 6, and the bushing cover 1, the gasket 3, the outer bushing 6 and the large valve 7 form a first oil chamber together. The outer lining 6, the large valve 7, the lining cover 1 and the small valve 4 are all made of aluminum alloy materials so as to reduce the overall weight. One end of the small valve 4 is abutted against the outer bushing 6, when high-pressure oil enters the inner oil cavity, the small valve 4 pushes the outer bushing 6 to move leftwards, and the high-pressure oil in the inner oil cavity pushes the large valve 7 to move towards the direction of the eccentric cam 5, so that the eccentric cam 5 is kept in contact with the steel ball 10.

In some alternative embodiments: referring to fig. 1, in the present embodiment, a first annular groove and a second annular groove are formed in a side wall of a large valve 7 of the rotational speed following valve structure, the first annular groove and an outer bushing 6 form a first oil chamber, and the second annular groove and the outer bushing 6 form a second oil chamber. And a second oil outlet hole 15 communicated with the second oil cavity is also formed in the side wall of the outer bushing 6, and the second oil outlet hole 15 is used for normally opening a nozzle cavity of the servo valve.

The outer bushing 6 is sleeved with a shell (not shown in the figure), the shell is connected with the outer bushing 6 through a plurality of sealing rings 2, and the first oil inlet hole 12, the second oil inlet hole 13, the first oil outlet hole 14 and the second oil outlet hole 15 are mutually separated through the plurality of sealing rings 2. A cam rocker arm 11 for pushing the large valve 7 to slide towards the eccentric cam 5 is vertically connected to one end of the large valve 7 close to the eccentric cam 5, and the cam rocker arm 11 is connected with other external structures to push the large valve 7 to slide towards the eccentric cam 5.

Principle of operation

The embodiment of the application provides a rotating speed following valve structure, and as the rotating speed following valve structure is provided with an outer lining 6, the outer lining 6 is a hollow pipe body structure, and the side wall of the outer lining 6 is provided with a first oil inlet hole 12, a second oil inlet hole 13 and a first oil outlet hole 14 communicated with the second oil inlet hole 13; a large valve 7, the large valve 7 being slidably connected inside the outer liner 6 and dividing the outer liner 6 into a first oil chamber communicating with the first oil inlet hole 12 and a second oil chamber communicating with the second oil inlet hole 13; and the eccentric cam 5 is positioned at one end of the large valve 7, abuts against the large valve 7, and drives the large valve 7 to slide by the eccentric cam 5 so as to adjust the flow area of the first oil outlet hole 14. An inner oil cavity connected with the small valve 4 in a sliding mode is formed in one end, far away from the eccentric cam 5, of the small valve 4 and the large valve 7, the small valve 4 pushes the large valve 7 to move towards the eccentric cam 5, and the inner oil cavity is communicated with the second oil cavity.

Therefore, the rotating speed following valve structure is connected with the large valve 7 in the outer bushing 6 in a sliding mode, the large valve 7 divides the outer bushing 6 into a first oil cavity communicated with the first oil inlet hole and a second oil cavity communicated with the second oil inlet hole. And outputting low-pressure oil to the first oil inlet hole and outputting low-pressure oil to the second oil inlet hole in a manual mode, and stopping the large valve 7 from sliding along the eccentric cam 5. In the automatic mode, low-pressure oil is output to the first oil inlet hole 12, high-pressure oil is output to the second oil inlet hole 13, high-pressure oil in the second oil cavity enters the inner oil cavity, the small valve 4 pushes the large valve 7 to abut against the eccentric cam 5, the large valve 7 is pushed to slide when the eccentric cam 5 rotates to adjust the overflowing area of the first oil outlet hole 14, and the eccentric cam 5 controls the output oil pressure change of the large valve 7 so as to minimize the power change of the engine when the mode is changed.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in this application, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotational speed following shutter structure, comprising:

the oil pump comprises an outer bushing (6), wherein the outer bushing (6) is of a hollow pipe body structure, and the side wall of the outer bushing (6) is provided with a first oil inlet hole (12), a second oil inlet hole (13) and a first oil outlet hole (14) communicated with the second oil inlet hole (13);

the large valve (7) is connected in the outer bushing (6) in a sliding mode, and divides the outer bushing (6) into a first oil cavity communicated with the first oil inlet hole (12) and a second oil cavity communicated with the second oil inlet hole (13);

the eccentric cam (5) is located at one end of the large valve (7) and is abutted against the large valve (7), and the eccentric cam (5) drives the large valve (7) to slide to adjust the flow area of the first oil outlet hole (14);

the valve comprises a small valve (4), one end, far away from an eccentric cam (5), of a large valve (7) is provided with an inner oil cavity which is connected with the small valve (4) in a sliding mode, the small valve (4) pushes the large valve (7) to move towards the eccentric cam (5), and the inner oil cavity is communicated with a second oil cavity.

2. A speed follower shutter construction as claimed in claim 1, wherein:

one end of the large valve (7) close to the eccentric cam (5) is in threaded connection with an adjusting screw (9), and a steel ball (10) in sliding connection with the eccentric cam (5) is arranged at the end of the adjusting screw (9).

3. A speed follower shutter construction as claimed in claim 1, wherein:

the one end that eccentric cam (5) were kept away from in outer bush (6) is equipped with bush lid (1), the one end and bush lid (1) butt of little valve (4).

4. A speed follower shutter construction as claimed in claim 3, wherein:

a gasket (3) is arranged between the bushing cover and the outer bushing, and the bushing cover (1), the gasket (3), the outer bushing (6) and the large valve (7) jointly form the first oil cavity.

5. A rotation speed follower shutter structure according to claim 4, wherein:

the outer lining (6), the large valve (7), the lining cover (1) and the small valve (4) are all made of aluminum alloy materials.

6. A speed follower shutter construction as claimed in claim 1, wherein:

a first annular groove and a second annular groove are formed in the side wall of the large valve (7), the first annular groove and the outer bushing (6) form the first oil cavity, and the second annular groove and the outer bushing (6) form the second oil cavity.

7. A rotation speed follower shutter structure according to claim 1, wherein:

and a second oil outlet hole (15) communicated with a second oil cavity is also formed in the side wall of the outer bushing (6).

8. A speed follower shutter construction as claimed in claim 7, wherein:

the cover is equipped with the shell on outer bush (6), be connected through a plurality of sealing washer (2) between shell and outer bush (6), it is a plurality of sealing washer (2) separate first inlet port (12), second inlet port (13), first oil outlet (14) and second oil outlet (15) each other.

9. A speed follower shutter construction as claimed in claim 1, wherein:

one end of the big valve (7) close to the eccentric cam (5) is vertically connected with a cam rocker arm (11) which pushes the big valve (7) to slide towards the direction of the eccentric cam (5).

10. A speed follower shutter construction as claimed in claim 1, wherein:

the first oil outlet hole (14) is a rectangular hole.