CN112963474A - Disk brake with seat type sensor for monitoring braking positive pressure and monitoring method thereof - Google Patents

Abstract

A disk brake for monitoring the positive braking pressure by seat-type sensor is composed of brake disk, cylinder of brake shoe, brake seat, disk spring group, hydraulic cylinder, piston, regulating screw, back cover and liner plate₁And F₂Under the action of (A) to produce shear and bending deformation as strain regions, 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); according to F₁Diagnosing faults and giving control instructions: before starting, the vehicle is allowed to be started when the vehicle is equal to zero, and the vehicle is locked and started at the next time when the fault is not opened when the diagnosis brake is not equal to zero; when the brake is operated, the brake application fault which is not equal to zero diagnosis starts the safety brake; when braking, the allowable value more than or equal to the braking positive pressure allows the next driving, the allowable value less than the braking positive pressure diagnoses the failure of insufficient braking positive pressure, the next driving is locked, and the braking of the disc brake is greatly improvedAnd (5) effect.

Description

Disk brake with seat type sensor for monitoring braking positive pressure and monitoring method thereof

Technical Field

The invention relates to a disc brake with a seat type sensor for monitoring the braking positive pressure, which is particularly suitable for monitoring the braking positive pressure of the disc brake of a mine hoist and a belt conveyor and is also suitable for monitoring the braking positive pressure of other disc brakes.

Background

The patent ZL 200810155642.3 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, after 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 the disc spring hole, a hydraulic cylinder, a sealing ring, a rear cover, the sealing ring and a brake seat, and finally reduces the brake positive pressure to the final brake positive pressure when the brake shoe assembly presses the brake disc after the friction force of the brake shoe assembly and the residual oil pressure acting on a piston are jointly acted, 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, 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 disc body can not diagnose the brake-unopened fault when the open brake is opened.

It is therefore stated that it is only effective to monitor the brake positive pressure with which the brake shoes are pressed against the brake disc, for which purpose a disc brake is invented that monitors the brake positive pressure with which the brake shoes are pressed against the brake disc.

Disclosure of Invention

The technical problem is as follows: the invention aims to provide a brake with a seat type sensor for monitoring the positive braking pressure when a brake shoe is pressed on a brake disc and a monitoring method thereof aiming at the defects in the prior art.

The technical scheme is as follows: the invention relates to a disk brake with a seat type sensor for monitoring brake positive pressure, which comprises: the brake comprises a brake disc, a brake shoe, a cylinder body, a brake seat, a disc spring group, a hydraulic cylinder, a first sealing ring, a piston, a second sealing ring, an adjusting screw, a rear cover, a third screw and a lining plate, wherein one side of the cylinder body is sleeved on the brake seat in a movable fit manner, the brake shoe is a stepped disc, a left annular groove and a right annular groove are symmetrically formed in the outer circumference of the two end faces of the stepped disc, a plurality of strain gauges connected through signal lines are arranged in the left annular groove or the right annular groove, the thickness of the section of the disc at the position, corresponding to the left annular groove and the right annular groove, of the stepped disc is 5-10mm, the left inner end face of the stepped disc is slightly higher than the outer end seat face, the right inner end face of the stepped disc is slightly lower than the outer end face, the outer end face on the right side of the seated brake positive pressure sensor is fixedly connected with a lining plate, and the lining plate and a brake shoe are connected into a whole through a dovetail groove.

The plurality of strain gauges are 4-8 and are uniformly distributed on the circular ring at the bottom of the left annular groove or the right annular groove.

The cylinder body is a pipe body, the middle part of a seat type braking positive pressure sensor connected with the cylinder body is sequentially provided with an outer hole, a middle hole and an inner hole, a T-shaped connecting rod which is on the same axis with the cylinder body is arranged in the cylinder body, a disc spring group is sleeved on the T-shaped connecting rod, the front part of the T-shaped connecting rod penetrates through the middle hole of the seat type braking positive pressure sensor to be buckled and connected with a piston and is fixed by a screw III, the tail part of the T-shaped connecting rod is matched with and fixedly connected with the outer hole of the seat type braking positive pressure sensor, and the inner hole of the seat type braking positive pressure sensor is sleeved and.

The drum body is a flat-bottom sleeve with a central column, the flat-bottom sleeve and the seat type braking positive pressure sensor are of an integrated structure, the seat type braking positive pressure sensor is located at the bottom of the flat-bottom sleeve, the end face fixedly connected with the lining plate is slightly higher than the bottom end face of the flat-bottom sleeve, the disc spring group is sleeved in the flat-bottom sleeve, and the head of the central column in the flat-bottom sleeve is connected with the piston in a buckling mode and is fixed through a screw.

The cylinder body is a convex bottom sleeve with a central column, the middle part of a seat type braking positive pressure sensor connected with the cylinder body is provided with an outer hole and an inner hole, the inner hole of the seat type braking positive pressure sensor is sleeved on the convex bottom of the cylinder body and fixed by a screw, the excircle end surface of the seat type braking positive pressure sensor is buckled in a connecting sleeve of a lining plate and fixed by a screw, a disc spring group is sleeved in the convex bottom sleeve, and the head part of the central column in the convex bottom sleeve is buckled and connected with a piston and fixed by a screw III.

When the monitoring method of the disc brake for monitoring the braking positive pressure by using the seat type sensor is used for braking, the bottom circular rings of the left and right annular grooves of the seat type braking positive pressure sensor are F₁And F₂Under the action of (A) to produce shear and bending deformation as strain regions, 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 is increased to the working oil pressure from the closing brake state, the working oil pressure acting on the piston overcomes the resultant force of the disc spring force generated by the compression deformation of the disc spring group and the friction force at four positions to continuously compress the disc spring group, so that the brake shoe is moved away from the opening disc at the left side, and the brake clearance smaller than 2mm is kept adjusted by the adjusting screw;

the monitoring process before driving: monitoring brake positive pressure F by seat type brake positive pressure sensor₁If the braking is positive pressure F₁If no fault is found, the driving is allowed; if the brake is positive pressure F₁Not equal to 0, if the diagnosis brake is not opened, the vehicle is not allowed to be driven, and the vehicle can be driven after the fault is eliminated;

in the process of monitoring the brake opening state, the brake disc rotating hoister is driven, and meanwhile, the seat type brake positive pressure sensor monitors the brake positive pressure F₁When the brake is positive 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;

in the 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 overcomes the resultant force of the residual oil pressure acting on the piston and the friction force at four positions to push the brake shoe to move right to press the brake disc, so that the closing brake is realized;

the monitoring process before brake opening is finished, and the seat type brake positive pressure sensor monitors the brake positive pressure F₁If the braking is positive 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 fault is smaller than the allowable value of the braking positive pressure, the fault of insufficient braking positive pressure is diagnosed, the next driving is alarmed and locked, and the brake is opened after the hidden trouble of the fault is eliminated;

the process is circulated to monitor the brake positive pressure F in real time₁The disc brake can run reliably.

Has the advantages that: due to the adoption of the technical scheme, the brake can accurately monitor the brake positive pressure F of the brake shoe pressed on the brake disc₁Solves the problem that the brake in the prior art can not monitor the brake positive pressure F of the brake shoe pressed on the brake disc₁Since the disc spring force monitored by the disc spring seat sensor in the existing brake is not the brake positive pressure F that the brake shoe is directly pressed on the brake disc₁When braking, the disc spring force subtracts four friction forces and residual pressure to equal the braking positive pressure F₁The disc spring force is greater than the braking positive pressure F₁The hidden danger that the disc spring force monitored by the disc spring seat sensor disc body is mistakenly taken as the brake positive pressure is very large. The invention takes the brake positive pressure applied by the monitored brake shoe to the brake disc as the 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 is not opened by the diagnosis brake, 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 brake positive pressure allowable value is larger than or equal to the brake positive pressure allowable value, the next driving is allowed, the brake positive pressure insufficient fault is diagnosed when the brake positive pressure allowable value is smaller than the brake positive pressure allowable value, the next driving is locked, and the brake effect of the disc brake is greatly improved.

Drawings

Fig. 1 is a structural diagram of a closing brake state of a disc brake in which a seat sensor monitors a brake positive pressure according to a first embodiment of the present invention.

Fig. 2 is a structural diagram of an opening state of the disc brake in which the seat sensor monitors the brake positive pressure according to the first embodiment of the invention.

Fig. 3 is a structural diagram of a closing brake state of the disc brake in which the seating sensor monitors a brake positive pressure according to the second embodiment of the present invention.

Fig. 4 is a structural diagram of an open state of the disc brake in which the seating sensor monitors the brake positive pressure according to the second embodiment of the invention.

Fig. 5 is a structural diagram of a closing brake state of the disc brake in which the seating sensor monitors a brake positive pressure according to a third embodiment of the present invention.

Fig. 6 is a structural diagram of an open state of the disc brake in which the seat sensor monitors the brake positive pressure according to the third embodiment of the invention.

In the figure: 1-brake disc; 2, brake shoe; 3, a first screw; 4, a second screw; 5-seat type braking positive pressure sensor; 5-1-strain gage; 5-2-signal line; 6-bond one; 7-bond two; 8, a cylinder body; 9-a brake seat; 10-disc spring group; 11-a hydraulic cylinder; 12-a first sealing ring; 13-a piston; 14, sealing ring II; 15-adjusting screws; 16-rear cover; 17-screw III; 18-a T-shaped link; 19-screw four; 20-lining board; 21-guide key.

Detailed Description

The invention will be further described with reference to examples in the drawings to which:

according to the monitoring method of the disc brake for monitoring the braking positive pressure by the seat type sensor, when the disc brake is braked, the bottom circular rings of the left and right annular grooves of the seat type braking positive pressure sensor 5 are F₁And F₂Under the action of (A) to produce shear and bending deformation as strain regions, F₁Proportional to the strain, the strain signals of a plurality of strain gauges 5-1 are output to an upper computer through a signal line 5-2, and the braking 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: after the oil pressure is increased to the working oil pressure from the closing brake state, the working oil pressure acting on the piston 13 overcomes the resultant force of the disc spring force generated by the compression deformation of the disc spring group 10 and the friction force at four positions to continuously compress the disc spring group 10, so that the brake shoe 2 is moved away from the opening disc 1 to the left, and the brake clearance smaller than 2mm is kept adjusted by the adjusting screw 15;

the monitoring process before driving: monitoring of the brake positive pressure F by means of a seat-type brake positive pressure sensor 5₁If the braking is positive pressure F₁If no fault is found, the driving is allowed; if the brake is positive pressure F₁Not equal to 0, if the diagnosis brake is not opened, the vehicle is not allowed to be driven, and the vehicle can be driven after the fault is eliminated;

in the process of monitoring the brake opening state, the brake disc 1 rotates to hoist to drive, and meanwhile, the seat type brake positive pressure sensor 5 monitors the brake positive pressure F₁When is coming into contact withBrake 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;

in the 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 10 overcomes the resultant force of the residual oil pressure acting on the piston 13 and the friction force at four positions to push the brake shoe 2 to move right to press the brake disc 1, so that the closing brake is realized;

the monitoring process before the brake is closed and then opened is finished, and the seat type brake positive pressure sensor 5 monitors the brake positive pressure F₁If the braking is positive 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 fault is smaller than the allowable value of the braking positive pressure, the fault of insufficient braking positive pressure is diagnosed, the next driving is alarmed and locked, and the brake is opened after the hidden trouble of the fault is eliminated;

the process is circulated to monitor the brake positive pressure F in real time₁The disc brake can run 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.

Embodiment one, as shown in fig. 1 and fig. 2, a disc brake with a seat type sensor for monitoring braking positive pressure mainly comprises a brake disc 1, a brake shoe 2, a cylinder 8, a brake seat 9, a disc spring group 10, a hydraulic cylinder 11, a first seal ring 12, a piston 13, a second seal ring 14, an adjusting screw 15, a rear cover 16, a third screw 17, a T-shaped connecting rod 18 and a lining plate 20, wherein one side of the cylinder 8 is movably fitted on the brake seat 9, a guide key 21 is arranged at the fitting position and connected with the piston 13, the other side of the cylinder is connected with the seat type braking positive pressure sensor 5, the seat type braking positive pressure sensor 5 is a stepped disc, a left annular groove and a right annular groove are symmetrically formed in the outer circumference of the two end faces of the stepped disc, a plurality of strain plates 5-1 connected by signal lines 5-2 are arranged on an annular ring at theThe signal is output through the signal line 5-2. The strain gauges 5-1 are 4-8 and are uniformly distributed on the circular 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 not less than 5mm, and the value is 5-10mm according to the diameter of the disc. The inner end face on the left side of the stepped disc is slightly higher than the outer end seat face, the inner end face on the right side of the stepped disc is slightly lower than the outer end face, the outer end face on the right side of the seat type braking positive pressure sensor 5 is fixedly connected with the lining plate 20 through a screw I3, and the lining plate 20 and the brake shoe 2 are connected into a whole through a dovetail groove. The seat type brake positive pressure sensor 5 and the brake shoe 2 are connected into the same component, and the brake disc 1 is monitored to apply brake positive pressure F to the brake shoe 2₁(ii) a The cylinder 8 is a tube body, the middle part of the seat type braking positive pressure sensor 5 connected with the cylinder 8 is sequentially provided with an outer hole, a middle hole and an inner hole, a T-shaped connecting rod 18 which is coaxial with the cylinder is arranged in the cylinder 8, a disc spring group 10 is sleeved on the T-shaped connecting rod 18, the front part of the T-shaped connecting rod 18 penetrates through the middle hole of the seat type braking positive pressure sensor 5 to be buckled and connected with a piston 13 and is fixed through a plurality of screws III 17, the tail part of the T-shaped connecting rod 18 is matched with the outer hole of the seat type braking positive pressure sensor 5 and is fixedly connected through a plurality of screws IV 19, a key II 7 is arranged at the matching position, and the inner hole of the seat type braking positive pressure sensor 5 is sleeved and buckled on the outer end face of. The bottom circular rings of the left and right annular grooves of the seat type braking positive pressure sensor 5 are arranged at F₁And F₂Is a strain zone, F₁Proportional to the strain, multiple strain gauges 5-1 connected by signal line 5-2 are arranged on the bottom ring of the left annular groove, the strain signal is output to an upper computer through the signal line 5-2, and the braking positive pressure F is monitored in real time₁The size of (2). When braking, the outer circular ring end surface of the right annular groove of the seat type braking positive pressure sensor 5 bears the braking positive pressure F acted by the brake disc 1 to the brake shoe 2 and the lining plate 20₁The inner end surface of the left annular groove bears the resultant force F of the disc spring force, the four friction forces and the residual oil pressure₂The friction force at four positions is a total of a disc spring group 10, a brake seat 9, a hydraulic cylinder 11, a first sealing ring 12, a rear cover 16 and a second sealing ring 14 which sequentially act on a T-shaped connecting rod 18, a cylinder body 8, a piston 13, a small shaft and a large shaftFriction force, the residual oil pressure is equal to the oil pressure unloaded to the residual oil pressure during braking, the residual oil pressure value is less than 0.5MPa, F₁＝-F₂The bottom thickness and width of the left and right annular grooves are according to F₁Is determined.

In a disc brake implementing the seat type sensor monitoring the brake positive pressure as shown in fig. 3 and fig. 4, the main structure is basically the same as that of the first embodiment, and the same points are omitted. The difference is as follows: the cylinder body 8 is a flat-bottom sleeve with a central column, the flat-bottom sleeve and the seat type braking positive pressure sensor 5 are of an integrated structure, the seat type braking positive pressure sensor 5 is located at the bottom of the flat-bottom sleeve, the end face fixedly connected with the lining plate 20 is slightly higher than the bottom end face of the flat-bottom sleeve, the disc spring group 10 is sleeved in the flat-bottom sleeve, and the head of the central column in the flat-bottom sleeve is connected with the piston 13 in a buckling mode and is fixed through a screw III 17. When braking, the end surface of the outer circular ring of the right annular groove bears the braking positive pressure F acted by the brake disc 1 through the brake shoe 2 and the lining plate 20₁The inner end surface of the left annular groove bears the resultant force F of the disc spring force, the four friction forces and the residual oil pressure₂The four friction forces are the friction forces of the disc spring group 10, the brake seat 9, the hydraulic cylinder 11, the first sealing ring 12, the rear cover 16 and the second sealing ring 14 which are respectively acted on the inner shaft and the outer shaft of the cylinder 8 and the small shaft and the large shaft of the piston 13, the residual oil pressure is equal to the oil pressure unloaded to the residual oil pressure during braking, the residual oil pressure value is less than 0.5MPa, F is₁＝-F₂The bottom thickness and width of the left and right annular grooves are according to F₁Is determined.

Third embodiment, as shown in fig. 5 and fig. 6, a disc brake with an anchor sensor for monitoring the brake positive pressure has a main structure that is basically the same as the first embodiment, and the same points are omitted. The difference is as follows: the cylinder body 8 is a convex bottom sleeve with a central column, the middle part of a seat type braking positive pressure sensor 5 connected with the cylinder body 8 is provided with an outer hole and an inner hole, the inner hole of the seat type braking positive pressure sensor 5 is sleeved on the convex bottom of the cylinder body 8 and is fixed by a screw, the excircle end surface of the seat type braking positive pressure sensor 5 is buckled in a connecting sleeve of a lining plate 20 and is fixed by a screw, a disc spring group 10 is sleeved in the convex bottom sleeve, the head part of the central column in the convex bottom sleeve and a movable sleeve are arranged in the connecting sleeve of the lining plate 20The plug 13 is snap-fitted and fixed by a third screw 17. When braking, the end surface of the outer circular ring of the right annular groove bears the braking positive pressure F acted by the brake disc 1 through the brake shoe 2 and the lining plate 20₁The end face of the inner ring of the left annular groove bears the resultant force F of the disc spring force, the four friction forces and the residual oil pressure₂The four friction forces are the friction forces of the disc spring group 10, the brake seat 9, the hydraulic cylinder 11, the first sealing ring 12, the rear cover 16 and the second sealing ring 14 which are respectively acted on the inner shaft and the outer shaft of the cylinder 8 and the small shaft and the large shaft of the piston 13, the residual oil pressure is equal to the oil pressure unloaded to the residual oil pressure during braking, the residual oil pressure value is less than 0.5MPa, F is₁＝-F₂The bottom thickness and width of the left and right annular grooves are according to F₁Is determined.

Claims (6)

1. A disc brake with an applied sensor monitoring positive brake pressure, comprising: brake disc (1), brake shoe (2), barrel (8), brake seat (9), dish spring group (10), pneumatic cylinder (11), sealing washer (12), piston (13), sealing washer two (14), adjusting screw (15), back lid (16), three (17) of screw and welt (20), its characterized in that: one side of the cylinder body (8) is sleeved on the brake seat (9) in a movable fit manner and is connected with the piston (13), the other side of the cylinder body is connected with a seat type brake positive pressure sensor (5), the seat type brake positive pressure sensor (5) is a stepped disc, a left annular groove and a right annular groove are symmetrically formed in the outer circumference of the two end faces of the stepped disc, a plurality of strain gauges (5-1) connected through signal lines (5-2) are arranged in the left annular groove or the right annular groove, the thickness of the disc section at the position, opposite to the left annular groove and the right annular groove, of the left annular groove is 5-10mm, the left inner end face of the stepped disc is slightly higher than the outer end seat face, the right inner end face of the right side is slightly lower than the outer end face, the outer end face on the right side of the seat type brake positive pressure sensor (5) is fixedly connected with a lining plate (20), and the lining plate (20) and a.

2. A disc brake with an applied sensor monitoring positive brake pressure according to claim 1, wherein: the strain gauges (5-1) are 4-8 and are uniformly distributed on the circular ring at the bottom of the left annular groove or the right annular groove.

3. A disc brake with an applied sensor monitoring positive brake pressure according to claim 1, wherein: the cylinder body (8) is a pipe body, the middle part of a seat type braking positive pressure sensor (5) connected with the cylinder body (8) is sequentially provided with an outer hole, a middle hole and an inner hole, a T-shaped connecting rod (18) which is on the same axis with the cylinder body is arranged in the cylinder body (8), a disc spring group (10) is sleeved on the T-shaped connecting rod (18), the front part of the T-shaped connecting rod (18) penetrates through the middle hole of the seat type braking positive pressure sensor (5) to be buckled and connected with a piston (13) and is fixed through a screw III (17), the tail part of the T-shaped connecting rod (18) is matched and fixedly connected with the outer hole of the seat type braking positive pressure sensor (5), and the inner hole of the seat type braking positive pressure sensor (5) is sleeved on the outer end face of the.

4. A disc brake with an applied sensor monitoring positive brake pressure according to claim 1, wherein: the drum body (8) is a flat-bottom sleeve with a central column, the flat-bottom sleeve and the seat type braking positive pressure sensor (5) are of an integrated structure, the seat type braking positive pressure sensor (5) is located at the bottom of the flat-bottom sleeve, the end face fixedly connected with the lining plate (20) is slightly higher than the bottom end face of the flat-bottom sleeve, the disc spring group (10) is sleeved in the flat-bottom sleeve, and the head of the central column in the flat-bottom sleeve is connected with the piston (13) in a buckling mode and is fixed through a screw III (17).

5. A disc brake with an applied sensor monitoring positive brake pressure according to claim 1, wherein: the cylinder body (8) is a convex bottom sleeve with a central column, the middle part of a seat type braking positive pressure sensor (5) connected with the cylinder body (8) is provided with an outer hole and an inner hole, the inner hole of the seat type braking positive pressure sensor (5) is sleeved on the convex bottom of the cylinder body (8) and is fixed by screws, the excircle end surface of the seat type braking positive pressure sensor (5) is buckled in a connecting sleeve of a lining plate (20) and is fixed by screws, a disc spring group (10) is sleeved in the convex bottom sleeve, the head part of the central column in the convex bottom sleeve is buckled and connected with a piston (13) and is fixed by a screw III (17).

6. A method of monitoring a disc brake using an seating sensor according to claim 1 or 2 to monitor a positive brake pressure, characterized by: when braking, the bottom circular rings of the left and right circular grooves of the seat type braking positive pressure sensor (5) are positioned at F₁And F₂Under the action of (A) to produce shear and bending deformation as strain regions, F₁Proportional to the strain, the strain signals of a plurality of strain gauges (5-1) are output to an upper computer through a signal line (5-2) 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 is increased to the working oil pressure from a closing brake state, the working oil pressure acting on the piston (13) overcomes the resultant force of the disc spring force generated by the compression deformation of the disc spring group (10) and the friction force at four positions to continuously compress the disc spring group (10), so that the brake shoe (2) is moved away from the opening disc (1) to the left, and the brake clearance smaller than 2mm is kept adjusted by an adjusting screw (15);

the monitoring process before driving: monitoring the brake positive pressure F by a seat type brake positive pressure sensor (5)₁If the braking is positive pressure F₁If no fault is found, the driving is allowed; if the brake is positive pressure F₁Not equal to 0, if the diagnosis brake is not opened, the vehicle is not allowed to be driven, and the vehicle can be driven after the fault is eliminated;

in the process of monitoring the brake opening state, the brake disc (1) rotates the hoist to drive, and meanwhile, the seat type brake positive pressure sensor (5) monitors the brake positive pressure F₁When the brake is positive 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;

in the 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 (10) overcomes the resultant force of the residual oil pressure acting on the piston (13) and the friction force at four positions to push the brake shoe (2) to move right to press the brake disc (1), so that the closing brake is realized;

the monitoring process before the brake is opened after the brake is finished, and the seat type brake positive pressure sensor (5) monitors the brake positive pressure F₁If brakingPositive 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 fault is smaller than the allowable value of the braking positive pressure, the fault of insufficient braking positive pressure is diagnosed, the next driving is alarmed and locked, and the brake is opened after the hidden trouble of the fault is eliminated;

the process is circulated to monitor the brake positive pressure F in real time₁The disc brake can run reliably.

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