Patent ID: 12241874

Reference signs in the attached figures:1, carrier;2, wedge-shaped rotating body;21, connecting shaft;3, pulse power supply;31, conductor;4, test object;5, driving shaft;51, first coupling;52, insulating gasket;53, second coupling;54, bearing;55, conducting ring;6, transmission shaft; and61, key slot.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present disclosure is further described in conjunction with the specific embodiments. The embodiments are merely used for illustrating the present disclosure without limiting the scope of the present disclosure.

Referring toFIG.1andFIG.2, the embodiment provides an electro-magneto-thermo-mechanical dynamic and synchronous loading device based on a wedge-shaped rotating body. The device comprises a carrier1, a wedge-shaped rotating body2and a pulse power supply3. The wedge-shaped rotating body2is positioned above the carrier1. The pulse power supply3is connected to the carrier1and the wedge-shaped rotating body2through conductors. The carrier1is used for supporting and fixing a test object4. The test object4is fixed on the carrier1through bolts or clamps. The top of the wedge-shaped rotating body2is connected to the output end of a driving shaft5through a transmission shaft6. The driving shaft5is used for driving the wedge-shaped rotating body2to rotate and can apply downward pressure. The wedge-shaped rotating body2can be pressed against the test object4and rotate on the surface of the test object4under the action of the driving shaft5. The pressure on the test object4is regulated by the driving shaft5. The wedge-shaped rotating body2rotates and forms a surface contact sliding motion with the test object4, and sliding friction is generated on the surface of the test object4. The carrier1, the wedge-shaped rotating body2and the test object4are all conductors.

According to the electro-magneto-thermo-mechanical dynamic and synchronous loading device based on a wedge-shaped rotating body in the embodiment, combined with a measuring system, the pulse current, the pulse voltage, and the surface temperature, stress, electromagnetic field and other signals of the test object4are measured in real time, and the signals are sampled at a high speed.

According to the electro-magneto-thermo-mechanical dynamic and synchronous loading device based on a wedge-shaped rotating body in the embodiment, the measuring equipment is controlled to send a time sequence control signal to the pulse power supply3and the driving shaft5, so that the required pressure is synchronously loaded by the pressurizing mechanism of the driving shaft5while the pulse current flowing through the test object4is met. Meanwhile, the wedge-shaped rotating body2is controlled to rotate at a high speed by the driving shaft5. During the high-speed rotating process of the wedge-shaped rotating body2, sliding friction in surface contact with the test object4is formed, resulting in a large amount of friction heat. Combined with a large amount of Joule heat and arc heat generated by the pulse current, the surface temperature of the test object4is increased rapidly under the combined action of the friction heat, Joule heat and arc heat. A great electromagnetic force is generated between the test object4and the wedge-shaped rotating body2due to the high pulse current. Combined with the pressure applied by the driving shaft5, and the friction force and thermal stress between the wedge-shaped rotating body2and the test object4, the strain of the test object4is increased rapidly, so that synchronous and dynamic loading in electro-magneto-thermo-mechanical multi-field coupling extreme conditions is realized. In addition, one planar test object4can be tested while the high-speed rotation of the wedge-shaped rotating body2is realized, so that the whole measured plane is loaded with the same load. Thus, the effective contact area between the test object4and the wedge-shaped rotating body2is enlarged, equivalently the test area is enlarged, so that the test approaches the actual application environment, and the data is more effective.

Referring toFIG.1,FIG.2andFIG.3, in the specific connecting structure of the wedge-shaped rotating body2and the driving shaft5, the output end of the driving shaft5is sequentially provided with a first coupling51, an insulating gasket52and a second coupling53, the insulating gasket52is sandwiched between the first coupling51and the second coupling53, and the other end of the second coupling53is connected to the transmission shaft6. A key slot61is formed in the transmission shaft6, the top of the wedge-shaped rotating body2is provided with a connecting shaft21, and the other end of the connecting shaft21is connected to the transmission shaft6.

Referring toFIG.1andFIG.2, further, an abrasion-resistant and high-temperature-resistant conducting ring55capable of adapting to a high-speed rotating friction environment is installed at the joint of the wedge-shaped rotating body2and the driving shaft5, and the conducting ring55is in sleeve connection with the driving shaft6through a bearing54. One electrode of the pulse power supply3is reliably connected to the wedge-shaped rotating body2through the conductor31, the conducting ring55and the driving shaft5, and the other electrode of the pulse power supply is reliably connected to the carrier1through the conductor31. The conductor31can withstand the electric force brought by the pulse current and the heat generated by the pulse current without being damaged.

Referring toFIG.1andFIG.2, further, the specific structure of the wedge-shaped rotating body2comprises a front side wall and a rear side wall which are gradually inclined and close to each other from top to bottom. The front side wall and the rear side wall are in line contact with the bottom surface of the wedge-shaped rotating body in a contracted manner. When the wedge-shaped rotating body rotates at a high speed, sliding friction in circular surface contact with the test object is formed.

Further, in the embodiment, the power of the driving mechanism of the driving shaft5meets light-load starting under the pressure conditions, and the time for the driving shaft5to reach the required rotating speed is not more than a specified value (usually in millisecond level). The performance of the pressurizing mechanism of the driving shaft5meets the pressure stability and accuracy under the condition of the wedge-shaped rotating body2high-speed rotation driven by the driving shaft5.

The embodiment further provides a test method of the electro-magneto-thermo-mechanical dynamic and synchronous loading device based on a wedge-shaped rotating body. The test method comprises the following steps: while the pulse power supply3meets the pulse current flowing through the test object4, loading the required pressure and driving the wedge-shaped rotating body2to rotate at a high speed by the driving shaft5, measuring the pulse current, the pulse voltage, and the surface temperature, stress, electromagnetic field and other signals of the test object4in real time, and regulating and controlling the output pulse current by the pulse power supply3, the applied pressure of the driving shaft5and the rotating speed of the wedge-shaped rotating body2to realize synchronous and dynamic loading in electro-magneto-thermo-mechanical multi-field coupling extreme conditions.

Although the present disclosure has been described in detail with reference to the foregoing embodiments, for those skilled in the art, modifications may still be made to the subject matter recited in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present disclosure shall fall within the protection scope of the present disclosure.