JB/T 6619.1-1999 This standard is a revision of ZB J22 005-88 "Technical Conditions for Light Mechanical Seals". During the revision, only editorial changes were made according to relevant regulations, and the technical content has not changed. This standard specifies the technical conditions for the quality of light mechanical seals, such as technology, performance, testing, acceptance, marking and packaging. This standard is applicable to light mechanical seals for small submersible electric pumps (power below 7.5kW), internal combustion engine cooling water pumps and other similar rotating machinery. Its working parameters are: the seal chamber pressure is 0~0.5MPa; the seal chamber temperature is greater than 0℃ to less than 100℃; the average linear velocity of the seal end plane is not more than 10m/s; the seal shaft diameter is not more than 40mm; the medium is clean water, oil and generally weak and corrosive liquids. This standard was first issued in June 1988. JB/T 6619.1-1999 Technical requirements for light mechanical seals JB/T6619.1-1999 Standard download decompression password: www.bzxz.net

ICS21.140
J22
JB
Mechanical Industry Standard of the People's Republic of China
JB/T6619.1-1999
Light Mechanical Seal||tt| |Technical Conditions
Specification for light mechanical seals1999-06-28 Released
National Machinery Industry Bureau
Released
Implemented on 2000-01-01
JB/T6619. 1-1999
Foreword
Ten Technical Conditions".
This standard is a revision of ZBJ22005-88 "Light Mechanical Seal. This standard will replace ZBJ22005-88 from the date of implementation. This standard is proposed and managed by the Mechanical Seal Standardization Technical Committee. The unit responsible for drafting this standard: Hefei General Machinery Research Institute. The main drafters of this standard: Lin Yuanda, Lu Kang, Ding Shimin, and Zhang Yuhong. 1 Scope
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Light Mechanical Seals
Specification for light mech anical sealsJB/T6619.1-1999
Replaces ZBJ22005—88| |tt||This standard specifies technical conditions related to the quality of light mechanical seal products, such as technology, performance, testing, acceptance, marking and packaging. This standard applies to light mechanical seals for small submersible electric pumps (power below 7.5kW), internal combustion engine cooling water pumps and other similar rotating machinery. Its working parameters are: seal chamber pressure 0~0.5MPa; seal chamber temperature greater than 0℃ to less than 100℃; average linear speed of seal end face not greater than 10m/s; seal shaft diameter not greater than 40mm; medium is water, oil and general Weakly corrosive liquid. 2 Referenced standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB/T1184—1996
JB/T 6374—1992
JB/T 6619—1993
JB/T7757.1—1995
JB/T7757.2— 1995Www.bzxZ.net
JB/T8724—1998
JB/T 8871—1999
3 Technical requirements
Shape and position tolerances, no tolerance values ??noted
Mechanical Technical conditions for silicon carbide sealing rings for seals Test methods for light mechanical seals
Cylindrical coil springs for mechanical seals
O-ring rubber rings for mechanical seals
Reaction sintered silicon nitride seals for mechanical seals Carbide seal ring roughness for ring mechanical seals 3.1 Light mechanical seals should comply with the provisions of this standard and be manufactured in accordance with product drawings and technical documents approved through prescribed procedures. 3.2 General requirements for main parts
3.2.1 Sealing ring
3.21.1 The flatness requirements of the sealing end face of the sealing ring: the hard material sealing ring should not be larger than 0.0006mm, and the soft material sealing ring should not be larger than 0.0009m.
3.21.2 The surface roughness requirements of the sealing end face of the sealing ring: the surface roughness R value of the hard material sealing ring is not greater than 0.1um; the surface roughness R value of the soft material sealing ring is not greater than 0.2um3.2.1. 3. The sealing end face of the sealing ring must not have defects such as cracks, scratches, and pores. 3.2.1.4 The parallelism between the positioning end face of the sealing ring and the auxiliary seal contact and the sealing end face shall comply with the level 7 accuracy of GB/T1184. 3.2.1.5 The verticality of the stationary ring sealing end facing the outer circle or inner hole in contact with the stationary ring auxiliary seal, and the verticality of the rotating ring sealing end facing the outer circle or inner hole in contact with the rotating ring auxiliary seal, are all in accordance with GB /T1184 level 7 accuracy. 3.2.1.6 The surface roughness R value of the part where the sealing ring contacts the auxiliary seal shall not be greater than 3.2 μm. State Machinery Industry Bureau approved 2000-01-01 implementation on 1999-06-28
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JB/T 6619.1-1999
3.2.1.7 Silicon nitride ceramic ring for sealing, oxidation Aluminum ceramic rings and silicon carbide ceramic rings are in accordance with JB/T8724, JB/T6374 and related standards respectively. The cemented carbide sealing ring used for sealing shall comply with the provisions of B8871, and the sealing rings of other materials shall comply with the relevant standards. 3.22 The size, accuracy and working load of the spring are in accordance with the provisions of JB/T7757.1. The working deformation shall not exceed 60% of the limit deformation. No rust spots are allowed on the surface of the spring. Coated springs do not allow the coating to peel off. 3.2.3 The physical and chemical properties and appearance accuracy of rubber parts and rubber materials should comply with the requirements of B/T7757.2. 3.2.4 Stamping parts are not allowed to have burrs, wrinkles, rust spots, etc., and the sealing parts are not allowed to have longitudinal stripes. Coated stamping parts are not allowed to have coating peel off.
3.3 Performance requirements
3.3.1 Under the condition of reasonable selection and correct installation and use, the working life of the light mechanical seal shall not be less than 4000h. 3.3.2 The leakage amount of light mechanical seals
The mechanical seals for small submersible electric pumps shall not be greater than 0.1mL/h, and the mechanical seals for internal combustion engine cooling water pumps and other similar rotating machinery shall not be greater than 2mL/h.
3.3.3 Light mechanical seal wear amount
should be able to meet its working life requirements. Test with clean water medium. The wear amount of the seal ring of soft material after 100 hours of operation shall not be greater than 0.02mm.
4 Test methods and acceptance rules
4.1 New light mechanical seal products must undergo type testing according to JB/T6619. 4.2 Before light mechanical seal products leave the factory, each set of seals should be subjected to an air tightness test at the highest working pressure. There should be no visible bubbles for 1 minute. At least one set of each batch of products of the same specification shall be selected for operation test. The test requirements shall be in accordance with the provisions of JB/T6619. 5 Installation and use requirements
5.1 Install the shaft (or sleeve) of the light mechanical seal according to the following requirements. 5.1.1 The radial runout tolerance of the shaft (or sleeve) where the light mechanical seal is installed is 0.04mm. 5.1.2 The surface roughness R value of the shaft (or sleeve) where the auxiliary seal is installed shall not be greater than 1.6um. The outer diameter tolerance of the shaft (or sleeve) is h6. The end of the shaft (or sleeve) where the rotating ring auxiliary seal is installed is chamfered as shown in Figure 1. 5.2 The end of the seat hole for installing the sealing ring is chamfered according to Figure 2. The surface roughness of the contact area with the auxiliary seal is as required in Figure 2, with a smooth transition
10°
R1.6||tt| |Picture 1
2
Net sliding transition
1.5~2
JB/T6619.1-1999
Will
Picture 2
5.3 For small submersible electric pumps, internal combustion engine cooling water pumps and other similar rotating machinery, the axial deflection of the rotor during operation shall not exceed 0 mm. 5.4 When installing a light mechanical seal, the seal itself, shaft (or sleeve), seal cavity and other parts must be cleaned to prevent any impurities from entering the sealing part.
5.5 When installing light mechanical seals, the installation dimensions of the mechanical seals should be ensured according to the product instructions or product samples. 6 Marking and Packaging
6.1 The packaging of the product should be able to prevent damage and loss of parts during transportation and storage. 6.2 The product should be marked with the manufacturer's logo. 6.3 When the product leaves the factory, the product certificate should be included in the packaging box. The certificate of conformity should contain the product model, name, quantity, manufacturer name, signature and date of the inspection department and inspection personnel. 6.4 Several sets are packed in a sealed box. In addition to the identification mark, the product model, name, quantity, manufacturer name, packaging date, etc. should also be marked on the outside of the box.
6.5 There should be product samples or technical documents such as product instructions and packing lists inside the packaging box, and words such as "Handle with Care" and "Moisture-Proof" should be marked on the outside of the box.
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People
China
Republic
Country
Mechanical Industry Standards
Light Mechanical Seal Technical Conditions|| tt | Postal code 100044)*
word count 8,000
1/16 printed sheet 1/2
format 880×1230
First edition in September 1999 First edition in September 1999 Printing quantity 1-500
Pricing 5.00 yuan
No. 99-936
Mechanical Industry Standard Service Network: http:/wwwJB.accn666116199
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