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J78 | ||Ministry of Machinery Industry of the People's Republic of China
Released
1998-01-01 Implementation
JB/T 6533 -1997
Previous
Words|| tt||This standard is based on JB/T6533-92 "Rotary vane vacuum pump type and basic parameters", ZBJ78004-87 "2X type rotary vane vacuum technical conditions", JB/T5281-91 "Direct-coupled rotary vane vacuum pump technology" Conditions", revision of JB/T6532-92 "Types and basic parameters of direct-coupled rotary vane vacuum pumps".
When this standard was revised, the requirements for ultimate full pressure, specific power, and minimum starting temperature were added; test methods for no fuel injection and no oil leakage were added; noise indicators, gas ballast, sampling methods, and type test items were added etc. have been modified. This standard will replace JB/T6533-92, ZB.J78004-87, JB/T5281-91 and JB/T6532-92 from the effective date. Appendix A of this standard is an appendix to the standard.
This standard was proposed and managed by the National Technical Committee for Standardization of Vacuum Technology. This standard was drafted by: Shenyang Vacuum Technology Research Institute of the Ministry of Machinery Industry, Shanghai Vacuum Pump Factory, and Beijing Instrument Factory. The main drafters of this standard: Li Yuying, He Bisheng, Zhao Yang 1 Scope
Mechanical Industry Standard of the People's Republic of China
Rotary vane vacuum pump
JB/T 6533--1997
Replaces ZBJ78004-87
JB/T 5281 - 91
JB/T 6532-92
JB/T 6533-92
This standard specifies the requirements of rotary vane vacuum pumps Type and basic parameters, technical requirements, sampling and determination methods, test methods, inspection rules, marking, packaging, transportation and storage.
This standard applies to two-stage, oil-sealed rotary vane vacuum pumps (hereinafter referred to as pumps). 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB 191-90
GB/T 3163- 93
GB/T13306-. 91
Packaging, storage and transportation pictorial mark
Vacuum technical terms
Signs
GB/T 13384—92
General technical conditions for mechanical and electrical product packaging
JB/T 7266-94
JB/T 7673--95||tt| |JB/T 8106-95
SH 0528 .. 92
3 definitions
Vacuum vacuum pump performance measurement method
Vacuum equipment model compilation method
Volume Vacuum pump noise measurement method
Mineral oil type vacuum pump oil
This standard adopts the following definitions.
3.1 Pumping rate S
When the pump is equipped with a standard test and works under specified conditions, the ratio of the gas flow rate flowing through the test cover to the equilibrium pressure measured at the specified position on the test cover .Referred to as pumping speed. The unit is liter/second (L/s). [GB/T3163-93 4.5.13.2 Geometric pumping speed S
The product of the theoretical suction volume per revolution of the pump and the rated speed. The unit is liter/second (L/s), and the time unit of rotation speed is seconds. 3.3 Ultimate pressure
The pump is equipped with a standard test cover and works according to specified conditions. It tends to a stable minimum pressure without causing gas to operate normally. The unit is Pa (Pa). [4.5.8 in GB/T3163-93] 3.4 The maximum allowable water vapor inlet pressure Pwo is the maximum inlet pressure of water vapor in the pumped gas when the gas ballast pump is operating continuously under standard environmental conditions. The unit is Pa (Pa). [GB/T3163-93 4.5.187 | except the maximum water vapor mass flow rate. The unit is grams per hour (g/h). [4.5.17 in GB/T3163-93] Approved by the Ministry of Machinery Industry on 1997-04-15
1998-01-01 Implementation
1
3.6 minimum starting temperature||tt| |JB/T 6533- 1997
The lowest ambient temperature at which the pump can be started under atmospheric pressure after stopping the pump for at least 1 hour (). Type and basic parameters
4
4.1 Type
The structural type of the pump is that the rotor is eccentrically installed in the pump casing and is tangent (or intersected) with the fixed surface of the inner surface of the pump casing. In The rotor is equipped with two (or more) rotary vanes. When the rotor rotates, the rotary vanes can slide back and forth along its radial (or oblique) grooves and are always in contact with the inner wall of the pump casing. The pump chamber is divided into several variable volumes. .
4.2 Basic parameters
The basic parameters should comply with the provisions of Table 1.
Table 1
Pumping rate
Serial number
6
7
8
9
10
12
13
14
15
Model
L/s
2X-0.5||tt ||2x2-0.5
2x-1
2X2-1
2x-2
2XZ-2
2X-4
2x2-4
2X-8
2X2-8
2X-15
2Xz-15
2X-30
2XZ- 30
2X-70
Note
2
0.5
2
15
30
70
Ultimate pressure
(when gas ballast is turned off)
Pa
6×10-2
Basic parameters of the pump
Limit Full pressure
(gas ballast off)
Pa
Noise
L
dB(A)
68||tt| |70
72
75
78
80
82
86
Power distribution||tt| |Machine power
kw
N0.18
0.25
0.37
50.55
1.1
2.2||tt ||3.0
5.5
Air inlet
you
inside
mm
16
25||tt ||40
50
63
80
Pumping efficiency %
at 1.5kPa
≥80
Ultimate pressure refers to the ultimate partial pressure of a permanent gas measured with a compression vacuum gauge at a specified position on the test cover. At 2Pa ??
45
Specific power
Ws/L
360
250
185
137||tt ||147
100
79
The ultimate total pressure refers to the ultimate total pressure measured at a specified position on the test cover using a calibrated thermocouple vacuum gauge. This indicator is not used as a factory assessment indicator for the time being, but the manufacturer must report it.
The pumping efficiency is the ratio of the measured pumping speed to the geometric pumping speed. The values ??in the table are only applicable to pumps with two rotary vanes. The pumping efficiency of the three female tablets should be ≥70% at 1.5kPa3
and ≥40% at 2Pa.
4 Specific power is the ratio of the maximum power consumption of the pump to the nominal pumping: 5 Pumping rate refers to the nominal pumping speed.
4.3 model
4.3.1 Representation method
2
should comply with JB/T7673 regulations.
4.3.2 Example
JB/T 6533-1997
Belt-driven two-stage oil-sealed rotary vane vacuum pump with a pumping rate of 8L/s.The model is: 2X-8
A two-stage motor with a pumping speed of 4I/s directly drives the oil-sealed rotary vane vacuum pump. The model is: 2XZ-4
5 Technical requirements
5.1 The various performance indicators of the pump should comply with the provisions of Table 1 and be manufactured according to the drawings approved by the prescribed procedures. 5.2 The pump should not leak oil, and the water-cooled pump should not leak water. 5.3 The paint on the external surface of the pump should be smooth and clean.
5.4 The geometric pumping speed of the pump should be given in the instruction manual, and the geometric pumping speed should be 11.2 times the nominal pumping speed when designed. For complete sets of products, auxiliary machines, accessories, spare parts, etc. should be specified in detail in the instructions. 5.5 The working environment temperature of the pump is 5~~40℃. 5.6 After the pump stops, it must not be hindered from restarting due to oil return. 5.7 The continuous operation time of the pump under the inlet pressure of 100kPa (one atmosphere) to 6kPa should not exceed 3 minutes. When the inlet is vented to the atmosphere, there will be no oil injection within 1 minute.
5.8 The pump operates under the ultimate pressure .The noise value shall not exceed the provisions in Table 1 of this standard. 5.9 The value of the mean time between failures (MTBF) of the pump should be given in the instruction manual. 5.10 The pump must be equipped with a gas ballast device to remove a certain amount of condensable gas. If the ability index of pumping condensable gas is given quantitatively. It can be measured according to the method specified in Appendix A (Standard Appendix). 5.11 The ultimate pressure of the pump + must comply with the provisions of 4.2. The ultimate full pressure of the pump is not subject to assessment, but is required to be reported. It is recommended to use high-quality oils with viscosity grades of 46, 68, and 100 specified in SH0528. 5.12 The maximum operating temperature of the pump should be given in the instruction manual, and 5.13 the minimum starting temperature of the pump is 12°C. 6 Sampling and Judgment Methods
6.1 Sampling Methods
6.1.1 Composition of Inspection Batch
Single pumps are simply collected to form an inspection batch. The inspection batch can be the same as the production batch, sales batch, and transportation batch. It can be composed of a single pump of the same specification or different specifications and models, the same quality level, production conditions and production time. However, the batch size of each inspection batch shall not exceed 250 units.
The composition of the batch, the size of the batch and the method of identifying the batch should be determined through negotiation. 6.1.2 Sampling plan
adopts a one-time sampling plan. The number of samples in each batch is 2 units, and the number of qualified judgments is 0. 6.1.3 Sampling of samples
Samples should be randomly selected from the inspection batch, which can be done after the batch is formed or during the batch formation. 6.1.4 Inspection of samples
The samples taken shall be inspected according to the method specified in Chapter 7. 6.2 Judgment method
Each pump (sample) must meet the technical requirements of all assessment items in this standard to be a qualified product. If it fails to meet any of the indicators specified in this standard, it will be judged as a non-conforming product. Both samples are qualified products, and this batch is judged to be a qualified batch. Otherwise, the batch will be deemed to be unqualified. 3
7 Test methods
JB/T 6533- 1997
7.1 The measurement of pumping rate, ultimate pressure, maximum power consumption and operating temperature shall be carried out according to JB/T7266.
7.2 Measurement of noise
According to JB/T8106.
7.3 Determination without oil injection
Add oil to the pump according to the operating instructions and the oil level for measuring the ultimate pressure. Run it under the ultimate pressure to a stable pump temperature. Place the exhaust port of the pump perpendicular to the exhaust air flow. Place a piece of clean white paper on the square space 200mm away from the exhaust port. Then, fully open the air inlet of the pump to extract air. Observe and measure the time when oil spots begin to appear on the white paper. This is the failure of the pump. Injection time. You can also stop pumping when the air is pumped for 1 minute according to the above conditions, and observe whether there are obvious oil spots on the white paper. If there are more than 3 small oil spots with a diameter greater than 1mm, it will be judged as unqualified. Before the test, it is allowed to clean the parts outside the fuel tank.
7.4 Determination of minimum starting temperature
7.4.1 Test conditions
The pump should be at the minimum starting temperature.
At the beginning of the startup test, if the pump cannot be started due to too low temperature, vacuum pump oil of another viscosity can be used. The viscosity of the vacuum pump oil used at the beginning of the start-up test must be the same as the vacuum pump oil at the minimum start-up temperature specified by the pump manufacturer. 7.4.2 Test method
After injecting the test oil into the pump, the pump should run for about 10 minutes. Then the pump should stop running for at least 1 hour. Then check whether the pump can still start. 7.5 Determination of oil leakage
Before testing, the pump should be wiped clean.
After the pump has been running for 6 hours, it will be judged as qualified if there is no obvious oil stain by visual inspection or touch. The test should be carried out within 9 hours.
Inspection Rules
8
8.1 Each pump must pass the inspection by the manufacturer's inspection department before it can leave the factory and be accompanied by a product quality certificate. 8.2 The pump is divided into type test and factory test.
8.3 Type test items shall be in accordance with the provisions of Chapter 5. 8.4 Type testing should be carried out when one of the following situations occurs: a) Trial prototype identification of new or old products transferred to factory production; b) When there are major changes in design, process or materials used for normally produced products that may affect the product Performance: c) Normally produced products shall be subject to sampling inspection in accordance with the provisions of Chapter 6 of this standard every year or after accumulation of fixed output; d) When production of products that are not in production resumes;
e) Outbound testing When the results are significantly different from the last type test: f) When the national quality supervision agency makes a request for type testing. 8.5 The factory test items are:
a) ultimate pressure;
b) no oil:
c) no oil leakage.
8.6 Others
Special order. Acceptance according to ordering technical conditions. 4
9 Marking, packaging, transportation and storage
JB/T 6533-1997
Each pump should be equipped with a product label in the appropriate position. The model and size of the label should comply with GB /T13306 regulations. 9.1
should be indicated on the sign:
a) name of the manufacturer, add country name for overseas products; b) pump model and name;
c) pump technical parameters :
Ultimate pressure.Pa\;
Pumping rate, L/s;
Motor power.kw:
Speed.r/min:|| tt||Amount of oil injection, L (this item can be omitted for small pumps). (l) Year of manufacture and product number.
9.2 Each pump should be marked with a "steering" symbol at the corresponding position; large pumps should also be marked with the words "water in", "water out", "refuel" and "oil drain". 9.3 The pump outlet should be packed in a box. The inlet and outlet must be sealed. Spare parts and technical documents should be put into plastic bags and properly placed in the box. 9.4 The pump should be stored properly to avoid corrosion and damage to the wall. 9.5 Each pump should be shipped with the following documents: a) product certificate;
h) packing list:
c) product instruction manual. If there is no indication on the motor junction box, there should also be a motor wiring diagram. 9.6 Packaging
should comply with the regulations of GB191 and GB/T13384. *This item can also be divided into two indicators: ultimate pressure and ultimate total pressure. The extreme total pressure is preceded by the words "full pressure AI calculation method
JB/T 6533—1997
Appendix A||tt ||(Standard Appendix)
Determination of the maximum allowable water vapor population pressure and water vapor allowance A1.1 Maximum allowable water vapor population pressure wo For pumps equipped with gas ballast devices, the maximum allowable water vapor The steam inlet pressure wo can be obtained from the general formula for pumping water steam: pwo
where: pwo-
B
S
Maximum allowable water vapor population pressure, Pa ;B gas ballast related to 101325Pa, L/sp
133300(_ph)
133300 b
The pressure of saturated water vapor at the pump operating temperature, Pa(A1)
—The water vapor partial pressure of the gas under atmospheric pressure in the pump as the gas ballast is introduced into the pump; usually = 1333Pa (corresponding to 20°C air, 58% humidity);
S- 1. At the inlet pressure p, the pumping speed of the pump (can be obtained from the pumping speed characteristics of the pump. See Figure A1). This formula is used in this situation: that is, the exhaust valve of the oil seal pump opens when the exhaust pressure is 133300Pa. The pressure is higher than the ambient atmospheric pressure n-101325Pa. This takes into account the weight of the valve plate and oil. The operating temperature t of the pump is a function of the temperature of the exhaust section when pumping water steam, and! The relationship is shown in Table A1. A1.2 Water vapor allowance Cw
According to the ideal gas law, it is derived from the maximum allowable water vapor inlet pressure force wO: Cwo 7.8 >
Where: wo-
Water vapor allowance·g/h;
si
Measured when gas ballast is turned on under the inlet pressure pwo Pumping speed of the vacuum pump (L/s: pw) - the maximum allowable water vapor inlet pressure obtained according to formula (A1). Pa; T is the thermodynamic temperature of the pumped water vapor at the pump inlet. K. The common value is T = 293K. A2 Measurement MethodbZxz.net
A2.1 Principle
(A2)
When pumping water vapor, the additional load increases the pump temperature, which must be considered when determining the maximum allowable water vapor inlet pressure. Since it is difficult to directly measure water vapor, air is used to measure it, and then through appropriate corrections, the w value is obtained when pure water vapor is pumped. Measure the exhaust temperature tx at different inlet pressures Ph, measure the ambient temperature taml and gas ballast B. A2.2 Measuring instruments
A2.2.1 Thermometer
To measure exhaust and ambient temperature, use mercury thermometer, resistance thermometer, etc., and the error should not exceed ±0.5C. The exhaust gas temperature measurement is performed in the bent pipe according to Figure A2. Dimension D should be equal to the size of the pump exhaust port, but not less than 20mm. The temperature sensor should be installed in a location where the measured value is not significantly affected by heat conduction.
A2.2.2 Vacuum Gauge
Use a type tube vacuum gauge or calibrated membrane gauge to measure the inlet pressure, and its error should not exceed ±5% of the measured pressure. Install the vacuum gauge on the test cover specified in JB/T7266 without installing a cold trap. The pressure difference between the pump exhaust port and atmospheric pressure. Measured using a U-tube vacuum gauge calibrated to ±5%.
A2.2.3 flow meter
6
JB/T 65331997
To measure gas ballast, a gas flow meter or glass rotor flow meter with ±1% accuracy should be used count. A2.3 Measurement procedure
The installation of the measuring device, thermometer, vacuum gauge, and flow meter is shown in Figure A3. With the intake trim valve closed and the gas ballast valve fully open, run for about 15 minutes. When the temperature change measured at the specified measuring point at the exhaust port is less than 0.5'C, measure the gas ballast B. During the following measurement process, B constant. Usually when the gas ballast valve is fully open, the gas ballast amount B is 0.1 or 0.15 times the geometric pumping speed of the pump under test (that is, in most cases, B/S - 0.1 or 0.15). In order to have at least four different inlet pressures in the test, adjust the inlet fine-tuning valve (to make the pressure difference at each point equal as much as possible) to reach a stable state, and then measure the exhaust temperature. These inlet pressures are at least a little higher than the expected maximum allowable water vapor. The inlet pressure w is high. For each inlet pressure, the following data should be measured: exhaust temperature C;
inlet pressure in Pa;
ambient temperature tamC.
Measurement is only allowed when the atmospheric pressure is lower than 1.07×10°Pa. In addition, it must be noted that the difference between the exhaust pressure and the atmospheric pressure shall not exceed 1000Pa. Otherwise, the exhaust pipe has too much resistance and should be replaced. A2.4 Measurement calculation
The measured exhaust temperature must take into account corrections: a) deviation from the ambient temperature tmbh of 20C, which is related to the measured maximum allowable water vapor inlet pressure b) in order to meet the maximum allowable water vapor inlet pressure The definition of is measured by using dry air at temperature tamb instead of saturated pure water vapor at temperature t.
includes both corrections in the following formula:
tu = tx- (tamh - 20)+
where;f
f
p
faml
Corrected exhaust temperature, C:
Exhaust temperature measured in A2.3.C;
in A2.3 Measured inlet pressure, Pa;
Ambient temperature measured in A2.3, C;
At the inlet pressure, saturated water vapor temperature, C (see Table A1). tnl
101325
p
6
(A3)
Draw the functional relationship curve between t and the inlet pressure = f (t.). As shown in the figure A4. The ordinate of the intersection point of this curve and the B/S characteristic curve is the required maximum allowable water vapor population pressure (example in Figure A4: B/S=0.15.po=4200Pa). Table A1. Pure saturated water vapor pressure,
t,
0
1
2
3
4||tt ||p
Pa
610.8
656.6
705.5
757.5
812.9
t
C
5
6
7
8
9
p
Pa
871.9| |tt||934.7
100.1
107.2
114.7
7
C (see Table A1). tnl
101325
p
6
(A3)
Draw the functional relationship curve between t and the inlet pressure = f (t.). As shown in the figure A4. The ordinate of the intersection point of this curve and the B/S characteristic curve is the required maximum allowable water vapor population pressure (example in Figure A4: B/S=0.15.po=4200Pa). Table A1. Pure saturated water vapor pressure,
t,
0
1
2
3
4||tt ||p
Pa
610.8
656.6
705.5
757.5
812.9
t
C
5
6
7
8
9
p
Pa
871.9| |tt||934.7
100.1
107.2
114.7
7
C (see Table A1). tnl
101325
p
6
(A3)
Draw the functional relationship curve between t and the inlet pressure = f (t.). As shown in the figure A4. The ordinate of the intersection point of this curve and the B/S characteristic curve is the required maximum allowable water vapor population pressure (example in Figure A4: B/S=0.15.po=4200Pa). Table A1. Pure saturated water vapor pressure,
t,
0
1
2
3
4||tt ||p
Pa
610.8
656.6
705.5
757.5
812.9
t
C
5
6
7
8
9
p
Pa
871.9| |tt||934.7
100.1
107.2
114.7
7
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