Proportional directional valve lightweight spool and proportional directional valve based on slm technology

Abstract

The invention discloses a proportional reversing valve lightweight valve element based on the SLM technology and a proportional reversing valve. The proportional reversing valve lightweight valve element comprises a valve element main body. A plurality of regulator orifice sets are formed outside the valve element main body in the axis direction of the valve element main body. The regulator orifice sets are composed of a plurality of regulator orifices evenly distributed in the circumferential direction of the valve element main body. The two sides of each regulator orifice are both provided with bulges. All the bulges are of a hollowed-out structure. A chamfer with the section being in a quadratic parabola shape is formed between every two adjacent bulges. According to the valve element, provided with the bulges of the hollowed-out structure and the chamfers with the section being in the quadratic parabola shape, of the proportional reversing valve, the fluid motion state can be effectively changed, and fluid power is reduced; and meanwhile, the mass of the valve element can be remarkably lowered, the frequency response can be improved, friction force during motion is reduced, the using performance of the proportional reversing valve is remarkably improved, and the service life of the proportional reversing valve is remarkably prolonged.

Description

technical field [0001] The invention belongs to the field of electro-hydraulic proportional control, and in particular relates to a lightweight valve core of a proportional reversing valve based on SLM technology and a proportional reversing valve. Background technique [0002] Electro-hydraulic proportional directional control valve is an important part of electro-hydraulic proportional control technology. figure 1 It is a cross-sectional view of an existing direct-acting proportional directional valve, which is mainly composed of a valve body, a valve core, a pressure spring, a proportional electromagnet and an amplifier. The spool is placed in the valve body, and the spool moves left and right through the attraction of the proportional electromagnet to achieve reversing, so as to realize the change of flow rate or the on-off of oil circuit. The spool is a key part of the proportional directional valve, and its structural design and manufacturing quality have a decisive i...

AI Technical Summary

Problems solved by technology

However, because the design and manufacture of the spool are limited by traditional machine tool processing, many spool structures with superior performance only stay in the design stage

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