CN211314930U

CN211314930U - Closed oil cylinder intelligent brake sensor for hoister

Info

Publication number: CN211314930U
Application number: CN201922245117.7U
Authority: CN
Inventors: 鲍万年; 陆金鑫; 许霄煜; 陆胜香; 李晶蕊; 许长春
Original assignee: Luoyang Hongxin Heavy Machinery Co ltd
Current assignee: Luoyang Hongxin Heavy Machinery Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-08-21
Anticipated expiration: 2029-12-13

Abstract

The utility model relates to a lift is with closed hydro-cylinder intelligence floodgate sensor, install between intelligence floodgate dish spring pad and hydro-cylinder, the interval is provided with the sensing spoke between the outer ring of this sensor and the interior ring, every spoke side is all pasted and is had the foil gage that is used for surveing lifting machine braking normal pressure, a ring side and dish spring pad in the sensor in close contact with, another side and hydro-cylinder in close contact with, outer ring of sensor and sensing spoke and hydro-cylinder and dish spring pad all do not contact, it has a plurality of tension bolts to pass hole and a plurality of tension bolt and pipe to pass the hole to go back the equipartition on the outer ring of sensor. The utility model discloses can detect braking positive pressure data when the lifting machine closes a floodgate, for whether up to standard provides a direct monitoring means of lifting machine braking force moment, help directly perceived quick understanding lifting machine brake force condition, guarantee the braking safety of lifting machine.

Description

Closed oil cylinder intelligent brake sensor for hoister

Technical Field

The utility model relates to a mine winder equipment on-the-spot safe operation, maintenance and control field specifically are a closed hydro-cylinder intelligence floodgate sensor for lifting machine.

Background

The mining hoister is a key device for underground mining and transportation of metal ores and coal, and particularly, the braking force of a brake system of the hoister needs to be maintained within a safety limit so as to ensure the safety and reliability of the working brake and the safe emergency brake of the whole system in the working process.

The brake force control measures for the brake of the elevator in the past are based on the opening gap value as a reference, are basically indirect qualitative methods, cannot really master real data, maintain a value range to be proper by the opening gap, cannot directly know whether the brake force reaches the standard or not, indirectly reference standards and operation specifications related to whether the control brake force is in a normal range are indirectly qualitative by the opening gap value, and are lack of real and reliable quantitative means in the conventional brake force detection method.

Disclosure of Invention

To the above problem, the utility model provides a closed hydro-cylinder intelligence floodgate sensor for lifting machine installs between the dish spring pad and the hydro-cylinder of intelligence floodgate, and the interval is provided with the sensing spoke between the outer ring of sensor and the interior ring, and the side of every spoke is all pasted and is had the foil gage that is used for surveing braking normal pressure to form the sensitive district of atress, a side and the dish spring pad in the sensor of ring in close contact with, another side and hydro-cylinder in close contact with, outer ring of sensor and sensing spoke and hydro-cylinder and dish spring pad all do not all contact, the utility model discloses the sensor can detect braking normal pressure data when the combined floodgate, for whether up to standard provides a direct monitoring means of lifting machine braking force moment, helps directly perceived quick understanding lifting machine braking force condition, guarantees the braking safety.

The purpose of the utility model and the technical problem thereof are realized by adopting the following technical scheme. According to the utility model, the intelligent brake sensor for the closed oil cylinder of the elevator is arranged between the disc spring pad of the intelligent brake of the elevator and the closed intelligent brake oil cylinder, the intelligent brake comprises an outer shell, the tail part of the outer shell is in threaded connection with an adjusting nut, wherein the intelligent brake oil cylinder is arranged in the adjusting nut, and the parts of the outer circumferences of the intelligent brake sensor and the intelligent brake oil cylinder, which are in contact with the inner wall of the adjusting nut, are in sliding contact; a plurality of sensing spokes are uniformly distributed between an outer ring and an inner ring of the intelligent brake sensor, two ends of each spoke are respectively connected with the outer ring and the inner ring of the sensor, a space is reserved between every two adjacent spokes, two side surfaces of each spoke are respectively stuck with a strain gauge for measuring the positive braking pressure of a lifter, and the center of the sensor is a miniature circuit board mounting space; a plurality of tensioning bolt through holes and a plurality of tensioning bolt and round pipe through holes are uniformly distributed on the outer circular ring of the sensor;

one side surface of an inner ring of the intelligent brake sensor is tightly contacted with the disc spring pad, the other side surface of the inner ring is tightly contacted with the oil cylinder, an outer ring of the sensor and sensing spokes are not contacted with the oil cylinder and the disc spring pad, the surface of the sensor contacted with the disc spring pad is defined as a front side surface, the surface contacted with the oil cylinder is a rear side surface, a distance t1 exists between a first interface of the rear side surface of the sensor and a first interface of the front side surface of the oil cylinder, a distance t2 exists between a second interface of the rear side surface of the sensor and a second interface of the front side surface of the oil cylinder, a distance t3 exists between a third interface of the rear side surface of the sensor and a third interface of the front side surface of the oil cylinder, the value ranges of t1, t2 and t3 are all 0.1-3.0mm, and the value ranges; the first interface on the rear side surface of the sensor is in sliding contact with the adjusting nut to form a force load bearing interface;

the intelligent brake sensor detects positive pressure data of the elevator brake through the strain gauge when the elevator is switched on.

Further, the number of the tension bolts passing through the holes is 4, 8 or 12, and the number of the tension bolts and the round pipe passing through the holes is 4.

Furthermore, the number of sensing spokes evenly distributed between the outer ring and the inner ring of the sensor is 4, 8 or 12.

The utility model discloses following beneficial effect has:

the utility model installs the intelligent brake sensor between the disc spring pad and the oil cylinder, so that the sensor and the oil cylinder are in sliding contact with the adjusting nut, and two sides of the inner ring of the sensor are respectively in close contact with the disc spring pad and the oil cylinder, the outer ring of the sensor and the sensing spokes between the inner ring and the outer ring are not contacted with the disc spring pad and the oil cylinder, namely, three gaps t1, t2 and t3 exist on one surface of the sensor, which is contacted with the oil cylinder, and a strain gauge for measuring the braking positive pressure is pasted on the side surface of the sensing spoke to form a stress sensitive area, so that the intelligent brake can detect the real braking positive pressure through the sensor when braking the elevator, a direct quantitative means is provided for judging the braking positive pressure of the elevator, the braking force condition of the elevator can be intuitively and quickly known, the judgment and the adjustment can be quickly made, and the braking safety of the elevator is ensured.

The utility model discloses a sensor that designs detects real braking positive pressure and extends to the total braking torque of verifying under the lifting machine system running state with the braking force of sensor actual measurement through computer intelligence analysis in order to judge whether it accords with the relevant safety standard requirement of national promulgation, has realistic meaning very much to mine operation equipment engineering practice.

Drawings

FIG. 1 is a main view of a hoist with a smart brake as the braking component;

FIG. 2 is a top plan view of the hoist;

FIG. 3 is a schematic perspective view I of a closed cylinder sensing intelligent brake;

FIG. 4 is a schematic perspective view II of the closed cylinder sensing intelligent brake;

FIG. 5 is a cross-sectional view of a closed cylinder sensing intelligent brake;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a cross-sectional view of a closed cylinder sensing smart brake cylinder assembly;

FIG. 8 is a front view of the smart brake sensor;

FIG. 9 is a cross-sectional view taken along line C-C of FIG. 8;

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 8;

FIG. 11 is a schematic diagram of strain gage placement angles in side view along spokes F1 and F2;

FIG. 12 is a schematic diagram of a bridge test circuit formed by eight R1-R8 strain gauges connected together.

[ description of main element symbols ]

I-elevator brake disc, II-closed cylinder sensing intelligent brake, III-intelligent brake seat, IV-elevator main shaft device bearing seat, V-bearing seat supporting beam, VI-main shaft device winding drum, VII-elevator steel wire rope, 1-intelligent brake outer shell, 2-intelligent brake oil cylinder cover, 3-brake shoe layering, 4-hold-down screw, 5-brake shoe, 6-disc spring, 7-oil inlet channel, 8-intelligent brake disc spring pad, 9-adjusting nut, 10-cylinder body, 11-disc, 12-round tube, 13-tensioning bolt, 14-intelligent brake center shaft, 15-piston, 16-intelligent brake oil cylinder, 17-fixing screw, 18-closed oil cylinder sensor, 19-oil cylinder seal, 20-force load bearing interface, 21-the surface of the sensor in contact with the cylinder, 22-the surface of the sensor in contact with the disc spring pad, 23-the oil inlet joint, 24-the outer ring of the sensor, 25-the through hole of the tension bolt, 26-the through hole of the tension bolt and the circular tube, 27-the through hole of the inner ring of the sensor, 28-the sensing spoke, 29-the space between adjacent spokes, 30-the mounting hole of the fixing screw, 31-the mounting space of the miniature circuit board, 32-the first interface of the rear side of the sensor, 33-the first interface of the front side of the cylinder, 34-the second interface of the rear side of the sensor, 35-the second interface of the front side of the cylinder, 36-the third interface of the rear side of the sensor, 37-the third interface of the front side of the cylinder, 38-the internal routing channel of the sensor, 39-the outlet, 41-F2 visual side, 42-strain gage R1, 43-strain gage R2.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description is given with reference to the preferred embodiments of the present invention for a closed cylinder intelligent brake sensor for a hoist, and the specific embodiments, features and effects thereof are described in detail.

The utility model discloses an in the intelligent floodgate of the illustrated lifting machine of figure 1 was applied to the sensor, briefly explain lifting machine and intelligent floodgate earlier: intelligent brake bases III are installed on the left side and the right side of the elevator brake disc I, and a closed oil cylinder sensing intelligent brake II (hereinafter referred to as an intelligent brake) is fixed on each intelligent brake base. As shown in fig. 3-5, the intelligent brake ii includes an outer shell 1 fixed to an intelligent brake seat, a cylinder 10 disposed in the outer shell and slidably connected to the outer shell and having a disc spring 6 therein, a brake shoe press bar 3 fastened to the cylinder by a compression screw 4, a brake shoe 5 disposed in front of the brake shoe press bar, an adjusting nut 9 threadedly connected to the tail of the outer shell, and the like, wherein a closed intelligent brake cylinder 16 (hereinafter referred to as a cylinder) is disposed in the adjusting nut, the cylinder 16 is in sliding contact with the adjusting nut 9, an intelligent brake cylinder cover 2 is disposed at the tail of the adjusting nut, and oil inlet and outlet of the cylinder is connected to an oil inlet joint 23 disposed on the intelligent brake cylinder cover through an oil inlet passage 7; the oil cylinder 16 and the intelligent brake piston 15 arranged in the oil cylinder are sealed and fastened by the intelligent brake oil cylinder cover 2, the disc 11 is arranged in the intelligent brake oil cylinder cover, and the disc and the intelligent brake oil cylinder cover are in sliding contact. The rod part of the intelligent brake piston penetrates through a middle hole of the intelligent brake cylinder cover and props against the disc; a plurality of tie bolts 13 tightly connect the disc 11 and the cylinder 10 into a whole through the pretightening force of the threads, a round pipe 12 is arranged between the disc and the cylinder as a guarantee measure for accurately limiting the distance between the disc and the cylinder and penetrates through the oil cylinder cover 2, the oil cylinder 16 and the sensor 18, meanwhile, each round pipe is penetrated by the tie bolts, the tie bolts penetrating the round pipes are tightly connected with the cylinder through the threads to clamp the disc and the round pipe in the middle, the disc spring 6 is arranged on the periphery of a central shaft 14 of the intelligent brake in the cylinder, and an intelligent brake disc spring pad 8 (hereinafter referred to as a disc spring pad) is arranged at the tail part of the disc.

The utility model discloses an intelligence floodgate sensor (hereinafter referred to as sensor) is installed between dish spring pad and hydro-cylinder. The disc spring pad is fixed with the sensor through a fixing screw 17. One side surface of the sensor 18 is provided with a disc spring pad, and the other side surface is provided with an oil cylinder.

As shown in fig. 8, in order to cooperate with the installation of the tension bolt and the round tube, the utility model discloses an outer ring 24 of sensor goes up the equipartition and has a plurality of tension bolts to pass hole 25 and a plurality of tension bolts and round tube and pass hole 26, and the equipartition has a plurality of sensing spokes 28 (hereinafter referred to as spokes) between outer ring of sensor and the interior ring 27, and fig. 8 shows to be 4 spokes, also can be 8 or 12 etc.. The two ends of each spoke are respectively connected with the sensor outer circular ring 24 and the sensor inner circular ring 27, a space 29 is arranged between every two adjacent spokes, strain gauges are pasted on the two side surfaces of each spoke and used as sensitive stressed electronic devices for measuring the braking positive pressure of a lifter, or the strain gauges can be pasted on only one side surface of the spoke, and the ideal method is to paste the strain gauges on the two side surfaces. The four spokes are used as the attachment positions of the sensitive stressed electronic devices of the sensor to form a stressed sensitive area. If there are four spokes, the number of the strain gauges is 8, which are respectively R1, R2, R3, R4, R5, R6, R7 and R8, and the sticking positions are shown in FIG. 8 and FIG. 11. The sensor center is the installation space 31 of the miniature circuit board, the inner ring of the sensor is also provided with the inner wiring channel 38 of the sensor, and the outer ring is also provided with the signal line outlet 39 of the sensor for arranging signal lines, as shown in fig. 8 and 9.

As shown in fig. 5, the sensor is installed between the disc spring pad and the oil cylinder, and the sensor and the part of the outer circumference of the oil cylinder, which is in contact with the inner wall of the adjusting nut, are in sliding contact; the one side of definition sensor and butterfly spring pad contact is the leading flank, is the trailing flank with the one side of hydro-cylinder contact, and the data that the sensor detected when guaranteeing to open the floodgate is 0, and the sensor can detect braking normal pressure data when closing a floodgate, the utility model discloses as follows with the design of sensor trailing flank: the distance t1 between the sensor rear side first interface 32 (i.e. the rear side of the outer circular ring) and the cylinder front side first interface 33 is greater than 0, the distance t2 between the sensor rear side second interface 34 and the cylinder front side second interface 35 is greater than 0, the distance t3 between the sensor rear side third interface 36 (i.e. the rear side of the sensing spoke) and the cylinder front side third interface 37 is greater than 0, and the force load bearing interface 20 is formed by the sliding contact of the sensor rear side first interface and the adjusting nut, preferably, the value ranges of t1, t2 and t3 are 0.1-3.0mm, and t1, t2 and t3 may be equal or unequal.

The following describes the opening and closing processes of the intelligent brake in detail:

when the brake is opened, the brake shoe 5 needs to be separated from the brake disc I of the elevator, hydraulic oil provided by an elevator hydraulic station enters an inner cavity of the intelligent brake oil cylinder 16 from the oil inlet channel 7 of the oil cylinder to push the intelligent brake piston 15 to move towards the right, and the piston rod pushes the disc 11 to move towards the right; a plurality of tension bolts 13 are involved in the force transmission process, the disc and the cylinder are connected into a whole through the pretightening force of the tension bolt thread connected with the cylinder, and when the disc moves rightwards under the action of the piston, the cylinder with brake shoes connected with the disc through the pretightening force of the tension bolts also moves along the same direction of the disc, so that the disc spring is compressed to realize brake opening; the round tube 12 is used as an accurate limiting measure for the distance between the disc 11 and the cylinder 10 to form tight combination under the action of the pretightening force of the tension bolt, during the brake opening process, the disc springs are compressed, deformed and accumulated with force, the central shaft 14 tightly fixed in the middle of the cylinder 10 limits the dislocation movement of the disc springs, and the disc spring pads limit the total compression deformation of the disc springs. The force accumulated by the compression deformation of the disc spring is used as a condition for forming a braking positive pressure between the brake shoe 5 and the brake disc I during closing so as to form braking on the brake disc I of the running elevator when necessary.

When the brake is opened, the brake opening force after the disc spring is compressed is transmitted to the disc spring pad and the inner circular ring of the sensor through the disc spring and then borne by the middle part of the front side surface of the oil cylinder, and because three intervals t1, t2 and t3 exist between the rear side surface of the sensor and the front side surface of the oil cylinder, the rear side surface of the stress sensitive area of the sensor spoke is not contacted with the front side surface of the oil cylinder, the inner circular ring of the sensor is stressed and the sensing spoke and the outer circular ring are not stressed after the brake is opened, and therefore the force data detected by the sensor is 0.

When the intelligent brake is switched on, the brake shoe 5 is required to release braking positive pressure to the brake disc I of the elevator to form friction torque to promote the elevator to brake, at the moment, hydraulic oil in the inner cavity of the intelligent brake oil cylinder is discharged into a hydraulic station through the oil cylinder oil inlet channel 7, at the moment, the disc 11, the piston 15, the tensioning bolt 13, the circular pipe 12, the cylinder 10 and the brake shoe 5 slide to the left side in the outer shell 1 of the intelligent brake together, finally, the brake shoe 5 is tightly attached to the brake disc I to apply braking positive pressure to the brake disc I, and braking friction force is formed on the rotating brake disc under the action of friction coefficient, so that the elevator in operation is braked. When a brake positive pressure is applied to a brake disc I, according to a mechanical rule that the magnitude of an acting force and the reacting force are equal and the direction is opposite, the reacting force of the brake positive pressure applied to the brake disc I by a brake shoe 5 is transmitted to an inner ring on the front side surface of a sensor through a disc spring 6 and a disc spring pad 8 in a cylinder body 10, the acting force borne by the inner ring on the front side surface of the sensor is transmitted to a force load bearing interface 20 in contact with an adjusting nut through a spoke mechanics sensitive area (a strain gauge) of the sensor and an outer ring of the sensor and then borne by the adjusting nut, the adjusting nut transmits the complete force to an intelligent brake seat fixedly connected with an outer shell through the outer shell of the intelligent brake, finally the force is transmitted to the ground to form mechanical balance, the strain gauge on the sensor spoke senses a real load and then converts the real load into an electric signal, and the electric signal is transmitted to a computer to, the brake positive pressure is detected by a sensor.

FIG. 8 shows four spokes, each of which has two sides adhered with strain gauges, and has 8 strain gauges, wherein the strain gauges are R1, R2, R3, R4, R5, R6, R7 and R8, which are connected to the circuit of the computer according to the circuit connection shown in FIG. 12 for analysis and calculation, and display positive pressure value. The conversion from a strain signal to an electrical signal output is expressed in a formula as follows:

the wire grid resistance value of the strain gauge is expressed as R, and when the bonding position of the strain gauge generates slight strain due to stress, the output voltage variation of the bridge circuit is △ U_{Output of}And an input excitation voltage U_{Input device}The ratio of (A) to (B) has the following relation equation of △ U_{Output of}/U_{Input device}

＝((△R1+△R3)/(R1+R3)+(△R5+△R7)/(R5+R7)-(△R2+△R4)/(R2+R4)-(△R6+△R8)/(R6+R8))/4

The resistance values of the strain gauges are generally equal, i.e., R1, R2, R3, R4, R5, R6, R7, R8 △ U_{Output of}/U_{Input device}＝((△R1+△R3)+(△R5+△R7)-(△R2+△R4)-(△R6+△R8))/8R

In general, under the condition that a single strain gauge is stressed and strained, the change rate of the resistance value of the single strain gauge and the strain quantity of the strain gauge have the following relational equation:

△R/R＝K

where K is a sensitivity coefficient of the strain gauge, which is an inherent constant of a material of the strain gauge body, and is generally equal to 2 (dimensionless), R is a resistance value (ohm) of the strain gauge, and Δ R is a resistance variation (ohm) of the strain gauge, which is a strain amount (dimensionless) at a position where the strain gauge is attached.

The output electrical signal of the bridge (i.e. the variation △ U of the bridge output voltage)_{Output of}) The rate of change with respect to the input excitation voltage is calculated by the following equation:

△U_{output of}/U_{Input device}＝K((1+3+5+7)-(2+4+6+8))/8。

The strain gauge signal detection and conversion technology is the prior art and is not described in detail.

Further, the spokes of the present invention may be of the same width structure as shown in fig. 8, i.e. the width of the connection between the spokes and the outer ring of the sensor is equal to the width of the connection between the spokes and the inner ring of the sensor. Or the spokes can be in a non-uniform width structure, namely the width of the connecting part of the spoke and the sensor outer ring is not equal to the width of the connecting part of the spoke and the sensor inner ring, for example, the width of the connecting part of the spoke and the sensor outer ring is larger or smaller than the width of the connecting part of the spoke and the sensor inner ring to form a trapezoidal spoke. The D-D cross-sectional shape of the spokes is rectangular or square as shown in fig. 10.

The bonding form of the strain gauge is shown in fig. 11, and the included angle between the central axis of the strain gauge and the horizontal line of the lateral surface of the spoke is 45 degrees.

Further, when the braking torque detected by the sensor does not meet the specification, the opening gap needs to be adjusted. The adjustment of gap of opening the floodgate can let brake shoe 5 leave brake disc I back at intelligence floodgate switching-off, and adjusting nut has been realized through the screw thread relative position of rotatory regulation adjusting nut 9 and shell body coupling when not hard up unstressed state, specifically does: the special adjusting spanner frame is used for pulling the adjusting nut to rotate, the forward adjusting clearance is reduced, and the backward adjusting clearance is increased. After the brake shoe clearance is adjusted to be small, the brake positive pressure can be increased when the intelligent brake is switched on, and after the brake shoe clearance is adjusted to be large, the brake positive pressure can be reduced when the intelligent brake is switched on.

Intelligence floodgate arrange quantity on lifting machine system arresting gear look lifting load and confirm for the calculation foundation, the intelligence floodgate should be the symmetry and arrange in pairs on floodgate seat two sides, as shown in fig. 1. The utility model discloses intelligence floodgate sensor is forged by a whole steel and is beaten, rough machining, heat treatment, finish machining, wire-electrode cutting, electroplate, polish, circuit arrangement back formation finished product. The amplification circuit of the sensor can be mounted in the installation space 31 of the microcircuit board, or in the space 29 between two adjacent spokes, which space needs to be formed by cutting. The sensor signal wires pass through the sensor internal routing channel 38 and finally exit through the sensor signal wire exit 39.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any person skilled in the art can make some changes or modifications to equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all those simple modifications, equivalent changes and modifications made to the above embodiments by the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. A closed oil cylinder intelligent brake sensor for a hoist is arranged between a disc spring pad of an intelligent brake of the hoist and a closed intelligent brake oil cylinder, the intelligent brake comprises an outer shell, the tail part of the outer shell is in threaded connection with an adjusting nut, and the closed intelligent brake sensor is characterized in that the intelligent brake oil cylinder is arranged in the adjusting nut, and the outer circumferences of the intelligent brake sensor and the intelligent brake oil cylinder are in sliding contact with the inner wall of the adjusting nut; a plurality of sensing spokes are uniformly distributed between an outer ring and an inner ring of the intelligent brake sensor, two ends of each spoke are respectively connected with the outer ring and the inner ring of the sensor, a space is reserved between every two adjacent spokes, two side surfaces of each spoke are respectively stuck with a strain gauge for measuring the positive braking pressure of a lifter, and the center of the sensor is a miniature circuit board mounting space; a plurality of tensioning bolt through holes and a plurality of tensioning bolt and round pipe through holes are uniformly distributed on the outer circular ring of the sensor;

2. The closed cylinder intelligent brake sensor for the elevator as claimed in claim 1, wherein the number of the tension bolts passing through the holes is 4, 8 or 12, and the number of the tension bolts and the round pipe passing through the holes is 4.

3. The intelligent brake sensor for the closed cylinder of the hoist as claimed in claim 1, wherein the number of sensing spokes evenly distributed between the outer ring and the inner ring of the sensor is 4, 8 or 12.