Hydraulic device for hydraulic cylinders
A method of operating a dual acting hydraulic cylinder comprising the steps of returning a hydraulic fluid from a rod-side chamber to a piston-side chamber of the cylinder during a start phase of cylinder extraction with a speed component and increasing pressure of the fluid during end phase of cylinder extraction with a booster component and permitting the fluid to flow from the rod-side chamber to a reservoir. A hydraulic device for operating a dual acting hydraulic cylinder comprising a speed component arranged to return a hydraulic fluid from a rod-side chamber to a piston-side chamber of the cylinder at a start phase of cylinder extraction and a booster component arranged to increase the pressure of the fluid at an end phase of cylinder extraction.
1. A method of operating a dual acting hydraulic cylinder comprising
the steps of:
returning a hydraulic fluid from a rod-side chamber to a piston-side chamber of the cylinder during a start phase of cylinder extraction with a speed component; and
increasing a pressure of the hydraulic fluid during an end phase of cylinder extraction with a booster component, wherein the booster component increases the pressure of the hydraulic fluid being returned from the rod-side chamber to the piston-side chamber of the cylinder.
2. The method of claim 1 , further comprising the step of increasing the pressure of the hydraulic fluid to the cylinder during a cylinder retraction phase with the booster component.
3. The method of claim 2 , wherein the pressure of the hydraulic fluid is increased by the booster component at the rod-side chamber during the cylinder retraction phase.
4. The method of claim 1 , further comprising a step of returning the hydraulic fluid from the rod-side chamber to a reservoir during an intermediate phase of cylinder extraction.
5. The method of claim 1 , wherein the step of increasing the pressure of the hydraulic fluid during the end phase of cylinder extraction comprises increasing the pressure of the hydraulic fluid at the piston-side chamber by a ratio depending on relative diameters of a spool within a booster valve of the booster component.
6. The method of claim 1 , wherein the transition between the start phase of cylinder extraction and the end phase of cylinder extraction is further controlled by a change in the hydraulic fluid pressure.
7. The method of claim 6 , wherein the transition between the start phase of cylinder extraction and the end phase of cylinder extraction is further controlled by a change in a hydraulic fluid flow direction.
8. A hydraulic device for operating a dual acting hydraulic cylinder, comprising:
a speed component arranged to return a hydraulic fluid from a rod-side chamber to a piston-side chamber of the cylinder at a start phase of cylinder extraction; and
a booster component arranged to increase a pressure of the hydraulic fluid at an end phase of cylinder extraction, wherein the booster component increases the pressure of the hydraulic fluid being returned from the rod-side chamber to the piston-side chamber of the cylinder.
9. The device of claim 8 , wherein the booster component is arranged to increase the pressure of the hydraulic fluid to the cylinder during a cylinder retraction phase.
10. The device of claim 9 , wherein the booster component is arranged to increase the pressure of the hydraulic fluid flowing to the rod-side chamber during the cylinder retraction phase.
11. The device of claim 8 , wherein the booster component is arranged to increase the pressure of the hydraulic fluid at the piston-side chamber during a start phase of cylinder retraction.
12. The device of claim 8 , wherein the speed component and the booster component are arranged to be inactive at an intermediate phase of cylinder extraction.
13. The device of claim 8 , further configured to transition between the start phase of cylinder extraction and the end phase of cylinder extraction under a control of the pressure of the hydraulic fluid.
14. The device of claim 13 , further configured to transition between the start phase of cylinder extraction and the end phase of cylinder extraction under further control of a hydraulic fluid flow direction.
15. A demolition tool, comprising:
a hydraulic cylinder configured to actuate the demolition tool;
a device for operating a dual acting hydraulic cylinder;
a coupling mechanism;
the coupling mechanism configured to connect the hydraulic cylinder and the device;
a speed component located within the device;
the speed component arranged to return a hydraulic fluid from a rod-side chamber to a piston-side chamber of the dual acting hydraulic cylinder at a start phase of cylinder extraction;
a booster component located within the device;
the booster component arranged to increase a pressure of the hydraulic fluid at an end phase of cylinder extraction, wherein the booster component increases the pressure of the hydraulic fluid being returned from the rod-side chamber to the piston-side chamber of the cylinder.
16. The demolition tool of claim 15 , wherein the booster component is arranged to increase the pressure of the hydraulic fluid during a cylinder retraction phase.
17. The demolition tool of claim 16 , wherein the booster component is arranged to increase the pressure of the hydraulic fluid flowing to the rod-side chamber during the cylinder retraction phase.
18. The demolition tool of claim 15 , wherein the booster component is arranged to increase the pressure of the hydraulic fluid at the piston-side chamber during a start phase of cylinder retraction.
19. The demolition tool of claim 15 , wherein the device is configured to transition between the start phase of cylinder extraction and the end phase of cylinder extraction under a control of the hydraulic fluid pressure.
20. The demolition tool of claim 15 , wherein the device is configured to transition between the start phase of cylinder extraction and the end phase of cylinder extraction under further control of a hydraulic fluid flow direction.