Load-sensing multi-way valve head valve body and load-sensing multi-way valve head
A load-sensitive, multi-way valve technology, applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problem of single function and form, and achieve the effect of enhancing the adaptability of the host
Active Publication Date: 2018-04-06
XCMG CONSTR MACHINERY
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Moreover, it generally only has the function of a safety valve, and the function is single
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[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0041] Such as Figure 1-3 As shown, it is a schematic embodiment of the first valve body of the load sensitive multi-way valve provided by the present invention. In this exemplary embodiment, the first valve body of the load sensitive multi-way valve includes a valve body, and at least An oil inlet 5, an oil return port 6 and a load feedback port 7 are provided, and at least a primary safety valve hole 1 and a secondary safety valve hole 2 are arranged in the val...
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The invention relates to a valve body of a first link of a load-sensitive multi-way valve and the first link of the load-sensitive multi-way valve. The valve body of the first link of the load-sensitive multi-way valve comprises a valve plate body provided with oil inlets, oil return ports, a load feedback port, a primary safety valve hole and a secondary safety valve hole. A primary oil inlet cavity, a primary oil return cavity, a primary spring side cavity and a primary non-spring side cavity are formed between the primary safety valve hole and a primary safety valve rod. A secondary oil inlet cavity, a secondary oil return cavity, a secondary spring side cavity and a secondary non-spring side cavity are formed between the secondary safety valve hole and a secondary safety valve rod. The oil inlets communicate with the primary spring side cavity and the secondary oil inlet cavity. An oil channel provided with a damping or a plug is arranged in the primary safety valve rod. Correspondingly, the load feedback port communicates with the primary spring side cavity and the secondary oil inlet cavity. An oil channel provided with the damping or the plug is arranged in the valve plate body.The valve body of the first link of the load-sensitive multi-way valve and the first link of the load-sensitive multi-way valve have following beneficial effects: only by exchanging positions of the plug and the damping, a load-sensitive system of a metering pump or a load-sensitive system of a variable pump can be adapted; the adaptability of the multi-way valve to a main machine is improved; and the valve can be used for multiple purposes.
Description
technical field [0001] The invention relates to the field of engineering machinery, in particular to a first valve body of a load sensitive multi-way valve and a first joint of a load sensitive multi-way valve. Background technique [0002] A load sensing system is a hydraulic circuit that senses system pressure-flow requirements and only provides the required flow and pressure. The load-sensing multi-way valve is the core component of the hydraulic system of construction machinery. It is located between the pump and the actuator. When each actuator is working, the working flow is only related to the opening of the valve core and has nothing to do with the load pressure. Although the current load-sensing multi-way valve body is simple in shape, its internal oil passages are designed with complex inner cavities of various shapes and narrow and long special-shaped holes. The casting process is extremely complicated and the versatility is poor, so the design structure is reason...
Claims
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IPC IPC(8): F15B13/02
Inventor 杜璇边斌邵宗光
Owner XCMG CONSTR MACHINERY