CN112249953A - Well axle sensing intelligence floodgate for hoist - Google Patents

Well axle sensing intelligence floodgate for hoist Download PDF

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Publication number
CN112249953A
CN112249953A CN202011271255.3A CN202011271255A CN112249953A CN 112249953 A CN112249953 A CN 112249953A CN 202011271255 A CN202011271255 A CN 202011271255A CN 112249953 A CN112249953 A CN 112249953A
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CN
China
Prior art keywords
sensor
shaft sensor
intelligent brake
brake
middle shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011271255.3A
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Chinese (zh)
Inventor
鲍万年
许长春
周星海
李潇洋
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Luoyang Hongxin Heavy Machinery Co ltd
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Luoyang Hongxin Heavy Machinery Co ltd
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Application filed by Luoyang Hongxin Heavy Machinery Co ltd filed Critical Luoyang Hongxin Heavy Machinery Co ltd
Priority to CN202011271255.3A priority Critical patent/CN112249953A/en
Publication of CN112249953A publication Critical patent/CN112249953A/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
    • B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/26—Operating devices pneumatic or hydraulic
    • B66D5/28—Operating devices pneumatic or hydraulic specially adapted for winding gear, e.g. in mining hoists

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Braking Arrangements (AREA)

Abstract

A middle shaft sensing intelligent brake for a lifter comprises an outer shell, an intelligent brake cylinder body, a brake shoe pressing strip, a brake shoe, an adjusting nut, an oil cylinder, a piston, an oil cylinder cover, a tensioning bolt and a support sleeve; a middle shaft sensor assembly is arranged in the intelligent brake cylinder body, a disc spring is sleeved on the periphery of the middle shaft sensor assembly, and a disc spring pad is arranged between the disc spring and the oil cylinder; the middle shaft sensor assembly comprises a middle shaft sensor outer sleeve, a middle shaft sensor core and a connecting bridge, wherein two round holes are symmetrically processed on the circumferential surface of the middle shaft sensor core, a sensor web plate sensitive to force is formed in the middle of each round hole, and strain gauges are uniformly arranged on the sensor web plates.

Description

Well axle sensing intelligence floodgate for hoist
Technical Field
The invention relates to the field of on-site safe operation, maintenance and monitoring of mine hoist equipment, in particular to a middle shaft sensing intelligent brake for a hoist.
Background
The mine elevator is a key device for underground mining and transportation of metal ores and coal, the elevator is safe to operate, the safety and reliability of work braking and safe emergency braking of the whole system in the working process can be guaranteed only when the braking force of a braking system needs to be maintained within a safety limit, the key link of the braking system is a brake, and the brake of the elevator is provided with a common brake and a force monitoring type intelligent brake.
The conventional general measure for monitoring the normal braking positive pressure of the ordinary brake of the elevator is to take the opening gap value as a reference, and basically adopts an indirect qualitative measure, namely, the opening gap value is kept not to be attenuated.
Disclosure of Invention
The invention aims to provide a middle shaft sensing intelligent brake for a lifter.
The purpose of the invention is realized by adopting the following technical scheme. The invention provides a middle shaft sensing intelligent brake for a lifter, which comprises an outer shell, an intelligent brake cylinder body, a brake shoe pressing bar, an adjusting nut, an oil cylinder, a piston, an oil cylinder cover, a tensioning bolt and a support sleeve, wherein the outer shell is installed on an intelligent brake seat; the supporting sleeve and the piston are isolated by an O-shaped ring and are in soft connection, and a first sealing ring and a second sealing ring which are used for preventing oil leakage and are in sliding contact are arranged between the piston and the oil cylinder;
a central shaft sensor assembly with one end provided with a cap head edge and the other end connected with a tension bolt through threads is installed in the intelligent brake cylinder body, a disc spring is further sleeved on the periphery of the central shaft sensor assembly, a disc spring pad used for supporting the compression force of the disc spring is arranged between the disc spring and the oil cylinder, one end of the disc spring abuts against the cap head edge, and the other end of the disc spring abuts against the disc spring pad;
the center shaft sensor assembly comprises a center shaft sensor outer sleeve, a tension bolt connecting screw thread used for being in threaded connection with a tension bolt is arranged on the center shaft sensor outer sleeve, a cavity, a connected bridge and installation cavities symmetrically arranged on two sides of the connected bridge are arranged in the center shaft sensor outer sleeve, a center shaft sensor core is arranged in the cavity, a sensor signal line perforation is arranged on the connected bridge, a sensor pressure resisting head is arranged on the outer side of one end, away from the connected bridge, of the center shaft sensor core, two round holes are symmetrically machined in the cylindrical surface of the center shaft sensor core, a sensor web sensitive to force is formed between the two round holes, at least one strain gauge is uniformly arranged on two surfaces of the sensor web, a circuit board used for amplifying and transmitting signals is arranged in the round holes of the center shaft sensor;
two installation cavities are symmetrically processed on the side face of the connected bridge, the hollow part of the sensor tensioning spring is penetrated by the middle shaft sensor tensioning screw and restrains the connected bridge and the sensor tensioning spring into a whole, a through hole for the middle shaft sensor tensioning screw to penetrate is arranged on the core of the middle shaft sensor, and the middle shaft sensor tensioning screw is installed on the intelligent brake cylinder body.
Preferably, the bottom of the intelligent brake cylinder body is provided with an annular sinking groove, and the edge part of the left cap head of the outer sleeve of the middle shaft sensor is partially embedded into the annular space of the sinking groove and keeps a gap with the bottom of the annular space.
Preferably, the gap has a size in the range of 0mm to 10 mm.
Preferably, a pressure-resistant pad used for bearing the positive braking pressure is arranged between the pressure-resistant head of the sensor and the intelligent brake cylinder body.
Preferably, the outer surface of the pressure resistant head of the sensor is planar or spherical.
Preferably, the outer surface of the pressure resistant pad is planar or spherical.
Preferably, a plurality of rotation stopping openings are symmetrically formed in the circumference of the maximum diameter of the cap edge, and rotation stopping screws of a middle shaft sensor assembly for preventing the middle shaft sensor and the intelligent brake cylinder from rotating relatively when the tensioning bolts are screwed down are installed in the rotation stopping openings.
Preferably, the rotation-stopping screw is a threaded set screw or a non-threaded set pin.
The middle shaft sensing intelligent brake for the hoister has the following advantages:
1. the invention can detect the real braking positive pressure through the middle shaft sensor assembly when the elevator brakes, provides a direct quantitative means for judging the braking positive pressure of the intelligent brake of the elevator, and is beneficial to intuitively and quickly knowing the braking positive pressure condition of the intelligent brake of the elevator, thereby quickly judging and adjusting and ensuring the braking safety of the elevator.
2. The invention directly detects the real brake positive pressure of the brake and extends the actually measured brake force of the intelligent brake to the total brake torque under the condition of verifying the running state of the elevator system through the intelligent analysis of the computer so as to judge whether the brake force meets the related safety standard requirement issued by the state, thereby having practical significance for the engineering practice of mine running equipment.
The foregoing is a summary of the present invention, and for the purpose of making the technical means of the present invention more comprehensible, embodiments thereof are described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of a hoist with a center shaft sensing intelligent brake as a braking component;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a front view of a center shaft sensing intelligent brake for a hoist;
FIG. 4 is a cross-sectional view taken at B-B of FIG. 3 (with the bottom bracket sensor assembly not shown in section);
FIG. 5 is a cross-sectional view taken at B-B of FIG. 3;
FIG. 6 is a perspective view of a medial axis sensing intelligent brake;
FIG. 7 is a schematic view of the medial axis sensing smart brake in another direction;
FIG. 8 is a front view of the smart brake cylinder body;
FIG. 9 is a cross-sectional view of the smart brake cylinder body;
FIG. 10 is a schematic view of the assembly of the smart brake cylinder body and the central axis sensor assembly;
FIG. 11 is a perspective cut-away view of the assembly of the smart brake cylinder body and the central sensor assembly;
FIG. 12 is a cross-sectional view of the bottom bracket sensor assembly;
FIG. 13 is a perspective cross-sectional view of the bottom bracket sensor assembly;
FIG. 14 is a front view of a bottom bracket sensor core;
FIG. 15 is a perspective schematic view of a bottom bracket sensor core;
FIG. 16 is a perspective cross-sectional view of the bottom bracket sensor cover in this embodiment
FIG. 17 is a view of the sense bridge of the bottom bracket sensor assembly.
[ reference numerals ]
I-elevator brake disc, II-middle shaft sensing intelligent brake, III-intelligent brake block, IV-elevator main shaft device bearing block, V-bearing block supporting beam, VI-main shaft device winding drum, VII-elevator steel wire rope, G-middle shaft sensor assembly,
1-outer shell, 2-brake shoe, 4-disc spring, 5-end cover, 6-oil cylinder, 7-piston, 8-tension bolt, 9-support sleeve, 10-first seal ring I, 11-second seal ring, 12-disc spring pad, 13-adjusting nut, 14-oil cylinder cover, 15-oil inlet channel, 16-brake shoe press bar, 17-brake shoe hold-down screw, 18-oil cylinder cover fixing screw, 19-middle shaft sensor jacket, 1901-cavity, 20-middle shaft sensor tensioning screw, 21-sensor tensioning spring, 22-middle shaft sensor core, 23-pressure pad, 26-rotation stop port, 27-middle shaft sensor assembly rotation stop screw, 28-middle shaft sensor assembly rotation stop screw hole, 29-tension bolt connecting screw thread, 32-cap edge, 33-sink groove, 34-intelligent brake cylinder tensioning screw hole, 35-intelligent brake cylinder, 36-strain gauge, 37-gap, 38-connecting bridge, 3801-installation cavity, 39-sensor signal line perforation, 40-sensor web plate and 41-sensor pressure resistance head.
Detailed Description
In order to further illustrate the technical means and effects of the present invention adopted to achieve the predetermined purpose, the following describes in detail a middle shaft sensing intelligent brake for a hoist according to the present invention with reference to the accompanying drawings and preferred embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 17, the central shaft sensing intelligent brake for the elevator of the present invention includes a central shaft sensing intelligent brake ii (hereinafter referred to as intelligent brake) fixed on an intelligent brake seat iii, and the left and right sides of an elevator brake disc i are respectively clamped by the intelligent brake to be in a braking state.
Referring to fig. 3, 4, 5, 6 and 7, the intelligent brake ii includes an outer shell 1 installed on an intelligent brake seat iii, an intelligent brake cylinder 35 installed in the outer shell 1 and slidably connected to the outer shell and having a disc spring 4 inside, and a brake shoe 2 installed closely to the left outer plane of the intelligent brake cylinder, the brake shoe and the intelligent brake cylinder 35 are fastened into a whole by a brake shoe hold-down screw 17 and a brake shoe press strip 16, an adjusting nut 13 connected to the tail of the outer shell by a thread, and a middle axis sensor assembly G is installed in the intelligent brake cylinder.
An oil cylinder 6 is arranged in the adjusting nut, an oil cylinder cover 14 for sealing and fixing the oil cylinder is arranged at the tail part of the left side of the adjusting nut, an end cover 5 is arranged on the oil cylinder cover, the oil cylinder cover is fixedly arranged at the side surface of the oil cylinder 6 through an oil cylinder cover fixing screw 18 and is blocked at the left side of the tail part of the adjusting nut and is in rotary sliding contact with an adjusting nut 13, oil inlet and outlet oil of the oil cylinder is communicated with oil of a hydraulic station control pipeline through an oil inlet channel 15, a piston 7 in the oil cylinder is sealed in the oil cylinder through the oil cylinder cover and is in sliding connection in an oil cylinder cavity, the middle of the piston 7 is penetrated by a tensioning bolt 8, a supporting sleeve 9 for supporting the tensioning bolt is further arranged between the tensioning bolt and the piston, the supporting sleeve and the piston are isolated through an O-shaped ring and are in soft connection between, the tension bolt 8, the support sleeve 9, the piston 7, the middle shaft sensor assembly G and the intelligent brake cylinder body 35 are connected into a whole through the pretightening force of threaded connection between the tension bolt and the middle shaft sensor assembly G. A first sealing ring 10 and a second sealing ring 11 which are used for preventing oil leakage and are in sliding contact are further arranged between the piston and the oil cylinder, and the specific positions of the first sealing ring and the second sealing ring are shown in fig. 4.
Referring to fig. 4 to 13, a cap edge 32 is provided at the left end of the center shaft sensor assembly G, a tension bolt connecting screw thread 29 is processed at the middle part of the right end surface, the tension bolt connecting screw thread is in threaded connection with the tension bolt, a disc spring 4 is further sleeved on the periphery of the center shaft sensor assembly, the center shaft sensor assembly plays a guiding role when the disc spring is compressed or extended so as to prevent the disc spring from moving transversely, a disc spring pad 12 for supporting the compression force of the disc spring is installed at the right side of the group of disc springs, the disc spring pad is located between the disc spring and the oil cylinder and is in close contact with the disc spring and the oil cylinder respectively (see the specific position of the disc spring pad in fig. 4), the left side of the group of disc springs is pressed against the cap edge 32, two rotation stopping ports 26 are symmetrically provided on the circumference of the maximum diameter of the cap edge, the fixed positioning of the rotation trend between the center shaft sensor outer sleeve 19 and the intelligent brake cylinder is realized by a rotation stopping screw 27 (hereinafter, when the tension bolt 8 is connected with the screw thread 29 through the tension bolt to screw the central shaft sensor assembly G to bear torque, the central shaft sensor assembly and the intelligent brake cylinder body can be prevented from rotating relatively, and the rotation stopping screw 27 can be a positioning screw with screw threads according to needs or a positioning pin without screw threads according to needs. The bottom of the intelligent brake cylinder body is provided with an annular sinking groove 33 (please refer to fig. 8 and 9), the left cap head edge part of the middle shaft sensor outer sleeve 19 is partially embedded into the annular space of the sinking groove 33 and keeps a gap 37 with the bottom of the annular space, and the size range of the gap 37 is 0mm-10 mm.
A middle shaft sensor outer sleeve 19 (please refer to fig. 16) is arranged at the periphery of the middle shaft sensor assembly, a cavity 1901, a connecting bridge 38 and installation cavities 3801 symmetrically arranged at two sides of the connecting bridge 38 are arranged in the middle shaft sensor outer sleeve, the connecting bridge 38 and the middle shaft sensor outer sleeve 19 are of an integrated structure, a middle shaft sensor core 22 is arranged in the cavity 1901, a sensor signal line through hole is arranged on the connecting bridge 38, a sensor pressure resisting head 41 is arranged at the outer side of one end, away from the connecting bridge, of the middle shaft sensor core, please refer to fig. 12 to 15, in the embodiment, the middle shaft sensor core 22 is cylindrical, two circular holes are symmetrically processed on the cylindrical surface of the middle shaft sensor core, a sensor web 40 sensitive to force is formed between the two circular holes, at least one strain gauge 36 is uniformly arranged on two surfaces of the sensor web, in the embodiment, certainly, in other embodiments of the invention, the number of the strain gauges can be set to 1 or more according to requirements, a circuit board for amplifying and transmitting signals is arranged in the circular hole of the center shaft sensor core, the strain gauges are electrically connected with the circuit board, strain gauge data measured by the strain gauges pass through the circuit board, and remote signals are transmitted out of the intelligent gate through the sensor signal wire through holes to be comprehensively analyzed and displayed by a peripheral computer system; the right plane of the center shaft sensor core is in complete plane contact with the left plane of the connecting bridge.
Two counter bores are symmetrically processed on the right circular plane of the connecting bridge 38 to serve as installation cavities 3801, the hollow part of the sensor tensioning spring is penetrated through by a middle shaft sensor tensioning screw 20, a through hole for the middle shaft sensor tensioning screw 20 to penetrate through is formed in the core of the middle shaft sensor, and the tensioning screw penetrating through the core of the sensor is installed in the intelligent brake cylinder tensioning screw hole 34 in a threaded mode.
The bottom center position of the intelligent brake cylinder 35 is provided with a pressure resistant pad 23, the pressure resistant pad is arranged between the sensor pressure resistant head 41 and the bottom of the intelligent brake cylinder and is used for bearing the braking positive pressure transmitted from the brake shoe 2 to the center shaft sensor core 22, the outer surface of the sensor pressure resistant head 41 is a plane, a spherical surface or other arc-shaped curved surfaces, and the outer surface of the pressure resistant pad 23 is a plane, a spherical surface or other arc-shaped curved surfaces.
Of course, in other embodiments of the present invention, the pressure resistant pad may not be provided as needed.
The working process is as follows:
in order to open the intelligent brake and enable the brake shoe to leave the brake disc I of the elevator, hydraulic oil with certain pressure is provided by an elevator hydraulic station and enters an inner cavity of an oil cylinder 6 from an oil inlet channel 15 to push a piston 7 to move towards the right, the piston drives a support sleeve 9, a tension bolt 8 and a middle shaft sensor assembly G to drive an intelligent brake cylinder body 35 to move towards the right and compress a disc spring 4 to accumulate energy, a disc spring pad 12 has a limiting effect on the total compression deformation of the disc spring, the middle shaft sensor assembly can guide the disc spring to compress or extend along the longitudinal axis direction of the middle shaft sensor assembly at the center of the disc spring at the same time to prevent the disc spring from moving transversely in a dislocation way in the moving process, and the accumulated force of the compression deformation of the disc spring is used as the condition of forming a braking positive pressure between the brake shoe and the brake disc during closing so as to form the condition of braking.
When the intelligent brake is switched on, the brake shoe releases positive pressure to the brake disc of the elevator so as to form friction torque to brake the elevator, pressure oil in the inner cavity of the oil cylinder is discharged into an oil tank of a hydraulic station through an oil inlet channel, the disc spring rebounds under the action of deformation accumulation force at the moment, the intelligent brake cylinder body, the brake shoe, the middle shaft sensor assembly, the tensioning bolt and the piston are driven to slide in the outer shell to move to the left, the brake shoe is tightly attached to the brake disc and applies braking positive pressure to the brake disc, and the friction force is generated under the action of the friction coefficient so that the brake shoe forms braking friction torque to the rotating brake disc, so that the elevator in operation is braked.
When a brake shoe applies a braking positive pressure to the lateral surface of a brake disc, according to a statics law that the magnitude of an acting force and the reacting force are equal and the direction is opposite, the reacting force of the brake disc to the brake shoe is transmitted to a sensor pressure resisting head 41 of a central shaft sensor core 22 in a central shaft sensor assembly G through the brake shoe and a pressure resisting pad 23 on an intelligent brake cylinder body, then the reacting force is transmitted to a connecting bridge of a sensor jacket of the central shaft sensor assembly from the right side end face of the central shaft sensor core, then the reacting force is transmitted to an oil cylinder 6 through a cap head edge 32 of the central shaft sensor jacket 19 and then sequentially transmitted to an adjusting nut 13 through a disc spring 4 and a disc spring pad 12, the adjusting nut 13 is driven by the oil cylinder to form a trend of moving rightwards, the braking positive pressure is transmitted to an outer shell 1 through a thread of the adjusting nut, then the force is transmitted to a vertical plate of an intelligent brake seat III, and then the intelligent brake seat, when the braking positive pressure of the intelligent brake is transmitted to the middle shaft sensor core 22, the real load is sensed and then converted into an electric signal to be transmitted to the computer.
When the intelligent brake brakes the brake disc, the elastic force accumulated by the disc spring is released when the intelligent brake is opened in advance, and the pressure borne by the brake disc is the brake positive pressure, as shown in fig. 5, the positive pressure transmission path is as follows:
when pressure oil in an inner cavity formed between the piston and the oil cylinder is discharged to an oil tank of a hydraulic station, the piston moves leftwards, the disc spring is pressed tightly on the cap head edge 32 under the action of accumulated elasticity in advance, the end surface on the left side of the middle shaft sensor jacket and the lower sunken groove 33 of the intelligent brake cylinder body are in a non-contact state and have a gap 37, just because of the gap 37, the accumulated disc spring elasticity cannot be transmitted to the bottom of the intelligent brake cylinder body from the annular end surface on the left side of the middle shaft sensor jacket 19, but the disc spring elasticity is transmitted to the end surface on the right side of the middle shaft sensor core 22 through the end surface on the left side of the connecting bridge 38, the pressure resisting head 41 on the left side of the middle shaft sensor core is in close contact with the pressure resisting pad 23 and is transmitted to the contact surface of the intelligent brake cylinder body 35 and the brake shoe 2, then the brake shoe applies braking, the force sensitive sensor web 40 arranged in the center of the central axis sensor core is a force sensitive body, a strain gauge arranged on the sensor web converts the stress strain into an electric signal, the signal is amplified by an amplifier plate arranged in the circular hole inner cavity, and the signal is sent out from the sensor signal wire through hole 39 to be comprehensively analyzed and displayed by a peripheral computer system.
When the intelligent brake is opened, the brake shoe leaves the brake disc, because pressure oil enters the cylinder cavity from the oil inlet channel 15 to drive the piston together with the support sleeve 9, the tensioning bolt 8 and the middle shaft sensor outer sleeve 19 to move rightwards, at the moment, the cap head edge 32 applies pressure to the disc spring which is tightly contacted with the disc spring and pushes the disc spring to move rightwards to compress the disc spring, when the intelligent brake is opened, the middle shaft sensor outer sleeve 19 moves rightwards to connect the connecting bridge 38 to push the sensor tensioning spring 21 to move rightwards, because the threads at the left end of the two sensor tensioning screws 20 are screwed into the two intelligent brake cylinder tensioning screw holes 34 in advance and certain pre-tightening force is applied to the two tensioning springs 21, the connecting bridge 38, the sensor tensioning spring 21 and the middle shaft sensor tensioning screw 20 are fixedly restrained into an integrated structure, when the middle shaft sensor outer sleeve connecting bridge 38 moves rightwards, the sensor tensioning spring 21 is pushed to move rightwards to drive the cap head Because the threaded part of the middle shaft sensor tensioning screw 20 is screwed into the intelligent brake cylinder tensioning screw hole 34 of the intelligent brake cylinder 35 with a certain torque to form a fixed shape, the intelligent brake cylinder 35 is driven to move towards the right side, the brake shoe leaves the brake disc along with the intelligent brake cylinder tensioning screw, so that the brake disc braking positive pressure is removed to form an open brake state, the stress of the brake shoe is zero, the force transmitted to the sensor core by the pressure pad is also zero, and the elevator normally enters a lifting working procedure.
The pretightening force of the pretightening state of the sensor tension spring 21 designed in the middle shaft sensor assembly G provides guarantee for driving the intelligent brake cylinder 35 to move towards the right side for opening the brake and sufficiently overcoming the sliding resistance between the outer circumferential surface of the cylinder and the inner circumferential surface of the outer shell 1.
Referring to FIGS. 14 and 17, excitationVoltage UInput deviceThe working voltage is input to the bridge circuit, and the stress signal induced by the strain gauge circuit arranged in the core of the middle shaft sensor is converted into delta U by the circuitOutput ofAnd the voltage variable quantity is output and sent to an integrated amplifying circuit arranged in the core of the middle shaft sensor for processing, and then output and remotely transmitted to a peripheral electric control system for centralized control application. The central position of the sensor web is provided with strain gauges on two surfaces, the classical situation is that each surface is provided with four strain gauges, and the strain gauges R1, R2, R3 and R4 are connected into an integrated circuit processing board arranged in a round hole of the center shaft sensor core 22 according to the circuit connection shown in figure 17. The conversion of the strain signal into an electrical signal output is formulated as follows:
the wire grid resistance value of the strain gauge is expressed as R, DeltaR is the resistance variation, and when the bonding position of the strain gauge generates small strain due to stress, the output voltage variation DeltaU converted by the bridge circuitOutput ofAnd an input excitation voltage UInput deviceHas a relation equation Delta UOutput of/UInput deviceIn general, the resistance of each strain gauge is substantially equal (Δ R1/R1 +/Δ R3/R3-/Δ R2/R2- Δ R4/R4)/4, and R1 ═ R2 ═ R3 ═ R4, the above expression is Δ UOutput of/UInput deviceUnder the condition of stress strain, the rate of change of resistance of a single strain gauge has a relation with the strain quantity of the strain gauge, namely the equation delta R/R is K epsilon, wherein K is a sensitivity coefficient of the strain gauge, the sensitivity coefficient is an inherent constant of a strain gauge body material, generally K is 2 (dimensionless), R is the resistance value (ohm) of the strain gauge, delta R is the resistance change quantity (ohm) of the strain gauge, and epsilon is the strain quantity (dimensionless) of the pasting position of the strain gauge. The output electrical signal of the bridge (i.e. the variation DeltaU of the output voltage of the bridge)Output of) The rate of change with respect to the input excitation voltage is calculated by the following equationOutput of/UInput deviceK (epsilon 1+ epsilon 3-epsilon 2-epsilon 4)/4, and the variation quantity delta U of the output voltage of the bridgeOutput ofWith respect to the input excitation voltage UInput deviceBy means of the sensitive reaction of the strain gauge to stress, the relationship between the electric quantity value and the mechanical physical quantity value is established, and the arrangement of each strain gauge is controlled by the electric bridgeThe physical quantity of the force realized by wiring is indirectly expressed by the electric quantity value, so that a method is provided for computerization, readability and visualization through the digital processing of the electric quantity by a computer. The strain gauge signal detection and conversion technology is the category of the existing mature technology and is not described in detail.
Each brake of the elevator is a brake unit, the brake torque of each brake unit is the product of brake positive pressure, brake shoe friction coefficient and brake radius, the total brake torque of the elevator system is comprehensively determined by all brake positive pressures of all brakes configured by a brake device system, and each brake is a contribution unit body of the total brake torque.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any simple modification, equivalent change and modification made by those skilled in the art according to the technical spirit of the present invention are still within the technical scope of the present invention without departing from the technical scope of the present invention.

Claims (8)

1. A middle shaft sensing intelligent brake for a lifter comprises an outer shell arranged on an intelligent brake seat, an intelligent brake cylinder body which is arranged in the outer shell, is in sliding connection with the outer shell and is internally provided with a disc spring, a brake shoe which is tightly attached to the side surface of the intelligent brake cylinder body, a brake shoe pressing strip which is fastened with the intelligent brake cylinder body into a whole through a brake shoe pressing screw, an adjusting nut in threaded connection with the tail of the outer shell, an oil cylinder arranged in the adjusting nut, a piston arranged in the oil cylinder, an oil cylinder cover which is arranged at the tail of the adjusting nut and used for sealing the oil cylinder and the piston, a tensioning bolt arranged on the piston, and a support sleeve which is arranged between the tensioning bolt and the piston and used for supporting the tensioning bolt; the supporting sleeve and the piston are isolated by an O-shaped ring and are in soft connection, and a first sealing ring and a second sealing ring which are used for preventing oil leakage and are in sliding contact are arranged between the piston and the oil cylinder;
the method is characterized in that: a central shaft sensor assembly with one end provided with a cap head edge and the other end connected with a tension bolt through threads is installed in the intelligent brake cylinder body, a disc spring is further sleeved on the periphery of the central shaft sensor assembly, a disc spring pad used for supporting the compression force of the disc spring is arranged between the disc spring and the oil cylinder, one end of the disc spring abuts against the cap head edge, and the other end of the disc spring abuts against the disc spring pad;
the center shaft sensor assembly comprises a center shaft sensor outer sleeve, a tension bolt connecting screw thread used for being in threaded connection with a tension bolt is arranged on the center shaft sensor outer sleeve, a cavity, a connected bridge and installation cavities symmetrically arranged on two sides of the connected bridge are arranged in the center shaft sensor outer sleeve, a center shaft sensor core is arranged in the cavity, a sensor signal line perforation is arranged on the connected bridge, a sensor pressure resisting head is arranged on the outer side of one end, away from the connected bridge, of the center shaft sensor core, two round holes are symmetrically machined in the cylindrical surface of the center shaft sensor core, a sensor web sensitive to force is formed between the two round holes, at least one strain gauge is uniformly arranged on two surfaces of the sensor web, a circuit board used for amplifying and transmitting signals is arranged in the round holes of the center shaft sensor;
two installation cavities are symmetrically processed on the side face of the connected bridge, the hollow part of the sensor tensioning spring is penetrated by the middle shaft sensor tensioning screw and restrains the connected bridge and the sensor tensioning spring into a whole, a through hole for the middle shaft sensor tensioning screw to penetrate is arranged on the core of the middle shaft sensor, and the middle shaft sensor tensioning screw is installed on the intelligent brake cylinder body.
2. The central shaft sensing intelligent brake for the elevator as claimed in claim 1, wherein: the bottom of the intelligent brake cylinder body is provided with an annular sinking groove, and the edge part of the left cap head of the outer sleeve of the middle shaft sensor is embedded into the annular space of the sinking groove and keeps a gap with the bottom of the annular space.
3. The central shaft sensing intelligent brake for the elevator as claimed in claim 2, wherein: the size of the gap ranges from 0mm to 10 mm.
4. The central shaft sensing intelligent brake for the elevator as claimed in claim 1, wherein: and a pressure resistant pad for bearing the positive pressure of braking is arranged between the pressure resistant head of the sensor and the intelligent brake cylinder body.
5. The central shaft sensing intelligent brake for the elevator as claimed in claim 4, wherein: the outer surface of the pressure resisting head of the sensor is plane or spherical.
6. The central shaft sensing intelligent brake for the elevator as claimed in claim 4, wherein: the outer surface of the pressure resistant pad is plane or spherical.
7. The central shaft sensing intelligent brake for the elevator as claimed in claim 1, wherein: a plurality of rotation stopping openings are symmetrically formed in the circumference of the maximum diameter of the cap edge, and rotation stopping screws of a center shaft sensor assembly for preventing the center shaft sensor and the intelligent brake cylinder from rotating relatively when the tensioning bolts are screwed down are installed in the rotation stopping openings.
8. The central shaft sensing intelligent brake for the elevator as claimed in claim 7, wherein: the rotation stopping screw is a positioning screw with screw threads or a positioning pin without screw threads.
CN202011271255.3A 2020-11-13 2020-11-13 Well axle sensing intelligence floodgate for hoist Withdrawn CN112249953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011271255.3A CN112249953A (en) 2020-11-13 2020-11-13 Well axle sensing intelligence floodgate for hoist

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Application publication date: 20210122