Photocoupler

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Rutting test machine: mainly consists of the following parts:

The test piece table is designed to securely hold test pieces of two different widths, 300mm and 150mm, ensuring a precise fit for standard-sized specimens.

The test wheel is made of solid rubber tires with an outer diameter of Φ200mm, a width of 50mm, and a rubber layer thickness of 15mm. The rubber hardness is measured in international standard units, and it should be maintained at 84±4 at 20°C and 78±2 at 60°C. The test wheel travels a distance of 230mm ± 10mm, with a round-trip rolling speed of 42 cycles per minute ± 1 cycle per minute (equivalent to 21 round trips per minute). The movement can be driven by a crank-link system, which allows the test bench to move while the wheel remains stationary, or by a chain drive that moves the wheel while keeping the test bench still.

Note: It is important to regularly check the rubber hardness of the tire. If it does not meet the required specifications, it must be replaced immediately to ensure accurate test results.

The loading device applies a contact pressure of 0.7MPa ± 0.05MPa between the test wheel and the specimen at 60°C. A total load of 78kg is applied, and the load can be adjusted as needed on both sides.

The test mode is constructed from steel plates, including a bottom plate and side plates. The inner dimensions of the test mold are 300mm in length, 300mm in width, and 50mm in thickness (manufactured in the laboratory). Alternatively, a 150mm-wide test piece can be cut on-site for testing purposes.

The deformation measuring device automatically detects rut deformation and records the resulting curve. Commonly used devices include LVDT (Linear Variable Differential Transformer), electric meters, or non-contact displacement sensors.

The temperature detection device includes temperature sensors, thermometers, and precision instruments capable of automatically detecting and recording the surface temperature of the test piece and the ambient temperature in the constant temperature room, with a precision of 0.5°C.

1.2 Constant Temperature Room: The rutting test machine must be placed inside a controlled environment. The room is equipped with heaters, air circulation systems, and automatic temperature control to maintain a stable temperature of 60°C ± 1°C (with the internal test piece temperature at 60°C ± 0.5°C). Additional temperatures may be used depending on specific requirements. This environment ensures proper insulation and testing conditions, with continuous automatic temperature recording.

1.3 Bench Scale: The scale has a capacity of 15kg, with a sensitivity of no more than 5g.

Zhonghao Bolian Instrument (Beijing) Instrument Equipment Co., Ltd.

Manager Jiang: 13910442308