What is a cylinder magnetic switch, the working principle and characteristics of a cylinder magnetic switch

The cavity in the internal combustion engine cylinder where the piston is placed. It is the track on which the piston moves, in which the gas burns and expands. It can also dissipate part of the explosion waste heat transmitted by the gas through the cylinder wall, so that the engine can maintain a normal operating temperature. The types of cylinders include integral type and single cast type. Single casting type is divided into two types: dry type and wet type. When the cylinder and cylinder block are cast as a whole, it is called an integral cylinder;when the cylinder and cylinder block are cast separately, the single-cast cylinder barrel is called a cylinder liner. Cylinder liners that are in direct contact with cooling water are called wet cylinder liners;cylinder liners that are not in direct contact with cooling water are called dry cylinder liners. In order to maintain the tight contact between the cylinder and the piston and reduce the friction loss of the piston movement within it, the inner wall of the cylinder should have high machining accuracy and precise shape and size.

2. What is a magnetic switch

Magnetic switch means induction through magnets. This "magnetism" is a magnet. There are several kinds of magnets. Commonly used magnets on the market include rubber magnets, permanent ferrite magnets, Sintered NdFeB, etc. The switch is the reed switch. Reed switch is the abbreviation of dry reed switch. It is a passive electronic switching component with contacts. It has the advantages of simple structure, small size and easy control. Its outer shell is generally a sealed glass tube, and the tube contains There are two iron elastic reed electric plates filled with inert gas. Usually, the two reeds made of special materials in the glass tube are separated. When a magnetic substance is close to the glass tube, under the action of the magnetic field lines, the two reeds in the tube are magnetized and attracted to each other. The reeds will attract together, connecting the circuits connected to the nodes. After the external magnetic force disappears, the two reeds separate due to their own elasticity, and the circuit is disconnected. Therefore, as a line switching device controlled by magnetic field signals, the reed switch can be used as a sensor for counting, limiting, etc. (mainly used in the production of door magnets and window magnets in security systems), and at the same time It is widely used in various communication equipment.

3. Working principle of cylinder magnetic switch

The cylinder magnetic switch is a magnetic switch installed on the outside of the cylinder barrel of the cylinder. The cylinder can be of various types, but the cylinder tube must be made of materials with weak magnetic permeability and strong magnetic isolation, such as duralumin, stainless steel, brass, etc. A magnetic ring of permanent magnet (rubber magnet) is installed on the non-magnetic piston. When the magnetic ring moves with the piston and approaches the switch, the two reeds of the reed switch are magnetized and attract each other, and the contacts close;when the magnetic ring moves close to the switch, When the switch is removed, the reed loses magnetism and the contacts open. When the output point is closed or disconnected, an electrical signal is emitted (or the electrical signal disappears), and the corresponding solenoid valve is controlled to complete the switching action. As shown below. Magnetic switch< /a>There is also usually an indicator light for switching action and an overvoltage protection circuit inside, which are sealed in a shell with resin.