Device Overview

1.1 Name and Model

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

Model: DYE-3000S

1.2 Implementation Standards: GB, ISO, ASTM

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

System components: pressure sensor, digital servo valve, and 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, while a lead screw allows for adjustment of the machine’s vertical height. The lower pressure plate is mounted on the piston of the hydraulic cylinder; when the specimen comes into contact with the upper pressure plate, the spherical seat on the upper pressure plate automatically adjusts to maintain balance, ensuring that the specimen remains perfectly horizontal relative to the upper pressure plate. The lower pressure plate is engraved with positioning lines for the specimen—during testing, the specimen must be aligned precisely with these lines. A dust‑proof housing is installed beneath the lower pressure plate to prevent or minimize dust from entering the cylinder during piston movement, thereby protecting the cylinder body and oil seals from damage. A sealing device is installed between the piston and the cylinder to prevent oil leakage; however, if a small amount of oil does leak past the piston during operation, an annular oil groove at the top of the cylinder body provides a dedicated oil‑drainage channel to direct 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.

4.3 When installing the testing machine, use a 1/1000 frame level to measure the plane of the lower pressure plate and ensure that the lower pressure plate is perfectly horizontal. If it is not level, adjust it using shims (place shims under the nuts at the bottom of the upright columns).