Large-duty loader hydraulic valve body casting

Abstract

The invention discloses a large-duty loader hydraulic valve body casting. The large-duty loader hydraulic valve body casting comprises a valve body, perpendicular runners, horizontal runners, auxiliary runners and runner openings. The valve body is internally provided with the six perpendicular runners, the seven horizontal runners and four horizontal transverse runners. The perpendicular runners from the first one to the sixth one communicate with the four transverse runners, and the second transverse runner and the third transverse runner communicate with the seventh longitudinal runner; the first transverse runner communicates with the seventh longitudinal runner through an inclined runner, the fourth transverse runner does not communicate with the seventh longitudinal runner, and the six perpendicular runners communicate with the midpoint of the perpendicular runners from the first one to the sixth one; and the multiple auxiliary runners are formed between the horizontal runners and the perpendicular runners, and the seven horizontal longitudinal runners are provided with a plurality of oil grooves. The large-duty loader hydraulic valve body casting has the advantages of being high in integration level, reasonable and compact in structure, high in reliability, convenient to cast, use and maintain, safe, capable of saving energy, long in service life and wide in application range, the casting qualified rate is increased greatly, and the casting cost is reduced.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment manufacturing, in particular to a large loader hydraulic valve body casting. Background technique [0002] Loader is a kind of earthwork construction machinery widely used in highway, railway, construction, hydropower, port, mine and other construction projects. It is mainly used for shoveling bulk materials such as soil, sand, lime, coal, etc. , hard soil, etc. for light shoveling and digging operations. Because fork-lift truck has operating speed fast, efficiency tall, maneuverability good, operation is light wait for an advantage, the main machine that accordingly it makes construction of the cubic metro of earth and stone in project is planted one of. [0003] Most of today's large loaders have hydraulic control systems. The hydraulic system is composed of hydraulic pumps, control valves, hydraulic cylinders, hydraulic motors, pipelines, fuel tanks, etc. The hydraulic transmissio...

AI Technical Summary

Problems solved by technology

[0004] The hydraulic valve is a key component of the hydraulic system. The hydraulic valve structure and precision requirements of large loaders are very high, especially for some valves with multiple oil circuits, the temperature rises rapidly during the working process, and the temperature is too high, causing the hydraulic valve to not work stably. , and the amount of wear is large, the pressure pulsation or impact vibration of the hydraulic system will cause the valve body to leak, and it is easier to leak under the high-pressure working state with a pressure ≥ 35Mpa. The hydraulic valve body casting shrinkage cavity, shrinkage porosity, internal pores, etc. The problem is often a defect of the product, requiring higher internal structure compactness and the straightness of the main valve hole casting blank is less than 0.8mm

Images