RU2303166C2 - Liquid-ring machine with automatic control of through section of delivery port - Google Patents

Abstract

FIELD: mechanical engineering; vacuum equipment.

SUBSTANCE: invention relates to liquid-ring pumps and compressors. Proposed liquid-ring machine contains housing, end face covers with suction and delivery ports for gas medium and shaft installed with eccentricity on which impeller is arranged. Delivery port is furnished with shutter, shutter position control mechanism and pipeline. Said mechanism contains piston with return spring and rod connecting shutter with piston. Pipeline connects suction zone with control mechanism to build vacuum over piston.

EFFECT: increased capacity and efficiency of liquid-ring machine.

2 dwg

Description

The invention relates to compressor engineering and vacuum technology, specifically to liquid-ring pumps and compressors. The proposed design allows to increase the productivity and efficiency of the liquid-ring machine and to regulate the achieved ultimate vacuum.

An analogue is a liquid-ring machine containing a housing, end caps with suction and discharge windows for a gas medium and an eccentric shaft mounted on which the impeller is located, holes are made in front of the discharge windows, which are closed by rubber valves allowing the compressed gas to escape into the discharge cavity at pressures above atmospheric (E.S. Frolov, I.V. Avtonomova, V.I. Vasiliev, etc., "Mechanical vacuum pumps", - M .: Mechanical Engineering, p.198, Fig. 137).

The disadvantage of this design is the constancy of the size and position of the valve openings, which only partially reduces the resistance of gas flows at the initial moment of evacuation and does not regulate the pump at the final moment of evacuation, which reduces the productivity and efficiency of the liquid-ring machine.

The prototype is a liquid-ring compressor containing a housing with end caps and discharge nozzles, an eccentrically mounted rotor and removable elements with discharge windows, characterized in that, in order to simplify the changeover to various operating modes, the discharge nozzles are removable and serve as removable elements (US Pat. SU No. 787728, CL 6 F04C 7/00, 19/00).

The disadvantages of this design are the complexity of operation, due to the fact that when changing the compressor to various operating modes, it is necessary to disassemble it to replace removable elements, as well as the inability to change the flow cross section of the discharge window in the process of evacuation, which reduces the performance and efficiency of the liquid-ring machine.

The technical task is to create a structure during which a certain flow section of the discharge window is established in various modes, which increases the resistance to the gas flow during the evacuation process and maintains the discharge pressure higher than atmospheric up to a certain final moment of evacuation, controlled by changing the position of the damper, which allows to increase productivity and the efficiency of the liquid ring machine.

The solution to the technical problem lies in the fact that the liquid-ring machine, comprising a housing, end caps with a suction and discharge windows for a gas medium and an eccentric shaft mounted on which the impeller is located, is equipped with a shutter, a mechanism for regulating the position of the shutter and a pipeline, the control mechanism includes a piston with a return spring and a rod connecting the valve to the piston, and the pipeline connects the suction zone to the control mechanism with the possibility of creating ezheniya above the piston.

SUMMARY OF THE INVENTION

Figure 1 shows a liquid ring machine, a longitudinal section; figure 2 section aa in figure 1.

The liquid ring machine comprises a housing 1, end caps with suction and discharge windows, consisting of bases 2 and disks 3 having a groove 4 in the area of the discharge window, in which there is a shutter 5 connected by a rod 6 to the piston 7 of the control mechanism 8 having a return a spring 9 and a pipe 10 connecting the suction zone to the control mechanism; the drive shaft 11 mounted with an eccentricity with the impeller 12 mounted on it.

The liquid-ring machine operates as follows: at the initial moment of evacuation, the piston 7, under the action of the spring 9, moves the valve 5 away from the valve 5, fully opening the discharge window. As a vacuum is created in the suction zone using a pipe 10 above the piston 7, a vacuum is created that moves the piston 7 and deforms the spring 9 of the control mechanism 8, which leads to the movement of the shutter 5 by means of the rod 6, which reduces the flow area of the discharge window, which increases the resistance to gas flow, eliminating the backward slip of the gas phase, leading to the ultimate vacuum value with a general increase in productivity and efficiency of the liquid-ring machine.

Claims (1)

A liquid-ring machine with automatic control of the bore of the discharge window, comprising a housing, end caps with a suction and discharge windows for the gas medium and an eccentric shaft mounted on which the impeller is located, characterized in that the discharge window is equipped with a shutter, a mechanism for controlling the position of the shutter and a pipeline, while the control mechanism comprises a piston with a return spring and a rod connecting the valve to the piston, and the pipeline connects the zone sasyvaniya with the adjustment mechanism with the ability to create a vacuum above the piston.

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