Pressure judgment-based automatic switching constant-pressure oil source device
An automatic switching, oil source technology, applied in the direction of fluid pressure actuation device, servo motor, mechanical equipment, etc., can solve the problems of inability to automatically adjust the output flow, low system reliability, low energy utilization rate, etc., to improve energy utilization efficiency, reducing system heat generation, and increasing system reliability
Inactive Publication Date: 2019-01-22
BEIJING INST OF SPACE LAUNCH TECH +1
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Problems solved by technology
[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide an automatic switching constant pressure oil source device based on pressure judgment, and to solve the problem that the traditional oil source scheme cannot automatically adjust the output flow according to the system demand, and when the system demand is high When it is low, most of the flow output by the hydraulic pump returns to the oil tank through the relief valve, which has the problems of high calorific value, low energy utilization rate and low system reliability
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[0021] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0022] figure 1 It is a block diagram of an automatic switching constant pressure oil source device based on pressure judgment provided by an embodiment of t...
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The invention discloses a pressure judgment-based automatic switching constant-pressure oil source device. The pressure judgment-based automatic switching constant-pressure oil source device comprisesan oil tank, a constant-pressure variable pump, an emergency pump, a first high-pressure filter, a second high-pressure filter, an oil return filter and an oil source control unit, wherein the oil tank is connected with the constant-pressure variable pump, the emergency pump and the oil return filter through pipes; the constant-pressure variable pump and the first high-pressure filter through pipes, and the first high-pressure filter is connected with the oil source control unit through pipes; the oil source control unit is connected with the oil return filter and the second high-pressure filter through pipes; the second high-pressure filter and the emergency pump are connected through pipes. The pressure judgment-based automatic switching constant-pressure oil source device solves the problem of high heat value, low energy utilization rate and low system reliability due to the facts that traditional oil source schemes cannot automatically adjust output flow according to system demands and most flow output by hydraulic pumps is returned to oil tanks via overflow valves when system demands are low.
Description
technical field [0001] The invention belongs to the field of hydraulic steering systems for special vehicles, and in particular relates to an automatic switching constant pressure oil source device based on pressure judgment. Background technique [0002] In order to improve steering maneuverability and flexibility, large multi-axle vehicles generally adopt electro-hydraulic steering schemes. The electro-hydraulic steering system is divided into a front axle circuit and a rear axle circuit. The two are not connected by mechanical linkages and are two independent steering axles. . Among them, the rear axle adopts the power-assist alignment hydraulic cylinder to realize the power-assist and alignment functions respectively. The traditional steering oil source adopts quantitative pump oil supply, switching mode based on flow judgment, and relies on flow-limiting distribution safety valve to realize automatic switching between main oil source and emergency oil source. Due to t...
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IPC IPC(8): F15B11/00
CPCF15B11/00
Inventor 张圣卓段培勇张宏宇何寥谢文建凌霄
Owner BEIJING INST OF SPACE LAUNCH TECH