Abstract
The research of working pressure of one-piston pump with a combined compensator of pressure pulsations during the operating cycle is carried out. One of the basic gas law in an isothermal process, namely the law of Boyle-Marriott is employed. The law of piston motion which is driven from the crank-connecting rod mechanism (the axis of the crank shaft is made offset downwards relative to the axis of the piston to reduce the magnitude of lateral forces) is used. The piston drive crank rotation angle, the primary pressure in the compensator are taken into account. The research is needed to ensure a stable high-pressure feed of medium (solution) pumped by the pump, with a reduced level of pulsation. The quantitative dependences of the solution volume in the compensator on the piston movement, the solution feed pressure relative to the crank shaft rotation angle, the minimum required amount of total given volume of combined compensator air (it is 0.02m 3 ) are defined. Practical significance of the obtained results of the research is to develop a piston pump design. It provides a stable feed pressure, moderate pulsation level of the solution, which is pumped.
Highlights
The mortar pumps were used for transportation of buil ding mortar mixes directly to jobs in the initial phase of implementation
The mortar solutions have been of large mobility at the same time
There is a gradual transition from manual application of mortar solutions on the build ings and structures working surfaces to mechanized
Summary
The mortar pumps were used for transportation of buil ding mortar mixes directly to jobs in the initial phase of implementation. The mortar solutions have been of large mobility at the same time They were fed with significant pulsation (pressure fluctuations), which had no impact on the technology, because there was only filling in the working tanks. There is a gradual transition from manual application of mortar solutions on the build ings and structures working surfaces to mechanized. The nozzles are used in mechanized application They have mouth pieces that are located at the end of the pressure pipeline. The mortar pumps can be used for the feed and laying of cement-sand mixtures when performing a self-levelling floor screed, filling under pressure a hard mortar for joints and seams between concrete structures for grouting and for pumping of whitewashing compounds with a large scope of work. The problem of ways searching to reduce the feed pulsation magnitude of mortar pumps is still relevant
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