JB/T 8808-1998 This standard specifies the type, basic parameters and main dimensions, technical requirements, test methods, inspection rules and packaging, storage and transportation of DLM2 electromagnetic clutch. This standard applies to DLM2 dry, multi-friction plate, coil rotary electromagnetic clutch, with a nominal torque of 630~25000N·m, a working environment temperature of -20~50℃, and a relative humidity not exceeding 80%. (Note: This standard will replace JB/ZQ 4385-86 "DKM2 Electromagnetic Clutch" from the date of its entry into force.) JB/T 8808-1998 DLM2 Electromagnetic Clutch JB/T8808-1998 Standard Download Decompression Password: www.bzxz.net

JB/T8808-1998
Appendix A of this standard is the appendix of the standard.
Appendix B of this standard is the appendix of the suggestion.
This standard is proposed and managed by Xi'an Heavy Machinery Research Institute of the Ministry of Machinery Industry. The drafting unit of this standard: First Heavy Machinery Group Corporation. The main drafters of this standard: Shi Gang and Liu Zhen. 123
Machinery Industry Standard of the People's Republic of China
DLM2 Electromagnetic Clutch
DLM2 Electromagnetic Clutch
JB/T 8808.-7998
This standard specifies the type, basic parameters, main dimensions, technical requirements, test methods, inspection rules, packaging, storage and transportation of DI.M2 electromagnetic clutch.
This standard applies to DI.M2 dry, multi-friction plate, coil rotary electromagnetic clutch, nominal torque 6302500>N·m, working environment temperature -20 ~ +50℃, relative humidity not exceeding 80%. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB19190 Packaging, storage and transportation graphic symbols
GB/T1184-1996 Tolerance of shape and position without tolerance value GB/T3478.11995 Cylindrical spur involute spline module basic number of teeth tolerance
GB/T3852--1997 Coupling shaft hole and keyway types and dimensions GB487985 Rust-proof packaging
GB9239—88 Determination of allowable imbalance of rigid rotor balance quality 3 Types, basic parameters and main dimensions
3.1 Type
\-The type of DI.M2 electromagnetic clutch is shown in Figure 1; the shaft hole type shall be J type and Z type as specified in GB/T3852; -The keyway type and size of the shaft hole shall be A type and C type as specified in GB/T3852. 3.2 Basic parameters and main dimensions
The basic parameters and main dimensions of the DLM2 electromagnetic clutch (hereinafter referred to as the clutch) are shown in Table 1. The types and installation dimensions of the brush holder used with the clutch are shown in Appendix A (standard appendix), and the types and dimensions of the protective cover are shown in Appendix B (suggestive appendix). Approved by the State Machinery Industry Bureau on September 30, 1998 1241
Implemented on December 1, 1998
3.3 Electrical parameters
3.3.1 Control circuit of the clutch (see Figure 2). o
JB/T8808-
Figure 1 Clutch structure type
SJ--Time relay (control strong excitation time); C-discharge capacitor;
J-Relay (strong excitation and rated excitation conversion)CJ-Contactor (operating clutch); R--voltage dividing resistor;
CI.-Electromagnetic clutch coil;
The strong excitation time controlled by the time relay is 1~2 s. Figure 2
3.3.2 Parameters of electrical components of clutch control circuit (see Table 2). CL
8808--1998
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DLM2-630
DLM2-1000
Dl.M2-1600
DLM2-2500
DLM2-4000
DLM2-6300
DLM2-10000
DLM2-16000
DIM2-25000
Holding power
JB/T8808--1998
Table 2 Electrical component parameters
Coil C (75 ()
Holding current Holding voltage
Discharge capacitance (||tt| |Rated voltage
When DC 220V is strongly excited, the strong magnetic excitation current is about 6.1 times the holding current, and the power is about 37.3 times. 2 Use a DC capacitor for discharge capacitance.
3 The power consumption of the voltage-dividing resistor depends on the resistance value. When selecting the voltage-dividing resistor, sufficient margin should be left. 4 Product marking
Marking method
Driven end shaft hole type code
Nominal torque
Clutch model
4.2 Marking example
Chain chair type code
Keyway type code
Driven end shaft hole type code
Shaft hole true diameter
Shaft length
Voltage-dividing resistor R
JB/T 8808--1998
Shaft hole length
Shaft hole diameter
Example 1 The nominal torque of DLM2 electromagnetic clutch is 1000N·m; driving end: J-type shaft hole, A-type keyway, shaft hole diameter d=55mm, shaft hole length L-84mm; driven end: Z-type shaft hole, C-type keyway, shaft hole diameter d,=48mm, shaft hole length L-84mmDLM2-1000
J55 × 84
ZC48 X 84
JB/T 8808-1998
Example 2: The nominal torque of the DLM2 electromagnetic clutch is 1000N·m; manual end: J-type shaft hole, A-type keyway, shaft hole diameter d=50mm, shaft hole length L=84mm; driven end: J-type shaft hole, A-type keyway, shaft hole diameter d=50mm, shaft hole length I=84mmDLM2-1000J50X84JB/T8808—1998127
5 Technical requirements
JB/T8808-1998
The clutch shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5.2 The clutch torque is allowed to have a deviation of 5% to 10%. 5.3 The magnet and armature should be made of low carbon steel with a content of less than 0.09%. 5.4 The outer gear sleeve and inner gear ring should be made of metallurgical structural steel, and its mechanical properties should meet the following requirements: a) α = 700N/mm;
b) aa.2 ≥ 500N/mm;
c) Aiu2 ≥ 31 J;
d) 269-~302 HB.
5.5 The magnetic isolation ring should be made of austenitic stainless steel. 5.6 The friction material of the friction plate should be copper-based powder metallurgy friction material, and its mechanical properties should meet the following requirements: a) static friction coefficient μ ≥ 0.35;
b) hardness ≥ 40 HB;
c) compressive strength = 140 N/cm2
5.7 The parallelism of the two end faces of the friction plate and the circular runout to the top circle shall be in accordance with the 7th grade tolerance in Appendix B of GB/T1184-1996; the surface degree shall be in accordance with the 6th grade tolerance in Appendix B of GB/T1184-1996. 5.8 The precision of the involute spline shall be in accordance with the 6th grade tolerance in GB/T3478.1. 5.9 After assembly, a static balance test shall be carried out, and the balance accuracy shall comply with the provisions of GB9239. 5.10 All exposed metal surfaces shall be oxidized , special requirements should be indicated when ordering. 5.11 The insulation resistance of the excitation coil to the ground shall not be less than 1×10°05.12 When installing the clutch, the coaxiality of the axis of the half coupling at both ends shall comply with the provisions of Table 3. Table 3 Coaxiality of the axis at both ends
DLM2-630.DLM2-1000.DLM2-1600DLM2-2500.DLM2-4000.DLM2-6300DLM2-10000,DLM2-16000,DLM2-2 50006 Test method
6.1 Static balancing is performed on a roller or rail type static balancing frame. Axis
6.2 Static friction torque is measured on a lever type torque test bench. Static friction torque is generated by applying a force to one end of the lever until the inner and outer friction plates slide relative to each other, and then the torque value is calculated. 6.3 Use a 500V megohmmeter to measure the insulation resistance of the excitation coil to the ground. 6.4 Determination of power-on action time and power-off action time: Connect the dynamic oscilloscope in parallel to the excitation coil. The coil is connected to the excitation coil sleeve, and the action time is measured by the development of the voltage change on the time scale. Or the dynamic oscilloscope is connected to the excitation coil sleeve, and the action time is measured by the development of the current change on the time scale. 7 Inspection rules
7.1 Factory inspection
Each clutch shall be inspected and qualified by the manufacturer in accordance with the provisions of this standard before it can be shipped out of the factory. Items that fail the inspection must be re-repaired until they pass.
7.1.1 Inspection of the clutch: The torque, air gap and on/off action time shall comply with 3.2 and 5.2. 128
JB/T8808-1998
7.1.2 The insulation resistance of the excitation coil shall comply with the provisions of 5.11. 7.1.3 The static balance test of the clutch shall be carried out, and the accuracy shall meet the provisions of 5.9. If a dynamic balance test is required, it should be indicated when ordering. 7.2 Type inspection
The type inspection of the clutch shall include the electrical parameters of the excitation coil in 3.2, 3.3.2 and all items in Chapter 5 (except 5.11). Type inspection shall be carried out when one of the following situations occurs: a) When each specification of clutch is produced for the first time; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance; c) When the factory inspection results are significantly different from the last type inspection; d) When the national quality supervision agency proposes a requirement for type inspection. 8 Marking, packaging, transportation and storage
8.1 There should be a product label on the obvious part of the clutch, and the product label should indicate the following: a) Manufacturer name (or trademark);
b) Clutch model;
c) Nominal torque:
d) Holding/strong excitation voltage;
e) Holding power (at 75℃);
f) Date of publication.
8.2 The clutch should be packaged in accordance with the provisions of Class C of rust-proof packaging in GB4879, and the markings on the outer packaging should comply with the provisions of GB191. 8.3 The following documents should be attached to the clutch packaging box: a) Product certificate;
b) Clutch instruction manual;
c) Packing list:
d) Installation drawing.
8.4 The clutch should be stored in a dry environment indoors to avoid contact with substances such as acids, alkalis and organic solvents. After one year of storage, the products should be unpacked for inspection and repacked according to the provisions of 8.2.
JB/T8808-1998
Appendix A
(Appendix of the standard)
Type and installation dimensions of clutch brush holder The type and installation dimensions of the brush holder shall be in accordance with Figure A1 and Table A1 (see Table 1 in the text of the standard for L? dimensions). d
Structure type of brush holder
Clutch model
DLM2-630
DLM2-1000
DLM2-1600
DI.M2-2500
DLM2-4000
DLM2-6300
DLM2-10000
DLM2-16000
DLM2-25000
Installation size of brush holder
Note: The brush holder is an accessory of the clutch and is delivered with the clutch. 130
—1998
JB/T8808
Appendix B
(Suggestive Appendix)
Type and size of clutch protective cover
In dusty, steamy, oily or water dripping environments, it is recommended to use a clutch protective cover. See Figure B1 and Table B1 for the structural type and size of the protective cover. B3
Clutch model
DLM2-630
DLM2-1000
DLM2-1600
DLM2-2500
DLM2-4000
DI.M2-6300
DLM2-10000
DLM2-16000
DLM2-25000
See Table B in the standard text Table 1
Protective cover structure type
2Protective cover H size shall be based on actual needs but shall not be less than 200mm. Protective cover size
Protective cover is only provided when required by the user and shall be stated when ordering. Ls
See Note 2
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