Some standard content:
ICS.23-080
National Standard of the People's Republic of China
GB/T14794—2002
Recommended GB/T5235—1988.GR/T14794—1993 Steam Reciprocating Pump
Steamreciprucatingpunp
2002-04-09 Issued
People's Republic of Chinabzxz.net
General Administration of Quality Supervision, Inspection and Procurement
2002-10-01 Implementation
GBT14794—2002
? Specification reference documents
3 Type and basic parameters
4 Technical requirements ....
5 Test methods and inspection rules
5 Standard, packaging and storage
A (informative appendix) Basic wood number
B (informative appendix) Steam reciprocating test equipment Appendix (material appendix) Error analysis and calculation method Appendix D (material appendix) Steam reciprocating carbon test record table: times
GB/T14794-2002
This standard is a combination of B/T2351988 Steam red reciprocating residual test method GB/11474-1993 Steam annual development pump 5, 310-1X54 Steam reciprocating hot beat pump technical conditions 3. 1-! Compared with GB1794-195 and JB1052-1585, the three standards have the following improvements: the content and applicable scope of the above standards have been unified; the original Appendix A, Appendix B and Appendix D in B/T5245 have been reorganized into Appendix 15, Appendix C and Appendix I; the original Appendix C in G11/T9235 has been cancelled; the Table 1 in 3/144 has been modified into Appendix A; the pump delivery unit 1/m in 8.2b of GB14754 has been modified into min1. The GB/T0235-1988 standard has been replaced by GB/T14794-1993. The Appendix A, Appendix B and Appendix C of this standard are informative appendices. This standard is under the jurisdiction of the National Standardization Technical Committee of the State Council, and the author of the standard is Baoji Water Conservancy and Hefei General Machinery Research Institute. The drafters of the semi-standard are Ma Haixiang and Zhang Shenglu. 1 Standard
Steam pump
GH/T14/942002
This standard specifies the type and basic parameters, technical requirements, acceptance methods and inspection rules, marking, packaging and storage of general steam pumps and steam pumps.
This standard is used to transport clean water with a flow rate not higher than 110 and a flow rate not exceeding 850m/s and other fluids with similar petrochemical properties.
This standard applies to steam pumps for conveying petroleum products with a temperature not higher than 400℃. The filter gas system with an age of not less than -40°C can be used in this standard.
The abbreviation "pump" in the text of this standard refers to the general steam chain reciprocating, hot oil and gas reciprocating. 2 Normative references
The clauses in the following documents become the case of this standard through reference in this standard. For any dated reference, all subsequent static amendments (excluding errors) are not applicable to the technical standard. However, the parties to the agreement based on this standard are encouraged to study and report the use of the latest versions of these documents as soon as possible. For any undated reference, its updated version applies to this standard GB 6414-1999 Casting Component size tolerance and machining allowance (e158062: 1994) (B/9069-1988 Determination of noise power level by T-process method negigIS054551980
GB/T9112-2000) Steel Zhida Lan type season and Thai number GB/T94391988 Dongqing missing parts
G/T133061991 Label
GB/T13384-1992 General technical conditions for packaging of electromechanical products 134297-1992 Pump product coating JB/9190-1999 Capacity leasing and compounding. Component hydraulic and cross-hole test 3 types and basic parameters
3. 1 Types are divided into horizontal and vertical types. 3.2 The basic parameters of cooling are listed in Appendix A. Table A1 is the basic parameters of hot steam reciprocating system, and Table A2 is the basic parameters of steam reciprocating hot oil system: 4 Technical requirements 4.1 The pump should meet the requirements of this standard and be manufactured in accordance with the drawings and technical specifications approved by the specified engineering department or technical agreement (contract). 4.2 When the intake pressure increases to 113 of the rated value, the system should be able to work normally, but the cumulative operating time within 2 hours should not exceed 114.3 When the pump is running under rated conditions, the noise should not exceed %dBA). 4.4 Under the specified working conditions, the performance indicators shall meet the following requirements: a) The flow rate shall be 95% to 110% of the rated value; b) The system pressure shall not be lower than the specified value.
4.5 The installation requirements of the external equipment shall meet the requirements of GB/T9439, and the size difference of the chain parts shall not exceed the CT13 belt specified in GB/T6414-1999.
.6 The cylinder body, cylinder block, connecting parts, center frame and valve stem shall be treated to eliminate internal stress. 4.7 The elastic force of the cylinder shall be checked, and the radial force or tangential force shall be rated at an average ratio of 0.C2~3.05MP. GA/T14794-2002
4. The cylinder ring with a diameter equal to or greater than 15cm shall be of the same shape. 4.9 All parts and components that bear the pressure of the piston or the air shall be subjected to the pressure test. The verification method shall comply with the relevant provisions of JB/T090. 4.1 The raw materials and purchased parts shall have the certificate of conformity. All assembly parts (including outsourced parts) shall be assembled only after they have passed the inspection. Parts that are rusted, deformed, etc. due to reasons such as maintenance shall not be assembled. 4.11 During assembly, the interface of the chamber ring shall avoid the steam channel and shall be mutually staggered. The staggered angle height shall be distributed according to the number of piston rings, etc. 4.12 The flange connection dimensions shall comply with the provisions of GB 9112 or the requirements of the application. 4.13 The painting before the system should comply with the provisions of JBT427. 4.14 After the factory inspection, the water in the pump should be removed, anti-rust treatment and surface paint should be applied, and the suction port, discharge port, inlet and exhaust port should all be covered with a plate. 4.15 The supply of the complete pump should include: a) one system with the light distribution #; b) special tools necessary for disassembly and assembly, including: b) various parts and quantity: c) station rate, gold | |tt||One half of the total number of valve plates and valve seats
Valve springs: one half of the total 1
The above new parts shall be supplied according to the contract if they need to be increased. The first overhaul period of the 4.16 valve shall be no less than 130001, and the packing life shall be no less than 110011. The leakage of the cylinder when it is exhausted shall not exceed 0.01% of the rated reduction during the effective life, and the bottle rated flow rate shall not exceed 20 drops min when it is below 10m/h. 2. Under the conditions specified in the product description, within 18 months from the date of delivery (a total of 12 pieces>), if the product is damaged or does not work properly, the manufacturer shall be responsible for replacing or repairing it for the user free of charge. 5. Test methods and inspection rules
5.1 Each system shall be inspected and qualified by the quality inspection department and shall be accompanied by a product certificate before leaving the factory. 5.2 The types of inspection are divided into three categories: type test, spot check test and factory test. 5-2.7 Type or test
R) New products are subject to plastic test!
1 For new series of products, only the basic prototype of the series is subject to type inspection. 5.2.2 Random inspection
) Products produced in batches shall be subject to random inspection and testing, which shall be conducted at least once a year, with one unit (referring to products of the same specification) being inspected each time, and the interval between each inspection shall not be less than three months. If the inspection results do not meet the requirements of Chapter 1, the product shall be doubled for repeated inspection. If it still fails, the whole batch shall be inspected. 5.2.3 Delivery inspection
) Generally, each unit is tested in the factory. For products with large batches (more than one unit per month), advanced process and quality standards (referring to products with a return rate of less than 2%), random inspection is allowed. The number of units drawn shall not be less than 5% of the batch, but not less than 2 units (referring to products of the same specification). If the products are not in compliance with the requirements of Chapter 1, they shall be subjected to delivery inspection one by one. If the return rate in the inspection is lower than 10%, the delivery inspection can be carried out in the random inspection mode.
5.2.4. Various test items of the series shall be carried out in accordance with the provisions of Table 1: 2
Test safety
Test operation, etc.
Load front running test
Frequency test
Combined test
Lubrication performance verification
Note performance verification
Overspeed test
Most resistant test
Noise production test
Test types
Permitted: Indicates the test to be carried out according to the table) It is necessary to express and verify the meaning of the test device 5.3 Test device
5.3.1 General requirements
GH/T147947002
5.3.1 The medium used in the test is generally 300~300% water. If the system has clear requirements for the test medium, it shall be carried out in accordance with the requirements. 5.3.1.2 The allowable stress of the discharge section shall correspond to the maximum discharge pressure caused by the test medium (the maximum stress is the pressure caused by the test method).
5.3.1.3 The joints of the suction circuit are not leaking properly, so that some external air can enter the circuit. 5.3.2 The principle of the device is generally shown in Figure B.
5.4 Test method
5.4.1.1 The test shall be carried out on the test pipe that meets the requirements of 5.3. 5.4..2 When the available natural gas or air under the test device is not sufficient to test the pump under rated conditions, a steam or air drive system with sufficient speed and force should be used, but the pressure ratio should reach the design value. The continuous operation test is completed with steam. 5.4.1.3 is the test of the measurement parameters. The readings of the measuring instruments and level gauges shall comply with the provisions of Table 2. Table 7
Check the micro
Exhaust force
Love human
Infection health
Allowed by the handling range
* When the measurement case is used in the secondary efficiency calculation of the system, the plan is subject to this limit, and the measurement variable
Components
Steam
Sufficient dynamic range
5.4.1. During the test, confirm that the system operation has reached a stable state. Under the specified working conditions, all instruments are read and recorded at the same time. Each test parameter is measured at least 3 times. The arithmetic mean is taken as the measured value. 5.4.1.5 Test data and calculation results. All should be recorded in the test record sheet and compiled and reported. 5.4.2 Measurement accuracy
5.4.2.1 The measurement error range specified in the test is the measured error range calculated based on these data. It is called There is a big difference between the performance and the case performance: error analysis and stop method without appendix 5.4.2.2 The measuring receiver and the test error of the receiving table shall ensure that the measured quantity error is not greater than the provisions of Table 3. And all measuring instruments shall be within the effective range and have been calibrated by the relevant department or business department. 5.4.2.3 The total loss of the system after verification shall not exceed the period specified in Table 1 and Table 4. 5.4.3 Trial operation shall be carried out on each unit and the trial operation time shall be no less than 15 minutes. 5.4.3.2 The test run is mainly to check the assembly quality and test the pump. 5.4.3-3 During the test run, the sound, vibration, lubrication, temperature rise and leakage of the pump should be normal. 5.4.4 Load running test
The load running test of the pump should be carried out after the test run is completed. The pump should be operated at the rated pressure difference and rated system speed for 21 minutes. Check and record the time specified in 5.4.5.2.
5.4.5 Continuous running test
5.4.5.1 Continuous running test After the test run is completed, the pump should be operated continuously at the rated pressure difference and rated system speed for 500 minutes. During the operation, the time of stopping due to wearing parts should be deducted: if the pump stops due to abnormal stops or needs to be repaired, the time will not be accumulated as continuous running time.
5.4.5.2 During the test, the flow rate, pressure (inlet and exhaust pressure, suction and discharge pressure), pump speed, leakage and medium density should be recorded regularly (usually 4h~8h).
5.4.5.3 The test should record the life of the wearing parts, the number of times they need to be replaced and the maintenance time. After the test, the system should be dismantled and inspected to record the damage and damage of the system and components.
5.4.6 Performance or test
5.4.6.1 The performance test of the pump should determine the relationship between the flow rate, power, system efficiency and pressure difference, and draw the performance curve. 5.4.6.2 The performance test of the system should be carried out at the maximum rated system speed: the pressure difference starts at the minimum and then rises by 35%, 5%, 1% and 1% of the rated pressure difference value. At each high pressure, the liquid density, sodi, flow rate, steam pressure and liquid pressure values are measured and recorded at the same time. 5.4.7 Adjustment performance test
5.4.1 The adjustment performance test shall determine the relationship between flow rate, power, pump efficiency and pressure difference: 5.4.7.2 The adjustment performance test shall be carried out under rated minimum (or differential) conditions: the pump shall be tested at five (including minimum and maximum) system speeds from minimum to maximum. The test delays shall be evenly distributed. At the same time, the values of flow rate and steam pressure shall be measured and recorded. 5.4.8 Cavitation performance test
CBT14794—2002
5-4.B.1 The cavitation performance test shall determine the relationship between flow rate and net stop suction pressure (NPSH), and provide the required net positive suction head (NPSHr):
5.4.B.2 The cavitation performance test shall be carried out under rated non-exhaust pressure and expansion pump conditions. NPSH starts from the maximum value that can be established when the valve is fully opened, then measure each value and then gradually reduce VPSH until the flow rate is 55%~10% lower than the normal flow rate. The test point should be no less than 8 points. When the spring is close to cavitation, the interval between test points should be appropriately reduced. 5.4.8.3 NPSH is determined according to the flow rate drop of the system. 5.4.9 Overspeed test
The overspeed test is carried out at 125% of the rated pump speed of the ticket card, and the non-discharge pressure is not less than the set discharge pressure for at least 1min. The pump should operate normally.
5.4. Pre-slow speed test
Minimum system speed test The minimum speed at which the source can maintain normal rotation under rated discharge pressure shall be measured. 5.4.11 Acoustic test The rapid acoustic test of the residual shall be carried out in accordance with GB, D06. 5.5 Parameters and regulations for the accuracy of measuring instruments 5.5.1 Flowmeter
5.5.1.1 The flowmeter shall be measured by volumetric method, mass method or flow method. ) When measuring the flow by the daily test method (i.e. measuring the time required to fill a certain volume) The relative limit error of the calibration instrument shall not be less than c.5%, and the commercial blood shall be at least 200mmlb) When measuring the flow by the hood method (i.e. measuring the body mass within a certain time interval), the sensitivity of the scale shall be less than 0. :
Center) When measuring the flow by the ventilator, the flow meter shall ensure the flow of the liquid into the throttling point is stable: Flowmeter: Type: Random inspection test level 1-factory test number 1.5 level.
5.5.1.2 When measuring the flow rate, the timing device or the guide device shall be electrically or mechanically connected to the meter, the level measuring device, and the flow reversing device to ensure synchronization between the two: 5.5.1.3 When measuring the flow rate by volumetric method, flow rate method and digital flowmeter, the time interval shall be at least 20 days. 5.5.1.4 When measuring the time by mathematical rate meter or other timing instruments, the cumulative number of reciprocating times of oxygen can be used to replace the time measurement. The relative error of the timing or meter should not be greater than 1%. 5.5. Pressure and vacuum
5.5.2.1 The pressure and vacuum shall be measured by spring pressure gauge, vacuum gauge, water differential pressure gauge, pressure transmitter or other pressure gauge. 5.5.2.2 The accuracy of the pressure measurement gauge shall not be less than the following specifications:) Type and inspection test: 1.5 level at the end, 1 level at the side; 1) Factory test: Steam end 2 load, filter 1.5 level. 5.52.3 The location of the pressure hole is not set on the non-outlet and inlet side, and the branch pipe is 4 times the diameter of each, and the distance from the discharge (or suction) flange surface is 2 times the diameter. The distance from the high discharge to the pipeline door should be 6 times the discharge or suction head, and should not be less than 3;. In the case of air, the pressure should be measured on the air chamber. 5.5.2.4 The pressure hole should be as shown in Figure 1. The axis of the hole should be perpendicular to the inner wall of the pipe. There should be no burrs or flying objects. The surface should be smooth and level. The angle between the pressure hole and the inner wall should be maintained: the diameter of the pressure hole is 2mm~-6mm or equal to 1/U of the diameter, whichever is smaller, and the depth should not be less than times the diameter.
GB,T14794—2002
Inquiry
General diameter (take the small letter of the two)
Event type
Emperor (autumn and then paste Niuzhi small surface)
5.5.2.5 Due to the size of the system, the test device must be tested within the time limit, and it is not allowed to install a straight pipe of 4 diameter, or -. If it is necessary to measure it in the same way as on-site, it can also be measured by the flange or its nearby flange: 5.5.2.6 When the pressure is not higher than atmospheric pressure, the air in the connection on the side of the pressure gauge must be exhausted. Fill the test device description, only this instruction is used. When the pressure is low, the pressure measuring hole of the pressure gauge should be filled with air to purify the test body, and the reading of the instrument indication value 5.5.2.7 In order to reduce the dynamic damping when the pressure (or air) is reduced, the minimum value of the dynamic range 2/point is taken as the measurement value 5.5.2.8 The selection of the range of the pressure gauge should make the indicated average value 1/3~3/3 of the full range. 5.5.3 Temperature
5.5.3.1 The temperature of the medium group and the temperature of the pump parts should be measured with glass mercury thermometer, thermoelectric thermometer, electrothermal thermometer, and semi-thermal thermometer, and the error is greater than the center.
5.5.3.2 The temperature measurement point should be set at the place where the temperature field has the smallest momentum, the best heat transfer, and the heat dissipation is gentle. 5.5.3.3 When measuring the density of the medium in the discharge (or suction) pipeline, the temperature part of the meter should be placed in the medium. 5.5.3.4 When measuring the density of the medium in the renal and metal circulation pipeline, the meter should be installed in the flow direction or at an angle of 15° against the flow direction. 5.5.4 Residual speed
5.5.4.1 Residual speed should be measured by a tachometer, photoelectric tachometer, digital tachometer or other instrument with a stopwatch. 5.5.4.2 The system can also be used to measure the system within a certain period of time. 5.5.4.3 The time required for measuring oil volume and pump speed is the same as that for measuring pump speed, and they should be carried out synchronously. 5.5.4.4 When the time required for measuring oil volume and pump speed is different, measure the parameters required for measuring for the shortest time interval (within another effective measurement time interval) and collect the arithmetic half mean as the measurement value. 5.5.5 Data processing 5-1 Flow rate (=) under the test system speed should be calculated as follows: Capacity method
Solo method
. The flow rate under the test cumulative speed, the unit is meter per hour (m\h): The measurement time requires, the corresponding time between the measurement and the measurement, the unit is small (kz): The mass of liquid passing through the device within the time interval, the unit is meter per hour (m--- the mass of liquid passing through the device in half the time interval, the unit is gram per cubic meter (ks/m\)b) When the test speed is different from the rated speed, the following formula is used for conversion Q=Q2
Where:
Converted to the volume under rated pump speed, the unit is gram per hour (m\/h): 2--The flow rate under test speed, the unit is meter per hour (n/h)n
Rated pump speed, the unit is per minute (min-): Test pump speed, the unit is per minute (min-1). 5.5.5.2 Pressure gauge (pressure gauge) The discharge pressure shall be calculated according to the following formula (see Figure 2): Basic pressure gauge P = G. - 10-'pgZ
Discharge pressure, unit is MPa MP!
Pump discharge pressure gauge indicator number, unit is MPa MP:) Density of the conveyed liquid, unit is dry gram per cubic meter (kg/m\); The vertical distance from the center of the pressure gauge to the reference surface (see Figure 2), unit is mm; GB/T14794-2002
Indicator back
For the reference surface
When the sensor is used to measure megabars, Z is the vertical distance from the pressure point to the reference surface. When the center of the pressure gauge or the reference measuring point is lower than the reference surface, Z. Negative value
Horizontal pump base plane: horizontal plane including the cylinder axis Vertical pump reference plane: horizontal plane including the midpoint of the cylinder (or live pump) stroke Gravity acceleration, unit is meter per second (m). b! Suction force is calculated according to the following formula,
1 When using elastic pressure (no Figure 3)
GA/T14794—2002
is the reference plane
, =G, + 1U-p
Introduced pressure, unit is megapascal (MPa)
G,--the reading of the vacuum gauge at the inlet, unit is megapascal (MPa)--the density of the conveying body, unit is kilogram per cubic meter (kg/m2)
The vertical distance from the center of the pressure gauge to the reference plane, unit is (m2)When the center of the pressure gauge is lower than the reference plane, 2 is negative x--the gravity added force, unit is meter per square second (m/2)When the state spring vacuum gauge (see Figure 4)G
p,=G,+10-egz,
Intake pressure, unit is (MPa)
The reading of the vacuum gauge at the pump inlet, unit is megapascal (MTa): The density of the conveying body, unit is kilogram The unit of vertical distance from the pressure measuring point to the datum is meter (m): 2.
When the pressure point is lower than the datum plane, 2 is a negative value. The unit of annual acceleration is water per second squared (m/s*). 3) Use water pressure gauge (see Figure 5)
Wherein,
precision
-n0186g+10pgz.
One, suction pressure, the unit is megapascal (MPa), - water root difference meter reading, the unit is meter (m) 0 - the density of the test liquid, the unit is gram per cubic meter (g/m\); 2
The vertical distance from the pressure measuring point to the datum is meter (m) When the pressure measuring point is lower than the datum plane, 2 is a negative value. The pressure difference is calculated by pressing the pressure, the unit is megaphase (MP=), p=p
When high air is generated,
=(GG)+ 10 (ZZ)
Juice: When 10-/109. 1u "egz-Z> can drop sharply, when the atmosphere is small:
=(G.—G.)+10-pg(%-z,)(using the elastic formula)=(Gg+0.0136)110g2.-z)using mercury pressure gauge) 5.5.5.3 System speed
measurement results Calculate the number of trips:
Wuzhong:
a system rate, in years (mi\):
point - male certificate reciprocating number
(— measurement time interval, in minutes (m certificate). 5.5.5.4 Power
The efficiency of the system is calculated using the following formula: P
The effective power of the pump, in kilowatts (kw); pressure gain, in megapascals (MPa);
GB/T 14794—2002
..-{11 3
-( t3)4 When the time intervals required for measuring oil volume and pump speed are different, the time interval required for measurement is shortened, and the arithmetic half mean is collected as the measured value. 5.5.5 Data Processing
5- 5- 5-1 Flow rate
=) under the test system speed should be calculated as follows: Capacity method
Solo method
. The flow rate under the test cumulative speed, the unit is meter per hour (m\h): The measurement time requires, the corresponding time between the measurement and the measurement, the unit is small (kz): The mass of liquid passing through the device within the time interval, the unit is meter per hour (m--- the mass of liquid passing through the device in half the time interval, the unit is gram per cubic meter (ks/m\)b) When the test speed is different from the rated speed, the following formula is used for conversion Q=Q2
Where:
Converted to the volume under rated pump speed, the unit is gram per hour (m\/h): 2--The flow rate under test speed, the unit is meter per hour (n/h)n
Rated pump speed, the unit is per minute (min-): Test pump speed, the unit is per minute (min-1). 5.5.5.2 Pressure gauge (pressure gauge) The discharge pressure shall be calculated according to the following formula (see Figure 2): Basic pressure gauge P = G. - 10-'pgZ
Discharge pressure, unit is MPa MP!
Pump discharge pressure gauge indicator number, unit is MPa MP:) Density of the conveyed liquid, unit is dry gram per cubic meter (kg/m\); The vertical distance from the center of the pressure gauge to the reference surface (see Figure 2), unit is mm; GB/T14794-2002
Indicator back
For the reference surface
When the sensor is used to measure megabars, Z is the vertical distance from the pressure point to the reference surface. When the center of the pressure gauge or the reference measuring point is lower than the reference surface, Z. Negative value
Horizontal pump base plane: horizontal plane including the cylinder axis Vertical pump reference plane: horizontal plane including the midpoint of the cylinder (or live pump) stroke Gravity acceleration, unit is meter per second (m). b! Suction force is calculated according to the following formula,
1 When using elastic pressure (no Figure 3)
GA/T14794—2002
is the reference plane
, =G, + 1U-p
Introduced pressure, unit is megapascal (MPa)
G,--the reading of the vacuum gauge at the inlet, unit is megapascal (MPa)--the density of the conveying body, unit is kilogram per cubic meter (kg/m2)
The vertical distance from the center of the pressure gauge to the reference plane, unit is (m2)When the center of the pressure gauge is lower than the reference plane, 2 is negative x--the gravity added force, unit is meter per square second (m/2)When the state spring vacuum gauge (see Figure 4)G
p,=G,+10-egz,
Intake pressure, unit is (MPa)
The reading of the vacuum gauge at the pump inlet, unit is megapascal (MTa): The density of the conveying body, unit is kilogram The unit of vertical distance from the pressure measuring point to the datum is meter (m): 2.
When the pressure point is lower than the datum plane, 2 is a negative value. The unit of annual acceleration is water per second squared (m/s*). 3) Use water pressure gauge (see Figure 5)
Wherein,
precision
-n0186g+10pgz.
One, suction pressure, the unit is megapascal (MPa), - water root difference meter reading, the unit is meter (m) 0 - the density of the test liquid, the unit is gram per cubic meter (g/m\); 2
The vertical distance from the pressure measuring point to the datum is meter (m) When the pressure measuring point is lower than the datum plane, 2 is a negative value. The pressure difference is calculated by pressing the pressure, the unit is megaphase (MP=), p=p
When high air is generated,
=(GG)+ 10 (ZZ)
Juice: When 10-/109. 1u "egz-Z> can drop sharply, when the atmosphere is small:
=(G.—G.)+10-pg(%-z,)(using the elastic formula)=(Gg+0.0136)110g2.-z)using mercury pressure gauge) 5.5.5.3 System speed
measurement results Calculate the number of trips:
Wuzhong:
a system rate, in years (mi\):
point - male certificate reciprocating number
(— measurement time interval, in minutes (m certificate). 5.5.5.4 Power
The efficiency of the system is calculated using the following formula: P
The effective power of the pump, in kilowatts (kw); pressure gain, in megapascals (MPa);
GB/T 14794—2002
..-{11 3
-( t3)4 When the time intervals required for measuring oil volume and pump speed are different, the time interval required for measurement is shortened, and the arithmetic half mean is collected as the measured value. 5.5.5 Data Processing
5- 5- 5-1 Flow rate
=) under the test system speed should be calculated as follows: Capacity method
Solo method
. The flow rate under the test cumulative speed, the unit is meter per hour (m\h): The measurement time requires, the corresponding time between the measurement and the measurement, the unit is small (kz): The mass of liquid passing through the device within the time interval, the unit is meter per hour (m--- the mass of liquid passing through the device in half the time interval, the unit is gram per cubic meter (ks/m\)b) When the test speed is different from the rated speed, the following formula is used for conversion Q=Q2
Where:
Converted to the volume under rated pump speed, the unit is gram per hour (m\/h): 2--The flow rate under test speed, the unit is meter per hour (n/h)n
Rated pump speed, the unit is per minute (min-): Test pump speed, the unit is per minute (min-1). 5.5.5.2 Pressure gauge (pressure gauge) The discharge pressure shall be calculated according to the following formula (see Figure 2): Basic pressure gauge P = G. - 10-'pgZ
Discharge pressure, unit is MPa MP!
Pump discharge pressure gauge indicator number, unit is MPa MP:) Density of the conveyed liquid, unit is dry gram per cubic meter (kg/m\); The vertical distance from the center of the pressure gauge to the reference surface (see Figure 2), unit is mm; GB/T14794-2002
Indicator back
For the reference surface
When the sensor is used to measure megabars, Z is the vertical distance from the pressure point to the reference surface. When the center of the pressure gauge or the reference measuring point is lower than the reference surface, Z. Negative value
Horizontal pump base plane: horizontal plane including the cylinder axis Vertical pump reference plane: horizontal plane including the midpoint of the cylinder (or live pump) stroke Gravity acceleration, unit is meter per second (m). b! Suction force is calculated according to the following formula,
1 When using elastic pressure (no Figure 3)
GA/T14794—2002
is the reference plane
, =G, + 1U-p
Introduced pressure, unit is megapascal (MPa)
G,--the reading of the vacuum gauge at the inlet, unit is megapascal (MPa)--the density of the conveying body, unit is kilogram per cubic meter (kg/m2)
The vertical distance from the center of the pressure gauge to the reference plane, unit is (m2)When the center of the pressure gauge is lower than the reference plane, 2 is negative x--the gravity added force, unit is meter per square second (m/2)When the state spring vacuum gauge (see Figure 4)G
p,=G,+10-egz,
Intake pressure, unit is (MPa)
The reading of the vacuum gauge at the pump inlet, unit is megapascal (MTa): The density of the conveying body, unit is kilogram The unit of vertical distance from the pressure measuring point to the datum is meter (m): 2.
When the pressure point is lower than the datum plane, 2 is a negative value. The unit of annual acceleration is water per second squared (m/s*). 3) Use water pressure gauge (see Figure 5)
Wherein,
precision
-n0186g+10pgz.
One, suction pressure, the unit is megapascal (MPa), - water root difference meter reading, the unit is meter (m) 0 - the density of the test liquid, the unit is gram per cubic meter (g/m\); 2
The vertical distance from the pressure measuring point to the datum is meter (m) When the pressure measuring point is lower than the datum plane, 2 is a negative value. The pressure difference is calculated by pressing the pressure, the unit is megaphase (MP=), p=p
When high air is generated,
=(GG)+ 10 (ZZ)
Juice: When 10-/109. 1u "egz-Z> can drop sharply, when the atmosphere is small:
=(G.—G.)+10-pg(%-z,)(using the elastic formula)=(Gg+0.0136)110g2.-z)using mercury pressure gauge) 5.5.5.3 System speed
measurement results Calculate the number of trips:
Wuzhong:
a system rate, in years (mi\):
point - male certificate reciprocating number
(— measurement time interval, in minutes (m certificate). 5.5.5.4 Power
The efficiency of the system is calculated using the following formula: P
The effective power of the pump, in kilowatts (kw); pressure gain, in megapascals (MPa);
GB/T 14794—2002
..-{11 3
-( t3)The unit is meter (m). When the pressure measuring point is lower than the base surface, 2 is a negative value. The pressure difference is calculated by pressing the pressure, and the unit is megaphase (MP=), p=p
When high pressure is generated,
=(GG)+ 10 (ZZ)
Juice: When 10-/109. 1u "egz-Z> can drop sharply, when the atmosphere is small:
=(G.—G.)+10-pg(%-z,)(using the elastic formula)=(Gg+0.0136)110g2.-z)using mercury pressure gauge) 5.5.5.3 System speed
measurement results Calculate the number of trips:
Wuzhong:
a system rate, in years (mi\):
point - male certificate reciprocating number
(— measurement time interval, in minutes (m certificate). 5.5.5.4 Power
The efficiency of the system is calculated using the following formula: P
The effective power of the pump, in kilowatts (kw); pressure gain, in megapascals (MPa);
GB/T 14794—2002
..-{11 3
-( t3)The unit is meter (m). When the pressure measuring point is lower than the base surface, 2 is a negative value. The pressure difference is calculated by pressing the pressure, and the unit is megaphase (MP=), p=p
When high pressure is generated,
=(GG)+ 10 (ZZ)
Juice: When 10-/109. 1u "egz-Z> can drop sharply, when the atmosphere is small:
=(G.—G.)+10-pg(%-z,)(using the elastic formula)=(Gg+0.0136)110g2.-z)using mercury pressure gauge) 5.5.5.3 System speed
measurement results Calculate the number of trips:
Wuzhong:
a system rate, in years (mi\):
point - male certificate reciprocating number
(— measurement time interval, in minutes (m certificate). 5.5.5.4 Power
The efficiency of the system is calculated using the following formula: P
The effective power of the pump, in kilowatts (kw); pressure gain, in megapascals (MPa);
GB/T 14794—2002
..-{11 3
-( t3)
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