Mine hoist system gyro wheel cage shoe buffer
阅读说明：本技术 一种矿井提升系统滚轮罐耳缓冲器 (Mine hoist system gyro wheel cage shoe buffer ) 是由 姚建南 朱昱 朱维南 张福豹 张旭东 刘建鹏 于 2019-11-22 设计创作，主要内容包括：本发明涉及一种矿井提升系统滚轮罐耳缓冲器,包括缸体、活塞、活塞轴、若干励磁线圈以及弹性部件；活塞轴可纵向移动地插接于缸体中,活塞连接于活塞轴的中部,缸体内部充满磁流变液；活塞轴带动活塞在缸体内纵向移动时,磁流变液自活塞的一侧向另一侧流动,形成磁流变液的流路；励磁线圈设置于流路侧,励磁线圈通电时向流路中的磁流变液加载磁场；活塞轴的两端位于缸体的纵向两端外侧,其一端为输出端,另一端与弹性部件连接。本发明通过改变磁流变液流经间隙时的阻尼力,对提升容器的横向振动进行控制,从而保证了提升容器的平稳运行,减小了滚轮罐耳的动态载荷,减小了对机械结构的冲击,延长了滚轮罐耳的使用寿命。(The invention relates to a roller cage shoe buffer of a mine hoisting system, which comprises a cylinder body, a piston shaft, a plurality of magnet exciting coils and an elastic component, wherein the piston is arranged in the cylinder body; the piston shaft can be longitudinally movably inserted into the cylinder body, the piston is connected to the middle part of the piston shaft, and magnetorheological fluid is filled in the cylinder body; when the piston shaft drives the piston to move longitudinally in the cylinder body, the magnetorheological fluid flows from one side of the piston to the other side of the piston to form a flow path of the magnetorheological fluid; the excitation coil is arranged on the side of the flow path, and loads a magnetic field to the magnetorheological fluid in the flow path when the excitation coil is electrified; the two ends of the piston shaft are positioned at the outer sides of the two longitudinal ends of the cylinder body, one end of the piston shaft is an output end, and the other end of the piston shaft is connected with the elastic component. The invention controls the transverse vibration of the lifting container by changing the damping force when the magnetorheological fluid flows through the gap, thereby ensuring the stable operation of the lifting container, reducing the dynamic load of the roller cage shoe, reducing the impact on a mechanical structure and prolonging the service life of the roller cage shoe.)
1. A roller cage shoe buffer of a mine hoisting system is characterized by comprising a cylinder body, a piston shaft, a plurality of magnet exciting coils and an elastic component; the piston shaft can be longitudinally movably inserted into the cylinder body, the piston is connected to the middle part of the piston shaft, and magnetorheological fluid is filled in the cylinder body; when the piston shaft drives the piston to move longitudinally in the cylinder body, the magnetorheological fluid flows from one side of the piston to the other side of the piston to form a flow path of the magnetorheological fluid; the excitation coil is arranged on the side of the flow path, and when the excitation coil is electrified, a magnetic field is loaded on the magnetorheological fluid in the flow path; and two ends of the piston shaft are positioned outside the longitudinal two ends of the cylinder body, one end of the piston shaft is an output end, and the other end of the piston shaft is connected with the elastic component.
2. The mine hoist system roller lug bumper of claim 1, wherein the resilient member is a belleville spring.
3. The mine hoist system roller shoe bumper of claim 2, wherein a spring cartridge for receiving the belleville spring is attached to one end of the cylinder.
4. The mine hoist system roller shoe bumper of claim 1, wherein a gap exists between the outer peripheral edge of the piston and the inner wall of the cylinder, and wherein the piston has an annular mounting groove in the middle thereof, the field coil being wound in the mounting groove; thus, the gap forms the flow path to which the exciting coil can apply a magnetic field.
5. The mine hoist system roller shoe bumper of claim 2, wherein a tunnel is formed in one side of the output end of the piston shaft and extends longitudinally along the interior of the piston shaft to the mounting groove, and cables for supplying power to the field coil are distributed in the tunnel.
6. The mine hoist system roller shoe bumper of claim 1, wherein the outer wall of the cylinder block is connected with a plurality of branch pipes, and both ends of the branch pipes are respectively communicated with the inner spaces of both ends of the cylinder block; the excitation coil is arranged in the middle of the branch pipe.
7. The mine hoist system roller shoe bumper of claim 2, wherein temperature control members are disposed on opposite sides of the field coil for maintaining a constant temperature of the magnetorheological fluid flowing through the interior of the field coil.
Technical Field
The invention relates to a buffer, in particular to a roller cage shoe buffer of a mine hoisting system.
Background
Rigid cage guides and roller cage shoes are mostly used as guides for lifting containers in deep mine lifting systems. The roller cage shoe device plays a role in guiding, buffering and damping in the lifting process, and the performance of the roller cage shoe device directly influences the stability of the operation of a lifting container.
At present, the interior of a traditional roller cage shoe buffer device is generally composed of a plurality of disc springs, and the disc springs are used as vibration reduction elements of the roller cage shoe and can absorb impact caused by cage guide defects. However, the disc spring has high rigidity, so that the roller cage shoe has slow response to instantaneous impact, high impact force and serious abrasion of the polyurethane rubber wheel, so that the service life of the roller cage shoe is shortened, the container vibrates greatly in the operation process, the stability is poor and the reaction to transverse dynamic impact is insufficient.
Disclosure of Invention
The invention aims to provide a roller cage shoe buffer of a mine hoisting system aiming at the defects and shortcomings of the prior art, so that the buffer has stronger impact absorption capacity and faster response; the damping force can be adjusted in real time, and the service life of the roller cage shoe of the mine hoisting system is effectively prolonged.
In order to achieve the purpose, the invention adopts the following technical scheme:
a roller cage shoe buffer of a mine hoisting system comprises a cylinder body, a piston shaft, a plurality of magnet exciting coils and an elastic component; the piston shaft can be longitudinally movably inserted into the cylinder body, the piston is connected to the middle part of the piston shaft, and magnetorheological fluid is filled in the cylinder body; when the piston shaft drives the piston to move longitudinally in the cylinder body, the magnetorheological fluid flows from one side of the piston to the other side of the piston to form a flow path of the magnetorheological fluid; the excitation coil is arranged on the side of the flow path, and when the excitation coil is electrified, a magnetic field is loaded on the magnetorheological fluid in the flow path; and two ends of the piston shaft are positioned outside the longitudinal two ends of the cylinder body, one end of the piston shaft is an output end, and the other end of the piston shaft is connected with the elastic component.
The roller cage shoe buffer of the mine hoisting system is further designed in that the elastic component is a disc spring.
The roller cage shoe buffer of the mine hoisting system is further designed in that one end of the cylinder body is connected with a spring barrel used for accommodating the disc spring.
The roller cage shoe buffer of the mine hoisting system is further designed in that a gap exists between the outer peripheral edge of the piston and the inner wall of the cylinder body, the middle part of the piston is provided with an annular mounting groove, and the magnet exciting coil is wound in the mounting groove; thus, the gap forms the flow path to which the exciting coil can apply a magnetic field.
The mine hoisting system roller cage shoe buffer is further designed in that a pore canal which longitudinally extends to the mounting groove along the inside of the piston shaft is formed in one side of the output end of the piston shaft, and cables for supplying power to the magnet exciting coil are distributed in the pore canal.
According to the technical scheme, the magnetic field loaded in the gap between the piston and the inner wall of the cylinder body can be changed by adjusting the current of the magnet exciting coil, so that the damping force when the magnetorheological fluid flows through the gap is changed, the transverse vibration of the lifting container is controlled, the stable operation of the lifting container is ensured, the dynamic load of the roller cage shoe is reduced, the impact on a mechanical structure is reduced, and the service life of the roller cage shoe is prolonged.
Because the invention is applied to the mine hoisting system, the working environment is comparatively harsh and the continuous working time is longer, once the excitation coil works abnormally, the cylinder body, the piston shaft and the piston need to be disassembled for maintaining and updating the excitation coil, which is very inconvenient; and the pore channel where the exciting coil power supply cable is located may cause the leakage problem of the magnetorheological fluid due to the failure of the sealing material; based on this, the structure of the exciting coil can be set as follows:
the roller cage shoe buffer of the mine hoisting system is further designed in that the outer wall of the cylinder body is connected with a plurality of branch pipes, and two ends of each branch pipe are respectively communicated with the inner spaces of two ends of the cylinder body; the excitation coil is arranged in the middle of the branch pipe.
In addition, as the two ends of the working stroke of the mine hoisting system may have larger temperature difference, and the viscosity of the magnetorheological fluid without loading the magnetic field is negatively related to the temperature below 100 ℃, the magnitude of the damping force is not only related to the working power of the magnetic coil, so that the technical scheme is further improved, a temperature control component is introduced to eliminate the influence of the temperature on the viscosity of the magnetorheological fluid, and the control on the damping force is more accurate.
The roller cage shoe buffer of the mine hoisting system is further designed in that temperature control parts are arranged on two sides of the magnet exciting coil and used for keeping the temperature of magnetorheological fluid flowing through the magnet exciting coil constant.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is an installation diagram of embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
Detailed Description
In order to make the objects and technical solutions of the present invention easier to understand, the present invention will be described and explained below with reference to specific embodiments.
Fig. 1 shows a roller cage shoe buffer of a mine hoisting system, which comprises a cylinder body 1, a piston 2, a
Specifically, the
A gap is reserved between the outer peripheral edge of the piston and the inner wall of the cylinder body, an
And one side of the output end of the piston shaft is provided with a
As shown in fig. 2, in the present embodiment, when the roller cage shoe is used, the output end of the piston shaft is connected to the roller cage shoe, the outer end of the spring cylinder is hinged to the base, and then the current of the excitation coil can be adjusted in real time to change the magnetic field loaded in the gap between the piston and the inner wall of the cylinder body according to the acceleration signal value measured by the acceleration sensor connected to the mine hoisting system or the roller cage shoe during the operation of the roller cage shoe, so as to change the damping force when the magnetorheological fluid flows through the gap, and control the lateral vibration of the hoisting container, thereby ensuring the stable operation of the hoisting container, reducing the dynamic load of the roller cage shoe, reducing the impact on the mechanical structure, and prolonging the service life of the roller cage shoe.
Because the invention is applied to the mine hoisting system, the working environment is comparatively harsh and the continuous working time is longer, once the excitation coil works abnormally, the cylinder body, the piston shaft and the piston need to be disassembled for maintaining and updating the excitation coil, which is very inconvenient; and the pore channel where the exciting coil power supply cable is located may cause the leakage problem of the magnetorheological fluid due to the failure of the sealing material; in addition, when the magnetorheological fluid control device is applied, the posture is usually inclined, a gap is reserved between the piston and the inner wall of the cylinder body, namely the piston is suspended in the middle of the cylinder body, and the piston shaft is possibly deformed under high-frequency shaking, so that the piston is inclined relative to the inner wall of the cylinder body, and a tiny gap is blocked, so that an unpredictable reduction of a flow path of the magnetorheological fluid is caused, and a corresponding control mode is completely not matched with actual application; based on this, the structure of the exciting coil can be set as follows to form embodiment 2:
as shown in fig. 3, the outer wall of the cylinder body is connected with a plurality of branch pipes 7, and two ends of the branch pipes are respectively communicated with the inner spaces of two ends of the cylinder body; at this time, the branch pipes form a flow path of the magnetorheological fluid, the
In addition, as the two ends of the working stroke of the mine hoisting system may have larger temperature difference, and the viscosity of the magnetorheological fluid without loading the magnetic field is negatively related to the temperature below 100 ℃, the magnitude of the damping force is not only related to the working power of the magnetic coil, so that the technical scheme is further improved, a temperature control component is introduced to eliminate the influence of the temperature on the viscosity of the magnetorheological fluid, and the control on the damping force is more accurate.
Temperature control parts 8 are arranged on two sides of the excitation coil and used for keeping the temperature of the magnetorheological fluid flowing through the inside of the excitation coil constant. The temperature control component 8 can be a heating component or a refrigerating component, so that the temperature tends to be constant between-20 ℃ and 100 ℃ in the magnetorheological fluid operation process. Specifically, the temperature sensor may be a thermal resistor, and the temperature sensor is arranged on the roller cage shoe or the lifting container to measure the temperature of the working environment of the embodiment, so that the thermal resistor is started to keep the working temperature of the magnetorheological fluid at 40 ℃, and then the current loaded on the excitation coil is corrected by combining the viscosity of the magnetorheological fluid at 40 ℃.
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