Author: JackSparow

Hydraulic Presses Machines

{2 Comments}

Hydraulic Presses Machines

Presses action are typically used for molding, shaping, shearing, and many other operations. To understand the hydraulic pressing calculation, let us set an example of a 30-in. bore and 10-in. stroke hydraulic press cylinder. The system needs to complete the operation in 30 s. The flow rate required to complete an individual press is 61 …

Read More…

Gear-Type Flow Divider Valve

{0 Comments}

Gear-Type Flow Divider Valve

The gear-type flow divider valve works like two hydraulic gear motors with attached shafts. The both motor must have to run at the same speed since their shafts are attached. Thus, the same flow goes through both sides. The flow is equally divided and the cylinders actuator extends simultaneously. Gear-type flow divider has a pressure …

Read More…

Hydraulic Automatic Transmission Performance

{0 Comments}

Hydraulic Automatic Transmission Performance

Six gears direct-drive transmission and three shifts automatic transmission/ torque converter performance is shown in figure above. In the figure we can see that three shift on torque converter have the power transfer bands as smooth as the power line produced with six shifts. However, the automatic transmission has higher power loss which is indicated …

Read More…

Gearboxes Hydraulic Pump Mounts

{0 Comments}

Gearboxes Hydraulic Pump Mounts

Hydraulic pump mounts are gearboxes that are designed to drive the pumps. These gearboxes have one input and provide connections for mounting one to four pumps on the output side. Mounts can be equipped with clutches and available for different gear ratios. When a diesel engine is used as the prime mover, the engine must …

Read More…

Multiple Hydraulic Pump Circuits

{0 Comments}

Multiple Hydraulic Pump Circuits

The multiple hydraulic pump types install two or more pumps in the same housing and use a single shaft to drive. Each pump has its own outlet although in some application one inlet is provided. The pump shown in figure above drives the fluid to a hydraulic motor and cylinder actuator. When the electric solenoid …

Read More…

Hydraulic Vane Pump Volumetric Efficiency

{0 Comments}

Hydraulic Vane Pump Volumetric Efficiency

Vickers Pump Model 25V-T is a hydraulic vane pump which has a 4.81 in3/rev displacement with max speed 1800 rpm and max pressure 2500 psi. The vane pump volumetric efficiency at 1200 rpm decreases from 97.3% at 500 psi to 84% at 2500 psi. While the hydraulic gerotor pump volumetric efficiency decreased from 91.5 to …

Read More…

Basic Hydraulic Servo Systems

{0 Comments}

Basic Hydraulic Servo Systems

Four basic hydraulic servo systems: 1. Valve motor two servo actuator system or servo motor. 2. Valve cylinder two servo actuator system or servo cylinders. In two servo-actuator systems, the valve is mounted directly on the actuator to avoid the increases of natural frequency. 3. Servo pump-motor two servo pump systems. 4. Split servo pump-motor …

Read More…

Hydraulic Variable Displacement Pump

{0 Comments}

Hydraulic Variable Displacement Pump

An expensive hydraulic variable displacement pump offers many options for hydraulic circuit design. The pump displacement can be changed using a servo valve to manipulate the actuator speed movement. The open loop hydraulic design as shown in figure above can be re-design in to a closed loop system by adding sensor on the gearbox output …

Read More…
You might also likeclose