Hydraulic assembly, multi-way valve and engineering machinery
A technology of hydraulic components and pressure reducing valves, which is applied in the hydraulic field, can solve problems such as poor coordination of the whole machine and difficult flow separation, and achieve the effect of compact hydraulic components, simplified structure and oil circuit
Pending Publication Date: 2022-07-01
XCMG CONSTR MACHINERY
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Problems solved by technology
However, when the flow demanded by the load exceeds the maximum output flow of the pump, it is difficult for the multi-way valve to ensure that each actuator divides the flow according to the displacement ratio of the spool. become worse
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[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0026] The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise. Meanwhile, it should be understood that, for th...
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The invention discloses a hydraulic assembly, a multi-way valve and engineering machinery. The hydraulic assembly comprises a pressure oil port, a hydraulic cylinder and a hydraulic cylinder, each speed regulating valve comprises a load connecting port connected with a corresponding load in a working state and a pressure oil connecting port connected with the pressure oil port in the working state; the feedback oil way is used for feeding back the pressure oil with the maximum pressure in the pressure oil output by the plurality of load connecting ports in the working state; the plurality of pressure regulating valves are connected between the corresponding speed regulating valves and the pressure oil ports, each pressure regulating valve comprises a plurality of hydraulic control ports and a pressure stabilizing throttling hole, and the plurality of hydraulic control ports comprise a first hydraulic control port, a second hydraulic control port, a third hydraulic control port and a fourth hydraulic control port; in the working state, the first hydraulic control port is connected with the feedback oil way, the second hydraulic control port is connected with the corresponding pressure oil connecting port, the third hydraulic control port is connected with the pressure oil port, and the fourth hydraulic control port is connected with the corresponding load connecting port.
Description
technical field [0001] The invention relates to the field of hydraulic technology, in particular to a hydraulic assembly, a multi-way valve and a construction machine. Background technique [0002] The multi-way valve is the control center of the entire hydraulic system and the core component of the hydraulic system. It is located between the pump and the actuator and other loads. It is used to control the flow and direction of the hydraulic oil, so as to centrally control the movement direction and speed of the construction machinery actuator. The performance of the multi-way valve directly affects the controllability and comfort of the whole system. In the early stage of construction machinery, throttling type multi-way valves were widely used, mainly relying on oil inlet throttling to adjust the flow of the actuator, so the speed regulation characteristics were greatly affected by the load pressure. In some multi-way valves in the prior art, the flow rate of the actuator...
Claims
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IPC IPC(8): F15B13/02F15B11/00
CPCF15B13/021F15B11/00
Inventor 薛源肖刚翟海燕
Owner XCMG CONSTR MACHINERY