Must-Know Operating and Maintenance Recommendations To Keep Your Screw Washers Operating At Their Best
Many aggregate plants use 优质材料螺旋垫圈 for dewatering slurries of minus 1/4-inch by 0 fines for the production of varying specifications of sand. The feed to a 细料螺旋垫圈 could be dry screened minus 1/4-inch material, 直接从湿振动筛上取浆, 砂分级池, or other wet process system that is able to control the top size of the material and classify the sand to the desired grading.
成功的五个步骤
Making sure that a 细料螺旋垫圈 is operating at an optimum setting and retaining the product gradation required can be simply evaluated by following these five steps.
- Make sure that the weirs allowing the overflow of water and undesirable fines are level and positioned to retain the fine sand desired and remove undesirable excess fine sand. 例如, 如果菠菜网最稳定正规平台_最全菠菜网大全中有多余的罚款, raising the side weirs and dropping the back weir often allows for a maximum removal of undesirable fines.
- Rising current classification water beneath the pool area of the screw washer also may need to be adjusted. 如果菠菜网最稳定正规平台_最全菠菜网大全大小的罚款溢出, the screw washer and any rising current water is being injected beneath the pool area. 确保你减少流量或完全关闭它.
- When desired product sized fines are being lost and are overflowing the screw washer, 有时纠正不正确的砂浆进料入口会有所帮助. The pool area in back of the baffle plate near the overflow needs to be as calm as possible so turbulence is reduced to a minimum, 允许细粒菠菜网最稳定正规平台_最全菠菜网大全砂沉淀. Directing the sand- slurry feed to the discharge side of the baffle plate will allow there to be minimum turbulence at the rear of a 细料螺旋垫圈 for optimum fine sand retention.
- 在很多情况下, screw shaft speed is set by the manufacturer for the original application, but it may need to be adjusted — particularly if the screw is turning too fast for the fineness of the sand. 一般, when dewatering average concrete sand that has up to 20% of the product passing through 50 mesh, the peripheral speed for a 细料螺旋垫圈 should not exceed 150 feet per minute or 75% of full speed. Keep in mind that a reduction in speed often needed for fine mason sand will result in a capacity reduction.
- To ensure a sand product that is as dry as possible discharges from a 细料螺旋垫圈, the proper amount of washback or flushing water needs to be injected in the dry deck dewatering area.
简单护理包括安全
While the 细料螺旋垫圈 may be among the simplest machines to maintain in an aggregate plant, appropriate safety precautions must always be taken including a lockout/tagout of the motor starters.
Proper lubrication of the bearings supporting each end of the screw shaft should provide long bearing life since the speed of a shaft is very slow in comparison to other types of process equipment. 浸没式后轴承密封件的润滑需求, if a part of the manufacturer’s design is less than the bearing itself, 确保后轴承得到适当的保护. A non-lubricated seal most always leads to more frequent rear bearing failures and subsequent downtime with a loss of production.
If the discharge end of the screw shaft is supported by a standard pillow block bearing, it is often recommended that a lube line be run down the support to near ground level so that maintenance personnel can regularly supply grease to the bearing if a service platform is not at its level.
Typically, a motor/V-belt drive and shaft-mounted reducer turn the screw shaft. Periodically changing the reducer gear oil in accordance with a manufacturer’s recommendation usually provides long life for this component. If the reducer on the machine has been in service for several years, periodic evaluation of the gear oil for contaminates is warranted to avoid an untimely failure in the middle of a critical production period.
Periodic inspection of V-belts for both wear and tensioning also is recommended to reduce downtime and an unexpected failure.
我需要更换吗?
The need to replace wear shoes can easily be determined by visual inspection. Replacement shoes are typically available in the manufacturers’ standard iron, 氨基甲酸乙酯, 或者橡胶类型. The best abrasion-resistant material for wear shoes may be dependent upon the chemical composition of the sand being dewatered and its physical structure.
The most abrasive sand may be manufactured (granite-like) sand that can abrade or gouge synthetic wear shoes, 与它们的成本相比，往往不能提供合适的寿命.
Doing your own check-up or getting the assistance of the local manufacturers representative can often provide more product-sized sand retention and less downtime, providing the highest possible availability for the operation of a 细料螺旋垫圈.
