Industrial Machinery Repair Part 12 ppt

... of the rotating impeller impart a radial and rotary motion to the liquid, forcing it to the outer periphery of the pump casing, where it is collected in the outer part of the pump casing called ... inch clearance. Care should be taken to avoid getting the collar cocked. ● Install the rotary unit parts on the shaft or sleeve in the proper order. ● Be careful when passing the seal gland ring...

Ngày tải lên: 11/08/2014, 08:22

... found in machinery. Helical gears also have a preload by design; the critical force to be considered, however, is the thrust load (axial) generated in normal operation; see Figure 14 .12. TF = 126 ,000 ... cycle. Preventive maintenance allows a maintenance department to control a hydraulic system rather than the system controlling the maintenance depart- ment. We must control a hydraulic s...

Ngày tải lên: 11/08/2014, 08:22

Ngày tải lên: 11/08/2014, 08:22

... lubrication system to provide a uniform oil film between closely fitting parts (e.g., piston rings and the cylinder wall). Partial or complete failure of the lube system results in catastrophic ... the valve. This feature, coupled with the turbulent flow generated when the ball opening is only partially open, limits the use of the ball valve. Use should be limited to strictly an “on-off” ... ope...

Ngày tải lên: 05/08/2014, 11:20

... side Dust discharge Figure 12. 1 A typical baghouse For continuous operation, the filter must be constructed with multiple compartments. This is necessary so that individual compartments can be sequentially ... cyclones rely on centrifugal force to separate particulates from the air or gas stream, particle mass is the dominant factor that controls effi- ciency. For particulates with high densi...

Ngày tải lên: 05/08/2014, 11:20

... 10.83 784 11.84 727 9.01 738 9.53 760 10.58 782 11.63 803 12. 69 748 9.78 759 10.30 780 11.35 801 12. 46 822 13.57 770 10.60 780 11.13 800 12. 20 821 13.35 841 14.49 most of the fabricated bases is ... fan. Excessive moisture and particulates have an extremely negative impact on fan performance and cause two major problems: abrasion or tip wear and plate-out. High concentrations of particu...

Ngày tải lên: 05/08/2014, 11:20

... diameter in inches × drive shaft rpm Driven sheave diameter Driven shaft rpm = 6 × 1800 12 900 = 6 × 1800 12 Now we understand how changing the size of a sheave will also change the shaft speed. ... steam quality may increase the amount of particulate matter present in the con- densate. High concentrations of solids directly affect the performance of steam traps. If particulate matter is...

Ngày tải lên: 05/08/2014, 11:20

... Ricky. Industrial machinery repair : best maintenance practices pocket guide / Ricky Smith and Keith Mobley. p. cm. ISBN 0-7506-7621-3 (pbk : alk. paper) 1. Machinery Maintenance and repair. 2. Industrial ... Ricky. Industrial machinery repair : best maintenance practices pocket guide / Ricky Smith and Keith Mobley. p. cm. ISBN 0-7506-7621-3 (pbk : alk. paper) 1. Machinery Ma...

Ngày tải lên: 05/08/2014, 11:20

... Assessment 33 C. Controls the level of foaming. D. Prevents the lubricant from mixing with metal particles. 12 As a mechanic, you observe that a machine bearing is extremely hot and becoming discolored ... standards; Introduction: Why Use Best Maintenance Repair Practices? 9 ● The maintenance manager needs to conduct monthly spot checks on randomly selected PMs and repairs for quality ass...

Ngày tải lên: 05/08/2014, 11:20

... and roller. 2 Bearings: A. Are found in machines with moving parts. B. Function as guides. C. Help reduce the friction between moving parts. D. All of the above. 38 Maintenance Skills Assessment C. ... All equipment and machinery should be securely placed, and anchored when necessary, to prevent tipping or other movement that could result in damage or personal injury. Most machinery shoul...

Ngày tải lên: 05/08/2014, 11:20