Final Answer:
In a fixed output hydraulic circuit, the flow rate remains constant regardless of the load, while in a variable output hydraulic circuit, the flow rate can be adjusted based on the load requirements.
Step-by-step explanation:
Hydraulic circuits play a crucial role in controlling the flow of hydraulic fluid to achieve desired mechanical actions. In a fixed output hydraulic circuit, the pump delivers a constant flow rate, denoted as Q₁. This means that the flow remains unchanged regardless of the load on the system. Mathematically, it can be expressed as Q₁ = constant. This design is suitable for applications where a consistent and predictable flow is essential, such as in certain industrial processes.
On the other hand, a variable output hydraulic circuit provides flexibility by allowing the adjustment of the flow rate based on the system's demands. The pump in this circuit can vary its output, denoted as Q₂, to meet different load requirements. Mathematically, this is represented as Q₂ = f(load), indicating that the flow rate is a function of the load. This adaptability is advantageous in applications where the load may change, enabling efficient energy utilization and improved control over the hydraulic system.
The main difference lies in the adaptability to changing conditions. Fixed output circuits are straightforward and reliable for constant load scenarios, while variable output circuits offer versatility in managing varying loads. The choice between the two depends on the specific requirements of the hydraulic system and the nature of the mechanical tasks it needs to perform.