Components Introduction of Vibration Testing System

Brief introduction of working principle of class D power amplifier: Class D power amplifier adopts bilateral modulation technology. A stable high-frequency triangular wave is compared with another error signal after being amplified and amplified by the system feedback signal through an error amplifier to generate a pulse width modulated logic signal, which is then The driver drives the IGBT module, then the modulation frequency is filtered by the filter inductor to restore the fundamental wave UL 1642 UL 2271 UN 38.3

Components Introduction of Vibration Testing System

Output Power3kVA
Frequency Range1~4000 Hz
Input Resistance> 15kΩ or more
Rated Output Voltage100V
Rated Output Current32A
Power SupplyAC380V ± 10% 3 Phase 4 wire 50Hz
Cooling MethodForced Air Cooling

● Class D Power Amplifier SA3K Model

Class D power amplifier has the characteristics of high conversion efficiency, good reliability, soft start, and shock resistance. Diagram of working principle of Class D amplifier, Please refer to this below picture.

Class D amplifier working principle diagram

(1) Power Supply Overvoltage(6) Overcurrent
(2) Power Supply Undervoltage(7) Overvoltage
(3) Over Displacement(8) Module Overcurrent
(4) The Machine is Overheated(9) Oil Pump Pressure
(5) The Module is Overheated(10) Zero Signal (reset)
Protection Instructions

In addition, in order to allow the table body to fully dissipate heat after shutdown, an automatic delay shutdown function is also specially set. In particular, there is an emergency stop switch on the control panel. In any case, pressing this button will ensure that the system is powered off to protect the system from damage.

power amplifier control panel

NOTE: Excitation Power Supply: Output Voltage: DC270V|Output Current: DC9A

● Electromagnetic Excitation Generator VG300 / 38

Structure and characteristics: VG300 / 38 is a wide-band electric vibration machine with a working frequency range of 2 ~ 4000Hz. Its structure is (1) The active system is composed of drive coil, skeleton and table top; (2) Support and guidance system of the activity system; (3) The magnetic circuit system and other components.

The magnetic circuit is composed of a magnetic cylinder, a central magnetic pole, upper and lower pole plates, and an excitation coil. The magnetic cylinder is suspended on the trunnion structure and can rotate 90 ° vertically and horizontally. The trunnion structure adopts air spring vibration isolation and linear guide suspension. The vibration isolation device in the structure eliminates the influence of internal and external vibration interference.

(1) Table ParametersPlease refer to “System Specifications”
(2) Table Sizeф150mm
(3) Install the Test Piece Hole13-M8 16mm Deep
(4) Allowable Eccentric
(5) Axial Suspension Air Spring
(6) Vibration Isolation Device Air Spring
(7) Dimensions780mm × 800mm × 752mm
(8) Net Weight750 KGS

● H series Liquid Static Pressure Horizontal Slide

The H series liquid static pressure horizontal slide table can be used in conjunction with the EV series electric vibrator produced by our company. The horizontal slide has a large acceleration and a high working frequency, and the supporting two share a base (integral type), so the rigidity is good, and the installation and debugging are convenient. Due to the use of static pressure guide rails, the guide performance is good, and the anti-overturning and anti-eccentric load capabilities are strong. The low-pressure fuel supply pump is adopted, with simple structure, convenient operation and reliable work.

Working Principle and Structure for H Series Liquid Static Pressure Horizontal Slide Table:
The water leveling table adopts a static pressure active system, and its oil source enters the pressure regulating valve through the oil filter for pressure regulation (adjusted before leaving the factory), and then passes through the horizontal guide rail and granite slab equipped with a throttle, and An oil film is formed on the work surface, which has a certain carrying capacity, and then the vibration of the vibration generator is transmitted to make the horizontal slide work, and horizontal vibration is generated.

The H liquid static pressure horizontal slide table is composed of a connector, a horizontal slide table (working table surface), a granite slab, a horizontal slide table base, a slant guide rail device, and a static pressure oil source, as shown in this photo

H404 Model Horizontal Slide Table:Operating Frequency Range: 5-2000 Hz
Net Weight of Platform: 13 KGSAluminum Connector Weight: 2.0 KGS
Allowable Overturning Moment: 620 N.mSlide Table Thickness: 30 mm
Slide Table Size: 400 × 400 mm Table Base Size: 1424 × 700 × 846 mm
Static Pressure Oil: 0.02-0.04 Mpa,Flow Rate 1.5 L / min, Screw Hole: M8

schematic diagram of water leveling table

Connector: Its function is to connect the electric table and the horizontal slide table into one|Water Leveling Table (working table): Rolled from aluminum alloy material.

Granite Slab: The material is granite, which has high hardness and compressive strength, good wear resistance and corrosion resistance and good insulation performance, and has the characteristics of never deforming.

Water-Smooth Table Base: The electric table and the water platform are installed on the same base, the whole machine has strong rigidity and easy operation.

Inclined Guide Device: The guide device composed of inverted guide rail, guide rail slider and guide rail seat has good guide performance and anti-eccentric load capacity.

Static Pressure Oil Source: Composed of motor, gear oil pump, throttle valve, pressure gauge, etc. The oil supply system with static pressure is equipped with a mesh oil filter on the oil suction pipe of the oil pump to protect the oil pump from inhaling impurities. In addition, a paper oil filter is installed before the working oil enters the throttle Used for fine filtration of oil source.

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