An active safety elevator with a traction host monitoring system

Abstract

The invention discloses an active safety elevator with a traction main machine monitoring system, which belongs to the technical field of elevators. The elevator comprises a shaft and a machine room at the top of the shaft, wherein a car and a counterweight are arranged in the shaft, and a traction main machine, a guide wheel, a first end rope head plate and a terminal rope head plate are arranged in the machine room. A braking mechanism is arranged in the traction main machine, and an elastic reset mechanism and an electromagnetic control structure are arranged in the braking mechanism, so that the action of the braking mechanism can be implemented by the elastic force of the elastic reset mechanism. At this time, the elastic reset mechanism is mainly used to apply elastic force to the brake block, so that the brake block contacts with the brake ring to generate friction, and no energy is consumed for braking. At the same time, a repulsive force can be generated by energizing the first electromagnet and the second electromagnet, so that the brake block is affected by the combined action of the elastic force and the electromagnetic force, and the friction between the brake block and the brake ring is greater, so as to achieve the effect of efficient braking. The elevator has two braking modes, so as to ensure the braking stability of the traction main machine.

Description

Technical Field

[0001] The invention belongs to the technical field of elevators, and in particular relates to an active safety elevator with a traction main engine monitoring system. Background Art

[0002] The traction main machine is the power equipment of the elevator, also known as the elevator main machine. Its function is to transport and transfer power to make the elevator run. When the traction main machine brakes, it mainly relies on the reverse force of the motor and the action of the brake mechanism to make the elevator car stop at any floor.

[0003] In the prior art, as shown in the Chinese patent document with the authorization announcement number CN110342381B, a block-type brake inner rotor traction machine is disclosed, including a machine base, a stator assembly, a rotor assembly, a rotating shaft, a traction wheel, and a block-type brake. The machine base is composed of an opening structure with an outer octagonal shape in the front half and a tray structure with an outer circular shape in the rear half. The stator assembly is installed at the bottom of the tray structure in the rear half of the machine base. The rotor assembly is composed of a brake disc in the front half and an inner rotor in the rear half. The rotor assembly is sleeved on the rotating shaft and pushed to the opening structure in the front half of the machine base. The block-type brake is arranged on the shell outside the opening structure in the front half of the machine base to cooperate with the brake disc on the internal rotor assembly. The problem of large deformation of the machine base caused by braking is effectively solved, and the convenience of installation and maintenance of the traction machine is improved. The structure is novel, the stability is high, the durability is good, and it is helpful to promote the development of the braking technology of the traction machine.

[0004] However, the patented structure mainly achieves the purpose of braking by clamping the brake disc with the brake blocks on both sides to generate friction. The braking method is single, and when the elevator car stops at a certain floor, the brake blocks need to continuously clamp the brake disc, which requires continuous energy consumption and is inconvenient to brake the brake wheel efficiently. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an active safety elevator with a traction main engine monitoring system.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] An active safety elevator with a traction main machine monitoring system comprises a hoistway and a machine room at the top of the hoistway, wherein a car and a counterweight are arranged in the hoistway, a traction main machine, a guide wheel, a first end rope head plate and a terminal rope head plate are arranged in the machine room, a car top return rope pulley is arranged on the top of the car, a counterweight return rope pulley is arranged on the top of the counterweight, the first end rope head plate, the car top return rope pulley, the traction main machine, the guide wheel, the counterweight return rope pulley and the terminal rope head plate are connected in sequence through steel wire ropes, and the traction main machine circuit is connected to a control cabinet for controlling the operation of the elevator; the traction main machine comprises a main machine housing, a traction wheel, a stator, a rotor and a braking mechanism, the stator is fixed in the main machine housing, the rotor is movably arranged in the stator, the rotor extends out of the main machine housing through a traction shaft to connect the traction wheel, the braking mechanism is arranged on the side of the main machine housing, a brake ring for cooperating with the brake mechanism to implement braking is arranged at the rear of the rotor, and the brake mechanism can movably enter the interior of the main machine housing to contact with the brake ring to implement braking of the traction main machine;

[0008] The braking mechanism includes a braking housing, a first electromagnet, a braking circuit board, a second electromagnet, a movable housing, a braking block and an elastic reset mechanism. The braking housing is fixed on the side of the main housing, the first electromagnet and the braking circuit board are installed in the braking housing, the second electromagnet is installed in the movable housing, the first electromagnet and the second electromagnet are arranged opposite to each other, the braking block is fixed on the side of the movable housing facing away from the first electromagnet, the braking block is arranged opposite to each other on the outside of the braking ring, one end of the elastic reset mechanism is connected to the braking housing, and the other end is connected to the movable housing, the elastic reset mechanism maintains a compressed state, the first electromagnet and the second electromagnet are both electrically connected to the braking circuit board, and the braking circuit board is electrically connected to the control cabinet.

[0009] In the present invention, ventilation holes are provided on the side and back of the traction main machine, and centrifugal blades are provided on the back of the brake ring, and the centrifugal blades are fixedly connected to the brake ring.

[0010] In the present invention, the outer diameter of the centrifugal blade is smaller than the outer diameter of the brake ring in the maximum wear state.

[0011] In the present invention, a flange for fixing and mounting a brake ring is provided on the back of the rotor, and the brake ring is detachably mounted on the outer side wall of the flange.

[0012] In the present invention, the outer side wall of the flange is alternately provided with a plurality of first dovetail grooves and a plurality of first dovetail clips, and the inner side wall of the brake ring is alternately provided with a plurality of second dovetail grooves and second dovetail clips, the first dovetail grooves are matched with the second dovetail clips in a one-to-one correspondence, and the first dovetail clips are matched with the second dovetail grooves in a one-to-one correspondence.

[0013] In the present invention, one end face of the flange is provided with a first limit plate protruding toward the outer periphery, and the first limit plate protrudes from the first dovetail groove; the end face of the brake ring is also provided with a second limit plate for axial positioning during installation, and the second limit plate protrudes from the second dovetail groove, and the first limit plate and the second limit plate respectively perform axial positioning on the two end faces of the brake ring.

[0014] In the present invention, a displacement sensor is also installed in the brake housing, the displacement sensor is electrically connected to the brake circuit board, the signal collection end of the displacement sensor is connected to the movable housing, and the displacement sensor monitors the moving position of the movable housing.

[0015] In the present invention, the brake pad is an arc-shaped structure, the arc radius of the brake pad is larger than the radius of the brake ring, and the arc radius of the brake pad with the middle of the arc as the endpoint is collinear with one of the radii of the brake ring, and the arc center of the brake pad is located on the extension line of the corresponding radius of the brake ring away from the brake pad. As the wear of the brake pad increases, the contact area between the brake pad and the brake ring extends from the middle to both ends, and the contact area gradually increases.

[0016] In the present invention, a first fuse is embedded inside the brake ring, the first fuse is located at the maximum wear limit line of the brake ring, the first fuse is circumferentially arranged around the brake ring, and the first fuse is electrically connected to the control cabinet along the rotor power supply line.

[0017] In the present invention, a second fuse is embedded in the brake block, the second fuse is located at the maximum wear limit line of the brake block, the second fuse is extended along the length direction of the arc structure of the brake block, and the second fuse is electrically connected to the brake circuit board.

[0018] The beneficial effects of the present invention are as follows: the active safety elevator is provided with a braking mechanism in the traction main machine, and the braking mechanism is provided with an elastic reset mechanism and an electromagnetic control structure, so that the action of the braking mechanism can be implemented by the elastic force of the elastic reset mechanism. At this time, the elastic reset mechanism is mainly relied on to apply elastic force to the brake block, so that the brake block contacts with the brake ring to generate friction, and no energy consumption is required for braking; at the same time, the first electromagnet and the second electromagnet can be energized to generate a repulsive force, so that the brake block is subjected to the combined action of the elastic force and the electromagnetic force, and the friction between the brake block and the brake ring is greater, achieving an efficient braking effect, with two braking modes, to ensure the braking stability of the traction main machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the overall structure of the elevator in this embodiment;

[0020] Figure 2 Schematic diagram of the connection of the steel wire rope in this embodiment;

[0021] Figure 3 This is a schematic diagram of the structure of the traction main machine of this embodiment;

[0022] Figure 4 Schematic diagram of the internal structure of the traction main machine of this embodiment;

[0023] Figure 5 This is a schematic diagram of the back structure of the traction main machine of this embodiment;

[0024] Figure 6 It is a structural schematic diagram of the braking mechanism of this embodiment in a braking state;

[0025] Figure 7 This is a schematic diagram of the layout of the internal components of the brake housing of this embodiment;

[0026] Figure 8 Schematic diagram of the connection structure between the rotor and the brake ring of this embodiment;

[0027] Fig. 9 for Figure 8 Exploded diagram of

[0028] Fig.10 This is a schematic diagram of the installation structure of the first fuse in this embodiment;

[0029] Fig.11 This is a schematic diagram of the installation structure of the second fuse in this embodiment. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] like Figures 1 to 11As shown, the present embodiment discloses an active safety elevator with a traction main machine monitoring system, comprising a shaft 1 and a machine room 2 located at the top of the shaft 1, wherein a car 3 and a counterweight 4 are arranged in the shaft 1, and a traction main machine 5, a guide wheel 6, a first end rope head plate 7 and a terminal rope head plate 8 are arranged in the machine room 2, a car top return rope pulley 31 is arranged on the top of the car 3, and a counterweight return rope pulley 41 is arranged on the top of the counterweight 4, the first end rope head plate 7, the car top return rope pulley 31, the traction main machine 5, the guide wheel 6, the counterweight return rope pulley 41 and the terminal rope head plate 8 are connected in sequence through a steel wire rope 9, and the circuit of the traction main machine 5 is connected with a circuit for controlling the operation of the elevator The control cabinet 10 of the embodiment of the present invention; the traction main machine 5 includes a main machine housing 51, a traction wheel 52, a stator 53, a rotor 54 and a braking mechanism 55, wherein the stator 53 is fixed in the main machine housing 51, and the rotor 54 is movably arranged in the stator 53. The rotor 54 extends out of the main machine housing 51 through a traction shaft 56 to connect the traction wheel 52. The braking mechanism 55 is arranged on the side of the main machine housing 51, and a braking ring 57 for cooperating with the braking mechanism 55 to implement braking is arranged at the rear of the rotor 54. The braking mechanism 55 can movably enter the interior of the main machine housing 51 and contact with the braking ring 57 to implement braking of the traction main machine 5.

[0032] In this embodiment, the brake mechanism 55 includes a brake housing 551, a first electromagnet 552, a brake circuit board 553, a second electromagnet 554, a movable housing 555, a brake block 556 and an elastic reset mechanism 557. The brake housing 551 is fixed to the side of the host housing 51, the first electromagnet 552 and the brake circuit board 553 are installed in the brake housing 551, the second electromagnet 554 is installed in the movable housing 555, the first electromagnet 552 and the second electromagnet 554 are arranged opposite to each other, and the brake block 556 is fixed to the movable housing 555. The movable housing 555 is on one side facing away from the first electromagnet 552, and the brake block 556 is relatively arranged on the outside of the brake ring 57. One end of the elastic reset mechanism 557 is connected to the brake housing 551, and the other end is connected to the movable housing 555. The elastic reset mechanism 557 remains in a compressed state, so that the elastic reset mechanism 557 can continuously provide elastic force to the movable housing 555 toward the side of the brake ring 57; the first electromagnet 552 and the second electromagnet 554 are both electrically connected to the brake circuit board 553, and the brake circuit board 553 is electrically connected to the control cabinet 10.

[0033] When the traction main machine 5 is running, the first electromagnet 552 and the second electromagnet 554 are both in the energized state, and the first electromagnet 552 and the second electromagnet 554 attract each other, so that the brake block 556 moves to the side away from the brake ring 57, so that the brake block 556 is separated from the brake ring 57, and the elastic reset mechanism 557 is further compressed.

[0034] When the traction main machine 5 is braked, the first electromagnet 552 and the second electromagnet 554 are both in a de-energized state, and the interaction force between the first electromagnet 552 and the second electromagnet 554 disappears. The movable housing 555 moves to the side away from the first electromagnet 552 under the elastic force of the elastic reset mechanism 557, and at the same time drives the second electromagnet 554 and the brake block 556 to move, so that the brake block 556 contacts the brake ring 57 to brake the traction main machine 5. At this time, the brake block 556 is pressed against the side of the brake ring 57 based on the elastic force provided by the elastic reset mechanism 557, so that the brake block 556 6 generates friction with the brake ring 57 to decelerate; when the traction main machine 5 needs a larger friction force to speed up the deceleration, it can be energized through the first electromagnet 552 and the second electromagnet 554, and the first electromagnet 552 and the second electromagnet 554 repel each other to generate an electromagnetic force, so that the pressure applied by the brake block 556 on the brake ring 57 is the sum of the electromagnetic force and the elastic force provided by the elastic reset mechanism 557. The pressure applied by the brake block 556 on the brake ring 57 increases, and the friction force generated between the two increases accordingly, thereby accelerating the deceleration of the traction main machine 5 and allowing the traction main machine 5 to be quickly stopped.

[0035] When the traction main machine 5 stops, the first electromagnet 552 and the second electromagnet 554 are both in a de-energized state, and the interaction force between the first electromagnet 552 and the second electromagnet 554 disappears. Under the elastic force of the elastic reset mechanism 557, the movable housing 555 keeps the brake block 556 in a pressed contact with the brake ring 57, thereby keeping the traction main machine 5 in a stopped state.

[0036] During the operation and braking process of the traction main machine 5, heat will be generated, which will increase the internal temperature of the traction main machine 5, and heat dissipation is required to ensure the working performance of the traction main machine 5. The traction main machine 5 of the prior art mainly relies on the main machine shell 51 to transfer heat outward to achieve heat dissipation, and the heat dissipation efficiency is low. In order to solve the above problems, ventilation holes 511 are opened on the side and back of the traction main machine 5, and the back of the brake ring 57 is provided with centrifugal blades 58, and the centrifugal blades 58 are fixedly connected to the brake ring 57. When the rotor 54 in the traction main machine 5 rotates, the centrifugal blades 58 rotate accordingly, so that ventilation and heat dissipation are achieved inside the traction main machine 5, so that the heat dissipation effect inside the traction main body is improved, and the centrifugal blades 58 rotate together with the rotor 54, without the need for additional power devices, so that the manufacturing cost and energy consumption of the traction main machine 5 will not increase too much, and industrial application can be achieved. Moreover, the centrifugal fan blades 58 rotate with the rotor 54, and the traction main machine 5 generates heat during operation and braking. During this process, the rotor 54 is in a rotating state, that is, the traction main machine 5 of this structure can ventilate and dissipate heat while generating heat, thereby avoiding heat accumulation inside the traction main machine 5.

[0037] In the present embodiment, in order to prevent the brake block 556 from contacting the centrifugal blades 58 and causing damage to the centrifugal blades 58 when the traction main machine 5 is braked, the outer diameter of the centrifugal blades 58 is smaller than the outer diameter of the brake ring 57 in the maximum wear state, so that the outer ring of the centrifugal blades 58 is located within the maximum wear limit line of the brake ring 57. Therefore, even if the brake ring 57 reaches the maximum wear during use, the outer ring of the centrifugal blades 58 is still located inside the outer ring of the brake ring 57. At this time, when the traction main machine 5 is braked, the brake block 556 will not contact the centrifugal blades 58, thereby ensuring that the centrifugal blades 58 are intact.

[0038] Furthermore, the back of the rotor 54 is provided with a flange 541 for fixing and installing a brake ring 57, and the brake ring 57 is detachably installed on the outer side wall of the flange 541. When the brake ring 57 is worn to a certain extent and needs to be replaced, it is only necessary to remove the brake ring 57 from the flange 541 and replace it with a new brake ring 57, without replacing other parts, and without additionally increasing the maintenance cost of the traction main machine 5. Preferably, the outer side wall of the flange 541 is alternately provided with a plurality of first dovetail grooves 542 and a plurality of first dovetail clamping strips 543, and the inner side wall of the brake ring 57 is alternately provided with a plurality of second dovetail grooves 571 and a second dovetail clamping strip 572, and the first dovetail groove 542 is adapted to the second dovetail clamping strip 572 in a one-to-one correspondence, and the first dovetail clamping strip 543 is adapted to the second dovetail groove 571 in a one-to-one correspondence. When installing the brake ring 57, it is only necessary to slide the second dovetail groove 571 and the second dovetail clamping strip 572 of the brake ring 57 corresponding to the first dovetail clamping strip 543 and the first dovetail groove 542 of the flange 541 respectively to complete the radial and circumferential positioning of the brake ring 57, and then use bolts and other connecting parts to fix the brake ring 57 to the flange 541 to complete the installation. Preferably, in order to achieve axial positioning of the brake ring 57 during installation, one end face of the flange 541 is provided with a first limit plate 544 protruding toward the outer periphery, and the first limit plate 544 protrudes from the first dovetail groove 542; similarly, the end face of the brake ring 57 is also provided with a second limit plate 573 for axial positioning during installation, and the second limit plate 573 protrudes from the second dovetail groove 571. When the brake ring 57 is installed and matched with the flange 541, the first limit plate 544 and the second limit plate 573 respectively perform axial positioning on the two end faces of the brake ring 57, so that the assembly accuracy of the brake ring 57 is improved. After installation, the position of the brake ring 57 is opposite to the brake block 556, thereby ensuring that the braking performance of the traction main machine 5 is stable and reliable.

[0039] In this embodiment, a displacement sensor 59 is also installed in the brake housing 551. The displacement sensor 59 is electrically connected to the brake circuit board 553, and the signal acquisition end of the displacement sensor 59 is connected to the mobile housing 555. The displacement sensor 59 can monitor the moving position of the mobile housing 555, and the mobile housing 555 and the brake block 556 are relatively fixed, so the displacement sensor 59 can monitor the moving position of the brake block 556. When the traction host 5 is running, the brake block 556 needs to be separated from the brake ring 57, and the brake block 556 moves to the side close to the brake housing 551. At this time, the distance between the brake block 556 and the brake housing 551 is set as the separation distance. The brake block 556 is completely separated from the brake ring 57, and the traction host 5 can run. In actual applications, the displacement signal monitored by the displacement sensor 59 can be used to determine whether the braking mechanism 55 is working normally. When the traction main machine 5 needs to operate, the first electromagnet 552 and the second electromagnet 554 are energized and generate a force of mutual attraction. The mobile housing 555 and the brake block 556 move together to the side away from the brake ring 57. At this time, the displacement signal monitored by the displacement sensor 59 is converted into the distance between the brake block 556 and the brake housing 551 to determine whether it is less than the set separation distance; if it is less than, the brake block 556 is completely separated from the brake ring 57, the brake mechanism 55 is working normally, and the traction main machine 5 can operate; if it is greater than or equal to, the brake block 556 is not completely separated from the brake ring 57, the brake mechanism 55 is working abnormally, a fault signal is sent out, and the traction main machine 5 does not operate.

[0040] Furthermore, the brake block 556 is an arc-shaped structure, the arc radius of the brake block 556 is larger than the radius of the brake ring 57, and the arc radius of the brake block with the middle of the arc as the endpoint is collinear with one of the radii of the brake ring, and the arc center of the brake block 556 is located on the extension line of the corresponding radius of the brake ring 57 away from the brake block 556, so that the brake block 556 does not produce wear. When the traction main machine 5 is braked and / or stopped, the arc middle part of the brake block 556 contacts and cooperates with the brake ring 57. At this time, the contact area is smaller, and the contact area between the two is smaller. The surface friction performance of the brake block 556 is better when it is not worn, and even if the contact area is smaller, it can provide better braking force. As the wear of the brake block 556 increases, when the traction main machine 5 is braked and / or stopped, the contact area between the brake block 556 and the brake ring 57 extends from the middle to both ends, and the contact area gradually increases. As the wear of the brake block 556 increases, its surface friction performance decreases. By increasing the contact area between the two, the brake block 556 can maintain good braking performance during long-term use.

[0041] In addition, since the brake ring 57 and the brake block 556 are both located inside the traction main machine 5, the traction main machine 5 needs to be disassembled when the wear condition is checked, and the inspection work is very inconvenient. Therefore, it is necessary to monitor the wear condition of the brake ring 57 and the brake block 556, so that the maintenance personnel can know in time when the brake ring 57 and / or the brake block 556 reach the maximum wear amount, and replace the brake ring 57 and / or the brake block 556. Specifically, the brake ring 57 and the brake block 556 are respectively embedded with a first fuse 574 and a second fuse 5561, the first fuse 574 is located at the position of the maximum wear limit line of the brake ring 57, the first fuse 574 is circumferentially arranged around the brake ring 57, and the first fuse 574 is electrically connected to the control cabinet 10 along the rotor 54 power line; the second fuse 5561 is located at the position of the maximum wear limit line of the brake block 556, the second fuse 5561 is extended along the arc structure length direction of the brake block 556, and the second fuse 5561 is electrically connected to the brake circuit board 553. When the wear of the brake ring 57 and / or the brake block 556 reaches the maximum value, the contact and cooperation between the brake ring 57 and the brake block 556 will frictionally cut off the first fuse 574 and / or the second fuse 5561, thereby cutting off the corresponding electrical signal transmission. After receiving the corresponding cut-off signal, the control cabinet 10 will send an early warning message to the outside, so that the maintenance personnel can promptly know the wear status of the brake ring 57 and the brake block 556, and replace the corresponding wear parts in time.

[0042] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means belongs to the protection scope of the present invention.

Claims

1. An active safety elevator with a traction main machine monitoring system, comprising a hoistway (1) and a machine room (2) located at the top of the hoistway (1), wherein a car (3) and a counterweight (4) are arranged in the hoistway (1), wherein a traction main machine (5), a guide wheel (6), a first end rope head plate (7) and a terminal rope head plate (8) are arranged in the machine room (2), wherein a car top return rope pulley (31) is arranged at the top of the car (3), and a counterweight return rope pulley (41) is arranged at the top of the counterweight (4), wherein the first end rope head plate (7), the car top return rope pulley (31), the traction main machine (5), the guide wheel (6), the counterweight return rope pulley (41) and the terminal rope head plate (8) are connected in sequence through a steel wire rope (9), and the traction main machine (5) is connected to a control cabinet (10) for controlling the operation of the elevator through an electric circuit; characterized in that: The traction main machine (5) comprises a main machine housing (51), a traction wheel (52), a stator (53), a rotor (54) and a brake mechanism (55); the stator (53) is fixed in the main machine housing (51); the rotor (54) is movably arranged in the stator (53); the rotor (54) extends out of the main machine housing (51) through a traction shaft (56) to connect to the traction wheel (52); the brake mechanism (55) is arranged on the side of the main machine housing (51); a brake ring (57) for cooperating with the brake mechanism (55) to implement braking is arranged at the rear of the rotor (54); the brake mechanism (55) can movably enter the interior of the main machine housing (51) and contact with the brake ring (57) to implement braking of the traction main machine (5); The braking mechanism (55) comprises a braking housing (551), a first electromagnet (552), a braking circuit board (553), a second electromagnet (554), a movable housing (555), a braking block (556) and an elastic reset mechanism (557); the braking housing (551) is fixed to a side of a main housing (51); the first electromagnet (552) and the braking circuit board (553) are installed in the braking housing (551); the second electromagnet (554) is installed in the movable housing (555); the first electromagnet (552) and the second electromagnet (554) are connected to each other; 4) are arranged relatively, the brake block (556) is fixed on the side of the movable housing (555) facing away from the first electromagnet (552), the brake block (556) is arranged relatively on the outside of the brake ring (57), one end of the elastic reset mechanism (557) is connected to the brake housing (551), and the other end is connected to the movable housing (555), the elastic reset mechanism (557) maintains a compressed state, the first electromagnet (552) and the second electromagnet (554) are both electrically connected to the brake circuit board (553), and the brake circuit board (553) is electrically connected to the control cabinet (10); Ventilation holes (511) are provided on the side and back of the traction main machine (5); a centrifugal blade (58) is provided on the back of the brake ring (57); the centrifugal blade (58) is fixedly connected to the brake ring (57); the outer diameter of the centrifugal blade (58) is smaller than the outer diameter of the brake ring (57) in a state of maximum wear; the brake block (556) is an arc-shaped structure; the arc radius of the brake block (556) is larger than the radius of the brake ring (57); the arc radius of the brake block (556) with the middle of the arc as the endpoint is colinear with one of the radii of the brake ring (57); the arc center of the brake block (556) is located on an extension line of the corresponding radius of the brake ring (57) away from the brake block (556); as the wear of the brake block (556) increases, the contact area between the brake block (556) and the brake ring (57) extends from the middle to both ends, and the contact area gradually increases.

2. An active safety elevator with a traction main machine monitoring system according to claim 1, characterized in that: The back of the rotor (54) is provided with a flange (541) for fixedly mounting a brake ring (57); the brake ring (57) is detachably mounted on the outer side wall of the flange (541).

3. The active safety elevator with a traction main machine monitoring system according to claim 2, characterized in that: The outer side wall of the flange (541) is alternately provided with a plurality of first dovetail grooves (542) and a plurality of first dovetail clamping strips (543); the inner side wall of the brake ring (57) is alternately provided with a plurality of second dovetail grooves (571) and a second dovetail clamping strip (572); the first dovetail grooves (542) and the second dovetail clamping strips (572) are matched one-to-one; and the first dovetail clamping strips (543) and the second dovetail grooves (571) are matched one-to-one.

4. The active safety elevator with a traction main machine monitoring system according to claim 3, characterized in that: One end surface of the flange (541) is provided with a first limit plate (544) protruding toward the outer circumference, and the first limit plate (544) protrudes from the first dovetail groove (542); the end surface of the brake ring (57) is also provided with a second limit plate (573) for axial positioning during installation, and the second limit plate (573) protrudes from the second dovetail groove (571), and the first limit plate (544) and the second limit plate (573) respectively perform axial positioning on the two end surfaces of the brake ring (57).

5. The active safety elevator with a traction main machine monitoring system according to claim 1, characterized in that: A displacement sensor (59) is also installed in the brake housing (551); the displacement sensor (59) is electrically connected to the brake circuit board (553); a signal collection end of the displacement sensor (59) is connected to the movable housing (555); and the displacement sensor (59) monitors the moving position of the movable housing (555).

6. The active safety elevator with a traction main machine monitoring system according to claim 1, characterized in that: A first fuse (574) is embedded in the brake ring (57), the first fuse (574) is located at a position of a maximum wear limit line of the brake ring (57), the first fuse (574) is circumferentially arranged around the brake ring (57), and the first fuse (574) is electrically connected to the control cabinet (10) along a rotor (54) power line.

7. The active safety elevator with a traction main machine monitoring system according to claim 1, characterized in that: A second fuse (5561) is embedded inside the brake block (556); the second fuse (5561) is located at the maximum wear limit line of the brake block (556); the second fuse (5561) is extended along the length direction of the arc structure of the brake block (556); and the second fuse (5561) is electrically connected to the brake circuit board (553).

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