执行器将喷嘴延伸到危险的地方

Firefighters have one of the most dangerous and demanding jobs in the public’s eye. They are called upon to face complex fires or natural disasters to save lives or property. Innovative technology to help protect people and property is in high demand from firefighting forces around the world. This urgent demand led Crash Rescue Equipment to team up with Helac Corp. to design a telescoping nozzle on fire trucks that allows the nozzle to penetrate composite fibers and be placed inside small door openings or other restricted areas.

“我们的Snozzle是一种快速攻击工具，可以穿透所有当前建筑，飞机，汽车或火车集装箱材料，包括复合板。通过使用Helac的液压旋转致动器定位我们的刺耳喷嘴，我们可以在各种航空和市政应用中迅速穿透和机动进入紧凑的空间，“坠毁救援设备的总工程师普拉迪北方。

坠机救援设备改变了伸缩动臂组件的整体设计，以克服这个问题。它们将穿孔喷嘴的功能与水​​分开
音量喷嘴和使用Helac的螺旋式液压旋转致动器，将穿孔喷嘴置于伸缩臂上的180度。“因为固有的
features of a rotary actuator, our piercing nozzle could receive higher torque loads and hold side loads during piercing operations,” said North.

Another issue involved mounting. Aluminum castings were used to mount the dual motor nozzle assembly, often causing the castings to break under too much torque or load. The rotary actuators, however, are mounted directly onto the telescopic boom to become a structural part of the boom for increased durability and reliability.

A look inside
这是使液压旋转执行器独特的操作技术，并提供功能强大的特性组合 - 高扭矩和力矩载荷，高角度和紧凑的配置。

They began their search with electric linear cylinders, yet quickly discovered that the geometry wouldn’t fit the application and that the cylinders also needed a much higher degree of rotation. Additionally, cylinders have external rods and linkages that would increase the maintenance costs associated with particle contamination to the electric circuitry.

Electric motors were also researched. This possibility failed to offer the torque requirements or mounting strength needed for the piercing nozzle application.

选中的扶轮致动器提供了工程师s with compact configurations, 180º of smooth rotation, and a durable, enclosed envelope without any external moving parts. It also offered torque output to 740,000 in.-lbs, even though only 4,200 in.-lbs of torque were needed to operate the piercing nozzle.

The L20-4.5-180° rotary actuator was mounted directly onto the boom. Because of the actuator’s high radial and torque capacity, auxiliary bearings are not needed. All external forces are supported solely by the actuator.

“We saved money internally by using the actuator instead of an alternative electric positioning device, even with the addition of the hydraulic lines in the electrical flex tube. More importantly, we were able to offer the same product at the same price point with added capacity,” states North.

Advantages
According to North, there are three significant benefits with rotary actuators. “The rugged design of the entire unit resulted in higher torque output and holding loads, and the compact configuration made it possible for the actuator to fit on the end of the boom,” says North. “Plus, it was more cost effective than other rotary devices that we had researched.”

此外，执行器允许它们将他们的Snozzle产品销售为更多在市政和航空市场的应用。刺耳喷嘴的容量增加
penetrate tougher fiber materials will help the company diversify into these new markets with no additional cost to their customers.

“We’ve recently received customer requests to rotate the piercing nozzle 270º instead of 180,” states North. “Another attractive feature of Helac’s rotary actuators is their ability to rotate up to 360º.”

In another example, firefighters from 8 Wing Trenton used a high tech firefighting truck with a Snozzle to douse a fire at a plastics factory in Cobourg, Ontario in April 2005. The “Red-10” crash truck, normally used for aircraft crashes or fires, helped bring the potentially toxic plume under control with the help of 100 firefighters and 14 departments. “Our job was to cool down the plastic because we were the only ones with the kind of truck that could do that,” recalls 8 Wing firefigher, Corporal Stephane Charest. The cooperation between the military and civilian firefighters turned a potentially deadly situation into a manageable emergency with no loss of life.

崩溃救援设备和Helac公司将继续共同努力发展
可用于保护人员和财产和提供的创新技术
firefighters with a powerful tool.