This standard specifies the type and size of JO type and skeleton type vacuum rubber seals. This standard is applicable to the seals of rotary vacuum mechanical equipment with atmospheric pressure outside and vacuum chamber pressure higher than 1×10-4, at the specified temperature and with a rotational linear speed lower than 2m/s and a rotation speed lower than 2000min-1. JB/T 1091-1991 JO type and skeleton type vacuum rubber seals JB/T1091-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JO type and skeleton type vacuum
Rubber sealing ring type and size
Subject content and scope of application
This standard specifies the type and size of JO type and skeleton type vacuum rubber sealing ring. JB1091--91
This standard is applicable to the seal of rotary vacuum mechanical equipment with atmospheric pressure outside and vacuum chamber pressure higher than 1×10-\Pa, at the specified temperature and the rotation line speed is lower than 2m/s, and the rotation speed is lower than 2000min\1Reference standard
HG4-692 Skeleton rubber oil seal
.YB248
Carbon rope elastic lean steel wire
3J0 type vacuum rubber seal Figure type and size 3.1 The type and series size of JO type vacuum rubber sealing ring shall comply with the provisions of Figure 1 and Table 1. 4
Approved by the Ministry of Machinery and Electronics Industry on January 1, 1991 and implemented on July 1, 1991
JB1091-91
JB1091—91
3.2 Marking example
J0 type vacuum rubber seal has a nominal diameter of d=50mm, marked as: JO type seal.d50JB1091
3.3 Technical requirements for JO type vacuum rubber seal 3.3.1 The working medium is mechanical pump oil, diffusion pump oil or vacuum grease. 3.3.2 The working temperature is 25 to 1080℃.
3.3.3 When working under the condition of protective gas filling, the protective gas pressure shall not exceed 5×10*Pa. 3.3.4 The physical and mechanical properties of the rubber material shall ensure that the vacuum chamber pressure is not higher than 1×10-4Pa. 3.3.5JO type vacuum rubber sealing ring working surface is not allowed to have bubbles, impurities and concave and convex defects, and the appearance quality of its non-working surface shall comply with the provisions of Table 2.
Seam dislocation
Nominal diameter is less than 50mm
Non-working surface, bubble diameter is not more than 1mm, no more than 2
Non-working surface, impurity area is not more than 1mm, no more than 2
Non-working surface, concave and convex is not more than 0.5mm, area is not more than 2mm*, no more than 2
Burr height and shear depth shall not exceed 0.3mm allowed, but shall not exceed the tolerance range
Nominal diameter 50~200mm
For non-working surfaces, the bubble diameter is not more than 2mm, and there shall be no more than 2 places
For non-working surfaces, the impurity area is not more than 2mm2, and there shall be no more than 2 places
For non-working surfaces, the bump is not more than 0.5, and the area is not more than 6mm2, and there shall be no more than 2 places
The burr height and shear damage depth shall not exceed 0.3mm. It is allowed to exist, but shall not exceed 0.5mm
Note: In order to make the sealing ring surface smooth, the surface roughness R of the mold is required to be 0.20m or hard chrome plated and polished. 3.3.6 For accessories and installation structure types, please refer to Appendix A (reference). 4 Skeleton type vacuum rubber seal drawing type and size 4.1 The type and series size of skeleton type vacuum rubber seal shall comply with the provisions of Figure 2 and Table 3. D
(equivalent to nominal diameter)
JB1091—91
Outer diameter tolerance shall comply with the provisions of Table 4, height tolerance shall comply with the provisions of Table 5, 4.2
4.3 Marking example
The skeleton type vacuum rubber seal ring with code PD, d=22mm, D=40mm, H=10mm is marked as: skeleton type seal ring PD22×40×10JB1091 manufacturing technical requirements shall comply with the provisions of HG4—692. 4.41
Assembly as shown in Figure 3.
Outer diameter D
Limit tolerance
3B 109191
Outer diameter tolerance
Table 5 Height tolerance
Vent holeWww.bzxZ.net
Oil filling hole
80~120
120~180
Note: The surface roughness of the inner surface of the vacuum chamber, the sealing surface R. value is 1.6um, the shaft surface roughness R. value is 0.8ummm
180~240
JB1091—91
Appendix A
JO type sealing ring and installation structure type
(reference part)
A1JO type sealing ring locking pin type and series size are shown in Table A1 and Figure A1. Table A1
Nominal diameter
Number of circles
Expanded length
Free length
Note: The material and heat treatment conditions of the spring shall comply with the provisions of YB248. 12
Conical length
Outer diameter of the spring
Outer part of the insert
Wire diameter
JB1091-91
Joint
(Screw the cone end of the spring into the spring) The type and series dimensions of the A2JO type sealing ring and sealing sleeve are shown in Figure A2 and Table A2. d(d)
Figure·A2
Nominal diameter
Nominal diameter
Note: ① The limit tolerances of 4, ds, H, and & in the table shall be implemented according to the unnoted tolerances. ②The material of the compression sleeve is A3 or H62.
0. 5×45°
JB1091—91
A3JO type seal installation example and seal groove requirements are recommended as shown in Figure A3. Figure A3
Note: ①If a bursting nut is used for compression, a metal gasket should be installed between the nut and the rubber seal. ②Surface roughness of the inner surface of each part of the vacuum chamber: the value of the sealing surface R is 1.6um, the value of the other surface R is 3.2um, and the value of the surface roughness R of the shaft is 0.8m.
Additional instructions:
This standard is proposed and managed by the National Vacuum Technology Standardization Technical Committee. This standard is drafted by the Shenyang Vacuum Technology Research Institute. The main drafter of this standard is Zhang.
From the date of implementation of this standard, the original JB1091-83 "JO type skeleton type vacuum rubber seal type and size" will be invalid. 14
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