Outer rotor permanent magnet synchronous traction machine

Abstract

The utility model provides an outer rotor permanent magnet synchronous traction machine which comprises an outer rotor permanent magnet traction machine body, and a brake, a traction wheel and an installation disc are installed on the outer rotor permanent magnet traction machine body. A cover cap is fixedly mounted on the isolation cover integrally arranged on the mounting disc through a fastener; two inlets and outlets are formed in the isolation cover, two flow dividing boxes and four spray head seats are fixedly mounted on the isolation cover, a plurality of airflow spray heads are arranged on each spray head seat, each flow dividing box is communicated with the two corresponding spray head seats through communicating pipes, and an air pump is mounted on each flow dividing box; compared with a traditional sealing cover, the protection grade is greatly improved, and impurities are effectively prevented from invading the traction machine through gaps. The crossed airflow nozzles spray air directionally, impurities on the surface of the steel cable are cleaned in real time when the steel cable enters and exits, and the pollution risk is reduced from the source. The crossed gas beam covers the circumferential surface of the steel cable and is pretreated before the steel cable is in contact with the traction wheel, so that impurity deposition is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of traction machine, especially relates to a outer rotor permanent magnet synchronous traction machine. BACKGROUND

[0002] The outer rotor permanent magnet synchronous traction machine is widely applied to modern elevator system owing to the advantages of compact structure and efficient transmission. However, its operation reliability is plagued by the problem of impurity invasion for a long time: the gap of the outer rotor structure is easy to become the invasion channel of external dust and debris, especially in the complex shaft environment, the continuous accumulation of impurities will aggravate the bearing wear and disturb the magnetic field distribution, and reduce the performance of permanent magnet, wherein, the traction sheave as the key connecting component of the steel cable and the motor becomes the "disaster area" of impurity invasion. Although the sealing cover is adopted in the prior art to protect the traction sheave, the traditional sealing cover only relies on static physical barrier and is difficult to resist the penetration of impurities in dynamic environment - the airflow generated by the reciprocating motion of the steel cable during the operation of the elevator is easy to carry impurities around the sealing gap, and the oil stains and wear particles attached to the surface of the steel cable will be transferred to the traction sheave with contact, further damaging the sealing effect. The continuous accumulation of impurities not only shortens the maintenance cycle of the traction machine, but also may cause safety hazards such as brake failure and rotor jam, and a protection scheme considering sealing and dynamic cleaning is urgently needed.

[0003] Therefore, it is very necessary to invent an outer rotor permanent magnet synchronous traction machine. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems, the utility model provides an outer rotor permanent magnet synchronous traction machine, which comprises an outer rotor permanent magnet traction machine body, a brake, a traction sheave, a mounting disc, an isolation cover, a cover, a shunt box, a nozzle seat, an airflow nozzle, a communication pipe, a gas pump and an inlet and outlet, the outer rotor permanent magnet traction machine body is provided with the brake, and the traction sheave and the mounting disc are installed; the isolation cover integrally arranged on the mounting disc is fixedly installed with the cover through fasteners; two inlets and outlets are formed in the isolation cover, and two shunt boxes and four nozzle seats are fixedly installed on the isolation cover, a plurality of airflow nozzles are arranged on each nozzle seat, each shunt box is connected with two corresponding nozzle seats through a communication pipe, and a gas pump is installed on each shunt box.

[0005] Preferably, the traction sheave installed on the outer rotor permanent magnet traction machine body is wrapped in the cover and the isolation cover, and the isolation cover and the shell of the outer rotor permanent magnet traction machine body are integrally arranged together through the mounting disc fixedly installed by fasteners.

[0006] Preferably, two corresponding inlets and outlets are formed in the isolation cover, the inlets and outlets allow the traction steel cable to pass through, and the two shunt boxes are fixedly installed on the upper and lower parts of the outside of the isolation cover.

[0007] Preferably, each of the distribution boxes is connected with two corresponding nozzle bases through two arc-shaped communication pipes, the airflow generated by the air pump enters the distribution boxes, is transported to the nozzle bases through the communication pipes, and is sprayed out through the airflow nozzles arranged transversely on the nozzle bases.

[0008] Preferably, four of the nozzle bases are arranged around two of the inlets and outlets, and two corresponding nozzle bases are arranged on the upper side and the lower side of each of the inlets and outlets.

[0009] Preferably, the two corresponding nozzle bases around the inlet and outlet do not interfere with the conveying movement of the traction cable, the airflow nozzles arranged on the corresponding nozzle bases spray the air beams in a cross manner, and the air beams sprayed by the airflow nozzles can act on the surface of the traction cable.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model discloses a double-wrapping structure of the isolation cover and the cover, and the tight connection of the fastener forms the full-closed space around the traction wheel, and compared with the traditional sealing cover, the protection level is improved obviously, and the invasion of external impurities into the inside of the traction machine through the gap is effectively blocked.

[0012] The utility model discloses the air pump drive airflow through distribution box, communication pipe to nozzle base, and the directional jet of cross -arranged airflow nozzle can remove the impurities adhered to the surface of the steel cable in real time when the steel cable enters and exits the inlet and outlet, and the risk that the impurities enter the traction wheel area with the steel cable is reduced from the source.

[0013] The utility model discloses that the nozzle base is arranged around the inlet and outlet and does not interfere with the movement of the steel cable, and the cross air beam design ensures that the circumferential surface of the steel cable can be cleaned, especially for the key path before the contact of the steel cable and the traction wheel, and the impurity deposition probability is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic diagram of the utility model.

[0015] Figure 2 It is the uninstalled structure schematic diagram of the cover of the utility model.

[0016] Figure 3 It is the structure schematic diagram of the isolation cover and the surrounding of the utility model.

[0017] In the drawing:

[0018] The outer rotor permanent magnet traction machine main body 1, the brake 2, the traction wheel 3, the mounting disc 4, the isolation cover 5, the cover 6, the distribution box 7, the nozzle base 8, the airflow nozzle 9, the communication pipe 10, the air pump 11, the inlet and outlet 12. DETAILED DESCRIPTION

[0019] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0020] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] As shown in the accompanying Figure 1 to the accompanying Figure 3 As shown:

[0022] The utility model provides a kind of outer rotor permanent magnet synchronous traction machine, including outer rotor permanent magnet traction machine main body 1, brake 2, traction wheel 3, mounting disc 4, insulating cover 5, cover 6, shunt box 7, nozzle seat 8, airflow nozzle 9, communication pipe 10, air pump 11 and inlet and outlet 12, brake 2 is installed on the outer rotor permanent magnet traction machine main body 1, and the traction wheel 3 and mounting disc 4 are installed;The insulating cover 5 integrally arranged on the mounting disc 4 is fixedly installed with cover 6 by fastener;Two inlets and outlets 12 are formed in the insulating cover 5, and two shunt boxes 7 and four nozzle seats 8 are fixedly installed on the insulating cover 5, a plurality of airflow nozzles 9 are provided on each nozzle seat 8, each shunt box 7 is communicated with two corresponding nozzle seats 8 by communication pipe 10, and air pump 11 is installed on each shunt box 7.

[0023] Further, the outer rotor permanent magnet traction machine body 1 adopts a high-strength aluminum alloy shell, and the permanent magnet and the stator assembly are integrated inside. The traction wheel 3 is made of nodular cast iron, which is sleeved on the main shaft through double-row angular contact ball bearings, and the outer circumferential surface is quenched to enhance wear resistance. The cover 6 and the isolation cover 5 are both stamped from stainless steel plates to form a closed protective space. The mounting disc 4 is made of steel plate and is fastened to the end face of the outer rotor permanent magnet traction machine body 1 shell with 304 stainless steel bolts.

[0024] Further, the arc-shaped side wall of the isolation cover 5 is provided with an elliptical or rectangular inlet and outlet 12 by laser cutting process, and the inner diameter is larger than the diameter of the traction cable to avoid scratching, and the edge is chamfered. The distribution box 7 is made of die-cast aluminum alloy and has a rectangular structure, and is connected to the embedded nuts on the top and bottom of the isolation cover 5 through L-shaped supports. The surface of the support is treated by anodic oxidation, and a buffer gasket is installed between the support and the isolation cover 5 to reduce vibration transmission. Each distribution box 7 is provided with a quick plug connector at the air inlet end, which is convenient for quick connection with the hose of the air pump 11.

[0025] Further, the communication pipe 10 is made of food-grade silicone material, the outer layer is woven with stainless steel wire to enhance the pressure resistance, and the two ends are fastened with the side outlet of the distribution box 7 and the air inlet of the nozzle seat 8 through a clamp. The nozzle seat 8 is injection molded, and the inside is designed with a Y-shaped distribution channel. The eight airflow nozzles 9 distributed horizontally adopt a conical neck structure and are made of ceramic material to improve erosion resistance. The jet angle of the airflow nozzle 9 is optimized by CFD simulation, and the angle between the steel cable running direction and the airflow nozzle 9 is 30°, which can ensure that a uniform air curtain covering the surface of the steel cable is formed under the condition of 0.4 MPa air supply pressure.

[0026] Further, the nozzle seat 8 adopts a symmetrical layout and is slidably connected with the inner wall of the isolation cover 5 through dovetail groove guide rails, and can be adjusted by ±5 mm along the radial direction of the steel cable to adapt to steel cables of different diameters. Each nozzle seat 8 is provided with a positioning pin at the bottom, which is inserted into the pre-designed positioning hole of the isolation cover 5 and locked with an M6 internal hexagonal screw. The distance between adjacent nozzle seats 8 is precisely calculated to ensure that the overlapping area of the intersecting air beams on the surface of the steel cable is formed, avoiding the cleaning blind area. The minimum distance between the nozzle seat 8 on both sides of the inlet and outlet 12 and the steel cable is 15 mm, which realizes efficient blowing without contacting the steel cable.

[0027] Further, the oppositely arranged nozzle seats 8 are designed with staggered structure, and the axes of the air flow nozzles 9 are arranged in a space intersecting manner to form a rhombic blowing area. The installation angle of the nozzle seat 8 is adjusted by ±10° deflection adjustment of the adjustable support to ensure that the air beam always vertically impacts the surface of the steel cable. A detachable filter screen is arranged at the outlet of each air flow nozzle 9 to prevent airway blockage. The filter screen is made of 316L stainless steel with a pore size of 0.1mm. The air pump 11 is equipped with a pressure sensor, which can automatically adjust the air supply pressure according to the running speed of the steel cable. Under the running condition of 2m / s, the blowing force of the air beam on the surface of the steel cable is stably maintained at 0.2N / cm 2 , effectively stripping the attached impurities without damaging the galvanized layer of the steel cable.

[0028] The working principle is as follows: the outer rotor permanent magnet traction machine main body 1 is the core power source of the whole device. The integrated permanent magnet in the main body interacts with the stator assembly. Based on the principle of permanent magnet synchronous motor, the three-phase alternating current on the stator generates a rotating magnetic field, which interacts with the fixed magnetic field generated by the permanent magnet on the rotor, so that the outer rotor drives the traction wheel 3 to rotate, thereby driving the traction steel cable of the elevator to move and realizing the lifting of the elevator. The brake 2 brakes the traction machine when needed to ensure the safety of the elevator operation.

[0029] The isolation cover 5 integrally arranged on the mounting disc 4 and the cover 6 fixedly installed by fasteners jointly form a closed protective space, which wraps the traction wheel 3. This protective space can effectively block most of the impurities and debris from directly entering the inside of the traction machine, especially preventing the floating or splashing of impurities from the elevator shaft and other environments from contacting the key components of the traction wheel 3 and the outer rotor permanent magnet traction machine main body 1.

[0030] The air pump 11 starts to work and generates air flow with a certain pressure. The pressure sensor equipped with the air pump 11 can automatically adjust the air supply pressure according to the running speed of the traction steel cable to ensure good cleaning effect under different working conditions. For example, under the running condition of 2m / s, the blowing force of the air beam on the surface of the steel cable can be stably maintained at 0.2N / cm 2 .

[0031] The air flow generated by the air pump 11 enters the shunt box 7. The shunt box 7 serves as an air flow distribution device, and the air flow is delivered to the corresponding nozzle seat 8 through two arc-shaped communication pipes 10. The communication pipe 10 is made of food-grade silicone material and has an outer layer of stainless steel wire for enhanced pressure resistance, which can ensure stable and efficient transmission of air flow.

[0032] After the air flow reaches the nozzle seat 8, it is evenly distributed to the 8 air flow nozzles 9 distributed horizontally through the Y-shaped shunt channel designed inside. The air flow nozzles 9 adopt a conical neck structure and are made of ceramic material to improve the erosion resistance, and the jet angle is optimized through CFD simulation and is 30° with the running direction of the steel cable. The oppositely arranged nozzle seats 8 are designed with staggered structure, the axes of the air flow nozzles 9 are arranged in space intersection, forming a rhombic blowing area. And the installation angle of the nozzle seat 8 can be adjusted by ±10° deflection adjustment through the adjustable support, ensuring that the air beam always vertically impacts the surface of the steel cable. After the air beam is sprayed from the air flow nozzles 9, it acts on the surface of the traction steel cable passing through the inlet and outlet 12, blows away the dust, oil stains, wear particles and other impurities attached to the surface of the steel cable, and reduces the risk of impurities entering the traction sheave 3 area with the steel cable from the source. At the same time, the layout of the nozzle seats 8 around the inlet and outlet 12 is carefully designed, which can not only ensure the effective blowing of the air beam to the steel cable, but also will not interfere with the normal conveying movement of the traction steel cable.

[0033] The technical scheme of the utility model, or the technical scheme of the utility model inspired by the person skilled in the art, designs similar technical scheme, and achieves the above technical effect, which falls within the protection scope of the utility model.

Claims

1. An external rotor permanent magnet synchronous traction machine, characterized by, The utility model provides an outer rotor permanent magnet traction machine, which comprises an outer rotor permanent magnet traction machine body (1), a brake (2), a traction wheel (3), a mounting disc (4), an isolation cover (5), a cover (6), a shunt box (7), a nozzle seat (8), an airflow nozzle (9), a communication pipe (10), an air pump (11) and an inlet and outlet (12), the brake (2) is installed on the outer rotor permanent magnet traction machine body (1), and the traction wheel (3) and the mounting disc (4) are installed; the cover (6) is fixedly installed on the integral isolation cover (5) of the mounting disc (4) through fasteners; two inlet and outlet (12) are formed in the isolation cover (5), two shunt boxes (7) and four nozzle seats (8) are fixedly installed on the isolation cover (5), a plurality of airflow nozzles (9) are arranged on each nozzle seat (8), each shunt box (7) is communicated with two corresponding nozzle seats (8) through a communication pipe (10), and an air pump (11) is installed on each shunt box (7).

2. An external rotor permanent magnet synchronous traction machine as claimed in claim 1, characterized in that: The traction wheel (3) installed on the outer rotor permanent magnet traction machine body (1) is wrapped in the cover (6) and the isolation cover (5), the isolation cover (5) and the shell of the outer rotor permanent magnet traction machine body (1) are integrally arranged together through the mounting disc (4) fixedly installed by fasteners.

3. An external rotor permanent magnet synchronous traction machine as claimed in claim 2, characterized in that: Two corresponding inlet and outlet (12) are formed in the isolation cover (5), the inlet and outlet (12) allow the traction cable to pass through, and two shunt boxes (7) are fixedly installed above and below the outside of the isolation cover (5) respectively.

4. An external rotor permanent magnet synchronous traction machine as claimed in claim 3, characterized in that: Each shunt box (7) is connected with two corresponding nozzle seats (8) through two arc-shaped communication pipes (10), airflow generated by the air pump (11) enters the shunt box (7), is conveyed to the nozzle seat (8) through the communication pipe (10) and is sprayed out through the airflow nozzle (9) arranged transversely on the nozzle seat (8).

5. An external rotor permanent magnet synchronous traction machine as claimed in claim 4, characterized in that: Four nozzle seats (8) are arranged around two inlet and outlet (12) respectively, and two corresponding nozzle seats (8) are arranged on the upper side and the lower side of each inlet and outlet (12).

6. An external rotor permanent magnet synchronous traction machine as claimed in claim 5, characterized in that: The two corresponding nozzle seats (8) around the inlet and outlet (12) do not interfere with the conveying movement of the traction cable, the airflow nozzles (9) arranged on the corresponding nozzle seats (8) spray the air beams in a cross manner, and the air beams sprayed by the airflow nozzles (9) can act on the surface of the traction cable.

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