Reciprocating plunger pump power-end component and multi-cylinder reciprocating plunger pump adopting same

Abstract

The invention relates to a reciprocating plunger pump power-end component and a multi-cylinder reciprocating plunger pump adopting the same. The reciprocating plunger pump power-end component is characterized in that a power-end component comprises a crankshaft which can rotate under the action of an external power mechanism; a rolling bearing sleeves an eccentric shaft of the crankshaft; a ring sleeve sleeves the rolling bearing; an upper pull disc is fixed on the ring sleeve; a lower pull disc is fixed below the ring sleeve; the inner sides of the upper pull disc and the lower pull disc are assembled outside the rolling bearing; a sliding block is arranged outside the ring sleeve; the inner top end of a plunger rod of the reciprocating plunger pump is propped against the sliding block; an upper groove and a lower groove are formed in the upper pull disc and the lower pull disc respectively; an upper positioning groove and a lower positioning groove are formed in corresponding parts of the plunger rod respectively; and a lower positioning piece is arranged between the lower groove and the lower positioning groove. According to the invention, the upper pull disc, the lower pull disc and the ring sleeve rotate very slowly by virtue of a friction force of the rolling bearing and a public force generated during reciprocating of the plunger rod, so that the noise and vibration of motion are reduced and the operation efficiency is improved. The multi-cylinder reciprocating plunger pump adopting the reciprocating plunger pump power-end component is compact in structure and has lower requirements on a mounting site.

Description

technical field [0001] The invention relates to a reciprocating pump structure, in particular to a power end assembly of a reciprocating plunger pump and a multi-cylinder reciprocating plunger pump using the assembly. Background technique [0002] Generally, the liquid end of the horizontal reciprocating pump is in front of the power end, and the power end of the vertical reciprocating pump is below the liquid end, and the work done by the crankshaft only serves one liquid end. limits. Reciprocating plunger pumps are more efficient than centrifugal pumps, and have gradually replaced centrifugal pumps in the field of water supply. However, because the size and structure of reciprocating plunger pumps do not meet site requirements, they cannot be used in high-rise building water supply systems. Building water supply is a civil and industrial multi-field water supply and energy-saving project for high-rise buildings, and it is also a project with a huge amount of promotion. T...

AI Technical Summary

Problems solved by technology

The reciprocating plunger structure adopts spring reset after repeated reciprocating movements, the spring is prone to fatigue, short life and limited elastic force, so it needs to be replaced and repaired frequently

The reciprocating plunger structure of the rotary disc pulls back by installing rolling bearings on the plunger rod. The periphery of the rotary disc surrounds all the rolling bearings, and the rotary disc rotates to pull back the plunger. When moving, multiple rolling bearings rotate at the same time. The energy effectively converted into reciprocating motion is low, and the purpose of energy saving cannot be achieved very well

[0004] For example, a Chinese invention patent "A Multi-Cylinder Reciprocating Pump" with the patent number ZL201010208353.2 (notification number CN101876302B) discloses such a reciprocating plunger structure that uses the rotating disk rolling bearing to pull back the plunger rod at high speed. In the document, the main eccentric wheel is used to push out the guide rod, and the auxiliary eccentric wheel is used to pull back the guide rod. If the rotation speed of the main eccentric wheel and the auxiliary eccentric wheel are different, the guide rod will collide with the auxiliary eccentric wheel back and forth, which will cause a large noise, the reciprocating motion of the guide rod needs to be completed by the cooperation of the main eccentric wheel and the auxiliary eccentric wheel, the operating efficiency is low, and there is still room for improvement

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