A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Secondary overflow valve for main control valve of excavator
The invention provides a secondary overflow valve for a main control valve of an excavator. The secondary overflow valve is characterized by comprising a valve sleeve, a main valve element, a spring and a pilot valve seat, the main valve element and the spring are arranged in an inner cavity of the valve sleeve, and the pilot valve seat is arranged at the rear end of the valve sleeve; the front end of the spring is connected with the main valve element, and the rear end of the spring is connected with the pilot valve seat; the rear end of the pilot valve seat is connected with a main valve seat, a small valve seat is arranged in the main valve seat, a pilot valve element, a main spring and an adjusting plunger are arranged in an inner cavity of the small valve seat, the front end of the pilot valve element is precisely matched with the inner cavity of the pilot valve seat, the tail end of the pilot valve element is connected with a main spring, the rear end of the main spring is connected with the adjusting plunger, the rear end of the adjusting plunger is in contact with an adjusting bolt, and the front end of the adjusting bolt extends into the inner cavity of the small valve seat; an oil inlet hole P is formed in the valve sleeve, and a plurality of oil return holes T1 are radially formed in the outer side surface; a plurality of oil return ports T2 are radially formed in the outer side surface of the pilot valve seat; a secondary pressure control oil port Ph is radially formed in the outer side surface of the main valve seat and is communicated to the rear end part of the adjusting plunger through the inner cavity of the main valve seat, a small hole radially formed in the small valve seat and an oil passage in the adjusting plunger in sequence; and the front end face of the main valve element and the front end face of the pilot valve seat are each provided with an inner cylindrical small hole.
本发明提供了一种挖掘机主控阀用二次溢流阀，其特征在于：包括阀套、阀套内腔主阀芯和弹簧、阀套后端导阀座；弹簧前端连接主阀芯、后端连接导阀座；导阀座后端连接主阀座，主阀座内腔小阀座，小阀座内腔先导阀芯、主弹簧和调节柱塞，先导阀芯的前端与导阀座内腔精密配合、尾端连接主弹簧，主弹簧后端连接调节柱塞，调节柱塞后端接触有调节螺栓，调节螺栓前端伸入小阀座的内腔；阀套上开设有进油孔P，外侧面径向多个回油孔T1；导阀座的外侧面径向多个回油口T2；主阀座外侧面径向二次压力控制油口Ph，依次通过主阀座内腔、小阀座径向开设的小孔、调节柱塞内部油道接通至调节柱塞后端部；主阀芯前端端面和导阀座前端端面均开设有内圆柱小孔。
Secondary overflow valve for main control valve of excavator
The invention provides a secondary overflow valve for a main control valve of an excavator. The secondary overflow valve is characterized by comprising a valve sleeve, a main valve element, a spring and a pilot valve seat, the main valve element and the spring are arranged in an inner cavity of the valve sleeve, and the pilot valve seat is arranged at the rear end of the valve sleeve; the front end of the spring is connected with the main valve element, and the rear end of the spring is connected with the pilot valve seat; the rear end of the pilot valve seat is connected with a main valve seat, a small valve seat is arranged in the main valve seat, a pilot valve element, a main spring and an adjusting plunger are arranged in an inner cavity of the small valve seat, the front end of the pilot valve element is precisely matched with the inner cavity of the pilot valve seat, the tail end of the pilot valve element is connected with a main spring, the rear end of the main spring is connected with the adjusting plunger, the rear end of the adjusting plunger is in contact with an adjusting bolt, and the front end of the adjusting bolt extends into the inner cavity of the small valve seat; an oil inlet hole P is formed in the valve sleeve, and a plurality of oil return holes T1 are radially formed in the outer side surface; a plurality of oil return ports T2 are radially formed in the outer side surface of the pilot valve seat; a secondary pressure control oil port Ph is radially formed in the outer side surface of the main valve seat and is communicated to the rear end part of the adjusting plunger through the inner cavity of the main valve seat, a small hole radially formed in the small valve seat and an oil passage in the adjusting plunger in sequence; and the front end face of the main valve element and the front end face of the pilot valve seat are each provided with an inner cylindrical small hole.
本发明提供了一种挖掘机主控阀用二次溢流阀，其特征在于：包括阀套、阀套内腔主阀芯和弹簧、阀套后端导阀座；弹簧前端连接主阀芯、后端连接导阀座；导阀座后端连接主阀座，主阀座内腔小阀座，小阀座内腔先导阀芯、主弹簧和调节柱塞，先导阀芯的前端与导阀座内腔精密配合、尾端连接主弹簧，主弹簧后端连接调节柱塞，调节柱塞后端接触有调节螺栓，调节螺栓前端伸入小阀座的内腔；阀套上开设有进油孔P，外侧面径向多个回油孔T1；导阀座的外侧面径向多个回油口T2；主阀座外侧面径向二次压力控制油口Ph，依次通过主阀座内腔、小阀座径向开设的小孔、调节柱塞内部油道接通至调节柱塞后端部；主阀芯前端端面和导阀座前端端面均开设有内圆柱小孔。
Secondary overflow valve for main control valve of excavator
一种挖掘机主控阀用二次溢流阀
YU HONGBO (author) / QU FANGFANG (author) / LUO XINYI (author) / LIU JIANG (author) / LIU ZHIYUAN (author)
2021-08-24
Patent
Electronic Resource
Chinese
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