Pressure relief valve - aircraft engine, Other Engineering

Assignment Help:

PRESSURE RELIEF VALVE

The pressure relief valve shown in the figure. controls the oil pressure at the pre-set value demanded by the system. The valve is normally integral with the pump assembly and protects the system from excessive pressure. It is usually a spring-loaded plate-type valve, and can on some engines provide adjustment of pressure setting.

It is more usual to find a pressure relief valve that varies the pressure with engine speed or breather pressure. These valves are usually adjustable but usually only effect the max speed oil pressure see Figure.

1832_pressure filter1.png

This type of valve uses the oil system breather pressure and an adjustable spring to balance the oil pressure in the main oil feed line to the engine bearings.

Consider Fig With the engine running, the breather pressure plus the spring push the sliding valve to the left and restrict the pump spill back to return. This is balanced by the pressure from the main feed line trying to move the slide valve to the right. Should the pressure in the main feed line fall, the breather pressure and spring will move the slide valve further to the left and restrict the oil spill still further. This will allow more oil to flow to the system, and the oil pressure in the main feed line will increase. The slide valve will then move to the right, and the oil spill to the return will be controlled by the main feed line pressure balancing the spring and breather pressure.

 


Related Discussions:- Pressure relief valve - aircraft engine

Fire precautions - fire protection engineering, Fire precautions - fire pro...

Fire precautions - fire protection engineering: Fire precautions include: Protecting escape routes in fire resisting construction, Providing fire doors between

Aaa, Let C(K) denote a European vanilla Call option with strike price K. As...

Let C(K) denote a European vanilla Call option with strike price K. Assume that all options are identical except for strike price, and strike prices satisfy (K1) What are the no-

Polymorphism, Q.  Define the polymorphism. Ans. POLYMORPHISM: It is d...

Q.  Define the polymorphism. Ans. POLYMORPHISM: It is defined as the change in atomic structure which occurs at a definite transformation temperature. The cooling diagram of

Welding techniques - plasma arc welding (paw), Plasma Arc Welding (PAW) is...

Plasma Arc Welding (PAW) is a special form of gas tungsten arc welding in which constricted plasma arc is directed at the weld area. In PAW, a tungsten electrode is contained in a

Means of escape from trains - railway inspections, Means of escape from tra...

Means of escape from trains - railway inspections: The means of  escape from  trains is also considered  in  NFPA130.     Some  of  the considerations are: At least two eme

Manual override relays, Manual override relays: When the manual-overrid...

Manual override relays: When the manual-override relays are not energised, this current flows through brushes riding on slip rings mounted on the propeller spinner bulkhead and

Bjt, why we use h for bjt

why we use h for bjt

The brayton cycle-aeronautical engineering, The brayton cycle: The work...

The brayton cycle: The working cycle of the gas turbine engine is similar to that of the four-stroke piston engine.  There is induction, compression, ignition and exhaust in bo

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd