This utility model discloses a hydraulic
oil tank for a hydraulic
oil pump. The tank body has cross-sections formed at a set of
diagonal sides, one of which has an oil suction port and the other has an oil return port. The oil suction port's
pipe extends into the tank body and connects to a coarse filter. The coarse filter is connected to a funnel-shaped expansion suction head via a threaded connector. The oil return port's outlet is connected to a fine filter, which is connected to a one-way
throttle valve. The one-way
throttle valve is connected to a flow-regulating
pipe, which is curved and located within the tank body. This invention adds a funnel-shaped expansion suction head at the oil suction port to reduce suction resistance and minimize inlet disturbance. The addition of a flow-regulating
pipe at the oil return port slows down the return oil flow. Combined with the 45° oblique
cut, this effectively disperses the
impact force of the oil and reduces disturbance. Furthermore, the
diagonal distribution of the oil suction and return ports extends the oil flow path, promoting
impurity sedimentation and
air separation.