Look from left to right, top to bottom.
First open the drawing and look at the annotations in the lower right corner, then read from left to right and top to bottom.
There are two types of wind power generation drawings: installation models and electrical system drawings, and the models can be divided into two types: dual-feed and direct-drive. We take dual-powered motor wind turbines. as an example. The whole wind unit can be divided into tower, yaw, nacelle, hub and other parts. Among them, the tower and yaw are relatively simple, focusing on the nacelle and the hub.
How many diesel generators are there in a diesel generator set? What does the legend for a diesel generator look like on a CAD drawing? Is it a legend or a number? Urgent request!
The following is the installation process of our construction site naval for STX main engine, please refer to it.
1. Installation Procedure – Installation Procedure
1.1 After welding the structure foundation, draw the center line of the generator set and the foundation at the location of the elastic supports according to the main engine. installation drawing. Drill φ22 holes in the top foundation plate for the M20 fixing screws. Noticed ! Check the location of the elastic mounting holes before drilling the φ22 holes.
After the base welding inspection is completed, according to the installation drawing. Host The installation diagram delineates the centerline of the host when installed, the position of the cross centerline of each cushioning pad on the base, and the location of the bolt holes. Drill φ22 holes (M20 bolts) on the host base board. Notice! Before drilling the φ22 hole, check and confirm the actual location of the ball holeon the vibration damping pad.
1.2 Grind the foundation at the resilient support locations if necessary, then inspect the contact conditions between the top of the foundation and the flat plate with a 0.1 mm feeler gauge and the d gauge. The thickness should not be inserted.
Use a flat plate to grind the main base board to the position of the vibration damping pad to ensure good contact between the flat plate and the base to that the 0.1mm feeler gauge cannot be inserted.
1.3 Mount the conical elements on the base frame support using four M20 bolts screwed into the tapped holes of the upper casting (5) and tighten to 150 Nm (if the conical elements do not have not been fitted by the factory); remove the fixing bolt (7), spring washer (8) and upper locking ring (6) from the conical element, see fig. 1.
Use 4 M20 bolts to fixx the cushioning cushion. Install on the generator set base with a tightening torque of 150 Nm (if the manufacturer has not pre-installed the shock absorber pad), then remove the fixing bolts (7), spring washers (8) and lock ring upper (6); the shock absorber cushion. See figure 1.
1.4 Position the four jack bolts into the tapped holes (9) in the casting (1), see fig 1; Position the cylinder bolts with a minimum clearance of 40 mm, see fig 2;
Place the adjustment bolt into the threaded hole (9) in the cushion base (1), see Figure 1 and unscrew the adjustment bolt at least 40mm out of the cushion base damper, see Figure 2;
Conical element Fig1 Figure 1
Conical element Fig2 Figure 2
1.5 Lift the generator set with elastic supports into the correct position as shown in the installation drawing , lower the generator until it rests ccompletely on the foundation, and the assembly must be aligned with the foundation holes before work begins to avoid additional shrinkage of the assembly. Verify that all jack bolts are in full contact with the foundation.
Hoist the generator and vibrating cushion as a whole onto the vessel. to the installation drawings Place the main engine in the correct position, so that the base can fully support the weight of the main generator, and align the generator set with the bolt holes on the base board to avoid moving the generator set later. Check that all adjustment bolts are in full contact with the base.
1.6 Check that all internal pads can be turned easily using a wrench. If this is not possible, turn the four jack bolts in the cast base clockwise or counterclockwiseclockwise to release the internal pad, until all internal pads are rotated. the internal pads can be rotated freely.
Use a wrench to turn the pad screw to see if it can turn easily. If you cannot turn the pad screws, turn the adjustment bolt up or down to relieve the weight of the pad screws until all the pad screws can turn freely.
1.7 If all internal pads can rotate freely, allow the tapered elements to sit for 48 hours.
If all internal pads can rotate freely, allow the tapered elements to sit for 48 hours . .
1.8 Adjusting the tapered elements after 48 hours.
After letting it sit for 48 hours, adjust the vibration damping pad.
1.8.1 After the conical elements have been flexed under a static load for 48 hours, the highur under load (H1), see fig 2, should be measured carefully. When leveling the installation, to ensure that individual supports are not overloaded.
The vibrating cushion will flex after 48 hours of static loading, then the load height of the vibrating cushion is measured (H1, see figure). 2). Particular attention should be given to ensuring that each cushioning pad is not overloaded during the leveling process.
1.8.2 The variation in height under load should not exceed 2 mm and should ideally be less; The loaded height can be measured between the top case and the H-shaped base case, on both sides (see fig 2). The difference between the two sides (TB1 and TB2, see fig. 3) of a conical assembly must not exceed 0.6 mm.
The difference between the load heights of each vibrating cushion must not not exceed 2 mm. , and the smaller the height difference, the better; measure the height H1 betweene the base of the shock absorber cushion and the shell is the load height, see Figure 2. Measure the load height of the shock absorber cushions on both sides of the host. . In addition, the difference in height between opposite sides of the same shock absorber pad (TB1 and TB2, see Figure 3) cannot exceed 0.6 mm.
If then
The difference exceeds
2 mm Level the tapered members by adjusting the lifting bolts, starting with the tapered members with the largest deviation
p>The difference does not exceed 2 mm. The height of the steel block can be measured.
See the table above. If the difference between the load heights of each shock absorber pad is greater than 2 mm, start with the shock absorber pad with. the biggest difference, turn the adjustment bolts in sequence to adjust the shock level.
If the difference between them is less than 2mm, you can start measuring the required height of the livepad.
Fig3 conical element Figure 3
1.9 Measure the steel shim at several points to obtain the greatest possible accuracy during preparation. Ensure that the minimum height of the steel shim is 40mm to ensure future replacement of the conical elements. Record the measurement data and number each steel shim. with each conical element, machine the steel shim according to the measurement data. Drill the fixing holes in the steel block according to the dimensions of the conical base box.
Take as many points as possible (at least the vibrating pad 4). corners) to measure the distance between the base panel and the bottom surface of the shock absorber pad to ensure a very accurate height value. Ensure that the height of the movable cushion is not less than 40mm to facilitate future replacement of the shock absorber cushion. Record the measurement data, number the movable pads and the pads aabsorbing vibrations one by one and deal with the moving pads according to the actual size. Drill holes in the moving pad based on the bolt hole locations on the vibrating pad base.
1.10 Turn the inner pad counterclockwise (up) until it contacts the base casting to secure the loaded height of each tapered member. Raise the generator set with hydraulic jack, remove all jack bolts.
Adjust the buffer screw upward until it touches the base of the shock absorber to ensure the height of shock absorber load. Use a jack to raise the generator and remove all the adjustment bolts.
1.11 Position each completed steel wedge according to the number, lower the generator until it is completely in place.
Place the treated moving skids in the exact position dependingnumber and slowly lower the generator until the generator is completely supported by the moving skids.
1.12 Adjusting the internal pad.
Adjust the pad screw.
Turn the inner pad clockwise (down) until it contacts the steel shim, then turn it counterclockwise. clockwise (upwards) until it contacts the base casting
Turn downwards. the cushion screw until it touches the movable cushion, then turn the cushion screw upward until it touches the base of the shock absorber cushion.
Turn the inner pad two full turns clockwise (down), and the inner pad does not contact the steel shim.
Adjust the pad screw two more turns clockwise (down), and the pad screwmpon does not touch the steel wedge. It will hit the spacer under tension.
1.13 Lock the internal pad by raising the upper locking ring and turning it to the nearest threaded hole, then secure it with the fixing bolt and spring washer, see fig. 1.
Reinstall the top locking ring locks the pad screw, see Figure 1.
1.14 Secure all tapers and steel shims to the foundation with four bolts M20 and conical self-locking nuts. Lubricate the threads with engine oil and tighten to 200 Nm.
Use. Four M20 bolts and self-locking nuts secure the vibration damping pad and movable pad to the host base. Apply butter to the bolts and torque them to 200 Nm.
Note! After all work has been completed, the buffer clearance must be checked, see points 1.12 and 1.13.
Note! Once all the installation workation completed, the buffer screw should be inspected. For specific steps, refer to 1.12 and 1.13 above.
Diesel generator set is a diesel generator set which is assembled from a diesel engine and a suitable generator. Therefore, a diesel generator can only have one diesel generator. As for how to mark on the drawing, it depends on the needs. If this is an installation, a legend can be used. If this is a plant equipment installation design, a number can be used, but it is not absolute as long as it is defined. this can be fully explained as required.