KR102497756B1 - An Apparatus for Investigating a Vibration Property of a Reduction Gear Box - Google Patents

Abstract

The present invention relates to a device for measuring vibration characteristics of a motor car reducer. An apparatus for measuring vibration characteristics of a motor car reducer includes at least one vibration measurement module (13_1 to 13_N) installed in the reducers 12a and 12b of the motor car; a data collection unit connected to at least one vibration measurement module (13_1 to 13_N); and an analysis unit that analyzes the information collected by the data collection unit, and each of the vibration measurement modules 13_1 to 13_N is detachably installed in the reduction gears 12a and 12b.

Description

Vibration property measuring device of motor car reducer {An Apparatus for Investigating a Vibration Property of a Reduction Gear Box}

The present invention relates to a device for measuring vibration characteristics of a motor car reducer, and more specifically, to a device for measuring vibration characteristics of a motor car reducer that analyzes whether a motor car is abnormal by detecting vibration characteristics generated by the motor car reducer in a running state. .

Motor cars can be used in various fields, and motor cars can be used for diagnosis or maintenance of train tracks. A motor car may run along a track for maintenance work and may be exposed to various shocks or vibrations. Therefore, for the development of motor cars, it is necessary to detect and analyze various vibration characteristics generated in motor cars. In addition, it is necessary to detect whether or not the motor car is in an abnormal state for the motor car to properly perform maintenance work, and for this purpose, it is advantageous to detect and analyze vibration characteristics. EP registration number EP00732451 discloses a motor vehicle operated by hydraulic pressure and used for track maintenance. In addition, Patent Registration No. 10-1524981 discloses a railway rail maintenance vehicle. Since the maintenance vehicle runs along the track, it needs to have a suitable structure, and the maintenance vehicle itself must be maintained in a normal operating state. And these structural properties and conditions need to be periodically detected, but the prior art does not disclose this.

The present invention is to solve the problems of the prior art and has the following object.

Prior art 1: EP registration number EP00732451 (Franz Plasser, published on September 18, 1996) Working Vehicle for Carrying out Railway Work Prior Art 2: Patent Registration No. 10-1524981 (Unchang Mecatec Co., Ltd., 2015.06.02. Notice) Railway rail repair vehicle

An object of the present invention is to provide a device for measuring vibration characteristics of a motor car reducer capable of diagnosing the state of a motor car.

According to a preferred embodiment of the present invention, an apparatus for measuring vibration characteristics of a motor car reducer includes at least one vibration measurement module installed in a reducer of a motor car; a data acquisition unit coupled with at least one vibration measurement module; and an analysis unit that analyzes the information collected by the data collection unit, and each vibration measurement module is detachably installed in the reducer.

According to another preferred embodiment of the present invention, the vibration measurement module includes a three-axis acceleration sensor; a connector connected to the data collection unit; and a magnetic intermediate block.

According to another preferred embodiment of the present invention, at least one vibration measurement module is bolted to a fixing jig installed in the reducer.

According to another preferred embodiment of the present invention, the at least one vibration measurement module detects a gear mesh frequency, a side bands frequency, a gear resonant frequency and a gear mesh harmonic frequency.

The apparatus for measuring the vibration characteristics of the motor car reducer according to the present invention can accurately diagnose the condition of the motor car by detecting and analyzing various types of vibration generated in the motor car reducer. Through this, it is possible to develop a motor car suitable for the maintenance work of each line, and the motor car is maintained in a state in which maintenance work can be performed normally. The apparatus for measuring vibration characteristics according to the present invention can be applied to various types of motor cars.

1 shows an embodiment of a vibration characteristic measuring device according to the present invention.
2 shows another embodiment of a vibration characteristic measuring device according to the present invention.
3 illustrates an embodiment of a magnetic mediation block applied to the vibration characteristic measurement apparatus according to the present invention.
4a and 4b illustrate an embodiment of an operating method of a vibration characteristic measuring device.

Below, the present invention will be described in detail with reference to the embodiments presented in the accompanying drawings, but the embodiments are for a clear understanding of the present invention, and the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so repeated descriptions are not made unless necessary for understanding the invention, and well-known components are briefly described or omitted, but the present invention It should not be understood as being excluded from the embodiment of.

1 shows an embodiment of a vibration characteristic measuring device according to the present invention.

Referring to Figure 1, the vibration characteristic measuring device of the motor car reducer includes at least one vibration measurement module (13_1 to 13_N) installed in the reducers (12a, 12b) of the motor car; a data collection unit connected to at least one vibration measurement module (13_1 to 13_N); and an analysis unit that analyzes the information collected by the data collection unit, and each of the vibration measurement modules 13_1 to 13_N is detachably installed in the reduction gears 12a and 12b.

The motor car may be various types of vehicles operated by driving a motor, and may be, for example, a motor car used for maintenance and repair of railroad tracks. The power of the motor car is transmitted to the reduction gears 12a and 12b through the transmission 11, and the wheels 14a and 14b of the motor car may be connected to the reduction gears 12a and 12b. It is necessary to measure various types of vibrations generated in the reduction gears 12a and 12b for the development and condition diagnosis of the motor car, and it is advantageous to additionally measure the vibrations generated in the transmission 11. To this end, at least one vibration measuring module 13_1 to 13_N may be installed in each of the reducers 12a and 12b, and additionally, at least one vibration measuring module 13_1 to 13_N may be installed in the transmission 11. For example, a power transmission shaft may be connected to the transmission 11 or the reducers 12a and 12b, and the vibration measurement modules 13_1 to 13_N may be installed at the connecting portion, but is not limited thereto. Each of the vibration measurement modules 13_1 to 13_N may be detachably installed in the reduction gears 12a and 12b or the transmission 11. For example, the vibration measurement modules 13_1 to 13_N include a measurement body 21; a vibration detection sensor 22 disposed on the measuring body 21; a connector 23 connecting the vibration detection sensor 22 with the data collection unit; and a coupling unit 27 coupling the measuring body 21 to the fixing jig 25 . The fixing jig 25 may have a structure capable of fixing the vibration measurement modules 13_1 to 13_N while being firmly coupled to the surface MS of the reducer. The fixing jig 25 may have, for example, a rectangular parallelepiped shape and a structure in which a coupling hole 24 is formed in the center. The vibration measurement modules 13_1 to 13_N may be coupled to the fixing jig 25 in a bolt coupling structure, a groove fastening structure, or a magnetic coupling structure. As the coupling means 27 formed below the measuring body 21 is coupled to the coupling hole 24, the vibration measurement modules 13_1 to 13_N are coupled to the fixing jig 25, whereby each vibration measurement module 13_1 to 13_N) may be coupled to the reducers 12a and 12b or the transmission 12. The vibration measuring modules 13_1 to 13_N may be coupled to the fixing jig 25 by the magnetic mediation block 26 . The magnetic intermediary block 26 may be coupled to the coupling hole 24 of the fixing jig 25 by a bolt coupling method or a method similar thereto. The magnetic intermediate block 26 may be made of a metal material capable of being magnetized, and the fixing jig 25 may also be a magnetic metal body. A magnetic fastening hole may be formed in the magnetic intermediate block 26, and a niobium or similar permanent magnet may be disposed in the magnet fastening hole. The coupling means 27 may be inserted into a magnetic fastening hole or accommodated in a magnetic fastening hole to be magnetically coupled, or be bolted together to be magnetically coupled. The vibration measurement modules 13_1 to 13_N may be coupled to the fixing jig 25 in various ways and are not limited to the presented embodiment.

2 shows another embodiment of a vibration characteristic measuring device according to the present invention.

Referring to FIG. 2 , the measurement body 21 may be detachably coupled to the fixing jig 25 in a bolt coupling method. The fixing jig 25 may be permanently bonded (PW) to the reducer surface (MS) by, for example, welding. As a result, the fixing jig 25 can be integrated with the reducer. The measurement body 21 may be a polyhedron having a pentagonal cross section obtained by cutting one part of a rectangular parallelepiped as a whole. A vibration sensor such as a 3-axis acceleration sensor 22 may be disposed inside the measuring body 21, and the 3-axis acceleration sensor 22 is combined with various electronic elements, electronic circuits or microprocessors for processing detection information. It can be placed on an electronic board such as a printed circuit board. A connector 23 to which a connection means that is electrically connected to a data collection unit or an external data processing unit to enable data communication is connected to a cut portion of the measuring body 21 may be formed. By forming the connector 23 on the cut portion, the connector 23 is prevented from protruding out of the measuring body 21. The connector 23 may have a hollow cylinder structure, and may include at least one locking tab 231 for fixing the connecting means to be coupled. The locking tab 231 may operate in a push button manner, but is not limited thereto. The tightening unit 211 having a bolt structure coupled to the coupling hole 24 may be coupled to pass through the measuring body 21 in a vertical direction. The tightening unit 211 has a fastening portion 28 in which the tightening head is located on the upper surface of the measuring body 21 and the lower part protrudes to the outside of the lower part of the measuring body 21 and is fastened to the coupling hole 24. can form In this way, the vibration measuring module may be coupled to the fixing jig 25 in a bolt coupling method, and additionally, the measuring body 21 and the fixing jig 25 may be magnetically coupled. For example, niobium or similar permanent magnets may be disposed inside the fixing jig 25, and a magnetic sheet may be disposed on the lower surface of the measuring body 21. The magnetic sheet may have a structure in which surface contact is made with the upper surface of the fixing jig 25 while being adhered to the lower surface of the measuring body 21 . The magnetic coupling method may be formed together with or independently of the bolt coupling method and is not limited to the presented embodiment.

3 illustrates an embodiment of a magnetic mediation block applied to the vibration characteristic measurement apparatus according to the present invention.

Referring to FIG. 3, the magnetic intermediary block 26 may have a polygonal nut structure, and a magnetic fastening hole 31 coupled to the above-described coupling means (see 27 in FIG. 1) may be formed in the central portion. . In addition, a magnetic generating portion 32 may be formed below the magnetic intermediary block 26 . The magnetic generating portion 32 may be a cylindrical groove structure extending upward from a lower surface, and a pair of permanent magnets 33a and 33b may be disposed to face each other. Each of the pair of permanent magnets 33a and 33b may include an inclination guide portion formed at an end portion, and may be arranged to be separated from each other to form an insertion gap. The magnetic intermediary block 26 may be coupled to the fixing jig by the insertion gap. The magnetic generating portion 32 may be formed by a cylindrical bushing coupled to the magnetic intermediate block 26, and a pair of permanent magnets 33a and 33b may be coupled to the inner circumferential surface of the bushing. And a screw thread is formed on the circumferential surface of the bushing to be coupled to the fixing jig. The magnetism of the magnetic intermediary block 26 can be made in various ways and is not limited to the presented embodiment.

4a and 4b illustrate an embodiment of an operating method of a vibration characteristic measuring device.

Referring to Figure 4a, the operating method of the vibration characteristic measuring device is a step of determining the vibration characteristics of the deceleration device (S41); Selecting a vibration sensor location according to the determined vibration characteristics (S42); Setting vibration characteristic conditions to be detected (S43); Detecting driving vibration while the motor car is driven at various speeds (S44); transmitting and collecting the detected driving vibration to a data collection unit (S44); and analyzing the collected vibrations to diagnose the state of the motor car (S46).

The motor car may have the structure shown in 4b, and includes a traveling body 41; a plurality of wheel units 14a to 14k for moving the traveling body 41; a plurality of reduction gears 12a to 12m for adjusting the rotational speed while reducing the drive of the motor to each of the wheel units 14a to 14k; and at least one data collection recorder 42_1 to 42_M connected to each of the reduction gears 12a to 12m to enable data communication. The vibration characteristic to be measured may include a gear mesh frequency, a side bands frequency, a gear resonance frequency, a gear mesh harmonic frequency, a gear mesh harmonic frequency, or a frequency in the form of noise due to damage. Depending on the type of gear, appropriate vibration characteristics may be determined, and the size of the side band frequency band relative to the gear meshing frequency corresponding to the basic vibration characteristic in the vibration characteristics is a major factor representing the meshing characteristics of the gear, and the band frequency band is The larger it is, the more difficult it is for the gear to transmit power at a given rotational speed. Among the vibration frequencies, harmonics may be generated when gears are out of meshing, and in particular, the ratio of the amplitude of the first or second harmonic to the amplitude of the fundamental wave is a major factor in determining the meshing of gears. In this way, when the vibration characteristics to be measured according to the gear coupling structure or the connection structure are determined (P41), the position to which the vibration sensor is to be attached can be selected (PS42). As described above, the vibration sensor may be made of a structure of vibration measurement modules 13_1 to 13_N, and at least one vibration measurement module 13_1 to 13_N may be installed in each reducer 12a to 12m. Vibration sensors may be disposed in the vibration measurement modules 13_1 to 13_N, and the vibration measurement modules 13_1 to 13_N may be detachably coupled to the reducers 12a to 12m. Vibration measuring modules 13_1 to 13_N may be coupled to fixing jigs disposed on outer surfaces of the reducers 12a to 12m, and the fixing jigs may be formed at a portion where a power transmission shaft is connected. In this way, when the arrangement positions of the vibration sensor modules 13_1 to 13_N are selected (S41), vibration characteristics to be measured in each vibration sensor module 13_1 to 13_N may be selected (S43), each vibration sensor module (13_1 to 13_N) may have the same or different structures, and vibration characteristics to be measured may be selected according to the measurement positions of the electric sensor modules (13_1 to 13_N) (S43). When the vibration characteristics are determined, the vibration selected by each of the vibration sensor modules 13_1 to 13_N at each driving speed can be detected while the motor car is running at different driving speeds (S44), and the detected vibration is recorded in a data collection recorder. It can be transmitted to (42_1 to 42_M) (S45). The data collection recorders 42_1 to 42_M may be formed in various positions of the traveling body 41 and may include various electric or electronic components for processing detection information including a microprocessor. The data collection recorders 42_1 to 42_M may have an electronic board structure and may be electrically connected to each of the vibration sensor modules 13_1 to 13_N to enable data communication. It may also be detachably coupled to the traveling body 41 and may have a storage medium. Detection information classified and stored in the data collection recorders 42_1 to 42_M may be transmitted to the management server. The information transmitted from the data collection recorders 42_1 to 42_M in the management server is analyzed to diagnose the condition of the motor car in different driving conditions (S46).

Information detected and collected by the vibration characteristic measuring device may be processed in various ways and is not limited to the presented embodiment.

The apparatus for measuring the vibration characteristics of the motor car reducer according to the present invention can accurately diagnose the condition of the motor car by detecting and analyzing various types of vibration generated in the motor car reducer. Through this, it is possible to develop a motor car suitable for the maintenance work of each line, and maintain the state in which the motor car can be normally maintained. The apparatus for measuring vibration characteristics according to the present invention can be applied to various types of motor cars.

Although the present invention has been described in detail with reference to the presented embodiments above, those skilled in the art will be able to make various modifications and variations without departing from the technical spirit of the present invention with reference to the presented embodiments. . The present invention is not limited by these variations and modifications, but is limited only by the claims appended below.

11: transmission 12a, 12b: reducer
13_1 to 13_N: vibration measuring module 14a, 14b: wheel
21: measurement body 22: acceleration sensor
23: connector 24: coupling hole
25: fixed jig 26: magnetic intermediate block
27: coupling means 28: fastening site
31: magnetic fastening hole 32: magnetic generating part
33a, 33b: permanent magnet
231: locking tab 211: tightening unit

Claims (1)

At least one vibration measurement installed in the reducers 12a and 12b of the motor car and detachably coupled to the coupling hole 24 formed in the fixing jig 25 coupled to the surface of the reducers 12a and 12b by a bolt coupling method modules 13_1 to 13_N;
a data collection unit connected to at least one vibration measurement module (13_1 to 13_N);
an analysis unit that analyzes the information collected by the data collection unit;
Coupling means 27 for connecting the fixing jig 25 and the measuring body 21 of the vibration measuring modules 13_1 to 13_N;
It includes a magnetic intermediate block 26 for fixing the vibration measurement modules 13_1 to 13_N to the fixing jig 25,
A vibration detection sensor 22 is installed inside the measurement body 21, and the vibration detection sensor 22 is connected to the data collection unit by a connector 23 formed in the measurement body 21,
The magnetic intermediary block 26 has a cylindrical groove structure extending upward from the lower surface, and includes a pair of permanent magnets facing each other while forming an inclination guide portion at each end,
The magnitude ratio of the amplitude to the fundamental wave of the 1st or 2nd harmonic amplitude detecting the meshing state between the gears is detected by the vibration detection sensor 22,
The measuring body 21 has a rectangular parallelepiped shape, and is made of a polyhedron in which one part is cut to become a pentagon, and a connector 23 is formed by the cut portion of the measuring body 21, and the connector 23 has a hollow cylinder structure It includes at least one locking tab 231 for fixing the connecting means to be coupled, and the locking tab 231 is operated in a push button manner,
While the clamping head is located on the upper surface of the measuring body 21, the lower part of the measuring body 21 protrudes to the outside of the lower part of the measuring body 21 to form a fastening portion 28 fastened to the coupling hole 24 (21). ) Vibration characteristic measuring device of the motor car reducer, characterized in that it further comprises a tightening unit 211 of the bolt structure penetrating in the vertical direction.

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