Hi, Are there machines out there that have a controllable/ variable angle swash plate? Such that- the operator can control the pressure/volume output of the pump - in a situation when it is mated to a diesel engine of constant RPM?
Sorry for answering old comment but indeed there are. Most modern construction, farm and mining equipment has those. There are both tiltable swash plate designs and ones that have tiltable piston block, effectively achieving same variable output volume. Those are called axial flow variable displacement pumps. There's usually hydraulic adjustment valve connected to the pump that adjusts flow according to some variable. The most common is probably adjustment valve that has pilot pressure applied, and the valve tries to keep output pressure constant to that pilot pressure with preset offset. And there are adjustment valves that try to keep pressure always constant despite flow needs. And there are many others. But pilot pressure adjustors are common because when there's little to no load, swash plate can tilt to almost perpendicular to connecting rods resulting in less power consumption and hence smaller load to engine or motor running the pump.
Does someone actually make one like this? Lots of issues with the design. Maximum pump pressure would be determined by the _spring strength,_ (not the motor driving it !!), which would change over time with wear and fatigue. Plus the sliding piston.. cams (?) on the swash plate would be prone to friction and a lot of wear on the pivot joint as the direction of force on it changed 360 degrees every rotation. The typical rotating swash plate version is much stronger.
Been scouring the internet to satisfy my curiosity how these work. Thank you.
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Ayishari😅
Thanks for Information
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Great explanation
This is variable displacement. Plz upload fixed displacement also
Hi,
Are there machines out there that have a controllable/ variable angle swash plate? Such that- the operator can control the pressure/volume output of the pump - in a situation when it is mated to a diesel engine of constant RPM?
If you are asking for a machine, the steering gear of a ship employs swash plate to generate hydraulic pressure for it's functioning.
Sorry for answering old comment but indeed there are. Most modern construction, farm and mining equipment has those. There are both tiltable swash plate designs and ones that have tiltable piston block, effectively achieving same variable output volume. Those are called axial flow variable displacement pumps. There's usually hydraulic adjustment valve connected to the pump that adjusts flow according to some variable. The most common is probably adjustment valve that has pilot pressure applied, and the valve tries to keep output pressure constant to that pilot pressure with preset offset. And there are adjustment valves that try to keep pressure always constant despite flow needs. And there are many others. But pilot pressure adjustors are common because when there's little to no load, swash plate can tilt to almost perpendicular to connecting rods resulting in less power consumption and hence smaller load to engine or motor running the pump.
Can a hydraulic motor with fixed swash plate be run bi-directionally?
Mt stirling engine based on this design works very well....
How work in helicopter swash plate assembly?
Does someone actually make one like this? Lots of issues with the design. Maximum pump pressure would be determined by the _spring strength,_ (not the motor driving it !!), which would change over time with wear and fatigue. Plus the sliding piston.. cams (?) on the swash plate would be prone to friction and a lot of wear on the pivot joint as the direction of force on it changed 360 degrees every rotation. The typical rotating swash plate version is much stronger.
From what I understand the swash plate must have odd no of piston
It is not a must, but odd number of pistons generate a low level of flow pulsations which is harmful for the system.
Can you give ne cad file of this pump