Water pump technical conditions

ICS 65.060.35B91JB / T 9780-1999 Technical specifications for water-turbine pump Published on 1999-06-01 Issued on: 2000-01-01 implementation of the State Administration of Machinery Industry Preface This standard is the NJ 152-85 "water pump Technical conditions. "This standard compared with the NJ 152-85, the main technical changes as follows: 1. Cancellation of the vibration and noise requirements, because the turbine pump work submerged in water, submerged depth with the head It is very difficult and unnecessary to measure the vibration and noise in the water.2.It is stipulated in the original standard that the dynamic balance test should be carried out when the rotating speed of rotating parts such as runner and impeller is more than 1800 r / The implementation of more than 10 years, the turbine speed has never reached such a high, therefore, the provisions of dynamic balance test in fact meaningless, this standard removed the original standard balancing requirements .3 deleted the original standard materials, tolerances Requirements, thread tolerance content .4 waterwheel pump is a combination of water turbine and water pump.Water pump standards and turbine, water pump standards are closely related.In recent years, the standards of water turbines and pumps have been carried out repair . Therefore, according to GB / T 15468-1995 "basic technical conditions of turbines", GB / T 10969-1996 "technical conditions of turbine flow passage components" and GB / T 5657-1995 "centrifugal pump technical conditions (Ⅲ)" This standard Improve the technical parameters of some of the flow components and improve the technical warranty period of the water pump products.This standard from the date of implementation instead of NJ 152-85.This standard appendix A is a standard appendix.This standard by the National Agricultural Machinery Standardization Technical Committee proposed and centralized. This standard is drafted by: Fujian Institute of Hydro Turbine Pump, Guangzhou City, the first pump plant. The main drafters of this standard: Ma Xiang Jin, Liang Jianwei, Zhao Baijun. State Administration of Machinery Industry approved the People's Republic of China machinery industry Standard Replacement NJ 152-85 Implementation 1 Scope This standard specifies the technical requirements, test methods, inspection rules and signs, instructions, packaging, transportation, etc. This standard applies to the water pump in line with GB / T 6490.3 Other types of water pump can refer to the implementation of this standard on the output of the hydraulic pump out of the rules, refer to the implementation of GB / T 15468.2 reference standard The following standards include the provisions of this standard In the reference and constitute the provisions of this standard. At the time of publication of this standard, the versions shown are valid. All standards will be revised, the parties using this standard should explore the possibility of using the latest version of the following standards .GB 191-1990 Packaging Storage and transportation Pictorial signs GB / T 2828-1987 batch-by-batch inspection Sampling procedures and sampling tables (for continuous batch inspection) GB / T 6388-1986 shipping package delivery symbol GB / T 6490.2-1986 water pump test Methods GB / T 6490.3-1986 Types and basic parameters of water pump GB / T 9239-1988 Rigid rotor balance quality allowable imbalances GB 9969.1-1998 Industrial Products Manual General GB / T 13306-1991 Label GB / T 13384 -1992 General technical conditions for packaging of electromechanical products GB / T 15468-1995 Basic technical conditions of water turbines GB / T 15613-1995 Test procedures for acceptance of turbine models JB / T 5673-1991 General technical conditions for tractors and machinery for agriculture and forestry 3 Technical requirements Water pump Shall comply with the provisions of this standard, and according to the procedures approved by the drawings and technical documents manufactured .3.1 Performance 3.1.1 The performance parameters of water turbine pumps should be consistent with the provisions of GB / T 6490.3.3.1.2Manufacturers Determine the allowable working range of the hydraulic pump and provide the values ​​of the head, over flow, lift, water flow, power, speed, efficiency, etc. 1.3 The manufacturer shall give: - the suction height of the pump; - Water pump submerged depth and suction pipe submerged depth; - Ming tank diversion chamber layout .3 .2 through flow components The turbine flow passage components should be in accordance with Appendix A (standard appendix) .3 balance transfer Wheels, impellers and other rotating parts should be balanced test Permissible unbalance should be consistent with GB / T 9239-1988 G6.3 level Allow unbalanced torque shall not exceed the calculated value of equation (1): M ≤ eG × 10-6 .............................................. (1) Where: e - allowable imbalance, m; G - balance weight, N; M - allow Balance moment, N · m. When the calculated allowable unbalance moment is less than 0.03 R (N · m), then calculate 0.03 R (N · m), R is the radius of the balance body weight loss part, m.3.4 Pressure parts volute, the top cover, pump body, pump cover and other parts subjected to water pressure should be carried out in accordance with the provisions of hydrostatic test in the course of the test should be no leakage and other anomalies .3.5 Reliability in the provisions of the use of Conditions, the average water turbine pump product Fault working time should not be less than 2 500 h, the whole life of not less than 7 years .3 6 and shaft sleeve 3. 6. 1 axis should have sufficient strength and rigidity to ensure reliable operation of the water pump.3 . 6. 2-axis thread rotation, the shaft should be rotated so that the nut is tightened. Shaft should retain the center hole .3. 6.3 shaft and water lubrication guide bearing mating parts should be hard-ming, coating thickness of 0.08 ~ 0.12 mm.3. 6. 4 bushings should be made of wear-resistant, corrosion-resistant, erosion-resistant materials, the bushings should be reliably fixed to the shaft when assembled .3.7 bearings3.7 water pump bearings Rolling bearings and rubber guide bearings are usually used.3.7.2 Rolling bearing body and all the holes connected to the outside should be able to prevent the entry of water and sediment, as well as the leakage of lubricants .3 7.3 The maximum temperature of the rolling bearing body should not Over 70 ℃ .3 7. 4 The physical properties of rubber bearings should be attached to the relevant state of the bearing rubber standards .3 clearance gap between the rotating parts and static parts clearance should be consistent with Appendix A A5.1.5 and A5 .2.3 Appendix A not specified parts, should consider the working conditions, parts of the material, the gap size should be able to prevent the parts contact, biting and 3 .9 Direction of rotation From the inlet end of the wheel pump impeller, the rotating direction of the rotating wheel is clockwise .3 After the water guiding mechanism of the water guiding mechanism is fully closed, the water leakage in the clearance shall not cause the unit to rotate.3 11 Assembling 3. 11. 1 The components of the water pump should be checked and qualified and cleaned before assembly .3. 11 2 After the assembly of the water pump, hand crank should be uniform, no rubbing phenomenon .3. 11. 3 Parts with parts should be able to ensure interchangeability, installation size of the pump should be consistent with the pattern .3 rust and paint 3.12 1 water pump before assembly and assembly process In the following rust and paint treatment: - flow path and casting non-machined surface rust and oil stains after the anti-rust coating; - bearing body oil storage chamber should be cleaned up the surface, coated with oil-resistant enamel; - internal processing Anti-rust grease on the surface, anti-rust paint on the non-matching surface; - hardened anti-rust oil on the exposed working surface; primer and top coat after removing the rust and oil on the external non-processed surface; After the surface coating, the pump inlet and outlet should be sealed .3. 12 2 paint should be consistent with the provisions of JB / T 5673. 3. 13 monitoring instruments according to the actual To install the following instruments: - water pump pressure gauge; - metal volute pressure gauge; - high head suction pipe pressure gauge; - thermometer .4 test methods 4.1 performance test turbine wheel according to GB / T 6490.2 requirements .4 2 pressure parts of the hydrostatic test at 1.5 times the design pressure test liquid is water at room temperature, dwell time not less than 5 min. 4 balance test of the turbine press GB / T 9239.4.4 reliability test turbine wheel according to the provisions of 6.3 of GB / T 6490.2-1986.5 test rules 5. 1 process test turbine main zero, Department