JP3035216B2 - Vibration environment test equipment with seal removable - Google Patents

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 environmental test conditions such as temperature, humidity, airtightness, and a certain level of pressure resistance.

[0002]

2. Description of the Related Art As a conventional vibration environment test apparatus, for example, as described in Japanese Patent Application Laid-Open No. 2-46889, a vibration generator is installed under a thermostatic chamber, and a vibration is generated through an opening at the bottom of the thermostatic chamber. Insert the shaft, place the sample on the auxiliary diaphragm at the top, and in a device that can perform environmental tests while applying vibration to the sample, either the vibration shaft, the auxiliary diaphragm, or the flange fixed to the vibration shaft and the bottom of the thermostatic bath A device in which a tire-like seal member is interposed and the bead portion is fixed to the side of the vibration shaft or the like, and a seal is formed or released by injecting or discharging air into the seal member. It is known.

However, in this device, the air supply pipe for injecting or discharging air must be attached or detached in a narrow place where the bottom of the thermostat and the vibrator are associated with each other. Work is not easy, the seal member vibrates with the vibrating shaft, which affects the frequency and amplitude of the vibrating shaft, reduces the accuracy of the vibration test, shortens the life of the seal member, and reduces the life of the seal member. Since the bead portion is fixed (fixed), there is a problem that the work and the attaching / detaching work when replacing the seal member are troublesome.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and allows easy attachment and detachment and replacement of a sealing member, has a long life, and the sealing member affects the vibration characteristics of the vibrating body. An object of the present invention is to provide a vibration environment test apparatus capable of performing a vibration test with high accuracy without giving a vibration.

[0005]

According to the present invention, there is provided a vibration environment test apparatus in which an environmental test apparatus and a vibrator are combined in a vertical positional relationship. Vibration of the vibrating body of the vibrator is transmitted from the opening at the bottom of the test device, and vibration is given to the DUT in the test room. An air spring supporting the vibrator, and a flat bottom flat surface around the opening and a flat vibrator flat surface around the vibrator mounted so as to surround the opening and the vibrator. A seal member whose height is greater than or equal to the gap between the bottom flat surface and the vibrator flat surface when air is filled in the air spring, and when the air of the air spring is deflated. Bottom flat surface and the vibrator A seal member is lower than the distance between Tanmen, characterized by having a.

According to a second aspect of the present invention, in addition to the above, the environmental test apparatus is configured to be movable in a horizontal direction.

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

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an entire configuration of a slide type vibration constant temperature bath which is an example of a vibration environment test apparatus, and FIG. 2 shows an enlarged view of a seal member in FIG. The vibration thermostat is configured such that a thermostat 1 as an environmental test device and a vibrator 2 are combined in a vertical positional relationship,
Vibration of the vibration table 21 which is a vibrator of the vibrator 2 is transmitted from the opening 11b of the bottom portion 11a of the main body portion 11 of the thermostatic chamber 1 to give a vibration to the sample W which is the test object in the test chamber 11c to perform an environmental test It is a device that can be provided with an air spring 3 and a seal member 4.

The thermostatic chamber 1 is provided with a refrigerator, electrical components, instruments and the like on one side of the main body portion 11 and an auxiliary panel 12 for supporting the main body portion 11 at a fixed height position. It has a support frame 13 for supporting the part 11. Wheels 12a and 13a are attached to the auxiliary panel 12 and the support frame 13, respectively. The wheels roll on rails 5 fixed to the installation surface in a direction perpendicular to the plane of the drawing, so that the temperature-controlled bath 1 becomes horizontal. It can be moved in any direction. Therefore, the combination of the thermostat 1 and the vibrator 2 and its release are easy.

The interior of the main body portion 11 is surrounded by a heat insulating wall 11d, and an air conditioning room (not shown) is provided which is separated from the test room 11c, in which a heater and a cooler (usually a refrigerator) are provided. Evaporator), a humidifier, an air-conditioning air circulation blower, and the like are provided so that the test purpose can be achieved as required. Reference numeral 11e is a support frame when only the main body portion 11 is installed alone. When an environmental test is performed using only the thermostatic chamber 1, the opening 1 is opened and closed or provided with a suitable lid.
1b is covered.

The vibrator 2 is a device that generates vibrations in three directions, for example, X, Y, and Z, and applies 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 the support 6 and the air spring 3. Reference numeral 7 denotes a support frame that supports the vibrator when it is not used. A vibrator flat surface 22 is formed around the vibrating table 21 above the vibrator 2 so as to face the bottom of the thermostatic oven. An intermediate table 23 protruding to the inside of the thermostat 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. When a vibrator is used, compressed air of an appropriate pressure is injected through the valve 31 and the valve 31. Is closed, and 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 injection and discharge of air into and from the air spring are performed on the installation surface of the vibrator which is not related to the thermostat 1, the surrounding area is a wide open space, and the work is easy.

The seal member 4 surrounds the opening 11b and the vibrating body 21 between a flat bottom flat surface 11a-1 around the opening 11b and a flat vibrator flat surface 22 around the vibrating body 21. As shown in FIG. 2, a frame part 41 formed in a double annular shape around these parts, and a packing 42 as a contact part made of an elastic body such as rubber attached to the upper and lower sides thereof are provided. 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 an adiabatic space. And has the effect of maintaining the temperature conditions in the thermostat. 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 flat bottom surface 11.
The packing 42 is interposed between the a-1 and the vibrator flat surface 22, and shows a state where the packing 42 is in contact with both sides thereof, and its height is H. Vibrator flat surface 22 and bottom flat surface 11a-
The interval between 1, becomes H ₁ when the air springs 3 are supported by air put lift the vibration unit 2 becomes the H ₂ when the air is disconnected, the height H of the sealing member 4 is It has become and less than H ₂ in H ₁ or more. Then, the difference between the dimension H and H ₁ are usually each amount of compression of the packing 42 are set to be about 2 to 3 mm.

[0015] Such a vibrating thermostat is used as follows. The vibrator 2 is usually installed at a position where it can be combined with the thermostat 1, but when it is used for an independent vibration test and is installed at another place, the vibrator 2 is moved from the place when the vibration environment test is performed. Moved to a location. At this time,
No air is introduced into 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 operation is the only special operation for forming the seal, and the operation of 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 elastic member such as a bellows is fixed to one of the sides with a bolt or the like. A method of stretching the other end and fixing the other end with a bolt or the like is also conceivable. According to such a method, installation of the expansion and contraction member is a difficult operation in a place where the connection portion between the constant temperature bath and the vibrator is extremely narrow and is not directly accessible. No difficult work is required at all. In addition, the elastic member such as the bellows does not provide sufficient heat insulating properties.
As described above, by forming the heat insulating space by the frame portion 41, sufficient heat insulating properties are provided.

With the seal member 4 placed thereon, the thermostatic oven 1 is moved horizontally 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 thermostat. Therefore, the relationship between the two can be easily set.

Next, the intermediate table 23 is attached to the vibration table 21 by bolting or the like. This operation can be performed irrespective of the attachment of the seal member 4 and is therefore simple. Then, inflate the compressed air into the air spring 3. As a result, the position of the vibrator 2 is raised, the packing of the seal member 4 is pressed against 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 operation is originally an operation for supporting the vibrator 2 in a vibration-proof manner, and the operation automatically forms a seal. Therefore, as described above, the operation for forming the seal simply involves placing the seal member 4 on the flat surface 22 of the vibrator.

With only these operations, various tests in which vibration and environmental conditions are combined can be performed. When the vibrator is separated from the thermostat, the opposite operation is performed. That is, the intermediate table 23 is removed, the valve 32 of the air spring 3 is opened to release the air inside, the thermostat 1 is moved, and the seal member 4 is removed. Therefore, these operations are also very simple.

According to the vibration constant temperature bath of this embodiment, the sealing member 4
Does not contact the vibration table 21 at all, and therefore does not affect the vibration characteristics of the vibrator. When a multi-axis vibration test device capable of generating two-dimensional or three-dimensional vibration is used, such a non-contact seal is particularly effectively used.

In the above, an example has been shown in which the thermostatic bath 1 is movable in the horizontal direction. In this way, the attachment and detachment of the thermostat 1 and the vibrator 2 are facilitated, so that it is extremely easy to use the vibrator with various mechanical devices other than the thermostat, and use of the vibrator Rate can be improved.
In addition, it becomes easy to carry out a single test using only a constant temperature bath without performing a vibration test. However, even for a device in which the constant-temperature bath cannot be moved horizontally and is installed on a support base on which it is fixed, the air spring and the seal member allow the seal member to be easily attached and detached and the performance of the vibrator to be improved. Since the effect of maintaining is exhibited, the present invention can be effectively applied.

[0022]

As described above, according to the present invention, in the first aspect of the present invention, the vibrator is supported by the air spring, so that the vibrator can be supported in a vibration-proof manner, and the vibrator can be moved up and down by taking in and out of air. The distance between the flat surface of the vibrator and the flat surface at the bottom of the environmental test apparatus can be changed. A sealing member having an intermediate height of the changing interval and capable of surrounding the opening and the vibrator of the vibrator between the two flat surfaces is provided. If the member is placed on the flat surface of the vibrator and air is supplied to the air spring to put the vibrator in use, a seal is automatically formed between the opening and the vibrator. When the vibrator is not used, the sealing state can be released only by blowing air.

According to such a vibration environment test apparatus, a seal can be formed simply by placing the seal member on a flat surface of the vibrator without fixedly attaching a seal member to any part of the environment test apparatus and the vibrator. Therefore, the work for attaching and detaching the seal member and forming the seal is almost unnecessary. Further, repair and replacement of the seal member are also extremely easy. Further, the vibrator can be supported in a vibration-proof manner by the air spring.

Further, since the seal member does not contact the vibrating body itself but does contact the surrounding non-vibrating flat surface, the vibration frequency and amplitude of the vibrating body are not affected by the physical properties of the seal member. Therefore, an accurate environmental test can be performed under the target vibration conditions. And since a large repetitive stress due to vibration is not applied to the seal member, the life of the seal member is extended. In addition, since the sealing state can be easily released, the sealing member is released from the compression deformation state when the vibration test is not performed, 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 apparatus is configured to be movable in the horizontal direction, the environmental test apparatus can be moved between a position at the time of the vibration test and a position distant therefrom. Can be easily moved. As a result, it is possible to open the upper part of the vibrator and perform a vibration test of the test object which does not need to be given a special environmental condition or which does not enter the test room. In addition, it becomes extremely easy to combine the vibrator with a mechanical device or the like installed in another place and perform a vibration test on those devices. Further, it becomes easy to perform the environmental test device unit test. The horizontal movement of the environmental test apparatus can be easily performed, for example, by supporting the apparatus with casters or the like. Then, when the vibrator is lowered by bleeding air from the air spring, the sealing state is released only by that, and the horizontal movement of the environmental test apparatus becomes possible.

According to the third aspect of the present invention, since the seal member is formed by the frame portion formed in a double annular shape and the contact portions made of elastic bodies attached to both ends in the height direction thereof, By making the annular portion a heat insulating space, the heat insulating property can be improved. Note that, depending on the intended 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 the drawings]

FIG. 1 is a front view showing the entire structure of a vibration constant temperature bath as 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]

REFERENCE SIGNS LIST 1 constant temperature bath (environmental test apparatus) 2 vibrator 3 air spring 4 seal member 11 a bottom 11 a-1 flat bottom surface 11 b opening 11 c test chamber 21 vibration table (vibration body) 22 vibration body flat surface 41 frame body part 42 packing (contact) Part) H Height of sealing member H ₁ , H ₂ Distance between flat surfaces W Sample (DUT)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01M ^7/ 02-7/06 G01M 19/00 G01N 17/00

Claims (3)

(57) [Claims] 1. A vibration environment test apparatus in which an environmental test apparatus and a vibrator are combined in a vertical positional relationship. The vibration of a vibrating body of the vibrator is transmitted from an opening at the bottom of the environmental test apparatus to be received in a test chamber. In a vibration environment test apparatus capable of performing an environmental test by applying vibration to a test object, an air spring supporting the vibrator when air can be taken in and out, and a flat bottom flat surface around the opening, and A seal member mounted so as to surround the opening and the vibrating body between a flat vibrator flat surface around the vibrating body and a height of the sealing member when air is filled in the air spring. A seal member that is equal to or more than the gap between the bottom flat surface and the vibrating body flat surface and is lower than the gap between the bottom flat surface and the vibrating body flat surface when the air of the air spring is evacuated. 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 sealing member has a frame portion formed in a double annular shape and contact portions made of elastic bodies attached to both ends in the height direction of the frame portion. The vibration environment test apparatus according to claim 1.