CN111206841A

CN111206841A - Bilateral short primary linear motor direct-drive type subway door machine

Info

Publication number: CN111206841A
Application number: CN202010025346.2A
Authority: CN
Inventors: 姜文; 黄文新; 王思齐; 袁一珉; 林晓刚; 赵勇; 朱山峰
Original assignee: Nanjing University of Aeronautics and Astronautics
Current assignee: Nanjing University of Aeronautics and Astronautics
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-05-29

Abstract

The invention discloses a double-sided short-primary linear motor direct-drive type subway door crane, and designs a bilateral short-primary linear motor. This new linear motor topology installs both the excitation source and the armature winding on the primary stator, and through the The control of the primary excitation and armature current can make the two long secondary movers perform synchronous and anisotropic motions, so as to realize the goal of driving two subway doors with a bilateral primary excitation linear motor without adding a transmission mechanism. The invention simplifies the system structure and has the advantages of low cost, high efficiency and high reliability.

Description

Bilateral short primary linear motor direct-drive type subway door machine

Technical Field

The invention belongs to the technical field of subway door machines, and particularly relates to a linear motor direct-drive type subway door machine.

Background

With the deepening of the modernization degree of cities and the increase of urban population, subways become an indispensable part of urban daily public transportation gradually, and are main lines and main arteries for urban passenger flow transportation. Compared with other urban daily traffic modes, the subway has the advantages of high speed, punctuality, safety, energy conservation, pollution reduction, large transportation volume and the like. In order to ensure the accurate point and safe operation of the subway, the driving and controlling of the subway door becomes an important ring.

The motor and the transmission mechanism are important components for driving and controlling the subway door at present. The existing metro door driving mostly adopts a rotating motor, and is matched with a transmission mechanism mainly comprising a constant lead screw, so that the rotating motion of the motor is converted into the linear motion of the metro door through the transmission of the lead screw, and the opening and closing of the metro door are driven. Because a primary transmission mechanism exists between the two parts, the system is complex, the dynamic performance is poor, the reliability is low, the maintenance cost is increased, and the noise is large. The linear motor has the characteristic of reciprocating linear motion, and an intermediate transmission mechanism is not required to be added, so that the linear motor has the advantages of simple structure, good dynamic performance, high efficiency and the like.

The linear motor is roughly classified into a permanent magnet type linear motor, a linear induction motor, and a reluctance type linear motor. Although the permanent magnet type linear motor has the advantages of simple structure, high thrust density and high efficiency, the manufacturing cost is high, and the permanent magnet is easy to adsorb impurities and difficult to clean, so that the application occasions of the permanent magnet type linear motor are limited; the linear induction motor has simple structure and low cost, but the power factor and the efficiency are low, so the application of the linear induction motor in the subway door driving is limited; the reluctance type linear motor can be divided into a permanent magnet type, an electric excitation type and a mixed excitation type, wherein the permanent magnet type and the mixed excitation type have the problem that a permanent magnet is easy to absorb impurities, the electric excitation type can be divided into a primary stator electric excitation type and a secondary rotor electric excitation type, and the secondary rotor electric excitation type has more complex winding installation because the secondary rotor needs to reciprocate; the secondary rotor of the primary stator electric excitation type reluctance linear motor is only composed of a magnetic conductive iron core, so that the primary stator electric excitation type reluctance linear motor has the advantages of simple structure, low cost and high reliability, but the efficiency of the primary stator electric excitation type reluctance linear motor is lower than that of a permanent magnet type linear motor due to the inherent excitation loss problem of the electric excitation type reluctance linear motor.

The existing subway door drive adopts two schemes of linear motor drive, one scheme is that a single-side linear motor is adopted to drive two subway doors, so that a one-stage or multi-stage transmission mechanism is required to be added, the complexity of the system is increased, and the reliability of the system is reduced; the other is that two unilateral linear motors are respectively adopted to drive two metro doors, so that the complexity and the cost of the system are increased, and the synchronous control of the two motors has certain difficulty, so that the reliability of the system is reduced.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides a double-side short primary linear motor direct-drive type subway door machine which is simple in structure, low in cost, high in efficiency and high in reliability.

In order to achieve the technical purpose, the technical scheme of the invention is as follows:

a subway gantry crane directly driven by bilateral short primary linear motors comprises bilateral short primary linear motors, a sliding rail shell, primary stator fixing rods and secondary rotor fixing rods, wherein the secondary rotor fixing rods are positioned on two sides in the sliding rail shell; two linear slide rails are respectively arranged on two sides of the interior of the slide rail shell, the four linear slide rails are parallel to each other, a limit stop is arranged at the head end and the tail end of each linear slide rail, a group of aluminum slide blocks are respectively arranged on two sides of the interior of the slide rail shell, two groups of slide rail rollers are arranged on each group of aluminum slide blocks, and each group of slide rail rollers are tightly attached to and matched with the linear slide rails on the same side, so that the two groups of aluminum slide blocks can move along the linear slide; the bilateral short primary linear motor comprises a bilateral short primary stator and two long secondary rotors positioned on two sides of the bilateral short primary stator, wherein the bilateral short primary stator comprises a magnetic conductive iron core, an excitation winding and an armature winding; the two groups of aluminum sliding blocks are correspondingly connected with a left subway door and a right subway door according to a left door hanging rod and a right door hanging rod; synchronous control is exerted on two sides of the two short primary stators, and the two long secondary rotors move under the action of electromagnetic force, so that the aluminum sliding block is driven to move along a linear track, and synchronous anisotropic motion of the left subway door and the right subway door is realized through the left door hanging rod and the right door hanging rod.

Furthermore, two groups of supporting rollers are installed on the primary stator fixing rod, the two groups of supporting rollers are located on two sides of the bilateral short primary stator respectively, and the two groups of aluminum sliding blocks are attached to the supporting rollers respectively to move, so that the size of an air gap between the two long secondary rotors and the bilateral short primary stator is guaranteed to be unchanged in the moving process.

Further, each set of support rollers includes at least 4 rollers.

Furthermore, the two long secondary rotors are respectively a magnetic conductive iron core with a plurality of parallel grooves.

Further, each set of slide rail rollers at least comprises 4 rollers.

Further, the secondary rotor fixing rod on each side at least comprises two fixing rods.

Adopt the beneficial effect that above-mentioned technical scheme brought:

(1) the invention uses one bilateral short primary linear motor to directly drive two metro doors, so that the system has the advantages of simple structure, convenient use, high efficiency, good dynamic performance, high reliability and the like;

(2) the linear motor provided by the invention adopts stator excitation, so that the motor has a simple structure, is easy to produce and has low cost;

(3) the invention does not integrate the primary motor with the subway door rail, thereby simplifying the design of the subway door rail and reducing the manufacturing cost of the linear motor direct-drive subway door machine.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of a double-sided short primary linear motor according to the present invention;

FIG. 3 is a three-dimensional schematic of the present invention;

FIG. 4 is a three-dimensional schematic view of a slide rail housing according to the present invention;

FIG. 5 is a schematic view of the assembly of the aluminum slider of the present invention;

description of reference numerals: 1: a primary stator fixing bar; 2: a slide rail housing; 3. 8, 11, 16: a slide rail roller; 4. 15: supporting the rollers; 5. 13: a secondary rotor fixing rod; 6. 14: a long secondary mover; 7. 12: an aluminum slider; 9. a right door hanging bar; 10. an armature winding; 17. a left door hanging rod; 18. an excitation winding; 19. a magnetically permeable iron core; 20. 21, 22, 23: a linear slide rail; 24. 25, 26, 27: and a limit stop.

Detailed Description

The technical scheme of the invention is explained in detail in the following with the accompanying drawings.

The invention designs a bilateral short primary linear motor direct-drive type subway gantry crane which comprises a bilateral short primary linear motor, a sliding rail shell 2, a primary stator fixing rod 1 and secondary

rotor fixing rods

5 and 13 positioned on two sides in the sliding rail shell as shown in figures 1-5. Two

linear slide rails

20, 21, 22 and 23 are respectively installed on two sides of the interior of the slide rail shell, the four linear slide rails are parallel to each other, limit stops 24, 25, 26 and 27 are installed at the head end and the tail end of each linear slide rail, a set of

aluminum sliding blocks

7 and 12 are respectively arranged on two sides of the interior of the slide rail shell, two sets of

slide rail rollers

3, 8, 11 and 16 are installed on each set of aluminum sliding blocks, each set of slide rail rollers are tightly attached to and matched with the linear slide rails on the same side, and it is guaranteed that the two sets of aluminum sliding blocks can move along. The bilateral short primary linear motor comprises a bilateral short primary stator and two long

secondary rotors

6 and 14 positioned on two sides of the bilateral short primary stator, the bilateral short primary stator comprises a magnetic conduction iron core 19, an excitation winding 18 and an armature winding 10, a primary stator fixing rod 1 is inserted into a sliding rail shell, the magnetic conduction iron core is fixed on a primary stator fixing rod, the excitation winding and the armature winding are wound on the magnetic conduction iron core, air gaps (the size of the air gaps is extremely small) exist between the two long secondary rotors and the bilateral short primary stator respectively, and the two long secondary rotors are fixedly connected with aluminum sliders on the same side through secondary rotor fixing rods on the same side respectively. The two groups of aluminum sliding blocks are correspondingly connected with a left subway door and a right subway door according to a left door hanging rod 17 and a right door hanging rod 9. Synchronous control is exerted on two sides of the two short primary stators, and the two long secondary rotors move under the action of electromagnetic force, so that the aluminum sliding block is driven to move along a linear track, and synchronous anisotropic motion of the left subway door and the right subway door is realized through the left door hanging rod and the right door hanging rod.

In this embodiment, preferably, two sets of support rollers 4 and 15 are mounted on the fixing rod of the primary stator, the two sets of support rollers are respectively located at two sides of the bilateral short primary stator, and the two sets of aluminum sliders respectively cling to the support rollers to move, so as to ensure that the size of an air gap between the two long secondary movers and the bilateral short primary stator is not changed in the moving process.

In this embodiment, each set of support rollers preferably includes at least 4 rollers.

In this embodiment, preferably, the two long secondary rotors are respectively a magnetic core having a plurality of parallel grooves.

In this embodiment, each set of rail rollers preferably includes at least 4 rollers.

In this embodiment, it is preferable that the secondary mover fixing bars of each side include at least two fixing bars.

The embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the scope of the present invention.

Claims

1. A double-sided short primary linear motor direct-drive type subway door operator is characterized in that: comprising a bilateral short primary linear motor, a sliding rail housing, a primary stator fixing rod and a secondary mover fixing rod located on both sides inside the sliding rail housing ; Two linear slide rails are installed on both sides of the inside of the slide rail housing, the four linear slide rails are parallel to each other, and limit stops are installed at the head and tail ends of each linear slide rail, and the two sides inside the slide rail housing are installed. Set up a set of aluminum sliders respectively, and install two sets of slide rail rollers on each set of aluminum slide blocks, and each set of slide rail rollers is close to and matched with the linear slide rail on the same side to ensure that the two sets of aluminum slide blocks can follow a straight line. The sliding rail moves; the bilateral short primary linear motor includes a bilateral short primary stator and two long secondary movers located on both sides of the bilateral short primary stator, and the bilateral short primary stator includes a magnetic core, an excitation winding and an armature winding, the primary stator fixing rod is inserted into the inside of the sliding rail housing, the conductive core is fixed on the primary stator fixing rod, the field winding and the armature winding are wound on the conductive core, the two long secondary There are air gaps between the movers and the bilateral short primary stators, respectively, and the two long secondary movers are respectively fixedly connected to the aluminum sliders on the same side through the secondary mover fixing rods on the same side; the two groups of aluminum sliders are fixedly connected. The block corresponds to the left door hanging rod and the right door hanging rod, and the left door hanging rod and the right door hanging rod are correspondingly connected to the left subway door and the right subway door; The stage mover moves under the action of electromagnetic force, thereby driving the aluminum slider to move along the linear track, and then realizes the synchronous and anisotropic movement of the left and right subway doors through the left and right door hanging rods.

2. The double-sided short-primary linear motor direct-drive subway gantry crane of claim 1, wherein two sets of support rollers are installed on the primary stator fixing rod, and the two sets of support rollers are respectively located on the sides of the bilateral short primary stator. On both sides, the two groups of aluminum sliders move in close contact with the supporting rollers respectively, so as to ensure that the size of the air gap between the two long secondary movers and the bilateral short primary stators remains unchanged during the movement.

3. The double-sided short-primary linear motor direct-drive subway door operator according to claim 2, wherein each group of supporting rollers comprises at least 4 rollers.

4 . The double-sided short primary linear motor direct-drive subway door operator according to claim 1 , wherein the two long secondary movers are respectively a conductive magnet core with a plurality of parallel grooves. 5 .

5. The double-sided short-primary linear motor direct-drive subway door operator according to claim 1, wherein each group of sliding rail rollers comprises at least 4 rollers.

6 . The double-sided short-primary linear motor direct-drive subway door crane of claim 1 , wherein the secondary mover fixing rods on each side comprise at least two fixing rods. 7 .