This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of light and small diesel engine-pump direct-connected units. JB/T 6665.2-1993 Technical requirements for light and small diesel engine-pump direct-connected units JB/T6665.2-1993 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T6665.1~6665.2-93
Light and small diesel engine-pump direct-coupled unit
Issued on June 4, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1994
Mechanical Industry Standard of the People's Republic of China
Light and small diesel engine-pump direct-coupled unit
Technical conditions
1 Subject content and scope of application
JB/T 6665.2-93
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of light and small diesel engine-pump direct-coupled units.
This standard is applicable to light and small diesel engine-ticket direct-connected units (hereinafter referred to as units) with flow rates of 8~170m/h, lifts of 7~60m, and matching powers of 2.21~11.03kW.
2 Reference standards
GB2828
GB3216
GB5084
GB7377
GB/T13306
ZBJ91001
JB/T6665.1
JB/T6664.2
JB/T6663.2
JB/T6664.3
3 Technical requirements
3.1 Basic requirements
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) Centrifugal pumps, mixed flow pumps, axial flow pumps And vortex ticket test method Farmland irrigation water quality standard
Truck tire series
General diesel engine technical conditions
Light and small diesel engine-pump direct-connected unit
1 Type and basic parameters
Self-priming pump technical conditions
Light and small single-stage centrifugal pump technical conditions
Self-priming pump
Self-priming performance test method
3.1.1 The unit shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 3.1.2 The unit shall be able to work normally under the conditions of conveying clean water with a temperature not exceeding 40°C or water specified in GB5084. 3.1.3 The power reserve coefficient of the diesel engine of the unit is 1.1~1.4. 3.1.4 The unit should have good field mobility. The total weight of the hand-lifted unit should not exceed 100kg; the wheel tires of the trolley-type unit should comply with the provisions of GB7377, and the outer diameter of the new tire should not be less than 500mm, and the cross-sectional width should not be less than 37mm. 3.1.5 The frame of the unit should have sufficient strength. 3.2 Performance requirements
The performance parameters of the unit should comply with the provisions of JB/T6665.1. 3.3 Fuel consumption rate
The fuel consumption rate of the unit under rated conditions should not exceed the specified value of JB/T6665.1. 3.4 Matching requirements
3.4.1 Matching water pump
The matching self-priming pump shall comply with the provisions of JB/T6664.2; a.
b. The matching light and small single-stage centrifugal pump shall comply with the provisions of JB/T6663.2. 3.4.2 Matching diesel engine
The matching diesel engine shall comply with the provisions of ZBJ91001. Approved by the Ministry of Machinery Industry on June 4, 1993
Implemented on January 1, 1994
3.5 Connection requirements
JB/T 6665.293
3.5.1 The coupling of the unit shall be selected according to actual use and shall have sufficient strength and rigidity. 3.5.2 The fasteners shall be connected reliably and shall not be missing or loose. 3.6 Assembly quality
3.6.1 All parts must be inspected and qualified (outsourced parts, purchased parts, matching parts and standard parts should have quality certificates) before assembly.
3.6.2 The rotating parts of the assembled unit should rotate flexibly without obstruction. 3.7 Appearance quality
The outer surface of the unit should be free of stains and rust, and the matching water pump and diesel engine should meet the requirements of the relevant standards. 3.8 Safety
The exposed rotating parts of the unit should have reliable protective devices. 3.9 Reliability
3.9.1 Failure
According to its cause and the degree of impact on the normal operation of the unit, it is divided into four categories: a.
Fatal failure: Failure that endangers and causes personal injury or death or the unit is scrapped; Serious failure: The main parts are seriously damaged and cannot be eliminated in a short time by replacing wearing parts and accompanying tools: c. General fault: product function declines, which can be eliminated in a short time by replacing wearing parts and accompanying tools; Minor fault: does not affect product function and use requirements, and can be easily eliminated without disassembling the machine. d.
3.9.2 Mean time to first failure
When the unit is operated under rated conditions, the mean time to first failure (MTTFF) should be no less than 300h. 4 Test method
4.1 General requirements
4.1.1 The accuracy of various equipment and instruments used in the test should meet the measurement accuracy requirements. 4.1.2 The test equipment and instruments used in the test should have a valid calibration certificate. 4.1.3 The test medium, environment, temperature, etc. should comply with the relevant standards. 4.1.4 During the test, each data must be accurate and reliable. If abnormal data is found, the cause must be analyzed and handled in time. 4.2 Performance test
The performance test of the unit shall be carried out in accordance with the provisions of GB3216. 4.3 Reliability test
The unit should be operated under rated conditions to assess its reliability. During the test, the number of replacement and repair times of parts and the corresponding actual working time (minor failures are not counted) should be recorded during the operation time. 4.3.2
During the test, flow rate, pressure, speed, lubricating oil temperature, medium temperature and leakage at the seal should be recorded every 12 hours. 4.3.3
4.3.4The average working time before the first failure is calculated according to formula (1): Zt, +t
MTTFF-
Where: MTTFF
Average working time before first failure, h;
t,. The sum of working time of each test unit when the failure occurs for the first time, h:t. \- The sum of working time of each test unit without failure, h; (1)
Note: ① When the test adopts the timed cut-off method, the test (cut-off) time shall be in accordance with Article 3.9.2. At this time, if T, 0 occurs, r, = 1 shall be used for calculation. ② When the test adopts the fixed number stop method, the test shall be carried out until \≥ stop, \ is the total number of test units. The number of test units that have the first failure during the test. r,
4.4 Fuel consumption rate measurement
4.4.1 The unit is operated under rated conditions, and the fuel consumption of the diesel engine is measured. The number of measurements shall not be less than two times, and the first time the difference is not less than 9
JB/T shall be taken. 6665. 2-93
Calculate the arithmetic mean of two consecutive point values ​​within 2%. 4.4.2 The fuel consumption is measured by weight method. When measured by manual instrument, each measurement time shall not be less than 60s; when measured by automatic instrument, each measurement time shall not be less than 30s.
4.4.3·The fuel consumption rate is calculated according to formula (2): G
Where: g--unit fuel consumption rate, g/(kW·h); G--unit fuel consumption under rated operating conditions, g/h; P. —unit output power under rated operating conditions, kW.4.5 Self-priming performance test (only for self-priming units) The self-priming performance test shall be carried out in accordance with the provisions of JB/T6664.3. 5 Inspection rules
5.1 Basic requirements
5.1.1 Each product shall be inspected and qualified by the inspection department and accompanied by a product certificate and The accessories can be shipped out of the factory. 5.1.2 Inspection is divided into factory inspection and type inspection. 5.2 Factory inspection
Inspection items:
Appearance quality inspection;
Assembly quality inspection;
Safety inspection;
Field mobility inspection: Hand-lift inspection Unit gross weight: Handcart inspection Wheel and tire main dimensions: Determination of specified performance;
Determination of fuel consumption rate;
Inspection of connection quality.
5.2.2 Sampling inspection and judgment and disposal rules shall comply with the provisions of GB2828. The inspection level can be the general inspection level ", the qualified quality level (AQL) is 4.0, the inspection batch is the monthly (or daily) output of the product or the order batch at one time, and the normal inspection is a sampling plan; it can also be determined by negotiation between the supplier and the ordering party.
5.3 Type inspection
The items of type inspection are all the technical requirements specified in this standard. Type inspection should be carried out in any of the following situations: trial production and finalization of new or old products; after formal production, if there are major changes in structure, materials, and processes that may affect product performance; when batch production is carried out to understand the stability of product quality, periodic inspection is carried out; when the product is resumed after a long period of suspension;
When the factory inspection results are significantly different from the last type inspection: when the national quality supervision agency proposes a type inspection requirement. The sampling and judgment and disposal rules of type inspection shall comply with the provisions of GB2828. A normal inspection one-time sampling plan is adopted, the special inspection level is S-1, the qualified quality level (AQL) is 6.5, and the sample size is at least 2 units. 6 Marking, packaging, transportation and storage
6.1 Marking
6.1.1 Signage
6.1.1.1 Signage shall comply with the relevant provisions of GB/T13306 and be fixed in appropriate locations. 10
The contents of the signage shall be as follows:bZxz.net
Product name and model:
Specified flow, m/h;
Specified head, m;
Rated power, kW;
Speed, r/min;
Manufacturer name;
Factory number and date;
Product weight, kg
Overall dimensions, mm.
The unit shall have an obvious direction mark.
Packing mark
6. 1. 3.1
The packing mark should be neat and clear, and the content is as follows: the name of the shipping station and the manufacturer;
the name of the receiving station and the receiving unit;
the product name, model and quantity:
the overall dimensions, mm;
the gross weight, kg:
the necessary storage and transportation instructions.
Packaging and transportation
JB/T6665.2-93
The packaging of the unit shall be determined by negotiation between the supply and demand parties, but it shall be ensured that it will not be damaged due to poor packaging under normal transportation conditions. The packaging shall be waterproof, and the exposed machined surface of the product shall be coated with anti-rust grease before packaging. The following random documents and accessories shall be attached when packaging: packing list;
the product certificate;
the product instruction manual;
the necessary random accessories.
6.3 Storage
6.3.1 The units that have passed the inspection should be placed in a dry and well-ventilated finished product warehouse. For temporary outdoor storage, measures such as rain and moisture protection should be taken. 6.3.2 All units that have been stored for more than 12 months must be inspected and repackaged. Guarantee matters
When the user uses the product according to the requirements of the product manual, if the product is damaged or cannot work normally due to poor manufacturing within six months from the date of delivery by the manufacturer, the manufacturer shall repair or replace parts (except wearing parts) for the user free of charge. If the two parties have a dispute over the quality of the product, it shall be submitted to the relevant quality supervision department for arbitration. Additional remarks:
This standard was proposed and coordinated by the China Agricultural Mechanization Science Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Drainage and Irrigation Machinery Research Institute of Jiangsu Institute of Technology and Zhejiang Electromechanical Design Institute. The main drafters of this standard are Wang Yang, Zhang Mingguang, Lin Min, and Xu Youyi. 11
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