A steering system and method based on an improved hydraulic steering bypass priority valve

Abstract

The present disclosure discloses a steering system and method based on an improved hydraulic steering bypass priority valve. The improved hydraulic steering bypass priority valve includes: the oil outlet end of the compensation valve is connected to the check valve A through the CF oil port, and then It is connected with the oil inlet of the hydraulic steering gear, and the oil outlet end of the compensation valve is connected with the constant flow valve of the hydraulic multi-way valve of the working device through the check valve B; the oil outlet end of the compensation valve is connected with the check valve B, EF oil The port is connected to the oil inlet of the variable pump, the oil outlet of the priority valve is connected to the pressure compensator of the hydraulic multi-way valve of the working device through the EF oil port, and the LS relief valve is integrated into the hydraulic steering bypass priority valve, which is connected with the hydraulic Connect to the LS port of the steering gear. In the improved hydraulic steering bypass priority valve, the compensation valve throttling groove and the priority throttling groove are independent of the compensation valve and the priority valve respectively. When matching different systems, there is no need to redesign or select models, which improves its versatility and reduces the cost of Operation and maintenance costs, easy production and processing.

Description

technical field [0001] The present disclosure relates to the technical field of loaders, in particular to a steering system and method based on an improved hydraulic steering bypass priority valve. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] In the existing wheeled construction machinery, especially the wheel loader, higher requirements are put forward for the complex operation and low power consumption, which makes the combination of the LUDV hydraulic system with anti-flow saturation function and the hydraulic steering bypass priority valve The application will have a wide application space. In the current hydraulic steering bypass priority valve design, the compensation valve throttle groove and the priority throttle groove are mostly designed on the same valve stem, and the integration with the bypass priority valve spool makes i...

AI Technical Summary

Problems solved by technology

In the current hydraulic steering bypass priority valve design, the compensation valve throttle groove and the priority throttle groove are mostly designed on the same valve stem, and the integration with the bypass priority valve spool makes its structure more complicated, the cost increases, and it is not convenient for production and processing. , and it leads to the need to redesign and adjust the size of the two throttle grooves in the application of different construction machinery products to adapt to the load change, and it cannot be universalized; because there is a matching relationship between the compensation valve throttle groove and the priority throttle groove, when the matching is different It is necessary to redesign the throttle groove of the valve core during the system, which reduces its versatility and increases the operation and maintenance costs; because the throttle groove of the compensation valve and the priority throttle groove share the same spring, when the stiffness of the spring weakens during use, it will Seriously affect the performance of the bypass priority valve; the steering gear must be equipped with an Ls relief valve; due to the compact structure and limited space of the steering gear, the Ls relief valve increases its design and processing difficulty, failure rate, and maintenance difficulty; the Ls check valve is independent , increasing the leakage point and pipeline configuration, there is a possibility of reverse installation of the oil port; the control valve stem is in direct contact with the valve body, and there is a risk of scratching the valve body and valve stem when the oil cleanliness is insufficient, and it is difficult to repair after scratching

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