JB/T 6668-1993 Technical requirements for agricultural outboard engines and propellers
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T6668~6669-93
Agricultural external hanging machine and hanging prize
1993-06-04 Issued
Ministry of Machinery Industry of the People's Republic of China
1994-01-01 Implementation
Mechanical Industry Standard of the People's Republic of China
Agricultural external hanging machine and hanging paddle
Technical conditions
1 Subject content and scope of application
JB/T6668-93
This standard specifies the model, main performance, technical requirements and test acceptance rules of agricultural external hanging machine and hanging paddle (hereinafter referred to as hanging paddle machine).
This standard applies to hanging paddle machines that meet the following conditions: a.
The power of the matching diesel engine does not exceed 22kW.
Matching steel, wire mesh cement and wooden agricultural and fishing boats, the load capacity does not exceed 80t. Transport vessels sailing in inland river B and C navigation areas and fishing vessels in coastal and sheltered sea areas. Direct-connected propellers and propellers with matching diesel engines with a single power exceeding the above range can refer to this. 2 | | tt |
GB11334
GB11365
GB/T13306
GB/T13384
ZB/TB90008.1
ZB/TB90008.2
ZB/TB90008.3
ZB/TB90 008.4
ZB/TB90008.5
Tolerances and fits of common threads
Technical conditions for high-quality carbon structural steel
Dimensions, tolerances and inspections of rectangular splines
Technical conditions for cast aluminium alloys
Technical conditions for cast copper alloys
Tolerances of form and position
Spheroidal graphite castings
Provisions for unmarked tolerances
Technical conditions for alloy structural steels
Technical conditions for aluminium alloy castings
Grey cast iron
Cylindrical worms and worm wheels
Involute cylindrical gears
Cone tolerances
Accuracy of bevel gears and hypoid gears
General technical conditions for packaging of electromechanical products
Cutting and cutting of agricultural machinery Limit deviation of unindicated tolerance dimensions of workpieces Limit deviation of unindicated tolerance dimensions of agricultural machinery castings Limit deviation of unindicated tolerance dimensions of agricultural machinery cold stamping parts Limit deviation of unindicated tolerance dimensions of agricultural machinery sheet metal shearing parts Limit deviation of unindicated tolerance dimensions of agricultural machinery welded structural parts Painting of agricultural machinery
Selection of tolerances and fits of agricultural machinery
Technical conditions for tractor clutch assembly
Approved by the Ministry of Machinery Industry on June 4, 1993
Implementation on January 1, 1994
3 Classification and code
3.1 Classification
JB/T6668-93
Outboard propeller engines are divided into five categories according to the connection form with the matching diesel engine and the shipping method, namely, hanging engine, direct-connected hanging engine, hanging propeller, energy propeller engine and dazzling side thruster.
3.1.1 Hanging machine
The power is a general-purpose diesel engine, which is placed on the top of the transmission box. The power is transmitted through a V-belt or cylindrical gear. The two are suspended together on the ship's outer propulsion device.
3.1.2 Direct-connected hanging machine
The camshaft or crankshaft end of the horizontal shaft or vertical shaft diesel engine directly transmits power to the propeller shaft; the oil pan and the transmission box form an outer propulsion device suspended on the ship's saw.
3.1.3 Hanging propeller
The power is a general-purpose diesel engine, which is placed on the deck of the ship. The power is transmitted to the transmission box suspended outside the saw through a V-belt or coupling. The two form a Z-connected outer propulsion device. 3.1.4 Energy propeller machine
The power and transmission system connection type is the same as that of the hanging propeller. The ship's heading is controlled by the propeller making a rotary motion in the horizontal plane. It is a B-shaped outer propulsion device. Ships with a deadweight of more than 20t often use manual steering gear and remote control systems. 3.1.5 Side thruster
The diesel engine is installed on the side, and the power is directly transmitted from the flywheel end to the propeller shaft through the coupling. A simple propulsion device. 3.2 Model compilation method
The model of the hanging propeller is represented by Chinese pinyin and Arabic numerals. 000-0
Deformation or improvement code (no mark for undeformed, the first deformation is A, the second deformation is A2, and so on)
Main parameters (rated power of the matching diesel engine, kW, retain one decimal place), secondary parameters (installation degree-vertical distance from the lower plane of the frame to the propeller axis, cm) can be marked with a slash after the main parameters
Structural feature code (fixed pitch propeller is not marked, S-upper gear shift, X-lower gear shift, T-adjustable pitch propeller)
Type feature code (G-hanging machine, G J-propeller, GC-side thruster, GZ-direct-connected propeller, GD-energy propeller, D-energy propeller) Category code (7 loading and unloading and transport machinery)
Model example
-8.8/120A2
Second improvement
Matching diesel engine rated power 8.8kW, installation height 120cm lower box shift
Loading and unloading and transport machinery
4 Main performance parameters
4.1 The propeller should be able to work normally under the conditions of 5° longitudinal inclination and 10° transverse inclination of the ship. The design and test conditions of the propeller, full speed sailing speed, bollard pull, fuel consumption, and rotation capacity should all comply with the provisions of Table 1. The power, speed, bollard pull, and fuel consumption of the double propeller are assessed according to the single propeller.
Rated power of main engine
Tonnage of ship
Single ship single propeller no load
Speed\km/h
Full speed fuel
Consumption"
Single propeller positive bollard
Pulling force"
Conversion type
Conversion capacity
Conversion propeller type
≤740
》580
≥700
JB/T6668-93
≤1140
≥850
≤1300
≥10 00
≤120
≤1690
≥1280
≤2040
≤120
≤2980
≥2080
≤3280Www.bzxZ.net
≥2210
≤150
≤4790
≥3040
Note: 1) The no-load speed of a single ship is tested at (100)% of the rated speed of the diesel engine, and the adjustable pitch propeller is tested at (100=)% of the rated speed of the diesel engine and the designed pitch angle; the speed fluctuation value is not greater than 1%. 2) Fuel consumption, except for 2.2, 2.4, 2.9, and 3.7kW, refers to diesel engines without fans and with pre-combustion or vortex combustion chambers; for engines with fans, the value is allowed to increase by 3% and the value of direct injection engines is allowed to decrease by 4%. 3) The tension of the positive bollard is tested at the rated speed of the diesel engine (85±1)%, and the speed fluctuation value is not more than 1%. 4.2 The no-load emergency braking sliding distance should not be more than 3 times the ship length. 4.3 The minimum turning diameter should not be more than 3 times the ship length, and the maximum dynamic heel angle during turning should not be more than 5°. 4.4 When the rudder of the propeller engine (for the propeller type) turns from 35° in one direction to 35° in another direction, the steering time should not exceed 15s. 4.5 The switching time from forward to reverse for fixed pitch propellers shall not exceed 12s, and the adjustment time from positive (or negative) half of the design pitch angle to negative (or positive) half of the design pitch angle for adjustable pitch propellers shall not exceed 12s. The operating force of the shift or pitch adjustment handle shall not exceed 120N. 4.6 When the heading unchanged method is adopted, the full-speed straight-line maneuverability: the energy conversion mode shall not exceed 6 times/min, and the propeller rotation mode shall not exceed 8 times/min. 5 Technical requirements
5.1 General requirements
5.1.1 The propeller hanging machine shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5.1.2 The quality of gray iron castings shall comply with the requirements specified in GB9439. The welding parts of welded parts should be flat and free of welding defects such as burn-through, cracks, and leaks that affect mechanical strength. 5.1.3
5.1.4 Fasteners and operating parts that often work in seawater should be made of corrosion-resistant materials or chrome-plated or galvanized. The coating should be uniform, firmly attached, without pitting, exposed bottom and falling off. 5.1.5 The limit deviations of the uninjected tolerance dimensions of machined parts, castings, cold stamping parts, plate shear parts, and welded structural parts on the drawings shall be in accordance with ZB/TB90008.1～ZB/TB90008.5. 5.1.6 The thread tolerance of the main connection parts shall comply with GB197, with internal thread 7H grade and external thread 6g grade. 5.1.7 The symmetry tolerance of the center plane of the flat key connection shaft groove and the groove shall be manufactured according to the 9 grade specified in the appendix of GB1184. 5.2 Technical requirements for main parts and components
5.2.1 The engine part of the direct-connected hanging machine shall comply with the relevant standards of diesel engines. 3
JB/T6668-93
5.2.2 The friction type main high-speed clutch shall comply with the provisions of NJ398. The clutch driven plate assembly, the holding spring, the clutch cover and the pressure plate assembly shall comply with the relevant standards of the tractor clutch. .5.2.3 Upper and lower housings, intermediate shaft tubes, bearing seats, worm gear boxes 5.2.3.1 Upper and lower housings, intermediate shaft tubes, bearing seats and steering worm gear boxes shall be made of materials with mechanical strength not less than HT200 grey cast iron specified in GB9439.
5.2.3.2 Artificial aging treatment shall be carried out before castings are processed, and intermediate shaft tube welded parts shall be annealed. The method of controlling the amount of cutting in the last few passes may be used instead.
5.2.3.3 The position of the axis of the mounting hole of the housing bevel gear pair shall be selected according to the half value of the 10th grade accuracy in Table 17 of GB11365, and the verticality shall be selected according to the minimum normal backlash of Class b in Table 18. The limit deviation of the center distance of the mounting hole of the worm gear pair, the verticality tolerance of the axis centerline, and the position tolerance of the worm axis to the center plane of the worm gear shall be selected and converted according to the 11th grade accuracy specified in GB10089. 5.2.3.4 After the upper and lower boxes and the intermediate shaft tube are processed, a water pressure test shall be carried out at a pressure of 0.2MPa for 5 minutes. No seepage shall occur.
5.2.4 Transmission shaft system
5.2.4.1 The shaft system shall be made of materials with a mechanical strength not less than 45 steel in GB699. 5.2.4.2 The shaft system diameter shall comply with the provisions of Articles 4.3.4 to 4.3.6 of the "Interim Regulations on Inspection of Inland River Propeller (Engine) Ships" (1985) of the Ship Inspection Bureau of the People's Republic of China.
5.2.4.3 The surface of the oil seal journal of the propeller shaft shall be chrome-plated or subjected to wear-resistant treatment. 5.2.4.47
The spline accuracy shall comply with the general level provisions in GB1144. The taper of the key-connected propeller shaft and propeller hub is 1:15, and the accuracy should comply with the AT11 grade requirements in GB11334. It is recommended that the bottom surface of the keyway 5.2.4.5
be parallel to the axis.
5.2.5 Gears, shift sleeves, worm gears 5.2.5.1
Gears and shift sleeves should be made of 20CrMnTi steel or other low-carbon alloy steel specified in GB3077. When the main clutch or reverse clutch is equipped with a buffer device, it is allowed to be made of materials with mechanical strength not less than 45 steel specified in GB699. 5.2.5.2 The gears and shift sleeves made of 20CrMnTi steel shall be surface carburized, the carburized layer depth shall be 18% of the gear module, the limit deviation is +mm; the decarburized layer depth on the tooth surface shall not exceed 20% of the carburized layer depth; the tooth surface hardness shall be 56~62HRC, the core hardness shall be 33~48HRC, and the tooth surface hardness shall be 52~58HRC. For those made of 45 steel, the quenching and tempering hardness shall be 217~255HB; the tooth surface and tooth surface hardness shall be 45~50HRC. There shall be no cracks on the tooth root and tooth root. 5.2.5.3 The steering worm wheel and worm shall be made of ductile iron with a mechanical strength not less than QT400-18 specified in GB1348 and 45 steel specified in GB699 respectively.
5.2.5.4 The transmission tolerance of cylindrical gears in the power transmission system shall be manufactured in accordance with the 9GJ level in GB10095; the transmission tolerance of bevel gears shall be manufactured in accordance with the 10b level in GB11365; the transmission tolerance of steering worm gears shall be manufactured in accordance with the 11C level in GB10089; the precision and position tolerance of the spline hole of the gearshift sleeve shall be manufactured in accordance with the general level in GB1144. 5.2.6 Propellers
5.2.6.1 The material, heat treatment and blade root thickness of the propeller shall comply with the provisions of Table 2. Other materials may be used without reducing the strength of the propeller.
Material name
Ductile iron
40-3-1 Manganese brass
9-4-4-2 Aluminum bronze
Casting aluminum alloy
Gray cast iron
Note: 1) fo.
QT400-18
QT500-7
JB/T 6668-93
Standard code
GB1348
ZCuZn40Mn3Fel
ZCuA19Fe4Ni4Mn2
MeNylon
Nylon 66
Nylon 6
GB1176
GB1173
GB9439
0.3R Maximum thickness of cross section (keep one decimal place), mmtD-propeller diameter, mm,
Heat treatment
Low-temperature annealing
Low-temperature normalizing
Aging treatment
Aging treatment|| tt||Inspection Items
1o.≥0.022D
to.3≥0.028D
Metal Mold
Sheet 0.025D
1≥0.026D
5.2.6.2 The surface of the blade should be smooth. The total number of holes in each blade of the cast iron propeller shall not exceed 5, and the depth shall not exceed 0.2 times the thickness of the blade at that location. The diameter of a single hole shall not exceed 5mm, and the distance from the edge and the edge of the adjacent hole (normal projection of the blade surface and back) shall not be less than 10mm. The total number of grouped holes on the blade surface and back of the same cross-section shall not exceed 3; the surface defects of cast aluminum (including copper and nylon) pulp shall comply with the provisions of Class II castings C in Article 4.4.7 of GB9438. 5. 2. 6.3
Impact resistance of propeller blades: After the actual ship inertia test, there are no cracks in the propeller blades. The tolerances of propeller geometric parameters are shown in Table 3.
Radius R
Blade section length L
Total average pitch P
Blade pitch P.
Sectional pitch P
Local pitch P
Blade centerline angle
Blade weave skew
±(0.002D+2)
The arc length of the cross section on the pitch plane, at least measure the three load surfaces of 0.5R, 0.7K, and 0.9R
The arithmetic average of the pitches of each blade
When the pitch is equal, it is the arithmetic average of the pitches of each cutting surface; when the pitch is variable, the pitch of the cutting surface at 0.7R is used to measure
Each The arithmetic mean of the local pitch of the carrier surface, at least three sections of 0.5R, 0.7R, and 0.9R are measured
and at least two places are measured on each section (avoiding warping); the crescent-shaped section is measured at fixed points on the section with equal distance from the guide and trailing edges to measure the axial deviation at 0.5R on the center line of the blade surface (D-propeller diameter, mm)
The matching taper of the key-connected hub hole and the propeller shaft is 1:15, and the accuracy should comply with the AT11 grade requirements in GB11334. It is recommended that the bottom surface of the keyway be parallel to the axis; the verticality error of the axis of the blade neck hole on the adjustable propeller hub to the center line of the hub in the axial section shall not exceed 5
JB/T 666893
0.0012D. The position error in the radial plane shall not exceed 0.0015D (D-propeller diameter, mm). 5.2.6.6 Propeller static balance test
Blade tip unbalanced weight:
P≤0.035D
Where: P-blade tip unbalanced weight, mm; D-propeller diameter, mm.
The weight difference of the three blades of the adjustable propeller shall not be greater than 0.5P. b.
The unbalanced weight after the propeller static balance test must be evenly ground on the back of the blade, the position away from the edge is not less than 0.1 times the blade width, and slightly biased to the edge. Local drilling to remove the unbalanced weight is not allowed. 5.2.7 Energy-saving mechanism
5. 2. 7.1
5. 2. 7. 2
5. 2. 7.3
The rudder stock shall be made of materials with a mechanical strength not less than No. 20 steel in GB699. The diameter of the energy rod shall comply with the provisions of Article 3.1.2 of the "Inland Steel Ship Construction Specifications" (1991) of the Ship Inspection Bureau of the People's Republic of China. The thickness of the energy plate shall comply with the provisions of Article 3.1.5 of the "Inland Steel Ship Construction Specifications" (1991) of the Ship Inspection Bureau of the People's Republic of China. 5.2.7.4 The area of the energy plate shall comply with the following formula: Inland waterway energy conversion type:
Inland waterway propeller type:
The area of energy plates in coastal areas is not limited
Where: S-energy area, m;
L---ship full load waterline length, m;
T--ship full load draft. m.
S≥0.035LT
S≥0.015LT
·(2)
5.2.7.5 The transmission gear of the energy machine shall be made of materials with mechanical strength not less than HT250 grey cast iron in GB9439, and its transmission tolerance shall be manufactured according to the 10FH grade precision in GB10095.
5.3 Assembly requirements
5.3.1 All parts shall be inspected and qualified, and outsourced and purchased parts shall be assembled only with a certificate of conformity. 5.3.2 After the bevel gear is assembled, the back cone shall be flush with a tolerance of 0.5mm; the contact spots and side clearance after initial running-in shall comply with the provisions of GB11365: the contact spots and side clearance after initial running-in of the cylindrical gear shall comply with the provisions of GB10095. 5.3.3 When the fixed pitch propeller is in the reverse position and the adjustable pitch propeller is in the zero thrust position, the reverse hook (pin) shall be able to reliably hook the bracket to ensure that the routine operation can proceed normally.
5.3.4 The throttle control, main clutch, gear shifting and pitch change mechanism adjustment, and the operation of the handle or steering wheel should be flexible and reliable. The safety interlocking function of the throttle and gear shift, gear shift and hook, and gear shift and clutch linkage should be guaranteed. 5.4 Appearance and paint
5.4.1 The non-processed exposed black metal surface of the propeller engine must be painted with primer and topcoat. The paint should comply with the TQ-1-NP coating quality index specified in NJ/Z3.
5.4.2 The product appearance should be neat and tidy, and there should be no defects such as rust, bruises and paint residue. 5.5 Transmission box cleanliness
After the no-load test, the total weight of impurities in the upper and lower boxes and the shaft tube should not exceed 16mg/kW. 5.6 Transmission box noise
During the no-load test, the noise of the upper and lower boxes should not exceed 88dB(A). 5.7 Safety protection
5.7.1 The propeller should be equipped with an angle limit device. For the propeller operator, an angle indicator should be set. The zero position pointer is facing 0: the indication error of the angle should not exceed ±2° when the other positions are in the energy position. 5.7.2 The control panel and operating parts should have signs indicating the operating direction of the handle or the energy wheel. Usually, when the energy wheel rotates clockwise, the ship should turn right.
5.7.3 The whole machine should have safety protection measures when it leaves the factory. The exposed moving parts such as pulleys, sprocket chains (except those dragged along the ship), gears, main transmission universal joints, etc. should be equipped with safety covers.
JB/T 6668-93
5.7.4 When the protective drag board is lower than the baseline of the hull, the shaft tube should be able to tilt up or lift up to ensure safe passage. 6 Test and Acceptance Rules
6.1 New products or products with major structural improvements and products produced in a transferred factory must be subject to performance tests and actual ship production tests in accordance with regulations. 6.2 Products produced in batches should be subject to performance tests and reliability tests. The actual ship performance test should be conducted once a year, and the reliability test should be conducted once every two years. Two test prototypes.
6.3 The reliability test of the whole machine bench shall be conducted for a test time of not less than 300 hours; the number of forward and reverse gear shifts shall not be less than 2000 times: the number of main clutch engagements shall not be less than 2000 times; the mean time between failures (MTBF) shall not be less than 60 hours; the effectiveness (A) shall not be less than 95%; the total wear weight of the tooth gear and clutch sleeve shall not exceed the value calculated by the following formula, and there shall be no cracks on the tooth root; the main clutch shall not slip, the separation shall be complete, and the engagement shall be smooth. G≤0.ld.
Where: G—total wear of the tooth gear and clutch sleeve·g; d--diameter of the pitch circle at the midpoint of the tooth gear, mm. +-·（4））
6.4 Gear strengthening test: The number of gear stress cycles shall not be less than 5.0×10°. After the test, the gear shall not have any of the following defectsa.
Tooth root cracks:
Severe pitting on the tooth surface - there is a pitting point at any point, the area exceeds 4mm, the depth is 0.5mm or the single tooth fatigue pit area ratio is greater than b.
Severe wear of tooth thickness - the wear amount reaches the value calculated by the following formula, and the thinning amount of single tooth thickness is greater than 0.5mm (reverse gear is not Zo.06d.
W;= 0.07d
Wherein: W is the total wear after the strengthening test.g: W.—wear of the i-th gear, g;
d,—diameter of the pitch circle at the midpoint of the i-th gear, mm. (5)
If the strengthening test and the bench 300h test use the same pair of gears, the number of stress cycles can be reduced by 20%. The wear is assessed in sections, and the wear of the latter strengthening section should be reduced by 20% compared with the full strengthening. 6.5 Factory operation test of the whole machine
6.5.1 No-load operation test needs to be carried out for each machine. 6.5.2 Load operation test, main clutch static friction torque test and sealing, cleanliness, Gear meshing accuracy inspection, sampling according to the general inspection level of GB2828.
6.5.3 Requirements
6.5.3.1 All transmission parts operate normally, and there shall be no abnormal vibration, impact and loosening of fastening parts. 6.5.3.2 The control system is flexible, accurate and reliable; the main clutch has no slippage, is completely separated, and the engagement is smooth. 6.5.3.3 There is no oil leakage at the seal of the dynamic and static joint surfaces. The oil temperature of the transmission box shall not exceed 80℃ (ambient temperature shall not exceed 35\). 6.5.3.4
6.6 Actual ship production test: the test time shall not be less than 500h and the voyage shall not be less than 3000km . During the test, the main parts must not be damaged, the average trouble-free working time must be not less than 60 hours, the effectiveness must be not less than 95%, and the wear of the toothed gears and clutch sleeves is allowed to increase by 50% compared to the 300-hour bench test.
6.7 The user has the right to sample the product quality in accordance with the relevant provisions of this standard. The number of samples shall be agreed upon by the manufacturer and the user. If the sample results are unqualified, the product shall be doubled for re-inspection. If it is still unqualified, it may not be accepted. 6.8 Under the condition that the user complies with the use and storage rules specified by the manufacturer, if the product is damaged or cannot be used normally due to poor manufacturing quality within one year from the date of delivery, the manufacturer shall provide free of charge for Repair or replacement by the user. 7
Marking, packaging and storage
JB/T6668-93
The product should have a label in a conspicuous position, and the label specifications should comply with the provisions of GB/T13306. The label should indicate (Chinese and English translations for products shipped abroad):
Manufacturer name;
Product name, model and trademark;
Main technical parameters;
Factory number;
Year and month of production.
7.2 The product packaging must comply with the provisions of GB/T13384, and can also be negotiated with the ordering unit to use simple packaging. 7.3 The product should be protected during shipment, and should be loaded and unloaded gently to ensure that the processed surfaces such as splines and threads and the exposed connection parts of the assembly are not damaged.
7.4 A full set of random accessories should be provided when the product leaves the factory, and a packing list and relevant technical documents should be attached. 7.5 The storage place of the product must be dry and well protected from rain. The exposed processed surface of the parts without paint should be sealed with anti-rust oil. Additional remarks:
This standard is proposed and managed by the China Agricultural Mechanization Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Jiangsu Agricultural Machinery Research Institute. The main drafters of this standard are Lu Yuying, Yu Xiaoping, Luan Guoxiang, and Wang Xiaohui. From the date of implementation of this standard, NJ357-85 "Technical Conditions for Farm Boats Hanging Paddles and Hanging Machines" will be invalidated.1 The propeller should be equipped with an energy angle limit device. For those who use energy machine operation, an energy angle indicator should be set. The zero energy position pointer points to 0: the indication error of the energy angle at other energy positions is not more than ±2°. 5.7.2 The control panel and operating parts should have signs indicating the operating direction of the handle or energy wheel. Usually, when the energy wheel rotates clockwise, the ship should turn right.
5.7.3 The whole machine should have safety protection measures when leaving the factory. The exposed moving parts such as pulleys, sprocket chains (except those dragged along the ship), gears, main transmission universal joints, etc. should be equipped with safety covers.
JB/T 6668-93
5.7.4 When the protective drag plate is lower than the baseline of the hull, the shaft tube should be able to be tilted or lifted to ensure safe passage. 6 Test and acceptance rules
6.1 New products or products with major structural improvements and products produced by transferred factories must undergo performance tests and actual ship production tests as required. 6.2 Performance test and reliability test shall be carried out for batch-produced products. Performance test of actual ship shall be carried out once a year, and reliability test shall be carried out once every two years. Two test prototypes shall be carried out.
6.3 Reliability test of whole machine bench, the test time shall not be less than 300h; the number of forward and reverse gear shifting shall not be less than 2000 times: the number of main clutch engagement shall not be less than 2000 times; the mean time between failures (MTBF) shall not be less than 60h; the effectiveness (A) shall not be less than 95%; the total wear weight of tooth gear and clutch sleeve shall not exceed the value calculated by the following formula, and there shall be no cracks on the tooth root; the main clutch shall not slip, disengage completely, and engage smoothly. G≤0.ld.
Where: G—total wear of tooth gear and clutch sleeve·g; d--diameter of pitch circle at the midpoint of tooth gear, mm. +-·（4））
6.4 Gear strengthening test: The number of gear stress cycles shall not be less than 5.0×10°. After the test, the gear shall not have any of the following defectsa.
Tooth root cracks:
Severe pitting on the tooth surface - there is a pitting point at any place, the area exceeds 4mm, the depth is 0.5mm or the single tooth fatigue pit area rate is greater than b.
Severe wear of tooth thickness - the wear amount reaches the value calculated by the following formula, and the thinning amount of single tooth thickness is greater than 0.5mm (reverse gear is not Zo.06d.
W;= 0.07d
Wherein: W is the total wear after the strengthening test.g: W.—wear of the i-th gear, g;
d,—diameter of the pitch circle at the midpoint of the i-th gear, mm. (5)
If the strengthening test and the bench 300h test use the same pair of gears, the number of stress cycles can be reduced by 20%. The wear is assessed in sections, and the wear of the latter strengthening section should be reduced by 20% compared with the full strengthening. 6.5 Factory operation test of the whole machine
6.5.1 No-load operation test needs to be carried out for each machine. 6.5.2 Load operation test, main clutch static friction torque test and sealing, cleanliness, Gear meshing accuracy inspection, sampling according to the general inspection level of GB2828.
6.5.3 Requirements
6.5.3.1 All transmission parts operate normally, and there shall be no abnormal vibration, impact and loosening of fastening parts. 6.5.3.2 The control system is flexible, accurate and reliable; the main clutch has no slippage, is completely separated, and engages smoothly. 6.5.3.3 There is no oil leakage at the seal of the dynamic and static joint surfaces. The oil temperature of the transmission box shall not exceed 80℃ (ambient temperature shall not exceed 35\). 6.5.3.4
6.6 Actual ship production test: the test time shall not be less than 500h and the voyage shall not be less than 3000km During the test, the main parts must not be damaged, the average trouble-free working time must be not less than 60 hours, the effectiveness must be not less than 95%, and the wear of the toothed gears and clutch sleeves is allowed to increase by 50% compared to the 300-hour bench test.
6.7 The user has the right to sample the product quality in accordance with the relevant provisions of this standard. The number of samples shall be agreed upon by the manufacturer and the user. If the sample results are unqualified, the product shall be doubled for re-inspection. If it is still unqualified, it may not be accepted. 6.8 Under the condition that the user complies with the use and storage rules specified by the manufacturer, if the product is damaged or cannot be used normally due to poor manufacturing quality within one year from the date of delivery, the manufacturer shall provide free of charge for the replacement. Repair or replacement by the user. 7
Marking, packaging and storage
JB/T6668-93
The product should have a label in a conspicuous position, and the label specifications should comply with the provisions of GB/T13306. The label should indicate (Chinese and English translations for products shipped abroad):
Manufacturer name;
Product name, model and trademark;
Main technical parameters;
Factory number;
Year and month of production.
7.2 The product packaging must comply with the provisions of GB/T13384, and can also be negotiated with the ordering unit to use simple packaging. 7.3 The product should be protected during shipment, and should be loaded and unloaded gently to ensure that the processed surfaces such as splines and threads and the exposed connection parts of the assembly are not damaged.
7.4 A full set of random accessories should be provided when the product leaves the factory, and a packing list and relevant technical documents should be attached. 7.5 The storage place of the product must be dry and well protected from rain. The exposed processed surface of the parts without paint should be sealed with anti-rust oil. Additional remarks:
This standard is proposed and managed by the China Agricultural Mechanization Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Jiangsu Agricultural Machinery Research Institute. The main drafters of this standard are Lu Yuying, Yu Xiaoping, Luan Guoxiang, and Wang Xiaohui. From the date of implementation of this standard, NJ357-85 "Technical Conditions for Farm Boats Hanging Paddles and Hanging Machines" will be invalid.1 The propeller should be equipped with an energy angle limit device. For those who use energy machine operation, an energy angle indicator should be set. The zero energy position pointer points to 0: the indication error of the energy angle at other energy positions is not more than ±2°. 5.7.2 The control panel and operating parts should have signs indicating the operating direction of the handle or energy wheel. Usually, when the energy wheel rotates clockwise, the ship should turn right.
5.7.3 The whole machine should have safety protection measures when leaving the factory. The exposed moving parts such as pulleys, sprocket chains (except those dragged along the ship), gears, main transmission universal joints, etc. should be equipped with safety covers.
JB/T 6668-93
5.7.4 When the protective drag plate is lower than the baseline of the hull, the shaft tube should be able to be tilted or lifted to ensure safe passage. 6 Test and acceptance rules
6.1 New products or products with major structural improvements and products produced by transferred factories must undergo performance tests and actual ship production tests as required. 6.2 Performance test and reliability test shall be carried out for batch-produced products. Performance test of actual ship shall be carried out once a year, and reliability test shall be carried out once every two years. Two test prototypes shall be carried out.
6.3 Reliability test of whole machine bench, the test time shall not be less than 300h; the number of forward and reverse gear shifting shall not be less than 2000 times: the number of main clutch engagement shall not be less than 2000 times; the mean time between failures (MTBF) shall not be less than 60h; the effectiveness (A) shall not be less than 95%; the total wear weight of tooth gear and clutch sleeve shall not exceed the value calculated by the following formula, and there shall be no cracks on the tooth root; the main clutch shall not slip, disengage completely, and engage smoothly. G≤0.ld.
Where: G—total wear of tooth gear and clutch sleeve·g; d--diameter of pitch circle at the midpoint of tooth gear, mm. +-·（4））
6.4 Gear strengthening test: The number of gear stress cycles shall not be less than 5.0×10°. After the test, the gear shall not have any of the following defectsa.
Tooth root cracks:
Severe pitting on the tooth surface - there is a pitting point at any point, the area exceeds 4mm, the depth is 0.5mm or the single tooth fatigue pit area ratio is greater than b.
Severe wear of tooth thickness - the wear amount reaches the value calculated by the following formula, and the thinning amount of single tooth thickness is greater than 0.5mm (reverse gear is not Zo.06d.
W;= 0.07d
Wherein: W is the total wear after the strengthening test.g: W.—wear of the i-th gear, g;
d,—diameter of the pitch circle at the midpoint of the i-th gear, mm. (5)
If the strengthening test and the bench 300h test use the same pair of gears, the number of stress cycles can be reduced by 20%. The wear is assessed in sections, and the wear of the latter strengthening section should be reduced by 20% compared with the full strengthening. 6.5 Factory operation test of the whole machine
6.5.1 No-load operation test needs to be carried out for each machine. 6.5.2 Load operation test, main clutch static friction torque test and sealing, cleanliness, Gear meshing accuracy inspection, sampling according to the general inspection level of GB2828.
6.5.3 Requirements
6.5.3.1 All transmission parts operate normally, and there shall be no abnormal vibration, impact and loosening of fastening parts. 6.5.3.2 The control system is flexible, accurate and reliable; the main clutch has no slippage, is completely separated, and engages smoothly. 6.5.3.3 There is no oil leakage at the seal of the dynamic and static joint surfaces. The oil temperature of the transmission box shall not exceed 80℃ (ambient temperature shall not exceed 35\). 6.5.3.4
6.6 Actual ship production test: the test time shall not be less than 500h and the voyage shall not be less than 3000km During the test, the main parts must not be damaged, the average trouble-free working time must be not less than 60 hours, the effectiveness must be not less than 95%, and the wear of the toothed gears and clutch sleeves is allowed to increase by 50% compared to the 300-hour bench test.
6.7 The user has the right to sample the product quality in accordance with the relevant provisions of this standard. The number of samples shall be agreed upon by the manufacturer and the user. If the sample results are unqualified, the product shall be doubled for re-inspection. If it is still unqualified, it may not be accepted. 6.8 Under the condition that the user complies with the use and storage rules specified by the manufacturer, if the product is damaged or cannot be used normally due to poor manufacturing quality within one year from the date of delivery, the manufacturer shall provide free of charge for the replacement. Repair or replacement by the user. 7
Marking, packaging and storage
JB/T6668-93
The product should have a label in a conspicuous position, and the label specifications should comply with the provisions of GB/T13306. The label should indicate (Chinese and English translations for products shipped abroad):
Manufacturer name;
Product name, model and trademark;
Main technical parameters;
Factory number;
Year and month of production.
7.2 The product packaging must comply with the provisions of GB/T13384, and can also be negotiated with the ordering unit to use simple packaging. 7.3 The product should be protected during shipment, and should be loaded and unloaded gently to ensure that the processed surfaces such as splines and threads and the exposed connection parts of the assembly are not damaged.
7.4 A full set of random accessories should be provided when the product leaves the factory, and a packing list and relevant technical documents should be attached. 7.5 The storage place of the product must be dry and well protected from rain. The exposed processed surface of the parts without paint should be sealed with anti-rust oil. Additional remarks:
This standard is proposed and managed by the China Agricultural Mechanization Science Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Jiangsu Agricultural Machinery Research Institute. The main drafters of this standard are Lu Yuying, Yu Xiaoping, Luan Guoxiang, and Wang Xiaohui. From the date of implementation of this standard, NJ357-85 "Technical Conditions for Farm Boats Hanging Paddles and Hanging Machines" will be invalid.6 Actual ship production test: the test time is not less than 500h, the voyage is not less than 3000km. The main parts shall not be damaged during the test, the average trouble-free working time shall not be less than 60h, the effectiveness shall not be less than 95%, and the wear of the tooth gear and clutch sleeve is allowed to increase by 50% compared with the 300h test on the bench.
6.7 The user has the right to sample the product quality according to the relevant provisions of this standard. The number of sampling shall be agreed upon by the manufacturer and the user. If the sampling results are unqualified, they shall be doubled for re-testing. If they are still unqualified, they may not be accepted. 6.8 Under the condition that the user complies with the use and storage rules stipulated by the manufacturer, if the product is damaged or cannot be used normally due to poor manufacturing quality within one year from the date of delivery, the manufacturer shall repair or replace it for the user free of charge. 7
Marking, packaging and storage
JB/T6668-93
The product should have a label in a conspicuous position, and the specifications of the label should comply with the provisions of GB/T13306. The label should indicate (Chinese and English translations for products shipped abroad):
Manufacturer name;
Product name, model and trademark;
Main technical parameters;
Factory number;
Year and month of production.
7.2Product packaging must comply with the provisions of GB/T13384. Simple packaging can also be adopted through negotiation with the ordering unit. 7.3Products should be protected during shipment and should be loaded and unloaded gently to ensure that the processed surfaces such as splines and threads and the exposed connection parts of the assembly are not damaged.
7.4When the product leaves the factory, a full set of random accessories should be supplied, along with a packing list and relevant technical documents. 7.5The storage location of the product must be dry and well protected from rain. The exposed processed surfaces of the parts that are not painted should be coated with anti-rust oil and sealed. Additional notes:
This standard is proposed and managed by the China Agricultural Mechanization Science Research Institute, Ministry of Machinery Industry. This standard was drafted by Jiangsu Agricultural Machinery Research Institute. The main drafters of this standard are Lu Yuying, Yu Xiaoping, Luan Guoxiang and Wang Xiaohui. From the date of implementation of this standard, NJ357-85 "Technical Conditions for Farm Boats Hanging Oars and Hanging Machines" will be invalidated.6 Actual ship production test: the test time is not less than 500h, the voyage is not less than 3000km. The main parts shall not be damaged during the test, the average trouble-free working time shall not be less than 60h, the effectiveness shall not be less than 95%, and the wear of the tooth gear and clutch sleeve is allowed to increase by 50% compared with the 300h test on the bench.
6.7 The user has the right to sample the product quality according to the relevant provisions of this standard. The number of sampling shall be agreed upon by the manufacturer and the user. If the sampling results are unqualified, they shall be doubled for re-testing. If they are still unqualified, they may not be accepted. 6.8 Under the condition that the user complies with the use and storage rules stipulated by the manufacturer, if the product is damaged or cannot be used normally due to poor manufacturing quality within one year from the date of delivery, the manufacturer shall repair or replace it for the user free of charge. 7
Marking, packaging and storage
JB/T6668-93
The product should have a label in a conspicuous position, and the specifications of the label should comply with the provisions of GB/T13306. The label should indicate (Chinese and English translations for products shipped abroad):
Manufacturer name;
Product name, model and trademark;
Main technical parameters;
Factory number;
Year and month of production.
7.2Product packaging must comply with the provisions of GB/T13384. Simple packaging can also be adopted through negotiation with the ordering unit. 7.3Products should be protected during shipment and should be loaded and unloaded gently to ensure that the processed surfaces such as splines and threads and the exposed connection parts of the assembly are not damaged.
7.4When the product leaves the factory, a full set of random accessories should be supplied, along with a packing list and relevant technical documents. 7.5The storage location of the product must be dry and well protected from rain. The exposed processed surfaces of the parts that are not painted should be coated with anti-rust oil and sealed. Additional notes:
This standard is proposed and managed by the China Agricultural Mechanization Science Research Institute, Ministry of Machinery Industry. This standard was drafted by Jiangsu Agricultural Machinery Research Institute. The main drafters of this standard are Lu Yuying, Yu Xiaoping, Luan Guoxiang and Wang Xiaohui. From the date of implementation of this standard, NJ357-85 "Technical Conditions for Farm Boats Hanging Oars and Hanging Machines" will be invalidated.
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