KR101661486B1 - Apparatus having separate bed for testing noise and vibration of rotational machinery - Google Patents

Abstract

The present invention relates to an apparatus and a method for testing a noise-free vibration of a bed detachable rotating machine, wherein a rotating device, an input motor, and a bed on which an output motor is installed are separated from each other to block vibrations transmitted to the rotating device and the noise- The noise vibration of the device can be measured more accurately.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vibration isolation device,

[0001] The present invention relates to a noise-isolation vibration testing apparatus for a bed detachable rotating machine, and more particularly, to a vibration isolation testing apparatus for a vibration isolating type rotating machine which is capable of more accurately measuring noise vibrations of a rotating machine by blocking transmission of vibration of a driving source To a noise vibration testing apparatus for a bed detachable 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 conventional rotating machine noise and vibration testing apparatus, since the bed 1 is integrally formed, the vibrations generated in the input and output motors 2 and 3 are transmitted to the rotating machine 5 through the bed 1, And this vibration affects the operation of the rotary device 5 (interdental contact and friction of the internal gears), so that it is impossible to measure the pure noise and vibration generated in the rotary device 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 caused not only by the noise and vibration testing apparatus of the non-rotating apparatus but also by the rotating apparatus testing apparatus using the integrated bed.

Examples of a conventional rotating machine testing apparatus using the integral type bed as described above are disclosed in Korean Patent Publication Nos. 10-1283769 and 10-1395290.

SUMMARY OF THE INVENTION The present invention is conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a rotating device capable of preventing vibrations of devices such as a motor providing a driving force to a rotating device or forming a load condition from being transmitted to a rotating device to be tested, The present invention has been made in view of the above problems, and it is an object of the present invention to provide a noise vibration testing apparatus for a bed detachable rotating machine capable of more accurately performing noise and vibration measurement.

According to an aspect of the present invention, there is provided an apparatus for rotating a bed comprising a first bed provided with a rotating device, a second bed spaced apart from one side of the first bed, a third bed spaced apart from the other side of the first bed, An input motor installed in the second bed, an output motor installed in the third bed, a noise vibration measuring unit provided in an upper portion of the rotating device of the first bed, an input shaft assembly connecting the rotating device and the input motor, And an output shaft assembly connecting the rotating device and the output motor.

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, It is installed on the installed moving plate.

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 other moving plate of the first 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.

The first bed, the second bed, and the third bed are configured such that an upper plate is mounted on an upper portion of a grid-like structure in which square tubes are coupled to each other.

The inside of the tubular body is filled with sand.

Water may be further injected into the interior of the tubular body.

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 and the cap does not protrude outside the surface of the tubular body when the cap is completely fastened to the injection port.

The injection ports are respectively formed on mutually opposite surfaces of the tubular body, and the both-side injection ports are formed so as to be spaced from each other in opposite directions along the longitudinal direction of the surface.

As described above, according to the present invention, the bed on which the rotary device to be measured is installed and the bed on which the motors connected to the rotary device are installed are separated and the vibration of the motor is not transmitted to the rotary device through the bed, And the vibration can be measured more accurately.

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.

Further, since the shafts connected to the rotating machine and the motor are connected to each other by the constant velocity joint, it is possible to allow the inconsistency of the shaft alignment state between the rotating machine and the motor, so that even when the shaft alignment state is not correct, Can be prevented. Therefore, when the test apparatus is set, it takes much time to align the axis between the rotating machine and the motor.

Further, 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 the occurrence of noise and vibration during the test from being increased due to an increase in the state error.

In addition, the present invention is characterized in that sand is filled in the tubular body constituting each bed supporting the rotating device and the motor, the empty space in the bed is lost, and the weight of the bed is increased to absorb the vibration and prevent the resonance, . Therefore, the influence of the external vibration transmitted to the rotating device and the noise vibration measuring part is minimized, so that the noise and vibration of the rotating device can be more accurately measured.

On the other hand, 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.

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 block diagram of an apparatus for testing a noise isolation vibration of a bed detachable rotating machine according to the present invention.
Fig. 3 is an installation view of a constant velocity joint, which is a constitution of the present invention. Fig.
Fig. 4 is an installation view of a stay bar which is a constitution of the present invention. Fig.
5 is a plan view of a bed that is an embodiment of the present invention.
6 is a front view of the bed;
7 is a view showing an installation state of a fixing bracket for fixing a bed to a floor;
8 is a front view and a side view of a tube body constituting the bed;
9 is a view for explaining an operation of filling a tubular body with sand.
10 is a perspective view showing still another embodiment of a tubular body.
Fig. 11 is a schematic view showing an example of installing an inlet of a tubular body. 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.

FIG. 2 is a block diagram of an apparatus for testing a noise-isolation type vibration isolation device according to the present invention. FIG. 2 is a perspective view of a vibration isolator of a bed- A third bed 30 disposed on the opposite side of the second bed 20 of the first bed 10; an input motor 40 installed on the second bed 20; An output motor 50 provided on the third bed 30, a noise vibration measuring unit 60 provided on the rotating device 5 of the first bed 10, a rotating device 5 and an input motor 40 And an output shaft assembly 200 connecting the rotary device 5 and the output motor 50. The input shaft assembly 100 is connected to the input shaft assembly 100,

As described above, the bed of the apparatus for noise vibration testing of the bed detachable rotating machine according to the present invention includes the first bed 10, the second bed 20, and the third bed 30, which are independently spaced apart from each other by a predetermined distance do.

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.

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 provides a driving force for driving the rotary device 5 and is mounted on a moving plate 23 provided on the upper plate 22 of the second bed 20.

The output motor 50 forms a load similar to the actual vehicle condition by forming a load in the direction opposite to the rotation direction of the output shaft of the rotating machine 5 through the adjustment of the output. And is mounted on a moving plate 33 provided on the moving plate 33.

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.

3, 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. 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.

4, the stay bar 300 includes an outer barrel 310, a threaded bar 320 inserted into both ends of the outer barrel 310 and screwed thereto, 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.

2, two stay bars 300 and 400 are shown on both left and right sides of the test apparatus, but in reality, four stay bars are provided in total, two each on the left and right sides. That is, only the two stay bars in the front side are shown in Fig.

Meanwhile, as described above, each of the beds 10, 20, and 30 is formed by combining a plurality of tubes 11, 21, and 31. Although the concrete shapes and dimensions (height, width, etc.) of the three beds 10, 20 and 30 are different from each other, the basic structures 11, 21 and 31 are combined and the basic structure including the top plates 12, The second bed 20 will be described as an example and the description of the remaining beds 10 and 30 will not be repeated.

FIG. 5 is a plan view of the second bed, and FIG. 6 is a front view of the second bed. As shown in the drawing, the second bed 20 has a grid shape in which a plurality of tubes 21 are staggered at right angles to each other. The tubes 21 have different lengths 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 21 is mutually fixed by bolting or welding.

An upper plate 22 is mounted on the upper surface of the mutually coupled tube 21 structure. The upper plate 22 is bolted or welded to the uppermost tube body 21. A moving plate 23 is movably provided on an upper portion of the upper plate 22 via a guide rail.

The second bed 20 is fixed to the floor F via a fixing bracket 24 and a fixing plate 25 as shown in Figures 5-7. .

The fixing bracket 24 is a flat plate to be welded to the lower side of the second bed 20, and the reinforcing plate 24a is vertically installed on both sides thereof to reinforce the strength. The reinforcing plate 24a is welded to the side surfaces of the fixing bracket 24 and the second bed 20.

The fixing plate 25 is fixed to the floor F via a bolt member 27a fixed to the floor F and a nut 27b fastened to the bottom F as a flat plate having a width larger than the fixing bracket 24.

The fixing bracket 24 is fixed to the upper surface of the fixing plate 25 by a plurality of bolt members 26a and a nut 26b. At this time, a double nut is used for the nut 26b to prevent the nut from loosening.

A cushioning material 28 made of rubber, urethane, wood or the like may be provided between the fixing bracket 24 and the fixing plate 25. The cushioning material 28 improves the close contact state between the stationary bracket 24 and the fixing plate 25 so that the bed can be more stably fixed and absorbs vibration and shock generated by the motor operation do.

The tubular body 21 has a rectangular cross-section as shown in Fig. 8, and its interior is empty. The inside of the tubular body 21 may be filled with sand S to increase the weight of the tubular body 21 and reduce the influence of vibration transmitted when the motor and the connecting shaft assemblies are rotated. Water may be injected instead of sand (S) as a material for increasing the weight of the tube body (21).

9, the sidewall 21a covering the opening is welded to the inside of the tubular body 21 after the filling is completed, Lt; RTI ID = 0.0 > permanently < / RTI >

On the other hand, the injection port 21c may be formed in the tubular body 21 as shown in FIG. 10 so that the injection and discharge of the sand S can be performed. That is, it is possible to inject sand into the tubular body 21 through the injection port 21c and to discharge the sand to the outside of the tubular body 21.

A circular depression 21b is formed on one side surface of the tubular body 21 so as to be concave below the surface and an injection port 21c communicating with the inner space of the tubular body 21 is formed on the bottom surface of the depressed portion 21b Respectively. The injection port 21c is provided with a cap 21d for opening and closing it. A male screw is formed on the outer peripheral surface of the injection port 21c and a female screw is formed on the inner peripheral surface of the cap 21d so that the cap 21d can be screwed into the injection port 21c.

The cap 21d does not protrude higher than the surface of the tube 21 at the portion where the injection port 21c is formed when the cap 21d is completely mounted on the injection port 21c. That is, the cap 21d, which is completely mounted on the injection port 21c, is located in the inner space of the depression 21b and is not protruded to the outside, so that the tube 21 is prevented from being disturbed during handling, It does not.

On the outer peripheral surface of the cap 21d, tool grooves 21e are formed in the vertical direction at regular intervals. Although the tool groove 21e having a rectangular cross-sectional shape is shown in the figure, it is only required that the cap 21d can be strongly held when the cap 21d is rotated using a special tool. For example, tool grooves 21e having various cross-sectional shapes such as a trapezoidal section, a triangular section, and a semicircular section can be formed.

As shown in Fig. 11, a plurality of injection ports 21c may be formed. It goes without saying that the cap 21d is provided for each injection port 21c and the cap 21d does not protrude beyond the surface of the tube 21 in a state where the cap 21d is completely mounted on the injection port 21c.

When the length of the tubular body 21 is long, two or more injection ports 21c may be formed on one surface. However, normally, as shown in FIG. It is preferable that the injection port 21c on the upper surface and the injection port 21c on the lower surface are formed on the side opposite to each other. That is, the injection ports 21c are formed on opposite surfaces of the tube body 21, and the both-side injection ports 21c 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 21c is formed on the opposite side as described above, even if the injection port 21c, in which the tubular body 21 is welded and assembled for the first time, can not be positioned downward (in a direction toward the paper) And the sand S can be discharged through the other injection port 21c. In other words, since the two injection ports 21c 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 21 is improved.

Now, the operation and effect of the apparatus for noise vibration testing of the bed detachable 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 output shaft of the rotary device 5, The output shaft assembly 200 connected to the output shaft assembly 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 achieved by adjusting the positions of the moving plates 13a, 13b, 23 and 33, The moving plates 13a, 13b, 23 and 33 are fixed.

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 (The input motor 40, the input shaft assembly 100, the rotating machine 5, the output shaft assembly 200, and the output motor 50) All are rotated 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.

In carrying out the noise vibration measurement test of the rotary device as described above, the present invention comprises a first bed 10 provided with a rotary device 5, a second bed 20 provided with an input motor 40, The vibration of the second bed 20 and the third bed 30 is not transmitted to the first bed 40 because the third bed 30 provided with the second bed 20 and the third bed 30 installed separately 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 vibration is not transmitted to the rotary device 5 through the first bed 10, the vibration transmitted from the input motor 40 and the output motor 50 for providing the driving force and forming the load is greatly reduced So that the noise and vibration generated by the operation of the rotating machine 5 itself can be more accurately measured.

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

On the other hand, since the bed is separated from the present invention, an error occurs in the installation position of each bed, and the axial alignment state may be poor. Such defective alignment of the axes may occur due to an error in the fixing position after setting the positions of the moving plates 13a, 13b, 23, and 33 even when the beds are installed at the correct positions.

However, according to the present invention, as described above, a portion corresponding to the space between the separated beds, that is, between the motor side connecting axis assembly 110 and the rotating device side connecting axis assembly 120 in the input shaft assembly 100, The constant velocity joints 130 and 140 are provided between the motor side connection axis assembly 210 and the rotary device side connection axis assembly 220 in the output shaft assembly 200 so that the constant velocity joints 130 and 140 The vehicle can be accommodated.

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.

On the other hand, each of the beds 10, 20 and 30 is structurally very stable because the rectangular tubes are connected to each other in a lattice shape.

In addition, sand (S) is filled in each of the beds (10, 20, 30). Since the empty space inside the tubular body is eliminated due to the filling of the sand (S), resonance of vibrations generated from the motor, shaft, and rotating equipment does not occur and the vibration transmitted to the tubular body by the sand S is absorbed, The influence of the external vibration transmitted to the rotating machine 5 is minimized because it does not cause resonance with the circles (motor, shaft, rotating machine) of the bed.

In addition, since the sand (S) has a high weight (in the case of dry sand) of about 1600 to 1700 kg / m 3, the weight of the bed is greatly increased when the inside of all the tubes constituting the bed is filled with sand. As the weight increases, the possibility of resonance to external vibration is reduced, so the amount of vibration of the bed 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, it is preferable to consider this because it is difficult to discharge the sand in the tubular body as the water content increases.

By sand filling the sand as described above, the empty space in the beds 10, 20 and 30 is eliminated and the weight is increased, whereby the rotation devices 5, the input motors 40, , The output motor 50 is less affected by the vibration generated therefrom. That is, the vibrations of the beds 10, 20 and 30 due to vibrations generated during operation of the mounted devices are suppressed, so that the beds 10, 20, and 30 are rotated by the rotating device 5, the input motor 40, It is possible to more stably support the output motor 50 and the devices mounted thereon can smoothly operate in a state where the influence of vibration is minimized so that the noise vibration characteristics of the rotary device 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 21c may be formed in the tube 21 constituting the bed 10, 20, 30. Sand, water, or other filler can be injected into the interior of the tubular body 21 or discharged outside the tubular body 21 through the inlet 21c.

The injection port 21c is provided with a cap 21d which can be opened and closed in a screwed manner so that the injection port 21c can be opened and closed.

The injection port 21c and the cap 21d are not projected to the outside of the surface of the tubular body 21 in the fully engaged state so that the injection port 21c and the cap 21d are not disturbed when the tubular body 21 is handled or engaged .

A plurality of tool grooves 21e are formed on the outer circumferential surface of the cap 21d so that the cap 21d can be strongly tightened and can be easily released.

The injection ports 21c may be formed on the mutually facing surfaces of the tube 21, respectively. Accordingly, if it is difficult to open any one of the injection ports 21c to discharge the sand filled therein, the sand can be discharged through the remaining injection port 21c, so that convenience of injection and discharge of the sand is improved. Such an effect can be doubled by forming the opposite side injection ports 21c in opposite directions to each other along the longitudinal direction of the formation surface.

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.

5: rotating device 10: first bed
20: second bed 30: third bed
11, 21, 31: Tubes 12, 22, 32:
13a, 13b, 23, 33: moving plate 21c:
21d: cap 24: fixed bracket
25: Fixing plate 40: Input motor
50: Output motor 100: Input shaft assembly
200: Output shaft assembly 110, 210: Motor side connection shaft assembly
120, 220: rotating device side connecting shaft assembly 130, 230: constant velocity joint
60: Noise and vibration measurement part S: Sand

Claims (11)

A first bed provided with a rotary device,
A second bed spaced apart from one side of the first bed,
A third bed spaced apart from the other side of the first bed,
An input motor installed in the second bed,
An output motor installed in the third bed,
A noise vibration measuring unit provided on an upper portion of the rotary device of the first bed,
An input shaft assembly connecting the rotary device and the input motor;
And an output shaft assembly connecting the rotating device and the output motor,
Wherein the input shaft assembly and the output shaft assembly each include a motor side connecting axis assembly and a rotating device side connecting axis assembly, the both motor side connecting axis assembly and the rotating device side connecting axis assembly are connected by a constant velocity joint,
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 bed and the third bed, and the rotating device-side connecting shaft assembly is movable on both sides of the upper plate of the first bed Noise and Vibration Test Equipment of Rotating Equipments Installed on Moving Plate Installed. delete delete The method according to claim 1,
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 4,
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, Wherein the direction of rotation of the bed-type rotary device is perpendicular to the direction of the vibration of the bed. The method according to claim 1,
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 grid-like structure in which square tubes are coupled to each other. A first bed provided with a rotary device,
A second bed spaced apart from one side of the first bed,
A third bed spaced apart from the other side of the first bed,
An input motor installed in the second bed,
An output motor installed in the third bed,
A noise vibration measuring unit provided on an upper portion of the rotary device of the first bed,
An input shaft assembly connecting the rotary device and the input motor;
And an output shaft assembly connecting the rotating device and the output motor,
Wherein the first bed, the second bed, and the third bed are mounted on an upper part of a grid-like structure in which square tubes are coupled to each other,
The inside of the tube is filled with sand,
An injection port is formed in the tubular body, a cap for opening and closing the injection port is provided,
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 7,
Wherein water is further injected into the inside of the tubular body. delete delete The method of claim 7,
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.

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