Rubber-plastic seal ring with section seam, bonding method of section seam and vulcanization bonding die for section seam

Abstract

The invention discloses a rubber seal ring with a section seam. The rubber sealing ring comprises an annular seal ring substrate, the inclined section seam is arranged on the seal ring substrate, the seal ring substrate is cut off by the section seam, and the section inclination angle beta of the section seam is equal to 35 degrees-55 degrees. The bonding steps of the section seam are as follows: roughening, cleaning and air-drying the section seam; uniformly distributing heat vulcanization bonding agent on the section and drying; butting bevel end surfaces, then placing into a preheated vulcanization bonding die and exerting pressure on the two bevel end surfaces so as to enable the two opposite bevel end surfaces to be close to each other; heating and keeping for a certain period of time; and naturally cooling down to room temperature and then removing the die. The vulcanization bonding die for the section seam at least comprises an upper die plate and a lower die plate, wherein the upper die plate and the lower die plate are connected through an axial pressurization screw rod, a rubber seal ring cavity is formed between the upper die plate and the lower die plate which are mutually jointed, electric heaters and temperature measuring devices are arranged on the upper die plate and the lower die plate, and the temperature measuring devices are mutually electrically connected with a temperature controller.

Description

technical field [0001] The invention relates to a contact type rubber and plastic sealing ring used in a shafting sealing device of a ship. The sealing ring can be directly sleeved on the rotating shaft from the radial direction through the cut opening to implement sealing. The invention also relates to the on-site bonding method of the sealing ring cutting seam and the special vulcanization bonding device for the method. Background technique [0002] Rubber and plastic sealing rings are the most common and commonly used seals in elastic-plastic body contact dynamic seals. They are widely used in sealing devices for various shafting components. Usually, whether it is a rubber O-ring or a lip-shaped sealing ring, it adopts an integral ring structure. When the sealing ring is replaced and maintained, the rotating parts or related parts on the rotating shaft are always disassembled first, and then removed from the shaft end. It is troublesome to disassemble or install, but it...

AI Technical Summary

Problems solved by technology

However, the stern shaft sealing device not only has many related parts and complex structure, but also the size and weight of the parts and the high linear speed of the sealing surface make the sealing ring a vulnerable part in the stern shaft sealing device

In order to ensure the reliable sealing performance of the sealing device, the sealing ring must be replaced in time when it has been used for a certain period of time or damaged. When replacing the sealing ring with this integral ring structure, the propellers in the cabin must be removed in turn after the ship docks. It is even necessary to pull out the stern shaft, replace the sealing ring, and then install the stern shaft, propeller and stern rudder. Maintenance and replacement are very troublesome, and the maintenance period is long and the cost is high.

Although there are also split stern shaft sealing devices, such as a "split oil lubricated stern shaft sealing device" disclosed in Chinese patent 2006200744172.4, the relevant parts and sealing rings of this sealing device are completely split The two-piece structure not only increases the mechanical connection structure of the parts, but also increases the maintenance cost, and the sealing ring has two straight cut slits. The cross-sectional area of ​​the sealing ring is small, and the bonding strength after curing is not high. Affect the integrity, service life and sealing performance of the sealing ring

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