I. Application

The ZBK series Roots vacuum pumps are a coarse vacuum acquisition equipment, widely used in industries such as papermaking, chemicals, pharmaceuticals, building materials, food, clothing, and sugar production. They are the ideal equipment for vacuum dehydration of the long circular sieve water tanks in the papermaking industry or the long mesh papermaking machine. Within this scope, the ZBK series Roots vacuum pumps have advantages over water ring vacuum pumps, such as high suction speed, high efficiency, compact structure, small size, easy maintenance, long service life, and low power consumption. The suction medium can be dry or wet air or a mixture of water, but the medium must not contain granular substances, high dust gases, or corrosive materials.

II. Structure and Working Principle

The internal structure of this unit consists of two figure-8 structure rotors. The motor drives the active rotor through a V-belt pulley, and the driven rotor is rotated by a synchronous gear driving the driven gear. The two rotors do not touch each other and maintain an approximate gap of 0.4mm. There is an approximate gap of 0.25mm between the rotors, the pump housing, and the end covers. During operation, due to the continuous separation of the rotors at the lower part of the pump chamber, volume expansion occurs, while at the upper part, the continuous approach of the rotors causes volume contraction, thus completing the suction and exhaust functions. This creates a vacuum on the suction side and connects the exhaust side to the atmosphere, nearly at atmospheric pressure.

The pump housing features an exhaust muffler that provides stable pressure, sealing function, and improves the pump's efficiency.