回转式断路器 are one of the most suitable pieces of equipment for scalping off undesirable material and performing size reduction in a single operation. 主要用于加工原煤原料, 旋转式破碎机可以接受高容量的大块尺寸. 它们是耐用、低维护、低功耗的机器.
回转式破碎机的设计及工作原理
回转式断路器 consist of a cylinder that rotates at a relatively slow speed on four trunnion rollers. Thrust rollers mounted on the base frame at both ends of the 旋转开关 prevent lateral movement as the cylinder rotates.
A conventional 旋转开关 drive uses an electric motor/coupler/reducer drive configuration. A large driven sprocket is bolted to the machined circumference of the cylinder’s feed end, 而一个较小的驱动链轮安装到减速器输出轴. An engineered chain connects the two sprockets and is enclosed in an oil bath chain case.
筒体上有防尘罩，以容纳易挥发的煤尘. The dust housing is equipped with replaceable dust seals and inspection doors to facilitate maintenance.
ROM coal and refuse that enter the cylinder are picked up by internal steel lifters and carried to approximately the 11 o’clock position on the cylinder diameter. 从那里，材料掉落到内衬的筛板上. 这个升降动作, 再加上冲击较硬的垃圾, 使煤破碎并通过筛板开口. The repeated lifting and dropping action effectively reduces the coal and passes it to the product stream, 而不可破碎的废料继续通过圆筒前进.
The lifters are adjustable for advancing and retarding the flow of material through the 旋转开关.
然后，废物从气缸的另一端排出, 通过螺栓固定在端部的卸料犁辅助.
大小和选择
当考虑 用什么类型的破碎设备来减少ROM煤, the characteristics of the feed material are often one of the most important factors. This is especially true when the ROM coal stream contains significant quantities of refuse, 比如岩石, timbers and similar uncrushable waste material that can be a nightmare for downstream processing.
Crucial to the selection process is gaining a thorough understanding of the material to be crushed and the refuse that may be encountered. Refuse may consist of hard rock, pyritic sulfur balls, 粘土, mine timbers and roof bolts.
For any coal crushing application, the following factors must be considered when 为工作选择合适类型的破碎机，粒度机或破碎机:
- 待粉碎物料
- 饲料大小
- 期望菠菜网最稳定正规平台_最全菠菜网大全尺寸
- 能力要求
- 饲料中垃圾的种类和百分比
- 超大号和半码的百分比
- 煤的硬度
- 水分含量
- 分级
回转式断路器 perform most effectively on soft to medium-hard coal with a significant percentage of rock. 煤炭 that is too hard or too woody may not break down and can lead to product being discharged with the reject material. Not enough harder refuse in the feed may prevent the coal from breaking as desired. Refuse that is too soft and breaks easily may pass through the screen plates and compromise the quality of the final product.
鉴定煤和废渣的硬度是很有必要的. 垃圾被认为是任何不属于煤炭的材料, 比如页岩, 板岩, 粘土, 砂岩或石灰岩. The hardness or grind of the coal is usually expressed as a Hargrove Grindability Index (HGI) number, 而垃圾通常是用它的抗压强度来测量的，单位是psi.
水分含量 and the presence of 粘土 in the feed material must also be recognized. Moist fines and 粘土s can plug the screen plate holes and can also cause a cushioning effect on the falling material, 抑制煤在冲击下破碎的能力. An all-in feed is acceptable; however, it is recommended that a scalping screen be installed prior to the 旋转开关 to remove the undersized material, 从而提高了旋转破碎机的效率.
直径和长度
旋转式破碎机通常以其直径和长度作为参考, 有多种尺寸可供选择. 跌落破碎测试可以确认应用程序所需的尺寸. Establishing the most favorable drop height aids in determining the breaker diameter, 而液滴的数量有助于确定断路器的长度.
筛孔尺寸
Throughput capacity and desired final product size are also vital to selecting a 旋转开关. A 旋转开关’s maximum capacity is relative to the product size it is required to produce. 筛板开口越小，等于容量评级越低.
回转式断路器 can accept feed lumps as large as 30” (762 mm) and discharge product sizes ranging from 1.5”至6”(38毫米至152毫米). The desired product size will determine the diameter of the holes used in the screen plates. 选择的筛孔直径比所需菠菜网最稳定正规平台_最全菠菜网大全尺寸大½英寸. For example, if the desired product size is 2” (50 mm), the screen hole size would be 2.5” (63 mm). 这是因为当断路器旋转时, 这些洞对下落的物质来说呈椭圆形.
都是关于维护的
以相对较低的功耗著称, typical 旋转开关 requirements can range from 50-125 hp for most ROM coal applications. 加上低运行速度, the simple drive arrangement allows for minimal maintenance and low operating costs.
对齐
加上定期维护程序, accurate alignment of the 旋转开关 is essential to getting the most from the equipment. 精密对中是旋转设备成功运行的关键. An improperly aligned cylinder can lead to the premature wear of key elements, 如气缸和耳轴轮胎, 推力滚子, 轴承, 汽缸链轮, 链条及其它传动部件. 不正确对准的旋转破碎机可能, 随着时间的推移, develop a wobble or vibration that could create unwelcome noise and possible damage to its structural supports.
润滑
润滑对设备运行至关重要. Many component failures are directly traceable to factors such as contaminated lubricant, 润滑油使用不当和/或用量不当. Such failures are often preventable through good housekeeping and proper lubrication practices.
应采取以下几个基本步骤:
- Seal all grease and oil storage containers to prevent dust, grit and moisture contamination
- 安装前彻底清洗所有的油脂和油路
- Wipe all fittings with a clean rag before lubricating to prevent forcing of contaminants into the component
- 建立定期的润滑计划并严格执行
- 目视检查所有润滑点，确保润滑适当
旋转破碎机上常用的润滑部件包括:
- 耳轴滚子轴承
- 推力滚子轴承
- 检查链箱内的油位
Centrally banked lubrication lines can be fed through an automatic lubrication system to keep a positive grease flow to all 轴承.
在一次操作中对进料流进行脱皮和对煤菠菜网最稳定正规平台_最全菠菜网大全进行上浆, 回转式断路器 are ideal for processing ROM coal containing considerable amounts of refuse. 与一个 简单，耐用，易于维护的设计, 回转式断路器 have been a substantially economical element in the coal mining industry.
在选择回转式破碎机时涉及到许多因素, 正确的选择取决于准确的应用程序细节. 达到最佳效果, a 旋转开关 manufacturer should be consulted to review all details and provide a professional recommendation.
