Lubricating system and pumping unit with lubricating system

A lubricating system for a pumping unit, the pumping unit comprising a rack, a balancing device, a transmission wheel, and a transmission conveying device cooperated with the transmission wheel, the lubricating system comprising:

• an oil pool and a roller lubrication device, a bottom of the transmission wheel being impregnated in the oil pool, the roller lubrication device being in rolling contact with the transmission conveying device, wherein the lubricating system further comprises an oil return device disposed above the oil pool, wherein the oil return device is configured to collect splashing oil driven by the transmission conveying device, so as to clean the splashing oil and then allow the splashing oil to flow back into the oil pool;
• wherein the oil return device is an oil spill filter device, and the splashing oil flows back into the oil pool after exceeding a set liquid level;
• the lubricating system further comprise a splash collection system, the splash collection system being disposed on an upstream of an oil passage of the oil spill filter device and configured to guide the splashing oil to the oil spill filter device;
• the splash collection system is a guiding device for guiding the splashing oil to the oil spill filter device;
• the guiding device is a guiding plate for a top of the rack and/or a guiding plate for a top of the balance device.