Analysis of the composition of a vacuum furnace system

Vacuum furnaces generally use rotary vane mechanical pumps, Rolls-Roy pumps or even oil diffusion pumps or ion pumps to form a vacuum system, while SLV furnaces only use water-ring vacuum pumps. The principle is similar to common water pumps. The vacuum degree is about 104Pa, which is much lower than that of high vacuum. furnace. However, the ingenious process of evacuation and the associated simple control device can greatly reduce the oxygen concentration in the furnace.

Precautions for using high-temperature and low-vacuum furnaces In order to ensure the normal operation of the furnace and extend the maintenance cycle as much as possible, special attention should be paid to the following points: (1) The supply of water for cooling water and water ring vacuum pumps must be guaranteed at all times. Recirculating pools save water. At present, the vacuum degree of each plant is still increased by vacuum pumps.

(2) Always check the contact between the furnace cover and the interface of the furnace boss to ensure a high degree of smoothness and smoothness. When the furnace temperature changes, the Roots water ring vacuum unit or the work piece collides with and impacts, so that the quality of the contact surface is reduced, and even when the deflection is deformed, it is necessary to perform maintenance in time.

(3) Each time the furnace is installed, it is necessary to carefully observe the quality condition of the lid seal rubber ring, and rigidly provide regular (about 3 months) with a new apron with good quality.

(4) When the furnace is repaired, replace the sealing rubber ring of the double door lifting mechanism, terminal and thermocouple insertion hole with vacuum grease, check whether the cooling water jacket is working properly, water ring vacuum pump and its Electric contact pressure gauges, changeover switches, etc. are also routinely inspected and maintained. Low vacuum heat treatment furnace has good sealing performance and uses vacuum circulation and other measures to solve this problem.

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