|Wholesale import Bristol H25G184DB | 15HP | Heating and cooling industrial engineering | Cold storage refrigeration low-temperature compressor

Bristol Unit Body Design - There are many factors that affect the compression temperature of Bristol compressors. Bristol compressor units mainly include rotor clearance design and internal volume ratio（Exhaust port design）Therefore, it is necessary to comprehensively consider these factors to achieve the goal of temperature control, such as speed design. Firstly, a complete thermodynamic model of the Bristol compressor must be established to obtain accurate macroscopic performance of the compressor, such as exhaust temperature, volumetric flow rate, indicated power, etc., under given conditions such as clearance, exhaust port shape, and speed. Secondly, the currently used foreign compressors must be evaluatedH2BG124DBEcompressorConduct research to understand the actual clearance, exhaust port shape, and operating conditions, which serves as both a design reference and a validation of the accuracy of the theoretical model. Due to factors such as force deformation and thermal expansion during operation, inevitable manufacturing and installation errors, and wear of compressor meshing teeth, it is necessary to leave a certain tooth clearance between rotors, known as cold clearance. Due to the fact that Bristol compressors can only rely on reducing the clearance between rotors and between rotors and cylinders to prevent gas leakage, excessive clearance between the unit body can cause damage to high-pressure media“Return leakage”Reducing volumetric efficiency can cause an increase in exhaust temperature, and a small gap can easily lead to rotor friction accidents, so the design of the gap is crucial. Due to the complexity of the shape of the screw rotor, it is difficult to directly measure the deformation of the rotor. Therefore, in order to design the most suitable cold clearance, we use the analysis and calculation of the rotor force and thermal deformation, and then refer to the application in engineering practiceThe fitting clearance of Bristol compressor is designed by comparing and analyzing the calculation results with the survey results to determine the cold clearance of butadiene compressor.

（1）Minor repair content for piston compressor

1）Inspect and clean the valve plate assembly, inner and outer valve seats, replace damaged valve plates and springs, and test the sealing performance with kerosene.

2）checkIs there any scratch on the contact surface of the cylinder, and is the sealing condition of the contact surface good. Check the mirror surface on the inner wall of the cylinder for scratches and clean the dirt with a silk cloth.

3）Check whether the bolts, split pins, and anti loosening safety plates of the connecting rod big end bearing are loose or broken.

4）washReplace the refrigeration oil for the crankcase and primary oil filter. Check whether the oil pipelines inside the crankcase are loose.

5）Other parts: Check and clean the suction filter, check the flexibility of the unloading device top rod.

（2）Repair content of piston compressor

1）Dismantling the cylinder head requires not only checking the safety spring, but also completing minor repairs. Check the valve disc and valve line, and make adjustments, repairs, or replace any loose valve disc.

2）Remove the piston components, check the opening clearance of the piston ring and oil ring, the depth and radial clearance between the ring and groove, and the wear condition.Those who exceed the standard should be replaced. Check the clearance and wear of the piston pin and pin hole.

3）Check the radial and axial clearances between the connecting rod big end bearing and the curved pin, as well as the radial clearance and arch damage between the connecting rod small end bushing and the pin hole. Check if there is any looseness in the interference fit of the outer diameter of the small copper bushing. If it exceeds the wear limit size, it should be replaced.

4）Measure the crankshaft and main shaftCheck whether the radial and axial clearances of the bearings exceed the tolerance, and repair or replace them if necessary.

5）Check and adjust the sealing condition of the shaft seal components, and make necessary adjustments.

6）Check whether the cleaning and lubrication system and unloading device are in good condition, and repair or replace them if necessary.

7）Check the inclination and concentricity of the motor and compressor axis. Check the fastening condition of the compressor coupling.Replace the rubber sleeve of the coupling if necessary due to wear and tear.