/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 25 Describe three situations in whi... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 11: Problem 25

Describe three situations in which seals are applied in machine design.

Short Answer

Expert verified
Seals are used in machine design to maintain system integrity such as by preventing fluid leakage in hydraulic systems, blocking entry of contaminants in bearing systems, and maintaining pressure in air conditioning systems.

Step by step solution

01

Situation 1: Preventing fluid leakage in hydraulics

In hydraulic systems like a car's brake system, seals are applied to ensure no fluid leaks out which could lead to failure of the brakes. They are often fitted around the piston inside the brake cylinder.
02

Situation 2: Preventing ingress of contaminants

Seals are used in machinery such as roller bearings to prevent the penetration of dust, dirt, and water which can cause premature wear and failure. For instance, seals are used on the outer race of the bearing, closing off the gap and protecting the inside.
03

Situation 3: Sealing pressurized systems

In pressurized systems like a car's air conditioning system, seals are used to retain the pressure and prevent the refrigerant gas from escaping. They are typically found at connection points of different components such as the compressor and the condenser.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Hydraulic Systems
Hydraulic systems play a significant role in modern machinery by utilizing fluids to transmit power. This type of system can be found in various applications, such as the braking system in vehicles. Hydraulic systems work based on Pascal's principle, which states that pressure at one point in a fluid is the same in all directions in a closed system.

Here is why seals are crucial in hydraulic systems:
  • Seals prevent fluid leakage, ensuring the system can maintain the necessary pressure to function effectively.
  • They help avoid situations where escape of fluids could lead to machinery failure, like brake fluid leaks leading to brake system failure in vehicles.
  • Seals around the pistons ensure no fluid escapes, maintaining operational integrity.
In summary, without proper seals, a hydraulic system would not maintain pressure, fail to operate correctly, and could pose safety risks.
Contaminant Prevention
Contaminant prevention in mechanical systems is vital for minimizing wear and tear. It's essential for the longevity and efficiency of machinery, such as roller bearings. Contaminants like dust, dirt, and water can infiltrate machinery components, causing damage or premature wear.

Seals perform essential functions in preventing contamination:
  • They block entry points to keep unwanted particles out of precision parts.
  • Well-designed seals ensure that equipment operates smoothly by protecting critical components from contaminants.
  • In roller bearings, seals are applied to the outer race, effectively covering any gaps leading into sensitive areas.
Keeping contaminants at bay ensures machinery performs at its best and reduces maintenance costs.
Pressurized Systems
Pressurized systems, such as those found in air conditioning units, rely on the containment of gas or liquid under pressure to function. Maintaining this pressure is necessary for the system's operational effectiveness. A classic example of a pressurized system is a car鈥檚 air conditioning.

Seals in pressurized systems are essential because:
  • They ensure the system retains its pressure, which is crucial for efficiency and performance.
  • Properly applied seals prevent the escape of pressurized substances, such as refrigerants in air conditioning systems.
  • Seals are located at component join points like compressors and condensers, helping maintain system integrity.
Without effective sealing, pressure would be lost leading to reduced performance and increased repair costs.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Name four types of seals used on reciprocating rods or pistons.

Name at least three kinds of elastomers that are recommended for use when exposed to cold-temperature operation.

Describe the main differences between rigid and flexible couplings as they affect the stresses in the shafts that they connect.

Describe suitable methods of sealing the sides of a piston against the inner walls of the cylinder of a hydraulic actuator.

Describe the function of a scraper or wiper on a cylinder rod.
See all solutions

Recommended explanations on Physics Textbooks

Modern Physics

Read Explanation

Physics of Motion

Read Explanation

Mechanics and Materials

Read Explanation

Magnetism

Read Explanation

Electric Charge Field and Potential

Read Explanation

Fluids

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.