The hydraulic system provides power for the operational devices of an engineering crane. Proper maintenance of the hydraulic system is crucial for enhancing the crane‘s operational reliability. Obvykle, hydraulic systems must undergo flushing before they are officially put into use. The purpose of this flushing process is to remove contaminants, metal debris, fibrous compounds, železo […]
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Load limiters and load moment limiters are collectively referred to as overload protection devices. Overloading is one of the primary causes of crane accidents. In mild cases, overloading can damage crane components, causing motor overload and structural deformation. V těžkých případech, it can result in broken beams, tower collapse, arm fractures, or even complete machine […]
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Factor 1: Unsafe Conditions of the Crane Itself One of the primary reasons for the falling of loads from crane hooks is the inherent unsafe conditions of the crane itself. These conditions can stem from various sources, including design flaws, manufacturing defects, improper installation, and inadequate maintenance. 1. Design Deficiencies Poorly designed cranes can present […]
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The structure of the short-stroke block brake is shown in Figure 1-17. When the electric motor is powered on, the electromagnet coil connected in parallel with the motor winding is also energized. This generates an attractive force in the stationary core (9), which pulls the moving core (8). Consequently, the push rod (7) is pushed […]
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1. Classification by Length Ball mills can be classified based on the ratio of their length to diameter. This classification affects their grinding efficiency, usage, and application in various industries. (1) Short Ball Mill A ball mill is considered short if its length-to-diameter ratio is less than 2. It is commonly referred to simply as […]
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As a type of lifting and transportation machinery, large tower cranes are prone to rust and corrosion due to various unresolved issues. The steel structures of large tower cranes are particularly susceptible to rusting when exposed to air for extended periods without adequate protective measures. This corrosion occurs when the steel structure reacts chemically with […]
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1. Proper Positioning During Lifting Operations During lifting operations, standing directly beneath the boom, the suspended load, or within the lifting path can be extremely dangerous. The triangular area formed by the guide pulley and steel cable, the surrounding area of the fast rope, or the force direction of a diagonally pulled hook are all […]
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já. Safety Operation Regulations 1. Operator Qualifications Before operating the plate rolling machine, the operator must undergo proper training to fully understand the machine’s structure, performance, and operating procedures. Only qualified personnel should be allowed to use the equipment to prevent accidents and ensure safety. 2. Pre-Operational Inspection Before starting the machine, the following checks […]
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1. Broken Working Steel Wire Rope When one end of the gondola’s working steel wire rope breaks, Pozastavená platforma se nakloní. Jakmile dosáhne určitého sklonu, Bezpečnostní zámek se automaticky zapojí, Zajištění platformy pro lano bezpečnostního drátu. V takové situaci, Stavební personál uvnitř gondoly by měl zůstat klidný. It […]
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1. Initial Maintenance for New Machines After the first 250 hours of operation, perform the following maintenance tasks: Replace the fuel filter and additional fuel filter. Inspect the valve clearance of the engine. 2. Daily Maintenance Perform these checks and maintenance activities on a daily basis: Inspect, clean, or replace the air filter. Clean the […]