JB/T 5446-1999 Piston type single unit two-stage refrigeration compressor
Some standard content:
JB/T5446 - 1999 | Revision of "Technical Conditions for Piston Single-unit Two-stage Refrigeration Compressor" and ZBJ73005--89 "Test Method for Bracketed Single-unit Two-stage Refrigeration Compressor". Compared with JB/T5445-91, JB/T5446--91 and ZBJ73005~-89, the main technical content of this standard has changed as follows:
Deleted the parameters and technical requirements related to R12; - Increased the bore diameter by 100mm. Parameters and requirements for the 70mm stroke series; the noise measurement is changed to measure the sound pressure level first, and then converted to sound power level; the model representation method is changed.
This standard replaces JB/T5445--91, IB/T5446--91 and ZBJ73005--89 from the date of implementation. Appendix A, Appendix B and Appendix C of this standard are all appendices of the standard. Appendix D and Appendix E of this standard are both reminder appendices. This standard is proposed and administered by the National Refrigeration Equipment Standardization Technical Committee. This standard was drafted by: Dalian Refrigeration Co., Ltd. The main drafters of this standard: Zhao Chunyi, Wang Zhiqiang, Zhang Weimin, Su Jianming, Zhao Yan, and Wang Xuewei. 528
1 range
Mechanical Industry Standard of the People's Republic of China
Piston single-machine double-stage refrigeration compressor
Reciprocating single-machine double-stage refrigerating compressor
JB/T 5446—1999
replaces JB/T5445--91
JB/T 5446—91
ZB J73 005--89
This standard specifies the piston Terminology, product classification, technical requirements, test methods, inspection rules, marking, packaging and storage of single-machine two-stage refrigeration compressors (hereinafter referred to as compressors) and piston-type single-machine two-stage refrigeration compressor units (hereinafter referred to as compressor units). This standard Applicable to compressors and compressor units using R22R717 as refrigerant and with cylinder diameters of 70 to 170 mm. Compressors and compressor units using other refrigerants may refer to this standard. 2 Reference standards
The provisions contained in the following standards. , constitute provisions of this standard by reference in this standard. The versions indicated are valid at the time of publication of this standard. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the following standards. GB 191—1990
Picture marks for packaging, storage and transportation
GB/T 309—1984
GB/T 776-1976
GB/T 1184--1996| |tt||GB/T 1801
GB/T 2624
-1979
-1993
GB/T 3853—1998
GB/T 5773-
1986
GB/T 6388--1986
Rolling bearing needle roller
General technical conditions for electrical measuring indicating instruments
Shape and position tolerances not specified Note tolerance value
Tolerance and fit size to 500mm Hole, shaft tolerance zone and fit Flow measurement Throttle device using orifice plate, nozzle and venturi tube to measure fluid flow filled round arm Positive displacement compressor acceptance test | ] -
-1999
JB/T 9058—1999
3 definitions
signs
refrigeration oil
refrigeration and air-conditioning equipment noise Determination
Method for determination of cleanliness of refrigeration equipment
This standard recommends the following definitions
3.1 piston-type single-machine two-stage refrigeration compressor
with high and low pressure cylinders. A single piston refrigeration compressor. 3.2 Piston-type single-machine two-stage refrigeration compressor unit is a general term for a piston-type single-machine two-stage refrigeration compressor, motor, transmission device, ancillary equipment, etc. assembled on a common base. 3.3 Low pressure stage
Two-stage compression, from low pressure to intermediate pressure compression end, approved by the State Machinery Industry Bureau on 1999-07-12 and implemented on 2000-01-01
529
3.4 High-pressure stage
JB/T5446—1999
Two-stage compression, from the middle pressure to the high pressure compression end. Product type
4.1
The compressor cylinder layout type and the ratio of high and low pressure cylinders are specified in Table 1. Table 1
Cylinder
Cylinder
number
number
ratio
matching
type
formula
High-pressure stage
4
Low-pressure stage
3
SV type angle type
The compressor is equipped with an energy adjustment mechanism and an unloading starting mechanism . 4.2
High pressure stage
2
6
Low pressure stage
4
W type angle type
4.3 compressor unit It adopts coupling direct drive or V-belt drive. Basic parameters
5
5.1
Cylinder
Diameter
70
The basic parameters of the compressor should comply with the provisions of Table 2. Row
Cheng
mm
70
55
100
100
125
170| |tt||80
70
110
100
140
speed range
r/min
1 800~~1 000
1500~750
1200~600
1000~500
cylinder
number
ratio||tt ||2/6
Table 2
Capacity
Maximum speed
r/min
1800
1500
1200
1000
Note: The volumetric displacement of 1/3 and 2/4 single unit two-stage compressors can be calculated according to this table, 5.2
Displacement
m \/h
High voltage level
58.2
45.7
141
113
98.7
194||tt| |177
381
The working conditions for determining the nominal cooling capacity of the compressor and compressor unit are shown in Table 3. Table 3
Preparation agent
R717
R22
Suction pressure
Saturation temperature
40
1) The intermediate pressure should be specified by the manufacturer during design. 530
Low pressure stage
Suction temperature
20
-10
Product
Low pressure stage
174.6|| tt||137
424
339
296.8
583
530
1143
row||tt| |High pressure level
2
Low pressure level
6
S type angle type
Quantity
Minimum speed
r /min
1000
750
600
500bzxz.net
Discharge pressure
Saturation temperature
35||tt| |Displacement
m'/h
High pressure level
32.3
25.4
70.7
56.5
49.5| |tt||97.1
88.3
191
Low voltage grade
96.9
76.2
212
170|| tt||148.4
291.4
265
572
C
Refrigerant liquid temperature and
high pressure stage suction temperature
intermediate pressure 1)|| tt||Saturation temperature +5
Intermediate pressure\)
Saturation temperature + 10
6 Technical requirements
6.1-General requirements
JB/T5446 —1999
6.1.1 The compressor shall be manufactured in accordance with the provisions of this standard and in accordance with the drawings and technical documents approved through prescribed procedures. 6.1.2 The lubricating oil used in the compressor should comply with the regulations of GB/T16630. It should also be protected from dust and moisture during use. 6.1.3 The difference between the oil pressure of the compressor lubrication system and the pressure in the crankcase should not be less than 0.1MPa. 6.1.4 The safety valve of the compressor should be sensitive, calm, safe and reliable. 6.1.5 When the ambient temperature reaches a maximum of 43°C and the cooling water temperature is 33°C, the temperature of the lubricating oil in the compressor crankcase should not be higher than 70°C. 6.1.6 The compressor should be airtight, and the suction chamber between the low-pressure stage and the high-pressure stage should also be airtight. 6. 1. 7
The oil consumption of R717 compressor lubricating oil is as specified in Table 4. Table 4
Nominal working condition refrigeration capacity
kw
15
>15～30
30～65
Maximum fuel consumption
g/h
70
100
140
6.1.8 Oil dripping from the compressor shaft seal should not exceed 0.5mL/h. 6.2 Performance requirements
Nominal operating refrigeration capacity
kw
≥65～130
>130
Maximum fuel consumption
g /h | Specified values ??in Appendix D (Informative Appendix).
6.2.2 Compressor performance values ??are rounded as specified in Table 5. Table 5
Refrigeration capacity range
kw
A10
>10～30
>30～100
>100～300| |tt|| Refrigeration capacity rounded value
kw
0.05
0.1
0.2
0.5
Unit shaft power control capacity Rounded value
kw/kw
0.01
Unit cooling capacity weight rounded value
kg/kw
0.1
6.2. 3. The user department can refer to the performance curve provided by the manufacturer to calculate the actual cooling capacity and motor power based on different working conditions and actual pipeline resistance loss.
6.2.3.1 The performance test of the compressor shall be carried out in accordance with the methods specified in this standard and GB/T5773. 6.2.3.2 The nominal working condition cooling capacity of the compressor shall be operated according to the working conditions specified in Table 3. The cooling capacity of the compressor shall not be less than 95% of the value specified in 6.2.1.
The cooling capacity includes the cooling capacity obtained by superheating the refrigerant vapor on the suction pipe. 6.2.3.3 The cooling capacity per unit shaft power of the compressor under nominal operating conditions shall not be less than 95% of the value specified in 6.2.1. 6.2.4 Compressor weight indicators include suction and exhaust stop valves. The weight of instruments, couplings (or flywheels), V-belts, common bases and refrigeration oil are not included.
6.3 Compressor design and usage conditions
6.3.1 The compressor should be able to work reliably for a long time under the design and usage conditions specified in Table 6. 531
Item
Maximum exhaust pressure saturation temperature, C
Maximum pressure difference, MPa
Maximum suction pressure saturation temperature,
Maximum exhaust Temperature,
Operating temperature range, ℃
Maximum temperature of the compressor unit installation site, ℃ County
JB/T 5446—1999
Table 6
Low voltage level
Commercial pressure level
Low voltage level
High pressure level
Low voltage level
Low voltage level
High pressure level
R22
16
49
25
115
145
25~~—55
0.8||tt ||1.6
38
R717
18
46
-- 20
120
150||tt ||—20~-50
6.3.2 The manufacturer should specify the maximum compression ratio and working range of the compressor based on the size of the compressor, measured exhaust temperature, cooling capacity per unit shaft power and the conditions in Table 6 .
6.4 Pressure resistance and air tightness requirements for compressor parts and components 6.4.1 The high-pressure chamber, cylinder head, and exhaust main pipe of the body should undergo pressure resistance and air tightness tests, and the pressure should be maintained for 5 minutes each, and there should be no leakage . The pressure of the high-pressure side pressure test is 1.5 times the design pressure, and the pressure of the air tightness test is the design pressure. 6.4.2 The low-pressure chamber, crankcase, crankcase side cover and suction main pipe of the engine body should undergo pressure and air tightness tests, and the pressure should be maintained for 5 minutes each, and there should be no leakage. The pressure of the low-pressure side pressure test is 1.5 times the saturation pressure corresponding to the highest temperature of the compressor unit installation site, and the pressure of the air tightness test is the saturation pressure corresponding to the highest temperature of the compressor unit installation site. 6.4.3 The cooling water jacket should pass the 0.7MPa pressure test, maintain the pressure for 5 minutes, and should not leak. 6.4.4 The pressure and air tightness tests shall be carried out according to the methods specified in Appendix A (Appendix of the Standard). 6.5 Technical requirements for compressor parts and components
6.5.1 Cylinder liner, piston, piston ring, oil ring, piston pin, connecting rod, connecting rod bearing bush, connecting rod bushing, needle roller, needle roller jacket, connecting rod Rod bolts, connecting rod nuts, shaft seal parts, valve group parts, oil pump parts and rubber and plastic pressed parts, etc., parts of the same specification should be interchangeable. 6.5.2 Compressor needle rollers should comply with the requirements of GB/T309. 6.5.3 The needle roller jacket of the high-pressure connecting rod of the compressor shall comply with the provisions of Appendix B (Appendix of the Standard). 6.6 Noise limit of compressor unit
6.6.1 The sound pressure level of the noise of the compressor unit shall be measured according to the method specified in JB/T4330, and the sound power level of the compressor unit shall be calculated according to the formula provided by JB/T4330.
6.6.2 The noise sound pressure level limit of the compressor unit shall not exceed the provisions of Table 7, and the sound power level indicator table 7 shall also be provided
Cylinder size
70|| tt||532
mm
stroke
55
70
number
4
6||tt| |8
4
6
8
R22
Refrigerant
80
81
82
81
82
82
dB(A)
R717
Cylinder
100||tt| |125
170
mm
6.7 compressor cleanliness index
stroke
70
80
100
110
140
JB/T 5446--1999
Table 7 (End)
Number of cylinders
4||tt ||6
8
4
6
8
6
8
4
6
8
4
6
8
4
8
6.7.1 Compressor machine Cleanliness inspection shall be carried out according to the method specified in JB/T9058. 6.7.2
R22
82
84
85
82
84
85
83| |tt||85
86
83
85
86
Ling preparation
82
83| |tt||85
83
85
86
dB(A)
R717
84
86
87
84
86
87
85
87
88
8|| tt||90
92
In addition to the dirt on the suction filter, the total mass of dirt on the surfaces of other parts and components that come into contact with refrigerant and lubricating oil should not exceed The provisions of Table 8.
Table 8
Cylinder
Bore diameter
mm
Number
70
100
125| |tt||170
4(1/3))
0.83
1.04
1.23
1.60
6(2/ 4)
0.94
1.17
1.44
1.80
1) The number of cylinders in the table is the sum of the number of high- and low-pressure stage cylinders. The numerator in the parentheses is the number of high-pressure cylinders, and the denominator is the number of low-pressure cylinders. 6.8 Compressor unit vibration limit
6.8.1 Compressor unit vibration shall be carried out according to the method specified in Appendix C (standard appendix). 6.8.2 The vibration limit of the compressor unit should not exceed the requirements in Table 9 (single amplitude vibration peak). Table 9
Cylinder
Diameter
70
mm
Row
55
70
Process
R22
Made
Cold
22
24
Agent
8(2/6)||tt ||1.05
1.30
1.60
2. 0
R717
g
um
533||tt ||Cylinder
Diameter
100
125
170
mm
6.9 Reliability requirements of compressor
Line
Cheng
70
80
100
110
140
JB/T 5446--1999| |tt||Table 9 (End)
R22
26
28
30
32
Made
Cold
25
26
Agent
6.9.1 The average trouble-free operation requirements of the compressor shall comply with the standards for reliability of each type of compressor. 6.9.2 The mean operating time between failures (MTBF) of the compressor should be no less than 8000h. 6.10 Appearance quality of the compressor unit
The product is beautiful in appearance, the casting surface is flat and smooth, the paint color is harmonious and durable, and the pipeline connections are simple and neat. 6.11 A set of user-specific tools is provided with each compressor. 6.12 Warranty period
R717
28
30
32
36
ptn
Before users follow the product instructions Under the conditions shown in the regulations, within 18 months from the date of manufacture and delivery, and when the actual working time of the compressor does not exceed 5000h, if the product is damaged or cannot work properly due to poor manufacturing quality, the manufacturer shall Free replacement or repair.
7 Inspection Rules
7.1 General Requirements
Each compressor must be inspected by the inspection department of the manufacturer and must be accompanied by a product certificate before leaving the factory. 7.2 Inspection classification
Compressor inspection is divided into factory inspection, type inspection and sampling inspection. The test methods are carried out in accordance with the provisions of this standard. 7.3 Factory inspection
7.3.1 Required inspection items for export inspection
7.3.1.1 Each compressor shall undergo the following tests: a) No-load test
Check the assembly of moving parts of the compressor For quality and lubrication conditions of the lubrication system, the test time shall not be less than 1 hour. There should be no oil leakage at the shaft seal and oil pipe joints during operation. There is no abnormal temperature rise in friction parts (such as the surface of the main bearing, the surface of the shaft seal, etc.). b) Air load test
When the high-pressure stage and low-pressure stage exhaust pressures are both 0.3MPa, the test time is not less than 1 hour. After parking, check that the moving parts should be free of looseness, and that there should be no abnormalities in the friction parts, cylinder pulls, etc. Otherwise, the defect should be eliminated and re-tested until it is qualified. c) Vacuuming test
The low-pressure stage of the compressor should be able to pump the crankcase, and the high-pressure stage should be able to pump the suction chamber pressure of the high-pressure stage to 15kPa. d) Exhaust valve sealing test
Evacuate the compressor crankcase and high-pressure stage suction chamber pressure to 15kPa and then stop, and pressurize the high-pressure stage exhaust chamber to 0.5MPa, and the low-pressure stage exhaust chamber When the chamber is pressurized to 0.5MPa, the time for the high-pressure stage suction chamber pressure and the crankcase pressure to rise back to 0.1MPa should be no less than the values ??specified in Table 10. Check the sealing of the high- and low-pressure stage exhaust valve groups. 534
e) Displacement test
cylinder
8
number
JB/T 5446-1999
Table 10|| tt | The gas volume should not be less than 95% of the displacement under the compressor performance specified in Table 5. When the high and low suction pressures are both atmospheric pressure and the exhaust pressure is 0.4MPa for ammonia compressors and 0.3MPa for Freon compressors, the measurement method can be carried out according to one of the following methods: Simplified performance test method: press Carry out according to the provisions of GB/T3853; Can filling method: Carry out according to the provisions of GB/T3853. The deviation of the compressor air displacement measured by one of the above methods should comply with the factory design regulations. f) Sealing test
Fill the compressor with 1MPa (gauge pressure) nitrogen or dry air for no less than 24 hours, or immerse it in water for no less than 5 minutes. Check all metal connections of the compressor. There should be no leakage at the joint and shaft seal. However, it is allowed to reduce the test pressure by 1%. Compressors using Freon as refrigerant are allowed to be inspected with a mixture of Freon and nitrogen. The partial pressure of Freon in the mixture should not be less than 0.3MPa (gauge pressure).
g) Vacuum test
After passing the sealing test, close the compressor suction and exhaust stop valves and conduct a vacuum test. When the absolute pressure of Freon compressor does not exceed 1.3kPa and the absolute pressure of ammonia compressor does not exceed 5.5kPa, it can be maintained for more than 8 hours, and the pressure rise does not exceed 0.65kPa. 7.3.1.2 Appearance quality inspection.
7.3.2 Disassembly and Inspection Requirements
In the above inspection, after the inspection of the compressor unit operation item is completed, the relevant parts should be disassembled, inspected and cleaned, and the lubricating oil should be replaced. 7.3.3 Factory inspection and sampling items
7.3.3.1 Refrigerant sealing test: The R22 compressor should conduct a sealing test on the casting under a refrigerant pressure of 1.0MPa, and there should be no leakage of refrigerant. The test method and number of sampling units shall be carried out in accordance with the provisions of this standard. 7.3.3.2 Cleanliness determination: It shall comply with the provisions of 6.7, and the number of sampling units shall be in accordance with the provisions of this standard. 7.3.4 Load test
If the process is mature and the quality is stable, the manufacturer is allowed to use refrigerant or nitrogen to conduct a load test and measure the exhaust volume. It is used to replace items a) ~ e in 7.3.1.1. The deviation of its equivalent cooling capacity is determined by the manufacturer through testing, but it should meet the performance requirements of 6.2. 7.4 Type test
7.4.1 Each type of compressor trial product shall be type tested and qualified. After the 8-cylinder compressor of the same model is qualified, other compressors with the same number of cylinders may not be used under the same conditions. Carry out type testing and identification, but all performance characteristics data measured by the test should be carried out. 7.4.2. When the compressor structure undergoes major reforms, the type test should be re-conducted. New products or final products with major changes in design structure should have compressor performance curve charts obtained from experiments (such as cooling capacity, shaft power, supply system, etc.). The full performance curve chart should include no less than three condensing temperatures and no less than five evaporating temperatures for each condensing temperature (which should include all working conditions specified in Table 11). 7.4.3 Type testing can only be carried out after the test procedures specified in 7.3.1 and 7.3.2 have been completed. The continuous time of the type test shall not be less than 500h, and the continuous time of the spot check test shall not be less than 150h. The test conditions and time allocation shall be carried out in accordance with Table 11. 535
use
use
refrigerant
R22
R717
test conditions
name||tt| |meaning
maximum shaft power
maximum pressure difference
name
meaning
maximum shaft power
large pressure difference||tt ||Evaporation
Temperature
40
--25
-55
-40
20
50| |tt||JB/T5446-1999
Table 11
low pressure stage of wax pressing machine
suction temperature
C
-10||tt ||-5
—20
10
25
1) The intermediate pressure should be specified by the manufacturer in the design. 7.4.4 The following content and requirements should also be included in the type test: condensation
temperature
35
49
40
35
46
40
Liquid temperature
Intermediate pressure
Saturation temperature +10
Intermediate pressure
Saturation temperature +5
a) Noise measurement, measured when operating under the nominal operating conditions of 7.4.3, shall comply with the provisions of 6.6; b) Vibration measurement, shall comply with the provisions of 6.8; c) Lubricating oil consumption measurement, the oil consumption of the R717 compressor shall comply with Provisions of 6.1.7: d) Cleanliness measurement shall comply with the provisions of 6.7. Type test
Time
≥300
≥100
≥300
≥100
h
Spot check test| |tt||Time
≥50
7.4.5 After the type test, measure the cylinder liner mirror, piston, piston ring, piston pin, main bearing, connecting rod bearing, connecting rod bushing, crankshaft shaft Check the wear of the neck and crankshaft pin neck, shaft seal friction parts, valve plates and oil pump parts, and there should be no defects such as strains or bites. 7.4.6 During the time specified in the type test and spot check test, it is allowed to stop the machine midway to check the operation of the machine. If major parts or components are damaged (such as crankshaft breakage, cylinder pull, etc.) and need to be replaced, the tests that have been carried out will be invalid. , and after taking measures, retest according to regulations. 7.5 Sampling inspection
7.5.1 Sampling inspection plan:
a) Each type of compressor produced in batches should be subject to sampling inspection to check the stability of the product production process b) At the same time within one year The number of model products is regarded as an inspection batch, and the sampling time should be evenly distributed within one year; c) The inspection plan shall be based on the one-time sampling plan specified in Table 12, and the first unit sampling inspection shall be carried out, and the inspection method shall be as specified in this standard. Operating time: 48h for R717 compressor; 36h for R22 compressor. The test working conditions are as shown in Table 11, and the random inspection time for various working conditions is 8 hours. d) The inspection plan shall be based on the one-time sampling plan specified in Table 12. Table 12
Batch
Quantity
500
>500
Sample size n
2
3||tt ||7.5.2 During the sampling inspection, the test qualification number A shall also be carried out according to the provisions of 7.4.4.
0
1
The number of unqualified judgments R.
1
2
7.5.3 After the sampling inspection, the cylinder liner mirror, piston, connecting rod bearing, crankshaft pin neck, valve plate and other parts should be inspected and there should be no strain. , bite and other defects.
8 Thermal performance test regulations
8.1 Two cooling cycles
8.1.1-stage throttling, intermediate complete cooling, single machine two-stage cycle, Figure 1 shows stage throttling, intermediate complete cooling Single-machine two-stage cycle system diagram, the refrigerant vapor from the evaporator is compressed to an intermediate pressure in the low-pressure stage cylinder, enters the intercooler, and is cooled by the liquid refrigerant in it to the saturation temperature at the intermediate pressure, that is, from overheating Steam 536
3 After sampling inspection, the cylinder liner mirror, piston, connecting rod bearing, crankshaft pin neck, valve plate and other parts should be checked. There should be no defects such as tearing and biting.
8 Thermal performance test regulations
8.1 Two types of cooling cycles
8.1.1 Single-stage throttling intermediate complete cooling single-machine two-stage cycle Figure 1 is a single-machine two-stage cycle system diagram of a single-machine throttling intermediate complete cooling. The refrigerant vapor from the evaporator is compressed to the intermediate pressure in the low-pressure cylinder and enters the intermediate cooler. It is cooled to the saturation temperature at the intermediate pressure by the liquid refrigerant therein, that is, from the superheated vapor 536
3. After the sampling inspection, the cylinder liner mirror, piston, connecting rod bearing, crankshaft pin neck, valve plate and other parts should be inspected. There should be no defects such as strains or bites.
8 Thermal performance test regulations
8.1 Two cooling cycles
8.1.1-stage throttling, intermediate complete cooling, single machine two-stage cycle Figure 1 shows stage throttling, intermediate complete cooling Single-machine two-stage cycle system diagram. The refrigerant vapor from the evaporator is compressed to an intermediate pressure in the low-pressure stage cylinder, enters the intercooler, and is cooled by the liquid refrigerant to the saturation temperature at the intermediate pressure, that is, from overheating Steam 536
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