JB/T 9278-1999 Technical requirements for gear transmission mechanism of pressure gauge JB/T9278-1999 Standard download decompression password: www.bzxz.net

1cs17.100
Standard of the Machinery Industry of the People's Republic of China
TB/T92781999
Technical Conditions of Gear Transmission Mechanism of Pressure Gauge
Gears movement specification of pressure gauge1999-08-06 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/R 82781999
This standard adopts the Japanese national standard JSB7505-198X for registered tube pressure gauges. This standard is a revision of ZBN11020-9K Technical Conditions of Gear Transmission Mechanism of Pressure Gauge. During the revision, the original standard was revised, and the main technical content did not change
This standard replaces ZBN11020-90 from the date of implementation. The appendix of this standard is a reminder appendix.
This standard is proposed by Xi'an Industrial Instrumentation Research Institute. The responsible drafting unit of this standard is Xi'an Industrial Instrumentation Research Institute. The main drafters of this standard are Wang Yuankang and Zhao Zhihong. Scope
Mechanical Industry Standard of the People's Republic of China
Technical conditions for gear transmission mechanism of pressure gauge
Geaxs rmomvemert appciflcadoa of presare gauge This standard specifies the technical requirements, test methods and inspection specifications of pressure gear transmission mechanism. JB/T 9278-1999
Generation 11020
This standard applies to pressure gear transmission mechanism (hereinafter referred to as movement) used in general pressure gauges and similar pressure gauges. This standard applies to movement made of metal materials. This standard does not apply to movement used in precision metal gauges. 2 Cited standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. This standard is published for, and the versions shown are valid. All standards will be revised. Customers using this standard should consider the possibility of using the latest version of the parallel standard. GB/T11841996 Determination of final tolerances for shape and position tolerances CB/T2828-1987 GB/T 2829-1987 GB/T [5464-1996 JB/T9329-1999 3 Technical requirements 3.1 Shaft and gear rotation angles Batch inspection counting sampling procedures and sampling tables (for inspection of continuous batches) Synchronous variable counting batch sampling procedures and sampling tables (for qualitative inspection of production processes) Instrument collection and packaging equipment and accessories Transportation, transportation of instrumentation and other basic environmental conditions and test methods When the gears of the movement are in transmission, the rotation angle of the shaft should not be less than 3. When the shaft gear rotates 36D, the number of unengaged teeth of the shape gear should not be less than . 3.2 Transmission
The gear of the movement should be smooth and flexible when it is transmitting, and there should be no jumping and stopping. 3.3 The axial clearance of the shaft gear and the fan gear parts should be within 0.1 (mm-0.25mm. 3.4 Radial clearance
The radial clearance of the shaft gear and the fan gear parts and the lower plate should be within D.01~0.155. 3.5 Flatness
The surface tolerance of the movement installation surface should not exceed B/T 3.6 When the movement is horizontally placed, the hairspring should be in a horizontal position, and the spacing between the hairspring circles should be uniform. The hairspring should be firmly connected to the support. 3.7 The radial runout tolerance of the end of the gear of the radial moving axis should not be greater than .15 mm. 3.8 The surface of the movement should be clean and free of stains, obvious burrs or defects. 3.9 When the gear of the movement is subjected to a rotation angle of 14°*=1D° and a frequency of 5)/min, a wear test of 200,000 cycles is carried out. After the test, the transmission stability shall meet the requirements of 3.3, the axial discontinuity shall not be greater than D.27m, and the radial distance shall not be greater than 0.00mm. 3.10 Anti-transport environment period
The movement shall meet the assumptions of CB/T15464 under the transportation packaging strip. Among them, the high, low exhaustion and mature test items can be exempted, and the self-falling height is 250m. After the test, it shall meet the requirements of 3.6 and 3.7. 4 Test method
4.1 Shaft gear rotation angle inspection
When the gear of the core is meshing transmission, after ensuring the transmission of the gear or 360, check the number of teeth on the sector gear that are meshing. 4.2 Transmission semi-stability test
Connect the core with its matching spring (Appendix A for testing), install the corresponding pointer, and simulate the work of the positive force gauge. Slowly increase the load to the limit of the measurement, and then reduce the load to the lower limit of the measurement. The time of each increase or decrease should not be less than 30. It must be carried out twice to observe whether the pointer has jumping or stagnation.
4.3 Axial space inspection
Inspect the white gauge.
4.4 Free from the source of the standard
Place the movement horizontally on the special equipment, and install a 5-diaphragm indicator on both sides of the movement respectively. The measuring rod drawing lines of the dial indicator should coincide with each other, and be perpendicular and intersecting with the axis center line of the measured gear shaft (or fan gear shaft). The measuring point is on the side shaft close to the inner side of the plate.
During the test, the measuring head of the middle dial indicator is pre-adjusted 3mm-4 on one side of the shaft, and the pointer of the dial indicator is adjusted to a certain reverse line of the effective number on the mark as the reference point. Repeat 2 to 3 times, and then gently place the measuring head of the B dial indicator on the other side of the shaft to ensure that the reference point of the A dial indicator does not change. Then adjust the pointer of the dial indicator to a certain scale line marked with numbers as the reference point, and repeat 3 steps 3 times to make the indicated value <1> ...
4.9 Resistance test
Install the movement on the special test equipment: assemble the corresponding pointer, and conduct the test according to the provisions of 3.9. After the test, conduct the inspection according to the provisions of 4.2-4.4.
4.10 Transportation and environmental resistance test
Conduct the test according to the requirements specified in B/T9325 and 3.1U of this standard. After the test, conduct the inspection according to 4.6 and 4.7 of this standard. 5 Inspection rules
5.1 Factory inspection
5.1.1 Inspection items
) Transmission runnability;
e) Diameter clearance;
{) Flatness+
e) Warp runout;
) Appearance,
5.1.2 Sampling and grouping rules
JA/T9278—1999
According to the provisions of GB/T2828, the number of unqualified products per unit product is selected, and the qualified quality level AOL is determined by the manufacturer or the user. The standard is deduced: qualified quality level A0L=0.65, general inspection water level=1, one sampling is the case. 5.2 Type inspection
When any of the following conditions occurs, a) the trial production appraisal of new trial production movements and old movement conversion production; when there are major changes in design process and materials during normal production, which may affect product performance; b) during normal production, after a period of production and multiplication of production, a type inspection should be carried out: d) after a long period of production, when the factory inspection results are significantly different from the last type inspection: A)
When the national quality supervision agency has proposed the requirement for type inspection.
5.2.1 Inspection items
According to the technical requirements of the enterprise department in the technical standards.
5.2.2 Oiliness and composition rules
According to the provisions of GBT282V, the number of unqualified products per 100 units of products is selected, and the ROL is determined by the manufacturer and relevant departments.
This standard is recommended: small ROL = 20, dosage level I, = [one-time sampling plan. The inspection cycle is half a year or one year.
6 Marking, packaging and purchase and storage
6.1. Packaging of the movement (the packaging should have: a) manufacturer name or trademark: 1) product name: 2) model and main parameters; 3) number: year of manufacture or batch number. 4.2 Packaging The packaging of the movement should comply with the provisions of GB/T 15464, and the protection type shall be selected by the manufacturer. 5.3 Storage The movement should be stored in a dry and ventilated environment. The air inside should not be corrosive. 3. 9278—1999
Appendix Abzxz.net
(Suggested Appendix)
Matching spring tube
Select the matching spring tube according to the number of gear teeth: a) When the number of gear teeth is 10~12, select a 10MPa spring tube; b) When the number of gear teeth is 14~15, select a 0.6MPa spring tube; c) When the number of gear teeth is 16, select a 0.16MPa spring tube.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.