GB/T 5770-1997 Technical requirements for diesel engine plunger injection pump assemblies
Some standard content:
GB/T 5770---1997
This standard adopts the former Soviet Union national standard "OCT10578-86 "Diesel Engine Fuel Injection Pump-General Technical Conditions" to revise the original national standard GB5770-86 "Diesel Engine Plunger Fuel Injection Pump Assembly Technical Conditions". Considering the consistency of the meaning of technical items, all technical indicators of this standard adopt test values. For example: (1) The average fuel supply base deviation of each cylinder under the calibration condition is changed from the original standard's debugging value of ±1.5% to the test value of ±3%. (2) The unevenness of the fuel supply of each cylinder of the multi-cylinder synthetic fuel injection pump is all test values. At the same time, the original GB5770-86 is retained. The technical content and corresponding technical indicators that are proven to be suitable for my country's national conditions and do not hinder international use and are the same as those in OCT10578 are retained. For example, the limit deviation of the angle between the fuel supply starting point of each cylinder of the multi-cylinder synthetic fuel injection pump and the specified reference cylinder fuel supply starting point is ±30°. The cleanliness of the multi-cylinder synthetic fuel injection pump assembly is tested by the non-disassembly method according to the requirements of JB/T7661-1995 "Limits and determination methods for cleanliness of diesel engine fuel pump nozzles".
This standard specifies the reliability assessment content. This standard will replace GB5770-86 from the date of implementation. This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the Fuel Pump and Fuel Injection Standardization Technical Committee of the Ministry of Machinery Industry. Drafting units of this standard: Wuxi Fuel Pump and Fuel Injection Research Institute of the Ministry of Machinery Industry, Shanghai Pudong Ivy Fuel Injection Co., Ltd., Wuxi Weifu Group Co., Ltd., Beijing Tianwei Fuel Pump and Fuel Injection Co., Ltd., China First Tractor Engineering Machinery Company Fuel Pump Branch, Shanghai Trane Company Fuel Injection and Fuel Pump Factory
The main drafter of this standard: Zheng Pei Na.
This standard is entrusted to the Wuxi Fuel Pump and Fuel Injection Research Institute of the Ministry of Machinery Industry for interpretation. 278
1 Scope
National Standard of the People's Republic of China
Diesel engine plunger fuel injection pump assembly
Technical conditions
Technical requirements for jerk fuel injection pumpGB/T5770—1997
Replaces GB5770--86
This standard specifies the technical requirements, test methods, sampling, marking, packaging, transportation and storage of plunger fuel injection pump assemblies with or without speed regulators for medium and small power diesel engines (hereinafter referred to as injection pumps). This standard applies to injection pumps for medium and small power diesel engines. 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 latest versions of the following standards. GB252—94 Light diesel oil
GB2021—89 Military diesel oil
GB 2828—87
Count sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches)GB 2829--87J
Count sampling procedures and sampling tables for periodic inspection (applicable to inspection of production process stability)GB 8029-87
Diesel engine fuel injection pump calibration oil
JB/T6291.1—92 Technical conditions for piston fuel pump assembly
JB/T 6291.2—92
Test methods for piston fuel pump assembly
JB/T 7173.1---93 =
Technical conditions for plunger coupling of diesel engine fuel injection pumpJB/T 7174.1--93
Technical conditions for diesel engine fuel injection pump delivery valve assemblyJB/T 7661-1995
Product cleanliness limit and determination method for diesel engine fuel pump nozzleReliability assessment and evaluation method for synthetic fuel injection pump assemblyJB/T 51178.1--94
Reliability assessment bench test method for synthetic fuel injection pump assemblyJB/T 51178.2-94
Technical conditions for fuel injection pump test bench
ZB J94 016-90
ZBJ94 017-90 Technical conditions for standard fuel injector assembly for fuel injection pump test bench ZB/TJ94024—90 Technical conditions for delivery and acceptance of diesel engine plunger fuel injection pump assembly 3 Technical requirements
3.1 The fuel injection pump shall be manufactured according to the product drawings and technical documents approved by the prescribed procedures and shall comply with the requirements of this standard. 3.2 When the fuel injection pump uses the fuel specified in GB252 and GB2021 standards, it shall be able to ensure normal operation. 3.3 The fuel supply sequence of each cylinder of the multi-cylinder synthetic fuel injection pump shall be in accordance with the agreement between the user and the manufacturer. 3.4 The fuel supply pre-stroke of the fuel injection pump shall be in accordance with the agreement between the user and the manufacturer. 3.5 The limit deviation of the angle between the fuel supply starting point of each cylinder of the multi-characteristic synthetic fuel injection pump and the specified reference cylinder fuel supply starting point is ±30° camshaft angle.
3.6 The fuel quantity adjustment mechanism of the fuel injection pump shall be flexible and unobstructed. Approved by the State Administration of Technical Supervision on August 26, 1997 and implemented on May 1, 1998
GB/T 5770---1997
3.7 The fuel supply characteristics and limit deviations of the fuel injection pump shall be in accordance with the agreement between the user and the manufacturer. Note: If there is no agreement between the user and the manufacturer for 3.3, 3.4, and 3.7, the relevant documents of the manufacturer shall apply. 3.8 When a multi-cylinder synthetic fuel injection pump and a single-cylinder fuel injection pump for a multi-cylinder diesel engine are tested on a fuel injection pump test bench, the deviation of the average fuel supply of each cylinder under the calibrated working condition from the calibrated value is ±3%. The deviation of the average fuel supply of each cylinder of a multi-cylinder synthetic fuel injection pump from the calibrated value is calculated according to formula (1). QQ
Where: — Deviation of the average fuel supply of each cylinder from the calibrated value, %; Q-Average fuel supply of each cylinder, mL;
Q—Calibrated fuel supply, mL.
× 100%
The single-cylinder fuel injection pump for multi-cylinder diesel engines should have a scale indicating the position of the calibrated fuel supply on the fuel quantity adjustment rod. 3.9 When a multi-cylinder synthetic fuel injection pump is tested on the fuel injection pump test bench, the unevenness of the fuel supply of each cylinder should not be greater than the provisions of Table 1. Table 1 Uneven fuel supply of each cylinder of a multi-cylinder synthetic fuel injection pump Number of fuel injection pump cylinders
Uneven fuel supply of each cylinder 3, %
Calibrated working condition (or maximum torque working condition)
If there are special requirements, it shall be in accordance with the agreement between the user and the manufacturer. The unevenness of the fuel supply of each cylinder of the fuel injection pump is calculated according to formula (2). 2(Qmax - Qmin)
×100%
Qmax +Qmin
Where: —Unevenness of oil supply in each cylinder, %; —Oil supply in the cylinder with the largest oil supply among all cylinders, mL, Qmax
—Oil supply in the cylinder with the smallest oil supply among all cylinders, mL. Qmin
Rapid working conditions
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3.10 The marking method and position of the top dead center or the oil supply starting point of the plunger on the injection pump shall be in accordance with the agreement between the user and the manufacturer or the relevant technical documents.
3.11 There shall be no oil leakage at the sealing parts of the injection pump. 3.12 The cleanliness of the injection pump shall comply with the provisions of 4.1 and 4.5 of JB/T7661. 3.13 The oil delivery pump on the injection pump shall comply with the relevant provisions of JB/T6291.1. Other accessories shall be in accordance with the agreement between the user and the manufacturer or the relevant technical documents.
3.14 The injection pump shall be sealed with lead or paint after commissioning. Under the condition that the user and the manufacturer reach an agreement, the injection pump is allowed to be sealed with lead or paint after individual adjustments on the diesel engine. 3.15 The evaluation method of the reliability assessment of the injection pump shall comply with the provisions of JB/T51178.1. 3.16 If the user complies with the provisions of the instruction manual and the lead or paint seal of the injection pump is intact, the warranty period of the injection pump is one year from the date of shipment, and the cumulative operating time shall not exceed 2000 hours. During the warranty period, the manufacturer shall replace the parts and components damaged due to poor manufacturing (the warranty period of the plunger and the oil delivery valve shall be in accordance with the provisions of 3.13 in JB/T7173.1 and 3.12 in JB/T7174.1). 4 Test method
4.1 Test equipment and test oil
4.1.1 The fuel injection pump test bench shall comply with the relevant provisions of ZBJ94016. 4.1.2 The standard fuel injector assembly used in the fuel injection pump test bench shall comply with the relevant provisions of ZBJ94017. 4.1.3 The fuel injection test oil is GB8029 calibration pump oil. 4.2 Test procedure
4.2.1 Determination of fuel supply pre-stroke
The fuel injection pump does not have a fuel outlet valve spring and a fuel outlet valve. The pressure at the fuel injection pump inlet is 0.015MPa test oil, the test oil flows out from the overflow pipe (with an inner diameter of 2mm and a length of 100mm) through the hole in the oil outlet valve seat. Turn the injection pump camshaft to slowly move the plunger up from the bottom dead center. When the test oil flows out from the overflow pipe port at 8 to 12 seconds per 10 drops, measure the distance from the bottom dead center to this position. 4.2.2 Determination of the interval angle between the oil supply starting point of each cylinder and the oil supply starting point of the reference cylinder. Loosen the standard injector overflow valve of the injection pump test bench, input the test oil with a certain pressure (the pressure is specified by the opening pressure of the oil outlet valve) from the oil inlet of the injection pump, and make it flow out from the injector overflow pipe on the injection pump test bench through the tight seat of the oil outlet valve. Slowly rotate the flywheel of the injection pump test bench, and determine the oil supply starting point at the moment when the oil at the overflow pipe port stops flowing out. Take the oil supply starting point of the reference cylinder as the base point, and measure the interval angle between the oil supply starting point of each cylinder and the oil supply starting point of the reference cylinder according to the oil supply sequence. 4.2.3 Flexibility test of fuel injection pump oil quantity adjustment mechanism Single cylinder pump: When the fuel injection pump plunger is at any position between the top dead center and the bottom dead center, there should be no resistance when pulling the fuel quantity adjustment rod (or adjustment arm).
Multi-cylinder fuel injection pump without speed governor: When the fuel injection pump is in a stationary state, place the fuel quantity adjustment rod in a horizontal position, and slowly move the fuel quantity adjustment rod in the direction of increasing and decreasing fuel in the full stroke range to measure its resistance value. The resistance value range should comply with the provisions of the technical documents approved by a certain procedure.
Multi-cylinder fuel injection pump with speed governor: On the fuel injection pump test bench, fix the fuel injection pump speed governor control handle in the full load position, gradually increase the fuel injection pump speed from the calibrated speed to the fuel stop speed, and then gradually reduce it to the calibrated speed, and measure the fuel supply at the two calibrated speeds before and after. The deviation of the average fuel supply of each cylinder from the previous one should comply with the provisions of the technical documents approved by a certain procedure. 4.2.4 Test of uneven oil supply in each cylinder
4.2.4.1 Supply the injection pump with test oil of specified pressure, and measure the oil flow from the injection pump for a certain number of cycles when the injection pump is adjusted to the specified tie rod (gear rod) position and speed.
4.2.4.2 The oil should have 30 seconds to sink before reading, and the value should be read at the bottom of the meniscus of the oil in the measuring cylinder. When pouring oil, the measuring cylinder stand should be tilted 45° and maintained for 30 seconds.
4.2.5 Test of oil supply characteristics
Fix the governor control handle at the full load position and the idle position respectively, and measure the full load and idle oil supply characteristics of the injection pump. The oil supply measurement point shall be specified in the agreement between the user and the manufacturer. It is allowed to use the method of comparing the sample pumps agreed by the user and the manufacturer to evaluate the oil supply characteristics of the injection pump. The duration of each measurement should ensure that the fuel supply is not less than 20mL. When measuring the idle fuel supply, it should not be less than 5mL. At high speed, the amount of test oil sprayed by the injector should not be greater than one-fourth of the idle fuel supply. 4.2.6 Test of fuel injection pump sealing performance
4.2.6.1 Pass compressed air with a pressure of 0.5MPa at the fuel injection pump inlet (for fuel injection pumps sealed with O-rings between the plunger and the fuel injection pump body, pass compressed air with a pressure of 0.4MPa at the fuel injection pump inlet), close the oil outlet valve and tighten the seat to discharge oil! Then immerse the fuel injection pump in diesel and keep it for 15s. There should be no leakage (a small amount of leakage is allowed at the neck of the plunger). 4.2.6.2 Pass compressed air with a pressure of 0.02MPa at the governor or fuel injection pump vent, then immerse the fuel injection pump in diesel and keep it for 15s. There should be no leakage. A slight leakage is allowed at one position above the center line of the oil quantity adjustment rod (rack). 281.
GB/T 5770 --- 1997
4.2.6.3 During the performance test of the fuel injection pump, oil leakage is not allowed. 4.2.7 Determination of fuel injection pump cleanliness
The method for determining the cleanliness of the fuel injection pump shall comply with the relevant provisions of JB/T7661.4.2.8 The test method for the oil suction vacuum degree of the fuel delivery pump installed on the fuel injection pump and the performance of the hand pressure pump shall comply with the relevant provisions of JB/T6291.2. 4.2.9 The bench test method for the reliability assessment of the fuel injection pump shall comply with the relevant provisions of JB/T51178.2. 5 Sampling
5.1 Each fuel injection pump must be inspected by the manufacturer's quality inspection department according to 3.5, 3.6, 3.8 and 3.9, and can only leave the factory after passing the inspection. 5.2 The inspection sampling rules and the judgment of whether it is qualified or not shall be in accordance with the relevant provisions of GB2828. The technical sampling rules for type inspection and the judgment of whether it is qualified or not shall be in accordance with the relevant provisions of GB2829. 5.3 The user's acceptance shall be in accordance with the relevant provisions of ZB/TJ94024. 6 Marking, packaging, transportation and storage
6.1 Marking
Each fuel injection pump shall be marked in a prominent position: a) manufacturer's name;
b) product name;
c) trademark
d) product model or mark;
e) manufacturing date or production batch number.
The marking shall remain clear and recognizable during the service life. 6.2 Packaging
6.2.1 The fuel injection pump should be equipped with various protective parts (shields, caps, etc.) to prevent the inner cavity from being contaminated. 6.2.2 The fuel injection pump shipped separately from the diesel engine should be packed in a solid packaging box lined with moisture-proof material. Fully ensure that the fuel injection pump will not be damaged or damp during transportation.
6.2.3 For fuel injection pumps used as spare parts, each packaging box should have a product certificate and factory documents signed by the inspection personnel. The outer surface of the packaging box should be marked with:
a) Product name;
Product model;
Product certificate;
Standard number;
Manufacturer's factory mark or trademark;
Quantity,
Manufacturer name;
h) Packing date (year
month),
i) Transportation protection mark.
6.3 Transportation
The packaging should fully ensure that the fuel injection pump is not damaged or damp during transportation. 6.4 Storage
The fuel injection pump should be stored in a dry warehouse and should not be stored together with acids, alkalis and other chemicals that can cause corrosion. Under normal storage conditions, the manufacturer should ensure that the product will not rust within one year from the date of leaving the factory. 2824MPa compressed air), close the oil outlet valve and tighten the seat to discharge oil! Then immerse the fuel injection pump in diesel and keep it for 15s. There should be no leakage (a small amount of leakage is allowed at the neck of the plunger pair). 4.2.6.2 Pass 0.02MPa compressed air through the governor or fuel injection pump vent hole, then immerse the fuel injection pump in diesel and keep it for 15s. There should be no leakage. A small amount of leakage is allowed at the part above the center line of the oil adjustment rod (rack). 281.
GB/T 5770 --- 1997
4.2.6.3 During the fuel injection pump performance test, no oil leakage is allowed. 4.2.7 Determination of fuel injection pump cleanliness
The method for determining fuel injection pump cleanliness shall comply with the relevant provisions of JB/T7661.4.2.8 The test method for the oil suction vacuum degree and hand pressure pump performance of the fuel injection pump installed on the fuel injection pump shall comply with the relevant provisions of JB/T6291.2. 4.2.9 The bench test method for fuel injection pump reliability assessment shall comply with the relevant provisions of JB/T51178.2. 5 Sampling
5.1 Each fuel injection pump must be inspected by the manufacturer's quality inspection department in accordance with 3.5, 3.6, 3.8, and 3.9, and can only be shipped after passing the inspection. 5.2 The inspection sampling rules and the judgment of whether it is qualified or not shall comply with the relevant provisions of GB2828. The sampling rules for type inspection technology and the judgment of whether it is qualified or not shall comply with the relevant provisions of GB2829. 5.3 The user's acceptance shall comply with the relevant provisions of ZB/TJ94024. 6 Marking, packaging, transportation and storage
6.1 Marking
Each fuel injection pump shall be marked with the following in a prominent position: a) manufacturer's name;
b) product name;
c) trademark
d) product model or mark;
e) manufacturing date or production batch number.
The marking shall remain clear and recognizable during the service life. 6.2 Packaging
6.2.1 The fuel injection pump shall be equipped with various protective parts (shields, caps, etc.) to prevent the inner cavity from being contaminated. 6.2.2 The fuel injection pump shipped separately from the diesel engine shall be packed in a sturdy packaging box lined with moisture-proof material. Fully ensure that the fuel injection pump will not be damaged or damp during transportation.
6.2.3 For fuel injection pumps used as spare parts, each packaging box shall have a product certificate and factory documents signed and stamped by the inspection personnel. The outer surface of the packaging box should be marked with:
a) product name;
product model;
product certificate;
standard number;
factory logo or trademark;
quantity,
name of manufacturer;
h) packing date (year
month),
i) transportation protection mark.
6.3 Transportation
The packaging should fully ensure that the fuel injection pump is not damaged or affected by moisture during transportation. 6.4 Storage
The fuel injection pump should be stored in a dry warehouse and should not be stored together with acids, alkalis and other chemicals that can cause corrosion. Under normal storage conditions, the manufacturer should ensure that the product will not rust within one year from the date of leaving the factory. 2824MPa compressed air), close the oil outlet valve and tighten the seat to discharge oil! Then immerse the fuel injection pump in diesel and keep it for 15s. There should be no leakage (a small amount of leakage is allowed at the neck of the plunger pair). 4.2.6.2 Pass 0.02MPa compressed air through the governor or fuel injection pump vent hole, then immerse the fuel injection pump in diesel and keep it for 15s. There should be no leakage. A small amount of leakage is allowed at the part above the center line of the oil adjustment rod (rack). 281.
GB/T 5770 --- 1997
4.2.6.3 During the fuel injection pump performance test, no oil leakage is allowed. 4.2.7 Determination of fuel injection pump cleanliness
The method for determining fuel injection pump cleanliness shall comply with the relevant provisions of JB/T7661.4.2.8 The test method for the oil suction vacuum degree and hand pressure pump performance of the fuel injection pump installed on the fuel injection pump shall comply with the relevant provisions of JB/T6291.2. 4.2.9 The bench test method for fuel injection pump reliability assessment shall comply with the relevant provisions of JB/T51178.2. 5 Sampling
5.1 Each fuel injection pump must be inspected by the manufacturer's quality inspection department in accordance with 3.5, 3.6, 3.8, and 3.9, and can only be shipped after passing the inspection. 5.2 The inspection sampling rules and the judgment of whether it is qualified or not shall comply with the relevant provisions of GB2828. The sampling rules for type inspection technology and the judgment of whether it is qualified or not shall comply with the relevant provisions of GB2829. 5.3 The user's acceptance shall comply with the relevant provisions of ZB/TJ94024. 6 Marking, packaging, transportation and storage
6.1 Marking
Each fuel injection pump shall be marked with the following in a prominent position: a) manufacturer's name;
b) product name;
c) trademark
d) product model or mark;
e) manufacturing date or production batch number.
The marking shall remain clear and recognizable during the service life. 6.2 Packaging
6.2.1 The fuel injection pump shall be equipped with various protective parts (shields, caps, etc.) to prevent the inner cavity from being contaminated. 6.2.2 The fuel injection pump shipped separately from the diesel engine shall be packed in a sturdy packaging box lined with moisture-proof material. Fully ensure that the fuel injection pump will not be damaged or damp during transportation.
6.2.3 For fuel injection pumps used as spare parts, each packaging box shall have a product certificate and factory documents signed and stamped by the inspection personnel. The outer surface of the packaging box should be marked with:
a) product name;
product model;
product certificate;
standard number;
factory logo or trademark;
quantity,
name of manufacturer;
h) packing date (year
month),
i) transportation protection mark.
6.3 Transportation
The packaging should fully ensure that the fuel injection pump is not damaged or affected by moisture during transportation. 6.4 Storage
The fuel injection pump should be stored in a dry warehouse and should not be stored together with acids, alkalis and other chemicals that can cause corrosion. Under normal storage conditions, the manufacturer should ensure that the product will not rust within one year from the date of leaving the factory. 282
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