CN217276781U

CN217276781U - Rotor experiment table with combined support and connected center pull rod and end teeth

Info

Publication number: CN217276781U
Application number: CN202221242333.1U
Authority: CN
Inventors: 夏明波; 王艾伦; 尹伊君; 张伟
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-08-23
Anticipated expiration: 2032-05-23

Abstract

The utility model provides a rotor experiment table that central pull rod-end tooth that contains combination supporting is connected, include: a bench base; the two vibration measurement brackets are arranged on the experiment table base and are arranged at intervals; the combined bearings are respectively arranged on the vibration measurement brackets and consist of an extruded oil film damper and a rolling bearing; the first central rotating shaft and the second central rotating shaft are respectively inserted into the two combined supports, and the first central rotating shaft is connected with a motor through a coupler; rotor system is connected with first central pivot and second center pivot, and central pivot adopts collet chuck to be connected with the sleeve in this application, has the concentricity height, and the advantage of easily installing and dismantling can survey the rotor dynamics characteristic under the different pretightning forces size through the fastening force of adjusting sleeve screw thread section.

Description

Rotor experiment table with combined support and connected central pull rod and end teeth

Technical Field

The utility model relates to a rotor system dynamics, in particular to rotor experiment table that center pull rod-end tooth that contains combination support is connected.

Background

Aircraft engines are the power source of aircraft and are the most important components of aircraft. It is praised as an industrial pearl, and embodies a national comprehensive industrial capability. The vibration of the aircraft engine affects the overall performance and service life, and the core mechanism causing the vibration of the aircraft engine is the rotor system. The design of the support system is an important component of the design of the rotor system.

The arc end tooth connecting structure is an important connecting structure of the aero-engine, and has great engineering value for researching the influence of the arc end tooth connecting structure on the dynamic characteristics of a rotor system. Generally, the test research directly carried out on the prototype rotor of the aero-engine has high cost and high risk, so that the research is carried out on a dynamic simulation test bed. However, the structure of the aero-engine is very complex, and the design of a dynamic similarity test model of the aero-engine is always a big problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rotor experiment table that central pull rod-end tooth that contains combination supporting is connected, its purpose is in order to solve the problem among the prior art.

In order to achieve the above object, an embodiment of the present invention provides a rotor experiment table with a center rod-end tooth connection of a combined support, including:

a bench base;

the two vibration measurement brackets are arranged on the experiment table base and are arranged at intervals;

the combined bearings are respectively arranged on the vibration measurement brackets and consist of an extruded oil film damper and a rolling bearing;

the first central rotating shaft and the second central rotating shaft are respectively inserted into the two combined supports, and the first central rotating shaft is connected with a motor through a coupler;

and the rotor system is connected with the first central rotating shaft and the second central rotating shaft.

Preferably, the rotor system comprises a sleeve, a wheel disc on the sleeve and a thread pair on the sleeve, one end of the sleeve is positioned by a shaft shoulder, the other end of the sleeve is fastened by the thread pair, and the wheel disc is fixed on the sleeve and located between the shaft shoulder and the thread pair.

Preferably, the sleeve is connected with the first central rotating shaft and the second central rotating shaft in a clamping mode through spring chucks.

Preferably, the rotor system has two end tooth connecting structures, which are respectively located between the AB and the BC.

The above technical scheme of the utility model has following beneficial effect:

the dynamic characteristics of the rotor piece under different pretightening forces can be measured according to experimental requirements. The central rotating shaft is connected with the sleeve by adopting a spring chuck, and has the advantages of high concentricity and easy installation and disassembly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the connection of the rotor system to the first central rotating shaft and the second central rotating shaft.

The method comprises the following steps of 1-an experiment table base, 2-a vibration measurement bracket, 3-a combined support, 4-a first central rotating shaft, 5-a second central rotating shaft, 6-a rotor system, 61-a sleeve, 62-a shaft shoulder, 63-a wheel disc, 64-a thread pair fastening, 7-a spring chuck and 8-a motor.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model provides a rotor experiment table that central pull rod-end tooth that contains combination supporting is connected to current problem.

As shown in fig. 1 and 2, embodiments of the present invention provide a rotor experiment table with a center rod-end tooth connection of a combined bearing, comprising: a laboratory bench base 1; the two vibration measurement brackets 2 are arranged on the experiment table base 1, and the two vibration measurement brackets 2 are arranged at intervals; the combined supports 3 are respectively arranged on the vibration measurement support 2, and each combined support 3 consists of an extruded oil film damper and a rolling bearing; the first central rotating shaft 4 and the second central rotating shaft 5 are respectively inserted into the two combined supports 3, and the first central rotating shaft 4 is connected with a motor 8 through a coupler; and the rotor system 6 is connected with the first central rotating shaft 4 and the second central rotating shaft 5.

The rotor system 6 comprises a sleeve 61 and a wheel disc 63 arranged on the sleeve 61, the sleeve 61 is divided into a thread pair and a sleeve shaft section, one end of the sleeve 61 protrudes to form a shaft shoulder 62 for positioning, the other end of the sleeve 61 forms a thread pair fastening 64 to be matched with the thread pair, the wheel disc 63 is arranged between the shaft shoulder 62 and the thread pair fastening 64, and the wheel disc 63 is fixed on the sleeve 61. Preferably, the thread pair is spaced from shoulder 62 for mounting disk 63.

The discs 63 are fitted with end teeth, and in the present application three discs 63 were tested, the end teeth being located between 63-a and 63-B, 63-B and 63-C.

The rotor system 6 is assembled with a plurality of end-tooth containing discs 63 in the form of a central tie-rod-thread connection. By adjusting the fastening force of the thread pair part of the sleeve 61, the end-containing gear disc 63 combined rotor experimental part under different pretightening forces can be obtained.

The collet chuck 7 connects the sleeve 62 of the rotor system 6, the first central rotating shaft 4 and the second central rotating shaft 5.

The rotor experiment table with the combined support and the central pull rod-end tooth connection further comprises an information collection module and an information operation module (not shown in the figure), wherein the information collection module is in signal connection with the information operation module, the information collection module is in signal connection with an acceleration sensor and a stress sensor, the stress sensor is installed on the first central rotating shaft 4 and/or the second central rotating shaft 5, and the acceleration sensor is installed on the rotor system 6.

In this application, adopted the end tooth to connect, can explore the dynamics of the rotor that contains the end tooth structure to add the squeeze film damper, can effectively reduce vibration, squeeze film damper simple to operate simultaneously can be according to the experiment needs, and the adjustment is changed and is made up supporting 3. The dynamic characteristics of the rotor system 6 under different thread fastening pretightening forces can be measured according to experimental requirements. The two central rotating shafts are connected with the sleeve 61 by the spring chuck 7, and the two central rotating shafts have the advantages of high concentricity and easy installation and disassembly.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A rotor experiment table with a combined supported center pull rod-end tooth connection is characterized by comprising:

a bench base (1);

the two vibration measurement brackets (2) are arranged on the experiment table base (1), and the two vibration measurement brackets (2) are arranged at intervals;

the combined supports (3) are respectively arranged on the vibration measurement support (2), and each combined support (3) consists of an extruded oil film damper and a rolling bearing;

the first central rotating shaft (4) and the second central rotating shaft (5) are respectively inserted into the two combined supports (3), and the first central rotating shaft (4) is connected with a motor (8) through a coupler;

and the rotor system (6) is connected with the first central rotating shaft (4) and the second central rotating shaft (5).

2. The rotor test bench with combined supported center tie-rod-end-tooth connection of claim 1, characterized in that: the rotor system (6) comprises a sleeve (61), a wheel disc (63) on the sleeve (61) and a thread pair on the sleeve (61), wherein one end of the sleeve (61) is positioned by a shaft shoulder (62), the other end of the sleeve (61) is provided with a thread pair fastener (64), and the wheel disc (63) is fixed on the sleeve (61) and is positioned between the shaft shoulder (62) and the thread pair fastener (64).

3. The rotor test bench with combined supported center tie-bar-end-tooth connection of claim 2, wherein: the sleeve (61) is connected with the first central rotating shaft (4) and the second central rotating shaft (5) in a clamping mode through a spring chuck (7).

4. The rotor test bench with combined supported center tie-bar-end-tooth connection of claim 2, wherein: the rotor system (6) is provided with two end tooth connecting structures which are respectively positioned between 63-A and 63-B and between 63-B and 63-C.