LGSR-V Roots Vacuum Pump

The Longgu LGSR-V Roots vacuum pump has a flow rate of 25.72-58.65m3/min, a boost pressure of -9.8~-49kPa, and a motor power of 11-75kw. It has the characteristics of fast start-up, low energy consumption, low operating costs, high pumping speed, high efficiency, and wide applications, and can be used in industries such as petroleum, chemical, and pesticide. Longgu Heavy Industry Roots Vacuum Pump Manufacturer can produce equipment such as LGSR-V Roots Vacuum Pump, LGSR-VHB High Pressure Roots Vacuum Pump, Roots Double Stage Vacuum Pump, Roots Vacuum Pump Unit, etc. It can have a large pumping rate in the pressure range of 100-1 Pa and can quickly eliminate suddenly released gases. This pressure range happens to be between the oil sealed mechanical vacuum pump and the diffusion pump, or it can be connected in series between the diffusion pump and the oil sealed mechanical vacuum pump to increase the pumping volume in the intermediate pressure range.

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Application of Roots vacuum pump

Roots pumps are widely used in various industries such as vacuum forming, vacuum smelting, vacuum pumping, vacuum coating, chemical and pharmaceutical industries for vacuum distillation and vacuum drying. Basically, it can be used when our working conditions require vacuum suction.

Working principle

The SR-V series Roots vacuum pump, as a type of vacuum pump without internal compression, works on a principle similar to that of a Roots blower. It mainly relies on the synchronous and reverse rotation of a pair of blade shaped rotors inside the pump chamber to move gas and achieve vacuum pumping. During operation, due to the continuous rotation of the rotor, the pumped gas is sucked into the space between the rotor and the pump casing through the inlet, and then discharged through the outlet. Due to the fully enclosed state of the v0 space after inhalation, there is no compression or expansion of gas in the pump chamber. When the top of the rotor rotates past the edge of the exhaust port and the v0 space is connected to the exhaust side, due to the high gas pressure on the exhaust side, some gas rushes back into the v0 space, causing a sudden increase in gas pressure. The rotor continues to rotate, and the gas is expelled from the pump. The Roots pump has two 8-shaped rotors installed perpendicular to each other on a pair of parallel shafts inside the pump chamber, and is synchronously rotated in opposite directions by a pair of gear belts with a transmission ratio of 1. There is a certain gap between the rotors and the inner wall of the pump casing, which can achieve high-speed operation.

Performance characteristics

1. Fast start-up, low power consumption, low operation and maintenance costs, high pumping speed, high efficiency, insensitive to dust and small amounts of water vapor in the gas being pumped, with a high pumping rate in the pressure range of 100-1 Pa, which can quickly eliminate suddenly released gas. It is also often connected in series between diffusion pumps and oil sealed mechanical vacuum pumps to increase the pumping volume in the intermediate pressure range.

2. The rotor of a Roots vacuum pump has good collective symmetry, resulting in low vibration and smooth operation. There are gaps between the rotors and between the rotor and the housing, and no lubrication is required. Friction loss is small, which can greatly reduce driving power and achieve higher speeds;

3. Has a larger pumping speed within a wider pressure range;

4. The rotor has good geometric symmetry, resulting in low vibration and smooth operation. There are gaps between the rotors and between the rotor and the housing, which do not require lubrication and have low friction loss. This can greatly reduce the driving power and achieve higher speeds;

5. The pump chamber does not require oil sealing and lubrication, which can reduce the pollution of oil vapor to the vacuum system;

6. There is no compression in the pump chamber and no exhaust valve. Simple and compact structure, insensitive to dust and water vapor in the extracted gas.

Technical Parameter