工程上,一般按热态吊零的载荷分配原则确定弹簧支吊架的受力。所谓热态吊零,是指弹簧支吊架在热态时承受的力应等于冷态时由管系分配给它的力。按这样的原则确定的弹簧支吊架受力使得整个管系中各支撑点承受的自重力在热态时比较均匀,但在热态时管系中各点的总载荷会因位移荷载的作用而不再均匀甚至会出现严重的不合理现象,为此,工程上有时也采用冷态吊零的载荷分配原则。所谓冷态吊零是指弹簧支吊架在冷态时承受的载荷取冷态时由管系分配给它的载荷。与热态吊零相反,此时在热态情况下管系各支撑点承受的自重载荷已不在均匀,而总载荷(包括位移载荷)则是自然分配。
Engineering, general lift by hot zero load distribution principle of steam-water spring force is determined. Hot zero, refers to the steam-water spring bears should be equal to the force while in hot cold allocated by the piping system to its power. Steam-water determined according to the principle of this spring force makes the whole piping system of each point on the gravity of even when hot, but in the hot pipe of each point in the total load will not uniform because of the action of displacement load may even appear serious unreasonable phenomenon, therefore, the project is also sometimes used cold crane load distribution principle of zero. Steam-water cold hung zero refers to the spring in the cold when carry the load by piping when you pick up the cold load assigned to it. Contrary to lift hot zero, this time under the condition of hot piping each strong point under the dead weight uniform load is no longer, and the total load (including displacement load) is a natural distribution.
为防止可变弹簧支吊架引起管系在热态或冷态时有较大的载荷转移,工程上常控制它的载荷变化率不超过25%。根据这一限制条件,就可以确定弹簧支吊架的刚度 k。在确定弹簧支吊架的刚度时应遵守这样一个原则:在弹簧支吊架能满足管系热态和冷态的承载要求而且载荷变化率不超过规定值的情况下,应尽可能选用刚度最小(指最小规格和最小允许位移值)的弹簧。按这样的原则选取的弹簧支吊架,其安装尺寸最小,价格最便宜,而且实际的载荷变化率最小,探伤机。
To prevent variable spring caused steam-water piping in hot or cold have larger load transfer, load which usually control it in engineering rate less than 25%. According to the restrictive conditions, can determine the steam-water spring stiffness k. When determining the steam-water spring stiffness should follow such a principle: in the steam-water spring can meet the piping hot and cold load requirements and load change rate is less than specified value, should as far as possible choose stiffness least (minimum specifications and minimum allowable displacement value) of the spring. Selected according to the principle of the spring hanger, its minimum installation size, price the cheapest, and the actual load rate, minimum inspection machine.
弹簧支吊架主要用于电厂汽水管道或锅炉设备、在运行中产生热位移及其设备装置上。根据管道受力情况计算确定的弹簧支吊架工作和热位移要求,本厂将弹簧支吊架按照设计荷载进行整定:即弹簧预压并所定冷态荷载位置上;同时标上冷态时的理论理论工作位置。弹簧支吊架在出厂前制造厂进行了整定,当安装了到管道和设备上后,作有关螺纹调整,将所定销脱开,这时弹簧的实际承载就是设计所要求的冷态荷载。
Boiler steaming-water pipe or in steam-water spring is mainly used for power equipment, the thermal displacement and its equipment in the operation of the device. Calculated and determined according to the pipeline stress situation in the work and the thermal displacement of the steam-water spring requirement, our factory will be carried out in accordance with the design load setting steam-water spring: the spring preloading and position set by the cold load; At the same time, the theoretical working position to be in the cold. Steam-water spring factory for setting before they go out, when installed on the pipeline and equipment, adjust relevant thread, to fix the quotas for marketing release, then spring is the actual bearing design requirements of the cold load.