-
1. Cylinder wear and failure phenomenon.
There is a noticeable clicking knocking sound during the cold start, and the temperature increases, and the sound is weakened or disappears.
The cylinder pressure is low. Sometimes blue smoke is emitted from the exhaust pipe, and blue smoke is emitted from the oil port.
Reduced engine dynamics.
Increased fuel consumption. Fault diagnosis and elimination of cylinder wear.
Second, the wear law of the cylinder and its causes.
1) Cylinder wear law.
From the longitudinal section of the cylinder (along the axis of the cylinder): irregular "cone" or "cone" with large upper and lower size. Wear the most areas:
When the piston is located at the top dead center, the cylinder wall corresponding to the first piston ring, the upper mouth that the piston ring cannot touch is not worn, forming a "cylinder step". In special cases, the greatest wear of the cylinder is in the middle (waist drum shape). On the same engine, the wear of different cylinders is not the same, and the wear of the front wall of the first cylinder and the rear wall of the last cylinder of the water-cooled engine is more serious.
From the cylinder cross-section: uneven wear, worn into an irregular oval. The maximum wear part of each cylinder along the circumferential direction: generally the most wear of the cylinder wall near the opposite side of the intake valve.
2) Causes of cylinder wear.
Under normal conditions, the wear of the cylinder along the working surface in the piston ring movement area is an irregular cone with a large top and a small bottom along the height direction. The largest part of wear is the cylinder wall corresponding to the first piston ring when the piston is in the top dead center position. However, the upper mouth of the piston ring, which is not in contact with the cylinder wall, is almost not worn, resulting in a noticeable cylinder shoulder.
The reasons why the top is big and the bottom is small:
Mechanical wear: When the piston is located at the top dead center, the high-temperature gas burst pressure is the largest, resulting in the positive pressure of the piston ring on the cylinder wall increases, the friction also increases, the lubricating oil film is destroyed, and the cylinder wall wear corresponding to the first piston ring is the most serious.
Corrosion wear: organic acids and acidic oxides (dissolved in water to form mineral acids) from the combustion of gas mixtures. It has a corrosive effect on the surface of the cylinder, resulting in corrosion and wear. The upper part of the cylinder block cannot be completely covered by the lubricating oil film, and the corrosion effect is more serious.
Abrasive wear: Dust in the air, mechanical impurities in the lubricating oil, and abrasive debris in the engine enter the cylinder walls to cause abrasive wear. The dust in the air is sucked into the upper part of the cylinder, which has sharp edges and corners, so the upper part of the cylinder is also the most worn.
The reason for the waist drum shape: in areas with severe wind and sand, after a large amount of dust enters the cylinder, the abrasive wear is the most serious due to the maximum movement speed of the piston in the middle of the cylinder.
3. Cylinder wear fault diagnosis method.
Detection of faulty cylinder pressure.
Inspect cylinder diameter and cylindricity.
-
SC is the standard double-acting type, 100 is the bore of the cylinder, 500 is the stroke of the cylinder, and the length is 100 mm.
SC standard cylinders are suitable for use in a variety of different industries and are specifically used in dust removal devices. These cylinders are usually equipped with a lift valve as well as an electromagnetic pulse.
valves are used together.
Advantages of SC cylinder use and cylinder seals, cylinder seals have a variety of sealing pistons can be O-rings, Y-rings, L-rings and a small Y-ring, etc., these SC cylinder seal rings and the advantages of use are described below. O-rings.
Reliable sealing, simple structure, small volume of friction resistance. After installation, the O-ring is greater than or less than or the outer diameter than the inner diameter of the sealing surface. <>
l The reliability of the annular seal, the long life, and the frictional resistance greater than the O-ring. Generally, it is used for SC cylinders with diameters greater than mm. When assembling high, the screws should not be tightened too tightly to avoid deformation and damage to the sealing performance.
Y-rings are reliably sealed, often have a long life, and have greater frictional resistance than O-rings. It is generally used for cylinders with diameters greater than mm.
The small Y-shaped cylinder has high uniform force cylinder SC cylinder wear resistance, oil resistance, high-strength ring, and good elasticity. Its service life is several times higher than that of rubber sealing oil. Friction than O-type and Y-shaped.
Smaller. Simple piston structure, cross-sectional aspect ratio of Qi Li Tong sealing ring.
Greater than. The ring does not roll down when in use, has good self-sealing, and will not leak under low pressure.
-
Summary. How many times does SC100*200 cylinder 10L gas volume work, hello, cylinder life depends on the stroke, the stroke is large according to the kilometer (100,000 kilometers of festo), and the stroke is small according to the number of actions (10 million times of festo) cylinder volume refers to the volume of the piston from the top dead center to the bottom dead center. The calculation is as follows:
Cylinder volume vh=*d*d*s 4, where d is the cylinder diameter and s is the piston stroke. The volume and displacement of the cylinder are not the same. Displacement refers to the volume swept by the piston in reciprocating motion, i.e., the effective volume, whereas cylinder volume refers to the total volume of the cylinder.
The volume of the cylinder is greater than the displacement volume. We know that cars work by burning fuel. The fuel is first compressed in the cylinder and then burned to expand instantaneously to provide power.
Generally, the compression ratio of a car is about 10:1, which can be understood in this way: here 10 is the cylinder volume, 1 is the invalid volume, and the difference between the two is 9 is the displacement.
If we compress the fuel to zero volume, the volume is equal to the displacement, this is impossible. I hope my answer is helpful to you, and finally I wish you good health and a happy mood again! <>
How many times does SC100*200 cylinder work with 10L gas volume.
Good. How many times does SC100*200 cylinder 10L gas volume work, hello, cylinder life depends on the stroke, the stroke is large according to the kilometer (100,000 kilometers of festo), and the stroke is small according to the number of actions (10 million times of festo) cylinder volume refers to the volume of the piston from the top dead center to the bottom dead center. The calculation is as follows:
Cylinder volume vh=*d*d*s 4, where d is the cylinder diameter and s is the piston stroke. The volume and displacement of the cylinder are not the same. Displacement refers to the volume swept by the piston in reciprocating motion, i.e., the effective volume, whereas cylinder volume refers to the total volume of the cylinder.
The volume of the cylinder is greater than the volume of the exhaust air. We know that cars work by burning fuel. The fuel is first compressed in the cylinder and then burned to expand instantaneously to provide power.
Generally, the compression ratio of a car is about 10:1, which can be understood in this way: here 10 is the cylinder volume, 1 is the invalid volume, and the difference between the two is 9 is the displacement.
If we compress fuel to zero volume, where volume equals displacement, this is impossible. I hope my answer is helpful to you, and I wish you good health and a happy mood! <>
SC Fishing Information [Chinese Edition.
Sky Trail SC Fishing Data [Noun Correction Version.] >>>More
1.Your configuration will be very stuck playing SC2.
2.It is recommended that you change two 2G memory,A total of 4G,SC eats memory very much,My 2G reading disk is very slow,Friends 4G are more blocks。 >>>More
freehand
English] [fri:h nd][American] [fri h nd]adj& n. >>>More
Composite soundboard. As far as domestic pianos are concerned, the technical content of Hailun piano is the highest, if you consider the comparison of domestic piano brands, Hailun piano should be the most competitive relative to Pearl River piano. Hailun piano has reached the world's leading position in the technology of aluminum alloy middle plate, which is characterized by ensuring the smooth operation of the keyboard series, and will not be deformed for a long time, and will not cause irreparable obstacles due to humidity. >>>More
Once the article is written, it is very important to choose a suitable journal for the article, just like choosing a good in-law for your daughter. For an article to be published successfully, you must first find a suitable journal; Second, the reviewer must be satisfied with the article. >>>More