ZL40 loader with dual-pipe gas push oil disc brake system (see Figure 1). Four brake cylinders are mounted on the disc brake 7 and are mounted opposite each other. When the brake pedal is depressed, the high-pressure gas from the air compressor 1 pushes the gas piston of the gas-liquid master cylinder 4 and the gas piston pushes the oil piston. Brake fluid through the tubing into the brake disc brake cylinder piston chamber and push the piston out; piston driven friction plate brake disc, the wheel brake.
Resulting in disc brake brake cylinder can not be returned there are four possibilities: First, foot brake valve 5 exhaust port blocked, the high-pressure gas into the atmosphere of the human body, resulting in gas-liquid master cylinder spring can not be returned, resulting in Brake oil disc brake brake cylinder piston top dead can not return; Second is the gas-liquid master cylinder to the disc brake tubing blockage, resulting in brake cylinder piston can not return; third is the gas-liquid master cylinder Of the spring itself can not be back, the brake fluid under the action of high pressure gas, can not return to the gas-liquid master cylinder oil storage chamber, resulting in the brake cylinder piston can not be returned; Fourth, disc brake brake cylinder piston Brake fluid too dirty or rusty piston stuck and can not return.
Judgment of failure, first depresses the foot brake valve, release the pedal after hearing the exhaust sound, thus ruining the first possibility. Then, unscrew the gas-liquid master cylinder to the disc brake brake cylinder pipe fittings, foot brake valve several times and found that there is brake fluid at the junction of the spray, and a greater pressure, which ruled out The second and third possibilities. Finally, we judge the fault in the brake cylinder.
The troubleshooting method is to remove the disc brake clamp 1 (see Figure 2), remove the friction plate 4 and the dust seal 3, and reconnect the tubing connector. We hope that under the high pressure of the brake fluid, the piston But a few times in the case of high pressure foot brake valve did not succeed, the sub-pump piston 5 can neither return nor eject, was completely stuck. Then, we removed the clamp cylinder head 6 and pushed the piston of the minute cylinder out. Then, it was cleaned with diesel and polished with 0 # sandpaper for further cleaning, and a new rectangular seal 2 was replaced. Reassemble and then test machine, the fault has been ruled out.
Tungsten carbide welding bars are commonly used in the oil and gas industry for various applications. These bars are made from a combination of tungsten and carbon, which results in a very hard and wear-resistant material. Here are some specific uses of tungsten carbide welding bars in the oil and gas industry:
1. Hardfacing: Tungsten carbide welding bars are used for hardfacing applications, where a wear-resistant layer is applied to drilling tools, valves, pumps, and other equipment exposed to abrasive environments. This helps to extend the lifespan of the components and reduce maintenance costs.
2. Drill bits: Tungsten carbide welding bars are used to manufacture drill bits for oil and gas exploration. The hard and durable nature of tungsten carbide makes it ideal for drilling through tough rock formations.
3. Wear plates and liners: Tungsten carbide welding bars are used to create wear plates and liners for equipment used in oil and gas production. These plates and liners protect the underlying metal surfaces from abrasion and corrosion, ensuring the longevity of the equipment.
4. Valve seats and seals: Tungsten carbide welding bars are used to manufacture valve seats and seals for oil and gas valves. The high hardness and wear resistance of tungsten carbide ensure reliable sealing and prevent leakage in critical applications.
5. Downhole tools: Tungsten carbide welding bars are used in the manufacturing of downhole tools such as stabilizers, reamers, and drill collars. These tools are subjected to high pressures, temperatures, and abrasive conditions, and tungsten carbide helps to enhance their durability and performance.
Overall, tungsten carbide welding bars play a crucial role in the oil and gas industry by providing wear resistance, hardness, and durability to various components and equipment.
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