Plunger pump

Abstract

The invention provides a plunger pump. The plunger pump comprises a casing part and a core shaft part, wherein the core shaft part is located inside the casing part, and the casing comprises a casing,a front end cover and a back end cover; the core shaft part comprises a motor main driving shaft, a core shaft, a plunger mechanism, a cylinder body and a valve plate, the back end cover is in contact with the valve plate, and has an inner cavity, a driving mechanism connected with the valve plate is also arranged in the inner cavity, and the valve plate is driven by the driving mechanism to movealong the contact surface of the back end cover. According to the plunger pump, the valve plate is driven by the driving mechanism to move along the back end cover to change the slant angle of the plunger pump, and adjustment of the displacement is achieved accordingly; in other words, the larger the slant angle is, the larger the displacement will be; meanwhile, the contact surface is a camber surface, the adjustment range of the slant angle is widened, and moving and adjusting of the valve plate are also smoother; limiting pieces are arranged, the moving stroke of the valve plate can be adjusted and controlled, and therefore the maximum displacement and the minimum displacement of the plunger pump are controlled.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a plunger pump. Background technique [0002] Piston pumps are mainly used for hydraulic drive of walking machinery. Traditional plunger pumps mainly include housings, front end covers and rear end covers fixed at the front and rear ends of the housings, main drive shafts and cores of motors installed inside the housings. Shaft, plunger mechanism, cylinder block and distribution plate; one end of the main drive shaft of the motor protrudes from the front end cover, and the other end is provided with a ball-and-socket plate. It is connected with the distribution plate, and one end of the plunger mechanism is arranged in the cylinder body. The hydraulic pump / motor adopting the above structure has the advantages of simple processing of the plunger mechanism, reliable transmission, improved production efficiency and reduced cost. However, because the flow plate and the rear end ...

AI Technical Summary

Problems solved by technology

However, because the flow plate and the rear end cover are fixedly connected, the existing plunger pumps cannot adjust their displacement accordingly.

Images