JB/T 8472.1-1996 Determination of performance of steam flow vacuum pumps Part 1: Determination of pumping rate (volume flow rate)
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T8472.1~-8472.296
eqIs 1608-111993
1S01608-2:1989
Performance Determination of Steam Flow Vacuum Pumps
1996-09-03 Issued
Ministry of Machinery Industry of the People's Republic of China
1997-07-01 Implementation
JB/T 8472.1--8472.296
This standard is formulated based on the international standard IS153 edition and the national standard GB6307.2-3307.2-86 edition. The technical content of this standard is equivalent to the international standard. The writing format and method of this standard are formed according to the relevant provisions of GB 1.11993 and the technical practice of the original HG307, which is in line with the national standard. This standard is composed of the following parts under the general title of TE/84. Determination of the performance of steam vacuum system: Part 1 (i.e., TE/84.2: Determination of the flow rate (volume) of the steam; Part 2 (i.e., B/8472.2: Determination of the pressure range of the upper limit). As mentioned in the introduction of TS 16 (82), under the general title of the determination of the flow rate of steam in a vacuum system, the third part is titled "Gas flow rate", but this part of the standard has never been seen. Therefore, the first part of this standard can adopt the international standard to calculate the gas reverse rate - / day, and the calculation of the gas flow Q, I is supplemented in the form of Appendix A. Supplement, and give the calculation of the independent gas velocity. And, in the form of record, the standard for the determination of the air flow rate limit is given in Appendix 4, the Ministry of Health is the standard limit. This standard is 1≤S? July 1, 2009, the original GG357.1-~07.2-Appendix is abolished. The only national standard is issued by the six national standardization technology committees. The responsible unit for the production standard is the Vacuum Technology Research Institute of the Ministry of Machinery Industry, and the main initiators of the standard are: Zhang Yao and Li Yuying. The standard is entrusted to the Vacuum Technology Research Institute of the Ministry of Machinery Industry to compile and interpret JB/1 8472.1-98
IS0 1608-1 Foreword || tt || International Standards Organization is a worldwide association of national standardization bodies. The preparation of International Standards is normally carried out through technical committees. For material that has been included in the technical requirements, each member country concerned has the right to participate in this technical committee. The International Technical Committee signs the IFC agreement with the International Technical Committee. The adopted International Standards are circulated to the member bodies for voting and published as international standards. Requires 75 members to vote.
National quality standard 1608-1 was formulated by 150/1C112/5 vacuum technology committee to Taiwan first part to include (true seat system before the test).
Technical revision of the second release of the first release of the 1S01503-1-1986, 1S) 16% in the band of the number of steam loss of its spare performance under the title, including the following parts: the normal part. Body disease flow rate pumping speed) to determine: the first weak part: the determination of the fore stage pressure, ISO 1608-1 introduces
T () 1C of the day is the possible guarantee Lai steam flow true when the pump can be measured according to the original word under the same conditions 1 reach, because of the local, hope type each production! The measurement results of the customer's laboratory and the performance of the factory's "national technical guidelines" will be compared with a suitable basis, which is beneficial to both users and manufacturers. People's column! The overall national standard will be in due course, and the performance of the three-type British steam flow vacuum system will be extensively studied! However, the central government has changed the scope of the national standard, and the thick energy quick-connect part is released S 693, 2
I standard use
People's Republic of China Machinery Industry Standard
Steam Flow Vacuum Air performance measurement
Part 1: Determination of suction rate (volume flow rate) This standard is based on the determination of hot steam vacuum deep beat gas velocity (body medical pool single) JB/T8472.1-56
q1801608-11993
This standard applies to oil or gas generators, diffusers, jet accumulators and diffuser jet systems, that is, B/767 regulations, which is called the pressure relief principle to determine the flow distribution and expansion flow specifications, and can have "whole system and jet system improvement performance! The following types of pumps are obtained by experts.
These pumps can be equipped with or without cooling base.
2 Referenced standards
The provisions contained in the following standards have become mandatory standards through reference in this standard. All the above mentioned standard versions are valid. All the standards need to be specified in accordance with the standard. The following standard methods are used to explore the new energy JB/7: The standard method is to use the following meaning:
3.1 Extraction rate (flow rate)
is the speed at which the gas flows through the test surface. Its unit is s. When the actual calculation method is used according to the specified conditions, the gas velocity S of the supplied gas is determined by dividing the test hood's integrated flow rate Q by the test surface pressure: 3=Q/p
For the remaining flow in steam therapy,! When the pressure exceeds 10, the calculation of the gas fan is close to the real value. The limit pressure of the same vacuum is obtained.
3.2 Test unit
There is no component with specified type and size in the pump. The test gas passes through the pump. The side wall is equipped with an air inlet fine adjustment.
3.3 Extreme!
The pump is working under the specified conditions, and the air inlet valve is closed. The test should be carried out to the lowest stable pressure. 4 Test device
4.1 Composition of the device
The test hood connected to the test object is equipped with a vacuum gauge and an air inlet fine adjustment valve, and is connected to the gas rate test device through a fine adjustment valve.
4.2 Test hood
Approved by the Ministry of Machinery Industry on September 3, 1996
Implementation on July 1, 1997
JB/T B-72.1—96
As shown in Figure 1, the test hood is a tubular hood-type component: the inner diameter is the same as the inner diameter of the inlet, and the inner diameter of the cold skin is the same. The upper surface is 11 degrees to the horizontal plane, and the inclination angle is 1. The test gas is placed in the inner and outer openings of the pipe, and the test pipe is placed on the axial load, with a height of D from the inlet flange. The air pipe connection joint is 0.5 above the cover wall, and the system is under the test axis, and the axis is perpendicular to the original inlet flange. Note that if the zero-out system surface is below the highest point of the surface, the test distance between the test pipe and the test plane should be 3I./5. The inner wall length of the connecting pipe end shall not exceed 0.5 of the inner diameter of the connecting section, and can be 5mm. The plane should be parallel to the airflow direction. If the middle cooler is used, the pressure data of the gauge should be taken as two significant figures, and the type of gauge should be indicated. The air gauge used must be a calibration unit recognized by the national gauge department. When the pressure is high, the calibration accuracy should be within 5%. When the pressure is low, the accuracy should be within 10%. 4.4 Gas flow chamber installation method
According to the gas flow rate measurement method and installation surface. Most people use droplet measurement products, such as droplet measurement calibration, core wave measurement and connecting hose, etc., the difference between the centroid diameter and the liquid diameter should be 5%. The net pipe capacity can be selected according to the gas flow rate of the test case. For the design, see Appendix A of this standard. The measurement accuracy of the flow rate is as follows: a) Maximum flow rate = 9.5 × 10-Pa, m/m, ± 3% h. Flow rate range: 91% c) × 10-Pe + m/m, = 5%! Flow density per hour, %. Note: The gas temperature is set to 20 (5). Test properties 5.1 Test gas 5.2 Ring free flow rate JB/T H472. 1-96
Unless otherwise specified, the test process is carried out under a certain temperature change of 12hT, and the conditions are allowed to change within = ". 5.3 The system's cooling and cooling
The system's cooling efficiency is guaranteed to be within the total cooling conditions: the change in the thermal function of the system should be less than 5% 30mn before the test.
5.4 The type, size and volume of the deep liquid and the foreline pump
The system should be equipped with the foreline system. Yanlun formulated! Regulations. Whether the test method and procedure step to
6.1 The original Shenzhen
listen to the method adopted is "correct" method. Ren test people's movement process, Beijing 11 must enter the powerless position net change, home limit one, more Xie Cao measured speed low to maintain peace of mind, this relative knock think tide enough Guang 6.2 column word length frequency
square test beat gas method rate, Nanhai test cover, Zhenzong design and gas flow science Shen record table, to 4.4. The second assembly of the system under test, the test surface and the test device are set to an appropriate adjustment range of the air intake. Under the current conditions of the system, the air intake can be adjusted, and the air intake can be adjusted to the limit pressure, and the air flow rate of the test disk is achieved. The test box first passes through the lifting action of the dropper, and the air cushion of the test device is fully activated. The test box is tested and the air is not damaged. Turn on the source of stimulation, let the gas test case, and adjust the suction force to the appropriate range. The average force is set to make the system return to the state of the problem point. (For the test of the inverse pressure, at least one point in each circle should be traced from the lowest suction pressure to the highest suction pressure, about 5.2.5.4.7 and 10), but for the boost volume, the reverse high suction volume is used to verify the system volume. For each two measurement points, the inlet pressure can be measured at the same time, and the three-pressure gas flow rate of the atmosphere is not allowed. If the test rate is ≤ 5, the three-pressure should be 6! For the period of time, take the average value. If the pressure of the boost volume is too high, the difference between the high and low values of the new volume is recorded.
The time between two gas rate reduction points cannot be exceeded, the minimum is 2mic, the gas flow rate and the oil and gas velocity chamber are measured or calculated with the standard test results recorded in the recording A (standard test results
The test results are shown in the coordinate curve:
1 The relationship between gas flow rate (volume flow rate) and suction pressure: The horizontal axis is the effective test, which represents the suction pressure of the atmosphere or other specifications suitable for the design requirements of the system, and the vertical axis is the vertical axis, which represents the suction rate. h! The relationship between gas flow rate and suction pressure: In the case of excitation On the coordinate graph, the horizontal bar indicates the suction pressure, and the vertical bar indicates the gas flow rate.
&Flow Report
Test Report
\) Instrument model and working conditions in the room
) Type of flange sealing gasket used in the system
c) Type and test data of the system:) Maximum and minimum inlet and outlet humidity of cold water or refrigerant during the test;) Maximum flow rate:
E) Brand and purpose of the system working fluid:
Quantity used and gas flow rate:
JB/T 8472.1-96
b: During the test, the heating power and fluctuation of the system are measured before the pressure is induced:
9 Determination of the ultimate pressure
Description of the diffusion pump! It can measure the vacuum range, so the manufacturer's samples can list or mark out the limit pressure value. For example, if the manufacturer is a group, the limit pressure must be explained. The measurement data and measurement methods of the product must be given. In order to make the measurement results more comparable, only the measurement results can be written. For the method, see Appendix B of this specification: JB/T8472.1-96
Test and calculation of gas flow rate and pumping rate. The test and calculation are in accordance with the standard. 1. The pumping rate of a given gas generation is determined by dividing the gas flow rate of the test oxygen by the average pressure at the specified position of the test device; 5 =
The calculation formula derived from the theoretical and practical calculation of the dynamic speed test of the vertical pump is shown in Figure A on the right, including: Q-.RA
Wu Zhong:
Point:
Micro vacuum system air extraction rate, .75:
Also PV. gas rate of the pump, Pu·Ls;
Test rate refers to the actual micro pressure P: :
The net height of the dropper when it rises, mm: The net rise time is 8
Drop function.2a1./mm.
X - +2V[1 + 2 8U6650V.-2:AV. -AY.A2Test local atmosphere! k;
,.-no building multiplication direction, drip every external height 1mm push stimulus case rapid increase,./mm: Y.-
Before test: the original volume of the tube from the city surface to the micro valve. The test meter measures the internal opening height of the fire tube at the time of opening, m: from - minutes: at time: the net height of the internal reduction: m mouth: busy to the God of the Ling thick (such as transformer oil> dense waste, B/cm. A2 The selection of the dropper capacity and its relationship with the storage liquid are generally used as the storage liquid increase piece. The value of the dropper diameter should be large enough to obtain the ratio to the center. The dropper should be replaced according to the makeup atmosphere. The gas flow rate is taught according to the table as 1. Select 1 dropper capacity selection
center tax room
Pn -L's
Full tube density
>Hu---50o
>50g-.1000
132--223
JB, B472.196
deep air room
Figure A gas transport sinking rate test guest surface
JB/T472.19G
determination of ultimate pressure
(international standard piece
Kai Bing limit, force can be raised by the unique test method: the following is determined by the waste, B1 is busy and the heating is turned on, the work is over 8 hours, and the force value after the limit is read. Read the clothes and record the items, after the actual measurement, the vacuum regulation gas m, except one: T price record the transport number: and recommend the tube connection effect", the mountain two 10m comparison record, times. Finally, this reading method is used as the extreme retreat force spray station report (the unique booster pump is connected to the blue capital of the three students can talk about the intense limit value 2 measurement base limit pressure break month Ke air and its cutting tube. As far as possible, it meets the car standard beach 1.2 city note, old not cold:RA
Wu Zhong:
Point:
Micro vacuum system air extraction rate, .75:
also pump PV.Gas rate, Pu·Ls;
Test rate refers to the actual leveling of micro pressure P::
The net height of the dropper, mm: The net rise time is updated 8
Drop function teaching.2a1./mm.
X - +2V[1 + 2 8U6650V.-2:AV. -AY.A2Test the local atmosphere! k;
,.-no building multiplication direction, drip every external height 1mm push stimulus case rapid increase,./mm: Y.-
Before test: the original volume of the tube from the city surface to the micro valve. The test meter measures the internal opening height of the fire tube at the time of opening, m: from - minutes: at time: the net height of the internal reduction: m mouth: busy to the god of the Ling thick (such as transformer oil> dense waste, B/cm. A2 The selection of the dropper capacity and its relationship with the storage liquid are generally used as the storage liquid increase piece. The value of the dropper diameter should be large enough to obtain the ratio to the center. The dropper should be replaced according to the makeup atmosphere. The gas flow rate is taught according to the table as 1. Select 1 dropper capacity selection
center tax room
Pn -L's
Full tube density
>Hu---50o
>50g-.1000
132--223
JB, B472.196
deep air room
Figure A gas transport sinking rate test guest surface
JB/T472.19G
determination of ultimate pressure
(international standard piece
Kai Bing limit, force can be raised by the unique test method: the following is determined by the waste, B1 is busy and the heating is turned on, the work is over 8 hours, and the force value after the limit is read. Read the clothes and record the items, after the actual measurement, the vacuum regulation gas m, except one: T price record the transport number: and recommend the tube connection effect", the mountain two 10m comparison record, times. Finally, this reading method is used as the extreme retreat force spray station report (the unique booster pump is connected to the blue capital of the three students can talk about the intense limit value 2 measurement base limit pressure break month Ke air and its cutting tube. As far as possible, it meets the car standard beach 1.2 city note, old not cold:RA
Wu Zhong:
Point:
Micro vacuum system air extraction rate, .75:
also pump PV.Gas rate, Pu·Ls;
Test rate refers to the actual leveling of micro pressure P::
The net height of the dropper, mm: The net rise time is updated 8
Drop function teaching.2a1./mm.bzxZ.net
X - +2V[1 + 2 8U6650V.-2:AV. -AY.A2Test the local atmosphere! k;
,.-no building multiplication direction, drip every external height 1mm push stimulus case rapid increase,./mm: Y.-
Before test: the original volume of the tube from the city surface to the micro valve. The test meter measures the internal opening height of the fire tube at the time of opening, m: from - minutes: at time: the net height of the internal reduction: m mouth: busy to the god of the Ling thick (such as transformer oil> dense waste, B/cm. A2 The selection of the dropper capacity and its relationship with the storage liquid are generally used as the storage liquid increase piece. The value of the dropper diameter should be large enough to obtain the ratio to the center. The dropper should be replaced according to the makeup atmosphere. The gas flow rate is taught according to the table as 1. Select 1 dropper capacity selection
center tax room
Pn -L's
Full tube density
>Hu---50o
>50g-.1000
132--223
JB, B472.196
deep air room
Figure A gas transport sinking rate test guest surface
JB/T472.19G
determination of ultimate pressure
(international standard piece
Kai Bing limit, force can be raised by the unique test method: the following is determined by the waste, B1 is busy and the heating is turned on, the work is over 8 hours, and the force value after the limit is read. Read the clothes and record the items, after the actual measurement, the vacuum regulation gas m, except one: T price record the transport number: and recommend the tube connection effect", the mountain two 10m comparison record, times. Finally, this reading method is used as the extreme retreat force spray station report (the unique booster pump is connected to the blue capital of the three students can talk about the intense limit value 2 measurement base limit pressure break month Ke air and its cutting tube. As far as possible, it meets the car standard beach 1.2 city note, old not cold:
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