JPH09304221A - Seal-mounting removing-type vibration environment tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an apparatus wherein mounting/remove and replacement of a sheal is easy, a service life is long and no influence is applied to vibration characteristics by providing a seal member whose height is a distance or longer between a bottom flat face and a vibrator flat face with air put into an air spring and shorter than a distance between them when air is removed. SOLUTION: A seal member 4 is mounted to surround an opening 11b and a vibrator 21 between a bottom flat face 11a-1 of the opening 11b and a vibrator flat face 22 and has a packing 42 as a contact comprising a frame part 41 formed in a double ring and elastic bodies on and under it. The seal member 4 is mounted on the flat face 22 of the vibrator 2. A distance between the vibrator flat face 22 and the bottom flat face 11a-1 is H1 when air is put into an air spring 3 for raising and supporting the vibrator and H2 when air is removed, wherein a height H of the seal member 4 is H1 or longer and shorter than H2 . A difference between sizes H and H1 is set to a compression amount of approximately 2 to 3mm of the packing 42. The frame part 41 forms a heat- insulated space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration environment test apparatus capable of performing a test in which vibration is combined with any one or a plurality of environment test conditions such as temperature, humidity, airtightness, and pressure resistance to some extent.

[0002]

2. Description of the Related Art As a conventional vibration environment testing apparatus, for example, as described in Japanese Patent Application Laid-Open No. 2-46889, a vibration generator is installed under a constant temperature chamber and a vibration is generated from an opening at the bottom of the constant temperature chamber. Insert the shaft, place the sample on the auxiliary vibration plate on the top, and in the device that can perform environmental testing while giving vibration to the sample, select either the vibration shaft, the auxiliary vibration plate, or the flange fixed to the vibration shaft and the bottom of the constant temperature bath. A device in which a bead portion is fixed to the side of the vibrating shaft or the like by interposing a tire-like seal member between them, and the seal is formed or released by injecting or discharging air inside the seal member. It is known.

However, in this device, since the air supply pipe for injecting or discharging air must be attached and detached in a narrow space where the bottom of the constant temperature bath and the vibrator are engaged, the formation and release of the seal must be performed. Work is not easy, because the seal member vibrates together with the vibrating shaft, it affects the vibration frequency and amplitude of the vibrating shaft and reduces the accuracy of the vibration test, the life of the seal member is short, and the seal member Since the bead portion is fixed (fixed), there is a problem that the work and the attachment / detachment work when the seal member is replaced are troublesome.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems in the prior art, allows easy attachment / detachment and replacement of the seal member, has a long life, and affects the vibration characteristics of the vibrating body. It is an object of the present invention to provide a vibration environment test apparatus that can perform a vibration test with high accuracy without giving a vibration.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a vibration environment test apparatus in which an environment test apparatus and a vibrator are combined in a vertical positional relationship. In the vibration environment test equipment that can transmit and receive the vibration of the vibrating body of the vibrator from the opening on the bottom of the test equipment to give the vibration to the DUT in the test chamber and perform the environmental test, An air spring supporting the vibrator, a flat bottom flat surface around the opening, and a flat vibrator flat surface around the vibrator are mounted so as to surround the opening and the vibrator. A sealing member whose height is equal to or greater than the distance between the flat surface of the bottom portion and the flat surface of the vibrating body when air is introduced into the air spring, and when the air of the air spring is removed. Bottom flat surface and the vibrating body A seal member is lower than the distance between Tanmen, characterized by having a.

In addition to the above, the invention of claim 2 is characterized in that the environment testing device is configured to be movable in the horizontal direction.

According to a third aspect of the present invention, in addition to the features of the first aspect, the seal member is attached to a frame portion formed in a double annular shape and both ends of the frame portion in the height direction. And a contact portion formed of an elastic body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the entire construction of a slide type vibration thermostatic chamber which is an example of a vibration environment test apparatus, and FIG. 2 shows an enlarged view of the seal member portion of FIG. In the vibration constant temperature chamber, the constant temperature chamber 1 as an environmental test device and the vibrator 2 are combined in a vertical positional relationship,
Environmental test by transmitting the vibration of the vibration table 21 which is the vibrating body of the vibrator 2 from the opening 11b of the bottom portion 11a of the main body 11 of the constant temperature chamber 1 to give vibration to the sample W as the DUT in the test chamber 11c. It is a device that can be manufactured, and includes an air spring 3 and a seal member 4.

The constant temperature bath 1 is provided with a refrigerator, electric components, measuring instruments and the like on one side of the main body portion 11, and also an auxiliary board 12 for supporting the main body portion 11 at a constant height position and a main body on the opposite side thereof. It has a support frame 13 for supporting the part 11. Wheels 12a and 13a are attached to the auxiliary board 12 and the support frame 13, respectively, and these wheels roll on rails 5 fixed to the installation surface in a direction perpendicular to the paper surface in the figure, so that the constant temperature bath 1 becomes horizontal. It is movable in any direction. Therefore, it is easy to combine the constant temperature bath 1 and the vibrator 2 and release them.

The inside of the main body portion 11 is surrounded by a heat insulating wall 11d, and although not shown, there is provided an air-conditioning chamber which is separated from the test chamber 11c, in which a heater and a cooler (usually a refrigerator) are provided. Evaporator), a humidifier, and an air-conditioning air circulation blower are arranged so that the test purpose can be achieved as necessary. Reference numeral 11e is a support frame when the main body portion 11 alone is installed. When conducting an environmental test using only the constant temperature bath 1, use an appropriate lid that can be opened or closed or placed separately.
1b is covered.

The vibrator 2 is a device for generating vibrations in three directions of X, Y and Z, and applying a single vibration in each direction or a combined vibration thereof to the sample W to perform a vibration test. It is vibration-proof supported on the surface via a support base 6 and an air spring 3. Reference numeral 7 is a support frame that supports the vibrator when it is not used. A vibrating plate flat surface 22 is formed around the vibrating table 21 above the vibrating device 2 so as to face the bottom part of the constant temperature bath. An intermediate table 23 protruding to the inside of the constant temperature bath is attached to the vibration table 21 by bolting or the like, and the sample W is fixed or placed thereon.

The air spring 3 is provided with a valve 31 and an air injection / exhaust port 32 so that air can be taken in and out, and when a vibrator is used, compressed air having an appropriate pressure is injected through them to make the valve 31. When the vibrator is not used, the valve 31 is opened to discharge the internal air. When the air is discharged, the position of the vibrator is lowered and the vibrator is supported by the support frame 7. Since the air is injected into and discharged from the air spring on the installation surface of the vibrator that is not related to the constant temperature bath 1, the space is wide open and the work is easy.

The seal member 4 surrounds the opening 11b and the vibrating body 21 between the flat bottom flat surface 11a-1 around the opening 11b and the flat vibrating machine flat surface 22 around the vibrating body 21. As shown in FIG. 2, the frame member 41 is attached around these and has a double annular shape, and a packing 42 as a contact part made of an elastic body such as rubber attached above and below the frame part 41. Since the inside of the frame portion 41 is closed and the sealing member 4 does not move even if the vibration table 21 moves, the air inside the closed portion does not flow except by natural convection, and this portion forms a heat insulating space. However, it has the effect of maintaining the temperature conditions in the constant temperature bath. If the space is filled with a heat insulating material, the heat insulating effect can be further improved.

In FIG. 2, the sealing member 4 has a bottom flat surface 11
The packing 42, which is interposed between the a-1 and the flat surface 22 of the vibrator, is in contact with both sides of the packing 42, and its height is H. Vibrator flat surface 22 and bottom flat surface 11a-
The distance from ₁ is H ₁ when air is introduced into the air spring 3 and the vibrator 2 is being lifted and supported, and is H ₂ when air is deflated, but the height H of the seal member 4 is , H ₁ or more and lower than H ₂ . The difference between the dimensions H and H ₁ is usually set so that the compression amount of each packing 42 is about 2 to 3 mm.

Such an oscillating thermostat is used as follows. The vibrator 2 is usually installed at a position where it can be combined with the constant temperature bath 1. However, when it is used for an independent vibration test and installed at another place, the vibration environment test is performed from that place when the vibration environment test is performed. Moved to the position. At this time,
Air is not put in the air spring 3, and the vibrator 2 is supported by the support frame 7. Then, the seal member 4 is placed on the flat surface 22 of the vibrator. As described below, this work is the only special work for forming the seal, and it can be said that the work for attaching and detaching the seal is almost unnecessary.

As a method of forming a seal between the non-vibrating portion between the constant temperature bath and the upper part of the vibrator, one end of an expansion / contraction member such as a bellows is fixed to one of the sides with a bolt or the like, and It is also conceivable to extend the other end side and fix it to the other side with a bolt or the like. According to such a method, the attachment of the expansion and contraction member becomes a difficult work in an extremely narrow and inaccessible place of the connection portion between the constant temperature bath and the vibrator. Difficult work is completely eliminated. In addition, although the elastic member such as the bellows cannot obtain sufficient heat insulating property, the seal member 4 of the present invention is
As described above, by forming the heat insulating space in the frame body portion 41, sufficient heat insulating properties are provided.

With the seal member 4 mounted, the constant temperature bath 1 is horizontally moved to a predetermined position on the vibrator 2, and the position is fixed by an appropriate method. At this time, as shown in FIG. 2, the spacing between the flat surfaces 22 and 11a-1 is greater than the height H of the sealing member has become H _2, have lowered the upper end position of the seal member 4, the seal member 4 Does not hinder the movement of the constant temperature bath. Therefore, the relative position of the two can be easily set.

Next, the intermediate table 23 is attached to the vibrating table 21 by bolting or the like. This work is easy because it can be performed independently of the attachment of the seal member 4. Then, put compressed air into the air spring 3 and inflate it. As a result, the position of the vibrator 2 is raised, the packing of the seal member 4 is brought into pressure contact with both flat surfaces 22 and 11a-1 with an appropriate pressure, and the atmosphere in the test chamber 11c of the thermostatic chamber is sealed. This work is originally a work for supporting the vibrator 2 in a vibration-proof manner, and it automatically acts to form a seal. Therefore, as described above, the work for forming the seal simply involves placing the seal member 4 on the flat surface 22 of the vibrator.

With just this work, various tests combining vibration and environmental conditions can be carried out. This is the opposite operation when separating the vibrator and the constant temperature bath. That is, the intermediate table 23 is removed, the valve 32 of the air spring 3 is opened to remove the internal air, the constant temperature bath 1 is moved, and the seal member 4 is removed. Therefore, these operations are also extremely simple.

According to the vibration thermostatic chamber of this example, the sealing member 4
Does not contact the vibration table 21 at all, so that it does not affect the vibration characteristics of the vibrator. When using a multi-axis vibration test apparatus capable of generating two-dimensional or three-dimensional vibration, such a non-contact seal is particularly effectively used.

In the above, the example in which the constant temperature bath 1 is movable in the horizontal direction has been shown. In this way, the thermostat 1 and the vibrator 2 can be easily attached and detached, so that it becomes extremely easy to use the vibrator for various mechanical devices other than the thermostat, and use of the vibrator The rate can be improved.
Further, it becomes easy to carry out an independent test only in a constant temperature bath that does not undergo a vibration test. However, even for a device in which the constant temperature chamber cannot be moved horizontally and is installed on a fixed support table, the air spring and the seal member facilitate the attachment and detachment of the seal member and the performance of the vibrator. Since the effect of maintenance is exhibited, the present invention can be effectively applied.

[0022]

As described above, according to the present invention, in the first aspect of the invention, since the vibrator is supported by the air spring, the vibrator can be supported by vibration isolation, and the vibrator can be moved up and down by taking air in and out. The distance between the flat surface of the vibrator and the flat surface of the bottom of the environmental testing device can be changed. Then, since a seal member having an intermediate height of this changing interval and enclosing the opening and the vibrating body of the vibrator between the both flat surfaces is provided, the environment testing device and the vibrator are combined to form a seal. By placing the member on the flat surface of the vibrator, when air is put into the air spring to put the vibrator into a use state, a seal is automatically formed between the opening and the vibrator. Further, when the vibrator is not used, the sealed state can be released only by blowing out air.

According to such a vibration environment test apparatus, a seal can be formed by simply placing the seal member on the flat surface of the vibrator without fixing the seal member to any part of the environment test apparatus or the vibrator. Therefore, the work for attaching / detaching the seal member and forming the seal is almost unnecessary. In addition, repair and replacement of the seal member are extremely easy. Furthermore, the vibration can be supported by the air spring for vibration prevention.

Further, since the seal member does not contact the vibrating body itself but the flat surface around which the vibrating body does not vibrate, the physical properties of the seal member do not affect the frequency or amplitude of the vibrating body. Therefore, it is possible to perform an accurate environmental test under desired vibration conditions. Further, since the seal member is not subjected to a large repetitive stress due to vibration, the life of the seal member is extended. Further, since it is easy to release the sealed state, by releasing the sealed state when the vibration test is not performed, the seal member can be released from the compression deformed state and the good sealing property can be maintained.

According to the second aspect of the present invention, in addition to the above, since the environmental test device is configured to be movable in the horizontal direction, the environmental test device is provided between the position at the time of the vibration test and the position away from it. Easy to move. As a result, it is possible to open the upper part of the vibrator and perform a vibration test of the DUT that does not need to be provided with special environmental conditions or the DUT that does not enter the test chamber. In addition, it becomes extremely easy to combine a vibrator with a mechanical device or the like installed in another place and to perform a vibration test of those devices. Further, it becomes easy to carry out the environmental test device unit test. The horizontal movement of the environmental test device can be easily performed by supporting it with casters or the like. Then, when the air of the air spring is discharged to lower the vibrator, the sealed state is released only by that, so that the environmental test device can be moved horizontally.

According to the third aspect of the invention, since the seal member is formed of the frame portion formed in a double annular shape and the contact portions made of the elastic body attached to both ends in the height direction thereof, the double member is formed. The annular portion can be used as a heat insulating space to improve heat insulating properties. Note that depending on the desired performance of the environmental test device, the heat insulation performance can be further improved by filling the double annular portion with a heat insulating material.

[Brief description of drawings]

FIG. 1 is a front view showing the overall structure of a vibration thermostatic chamber which is an example of a vibration environment test apparatus to which the present invention is applied.

FIG. 2 is an enlarged view of a portion of the seal member.

[Explanation of symbols]

1 Constant Temperature Chamber (Environmental Test Equipment) 2 Vibration Machine 3 Air Spring 4 Sealing Member 11a Bottom 11a-1 Bottom Flat Surface 11b Opening 11c Test Chamber 21 Vibration Table (Vibration Body) 22 Vibrating Body Flat Surface 41 Frame Body Part 42 Packing (Contact) H) Seal member height H ₁ , H ₂ Distance between flat surfaces W Sample (DUT)

Claims (3)

[Claims] 1. A vibration environment test apparatus in which an environment test apparatus and a vibrator are combined in a vertical positional relationship, wherein the vibration of a vibrating body of the vibrator is transmitted from an opening at the bottom of the environment test apparatus and the vibration test is performed in a test chamber. In a vibration environment test device capable of giving an environment test by applying vibration to a test object, an air spring capable of taking in and out air and supporting the vibrator when entering air, a flat bottom flat surface around the opening, and the above-mentioned A seal member mounted so as to surround the opening and the vibrating body between the flat surface of the vibrating body around the vibrating body, the height of which is when the air spring is filled with air. A seal member having a distance equal to or greater than the distance between the bottom flat surface and the vibrator flat surface and lower than the distance between the bottom flat surface and the vibrator flat surface when the air of the air spring is deflated. Characterized by having Vibration environment test equipment that. 2. The vibration environment test apparatus according to claim 1, wherein the environment test apparatus is configured to be movable in a horizontal direction. 3. The seal member has a frame body portion formed in a double annular shape, and contact portions made of elastic bodies attached to both ends of the frame body portion in the height direction. The vibration environment test apparatus according to claim 1.