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What are the vacuum pumps of the Roots blower?
Release time:
2022-04-02
Under normal circumstances, the axes of the two rotors are installed horizontally, and the plane formed by the two rotor axes is in the horizontal direction. The air inlet of this type of pump is located above the pump, and the exhaust outlet is below the pump (the opposite is also possible). The lower exhaust outlet is usually connected horizontally, so the air inlet and exhaust directions are perpendicular to each other. One end is connected to the exhaust pipe, while the other end is either not powered or connected to a bypass valve. The characteristics of this structure are a low center of gravity and good stability during high-speed operation. There is also a vertical configuration: the axes of the two rotors are installed horizontally, but the plane formed by the two rotor axes is perpendicular to the horizontal plane. In this structure, the pump's inlet and outlet are set horizontally, which facilitates assembly and connection of pipes. However, its disadvantage is that the pump's center of gravity is too high, leading to poor stability during high-speed operation. The vertical shaft type: In some foreign Roots vacuum pumps, the axes of the two rotors are installed vertically to the horizontal plane. This structure allows for easy control of the assembly gap, convenient rotor assembly, and a small footprint, but the disassembly of transmission mechanisms such as gears is inconvenient, and the lubrication system is complex. Roots vacuum pumps with overflow valves: To prevent accidents caused by overload, Roots vacuum pumps are equipped with a more reliable safety protection device, which is an overflow valve installed on the bypass pipeline. When the pressure at the exhaust outlet exceeds the specified pressure, the valve of the overflow valve will automatically open to create an overflow. Once the exhaust outlet pressure returns to normal, the overflow valve will automatically close.
Under normal circumstances, the axes of the two rotors are installed horizontally, and the plane formed by the axes of the two rotors is in the horizontal direction. The intake of the pump with this structure is above the pump, and the exhaust is below the pump (it can also be the opposite). The lower exhaust port is usually connected horizontally, so the intake and exhaust directions are perpendicular to each other. One end is connected to the exhaust pipe, while the other end is either not powered or connected to a bypass valve. The characteristics of this structure are a low center of gravity and good stability during high-speed operation. There is also a vertical configuration: the axes of the two rotors are installed horizontally, but the plane formed by the two rotor axes is perpendicular to the horizontal plane. In this structure, the pump's inlet and outlet are set horizontally, which facilitates assembly and connection of pipes. However, its disadvantage is that the pump's center of gravity is too high, leading to poor stability during high-speed operation.
Vertical axis type: Some foreign Roots vacuum pumps have their two rotor axes installed vertically to the horizontal plane. This structure allows for easy control of the assembly gap, convenient rotor assembly, and a small footprint, but the disassembly of transmission mechanisms such as gears is inconvenient, and the lubrication system is complex. Roots vacuum pump with overflow valve: To prevent accidents caused by overload, the Roots vacuum pump is equipped with a more reliable safety protection device, which is an overflow valve installed on the bypass pipeline. When the pressure at the exhaust port exceeds the specified pressure, the valve of the overflow valve will automatically open to create an overflow. Once the exhaust port pressure returns to normal, the overflow valve will automatically close.
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