Saws
Cutters
Drills
Impact Wrenches
Torque Wrenches
Mining Waterjet Cutting Machine
Hammers
Scaler
Rammer
Grinders
Fan
Hoist
Winch
Pump
Assembly
Cutting
Drilling
Assembly
Hammer & Shovel
Grinding
Hydraulic Accessories
General Accessories
Events
Case Study
Industry News
source:Industry News release time:2021-12-18 Article author:Rosit Popular:Air band saw
1. Structure
The main body of the camshaft is a cylindrical rod with the same length as the cylinder group. There are several cams on it, which are used to drive the valve. One end of the camshaft is the bearing support point, and the other end is connected with the driving wheel. The side of the cam is egg-shaped. The purpose of its design is to ensure adequate intake and exhaust of the cylinder, specifically to complete the opening and closing of the valve in the shortest possible time. In addition, considering the durability of the engine and the smoothness of operation, the valve should not have too much impact due to the acceleration and deceleration process in the opening and closing action, otherwise it will cause severe valve wear, increased noise or other serious consequences. Generally speaking, in in-line engines, one cam corresponds to one valve, while V-type engines or horizontally opposed engines share one cam for every two valves. Because of their special structure, rotary engines and valveless engines do not need cams.
2. Failure
Common failures of camshafts include abnormal wear, abnormal noise, and breakage. Symptoms of abnormal wear often appear before abnormal noise and breakage occur.
(1) The camshaft is almost at the end of the engine's lubrication system, so the lubrication status is not optimistic. If the oil pump has insufficient oil supply pressure due to reasons such as excessive use time, or the lubricating oil passage is blocked and the lubricating oil cannot reach the camshaft, or the tightening torque of the bearing cap fastening bolts is too large, the lubricating oil cannot enter the camshaft gap. Cause abnormal wear of the camshaft.
(2) Abnormal wear of the camshaft will cause the gap between the camshaft and the bearing seat to increase, and the camshaft will undergo axial displacement when it moves, resulting in abnormal noise. Abnormal wear will also cause the gap between the driving cam and the hydraulic tappet to increase. When the cam is combined with the hydraulic tappet, an impact will occur, which will cause abnormal noise.
(3) The camshaft sometimes has serious failures such as fractures. The common causes are hydraulic tappet cracking or severe wear, severe lubrication, poor camshaft quality, and camshaft timing gear rupture.
(4) In some cases, the failure of the camshaft is caused by man-made reasons, especially when the camshaft is not properly disassembled and assembled when the engine is repaired. For example, when removing the camshaft bearing cover, use a hammer or a screwdriver to pry pressure, or when installing the bearing cover, the position of the bearing cover is mismatched with the bearing seat, or the tightening torque of the bearing cover fastening bolt is too large.
Read recommendations:
AN11-10000 Electric servo CNC Torque Wrench
related articles
Using Chainsaws to Cut Snow?
2024-05-21What to do if the pneumatic wrench is weak
2022-12-19Hydraulic chain saw
2022-12-13Operation of the wrench
2022-12-06Introduction to the principle of pneumatic wrench
2022-11-28How to use the pneumatic wrench
2022-11-21Brief introduction to the principle of pneumatic wrench
2022-11-14Impact pneumatic wrench
2022-11-07Correct hydraulic wrench operation procedure
2022-11-01Hydraulic wrench torque pressure conversion
2022-11-01Field operation procedure of hydraulic wrench
2022-10-24Hydraulic radial plunger motor
2022-10-17The history of hydraulic motors
2022-10-17Principle of balance hydraulic wrench
2022-10-10The Price Factor of Smart Electric Torque Wrench
2022-10-10Introduction to the advantages of using intelligent electric torque wrench
2022-10-10The Price Factor of Smart Electric Torque Wrench
2022-10-10Classification and use of wrenches
2022-10-10hydraulic wrench pressure conversion
2022-10-10Introduction to the advantages of the use of intelligent electric torque wrench
2022-10-10Smart Electric Torque Wrench Selection Guide
2022-10-10Intelligent electric torque wrench for wind power generation
2022-10-09Uses of open-end wrenches.Pneumatic chainsaw
2022-10-08What are the driving parts of a hydraulic wrench and what they do
2022-09-30What are the driving parts of a hydraulic wrench and what they do
2022-09-23the commonly used wrenches
2022-09-22Introduction of several common wrenches
2022-09-21Application scope and daily maintenance method of hydraulic bolt tensioner
2022-09-20Characteristics of hollow hydraulic wrench and precautions for use
2022-09-19Characteristics and precautions of driving hydraulic wrench
2022-09-17Power Tools
AN71-20000 Torque Multiplier
2023-06-29AK21-080 Pneumatic C-Hog Ring Plier (1.5 coil)
2023-06-29DM31-035 Hydraulic Magnetic Drill
2022-12-30RH21-2300 Pneumatic Chipping Hammer
2021-06-16DM21-045 Pneumatic Magnetic Drill
2022-12-15AK71-130 Manual C-Hog Ring Plier (1.5 coil)
2022-12-12GP61-100 Emulsion Submersible Pump
2023-06-29AN11-600 Electric servo CNC Torque Wrench
2022-12-20AK21-065 Pneumatic C-Hog Ring Plier (1.5 coil)
2023-06-29AN31-15000 Hydraulic Torque Wrench
2023-06-27GG21-050 Pneumatic Angle Grinder
2022-12-28OW63-020 Integrated Emulsion Mining Waterjet Cutting Machine
2023-05-10AN23-8000 Pneumatic Torque Wrench (Angle Shaft)
2024-03-12GP21-030 Pneumatic Submersible Pump
2022-12-29DM22-030 Pneumatic Rail Drill
2023-06-19AW22-750 Pneumatic Impact Wrench (Ultra-Light Series)
2022-12-20RH21-1450 Pneumatic Chipping Hammer
2021-06-16CB31-120 Hydraulic Band Saw
2020-06-13AN11-3000 Electric servo CNC Torque Wrench
2023-06-27DM22-016 Pneumatic Rail Drill
2020-06-13DH21-026 Pneumatic Hammer Drill
2021-06-10OF27-360 Heavy Fixed Fan
2023-06-28CH31 series Hydraulic Pipe Cutter
2022-12-12AK21-130 Pneumatic C-Hog Ring Plier (1.5 coil)
2023-06-29DB21-040 Pneumatic Rotary Drill Heavy Duty
2023-06-19AN71-15000 Torque Multiplier
2023-06-29LW21-005 Pneumatic Winch
2023-01-06AN31-10000 Hydraulic Torque Wrench
2023-06-27AN71-1500 Torque Multiplier
2022-12-27AN31-4500 Hydraulic Torque Wrench
2023-06-27Accessories
Split Hollow Drill Bits丨DC82
2023-06-07Alloy Drill Bits丨813 Series
2023-06-06Clamps
2023-06-06Carborundum saw Blades
2023-06-06Diamond Saw Chains
2020-06-13Hard Alloy Hollow Drill Bits assy.丨DB85 Series
2023-06-07Tool Bits
2023-06-07Grinding Disc
2023-06-07Pipe Fixed Clamps丨CB861-18
2023-06-06Alloy Twist Drill Bits
2023-06-06Cutting Blades
2023-06-07Non-metallic Alloy Saw Blades
2023-06-06Alloy Twist Drill Bits丨DB81 Series
2023-06-06Chisels
2023-06-07Alloy Saw Blades丨CR814 Series
2023-06-06Alloy Drill Bits丨811 Series
2023-06-06Shovel Blades
2023-06-07Sleeve KIT
2023-06-07Diamond Saw Blades
2023-06-06Carbide Hollow Bits丨DM818 Series
2023-06-06Optional Accessories
2023-06-07Pipe Fixed Clamps丨CB861-12
2023-06-06Alloy Drill Bits丨812 Series
2023-06-06Alloy Sleeves
2023-06-07Platform Clamps丨CB863-19
2023-06-06Alloy Saw Blades丨CR816 Series
2023-06-06Filter assy.
2023-06-07Filter assy.
2023-06-07Cross Clamps丨CB862-22
2023-06-06Carborundum Saw Chains
2023-06-06