CN112963475A - Built-in movable shaft disc type brake for monitoring positive braking pressure and monitoring method thereof - Google Patents
Built-in movable shaft disc type brake for monitoring positive braking pressure and monitoring method thereof Download PDFInfo
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- CN112963475A CN112963475A CN202110422486.8A CN202110422486A CN112963475A CN 112963475 A CN112963475 A CN 112963475A CN 202110422486 A CN202110422486 A CN 202110422486A CN 112963475 A CN112963475 A CN 112963475A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 239000000428 dust Substances 0.000 claims abstract description 10
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 25
- 239000003245 coal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000010742 number 1 fuel oil Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D2066/005—Force, torque, stress or strain
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a built-in movable shaft disc brake for monitoring brake positive pressure and a monitoring method thereof, wherein the brake comprises a brake disc, a brake shoe, a lining plate, a cylinder body, a sealing ring, a disc spring group, a brake seat, a dust ring, a disc spring seat and an adjusting nut, the middle part of the left side of the brake seat is provided with a stepped blind hole with a large outside and a small inside, the cylinder body with the inner and outer diameters matched with the stepped blind hole with the large outside and the small inside is arranged in the stepped blind hole, the lining plate and the brake shoe are arranged on the right side of the brake seat, a brake positive pressure sensor is arranged between the left end surface of the brake seat and the adjusting nut, or a brake positive pressure sensor; brake positive pressure F applied to the brake disc by the monitored brake shoe1The brake performance and the safety reliability of the brake are greatly improved as the basis for diagnosing faults and giving control commands. The problems of blocking, shaft breaking and poor sealing performance of the disc brake of the hoister for decades are fundamentally solved. The structure is simple, the operation is convenient, and the using effect is good.
Description
Technical Field
The invention relates to a built-in movable shaft disc brake for monitoring braking positive pressure and a monitoring method thereof, which are suitable for a disc brake of a mine hoist and a belt conveyor for coal mines used in severe environment and are also suitable for monitoring the braking positive pressure of other disc brakes.
Background
A hydraulic cylinder rear disc brake disclosed in page 93 of 'mine hoist fault treatment and technical improvement' published in 2005, fig. 4-5 always is a traditional disc brake widely used by mine hoists and belt conveyors for coal mines, and defects such as blockage, shaft breakage, poor sealing performance and the like are found in use: firstly, in a severe environment filled with coal dust and oil sludge, a moving shaft of an external key on a lining plate with a cylinder body and connected with a brake shoe cannot be sealed, and a blocking fault often occurs; secondly, a brake can not be opened due to the fact that a central shaft connected with a brake shoe is broken frequently; and oil leakage and blockage faults often occur in three sealing rings and three concentric stages.
The patent ZL200810155642.3 discloses a disc spring seat sensor for monitoring brake positive pressure of a disc brake, wherein a disc spring force generated by disc spring deformation is monitored by a disc spring seat sensor disc body and is not equal to the brake positive pressure when a brake shoe assembly presses a brake disc, when the oil pressure is reduced to residual oil pressure from an opening state, the brake shoe assembly moves rightwards under the action of the disc spring force and presses the brake disc in the braking process, the disc spring force overcomes three friction forces acted on the brake shoe assembly by a disc spring hole, a hydraulic cylinder and a sealing ring, a rear cover, the sealing ring and a brake seat together and the residual oil pressure acted on a piston and is finally reduced to the brake positive pressure at the terminal end when the brake shoe assembly presses the brake disc, obviously, the disc spring force is larger than the brake positive pressure and is not equal to the disc spring force, the disc spring force monitored by the disc spring seat sensor disc body is mistakenly used as the brake positive pressure and is used as the basis for, the hidden danger is very large, although the monitored disc spring force of the disc spring seat sensor disc brake is larger than or equal to the allowable value of the braking positive pressure, the accident of over-braking failure occurs, for example, the disc spring with the inner hole diameter of 72mm should be used in the disc brake of the inclined shaft elevator in a certain mine, but the disc spring with the inner hole diameter of 71mm is mistakenly used, the friction force of the disc spring hole acting on the brake shoe assembly in the braking process is larger than the disc spring force, the deadlocking fault that the disc spring force does not push the brake shoe assembly to move rightwards occurs, the brake shoe does not press the brake disc to brake the positive pressure to be zero, the braking failure causes the major accident of the inclined shaft elevator car running, but the disc spring force monitored by the disc spring seat sensor disc is equal to the friction force of the disc spring hole acting on the brake shoe assembly, is not greatly equal to zero, the major fault that the braking positive pressure is zero is not monitored, and the disc spring, rather than the brake positive pressure of the brake shoe pressing on the brake disc, the failure of insufficient brake positive pressure cannot be monitored, and the monitored disc spring force is invalid. When the open brake is opened, the brake shoe leaves the brake disc to keep a certain brake clearance, the brake positive pressure is zero, but the disc spring force is equal to the working oil pressure of the open brake, and the disc spring force monitored by the disc spring seat sensor body cannot diagnose the brake-unopened fault when the open brake is opened, so that the brake positive pressure when the brake shoe is pressed on the brake disc is monitored to be effective.
Disclosure of Invention
The technical problem is as follows: the invention aims to provide a built-in movable shaft disc type brake for monitoring the positive pressure of braking, which has a simple structure, is convenient to use, and is safe and effective, and a monitoring method thereof aiming at the defects in the prior art.
The technical scheme is as follows: the invention relates to a built-in movable shaft disc type brake for monitoring brake positive pressure, which comprises: the brake disc, the brake shoe, the lining plate, the barrel, the sealing ring, the disc spring set, the brake seat, the dust ring, the disc spring seat and the adjusting nut, wherein the middle part of the left side of the brake seat is provided with a stepped blind hole with a large outside and a small inside, a barrel body which is movably matched with the stepped blind hole with a large outside and a small inside is arranged in the stepped blind hole, a first guiding key is arranged on the barrel body at the position matched with the large outside of the brake seat, the barrel body at the position matched with the small inside of the brake seat is provided with the sealing ring, the cross section of the barrel body is in a 'towel' shape, an inner shaft at one opening end of the barrel body is provided with two stepped shafts with diameters, the disc spring set which is arranged and combined in pairs at the bowl connecting ports in the barrel body is sleeved on the stepped shaft, the disc spring seat which is sleeved on the stepped shaft and fixed on the brake seat is arranged at the outer side end of, a convex shaft at the non-opening end of the cylinder body is in movable fit with a blind hole of the brake seat, and a gap is reserved between the convex shaft and the bottom of the blind hole; a lining plate and a brake shoe are arranged on the right side of the brake seat, the lining plate is connected with the brake shoe in a dovetail groove mode, a brake positive pressure sensor is arranged between the left end face of the brake seat and the adjusting nut, or a brake positive pressure sensor is arranged between the right end face of the brake seat and the lining plate; the outer circumference of the brake seat is provided with a plurality of through holes, the through holes are internally provided with double-head screws for connection, and two ends of each double-head screw are square.
The brake positive pressure sensor arranged between the left end surface of the brake base and the adjusting nut is a convex cylindrical barrel sleeved on a barrel stepped shaft, the stepped shaft is in static fit with a hole of the brake positive pressure sensor, a key II is arranged at the fit position, a left annular groove and a right annular groove are symmetrically formed at the root part of the step of the convex disc cylindrical barrel, a plurality of strain gauges connected by signal lines are arranged in the left annular groove or the right annular groove, the thickness of the disc section at the position where the left annular groove and the right annular groove are opposite is 5-10mm, a plurality of square holes matched with the double-head screw rod are formed in the outer circumference of the convex disc cylindrical barrel, the left end square shaft of the double-head screw is connected with the left end square shaft of the double-head screw through a third screw, the right end square shaft of the double-head screw is directly connected with the square hole in the lining plate, and gaps are reserved between the left end surface of the brake base and the brake positive pressure sensor and between the right end surface of the brake base and the lining plate through fixation of the first screw.
The brake positive pressure sensor arranged between the right end surface of the brake seat and the lining plate comprises a step disc, the root part of the step disc is symmetrically provided with a left annular groove and a right annular groove, the left annular groove or the right annular groove is internally provided with a plurality of strain gauges connected by signal lines, the section thickness of the disc at the opposite position of the left annular groove and the right annular groove is 5-10mm, the inner end surface at the left side of the step disc is slightly higher than the outer end surface, the outer end surface at the right side of the step disc is slightly higher than the inner end surface, the inner end surface at the left side of the step disc is provided with a plurality of square holes matched with the right end of the double-end screw rod, the square holes are connected with the right end of the double-end screw rod through a screw I, the outer edge surface of the step disc is buckled in a connecting sleeve of the lining plate, the circumference of the outer end surface of the step disc, the outer circumference of the bearing plate is provided with a plurality of square holes connected with the left end of the double-end screw, the square holes are connected with the left end of the double-end screw through a third screw, and gaps are reserved between the left end surface of the brake seat and the bearing plate and between the brake seat and the braking positive pressure sensor.
The stepped shaft is in static fit with the hole of the bearing plate, and a key II is arranged at the fit position.
The plurality of strain gauges are 4-8 and are uniformly distributed on the bottom ring of the left annular groove or the right annular groove.
A monitoring method using the built-in movable-shaft disc brake for monitoring the brake positive pressure comprises the following steps: when braking, the bottom circular rings of the left and right circular grooves of the braking positive pressure sensor are in the position F1And F2Under the action of (A) to produce shear and bending deformation as strain regions, F1＝-F2，F1Proportional to the strain, the strain signals of multiple strain gauges are output to the upper computer via signal lines to monitor the brake positive pressure F in real time1The size of (d); brake positive pressure F applied to the brake disc by the monitoring brake shoe1The process of diagnosing faults and giving control commands is as follows:
opening a gate: after the oil pressure in a closing brake state is increased to the working oil pressure, the working oil pressure acting on a piston of the cylinder is used as a driving force, the disc spring group is continuously compressed by overcoming the resultant force of the disc spring force generated by the compression deformation of the disc spring group and the three friction forces, so that the brake shoe is moved away from the opening disc at the left side, and a brake clearance smaller than 2mm is kept adjusted by an adjusting nut; the three friction forces are friction forces between the hole and the dust ring of the disc spring group and the stepped shaft in the cylinder, between the sealing ring and the brake seat and the convex shaft of the cylinder, and between the large hole of the brake seat and the cylinder and between the key I;
the monitoring process before driving: if the brake is positive pressure F1If no fault is found, the driving is allowed;
if the brake is positive pressure F1Not equal to 0, if the brake is not opened, the vehicle is not allowed to be driven, and the vehicle can be driven after the fault is eliminated;
the monitoring process of the opening state: the brake disc rotating hoister is started when the brake disc is in positive pressure F1When the brake is not equal to 0, the brake application fault is diagnosed, the alarm is given in time, the safety brake is started, and the driving is allowed again after the fault is eliminated;
and (3) braking process: after the oil pressure is reduced to the residual oil pressure from the brake opening state, the disc spring force generated by the compression deformation of the disc spring group is used as a driving force, the resultant force of the residual oil pressure acting on a piston of the cylinder and three friction forces is overcome to push a brake shoe to move right to press a brake disc, wherein the residual oil pressure is equal to the oil pressure unloaded to the residual oil pressure during braking, and the residual pressure value is less than 0.5MPa, so that the closing brake is realized;
monitoring process before brake is finished and brake is reopened: if the brake is positive pressure F1If the brake positive pressure is greater than or equal to the allowable value of the brake positive pressure, the next driving is allowed; if the brake is positive pressure F1If the brake positive pressure is less than the allowable value of the brake positive pressure, the brake is opened after the next driving is locked and the fault is eliminated if the brake positive pressure is insufficient;
the process is circulated to monitor the brake positive pressure F in real time1The built-in movable shaft disc type brake can run safely and reliably.
Has the advantages that: due to the adoption of the technical scheme, the brake fundamentally solves the problems of blockage, shaft breakage and poor sealing performance of the traditional disc brake in the hoister and the belt conveyor for the coal mine for decades: in a severe environment filled with coal dust and oil sludge, a cylinder outer coarse shaft with a built-in key replaces a shaft with a cylinder liner plate with an external key, and a dust ring prevents the coal dust and the oil sludge from entering, so that the blocking fault of large holes of a brake seat and the outer coarse shaft of the cylinder is avoided; secondly, a plurality of external double-head screws replace a central shaft on a lining plate with a barrel to be connected with a brake shoe, so that the fault that the brake cannot be opened due to shaft breakage is avoided; and thirdly, one sealing ring on the piston of the cylinder body replaces three sealing rings of the piston, and the piston of the cylinder body and two shafts of the outer thick shaft move concentrically to replace three shafts of two shafts of the piston and a shaft with a lining plate of the cylinder body to move concentrically, so that oil leakage and blockage are effectively avoided.
The invention can effectively monitor the brake positive pressure F of the brake shoe pressed on the brake disc1The brake device corrects the error that the brake in the prior art wrongly monitors the disc spring force as the brake positive pressure when the brake shoe is pressed on the brake disc, because the disc spring force monitored by the disc spring seat sensor is not the brake positive pressure when the brake shoe is directly pressed on the brake disc, the disc spring force is equal to the brake positive pressure after the friction force and the residual pressure at four positions are subtracted, the disc spring force is larger than the brake positive pressure, and the disc spring force monitored by the disc spring seat sensor is wrongly monitored as the brake positive pressure hidden danger. The invention applies a positive braking pressure F of the monitored brake-shoe to the brake disc1As a basis for diagnosing faults and giving control instructions: before starting, if the starting is equal to zero, the starting is allowed, if the starting is not equal to zero, the fault that the brake is not opened is diagnosed, and the current starting is locked; when the brake is in operation, if the brake is not equal to zero, the brake application fault is diagnosed, and the safety brake is started; when braking, the braking positive pressure allowable value is larger than or equal to the braking positive pressure allowable value, the next driving is allowed, and when the braking positive pressure allowable value is smaller than the braking positive pressure allowable value, the braking positive pressure deficiency is diagnosed, and the next driving is locked. Thereby greatly improving the braking performance and the safety and the reliability of the brake. The novel multifunctional electric heating cooker is simple in structure, convenient to operate, good in using effect and wide in practicability in the technical field.
Drawings
Fig. 1 is a structure diagram of a closing braking state of a built-in movable-shaft disc brake for monitoring a brake positive pressure according to an embodiment of the present invention.
Fig. 2 is a diagram of an embodiment of the invention, wherein the brake-off state of the built-in movable-axle disc brake is monitored by monitoring the brake positive pressure.
Fig. 3 is a structure diagram of a closing braking state of the internal movable-shaft disc brake for monitoring a brake positive pressure according to a second embodiment of the present invention.
Fig. 4 is a structural diagram of an opening state of the built-in movable-shaft disc brake for monitoring the brake positive pressure according to the second embodiment of the invention.
In the figure: 1-brake disc, 2-brake shoe, 3-lining plate, 4-screw I, 5-cylinder, 6-sealing ring, 7-double-threaded screw, 8-key I, 9-disc spring group, 10-brake seat, 11-dust ring, 12-screw II, 13-disc spring seat, 14-screw III, 15-bearing plate, 16-brake positive pressure sensor, 16-1-strain gauge, 16-2-signal line, 17-screw IV, 18-adjusting nut, 19-key II, 20-screw V.
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
the invention relates to a built-in movable shaft disc type brake for monitoring brake positive pressure, which comprises: brake disc 1, brake shoe 2, lining board 3, barrel 5, sealing ring 6, disc spring group 9, brake seat 10, dust ring 11, disc spring seat 13 and adjusting nut 18, the middle part of the left side of the brake seat 10 is provided with a step blind hole with a large outside and a small inside, a movably matched barrel 5 with an inner diameter matched with the large outside and the small inside is arranged in the step blind hole, the barrel 5 at the matching position of the large outside diameter of the brake seat 10 is provided with a guiding key I8, the barrel 5 at the matching position of the small inside diameter of the brake seat 10 is provided with the sealing ring 6, the cross section of the barrel 5 is in a 'kerchief' shape, the inner shaft at the opening end of the barrel 5 is a step shaft with two diameters, the disc spring group 9 is sleeved on the step shaft and arranged and combined in pairs at the bowl connecting ports in the barrel, the disc spring seat 13 sleeved on the step shaft and fixed on the brake seat 10 is arranged at the outer side end of the disc spring group 9, the dust ring, the central hole of the adjusting nut 18 is in threaded connection with the head of the stepped shaft end to form a thread pair, a convex shaft at the non-open end of the cylinder 5 is in movable fit with the blind hole of the brake seat 10, and a gap is reserved between the convex shaft and the bottom of the blind hole; a lining plate 3 and a brake shoe 2 are arranged on the right side of the brake seat 10, the lining plate 3 and the brake shoe 2 are connected together in a dovetail groove mode, a brake positive pressure sensor 16 is arranged between the left end face of the brake seat 10 and an adjusting nut 18, or a brake positive pressure sensor 16 is arranged between the right end face of the brake seat 10 and the lining plate 3; the outer circumference of the brake seat 10 is provided with a plurality of through holes, the through holes are internally provided with double-head screws 7 which play a role in connection, and two ends of the double-head screws 7 are square.
According to the monitoring method of the built-in movable shaft disc type brake for monitoring the positive braking pressure, when braking is carried out, the bottom circular rings of the left and right annular grooves of the positive braking pressure sensor 16 are F1And F2Under the action of (A) to produce shear and bending deformation as strain regions, F1＝-F2，F1Proportional to the strain, the strain signals of a plurality of strain gauges 16-1 are output to an upper computer through a signal line 16-2, and the brake positive pressure F is monitored in real time1The size of (d); brake positive pressure F applied to brake disc 1 by monitoring brake shoe 21The process of diagnosing faults and giving control commands is as follows:
opening a gate: when the brake closing state is as shown in fig. 1 and fig. 3, after the oil pressure is increased to the working oil pressure, the working oil pressure acting on the piston of the cylinder 5 is used as the driving force, the disc spring group 9 is continuously compressed by overcoming the resultant force of the disc spring force generated by the compression deformation of the disc spring group 9 and the friction force of three positions, so that the brake shoe 2 is moved away from the brake opening disc 1 to the left, and the brake clearance which is set to be smaller than 2mm by the adjusting nut 18 is kept as shown in fig. 2 and fig. 4; the three friction forces are friction forces between the hole of the disc spring group 9, the dust ring 11 and the stepped shaft in the cylinder body 5, between the sealing ring 6, the brake seat 10 and the convex shaft of the cylinder body 5, and between the large hole of the brake seat 10 and the cylinder body 5 and the key I8;
the monitoring process before driving: if the brake is positive pressure F1If no fault is found, the driving is allowed;
if the brake is positive pressure F1Not equal to 0, if the brake is not opened, the vehicle is not allowed to be driven, and the vehicle can be driven after the fault is eliminated;
the monitoring process of the opening state: the brake disc (1) rotating elevator is started as shown in figure 2 and figure 4, when the brake positive pressure F1When the brake is not equal to 0, the brake application fault is diagnosed, the alarm is given in time, the safety brake is started, and the driving is allowed again after the fault is eliminated;
and (3) braking process: from the open state as shown in fig. 2 and fig. 4, after the oil pressure is reduced to the residual oil pressure, the disc spring force generated by the compression deformation of the disc spring set 9 is used as the driving force, the brake shoe 2 is pushed to move right to press the brake disc 1 by overcoming the resultant force of the residual oil pressure acting on the piston of the cylinder 5 and the three friction forces, wherein the residual oil pressure is equal to the oil pressure unloaded to the residual oil pressure during braking, the residual pressure value is less than 0.5MPa, and the closing brake is realized as shown in fig. 1 and fig. 3;
monitoring process before brake is finished and brake is reopened: if the brake is positive pressure F1If the brake positive pressure is greater than or equal to the allowable value of the brake positive pressure, the next driving is allowed; if the brake is positive pressure F1If the brake positive pressure is less than the allowable value of the brake positive pressure, the brake is opened after the next driving is locked and the fault is eliminated if the brake positive pressure is insufficient;
the process is circulated to monitor the brake positive pressure F in real time1The built-in movable shaft disc type brake can run safely and reliably.
The allowable value of the braking positive pressure is that according to the 426 th regulation of coal safety regulation, the ratio of the braking torque generated by the braking device to the actual maximum load lifting rotating torque is not less than 3, the braking torque is equal to 3 times of the actual maximum load lifting rotating torque, and the braking torque is divided by the friction coefficient and the braking radius to be the allowable value of the braking positive pressure.
In the first embodiment, as shown in fig. 1 and 2, the brake positive pressure sensor 16 disposed between the left end surface of the brake base 10 and the adjusting nut 18 is a convex cylindrical barrel sleeved on the stepped shaft of the barrel 5, the stepped shaft is in static fit with the hole of the brake positive pressure sensor 16, a second key 19 is disposed at the fit position, the root of the step of the convex cylindrical barrel is symmetrically provided with a left annular groove and a right annular groove, the left annular groove or the right annular groove is provided with a plurality of strain gauges 16-1 connected by a signal line 16-2, and the plurality of strain gauges 16-1 are 4-8 pieces and are uniformly distributed on the bottom ring of the left annular groove or the right annular groove. The thickness of the section of a disc at the opposite position of the left annular groove and the right annular groove is 5-10mm, a plurality of square holes matched with the double-threaded screw 7 are formed in the outer circumference of the convex disc column barrel and are connected with a left end square shaft of the double-threaded screw 7 through a third screw 14, a right end square shaft of the double-threaded screw 7 is directly connected with the square holes in the lining plate 3 and is fixed through a first screw 4, and gaps are reserved between the left end surface of the brake base 10 and the brake positive pressure sensor 16 and between the right end surface of the brake base 10 and the lining plate 3.
In a second embodiment, as shown in fig. 3 and 4, the brake positive pressure sensor 16 disposed between the right end surface of the brake base 10 and the lining plate 3 includes a stepped disk, a left annular groove and a right annular groove are symmetrically formed at the step root of the stepped disk, a plurality of strain gauges 16-1 connected by a signal line 16-2 are disposed in the left annular groove or the right annular groove, and the plurality of strain gauges 16-1 are 4-8 pieces and uniformly distributed on a ring at the bottom of the left annular groove or the right annular groove. The thickness of the section of the disc at the opposite position of the left annular groove and the right annular groove is 5-10mm, the left inner end face of the stepped disc is slightly higher than the outer end face, the right outer end face of the stepped disc is slightly higher than the inner end face, the left inner end face of the stepped disc is provided with a plurality of square holes matched with the right end of the double-end screw 7, the square holes are connected with the right end of the double-end screw 7 through a screw I4, the outer edge face of the stepped disc is buckled in a connecting sleeve of the lining plate 3, the circumference of the outer end face of the stepped disc is provided with a plurality of screw holes connected with the lining plate 3 and fixed through a screw V20, one side of the right end of the brake seat 10 is provided with a bearing plate 15 which is positioned on the stepped shaft of the barrel 5 and fixed with. A plurality of square holes connected with the left end of the double-end screw 7 are formed in the outer circumference of the bearing plate 15 and are connected with the left end of the double-end screw 7 through a third screw 14 in a shaft mode, and gaps are reserved between the left end face of the brake base 10 and the bearing plate 15 and between the brake base 10 and the brake positive pressure sensor 16.
Claims (6)
1. An internal moving-disc brake monitoring positive brake pressure, comprising: brake disc (1), brake shoe (2), welt (3), barrel (5), sealing washer (6), dish spring group (9), brake seat (10), dust ring (11), dish spring seat (13) and adjusting nut (18), its characterized in that: the brake seat is characterized in that a stepped blind hole with a large outside and a small inside is formed in the middle of the left side of the brake seat (10), a cylinder body (5) with a movable fit of which the inside and outside diameters are matched with the stepped blind hole with the large inside and the outside is arranged in the stepped blind hole, a guiding key I (8) is arranged on the cylinder body (5) at the position matched with the large outside diameter of the brake seat (10), a sealing ring (6) is arranged on the cylinder body (5) at the position matched with the small inside diameter of the brake seat (10), the section of the cylinder body (5) is in a shape like a Chinese character 'chang', an inner shaft at the opening end of the cylinder body (5) is a stepped shaft with two diameters, a disc spring group (9) which is formed by pairwise arranging and combining bowl connecting ports of the bowl ports in the cylinder body is sleeved on the stepped shaft, a disc spring seat (13) which is sleeved on the stepped shaft and fixed on the brake seat (10) is arranged at the outer side end of, a convex shaft at the non-opening end of the cylinder (5) is in movable fit with a blind hole of the brake seat (10), and a gap is reserved between the convex shaft and the bottom of the blind hole; a lining plate (3) and a brake shoe (2) are arranged on the right side of the brake seat (10), the lining plate (3) and the brake shoe (2) are connected together in a dovetail groove mode, a brake positive pressure sensor (16) is arranged between the left end face of the brake seat (10) and an adjusting nut (18), or a brake positive pressure sensor (16) is arranged between the right end face of the brake seat (10) and the lining plate (3); the outer circumference of the brake seat (10) is provided with a plurality of through holes, the through holes are internally provided with double-threaded screws (7) which play a role in connection, and two ends of each double-threaded screw (7) are square.
2. The internal mobile disc brake with positive brake pressure monitoring of claim 1, wherein: the brake positive pressure sensor (16) arranged between the left end surface of the brake seat (10) and the adjusting nut (18) is a convex cylindrical barrel sleeved on the stepped shaft of the barrel body (5), the stepped shaft is in static fit with the hole of the brake positive pressure sensor (16), a key II (19) is arranged at the matched position, the root part of the step of the convex cylindrical disk barrel is symmetrically provided with a left annular groove and a right annular groove, the left annular groove or the right annular groove is internally provided with a plurality of strain gauges (16-1) connected by a signal line (16-2), the cross section thickness of the disk at the opposite position of the left annular groove and the right annular groove is 5-10mm, the outer circumference of the convex cylindrical disk barrel is provided with a plurality of square holes matched with the double-head screw (7), the square holes are connected with the left end square shaft of the double-head screw (7) through a screw III (14), the right end square shaft of the double-head screw (7) is directly connected with the, fixed by a screw I (4), gaps are reserved between the left end surface of the brake seat (10) and the brake positive pressure sensor (16) and between the right end surface of the brake seat (10) and the lining plate (3).
3. The internal mobile disc brake with positive brake pressure monitoring of claim 1, wherein: the brake positive pressure sensor (16) arranged between the right end surface of the brake seat (10) and the lining plate (3) comprises a stepped disc, the root part of the step of the stepped disc is symmetrically provided with a left annular groove and a right annular groove, the left annular groove or the right annular groove is internally provided with a plurality of strain gauges (16-1) connected by signal lines (16-2), the thickness of the disc section at the position corresponding to the left annular groove and the right annular groove is 5-10mm, the inner end surface at the left side of the stepped disc is slightly higher than the outer end surface, the outer end surface at the right side of the stepped disc is slightly higher than the inner end surface, the inner end surface at the left side of the stepped disc is provided with a plurality of square holes matched with the right end of the double-end screw (7), the square holes are connected with the right end of the double-end screw (7) through a screw I (4), the outer edge surface of the stepped disc is buckled in a connecting sleeve of the, and is fixed by a fifth screw (20), one side of the right end of the brake seat (10) is provided with a bearing plate (15) which is positioned on the stepped shaft of the cylinder body (5) and is fixed with an adjusting nut (18) into a whole, the outer circumference of the bearing plate (15) is provided with a plurality of square holes connected with the left end of the double-end screw (7), the square holes are connected with the left end of the double-end screw (7) through a third screw (14), and gaps are reserved between the left end surface of the brake seat (10) and the bearing plate (15) and between the brake seat (10) and the braking positive pressure sensor (16).
4. A built-in mobile-disc brake monitoring positive brake pressure according to claim 3, wherein: the stepped shaft is in static fit with a hole of the bearing plate (15), and a second key (19) is arranged at the fit position.
5. A built-in mobile-disc brake monitoring positive brake pressure according to claim 2 or 3, characterized in that: the plurality of strain gauges (16-1) are 4-8 and are uniformly distributed on the bottom ring of the left annular groove or the right annular groove.
6. A monitoring method using the built-in mobile reel disc brake of claim 1, 2, 3 or 4 that monitors a brake positive pressure, characterized in that: when braking, the bottom circular rings of the left and right circular grooves of the braking positive pressure sensor (16) are F1And F2Under the action of (A) to produce shear and bending deformation as strain regions, F1＝-F2，F1Proportional to the strain, the strain signals of a plurality of strain gauges (16-1) are output to an upper computer through a signal line (16-2) to monitor the brake positive pressure F in real time1The size of (d); a brake positive pressure F, which is applied to the brake disc (1) by the monitoring brake shoe (2)1The process of diagnosing faults and giving control commands is as follows:
opening a gate: after the oil pressure in a closing brake state is increased to the working oil pressure, the working oil pressure acting on a piston of the cylinder body (5) is used as a driving force, the disc spring group (9) is continuously compressed by overcoming the resultant force of the disc spring force generated by the compression deformation of the disc spring group (9) and the friction force of three positions, so that the brake shoe (2) is moved away from the brake opening disc (1) to the left, and the brake clearance smaller than 2mm is kept adjusted by an adjusting nut (18); the three frictional forces are frictional forces between the hole of the disc spring group (9), the dust ring (11) and the stepped shaft in the cylinder body (5), between the sealing ring (6), between the brake seat (10) and the convex shaft of the cylinder body (5), and between the large hole of the brake seat (10) and the cylinder body (5) and the key I (8);
the monitoring process before driving: if the brake is positive pressure F1If no fault is found, the driving is allowed;
if the brake is positive pressure F1Not equal to 0, if the brake is not opened, the vehicle is not allowed to be driven, and the vehicle can be driven after the fault is eliminated;
the monitoring process of the opening state: the brake disc (1) rotates the hoist to start when the brake positive pressure F1When the brake is not equal to 0, the brake application fault is diagnosed, the alarm is given in time, the safety brake is started, and the driving is allowed again after the fault is eliminated;
and (3) braking process: after the oil pressure is reduced to the residual oil pressure from the brake-opening state, the disc spring force generated by the compression deformation of the disc spring group (9) is used as a driving force, the resultant force of the residual oil pressure acting on the piston of the cylinder body (5) and the three friction forces is overcome to push the brake shoe (2) to move right to press the brake disc (1), wherein the residual oil pressure is equal to the oil pressure unloaded to the residual oil pressure during braking, and the residual pressure value is less than 0.5MPa, so that the closing brake is realized;
monitoring process before brake is finished and brake is reopened: if the brake is positive pressure F1If the brake positive pressure is greater than or equal to the allowable value of the brake positive pressure, the next driving is allowed; if the brake is positive pressure F1If the brake positive pressure is less than the allowable value of the brake positive pressure, the brake is opened after the next driving is locked and the fault is eliminated if the brake positive pressure is insufficient;
the process is circulated to monitor the brake positive pressure F in real time1The built-in movable shaft disc type brake can run safely and reliably.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110422486.8A CN112963475B (en) | 2021-04-20 | 2021-04-20 | Built-in movable shaft disc brake for monitoring braking positive pressure and monitoring method thereof |
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| CN202110422486.8A CN112963475B (en) | 2021-04-20 | 2021-04-20 | Built-in movable shaft disc brake for monitoring braking positive pressure and monitoring method thereof |
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| CN112963475B CN112963475B (en) | 2024-06-18 |
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| CN112963475B (en) | 2024-06-18 |
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Effective date of registration: 20240521 Address after: 750400 Yongli Village, Ningdong Town, Lingwu City, Yinchuan City, Ningxia Hui Autonomous Region Applicant after: China ENERGY Group Ningxia Coal Industry Co., Ltd. Country or region after: China Applicant after: ETUOKEQIAN CHANGCHENG SANHAO MINING Co.,Ltd. Applicant after: SHIHAO COAL MINE, HENAN DAYOU ENERGY Co.,Ltd. Applicant after: INNER MONGOLIA SHANGHAIMIAO MINING INDUSTRY Co.,Ltd. Applicant after: XUZHOU DAHENG MEASUREMENT & CONTROL TECHNOLOGY Co.,Ltd. Address before: 221000 No.8 Huaxia Road, Tongshan New District, Xuzhou City, Jiangsu Province Applicant before: XUZHOU DAHENG MEASUREMENT & CONTROL TECHNOLOGY Co.,Ltd. Country or region before: China |
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