Tag: working principle

The air blower is mainly composed of the following six parts: motor, air filter, air blower body, air chamber, base (and oil tank), oil dripping nozzle. The air blower operates by the eccentric rotor in the cylinder, and makes the volume change between the blades in the rotor slot to absorb, compress and eject the air. During the operation, the pressure difference of the air blower is used to automatically send the lubrication to the oil dripping nozzle and drop it into the cylinder to reduce the friction and noise, while keeping the gas in the cylinder from returning. Air blowers are mainly divided into roots air blower, centrifugal air blower and rotary air blower. The working principles of different types of air blowers are different.

Programmable Logic Controller, short for PLC, is a digital electronic device with a microprocessor. The device is a digital logic controller for automatic control, which can load control instructions into the memory at any time for storage and execution. The programmable controller is composed of internal CPU, instruction and data memory, input and output units, power supply modules, digital and analog units.

When the PLC is put into operation, its working process is generally divided into three stages, namely input sampling, user program execution and output refresh three stages. Completing the above three stages can be called a scan cycle. During the entire operation, the CPU of PLC repeatedly executes the above three stages at a certain scanning speed.

The pH meter is an important tool for measuring and reacting the pH of the solution, and the pH electrode can realize the function of detecting pH value and output signal by supporting the pH meter. There are various models and products of pH meters. The display mode is also divided into two options: pointer display and digital display. However, no matter how the type of pH meter changes, its working principle is the same. The main body of the pH meter is a precision potentiometer. A pH meter consists of a reference electrode, a glass electrode and itself.

The electric welding machine makes full use of the high-temperature arc generated when the positive and negative poles are short-circuited instantaneously to melt the solder on the welding rod and the material to be welded, so that the contacted objects are combined. Electric welding machines are generally divided into two types according to the type of output power, one is AC power and the other is DC. The welding machine uses the principle of inductance. The inductance will produce huge voltage changes when it is switched on and off. The welding machine makes full use of the high-pressure arc generated when the positive and negative poles are short-circuited instantaneously to melt the solder on the welding rod and the material to be welded, so as to realize atom integration.

The paperless recorder is a device that records the collected calculation data in the internal storage system of the instrument based on time. The stored data recorded in the instrument is displayed on the LCD screen after calculation and simulation. There are normally digital display, bar graph display, curve display, alarm list and so on.

Industrial fan heater refers to electric heating equipment used in industrial fields such as factories and workshops. It is mainly composed of air heaters and fans. It uses advanced and efficient non-red  electric heating tubes. The machine is equipped with imported high-efficiency light trigger switches,  which are easy and reliable to operate.

Vacuum pump is a kind of equipment that evacuates the pumped container to obtain a vacuum by means of mechanical, physics, chemistry or physical Chemistry methods. The gas is absorbed in from the air inlet and enters the cavity of the frontline pump through the ventilation/isolation valve. In the pump, the gas is conveyed. When the inlet is closed by the blade, the gas is conveyed and compressed. During the transferring process, the oil is transferred from the oil injection port and inhaled into the cylinder.

Indoor air pollutants mainly come from decoration, decorative materials, boards, paints, wall paints, glues, new furniture, adhesives and other pollutants widely used in decoration which will harm human health. The air quality monitor is used to detect formaldehyde (HCHO), PM2.5, TVOC and temperature and humidity in real time. It is small and exquisite, easy to carry. Through the inner sensors, the monitor can accurately measure the concentration of pollutants, and calculate the air quality index AQI, and give an alarm when the concentration exceeds the standard.

A wind turbine is a device that uses wind energy to drive blades to rotate, thereby generating electricity. Wind generator is generally composed of wind turbines, generators, tails, towers, speed-limiting safety mechanisms and energy storage devices. The principle of a wind turbine is relatively simple: the wind wheel rotates under the action of the wind, and converts the kinetic energy of the wind into the mechanical energy of the wind turbine shaft. The generator is driven by a wind turbine shaft to generate electricity.

The ultrasonic cleaner makes use of the cavitation of ultrasonic waves to impact and eliminate the pollutants on the surface of the object, so as to wash quickly. It has the characteristics of high cleanliness and fast cleaning speed. Especially for blind holes and various geometrical objects, it has unique cleaning effects that cannot be achieved by other cleaning methods.

Rotary switch is a switch that controls the opening and closing of the main contact by rotating the handle. There are also two types of rotary switch structure, unipolar, single-position structure and multi-pole, multi-position structure. Single-pole, single-position rotary switches are often used together with rotary potentiometers in operation. Multi-pole, multi-position rotary switches are mostly used to switch operating conditions.

Dew point can be simply understood as the temperature at which the water vapor content in a gas reaches a saturated state. It is one of the ways to express the absolute humidity of a gas. It can be seen that the dew point temperature is a unit system for measuring the moisture content of a gas. The dew point meter is an instrument that measures the absolute moisture content of a gas based on this unit system.

A pneumatic cylinder is a cylindrical metal machine that guides a piston in a straight-line reciprocating movement in a cylinder. The air converts heat energy into mechanical energy through expansion in the engine cylinder, and the gas receives piston compression in the compressor cylinder to increase the pressure.

A magnetic flow meter, mag meter, or electromagnetic flow meter is a kind of instrument which measures the volume flow rate of the conductive fluid based on the principle of Faraday's Law of Electromagnetic Induction. With a large measurable flow range, the ratio of the maximum flow rate to the minimum flow rate maintains above 20:1. The mag flow meter is suitable for wide range of industrial pipe diameter, and the maximum can reach up to 3m. The output signal and the measured flow are linear, and the magnetic flow meter has high measurement precision. It can effectively measure the flow rate of fluids with a conductivity more than 5μs/cm, such as acid solution, alkaline solution, saline solution, water, sewage, corrosive liquid, mud, ore pulp, and paper pulp. Nevertheless, the electromagnetic flow meter cannot be used to measure the flow of gases, steam and purified water.

Combustible gas has certain characteristics of diffusion. In order to prevent the accidents caused by combustible gas leakage, the key lies in effectively controlling its continuous diffusion. Moreover, flammable gases will spread quickly driven by external forces. As a result, burning and explosion will take place. How to prevent the occurrence of this kind of accidents? What we need to do is often detecting the concentration of combustible gas whether it exceed the standard. Once the concentration exceeds the standard, give an alarm quickly and we take actions immediately. Here combustible gas detector plays an important role.
A combustible gas detector is a detector that monitor the concentration of single or multiple combustible gases and give an alarm. Combustible gas detectors are mainly divided into two types, catalytic type and infrared optical type base on the working principle.

Through the relative motion of the rotating magnetic field generated by the stator (its speed is synchronous speed n1) and the rotor winding, the rotor winding cuts the magnetic induction line to generate induction electromotive force, thus induced current is generated in rotor winding. The induction current in the rotor winding acts on the magnetic field to produce electromagnetic torque, thus making the rotor rotate. As the rotor speed approaches the synchronous speed, the induced current decreases and the electromagnetic torque decreases accordingly. When the asynchronous motor works in the motor state, the rotor speed is smaller than the synchronous speed. In order to describe the difference between rotor speed n and synchronous speed n1, slip ratio is introduced.

ATO Single phase to 3 phase converter has the function of filtering the grid disturbance and interference at the same time, which is a good performance of stabilized voltage and frequency power, to provide a more stable and pure power supply environment for the back end devices. Intelligent fan speed control system, low no-load loss. LCD display, high efficiency, easy installation. The output frequency 50Hz/60Hz can be set.

Understanding the infrared thermometers’ working principle, technical specifications, working conditions, operation and maintenance is the basis for users to correctly select an infrared thermometer or use it. An infrared thermometer consists of optical system, photoelectric detector, signal amplifier, signal processing and display output. The optical system of infrared thermometer accumulates the target infrared energy in its field of view. And the size of field of view is determined by the optical components and location of the thermometer. The infrared energy is focused on the photoelectric detector and converted to corresponding electrical signal. The signal is corrected by the amplifier and signal processing circuit according to the algorithm inside the instrument and the target emissivity and then is converted to the temperature value of measured target.

The secondary side is not allowed for open circuit. Once it's open circuited, current I1 at the primary side would fully turn to magnetizing current, φm and E2 would increase sharply. As a result, the iron core would occur supersaturation magnetization, heat seriously and even burn out coils. Meanwhile, supersaturation magnetization of the magnetic circuit would increase errors. Under normal operation, secondary side of the current transformer is nearly short circuited, if it's broken suddenly, the excitation electromotive force increases sharply, the magnetic flow in the iron core shows seriously saturated flat waves. As a result, the secondary side winding would induce high spike waves when the magnetic flow passes through zero, it can be thousands or even tens of thousands of volts, thus endangering the personnel safety and insulation performance of instruments.