KR20160005233A - Apparatus for testing noise and vibration of rotational machinery - Google Patents

Abstract

The present invention relates to a noise and vibration testing device for a rotating machine. Sand is charged in a pipe forming a bed. As a result, by absorbing noise and vibration which are delivered by the bed and blocking amplification due to resonance, noise and vibration which are delivered to the rotating machine and a noise and vibration measurement unit are reduced, and thus, noise and vibration of the rotating machine can be more accurately analyzed.

Description

TECHNICAL FIELD [0001] The present invention relates to a vibration testing apparatus,

The present invention relates to a noise vibration testing apparatus for a rotating machine, and more particularly, to a vibration testing apparatus for a rotating machine that can reduce noise transmitted to a rotating machine and a noise vibration measuring unit And more particularly, to a noise vibration testing apparatus for a rotating machine.

The automobile is driven by transmitting the power generated by burning the fuel in the engine to the wheel (wheel).

Between the engine and the wheel, a transmission and a shaft for power transmission (drive shaft, propeller shaft, axle shaft) are installed. Depending on the type of vehicle, transfer and rear axles are installed to distribute the power. The transfer and rear axle include differential gears.

The transmission is disposed on the output side of the engine to appropriately increase and decrease the number of revolutions and torque. The transfer distributes the power output from the transmission in the four-wheel drive vehicle to the front and rear wheels. The rear axle is transmitted from the rear- The power is distributed to the left / right wheel of the rear wheel.

As described above, there are rotation devices such as a transmission, a transfer, and a rear axle in a driving system of an automobile, and these are generally constructed by a structure in which a plurality of gears are interdigitated.

Therefore, during operation, the rotating machines cause noise and vibration due to inter-tooth impact and friction of the meshed gears. Since the noise and vibration performance of each rotating machine greatly affects the noise and vibration performance of the vehicle, it is necessary to accurately measure the noise and vibration characteristics of the rotating machines.

1, the apparatus for testing the noise and vibration of a rotating machine according to the related art comprises a bed 1 fixed to the floor F and an input motor 1 disposed on both sides of the upper surface of the bed 1, 2, an output motor 3, and a noise vibration measuring part (composed of sensors for noise and vibration measurement) 4 installed at the upper center of the bed 1.

A rotary device 5 (a shown example is a transmission) is provided at the center of the bed 1 and the input and output shafts of the rotary device 5 and the output motor 3 ).

The input motor 2 is provided with a driving force to operate the rotating machine 5, and the output motor 3 forms a load condition similar to the actual vehicle state through its output control.

In the state where the rotating machine 5 is operated as described above, the noise and vibration generated when the rotating machine 5 is operated are measured using the noise vibration measuring unit 4. [

The measured data may be transmitted to a computer device (not shown) and stored and displayed.

In the apparatus for testing the noise and vibration of a rotating machine according to the related art, since the inside of the bed 1 is empty, noise and vibration generated in the input and output motors 2 and 3 on both sides of the bed 1 And transmitted to the rotating device 5 and the noise vibration measuring part 4 in the amplified state with resonance and resonance so as to affect the operation of the rotating device 5 (interdental contact and friction between the internal gears) It was impossible to accurately measure the pure noise and vibration generated in the subject rotary apparatus 5 itself.

Therefore, the reliability of noise and vibration measurement values is deteriorated, and it is difficult to accurately determine whether the rotary device 5 is defective or not.

The above-described problems are similarly caused not only in the apparatus for testing noise and vibration of rotating equipment, but also in the apparatus for testing rotating equipment using a bed having many empty spaces therein.

Examples of a conventional rotating machine testing apparatus using a bed having an inner space as described above are disclosed in Korean Patent Publication Nos. 10-1283769 and 10-1395290.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to reduce the noise and vibration of the motors providing the driving force to the rotating machine or forming the load condition to be transmitted to the rotating machine and the noise- The present invention provides an apparatus for testing a noise and vibration of a rotating machine, which is capable of more accurately measuring noise and vibration of a rotating machine.

According to an aspect of the present invention, there is provided a bed comprising:

An input motor provided at one end of the bed, an output motor provided at the other end of the bed, a noise vibration measuring unit provided at an upper portion of the rotating device located at the center of the bed, An output shaft assembly connecting the rotating device and the output motor, and sand filled in a hollow space inside the bed.

The bed is characterized in that a plurality of tubes are combined in a lattice shape, and the inside of the tube is filled with sand.

And water is further injected into the inside of the tube.

An injection port is formed in the tubular body, and a cap for opening and closing the injection port is provided.

The injection port is protruded from a depression formed on the surface of the tubular body so that the cap does not protrude outside the tubular body when the cap is completely fastened to the injection port.

The injection ports are formed on mutually opposite surfaces of the tubular body, and the injection ports on both sides are formed to be spaced apart from each other in the longitudinal direction of the surface in opposite directions.

The bed includes a first bed on which a rotary device is disposed, a second bed disposed on one side of the first bed and provided with an input motor, and a third bed separated from the other side of the first bed and provided with an output motor .

The first bed, the second bed, and the third bed have an upper plate mounted on an upper portion of a grid-like structure having square tubular members coupled to each other, and the tubular body is filled with sand.

The input shaft assembly and the output shaft assembly each include a motor side connecting shaft assembly and a rotating device side connecting shaft assembly, and both motor side connecting shaft assemblies and rotating equipment side connecting shaft assemblies are connected by a constant velocity joint.

Wherein the input motor, the output motor, and the motor-side connecting shaft assembly are installed on a moving plate movably installed on the upper and lower plates of the second and third beds, And is installed on a moving plate provided.

A pair of stay bars are provided between the one moving plate of the first bed and the moving plate of the second bed and between the moving plate of the other bed and the moving plate of the third bed.

Wherein the stator includes a threaded rod inserted into both ends of the outer tube and the outer tube and screwed together and a connecting member connected to an end of the threaded rod and formed with a bolt projecting therebetween, Direction.

As described above, according to the present invention, sand is filled in the bed for supporting the rotating device, the noise vibration measuring unit, and the motor, thereby eliminating the empty space in the bed and increasing the weight of the bed, And resonance is prevented so that the amplification of noise and vibration in the bed is prevented. Therefore, external noises and vibrations transmitted to the rotating machine and the noise vibration measuring unit are largely reduced, so that the noise and vibration of the rotating machine can be more accurately measured.

Accordingly, reliability of noise and vibration measurement data is improved, and a rotary device having better noise vibration performance is developed based on this, and the noise and vibration performance of the vehicle can be improved.

In addition, an injection port is formed in the tubular body constituting the bed, so that sand can be injected or discharged into the tubular body. Accordingly, when assembling the tubular body, the hollow tubular body is used to facilitate the operation. When the bed in the assembled state is used, the inner portion of the tubular body can be filled with the sand to increase the weight. It can be easily transported by re-emptying.

Meanwhile, according to the present invention, the bed is divided into a noise vibration measuring part and a part where the rotating device is installed and a part where motors connected to the rotating device are installed, so that the vibration of the motor is not transmitted to the rotating device through the bed, It is possible to more accurately measure the noise and vibration of the vehicle.

In addition, since the shaft assemblies connecting the rotating device and the motor include the constant velocity joint, it is possible to allow the discrepancy of the axial alignment state between the rotating device and the motor, so that even when the axial alignment state is not correct, The occurrence of vibration can be prevented. Accordingly, it is possible to more accurately measure the noise and vibration of the rotating machine, and it is not necessary to spend much time in axis aligning operation between the rotating machine and the motor when setting the testing machine.

In addition, a stay bar is provided between a moving plate on which the rotating device-side connecting axis assembly is installed and a moving plate on which the motor and the motor-side connecting axis assembly are installed so as to minimize the misalignment of the axis- It is possible to prevent an increase in generation of noise and vibration during the test due to an increase in alignment error.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic block diagram of an apparatus for testing a noise and vibration of a rotating machine according to the prior art; FIG.
2 is a schematic block diagram of an apparatus for testing a noise and vibration of a rotating machine according to the present invention.
Fig. 3 is a partial plan view of the bed, which is a main constituent of the present invention. Fig.
Figure 4 is a front view of Figure 3;
5 is a front view and a side view of a tube body constituting the bed;
Fig. 6 is a view for explaining an operation of filling sand with a tubular body; Fig.
7 is a perspective view showing another embodiment of the tube.
8 is a schematic view showing an example of installation of an inlet of a tubular body.
Fig. 9 is an installation state of a fixing bracket for fixing a bed to a floor; Fig.
10 is a configuration diagram of an apparatus for testing a noise vibration of a rotating machine in which a bed is separated.
11 is an installation view of a constant velocity joint which is a constitution of an input shaft assembly and an output shaft assembly.
Fig. 12 is an installation state of a stay bar. Fig.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The thicknesses of the lines and the sizes of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an apparatus and method for testing a noise level of a rotating machine using a bed 1 fixed to a floor F and an input motor 40 installed at one end of the bed 1, An output motor 50 provided at the other end of the bed 1, a noise vibration measuring unit 60 provided at an upper portion of the rotating device 5 located at the center of the bed 1, And an output shaft assembly 200 connecting the rotary device 5 and the output motor 50. The input shaft assembly 100 connects the input device 40 and the input motor 40 to the output shaft assembly 200, S).

3 to 5, the bed 1 is formed by combining a plurality of tubes 11, and an upper plate 12 is mounted on the upper portion.

The input motor 40 provides a driving force for driving the rotating machine 5 and the output motor 50 forms a load in the direction opposite to the rotating direction of the output shaft of the rotating machine 5 through the output control, To form similar load conditions.

The noise and vibration measurement unit 60 includes a frame that crosses the upper portion of the rotating device 5 positioned at the measurement position, a noise measurement sensor mounted on the frame, and a vibration measurement sensor.

As described above, the bed 1 is configured by combining a plurality of tubes 11.

Fig. 3 is a partial plan view of the bed 1, and Fig. 4 is a partial front view of the bed. As shown in the figure, the bed 1 has a lattice shape in which a plurality of tubes 11 are staggered at right angles to each other. The tubular bodies 11 have different lengths (the lengths of the horizontal member, the vertical member, and the vertical member are different from each other) depending on the position in which they are disposed, and are configured in a grid shape in both the horizontal direction and the vertical direction. Each tube 11 is mutually fixed by bolting or welding.

The upper plate 12 is mounted on the upper surface of the mutually coupled tube 11 structure. The upper plate 12 is bolted or welded to the uppermost tubular body 11.

The tubular body 11 has a rectangular cross-section as shown in Fig. 5, and its interior is empty. It is possible to increase the weight of the tubular body 11 to increase the influence of vibration transmitted to the input shaft assembly 100 and the output shaft assembly 200 that connects the input motor 40 and the output motor 50 to the rotating machine 5, The inside of the tube 11 is filled with the sand S. Water may be injected instead of sand (S) as a material for increasing the weight of the tubular body (11). In other words, to increase the weight of the bed 1, a material having a high specific gravity and easy to be injected into and discharged from the tubular body 11 may be used, and it is not necessarily limited to sand or water.

6, the sand S is injected into one opened end of the tubular body 11, and after the injection is completed, the side plate 11a covering the opening is welded to the tubular body 11, (Not shown).

On the other hand, the injection port 11c may be formed in the tubular body 11 as shown in FIG. 7 so that both the injection and the discharge of the sand S are possible. That is, the injection of sand into the inside of the tubular body 11 and the discharge of the outside of the tubular body 11 are both possible through the injection port 11c.

A circular depression 11b is formed at one side of the tubular body 11 so as to be concave at the lower portion of the surface thereof and an injection port 11c communicating with the inner space of the tubular body 11 is formed on the bottom surface of the depressed portion 11b Respectively. The injection port 11c is provided with a cap 11d for opening and closing it. A male screw is formed on the outer circumferential surface of the injection port 11c and a female screw is formed on the inner circumferential surface of the cap 11d so that the cap 11d can be opened and closed on the injection port 11c by a screw fastening method.

The cap 11d does not protrude higher than the surface of the tube 11 at the portion where the injection port 11c is formed when the cap 11d is completely mounted on the injection port 11c. That is, the cap 11d, which is completely mounted on the injection port 11c, is located in the inner space of the depression 11b and is not protruded to the outside, so that the tubular body 11 is not disturbed during handling, It does not.

A tool groove 11e is formed on the outer peripheral surface of the cap 11d in the vertical direction at regular intervals. Although the tool groove 11e having a rectangular cross-sectional shape is shown in the drawing, it is only required that the cap 11d can be strongly held when the cap 11d is rotated using a special tool. For example, a tool groove 11e having various cross-sectional shapes such as a trapezoidal section, a triangular section, and a semicircular section can be formed.

As shown in Fig. 8, a plurality of injection ports 11c may be formed. It goes without saying that the cap 11d is provided for each injection port 11c and the cap 11d does not protrude beyond the surface of the tubular body 11 in a state where the cap 11d is completely mounted on the injection port 11c.

When the length of the tubular body 11 is long, two or more injection ports 11c may be formed on one surface. However, as shown in FIG. 1, it is preferable that a total of two injection ports 11c are formed on the upper surface and one on the lower surface. It is preferable that the injection port 11c on the upper surface and the injection port 11c on the lower surface are formed on the side opposite to each other. That is, the injection ports 11c are formed on opposite surfaces of the tube body 11, and the both-side injection ports 11c are formed on the respective formation surfaces so as to be spaced away from each other in the longitudinal direction of the surface.

When the injection port 11c is formed on the opposite side as described above, even if the injection port 11c, in which the tubular body 11 is welded and assembled for the first time, can not be positioned downward (in a direction toward the paper) The sand S can be discharged through the other injection port 11c. In other words, since the two injection ports 11c can be used as the injection port or the discharge port, the degree of freedom of the sand injection and discharge operation of the tubular body 11 is improved.

The bed 1 is fixed to the floor F via a fixing bracket 14 and a fixing plate 15 as shown in Figs. 3, 4 and 9.

The fixing bracket 14 is a flat plate to be welded to the lower side of the side of the bed 1, and the reinforcing plate 14a is provided vertically on both sides thereof to reinforce the strength. The reinforcing plate 14a is welded to the side of the fixing bracket 14 and the bed 1. [

The fixing plate 15 is fixed to the floor F via a bolt member 17a fixed to the floor F and a nut 17b fastened to the bottom F as a flat plate having a width larger than the fixing bracket 14.

The fixing bracket 14 is fixed to the upper surface of the fixing plate 15 by a plurality of bolt members 16a and nuts 16b. At this time, a double nut is used for the nut 16b to prevent the nut from loosening.

A cushioning material 18 made of rubber, urethane, wood or the like may be provided between the fixing bracket 14 and the fixing plate 15. The cushioning material 18 improves the close contact between the stationary bracket 14 and the fixing plate 15 to stabilize the bed more stably and absorb vibration and shock generated by the operation of the motor do.

10, the bed 1 of the apparatus for testing the noise and vibration of a rotating machine according to the present invention includes a first bed 10, a second bed 20, 3 bed (30).

Each of the beds 10, 20 and 30 is formed by combining a plurality of tubes 11, 21 and 31, and upper plates 12, 22 and 32 are mounted on the upper tubes. Although the concrete shapes and dimensions (height, width, and the like) of the three beds 10, 20 and 30 are different from each other, the combination of the tubular bodies 11, 21 and 31 and the configuration including the upper plates 12, The basic configuration is the same.

The upper plates 12, 22 and 32 of the beds 10, 20 and 30 are provided with moving plates 13a, 13b, 23 and 33 which can be adjusted and fixed.

The input motor 40 is mounted on a moving plate 23 provided on the upper plate 22 of the second bed 20.

The output motor 50 is mounted on a moving plate 33 provided on the upper plate 32 of the third bed 30.

The noise and vibration measurement unit 60 includes a frame transverse to the upper portion of the rotary device 5 positioned at the measurement position, and a noise measurement sensor and a vibration measurement sensor mounted on the frame.

The frame of the noise and vibration measuring unit 60 may be provided with a fixed unit for fixing the rotating equipment 5 by pressing the upper part of the rotating equipment 5. [

The input shaft assembly 100 includes a motor side connection shaft assembly 110 connected to the rotation shaft of the input motor 40, a rotation device side connection shaft assembly 120 connected to the input shaft of the rotation device 5, And a constant velocity joint 130 connecting between the rotary device side connecting shaft assembly 120 and the rotating device side connecting shaft assembly 120.

The motor side connection shaft assembly 110 is installed on the moving plate 23 provided on the upper plate 22 of the second bed 20 and the rotating device side connection axis assembly 120 is mounted on the upper plate 12 of the first bed 10, (In the direction of the input side of the rotating machine 5 to the right in the figure) provided on the moving plate 12.

The output shaft assembly 200 includes a motor side connection shaft assembly 210 connected to the rotation shaft of the output motor 50, a rotation device side connection shaft assembly 220 connected to the output shaft of the rotation device 5, And a constant velocity joint 230 connecting between the rotary device side connecting shaft assembly 220 and the rotary device side connecting shaft assembly 220.

The motor side connecting shaft assembly 210 is installed on a moving plate 33 provided on the upper plate 32 of the third bed 30 and the rotating device side connecting axis assembly 220 is mounted on the upper plate 32 of the first bed 10, (In the direction of the output side of the rotating machine 5 to the left in the figure) provided on the moving plate 12.

Since the constructions of both constant-velocity joints 130 and 230 are the same, only the constant velocity joint 130 constituting the input shaft assembly 100 will be described.

11, the constant velocity joint 130 includes a shaft 131, an inner ring 132 mounted on both ends of the shaft 131, an outer ring 133 surrounding the inner ring 132, an inner ring 132, And a ball 134 interposed between the outer ring 133. The balls 134 are formed in the axial grooves formed on the inner and outer rings 132 and 133, respectively, on the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring, and are formed at regular intervals in the circumferential direction. So that the inner ring 132 and the outer ring 133 are restrained in the rotating direction of the shaft 131 and the relative rotation of a predetermined amount in the radial direction around the shaft 131 is possible.

The constant velocity joint 130 of the input shaft assembly 100 has the outer ring 133 at both ends of the shaft 131 connected to the motor side connecting shaft assembly 110 via the coupling 140, Side connecting shaft assembly 120. [0035]

The constant velocity joint 230 of the output shaft assembly 200 is connected to the motor side connection shaft assembly 210 via the coupling at both ends of the outer ring at both ends of the constant velocity joint 230 and the other side is connected to the rotary device side connection shaft assembly 220 do.

Therefore, the motor-side connection shaft assemblies 110 and 210 and the rotary-device-side connection shaft assemblies 120 and 220 of the input shaft assembly 100 and the output shaft assembly 200 are connected to both ends of the constant velocity joints 130 and 230, By receiving the mismatch amount of the axial alignment due to the relative motion between the inner and outer rings, the power can be transmitted without loss even when the axes are not aligned.

Meanwhile, the moving plates of the mutually spaced beds can be connected to the stay bars 300 and 400.

The moving plate 13a of the first bed 10 and the moving plate 23 of the second bed 20 and the moving plate 13b of the first bed 10 and the moving plate 13b of the third bed 30 33 are connected by stabs 300, 400 (see Fig. 10).

Only the stay bar 300 connecting the first and second moving plates 13a and 23 of the first bed 10 and the second bed 20 will be described.

12, the stay bar 300 includes an outer barrel 310, a threaded bar 320 inserted and threaded at both ends of the outer barrel 310, and a connecting rod 320 connected to the end of the barrel rod 320, Member 330, and the helical directions of both threaded rods 320 are opposite to each other. It is needless to say that the helical direction of the female screw formed on the inner circumferential surface of the outer cylinder 310 is formed opposite to each other.

The stay bar 300 connects the moving plate 13a of the first bed 10 and the moving plate 23 of the second bed 20 to each other.

Bolts 331 protrude from the end of the connecting member 330 of the stay bar 300 and are fixed to the moving plate 13a of the first bed 10 and the moving plate 23 of the second bed 20, A bracket 340 is mounted, and a through hole is formed in the wall of the mounting bracket 340. The bolt 331 of the connecting member 330 is inserted through the through hole and the nut 332 is fastened to the end of the bolt 331 to fix the connecting member 330 to the mounting bracket 340 .

The stabs 300 and 400 are installed on the first and second beds 10 and 20 after the positions of the beds 10 and 20 and the moving plates 13a and 13b and 23 and 33 are set, 13a and 23 and between the moving plates 13b and 33 of the first and second beds 10 and 30 as described above.

Since the insertion depth or the protruding length of the bosses 320 can be adjusted at the end of the outer cylinder 310 by turning the outer cylinder 310, the two moving plates 13a and 23, 13b and 33 connected to each other can be firmly fixed to each other It is possible to hold it.

In the front view of the test apparatus shown in FIG. 10, two stay bars 300 and 400 are shown on both sides of the left and right sides, but in reality, four stay bars are provided, two on each side. In other words, only two front stays are shown in Fig.

Now, the operation and effects of the noise and vibration testing apparatus of the rotating machine according to the present invention will be described.

The input shaft assembly 100 connected to the input motor 40 is connected to the input shaft of the rotary device 5 and the output shaft of the rotary device 5 is connected to the input shaft of the rotary device 5, An output shaft assembly 200 connected to the motor 50 is connected.

The connection of the input shaft assembly 100 and the input shaft of the rotating machine 5 and the output shaft of the output shaft assembly 200 to the output shaft of the rotating machine 5 is performed by adjusting the positions of the moving plates 13a, 13b, 23 and 33, The moving plates 13a, 13b, 23 and 33 are fixed. (In the case of the integrated bed 1 not separated, the moving plates 13a, 13b, 23 , 33) are installed.

When the test preparation is completed, the input motor 40 is operated to transmit the rotational force through the input shaft assembly 100 to operate the rotating machine 5, and the output motor 50 to operate the rotating machine 5 By providing an appropriate reaction force as opposed to the direction of rotation, a load condition similar to the actual vehicle condition is formed. At this time, the input motor 40, the input shaft assembly 100, the rotating machine 5, the output shaft assembly 200, and the output motor 50 all rotate in the same direction.

The noise and vibration generated in the rotary device 5 are measured using the noise measurement sensor and the vibration measurement sensor of the noise vibration measurement unit 60 while maintaining the operating state of the rotary device 5. [ The measured data is transferred to a computer device (including a display device) not shown and stored and displayed.

The bed (1) is structurally very stable because the rectangular tube bodies (11) are constituted by being coupled to each other in a lattice shape.

In the bed 1, the inside of the tubular body 11 is filled with sand S. The resonance of the vibration generated from the motor, the shaft and the rotating machine does not occur and the vibration transmitted to the tube body 11 by the sand S does not occur due to the absence of the empty space in the tube body 11 due to the filling of the sand (S) The influence of the external vibration transmitted to the rotating machine 5 is minimized by preventing resonance with the tubular structure 11, that is, the circle (motor, shaft, rotating machine) of the bed 1.

Since the sand S has a high weight (in the case of dry sand) of about 1,600 to 1,700 kg / m3, if the inside of all the tubes 11 constituting the bed 1 is filled with sand, The weight is greatly increased. As the weight increases, the possibility of resonance to external vibration is reduced, so that the vibration amount of the bed 1 is minimized despite the operation of the circulating circles.

When the water is injected together with the pores of the dried sand, the weight increase effect can be doubled. However, since it is difficult to discharge the sand in the tubular body 11 as the water content increases, it is preferable to consider this.

By filling the sand as described above to eliminate the void space in the bed 1 and to increase the weight of the bed 1, it is possible to reduce the weight of the bed 1 due to vibration generated during operation of the rotating machine 5, the input motor 40, and the output motor 50 Less affected. That is, the vibration of the bed 1 due to the vibrations generated when the mounted devices are operated is suppressed, so that the bed 1 can stably rotate the rotating device 5, the input motor 40, and the output motor 50 And the devices mounted thereon can smoothly operate in a state in which the influence of vibration is minimized, so that the noise vibration characteristics of the rotating machine 5 can be more accurately measured and judged.

Also, for the same reason, since the vibration transmitted to the noise vibration measuring unit 60 is reduced, the measurement sensors are not affected by the external vibration, so that the noise vibration of the rotating device 5 can be more accurately measured.

Meanwhile, an inlet 11c may be formed in the tube 11 constituting the bed 1. Sand, water, or other filler can be injected into the interior of the tubular body 11 or discharged outside the tubular body 11 through the inlet port 11c.

The injection port 11c is provided with a cap 11d which can be opened and closed in a screwed manner so that the injection port 11c can be opened and closed.

The injection port 11c and the cap 11d are not projected to the outside of the surface of the tubular body 11 in the fully engaged state so that the injection port 11c and the cap 11d are not disturbed when the tubular body 11 is handled or engaged .

A plurality of tool grooves 11e are formed on the outer peripheral surface of the cap 11d so that the cap 11d can be strongly tightened and can be easily released.

In addition, the injection ports 11c may be formed on the mutually facing surfaces of the tubular body 11, respectively. Accordingly, if it is difficult to open any one of the injection ports 11c to discharge the sand filled therein, the sand can be discharged through the remaining injection port 11c, thereby improving the convenience of the sand injection and discharge operations. Such an effect can be doubled by forming the opposite side injection ports 11c in the opposite directions along the longitudinal direction of the formation surface.

The effect of the sand filling of the tubular body 11 is also generated when the bed 1 is divided into the first bed 10, the second bed 20 and the third bed 30.

In the meantime, according to the present invention, a first bed 10 provided with a rotary device 5, a second bed 20 provided with an input motor 40, and a third bed 30 provided with an output motor 50 The vibration of the second bed 20 and the third bed 30 is not transmitted to the first bed 40 because the first bed 40 and the second bed 20 are separated from each other.

The second bed 20 and the third bed 30 provided with the input motors 40 and the output motors 50 as vibration sources are separated from the first bed 10 so that the input motors 40 and the output The vibration generated in the motor 50 is prevented from being transmitted to the first bed 10 through the second bed 20 and the third bed 30. [

Therefore, since the vibration is not transmitted to the rotating device 5 and the noise vibration measuring unit 60 through the first bed 10, the vibration is transmitted from the input motor 40 and the output motor 50 for providing the driving force and forming the load It is possible to more accurately measure the noise and vibration generated by the operation of the rotating machine 5 itself by greatly reducing the vibration (vibration through the shaft connection exists).

Therefore, it is possible to more accurately determine whether the rotating machine 5 is normal or defective, and it is helpful to find out the cause of the defective machine and to improve it.

As described above, the noise vibration performance of the rotating machine 5 can be accurately determined and improved, thereby improving the noise and vibration performance of the vehicle.

In the meantime, since the bed 1 is separated from the bed, the present invention can cause an error in the installation position when the beds 10, 20, and 30 are installed, so that the axis alignment state of the connection shaft assemblies may be poor. Such a misalignment of the axially aligned state may occur due to an error in the fixed position after setting the position of each of the moving plates 13a, 13b, 23, and 33 even when the respective beds 10, 20, have.

However, according to the present invention, as described above, the portions corresponding to the spaces between the separated beds 10, 20 and 30, that is, the input shaft assembly 100 and the motor side connecting shaft assembly 110, Speed joints 130 and 140 are provided between the motor-side connecting shaft assembly 210 and the rotating-device-side connecting shaft assembly 220 in the output shaft assembly 200 and the operation of the constant velocity joints 130 and 140, respectively, It is possible to accommodate the deviation of the axial alignment state within the range.

Therefore, even when the axis alignment state of the connection axis assemblies is not accurate, the driving force can be transmitted and the load condition can be formed while minimizing the occurrence of the noise vibration generated in the connection axis assembly. This means that the external factors affecting the noise vibration measurement of the rotary device 5 are reduced, and it is understood that the noise and vibration of the rotary device 5 can be more accurately measured.

On the other hand, when the test is repeatedly performed for a long period of time, the axis alignment state, which was set in a good state due to various causes (wear of the component, weakening of the component fastening force, etc.) may become poor.

In order to prevent this, the present invention connects the moving plates 13a and 23, 13b and 33 with the stay bars 300 and 400 as described above.

The stay bars 300 and 400 include a moving plate 13a of the first bed 10 provided with the motor side connecting axis assemblies 110 and 210 connected to the constant velocity joints 130 and 230 and a rotating device side connecting axis assembly 120 and 220 respectively, The moving plate 13b of the first bed 10 and the moving plate 33 of the third bed 30 are connected to each other between the moving plates 23 of the first and second beds 20, 23, 13b and 33 are constrained to each other.

In other words, since both side portions of the moving plates 13a and 23, 13b and 33, which are provided on the bed and are not changed in height, are mutually connected by the stay bars 300 and 400, It is possible to prevent the axial alignment state from becoming unchanged according to the progress of the test and the use period of the test apparatus, since the relative position between the axes 13a and 23, 13b and 33 does not change. Therefore, the noise vibration performance of the rotating machine 5 can be more accurately measured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

1: Bed 5: Rotating device
10: first bed 20: second bed
30: Third bed 11, 21, 31: Tubular body
12, 22, 32: upper plates 13a, 13b, 23, 33:
11c: Inlet port 11d: Cap
14: Fixing bracket 15: Fixing plate
40: Input motor 50: Output motor
100: input shaft assembly 200: output shaft assembly
110, 210: Motor side connection axis assembly 120, 220: Rotation device side connection axis assembly
130,230: Constant velocity joint 60: Noise and vibration measurement unit
F: Bottom S: Sand

Claims (12)

A bed fixed to the floor,
An input motor provided at one end of the bed,
An output motor provided at the other end of the bed,
A noise vibration measuring unit provided at an upper portion of the rotating device located at the center of the bed,
An input shaft assembly connecting the rotary device and the input motor,
An output shaft assembly connecting the rotating device and the output motor,
Sand filled in the empty space inside the bed
And a noise vibration testing device for rotating the device. The method according to claim 1,
Wherein the bed is formed by combining a plurality of tubes in a lattice shape, and the inside of the tube is filled with sand. The method of claim 2,
Wherein water is further injected into the inside of the tubular body. The method of claim 2,
Wherein an inlet is formed in the tubular body and a cap for opening and closing the inlet is provided in the injection port. The method of claim 4,
Wherein the injection port is protruded from a depression formed on a surface of the tubular body so that the cap does not protrude outside the tubular body when the cap is completely fastened to the injection port. The method of claim 4,
Wherein the injection ports are formed on mutually opposite surfaces of the tubular body, and the injection ports on both sides are spaced apart from each other in the longitudinal direction of the surface in opposite directions. The method according to claim 1,
The bed includes a first bed on which a rotary device is disposed, a second bed disposed on one side of the first bed and provided with an input motor, a third bed separated from the other side of the first bed and provided with an output motor Wherein the noise-vibration testing device comprises: The method of claim 7,
Wherein the first bed, the second bed, and the third bed are constructed such that an upper plate is mounted on an upper part of a lattice structure in which a quadrangular tubular body is mutually coupled, and the inside of the tubular body is filled with sand, Test equipment. The method of claim 7,
Wherein the input shaft assembly and the output shaft assembly each include a motor side connecting shaft assembly and a rotating device side connecting shaft assembly, and both motor side connecting shaft assemblies and rotating device side connecting shaft assemblies are connected by a constant velocity joint. Noise and Vibration Test Equipment. The method of claim 9,
Wherein the input motor, the output motor, and the motor-side connecting shaft assembly are installed on a moving plate movably installed on the upper and lower plates of the second and third beds, And the vibration plate is mounted on a moving plate provided on the moving plate. The method of claim 10,
A pair of stay bars are provided between the one moving plate of the first bed and the moving plate of the second bed and between the moving plate of the other bed and the moving plate of the third bed, Test equipment. The method of claim 11,
Wherein the stator includes a threaded rod inserted into both ends of the outer tube and the outer tube and screwed together and a connecting member connected to an end of the threaded rod and formed with a bolt projecting therebetween, Direction of the rotating machine.

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