Oil feed pump and retarder system

The invention relates to the technical field of retarder equipment, in particular to an oil supply pump and a retarder system.The oil supply pump is used for the retarder system and comprises a shell and an adjusting assembly, an oil supply cavity is formed in the shell, the oil supply cavity is divided into a plurality of cavities through the adjusting assembly, and when the pressure of liquid in any one of the cavities reaches a threshold value, the oil supply cavity is opened. The adjusting assembly changes the volume of the multiple cavities so as to adjust the oil output amount of the oil supply pump. According to the oil supply pump and the retarder system, the oil supply pump achieves control over the oil output amount by changing the pressure intensity of liquid (such as hydraulic oil) in all the cavities, the mode that in the prior art, the oil output amount is controlled through compressed air is effectively replaced, the situation that air is mixed into a control oil way is avoided, and the oil sup