CN105819303A - Self-adaption damping elevator well damping assembly - Google Patents

Abstract

The invention discloses an adaptive damping elevator shaft damping assembly, which includes a buffer plate, a magnetorheological damping device and a control system; The rotating magneto-rheological damper assembly independently supports the buffer plate, and each group of rotating magneto-rheological damper assemblies includes a lifting arm, a rotating shaft and at least two rotating magneto-rheological dampers that are respectively driven and arranged at both ends of the rotating shaft; The control system includes a drop parameter detection unit, a power supply unit, and a central processing unit; the central processing unit adjusts the damping force of each lifting arm in real time according to the drop parameters detected by the drop parameter detection unit, so that the inclined buffer plate is horizontal to ensure a larger and more effective later stage. The damping force intervenes to achieve the smoothness of the downward buffer, which can realize the common use of high-speed and low-speed elevators and improve the safety performance of the elevator.

Description

Adaptive damping elevator shaft damping assembly

technical field

The invention relates to the field of an elevator shaft, in particular to an adaptive damping elevator shaft damping assembly.

Background technique

As a vertical elevator powered by a motor, the car elevator drags the box up and down through mechanical traction. In order to ensure its convenient operation and manufacturing cost, the motor is usually used to drive the rope to drag the car vertically, and the drive structure is relatively It is also relatively complicated. Due to problems such as installation process quality, service life and use environment, elevators are prone to serious safety and quality problems. Although quality inspection personnel will conduct regular safety inspections, there are still a large number of major elevator accidents. Falling under unconstrained or partially constrained conditions, and then, a buffer plate is set at the bottom of the elevator shaft to buffer the fast-falling car, so as to minimize the damage of the car suddenly touching the bottom; in the prior art, usually through Install springs or/and damping devices on the buffer plate for buffering. When the car touches the bottom, the gravitational potential energy of the car is converted into the elastic potential energy of the spring and the internal energy of the damping fluid, and the buffer plate is vertically guided by the guide device However, when the car is falling, the car usually falls in an inclined state. When it is engaged with the buffer plate, the buffer plate is subjected to a large moment, which makes the vertical guide device prone to greater friction, causing the buffer to lock Or the reverse friction and recoil force is too large, which is not conducive to the subsequent intervention of springs and damping parts; at the same time, because the buffer structure tends to generate a lot of heat during the punching process, the buffer structure with a large footprint is good for heat dissipation in a relatively small space , and the accuracy of controlling the damping force is low, which is not conducive to the smoothness of the car damping downward.

Therefore, it is necessary to improve the existing elevator shaft, and the damping force can be adjusted before and during the buffering process when the car abnormally bottoms out, so as to realize the smoothness of the downward buffering according to the falling situation of the inclined car , can realize the common use of high-speed and low-speed elevators, and improve the safety performance of elevators.

Contents of the invention

In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide an adaptive damping elevator shaft damping assembly, and the damping force can be adaptively adjusted during the buffering process before and when the car bottoms out abnormally. , according to the falling condition of the inclined car, it can realize the smoothness of the downward buffer, and can realize the common use of high-speed and low-speed elevators, and improve the safety performance of the elevator.

The self-adaptive damping elevator shaft damping assembly of the present invention includes a buffer plate for combining with the bottom of the car and providing a buffer force when the car falls, a magneto-rheological damping device for providing an upward damping force for the buffer plate, and It is a control system for controlling the damping force output of the magnetorheological damping device; the magnetorheological damping device includes at least four groups of rotating magnetorheological dampers arranged along the circumference of the elevator shaft, distributed on the bottom surface of the buffer plate and independently supporting the buffer plate Assemblies, each set of rotating magneto-rheological damper assemblies include a lifting arm, a rotating shaft, and at least two rotating magneto-rheological dampers respectively driven and arranged at both ends of the rotating shaft, one end of the lifting arm is fixedly connected to the rotating shaft along the circumferential direction , the other end is supported on the bottom surface of the buffer plate and is slidably matched with the buffer plate in a single degree of freedom; the control system includes a drop parameter detection unit for detecting the drop parameters of the car, and a power supply for supplying power to the electromagnetic coil of the magneto-rheological damping device unit and a central processing unit for receiving the data signal of the drop parameter detection unit and sending a power supply command to the power supply unit according to the signal.

Further, a single free end sliding fit is realized between the lifting arm and the bottom of the buffer plate through a roller assembly, and the roller assembly includes a roller that rolls and fits with the bottom surface of the buffer plate and a roller mounting seat plate for installing the roller. The lifting arm is hinged to the bottom surface of the roller installation seat plate with a single degree of freedom; the bottom surface of the buffer plate is provided with a limit wheel groove for limiting the roller.

Further, the magneto-rheological damping device also includes at least four cylindrical magneto-rheological dampers that output damping force along its own axial direction; Correspondingly arranged and both include a cylinder body, an electromagnetic piston assembly arranged in the cylinder body, and a piston rod fixedly connected with the electromagnetic piston assembly for outputting damping force, the outer bottom of the cylinder body is hinged to the bottom surface of the elevator shaft, The outer end and the lifting arm are coaxially hinged on the bottom surface of the roller mounting seat plate.

Further, the electromagnetic piston assembly is arranged in the cylinder and separates the cylinder from the first chamber and the second chamber, the first chamber and the second chamber are both provided with magnetorheological fluid, and the electromagnetic piston assembly includes A piston head and an excitation coil, the outer surface of the piston head is provided with a helical damping channel for the magnetorheological fluid to flow between the first chamber and the second chamber, and the excitation coil is arranged in the helical damping channel radially outer side.

Further, the piston head is a cylindrical structure, the helical damping channel is a single-line helical structure, a double-line helical structure or a multi-line helical structure, and the cross-sectional shape of the helical damping channel is rectangular; the electromagnetic piston assembly is also It includes a front end cover and a rear end cover respectively arranged at both axial ends of the piston head and made of magnetically permeable material. The front end cover is provided with a first communication hole for connecting the first chamber and the spiral damping channel. The rear end cover is provided with a second communicating hole for communicating the second chamber and the spiral damping passage.

Further, first seals are provided between the front end cover and the inner wall of the cylinder and between the rear end cover and the inner wall of the cylinder; The coil installation groove of the coil, an inner partition made of non-magnetic material is arranged between the coil installation groove and the piston head, and an inner partition made of magnetic material is arranged between the coil installation groove and the inner wall of the cylinder. the outer clapboard.

Further, the cylindrical magneto-rheological damper also includes a floating piston, the floating piston is arranged in the second chamber and divides the second chamber into a third chamber and a fourth chamber, and the first chamber The chamber communicates with the third chamber and is filled with magnetorheological fluid, and the fourth chamber is filled with compressed inert gas.

Further, the lifting arm is composed of a horizontal arm and a bending arm formed by extending axially from one end of the horizontal arm and bending upwards, the other end of the horizontal arm is fixedly connected to the rotating shaft along the circumferential direction, and the upper end of the bending arm is connected to the The bottom surface of the roller mounting seat plate is hinged.

Further, a cylinder for pushing the horizontal arm back is provided below the horizontal arm.

Further, the falling parameter detection unit includes:

The falling speed detection sensor is used to detect the falling speed parameter of the car;

The elevator box gravity parameter sensor is used to detect the real-time load weight parameters of the elevator box;

The falling contact pressure detection sensor is used to detect the pressure parameters on the buffer plate when the car is in contact with the buffer plate when it falls;

The deflection angle detection sensor is used to detect the deflection angle parameters of each lifting arm when lifting.

The beneficial effects of the present invention are: the self-adaptive damping elevator shaft damping assembly disclosed by the present invention, by setting the rotating magneto-rheological damper assembly at the bottom of the buffer plate, through the lifting effect of the lifting arm on the buffer plate, buffering During the downward process of the plate, the lifting arm provides an upward buffering damping force to the buffer plate due to the damping effect of the rotating magneto-rheological damper, and the central processing unit adjusts the lifting arm in real time according to the falling parameters detected by the falling parameter detection unit. The damping force makes the inclined buffer plate horizontal, ensuring a larger and effective damping force intervention in the later stage, realizing the smoothness of the down buffer, realizing the common use of high-speed and low-speed elevators, and improving the safety performance of the elevator.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of cylindrical magneto-rheological damper in the present invention;

Fig. 3 is a structural schematic diagram of the lifting arm and the rotating magneto-rheological damper in the present invention.

detailed description

Fig. 1 is a structural schematic diagram of the present invention, Fig. 2 is a structural schematic diagram of a cylindrical magnetorheological damper in the present invention, and Fig. 3 is a structural schematic diagram of a lifting arm and a rotating magnetorheological damper in the present invention, as shown in the figure , the adaptive damping elevator shaft damping assembly in this embodiment includes a buffer plate 1 for combining with the bottom of the car and providing a buffer force when the car is falling, and a magnetic flow for providing an upward damping force for the buffer plate 1 A variable damping device and a control system for controlling the output of the damping force of the magnetorheological damping device; the magnetorheological damping device is fixed on the bottom foundation 2 of the elevator shaft, and the magnetorheological damping device at least includes The four sets of rotating magnetorheological damper components distributed on the bottom surface of the buffer plate 1 and independently supporting the buffer plate 1, the foundation 2 at the bottom of the elevator shaft forms a rectangular cavity, and each side wall foundation 2 of the rectangular cavity is fixed with a rotating magnetorheological damper assembly. `Damper assembly, each set of rotary magneto-rheological damper assemblies includes a lifting arm 3, a rotating shaft 4, and at least two rotating magneto-rheological dampers 5 that are respectively driven and arranged at both ends of the rotating shaft 4, and the rotating magneto-rheological damper 5 It is fixed in the foundation 2 and rotates against the rotation shaft 4 to form rotation damping. One end of the lifting arm 3 is fixedly connected with the rotation shaft 4 along the circumferential direction, and the other end is supported on the bottom surface of the buffer plate 1 and is slidably matched with the buffer plate 1 in a single degree of freedom. The rotary shaft 4 is damped by the rotating magneto-rheological damper 5, and then the rotation of the lifting arm 3 is damped, so as to provide an upward damping force to the buffer plate 1; the control system includes a drop parameter for detecting the drop parameter of the car The detection unit, the power supply unit for supplying power to the electromagnetic coil of the magneto-rheological damping device and the central processing unit 28 for receiving the data signal of the drop parameter detection unit and sending a power supply command to the power supply unit 29 according to the signal; The bottom of 1 is provided with a rotating magneto-rheological damper 5 assembly. Through the lifting effect of the lifting arm 3 on the buffer plate 1, when the buffer plate 1 is descending, the lifting arm 3 is damped by the rotating magneto-rheological damper 5. , provide an upward buffering damping force to the buffer plate 1, and the central processing unit 28 adjusts the damping force of each lifting arm 3 in real time according to the falling parameters detected by the falling parameter detection unit, so that the inclined buffering plate 1 is horizontal to ensure a larger and more effective later stage The damping force intervenes to realize the smoothness of the downward buffer, which can realize the common use of high-speed and low-speed elevators and improve the safety performance of the elevator.

In this embodiment, the single free end sliding fit is realized between the lifting arm 3 and the bottom of the buffer plate 1 through a roller assembly, and the roller assembly includes a roller 6 that rolls and fits with the bottom surface of the buffer plate 1 and a roller for installing the roller The seat plate 7 is installed, and the lifting arm 3 single-degree-of-freedom is hinged on the bottom surface of the roller mounting seat plate 7; the bottom surface of the buffer plate 1 is provided with a limit wheel groove for limiting the roller; through the setting of the roller assembly, ensure The rolling fit between the lifting arm 3 and the buffer plate 1 avoids locking or other bad friction between the lifting arm 3 and the buffer plate 1 , and ensures the downward flexibility of the buffer plate 1 .

In this embodiment, the magnetorheological damping device further includes at least four cylindrical magnetorheological dampers 8 that output damping force along its axial direction; each cylindrical magnetorheological damper 8 is connected with a single set of rotating magnetic The components of the rheological damper 5 are arranged correspondingly and each includes a cylinder body 9, an electromagnetic piston assembly disposed in the cylinder body 9, and a piston rod 10 fixedly connected with the electromagnetic piston assembly for outputting damping force. The bottom surface of the elevator shaft is hinged, and the outer end of the live race rod and the lifting arm 3 are coaxially hinged to the bottom surface of the roller mounting seat plate 7; The bottom of the well and the upper end of the cylindrical magneto-rheological damper 8 is inclined toward the side of the rotating magneto-rheological damper to ensure that the horizontal component force of the cylindrical magnetorheological damper 8 and the lifting arm 3 on the roller assembly is opposite, ensuring that the roller assembly Stability, the central unit controls the cylindrical magneto-rheological damper 8 and cooperates with the rotary magneto-rheological damper to exert an effective damping force on the buffer plate 1, and the structure is simple, the installation is convenient, and the installation space is large, which is beneficial to Heat dissipation, at the same time, the damping force is easy to control and the control precision is high, ensuring the smoothness of the buffer.

In this embodiment, the electromagnetic piston assembly is arranged in the cylinder 9 and the cylinder 9 separates the first chamber 11 and the second chamber 12, and the first chamber 11 and the second chamber 12 are both provided with magnetic flow The electromagnetic piston assembly includes a piston head 13 and an exciting coil 14, and the outer surface of the piston head 13 is provided with a helix for the magnetorheological fluid to flow between the first chamber 11 and the second chamber 12. Shaped damping channel 15, the excitation coil 14 is arranged on the radial outside of the spiral damping channel 15; the spiral damping channel 15 is set on the outer surface of the piston head 13, compared with the linear structure of the damping channel, the damping channel can be increased The effective length can expand the damping force output range, which can meet the buffering requirements under high-speed impact; the excitation coil 14 is arranged on the radially outer side of the spiral damping channel 15, which is conducive to the formation of the exciting coil 14 perpendicular to the direction of motion of the magnetorheological medium in the damping channel. Due to the action of the magnetic field, the cylinder body 9 of the working cylinder does not need to be used as a magnetic conductive part, which simplifies the processing technology.

In this embodiment, the piston head 13 is a cylindrical structure, the helical damping channel 15 is a single-line helical structure, a double-line helical structure or a multi-line helical structure, and the cross-sectional shape of the helical damping channel 15 is a rectangle; The structure is flexible and the applicability is strong. The multi-wire helical structure refers to the helical structure with more than three wires; the helical damping channel 15 can increase the Coulomb force of the yield fluid without increasing the viscous damping force, and can avoid the magnetorheological fluid. Partial silting prevents foaming, ensures the smooth flow of the magnetic circuit and the suspension stability of the magnetorheological medium. The helix angle of the spiral damping channel 15 can be determined according to actual needs. In this embodiment, when the helix angle is greater than 10 °, it can generate a larger torque around the axial direction, which is beneficial to prevent the magnetorheological fluid from settling. The electromagnetic piston assembly also includes a front end cover and a The rear end cover, the front end cover is provided with a first communicating hole for connecting the first chamber 11 and the spiral damping passage 15, and the rear end cover is provided with a first communication hole for communicating the second chamber 12 and the spiral damping passage 15; and the rear end cover or the front end cover is provided with a wire hole, and the wire of the exciting coil 14 communicates with the external power supply through the wire hole, and the structure is simple and compact.

In this embodiment, a first seal is provided between the front end cover 16 and the inner wall of the cylinder 9 and between the rear end cover 17 and the inner wall of the cylinder 9; the front end cover 16 and the rear end cover 17 is also provided with a coil installation groove 18 for installing the excitation coil 14, and an inner partition made of a non-magnetic material is arranged between the coil installation groove 18 and the piston head 13, and the coil installation groove 18 and the An outer partition made of a magnetically conductive material is provided between the inner walls of the cylinder 9; the seal is preferably an "O" type sealing ring; the non-magnetically conductive inner partition connects the exciting coil 14 and the spiral damping channel 15 The magnetorheological medium is isolated, and the magnetically conductive outer partition and the magnetically conductive front end cover 16 and rear end cover 17 cooperate to form a good magnetic circuit.

In this embodiment, the cylindrical magneto-rheological damper 8 further includes a floating piston 20, and the floating piston 20 is arranged in the second chamber 12 and divides the second chamber 12 into a third chamber and a fourth chamber. Chamber 19, the first chamber 11 communicates with the third chamber and is filled with magnetorheological fluid, and the fourth chamber 19 is filled with compressed inert gas; the floating piston 20 can improve the nonlinear output characteristics of the buffer device When the vibration changes suddenly, the pressure difference between the two sides of the floating piston 20 changes, causing the floating piston 20 to move relative to the working cylinder and absorb the energy generated by the vibration.

In this embodiment, the lifting arm 3 is composed of a horizontal arm and a bent arm 22 formed by extending axially from one end of the horizontal arm and bending upward. The other end of the horizontal arm 21 is fixedly connected with the rotating shaft 4 along the circumferential direction, so The upper end of the bending arm is hinged to the bottom surface of the roller mounting seat plate 7; the bending angle of the bending arm 22 is between 30°-90°, which ensures that the lifting arm 3 can increase the effective upward damping force on the buffer plate 1, which is beneficial to damping effective power output.

In this embodiment, the bottom of the horizontal arm 21 is provided with a cylinder 23 for pushing the horizontal arm 21 to reset; the cylinder 23 is controlled by the central processing unit 28, and when the car needs to be reset, the piston rod 10 of the cylinder 23 directly The horizontal arm 21 exerts an upward thrust, has a simple structure and is easy to operate.

In this embodiment, the falling parameter detection unit includes:

The falling speed detection sensor 24 is used to detect the falling speed parameter of the car, which is arranged in the elevator shaft, and existing speed sensors such as Hall element speed measurement can be used, and will not be repeated here;

The elevator box gravity parameter sensor 25 is used to detect the real-time load weight parameters of the elevator box, which can be arranged at the bottom of the elevator box or other load-bearing components;

The falling contact pressure detection sensor 26 is arranged on the upper surface of the buffer plate 1, and is used to detect the pressure parameters generated by the buffer plate 1 when the car is in contact with the buffer plate 1 when the car falls; the deflection angle detection sensor 27 is provided with the elevator On the side wall of the bottom, it is used to detect the deflection angle parameters of each lifting arm 3 when lifting; the cushioning inertia and correction can be obtained through the above elevator car body falling speed parameters, real-time load weight parameters and the deflection angle of lifting arms 3 According to the requirement of torque, adjust the magnitude of the current according to the requirement, and the adjustment can be carried out during the falling process of the elevator, and the real-time inertial parameters can be obtained according to the falling speed and the overall weight, so as to adjust the viscosity of the magnetorheological fluid in real time, which is targeted In actual use, when the elevator car body falls and contacts the magnetorheological damping body, it has a timely and accurate effect on the pressure parameters generated by the magnetorheological damping body, and the actual impact force can be accurately obtained, so that the above two The inertial parameters obtained by two parameters achieve the purpose of correction, and the pressure parameter and the obtained inertial force should be used as the larger one; due to real-time detection, different damping forces can be increased or adjusted in a targeted manner during the falling process, and the pressure parameter correction There will be no sudden change and impact force; the inertial parameters obtained above and the adjustment of the magnetorheological fluid viscosity according to the inertial parameters can be realized through simple calculations and procedures in the prior art, and will not be repeated here.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. a self-adaptive damping elevator damping assembly, it is characterised in that: be combined and provide the buffer board of cushion effect when including for car is fallen with cage bottom, for providing the magnetorheological damping device of upwards damping force for buffer board and for controlling the control system of magnetorheological damping device damping force output；Described magnetorheological damping device at least includes being distributed in buffer board bottom surface along four components that elevator is circumferentially disposed and independently lifting the rotary magneto-rheological damper assembly of buffer board, often group rotary magneto-rheological damper assembly all includes that lifting the transmission respectively of arm, rotating shaft and at least two is arranged at the rotary magneto-rheological damper at rotating shaft two ends, described one end lifting arm is circumferentially fixed with rotating shaft and is connected, and the other end is supported in buffer board bottom surface and is slidably matched with buffer board single-degree-of-freedom；Described control system includes the descent parameters detector unit for detecting car descent parameters, for for the power subsystem of the solenoid of magnetorheological damping device with for receiving the data signal of descent parameters detector unit and sending the CPU of power on command according to this signal to power subsystem.

Self-adaptive damping elevator the most according to claim 1 damping assembly, it is characterized in that: described in lift bottom arm and buffer board between realize single free end by roll wheel assembly and be slidably matched, described roll wheel assembly includes rolling the roller that coordinates with buffer board bottom surface and for installing the roller installation seat plate of roller, described in lift arm single-degree-of-freedom and be articulated with the bottom surface of roller installation seat plate；Described buffer board bottom surface is provided with for the spacing spacing race of pair roller.

Self-adaptive damping elevator the most according to claim 2 damping assembly, it is characterised in that: described magnetorheological damping device is also including that at least four axially exports the tubular MR damper of damping force along self；Each tubular MR damper and single group rotary magneto-rheological damper assembly be correspondingly arranged and all included cylinder, is arranged in cylinder electromagnetic piston assembly and fix the piston rod being connected to export damping force with electromagnetic piston assembly, described cylinder exterior bottom is hinged with shaft bottom, the bottom surface that be articulated with roller installation seat plate coaxial with lifting arm, outer end of described match bar of living.

Self-adaptive damping elevator the most according to claim 3 damping assembly, it is characterized in that: described electromagnetic piston assembly is located in cylinder and cylinder separates the first chamber and the second chamber, first chamber and the second chamber are provided with magnetic flow liquid, described electromagnetic piston assembly includes piston head and magnet exciting coil, the outer surface of described piston head is provided with the spiral type damp channel for flowing between the first chamber and the second chamber for magnetic flow liquid, and described magnet exciting coil is located at the radial outside of spiral type damp channel.

Self-adaptive damping elevator the most according to claim 4 damping assembly, it is characterized in that: described piston head is cylindrical structure, described spiral type damp channel is single-wire helix structure, bi-filar spiral configuration or multi-thread helical structure, and the cross sectional shape of described spiral type damp channel is rectangle；Described electromagnetic piston assembly also includes being respectively provided at the axial two ends of piston head the drive end bearing bracket being made up of permeability magnetic material and rear end cap, described drive end bearing bracket is provided with the first intercommunicating pore for connecting the first chamber and spiral type damp channel, and described rear end cap is provided with the second intercommunicating pore for connecting the second chamber and spiral type damp channel.

Self-adaptive damping elevator the most according to claim 5 damping assembly, it is characterised in that: it is equipped with the first sealing member between described drive end bearing bracket and the inwall of cylinder and between described rear end cap and the inwall of cylinder；The coil mounting groove for installing magnet exciting coil it is additionally provided with between described drive end bearing bracket and rear end cap, it is provided with the internal partition using non-magnet material to make between described coil mounting groove and piston head, between described coil mounting groove and the inwall of cylinder, is provided with the external partition using permeability magnetic material to make.

Self-adaptive damping elevator the most according to claim 6 damping assembly, it is characterized in that: described tubular MR damper also includes floating piston, described floating piston is located in the second chamber and the second chamber is separated into the 3rd chamber and the 4th chamber, described first chamber and the 3rd chamber communicate and are filled with magnetic flow liquid, and described 4th chamber is filled with compressed inert.

Self-adaptive damping elevator the most according to claim 1 damping assembly, it is characterized in that: described in lift arm and be made up of horizontal arm and bent over arms that is axially extending by horizontal arm one end and that be folded upward at being formed, the other end of horizontal arm is circumferentially fixing with rotating shaft to be connected, and the upper end of described bending arm is hinged with roller installation seat plate bottom surface.

Self-adaptive damping elevator the most according to claim 9 damping assembly, it is characterised in that: the lower section of described horizontal arm is provided with the cylinder for promoting horizontal arm to reset.

Self-adaptive damping elevator the most according to claim 1 damping assembly, it is characterised in that: described descent parameters detector unit includes:

Falling speed detection sensor, is used for detecting car falling speed parameter；

Elevator box weight parameter sensor, for detecting the real-time load weight parameter of elevator box；

Whereabouts contact pressure detection sensor, pressure parameter during for detecting and contacting with buffer board when car falls, buffer board produced；

Deflection angle detection sensor, respectively lifts deflection angle parameter when arm is lifted for detection.