Characteristics of piston rings with different shapes

1. Rectangular ring: the cross section of the rectangular ring is rectangular. It has simple shape, convenient processing, large contact area with cylinder wall, and is beneficial to heat dissipation of piston. However, the running-in performance is poor, and the pump oil function is strong, which increases the oil consumption and causes serious carbon deposit on the piston top and combustion chamber. Now this kind of piston ring is rarely used. 2. Conical ring: the outer circular surface of the conical ring is a conical surface with a small cone angle (The cone angle is generally 30 ′~ 60 ′). The conical ring is in line contact with the cylinder wall, which has good running-in property and increases the contact pressure and adaptability to the shape of the cylinder wall; However, with the increase of running-in degree, the contact surface gradually becomes larger and finally becomes a common rectangular ring. In addition, the conical ring can play a role of scraping oil downward when the piston goes downward, and has a role of distributing oil when the piston goes upward, which can form a wedge-shaped oil film to improve lubrication. However, the conical ring has poor heat transfer, so there is no need to make the first air ring. Because the cone angle is very small, it is generally not easy to identify. In order to avoid wrong installation, the upper side of the ring is marked with an upward mark (TOP). 3. Twisted ring: The twisted ring is a part of the inner circle or outer circle edge of the rectangular ring, so that the section is asymmetrical. Such a piston ring is called a twisted ring. If the inner circular part of the ring is notched or chamfered is called the inner circular ring, the outer circular part of the ring is notched or chamfered is called the outer circular ring. If a part of the upper edge of the inner circular surface or the lower edge of the outer circular surface is cut off, the whole air ring will be twisted into a dish shape, which is called a positive twisted ring; If a part of the lower edge of the inner circular surface is cut off, the Air ring will be twisted into a cover shape, which is called an anti-twist ring. Do you know the piston ring, the part with the highest engine technology? After the twisted ring is loaded into the cylinder, the piston ring is twisted and deformed due to the unbalanced force caused by the asymmetrical section. It has the characteristics of a conical ring, which has the function of distributing oil when the piston is ascending, and can form a wedge-shaped oil film to improve lubrication; When the piston goes down, it has an oil scraping effect to avoid oil burning. At the same time, due to the shortened stroke of the upper and lower runout of the twisted ring in the ring groove, the side effects of' pump oil' can be reduced, the impact force can be reduced, and the wear and tear can be reduced; The power stroke ring is no longer twisted, and the two sealing surfaces reach complete contact, which is beneficial to heat dissipation. Because the twisted ring has many advantages, it is widely used at present. When installing, the shape and direction of the section must be paid attention to: the inner upper twisted ring is loaded into the first ring groove, and the inner cut is upwards; The outer cut twist ring is loaded into the second and third ring grooves with the outer cut facing down. Must not be reversed, otherwise the engine oil consumption will increase sharply.

Nowadays, the adoption of custom piston rings in auto diesel piston ring company industry is quite common.

GUANGZHOU HEARTEN AUTO PARTS CO,LTD. didn’t receive any negative feedback from our customers before, which proves that customers have faith in us.

There are ample scientific evidence of reducing the risk of standard piston ring company.