Installation, commissioning and maintenance of hydraulic machinery

Hydraulic machinery installation, commissioning and maintenance

Author: Rossby one thousand


Foreword

With the extensive development of water conservancy and hydropower projects, hoists and gates used in river dykes, hydropower stations and other projects in reservoir irrigation areas have been widely used. The knowledge of installation and commissioning technology and maintenance should also be promoted. For the building installation unit and the use management department, this technology and knowledge should be popularized to ensure the quality of the project and bring into play the engineering benefits.

Under the premise of ensuring the quality of mechanical products, based on the practice of installation and commissioning on the construction site for many years, combined with the operating principle of mechanical structural performance, the following installation and adjustment techniques and maintenance measures for hydraulic machinery are proposed for the reader's reference.

Installation, commissioning and maintenance of screw hoist and cast iron gate

First, screw type hoist

(1) Installation and commissioning

1. Before installation, be sure to check whether the parts are good, whether the lubricating oil is on the foot, whether the bolts are loose, and whether the technical data is consistent with them.

2. When installing, it is necessary to keep the basic layout plane horizontally 180°; the contact area between the hoist base and the basic layout plane should be more than 90%; the screw axis should be perpendicular to the horizontal plane of the upper beam of the sluice; To avoid tilting of the screw, causing local stress and damage to the machine.

3. After installation, it must be tested, one for no-load test, that is, let the screw make two strokes, listen to its abnormal sound, and check whether the installation meets the technical requirements. For the load test, under the rated load, make two strokes, observe the operation of the screw and the gate, and whether there is any abnormality. Only after the confirmation is correct can it be officially run. After the load has been running for a period of time, it is necessary to carry out the first maintenance. The metal foam generated by the friction of the new parts in the machine, especially the screw, nut, turbine and vortex rod, should be lightly washed, coated with lubricating oil, sealed tightly and continue to be used.

(two) use and maintenance

1. The operator must master the structure, performance and operation of the hoist and have some mechanical knowledge to ensure the normal operation of the machine.
2. Before the operation, the hoist is thoroughly inspected, the lubrication of each part is good, and the bolts are loose. Check whether the power line is connected and the switch is good when the motor is turned on and off.
3. During electric operation, the operator must not leave the site and immediately stop the problem.
4. When the hoist is repaired, the load must be removed.
5. When in use, it is necessary to inject the lubricating oil from the oil filling hole at all times. Always maintain sufficient lubricating oil. The screw should regularly remove the grease and apply new oil to prevent corrosion.

Second, cast iron gate

(1) Installation and commissioning

1. Before installation, first check the connection screws between the mullion and the horizontal frame, between the ram and the ram (refer to the gate of the multiple ram combination), whether it is loose during transportation and loading, and whether their joints are wrong. To adjust to a flat surface, then tighten the bolts.

2. During installation, the gate is vertically erected into the gate groove, and the pad is adjusted on the underside of the two sides of the vertical frame (the beam is strictly prohibited). The two vertical frames are erected with manual hoists and inclined, and the gates are straightened and leveled. String the anchor bolts, support the box for the first stage pouring, pay attention to the concrete can not bury the gate frame, so that the bottom plane of the brake frame is attached to the cement wall. When the concrete is solidified, adjust the gate frame and tighten the anchor bolts. When adjusting the gate, measure the gap around the gate and the seal of the gate at the back of the gate with a feeler gauge. If there is more than 0.3mm, the iron plate between the gate and the concrete wall is strong. , eliminate the gap, and then adjust to the surrounding clearance are below 0.3mm, and then carry out the second stage pouring, concrete is buried in the gate frame is preferably one-half.

3. When pouring concrete, the mortar flowing into the gate, the gate frame, the inclined iron and the baffle should be completely removed to prevent the mortar from opening and closing after solidification.

4. Remove the reinforcement. Before the gate is delivered, in order to make the gate and the brake frame fit tightly, the gap is reduced after installation. The gates of 2m or more are installed with 4-6 hooking irons on the upper and lower horizontal frames, and the top wire is added to the shelf of the vertical frame. Note that after the gap adjustment, the hook iron and the top wire are removed to open and close the gate.

(two) use and maintenance

1. When opening and closing the gate, pay attention to the upper and lower limit positions of the gate, and do not exceed the limit, so as not to damage the gate or the hoist.
2. If there is any abnormality in the process of opening and closing the gate, it should be stopped immediately and checked and repaired in time.
3. When the gate is closed, it is 10 cm away from the bottom of the gate, and it is suspended for 1 min, so that the rapids flush the debris in the bottom door slot, and then the gate is closed.

Conclusion

The above-mentioned installation and debugging technology and maintenance measures are simple, easy to operate, safe and good in operation. It ensures the requirements of “close and close flexible and tight water tightness” in engineering applications, which improves the quality of the project, prolongs the service life and exerts mechanical effects. It is a reliable technology and measure to ensure the efficiency of the project.