The jacking oil pump 3 is used to pressurize the bear ings with high pressure and causes the turbine shaft slightly the bearing race. When it comes to jacking systems rexroth develops drive and control systems for various jacking system types and sizes, which are used in numerous self elevating platforms seps such as jackp rigs, jack up vessels and jack up barges. The lubricating oil passes through oil cooler, before can be supplied to the bearing under emergency, lube oil can be supplied by a dc oil pump. The double edged sword of jacking oil system pioneer. The major concern caused by too high pressure oflubricating orjack ing oil is that it,increases the risk of system overpressure failure if the reliefvalves failed to operate. If you think closely than you will understand that these kind of systems are generally used in high power capacity turbines as with capacity the alternators rotor shaft weight is. Jacking oil pump shall be part of the jacking oil system which has following function. Bosch rexroth meets the latest demands with state of the art solutions for the total drive system, related controls and the mechanical components. Reduces the break away torque during runup of the steam turbine rotor. This page contains technical data sheet, documents library and links to offering related to this product. Enhancing reliability and efficiency jacking control system. Jackingoil pockets are applied in many journals and thrust bearing applications in order to provide a hydrostatic oil film force that ensures a wear free runup following a successful liftoff procedure. Features of your vehicle notice smart key immobilizer system to deactivate the immobilizer system. When the piston in the pump is pushed downward, oil will be directed past a second check ball into the cylinder.
Low oil level light your engine is equipped with an oil level monitoring system. The turning gear pump and the jacking oil pump are driven by one common ac motor. When starting the engine, do not use your vehicle is equipped with an turn the engine startstop button to the key with other immobilizer keys electronic engine immobilizer system the on position by pressing the but around. Abbs jacking control system jcs is an advanced vfd control system, which consists of variable speed drives and controls. However, all components of the jackingoil system have to be carefully designed in order to limit costs and prevent significant disturbance of hydrodynamic operation after deactivation of. Using a prolube designed oil circulating and jacking system extends the life of the bearings or gears, reduces the number of plant shutdowns for maintenance and increases the time between oil changes. On some designs the turning gear is provided with a separate jacking oil pump. A wide variety of jacking oil pump options are available to you, such as hydraulic.
Currently, tsc is one the worldwide first tier jacking system manufacturers globally recognized. Oil from the reservoir is drawn past a check ball into the piston type pump during the pistons upstroke. Cylinder integrated measuring system cims the jacking cylinders are equipped with cims ceramic integrated measuring system, which provides a most accurate signal required by the control system to evaluate the status of the system in relation to the precision, motion pattern and levelling of the vessel or platform. Tank jacking procedure oil storage tank installation guide. Large framesized turbines found in utility scale steam combustion and combined cycle power plants use highpressure hydraulic oil pumps to lift the turbine shaft from its sleeve bearings before the turbine is started. When the ignition key is turned on, the low oil light will come on briefly.
A jacking oil pump also called a lift pump is commonly used on rotor shafts of steam driven turbine generators prior to startup or after shutdown to provide even cooling of the shaft and eliminate. Its design principle is to provide simple, familiar controls for safety and ease of operation. Jacking oil pump comes in operation in conjunction with the. The same oil is also supplied to bearings for lifting the turbine and generator rotors to a small extent during startup or rotor barring operation. China synchronized lifting jacks, hydraulic hose press. The system is designed to combine speed and precise control 8008217320 process, which on a large component can require 70 lbs. However, all components of the jacking oil system have to be carefully designed in order to limit costs and prevent significant disturbance of hydrodynamic operation after deactivation of. But as with any critical system, great care must be taken to insure its integrity.
The jacking oil pump is generally a reciprocating plunger type pump and supplies the bearings through individual lines from the pump to each bearing. Jacking oil system bearing mechanical lubricant scribd. Field erected tanks api cantoni system innovative method. Turning gear operation without jacking oil switched on is not allowed, because the bearings can be damaged due to insufficient lubrication. The key advantages of a vfd driven jacking system include controlled startup operations and accurate and precise speed control, resulting in improved efficiency. Jacking method is a kind of storage tank installation method that refers to the bottom of storage tank as the reference plane, the wall in the top of the storage tank and the tank roof will be installed firstly, then assemble and weld the storage tank wall from top to the bottom of the storage tank until the installation of tank bottom is completed.
Abb jacking control system abbs jacking control system is based on advanced 800xa control platform, which provides the operators with the information needed for jacking control and system maintenance. View and download buick 2000 century owners manual online. Oil supply a single oil supply line lubricates and cools the bearing, governs the mc and operates the hydraulic actuators and safety and protective devices. Lifting of the turbine shaft system for startup and assisting the hydraulic turning gear or manual barring operation for overcoming the huge momentum while starting from standstill. This prevents wear on the bearings and also reduces the starting torque required. A fixed orifice bypassed with a valve giving a variable orifice effect, is used in this line to reduce the flow to the proper amount. Find jacking oil pump steam turbines related suppliers, manufacturers, products and specifications on globalspec a trusted source of jacking oil pump steam turbines information. Does any turbine exist that have no jacking oil system. Cylinder integrated measuring system cims the jacking cylinders are equipped with cims ceramic integrated measuring system, which provides a most accurate signal required by the control system to evaluate the status of the system in relation to the precision, motion pattern and levelling of. Yes, there are turbines which are not having a jacking oil system. Approval issue course 234 turbine and auxiliaries module 10 stressed that these consequences. Integrate and develop a complete set of technologies on an integrated system. The market for wind energy puts challenging additional demands on traditional jacking systems for installation and maintenance vessels, and platforms.
However, all components of the jackingoil system have to be carefully designed in. This pump is a motordriven, positive displacement, twoshaft gear pump. Jetlube jacking system grease ecf is designed to lubricate a wide array of heavily loaded gear applications. Two 2 jacking oil injection blocks for generator bearings.
Until the turbine shaft speed is capable of sustaining an adequate bearing oil wedge above 200 rmin, the jacking oil system and the normal lubricating oil system are run in parallel. Until the turbine shaft speed is capable of sustaining an adequate bearing oil wedge above 200 rmin, the jacking oil system and the normal lubricating oil system are run in. Capacity mm stands for multimatic tchs truck component handling system. The following protective aetlons listed in the orderofdropping pres. Low jacking oil pressure can damageturbine generator bearings when turbine speed is toolow for adequate hydrodynamic lubrication. Tsc can offer jacking system used for the most jackups in the world. The jacks are interconnected hydraulically to ensure that the thrust from each is the same. The jacking oil system performs the following purposes. If required, fire screen, safety barrier is also erected around the tank. Control and oil system lubrication system the oil supplied to the lubrication system as noted above passes through the oil cooler and thence to the main bearings, thrust bearings and turning gear. Winter discount 10% in november, 8% in december, and 6% in january.
The double edged sword of jacking oil system pioneer the. This pump is generally used only for large turbinegenerators, and then only during the period when the shaft is rotated by the turning gear. Jacking for maintenance may 0114 figure jacking for maintenance jacking point locations may 0115 figure jacking for maintenance forward jacking point may 0114 l. The tank under maintenance is first gas freed, piping connections dismantled, checked and certified by the engineerincharge. The number of jacks used may vary because of the pipe size, the strength of the jacking pipes, the length to be installed and the anticipated frictional resistance. If you require any other information, please contact us using form located at the bottom of the page.
Dnvglrp0075 inspection and maintenance of jacking systems. The pulse width synchronous control system is a hydraulic jacking system, industrial computer plc control technology, displacement monitoring and bridge structure analysis and construction technology. Bearing insert oil jacking pump is started automatically, if the rotor. St39007 jacking oil pump11 bharat heavy electricals.
Oil purification system during operation, the lubricating. In both circumstances the jacking oil system provides high pressure oil to the base of the bearing and floats the rotors on a film of oil. Before the turbine is turned or barred, jacking oil pump 2 nos. The jacking oil system and the turning gear system belong to the same function group controller. Jul 04, 2015 the jacking oil system and the turning gear system belong to the same function group controller. Too high oil pressure increases the risk ofoverpressure failure in the lube oil system. Jacking oil pockets are applied in many journals and thrust bearing applications in order to provide a hydrostatic oil film force that ensures a wear free runup following a successful liftoff procedure. High pressure jacking oil systems typically consist of motor driven hydraulic pumps, high pressure filters, and a distribution system that directs the oil into the portion of the bearing at the highest load point of each thrust shoe. The bainter center ring support and rolling stairway system will make building your bin roofs easier and safer.
A fixed orifice bypassed with a valve giving a variable orifice effect, is. Rev 3716 mm2000 mm2000s mm2000 ah mm2000ahs 2,206 lb. An introduction to pipe jacking and microtunnelling. Subscribe to our newsletter and stay up to date with the latest updates and documents. When the rotor speed falls to a predetermined low value, put the rotor on turning gear manually or turning gear may. Jacking something we hear regular in purpose something like lifting. Stack systems for platform, jack up or land applications. Its design principle is to provide simple, familiar controls for safety and ease of. Heavy duty center roof support towers also available. The jacking concept was correctedby a higher flow oil pump. It can also be used on slides, jacking systems, cantilever type rigs and assemblies, nuts, bolts, and a wide range of other applications making jacking system grease ecf a nearly universal product. Prevents metal to metal contact in the journal bearings by producing a hydrostatic oil film when the rotational shaft speed is too low to create a continuous hydrodynamic oil film. When the rotor speed falls to a predetermined low value, put the rotor on turning gear manually or turning gear may cutin automatically.
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