In order to ensure that the compressor is in a good state of operation and extend the service life of the machine, maintenance must be performed. Through maintenance, you can fully grasp the status of the machine, you can find problems in a timely manner, troubleshooting, improve the working conditions of the machine, even if you view the fault, but also easy to judge and take measures. Next Xiaobian introduced the features of the piston compressor and the routine maintenance of the piston compressor.
Piston compressor features
1. The applicable pressure range is wide, and the required pressure can be achieved regardless of the flow rate;
2, high thermal efficiency, unit power consumption;
3, strong adaptability, that is, a wider range of exhaust, and not affected by the pressure level, can adapt to a wider range of pressure and cooling capacity requirements;
4, maintainability;
5, low material requirements, more common steel materials, processing easier, the cost is lower;
6. It is relatively mature in technology and has accumulated rich experience in production and use;
7, the device system is relatively simple;
Daily maintenance of piston compressor
1. Always look at the indicating instruments, such as pressure gauges, oil pressure gauges, thermometers, oil temperature gauges, etc., and pay attention to the lubrication conditions, such as the oiler, the fuel tank, and the lubrication points, and the flow of cooling water.
2, listen to the sound of machine operation. Such as air valve, piston, crosshead, crankshaft and bearings and other parts of the sound is normal.
3. Diligently touch various parts to detect the temperature change and vibration of the compressor. Such as cooling the drainage temperature, oil temperature, operating temperature and vibration conditions, etc., and thus early detection of abnormal temperature rise and mechanical fastening. But pay attention to safety.
4. Diligently check the working condition of the entire machine and equipment, and handle the problem in time.
5, fill in the machine operation record form earnestly and responsibly.
6. Conscientiously do a good job in the safety and health of the engine room, keep the compressor clean, and do a good job in the handover work.
Piston compressor working principle
1, the compression process
The piston moves upward from the bottom dead center, the suction and exhaust valves are closed, and the gas is compressed in the closed cylinder. As the cylinder volume is gradually reduced, the pressure and temperature gradually increase until the gas pressure in the cylinder is equal to the exhaust pressure. The compression process is generally viewed as an isentropic process.
2, the exhaust process
As the piston continues to move upwards, causing the gas pressure in the cylinder to exceed the discharge pressure, the exhaust valve opens and the gas in the cylinder is forced out of the cylinder by the piston to enter the exhaust pipe until the piston moves to top dead center. At this point, due to the exhaust valve spring force and the gravity of the valve plate itself, the exhaust valve closes the exhaust.
At this point, the compressor completes a working cycle consisting of three processes of suction, compression, and exhaust. After this, the piston moves downward again, repeating the above three processes, so that the cycle is repeated. This is the ideal working process and principle of a piston refrigeration compressor.
Editor's summary: The characteristics of the piston compressor and the daily maintenance of the piston compressor are introduced here, and we hope to help everyone. If you want to know more related information, you can pay attention to this website information.
Refrigeration Compressor Piston Compressor
Natural Graphite , as its name implies, is naturally formed by natural Graphite , which is generally found in graphite schist, graphite-gneiss, graphite-bearing schist and metamorphic shale.
Features
The chemical composition of graphite is carbon (C). Naturally produced graphite is rarely pure and often contains impurities, including SiO2, Al2O3, MgO, CaO, P2O5, CuO, V2O5, H2O, S, FeO and H, N, CO2, CH4, NH3, etc. Natural graphite minerals are black, steel gray, striated black; Metallic luster, crypto, dull, opaque; The hardness is isotropic, the vertical cleavage surface is 3 ~ 5, the parallel cleavage surface is 1 ~ 2; Qualitative soft, density is 2.09 ~ 2.23 g/cm3, have the feeling of greasy, easy to contaminate finger. Mineral chip under the transmitted light is generally not transparent, extremely thin can pervious to light, the light green gray, refractive index of 1.93 ~ 2.07, under the reflected light is light gray, reflective pleochroism, Ro gray with brown, Re dark blue gray, reflectivity Ro23 (red), Re5.5 (red), the reflected color, double reflection were significantly, strong heterogeneity, polarization color for straw yellow.
Graphite is a complex six-party double cone, assumes the six-party tabular crystal, common simplex are parallel double, six-party double cone, hexagonal prism, but in good condition with rare crystal forms, the generally show scaly or platy, aggregate density lump, earthy or globular.
Type
The process performance and usage of graphite is mainly depends on the degree of crystallization, in accordance with its natural Graphite Crystal morphology can be divided into crystalline graphite, Flake Graphite ) and aphanitic graphite (earthy graphite) two types of industry.
Crystalline graphite
In the crystalline (scale) graphite ore, the diameter of graphite crystals is greater than 1 mu m. Ore grade is low, but optional; The mineral associated with graphite is usually mica, feldspar, quartz, diopathic stone, diabase, garnet and a small amount of pyrite, calcite, etc., some of which have some useful components, such as rutile and vanadium. The ore is scales, grainy scales or granulocyte structures, flaky, flaky, or blocky structures.
Crystalline (scale) graphite is divided into High Purity Graphite, High Carbon Graphite, Medium Carbon Graphite and low Carbon Graphite according to the fixed carbon content.
The high purity graphite (fixed carbon content is greater than or equal to 99.9%) is mainly used for flexible graphite sealing material, nuclear graphite, instead of platinum crucible for chemical reagent melting and lubricant base material, etc.
High carbon graphite (fixed carbon content 94.0% ~ 99.9%) is mainly used for refractory materials, lubricant substrate, brush raw materials, carbon products, battery raw materials, pencil materials, filling materials and coatings, etc.
Carbon graphite (80% ~ 94% fixed carbon content) is mainly used for crucible, refractories, casting materials, foundry coatings, pencil raw materials, battery materials and dyes, etc.
Low carbon graphite (fixed carbon content 50.0% ~ 80.0%) is mainly used for foundry coatings.
Cryptocrystalline graphite
Cryptocrystalline graphite is also called soil graphite or amorphous graphite. In cryptocrystalline graphite ore, graphite crystals are less than 1 mu m in diameter, which are microcrystalline and can only be seen in the electron microscope. High grade of ore, but poor selectable; The mineral associated with graphite is often quartz and calcite; The ore is microscaly - cryptocrystalline structure, block or soil structure.
Cryptocrystalline graphite ore is mainly distributed in contact metamorphic deposits. Actually the diameter graphite flake graphite ore is uneven, the so-called crystalline graphite ore, may also contain the aphanitic graphite, are too many content is often referred to as the mixed type graphite ore, may also contain a small amount of aphanitic graphite quality mineral crystalline flake graphite piece diameter slightly larger than 1 microns.
Cryptocrystalline graphite ore is mainly used in pencil, battery, electrode, graphite emulsion, graphite bearing ingredients and the raw materials of battery carbon rod. The non-ferrous graphite is mainly used for casting materials, refractory materials, dyes and electrode paste.
Natural Graphite
Natural Graphite,Expanded Graphite,Colloidal Graphite,Special Graphite
Fengcheng Ruixing Carbon Products Co., Ltd , http://www.lnfcrxts.com