Engines - Installation and Start-up Flashcards
What five factors should be considered when mounting industrial engines?
- Size
- Weight
- Characteristics
- Driven loads
- Operating cycle of the machine
Each factor influences how the engine should be installed to ensure optimal performance.
What three problems can arise from inadequate engine foundation and mounting?
- Machine misalignment
- Machine and building vibration
- Machine torsional stress
These issues can lead to operational inefficiencies and damage to machinery.
True or False: There is a single universal mounting system for all industrial engines.
False
Each engine must be mounted according to its specific application and requirements.
What is the role of vibration isolators in engine installations?
To isolate the engine from vibrations produced by other machinery
This helps to reduce noise and improve operational stability.
What are the two fundamental concerns in the foundation of any industrial engine?
- Prevent distortion of the engine block or base
- Ensure alignment of the crankshaft with the driven machine
What can happen to the crankshaft if the hold-down bolts are tightened to a deformed foundation?
The crankshaft can be forced into a bent position
Why must the driven machine be aligned to the engine crankshaft?
The load must be aligned to the engine crankshaft to ensure proper operation
What is the consequence of a base that is not strong enough or that moves?
It causes misalignment between the machines
What effect does misalignment due to a poor foundation have on the engine structure?
It results in stresses on the engine structure, potentially leading to component damage
What should the mass of the foundation be in relation to the complete engine?
At least 2½ times the mass of the complete engine
Fill in the blank: A foundation must rest on an adequate _______.
Base
True or False: A strong foundation can help prevent catastrophic failure of coupled machines.
True
What can result from stresses on the engine structure due to misalignment?
Component damage of the coupled machines
What is the importance of the foundation in relation to installation problems?
A well-constructed foundation reduces the likelihood of installation problems
What separates the engine foundation from the building in a properly engineered installation?
Isolators, usually wood or rubber separators about ¾ inches thick
These isolators are placed between the building foundation and the engine mounting block (inertia block).
Why is it better to isolate each engine foundation from others in a building?
It reduces the possibility of vibration transfer from one engine to another
This isolation helps in minimizing potential problems related to vibrations.
What is a major concern regarding the engine foundation throughout its life?
The integrity of the engine foundation
Protecting the foundation is crucial as regrouting or refurbishing it is time-consuming and costly.
What can cause premature deterioration of the engine foundation?
Impregnation with oil or water
This is a major cause of foundation failure.
What is the best preventive measure for protecting the engine foundation?
Use a high quality concrete sealer on the entire engine foundation
This helps in preventing deterioration due to oil or water.
What must be ensured regarding the expansion of the engine foundation?
It must be allowed to expand freely and evenly along with the machine
This ensures that the foundation does not become stressed or damaged.
Fill in the blank: The engine must be mounted so that the oil reservoir does not contact the _______.
foundation
This is important to prevent potential issues related to oil contamination.
What should you inspect on the entire engine during installation?
Damage, loose connections, broken or sharply bent lines, loose nuts or bolts
Ensuring all engine components are intact is crucial for safe operation.
What types of openings on the engine should be checked for foreign objects?
Intake, exhaust, water, fuel lines
Openings without coverings can allow debris to enter the engine, potentially causing damage.
What does it mean if the engine has abnormal resistance to rotation?
It may indicate rust or corrosion causing seizure
Seizure may require engine disassembly to resolve.