Control forces of hydraulic piston pump

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SUMMARY

The discussion centers on designing a foot pedal mechanism to actuate two hydraulic piston pumps, which require over 100 In-lbs of torque to operate effectively. The challenge lies in the excessive effort needed to engage the foot pedal due to the high torque requirements, exceeding 50 In-lbs per pump at full stroke. Participants are seeking solutions to reduce the effort required to actuate the pumps while maintaining functionality. The conversation emphasizes the need for a more efficient design to facilitate easier operation of the hydraulic system.

PREREQUISITES
  • Understanding of hydraulic systems and piston pump mechanics
  • Knowledge of torque calculations and mechanical advantage
  • Familiarity with foot pedal design and ergonomics
  • Experience with spring mechanisms and their applications in control systems
NEXT STEPS
  • Research mechanical advantage principles to optimize foot pedal design
  • Explore alternative spring configurations to reduce return torque
  • Investigate hydraulic fluid properties and their impact on pump performance
  • Examine existing foot pedal mechanisms in similar hydraulic applications for design inspiration
USEFUL FOR

Mechanical engineers, hydraulic system designers, and anyone involved in the design and optimization of foot-operated hydraulic controls will benefit from this discussion.

Ken.Li
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We are designing a foot pedal mechanism to actuate two hydraulic pistion pumps.
But the torque to actuate a pump is more than 50In-lbs at full stroke. In addition, a
spring is used to make the control shaft of a pump return to its neutral position.
Totally the torque to actuate a pump is over 100In-lbs.
So the effort applied on the foot pedal to actuate two pumps is much more I expected.
Can someone tell me any ways to reduce the effort on the foot pedal?
Many thanks.
 
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Ken.Li said:
We are designing a foot pedal mechanism to actuate two hydraulic pistion pumps.
But the torque to actuate a pump is more than 50In-lbs at full stroke. In addition, a
spring is used to make the control shaft of a pump return to its neutral position.
Totally the torque to actuate a pump is over 100In-lbs.
So the effort applied on the foot pedal to actuate two pumps is much more I expected.
Can someone tell me any ways to reduce the effort on the foot pedal?
Many thanks.

Please describe the piston pumps, fluid to be pumped, and application. The way I read your post, you want to rotate the pumps that are pumping a fliud by pushing down on a pedal? Like a bicycle pedal?
 

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