JP4335076B2 - Rotation tester - Google Patents

Description

  The present invention relates to a rotation tester that can accurately perform, for example, a load test and a noise evaluation test of a railway vehicle drive device.

For example, a test of a rotational drive system of a vehicle is generally performed in a factory regardless of the type of test. And the point implemented in a factory is the same also in the load test and noise evaluation test of the drive device in a railway vehicle.
JP-A-5-302870 JP-A-8-43260 JP 2002-181666 A

  By the way, in recent years, there has been a remarkable increase in the speed of railway vehicles. However, in current rotation tests of railway vehicle drive devices, the connecting shaft that connects the rotation source and load source to the drive device is supported by roller bearings. At best, no-load tests were conducted at a speed of about 300 km / h.

That is, when a rotation test is performed at a high speed close to that of the current vehicle, the actual situation is that the roller bearing portion is noisy due to a large noise and a poor test environment.
In addition, as described above, since this rotation test was performed in the factory, there is background noise in the factory (normal noise when the factory is operating), and it is the input shaft of the drive unit. As shown in FIG. 6, the joint bodies 1a and 1b of the joint 1 that connects the small gear shaft or the axle that is the output shaft and the connection shaft are simply connected to each other with a bolt 2 and a nut 3 at a flat flange portion. As a result, wind noise was generated from the exposed bolts 2 and nuts 3 during the rotation test, and it was not possible to accurately measure and evaluate the noise generated by the drive device.

  The problem to be solved by the present invention is that there is currently a problem that the test environment is deteriorated and the rotation test at a high speed close to that of the current vehicle could not be performed, and the drive device during the rotation test It is a point that the measurement and evaluation of the noise generated from the above could not be accurately performed.

The rotational testing machine of the present invention is
In order to be able to perform a rotation test at a high speed close to the current vehicle in a good environment and to accurately measure and evaluate the noise generated by the drive unit during the rotation test,
In a device for performing a rotation test of a drive device,
A rotation source coupled to an input shaft or an output shaft of the driving device;
A load source connected to an output shaft or an input shaft of the drive device;
These rotation sources and load sources, and a connecting shaft portion for connecting the input shaft and the output shaft of the driving device via a joint,
The coupling shaft of the coupling shaft is supported by an oil film bearing, and the coupling shaft and the driving device are installed in an anechoic chamber, and the coupling component of the joint located in the anechoic chamber is connected to the coupling body. The most important feature is that it was buried inside .

  The rotational testing machine of the present invention is configured such that only the driving device to be tested and the connecting shaft portion that connects the input shaft and output shaft of the driving device to the rotation source and the load source are installed in the anechoic chamber, and the connection Unlike the conventional roller bearing, the shaft connecting shaft is supported by an oil film bearing, so that it can be operated at a high speed close to the current vehicle exceeding 300 km / h without significant noise from the bearing.

At that time, since the rotation source and load source that generate noise are also installed outside the anechoic chamber, only the drive unit emits sound in the anechoic chamber, and the drive unit during the rotation test Noise measurement and evaluation thereof can be performed with high accuracy. In addition, since the joint parts located in the noiseless chamber are embedded in the joint body, wind noise from the joint can be reduced during the rotation test, and the drive during the rotation test can be reduced. The noise measurement accuracy of the device and its evaluation accuracy are further improved.

  In the rotation testing machine of the present invention, when one of the connecting shaft portions and the rotation source or load source are provided so as to be slidable in a direction perpendicular to the input shaft or output shaft of the drive device, Even in a drive device in which the distance between the gear shaft and the axle is different, the rotation test can be easily performed.

  Further, in the rotation testing machine of the present invention, a slide shaft capable of expanding and contracting is interposed between the other of the connection shaft portions and a load source or a rotation source, and the other connection shaft portion is connected to the drive device. When it is provided so as to be slidable in the axial direction of the output shaft or the input shaft, a rotation test can be easily performed even with a drive device having a different axle length.

  Further, in the rotation testing machine of the present invention, when the rotating portion of the coupling shaft portion and the joint portion located in the noiseless chamber is covered with a soundproof cover, noise generated from the rotating portion during the rotation test. Thus, it is possible to further improve the noise measurement accuracy and the evaluation accuracy of the drive device during the rotation test.

  With the rotation tester of the present invention, a no-load / load rotation test at a high speed close to the current vehicle exceeding 300 km / h can be performed in a good environment without a large noise from the bearing. Measurement and evaluation can be performed with high accuracy.

  At that time, if one of the connecting shaft portions and the rotation source or load source are provided so as to be slidable in a direction perpendicular to the input shaft or output shaft of the drive device, the small gear shaft and the axle Even if the distance between the shafts is different, a slide shaft that can be expanded and contracted is interposed between the other of the connecting shaft portions and the load source or the rotation source, and the other connecting shaft portion is connected to the drive device. When the output shaft or the input shaft is provided so as to be slidable in the axial direction, a rotation test can be easily performed even with driving devices having different axle lengths.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
1 to 3 are enlarged plan views showing the rotation tester of the present invention divided into three parts, that is, the rotation source side, the test section, and the load source side, and FIG. 4 is a plan view showing the entire rotation tester of the present invention. FIG. 5 and FIG. 5 are explanatory views of the joint employed in the rotation tester of the present invention.

  In FIG. 1 to FIG. 4, reference numeral 11 denotes a drive motor that is a rotation source that imparts rotation to a test vehicle 4 that is a test target, for example, a railway vehicle. For example, a rotation test equivalent to 500 km / h can be performed every minute. 10,000 rotations are possible.

  Reference numeral 12 denotes one connecting shaft portion that is connected to the rotating shaft of the drive motor 11 and transmits the rotation to the small gear shaft 4a on the input side of the driving device 4, for example. In this example, the connecting shaft portion 12 A second connecting shaft portion 13 is further interposed between the rotating shafts of the drive motor 11.

  Reference numeral 14 denotes, for example, a dynamo installed as a load source for applying a load to the driving device 4 during a rotation test, and is for 3000 revolutions per minute. In this example, the dynamo 14 is on the output side of the driving device 4 via a slide shaft portion 15 and a second connecting shaft portion 16 which are configured as a double pipe so as to be able to expand and contract in the axial direction. It is connected to the axle 4b.

  In the rotation testing machine of the present invention having the above components, only one connecting shaft portion 12 connected to the small gear shaft 4a of the driving device 4 and the other connecting shaft portion 16 connected to the axle 4b are provided. A drive motor 11, a dynamo 14, a lubrication pump (not shown), etc., which are installed in the anechoic chamber 17 and emit noise during the test, are disposed outside the anechoic chamber 17, and both the connecting shaft portions 12, As a bearing that rotatably supports the 16 connecting shafts, an oil film bearing that can be supported without generating noise even at a high rotational speed of 10,000 rotations per minute is adopted.

  By doing in this way, even when a rotation test is performed at a high speed of 10,000 rotations per minute, the drive device 4 can be used under conditions where the background noise in the factory and the noise generated from the bearing during the test are suppressed as much as possible. The rotation test can be performed. In addition, if the penetration part to the anechoic chamber 17 of the 2nd connection shaft part 13 or the slide shaft part 15 is comprised with the double slide type soundproof wall structure, the noise in a factory will be this penetration part. Can be effectively prevented from entering the silent room 17.

  By the way, the drive motor 11, the one connecting shaft portion 12, and the second connecting shaft portion 13 are arranged on the respective racks 11a, 12a, 13a in a direction perpendicular to the small gear shaft 4a of the driving device 4 (FIG. 1, FIG. 2 and FIG. 4 are laid on the rails 11b, 12b, and 13b, for example, so that they can move freely. The hydraulic jack 18 and the motors 19 and 20 drive the motors 19 and 20, respectively. It is configured to slide in the direction.

  And when testing the drive device 4 in which the distance between the shafts of the small gear shaft 4a and the axle 4b is different, these hydraulic jacks 18 and motors 19 and 20 are driven to drive the motor 11 and one of the connecting shaft portions. 12. The second connecting shaft portion 13 is moved and moved in the direction perpendicular to the small gear shaft 4a of the driving device 4 to be aligned. At this time, if the distance piece is positioned in the moving direction and moved until it contacts the distance piece, the positioning accuracy at the stop position is improved.

  Similarly, the other connecting shaft portion 16 is also laid on the gantry 16a in the same direction as the axle 4b of the driving device 4 (left and right direction in FIG. 1 and FIG. 4), for example, on the rail 16b. And is configured to be slidable in the respective directions by driving the motor 21.

  When testing the drive device 4 having a different length of the axle 4b, the length of the slide shaft portion 15 is expanded and contracted according to the amount of change in the length of the axle 4b, and the motor 21 is driven to The connecting shaft portion 16 is moved. The positioning in this case may be the same as the positioning described above.

Further, (1) the drive motor 11 and the second connecting shaft portion 13, (2) the second connecting shaft portion 13 and one connecting shaft portion 12, and (3) one connecting shaft portion 12 and the driving device 4 are small. The gear shaft 4a, (4) the axle 4b of the driving device 4 and the other connecting shaft portion 16, (5) the other connecting shaft portion 16 and the slide shaft portion 15, and (6) a joint connecting the slide shaft portion 15 and the dynamo 14. The bolt 2 and the nut 3 that connect the joint bodies 22a and 22b of the joint 22 of (2) to (5) as shown in FIG. , the joint body 22a with a fitting hole 22c provided on the flange portion, since there configured as to bury the inside of 22b, during rotation test, it is possible to suppress the wind noise of the bolt 2 and the nut 3 .

  In the example of FIGS. 1 to 4, one connecting shaft portion 12 has a structure in which two connecting shafts are connected. In such a case, a joint 22 that connects the two connecting shafts is also provided. Needless to say, the same configuration is used.

  Similarly, if the connecting shaft and the joint portion in the connecting portions (2) to (5) are covered with the soundproof cover 23, noise generated from the rotating portion during the rotation test can be reduced. .

  In the above rotation tester of the present invention, the connection between the driving device 4 and the one connecting shaft 12 and the other connecting shaft 16 is not limited to that connected via the joint 22 as shown in FIGS. Alternatively, a train joint such as a flexible plate joint or a gear coupling may be directly connected. In this case, a rotation test closer to the current vehicle is possible. Further, the rotation test does not necessarily have to be performed in a state connected to the load source. Further, when the small gear shaft 4a and the axle shaft 4b of the driving device 4 are connected in the reverse manner to the above example, a test simulating the regenerative braking of the current vehicle can be performed.

  By the way, the noise in the rotation test (6000 revolutions per minute) equivalent to 300 km / h using the conventional rotation tester was 103 dB (A), but the noise equivalent to 500 km / h using the above-described rotation tester of the present invention was used. In the case of the rotation test (10,000 rotations per minute), the noise was greatly reduced to 70 dB (A). When the soundproof cover was not installed, the noise was as high as 99 dB (A), but it can still be seen that it can be significantly reduced compared to the case of using a conventional rotating tester when the rotational speed is taken into consideration. .

  Note that the noise measurement when using the rotation tester of the present invention is measured in the vicinity of the connecting portion of one connecting shaft portion with the small gear shaft, and when using a conventional rotating tester. Measurement values were also measured at substantially the same measurement positions.

  The present invention is not limited to the above example, and it goes without saying that the embodiment may be appropriately changed within the scope of the technical idea described in each claim. For example, in this example, the drive motor 11, the one connecting shaft portion 12, the second connecting shaft portion 13, and the other connecting shaft portion 16 are moved by the hydraulic jack 18 and the motors 20 and 21. The second connecting shaft portion 13 may not be interposed.

  The present invention as described above can be applied not only to a rotation test of a drive device for a railway vehicle, but also to a rotation test machine for a drive device of various vehicles or ships.

It is an enlarged plan view of the test part which comprises the rotation testing machine of this invention. It is an enlarged plan view on the side of the rotation source constituting the rotation tester of the present invention. It is an enlarged plan view by the side of the load source which comprises the rotation testing machine of this invention. It is the top view which showed the whole rotation testing machine of this invention. It is explanatory drawing of the coupling employ | adopted as the rotation testing machine of this invention. It is explanatory drawing of the joint employ | adopted with the conventional rotation test machine.

Explanation of symbols

4 drive device 4a small gear shaft 4b axle 11 drive motor 11b rail 12 one connecting shaft portion 12b rail 14 dynamo 15 slide shaft portion 16 other connecting shaft portion 16b rail 17 anechoic chamber 18 hydraulic jack 20, 21 motor 22 joint 22a, 22b Fitting body 23 Soundproof cover

Claims (4)

A device for performing a rotation test of a drive device,
A rotation source coupled to an input shaft or an output shaft of the driving device;
A load source connected to an output shaft or an input shaft of the drive device;
These rotation sources and load sources, and a connecting shaft portion for connecting the input shaft and the output shaft of the driving device via a joint,
The coupling shaft of the coupling shaft is supported by an oil film bearing, and the coupling shaft and the driving device are installed in an anechoic chamber, and the coupling component of the joint located in the anechoic chamber is connected to the coupling body. Rotating tester characterized by being buried inside .   The one of the connecting shaft portions and the rotation source or load source are provided so as to be slidable in a direction perpendicular to the input shaft or the output shaft of the driving device. Rotation tester.   A slide shaft capable of expanding and contracting is interposed between the other of the connection shaft portions and the load source or the rotation source, and the other connection shaft portion slides in the axial direction of the output shaft or the input shaft of the drive device. The rotation tester according to claim 1, wherein the rotation tester is provided so as to be possible. The rotation testing machine according to any one of claims 1 to 3, further comprising a soundproof cover that covers a rotating portion of the coupling shaft portion and the joint portion located in the anechoic chamber.

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