Some questions on the hydraulic system maintenance and use of attention: 1. To prevent the pollution of hydraulic oil Hydraulic oil pollution refers to the mixing of air, moisture and various cured products from the outside, such as the use of mixed with rust metal powder, it destroyed Sealing materials, paint and other debris. Oil pollution will exacerbate the hydraulic components of the relative movement between the wear and tear, resulting in the throttle orifice blockage or spool movement amplitude stuck, so that the hydraulic components can not work properly. According to statistics, more than 75% of hydraulic system failure is due to oil pollution. Therefore, various measures must be taken to prevent or reduce the oil pollution. The main methods to prevent oil pollution are: ①Before the installation of pipes, castings, etc. to be thoroughly cleaned, the hydraulic system to complete the assembly should be thoroughly cleaned; ② All kinds of hydraulic components assembly, prohibit the use of fabrics with fibers (such as cotton ) Wipe; ③ tank should be properly sealed, through the atmosphere at the air filter should be set; ④ seal must be reliable, prohibit the use of oil-resistant seals and hoses; ⑤ rational use of filter type and installation location. The system should be configured according to the needs of coarse, fine filter. Oil filters should always check the use of the situation and found that damage should be promptly replaced; ⑥ regular replacement of oil, usually more than 10,000 hours of accumulated work, it should be oil change. If continued to use, the oil will lose its lubricating properties and may show acidity, causing corrosion of the metal parts of the hydraulic system. If intermittent use, according to the specific circumstances every six months or a year oil change time. 2. To prevent air from entering the hydraulic system Hydraulic system used in the oil compressibility is very small, in general, can be considered oil is incompressible. But the compressibility of the air is very large, about ten thousand times the oil, so even if the system contains a small amount of air, its impact is great, the air dissolved in the oil at low pressure will be from the oil The liquid escapes, creating bubbles, creating cavitation. In the high pressure zone, these bubbles break down quickly under the pressure of oil and are rapidly compressed to produce noise in the system and to be released when the gas is suddenly compressed A lot of heat, causing local overheating, speed up the oil temperature, the hydraulic components and hydraulic oil damaged. Compressibility of the air, but also lead to crawling and other organs of failure, undermining the stability of the work, and sometimes produce vibration. To prevent air from entering the hydraulic system are: ①suction pipe and return pipe should be inserted below the oil surface, and maintain a sufficient depth; ② the system should be kept full of oil in all parts, the method is to install a one-way Set the back pressure valve on the valve and the oil return line; ③ the oil level of the fuel tank should be as large as possible, and the space between the suction side and the oil return side should be separated by a partition to achieve the purpose of eliminating air bubbles; Set the vent, the air should be released when starting; ⑤ should maintain a good seal fittings, especially the suction pipe, if the seal is not good, the air will be sucked into the hydraulic system. 3. To prevent the oil temperature is too high Construction machinery hydraulic system oil temperature is generally 30 degrees to 80 degrees better range, the oil temperature is too high on the system will have a series of adverse effects, such as viscosity, leakage increases, the volume The decrease of efficiency leads to instability of the hydrodynamic speed, which will result in the change of the clearance between the different thermal expansion coefficients, even stuck, which will deteriorate the oil, deteriorate the seal and lose the sealing performance. The reasons for the oil temperature rise varied, such as the tank volume is too small, the cooling area is not enough, the fuel tank storage capacity is too small, the ambient temperature is high, the cooler malfunction; system does not uninstall the circuit, stop working when the pump is still In the high-pressure overflow; tubing too thin too long, too much bending, pressure loss is too large, the components of the machining accuracy is not high, the relative movement of the friction heat too much. From the maintenance point of view, should pay attention to the following questions: ①often maintain the correct level of oil in the tank, so that oil has enough circulating cooling oil; ② often keep the cooler enough water, the pipeline flow; ③ in The system does not work, the pump must be unloaded; ④ the correct choice of oil viscosity. 4. To strengthen the daily inspection of hydraulic systems and periodic inspection hydraulic system of some major faults, often in advance there will be some small anomalies, through routine maintenance and inspection will be early detection, early prevention, and early troubleshooting. ①Check before starting the pump, pay attention to the fuel tank before the start of the pump is full of oil, the fuel must be added to the upper limit indicator, with a thermometer to measure the oil temperature, when the oil temperature is below 10 degrees, the system should be in no-load state Run for more than 20 minutes. ② pump start and start after the inspection, with the method of stopping on the open start, repeat several times to make the oil temperature rise, flexible hydraulic device operation, and then into normal operation. At the same time pay attention to the pump noise, if the noise is too large, we must check the reasons for exclusion before normal work. ③ system work in the inspection, the system is stable, we must always pay attention to the oil, oil temperature, pressure, noise, hydraulic cylinder, motor, reversing valve, relief valve work, pay attention to the entire system of oil leakage and vibration. ④ After the system is used for a period of time, such as abnormal phenomenon, if the method of external adjustment can not be ruled out, can be decomposed to repair or replacement parts. Complex hydraulic components should be very careful decomposition, the best professional manufacturers to repair.
Pu Panel
Pu panel can be customized to process different sizes
There are many different thicknesses of pu panel. The maximum single piece can be 13.8 meters X 3.6 meters, and the thickness is 105mm, 75mm, 65mm, 55mm, 45mm, 25mm. Now many buildings need to use this kind of Sandwich Panel. Its moisture-proof and heat-insulating effect is very good, it is practical, and the price is favorable and can be used for a long time. It is often used in cold storage insulation wall panels and building and other building wall panels. Cost-effective The aspect is also good. And now all manufacturers can provide customized processing services, and customized sandwich panels are also guaranteed.
Product Features Introduction
Pu sandwich panels are generally connected by dark nails, the surface rendering effect is good, and it can also ensure the tightness of the construction and long-term service life. Moreover, it has a unique waterproof groove design, which can effectively prevent rainwater from penetrating, and can also avoid the occurrence of cold bridges, which is very suitable for use as roofing materials. Moreover, its sandwich panel has a strong load-bearing capacity, which effectively ensures the thermal insulation and sound insulation effects of the building, and at the same time can reduce the overall construction cost, and the cost performance is also guaranteed.
Factory customization for you
If you need to order pu panel and Eps Sandwich Panel in batches, you can directly contact the manufacturer for custom processing. While enjoying the price known by the manufacturer, the manufacturer can also provide us with good after-sales service. Different sizes and specifications can be selected, and some design styles can be requested. Such sandwich panels are convenient to use later. Moreover, the manufacturers will directly provide the corresponding screw links, which can ensure the stability of the links and also speed up the construction speed in the later stage.
There are many different thicknesses of pu sandwich panel. The maximum single piece can be 13.8 meters X 3.6 meters, and the thickness is 105mm, 75mm, 65mm, 55mm, 45mm, 25mm. Now many buildings need to use this kind of sandwich panel. Its moisture-proof and heat-insulating effect is very good, it is practical, and the price is favorable and can be used for a long time. It is often used in cold storage insulation wall panels and building and other building wall panels. Cost-effective The aspect is also good. And now all manufacturers can provide customized processing services, and customized sandwich panels are also guaranteed.
Product Features Introduction
Pu sandwich panels are generally connected by dark nails, the surface rendering effect is good, and it can also ensure the tightness of the construction and long-term service life. Moreover, it has a unique waterproof groove design, which can effectively prevent rainwater from penetrating, and can also avoid the occurrence of cold bridges, which is very suitable for use as roofing materials. Moreover, its sandwich panel has a strong load-bearing capacity, which effectively ensures the thermal insulation and sound insulation effects of the building, and at the same time can reduce the overall construction cost, and the cost performance is also guaranteed.
Factory customization for you
If you need to order pu sandwich panels and eps sandwich panel in batches, you can directly contact the manufacturer for custom processing. While enjoying the price known by the manufacturer, the manufacturer can also provide us with good after-sales service. Different sizes and specifications can be selected, and some design styles can be requested. Such sandwich panels are convenient to use later. Moreover, the manufacturers will directly provide the corresponding screw links, which can ensure the stability of the links and also speed up the construction speed in the later stage.
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Henan Jinming Metal Material Co., Ltd. , https://www.hnjmmetal.com