Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. Issuance organization of this standard shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by and is under the jurisdiction of China Elevator Association.
Introduction
As the core safety component of lifts, the brake plays an important role in the safety, reliability and comfort of lifts. This standard is formulated in view of improving safe operation of lifts, preventing lift accidents resulting from any malfunction of brake, and standardizing the requirements for design, manufacture, installation, commissioning, repair, maintenance and replacement of the electromagnetic brake of lifts.
Electromagnetic brake of lifts
1 Scope
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, as well as other requirements of electromagnetic brake (friction type) for passenger and freight lift machine.
This standard is applicable to electromagnetic brake (friction type) of traction passenger and freight lifts with rated speed no more than 8 m/s and of positive drive passenger and freight lifts with rated speed no more than 0.63 m/s.
This standard is not applicable to hydraulic brakes and other types of brakes.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191-2008 Packaging—Pictorial marking for handling of goods
GB 4706.1-2005 Household and similar electrical appliances—Safety—Part 1: General requirements
GB 7588 Safety rules for the construction and installation of electric lifts
GB/T 24478-2009 Traction machine of electric lifts
GB/T 26665-2011 Brake vocabulary
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 26665 apply.
3.1
electromagnetic brake
electromechanical brake with electromagnetic force to eliminate the brake function
3.2
drum brake
brake that uses the cylindrical surface of the component to be braked as the braking surface (braking friction surface)
3.3
lever drum brake
drum brake in which the force of a braking element (a compression spring with guide or a heavy weight) is amplified by lever action and then applied to the braking surface
3.4
direct pressure drum brake
drum brake in which the force of a braking element is directly applied to the braking surface
3.5
disc brake
brake that uses the end surface of the component to be braked as the braking surface
3.6
caliper disc brake
disc brake in which the force of a braking element is applied to the braking surface in a clamping manner, with the friction material (brake lining or friction lining) covering a part of the braking surface only
3.7
shaft full disc brake
disc brake in which the force of a braking element is applied to the braking surface in an axial pushing manner, with the friction material covering the whole braking surface
3.8
electromagnet
electromagnet generally comprising an iron core without electromagnetic coils (also called armature, plunger, etc.), coils (also called electromagnetic coils, excitation coils, etc.) and an iron core with electromagnetic coils (also called magnetic coil core, electromagnet core, coil holder, armature, etc.), in which, when energized, the electromagnetic coils is used for excitation, while the iron core and magnetic coil core act as magnetic conductors, between which electromagnetic force is generated, making them move relatively when the brake is powered on or off
3.9
moving iron core
electromagnet core and/or magnetic coil core which moves when the brake is powered on or off
3.10
pick up
process in which the electromagnetic force generated when the brake is energized enables the moving iron core to move against the force of a braking element, until the braking torque is down to zero
3.11
minimum picking up current
minimum current for picking up action of the brake
3.12
minimum picking up voltage
minimum voltage for picking up action of the brake
3.13
picking up response time
time required from the brake being energized until picking up in place
3.14
release
process in which the electromagnetic force is attenuate and the moving iron core moves under the force of a braking element to generate braking torque after the brake is powered off
3.15
maximum release current
maximum current for release action of the brake
3.16
maximum release voltage
maximum voltage for release action of the brake
3.17
release response time
time required from the brake being de-energized until the braking torque reaching the rated value
3.18
rated picking up current
stable current continuously input to enable the brake to complete the picking up action
3.19
rated picking up voltage
stable voltage continuously input to enable the brake to complete the picking up action
3.20
rated holding current
stable current continuously input to enable the brake to maintain the picking up status
3.21
rated holding voltage
stable voltage continuously input to enable the brake to maintain the picking up status
3.22
magnetic gap
gap between electromagnet core and magnetic coil core in the case of brake power off
3.23
friction lining gap
gap between friction lining (brake lining) and braking surface after picking up of brake
3.24
action stroke
total displacement of moving iron core during picking up or releasing of the brake
3.25
static braking torque
torque required to enable the stationary braking surface while the brake is in a braking state
3.26
dynamic braking torque
torque required to enable the braking surface to rotate at a uniform speed or from the rated speed to zero while the brake is in a braking state
4 Technical requirements
The electromagnetic brake of the lift machine shall comply with the following requirements.
4.1 Operating conditions
a) The altitude shall be 1 000 m at most. If it is more than 1 000 m, it shall be corrected in accordance with GB/T 24478-2009.
b) The ambient temperature shall be maintained at +5°C to +40°C.
c) Humidity: the relative air humidity at the operating site shall not exceed 50% at a maximum temperature of +40°C; a high relative humidity is allowed at a low temperature, but in the wettest month, the monthly average minimum temperature shall not exceed +25°C, and the monthly average maximum relative humidity shall not exceed 90%. If condensation may occur on the equipment, corresponding measures shall be taken.
d) Air: the ambient air shall not contain any corrosive and flammable gases.
The manufacturer shall negotiate with the user for operating conditions beyond the aforementioned range.
4.2 Performance requirements
4.2.1 General
The electromagnetic brake of the lift machine shall comply with the following requirements.
a) The pressure of the braking surface (braking friction surface) shall be applied by a compression spring with guide or a heavy weight.
b) The brake is valid in the case of power loss.
c) The brake shall be kept in a pick-up state only when it is continuously energized, except when emergency operation allows.
d) When emergency operation allows, the brake of lift machine shall be picked up by means of continuous manual operation. Such operation can be realized by machinery (e.g., a lever) or electrical devices powered by emergency power supply.
e) The withstand voltage test of the brake coils shall meet the requirement that the conductive part shall apply an AC voltage of not less than 1 000 V to the ground for 1 min without breakdown.
Foreword i Introduction ii 1 Scope 2 Normative references 3 Terms and definitions 4 Technical requirements 5 Test methods 6 Inspection rules 7 Nameplate 8 Warning and marking 9 Packaging and transportation 10 Storage 11 Maintenance and adjustment
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. Issuance organization of this standard shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by and is under the jurisdiction of China Elevator Association.
Introduction
As the core safety component of lifts, the brake plays an important role in the safety, reliability and comfort of lifts. This standard is formulated in view of improving safe operation of lifts, preventing lift accidents resulting from any malfunction of brake, and standardizing the requirements for design, manufacture, installation, commissioning, repair, maintenance and replacement of the electromagnetic brake of lifts.
Electromagnetic brake of lifts
1 Scope
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, as well as other requirements of electromagnetic brake (friction type) for passenger and freight lift machine.
This standard is applicable to electromagnetic brake (friction type) of traction passenger and freight lifts with rated speed no more than 8 m/s and of positive drive passenger and freight lifts with rated speed no more than 0.63 m/s.
This standard is not applicable to hydraulic brakes and other types of brakes.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191-2008 Packaging—Pictorial marking for handling of goods
GB 4706.1-2005 Household and similar electrical appliances—Safety—Part 1: General requirements
GB 7588 Safety rules for the construction and installation of electric lifts
GB/T 24478-2009 Traction machine of electric lifts
GB/T 26665-2011 Brake vocabulary
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 26665 apply.
3.1
electromagnetic brake
electromechanical brake with electromagnetic force to eliminate the brake function
3.2
drum brake
brake that uses the cylindrical surface of the component to be braked as the braking surface (braking friction surface)
3.3
lever drum brake
drum brake in which the force of a braking element (a compression spring with guide or a heavy weight) is amplified by lever action and then applied to the braking surface
3.4
direct pressure drum brake
drum brake in which the force of a braking element is directly applied to the braking surface
3.5
disc brake
brake that uses the end surface of the component to be braked as the braking surface
3.6
caliper disc brake
disc brake in which the force of a braking element is applied to the braking surface in a clamping manner, with the friction material (brake lining or friction lining) covering a part of the braking surface only
3.7
shaft full disc brake
disc brake in which the force of a braking element is applied to the braking surface in an axial pushing manner, with the friction material covering the whole braking surface
3.8
electromagnet
electromagnet generally comprising an iron core without electromagnetic coils (also called armature, plunger, etc.), coils (also called electromagnetic coils, excitation coils, etc.) and an iron core with electromagnetic coils (also called magnetic coil core, electromagnet core, coil holder, armature, etc.), in which, when energized, the electromagnetic coils is used for excitation, while the iron core and magnetic coil core act as magnetic conductors, between which electromagnetic force is generated, making them move relatively when the brake is powered on or off
3.9
moving iron core
electromagnet core and/or magnetic coil core which moves when the brake is powered on or off
3.10
pick up
process in which the electromagnetic force generated when the brake is energized enables the moving iron core to move against the force of a braking element, until the braking torque is down to zero
3.11
minimum picking up current
minimum current for picking up action of the brake
3.12
minimum picking up voltage
minimum voltage for picking up action of the brake
3.13
picking up response time
time required from the brake being energized until picking up in place
3.14
release
process in which the electromagnetic force is attenuate and the moving iron core moves under the force of a braking element to generate braking torque after the brake is powered off
3.15
maximum release current
maximum current for release action of the brake
3.16
maximum release voltage
maximum voltage for release action of the brake
3.17
release response time
time required from the brake being de-energized until the braking torque reaching the rated value
3.18
rated picking up current
stable current continuously input to enable the brake to complete the picking up action
3.19
rated picking up voltage
stable voltage continuously input to enable the brake to complete the picking up action
3.20
rated holding current
stable current continuously input to enable the brake to maintain the picking up status
3.21
rated holding voltage
stable voltage continuously input to enable the brake to maintain the picking up status
3.22
magnetic gap
gap between electromagnet core and magnetic coil core in the case of brake power off
3.23
friction lining gap
gap between friction lining (brake lining) and braking surface after picking up of brake
3.24
action stroke
total displacement of moving iron core during picking up or releasing of the brake
3.25
static braking torque
torque required to enable the stationary braking surface while the brake is in a braking state
3.26
dynamic braking torque
torque required to enable the braking surface to rotate at a uniform speed or from the rated speed to zero while the brake is in a braking state
4 Technical requirements
The electromagnetic brake of the lift machine shall comply with the following requirements.
4.1 Operating conditions
a) The altitude shall be 1 000 m at most. If it is more than 1 000 m, it shall be corrected in accordance with GB/T 24478-2009.
b) The ambient temperature shall be maintained at +5°C to +40°C.
c) Humidity: the relative air humidity at the operating site shall not exceed 50% at a maximum temperature of +40°C; a high relative humidity is allowed at a low temperature, but in the wettest month, the monthly average minimum temperature shall not exceed +25°C, and the monthly average maximum relative humidity shall not exceed 90%. If condensation may occur on the equipment, corresponding measures shall be taken.
d) Air: the ambient air shall not contain any corrosive and flammable gases.
The manufacturer shall negotiate with the user for operating conditions beyond the aforementioned range.
4.2 Performance requirements
4.2.1 General
The electromagnetic brake of the lift machine shall comply with the following requirements.
a) The pressure of the braking surface (braking friction surface) shall be applied by a compression spring with guide or a heavy weight.
b) The brake is valid in the case of power loss.
c) The brake shall be kept in a pick-up state only when it is continuously energized, except when emergency operation allows.
d) When emergency operation allows, the brake of lift machine shall be picked up by means of continuous manual operation. Such operation can be realized by machinery (e.g., a lever) or electrical devices powered by emergency power supply.
e) The withstand voltage test of the brake coils shall meet the requirement that the conductive part shall apply an AC voltage of not less than 1 000 V to the ground for 1 min without breakdown.
Contents of T/CEA 021-2019
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
5 Test methods
6 Inspection rules
7 Nameplate
8 Warning and marking
9 Packaging and transportation
10 Storage
11 Maintenance and adjustment
