A8516-040 汽轮机机械液压调速器

Description

A8516-040 汽轮机机械液压调速器

A8516-040是一款汽轮机机械液压调速器是汽轮机控制系统中的重要组成部分，它负责根据汽轮机的运行状态和外界负荷的变化，自动调节汽轮机的转速，确保机组在安全、稳定、经济的状态下运行。

A8516-040的工作原理主要基于导水叶开度调节过程、硬反馈作用过程和软反馈作用过程。当机组带负荷运行时，若外界负荷突然减小，机组的转速会升高。此时，调速器中的离心飞摆的转速会同步上升，导致离心飞摆重块所受的离心力增大，重块外张。这一动作会带动引导阀转动套上移，从而开通引导阀中的通道，使辅助接力器上腔的油排出，导致上腔压力小于下腔压力。随后，主配压阀阀体会同辅助接力器活塞一起上移，接通压力油到主配压阀关闭腔的通路，主接力器活塞右移。这一系列的机械动作会使导水叶开度减小，从而减少进入水轮机的流量，使机组停止加速并恢复到额定转速。

硬反馈作用过程是调速器实现精确控制的关键环节。当调节达到目标时，硬反馈机制会终止调节过程，防止过度调节或调节不足。

此外，A8516-040具备较高的可靠性和稳定性，能够适应各种复杂的运行环境。同时，随着技术的不断发展，现代的机械液压调速器还具备了更多的智能化和自动化功能，能够更好地满足现代汽轮机的控制需求。

需要注意的是，对于机械液压调速器的维护和管理也非常重要。定期对调速器进行检查、清洁和维修，确保其处于良好的工作状态，对于保障汽轮机的安全稳定运行具有重要意义。

总的来说，A8516-040是汽轮机控制系统中的核心部件，它通过精确的自动调节，确保机组在各种运行状态下都能保持稳定的转速和性能。

A8516-040 汽轮机机械液压调速器

A8516-040 is a steam turbine mechanical hydraulic governor is an important part of the steam turbine control system, it is responsible for automatically adjusting the speed of the steam turbine according to the running state of the steam turbine and the change of external load, to ensure that the unit in a safe, stable and economic state of operation.

The working principle of A8516-040 is mainly based on the opening adjustment process of the water guide blade, the hard feedback process and the soft feedback process. When the unit is running with load, if the external load suddenly decreases, the speed of the unit will increase. At this time, the rotational speed of the centrifugal pendulum in the governor will rise synchronously, resulting in the increase of centrifugal force on the centrifugal pendulum weight and the outer tension of the weight block. This action will drive the pilot valve rotation sleeve to move up, thereby opening the channel in the pilot valve, so that the oil in the upper chamber of the auxiliary relay is discharged, resulting in the upper chamber pressure is less than the lower chamber pressure. Subsequently, the main distribution valve body moves up together with the auxiliary relay piston to connect the pressure oil to the main distribution valve closing chamber, and the main relay piston moves to the right. This series of mechanical actions will reduce the opening of the water guide blade, thereby reducing the flow into the turbine, so that the unit stops accelerating and returns to the rated speed.

The process of hard feedback is the key link to realize precise control of the governor. When the adjustment reaches its goal, the hard feedback mechanism terminates the adjustment process and prevents over – or under-adjustment.

In addition, the A8516-040 has high reliability and stability, and can adapt to a variety of complex operating environments. At the same time, with the continuous development of technology, modern mechanical hydraulic governor also has more intelligent and automated functions, which can better meet the control needs of modern steam turbines.

It should be noted that the maintenance and management of mechanical hydraulic governor is also very important. Regular inspection, cleaning and maintenance of the governor to ensure that it is in good working condition is of great significance to ensure the safe and stable operation of the steam turbine.

In general, the A8516-040 is the core component of the turbine control system, which ensures that the unit can maintain stable speed and performance under various operating conditions through precise automatic regulation.