JP2592662Y2 - Environmental testing equipment for rotating machines - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for testing the environment of a rotating machine, and more particularly to an improvement in an airtight seal of a wall portion through which a rotating shaft passes.

[0002]

2. Description of the Related Art An engine mounted on an automobile is tested in a laboratory in various environments in advance so that the engine does not break down even when used in any environment. In order to create various environments and to shield noise, this laboratory is set up as a closed laboratory, in which an engine to be tested is operated, and a test is performed by a test machine provided in an adjacent room.

FIG. 3 is a schematic explanatory view of this test apparatus.
Is a wall, and the test chamber A and the test machine room B are partitioned by the wall. Reference numeral 2 denotes a sealing device between the through hole formed in the wall 1 and the intermediate shaft 3, which effectively shields temperature and sound. In this sealing device, the pressure in the chamber A must be reduced, and when there is a pressure difference between the chamber B and the atmospheric pressure, the gap must be eliminated and the chamber must be sealed. The intermediate shaft 3 has constant velocity ball joints 4 at both ends. One end is connected to an electric dynamometer 5 which is a test machine, and the other end is connected to a rotating shaft of a drum 7 for transmitting power of an automobile 6 which is a test machine. . Reference numeral 8 denotes an installation block of the electric dynamometer 5, and 9 denotes an installation block of the drum 7, both of which are insulated from the building via a vibration absorbing material BK. Reference numeral 10 denotes a bearing stand for the drum 7.

FIGS. 4A and 4B are detailed explanatory views of the sealing device 2, in which FIG. 4A is a sectional view of an essential part, and FIG. 4B is a side view thereof. Support flanges in which a middle frame having a small flange 12 is welded to
3 is a support flange attached to the small flange 12 to be parallel to the support flange 11 and fixed to the wall 1;
Reference numeral 14 denotes a filler material such as mortar poured from holes (not shown) provided in the support flanges 11 and 13. Reference numeral 15 denotes a seal mounting flange hermetically attached to the support flanges 11 and 13 via a gasket or the like. Hermetic seal 16
Is mounted. The support flange 11 is provided so as to be concentric with the intermediate shaft 3, and a plane including the flange surface intersects the intermediate shaft 3 perpendicularly.

[0005] The intermediate shaft 3 has a contact-type hermetic seal 16 which is in contact with the intermediate shaft 3 to maintain airtightness at a penetrating portion of the wall 1.
Is sealed by the sealing device 2 to which the test is performed, so that the test can be performed by reducing the pressure of the room on the side of the device under test.

[0006] In the following description, not only the automobile 6 but also the drum 7 will be referred to as a rotating machine to be tested.

[0007]

When the electric dynamometer 5 or the drum 7 generates a displacement perpendicular to a line passing through the axis of the support flanges 11, 13 or a displacement including a component in a direction perpendicular thereto, the intermediate shaft 3 comes into contact with the electric dynamometer 5. For example, the lip portion of the hermetic seal 16 is forcibly pressed to wear the lip portion, or conversely, a gap is formed to break the airtightness. Contact occurs and causes seizure.

[0008] This type of test equipment is subject to severe vibration,
There is a possibility that the electric dynamometer 5 and the drum 7 may be displaced due to the foundation of the building, land subsidence, etc. in long-term use. Therefore, the test can be continued even if the test machine or the device under test is displaced due to vibration, and the centering accuracy between the test device and the device under test during installation is reduced to facilitate the installation work. For this purpose, constant velocity ball joints are provided at both ends of the intermediate shaft 3. However, if the test machine or the device under test is displaced more than the slightest displacement allowed for the contact type hermetic seal, the hermeticity is broken. Or if seizure occurs, the effect cannot be expected.

In the case of a test simulating a high or low temperature environment at a high altitude, the device under test is tested at a high or low temperature in a decompressed room, and the temperature of the device under test passes through an intermediate shaft. Affect. In general, when testing at high temperatures, there is no problem because the temperature does not exceed the specified temperature of the tester.However, when testing at extremely low temperatures, the shaft is extremely cooled and the equipment on the tester side exceeds the range of normal temperature specifications. There are cases.
In such a case, there arises a problem that the bearing lubricant needs to be replaced. It is desirable that the test machine be able to perform the test without modification regardless of the test conditions of the device under test.

The length between the back surface of the support flange 11 and the surface of the small flange 12 must be designed and manufactured according to the thickness of the wall 1, but the wall thickness has a large error, The length cannot be determined according to the wall thickness only after the construction is completed. For this reason, not only the construction period is lengthened, but also the problem that the design and the maker side cannot be cut off forever.

The present invention has been made in view of the above points, so that the airtightness is not broken even if the test machine or the device under test is displaced, and the test is performed even if the test temperature condition of the device under test is displaced. It is an object of the present invention to provide a hermetic sealing device in a through-wall portion of a rotating shaft that can be tested without modification to a machine and that allows a support flange to be manufactured before the wall is completed.

[0012]

Means for solving the above problems in the present invention are as follows. A test machine and a machine to be tested of a rotating machine are installed with a wall therebetween, and a penetrating hole formed in the wall is provided. In an environmental test apparatus for a rotating machine in which the test machine and the device under test are connected to each other through an intermediate shaft through a hole, an airtight frame surrounding a shaft is attached to the bearing frame on the wall side of the test machine or the device under test. An airtight seal device is provided in the shaft insertion portion of the frame, one end of the flexible pipe joint is attached to a flange provided on the outer peripheral direction of the airtight seal, and the other end side of the flexible pipe joint is provided in a through hole in the wall. Airtightly on the support flange.

A second temperature control chamber is formed on the wall side of the airtight frame by surrounding the shaft with an airtight sealing device.
And a flexible pipe joint is provided between the wall side of the second hermetic frame and the support flange of the through hole of the second hermetic frame to perform heat insulation in the temperature control chamber.

[0014]

Since the airtight frame is mounted on the bearing frame of the test machine or the machine to be tested, there is no change in the relative position between the airtight frame and the shaft protruding from the bearing frame. The interference between the closed contact hermetic seal and the shaft is kept in one chamber.

The influence of the displacement of the test machine or the device under test is absorbed by the flexible pipe joint and the intermediate shaft having the constant velocity ball joints at both ends.

The shaft can be heated in the second hermetic frame, and dry air can be supplied to the frame to pressurize or circulate the air.

The support flange of the shaft wall through-hole opening can be designed and manufactured before the wall is completed and can be easily installed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. The same parts as those in FIGS. 3 and 4 are denoted by the same reference numerals, and description thereof is omitted.

FIG. 1 is a sectional view of a main part of an embodiment of the present invention.
An embodiment in which an airtight seal portion is provided on the device under test side is shown. In the figure, reference numeral 10a denotes a bearing frame supported by a bearing base 10 of the device under test in FIG.
0c is an axis. Reference numeral 18 denotes a hermetic seal attached to an example of the wall of the bearing frame 10a. One end of the hermetic seal 18 is attached to the bearing frame 10a via an attachment flange to the bearing frame 10a, and the other end is formed from the bearing frame 10a. A hermetic sealing device SL for rotatingly sealing around the protruding shaft 10c is mounted. The hermetic seal device SL includes a contact-type hermetic seal 16 that comes into concentric contact with the shaft 10c and the hermetic seal 1.
One end of a flexible pipe joint 20 of a bellows type or the like is hermetically attached via a gasket or the like to a flange that is formed by seal holders 17 and 19 that support The other end of the flexible pipe joint 20 is airtightly attached to a support flange 21 of a through hole formed in the wall 1 via a gasket or the like.

The through portion of the wall 1 of the intermediate shaft 3 is different from the conventional one described with reference to FIG. 4, and it is only necessary that the flexible pipe joint 20 can be airtightly mounted via a gasket or the like. The mounting accuracy of the flange 21 is not required and can be easily mounted. Reference numeral 22 denotes a tubular middle frame welded to the support flange 21 and is manufactured to be long in anticipation of an error in the thickness of the wall 1. 23 is a support plate "split"
It may be. Reference numeral 14 denotes a filler such as mortar.

With the above configuration, the shaft 10c and the hermetic seal 18 are mounted on the same bearing base 10 via the bearing frame 10a. Even if there is a relative change (such as misalignment) between the walls, the relative position does not change between the hermetic seal 18 and the shaft 10c, so the contact type hermetic seal 16 attached to the hermetic seal 18 and the shaft 10c is kept constant, the contact-type hermetic seal 16 is forcibly pressed and damaged by the shaft 10c, a gap is formed between the hermetic seal 16 and the shaft 10c, or a seal holder is formed. 17, 19
It does not mean that metal contact occurs between the shaft and the shaft 10c and the like, causing seizure.

Even if the electric dynamometer 5 as the test machine and the drum 7 as the device under test in FIG. 3 are displaced due to vibrations or the like, the influence of the displacement does not affect the flexible pipe joint 20 or the constant velocity ball joint 4 on both ends. Is absorbed by the intermediate shaft 3 and does not reach the mounting portion of the contact type airtight seal 16.

In addition, a support flange 21 capable of airtightly attaching the flexible pipe joint 20 via a gasket or the like may be provided in the wall through-hole of the intermediate shaft 3, and mounting accuracy is not required. It can be designed and manufactured without waiting for completion, and can be easily installed.

In the above-described test apparatus, when testing a device under test at a very low temperature, the test is performed by lowering the temperature of the device room A, but the test device room B is at a normal room temperature. A testing machine with a normal temperature specification is also used. At this time, the intermediate shaft 3
Is cooled to a low temperature, the temperature becomes lower than the normal temperature specification of the testing machine, and the testing machine is affected by mechanical heat. FIG. 2 is designed so as not to be affected by the heat. In FIG. 2, reference numeral 24 denotes a second hermetic frame, one end of which is attached to a flange provided so as to protrude outward from the hermetic frame 18, and has a contact-type hermetic seal concentric with a shaft 5c protruding from the bearing frame 5a. The hermetic seal 16 of the device SL is attached via seal holders 25 and 26 and the like, and one end of a flexible pipe joint 20 is hermetically attached via a gasket or the like to a flange projecting outward. The other end of the flexible pipe joint 20 is hermetically attached to a support flange 21 provided in a wall through hole via a gasket or the like. In the second hermetic frame 24, a temperature control chamber 30 sealed by the hermetic sealing device SL is formed. An electric heater 27, a thermostat 28, and a supply / exhaust pipe 29 connected to two supply / exhaust ports provided for the object are provided in the temperature control chamber 30.

At the time of a high and low temperature environment test in a high altitude, when the room A on the device under test side is depressurized, dry air having a pressure slightly higher than the pressure in the room on the test device side is circulated through the supply / exhaust pipe 29. Even if a leak occurs in the contact-type hermetic seal 16, the high-temperature air in the room on the test machine side does not leak into the decompressed room on the test machine side.

When the temperature of the room on the side of the device under test is set to a high or low temperature, it affects the side of the device under test through the intermediate shaft 3. When the temperature of the room on the side of the machine under test is lowered, the shaft 5c is heated by the electric heater 27, and the rolling bearing 5b can be kept within the specified temperature range of the electric dynamometer 5. The thermostat 28 controls on / off of the electric heater 27 to control the temperature in the second hermetic frame 24.
When the room on the side of the device under test is heated to a high temperature, the temperature is generally within the specification temperature range of the test device. Therefore, it is not necessary to particularly cool the shaft 5c. Instead, a cooling means such as disposing a cooling pipe may be used.

In the embodiment shown in FIG. 1, an example has been described in which the hermetic sealing device is provided on the test machine room side, and the temperature control chamber is provided on the test machine room side. .

[0028]

[Effects of the Invention] As described above, the present invention is a device in which a contact-type airtight seal is attached to an airtight frame attached to a bearing frame of a test machine or a device under test, coaxially with a shaft protruding from the bearing frame. Therefore, even if a relative displacement occurs between the test machine and the device under test, and the wall separating them, the influence of those relative displacements are all affected by the intermediate shaft connected at both ends by a constant velocity ball joint, and The support flange provided at the opening of the wall through-hole of the intermediate shaft and the flexible pipe joint hermetically mounted between the hermetic frame absorb the relative position between the protruding shaft and the contact type hermetic seal. It is possible to maintain a good air-sealed state without any change, and to completely separate the room on the side of the testing machine and the room on the side of the device under test from airtight.

The support flange provided at the opening of the through hole in the intermediate shaft only needs to be able to air-tightly attach the flexible pipe joint, and does not require any mounting accuracy, so that it can be designed and manufactured without waiting for the wall to be completed. As a result, the so-called hand-cutting is good, and it can be easily attached, thereby shortening the construction period.

Further, since the second airtight frame is provided on the wall side of the airtight frame and the temperature control chamber is formed by this airtight frame, in addition to the above-described effects, the test conditions on the device under test are Is not affected. For example, in the cryogenic environment test of the EUT, the shaft is heated by an electric heater, and the temperature of the bearing is kept within the specified temperature range of the test machine. Environmental tests can be performed.

Further, by circulating the dry air having a pressure higher than the pressure of the chamber on the side of the tester in the second hermetic frame, leakage occurs due to a decrease in the sealing force at the contact hermetic seal portion. Even in this case, it is possible to prevent air with high humidity in the room on the test machine side from leaking into the room on the test machine side.

Various practical effects can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory side sectional view showing one embodiment of the present invention.

FIG. 2 is an explanatory side sectional view showing another embodiment of the present invention.

FIG. 3 is an overall explanatory view of an environmental test apparatus for a rotating machine.

FIG. 4 is an explanatory view of a hermetic seal portion in a conventional example,
Is a longitudinal front view, and (B) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wall 3 ... Intermediate shaft 5a ... Bearing frame 16 ... Hermetic seal 18 ... Hermetic frame 20 ... Flexible pipe joint 21 ... Support flange 24 ... Second hermetic frame 27 ... Electric heater 28 ... Thermostat 29 ... Piping 30 ... Temperature control Chamber SL: airtight sealing device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01M 19/00 G01M 17/007

Claims (2)

(57) [Scope of request for utility model registration] 1. A rotating device comprising a testing machine and a machine to be tested of a rotating machine which are installed with a wall interposed therebetween, and wherein the testing machine and the device to be tested are connected through an intermediate shaft through a through hole formed in the wall. In the environmental test apparatus of the machine, an airtight frame surrounding a shaft is attached to the bearing frame on the wall side of the test machine or the device to be tested, and a hermetic seal device is provided in a shaft insertion portion of the hermetic frame. An environmental test of a rotating machine characterized in that one end of a flexible pipe joint is attached to a flange provided in the direction, and the other end of the flexible pipe joint is airtightly attached to a support flange provided in a through hole of the wall. apparatus. 2. A second hermetic frame, which forms a temperature control chamber by surrounding an axis around the hermetic seal device with a hermetic seal device, is attached to the wall side of the hermetic frame, and the wall side of the second hermetic frame penetrates the wall. The environmental test apparatus for a rotating machine according to claim 1, wherein a flexible pipe joint is provided between the support flanges of the holes.