CN111982518A

CN111982518A - Variable inertia engine transition disc

Info

Publication number: CN111982518A
Application number: CN202010789571.3A
Authority: CN
Inventors: 裴伟; 黄旭; 刘宇强; 马东元; 陈楠; 许伟利
Original assignee: China North Engine Research Institute Tianjin
Current assignee: China North Engine Research Institute Tianjin
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2020-11-24

Abstract

The invention provides a variable inertia engine transition disc which comprises a transition disc main body, an internal inertia disc, an external inertia disc and an inertia block, wherein the transition disc main body can be connected with a connecting structure of an engine flywheel disc and a coupling, and is also provided with a ring groove for embedding the internal inertia disc, and the ring groove is provided with an internal connecting hole; and an external connecting hole for connecting the external inertia disc and the inertia block is arranged at the outer side position of the annular groove of the transition disc main body. According to the invention, the inertia is changed by processing the inertia disc, the transition disc main body can be repeatedly utilized, the enterprise cost is saved, and the nonstandard utilization rate is improved. The invention improves the adjustment range of the rotational inertia of the transition disc and improves the non-standard application range by mutually combining and applying various means such as an internal inertia disc, an external inertia disc, an inertia block and the like.

Description

Variable inertia engine transition disc

Technical Field

The invention belongs to the technical field of engine test devices, and particularly relates to an inertia-variable engine transition disc.

Background

Before bench test on the engine, the torsional vibration calculation needs to be carried out on a test system consisting of the engine, the coupling and the dynamometer, the resonance point of the system is confirmed to be outside the test working condition of the engine, and the safety of the test process is ensured. Generally, once a system resonance point appears in an engine test working condition, a flywheel transition disc needs to be designed and processed, and the phenomenon is avoided. Generally, the transition disc is designed to be of an integral structure, namely, a single transition disc is only suitable for one type of test system, and once the test system is changed or calculated to be inconsistent with the actual test condition, the resonance point is still located in the test working condition of the engine, a new transition disc can only be machined again for testing. Due to the phenomenon, a plurality of independent transition discs need to be designed and processed in different test systems of series engines with the same flywheel size due to the requirement of rotational inertia, so that a series of problems of increasing the processing cost, improving the difficulty of lean management of a laboratory and the like are caused.

Disclosure of Invention

In view of this, the present invention provides a variable inertia engine transition disc, which improves the versatility and reduces the cost.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a variable inertia engine transition disc comprises a transition disc main body, an internal inertia disc, an external inertia disc and an inertia block, wherein the transition disc main body can be connected with a connecting structure of an engine flywheel disc and a coupling, the transition disc main body is also provided with a ring groove for embedding the internal inertia disc, and the ring groove is provided with an internal connecting hole; and an external connecting hole for connecting the external inertia disc and the inertia block is arranged at the outer side position of the annular groove of the transition disc main body.

Furthermore, the built-in transition disc carries out torsional vibration calculation according to the rotary inertia of the engine and the dynamometer to obtain the required weight, the thickness and the processing materials are reasonably designed according to the reserved depth of the ring groove of the main body of the transition disc, and the built-in transition disc is connected with the main body of the transition disc through the built-in connecting hole.

Furthermore, the transition disc main body is connected with an engine flywheel and a dynamometer coupling through bolt holes.

Compared with the prior art, the invention has the following advantages:

(1) according to the invention, the inertia is changed by processing the inertia disc, the transition disc main body can be repeatedly utilized, the enterprise cost is saved, and the nonstandard utilization rate is improved.

(2) The invention improves the adjustment range of the rotational inertia of the transition disc and improves the non-standard application range by mutually combining and applying various means such as an internal inertia disc, an external inertia disc, an inertia block and the like.

(3) The external inertia disc and the inertia block are extremely simple and convenient to install, time-saving and labor-saving, and are convenient for testing personnel to adjust in time according to actual conditions on site.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a built-in inertia disc and a transition disc body according to an embodiment of the present invention;

FIG. 2 is a schematic view of the external inertia disc and the transition disc main body according to the embodiment of the invention;

fig. 3 is a schematic application diagram of an inertia block according to an embodiment of the present invention.

Description of reference numerals:

1 is a transition disc main body, 2 is an internal inertia disc, 3 is an external inertia disc, and 4 is an inertia block.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

An inertia-variable engine transition disc comprises a transition disc main body (1), an internal inertia disc (2), an external inertia disc (3) and an inertia block (4),

the transition disc main body (1) can be connected with a connecting structure of an engine flywheel disc and a coupling, and the transition disc main body (1) is also provided with a ring groove for embedding the built-in inertia disc (2), and a built-in connecting hole is formed in the ring groove; the outer side of the ring groove of the transition disc main body (1) is provided with an external connecting hole for connecting the external inertia disc (3) and the inertia block (4).

As shown in fig. 1, the built-in inertia disc 2 is designed, selected and processed within an allowable depth range of the ring groove, and is connected to the transition disc main body 1 through a built-in connection hole. Namely, the built-in transition disc (2) can carry out torsional vibration calculation according to the rotary inertia of an engine and a dynamometer to obtain required weight, and the thickness and the processing materials are reasonably designed according to the reserved depth of the ring groove of the transition disc main body (1) to ensure that the transition disc main body (1) can be connected with the transition disc main body (1) through bolts.

In the practical application process, the external inertia disc (3) and the inertia block (4) can be used for adjusting the rotational inertia of the system. The external transition disc (3) and the inertia block (4) are reasonably matched and used according to actual tests and calculation under the condition that the maximum thickness of the internal transition disc (2) still does not meet the design requirements or the calculation result does not accord with the actual test condition and resonance occurs.

As shown in fig. 2, the problem that the internal inertia disk 2 cannot meet the inertia requirement of the transition disk can be solved by designing and processing the external inertia disk 3, and the external inertia disk 3 is connected with the transition disk main body 1 through an external connecting hole.

As shown in FIG. 3, the fine adjustment of the integral inertia of the transition disc can be realized by increasing or decreasing the inertia blocks 4, meanwhile, the installation is simple and convenient, the operation can be carried out under the condition of finishing the integral connection of the engine, and the timely adjustment of the inertia can be realized.

The transition disc main body (1) is connected with an engine flywheel and a dynamometer coupling through bolt holes.

During processing, the transition disc main body 1 is firstly suitable for the torsional vibration requirement of an engine and a main laboratory test system for testing the engine in design calculation. The structure comprises an installation space of the built-in inertia plate 2, a built-in connecting hole, an external inertia plate and an inertia block connecting hole besides necessary coupling and engine flywheel plate connecting holes.

During the test, after the test system is changed, the resonance point of the new test system is calculated again, and if the weight of the transition disc needs to be increased, the design and the processing of the built-in transition disc 2 can be carried out according to the reserved space of the transition disc main body 1 and the position of the mounting hole. Once the internal inertia disc 2 can not meet the requirement of a test system even in the selection of the limit thickness or after the resonance phenomenon occurs in the actual test process, the inertia can be adjusted by adding the external transition disc 3 and the inertia block 4 without integrally disassembling the transition disc, namely, the resonance point of the engine and the laboratory dynamometer is ensured to be out of the range of the test working condition of the engine through reasonable collocation and combination.

The flywheel type engine test system is suitable for the situation that the rotary inertia of different engines with the same flywheel size on the same stand or the rotary inertia of the same engine on different engine stands and other test systems changes.

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 variable inertia engine transition plate, comprising: comprises a transition disc main body (1), an internal inertia disc (2), an external inertia disc (3) and an inertia block (4),

the transition disc main body (1) can be connected with a connecting structure of an engine flywheel disc and a coupling, the transition disc main body (1) is also provided with a ring groove used for embedding the built-in inertia disc (2), and a built-in connecting hole is formed in the ring groove; an external connecting hole for connecting an external inertia disc (3) and an inertia block (4) is formed in the outer side position of the ring groove of the transition disc main body (1);

the built-in inertia disc (2) is connected with the transition disc main body (1) through built-in connecting holes, and the external inertia disc (3) and the inertia block (4) are connected with the transition disc main body (1) through external connecting holes in sequence.

2. A variable inertia engine transition plate as defined in claim 1, wherein: the built-in transition disc (2) carries out torsional vibration calculation according to the rotational inertia of an engine and a dynamometer to obtain the required weight, and the thickness and the processing materials are designed reasonably according to the reserved depth of the ring groove of the transition disc main body (1).

3. A variable inertia engine transition plate as defined in claim 1, wherein: the transition disc main body (1) is connected with an engine flywheel and a dynamometer coupling through bolt holes.