Full journal bearing
A full journal bearing of length 45 mm and L/d=1 has been scored due to dirty oil.The surface roughness of the bearing increases due to dirty oil and causes to increase the viscosity of the oil by 10% due to the working environment. Decide, whether the bearing is to be replaced based on the criterion that 5% increase in power loss justifies the replacement.consider the radial load 940 N, speed= 3000 rpm, radial clearance= 0.02mm.SAE 10 oil is to be used and the operating temperature is limited to 60° C
Homework Answers
Request Answer!
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
A 3-in.-diameter shaft is supported by a bearing 3 in. in length with a diametral clearance...
A 3-in.-diameter shaft is supported by a bearing 3 in. in length with a diametral clearance of 0.004 in. It is lubricated by oil that at operating temperature has a viscosity of 5 ureyn. The shaft rotates at 1800 rpm and carries a radial load of 1200 lb. Estimate the bearing coefficient of friction and the power loss using the Petroff approach.
3. A 100 mm diameter shaft is supported by a bearing 50 mm long with a...
3. A 100 mm diameter shaft is supported by a bearing 50 mm long with a minimum oil-film thickness of 0.02 mm and radial clearance of 0.06 mm. It is lubricated by SAE 30 oil. The bearing carries a load of 4 kN of at 900 rpm. Employing the design charts, determine The temperature of the oil film • • The coefficient of friction • The friction power
13.20 (33 points) A 3-in.-diameter shaft is supported by a bearing 3 in. in length with...
13.20 (33 points) A 3-in.-diameter shaft is supported by a bearing 3 in. in length with a diametral clearance of 0.004 in. It is lubricated by oil that at operating temperature has a viscosity of 5 ureyn. The shaft rotates at 1800 rpm and carries a radial load of 1200 lb. Estimate the bearing coefficient of friction and the power loss using the Petroff approach.
A 50 mm diameter pressure fed journal bearing is operating at 50 rev/s under a load...
A 50 mm diameter pressure fed journal bearing is operating at 50 rev/s under a load of 5 kN giving a projected unit load of 2 MPa. Half journal length is l' = 25 mm, and radial clearance is c = 25 microns. Oil inlet temperature is maintained at 30 °C and average temperature is to be kept at 70°C. Viscosity of the oil used is then 12 mPa.s. What is the minimum required supply pressure [kPa] that maintains this...
Assume Kr 1 and Ka In a journal bearing assembly, the shaft has a diameter of 88.900 mm and a bilateral tolerance of + 0.076 mm. The bushing bore diameter is 89.027 mm with a unilateral toleran...
Assume Kr 1 and Ka In a journal bearing assembly, the shaft has a diameter of 88.900 mm and a bilateral tolerance of + 0.076 mm. The bushing bore diameter is 89.027 mm with a unilateral tolerance of +0:0.119 mm. The bushing length is 50 mm. The SAE 30 oil has an average operating temperature 60°C. For a minimum radial clearance, a speed of 1000 rev/min, and a radial load of 20 kN, find the maximum bearing pressure and its...
The shown values are incorrect 2 out of 3 attem A full journal bearing has a...
The shown values are incorrect
2 out of 3 attem A full journal bearing has a shaft journal diameter of 25 mm with a unilateral tolerance of -0.01 mm. The bushing bore has a diameter of 25.04 mm with a unilateral tolerance of 0.03 mm. Thelid ratio is unity. The bushing load is 1.05 kN, and the journal rotates at 1,200 rev/min. Analyze the minimum clearance assembly if the average viscosity is 50 mPa.s to fin the minimum oil film...
2. A shaft carrying a 10KN load is supported by two identical plain journal bearings. The shaft, which normally rotates at 3000 rev/min has, at the bearing region, a nominal diameter of 50 mm and a l...
2. A shaft carrying a 10KN load is supported by two identical plain journal bearings. The shaft, which normally rotates at 3000 rev/min has, at the bearing region, a nominal diameter of 50 mm and a length of 16 mm. Starting with a radial clearance ratio of 0.0015 and neglecting thermal effects a) Calculate the temperature of the lubricant which will produce an eccentricity ratio of 0.7 if the oil used is SAE10 b) Comment of the necessity to supply...
please explain to me step by step 4.21 A bearing is required to provide axial location and support a radial load of 940 N for a shaft of 17 mm nominal diameter spinning at 570rpm The desired life...
please explain to me step by step
4.21 A bearing is required to provide axial location and support a radial load of 940 N for a shaft of 17 mm nominal diameter spinning at 570rpm The desired life is 10 years continuous operation From the limited range available in Tables 4.7 to 4.9, select and specify an appropriate bearing justifying the choice 4.22 A bearing is required to support an equivalen radial load of 1290 N. The nominal diameter of...
Problem 2: A pressure-fed bearing has a journal diameter of 50.00 mm. The length of the...
Problem 2: A pressure-fed bearing has a journal diameter of 50.00 mm. The length of the bearing is 55 mm with a 5 mm wide central annular groove. The bearing is fed by SAE 30 oil at 200 kPa supply gauge pressure. The journal speed is 2880 rev/min carrying a load of 10 kN. Use a minimum clearance of 0.042 mm and an average oil film temperature of 85°C to perform a design assessment using Trumpler's criteria.
2. A shaft carrying a 10KN load is supported by two identical plain journal bearings. The shaft, which normally rotates...
2. A shaft carrying a 10KN load is supported by two identical plain journal bearings. The shaft, which normally rotates at 3000 rev/min has, at the bearing region, a nominal diameter of 50 mm and a length of 16 mm. Starting with a radial clearance ratio of 0.0015 and neglecting thermal effects a) Calculate the temperature of the lubricant which will produce an eccentricity ratio of 0.7 if the oil used is SAE10 b) Comment of the necessity to supply...
A 3-in.-diameter shaft is supported by a bearing 3 in. in length with a diametral clearance of 0.004 in. It is lubricated by oil that at operating temperature has a viscosity of 5 ureyn. The shaft rotates at 1800 rpm and carries a radial load of 1200 lb. Estimate the bearing coefficient of friction and the power loss using the Petroff approach.
3. A 100 mm diameter shaft is supported by a bearing 50 mm long with a minimum oil-film thickness of 0.02 mm and radial clearance of 0.06 mm. It is lubricated by SAE 30 oil. The bearing carries a load of 4 kN of at 900 rpm. Employing the design charts, determine The temperature of the oil film • • The coefficient of friction • The friction power
13.20 (33 points) A 3-in.-diameter shaft is supported by a bearing 3 in. in length with a diametral clearance of 0.004 in. It is lubricated by oil that at operating temperature has a viscosity of 5 ureyn. The shaft rotates at 1800 rpm and carries a radial load of 1200 lb. Estimate the bearing coefficient of friction and the power loss using the Petroff approach.
A 50 mm diameter pressure fed journal bearing is operating at 50 rev/s under a load of 5 kN giving a projected unit load of 2 MPa. Half journal length is l' = 25 mm, and radial clearance is c = 25 microns. Oil inlet temperature is maintained at 30 °C and average temperature is to be kept at 70°C. Viscosity of the oil used is then 12 mPa.s. What is the minimum required supply pressure [kPa] that maintains this...
Assume Kr 1 and Ka In a journal bearing assembly, the shaft has a diameter of 88.900 mm and a bilateral tolerance of + 0.076 mm. The bushing bore diameter is 89.027 mm with a unilateral tolerance of +0:0.119 mm. The bushing length is 50 mm. The SAE 30 oil has an average operating temperature 60°C. For a minimum radial clearance, a speed of 1000 rev/min, and a radial load of 20 kN, find the maximum bearing pressure and its...
The shown values are incorrect
2 out of 3 attem A full journal bearing has a shaft journal diameter of 25 mm with a unilateral tolerance of -0.01 mm. The bushing bore has a diameter of 25.04 mm with a unilateral tolerance of 0.03 mm. Thelid ratio is unity. The bushing load is 1.05 kN, and the journal rotates at 1,200 rev/min. Analyze the minimum clearance assembly if the average viscosity is 50 mPa.s to fin the minimum oil film...
2. A shaft carrying a 10KN load is supported by two identical plain journal bearings. The shaft, which normally rotates at 3000 rev/min has, at the bearing region, a nominal diameter of 50 mm and a length of 16 mm. Starting with a radial clearance ratio of 0.0015 and neglecting thermal effects a) Calculate the temperature of the lubricant which will produce an eccentricity ratio of 0.7 if the oil used is SAE10 b) Comment of the necessity to supply...
please explain to me step by step
4.21 A bearing is required to provide axial location and support a radial load of 940 N for a shaft of 17 mm nominal diameter spinning at 570rpm The desired life is 10 years continuous operation From the limited range available in Tables 4.7 to 4.9, select and specify an appropriate bearing justifying the choice 4.22 A bearing is required to support an equivalen radial load of 1290 N. The nominal diameter of...
Problem 2: A pressure-fed bearing has a journal diameter of 50.00 mm. The length of the bearing is 55 mm with a 5 mm wide central annular groove. The bearing is fed by SAE 30 oil at 200 kPa supply gauge pressure. The journal speed is 2880 rev/min carrying a load of 10 kN. Use a minimum clearance of 0.042 mm and an average oil film temperature of 85°C to perform a design assessment using Trumpler's criteria.
2. A shaft carrying a 10KN load is supported by two identical plain journal bearings. The shaft, which normally rotates at 3000 rev/min has, at the bearing region, a nominal diameter of 50 mm and a length of 16 mm. Starting with a radial clearance ratio of 0.0015 and neglecting thermal effects a) Calculate the temperature of the lubricant which will produce an eccentricity ratio of 0.7 if the oil used is SAE10 b) Comment of the necessity to supply...
Most questions answered within 3 hours.
-
Which statement is always true: The total energy of a closed
system...
A) is always equally...
asked 9 minutes ago -
find the critical value associated with a right sided hypothesis of
the mean using a sample...
asked 2 hours ago -
Which of the following statements is true with respect to a
simple linear regression model?
a....
asked 2 hours ago -
The energy required to remove an electron from a surface of a
solid element is called...
asked 4 hours ago -
How would you train your employees to avoid risks of using
mobile devices?
asked 4 hours ago -
Assume Kw = 1.01 ✕ 10−14
For pure water, we can calculate [H3O+ ] = [OH...
asked 5 hours ago -
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 6 hours ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 6 hours ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 8 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 8 hours ago -
The area of an elastic circular loop decreases at a constant
rate, dA/dt = −6.60×10−3 m2/s...
asked 9 hours ago -
The denaturation of proteins can be described by the
equilibrium
F⇌U
where F and U represent...
asked 11 hours ago