Find the setting on the counterbalance valve

Reference no: EM131810776

Question: The stroke of the cylinders in Problem is 18 ft. The design states that the truck must be lowered in 10 min. The counterbalance valve is a cartridge mounted in an aluminum block known as a line body. Total mass of the counterbalance valve is 9.4 lb. The pressure setting of the valve (inlet pressure) is 2200 psi, and the pressure drop from the outlet to the reservoir is 50 psi. Use the following assumptions and calculate the temperature rise of the counterbalance valve during a retraction event.

a. The valve is mounted on the cylinder. 20% of the total heat generated is conducted to the cylinder.

b. 40% of the total heat generated is exchanged to the oil as it passes through the valve.

c. 30% of the total heat is convected or radiated to the surrounding atmosphere during the event.

Problem: A peanut shelling plant uses a truck dump to unload truck-trailers loaded with peanuts. The truck is backed onto a platform, and the entire vehicle (tractor and trailer) is raised to pour the peanuts out through the back unloading gate. The hose on the cap end of one lift cylinder failed at the fitting, and this caused the entire load to be held by the other cylinder. The resulting high pressure caused the hose on this cylinder to burst, and a $105,000 truck was destroyed. You are assigned the task of redesigning the hydraulic circuit such that a similar accident could never happen again. Your circuit is shown in Fig. A counterbalance valve is installed directly on the cap end port of the cylinder. There is no line (hose or hydraulic tubing) between the port and the valve. For simplicity, there is only one cylinder shown. The actual design has two cylinders with a counterbalance valve on each one.

Given: Cylinders 8-in. bore

5-in. rod diameter

Maximum lift force 10 tons

a. Find the setting on the counterbalance valve (psi) that will ensure that the load can never fall. Valve setting should be 10% higher than the pressure produced by the expected maximum load.

b. What pressure must be developed at the rod end of the cylinder to lower the load?

Reference no: EM131810776

Questions Cloud

Calculate and plot volumetric efficiency vs pressure : A manufacturer gives the data shown in Table for a gerlor type gear motor. The motor has a displacement of 4.9 in3/rev.

Calculate its value considering each case independently : The amount of a loan is $ 15,000 that expires in 12 months at a rate of 16%, Calculate its value considering each case independently

Name the three major types of membrane lipids : Name the three major types of membrane lipids in animal cells and provide a specific example of "everyday biochemistry"

What is the present value of these payments : You win a lottery ticket with a prize of $1.5 million. What is the present value of these payments

Find the setting on the counterbalance valve : Find the setting on the counterbalance valve (psi) that will ensure that the load can never fall. Valve setting should be 10% higher than the pressure produced.

Compute the portfolio expected return and portfolio risk : Compute the portfolio expected return and portfolio risk if you put $ 300 in the corporate bond fund and $ 700 in the common stock fund.

What was the firm operating cash flow or OCF : The 2014 balance sheet of Jordan’s Golf Shop, Inc., showed long-term debt of $6.2 million, What was the firm’s 2015 operating cash flow, or OCF?

Portfolio be after the purchase of syngine stock : What will the expected return and beta on the portfolio be after the purchase of the Syngine stock?

Calculate the commercial interest : Calculate the commercial interest of

User Account

All Pages