This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of the three-phase parallel connecting rod pulsating continuously variable transmission. JB/T 6951-1993 Three-phase parallel connecting rod pulsating continuously variable transmission JB/T6951-1993 Standard download and decompression password: www.bzxz.net

J19 | | tt | | JB | -13 Released
Ministry of Machinery Industry of the People's Republic of China
Released
Implemented on 1994-07-01
Machinery Industry Standard of the People's Republic of China
Three-phase Parallel Connecting rod pulsating continuously variable transmission
Theme content and scope of application
JB/T 6951—93
This standard specifies the type and basic parameters of the three-phase parallel connecting rod pulsating continuously variable transmission , technical requirements, test methods, inspection rules and markings, packaging, transportation and storage.
This standard applies to mechanical continuously variable transmissions (hereinafter referred to as 0.75~5.5kW) consisting of three groups arranged in parallel, a connecting rod reciprocating swing mechanism with a 120° phase difference in the original moving parts, and a one-way super clutch. transmission). This standard does not apply to transmissions with other transmission devices attached to the box. The working environment temperature of the transmission is -20~1040℃. When the ambient temperature is below 0°C, the lubricating oil must be preheated before starting. 2 Reference standards
GB191
GB6404
Packaging, storage and transportation pictorial mark
Determination method of noise and sound power level of gear device GB11368
Cleaning of gear transmission Degree
GB/T13306 labelwww.bzxz.net
GB/T 13384
ZBY110
ZBY111
General technical conditions for mechanical and electrical product packaging
Torque and speed measurement Instrument
Torque speed sensor
Type and basic parameters
3
3.1 Model writing method
The transmission model includes: product code, motor power, Output shaft rotation direction code and assembly type code. 3.1.1. Product code
The transmission code is represented by the combined letters \U34. 3.1.2 Assembly type code
There are eight assembly types of transmission (see Figure 1). The code names are expressed in Roman numerals, approved by the Ministry of Machinery Industry on 1993-07-13
, and
implemented on 1994-07-01
1
JB/T695193|| tt | " means counterclockwise rotation. 3.2 Marking example
Three-phase parallel connecting rod pulsating continuously variable transmission, equipped with a motor power of 1.5kW, the output shaft rotates clockwise, the assembly type is type I, and its marking is:
U34
3.3 Basic parameters
1.5
3.3.1 Main performance parameters
S
JB/T6951
Assembly type code
Pinch-out shaft rotation direction code
Motor power
-Product code
The main performance parameters of the transmission should comply with the provisions of Table 1||. tt||Machine
Type
U34-0.75
U34-1.5
U34-3
U34-5.5
Input power| |tt||kw
0.75
1.5
3
5.5
3.3.2 Outline and installation size parameters
Input speed| |tt||r/min
1390
1400
1420
960
Main performance parameters
Maximum output torque|| tt||N·m
53
108
215
394
Model
Maximum output power
kw
0.56
1.13
2.25
4.13
The appearance and installation size parameters of transmission 1~N type should comply with Figure 2 and Table 2 Regulations. The shape and installation size parameters of the transmission V~ should comply with the regulations in Figure 3 and Table 3. 2
Output speed range chart
r/min
0~150| |tt||0~200
JB/T6951-93
0
3
5
0
'91|| tt||2
positive
W-9
Z-
OIW
brush
e4
Picture| |tt||N~
0
i
Table
2
0
0
8|| tt||0
tt
s-en
s't-en
type
IB/T6951
4|| tt||6
6*91
2
8
0
W-9
ziw-
OIW-
95
7
Pta
Table
00
008
081
264
Oe
12
2
ss-en
S-EN
S't-En
sio -en
4 Technical requirements
4.1
Basic requirements
JB/T6951-93
manufacture. 4.1.1
4.1.2 The material, visibility, working surface thickness, and dimensional accuracy of the main parts of the transmission should meet the requirements of relevant standards and design drawings. 4.2 Overall machine performance requirements
4.2.1
4.2. 2
4. 2. 3
4. 2. 4
Speed ??regulation of transmission The action of the mechanism should be sensitive and it should be stable when operating within the output speed range. When the transmission is running without load, the output speed range should comply with the provisions of Table 1. When the transmission is running without load, adjust it to the highest speed and start it 5 times within 2 minutes. No faults should occur. The transmission shall not make any abnormal noise during operation, and its operating noise shall not exceed the values ??specified in Table 4. Table 4 Noise
Machine
Type
Noise sound power level||tt ||4. 2. 5
U34-0.75
73
U34-1.5
U34-3
75
dB( A)
U34-5.5
When the transmission is running, the temperature rise of the oil pool shall not exceed the value specified in Table 5, and the maximum temperature of the oil pool shall not exceed 85°C. Table 5 Oil pool temperature rise
Machine
Type
No-load operation temperature rise
Negative operation rise
4. 2. 6||tt ||U34-0.75
30
35
U34-1.5
When the transmission is running under load, its slip ratio shall not exceed the value specified in Table 6. Table 6 Clearance rate
Nominal output t/min
Slip rate
4.2.7
20
35
The transmission efficiency of the transmission shall not be lower than the value specified in Table 7. Table 7 Efficiency
Nominal output speed r/min
Efficiency
4.2. 8
4.2.9
华
20|| tt||40
The cleanliness of the transmission shall not be greater than the value specified in Table 8. Table 8 Cleanliness
Machine
Type
Impurity content
U34-0.75
U34-1.5
100
15
100
132.00
The radial circular runout in the middle part of the transmission shaft extension should not be greater than the value specified in Table 9. Table 9 Shaft extension radial runout
Shaft extension diameter
Radial runout
>18~30
0.04
U34-3
U34-3
75
35
45
U34-5.5
150
10
150
℃
%
mg/L
U34-5.5
mm
>30~50
0, 05
5
JB/T 695193
4.2.10 The parallelism of the transmission axis to the foot support surface shall not be less than Grade 9. 4. 2. 11
There shall be no oil leakage at the matching and sealing points of the transmission. 4.3 Appearance quality requirements
4.3.1 The non-processed outer surface of the transmission should not have defects such as bulges, depressions and pores. 4.3.2
The paint on the outer surface of the transmission should be bright, flat, firm, and consistent in color. There should be no defects such as paint leakage, bubbles, peeling, etc. 5 Test method
5.1 Test conditions
5.1.1 The transmission test should be carried out on a special test bench. 5.1.2 During the transmission test, the indoor ambient temperature should be within the range of 5 to 40°C, and the air around the transmission should circulate freely. Forced circulation is not allowed.
5.2 Test device and test equipment
5.2.1 The test device consists of a prime mover (AC motor), a transmission under test, a sensor, a loader, a coupling and a test platform, as shown in Figure 4.
Figure 4 Schematic diagram of test device
1-test platform 12-prime mover: 3, 5-torque and speed sensors, 4-radiator transmission, 6-adder, 7, 8, 9, 10-coupler 5. 2. 2
All test instruments should be within the validity period of calibration, and their accuracy should comply with the requirements of Table 10. Table 10 Test instruments and accuracy
Test instruments
Torque and speed measuring instrument
Torque and speed sensor
Thermometer
Analytical balance
Noise measurement only
Accuracy
Requirement
Grade 1
Grade 1
±1c
Requirement
Sensitivity (1/10000) g
± 1 dB(A)
5.2.3 The coaxiality requirement after the test device is installed shall meet the accuracy requirements specified in ZBY111. 5.3 Test methods and procedures
5.3.1 Test preparation
After the transmission, test equipment and sensors are installed as required, the measuring instruments shall be placed in a position convenient for observation, and connected, self-calibrated, and zeroed before testing.
When the transmission output speed is 20, 100, and 150 r/min, run at no load for 20 minutes respectively. After running continuously for 1 hour, the following 6 tests are carried out.
5.3.2 No-load running test
JB/T 695193
5.3.2.1When the transmission is running at no load, turn the speed regulating hand wheel to test the output speed range. When the nominal output speed is 20, 100, and 150 r/min respectively, 10 sets of input speed and output speed data are measured. The data collection and processing methods are shown in Appendix A (Supplement).
5.3.2.2When the transmission output speed is 100 r/min, the noise test is carried out in accordance with GB6404. 5.3.3 Load-cut operation test
When the nominal output speed is between 20 and 100 r/min, select the maximum output torque as the rated load value according to Table 1: When the nominal output speed is greater than 100 r/min, the output torque T is calculated by formula (1). 7, = 9549
n
Where: T,
output torque, N·m:
P,
maximum output power, kW, its value is obtained according to Table 1; output speed, r/min.
-(1)
5.3.3.1 The load operation test is carried out in four stages: 25%, 50%, 75% and 100% of the rated load of the output shaft. The first three stages are operated at an output speed below 100r/min. The operation time of each stage is not less than 15min. In the 100% rated load stage, the operation time is based on the stability of the lubricating oil temperature. 5.3.3.2 In the 100% rated load stage, when the nominal output speed is 20, 100 and 150r/min respectively, 10 sets of input speed, torque and output speed, torque data are measured. See Appendix A for data collection and processing methods. 5.3.3.3 The transmission slip ratio is calculated according to formula (2). =
Wherein: - transmission slip rate, %
o
Te
0X100
\z - average output speed when loaded at the same speed regulating position, t/min: 2 - output speed of the transmission without slip, r/min; neai nin
n
元 - average input speed when loaded at the same speed regulating position.1/min; - average output speed when unloaded at a speed regulating position, r/min: \.. - average input speed when unloaded at the same speed regulating position, r/min, 5.3.3.4 The transmission efficiency test is calculated according to formula (3). In the formula: - Transmission efficiency, %:
Tu-
Ta-
n\
2T,nu
X 100
ETun
Each measured value of input torque at the same speed regulating position, N·m; Each measured value of output torque at the same speed regulating position, N·m; Each measured value of input speed at the same speed regulating position, r/min; N--The number of effective measurements of torque and speed at the same speed regulating position. 5.3.4 Temperature rise test
The temperature rise test of the transmission is divided into no-load operation temperature rise test and load operation temperature rise test. 5.3.4.1 Determination of oil pool temperature during no-load operation
(2)
(3)
After the transmission output shaft has been running at maximum speed for 30 minutes without load, use a thermometer to measure the oil pool temperature every 15 minutes until the temperature stabilizes.
7
JB/T6951—93
Temperature stability means that when the transmission is running, the temperature of the lubricating oil does not change by more than 1°C within 30 minutes. 5.3.4.2 Determination of oil pool temperature during load operation
When the transmission nominal output speed is 100r/min, after running at rated load for 30 minutes, use a thermometer to measure the oil pool temperature every 15 minutes until the temperature stabilizes.
5.3.4.3 Determination of ambient temperature
a. Place an expansion ball thermometer 1.5m away from the surface of the transmission to be tested, with the expansion ball of the thermometer at the same height from the ground as the axis of the transmission:
b. The placement of the thermometer should not be affected by external radiant heat and airflow; e. The reading of the ambient temperature value should be carried out simultaneously with the reading of the transmission oil pool temperature value. 5.3.4.4 The temperature rise of the transmission is calculated according to formula (4): -tt
Where: t-temperature rise at no load or rated load, C: t-
-oil temperature at no load or rated load, C: t. ———ambient temperature at no load or rated load, C. 5.3.5 Overload test
(4)
5.3.5.1 After the load test, the transmission is subjected to overload test at the nominal output speed of 100r/min and at 110% and 120% of the rated load in turn. The test time for each loading stage shall not be less than 2min. 5.3.5.2 The overload test is carried out under the condition that the lubricating oil temperature is stable. 5.3.5.3 After the overload test, the transmission shall not have any abnormal phenomenon. 5.3.6 Oil leakage inspection
When the transmission is running under load, it is observed by visual inspection. If there is more than one drop every 120 minutes at the fixed connection part and more than one drop every 60 minutes at the movable connection part, it is considered to be leaking oil.
5.3.7 The cleanliness determination of the transmission shall be carried out in accordance with GB11368. 6 Inspection rules
6.1 Products must be inspected and qualified by the quality inspection department of the manufacturer before they can leave the factory, and they shall be accompanied by product certificates and product instructions. 6.2 The inspection of the transmission is divided into factory inspection and type inspection. 6.3 Factory inspection
6.3.1 The performance of the transmission speed regulating mechanism shall comply with the provisions of Article 4.2.1. 6.3.2 The output speed range of the transmission shall comply with the provisions of Article 4.2.2. The no-load running starting performance shall comply with the provisions of Article 4.2.3. 6.3.3
The no-load running oil pool temperature rise test shall comply with the provisions of Article 4.2.5. 6.3.4
6.3.5
The radial circular runout of the outermost end of the transmission shaft extension shall comply with the provisions of Article 4.2.9. 6.3.6 The parallelism of the transmission axis line to the foot supporting surface shall comply with the provisions of Article 42.10. 6.3.7
6.3.8
The transmission sealing inspection shall comply with the provisions of Article 4.2.11. The appearance quality of the transmission shall comply with the provisions of Article 4.3. 6.4 Type inspection
6.4.1
a.
b.
c
d.
e.
f.
8
Those who fall into any of the following situations should undergo type inspection. Products produced for the first time after identification and finalization or old products produced by factory transfers: When normally produced products have major changes in design, process or materials, etc., which may affect the performance of the product, regular inspections are carried out; When infrequently produced products are produced again: When the factory inspection results are significantly different from the last type inspection: When the national quality supervision agency proposes a request for type inspection.
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