Device Overview

1.1 Name and Model

Name: Micro-Electro-Mechanical Hydraulic Servo Pressure Testing Machine

Model: DYE-2000S

1.2 Overview of Functions: The system employs high‑precision digital servo valves with force closed‑loop control, enabling constant‑rate loading at a specified load rate. It boasts high control accuracy and excellent reliability, fully meeting the testing requirements for materials such as cement and concrete as stipulated in standards like GB, ISO, and ASTM—making it particularly well suited for applications that require long‑duration operational testing.

This instrument consists of four main components: an electro-hydraulic control box, a pressure sensor, a digital servo valve, and a pressure reducing valve.

Technical Parameters

Structural Overview

The testing machine consists of three main components: the main body, the hydraulic control box, and the force measuring instrument.

3.1 Body Section

The testing machine frame is composed of four vertical columns that connect the cylinder body to the upper crossbeam. The upper crossbeam of the testing machine is equipped with an adjustable lead screw, and the vertical height of the testing machine is electrically adjustable. It is fitted with a torque protection device, and the lower end of the lead screw is fitted with a ball seat that connects to the upper pressure plate. The lower pressure plate rests on the piston of the hydraulic cylinder; when the specimen comes into contact with the upper pressure plate, the ball seat on the upper pressure plate automatically adjusts to maintain balance, ensuring that the specimen remains level with the upper pressure plate. The lower pressure plate is engraved with positioning lines for the specimen—during testing, the specimen must be aligned with these lines. A dust‑proof housing is installed beneath the lower pressure plate to prevent…

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Prevent or minimize dust from entering the cylinder during piston movement, which could damage the cylinder body or oil seals. A sealing device is installed between the piston and the cylinder to prevent oil leakage; however, if a small amount of oil still leaks during operation, an annular oil groove is provided at the top of the cylinder body, connected to an oil drain passage that directs the leaked oil back to the main oil tank.

3.2 Hydraulic Control Section

The control box of this testing machine mainly consists of an oil tank, oil pump, oil filter, motor, and a fully automatic digital constant‑load system. The oil pump is a direct‑drive axial five‑plunger pump.

3.3 For details on the system functions, please refer to the pressure testing machine measurement and control software.

Installation of the Testing Machine

4.1 When hoisting the testing machine, thread the lifting wire through the lifting ring screw at the top of the lead screw.

4.2 The testing machine shall be installed on a sturdy foundation approximately 20 centimeters above the ground, with two anchor bolts pre‑embedded.

4.3 When installing the testing machine, use a 1/1000 box-type level to measure the plane of the lower pressure plate, ensuring that…

The lower pressure plate is in a horizontal position; if it is not level, adjust it using shims (place the shims under the nuts at the bottom of the upright posts).

Maintenance and upkeep

1. The testing machine shall be installed in a clean, dry environment with uniform temperature, free from vibrations and corrosive gas exposure.

2. The testing machine should be kept clean, and parts on the machine’s surface that lack a protective coating should be regularly oiled to prevent rust.

3. Use 46# anti-wear hydraulic oil.

4. The piston of the testing machine must not rise more than 30 mm. The control box of the testing machine is equipped with limit‑position calibration; when the arrow reaches the limit, the return oil valve should be immediately and slowly released to allow the piston to descend before restarting the motor for the next test.

Packing List