Inversions of Single Slider crank Mechanism in Tamil #tom #kom #mechanism

Summary

This video explains the working principle and inversions of the single slider crank mechanism, where rotary motion is converted into reciprocating motion. It covers various mechanisms, including the pendulum pump, oscillating cylinder engine, rotary internal combustion engine, crank and slotted lever quick return mechanism, and Whitworth quick return mechanism. The script describes each mechanism's link configuration and the specific motions they produce, highlighting how these mechanical systems are used in various engines and pumps. The video serves as a comprehensive guide to understanding the dynamics of these mechanisms in mechanical engineering.

Takeaways

• 😀 The single slider-crank mechanism converts rotary motion into reciprocating motion through the movement of the crank, connecting rod, and slider.
• 😀 The frame of the mechanism remains fixed while the crank rotates, driving the connecting rod and slider to produce reciprocating motion.
• 😀 The main components of the single slider-crank mechanism are the frame, crank, connecting rod, and slider.
• 😀 The first inversion of the single slider-crank mechanism is the **Pendulum Pump**, where the piston rod is driven by the rotating crank to supply water.
• 😀 The second inversion is the **Oscillating Cylinder Engine**, where the piston rod is connected to the crank, causing the cylinder to oscillate as the piston moves back and forth.
• 😀 The third inversion is the **Rotary Internal Combustion (IC) Engine**, where the crank rotates and the connecting rod moves the piston inside the cylinder, converting rotary motion to reciprocating motion.
• 😀 The **Crank and Slotted Lever Quick Return Mechanism** (fourth inversion) features a quick return stroke, with the cutting stroke taking more time than the return stroke.
• 😀 The **Wirth Quick Return Mechanism** (fifth inversion) is similar to the crank and slotted lever mechanism but uses a slotted bar to produce the quick return motion.
• 😀 The quick return motion is designed to make the return stroke faster than the cutting stroke, optimizing the time for each stroke.
• 😀 The fixed link in each inversion determines the movement and function of the mechanism, with different configurations affecting how the mechanism operates in each inversion.

Q & A

What is the primary function of the single slider crank mechanism?

The primary function of the single slider crank mechanism is to convert rotary motion from the crank into reciprocating motion through the connecting rod and slider.

What are the four main components of a single slider crank mechanism?

The four main components of the single slider crank mechanism are the frame, the crank (rotating element), the connecting rod, and the slider.

How does the crank in the single slider crank mechanism contribute to motion?

The crank rotates about the fixed frame, and through the connecting rod, it causes the slider to move back and forth, converting rotary motion into reciprocating motion.

What is the first inversion of the single slider crank mechanism, and how does it work?

The first inversion is the pendulum pump mechanism. In this inversion, Link 4 (slider) is fixed, Link 2 (crank) rotates, and the connecting rod acts as a pump to supply water.

In the second inversion, the oscillating cylinder engine, how are the components arranged?

In the oscillating cylinder engine, Link 1 (piston rod) is the reciprocating part, Link 2 (crank) is the rotating part, and the connecting rod facilitates the oscillating motion of the piston.

What is the function of the rotary internal combustion engine (third inversion)?

In the rotary internal combustion engine, Link 1 (cylinder) is fixed, and the rotating crank (Link 2) moves the piston (Link 3) inside the cylinder, creating reciprocating motion for the engine.

How does the crank and slotted lever quick return mechanism work?

In the crank and slotted lever quick return mechanism, the slider (Link 1) moves back and forth while the crank (Link 2) rotates. The slotted lever ensures the return stroke is quicker than the cutting stroke.

What distinguishes the Witworth quick return mechanism from other quick return mechanisms?

The Witworth quick return mechanism uses a slotted bar (Link 1), a fixed link (Link 2), and a driving link (Link 3) to produce a quick return stroke, where the return stroke is shorter than the cutting stroke.

Why is the return stroke faster than the cutting stroke in quick return mechanisms?

The return stroke is faster than the cutting stroke in quick return mechanisms because of the specific geometry and motion control of the slotted bar, which shortens the return time.

What role does the slotted bar play in the Witworth quick return mechanism?

In the Witworth quick return mechanism, the slotted bar acts as a guiding link that controls the motion of the slider, ensuring the cutting stroke is longer and the return stroke is shorter.