Cotter joint contains has mainly three components 1. Question is ⇒ The piston rod of a steam engine is usually connected to the cross head by means of, Options are ⇒ (A) bolted joint, (B) knuckle joint, (C) cotter joint, (D) universal joint, (E) universal coupling., Leave your comments or Download question paper. Socket 2. It is used to connect two co-axial rods which are subjected to either axial tensile or axial compressive load. As the joint is subjected to axial load, then strength is the criteria for material selection. 2) Joint between piston rod and pump rod. Design a cotter joint for fastening the piston rod to the cross head of the engine having cylinder diameter 0.24 m and steam pressure is 0.7 N/mm 2. In steam engines, the steam is utilised as the working substance.Those engines operate on the principle of the first law of thermodynamics, i.e., heat and work are mutually convertible.. Spigot 3. cotter 6. • These joints may be subjected to tensile or compressive forces along the axes of the rods. Instead they use trunk pistons, where the piston and crosshead are combined and so do not need a rod between them.The term piston rod has been used as a synonym for 'connecting rod' in the context of these engines. Crosshead is used in horizontal steam engines for connecting the piston rod and connecting rod.The crosshead, with the help of slide block 4, reciprocates between two guides provided in the engine frame. Application: 1) Joint between piston rod and cross-head of steam engine. It is usually used in connecting a piston rod to the crosshead of a reciprocating steam engine, a piston rod and its extension as a tail or pump rod, strap end of connecting rod etc. Located in a sliding crosshead that connects to the piston via a rod. Internal combustion engines, and in particular all current automobile engines, do not generally have piston rods. In a reciprocating steam engine, as the heat energy in the steam is converted into mechanical work by the reciprocating (to and fro) motion of the piston it is also called a reciprocating steam engine. The crosshead, with the help of slide block 4, reciprocates between two guides provided in the engine frame. A piston P is reciprocable in the cylinder C and has a piston rod R project0 ing down through a combined stuffing box and guide A and connected to a cross head H which slides in a cross head guide G supported on the crank case or frame F of the engine. The piston rod 2 is secured to the crosshead block by means of the cotter 5. [citation needed]Engines with crossheads have piston rods. Wikipedia The thickness of the cotter is to be 0.3 times piston rod diameter at the point where the cotter is located. Cotter's joint is widely used to connect the piston rod and crosshead of a steam engine, as a joint between the piston rod and the tailor pump rod, foundation bolt, etc. 1) Selection of material. • Examples of cotter joint connections are: connection of piston rod to the crosshead of a steam engine, valve rod and its stem etc. 4. In internal combustion engines, the gudgeon pin (UK, wrist pin US) connects the piston to the connecting rod, and provides a bearing for the connecting rod to pivot upon as the piston moves. The gudgeon pin 3, connects the slide blocks with the crosshead block 1. Cotter Joint Definition: Cotter's joint is used to connect two rods subjected to compressive or axial tensile loads. This acts as a pin joint for the connecting rod (not shown in the figure). In a steam engine, the piston rod is usually connected to the cross-head by means of a a) Knuckle joint b) Cotter joint c) Oldham coupling d) Universal joint The gudgeon pin 3, connects the slide blocks with the crosshead block 1. Types of Cotter Joints Socket and spigot cotter joint, Sleeve and cotter joint, and Gib and cotter joint. 5.