Master Hydraulic Pump Transmission DHT

Involute type pump with crescent partition
Figure 1 shows an involute internal meshing Gear Pump with a crescent shaped partition, with a pressure angle of 20-30 degrees for the involute tooth shape. The center of the driving outer gear and the driven inner gear is arranged eccentrically. Due to the difference in the number of teeth between the driving gear and the driven gear being greater than 2, there is a one-month tooth shaped partition between the oil suction port and the oil outlet port, forming a seal for the high-pressure and low-pressure chambers. The output flow of the Lubrication Oil Pump depends on the pitch diameter and tooth width of the gear. For a given pitch diameter oil pump, the smaller the number of teeth, the greater the output flow.

Critical parameters:

Position oil pump in transmission:

The oil pump is inextricably connected to the engine shaft. It is designed to supply oil under pressure, which is used in the automatic transmission to perform numerous functions. In the process of operation, the oil pump is subjected to severe loads, therefore transmission repair specialists frequently have to deal with oil pump problems. These problems may manifest themselves in total non-operability of this component or pressure drop in the lubrication system. Modern automatic transmissions, equipped with numerous sensors, have the capacity for monitoring the system pressure that allows informing the car owner about problems with the pump. In many cases, the problem with the pump is solved by replacement of the faulty component.