INSTALLING LIQUIDRING VACUUM PUMPS （安装液环真空泵）.PDF

INSTALLING LIQUID-RING VACUUM PUMPS The first lesson for operating liquid-ring vacuum pumps is installing them properly The liquid-ring vacuum pump is a specific form of rotary positive-displacement pump utilizing liq- uid as the principal element in gas compression. The compression is performed by a ring of liquid formed as a result of the relative eccentricity between the pump’s casing and a rotating multi- bladed impeller. The eccentricity results in near-complete filling, and then partial emptying, of each rotor chamber during every revolution. The filling and emptying actions create a piston action within each set of rotor or impeller blades. The pump’s components are positioned in such a FIGURE 1 In the once through, no- manner as to admit gas when the rotor chamber is recovery system, the seat liquid emptying the liquid, and then allowing the gas to discharge is separated from the gas and discharge once compression is completed. Sealing allowed to flow into a drain areas between the inlet and discharge ports are provided, to close the rotor areas, and to separate the inlet and discharge flows. IN THE BEGINNING SETTING UP The proper installation of a liquid-ring vacuum pump is critical to its subsequent operation and maintenance. The following Liquid-ring vacuum pumps are basically slow-speed, smooth-operat- installation guidelines are general recommendations that apply to