What are the difficulties in installing a new hydrogen compressor?

You need to explain the model of the new hydrogen compressor first, because there are too many hydrogen compressors, and many of them are non-standard equipment.

New hydrogen compressors are prone to leaks, so more efforts should be made on sealing

Contents 1 Overview 2 Basis and description of preparation 3 Installation procedures of the unit 4 Conditions that should be met before the unit is installed 5 Construction preparations 6 Installation technical requirements and measures 7 Safety technical measures 8 List of main construction machines and tools 9 List of materials for main measures 10 Inspection and measurement equipment equipment list 11 Construction progress plan 12 Construction labor force plan

The air valve of a new hydrogen compressor is most likely to leak, causing gas leakage and temperature rise.

The compressor construction process is: (1) Preparation work before construction ； (2) Compressor installation ； (3) Motor installation ； (4) Installation of ancillary equipment ； (5) Compressor oil system and water system and trial operation ； (6) Motor test run ； (7) No-load test operation of the compressor. Installation and construction methods 1. General provisions 1. This method is suitable for the installation of reciprocating piston, screw, sliding vane and membrane compressors. 2. This article is the professional technical regulations for compressor installation projects and the general technical requirements for installation projects. The disassembly and cleaning of the compressor should meet the following requirements ； (1) Generally, the following disassembly and cleaning work should be done for the integrally installed compressor. ； 1． Reciprocating piston compressors should disassemble the piston, connecting rod, valve and packing, and clean the surface of the equipment and the removed parts and components. The valve and packing should not be cleaned with steam. ； 2. When a reciprocating piston compressor sealed with oil seal lubricating oil is installed within the oil seal period specified in the equipment technical documents, except for the gas valve, other parts and components do not need to be disassembled and cleaned. 3. Screw compressors and sliding vane compressors are installed within the oil seal period specified in the equipment technical documentation. It does not need to be disassembled and washed. Those with special requirements shall comply with the provisions of the equipment technical documents. ； 4. The membrane compressor should disassemble and clean the iris cover, diaphragm and suction and exhaust valves. (2) For compressors assembled on site, the main engine parts, components and ancillary equipment should be cleaned. The valves, packings and other seals should not be cleaned with steam. After cleaning, the cleaning agent or water should be removed, and the surfaces of the components, components and equipment should be checked for damage and other defects. A thin layer of lubricating oil should be applied after cleaning (the parts and components of non-lubricated compressors that are in contact with the medium should not be oiled).

2. The longitudinal and lateral unevenness of the integrally installed compressor should not exceed 0.20/1000mm. Measurements should be made at the following locations: (1) Horizontal compressors (including symmetrical balanced types) are measured on the fuselage slide surface or other reference surfaces ； (2) Remove the cylinder cover of the vertical compressor and measure on the top plane of the cylinder ； For other types of compressors, measure on the exposed part of the main shaft or other reference surface. 3. The assembled fuselage and middle body of the reciprocating piston compressor assembled on site should meet the following requirements: (1) Inject kerosene into the fuselage to the highest level of lubricating oil. There should be no leakage after 8 hours. ； (2) The longitudinal and transverse levels of the fuselage should not exceed 0.05/1000 mm. And should be measured at the following locations ； 1． The longitudinal unevenness of horizontal compressors (including symmetrical balanced types) is measured at the front and rear points of the slideway, and the horizontal unevenness is measured at the bearing holes of the fuselage. ； 2. Vertical compressors are measured at the fuselage joint surface. 3. L-type compressors are measured on the flange surface of the fuselage. (3) The misalignment of the main bearing hole axis lines of the two compressor bodies should not exceed 0.05 mm.

The assembled crankshaft and bearings should meet the following requirements: (1) The oil passages of the crankshaft and bearings should be smooth and clean, and the oil plug of the crankshaft and the locking device of the balance iron must be tightened. ； (2) The bonding between the bearing steel shell and the bearing alloy layer should be firm, and there should be no shelling or muting. ； (3) The back of the bearing bush and the bearing seat should be in close contact, and their contact area should be less than 70% ； (4) The radial and axial clearances between the bearing bush and the main journal should comply with the provisions of the equipment technical documents. ； (5) The contact arc surface between the lower bush of the split thick-walled bearing bush and the journal should not be less than 900, and the contact area should not be less than 70% of the contact arc surface. ； For four-open bearings, the contact area between the journal and the lower and side pads should not be less than 70% of the area of ​​each pad. ； Thin-walled bearings do not need to be scraped when assembled, but the clearance should comply with the requirements of the equipment technical documents. ； (6) The levelness of the crankshaft should not exceed 0.1/1000 mm. Use a level to measure on the main journal at every 900 rotation of the crankshaft. ； (7) The non-perpendicularity between the crankshaft axis and the slideway axis should not exceed 01/1000mm ； (8) Check the distance between the cranks at the four upper, lower, left and right positions. The variation value should comply with the provisions of the equipment technical documents. If there is no provision, it should not be greater than one ten thousandth of the stroke value. (9) After the crankshaft is assembled, rotate it for several turns without any blockage.

The assembled cylinder should meet the following requirements: (1) After the cylinder is assembled, the waterway should be tested for tightness according to the equipment technical documents, and there should be no leakage. ； (2) The non-axiality of the axis of the horizontal cylinder to the axis of the slide should comply with the provisions of Table V-1.1, and the tilt direction should be consistent with the inclination direction of the slide ； When adjusting the cylinder pumping center, no gasket should be placed on the end face of the cylinder. (3) When aligning the vertical cylinder, the gap around the piston in the cylinder should be uniform, and the deviation should be less than 1/2 of the average gap between the piston and the cylinder. The non-axiality of the cylinder axis to the slide axis, cylinder diameter (mm), radial displacement should not exceed (mm), inclination should not exceed 2 ≤100 0.05 2 >100 ~ 300 0.07 0.02/1000 2 >300 ~ 500 0.10 0.04/1000 2 >500 ~ 1000 0.15 0.06/1000 2 >1000 0.20 0.08/1000

Assembling connecting rods should meet the following requirements: (1) The oil passage of the connecting rod should be smooth and clean ； (2) The contact area between the thick-walled connecting rod big head tile and the crank pin should not be less than 70% of the big head tile area ； The thin-walled connecting rod big end bushing does not need to be scraped. The contact area between the connecting rod small end bushing (bearing bush) and the crosshead pin should not be less than 70% of the area of ​​the small end bushing (bearing bush). (3) The radial clearance and axial clearance between the connecting rod bush and the crank pin should comply with the provisions of the equipment technical documents. ； (4) The radial clearance between the small end bushing (bearing bush) of the connecting rod and the crosshead pin, and the axial clearance between the small end bushing (bearing bush) and the crosshead body, shall comply with the provisions of the equipment technical documents. ； (5) Connecting rod bolts and nuts should be tightened and locked evenly according to the tightening torque recommended in the equipment technical documents.

The crosshead assembly should meet the following requirements: (1) The contact area between the cross-head sliding shoe and the slideway should not be less than 60% of the sliding shoe area ； (2) The clearance between the crosshead sliding shoe and the slideway should comply with the provisions of the equipment technical documents at each position of the stroke. ； (3) For symmetrically balanced compressors, the crossheads on both sides of the fuselage move symmetrically and the sliding shoes are stressed in different directions. The assembly should be carried out according to the markings made by the manufacturer to prevent misassembly and ensure that the axis of the piston rod coincides with the axis of the slide. ； (4) The connecting bolts and locking devices of the cross-head pins should be tightened and secured.

Assembling the piston and piston rod should meet the following requirements (1) The piston ring should be inspected for light leakage in the cylinder first. The light leakage should not be more than two places on the entire circumference, each place should not exceed an arc length of 45 degrees, and the distance from the piston ring opening should be greater than 30 degrees (except for plastic rings) ； (2) The gap between the piston ring and the end face of the piston ring groove, and the gap between the piston ring and the opening of the cylinder when the piston ring is put into the cylinder, should comply with the provisions of the equipment technical documents. ； (3) The piston ring should be able to rotate freely within the piston ring by hand. When the piston ring is pressed by hand, the ring should be able to completely sink into the groove. The piston should be installed into the cylinder. The positions of the openings of piston rings in the same group should be staggered with each other, and the positions of all openings should be staggered with the valve holes. ； (4) The gap between the piston and the cylinder mirror should comply with the provisions of the equipment technical documents. For horizontal cylinders and pistons with bearing alloy poured at the bottom, the upper gap is allowed to be less than the lower gap by about 5% of the average gap. ； (5) The contact area between the piston support surface poured with piston bearing alloy and the cylinder mirror surface shall not be less than 60% of the piston support arc surface. (6) The piston rod and piston, and the piston rod and crosshead should be firmly connected and locked ； (7) The clearance between the inner and outer dead centers of the piston in the cylinder shall comply with the provisions of the equipment technical documents.

The assembled filler and oil scraper should meet the following requirements: (1) When assembling the packing, its oil, water and air pores must be smooth and clean ； (2) The contact area of ​​the end face of each packing ring and the end face of the stuffing box should not be less than 70% ； (3) The contact area between the packing, oil scraper and piston rod should not be less than 70% of the ring area of ​​the group ； (4) When assembling the oil scraper, the scraping edge should not be rounded, and the direction of the blade should not be reversed. ； (5) After the filler and oil scraper are assembled, the gaps everywhere should comply with the equipment technical documents. ； (6) The locking device of the packing gland must be locked securely.

The assembled air valve should meet the following requirements: (1) The elastic force of the valve spring should be uniform, and the valve plate and spring should not be stuck or skewed. ； (2) The air valve adjustment device and valve plate lift should comply with the provisions of the equipment technical documents. (3) After the gas valve is assembled, kerosene should be injected for tightness testing, and only discontinuous drop-like leakage is allowed.

The assembled lubrication system should meet the following requirements: (1) The oil pipe should not have sharp bends, twists or flattening ； (2) The transmission mechanism connecting the crankshaft and the oil pump or the crankshaft and the oil injector should operate flexibly ； (3) The pipelines, valves, filters and coolers of the lubrication system should be tested for tightness according to the pressure specified in the equipment technical documents after assembly. If there are no regulations, the test should be performed according to the rated pressure. There should be no leakage. (4) The oil pipe should be drained through the exhaust first, and then connected to the oil supply and lubrication point.

Auxiliary equipment (1) Before the auxiliary equipment of the compressor (such as cooler, gas-liquid separator, buffer, dryer, gas storage tank, filter, vent tank, etc.) is put in place, the orientation of the pipe opening, the position of the anchor bolt hole and the foundation should be checked according to the construction drawing, and check whether each pipeline is smooth. (2) Ancillary equipment that is subject to pressure shall be subjected to strength and tightness tests according to the pressure specified in the technical documents. If there is no provision, the strength test pressure shall be carried out according to the provisions of Table V-12., and the tightness test pressure shall be carried out according to the rated pressure. Auxiliary equipment strength test pressure gauge, tilt fixed pressure P (kgf/cm) Test pressure PS (kg/cm2) 12 1.5PP+31.25P The strength test should use water as the medium. The equipment should be maintained under the test pressure for 5 minutes, then reduce the pressure to the rated pressure, and use a small hammer to gently tap along 150 mm on both sides of the weld for a comprehensive inspection. There should be no leakage or deformation.

difficulty: 1. Fine leveling ； 2. Packing sealing point.