LUBRICATION SYSTEM FOR TOOL

摘要

A lubrication system for a tool powered by a drive fluid is provided. The lubrication system includes a reservoir configured to deliver a lubricant and a plunger disposed within the reservoir. The plunger is configured to selectively generate a pilot signal based on a level of the lubricant. The lubrication system further includes a valve having a housing. The housing includes a drive fluid inlet and a drive fluid outlet. The valve also includes a pilot spool configured to move from a neutral position to an actuated position in response to the pilot signal. The valve further includes a main spool selectively actuated by a pressure of the drive fluid to move from a first position to a second position in response to the movement of the pilot spool such that in the second position the drive fluid inlet is in fluid communication with the drive fluid outlet.

主权项

1. A lubrication system for a tool powered by a drive fluid, the lubrication system comprising:
a reservoir configured to deliver a lubricant; a plunger disposed within the reservoir, the plunger configured to selectively generate a pilot signal based on a level of the lubricant; and a valve comprising:
a housing having a drive fluid inlet and a drive fluid outlet;a pilot spool provided at least partly within the housing, the pilot spool configured to move from a neutral position to an actuated position in response to the pilot signal from the plunger; anda main spool comprising a hollow portion at least partially surrounding the pilot spool, the main spool being selectively actuated by a pressure of the drive fluid to move from a first position to a second position in response to the movement of the pilot spool, wherein in the second position the drive fluid inlet is in fluid communication with the drive fluid outlet.