| 摘要 |
A system for automatically delivering lubricant to at least one bearing (16) has a lubricant pump (1) feeding lubricant under pressure through a supply line (3) to an injector (4). The injector, driven by the lubricant, sends a measured amount of lubricant down feed line (14) to bearing (16). A pressurizing valve (15) maintains injection pressure in the feed line (14) enabling any failure of supply to be detected as a pressure drop at pressure switch (2). Preferred features include the incorporation of a second pressurizing valve (12) at the injector end of the feed line (14), a blocked-line vent valve (13) to enable detection of a blocked or crushed feed line, and check valves (10) and (11). The injector (4) is preferably configured to produce a higher pressure at the outlet than the inlet, and various versions of this intensifying injector are described and claimed. |
| 主权项 |
1. A system for automatically delivering lubricant from a reservoir to at least one bearing, the system comprising:
a lubricant pump periodically drawing from the reservoir and delivering lubricant into a supply conduit connected to an inlet of at least one sliding piston injector, wherein the sliding piston injector is adapted to be driven by the lubricant delivered under a supply pressure from the pump and to inject a quantity of the lubricant through an outlet of the sliding piston injector connected to a feed conduit feeding to the bearing, a check valve at the outlet of the sliding piston injector acting to allow discharge of the lubricant from the injector into the feed conduit, but preventing the lubricant from flowing from the feed conduit back into the injector when the pump is inactive, a first pressurising valve located in the feed conduit, having a preset pressure setting and arranged to maintain an injection pressure in the feed conduit in normal operation of the system; and a bypass valve, with a preset pressure setting lower than a maximum supply pressure from the pump, connecting the supply conduit to the feed conduit, bypassing the injector, with the additive preset pressure settings of the bypass valve and the first pressurising valve exceeding the maximum supply conduit pressure from the pump, preventing flow through the bypass valve in normal operation of the system, allowing the supply line pressure to cyclically reach the maximum supply pressure from the pump, wherein, in the case of a feed conduit rupture between the injector and the first pressurising valve, the first pressurising valve ceases to be effective, and the pump delivery bypasses the injector through the bypass valve leading to a reduction in the supply pressure. |
