Piston Group
The piston group is a critical reciprocating assembly within the radial piston hydraulic motor, responsible for converting hydraulic pressure into mechanical force. Each piston group consists of a precision-machined piston, a roller bearing, a piston ring, and a bushing. As pressurized fluid enters the piston chamber, it forces the piston outward against the stator's internal cam surface. The roller follows the contoured raceway, transforming the linear motion of the piston into tangential force that drives the rotor to rotate. The piston ring provides effective sealing between the piston and cylinder bore, minimizing internal leakage and ensuring high volumetric efficiency. Manufactured from high-strength materials with precision-ground surfaces, the piston group ensures reliable operation under continuous high-pressure conditions. Available for OMS and OMCR series motors with model-specific configurations.
Features
- Precision-machined piston - ensures smooth reciprocating motion and minimal friction
- Roller bearing design - reduces friction losses and improves mechanical efficiency
- Piston ring sealing - minimizes internal leakage and maintains high volumetric efficiency
- Low-inertia construction - enables high starting torque and smooth low-speed operation
- High-strength materials - withstands continuous high-pressure operation
FAQ
Q: What components are included in a piston group?
A: A complete piston group includes the plunger piston, roller, piston ring, bushing, and spring pin.
Q: How often should piston rings be replaced?
A: Piston rings should be inspected during major overhauls. Replace them if you notice increased internal leakage, reduced motor efficiency, or visible wear on the rings.
Q: Why are your piston groups more affordable than competitors'?
A: We are manufacturer. Factory-direct pricing, no markups - with volume discounts available for large orders.
