JB/T 9079.2-1999 JB/T 9079.2-1999 Piston expander performance test method JB/T9079.2-1999 Standard download decompression password: www.bzxz.net

ICS 77.100. 20
Machinery Industry Standard of the People's Republic of China
JBT9079.21999
Piston Expander
Performance Test Methods
Performance Test Methods for Reciprocating Expanders1999-07-12 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9079.2—1999
Performance Test Methods for Reciprocating Expanders" was revised only in accordance with relevant regulations. This standard is an editorial revision of ZBJ76026—90≤Reciprocating Expander, and the main technical content has not changed. This standard replaces ZBJ7602690 from the date of implementation. This standard is proposed and submitted by the Technical Committee for Standardization of Gas and Liquefaction Equipment. Drafting unit of this standard: Handan Oxygen Generator Factory. The main drafters of this standard are Ning Ximan, Cheng Zhusen and Zhao Jianxin. This standard was first issued in October 1990. 【Fang Gu
Machinery Industry Standard of the People's Republic of China
Performauce iest methods for reclprocating expanders This standard specifies the performance test method for piston expanders (hereinafter referred to as piston expanders). This standard is applicable to the performance test of expanders used in air separation and filtration equipment. 2 Referenced Standards
JR/T 9079.2—1999
Substitute ZBJ76026—Q0
The following provisions are included in the standards. The provisions of the standards are constituted by citing them in the standards. This standard is valid for the versions shown in the table. All standards are subject to revision, and the parties using this standard should discuss the possibility of using the latest version of the following standards. GB 3853-1998 Acceptance test of positive displacement compressors GBT4980-1985 Determination of noise level of positive displacement compressors 1 Process method 3 General test
3.1 The test conditions of the expansion performance test are consistent with the conditions specified in the design. The allowable fluctuation range of each operating parameter during the test shall be as specified in the table.
3.3 When the test conditions cannot be consistent with the design conditions due to objective conditions, the fluctuation range of the operating parameters between the operating parameters and the specified values ​​(or deviation) is allowed. Under the conditions specified in the table, the performance of the expansion machine under the design conditions shall be calculated after the test and selection according to the provisions of this standard. The parameters are allowed to be passive ranges
Avoid air pressure
Shaft speed
|Exhaust pressure
Test value
Big frame bias (or bias)
Any one of the most effective analysis
Average enterprise
±'℃
3.3The accuracy of all test equipment and instruments shall comply with the provisions of this standard and be qualified by the metrology department. 3.4The expansion machine test system shall be in accordance with Figure 1. Guohao Machinery Industry Week 1999-07-12 Approved 2000-01-01 1--air conditioner: 2--heater: 3--air conditioner: 4--air conditioner: P,-P
pressure measuring point, t~temperature measuring point, flow measuring channel Q
Figure! Air conditioner test system diagram (heater and low temperature channel insulation layer is not drawn) 3.5 Before the test, all equipment, pipes, pressure measuring points and temperature measuring points in the test system should be checked for tightness. There should be no leakage. .6 The air entering the machine should be purified and its dew point should not be higher than -65°C. 4 Measuring instruments and measuring methods
4.1.1 The location for measuring pressure shall be specified in 1, and the measuring points of each location shall be specified in GB3853. 4.1.2 The gas pressure is generally measured by a pressure gauge, and the pressure gauge accuracy shall be specified in Table 2. In the spray device for measuring the exhaust, the pressure difference before and after the nozzle is measured by differential pressure measurement, and the differential pressure can make the reading accurate to 1mm. The inner diameter of the glass of the single-tube type should be not less than 10, and the double-tube type The diameter of the pressure gauge should not be less than 6mm. The pressure gauge should be selected according to the specified test pressure. The pressure value indicated by the range should be between 1-23 of the full range.
Gauge? Accuracy level of pressure gauge
Department of law
1.1.3 Provisions for pressure measurement point inspection
Gas pressure of expander wwW.bzxz.Net
Inlet and exhaust pressure
4.1.3.1 The inlet pressure measurement point of the expander should be one pipe diameter away from the gas flange of the expander. 4.1. 3.2 The expansion machine exhaust pressure measuring point is located at a distance of one tube diameter from the expansion machine exhaust flange. 4.1.3.3 When there are two pressure measuring points at the same position, the two measuring points are staggered at 90° in the figure. 4.4 The connection of the pressure gauge shall comply with the provisions of GB/T3853. 4.2 Temperature measurement 4.1.1 The temperature change measurement shall be carried out by using a mercury thermometer, thermocouple or resistance temperature meter, and the total measuring position shall be determined. The number of measuring points shall be in accordance with the provisions of GB/T3853. The temperature of the thermometer shall be in accordance with the provisions of Table 3.
Product of Hejinuo
JB/T 9079.2—1999
Table 3 Thermometer Accuracy
Inlet and exhaust temperature
4.2.1 The measuring point of expander inlet and exhaust temperature is twice the pipe diameter away from the expander inlet flange, gross ±10
4.1.3 The sensing part of the thermometer is directly inserted into the fluid. If necessary, the source thermometer casing can be used. The casing wall is steel or stainless steel.
4.2.4 Temperature II The cooling part or casing should be vertically inserted into the fluid. If the diameter of the fluid pipe is small, the reverse flow material can be captured. The depth of the insertion method is at least 13 pipe diameters. The average velocity of the fluid at the measuring point should be less than 30m/s. It is not difficult to pull out the thermometer when reading. 4.3 Exhaust volume measurement shall be in accordance with the provisions of GBT3853, and the continuous measurement shall be in accordance with the provisions of GBT 3B53. 4.5 Coal market measurement
4.5.1 The noise measurement method can be in accordance with the provisions of GB/T4980. 4.5.2 Disc sound measurement 2h-time, the average value of consecutive times is the measurement data: 4.6 Determination of cleaning method
In the cleaning agent, clean the gas, piston, connecting support, crankshaft, crankshaft, upper head, valve and other parts (excluding exposed surface) one by one, filter with a mesh with a base size not greater than 0.1, dry the dirt at 80℃ for 1:3, and then use a large flat scale with a fineness not less than 7, and the weight obtained is the cleanliness index. 5 Test
5, the engine can only be tested after it runs stably under the test conditions. 5.2 In addition to the normal operation given by the necessary source of damage to maintain the test conditions, the test flow shall be adjusted during the test. 5.3 The test flow of the overspeed limit curtain shall be carried out under the intake pressure of the normal working condition. After confirmation, the reverse test shall be repeated three times. 5.4 The instrument attenuation reading shall not be less than 5 times. If the test process makes the variation inevitable, or if some individual readings produce excessive variation, additional readings should be taken and reasonable adjustments should be made.
5.5 The performance test should be performed twice. Each test should have enough readings and the interval time should be selected to ensure the accuracy of the test. 6 Calculation of test results
6.1 Correction of exhaust
6.1. Calculation of correction coefficient is as follows:
Formula: K is the correction coefficient;
ne—design specified speed, Timin;
Yu—speed measured during the test, renin. 6.1.211 The pre-corrected exhaust volume is calculated according to formula (2) Where: F is the corrected exhaust volume, mh
JB/T 9079.2-1999
4h - measured exhaust volume calculated according to the test station, m; K is the correction factor, see formula (1)
6.2 Calculation of equal efficiency
Use 5 groups of test values ​​to calculate according to formula (3), and take the average value Where:
equal extraction efficiency;
actual melting point of expander, J/kg;
equal melting point of expander 1/kg.
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