PLUNGER PUMP Russian patent published in 2003 - IPC

FIELD: oil producing, chemical, mining industry and metallurgy. SUBSTANCE: invention can be used in different industries for transfer and delivery of liquids. Proposed pump contains housing with case liquid lubricant made in housing. It accommodates eccentric drive shaft and connecting rod coupling eccentric of drive shaft with two-step plunger. One of plunger steps forms chamber for liquid to be delivered in housing. Other one forms lubricating chamber insulated from chamber for liquid to be delivered. Lubricating chamber is connected with line to deliver liquid lubricant into joint of connecting rod with eccentric of drive shaft. Axially symmetrical space is made on surface of connecting rod mated with eccentric. Said space is located opposite to chamber for liquid to be delivered and is connected by channel with lubricating chamber. Liquid lubricant delivery line is formed by axially symmetric space and channel. Groove connected with case by channel is made on surface of connecting rod mated with eccentric around axially symmetric space. EFFECT: improved reliability, provision of effective lubrication and cooling of connecting rod with drive shaft eccentric. 2 cl, 1 dwg