JB/T 6761-1993 General technical requirements for pulse tachometer generators
Some standard content:
Mechanical Industry Standard of the People's Republic of China
General Technical Conditions for Pulse Tachometer Generators
1 Subject Content and Scope of Application
JB/T6761-93
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of pulse tachometer generators (hereinafter referred to as tachometers).
This standard should be used together with the special technical conditions for tachometers. The specific technical indicators and special requirements of various types of tachometers shall be specified in the special technical conditions.
Reference standards
GB2900.26
GB5872
GB7345
GB-7346
GB10405
3 Product classification
Electrical terminology Control micro motor
Technical conditions for control micro motor packaging
Basic technical conditions for control micro motorwwW.bzxz.Net
Basic appearance and structure of control micro motor
Model naming method of control micro motor
3.1 Main varieties and specifications
The varieties and specifications of the tachometer are shown in Appendix A (reference). 3.2 Model
The model of the tachometer consists of the frame number, product name code, performance parameter code and derived code. 1
3.2.1 Frame number
The frame number shall be in accordance with the provisions of GB7346.
3.2.2 Product Name Code
Derived Code
Performance Parameter Code
· Product Name Code
Machine Frame
Product Name Code is represented by capital Chinese Pinyin letters CYM and CYMD. Its meaning is: C represents tachometer, Y represents permanent magnet type, M represents pulse type, and D represents with shaping frequency multiplication circuit. 3.2.3. Product Performance Parameter Code
Product performance parameter code is represented by the number of output pulses per revolution. 3.2.4 Derived Code
Performance and structure derived codes are represented by capital Chinese Pinyin letters A, B, and C. 3.2.5 Model Example
Approved by the Ministry of Machinery Industry on August 21, 1993
Implemented on October 1, 1993
JB/T6761-93
90CYM300A indicates the first derivative product of the CYM series permanent magnet pulse tachometer with a base outer diameter of 90 mm and an output pulse number of 300 per revolution.
3.3 Appearance and Installation Dimensions
3.3.1 Appearance and Installation Dimensions
The basic appearance and installation dimensions of the tachometer shall comply with the K3 and K4 types specified in GB7346, and the body length L shall be specified by special technical conditions.
3.3.2 Shaft extension type
The basic shaft extension type for frame sizes 45 and below is a plain shaft extension, and the frame sizes 55 to 130 are semicircular keyway shaft extensions. Their dimensions shall comply with the provisions of GB7346.
4 Technical requirements
Environmental conditions for use
The environmental conditions for use of the tachometer shall comply with the provisions of Class 1 or Class 2 in Table 1 of 1.1 of GB7345. 4.2 Lead-out wires or terminals
4.2.1 Lead-out method
The lead-out method of the tachometer can be lead-out wires, terminal blocks or aviation sockets. The length of the lead-out wires is specified by special technical conditions. 4.2.2 Marking
Lead-out wires are marked with different colors as specified in Tables 1 and 2. Terminal block markings are indicated by Arabic numerals as specified in Table 1. Aviation socket markings are indicated by Arabic numerals as specified in Table 2. Table 1
Terminal board marking
Lead wire color
Lead wire color
Aviation socket marking
Output winding
4.2.3 Strength of lead wire and terminal
Marking signal
Power line
Public ground line
The strength of lead wire and terminal shall comply with 3.9 of GB7345 or the provisions of special technical conditions. 4.3 Appearance and assembly quality
4.3.1 Appearance
The appearance of the tachometer shall comply with 3.2.1 of GB7345. 4.3.2 Appearance and installation dimensions
The appearance and installation dimensions of the tachometer shall comply with GB7346 and the provisions of special technical conditions. 4.3.3 Radial clearance
The radial clearance of the tachometer shall comply with the provisions of special technical conditions. 4.3.4 Axial clearance
The axial clearance of the tachometer shall comply with the provisions of the special technical conditions. 4.3.5 Shaft radial runout
Output
Control line
JB/T6761-93
The shaft radial runout of the tachometer shall comply with the provisions of the special technical conditions. 4.3.6 Coaxiality of the mounting mating surface
The coaxiality of the mounting mating surface of the tachometer shall comply with the provisions of K3 and K4 types in GB7346. 4.3.7 Verticality of the mounting mating end face
The verticality of the mounting mating end face of the tachometer shall comply with the provisions of K3 and K4 types in GB7346. 4.4 DC resistance
The DC resistance and deviation of the tachometer winding shall comply with the provisions of the special technical conditions. 4.5 Insulation Dielectric Strength
The tachometer shall be able to withstand the test voltage specified in Table 3, and there shall be no signs of insulation breakdown or internal arcing, and the leakage current peak shall not exceed 3mA. The insulation resistance shall be measured immediately after the test and shall comply with the provisions of 4.6. Table 3
Maximum output voltage
Note: Only for the tachometer body.
Test voltage of winding to housing
(effective value)
500-°s
When the insulation dielectric strength test is repeated, the test voltage is 80% of the value specified in Table 3. 4.6 Insulation Resistance
The insulation resistance of the conductive part of the tachometer to the housing shall meet the following requirements V
Under the positive belt test climate conditions, it shall not be less than 100mA; under the extreme low temperature conditions specified in the special technical conditions, it shall not be less than 50mA; under the extreme high temperature conditions specified in the special technical conditions, it shall not be less than 10mA; after the constant damp heat test, it shall not be less than 2mA. 4.7 Output slope
The output voltage (expressed as voltage per r/min) generated by the tachometer under specified load conditions per unit speed shall comply with the provisions of the special technical conditions.
4.8 Maximum operating speed
The maximum operating speed of the tachometer shall comply with the provisions of the special technical conditions. 4.9 Minimum load impedance
The minimum load impedance of the tachometer at the maximum operating speed shall comply with the provisions of the special technical conditions. 4.10 Output impedance
The output impedance of the tachometer at the maximum operating speed shall comply with the provisions of the special technical conditions. 4.11 Number of pulses
The number of output pulses per revolution of the tachometer is calculated according to the following formula, and its value shall comply with the provisions of the special technical conditions: 60·f
Wherein, P—number of pulses;
f—frequency of the output signal of the tachometer when the speed is n, Hz; n—speed, r/min.
4.12 Pulse cycle error
The ratio of the difference between the maximum and minimum values of the pulse cycle time of the tachometer at any speed within the speed range to the average value of the cycle time at this speed is the pulse cycle error, which shall comply with the provisions of the special technical conditions. 4.13 Speed range
The speed range between the lowest speed and the highest speed at which the tachometer can work normally. 110
4.14 Weight
The weight of the tachometer shall comply with the provisions of the special technical conditions. 4.15 Low temperature
JB/T6761-93
The tachometer shall be able to withstand the extreme low temperature test specified in the special technical conditions. After the test, the insulation resistance and output slope shall comply with the provisions of 4.6 and 4.7.
4.16 High temperature
The tachometer shall be able to withstand the extreme high temperature test specified in the special technical conditions. After the test, the insulation resistance and output slope shall comply with the provisions of 4.6 and 4.7.
4.17 Vibration
The tachometer shall be able to withstand the vibration test specified in 3.18.1 of GB7345 and the special technical conditions. Unless otherwise specified in the special technical conditions, the tachometer shall not be running during the test. After the test, the tachometer shall not have loose parts or damaged rings. Check that the output slope, number of pulses, and pulse cycle errors of the tachometer meet the requirements of 4.7, 4.11, and 4.12. 4.18 Impact
The tachometer shall be able to withstand the impact test specified in 3.19.1 of GB7345 and the special technical conditions. Unless otherwise specified in the special technical conditions, the tachometer shall not be running during the test. After the test, the tachometer shall not have loose parts or damaged rings. Check that the output slope, number of pulses, and pulse cycle errors of the tachometer meet the requirements of 4.7, 4.11, and 4.12. 4.19 The damp heat
tachometer should be able to withstand the constant damp heat test specified in 3.21.1 of GB7345 and the special technical conditions. After the test, the insulation resistance measured in the box should meet the requirements of 4.6. The tachometer should have no obvious surface quality changes and no rust that affects normal operation. Check that the tachometer pulse number and pulse period error should comply with the provisions of 4.11 and 4.12. 4.20 Lifespan
The tachometer should be able to operate normally for 2000 hours at the minimum load impedance specified in 4.9 and half the maximum operating speed specified in 4.8. After the life test, check that the output slope, pulse number, and pulse period error should comply with the provisions of 4.7, 4.11, and 4.12. 5 Test methods
5.1 Test conditions
5.1.1 Climate conditions
5.1.1.1 Normal climate conditions
Normal climate conditions shall comply with the provisions of 3.1.1.1 of GB7345. 5.1.1.2 Arbitration climate conditions
Arbitration climate conditions shall comply with the provisions of 3.1.1.2 of GB7345. 5.1.1.3 Reference climatic conditions
Reference climatic conditions shall be in accordance with 3.1.1.3 of GB7345. 5.1.2 Test instruments and equipment
When measuring the output slope, pulse number and pulse period error, the speed accuracy of the tachometer steady-speed drive device shall not be less than 0.05%, and the accuracy of the digital voltmeter and digital rate meter shall not be less than 0.1% or in accordance with the special technical conditions. 5.1.3 Stable temperature
5.1.3.1 Stable temperature without power
Stable temperature without power shall be in accordance with 3.1.5.1 of GB7345 5.1.3.2 Stable working temperature with power
Stable working temperature with power shall be in accordance with 3.1.5.2 of GB7345. 5.1.4 Unless otherwise specified, the tachometer shall be installed horizontally on the standard test stand. The standard test stand shall be in accordance with Figures 1 to 3 of GB7345.
5.2 Lead wire or terminal
JB/T676193
The lead wire method and lead wire color or terminal marking of the tachometer shall comply with the provisions of 4.2.1 and 4.2.2. The strength inspection of the lead wire or terminal of the tachometer shall be carried out according to the method in 3.9 of GB7345 and shall comply with the provisions of 4.2.3. 5.3 Appearance and assembly quality
5.3.1 Appearance
Visually inspect the appearance of the tachometer and it shall comply with the provisions of 4.3.1. 5.3.2 Appearance and installation dimensions
Use a vernier caliper or micrometer to inspect the appearance and installation dimensions of the tachometer and they shall comply with the provisions of 4.3.2. 5.3.3 Radial clearance
Check the radial discontinuity of the tachometer according to method 3,2.2 of GB7345, which shall comply with the provisions of 4.3:3: 5.3.4 Axial clearance
Check the axial clearance of the tachometer according to method 3.2.3 of GB7345, which shall comply with the provisions of 4.3.4. 5.3.5 Shaft extension radial runout
Check the radial runout of the shaft extension of the tachometer according to method 3.2.4 of GB7345, which shall comply with the provisions of 4.3.5. 5.3.6 Coaxiality of the mounting mating surface
Check the coaxiality of the mounting mating surface according to method 3.2.5 of GB7345, which shall comply with the provisions of 4.3.6. 5.3.7 Verticality of the mounting mating end face
Check the verticality of the mounting mating end face according to method 3.2.5 of GB7345, which shall comply with the provisions of 4.3.7. 5.4 DC resistance
After the tachometer reaches the unpowered stable temperature, use a bridge to measure the DC resistance of each winding, and the converted value shall comply with the provisions of 4.4. 5.5 Insulation dielectric strength
The test shall be carried out according to the method specified in 3.7 of GB7345, and shall comply with the provisions of 4.5. 5.6 Insulation resistance
The test shall be carried out according to the method specified in 3.8 of GB7345, and shall comply with the provisions of 4.6. 5.7 Output slope
The tachometer is installed on a standard test bracket coaxial with the steady speed drive device. Drive the tachometer to 100r/min, and under the specified load, use a digital voltmeter to measure the output voltage of the clockwise and counterclockwise directions. The output slope calculated according to the following formula shall comply with the provisions of 4.7. U.+U
Where: K—output slope, V/r·min-\,2·100
U.—voltage measured when rotating clockwise, V; UL—voltage measured when rotating counterclockwise, V. 5.8 Output impedance
When the tachometer is not running, a voltage U, with an amplitude and frequency equal to the output voltage amplitude and frequency at the highest operating speed is applied to its output winding, and the current I in the output circuit is measured. The output impedance is calculated by the following formula, and its value should comply with the provisions of 4.10. Z,
Where: Z—output impedance, a,
U—voltage applied to the output winding, V;
I—current in the output circuit, A.
5.9 Number of pulses
The tachometer is installed on a standard test bracket coaxial with the steady-speed drive device. Drive the tachometer to 100r/min, use a digital frequency meter to measure the output voltage frequency of any direction, and calculate the number of pulses per revolution according to formula (1), which should comply with the provisions of 4.11. 5.10 Pulse period error
JB/T6761-93
The tachometer is installed on a standard test bracket coaxial with the steady-speed drive device. Drive the tachometer to 100r/min clockwise rotation, use a digital frequency meter to measure the maximum pulse period time T and the minimum pulse period time T within 10s, and calculate the pulse period error according to the following formula, which should comply with the provisions of 4.12.
Where: △T—pulse period error, %; AT
T. Average pulse cycle time within 10s, ms; T+T
5.11 Weight
Use a scale with a sensitivity of 1% to weigh the tachometer, which shall comply with the provisions of 4.14 (4)
5.12 Low temperature
The tachometer is installed on a standard test bracket and placed in a test box without power. The box temperature gradually drops to the extreme low temperature specified in the special technical conditions, with a temperature difference of ±2°C. The tachometer reaches the unpowered stable temperature under this condition, and then the insulation resistance and output slope are checked. They shall comply with the provisions of 4.15. 5.13 High temperature
The tachometer is installed on a standard test bracket and placed in a test box without power. The box temperature gradually rises and remains at the extreme high temperature specified in the special technical conditions, with a temperature difference of ±2°C. The tachometer reaches the stable temperature without power on under this condition, and then drives the tachometer to the maximum operating speed specified in the special technical conditions (under the specified load conditions). After the tachometer reaches the stable operating temperature with power on, check the insulation resistance and output slope, which should comply with the provisions of 4.16.
5.14 Vibration
Perform the test in accordance with the test method 3.18 in GB7345. The tachometer is not running during the test, and the results should comply with the provisions of 4.17. 5.15 Impact
Perform the test in accordance with the test method 3.19 in GB7345. The tachometer is not running during the test, and the results should comply with the provisions of 4.18. 5.16 Damp heat
Perform the test in accordance with the test method 3.21 in GB7345. The results should comply with the provisions of 4.19. 5.17 Lifespan
The tachometer is tested for lifespan at room temperature in accordance with the conditions specified in 4.20, and the results shall comply with the provisions of 4.20. 6 Inspection rules
6.1 Test classification
The tachometer test classification shall be in accordance with 4.1 of GB7345. 6.2 Test items and rules
The tachometer test rules shall be in accordance with 4.2, 4.3, 4.4, 4.5 and special technical conditions of GB7345, and the test items and basic sequence shall be in accordance with Table 4.
7 Quality assurance period
In accordance with Chapter 5 of GB7345. The storage period is divided into 1 year and 3 years, and the warranty period is divided into 1 year and 2.5 years, which shall be specified by special technical conditions.
8 Marking, packaging, transportation and storage
8.1 All tachometers leaving the factory shall have nameplates.
8.2 The words on the nameplate should be clear and not fall off during the use of the tachometer. The content should at least include: model and name:
b. Product number:
Manufacturer name or factory logo;
Date of manufacture.
JB/T6761-93
The packaging of the tachometer shall comply with the provisions of GB5872. The transportation and storage of the tachometer shall comply with 6.2 and 6.3 regulations. Table
Lead wire or connection
Appearance and installation dimensions
Radial spacing
Axial spacing
Shaft extension radial runout
Coaxiality of installation matching surface
Verticality of installation matching end surface
DC resistance
Insulation dielectric strength
Insulation resistance
Output slope
Output impedance
Number of pulses
Pulse period error
Technical requirements
Chapter, article
Test method
Chapter, article
Inspection test| | tt | 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
3, 4
1, 2, 3, 4
1, 2, 3, 4
Cycle test
1, 2, 3, 4
1, 2, 3,
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3,
1, 2, 3.
1, 2, 3,
1, 2, 3,
1, 2, 3,
1, 2, 3,
1, 2, 3, 4|| tt||1、2、3、4
1、2、3、4
1、2、3、4
1、2、3、4
1、2、3、4
Series harmonics of pulse tachometer generators are shown in Table A1. Serial number
Additional instructions:
JB/T676193
Appendix A
Series spectrum of pulse tachometer generators
(reference)
Outer diameter of machine base
This standard is proposed and managed by Xi'an Micro-Motor Research Institute of the Ministry of Machinery Industry. This standard is drafted by Xi'an Micro-Motor Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Tang Tianlin and Yang Jinqiang. Pulse
30, 60
50, 100, 200
150, 300, 600
300, 600, 1200
600, 1200, 2400
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