- Analysis of seal leakage of roller
- Roller is an important load-bearing part of crawler construction machinery (commonly known as "lower roller"), which is composed of roller body, supporting shaft, left and right supporting seat and sealing components. The supporting shaft is fixed on the platform frame through the left and right supporting seats. There is a pressed shaft sleeve in the wheel body to rotate with the supporting shaft. A sealing component is installed between the rotating wheel body and the fixed left and right supporting seats to keep the lubricating oil seal between the supporting shaft and the shaft sleeve. The sealing assembly is composed of a pair of double conical metal sealing rings and two butadiene rubber fixed compression rings. The rubber ring is respectively installed in the sealing seat mouth of the wheel body and the support seat. Because the metal sealing ring bears the extrusion support of the rubber ring and makes its annular blade belt closely mesh in rotation, the seal belongs to the flo
- How to effectively extend the life of construction machinery crawler?
- 1. Causes of track damage
1) If the stones in the track are not removed in time, soil or gravel will roll into the track and be squeezed between the guide wheel, drive wheel and track when the track rotates, which will make the track elongate. When the extrusion force in the track exceeds the bearing force of the chain rail, the chain rail will break. If the soil or gravel is rolled into the chain rail, the guide wheel and the supporting wheel will not be controlled by the rail chain, and the track will be formed. At this time, if the driver forces the track to derail instead of loosening the tension cylinder of the track, the track is easy to break, and the wear of the track and the four wheels (guide wheel, supporting wheel, carrier roller and driving wheel) will be accelerated.
- Track maintenance, bottom maintenance can not be ignored
- To do a good job in the maintenance of the equipment can maintain the good performance of the crawler crane equipment, increase the service life of the equipment, reduce the possibility of accidents in the operation of the crawler crane, so as to reduce the delay of work and obtain better economic benefits. First of all, we should have a deep and detailed understanding of the mechanical equipment used, carry out regular and irregular inspection in the daily operation process, make clear the deficiencies and design defects of the equipment, make a detailed analysis of the existing problems and defects, and determine the appropriate maintenance methods. Regular and proper maintenance is one of the conditions to keep crawler crane running healthily.
- How to avoid derailment of excavator crawler chain and how to install it
- Track installation
The construction environment of the excavator itself is relatively bad. It is basically insulated from the flat land. It is common to encounter potholes and muddy roads. In addition, some machines are relatively old, so it is common to lose the chain!
If the crawler of the excavator falls off, many drivers will adopt their own methods to install the crawler. However, if they are new beginners and Xiaobai, they will be in a panic. On one hand, there are excavators unable to walk, and on the other hand, urgent engineering work. How can we install the crawler with speed?
- How to deal with oil leakage of excavator tugboat
- The four wheel area is very familiar to the drivers who deal with excavators every day. In general, the four wheel area is a vulnerable part. If it is broken or worn, it can be replaced directly.
It's easy to replace. The fear is that there is oil leakage in the tugboat. Oil leakage means finding the fault point, and the process of troubleshooting is not simple. Sometimes it takes money to dismantle and inspect.
- Have you ever met the situation of crawler crane walking "crooked" road
- As a common fault of crawler crane, this paper gives an inventory of the fault analysis and corresponding solutions of crawler crane running deviation.
Case fault description: Right deviation in forward and no deviation in backward. Deviated when filling the door.
The traveling system of crawler crane is mainly composed of mechanical parts (driving wheel, guide wheel, drag chain wheel, support wheel, track) and hydraulic driving part. In line with the principle of easy first and then difficult, the mechanical part is analyzed first.
- Daily maintenance of excavator guide wheel
- The walking part of the excavator is composed of carrier wheel, supporting wheel, driving wheel and rail link. When running for a certain period of time, these parts will wear to a certain extent.
However, if the idea of daily maintenance, as long as a little time for proper maintenance, can avoid the future "excavator leg surgery.". For you to save considerable maintenance funds, and also can avoid the delay caused by maintenance.
- The method of improving the service life of excavator roller
- The structure of the roller is mainly divided into wheel body, roller shaft, shaft sleeve, sealing ring and end cover. If the hardness of the roller axle and shaft sleeve is not up to standard, there will be oil leakage less than a few days after installation.
- Production technology of chain rail link
- The chain rail link is an important part of the excavator. It is because of the existence of the link that the huge excavator can "walk". As long as the excavator chain rail link in the running problems, then the entire excavator operation will be very difficult. Therefore, the quality of chain rail link directly affects the use of excavator.
So how is such an important link produced? At present, there are two main processes to produce the link, one is casting and the other is forging.
- What are the methods of chain surface treatment
- Shot peening
A kind of surface treatment, according to the need to use a certain diameter of steel shot on the surface of parts, forming uniform small pits, in order to improve the surface fatigue strength of the chain.
After the parts are heated to a certain temperature, they are cooled by chemical water solution and saponified to make the surface color of parts appear blue. After blue treatment of the chain appearance beautiful, but also the role of rust.
The parts are immersed in a certain temperature phosphating solution to form a phosphating layer on the surface of the parts, which can make the surface color of the parts appear black or gray, improve the beauty of the chain and achieve the purpose of anti-corrosion. These phosphating solutions can be recycled and have less environmental pollution.
Plate with nickel
Nickel coating is formed on the surface of parts by electroplating or el
- Disassembly and installation of crankshaft front and rear oil seals of Hitachi excavator
- There are 11 steps to remove the crankshaft front oil seal of Hitachi crawler excavator
(1) Drain the coolant.
(2) Remove the starter.
① Disconnect the grounding cable of the starter.
② Loosen the upper and lower mounting nuts from the starter and remove the starter from the flywheel housing.
- Problems of roller
- A. The wheel body is worn. The reason for this situation is that the steel used is not qualified, or the hardness of the material during heat treatment is low, and the wear resistance is lack;
B. Oil leakage. The bearing wheel shaft is continuously rotating through the shaft sleeve, and the wheel body should be lubricated to be smooth. However, if the sealing ring is not good, it is easy to cause oil leakage. In this way, the shaft and the shaft sleeve are easy to wear and tear under the condition of no smoothness, forming that the product cannot be stopped using.