What Is a Compressor Tank?

The m-type compressor is a symmetrical balance type compressor. Compared with the H-type compressor, the body size of the M-type compressor is relatively long, and there are many anchor bolts for fixing, and the bolts have a large pre-tightening force. When the compressor is running, inertial force, piston force, and the resulting vibration are transmitted to the fuselage and the motor. Due to the small mass of the motor, the motor is often the first to move.

The m-type compressor is a symmetrical balance type compressor. Compared with the H-type compressor, the body size of the M-type compressor is relatively long, and there are many anchor bolts for fixing, and the bolts have a large pre-tightening force. When the compressor is running, inertial force, piston force, and the resulting vibration are transmitted to the fuselage and the motor. Due to the small mass of the motor, the motor is often the first to move. Therefore, when adjusting, it is generally only necessary to move the positioning bolt oblique horn of the motor base. The installation of M-type compressors mainly includes various precision detection of motors, precision detection and installation of fuselage and crankshaft, precision detection and installation of fuselage and motor shaft, and detection and installation of fuselage displacement ^[1]

1) Position the magnetic field line of the motor rotor. Remove the motor bearing cover and position the magnetic field line of the motor rotor.

2) Check the motor main journal. Check whether there is a burr on the motor main journal, if necessary, correct the polishing to achieve a surface roughness Ra0.8; measure the ovality and taper of the motor main journal, and the requirement does not exceed 0.03mm.

3) Detect the condition of the bearing bush and the journal. It is required that the contact area of the under bearing of the main bearing at 80 ° with the journal exceeds 70%; the clearance between the main bearing and the bearing bush is determined according to the size of the main bearing of each factory model.

4) Accuracy detection of motor coupling. It is mainly used to measure the runout of the motor coupling, and it is required not to exceed 0.05mm.

5) Detection of motor coupling and crankshaft. It is required to measure the runout of the motor coupling and the outer diameter of the crankshaft, which shall not exceed 0.05mm; to measure the non-parallelism of the motor coupling and the two planes of the crankshaft, shall not exceed 0.05mm, taking into account the motor rotor winding degree, and making The upper opening is larger than the lower opening by 0.03mm ^[2]

1) Inspection of body bearings. Mainly check whether the bearing cover is damaged and whether the height of the positioning pin is qualified; check whether the bearing hole is deformed and measure the ovality and taper of the bearing hole, and the requirement is not more than 0.03mm.

2) Detection of main journal and crank. Check that the surface roughness of the main journal and the crank neck does not exceed Ra0.8, otherwise trimming and polishing should be performed; measure the ovality and taper of the main journal and the crank neck, and the requirements do not exceed 0.03mm; install the crankshaft, and check the crankshaft main shaft The amount of neck runout is required not to exceed 0.05mm.

3) Detection of the cooperation between the main journal and the main bearing. The contact surface between the main journal and the under bearing of the main bearing is not less than 70%.

4) Detection of the turning open degree. It is required to measure the opening degree of the crank, not exceeding 0.03mm.

Measure whether the displacement of the M compressor body and the correction of the M compressor body. Pressure to correct for concentricity.

1) When correcting the open type fuselage, first install the support on the fuselage and then tighten the ground nut.

2) A set of oblique horns are placed on each side of each anchor bolt. After the initial level of the fuselage, install a crankshaft and check the deviation between the crankshaft and the center of the motor.

3) The horizontal error of the two sides of the crankshaft and the horizontal error of the body hole in the fuselage are required to be less than 2 divisions.

4) Tighten the anchor bolts. Press the table to tighten the middle anchor nut. The horizontal reference is the bearing holes at the two ends of the fuselage. The horizontal error is required to be no more than 2 squares. According to this method, the remaining middle anchor nuts are sequentially pressed.

5) If the middle body is integrated with the fuselage, it must be assembled during installation. At this time, the level should be placed in the middle body slide with the middle body slide as the reference, and the level error should not exceed 2 divisions. When adjusting, first press the anchor bolts of the fuselage in order, and then check and adjust the data to meet the requirements. Then put a set of oblique horns on both sides of the middle body anchor bolt, and refer to the data of the spirit level in the natural state to adjust the oblique horns to tighten the nut. The level is half a square higher than the cylinder side. Adjust the remaining middle body in this way ^[3]

Whether the compressor can run normally is related to the manufacturing quality and installation quality of spare parts, and reasonable structural design is the key. Improving the working performance of the compressor and rationally improving the structure of the compressor components is an eternal issue.

1. Improvement of moving parts structure

(1) Bad phenomenon before improvement. The piston force of the compressor increases with the increase of the intake air volume and the increase of the pressure. In order to prevent the joints of the moving parts from loosening, a sleeve-assisted plate tightening nut is usually used during installation and maintenance, and the pre-tightening force is too large. Excessive pre-tensioning force can easily cause the nut and piston rod thread to lock up, and the nut cannot be disassembled and the piston rod is forced to be scrapped. Excessive pre-tensioning force will also cause the piston rod thread stress to increase greatly, forcing the piston rod thread resistance. Fatigue strength is reduced, and the compressor is damaged under repeated effects of alternating loads. For example, the piston rod breaks, the cross head and neck are broken, the connecting rod head bush is burned out, and even the piston is damaged. normal production.

(2) Improved structure. Improvements have been made for crosshead and pressure body components.

(3) Improvement effect: the force per unit area is reduced and the danger of piston rod fracture is reduced. The hydraulic tightening device is used to increase the diameter of the force-bearing part at the cross head and neck and reduce the force per unit area of the force-bearing part at the cross head and neck. Under a predetermined pressure, the piston rod is uniformly extended, and the piston After the thread of the rod is rolled, the surface finish is improved, and the contact surface is greatly stressed. Reduced piston rod breakage and compressor operation stabilized.

2. Improvement of stationary components

(1) Improvement of oil wiper: The large fuel consumption is one of the problems of M-type compressors. The main reason is that the main heat dissipation path during the compressor's operation is that the heat is taken away by the oil, the cooled filler and the cylinder. . Therefore, the oil loss in the compressor oil tank is too fast. In order to solve this problem, the oil wiper is improved. (The improved oil wiper increases the area of the channel on the spacer ring, end ring and the wiper body, reduces the degree of obstruction when the oil flows through the channel, and minimizes the amount of lubricating oil that is brought to the outside by the piston rod The improved oil wiper greatly reduces fuel consumption.

(2) Improvement of the filler: the role of the filler is to prevent the spillage of combustible gas inside the cylinder, and to return the leaked combustible gas to import. Before the improvement, the sealed opening of the packing was large, and the leaked gas could not be completely recovered in time. The leaked gas not only harmed the health of the operator, but also caused the annoying hidden danger of explosion due to the accumulation of the leaked gas. The dangerous gas leak was a vicious accident caused by chemical companies The main culprit is to improve the packing seal structure is the key to solving the problem. Improved packing seal. After the improvement, the original three-group cross-type sealing structure replaced the original inner and outer ring clamping packing sealing structure. Each group of cross-type sealing structure is equipped with a sealing ring with a blocking flow to prevent deformation of the sealing ring. Packing seal

The correct installation and maintenance of the compressor is the fundamental guarantee for the normal operation of the compressor. The use of the compressor's maximum working performance to improve the compressor's working efficiency has been our goal of continuous exploration. To this end, improving the compressor component structure to optimize the performance of the compressor will be our eternal theme ^[2] .