CN114577459B - Single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed and test method - Google Patents
Single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed and test method Download PDFInfo
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- CN114577459B CN114577459B CN202210250995.1A CN202210250995A CN114577459B CN 114577459 B CN114577459 B CN 114577459B CN 202210250995 A CN202210250995 A CN 202210250995A CN 114577459 B CN114577459 B CN 114577459B
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- G01M13/00—Testing of machine parts
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/027—Test-benches with force-applying means, e.g. loading of drive shafts along several directions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed and a test method thereof comprise a base, an inner ring plate, an outer ring plate, blades, a blade corner adjusting transmission assembly and an electric push rod; the inner and outer annular plates are semicircular and coaxially distributed, and the openings of the inner and outer annular plates are downwards fixedly connected on the base; the vanes are arranged between the inner ring plate and the outer ring plate, and the rotating shafts at the top ends of the vanes extend out of the outer ring plate; the blade corner adjusting transmission assembly and the electric push rod are arranged on the outer ring plate; the electric push rod is in transmission connection with the rotating shaft at the top end of the blade through the blade corner adjusting transmission assembly. The method comprises the following steps: assembling a blade corner adjusting transmission assembly with preset abrasion degree, roughness and joint clearance between a blade and an electric push rod; adhering strain gauges to each force transmission part in the blade corner adjusting transmission assembly, and connecting the strain gauges to a computer; starting an electric push rod to output driving force, controlling the blades to adjust the rotating angle, and analyzing stress strain data by a computer; the degree of wear, roughness, joint clearance were varied and the test repeated.
Description
Technical Field
The invention belongs to the technical field of dynamic characteristic testing of a static blade adjusting mechanism, and particularly relates to a dynamic characteristic simulation test bed and a dynamic characteristic simulation test method of a single-stage static blade adjusting mechanism.
Background
The stator blade adjusting mechanism is mainly used for adjusting and controlling the position and displacement of a blade with certain precision as a key structure of the gas compressor, and is related to industries such as ships, vehicles, buildings and the like, such as a mechanical blade adjusting mechanism of an axial flow pump, a stator blade adjusting mechanism of a marine gas turbine and the like.
The practical application of the adjustable blade in the turbojet engine has appeared in the 20 th century, and with the continuous development of the technology, the adjustable blade also has a certain application in the machine structure design of military aircraft engines, and is then gradually applied to the field of civil aviation. Meanwhile, the stator blade adjusting mechanism is also applied to relevant equipment in industries such as vehicles, robots and buildings, and is characterized in that the stator blade adjusting mechanism provides power through an actuating system to drive a multi-stage transmission component to link, so that the rotation angle of the blade is adjusted.
Taking an aircraft engine as an example, along with the increase of the working time of the gas compressor, the phenomenon of clamping stagnation of the static blade adjusting mechanism occurs sometimes, so that the performance of the gas compressor is influenced and even the gas compressor is damaged. When the blade angle adjustment is delayed due to the friction torque caused by aerodynamic force, the adjustment precision of the blade is seriously influenced. In addition, although a bushing for reducing the rotating friction force of the stator blade is installed between the blade rotating shaft and the casing, the surface friction coefficient of the bushing gradually deteriorates with the working time, the joint clearance changes, the abrasion of the material surface is intensified, and the blocking moment of the blade during rotation is difficult to avoid. Therefore, it is an urgent problem to solve the problem of the sticking of the vane adjusting mechanism.
Since the overall structure of the stationary blade adjusting mechanism is complex, there are many locations where the drag force is generated, and therefore, fault detection and analysis have an important role in optimizing the structure of the stationary blade adjusting mechanism. At present, most of research on stationary blade adjusting mechanisms at home and abroad is carried out, but complete dynamic characteristic simulation test equipment is lacked.
For example, although a chinese patent application No. 202120131913.2 discloses a compressor stator blade adjusting mechanism, a key part of a link ring in the chinese patent application cannot translate along an axis, and thus cannot fully represent the dynamic characteristics of the mechanism during movement. For example, chinese patent application No. 202011269167.X discloses a stress-strain test bed of a vane adjusting mechanism considering the influence of temperature, but the patent application only relates to the influence of temperature on the blade adjusting accuracy, and does not consider the influence of friction and clearance on the blade adjusting accuracy at all. For example, although a stationary blade adjusting mechanism of an axial flow compressor is disclosed in chinese patent application No. 202022922630.8, an adjusting cylinder in this patent application is directly connected to a link ring, and there is no necessary multi-stage transmission component, and the influence of the friction and clearance of the multi-stage transmission component on the blade adjusting precision cannot be studied.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed and a test method, which can research the influence of factors such as friction and clearance in a stationary blade adjusting mechanism on the blade adjusting precision, can meet the requirement of simulating the dynamic characteristic of a multistage transmission part in the stationary blade adjusting mechanism under different working conditions, can accurately reflect the dynamic characteristic influence rule in actual machinery, obtain the influence rule of the multistage transmission part in the stationary blade adjusting mechanism on the blade adjusting precision under different abrasion degrees, and further research the cause of clamping stagnation generated in the stationary blade adjusting mechanism.
In order to achieve the purpose, the invention adopts the following technical scheme: a single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed comprises a base, an inner ring plate, an outer ring plate, blades, a blade corner adjusting transmission assembly and an electric push rod; the outer ring plate is of a semicircular structure, and an opening of the outer ring plate faces downwards and is fixedly connected with the upper surface of the base; a load applying abdicating window is arranged on the half side plate body of the outer ring plate; the inner ring plate is of a semicircular structure, the radius of the inner ring plate is smaller than that of the outer ring plate, the opening of the inner ring plate faces downwards and is fixedly connected with the upper surface of the base, and the inner ring plate is positioned on the inner side of the outer ring plate and is coaxially distributed with the inner ring plate and the outer ring plate; the blades are arranged between the inner ring plate and the outer ring plate, lower rotating shafts of the blades are connected with the inner ring plate through lower bushings and joint bearings, top rotating shafts of the blades are connected with the outer ring plate through upper bushings and joint bearings, and top rotating shafts of the blades extend out of the outer ring plate; the blade corner adjusting transmission assembly and the electric push rod are both arranged on the other half side plate body of the outer ring plate on the opposite side of the load applying abdicating window; and the electric push rod is in transmission connection with the top rotating shaft of the blade through the blade corner adjusting transmission assembly.
An electric push rod supporting seat is fixedly arranged on the outer ring plate; the bottom end of the shell of the electric push rod is hinged with the electric push rod supporting seat through a joint bearing.
The blade corner adjusting transmission assembly comprises a first transmission rod, a transmission shaft and a transmission shaft supporting seat; the top end of the push rod of the electric push rod is hinged with one end of the first transmission rod through a shaft pin; the transmission shaft is connected to the transmission shaft supporting seat through a joint bearing, and the transmission shaft supporting seat is fixedly arranged on the outer ring plate; the other end of the first transmission rod is fixedly connected with the transmission shaft.
The blade corner adjusting transmission assembly further comprises a second transmission rod, a third transmission rod and a fourth transmission rod; one end of the second transmission rod is fixedly connected to the transmission shaft, the other end of the second transmission rod is hinged to one end of the third transmission rod through a shaft pin, and the other end of the third transmission rod is hinged to one end of the fourth transmission rod through a shaft pin.
The blade corner adjusting transmission assembly further comprises a pull rod, and one end of the pull rod is hinged to the other end of the fourth transmission rod through a shaft pin.
The blade corner adjusting transmission assembly further comprises a linkage rod, the linkage rod is of a circular arc structure, and the linkage rod is located on the outer side of the outer ring plate and is coaxially distributed with the outer ring plate; the upper surface of the linkage rod is fixedly provided with a hinge lug seat, and the other end of the pull rod is connected with the hinge lug seat through a joint bearing.
The blade corner adjusting transmission assembly further comprises a swing rod, one end of the swing rod is hinged with the linkage rod through a shaft pin, and the other end of the swing rod is fixedly connected with a rotating shaft at the top end of the blade.
The number of the blades is at least one; when the number of the blades is multiple, the blades are uniformly distributed between the inner ring plate and the outer ring plate along the circumferential direction, and each blade is in transmission connection with the linkage rod through a swing rod.
A single-stage stationary blade adjusting mechanism dynamic characteristic simulation test method adopts the single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed and comprises the following steps:
the method comprises the following steps: assembling the selected blade corner adjusting transmission assembly between the blade and the electric push rod, wherein the abrasion degree, the roughness and the joint clearance of each joint part in the blade corner adjusting transmission assembly are preset;
step two: the surfaces of each transmission rod, each pull rod, each linkage rod and each oscillating bar in the blade corner adjusting transmission assembly are pasted with strain gauges, and the data output ends of the strain gauges are connected into a computer through a data acquisition instrument;
step three: starting the electric push rod, transmitting the driving force output by the electric push rod to the blade through the blade corner adjusting transmission assembly to control the blade to perform corner adjustment, and analyzing stress strain data through a computer;
step four: and changing the set values of the abrasion degree, the roughness and the joint clearance of each joint part in the blade corner adjusting transmission assembly, repeating the second step and the third step, and analyzing the influence rule of the blade adjusting precision under different abrasion degrees, roughness and joint clearances through data comparison.
The invention has the beneficial effects that:
the invention provides a single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed and a test method. The whole test bed is designed based on an actual compressor structure, so that the actual dynamic characteristics generated when the test bed runs have reference value, and the dynamic characteristics of the static blade adjusting mechanism under different service lives can be simulated by replacing joint parts with different abrasion degrees on the basis, so that the dynamic characteristic influence rule in actual machinery is accurately reflected, the influence rule on the blade adjusting precision under different abrasion degrees is obtained, and the cause of clamping stagnation of the static blade adjusting mechanism can be explored. The blade corner adjusting transmission assembly in the test bed can be integrally replaced, the joint clearance of the joint component is changed, the influence rule on the blade adjusting precision under different joint clearances is obtained, theoretical experimental verification is achieved, and meanwhile the joint component which mainly influences the blade adjusting precision can be further analyzed.
Drawings
FIG. 1 is a schematic structural diagram (view angle one) of a single-stage stationary blade adjusting mechanism dynamics simulation test bed according to the present invention;
FIG. 2 is a schematic structural diagram (view two) of a single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed according to the present invention;
FIG. 3 is a schematic structural diagram (view three) of a single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed according to the present invention;
FIG. 4 is a schematic structural diagram (view angle four) of a single-stage stationary blade adjusting mechanism dynamics simulation test bed according to the present invention;
in the figure, 1-a base, 2-an inner ring plate, 3-an outer ring plate, 4-a blade, 5-an electric push rod, 6-a load application abdicating window, 7-a lower bushing, 8-an upper bushing, 9-an electric push rod supporting seat, 10-a first transmission rod, 11-a transmission shaft, 12-a transmission shaft supporting seat, 13-a second transmission rod, 14-a third transmission rod, 15-a fourth transmission rod, 16-a pull rod, 17-a linkage rod, 18-a hinge lug seat and 19-a swing rod.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1 to 4, a single-stage stationary blade adjusting mechanism dynamics simulation test bed comprises a base 1, an inner ring plate 2, an outer ring plate 3, blades 4, a blade rotation angle adjusting transmission assembly and an electric push rod 5; the outer ring plate 3 is of a semicircular structure, and an opening of the outer ring plate 3 faces downwards and is fixedly connected with the upper surface of the base 1; a load applying abdicating window 6 is arranged on the half side plate body of the outer ring plate 3; the inner ring plate 2 is of a semicircular structure, the radius of the inner ring plate 2 is smaller than that of the outer ring plate 3, the opening of the inner ring plate 2 faces downwards and is fixedly connected with the upper surface of the base 1, and the inner ring plate 2 is positioned on the inner side of the outer ring plate 3 and is coaxially distributed with the outer ring plate 3; the blades 4 are arranged between the inner ring plate 2 and the outer ring plate 3, lower rotating shafts of the blades 4 are connected with the inner ring plate 2 through lower bushings 7 and joint bearings, top rotating shafts of the blades 4 are connected with the outer ring plate 3 through upper bushings 8 and joint bearings, and top rotating shafts of the blades 4 extend out of the outer ring plate 3; the blade rotation angle adjusting transmission assembly and the electric push rod 5 are arranged on the other half side plate body of the outer ring plate 3 on the opposite side of the load applying abdicating window 6; and the electric push rod 5 is in transmission connection with the top rotating shaft of the blade 4 through the blade corner adjusting transmission assembly.
An electric push rod supporting seat 9 is fixedly arranged on the outer ring plate 3; the bottom end of the shell of the electric push rod 5 is hinged with the electric push rod supporting seat 9 through a joint bearing.
The blade corner adjusting transmission assembly comprises a first transmission rod 10, a transmission shaft 11 and a transmission shaft supporting seat 12; the top end of the push rod of the electric push rod 5 is hinged with one end of the first transmission rod 10 through a shaft pin; the transmission shaft 11 is connected to a transmission shaft supporting seat 12 through a joint bearing, and the transmission shaft supporting seat 12 is fixedly arranged on the outer ring plate 3; the other end of the first transmission rod 10 is fixedly connected with the transmission shaft 11.
The blade corner adjusting transmission assembly further comprises a second transmission rod 13, a third transmission rod 14 and a fourth transmission rod 15; one end of the second transmission rod 13 is fixedly connected to the transmission shaft 11, the other end of the second transmission rod 13 is hinged to one end of the third transmission rod 14 through a shaft pin, and the other end of the third transmission rod 14 is hinged to one end of the fourth transmission rod 15 through a shaft pin.
The blade corner adjusting transmission assembly further comprises a pull rod 16, and one end of the pull rod 16 is hinged to the other end of the fourth transmission rod 15 through a shaft pin.
The blade corner adjusting transmission assembly further comprises a linkage rod 17, the linkage rod 17 is of a circular arc structure, and the linkage rod 17 is located on the outer side of the outer ring plate 3 and is coaxially distributed with the outer ring plate; the upper surface of the linkage rod 17 is fixedly provided with a hinge lug seat 18, and the other end of the pull rod 16 is connected with the hinge lug seat 18 through a joint bearing.
The blade corner adjusting transmission assembly further comprises a swing rod 19, one end of the swing rod 19 is hinged with the linkage rod 17 through a shaft pin, and the other end of the swing rod 19 is fixedly connected with a top rotating shaft of the blade 4.
The number of the blades 4 is at least one; when the number of the blades 4 is multiple, the blades 4 are uniformly distributed between the inner ring plate 2 and the outer ring plate 3 along the circumferential direction, and each blade 4 is in transmission connection with the linkage rod 17 through a swing rod 19.
A single-stage stationary blade adjusting mechanism dynamic characteristic simulation test method adopts the single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed and comprises the following steps:
the method comprises the following steps: assembling the selected blade rotation angle adjusting transmission assembly between the blade 4 and the electric push rod 5, wherein the abrasion degree, the roughness and the joint clearance of each joint part in the blade rotation angle adjusting transmission assembly are preset;
step two: the surfaces of each transmission rod, the pull rod 16, the linkage rod 17 and the swing rod 19 in the blade corner adjusting transmission assembly are pasted with strain gauges, and the data output ends of the strain gauges are connected into a computer through a data acquisition instrument;
step three: starting the electric push rod 5, transmitting the driving force output by the electric push rod 5 to the blade 4 through the blade corner adjusting transmission assembly so as to control the blade 4 to perform corner adjustment, and analyzing stress strain data through a computer;
step four: and changing the set values of the abrasion degree, the roughness and the joint clearance of each joint part in the blade corner adjusting transmission assembly, repeating the second step and the third step, and analyzing the influence rule of the blade adjusting precision under different abrasion degrees, roughness and joint clearances through data comparison.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.
Claims (1)
1. A single-stage stationary blade adjusting mechanism dynamic characteristic simulation test method adopts a single-stage stationary blade adjusting mechanism dynamic characteristic simulation test bed, and is characterized in that: the test bed comprises a base, an inner ring plate, an outer ring plate, blades, a blade rotation angle adjusting transmission assembly and an electric push rod; the outer ring plate is of a semicircular structure, and an opening of the outer ring plate faces downwards and is fixedly connected with the upper surface of the base; a load applying abdicating window is arranged on the half side plate body of the outer ring plate; the inner ring plate is of a semicircular structure, the radius of the inner ring plate is smaller than that of the outer ring plate, the opening of the inner ring plate faces downwards and is fixedly connected with the upper surface of the base, and the inner ring plate is positioned on the inner side of the outer ring plate and is coaxially distributed with the inner ring plate and the outer ring plate; the blades are arranged between the inner ring plate and the outer ring plate, lower rotating shafts of the blades are connected with the inner ring plate through lower bushings and joint bearings, top rotating shafts of the blades are connected with the outer ring plate through upper bushings and joint bearings, and top rotating shafts of the blades extend out of the outer ring plate; the blade corner adjusting transmission assembly and the electric push rod are both arranged on the half side plate body of the outer ring plate on the opposite side of the load applying abdicating window; the electric push rod is in transmission connection with a rotating shaft at the top end of the blade through a blade corner adjusting transmission assembly; an electric push rod supporting seat is fixedly arranged on the outer ring plate; the bottom end of the shell of the electric push rod is hinged with the electric push rod supporting seat through a joint bearing; the blade corner adjusting transmission assembly comprises a first transmission rod, a transmission shaft and a transmission shaft supporting seat; the top end of the push rod of the electric push rod is hinged with one end of the first transmission rod through a shaft pin; the transmission shaft is connected to the transmission shaft supporting seat through a joint bearing, and the transmission shaft supporting seat is fixedly arranged on the outer ring plate; the other end of the first transmission rod is fixedly connected with the transmission shaft; the blade corner adjusting transmission assembly further comprises a second transmission rod, a third transmission rod and a fourth transmission rod; one end of the second transmission rod is fixedly connected to the transmission shaft, the other end of the second transmission rod is hinged to one end of the third transmission rod through a shaft pin, and the other end of the third transmission rod is hinged to one end of the fourth transmission rod through a shaft pin; the blade corner adjusting transmission assembly further comprises a pull rod, and one end of the pull rod is hinged with the other end of the fourth transmission rod through a shaft pin; the blade corner adjusting transmission assembly further comprises a linkage rod, the linkage rod is of a circular arc structure, and the linkage rod is located on the outer side of the outer ring plate and is coaxially distributed with the outer ring plate; a hinge lug seat is fixedly arranged on the upper surface of the linkage rod, and the other end of the pull rod is connected with the hinge lug seat through a joint bearing; the blade corner adjusting transmission assembly further comprises a swing rod, one end of the swing rod is hinged with the linkage rod through a shaft pin, and the other end of the swing rod is fixedly connected with a rotating shaft at the top end of the blade; the number of the blades is at least one; when the number of the blades is multiple, the blades are uniformly distributed between the inner ring plate and the outer ring plate along the circumferential direction, and each blade is in transmission connection with the linkage rod through a swing rod; the test method comprises the following steps:
the method comprises the following steps: assembling the selected blade corner adjusting transmission assembly between the blade and the electric push rod, wherein the abrasion degree, the roughness and the joint clearance of each joint part in the blade corner adjusting transmission assembly are preset;
step two: pasting strain gauges on the surfaces of each transmission rod, each pull rod, each linkage rod and each oscillating bar in the blade corner adjusting transmission assembly, and connecting the data output ends of the strain gauges into a computer through a data acquisition instrument;
step three: starting the electric push rod, transmitting the driving force output by the electric push rod to the blade through the blade corner adjusting transmission assembly to control the blade to perform corner adjustment, and analyzing stress strain data through a computer;
step four: and changing the set values of the abrasion degree, the roughness and the joint clearance of each joint part in the blade corner adjusting transmission assembly, repeating the second step and the third step, and analyzing the influence rule of the blade adjusting precision under different abrasion degrees, roughness and joint clearances through data comparison.
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| CN116754208B (en) * | 2023-08-16 | 2023-11-07 | 天津航天瑞莱科技有限公司 | Fatigue test device for static blade adjusting mechanism assembly of compressor |
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| US7594794B2 (en) * | 2006-08-24 | 2009-09-29 | United Technologies Corporation | Leaned high pressure compressor inlet guide vane |
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