Электродвигатель

Электродвигатель является источником механической энергии, приводящей в движение винтовой вакуумный насос.. Электродвигатель может работать на переменном токе. (переменный ток) или постоянный ток (ОКРУГ КОЛУМБИЯ).

Корпус насоса

Корпус насоса содержит винты, корпус подшипника, и любой другой внутренний компонент насоса. Корпус насоса обычно герметизирован, чтобы предотвратить утечку жидкости под давлением.. Корпус насоса имеет два типа.: с осевым разъемом или радиально. В корпусе с осевым разъемом, the two halves open parallel to the screw axis, while in a radially split case, the two halves open perpendicularly to the screw axis. A screw vacuum pump uses an axially split pump casing since it’s easy to maintain and provides excellent hydraulic performance. Screw vacuum pump manufacturers create pump casings from a wide range of materials, including grey cast iron, углеродистая сталь, легированная сталь, and stainless steel.

Helical screw-shaped rotors

A screw vacuum pump comprises two parallel non-contacting screw-shaped rotors (one driver and one driven screw) that rotate synchronously through a precision gear. The driver screw (male rotor) rotates the driven screw through a timing gear, helping to move the fluid at a constant volumetric level at any location. The driven screw (female rotor) turns about its axis due to the torque transmitted by the timing gear. The driven and driver screws rotate in opposite directions while maintaining a fixed clearance area, which helps to move the fluid along the rotating angle and provides a non-pulsating discharge. Screw vacuum pumps use variable pitch rotors, which help to compress the fluid at each pitch change while transporting it to the outlet. The screw vacuum pump manufacturers use high-tensile steel and alloy steel to manufacture the screws. The rotors are usually coated with spray-on polytetrafluoroethylene to prevent corrosion.

Ведущий вал

The driving shaft connects the pump assembly with the electric motor via flexible couplings. Screw vacuum pump manufacturers make driving shafts from mild steel, нержавеющая сталь, or carbon steel to withstand heavy loads, high speeds, and vibration, which can cause extreme stress during operation.

Сроки передач

The primary function of a timing gear is to transmit rotary motion from the drive screw to the driven screw. It also helps to maintain a tight clearance between the drive and driven screw so that the screws do not come into direct contact during operation.

Подшипники

The bearings support the screws and ensure they align perfectly in the pump assembly. A screw vacuum pump comprises two kinds of bearing: upper and lower bearings. The upper bearings mainly carry heavy loads during pumping, including axial and radial forces. С другой стороны, the lower bearings bear minor loads and help maintain a perfect alignment of the pump’s components.

Suction and discharge ports

The suction port connects to the suction pipe, permitting fluid entry into the pump, while the discharge port connects to the discharge pipe directing the pumping fluid out of the pump and to the required destination. Suction and discharge pipes are attached to the pump casing via flanges or pipe unions.

Клапан сброса давления

A crew vacuum pump accumulates a lot of pressure during operation, which may destroy the pump’s components or put the pump operator at risk of injuries. A pressure relief valve is thus used to return the extra pressure to the intake, thereby protecting the pump and the operator.

Dust separator

It removes contaminants from the pumped gas stream before reaching the pump. Screw vacuum pump manufacturers design a dust separator to filter dust and other pollutants with a size larger than the rotor/stator clearance.

Exhaust silencer

It is a stainless-steel muffler located at the pump outlet to reduce noise generated to an acceptable level.

Thermostatic control valve

It is to control the temperature by automatically varying the cooling water flow rate. It works together with a thermostatic switch which stops the pump to prevent damage if the pump temperature reaches a preset limit.