Dynamic sealing device having cooling function for high-power and high-speed submerged motor

Abstract

The invention relates to a dynamic sealing device having a cooling function for a high-power and high-speed submerged motor, which comprises a stator [1] and a rotating shaft [10]. A shaft sleeve [8] is fixed on the rotating shaft [10]; a sealing seat [3] is sealed with the shaft sleeve [8]; a sealing gland [5] presses a reinforced seal [6] in a recess of the sealing seat [3]; a seal ring III [9] is arranged between the shaft sleeve [8] and the rotating shaft [10]; the shaft sleeve [8] has a self-circulation cooling structure; the shaft sleeve [8] is provided with a cooling water inlet [12] and a cooling water outlet [13]; a blade [14] is vertically arranged in the shaft sleeve [8]; the sealing seat [3] is fixed on an end cap [11]; and the end cap [11] is fixed on the stator [1]. The device has high sealing performance by combining a shaft seal with the reinforced seal; and the self-circulation cooling structure of the shaft sleeve solves the problem that the shaft sleeve and a bearing have a high temperature due to the high speed revolution of the submerged motor, so that the safe, reliable and long-term operation of the submerged motor are ensured.

Description

technical field [0001] The invention relates to a dynamic sealing device of a motor, in particular to a dynamic sealing device of a high-power and high-speed submersible motor. Background technique [0002] With the expansion of ocean development and port engineering, my country's port construction, river dredging, land reclamation and other projects require a large number of large-scale engineering ships for construction. Among them, underwater reamers and mud pumps must use high-power and high-speed submersible motors. The dredger driven by the submersible motor is energy-saving and environmentally friendly, has a large digging force, is convenient for speed regulation, and can also cope with harsh working conditions. Since the submersible motor operates at 20 to 30 meters underwater, reliable sealing is the prerequisite for the normal operation of the motor; the existing dynamic seal for submersible motors is suitable for low-power submersible motors, and if it is used fo...

AI Technical Summary

Problems solved by technology

Since the submersible motor operates at 20 to 30 meters underwater, reliable sealing is the prerequisite for the normal operation of the motor; the existing dynamic seal for submersible motors is suitable for low-power submersible motors, and if it is used for high-power and high-speed submersible motors, then Because the diameter of the shaft is large, the speed is high, and the contact line speed between the oil seal and the shaft sleeve is high, it will cause the shaft sleeve to heat up, causing leakage and damage to the submersible motor

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