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Discussion on the two-spindle alignment of diesel generator sets for oil mechanical drilling rigs Zhi Zhihong Cheng Zhiqiang Li Baosen Jianghan Machinery Research Institute South Diesel Engine Factory is parallel. When. Catch, squat, line the same; the disc is empty, the wealth is ridiculous, the magic machine, the position, the spindle axis, the shooting, the blessing, the loose machine says Ke, the time will adjust the axis of the generator spindle axis. This alignment method is also applicable to shaft alignment of other machines.
The main word diesel engine generator main shaft alignment step in the diesel engine generator set of the drilling machine, the diesel engine and the generator are all connected by the elastic pin pin take-up device. However, the elastic pin coupling has the ability to properly compensate the relative displacement of the two axes, but if the relative displacement of the two spindle axes of the diesel engine and the generator exceeds the specified value of 1, the unit is working. Not only does it produce severe vibration noise and power loss. And it is also easy to make the attire electrical equipment. And parts such as tubing pipes are damaged. And accelerate the wear of each bearing bushing foot bolt and turtle ring. When the coins are severe, the shaft will break. The diesel engine and the hair dryer are installed under the same responsibility as the two spindle axes. It depends on the measurement of the two spindles. It means that the touch of the two axes is directed to the flywheel. Only the rotation of the generator shaft can not detect the true alignment of the two spindle axes. The effect is not satisfactory. Will cause the flattening of the coupling to fail and affect the quality of the entire system. Therefore, when the diesel generator set is installed, it is very important to master the alignment method of the two spindle axes.
In order to offset the axis of the two spindles in order to make the axis of the diesel engine and the generator coaxial, it is first necessary to determine the relative position of the two axes in space. Before adjusting the alignment, you will encounter the following 4 types! relationship.
The axes of the two main shafts of the same rail are completely coincident, that is, the flywheel and the coupling disc which are completely centered on the two shaft ends are in the correct position which is both parallel and concentric.
Different axes, but the axes of the two spindles are parallel. This flywheel and the coupling disc are parallel but different.
For different axes, the axes of the two spindles are not parallel, but can intersect at the point. The flywheel and the coupling disc are not parallel but concentric.
Without the axis, the two upper axis axes are neither parallel nor intersect in space. The flywheel and the coupling disc are not parallel and different.
When two! When the shafts are different axes, the generator shaft needs to be adjusted. Until the coaxial.
Qi Zhihong, engineer, born in 1966, graduated from Southwest Petroleum Institute in 1989, majoring in mining machinery, now engaged in petroleum machinery design and research work address 434000 Hubei Jingzhou Petroleum Machinery Year two spindle alignment method diesel engine and generator two main shaft The alignment is achieved by the alignment of the coupling disc and the flywheel, so that the coupling disc and the flywheel are both parallel and concentric. When looking for the right time, first fix the diesel engine and the generator on the same chassis, then measure the relative position of the two axes in space and determine the relative displacement of the two axes. Then increase or decrease the thickness of the spacer bolt of the generator, and move the axis position of the generator main shaft to achieve coaxiality between the two main axes of the diesel engine and the generator.
In order to eliminate the measurement inaccuracy caused by machining and installation errors of the flywheel and the coupling disc, and to ensure that the two shafts can be centered in the free state, the two shafts should be loosely coupled before the measurement, and the two shafts can be rotated during the measurement. If the two main shafts are not rotated during the measurement, it is necessary to ensure that the flywheel coupling disc and the bushing have high processing and mounting accuracy. Otherwise, after the flywheel and the coupling plate are aligned, the requirements for the alignment of the two axes cannot be achieved. Although the two axes have been coaxial, when the alignment method is used, the two axes do not rotate, and the axial runout and the radial runout are measured at different positions, and the conclusions of the two axes are obtained. And the radial runout is equal in each position, and the two axes are coaxial, which is consistent with the actual.
1 diesel engine shaft; 2 flywheel 3 coupling plate; the coupling plate is loosely connected, using the turning device to rotate the two main shafts of the diesel engine and the generator, and then measuring the parallel axial gap between the flywheel and the coupling plate by using two thousand points respectively. And coaxial radial clearance. Then, with the diesel engine main shaft as the reference axis, adjust the position of the generator foot bolt so that the parallelism and coaxiality of the flywheel and the coupling disc are within the allowable range.
The steps of the two spindle alignments place the diesel engine and the generator on the common chassis, first hoist the common chassis on the ground foundation, make the fulcrums evenly contact, and then hang the diesel engine and the generator on the common chassis.
Pad the washer, fasten the diesel engine and the generator to the chassis with the bolts, and put two shaft pins between the coupling disc and the pin hole of the flywheel to loosen the connection.
Measuring the axial clearance between the coupling disc and the flywheel and the radial gap 1 and the contacts of the thousand 2 are respectively directed perpendicularly to the outer edge of the end plane and the radially outer circumference of the coupling disc, and adjust the reading of the position to zero at a certain position. . The two spindles of the diesel engine and the generator are driven to rotate by the turning device, and the readings of the thousand points at positions such as 090180270360 are read, and the maximum axial gap value and the radial gap value and the orientation of the thousand points in the rotating circumference of the spindle are observed. If the two readings in the same orientation are not equal, the axial movement of the spindle during the measurement must be eliminated until the two readings in the same orientation are equal before re-reading. When the thousand-point reading is recorded, when the thousand-point contact is moved in the direction of the disk, the judgment is whether the gap is within the specified range. According to the literature 2, the maximum axial gap value measured by 1/min is 0.4 thousand. When the maximum radial clearance value is 0.3, the two main shafts of the diesel engine and the generator are considered to be coaxial. In fact, due to the load and local heat generation of the transmission system during operation, the adjusted coupling will have additional relative displacement. Therefore, in the alignment adjustment, the allowable maximum clearance measured by the thousand points 1 and 2 should take the half of the above specified value, that is, take 0. Add 1 and skill otherwise the generator shaft must be adjusted.
The calculation of the generator foot adjustment required to calculate the parallelism of the two main shafts is calculated by taking the two main axes of the diesel engine and the generator as neither parallel nor intersecting in space. 2, by the similar angular shape, there are 4 generator shafts; 5 magnetic seats; 6 shaft pin 1 with rice for the centering, the method should be with a shaft pin irrigation, and also a batch of EB 616. 01. The diameter of the measuring part of the D-thousand-one contact or the outer diameter of the coupling disc flange, the thickness of the sheet, draw; take a thousand points at 12 o'clock, the position is seen from the tail of the generator, the next simultaneous reading, 1; 1000 points 1 at the 6 o'clock position of the hour hand read again, mm, the same reason, the amount, move; 1 thousand points 1 at the 3 o'clock position of the reading heart generator to the left or right translation distance, 1; adjust the generator shaft so that the two spindles loosely loosen the generator foot bolts, and add the thickness of the gasket under the four foot bolts of the generator. When 0, the gasket of 1 thickness should be subtracted; the generator foot should be translated. Bolt 1 and, to the right, the distance of the moving heart when looking at the tail of the generator, when the heart is 0, should shift the distance to the left. Then tighten the generator foot bolts.
Check and put the stable pin on the crankshaft circumference to observe the maximum axial clearance value and the maximum radial clearance value of the two thousandth contact in the spindle rotation cycle. If the clearance value is within the specified range, the stable pin is marked; Otherwise, repeat the above steps.
Adjust the generator shaft so that the two main shafts loosen the generator foot bolts in parallel, and use the vertical top wire to lift the generator base. When the two foot bolts at the foot of the generator are added with a thickness of 1 spacer, when 7, The 7-thick gasket should be subtracted; use the horizontal top wire to make the foot bolt to the right from the tail of the generator. When the distance is particularly high, the distance should be shifted to the left by 1 distance. Tightening the generator foot bolts.
At this time, the axes of the two spindles are spatially parallel.
Calculate the amount of generator foot adjustment required for the coaxiality of the two spindles. The relative position of the two spindle axes of the diesel generator set for the drilling rig depends mainly on the result of the alignment of the two main shafts of the diesel generator set during the factory installation.
When the two spindles are centered, the two spindles must be loosely connected and rotated.
When the two spindles are aligned, the axis of the generator must be adjusted parallel to the axis of the diesel engine spindle, and then the two axes should be aligned coaxially, so that it can receive both fast and good results.
This alignment method is equally applicable to shaft alignment of other machines.
1 Liu Tongzhong. Use of diesel generator sets. Beijing Machinery Industry Publishing 2 Jinan Diesel Engine Factory. Maintenance manual for the 190 series diesel engine. Jinan Shandong Science and Technology Press, 1994269270 This article edited Liu Feng through the turning device to make the two spindles rotate, read thousands of points 2
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