How to prevent excavator bucket cylinder damage

Excavator filter manufacturers share:
1. Inspection methods and results When the bucket cylinder moves slowly or does not move, check the appearance of the bucket cylinder. If there is no abnormality, check the oil return filter.
With the frequent operation of the bucket cylinder piston, particles generated due to wear and the like will flow with the working medium and be intercepted by the return filter element in the return line. If a large black rubber block is found in the oil return filter, it indicates that the piston seal is broken; if iron scraps of different sizes are found, it indicates that the steel seal ring generates friction particles with the inner wall of the cylinder; if there is gray or yellowish translucent The nylon material indicates damage to the wear ring.
Excavator filter manufacturers have found through inspection that the machine return filter contains a large number of metal powder, black rubber blocks, brown nylon and small metal particles. After checking the bucket cylinder, it was found that the piston seal ring and the wear ring were completely damaged, and the 2 steel rings were stuck in the piston ring groove and they were fractured. The inner wall of the cylinder barrel was severely strained, and there was a lot of metal powder at the bottom of the cylinder. Particles. The above inspection results show that the bucket cylinder has been damaged.
2. Analysis and analysis of the reasons It is believed that due to factors such as metal fatigue, the steel ring on the piston of the bucket cylinder is broken, causing the piston to directly contact with the cylinder. The steel ring is broken and the bucket is constantly scraped during the frequent expansion and contraction of the piston rod. The inner wall will pull the cylinder wall and cause internal leakage, so that the speed of the bucket cylinder will decrease. With the increase of working hours, the damage of the seal ring and the pulling of the cylinder wall are continuously aggravated, resulting in more serious internal leakage of the bucket cylinder, so that the control valve cannot control the action of the bucket cylinder.
3. Preventive measures
(1) Excavator filter manufacturers share the normative operation of the excavator. If the piston of the bucket cylinder reaches the end of the stroke of the rod cavity, the inner limit ring of the excavator filter can easily damage due to pressure and impact, thereby reducing the bucket cylinder. Service life. Therefore, when operating the machine, the bucket cylinder should retain a stretching allowance of 10-20 cm. This operation can prevent fatigue damage of steel rings and limit rings on the piston due to prolonged heavy load impact. When digging excavators in Wuhan excavator, the depth of excavation and the excavation range constantly change, so the bucket bucket should be made as much as possible during operation. Make a 90° angle with the connecting rod, stick cylinder and stick, do not always reach the end of stroke. This allows the excavator to achieve maximum digging force and maximum work efficiency. Excavator filter manufacturers share
(2) Reasonable maintenance should be based on the excavator's operating conditions and operating conditions, change oil maintenance according to local conditions. Compared with bucket digging, hydraulic oil often deteriorates more quickly when it is broken with a hydraulic breaker. When working with a hydraulic breaker, maintenance should be performed as shown in the attached drawings. As can be seen from the drawing, when the hydraulic excavator does not use a crusher, its hydraulic oil can be replaced for up to 5000 hours. When the excavator only uses the crusher, hydraulic oil should be replaced every 600 hours. If the excavator is working with both the bucket and the crusher, it is necessary to find a reasonable time for replacing the hydraulic oil in the drawing based on the actual operating rate of the excavator using the crusher. For example, when the actual working rate of an excavator using a crusher is 20%, the replacement time of the hydraulic oil is about 2 000 h; when the excavator uses a crusher, the actual operating rate is 50%, and the hydraulic oil replacement time is 1 000 h. Left and right; when the actual operating rate of the excavator using the crusher is 80%, the replacement time of the hydraulic oil is about 750 h. Excavator filter manufacturers share.
In addition, when a hydraulic excavator uses a hydraulic breaker, a dedicated excavator filter element shall be added and used every 250 hours (when the actual operating rate of the crusher is more than 50%) as the standard. The additional filter cartridge replacement time is shown in the figure. curve. As can be seen from the figure, the crusher's operation rate is 30% before, the time for the replacement of the crusher filter cartridge is 500 h, the crusher's operation rate is 30% to 50%, and the replacement time is shortened from 500 h. To 250 h. Similarly, when the actual operating rate of the filter element in the hydraulic oil tank is 50%, the replacement time is also advanced to 150 hours. Excavator filter manufacturers share