CN206223585U - A kind of tangential fretting abrasion test device of Piezoelectric Ceramic - Google Patents

Abstract

The utility model discloses a tangential fretting wear test device driven by piezoelectric ceramics. It includes a base, a column, a piezoelectric ceramic drive table, an upper fixture, a force sensor, a loading mechanism, a counterweight, a stud, a voltage control and a data acquisition device, and is characterized in that the base is fixed with a piezoelectric ceramic table and The column, the lower sample is installed on the piezoelectric ceramic drive workbench, the piezoelectric ceramic workbench can generate a reciprocating motion with a certain amplitude, frequency and waveform through the computer control of the voltage control and data acquisition device, the upper fixture and force The sensors are connected, and the force sensor is installed directly under the loading mechanism, so that the loading mechanism is passed through the column and can freely move up and down along the column as a guide rail. The purpose of the utility model is to provide a tangential fretting wear test device driven by piezoelectric ceramics, which has the advantages of simple structure, high control and test precision, and accurate and reliable test data.

Description

A Tangential Fretting Wear Test Device Driven by Piezoelectric Ceramics

technical field

The utility model relates to a tangential fretting wear test device driven by piezoelectric ceramics, which belongs to the technical field of fretting tribology in mechanical engineering.

Background technique

Piezoelectric ceramic driver uses the principle of inverse piezoelectric effect to stack and package ceramic sheets and internal electrodes, and apply voltage to the electrodes to generate displacement. It is a device that converts electrical energy into mechanical energy. Compared with other servo mechanisms, it has the characteristics of small size, high displacement resolution, fast response speed, large output force, high energy conversion efficiency, no heat generation, relatively simple voltage control method, etc., especially suitable for high precision of small displacement and a motion system with a high response frequency.

Fretting refers to the extremely small amplitude (micron level) motion that occurs between two contacting objects, usually occurring in a vibrating environment with approximately tightly fitted contact surfaces. Under the action of fretting, friction and wear will occur on the surfaces of the two contacting bodies, resulting in adverse effects such as occlusion and loosening between tight mechanical components. At the same time, fretting can also accelerate the initiation and expansion of cracks, causing fatigue fracture and failure of components . Fretting phenomenon widely exists in many important industrial sectors, and has become one of the main causes of failure of some key matching parts. Therefore, according to the actual working conditions of the component, the simulation study of the wear mechanism of the component under the condition of fretting plays an extremely important role in improving the anti-fretting wear performance of the material and optimizing the design of the mechanism.

Experimental research is a very important method to study the fretting wear performance of materials. At present, the commonly used fretting wear test equipment can be mainly divided into electromagnetic type, mechanical type and electro-hydraulic servo type. Fretting wear using these three displacement driving forms There are some unfavorable factors in the actual engineering application of the testing machine. For example, the electromagnetic type has disadvantages such as poor displacement control stability and small excitation force, the mechanical type has disadvantages such as low degree of automation and poor precision, and the electro-hydraulic servo type has disadvantages High, bulky and other shortcomings. Therefore, it is of great significance to develop a new type of fretting wear test device with simple structure, good control stability, high precision and high response frequency.

Utility model content

The purpose of this utility model is to provide a tangential fretting wear test device driven by piezoelectric ceramics, which has the advantages of simple structure, easy operation, high control and test precision, accurate and reliable test data, etc. Fretting wear test of conditions and materials.

The technical scheme that the utility model realizes above-mentioned purpose is:

A tangential fretting wear test device driven by piezoelectric ceramics, including a base, a column, a piezoelectric ceramic drive table, an upper fixture, a force sensor, a loading mechanism, a counterweight, a double-ended stud, voltage control and data acquisition device; the base is fixed with a piezoelectric ceramic driving table and a column, and the lower sample is installed on the piezoelectric ceramic driving table, and the piezoelectric ceramic driving table can generate a certain amplitude and frequency through a computer-controlled voltage control and data acquisition device. and waveform reciprocating motion; the upper fixture clamps the upper sample, the upper fixture is connected to the force sensor, the force sensor is installed directly below the loading mechanism, the loading mechanism is passed by the column and can move freely up and down with the column as the guide rail, double-headed The lower end of the stud is connected with the loading mechanism, the upper end of the double-ended stud is provided with a fixed nut, and the counterweight is fixedly installed directly above the loading mechanism through the double-ended stud and the nut.

Further, the force sensor is installed directly under the loading mechanism with screws.

Further, the upper clamp is installed directly under the force sensor with screws.

Further, the loading mechanism is connected with the studs.

Further, the counterweight is fixed between the loading mechanism and the double-ended studs through nuts, and the weight of the counterweight needs to be determined according to the normal load used in the test.

Further, the piezoelectric ceramic drive table is fixed directly above the base with screws.

Further, the voltage control and data acquisition device is connected to a computer.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. The utility model can truly simulate the fretting wear behavior of different materials, with low cost and simple structure, and can accurately measure the normal load and collect the tangential friction force during the fretting wear process through the force sensor, so that it can accurately The influence of fretting parameters on the fretting damage evolution of the material surface was analyzed.

2. The utility model can realize the adjustable normal load, fretting amplitude, frequency and fretting displacement generation waveform, and can truly simulate the fretting wear test of components under different working conditions.

3. The utility model adopts piezoelectric ceramics to drive the workbench, which can ensure accurate fretting positioning, high precision, stable frequency, and can be used for ultra-long cycle times and ultra-long fretting wear tests.

4. The contact form between the upper sample and the lower sample of the utility model can be plane-to-plane contact, spherical-to-plane contact, spherical-to-spherical contact, cylindrical surface-to-plane contact or cylindrical surface-to-cylindrical surface contact.

Description of drawings

Fig. 1 is a front structural schematic view of an embodiment of the utility model.

detailed description

As shown in Figure 1, a tangential fretting wear test device driven by piezoelectric ceramics includes a base 1, a column 2, a piezoelectric ceramic drive table 3, an upper fixture 6, a force sensor 7, a loading mechanism 8, and a counterweight Block 9, double-ended stud 11, voltage control and data acquisition device 12; the base 1 is fixed with a piezoelectric ceramic driving table 3 and a column 2, and the piezoelectric ceramic driving table 3 is equipped with a lower sample 4, piezoelectric ceramic driving table 3 The ceramic drive table 3 can control the voltage control and the data acquisition device 12 through the computer 13 to generate a reciprocating motion of a certain amplitude, frequency and waveform; the upper clamp 6 holds the upper sample 5, and the upper clamp 6 is connected to the force sensor 7, The force sensor 7 is installed directly below the loading mechanism 8. The loading mechanism 8 is passed by the column 2 and can freely move up and down with the column 2 as a guide rail. The lower end of the double-ended stud 11 is connected with the loading mechanism 8. The nut 10 and the counterweight 9 are fixedly installed directly above the loading mechanism 8 through the stud 11 and the nut 10 .

Claims (7)

1. the tangential fretting abrasion test device of a kind of Piezoelectric Ceramic, it is characterised in that：Including base, column, piezoelectricity pottery Porcelain drives workbench, upper fixture, force snesor, load maintainer, balancing weight, studs, voltage control and data acquisition device, Described Piezoelectric Ceramic workbench and described column, described Piezoelectric Ceramic work are fixed with described base Lower sample is installed, described Piezoelectric Ceramic workbench can be controlled and number by the voltage described in computer controls on platform The reciprocating motion of certain amplitude, frequency and waveform is produced according to harvester, sample is clamped with described upper fixture, it is described Upper fixture is connected with described force snesor, and described force snesor is arranged on immediately below described load maintainer, and described adds Mounted mechanism is passed through and can freely up and down moved as guide rail with described column, described studs following by described column It is connected with described load maintainer, described studs top has fixing nut, and described balancing weight is by described double end Stud is fixedly mounted on directly over described load maintainer with nut.

2. the tangential fretting abrasion test device of a kind of Piezoelectric Ceramic as claimed in claim 1, it is characterised in that：It is described Force snesor be arranged on immediately below described load maintainer with screw.

3. the tangential fretting abrasion test device of a kind of Piezoelectric Ceramic as claimed in claim 1 or 2, it is characterised in that： Described force snesor underface screw is provided with described upper fixture.

4. the tangential fretting abrasion test device of a kind of Piezoelectric Ceramic as claimed in claim 1, it is characterised in that：It is described Load maintainer on be connected with described studs.

5. the tangential fretting abrasion test device of a kind of Piezoelectric Ceramic as described in claim 1 or 4, it is characterised in that Described balancing weight is fixed with by nut between described load maintainer and described studs, the weight of described balancing weight Amount needs to be determined according to the used normal load of experiment.

6. the tangential fretting abrasion test device of a kind of Piezoelectric Ceramic as claimed in claim 1, it is characterised in that described Piezoelectric Ceramic workbench be screwed directly over described base.

7. the tangential fretting abrasion test device of a kind of Piezoelectric Ceramic as claimed in claim 1, it is characterised in that described Voltage control be connected with data acquisition device with computer.