In recent years, the application of excavator olecranon shears in scrap steel processing has become increasingly popular. It is especially suitable for the dismantling of steel structures and factory structures, the dismantling of used vehicles, and the shearing of heavy waste in stock yards. With its flexible and convenient operation, high efficiency and low energy consumption, it is favored by the scrap steel industry. It is a new concept and high-efficiency equipment in the scrap steel industry and will soon become the mainstream equipment for scrap steel and metal dismantling in the future.
However, most of the operators of olecranon shears are directly transferred to the operation of olecranon shears directly from the operation of earthmoving and breaking hammers, and they will directly bring some habits of operating earthmoving and breaker excavators to the eagle. Mouth cut operation is coming. However, in view of the special structure and performance of the olecranon, some bad operating habits need to be strictly prohibited to avoid unnecessary damage to the olecranon and the excavator itself.
First, it is strictly forbidden to use olecranon for hammering operations. The olecranon is different from the breaking hammer. The olecranon is a more complicated device with precise rotating parts, oil supply parts and electrical components. The violent impact will cause the failure of these components and cause the olecranon to be damaged and malfunction. Work. In addition, the movable shaft of the olecranon and the bushing and the blade are all very precise matching structures, and the violent impact can easily lead to the deformation and damage of the structure.
Second, it is strictly forbidden to use olecranon scissors to swing the car with a pestle. Excavator drivers are familiar with an operation called "swinging with a pestle", which is to support the bottom surface with a bucket and breaker in front of the forearm, pressurize the front end of the chassis, and then rotate the chassis to change the direction of the crawler to turn on the spot. , Instead of traditional turning methods. Ordinary excavator attachments are generally simple and bulky, such as bucket breakers, etc., which will not cause problems. But the olecranon is lighter, more sophisticated and more complex than these attachments. In particular, the rotating parts of the olecranon are easily damaged during this operation. Most of the olecranon slewing supports, motors and gears are damaged because of this poor operation.
Third, it is strictly forbidden to operate the motor for turning while cutting. Due to the structure of the olecranon, a large motor and transmission device cannot be configured, and it can only meet the rotation position of the cutting head in an unloaded state. If the motor is operated while cutting, the motor will often be overloaded, and it is easy to damage the motor and the transmission gear.
Fourth, it is strictly forbidden to use olecranon for tearing operations. Many drivers like to bite the material and tear it off when using olecranon shears for demolition and shearing operations. However, this operation can easily cause damage to the forearm cylinder of the excavator. In severe cases, it can directly cause the forearm. The piston rod of the cylinder broke on the spot, causing danger and injury to personnel and vehicles. In addition, this kind of operation can easily lead to the loosening of the bolts of the jaw knife of the olecranon, which will damage the jaw knife in the subsequent cutting.
Fifth, it is strictly forbidden to use olecranon for swing sweeping operations. Many operators like to use the cutting head to sweep or move the material to the side while cutting the scrap steel on the ground. This kind of job is also easier to damage the olecranon. Generally, they think that the cut material is not heavy, and sweeping will not cause any damage to the cutting head. However, in this operation, the operator cannot clearly and accurately judge the distance between the cutting head and the bottom surface every time. When the cutting head touches the ground, it will cause varying degrees of damage to the rotating connection bearings and motor drive gears of the olecranon. Damage is also detrimental to the excavator arm and connecting shaft.
Having said so many prohibitions, what is the correct operation? The correct operation is to use the excavator to drive the olecranon to find the position and angle that needs to be cut, and then cut it. Try not to allow the olecranon to withstand additional external force, let alone the impact of the olecranon.

We all know that second-hand excavators often have many failures during work. For some easy failures, here are a few simple and convenient solutions for you:

In the construction operation of hydraulic excavators, according to the load request of the operation, the speed and load (flow and pressure) are inversely proportional, that is, the product of the output pressure and the flow of the pump is a constant, and the output power of the pump is constant or approximately constant; if If the pump control system is malfunctioning, the engine-pump-valve-load can't be optimized and matched in different working conditions, so that the excavator can't work normally.

When dealing with faults, the same goes from simple to complex, analyzing and confirming one by one. Generally start with the electrical system first, then check the hydraulic system, and finally check the mechanical transmission system. When checking the hydraulic system, check the components step by step from the help oil circuit-the control oil circuit-the main oil circuit-to master components.

Slow down

If it is a second-hand excavator that has been used for many years, the speed gradually slows down, which is caused by normal wear and tear. The wear and tear of important components and parts of the whole machine will cause the engine power to decrease and the hydraulic system to leak, so a series of failures are manifested.

Due to the internal energy consumption caused by the leakage, a large amount of heat energy is generated, which makes the entire system rapidly heat up, and the viscosity of hydraulic oil and engine oil decreases, which causes the entire system to generate high temperature. The parts that are out of wear and tear shall be repaired and replaced.

If it is a new excavator that suddenly slows down, it is necessary to simplify and then to check from the following aspects: first check whether the circuit fuse is open or short-circuited; whether the pilot pressure is normal; whether the servo control valve—servo piston is stuck; the distributor merges Failure, etc.; other possibilities are eliminated, and finally the hydraulic pump is disassembled.

Excavator weakness

The whole machine is unable to be divided into several aspects. One is that the engine speeds down sharply when the external load is large, which is expressed in the following two aspects:

1. First check to activate flexibility as mentioned above;

2. Check whether the hydraulic displacement complies with the constant power output. That is, adjust the angle of the swash plate to reduce the displacement without affecting the speed.

The second is that the engine does not slow down when the load is heavy, and the system speed is normal; this requires the adjustment of the system pressure. Because the hydraulic components and hydraulic systems used by various manufacturers are different, the pressure of each hydraulic cylinder is different, as long as it is specified by the manufacturer. Standard debugging is fine. In addition, if the pressure of the regulating relief valve cannot be adjusted and the relief valve is in good condition, it is necessary to check the adjustment system of the hydraulic pump, and even the cylinder block, valve plate, plunger and other parts of the hydraulic pump.

Summarize

Common failures of general excavators are expressed in the above aspects. With the increase in the application of excavators, some of the extensive faults that often appear in construction operations are generally understood by users who have used excavators for more than one or two years; for example, if the excavator is walking off-track, the user can immediately realize: walking The distribution oil seal (also known as the central rotary joint oil seal) is broken; the flow rates of the two hydraulic pumps are different; there is a problem with the moving motor. The hydraulic cylinder drains quickly: you can immediately realize that the safety relief valve is not tightly closed, or the cylinder oil seal is severely damaged, etc.

The hydraulic equipment in the hydraulic shears is composed of mechanical, hydraulic, electrical and other devices. Therefore, maintenance should be paid attention to in daily production to extend the life of the hydraulic shears and increase production capacity.

Generally, the failure of hydraulic shears is caused by a variety of factors. Therefore, when dealing with hydraulic failures, you must be able to understand the schematic diagram of the hydraulic system and have a general understanding of the role of each component in the schematic diagram. It is necessary to analyze and judge according to the failure phenomenon, and analyze the causes of the failures caused by many factors in order to better solve and eliminate them. In the hydraulic system, the working fluid flowing in the components and pipelines is difficult to see from the outside world, so it brings more difficulties to analysis and diagnosis, and maintenance personnel are required to have a strong ability to analyze and judge faults. Find out the cause and location of the fault in many complicated relationships between machinery, hydraulics, and electricity, and eliminate them in a timely and accurate manner.

Therefore, the operator of the hydraulic shearing machine is required to have the ability to simply analyze and judge the fault. In the production process of hydraulic shears, combining mechanical, hydraulic, electrical and many complex components, understand the reasons and locations of simple faults, and facilitate timely and accurate troubleshooting.

Provide excavator olecranon shears, hydraulic olecranon shears, excavator scrap shears, olecranon hydraulic shears, used for cutting scrap and industrial demolition. Provide excavator olecranon shears, hydraulic olecranon shears, excavator scrap shears, and olecranon hydraulics Shears, used for cutting scrap steel and industrial demolition. This is a new type of scrap steel shearing product, which is relatively strong in the market in terms of shearing force and strength. Olecranon scissors. A new generation of olecranon shears improves productivity by improving product strength, using German technology, imported sealing elements, and adopting special jaw sizes and special blade designs. Durable and easy to maintain

Penetrate complex structures with huge shearing force. Both fixed and mobile cutting mechanisms have high rigidity and better design structures

It is used for the disintegration of trucks and the dismantling of steel structure facilities such as nuclear power plants, steel and chemical plants.

The olecranon shears for excavators, also called olecranon hydraulic shears, belong to the accessories of excavators. It is suitable for scrap steel cutting, factory steel structure dismantling, scrap car dismantling, ship dismantling and other projects. It is characterized by convenient movement, flexible use in any occasion, high speed and high efficiency. It replaces the crocodile shearing machine, the gantry scrap steel shearing machine, and the shortcomings of the baling shearing machine that cannot be moved. Compared with manual cutting, the cost is reduced, the safety is improved, and it is more environmentally friendly.

Features

1) It can be rotated 360 degrees, which is more convenient to operate and save working hours.

2) The design of covering the heavy-duty pivot, the strong structure and long-term wear resistance, the service life is prolonged.

3) The blade can be easily replaced without grinding and welding, just remove the screw to replace the blade.

4) The blade can be easily replaced without grinding and welding, the blade can be replaced by simply removing the screw.

Hydraulic shears usually have an aluminum alloy shell. Its blade is forged from hot-rolled steel. Pistons and piston push rods are usually made of hot-rolled alloy steel. Let’s explore the working principles of hydraulic shears.

Hydraulic shears are mainly used to cut materials such as sheet metal and plastic. Usually, they are used to cut cars and other vehicles to rescue trapped passengers. Like hydraulic expanders, hydraulic shears can also be driven by gasoline. The device provides power, and the life-saving jaw system can be driven by electricity, air or hydraulic pressure.

Different from the hydraulic expander, the hydraulic shear is a curved claw-like extension, and its end is pointed. The principle of the hydraulic expander is the same. After the hydraulic fluid flows into the hydraulic cylinder, the pressure is applied to the piston. The opening and closing of the blade depends on the The direction of the power on the piston. When the piston push rod rises, the blade opens. When the piston push rod descends, the blade begins to close to the object, such as the roof of the car, and cut it open.

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