Tag: working principle

The realization of the overload protection function of the miniature circuit breaker is based on the principle that bimetals bend in a regular direction as the temperature rises. After the miniature circuit breaker is closed, it is in normal working condition. The inner bimetal is heated by a certain current passing through it. The two pieces of metal have different thermal expansion coefficients and cause bending.

Electric chain hoist is a hoisting and transporting machine that is used to lift or lower heavy loads and can move in the horizontal direction. It has the characteristics of small lifting weight, simple result and convenient operation, and is widely used in the installation, lifting and maintenance of small equipment in industrial and mining enterprises. Generally, electrical power chain hoists have only one constant running speed.

Centrifugal pump refers to a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. Centrifugal pumps are widely used and are almost indispensable equipment in process systems. The small size, simple operation and long service life of the centrifugal pump are the outstanding advantages of the centrifugal pump. If the pipeline delivery system is regarded as the vascular circulation system of the human body, then the centrifugal pump is equivalent to the heart that transports blood.

The working principle of dosing pump is relatively simple, but because it involves highly corrosive liquid and high-precision flow, it has very high requirements for every part and every process of the machine. When the coil of the electromagnet is charged, the iron core pulls the electromagnetic push rod together, and at the same time, the corresponding five springs are compressed and the liquid is quantitatively sucked in. And when the coil of the electromagnet loses power, due to the disappearance of the electromagnetic force, the compressed 5 springs will be released, so that the liquid is quantitatively discharged.

The DC-DC converter is a voltage converter that effectively outputs a fixed voltage after converting the input voltage. DC to DC converters are divided into three categories: step up DC-DC converters, step down DC- DC converters, and buck-boost DC-DC converters. Three types of controls can be used according to requirements. At present, DC to DC converters are widely used in products such as mobile phones, MP3s, digital cameras, and portable media players.

The vacuum generator is a high efficiency and small vacuum component that uses a positive pressure air source to generate negative pressure. This makes it necessary to use both positive and negative pressure in places where there is compressed air or in a pneumatic system. It is very easy and convenient to obtain negative pressure in places. Vacuum ejectors are widely used in industrial automation in the fields of machinery, electronics, packaging, printing, plastics and robotics.

The hub motor (also called wheel motor, wheel hub drive, wheel hub motor, or in-wheel motor) is characterized by the integration of power, transmission and braking devices into the wheel hub, thus greatly simplifying the mechanical part of electric vehicles. Hub motor is not a new thing, as early as 1900, already manufactured the front wheel equipped with hub motor electric vehicles, in the 1970s, hub motor technology in the field of mining transport vehicles and other applications.

Slip-ring induction motors, also known as three-phase wound-rotor AC asynchronous motors, must be connected in series with a resistor or resistors in the motor rotor in order to reduce the starting current and increase the starting torque and power factor, effectively improving the motor starting performance. This article describes the principle and structure of slip-ring motors.

Laser distance sensor is a kind of sensor which uses laser technology to measure the distance. It is generally composed of laser, optical parts and photoelectric devices. It can convert the measured physical distance into optical signals, and then use photoelectric converter to convert the optical signals into electrical signals. Through the filtering, amplification and rectification of corresponding circuits, the output signals can be obtained, so as to calculate the measured quantity.

The pull rope switch is composed of pull rod, reset handle, cam, lock slot and micro switch. The pull rope switch is installed on the frame on both sides of the belt conveyor, and the switch is connected with the steel wire rope along both sides of the conveyor. When an emergency occurs in the conveyor belt equipment, the wire rope is pulled anywhere along the line at the site, and the wire rope pulls the drive arm to rotate, which drives the torque spring through the drive shaft to displace the precision cam and drive the control line, making the conveyor stop running.

The temperature controller is a kind of intelligent temperature control instrument. It has the functions of temperature curve programmable or fixed-point constant temperature control, multiple PID regulation, output power limiting curve programming, manual / automatic switching, soft start, alarm switch output, real-time data query, communication with computer, etc. It combines digital temperature meter and ZK thyristor voltage regulator into one, which integrates temperature measurement, regulation and driving. The meter directly outputs thyristor trigger signal, which can drive all kinds of thyristor loads. It is used in all kinds of high and low voltage switchgear, dry-type transformer, box type substation and other related temperature application fields. In addition to understanding what the temperature controller is, we also need to know its three "how": how to work, how to use, and how to choose the temperature controller for better use of ATO.   

Vibration motor is installed at both ends of the rotor shaft each set of adjustable eccentric block, and then use the centrifugal force generated by high-speed rotation of shaft and eccentric block. Its purpose is to get the exciting force. It has a wide range of vibration frequencies. Only when the excitation force and power are properly matched can the mechanical noise be reduced. There are six types of vibration motors, which are classified according to starting and running mode and running speed.

Vibration motor is a power source and vibration source combined as one of the exciting source. Its exciting force is easy to use, and has the advantages of high utilization rate, low energy consumption, low noise, long life and so on. They can be applied to general vibration machinery, such as: vibration crusher, vibrating screen extension machine, vibration baler, vibration shakeout machine, vibration molding machine, vibration pile driver, vibration hoist, vibration filling machine, silo vibration arch broken anti-occlusion device and so on. They are widely used in hydropower construction, thermal power generation, construction, building materials, chemical industry, mining, coal, metallurgy, light industry and other industrial sectors.

Transformer is a device that transform AC voltage, current and impedance. It uses the principle of electromagnetic induction to transform AC power of one voltage level into AC power of another voltage level. When an AC current is passed through the primary coil, an AC magnetic flux is generated in the iron core, causing a voltage (or current) to be induced in the secondary coil. It is composed of an iron core and a coil. The coil has two or more windings. The winding connected to the power supply is called the primary winding, and the remaining windings are called the secondary winding.

Transformer mainly uses the principle of electromagnetic induction to work. The specific process is when an AC voltage U1 is applied to the primary side of the transformer, and the current flowing through the primary winding is I1, the current will generate alternating magnetic flux in the iron core, which makes the primary winding and the secondary winding electromagnetically connections.

A power regulator is a panel-mounted power adjustment unit that uses a thyristor (also called Silicon Controlled Rectifier or SCR) and its trigger control circuit to adjust the load power. Thanks for its small size, high efficiency and durable service life, it is widely used in AC and DC motor speed control system, power control system, follow-up system, temperature control and many other sectors. SCR power regulator works by means of an intelligent digital control circuit. Its precise control of voltage, current and power makes for precise temperature control. And its advanced digital control algorithm greatly improves energy efficiency, which highlights its important role in saving electric energy. Power regulators are becoming an indispensable equipment in the automation industry.

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.

Paperless recorder is a device that records the collected calculation data in the internal storage system of the instrument by time. It has the advantages of being paperless, real-time, high-precision, communicable, searchable and intelligent. Paperless recorder abandons the deficiency of using paper and pen in the traditional recording method, and at the same time improves the quality and stability of the recorder, and more importantly, reduces the running cost of the recorder, facilitates management, improves work efficiency, and avoids the possibility of error in manual recording.

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.