CN113758717A

CN113758717A - Combined type rigidity test support

Info

Publication number: CN113758717A
Application number: CN202111059270.6A
Authority: CN
Inventors: 邓旺群; 聂卫健; 陈亚农; 刘文魁
Original assignee: Hunan Aviation Powerplant Research Institute AECC
Current assignee: Hunan Aviation Powerplant Research Institute AECC
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2021-12-07

Abstract

The invention discloses a combined type rigidity test support which comprises a base and a combined base body, wherein the combined type rigidity test support is symmetrically distributed on the top of the base and is used for mounting a test bearing and is rotationally connected with an aircraft engine rotor through the test bearing; the overall structure of the invention is designed to increase two combined base bodies on the base, thereby realizing effective support of the rotor with shorter fulcrum span, further ensuring that the fulcrums with similar distances have effective supporting points, and further increasing the support rigidity of the structure. The experimental support passes through the cooperation of location panel the installation of fixing a position is carried out to the second constant head tank, cooperates T type spout and T type bolt to connect the fastening simultaneously, and the dismouting is convenient.

Description

Combined type rigidity test support

Technical Field

The invention belongs to the technical field of aeroengine rotors, and particularly relates to a combined type rigidity test support.

Background

The development of modern small and medium-sized aircraft engines hopes to obtain higher engine performance, and meanwhile, lighter-weight rotor and stator parts are adopted. One important measure for achieving the purpose is to improve the rotating speed of the aircraft engine, so that the rotors of the small and medium-sized aircraft engines are developed towards the direction of larger and more flexible length-diameter ratio, the structure is increasingly complex, high-rotating-speed and high-strain-energy flexible rotors are generally adopted, and a plurality of rotors work above first-order, second-order and even third-order critical rotating speeds to form very slender high-speed flexible rotors. The low-pressure rotor of a turbofan engine has the characteristics of small volume, high rotating speed, large length-diameter ratio and the like, so that the structural design of the low-pressure rotor is compact, the number of the fulcrums is large, the axial distance between the two fulcrums at the turbine end is very short (less than 100mm), great difficulty is brought to the dynamic test of the low-pressure rotor, and the reliability and safety problems of the fulcrum support at the turbine end are mainly reflected.

For two pivot points which are very close to each other, in the prior art, as shown in fig. 1, a pull rod C is adopted for connecting and fastening two bearing blocks a and B, nuts are adopted for fastening, and then the bearing block B is connected and fastened with a test support for testing. The bearing seat A is suspended, so that the two fulcrums cannot be supported effectively, and the rigidity of the pull rod C is insufficient, so that the risk is certain, and the test safety is influenced.

Disclosure of Invention

In order to solve the problems, the invention discloses a combined type rigidity test support, which comprises:

a base;

and the combined base bodies are symmetrically distributed at the tops of the bases, are used for installing test bearings and are rotationally connected with the aircraft engine rotor through the test bearings.

Preferably, the test support further comprises a bottom plate;

the base plate is fixed at the bottom of the base in a bolt connection mode, and the base plate is fixedly connected to the test platform through a bolt assembly penetrating through the base plate and the base.

Preferably, rib plates are arranged on two sides of the base.

Preferably, the combined seat body comprises an upper half seat and a lower half seat;

the upper half seat and the lower half seat are connected through a plurality of groups of bolt assemblies which are symmetrically distributed on two sides, and the upper half seat and the lower half seat are provided with a circular through hole by taking a connecting part as a center and are used for installing the test bearing.

Preferably, the plurality of symmetrically distributed combined base bodies are arranged at intervals, and the circular through holes of the plurality of combined base bodies are coaxially arranged.

Preferably, the junction of first seat and second seat corresponds and is equipped with first constant head tank, first seat passes through first constant head tank cooperation locating pin corresponds the installation of second seat.

Preferably, the two sides of the lower half seat are provided with mounting lug seats, and the lower half seat is connected with the base through the mounting lug seats in a threaded connection mode.

Preferably, the top of base perpendicular to combination pedestal's installation direction is equipped with T type groove, the base passes through T type groove slidable mounting T type bolt, and passes through T type bolted connection the installation ear seat.

Preferably, the bottom of bottom plate is equipped with the location panel, test platform corresponds the location panel is equipped with the second constant head tank, test platform passes through location panel cooperation second constant head tank is fixed a position the installation to the bottom plate.

Preferably, hanging rings are symmetrically distributed on two sides of the top of the base and used for hoisting the test support.

Preferably, the top of the combined base body is provided with a mounting boss, the top of the mounting boss and the side end face of the combined base body are both provided with threaded holes, and the threaded holes are used for mounting a vibration acceleration sensor for monitoring the vibration of the test support.

The overall structure of the invention is designed to increase two combined base bodies on the base, thereby realizing effective support of the rotor with shorter fulcrum span, further ensuring that the fulcrums with similar distances have effective supporting points, and further increasing the support rigidity of the structure. The test support is positioned and installed by matching the positioning panel with the second positioning groove, and is connected and fastened by matching with the T-shaped sliding groove and the T-shaped bolt, so that the test support is convenient to disassemble and assemble; in addition, the position of the combined base bodies arranged at intervals can be adjusted through the T-shaped bolts, so that the axial distance of the combined base bodies can be adjusted according to the fulcrum span of the rotor, and therefore the combined base can be matched with rotors with different supporting spans to meet the requirement of a rotor test. On the other hand, the combined base body is also convenient to disassemble, assemble and maintain.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 shows a schematic view of a rotor test scheme according to the prior art;

FIG. 2 shows a front view of a test seat according to an embodiment of the invention;

FIG. 3 shows a left side view of a test mount according to an embodiment of the present invention.

In the figure: 100. a combined seat body; 11. an upper half seat; 12. a lower half seat; 13. a first connecting seat; 14. a second connecting seat; 15. mounting a boss; 16. mounting an ear seat; 17. positioning pins; 200. a base; 21. a T-shaped groove; 300. a base plate; 31. positioning the panel; 400. a T-bolt; 500. a hoisting ring; 600. a rib plate; h1, circular through holes; h2, first positioning groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

The invention provides a combined type rigidity test support, as shown in fig. 2, wherein the test support comprises: the combined base body 100 is symmetrically distributed at the top of the base 200 and used for installing a test bearing, and the combined base body 100 is rotatably connected with an aircraft engine rotor through the test bearing.

In an embodiment of the present invention, the overall structure of the rigidity test support is designed to be that two combined base bodies 100 are additionally arranged on a base 200, so as to realize effective support for a rotor with a shorter fulcrum span, thereby ensuring that fulcrums with similar distances all have effective supporting points, and further increasing the support rigidity of the structure.

Referring to fig. 2, the test support further comprises a bottom plate 300, the bottom plate 300 is fixed at the bottom of the base 200 by means of bolts, and the bottom plate 300 is fixedly connected to the test platform by means of bolt assemblies penetrating through the bottom plate 300 and the base 200.

In this embodiment, two sets of T-shaped chutes are arranged in parallel at the top of the test platform, and before the test support is installed, a plurality of sets of T-shaped bolts 400 are preset in the T-shaped chutes, and the positions of the T-shaped bolts 400 are adjusted, so that the T-shaped bolts 400 are directly opposite to the installation holes on the bottom plate 300, and the bottom plate 300 and the test support are fixedly connected through the T-shaped bolts 400 and nuts.

It should be noted that the position of the test support can be adjusted by moving the position of the T-bolt 400 in the T-shaped sliding groove in advance, so that the installation position of the test support can be conveniently preset, and the subsequent test process can be conveniently performed.

Referring to fig. 2, in this embodiment, the base 200 may be a T-shaped structure, the top of the T-shaped structure is used for mounting the combined base body 100, two sides of the T-shaped structure are provided with outer ear seats, and two sides of the base 200 are provided with rib plates 600 for improving the rigidity of the base 200 and meeting the requirement of the rotor test. The ribbed plate 600 is arranged on the outer ear seats, a plurality of groups of mounting holes are preset on the outer ear seats on two sides of the ribbed plate 600 and correspond to the mounting holes on the bottom plate 300, and during installation, the T-shaped bolts 400 sequentially penetrate through the mounting holes on the bottom plate 300 and the base 200 and are locked through nuts used in a matched mode to fixedly connect the test support and the test platform. Of course, the base 200 of the present embodiment may also be a cylindrical structure, and is not limited to the T-shaped structure, the configuration of the base 200 may satisfy the function of being able to be installed corresponding to the bottom plate 300 and fixedly connect to the testing platform, and the configuration of the base 200 is not specifically limited in the present embodiment.

Further, referring to fig. 2, a plurality of sets of mounting threaded holes are preset on the bottom plate 300, and through holes are provided on the mounting bosses 15 of the base 200 corresponding to the mounting threaded holes. When the base plate 300 and the base plate 200 are installed and connected, the fixing bolt passes through the through hole on the base plate 200 to form threaded connection with the installation threaded hole on the base plate 300, and the base plate 300 and the base plate 200 are locked and fixed.

Referring to fig. 2, the combined seat 100 includes an upper half seat 11 and a lower half seat 12; first seat 11 is the semicircular column structure in cross-section, and second seat 12 is the quadrangular structure that corresponds first seat 11 and set up, and first seat 11 and second seat 12's both sides correspond respectively and are equipped with first connecting seat 13 and second connecting seat 14, first seat 11 runs through in proper order with second seat 12 through bilateral symmetry's multiunit bolt assembly first connecting seat 13 and second connecting seat 14 connect, and first seat 11 and second seat 12 use the junction to be equipped with circular through-hole h1 as the center for the installation experimental bearing. During actual use, the edge of the circular through hole h1 is chamfered, so that the test bearing is convenient to disassemble and assemble. Of course, after the test bearing is installed, the stop flanges are also needed to be installed at the circumferential positions on the two sides of the circular through hole h1 in a matching mode. The middle part of the stop flange is provided with a circular notch corresponding to the test bearing. When the rotor is tested, the fulcrums at the two ends of the rotor penetrate through the circular notch to abut against the test bearing. In addition, the symmetrically distributed combination bases 100 are arranged at intervals, and the circular through holes h1 of the combination bases 100 are coaxially arranged.

Referring to fig. 3, the first connecting seat 13 and the second connecting seat 14 at the joint of the upper seat half 11 and the lower seat half 12 are correspondingly provided with a first positioning groove h2, and before the upper seat half 11 and the lower seat half 12 are locked and connected, the upper seat half 11 positions the upper seat half 11 and the lower seat half 12 through the first positioning groove h2 and the positioning pin 17. The positioning pin 17 may be a cylindrical structure, and the structure of the first positioning groove h2 is configured to correspond to the cylindrical structure of the positioning pin 17, so that the positioning pin 17 is matched with the first positioning groove h2 to position the upper half seat 11 and the lower half seat 12. Of course, the positioning pin 17 of the present embodiment may also have a prism structure or other special-shaped structure, and is not limited to the above cylindrical structure, in this case, the structure of the first positioning groove h2 is set corresponding to the structure of the positioning pin 17, and the positioning pin 17 may be configured to match the first positioning groove h2 to position the upper half seat 11 and the lower half seat 12, and the configuration of the positioning pin 17 is not specifically limited in the present embodiment.

In this embodiment, a plurality of the combination bases 100 are arranged at intervals, the circular through holes h1 between the combination bases 100 are coaxially arranged, and when a rotor test is performed, the test bearing is assembled in the circular through hole h1, and the test bearing is rotatably connected with the rotor, so that all supporting points on the outer side of the circumference of the rotor are effectively supported, the test stability of the test support is further improved, and the test safety is ensured.

In one embodiment of the present invention, referring to fig. 2, the bottom of the lower half 12 is further provided with mounting ears 16, and is connected to the base 200 by the mounting ears 16 in a threaded manner. The top of the base 200 is provided with a T-shaped groove 21 perpendicular to the installation direction of the combined base body 100, the base 200 is slidably provided with a T-shaped bolt 400 through the T-shaped groove 21, and the T-shaped bolt 400 is connected with the installation lug 16.

Wherein, the bilateral symmetry of lower half seat 12 sets up installation ear seat 16, is equipped with the multiunit via hole on the above-mentioned installation ear seat 16, and the perpendicular to is equipped with T type groove 21 in the direction of combination pedestal 100 on the base 200, and T type bolt 400 is provided with to slide in T type groove 21. When the combination seat 100 and the base 200 are assembled, the position of the T-shaped bolt 400 is pre-adjusted, the through hole of the mounting lug 16 is mounted corresponding to the T-shaped bolt 400, and the T-shaped bolt 400 is locked by a nut used in cooperation, so that the combination seat 100 and the base 200 are fixedly connected.

Further, the position of the combined base body 100 arranged at intervals can be adjusted through the T-shaped bolts 400, so that the axial distance of the combined base body 100 can be adjusted according to the fulcrum span of the rotor, and therefore the combined base body can be matched with rotors with different supporting spans, and the rotor test requirements are met. On the other hand, the combined base 100 is also convenient to disassemble, assemble and maintain.

Furthermore, the screw of the T-bolt 400 is in transition fit with the inner wall of the T-shaped groove 21, so that when the combined base 100 is installed or adjusted, the installation direction of the combined base 100 is always perpendicular to the groove body direction of the T-shaped groove 21, and further, the centers of the combined bases 100 arranged at intervals are coaxially arranged and coincide with each other, so as to improve the stability of the rotor test.

Referring to fig. 2, a positioning panel 31 is disposed at the bottom of the bottom plate 300, a second positioning groove is disposed on the test platform corresponding to the positioning panel 31, and the test platform is used for positioning and installing the bottom plate 300 through the positioning panel 31 matching with the second positioning groove. In this embodiment, the positioning strip 31 is a strip structure, and cooperates with the second positioning groove to position the mounting process of the bottom plate 300.

Furthermore, in order to limit the installation direction of the test support and prevent the error of the installation direction of the test support caused by the misoperation of workers, a limiting block can be arranged at one end of the positioning panel 31, the cross-sectional dimension of the limiting block is larger than that of the positioning panel 31, and a limiting groove is arranged at one end of the corresponding second positioning groove. When in actual use, when the installation direction of the test support is wrong, the limit block does not correspond to the limit groove for installation, at the moment, the test support cannot be completely installed in place, the worker can reinstall the test support according to the on-site representation, and the fact that the installation direction of the test support cannot be wrong is guaranteed.

Still further, test platform and test support be connected and lock through T type bolt 400, and the connection process is fixed a position through location panel 31 simultaneously, and the whole installation connection process is simple swift, also can conveniently demolish in addition, effectively improves staff's work efficiency.

Referring to fig. 2, the two sides of the top of the base 200 are symmetrically distributed with hanging rings 500 for hoisting the test support and positioning and mounting the test support corresponding to the test platform. The number of the hanging rings 500 is at least two, the top of the base 200 is fixed in a welding mode, of course, a screw rod can be welded at the bottom of the hanging ring 500, a threaded hole is formed in the top of the corresponding base 200, the hanging ring 500 is in locking connection with the base 200 through the screw rod matching with the threaded hole in the base 200, and the fixing mode of the hanging ring 500 is not specifically limited in this embodiment. When the test support is used, the hoisting equipment sequentially penetrates through the hoisting rings 500, and the center of gravity of the test support is controlled not to shift after hoisting, so that the positioning and mounting process of the test support can be smoothly carried out, and the test safety is further ensured.

Referring to fig. 2, a mounting boss 15 is disposed at the top of the combined base 100, the top end surface of the mounting boss 15 is parallel to the connecting surface of the upper half base 11 and the lower half base 12, and both the top of the mounting boss 15 and the side end surface of the combined base 100 are provided with threaded holes for mounting a vibration acceleration sensor for monitoring vibration of the test support. In the embodiment, a plurality of groups of vibration acceleration sensors are arranged in the circumferential direction of the supporting point of the rotor to carry out vibration monitoring on the test process of the rotor, so that a plurality of groups of vibration data are collected to be analyzed, and the reliability of a data analysis result is improved.

In this embodiment, the vibration acceleration sensor is fixedly mounted on the threaded hole in a threaded connection manner, and in the rotor experiment process, the vibration generated by the rotation of the rotor is sequentially transmitted to the vibration acceleration sensor distributed on the combined base 100 through the test bearing and the combined base 100, where the vibration acceleration sensor may be a piezoelectric acceleration sensor, and the piezoelectric acceleration sensor uses a piezoelectric material as a sensing element. An oscillating mass block in the sensor generates an inertia force under the action of acceleration, and the force generates a piezoelectric effect on a piezoelectric material with certain rigidity. In a frequency range lower than the natural frequency of the oscillating mass, the electric quantity output by the sensor is in direct proportion to the acceleration. The acceleration is represented by the output electric quantity of the sensor, so that the vibration generated by the rotation of the rotor is represented in a quantized mode.

Of course, the vibration acceleration sensor may also be a piezoresistive acceleration sensor, a capacitive acceleration sensor, or other types of vibration acceleration sensors, and the acceleration is represented by using different parameters by setting different sensitive elements, so as to achieve the purpose of measuring the vibration. The present embodiment does not limit the specific type of the vibration acceleration sensor.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A modular rigid test mount, said test mount comprising:

a base (200);

the combined base bodies (100) are symmetrically distributed on the top of the base (200) and used for mounting test bearings, and the test bearings are rotatably connected with an aircraft engine rotor.

2. The modular rigid test mount of claim 1, further comprising a base plate (300);

the base plate (300) is fixed at the bottom of the base (200) in a bolt connection mode, and the base plate (300) is fixedly connected to the test platform through a bolt assembly penetrating through the base plate (300) and the base (200).

3. The combined type rigidity test support according to claim 1 or 2, wherein the base (200) is provided with ribs (600) at two sides.

4. The modular rigidity test stand according to claim 1, characterized in that the modular seat body (100) comprises an upper half seat (11) and a lower half seat (12);

first seat (11) and second seat (12) are connected through the multiunit bolt assembly of bilateral symmetry distribution, and first seat (11) and second seat (12) use the junction to be equipped with circular through-hole (h1) as the center for the installation experimental bearing.

5. The combined type rigidity test support according to claim 4, wherein a plurality of the combined seat bodies (100) are arranged at intervals, and the circular through holes (h1) of the combined seat bodies (100) are coaxially arranged.

6. The combined type rigidity test support according to claim 4, characterized in that the joint of the upper half seat (11) and the lower half seat (12) is correspondingly provided with a first positioning groove (h2), and the upper half seat (11) is correspondingly provided with the lower half seat (12) through the first positioning groove (h2) matched with the positioning pin (17).

7. The combined type rigidity test support according to claim 6, wherein the lower half seat (12) is provided with mounting lug seats (16) at two sides and is connected with the base (200) in a threaded manner through the mounting lug seats (16).

8. The combined type rigidity test support according to claim 7, wherein a T-shaped groove (21) is arranged on the top of the base (200) perpendicular to the installation direction of the combined base body 100, the base (200) is slidably provided with a T-shaped bolt (400) through the T-shaped groove (21), and is connected with the installation lug seat (16) through the T-shaped bolt (400).

9. The combined type rigidity test support according to claim 2, wherein a positioning panel (31) is provided at the bottom of the bottom plate (300), a second positioning groove is provided on the test platform corresponding to the positioning panel (31), and the test platform is used for positioning and installing the bottom plate (300) through the positioning panel (31) matching with the second positioning groove.

10. The combined type rigidity test support according to claim 9, wherein the top of the base (200) is symmetrically distributed with hanging rings (500) at both sides for hoisting the test support.

11. The combined type rigidity test support according to claim 4 or 5, wherein a mounting boss (15) is arranged at the top of the combined base body (100), and threaded holes are arranged at the top of the mounting boss (15) and the side end face of the combined base body (100) and used for mounting a vibration acceleration sensor for monitoring the vibration of the test support.