maintenance and repair of machinery components

... INSTALLATION, MAINTENANCE, AND REPAIR OF SURFACE SAFETY VALVES AND UNDERWATER SAFETY VALVES OFFSHORE 3 I 5.2 OFFSITE 5.2.1 For continued assurance of quality, an offsite repair REPAIR OF SSVsAJSVs ... Installation, Maintenance, and Repair of Surface Safety Valves and Underwater Safety Valves Offshore 1.1 One of the means of assuring positive wellstream shut- off is the use of the wellhead ... 4 INSTALLATION AND MAINTENANCE 2 5 REPAIR 2 5.1 Onsite Repairs of SSVs/USVs 2 5.2 Offsite Repair of SSVsNSVs 3 6 TESTING PROCEDURES 3 6.1 Periodic SSV Operating and Pressure Holding

Ngày tải lên: 09/12/2018, 11:57

... with Machinery Initial Tasks Prior to Machinery Commissioning • Align machinery without pipe attached • Adjust pipe for proper fit-up and make connection 150 Machinery Component Maintenance and Repair ... expan-Effects of Support, Anchor, and Terminal Movements • Thermal expansion of equipment • Settlement of equipment foundations and/or piping supports The When, Who, What, and How of Removing Spring ... blown free of dustand concrete chips using oil- and water-free compressed air from an approved source Concrete surface can also be vacuumed 142 Machinery Component Maintenance and Repair Trang

Ngày tải lên: 05/08/2014, 12:20

... end pressure, and residual gasketloads 166 Machinery Component Maintenance and Repair Trang 3A difference in the coefficient of thermal expansion between the rials of the flange and the bolts ... OD is equal to the outer diameter of the raised face Trang 4168 Machinery Component Maintenance and RepairFigure 4-7 Gasket factors “M” and “Y.” Trang 5Process Machinery Piping 169Figure 4-8 Effective ... joints in services in excess of 500°F and in sizes above six in in Wm1 = [p(P)(G 2 )/4] + [2(B 1 )( p)(G)(M)(P)] Wm2 = p(B 1 )(G)(Y) 170 Machinery Component Maintenance and Repair Trang 8Table 4-5

Ngày tải lên: 05/08/2014, 12:20

... prevent the attainment and retention of good alignment Here is a list of such items and questions to ask oneself: 200 Machinery Component Maintenance and Repair Figure 5-1 Machinery damage caused ... Machinery Component Maintenance and RepairTrang 2Appendix 4-B Specifications for Cleaning Mechanical Seal Pots and Piping for Centrifugal Pumps191 Trang 3192 Machinery Component Maintenance and ... advantages: Machinery Alignment 205 Trang 17206 Machinery Component Maintenance and RepairFigure 5-3 Two-indicator face-and-rim alignment method. Figure 5-4 Three-indicator face-and-rim alignment

Ngày tải lên: 05/08/2014, 12:20

... care of shaft sag For initial leveling of largeturbogenerators, etc., especially if using precision optical equipment, shaftsag must be considered Manufacturers of such machines know this, andprovide ... mis-alignment is not present, and if coupling and/or shaft diameters are large,which is usually the case, accuracy will often be adequate If, however,major misalignment exists, and/or the rim or shaft ... 5-15 and 5-16 This error can usually be recognized by repeated failure of bottom (T + B) readings to equal side-plus-side (S + S) readings within Trang 5top-plus-one or two thousandths of an

Ngày tải lên: 05/08/2014, 12:20

... give an indication of the credulity of the person who orders it done In the time required to get a set of surements by this method, most of the thermal growth and all of the torqueand hydraulic effect ... majority of electric motor driven pumps Zero-zero has the further advantage of simplicity, and of being the best starting point when direction of growth align-is unknown Piping align-is often the ... methodmakes use of the precise tilting level and jig transit, with optical microm-eter and various accessories By referencing measurements to fixed ele-vations or lines of sight, movement of machine

Ngày tải lên: 05/08/2014, 12:20

... mass m of 1 oz near one end at a radius r of 10 in.Under these conditions the displacement of the center-of-gravity (e) nolonger equals the displacement of the shaft axis (d) in the plane of thebearing ... apexes at the center-of-gravity of the rotor.The effect of combining these two types of unbalance when they occur inthe same axial plane (quasi-static unbalance) is to move the apex of thecones away ... there are large vibrationamplitudes and the angle of lag changes rapidly As the speed is increased sup-Figure 6-8 Angle of lag and migration of axis of rotation. Trang 6further, vibration subsides

Ngày tải lên: 05/08/2014, 12:20

... exceeding one-quarter of the permissible residual unbalance Rotors driven by belt shouldnot drive components of the balancing machine by means of any mechani-cal connection The use of electrical means ... rotor’s polar moment of inertia (Wk2) is found by multiplying therotor weight (W) in pounds by the square of the radius-of-gyration (k) infeet The radius-of-gyration is the average of the radii from ... locateeccentrically, i.e., offset from the shaft axis of the workpiece 2 Maintain close tolerances on fit dimensions between end-driveadapter and workpiece, and between adapter and balancing machinedrive

Ngày tải lên: 05/08/2014, 12:20

... requirements Parts of crushing machinery Parts of agricultural machinery Individual components of engines (gasoline or diesel) for cars, trucks and locomotives Crank-shaft-drives of engines with ... Machinery Component Maintenance and Repair Trang 5machine pass the test A similar procedure has been used by the SAE for more than ten years and has proven itself to be practical and foolproof.The ... than 1/3of the bearingspan and for rotors with two correction planes outboard of one bearing, it is often advisable to measure unbalance and state the tolerance in terms of (quasi-) static and couple

Ngày tải lên: 05/08/2014, 12:20

... leads to considerable ical vibration and to the excitation of mounting and machine resonances.Both of these factors can lead to damage of the machine and physical andpsychological strain on the operating ... amount and angle of unbalance can be measured under specified conditions 351 Trang 13machine’s ability to sense and indicate a minimum amount of unbalancein terms of selected components of the ... Berlin 11 Muster, Douglas and Stadelbauer, Douglas G.: Balancing of Rotating Machinery, Shock and Vibration Handbook, second edition, McGraw-Hill, New York (1976) Trang 11Machinery, The Vibration

Ngày tải lên: 05/08/2014, 12:20

... Critical Speeds of Solid andHollow Shafts 366 Trang 3Part III Maintenance and Repair of MachineryComponents Trang 5Chapter 7 Ball Bearing Maintenanceand Replacement The fundamental purpose of a bearing ... correcttype and size of bearings and properly applying the bearings in the equip-ment However, maintenance of the machine is the responsibility of theuser A well-planned and systematic maintenance ... Committee (ABEC) of the Anti-Friction Bearing Manufac-turers Association (AFBMA) These standards have also been approved by the American Standards Association (ASA) and the International Standards Organization

Ngày tải lên: 05/08/2014, 12:20

... distortion of the inner ringwhen forced against off-square shoulder An off-square bearing shortensbearing life Some of these conditions can be corrected when repairs are made onthe inner ring seat of ... corrosion Center holes of the shaft must also be ofsufficient size, clean and smooth, and free from nicks Be sure to removeparticles of foreign matter that could change the centering of the shaft onthe ... by hand, a check is obtained on all points of the shaft which the indicator contacts (Figure 7-29) Another method of measuring out-of-round is the three-point methodusing a set of V-blocks and

Ngày tải lên: 05/08/2014, 12:20

... outer ring faces of DB and DF pairs of bearings duplexed for preload is shown in Figures 7-49 and 7-50 Notethe gap between the inner rings of the DB pair and the outer rings of the DF pair This ... between the inner and outer ring faces A special grinding procedurecreates an offset between the faces of the inner and outer rings of thebearing equal to the axial deflection of the bearing under ... 7000 series bearings. Trang 4the purpose of obtaining greater axial and radial rigidity By careful tion of bearing type and amount of preload, axial and radial deflectionrates best suited to

Ngày tải lên: 05/08/2014, 12:20

... 7Table 7-6 Bearing Maintenance Checklist—cont’dTrang 8Chapter 8Repair and Maintenance of Rotating Equipment Components Pump Repair and Maintenance* Sealing performance, bearing, and seal life will ... gaskets,can damage these fits and make concentricity of shaft and housing Figure 8-4 Checking for run-out. Trang 12Repair and Maintenance of Rotating Equipment Components 451Figure 8-5 Checking ... register can interfere with the piloting and centering of the sealcomponents and alter the hydraulic loading of the seal faces, result-ing in reduction of seal life and performance To measure chamber-bore

Ngày tải lên: 05/08/2014, 12:20

... question of how torepair damaged journals, seal areas, and general geometry of high speedturbomachinery shafts We will mainly focus on centrifugal compressorand turbine rotor shafts in excess of 3,600 ... experience and skill of the repair orga-nization is of the utmost importance: Soft or medium grinding wheelsshould be applied at the highest possible, but safe speeds Coolant must be continuous and ... feasible.post-Outlook and Conclusions 1 The possibility of using a low temperature stress relief of 600° to800°F (315° to 425°C) for several hours has been considered for theimpeller and wear ring repairs;

Ngày tải lên: 05/08/2014, 12:20

... Proper installation and maintenance of oil filters and mechanical operation of the engine are equally important for treatment of oil Prevention of contamination and removal of contaminants should ... fireproof and constructed of poured concrete or concrete and cinder blocks with a roof of reinforced concrete, steel, or wood supports with slate or other fireproof shingles Ventilation and openings ... absorption of oils and solvents, and to promote cleanliness and ease of cleanup Plates and gratings covering floor trenches must be grounded Rubber matting should be installed in front of and around...

Ngày tải lên: 05/03/2014, 18:20

... smoothness and absence of scratches and nicks (d) Camshaft cams and cam faces for worn or deformed condition; journal surfaces and bearings for highly polished condition and absence of scratches, ... condition and absence of scratches, nicks, cracks, and deformation (f) Pistons for cracks and warped condition; verify pistons, rings, and pins comply with manufacturer’s requirements; and rings and ... proper amount of fuel to sustain operation System components include filters, a fuel manifold, fuel tubes, and nozzles Off-engine components include the fuel control equipment and a supply system...

Ngày tải lên: 12/08/2014, 16:21

... alternating characteristics of the current The generated voltage is proportional to the strength of the magnetic field, the number of coils (and number of windings of each coil), and the speed at which ... number of windings Similarly, the rotor consists of a specific number of field poles, each with a specific number of windings In addition to the rotor and stator (refer to paragraphs 4-6b and 4-6c, ... 120/240 volts, load 1,0 and load 2,0 would consist of 120-volt lamps and 120-volt singlephase power equipment Load 1,2 would consist of 240-volt power equipment Two voltmeters and two TM 5-685/NAVFAC...

Ngày tải lên: 12/08/2014, 16:21

... level of fault current Most units function as overcurrent trip devices and consist of a solenoid tripper and solid-state components The solid-state components are part of the power sensor and provide ... readings and result in inaccurate data, damage and injury All conductors and terminations should carry identification that matches schematics, diagrams and plans used for construction and maintenance ... end of the shaft is supported by the coupling to the prime mover and one bearing is used at the other end The selections of bearing type and lubrication are based on generator size, type of coupling...

Ngày tải lên: 12/08/2014, 16:21

... barriers; clean off smoke and dust Repair moderate damage to bushing insulation by sanding smooth and refinishing with a clear insulating varnish Inspect alignment and condition of movable and stationary ... consist of three functional elements: main contacts to connect and disconnect the load to and from the sources of power; sensing circuits to constantly monitor the condition of the power source and ... operation of the system or equipment is observed Maintenance personnel must then refer to records for interpretation and comparison of performance data (i.e., log sheets) Comparisons of operation...

Ngày tải lên: 12/08/2014, 16:21