Bidirectional hydraulic tilt swing test bench

1、 Equipment Introduction:

The tilting and swinging test bench is mainly used to simulate the tilting and swinging environment of various mechanical, electrical and electronic products installed on ships, aircraft, moving artillery and other equipment, in order to determine the ability of the test piece to withstand the specified severity level of tilting and swinging and the integrity of the structure.

Tilt and sway tests are mainly applicable to water or aviation equipment, used to simulate the tilt or sway environment caused by manipulation, loading imbalance, and natural environment (such as wind and waves), and to assess the structural integrity and performance reliability of various related components of the equipment.

The inclined swing test bench can complete the following simulation tests:

Force imbalance test, including static imbalance and alternating test;

Shake test of container;

Simulation test of additional inertial dynamic load caused by oscillation.

Tilt and sway tests are also applicable to instruments and meters on military equipment such as armored vehicles and tanks, as well as human adaptability training for pilots and sailors.

The WS-RTS76-500 bidirectional hydraulic tilt swing test bench meets the requirements of relevant test standards such as GB/T2423.101 "Environmental Testing for Electrical and Electronic Products Part 2 Test Methods: Tilt and Swing" and GJB150.23-91 "Environmental Testing Methods for Military Equipment: Tilt and Swing Test".

2、 Functional Features

The WS-RTS76 series tilt swing test bench integrates our widely used parallel coupled hydraulic actuator, multifunctional controller, and mature and reliable application software, providing high-precision and high repeatability swing and tilt testing solutions for the test specimens.

Capable of conducting simulation tests for ocean waves and flight;

Modular design ensures consistency and compatibility of various functions, providing users with a one-stop integrated solution from hardware to software, from experimental consulting to optimized design;

Advanced control system: Fully automatic computer remote real-time control interface, the operator only needs to input simple numerical values to start the equipment and accurately complete the set test;

A powerful multi data computing system: After the experimental data in all directions is set, the computer automatically controls the hydraulic actuator to drive the table to swing or tilt to the set angle on time, with high accuracy and good repeatability;

Multiple control methods: In situations where automatic control is not required or automatic control fails, the equipment can still be manually controlled to complete the experiment;

Installation method: Installed on the floor of a standard mechanical industrial plant and connected to the foundation with anchor bolts;

A comprehensive measurement and control system: The setting window for experimental parameters is open to users, flexible to use, and has a wide coverage range. At the same time, control parameters can be adjusted in real time based on measured parameters;

Convenient and efficient result output system:

After the experiment is completed, the test report will be automatically generated and printed out. Mature and reliable testing software can provide users with definitions of testing types, parameter settings, running, stopping, data analysis and storage, as well as some auxiliary functions;

Multiple standard security alarm measures ensure the safe and reliable operation of the system;

　　The optional remote control function, fault diagnosis function, and various forms of safety protection barriers can meet the safety protection needs of users at different levels.

3、 Technical parameters

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4、 System composition and working principle

1. System composition

The tilting and swinging test bench consists of three main parts: the mechanical platform, hydraulic servo, and measurement control. The system diagram is shown in Figure 2:

2. Working principle of tilting and swinging test bench

The WS-RTS76 series tilt swing test bench uses hydraulic oil to drive a low damping oil cylinder to complete the set action, as shown in Figure 3. The action in the same direction is completed by two low damping oil cylinders A and B. Oil cylinder A and oil cylinder B are connected in series on the hydraulic oil circuit, and the accuracy requirements are achieved through the balance adaptation and closed-loop control correction of the oil cylinder itself. The hinge at both ends of the oil cylinder, combined with the bidirectional swing center, can achieve decoupling function for the two-way composite test. The experimental angle is fed back by an angular displacement sensor installed at the hinge.

5、 Division Introduction

1. Mechanical platform body

The mechanical body of the WS-RTS76 series tilting and swinging test bench mainly consists of a table, servo linear oil cylinder, support bearings for the roll and pitch shafts, double pivot universal rotation decoupling bracket, swing mechanism installation frame, servo valve, and angular displacement sensor.

The material for the worktable of the WS-RTS76 series inclined swing test bench is usually high-quality carbon structural steel. The workbench size of RTS76-500 is 1500mm × 1500mm, with M16 threaded mounting holes for the test piece, and a center distance of 200mm × 200mm between the threaded holes.

Note: The workbench can be customized according to user needs.

The execution components of the RTS76 series tilt swing test bench are all servo linear oil cylinders. Servo hydraulic cylinder is another key component in the design of electro-hydraulic servo systems. Generally, it is rarely selected based on parameters, and the vast majority of non-standard designs are based on process requirements, calculation results, equipment structural dimensions, etc. The designed hydraulic cylinder structure and its dynamic characteristics directly affect the performance and normal use of the system. Therefore, the design of hydraulic cylinders for servo systems is an important part of the control system.

Roll and pitch axis support bearings: a pair of precision bearings with pre tensioned loads are used respectively. One end of the bearing is fixed relative to the bearing seat, while the other end of the bearing outer ring moves relative to the bearing seat to compensate for the accumulated tolerance caused by the shaft system during processing. This scheme enables the rolling shaft system to have a high load-bearing capacity, high connection stiffness, and achieve high rotational accuracy. Make the tabletop move smoothly without shaking or crawling.

The machine base is the connecting component between the actuator and the base plate, which has high strength and provides movement space for the piston rod.

Dual pivot universal rotation decoupling bracket: In a multi degree of freedom rotation system, a decoupling bracket with heavy load and large inertia is the key to achieving multi degree of freedom rotation. This equipment adopts the method of spatial cross axis support to achieve universal support. If the design of the spatial cross axis is not reasonable, it will increase the inertia moment of the system and cause unnecessary energy loss.

Swing mechanism installation rack: The structure is made of carbon steel material, and the surface is precision machined to ensure installation and use requirements. The rack is one of the key components of the swing table, and the quality of its structural design is crucial to the static and dynamic performance of the swing table. Therefore, the following requirements are proposed for the design of the rack:

High stiffness, high strength

Lightweight and low inertia

Structural symmetry

The rack adopts a closed box shaped section structure, which is a typical structure commonly used at home and abroad. To ensure high stiffness, suitable reinforcement bars are equipped inside the section. The frame undergoes aging treatment and stress relief after rough machining. Its key dimensions are machined and formed by high-precision coordinate boring machines, and the axis intersection of two sets of orthogonal holes is ensured during the machining process. Two sets of hole systems are machined at the same reference and height, effectively ensuring the requirement of three-axis intersection.

In addition, during the design process, full consideration should be given to the grindability of the rack positioning installation surface. During the assembly process, on-site adjustments can also be made based on measured values to ensure the mutual perpendicularity of the three axes.

The surface of the rack has been treated with multiple layers of spray paint, providing long-lasting and efficient anti-oxidation and moisture resistance. The bottom plate is designed with anchor bolt holes for fixing the equipment on a dedicated foundation.

Servo valve: The electro-hydraulic servo valve is both an electro-hydraulic conversion component and a power amplification component. It connects the electrical and hydraulic parts to achieve the conversion and amplification of electro-hydraulic signals. The electro-hydraulic servo valve is the core of this swing test bench.

Electro hydraulic servo valves have the advantages of small size, compact structure, high power amplification factor, good linearity, small dead zone, high sensitivity, good dynamic performance, and fast response speed. Therefore, it has been widely used in swing platforms.

There are many types and structures of electro-hydraulic servo valves, and the commonly used ones on the swing test bench are force feedback and two-stage servo valves.