Built-in moving shaft disc brake for monitoring braking positive pressure and monitoring method thereof

Abstract

The invention discloses a built-in moving shaft disc brake for monitoring braking positive pressure and a monitoring method thereof. The brake comprises a brake disc, a brake shoe, a lining plate, a barrel, a sealing ring, a disc spring set, a brake base, a dustproof ring, a disc spring base and an adjusting nut; a stepped blind hole with the large outside and the small inside is formed in the middle of the left side of the brake base; a barrel with the inner diameter and the outer diameter 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 base; a brake positive pressure sensor is arranged between the left end surface of the brake base and the adjusting nut or between the right end surface of the brake base and the lining plate; the monitored braking positive pressure F1 applied to the brake disc by the brake shoe is used as a basis for diagnosing faults and giving out control instructions, so that the braking performance, the safety and the reliability of the brake are greatly improved. The problems of jamming, shaft breakage and poor sealing performance of the disc brake of the elevator for several decades are fundamentally solved. The brake is simple in structure, convenient to operate and good in using effect.

Description

technical field [0001] The invention relates to a disc brake with a built-in moving shaft for monitoring the braking positive pressure and a monitoring method thereof, which is suitable for disc brakes of mine hoists and belt conveyors used in coal mines in harsh environments, and is also suitable for braking with other disc brakes. Monitoring of positive pressure. Background technique [0002] "Mine Hoist Troubleshooting and Technical Transformation" published in January 2005, page 93 Figure 4 The hydraulic cylinder rear-mounted disc brake shown in -5 has always been the traditional disc brake widely used in mine hoists and coal mine belt conveyors. During use, defects such as jamming, broken shafts, and poor sealing performance were found: ①In full-filled In the harsh environment of coal dust and oil sludge, the moving shaft of the external key on the lining plate with the cylinder connected to the brake shoe cannot be sealed, and a stuck fault often occurs; Faults that ...

AI Technical Summary

Problems solved by technology

[0002] "Mine Hoist Troubleshooting and Technical Transformation" published in January 2005, page 93 Figure 4 The hydraulic cylinder rear-mounted disc brake shown in -5 has always been the traditional disc brake widely used in mine hoists and coal mine belt conveyors. During use, defects such as jamming, broken shafts, and poor sealing performance were found: ①In full-filled In the harsh environment of coal dust and oil sludge, the moving shaft of the external key on the lining plate with the cylinder connected to the brake shoe cannot be sealed, and a stuck fault often occurs; Faults that cannot be opened; ③Three sealing rings, three-stage concentric often have oil leakage and jamming faults

[0003] Patent No. ZL200810155642.3 discloses a disc spring seat sensor for disc brakes to monitor the positive pressure of the brake. The disc body of the disc spring seat sensor monitors the disc spring force generated by the deformation of the disc spring, which does not mean that the brake shoe assembly is pressed to the brake. The brake positive pressure of the disc, when the oil pressure drops from the brake opening state to the residual oil pressure, the brake shoe assembly moves to the right under the action of the disc spring force and presses against the brake disc during the braking process, the disc spring force must overcome the disc spring hole , hydraulic cylinder and sealing ring, back cover and sealing ring, and brake seat jointly act on the three frictional forces of the brake shoe assembly and the residual oil pressure acting on the piston, and finally reduce the pressure of the brake shoe assembly to the brake disc Obviously, the disc spring force is greater than the brake positive pressure, and the brake positive pressure is not equal to the disc spring force. This patent mistakenly regards the disc spring force monitored by the disc spring seat sensor as the brake positive pressure. And as the basis for diagnosing the fault, there are great hidden dangers. The disc brake of the hoist with the disc spring seat sensor disc body installed, although the monitored disc spring force is greater than or equal to the allowable value of the brake positive pressure, there are cases of brake failure. Accidents, such as a disc brake of a mine inclined shaft hoist, should use a disc spring with an inner diameter of 72mm, but a disc spring with an inner diameter of 71mm is wrongly used. During the braking process, the disc spring hole acts on the friction force of the brake shoe assembly. If the disc spring force is greater than the disc spring force, the disc spring force does not push the brake shoe assembly to move to the right. The brake shoe is not pressed to the brake disc. The positive pressure of the brake is zero, and the brake failure leads to a major accident of the inclined shaft hoist. , but the disc spring force monitored by the disc spring seat sensor is equal to the friction force of the disc spring hole acting on the brake shoe assembly, which is very large and not equal to zero. There is no major fault in which the brake positive pressure is zero detected. The disc spring seat sensor disc What the body monitors is the disc spring force, not the brake positive pressure that the brake shoe presses on the brake disc. It cannot monitor the fault of insufficient brake positive pressure, and the monitored disc spring force is invalid.

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