Exchange of technical knowledge about vortex vacuum pumps - self recycling burner

Exchange of technical knowledge about vortex vacuum pumps
Vacuum pumps refer to equipment or devices that use mechanical, physical, chemical, or physical and chemical methods to remove air from a vacuum chamber and obtain a vacuum.Generally speaking, vacuum pumps are devices that improve, produce, and maintain a closed space through various methods.

1. Basic characteristics of vortex vacuum pumps.
   Vortex vacuum pumps were originally derived from the vortex compressor. The mechanism of the vortex compressor was invented by the French in 1905.However, due to the lack of practical applications in the time of its invention, vortex vacuum pumps were not applied to the vacuum technology field until the 1980s. The structure is simple, with fewer parts and small gaps. The leakage rate is small, the compression ratio is high, and the required cooling water and lubricating oil are small.The maintenance is simple, with high reliability. Due to the characteristics of the vortex compressor itself, the pump speed does not exceed 1000 L/min. Those with a pump speed greater than 4 L/s are generally equipped with dual-sided vortex structures, while those with a pump speed less than 4 L/s are equipped with single-sided vortex structures.The ultimate vacuum is around 1 Pa.
2. Working principle of vortex vacuum pumps.
   The working chamber of vortex vacuum pumps is composed of a pair of enantiomorphous vortex disks that are mounted and synchronized. The vortex disks are a vortex disk-shaped structure, with a radial or angular spiral groove on the surface.The static vortex disk is assembled with the movable vortex disk, and the anti-rotation mechanism ensures 180° phase difference. This pair of vortex disks forms the suction mechanism of the free vortex vacuum pump. The static vortex disk and the movable vortex disk touch each other at several straight lines (cross sections have several points), forming several pairs of crescent-shaped closed chambers.Under the driving of the crankshaft, the movable vortex disk rotates around the static vortex disk, and the contact points move along the vortex surface to draw in, compress, and expel gases. Under the driving of the motor, the crankshaft rotates once per turn, forming a new set of crescent-shaped closed chambers, achieving the suction, compression, and discharge cycle of the free vortex vacuum pump, and forming a containment and forced delivery of pumped gas.
   Through animation, we can understand the operating mode of the vortex vacuum pump's rotor more intuitively.
3. Structural characteristics of vortex vacuum pumps.
   The vortex vacuum pump is simple in structure, and is mainly composed of five parts:
   ① The movable and static vortex disks and the base;
   ② The crankshaft;
   ③ The sealing parts;
   ④ Anti-self-rotation mechanisms;
   ⑤ The motor.
   The main moving parts of vortex vacuum pumps are the movable vortex disk. The simple power transmission allows for small operating radii of the same size, the structure is simple, compact, and stable, and there is almost no wear. The power consumption is small, which is not available for other types of dry vacuum pumps.The speed of vortex vacuum pumps is small, and it is not suitable for medium-toxic, flammable, explosive gases, corrosive gases, pharmaceuticals, solvents, powders, etc. Currently, vortex vacuum pumps are mainly used for analytical instruments, semiconductor chip production lines, LCD production lines, and scientific research equipment.Due to its ability to start at atmospheric pressure, it is often used as a molecular pump and low-temperature pump.