Some standard content:
ICs27,020
Machinery Industry Standard of the People's Republic of China
JB/T9746.1—1999
Marine gearboxes
Technical conditions
Marine gearboxesSpecifications1999-09-17 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
JE/T9746.1—1999
This standard is a revision of the technical conditions of marine gearboxes in NJ336-84. Compared with NJ336-84, this standard adds non-torque, noise, cleanliness and controllability assessment indicators, and the original standard specifies the mechanical efficiency to be changed to no-load power consumption rate. This standard replaces NI336-84 from the date of implementation. Appendix A and Appendix C of this standard are the appendixes of the standard. This standard is compiled and maintained by the National Technical Committee for Standardization of Internal Combustion Engines. Technical standard drafting unit: Hangzhou Qianjin Gearbox Group Co., Ltd. (Hangzhou Gearbox Factory) Drafting persons of this standard: Xing Huaxing, Ma Zhenlian, Yi Louguang, etc. The standard was first issued in 1984 and replaced NJ33-84. This standard specifies the technical requirements, test results, inspection regulations, marking, packaging and storage of marine gearboxes (hereinafter referred to as gearboxes) and their variants.
This standard is applicable to the main structure of the wet-type clutch transmission, column gear transmission, and the gearbox with forward and reverse, two-way and speed reduction functions. For other types of gear components that do not have appropriate standards, this standard can be used for implementation. 2 Reference standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard. When this standard is published, the versions shown are all valid. All standards will be revised. Parties using parallel standards should explore the possibility of using the latest versions of the following standards: G 1922—1980
GBT282—1997
Solvent oil
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of consecutive batches) Gold wire woven mesh test sieve
GB/T 6003.1—19973
GE/T6404—1986
GB/T 1]572—[9B9
IB/T $1127—1999
3 Technical requirements
Method for determining the sound and dynamic level of mutual noise of wheel assembly
Bench test method for section gearbox
General technical parts for packaging of electromechanical products
Reliability test of small and medium-sized power oil engine products 3.1 The gearbox shall be manufactured according to the product drawings and technical documents approved by the prescribed program library. 3.2 Longitudinal and lateral tilting requirements
The gearbox shall be able to operate in positive belt under the conditions of horizontal static 15°, dynamic 22.5° and longitudinal static 5°, dynamic 7.5°. 3.3 Tightness
The tight surfaces of the gearbox and the pipe heads shall not have oil or water seepage. 3.4 Oil absorption time
The oil absorption time of the gearbox (for non-empty oiling) shall not be greater than B (with the main engine running and the pressure gauge indicating a reading and stabilizing at
3.5 Reversing time
The speed of the gearbox in any state of reversing shall be less than 50% of the specified input speed, and the reversing time shall not be greater than 15. 3. 6 Preparation coefficient
The reserve coefficient of the gear clutch should not be less than 1.5. Approved by the National Machinery Industry Association on September 17, 1999 and implemented on January 1, 2000
3.? Clutch belt torque
JB/T9746.11999
When the gearbox is running on the test bench, when the gearbox is disengaged or reversed, the clutch belt torque (such as the clutch on the output shaft, measured from the output, it can be measured from the output shaft and then converted to the clutch position) should be 1.5% of the torque of the gearbox.
3.8 Mechanically operated gearbox longitudinal force When the mechanically operated gearbox is reversing during operation, the handle operating force should not exceed 150N. 3.9 Oil temperature
The lubrication tank temperature of the gearbox should not be higher than 70°C when sliding bearings are used: it should not be higher than 80°C when rolling bearings are used (under the condition that the ambient temperature is not high!
3.10 Contact spot of transmission gear pair
The contact spot composition of the main transmission gear pair of the gearbox should not be less than the requirements of the table! Table
Transmission capacity
tw (r-rnin-)
Output height%
Tooth length%
In: If the gear has a replacement depth, the contact area should be repaired or the inspection part should be removed. 3.11 No-load power loss rate
Gearbox no-load power loss rate is in accordance with the provisions of 2: 45
Production capacity
kwtpin
Electric speed control
Operation oil pressure fluctuation channel
Silicon operation
Pressure operation
> 0.03 -0.5
0.03-0.5
Due to the .1. working oil pressure of the gear under the conditions of the test specification requirements, the fluctuation value of the working oil pressure gauge is within the range of ±口.05MP, 3.[3 gearbox retracted, the radial site movement and end face reading runout tolerance of the output coupling shall comply with the provisions of Table 3, Table 3
Elastic connection
Transmission capacity
kw?tr.min-l)
Input coupling
Light to the country
1) The value of the cumulative use of the dynamic bearing is 27 in the table. 2
Radial shaft joint
Screen elimination matching movement
0. 14 100
Internal connection!
Output coupling
Long surface mesh dynamic
Output joint
Sugar surface circular avoidance
0.0716 door
3.14 Deep sound
JBT9746.1—1999
Gearbox noise shall comply with Appendix A (Appendix to the Standard) 3. 15 Cleanliness
The cleanliness of the gearbox shall be in accordance with the provisions of Table 4
Transmission capacity
kwr(++min-)
Cleanliness
i=:e empirical coefficient, =29mg/kw
According to the transmission capacity of each pinion gear, the power calculation is carried out according to the small speed ratio and large speed. If the spring force is less than the kw/(r·mn\) of the center, the test building is calculated at 22kw. 3.16 Applicability test
Gear standard products shall be subject to applicability assessment, and the assessment method shall be in accordance with BT5112, so the classification and judgment rules shall be in accordance with the provisions of old T51127 and Appendix B (standard catalog). The assessment indicators are: 1. Mean time to first failure (MTTFF) should be less than 500h; 2. Mean time between failures (MF) should be no less than 0; 3. Comprehensive accuracy score () should be no less than 60 points. 3.1 Safety protection
The safety protection requirements of the gearbox should comply with the provisions of the product technical documents or order agreement. 3.19 Appearance
The paint on the outer surface of the gearbox should be beautiful, uniform, and consistent in color, and shall not have defects such as peeling, rubbing, and dampness. 3.19 Service life
If the transmission capacity is less than or equal to 0.03 kW/(r·mn-l), the service life of the gearbox (first maintenance period) shall not be less than 6000 h; if the transmission capacity is greater than 0.03 kW/(r·mfm), the service life of the gearbox (first maintenance period) shall not be less than 10000 h. 3.20 Warranty period
Under the conditions of correct installation, subsequent maintenance and normal use as required, the warranty period is one year from the date of purchase by the user. 4 Weakness test method
4.1 Test The preparations before gear replacement shall be carried out in accordance with the requirements of Section 4 of 11572-1989. 4.2 Idle running test
4.2.1 The oil absorption time of the gearbox oil system refers to the time when the input speed is 40%-50% of the rated speed, from the start of the input shaft operation to the oil pressure gauge pointer reading and stabilizing.
4.1.2 Quick gearbox replacement test shall be carried out in accordance with the provisions of 5.1.2 of 1572-1989. 4.3 Load test
4.3.1 The load test shall be carried out in accordance with the requirements of Tables 5 and 6. The rated value of the load is determined according to the transmission capacity of the gear ratio. 4.3.1 In the load test, the oil temperature, oil pressure, oil pressure fluctuation value, shift time, handle operating force, sealing, contact quality, abnormal sound, etc. are tested and recorded. Transmission capacity kw/fr-min-? JB/9746.1-1999
Set auxiliary speed
The above brackets are the running time of the gears mentioned above. 2This table is applicable to the performance test
Transmission capacity
kwi(r-min\)
Set input speed
Predetermined power
Partial load
Set power
Partial load
Operation time
Account car 120 damage car fast, slow down!
Room car 60
Take the car (earn fast 6, slow!
Frequency car 180 (teacher car fast 90, teacher car understand 90) to car 60
Non-double-gear pin: slow things travel light time for willing car fast gear, version slow turn back and do flat fast end the same. 2 This table 1 conditions apply to Ding out test.
4. 4 4.4.1 During the test, the gearbox input speed is 50%~60% of the rated speed, and the corresponding load is applied according to the matching diesel engine propulsion characteristic curve. The forward and reverse clutch and reversing are performed three times to determine its working performance and reversing time. The reversing time is the time from the start of the reversing sensor to the start of the output shaft. 4.4.2 Determination of the reserve coefficient a) According to the provisions of 53.2 of GB/T11572-1989, b) When subject to the test bench conditions, the working pressure under the rated working pressure is converted into the corresponding part of the test load. Oil, then reduce the clutch working oil pressure until it stops working. At this time, calculate according to formula (1): 8P
Where: 8--reserve coefficient:
-oil pressure converted to the corresponding part of the test load, MPa; .113
JE/T9746.1-1999
P-operating pressure when the clutch starts to slip, MPa4.4.3 Clutch selection test
When the gearbox oil temperature is higher than 40% and the input speed is not less than 60% of the rated speed, when the clutch is disengaged, after the brake eliminates the buried plate, measure the torque of the withdrawal shaft. Measure with a torque measuring device. 4.4.4 Gearbox reverse test is carried out according to 6.3 of G8 Jin 11572-1989. 4.5 The mechanically operated gearbox handle shift force can be measured by spring. 4.6 The contact point inspection of the main transmission gear of the gearbox shall be carried out and recorded after the test. 4.7 Under the conditions of rated speed, oil temperature 60-70°C and oil height in accordance with the regulations, the maximum no-load power loss rate of the inner wheel box shall be measured. 4.8 The noise measurement method of the gearbox shall be in accordance with B/T6404. 4.9 The gear pinion noise measurement shall be in accordance with Appendix C (Appendix of the standard). 4[0 Gearbox reliability test
Bench test time is in accordance with JD/T5112? Provisions (the actual use time of the user may be used instead of the test conditions and test contents. The test shall be carried out in accordance with the provisions of 4.1-4.6, 4.11 and 4.12. 4.11. The safety protection performance test of the inner gear pin shall be carried out in accordance with the provisions of the production technical documents. The main purpose is to examine whether its action is sensitive, accurate and safe.
4.12 The sealing and appearance quality of the gearbox shall be checked by daily measurement. 4.13 The service life of the gearbox (first overhaul period) shall be assessed during the actual ship's voyage. The user shall provide a use report: 5 Inspection rules
5.1 Factory inspection
5.1. 1 After the gearbox is assembled, the exit test shall be carried out. 5.1.2 The factory test shall be carried out in accordance with the provisions of 4.2.4.3, 4.4.1, 4.4.3, 4.5, 4.6, 4.1t, 4.12. 5.2 Type inspection
5.2.1 When the gearbox product encounters one of the following situations, a type test shall be carried out:) The trial production of new products:
b) There are major changes in the design, process, production equipment, and management of the product, which affect the product performance:) Weekly inspection;
d) The national quality supervision agency proposes to carry out this inspection. 5.2.2 The items of type inspection shall be in accordance with the provisions of Chapter 4. 5.2.3 The ordering unit has the right to inspect the received products, and the test items are optional in Chapter 3. The inspection rules shall be in accordance with the provisions of GB.T2828 and shall be agreed upon by the supply and demand parties.
6 Marking, packaging and storage
6.1 The gearbox should have a nameplate and indicator plate. The nameplate of the export product should have Chinese and English translations. The nameplate should indicate: name, model, registered trademark, main characteristic parameters (input speed range, rated transmission capacity, speed ratio, etc. 1, date of manufacture and serial number, ship inspection mark, manufacturer name.
6.2 The packaging of the gearbox should comply with the provisions of GB/T13384. 3 Under the storage conditions of explosion and wind, the manufacturer should be able to ensure that the effective sealing of the gearbox is not less than 12 months from the date of manufacture. 5
JB/T9746.1-1999
Appendix A
【Appendix to the standard】
Hidden value of gearbox noise
When the gearbox is in its normal condition, the noise limit is in accordance with Figure A1. If the user has other requirements, it can be negotiated with the manufacturer. Al
Power kw
JB/T 9746.1—1999
(Appendix to the standard)
Classification of fault modes of marine gear auxiliary equipment
R1 Classification of fault modes of marine gear registration is shown in Table B1. Table
01 Gear pin complete machine
Gear sheath
Gear box
Gear box
Gear pin
Gear box
Gear box
(2 Extraction body assembly
Active performance shaft hole
Other bearings
Comply with the body connection medium selection of the injection hole||t t||03 gear
determined supply or connection
gear wheel
meshing surface
connecting bolts with output wheel, torque pin, bolt hole (4 shaft
auxiliary shaft, transmission shaft, output shaft
torsion chain
bearing rotation thrust, small bolt
05 clutch parts
clutch housing
clutch
body
adaptive ring
platewww.bzxz.net
so lock type
stable coefficient <1.3||tt| |Oil time>89
Oil source>80°℃
Oil and water slip
Water control slip
Water-moistening coating
No reverse frequency connection
Twisted, cracked
Excessive wear
Excessive warm pull
Violation, please
Failure, excessive density
Pointing, cavity
Broken, replaced
Severe change, compression ignition
Dense damage, ancient
Step forward reading is serious, teeth cracking, shrimp
Surface pressure is severe, interference fit failure|| tt||Breaker, nuclear torsion inflammation
Situation description
Shutdown to remove
Including parts, gaskets, etc.:
With one-time technical allowance to exclude
Need to be replaced
Need to be changed
Need to be replaced
Replace
Serious and damaged
Need to be replaced
Need to be replaced
Need to be replaced faster
Noshimo
Need to be connected
Need to be replaced
Need to be replaced
Therefore, reduce the cost
Name. Name
S Other torque transmission parts
Compiler, output coupling
07 Oil image
Hangzhou wine image
Along the resource device
Oil cooler
(9 Control and measurement system
Oil distributor
Training network, resource valve
1 Others
Safety equipment
JB/T9746.1—1999
Table AI (complete)
Failure health mode
Thank water, oil
Long-term effect, no Bei
Situation description
Need to change
By the side change
Need to replace
Replacement
Note: The failure of the wheel box caused the raceway to become According to the degree of danger or the most likely degree of recovery, the faults are divided into life-threatening faults, serious faults, major faults and minor faults.
My life number!
Causes personal injury or more serious parts to change or causes major economic damage.
Refers to the faults that exceed the specified limit value of the gearbox performance, the main cost is high, and the faults need to be dismantled to eliminate. (Class:
Refers to the faults that need to be stopped for maintenance, need to be replaced, and can be eliminated by the following tools. Minor fault:
Refers to the faults that do not cause shutdown, need to replace parts, and can be eliminated in a short time by the test machine. C1 Determination of equipment, equipment and cleaning notes
CI instrument
JBrr 946.1-1999
(Standard Record)
Method for determination of gear cleanliness
Japanese) gear: including round, chain, fan-shaped nylon of different sizes: b) filter screen: SSw0.032/0.028GB/[6003.1; necessary instruments and tools.
CI.2 Equipment
a) Analytical half of 1g10000 of inductively coupled protein: h) oven;
dryer
C1.3 Washing liquid
Solvent shooting [implementation of YY-120GB 1922), drying oil and two ketone C1 impurity yield operating procedures
C2.1 After rotating, rinse with clean kerosene for about 3 minutes. C2.2 Collect the metal cleaning liquid at the oil bottom, oil filter, absorbent filter, and cooler. C2.3 Disassemble all detachable parts of the gearbox, and use kerosene to carefully clean the inner and outer surfaces of the box body and all parts, and clean the filter. Remove the filter element and the absorbent filter, and soak them in a container containing cleaning liquid. C2.4 After all the impurities are fully washed and precipitated for 20,000, take the bottom part and filter it with SSW0.032/0.028 filter. C2.5 Soak the filter containing impurities in solvent oil and acetone in turn for 20 minutes each. 2. Put the impurity-containing filter soaked in the cleaning liquid into a 105±5℃ oven for 60 minutes, take it out, put it in a dry environment for 6 minutes, and then weigh it on a 10000 g balance. Repeat the above drying, cooling and weighing process for the filter containing impurities many times until the difference between the two weights is no more than 41000. Record this mass.
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