SHAFT SEAL FOR AN OPEN-DRIVE COMPRESSOR

摘要

Devices and methods for maintaining lubrication of a shaft seal of an open-drive compressor that is operating in a vacuum condition. The external side of the shaft seal allows retention of a volume of lubricant for extending the lifespan of the shaft seal for the open-drive compressor. The devices can also reduce and/or prevent deterioration of the shaft seal regardless of the operation condition of the open-drive compressor. The devices can further reduce and/or prevent leakage of a lubricant and/or refrigerant that can cause deterioration of components within a transport refrigeration unit (TRU).

主权项

1. A seal cover assembly for a compressor of a refrigeration unit, comprising:
a seal cover configured to separate a suction side of a shaft seal from an external side cavity of the shaft seal and configured to maintain a volume of lubricant within the seal cover during a vacuum condition; and a drain tube connected to the external side cavity, wherein the drain tube includes a check valve for slowing a flow of the lubricant out of the external side cavity when in a vacuum condition.