JPH0651854U - Environmental test equipment for rotating machines - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the airtight seal in the wall penetration part of the rotating shaft so that the airtightness will not be broken even if the test machine or the device under test is displaced. [Structure] An airtight frame 18 is attached to the wall side of a wall-side bearing frame 10a of a tester or a device under test, a contact-type airtight seal 16 is attached concentrically with a shaft 10c protruding from the bearing frame 10a, and an outer peripheral direction is provided. Protruding flange 18
And the flexible pipe joint 2 between the support flange 21 provided in the through hole
Install 0 airtightly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

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

[0002]

[Prior art]

 Engines installed in automobiles are tested in a laboratory premised on various environments so that they will not fail even if used in any environment. This laboratory creates a closed environment because it is necessary to create various environments and to shield noise, and the engine under test is operated in it, and the test is conducted by the test machine installed in the adjacent room.

FIG. 3 is a schematic explanatory view of this test apparatus. Reference numeral 1 is a wall which divides a room A to be tested and a test machine room B. 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 air pressure in the room A must be lowered, and if there is a pressure difference from the room B in the atmospheric pressure, it must be closed without a gap. The intermediate shaft 3 is provided with constant velocity ball joints 4 at both ends, one end of which is connected to an electric dynamometer 5 which is a test machine, and the other end of which is connected to a rotary shaft of a drum 7 which transmits power of an automobile 6 which is a device under test. . Reference numeral 8 is an installation block of the electric dynamometer 5, and 9 is an installation block of the drum 7, both of which are vibration-insulated with the building through the vibration absorbing material BK. Reference numeral 10 indicates a bearing of the drum 7.

4A and 4B are detailed explanatory views of the sealing device 2. FIG. 4A is a sectional view of a main part and FIG. 4B is a side view of the same. In these drawings, 11 is fixed to the wall 1 and the tip is shown. A support flange having a small frame 12 welded to its inside, a support flange 13 attached to the small flange 12 to be parallel to the support flange 11 and fixed to the wall 1, and 14 to the support flanges 11 and 13. A filling material such as a mortar poured from a hole (not shown) provided, and a seal mounting flange 15 which is hermetically mounted on the supporting flanges 11 and 13 via a gasket or the like, and a contact type hermetic seal 16 is fitted therein. A seal holder 17 is attached. The support flange 11 is concentric with the intermediate shaft 3, and the plane including the flange surface is provided so as to intersect the intermediate shaft 3 at right angles.

The intermediate shaft 3 is sealed at the penetration portion of the wall 1 by a sealing device 2 provided with a contact-type airtight seal 16 that contacts the intermediate shaft 3 to maintain airtightness, so that the room on the side of the machine under test is sealed. Can be depressurized to perform the test.

In the following description, not only the automobile 6 but also the drum 7 will be referred to as a rotating machine under test.

[0007]

[Problems to be solved by the device]

 When the electric dynamometer 5 or the drum 7 is displaced in a direction perpendicular to a line passing through the shaft cores of the support flanges 11 and 13, or a displacement including a vertical direction component is generated, the intermediate shaft 3 is connected to the contact-type hermetic seal 16 such as a lip. Force the parts to wear out the lip part, or conversely create air gaps to break the airtightness, and if the displacement becomes larger, metal contact occurs with the seal holder 17 and seal mounting flange 15, causing seizure. .

Since the test device of this kind violently vibrates, there is a possibility that both the electric dynamometer 5 and the drum 7 may be displaced due to building foundation, ground subsidence, etc. during long-term use. Therefore, so that the test can be continued even if the tester or the device under test is displaced due to vibration, the centering accuracy of the tester and the device under test at the time of installation is reduced to facilitate the installation work. In order to achieve this, constant velocity ball joints are provided at both ends of the intermediate shaft 3. However, as described above, if the test machine or EUT is displaced beyond the very slight displacement allowed for the contact-type hermetic seal, If it is broken or burns, the effect cannot be expected.

Further, in the case of a test simulating a high-low temperature environment in a highland, the device under test is tested at a high temperature or a low temperature in a depressurized building, and the temperature of the device under test is tested through the intermediate shaft. Affect the opportunity. Generally, there is no problem because the temperature does not exceed the specified temperature of the tester when testing at high temperature, but when testing at extremely low temperature, the shaft is extremely cooled and the equipment on the tester side is within the range of room temperature specifications. It may exceed. In such a case, there arises a problem that the bearing lubricant needs to be replaced. It is desirable that the tester be able to perform tests without modification, regardless of the test conditions of the device under test.

Further, 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, and Only after the construction is completed can the length be determined according to the wall thickness. Therefore, it not only prolongs the construction period, but also has the problem that the designers and producers cannot keep their hands.

The present invention has been made in view of the above points, and the airtightness is not broken even when 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 changed. It is an object of the present invention to provide an airtight seal device in the wall penetration part of the rotating shaft, which can be tested without any additional work on the machine, and the support flange can be manufactured before the wall is completed.

[0012]

[Means for Solving the Problems]

 Means for solving the above-mentioned problems in the present invention are as follows: a test machine and a machine under test of a rotary machine are installed with a wall therebetween, and an intermediate shaft is passed through a through hole formed in the wall. In an environment testing device for a rotating machine, which is connected to a device under test, attach an airtight frame surrounding the shaft to the bearing frame on the wall side of the test device or the device under test, and attach an airtight seal to the shaft insertion part of the airtight frame. A device is provided, and one end of the flexible pipe joint is attached to the flange provided in the outer peripheral direction of the airtight seal, and the other end of the flexible pipe joint is airtightly attached to the support flange provided in the through hole of the wall. .

Further, a second airtight frame which surrounds a shaft and is surrounded by an airtight sealing device to form a temperature control chamber is attached to the wall side of the airtight frame, and the wall side and the wall of the second airtight frame are attached. It is characterized in that a flexible pipe joint is provided between the support flanges of the through holes to block heat in the temperature control chamber.

[0014]

[Action]

 Since the airtight frame is attached to the bearing frame of the testing machine or the device under test, there is no change in the relative position between the airtight frame and the shaft protruding from the bearing frame, so it was attached to the airtight frame. The interference between the contact-type hermetic seal and the shaft is kept in one chamber.

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

The shaft can be heated in the second airtight 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]

【Example】

 The present invention will be described below based on an embodiment shown in the drawings. The same parts as those in FIGS. 3 and 4 are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention, showing an embodiment in which an airtight seal portion is provided on the side of the device under test, in which FIG. 10a shows the device under test in FIG. A bearing frame supported by the bearing stand 10 is a rolling bearing 10b, and a shaft 10c. Reference numeral 18 denotes an airtight seal attached to one example of the wall of the bearing frame 10a. One end side of the airtight seal 18 is attached to the bearing frame 10a via a mounting flange to the bearing frame 10a, and the other end side is from the bearing frame 10a. An airtight seal device SL is provided which surrounds the protruding shaft 10c and seals by rotation. The airtight seal device SL is formed by a contact-type airtight seal 16 that is in concentric contact with the shaft 10c, and seal holders 17 and 19 that support the airtight seal 16, and a flange provided so as to project in the outer peripheral direction. One end of a flexible tube joint 20 of a bellows type or the like is airtightly attached through a gasket or the like, and the other end of the flexible tube joint 20 is provided with a gasket or the like on a support flange 21 of a through hole formed in the wall 1. It is mounted airtightly through.

The penetrating portion of the wall 1 of the intermediate shaft 3 is different from the conventional one described with reference to FIG. 4, and it suffices if the flexible tube joint 20 can simply be attached in an airtight manner via a gasket or the like. The flange 21 can be easily mounted without requiring mounting accuracy. Reference numeral 22 is a tubular middle frame welded to the support flange 21 and is made long in consideration of an error in the thickness of the wall 1. A support plate 23 may be "divided in two". 14 is a filler such as mortar.

With the above configuration, the shaft 10c and the airtight seal 18 are mounted on the same bearing base 10 via the bearing frame 10a, so that the foundation of the machine under test, the wall, the foundation of the machine under test, or Even if there is a relative change (misalignment) between the walls, the relative position does not change between the airtight seal 18 and the shaft 10c. The interference between the shaft 10c and the shaft 10c is kept constant, the contact-type hermetic seal 16 is forcibly pressed by the shaft 10c to be damaged, or a gap is generated between the hermetic seal 16 and the shaft 10c. Alternatively, the seal holders 17, 19 and the like and the shaft 10c do not come into contact with metal to cause seizure.

Further, even if the electric dynamometer 5 which is the test machine and the drum 7 which is the device under test in FIG. 3 are displaced due to vibration or the like, the effect of the displacement is that the flexible pipe joint 20 or the constant velocity ball joints at both ends is used. The intermediate shaft 3 provided with 4 absorbs and does not reach the mounting portion of the contact-type hermetic seal 16.

Further, the wall through-hole of the intermediate shaft 3 may be provided with a support flange 21 capable of air-tightly attaching the flexible tube joint 20 via a gasket or the like, and since the attaching accuracy is not necessary, the wall 1 of the wall 1 is not required. It can be designed and manufactured without waiting for completion, and can be easily installed.

In the above-mentioned test apparatus, when the device under test is tested in an extremely low temperature state, the temperature of the device room A is lowered, but the temperature of the device room B is normal room temperature. As the test machine, a room temperature test machine is also used. At this time, since the intermediate shaft 3 is cooled to a low temperature, the temperature becomes lower than the range of the room temperature specifications of the test machine, and the test machine is mechanically affected by heat. FIG. 2 is designed so as not to be affected by this heat. In FIG. 2, reference numeral 24 denotes a second airtight frame, one end of which is attached to a flange provided outside of the airtight frame 18 and is in contact with the shaft 5c protruding from the bearing frame 5a. The airtight seal 16 of the sealing device SL is attached via the seal holders 25, 26, etc., and one end of the flexible pipe joint 20 is airtightly attached to the flange protruding toward the outer periphery via a gasket or the like. . The other end of the flexible tube joint 20 is airtightly attached to a support flange 21 provided in the wall through hole via a gasket or the like. A temperature control chamber 30 sealed by an airtight sealing device SL is formed in the second airtight frame 24. An electric heater 27, a thermostat 28, an air supply / exhaust pipe 29 connected to two air supply / exhaust ports provided in the target are provided in the temperature control chamber 30.

During a high-low temperature environment test in a highland, when the room A on the side of the device under test is depressurized, dry air having a pressure slightly higher than the pressure in the room on the side of the testing device is circulated through the supply / exhaust pipe 29. In this case, even if a leak occurs in the contact type airtight seal 16, the high temperature air in the room on the test machine side will not leak to the depressurized 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 temperature or a low temperature, the intermediate shaft 3 exerts an influence on the side of the test device. When the temperature of the room under test is low, the electric heater 27 heats the shaft 5c so that the rolling bearing 5b can be kept within the specified temperature range of the electric dynamometer 5. The thermostat 28 controls the on / off of the electric heater 27 to control the temperature inside the second hermetic frame 24. When the room under test is heated to a high temperature, the temperature is generally within the specified temperature range of the test machine, so it is not necessary to cool the shaft 5c, but if cooling is required, an electric heater is required. A cooling means such as a cooling pipe may be provided instead of 27.

As described above, in the embodiment of FIG. 1, the airtight sealing device is provided on the side of the machine under test and the temperature control chamber is provided on the side of the test machine room. Good.

[0028]

[Effect of device]

 According to the present invention, as described above, the contact type airtight seal is attached to the airtight frame mounted on the bearing frame of the tester or the device under test coaxially with the shaft protruding from the bearing frame. Even if a relative displacement is generated between the test machine and the machine under test, and the wall that separates them, the effects of these relative displacements are all on the intermediate axis with both ends connected by constant velocity ball joints and the intermediate axis. The flexible pipe joint that is airtightly mounted between the support flange provided at the opening of the shaft wall through hole and the airtight frame absorbs the relative position of the projecting shaft and the contact-type airtight seal. It does not change, and it is possible to maintain a good air-sealing state, and it is possible to completely separate the room on the test machine side and the room under test from the room under test.

The support flange provided at the opening of the wall through hole of the intermediate shaft may be designed so that the flexible tube joint can be airtightly attached, and since it does not require attachment accuracy, it should be designed and manufactured without waiting for the completion of the wall. It is easy to cut by hand, and it can be easily attached to shorten the work 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 effects described above, the test condition on the side of the device under test is the test machine. Can be prevented from affecting. For example, in the cryogenic environment test of the device under test, by heating the shaft with an electric heater and keeping the bearing within the specified temperature range of the test device, there is no need to touch the test device. A low temperature environment test can be carried out.

Also, by circulating dry air having a pressure higher than the pressure in the room on the tester side in the second airtight frame, it is possible to reduce leakage due to a reduction in sealing force at the contact-type airtight seal portion. Even if the above occurs, it is possible to prevent the high-humidity air in the room on the test machine side from leaking to the room on the test machine side.

It has various practical effects such as the following.

[Brief description of drawings]

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

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

FIG. 3 is an overall explanatory diagram of an environment test device for a rotating machine.

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

[Explanation of symbols]

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

Claims (2)

[Scope of utility model registration request] 1. A test machine and a test machine of a rotating machine are installed with a wall in between, and a rotating machine is formed by connecting the test machine and the test machine by passing an intermediate shaft through a through hole formed in the wall. In an environmental testing device for a machine, an airtight frame surrounding the shaft is attached to the bearing frame on the wall side of the tester or the device under test, an airtight seal device is provided in the shaft insertion portion of the airtight frame, and the outer periphery of the airtight seal is provided. Environmental test of a rotary machine characterized in that one end of a flexible pipe joint was attached to a flange provided in the direction and the other end of the flexible pipe joint was airtightly attached to a support flange provided in the through hole of the wall. apparatus. 2. A second airtight frame, which surrounds a shaft with an airtight seal device to form a temperature control chamber, is attached to the wall side of the airtight frame, and the wall side and the wall of the second airtight frame penetrate. The environment testing device for a rotating machine according to claim 1, wherein a flexible pipe joint is provided between the support flanges of the holes.