High-speed and low-speed limiting method of hydraulic speed controller

Abstract

A high-speed and low-speed limiting method of a hydraulic speed controller comprises a front cover assembly, a speed-controlling screw rod component installed in the front cover assembly, a speed-controlling gear component, a speed-controlling cross rod, a middle gear component and a rotation speed indication gear. The rotation speed indication gear is formed in the mode that a whole circle gear is provided with two mutually-vertical section faces which serve as a highest-rotation-speed limiting face and a lowest-rotation-speed limiting face respectively. Correspondingly, the inside of the front cover assembly of the speed controller is provided with two parallel limiting screw rods, the two limiting screw rods are equal in height, and the highest-rotation-speed limiting face and the lowest-rotation-speed limiting face of the rotation speed indication gear are alternately matched with the two limiting screw rods to achieve the limiting purpose. Compared with a common speed controller, the hydraulic speed controller achieves the effect that the high rotation speed and the low rotation speed can be limited and are adjustable within the rotation speed range, and the speed of a diesel engine can be controlled at high accuracy, so that a stable work rotation speed is available.

Description

technical field [0001] The patent of the invention belongs to the field of diesel engines, and in particular relates to a hydraulic speed governor for fishing boat diesel engines with a power of less than 2000kW. Background technique [0002] With the advancement of science and technology and the continuous improvement of the market's performance requirements for fishing boat diesel engines, modern fishing boat diesel engines are developing in the direction of high performance, high reliability, low noise, low emission, and low fuel consumption. As the key components of fishing boat diesel engines The governor must also adapt to the development of fishing boat diesel engine technology. [0003] For fishing boats, the harsh working environment determines that the diesel engine governor must have good performance and reliability. In the past, the governor could only limit its maximum operating speed in one direction. Generally, it was mainly for the safety of the diesel engin...

AI Technical Summary

Problems solved by technology

In the past, the governor could only limit its maximum operating speed in one direction. Generally, it was mainly for the safety of the diesel engine and to avoid the overrun of the diesel engine. Therefore, the maximum speed of the governor was limited, and the low speed was mainly controlled by the diesel engine control system. To adjust, the governor itself has no low speed limit

Or some speed governors can also limit the high and low speeds by adopting the limit method with complex structure, but the speed range of the limit is very narrow. The high limit meets the requirements of the diesel engine, and the low limit cannot meet the requirements of the diesel engine. RPM demand

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