Some standard content:
GB/T 2818--2002
This standard is a revision of GB/T2818--1991 "Submersible three-phase asynchronous motors for wells". Compared with GB/T2818-1991, the main technical content of this standard has been changed as follows:
1. The types, parameters, technical requirements, test methods, etc. of single-phase AC asynchronous motors for wells have been added; 2. The power levels corresponding to some frame numbers have been expanded; 3. The requirements for no-load vibration speed have been cancelled. This standard replaces GB/T2818--1991 from the date of implementation. This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Agricultural Machinery Standardization Technical Committee. The drafting units of this standard are: China Agricultural Mechanization Research Institute, Shanghai Electric Science Research Institute. The main drafters of this standard are: Xu Anxiang, Hu Hua, Li Shengnian. This standard was first issued in 1981, revised for the first time in 1991, and revised for the second time in 2002. 132
Housing and Installation Limits
1 Scope
National Standard of the People's Republic of China
Submersible motor for deep wellGB/T2818—2002
Replaces GB/T2818—1991
This standard specifies the types, basic parameters, technical requirements, test methods, inspection rules, marking and packaging of submersible three-phase and single-phase asynchronous motors for deep wells (hereinafter referred to as motors). This standard is applicable to water-filled, oil-filled, dry and shielded motors that are connected to submersible pumps for wells and operate vertically in water.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the new versions of the following standards. GB191--2000 Packaging, storage and transportation pictorial symbols
GB755-2000 Ratings and performance of rotating electrical machines (idtIEC60034-1:1996) GB/T997-1981 Motor structure and installation type code (neqIEC34-7:1992) GB10395.8--1999 Safety technical requirements for agricultural and forestry tractors and machinery Part 8: Irrigation and drainage pumps and pump units GB/T12785-2002 Test methods for submersible electric pumps GB/T13384-1992 General technical conditions for packaging of electromechanical products JB/Z294-1987 Test method for interturn insulation of AC low-voltage motors with scattered windings 3 Type and Basic parameters
3.1 Model
3.1.1 Model representation
The model consists of Chinese phonetic capital letters and Arabic numerals, as follows: QS
Power, kw
-Frame size
Structural type: Y-oil-filled, P-shielded, G-dry, water-filled not markedMotor type: D-single-phase motor, three-phase not marked-Submersible operation
Asynchronous motor
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on 2002-03-10 and implemented on 2002-08-01
3.1.2 Marking example
GB/T 2818—2002
The water-filled submersible three-phase asynchronous motor for wells with a frame size of 200 and a power of 15kW is marked as: YQS200-15
The oil-filled submersible three-phase asynchronous motor for wells with a frame size of 250 and a power of 37kW is marked as: YQSY250-37
The shielded submersible single-phase asynchronous motor for wells with a frame size of 100 and a power of 2.2kW is marked as: YQSDP100-2.2
3.2 The structure and installation type of the motor is IMV3 (see GB/T997). 3.3 The motor rating is a continuous rating based on the continuous working system (S1). 3.4 The rated frequency of the motor is 50Hz, the three-phase rated voltage is 380V, and the single-phase rated voltage is 220V. 3.5 The rated power of the motor shall be as follows: 0.37, 0.55, 0.75, 1.1, 1.5, 2.2, 3, 4, 5.5, 7.5, 9.2, 11, 13, 15, 18.5, 22, 25, 30, 37, 45, 55, 63, 75, 90, 100, 110, 125, 140, 160, 185, 220 kw 3.6
The correspondence between the motor frame number, maximum outer diameter, synchronous speed and rated power shall comply with the provisions of Table 1. Table 1
Frame size
Maximum outer diameter/mm
Synchronous speed/(r/min）
Rated power/kw
0.37,0.55,0.75,1.1,1.5,2.2,33,4,5.5,7.5,9.2,11,13,15,18,53,4,5.5,7.5,9.2,11,13.15,18. 5,22.25,304,5.5,7.5,9.2,11,13,15,18.5,22,25,30,37,4511,13,15,18.5,22,25,30,37,45,55,63,75,90,100,110,12537,45,55,63,75,90,100,110,125,140,160,185,22030,37,45,55,63,75,90,100,110,125,140,16090,100,110,125,140,160,185,220The connection dimensions and tolerances of the motor and submersible pump shall conform to the requirements of Figure 1 and Table 2. 134
GB/T 2818--2002
GB/T2818—2002
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GB/T2818—-2002
3.8 The radial runout of the circumferential surface at the midpoint of the motor shaft extension joint during shaft rotation shall be greater than that specified in Table 3. Table 3
Radial runout limit
Shaft extension diameter
Rolling bearing support
>28～50
60, 70bZxz.net
Note: When the sliding bearing is supported, the radial runout limit does not include the double-sided clearance of the bearing. Sliding bearing support
3.9 The radial runout and end face runout of the flange stop connecting the motor and the pump to the center line of the shaft: for rolling bearing support, it should not be greater than 0.08mm, and for sliding bearing support, it should not be greater than the double-sided clearance of the bearing plus 0.1mm. 4 Technical requirements
4.1 The motor shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.2 Under the following conditions of use, the motor shall be able to operate normally: a) The motor is completely submerged in water, and its submergence depth is not more than 70m; b) The water temperature is not higher than 20℃;
c) The solid content in the water (by mass) is not more than 0.01%; d) The pH value of the water is 6.5 to 8.5;
e) The chloride ion content in the water does not exceed 400mg/L; f) The hydrogen sulfide content in the water is not more than 1.5mg/L, g) The inner cavity of the water-filled motor must be filled with clean water or other aqueous solutions prepared according to the manufacturer's regulations. Note: When the use conditions do not meet the above provisions, the user should reach an agreement with the manufacturer. 4.3 During the operation of the motor, the changes in the power supply voltage and frequency to the rated value and their impact on the motor performance and temperature rise shall comply with the provisions of GB755.
4.4 When the motor power, voltage and frequency are rated, the guaranteed values of the efficiency and power factor of the three-phase motor shall comply with the provisions of Table 4 (water-filled type), Table 5 (oil-filled type) and Table 6 (shielded type), and the guaranteed values of the efficiency and power factor of the single-phase motor shall comply with the provisions of Table 7. When the efficiency is indirectly measured by the rated voltage load method, the stray loss on the copper bar rotor is 1.2%, for cast aluminum rotors, the actual measured value shall be used.
The reference operating temperature of the motor is 50°C for polyethylene, polyvinyl chloride or cross-linked polyethylene windings, 75°C for E or B insulation, and 115°C for F or H insulation. During the type test, the length of the motor lead cable is 5m. 137
Machine frame number
Rated power
rate/kw
GB/T2818—2002
Standardized price
Machine frame number
Rated power
GB/T2818—2002
Table 4 (end)
Power factor
Power factor
Power factor
Machine frame number
Rated power
rate/kw
GB/T 2818—2002
Standard more favorable research
Frame number
Efficiency n/%
Power factorcost
Shielded/oil-filled
Power factor
GB/T2818--2002
Rated power/kw
Water-filled
Power factor
Note: The efficiency of single-phase capacitor-run motor is 3% higher than the table value, and the power factor is 0.93. 1. 5
Efficiency
Power factor
Under rated voltage, the guaranteed value of the ratio of the three-phase motor's stall torque to the rated torque shall comply with the provisions of Table 8, and the guaranteed value of the ratio of the single-phase motor's stall torque to the rated torque shall comply with the provisions of Table 9. Table 8
Rated power/kW
Stalling torque/rated torque
Stalling torque/rated torque
Capacitor operation
Resistor start
4.6 At rated voltage, the minimum torque during the motor starting process shall not be less than 0.8 times the rated torque for motors with a rated power less than 100kW; and shall not be less than 0.5 times the rated torque for motors with a rated power of 100kW and above. 4.7 At rated voltage, the guaranteed value of the motor's maximum torque is 2 times the rated torque. 4.8 At rated voltage, the guaranteed value of the ratio of the motor's stall current to the rated current shall not exceed 10 times for single-phase resistor start motors, and other types of motors shall comply with the provisions of Table 10. Table 10
Rated power/kW
Stalling current/rated current
Note: The rated current value shall be obtained according to the rated power, rated voltage, and the guaranteed values of efficiency and power factor (excluding tolerance). 4.9 The tolerance of the guaranteed value of the electrical performance of the motor shall comply with the provisions of Table 11. Efficiency n a) Indirect method GB/T 2818—2002 Electrical performance name Rated power ≤ 45 kW Rated power > 45 kW b) Direct method Power factor cosp Locked rotor current Locked rotor torque Maximum torque Minimum torque -0. 15 (1n) —0.10 (1—n) —0.15 (1—n) Minimum —0.07 (1cosg)/6 Minimum —0. 02 Maximum 0. 07 Guaranteed value +20%
Guaranteed value -15%, +25%
(Positive tolerance is only specified when the user needs it) Guaranteed value -10%
Guaranteed value -15%
When the water temperature is not higher than 20℃, the temperature rise limit of the motor stator winding (resistance method) shall not exceed the provisions of Table 12. Table 12
Insulation material or insulation grade
Polyvinyl chloride type
Polyethylene type
Cross-linked polyethylene type
Temperature rise limit/K
4.11 After the water-filled motor is immersed in water close to room temperature for 12 hours, the insulation resistance of the stator winding to the casing shall not be less than 150MQ for polyethylene type and cross-linked polyethylene type windings, and shall not be less than the provisions of Table 13 for polyvinyl chloride type windings. The insulation resistance of the stator winding (including signal wire) of oil-filled, dry and shielded motors immersed in water close to room temperature to the housing shall not be less than 100M2.
Water temperature/℃
Insulation resistance/MQ
4.12 When close to the operating temperature, the hot insulation resistance of the stator winding shall not be less than 0.5MQ for water-filled motors and not less than 1Mα for shielded, dry and oil-filled motors. 4.13 The stator winding (including signal wire) of the motor shall be able to withstand a withstand voltage test lasting 1 min without breakdown. The frequency of the test voltage is 50Hz and it shall be a sine wave as much as possible. The effective value of the test voltage for three-phase motors is 1760V, and the effective value of the test voltage for single-phase motors is 1500V. Before the test, the water-filled motor shall be immersed in water close to room temperature for 12 hours. 4.14 The stator winding of the motor (except for those with the conductors directly immersed in water) shall be able to withstand the inter-turn impulse withstand voltage test without breakdown of the inter-turn insulation. The test voltage (peak value) of the single-phase motor is 1800V, and the test voltage (peak value) of the three-phase motor is 2200V for the power of 3kW and below, and 2500V for the power of 3kW and above.
4.15 When the three-phase power supply is balanced, the deviation of any phase of the three-phase no-load current of the motor from the average value of the three phases shall not exceed 10% of the average value of the three phases.
GB/T 2818—2002
4.16 During the inspection test, the no-load and locked-rotor current and loss of the motor shall be within a certain data range, which can ensure that the motor performance meets the requirements of 4.4~~4.9
4.17 After the water-filled or shielded motor is assembled, the inner cavity shall be able to withstand a 0.05MPa pressure test for 5 minutes without leakage. When the oil seal lip of the shaft extension is installed outward, a slight amount of leakage on the shaft extension surface is allowed, but this leakage should not affect the normal progress of the test. After the dry motor and the oil-filled motor are assembled and filled with oil, the inner cavity should be able to withstand a 0.2MPa pressure resistance test for 5 minutes without leakage.
4.18 The downward thrust of the submersible pump that the motor thrust bearing can withstand should not be less than the value specified in Table 14, and the short-term upward pulling force generated when the submersible pump starts that can be borne is 40% of the downward thrust. Table 14
Machine frame number
Ordinary type
High thrust type
300～400
High thrust bearings need to be specially ordered. The performance of the motor using high thrust bearings shall be agreed upon by the user and the manufacturer. When the axial force of the submersible pump exceeds the above provisions, the user shall agree with the manufacturer. 4.19 The motor shall take effective anti-corrosion measures and install sand-proof sealing devices. 4.20 Oil-filled and dry-type motors should have reliable mechanical seals. When used under specified conditions, the leakage of the mechanical seal should not exceed 2.4mL in 24 hours. After the seal oil chamber is filled with oil once, it should be able to run continuously for not less than 3000 hours. 4.21 The basic safety requirements of the motor should comply with the provisions of GB10395.8. 4.22 Under the specified conditions of use, the average trouble-free operation time of the motor should be not less than 2500 hours. 4.23 The motor should preferably be started directly at full voltage. If the user's power capacity is insufficient, reduced voltage starting can also be used. There should be enough time interval between two starts.
4.24 The motor should be assembled completely and correctly, the motor should rotate freely, run smoothly and lightly, without stuck or stagnant phenomena, the nameplate and logo should be complete, the surface paint should be dry and complete, without stains, bumps and cracks, etc. 4.25 The length of the motor lead cable should be at least 2m longer than the length of the submersible pump. 4.26 After the motor is lowered into the well, it should be disassembled and repaired once a year. 4.27 When the order of letters marked on the outlet terminal is the same as the voltage phase sequence direction of the three-phase power supply, the motor generally rotates counterclockwise when viewed from the shaft extension end. However, when necessary in the connection structure with the submersible pump and the water pipe, clockwise rotation is also allowed. 4.28 The motor shaft extension key, operation and maintenance instructions and product certificate should be provided to the user together with each motor. Each motor should be supplied with necessary spare parts.
5 Test methods and inspection rules
5.1 Test methods
The motor performance test methods and the analysis and calculation of the test results shall comply with the relevant provisions of GB/T12785 and JB/Z294. 5.2 Inspection rules
Product inspection is divided into factory inspection and type test. 5.2.1 Factory inspection
5.2.1.1 Each motor must pass the inspection before it can leave the factory, and a product certificate should be attached. 5.2.1.2 Each motor should be inspected and tested. The inspection and test items include: a) Mechanical inspection: assembly, operation, appearance and radial runout, end face runout inspection, and the connection size and tolerance inspection of the motor at the connection with the submersible pump;
Note: Radial runout and end face runout inspection can be spot checked. The spot check method is formulated by the manufacturer. b) Inner cavity pressure resistance test;
Positive assembly
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