CN108333041A - Aging experimental device under the coupled action of moisture-heat-force - Google Patents

Abstract

The invention provides an aging experimental device under the action of wet-heat-force coupling, which comprises: providing a high-low temperature fatigue test box in a constant temperature or thermal cycle environment, a pressure test device, a loading control device and a humidifying device which are arranged in the test box and apply tension or pressure to a sample; the loading control device comprises a driving mechanism, a supporting mechanism and a loading mechanism, wherein the supporting mechanism comprises a base, a supporting column and a fixed seat, the driving mechanism is arranged at the lower end of the supporting mechanism and is connected with the hydraulic tank, the loading mechanism comprises a supporting plate, a guide column and a movable seat, the guide column vertically penetrates through the fixed seat, and an upper chuck and a lower chuck are respectively arranged on the lower surface of the movable seat and the upper surface of the fixed seat; the humidifying device is arranged between the upper chuck and the lower chuck and comprises a test tube, a rubber plug for sealing the lower part of the test tube and a cotton plug on the upper part of the test tube.

Description

Aging experimental device under the coupled action of moisture-heat-force

technical field

The invention relates to the field of material mechanics testing machines, in particular to an aging test device under the coupled action of moisture-heat-force.

Background technique

At present, there is no relevant aging experimental equipment in China for the evaluation of the mechanical properties of materials under the coupling of moisture-heat-force. The main reason is that the fixture of the sample is difficult to bear the high load.

The existing technology is based on the standard humidity and heat environment box controlled by microcomputer, and the sample holding and loading mechanism is set in the box, and an electronic extensometer and a laser extensometer are arranged to form a double displacement sensor. After collecting data, the collector is connected to the computer. However, electrochemical corrosion occurs between the specimen and the chuck, and the load that can be applied is limited.

Many existing technologies only consider the effect of thermal load or mechanical load, and many materials or products are subjected to the combined effects of moisture, heat and force in actual work. Although the existing experimental instruments are versatile, the applied load is limited, the experimental plan will be limited by the equipment, and the accuracy of the experimental operation process is difficult to guarantee.

Contents of the invention

According to the above-mentioned technical problems, an aging experimental device under the coupling action of moisture-heat-mechanical effect with high test accuracy and capable of effectively preventing electrochemical corrosion is provided. The technical means adopted in the present invention are as follows:

An aging test device under the coupled action of moisture-heat-force, including: a high-low temperature fatigue test chamber providing a constant temperature or thermal cycle environment, a pressure test device, and a load placed inside the test chamber to apply tension or pressure to the sample Control device, humidification device;

The loading control device includes a driving mechanism, a supporting mechanism and a loading mechanism. The supporting mechanism includes a base, a supporting column arranged on the base and a fixing seat at the upper end of the supporting column. The driving mechanism is arranged at the lower end of the supporting mechanism and is connected with the hydraulic pressure. The loading mechanism includes a support plate connected to the driving mechanism, a guide column fixed on the support plate, and a mobile seat fixed on the upper end of the guide column. The guide column vertically passes through the Through the fixed seat, the lower surface of the movable seat and the upper surface of the fixed seat are respectively provided with an upper chuck and a lower chuck;

The humidifying device is provided between the upper chuck and the lower chuck, and the humidifying device includes a test tube, a rubber stopper for sealing at the lower part of the test tube and a tampon at the upper part of the test tube;

The pressure testing device includes a computer connected to the high and low temperature fatigue test chamber and a load sensor arranged on the surface of the upper chuck. The electric control box receives the feedback from the load sensor, acts on the hydraulic tank and controls the flow so that the moving seat and the The force generated by the change of the distance between the fixed seats remains constant.

Further, a guide sleeve adapted to the guide post is provided on the guide post.

Further, a standard gasket is provided between the upper clamp, the lower clamp and the humidifying device.

The invention comprehensively considers the multi-field coupling effect of moisture-heat-force, controls the application of a relatively large load, has high test accuracy, and prevents electrochemical corrosion.

Based on the above reasons, the present invention can be widely promoted in the field of material mechanics testing machines.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a structural schematic diagram of the humidifying device of the present invention.

Fig. 3 is a top view of the humidifying device of the present invention.

In the figure: 1. High and low temperature fatigue test chamber, 2. Pressure test device, 3. Electric control box, 4. Hydraulic box, 5. Driving mechanism, 6. Base, 7. Support plate, 8. Guide column, 9. Guide Set, 10, chuck, 11, test tube, 12, test piece, 13, standard gasket, 14, load cell, 15, moving seat, 16, rubber stopper, 17, cotton plug, 18, fixed seat, 19, support column.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An aging test device under the coupled action of humidity-heat-force, including: a high-low temperature fatigue test chamber 1 providing a constant temperature or thermal cycle environment, a pressure test device 2, and a device placed inside the test chamber to apply tension or pressure to the sample Loading control device, humidification device;

Described loading control device comprises driving mechanism 5, supporting mechanism, loading mechanism, and described supporting mechanism comprises base 6, the support column 19 that is arranged on the base 6 and the fixing seat 18 of supporting column 19 upper ends, and described driving mechanism 5 is located at The lower end of the support mechanism is connected with the hydraulic tank 4, the loading mechanism includes a support plate 7 connected to the drive mechanism, a guide column 8 fixed on the support plate 7, and a guide column 8 fixed on the guide column 8 The movable seat 15 at the upper end, the guide column 8 vertically passes through the fixed seat 18, the guide column 8 is provided with a guide sleeve 9 adapted to the guide column 8, the lower surface of the movable seat 15 and the fixed seat The upper surface of 18 is respectively provided with an upper chuck 10 and a lower chuck 10;

The humidifying device is provided between the upper chuck 10 and the lower chuck 10, and the humidifying device includes a test tube 11, a rubber stopper 16 for sealing at the lower part of the test tube 11 and a tampon 17 at the upper part of the test tube. A standard gasket 13 is provided between the upper chuck 10 , the lower chuck 10 and the humidifier.

The electric control box 3 receives the feedback from the load sensor 14, thereby acting on the hydraulic tank 4 and controlling the flow to keep the application of force constant. The hydraulic tank 4 is equipped with a valve to adjust the flow, so as to control the magnitude of the applied force. 8 Apply tension or pressure, the test tube 11 is socketed with the test piece 12, the bottom of the test tube is sealed with a special rubber stopper 16, and the top is sealed with a cotton plug 17, and they are put into the chuck 10 to fix it together, so as to prevent the eccentricity of the test piece 12 during the stretching process and cause incorrect results. Accurate, fixed by adding standard spacers 13.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (3)

1. the senile experiment device under a kind of wet-coupling thermal and mechanical effect, which is characterized in that including：Constant temperature or thermal cycle ring are provided The high/low temperature fatigue test case in border, pressure test device and the load for applying pulling force or pressure to sample being placed in inside chamber Control device, humidifier；

The add load control includes driving mechanism, supporting mechanism and load maintainer, and the supporting mechanism includes pedestal, setting The fixed seat of support column and upper end of support column on pedestal, the driving mechanism are set to the lower end of supporting mechanism and and hydraulic fluid tank It is connected, the load maintainer includes the support plate being connected with the driving mechanism, the guide post being fixed in the support plate, Be fixed in the Mobile base of the guide post upper end, the guide post passes vertically through the fixed seat, the Mobile base lower surface and Fixed seat upper surface is respectively equipped with upper grip and lower collet；

The humidifier is equipped between the upper grip and the lower collet, the humidifier includes test tube, test tube lower part The tampon of rubber stopper and test tube top for sealing；

The pressure test device includes the computer being connected with the high/low temperature fatigue test case and is set to upper grip surface Load transducer, electric cabinet receives the feedback of the load transducer, act on hydraulic fluid tank and control flow make Mobile base with The power generated by distance change between fixed seat is kept constant.

2. the senile experiment device under wet-coupling thermal and mechanical effect according to claim 1, which is characterized in that the guiding The guide sleeve being adapted to guide post is provided on column.

3. the senile experiment device under wet-coupling thermal and mechanical effect according to claim 1, which is characterized in that the upper folder Gaskets are equipped between head, lower collet and the humidifier.