tailieunhanh - A text book on engineering graphics: Part 2

(BQ) Part 2 book "A text book on engineering graphics" has contents: Bearings, bearings, tie rod and pipe joints, shaft couplings, pulleys. Please refer to the content. | CHAPTER 3 BEARINGS All of you have seen a bicycle and most of you may know how to ride it. With the help of paddles you may have driven it. It needs very little effort to run a bicycle. Do you know why a bicycle runs so smoothly and easily? The reason is that friction is greatly reduced by using bearings in the moving parts and you must have oiled/ greased these bearings from time to time. In the industry also the bearings are used to help in smooth running of the shafts. As we all know that the friction is a necessary evil. The friction generates heat and opposes the free movement of the moving parts. We can not eliminate the friction together but we can reduce it to a large extent by using some suitable lubricant. The meaning of bearing as given in the Dictionary is a part of a machine which support another part that turns round a wheel' or it can be defined as the support and guide for a rotating ,oscillating or sliding shaft, pivot or wheel' . Bearings are used as a mechanical component to a certain part and this is done by utilizing the small frictional force of the bearings, which makes them rotate easily, all the while with the force and load acting against them. CLASSIFICATION OF BEARINGS There are two types of bearings according to the type of motion: 1. Plain bearings and 2. Anti-Friction bearings or Rolling Bearings We will learn that plain bearings are such that they primarily support sliding, radial and thrust loads and linear motions also. Plain bearings may further be classified as: 1. Plain Journal Bearings: These support radial loads at right angles to the shaft axis. 2. Spherical Bearings: These are used where the loads are not aligned and are radial. 3. Thrust Bearings: These bearings support axial and radial loads. 4. Linear Bearings: These bearings only help in linear motion. 5. Pivot Bearings or Foot Step Bearings: These bearings are used where the thrust is only axial. ENGINEERING GRAPHICS 87 BEARINGS ANTI-FRICTION OR .

• Đồ họa - Thiết kế - Flash
• Electrical engineering
• Plain journal bearings
• Thrust bearings
• Linear bearings
• Orthographic views
• Shaft couplings
• electrical
• electronic and electrical industry
• electrical professional
• specialized dictionaries li arts
• Electrical Engineering Dictionary
• The electrical engineering handbook
• The electrical engineering
• The hall effect
• Power systems
• Electrical machines
• Digital devices
• Computer engineering
• Electrical Engineering Dictionar
• Summary of mechanical engineering and engineering mechanics doctoral thesis
• The mechanical model and calculating design
• Electrical generator for sea wave energy
• The electrical generator
• Vietnams sea condition
• Passive components
• Voltage and current sources
• Linear circuit analysis
• Passive signal processing
• Electronic devices
• Lecture Electrical Engineering
• Semiconductor materials
• Microelectronic circuits
• Integrated electronics
• Biasing stability
• Fixed bias circuits
• Amplifier gain
• Common emitter amplifier
• Common emitter characteristics
• Small signal operation
• BJT amplifier circuits
• Discrete circuit design
• Transistor amplifier
• DC Analysis
• Characteristic parameters
• BJT internal capacitances
• High frequency BJT model
• Qualitative operation of MOSFET
• Channel for current flow
• MOS field effect transistors
• Current voltage characteristics
• Circuit symbol
• MOSFET Circuit
• Voltage biasing scheme
• Fixing voltage
• Semiconductor devices
• Carrier transport in semiconductors
• Bipolar Junction Transistors