Bristol H2BG124DBE | 10 horsepower Bi Shi Tu compressor | Fully enclosed piston refrigeration compressor

Bristol piston compressor performance introduction:

1The exhaust temperature shall not exceed125℃ (distance from compressor)150㎜-200At the exhaust pipe (mm), but it must be higher than the saturation temperature corresponding to the exhaust pressure28℃。

2The temperature at the center of the bottom of the casing during insulation shall not exceed107.2℃, but at least higher than the saturation temperature corresponding to the suction pressure28℃。

3The temperature of the motor coil shall be measured by resistance method, and the measured temperature shall not exceed129.4℃。

4The suction temperature should not be less than the degree of superheat when the outdoor environment temperature is high2.8℃

5The lowest ambient temperature should be at least-29Above ℃, otherwise the compressor will be damaged.

6The maximum startup frequency is "six on and six off" per hour.

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 evaluatedcompressorConduct 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.