Plunger pump

Abstract

The invention relates to a plunger pump which comprises a box body, a plunger pump connection mechanism, a check valve, a crankshaft, a plunger and a plunger guide device. The plunger pump connection mechanism comprises a positioning ring; one end of the positioning ring is matched with the connecting end of a motor; the box body and the positioning ring are integrated; the box body comprises a first bearing hole and a second bearing hole; the inner end of the first bearing hole is provided with a first bearing shoulder hole; the inner end of the second bearing hole is provided with a check ring; the inner diameters of the first bearing hole, the first bearing shoulder hole and the second bearing hole are sequentially decreased; the check valve comprises a pump head, a valve element and a spring; the valve element is provided with a cone working end of which the outer diameter is gradually decreased from inside to outside; the shape of the inner end of the pump head is matched with that of the working end; the plunger guide device comprises a water seal pressure ring; a first positioning hole for enabling the plunger to be inserted in is arranged in the box body; the water seal pressure ring is arranged at the position on the outer side edge of the first positioning hole, which is contacted with the plunger; and the plunger is driven by the crankshaft to reciprocate in the first positioning hole.

Description

technical field [0001] The invention relates to a pump, in particular to a plunger pump. Background technique [0002] The plunger pump is an important device of the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize oil suction and pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. It is widely used in high pressure, large flow and flow adjustment occasions, such as cleaning machines, engineering machinery and ships. [0003] There is following shortcoming in existing plunger pump: [0004] 1. The box is connected to the external motor through the connecting flange, and there are assembly tolerances between the motor and the flange, and between the flange and the box; [0005] 2. The cabinet cannot be processed at one time; [0006] 3. The one-way valve and pump head are severely worn and...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a plunger pump to solve the problem that the existing plunger pump has assembly tolerances between the flange and the motor, the flange and the casing, the casing cannot be processed at one time, and the one-way valve and the plunger are worn. serious problem

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