A swash plate motor is a particularly compact design of reciprocating piston motor in which several pistons are arranged parallel to the drive shaft and transmit their force via a swash plate or pivot plate. This design enables high power density and a small end face, making it ideal for applications where installation space and weight are critical. The rolling bearings in this system play a key role: they support the main shaft and the swash plate assembly under complex dynamic loads – including axial and radial forces – and ensure the precise alignment of the moving components. Under conditions such as high speeds, changing loads, and limited lubricant volumes, the bearings minimize friction, ensure smooth running, and directly influence the efficiency, service life, and reliability of the motor.
Typical application requirements
Axial ball bearings:
- Ability to carry oblique, eccentric, and dynamic forces
- High speeds
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Operating conditions:
- The swash plate rotates at a speed of ~ 4,000 rpm.
- Oblique, eccentric, and dynamic forces acting on both bearings.
- Vibrations.
Bearing requirements:
- Operating hours: >1,000 h
- Friction reduction
Our development services:
The development of roller bearings for swash plate motors requires the highest precision and engineering expertise. Due to the extreme demands placed on compact design, high power density, and precise alignment, we rely on advanced simulations and optimized geometries. The goal is to create bearing solutions that ensure minimal friction, maximum rigidity, and a long service life under high axial and radial loads and with limited lubricant volume.
Our typical development workflow for this application area:
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Analysis of current status
- System mechanics analyses
- Simulative system evaluation (digital twin)
- Identification of possible failure mechanisms
Lifetime assessment and optimization
- Selection of critical parameters
- Simulative system assessment
- Variation of design parameters
Maximum permissible angle of inclination of forces
- Selection of critical parameters
- Simulative system evaluation
- Variation of design parameters
Prototype and series production
- Drawings and 3D data
- Manufacturing partners
- Delivery of samples and approval documentation, e.g., EMPB/PPAP