JPS6324423Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a dynamic balance testing machine that performs dynamic balance tests on test objects such as rotors, and particularly relates to a bearing height adjustment device that adjusts the height of the bearing. .

When performing a dynamic balance test on a test object such as a rotor, there is a method in which the test object is supported by a bearing installed on a stand, the test object is rotated, and the amount of unbalance is detected by a detector installed on the stand. Generally taken.
For example, FIG. 1 shows a so-called hard type testing machine. In this testing machine, an upper frame 1a of a gantry 1 is elastically held against a lower frame 1b by a leaf spring 2, and a test specimen 3 is supported by a bearing 4 provided on the upper frame 1a. Then, the specimen 3 is rotated, and the amount of unbalance is detected by a pickup 5 installed between the upper frame 1a and the lower frame 1b. The pick-up 5 is moved to the upper frame 1 by the centrifugal force of the specimen 3.
The load transmitted to a is detected as the amount of unbalance of the test specimen 3. Although only one mount 1 is shown in the drawing for convenience, in reality, a pair of mounts 1 with the same structure are arranged at intervals in the axial direction of the test specimen 3, and a pair of rollers 6 and A bearing 4 made up of the mounting plate 7 is provided on the upper frame 1a of each pedestal 1, respectively. Then, the journals 3 at both ends of the test specimen 3
a is engaged with the roller 6 of the bearing 4 of each pedestal 1, so that the specimen 3 is usually stretched across and supported between the bearings 4 of each pedestal 1. Further, in order to rotate the test specimen 3, one end thereof is often connected to a drive shaft of a testing machine by a coupling.

FIG. 2 shows a so-called soft type testing machine. This allows the movable frame 11a of the frame 11 to be moved to the fixed frame 1.
The test specimen 1 is suspended from 1b by a leaf spring 12.
3 is supported by a bearing 14 provided on the movable frame 11a. Then, the test body 13 is rotated, and the amount of unbalance is detected by a moving coil 15a installed between the movable frame 11a and the fixed frame 11b. The moving coil 15a is displaced relative to the magnet 15b, and the movable frame 1
The amount of rocking 1a is detected as the amount of unbalance of the test body 13. In this case as well, the pair of frames 11
are arranged at intervals in the axial direction, and the journals 13a at both ends of the test specimen 13 are connected to the bearings 14 of each frame 11.
It is the same that the roller 16 is engaged with.

In this type of hard type or soft type testing machine, in order to rotate the test pieces 3, 13 smoothly and perform an accurate dynamic balance test, it is necessary to
The axis must be kept horizontal. However, the journals 3a, 1 at both ends of the test specimens 3, 13
The diameters of the journals 3a are not necessarily the same, and depending on the specimen, the diameters of the journals 13a and 13b at both ends may be different. For this reason, test specimens 3 and 13
In order to keep the axis horizontal, it is necessary to change and adjust the height of the bearings 4, 14 of one of the frames 1, 11 according to the diameters of the journals 3a, 13a at both ends. In addition, in order to connect one end of the test specimens 3, 13 to the drive shaft of the testing machine through a coupling, the test specimens 3, 13 and the drive shaft must be centered. For this reason, journals 3a, 13
It is necessary to change and adjust the height of the bearings of both frames 1 and 11 according to the diameter of a.

Conventionally, the mounting plates 7, 17 of the bearings 4, 14 are guided so as to be movable up and down by guide rails 8, 18 formed on the upper frame 1a of the pedestal 1, 11 and the movable frame 11a.
It was fixed with bolts 9 and 19. and,
Operate the mounting plates 7, 17 and bolts 9, 19,
Only the mounting plates 7, 17 and the rollers 6, 16 are moved up and down relative to the upper frame 1a and movable frame 11a of the frames 1, 11, thereby adjusting the heights of the bearings 4, 14. However, it is not easy to operate the mounting plates 7, 17 and bolts 9, 19 and adjust the heights of the bearings 4, 14. There is no hope of automating this. In order to facilitate and automate the adjustment, it is necessary to provide an operating mechanism such as a cylinder between the mounting plates 7, 17 of the bearings 4, 14, the upper frame 1a of the mount 1, 11, and the movable frame 11a.
This is not only difficult in terms of space, but also causes the problem that the weight of the operating mechanism is added to the upper frame 1a and lower moving frame 11a of the frames 1 and 11. The weight added to the upper frame 1a and the movable frame 11a is measured by a detector,
That is, pick-up 5, moving coil 15
Affects the sensitivity of a. For example, test specimens 3 and 13
Let the weight of W be W, and the other upper frame 1a and movable frame 1
The weight added to 1a, i.e. rollers 6,1
6. Letting W' be the weight of the upper frame 1a, movable frame 11a, etc., the sensitivity of the detector is expressed by the following equation.

A=KW/W+W' Weight added to upper frame 1a and movable frame 11a
As W' increases, the sensitivity A of the detector is impaired. For this reason, in the past, due to space limitations and sensitivity of the detector, it was not possible to provide a special operating mechanism, and the only option was to use bolts 9 and 19.

Therefore, this invention was devised in order to be able to easily adjust the height of the bearing in a dynamic balance tester without impairing the sensitivity of the detector, and to also be able to automate this process. It is something. In this invention, a pair of mounts are arranged at a distance from each other, each of the mounts is provided with a bearing, and a test object such as a rotor is supported by the bearing of each of the mounts.
In a dynamic balance testing machine that rotates the test specimen and detects the amount of unbalance by a detector installed on the pedestal, an elevating guide mechanism that guides each of the pedestals individually so that they can be raised and lowered; A pair of elevating and lowering operation mechanisms are provided for raising and lowering each of the mounts as a whole along the guide mechanism, and each of the mounts as a whole is raised and lowered by each of the operation mechanisms, thereby increasing the height of the bearing of each of the mounts. The feature is that the height can be adjusted.

Examples of this invention will be described below.

Figure 3 shows a soft type testing machine using this idea. The fixed frame 11b of the pedestal 11 is fixed and supported on the support table 20. The support table 20 is slidably fitted into a plurality of guide posts 21 and guided by the guide posts 21 so as to be movable up and down. Therefore, the frame 11
The whole, that is, the movable frame 11a and the fixed frame 11b
The entire bearing 14 and the like are guided by a guide post 21 so as to be movable up and down. The guide post 21 is arranged vertically and fixed on the bed 22. Further, in this embodiment, a plurality of cylinders 23 are used as the lifting/lowering operation mechanism. The cylinder 23 has a rod 24 connected to its piston and is arranged vertically. The cylinder 23 is attached to the support table 20,
The rod 24 is fixed or locked onto the bed 22. In addition, in order to detect the height of the bearing 14,
A linear scale 25 is used. The linear scale 25 is arranged vertically and fixed on the bed 22. The upper end 25a faces a contactor 26 provided on the lower surface of the support table 20. The contact 25 is located at the upper end 25 of the linear scale 25.
When touching a, the linear scale 25 operates,
The height of the bearing 14 is thereby detected. As will be described later, the linear scale 25 is connected to the cylinder 23
It has the effect of stopping the

Note that the support table 20, guide post 21, cylinder 23, and linear scale 25 are also installed not only on one mount but also on the other mount.
etc. are provided.

In the bearing height adjustment device for a dynamic balance tester configured as described above, when the cylinder 23 is driven, the support table 20 is pushed up or down, and the entire pedestal 11 is raised and lowered integrally with the support table 20. . The reaction force is transmitted to the bed 22 by the rod 24, and the bed 22 receives and supports the transmitted reaction force. Support table 2
0 slides along the guide post 21, and the guide post 21 is connected to the support table 20 and the pedestal 11.
to guide you. When the cylinder 23 is stopped, the support table 20 and the pedestal 11 are held in place by the internal pressure of the cylinder 23.

To adjust the height of the bearing 14, the entire pedestal 11 and the support table 20 are once raised to a predetermined position. Then, the height of the upper end 25a of the linear scale 25 is adjusted. By this, bearing 1
4 heights can be set in advance. Thereafter, the entire pedestal 11 may be lowered by the cylinder 23. When the contactor 26 of the support table 20 contacts the upper end 25a of the linear scale 25,
The linear scale 25 operates to stop the cylinder 23. Therefore, the height of the bearing 14 is automatically and precisely adjusted to the set height.

Furthermore, since this testing machine is equipped with a cylinder 23 and a linear scale 25 for each pedestal 11, the height of the bearing of each pedestal 11 can be adjusted individually. Either one of the mounts 1
It is also possible to adjust only the height of one bearing 14. It is also possible to adjust the height of both bearings 14 simultaneously.

Therefore, when subjecting the test specimen 13 to a dynamic balance test, the height of the bearing 14 of each mount 11 can be arbitrarily adjusted depending on the diameter of the journals 13a at both ends. When the height of the upper end 25a of the linear scale 25 of each pedestal 11 is adjusted according to the diameter of the journal 13a and the cylinder 23 is driven, the height of the bearing of one pedestal 11 is automatically adjusted according to the diameter of the other journal 13a. accurately and accurately. The height of the bearing of the other pedestal is automatically and precisely adjusted according to the diameter of the other journal. Therefore,
When the journal 13a is engaged with the roller 16 of the bearing 14 of each frame 11, the axis of the test specimen 13 is kept horizontal. Therefore, the test body 13 can be rotated smoothly and a dynamic balance test can be performed accurately.

Even if this invention is applied to a hard type testing machine instead of a soft type, similar effects can be obtained. When connecting one end of the test object to the drive shaft of the testing machine, it is also easy to center the test object and the drive shaft. When testing different types of specimens sequentially and alternately, the linear scale 2
5 and the cylinder 23, it is also possible to automate not only the adjustment of the height of the bearing 14 but also the entire test.

Note that when the test specimen 13 is supported by the bearing 14, not only the entire support table 20 and pedestal 11 are held by the internal pressure of the cylinder 23;
The guide post 2 can be locked by a suitable mechanical locking mechanism.
It may be locked to 1. Furthermore, a motor may be used instead of the cylinder 23 as the lifting/lowering operation mechanism. If automation is not required, a manually operated handle or the like may be used.

As explained above, this invention guides not only the mounting plate and rollers of the bearings, but also the entirety of each pedestal 11 so that they can be raised and lowered individually, and each pedestal 11 is guided in its entirety by a pair of elevating and lowering operating mechanisms such as cylinders 23. Since it is raised and lowered, the height of the bearing 14 of each frame 11 can be easily adjusted, and this can also be automated. It is also possible to relatively adjust the height of the bearing 14 of each frame 11. cylinder 23
The weight of a pair of lifting/lowering operation mechanisms such as
It cannot be added to the upper frame 1a and movable frame 11a. Therefore, the sensitivity of the detector is not impaired.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view showing a conventional hard type testing machine, FIG. 2 is an explanatory view showing a conventional soft type testing machine, and FIG. 3 is a side view showing an embodiment of this invention. 1, 11... Frame, 3, 13... Test specimen, 4,
14...Bearing, 5...Pickup, 15a...
Moving coil, 15b...Magnet, 20
...Support table, 21 ...Guide post, 23
...Cylinder, 25...Linear scale.

Claims (1)

[Scope of utility model registration request] A pair of mounts are arranged at a distance from each other, each of the mounts is provided with a bearing, a test object such as a rotor is supported by the bearings of each of the mounts, the test object is rotated, and the amount of unbalance is measured as described above. In a dynamic balance testing machine in which detection is performed by a detector equipped on a pedestal, there is provided an elevating guide mechanism that guides each pedestal so that it can be raised and lowered individually; and a pair of elevating and lowering operating mechanisms for raising and lowering each pedestal, and the entire pedestal is raised and lowered by each operating mechanism, thereby adjusting the height of the bearing of each pedestal. Bearing height adjustment device.