A method for treating oil leakage of a safety disc brake for an aerial passenger conveyor

Abstract

The application provides a leakage oil treatment method for a safety disc brake of an aerial passenger device, which mainly adds a structure for preventing oil leakage on a piston and a cylinder cover, and cooperates with a cylinder to collect the leakage oil, so as to solve the problem that the brake slips and loses braking force when working due to the leakage of pressure oil on the brake disc; the application sets an oil inlet leakage oil collection pool on the piston to collect the leakage oil at the oil inlet, sets an oil seal leakage isolation groove to accumulate the leakage oil, sets a residual oil pool on the cylinder cover to collect the leakage oil at the oil seal, and cooperates with the cylinder to discharge the leakage oil without contaminating the brake disc, so that the safety disc brake of the aerial passenger device cannot lose braking force due to the overflow of the leakage oil; and the application realizes the safety disc brake of the aerial passenger device without leakage and with high reliability by using a smaller cost.

Description

Technical Field

[0001] This invention belongs to the field of safety protection technology for mining transportation equipment, specifically relating to a method for treating oil leakage from a safety control panel for an overhead passenger transport device. Background Technology

[0002] Aerial passenger transport systems are currently the main equipment for transporting personnel in coal mines. Their safety is directly related to the lives of underground workers, and the most critical aspect is the reliability of their control system in the event of a safety malfunction. The braking system of aerial passenger transport systems in coal mines mainly consists of a working brake and a safety brake. The working brake is a holding brake on the motor output shaft, while the safety brake is a wheel-side brake on the drive wheels. Currently, almost all existing safety braking devices for aerial passenger transport systems in coal mines use traditional, fail-safe wheel-side brakes. These brakes are slow to operate, have long response times, and outdated control measures, which can lead to numerous safety accidents and cannot meet the high safety and reliability requirements of on-site operations.

[0003] With the gradual improvement of production efficiency and personal safety, disc brakes with high safety and reliability are increasingly being proposed for aerial passenger transport vehicles, along with new methods for multi-stage braking and intelligent constant deceleration control of these brakes. Disc brakes used in aerial passenger transport vehicles are mounted vertically on brake discs next to the horizontally positioned drive wheels. Any leakage of pressurized hydraulic fluid from the brakes above the discs can cause slippage and loss of braking force during operation, potentially leading to accidents and posing a serious threat to the safety of passengers. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention proposes a method for handling oil leakage in a safety disc brake for an aerial passenger vehicle. The purpose is to solve the problem of brake slippage and loss of braking force caused by pressurized oil leaking onto the brake disc by adding a structure to the piston and cylinder cover to prevent oil leakage and connecting it with the cylinder to collect the leaked oil.

[0005] The technical solution adopted by the present invention for treating oil leakage from a safety control panel for an aerial passenger transport device includes:

[0006] (1) When the safety-type disc brake is installed above the brake disc, the leaking oil at the piston inlet flows into the inlet leakage collection pool and then flows into the oil seal leakage isolation groove through the piston oil collection inlet and piston oil collection outlet; while the leaking oil between the piston outer wall and the oil seal passes over the oil seal leakage isolation platform and enters the oil seal leakage isolation groove; when the oil level of the leaking oil in the oil seal leakage isolation groove accumulates to the height of the residual oil port at the waist of the cylinder head, it is then introduced into the external residual oil collector through the residual oil port at the waist of the cylinder head and the residual oil port of the cylinder in sequence.

[0007] (2) When the safety-type disc gate is located below the gate, the leaking oil between the outer wall of the piston and the oil seal will drip from the oil seal leakage isolation platform into the residual oil pool due to its own weight, and then flow through the residual oil inlet and residual oil outlet in sequence before entering the external residual oil collector.

[0008] Specifically, in step (1), the leaking oil at the piston oil inlet flows into the piston oil collection inlet and then flows out from the piston oil collection outlet through the L-shaped passage inside the piston.

[0009] Specifically, the width of the residual oil pool is greater than the width of the oil seal leakage isolation platform, so that oil droplets appearing on the oil seal leakage isolation platform can completely drip into the residual oil pool.

[0010] Specifically, the oil inlet leakage collection tank is provided with an anti-rotation rod fixing port for the piston anti-rotation rod to be screwed in, and the other end of the piston anti-rotation rod passes through the disc to limit the piston.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention discloses a method for handling leaking oil in a safety control gate for aerial passenger transport devices. By improving the piston, cylinder, and cylinder cover, an oil inlet leakage collection pool and an oil seal leakage isolation groove are installed on the piston to collect leaking oil at the inlet. A residual oil pool is installed on the cylinder cover to collect leaking oil at the oil seal. These pools, connected to the cylinder, discharge leaking oil without contaminating the control gate. This prevents the safety control gate on the aerial passenger transport device from losing braking force due to leaking oil, greatly reducing the risk of mine safety accidents. This invention achieves a leak-free and highly reliable safety control gate for aerial passenger transport devices at a relatively low cost, ensuring the safe operation of aerial passenger transport equipment in mines. Attached Figure Description

[0013] Figure 1 This is a top view of the safety control panel of the overhead passenger transport device in operation in any preferred embodiment of the present invention;

[0014] Figure 2 for Figure 1 DD sectional view;

[0015] Figure 3 for Figure 2 CC section view;

[0016] Figure 4 This is a top view of a safety control panel for an overhead passenger transport device in any preferred embodiment of the present invention;

[0017] Figure 5 for Figure 4AA sectional view of a safety-type control panel;

[0018] Figure 6 for Figure 4 BB sectional view of a safety control panel;

[0019] Figure 7 This is a perspective view of the cylinder head in any preferred embodiment of the present invention;

[0020] Figure 8 for Figure 7 Cross-sectional view of the cylinder head;

[0021] Figure 9 This is a three-dimensional structural diagram of the hydraulic cylinder in any preferred embodiment of the present invention;

[0022] Figure 10 This is a three-dimensional structural diagram of the piston in any preferred embodiment of the present invention;

[0023] Figure 11 for Figure 10 A frontal sectional view of the piston;

[0024] Figure 12 for Figure 11 CC section view of the piston;

[0025] Figure 13 for Figure 6 Enlarged view of part D in the image;

[0026] Figure 14 This is a diagram showing the local deformation of point D.

[0027] In the diagram: A1-Gate seat, A2-Gate disc, A3-Drive shaft, A4-Drive disc, A5-Safety gate disc, A6-Wire rope, A7-Ground plane, B1-Safety gate disc station 1, B2-Safety gate disc station 2, B3-Safety gate disc station 3, B4-Safety gate disc station 4, 1-Housing, 2-Central shaft, 3-Disc spring assembly, 4-Cylinder, 5-Gate shoe, 6-Disc spring washer, 7-Adjusting nut, 8-Tightening bolt, 9-Hydraulic cylinder, 10-Hydraulic cylinder cover, 11-Disc, 12-Piston, 13-Oil seal, 14-Piston anti-rotation rod, 15- Piston rod seal ring, 16-oil inlet connector, 17-oil seal leakage isolation trench, 18-oil inlet leakage collection pool, 19-residual oil pool, 20-piston oil collection inlet, 21-piston oil collection outlet, 22-oil inlet, 23-oil inlet passage, 24-cylinder seal ring, 25-oil seal leakage isolation platform, 26-residual oil port on cylinder head waist, 27-residual oil port in cylinder, 28-residual oil inlet, 29-residual oil outlet, 30-anti-rotation rod fixing port, 31-anti-rotation rod disc inlet hole, 32-piston top platform, 33-inner platform of oil inlet, 34-outer platform of oil inlet. Detailed Implementation

[0028] To better understand the content of this invention, the invention will be further described below with reference to specific embodiments and accompanying drawings. The following embodiments are based on the technology of this invention and provide detailed implementation methods and operating steps, but the scope of protection of this invention is not limited to the following embodiments.

[0029] In the following description of preferred embodiments of the present invention, directional terms are hereby specified and defined as follows: with ground plane A7 as a reference, the vertical direction is considered as the up-down direction, such as... Figure 2 The safety-type gate positions shown in B1 and B3 are located above the gate panel, while the safety-type gate positions shown in B2 and B4 are located below the gate panel. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly; for example, "connection" can refer to a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection; those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Please see Figure 1-3 This is a schematic diagram of the safety-type gate of the present invention applied to an overhead passenger transport device. The drive shaft A3 is located on the axis of the drive disc A4 and drives the drive disc A4 to rotate synchronously. Simultaneously, the steel wire rope A6, located on the gate disc A2 and wound around the circumference of the drive disc, is also driven synchronously. Figure 2 As shown, A7 is the ground plane. The safety-type gate A5 described in this invention is fixedly connected to the gate seat A1 and symmetrically arranged on the upper and lower sides of the gate. Specifically, the shell of the safety-type gate is fixedly connected to the gate seat by bolts, and the gate shoes are clamped on the gate. The specific installation positions are shown as safety-type gate station one B1, safety-type gate station two B2, safety-type gate station three B3, and safety-type gate station four B4. The number of safety-type gates A5 used in the overhead passenger transport device is not less than four.

[0031] Please see Figure 4-12The safety disc brake of the present invention includes a housing 1, a cylinder 4 passing through the housing and slidably connected thereto, a brake shoe 5 fixedly installed with the back plate of the cylinder, a disc spring assembly 3 located inside the cylinder and sleeved on the central shaft 2 for accumulating braking positive pressure of the safety disc brake, a disc spring pad 6 tightly located between the disc spring assembly and the cylinder 9 to transmit positive pressure, a cylinder 9 with a piston 12 movably installed inside, and a disc 11 abutting against the piston top platform 32 and connected to the cylinder through multiple tension bolts 8; the cylinder 9 forms a closed space structure with a cylinder cover 10, a disc 11, an oil seal 13, and a piston sealing ring 15, and the piston 12 slides in contact with the oil seal within the closed space structure; the oil inlet connector 16 passes through a pre-set circular hole in the disc and is screwed into the oil inlet 22 of the piston, the oil inlet 22 being located at the end of the piston rod and communicating with the oil inlet passage 23 inside the piston, for introducing or discharging high-pressure oil into or out of the cylinder to realize the braking process of the safety disc brake. The cylinder cover is slidably connected to one end of the adjusting nut 7, and the other end of the adjusting nut is threadedly connected to the housing. Rotating the adjusting nut can adjust the displacement of the cylinder of the safety disc brake relative to the housing, thereby adjusting the initial gap between the brake shoe 5 and the brake disc A2.

[0032] The specific working principle of the safety-type disc brake is as follows: High-pressure oil is introduced into the working chamber of the cylinder through the oil inlet connector 16, which in turn pushes the piston 12 to slide away from the cylinder along the axial edge of the oil seal 13. The piston top 32 applies an opening thrust to the disc 11, causing the disc to pull multiple tension bolts 8, which in turn move the cylinder and brake shoes towards the oil inlet connector. At this time, the disc spring assembly 3 is compressed and accumulates the braking positive pressure inside the disc spring assembly. The brake shoes 5 of the safety-type disc brake leave the brake disc A2, thus opening the brake. The braking positive pressure is then removed from the brake disc A2, and the driving... Disc A4 can be put into normal operation; when the oil pressure in the external oil inlet connector 16 decreases, the oil flows back from the working chamber of the cylinder to the outside through the oil inlet connector. The oil in the working chamber of the cylinder loses pressure, and the disc spring compression force accumulated in the disc spring assembly when the brake is opened is released onto the cylinder, which drives the tension bolt and the disc to transmit the disc spring compression force to the piston top, causing the piston to reset in the cylinder. At this time, the cylinder drives the brake shoe to press tightly against the brake disc A2, so that the brake disc obtains braking resistance and realizes the safety braking function of the safety disc brake A5.

[0033] Based on the aforementioned technology, the improvements made in this invention are as follows:

[0034] Please see Figure 10-12The piston is also equipped with a piston anti-rotation rod 14 and an oil seal leakage isolation groove 17. Specifically, an annular oil inlet leakage collection pool 18 is recessed along the circumference of the oil inlet on the piston top platform 32. The oil inlet leakage collection pool 18 is uniformly provided with an anti-rotation rod fixing port 30 and a piston oil inlet 20 along the circumference inside. The piston oil inlet passes through an L-shaped passage inside the piston and connects to the piston oil outlet 21 located on the outer wall of the piston rod to collect the oil leaking from the piston oil inlet. An annular oil seal leakage isolation platform 25 is provided below the piston oil outlet and around the piston step surface. An annular oil seal leakage isolation groove 17 is recessed between the oil seal leakage isolation platform and the outer circular wall of the piston rod to collect the leakage oil flowing out from the piston oil outlet and the oil film liquid (i.e. leakage oil) leaking between the piston and the oil seal.

[0035] The Figure 10 The piston has two oil inlets, but in other embodiments of the invention, the piston oil inlets may be set to one or more depending on the actual oil leakage situation, and this is not limited here; please refer to Figure 13 When the oil inlet connector is screwed into the piston's oil inlet, the inner concave surface 33 of the oil inlet is concave and in close contact with the oil inlet connector, forming a seal for the oil. The height of the concave surface is between the bottom of the oil leakage collection pool at the oil inlet and the piston top. However, in other embodiments of the present invention, when the oil inlet connector is screwed into the piston's oil inlet, the inner concave surface 33 of the oil inlet can be replaced by the outer protruding surface 34 of the oil inlet. Please refer to [link / reference]. Figure 14 The oil inlet protrusion platform 34 is convex and protrudes from the disc, allowing for the use of more types of oil inlet connectors.

[0036] Please see Figure 5 The piston anti-rotation rod 14 is inserted into the anti-rotation rod fixing port 30 located in the oil leakage collection tank at the oil inlet, and the two are fixed by a threaded connection. A corresponding anti-rotation rod disc inlet hole 31 is opened on the disc 11 for the piston anti-rotation rod 14 to pass through, which is used to limit the piston in the oil cylinder and prevent the piston from rotating during the tightening of the oil inlet connector 16; Figure 10 The number of anti-rotation rod fixing ports is two, but in other embodiments of the present invention, the number of anti-rotation rod fixing ports is not limited, as long as the requirement that the piston does not actually rotate is met.

[0037] Please see Figure 5 and Figure 7-9The cylinder head is fitted into the opening of the cylinder and connects with the piston inside the cylinder at the piston rod. The cylinder head is multi-ringed, with a recessed annular residual oil pool 19 inside. The residual oil pool 19 surrounds the outer circular wall of the piston rod, and a residual oil inlet 28 is opened at the bottom of the residual oil pool. The residual oil inlet is connected to a residual oil outlet 29 located on the outer wall of the cylinder head to allow leaked oil in the residual oil pool to flow out. The residual oil pool 19 and the oil seal leakage isolation platform 25 are symmetrically arranged in annular shape around the axis, and the width of the residual oil pool is large. The width of the oil seal leakage isolation platform is such that oil droplets appearing on the oil seal leakage isolation platform can completely drip into the residual oil pool; a residual oil port 26 for the cylinder cover waist is provided through the inner wall near the oil seal between the residual oil pool and the oil seal leakage isolation platform. The residual oil port for the cylinder cover waist is connected to the corresponding residual oil port 27 opened on the outer wall of the cylinder, so as to allow the leakage oil collected by the oil seal leakage isolation trench to flow out. The residual oil flowing out through the residual oil port 27 and the residual oil outlet 29 is all converged and guided to a specially attached residual oil collector through the external residual oil connector.

[0038] In this invention, the piston rod sealing ring 15 is located between the piston and the cylinder cover near the disc to prevent oil leakage; in this invention, a cylinder sealing ring 24 is also provided between the cylinder and the cylinder cover near the oil seal.

[0039] This invention proposes a method for handling oil leakage in a safety-type disc brake for an aerial passenger vehicle. This method prevents oil leakage onto the brake disc A2 during opening and closing, regardless of the braking system's position. It avoids contamination of the brake disc by leaking oil, which could lead to a loss of friction and consequently, a loss of braking force. The specific process by which this invention prevents leaking oil from flowing onto the brake disc is as follows:

[0040] 1. If the safety-type control panel is installed above control panel A2 (e.g.) Figure 2 As shown in B1 and B3, after the piston has been moving for a long time, an oil film will accumulate on the surface of the piston's outer wall that contacts the oil seal 13. The oil film will pass over the oil seal leakage isolation platform 25 and enter the oil seal leakage isolation groove 17, where it will accumulate and form leakage oil. At the same time, if oil leakage occurs at the oil inlet 22 connected to the oil inlet connector, the leaking oil will flow into the oil inlet leakage collection pool 18 and, by its own weight, flow through the piston oil collection inlet 20 and piston oil collection outlet 21 into the oil seal leakage isolation groove 17, where it will accumulate and form leakage oil. When the leakage oil accumulates to a certain extent, the oil level will rise to the residual oil port 26 at the waist of the cylinder head and then flow out through the residual oil port 27. The residual oil will then be led to a specially attached residual oil collector through the external residual oil connector to prevent leakage onto the brake disc.

[0041] 2. If the safety-type control panel is located below control panel A2 (e.g.) Figure 2As shown in B2 and B4, the oil film that seeps out between the outer wall of the piston and the oil seal will drip from the oil seal leakage isolation platform 25 into the residual oil pool 19 below due to its own weight. Then, it will flow from the residual oil inlet 28 through the residual oil outlet 29, and then be led to a specially attached residual oil collector through the external residual oil connector to prevent leakage onto the gate plate. The leaking oil at the oil inlet 22 will flow directly down to the bottom of the gate plate along the oil inlet connector due to the weight of the oil.

[0042] The piston rod diameter d1 of the piston ranges from 50 to 130 mm, and the piston diameter d2 ranges from 60 to 140 mm; the oil inlet passage 23 of the piston has a diameter range of 1 to 20 mm; the oil collection inlet 20 and the oil collection outlet 21 of the piston both have diameters ranging from 2 to 10 mm; the width k1 of the oil seal leakage isolation platform 25 ranges from 2 to 15 mm; the width k2 of the oil seal leakage isolation trench 17 ranges from 10 to 15 mm; the width k3 of the oil inlet leakage collection pool 18 ranges from 3 to 20 mm; the width k4 of the residual oil pool 19 on the piston ranges from 2 to 15 mm, where k4 > k1; the present invention does not impose special limitations on the above dimensions, and the above dimensions can be changed according to actual conditions in other embodiments;

[0043] The above description is merely a preferred embodiment of the present invention. The present invention may have other embodiments based on the above preparation method, which will not be listed hereafter. Therefore, any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments without departing from the scope of the present invention's technical solution, based on the technical essence of the present invention, shall still fall within the scope of the present invention's technical solution.

Claims

1. A method for treating oil leakage from a safety control panel for an overhead passenger transport device, characterized in that: The safety-type disc brake (A5) is fixedly connected to the brake seat (A1) and symmetrically arranged on the upper and lower sides of the brake disc. The safety-type disc brake includes a housing (1), a central shaft (2), a disc spring assembly (3), a cylinder (4), brake shoes (5), disc spring washers (6), adjusting nuts (7), tensioning bolts (8), a hydraulic cylinder (9), a hydraulic cylinder cover (10), a disc (11), a piston (12), an oil seal (13), and an oil inlet connector (16). The piston is provided with an oil inlet (22), and the piston top platform (32) is provided with an oil inlet circumferentially along the oil inlet. The oil leakage collection pool (18) is connected to the piston oil collection outlet (21) located on the outer circular wall of the piston rod through the piston oil collection inlet (20); the piston outer wall is provided with an annular oil seal leakage isolation groove (17) and an oil seal leakage isolation platform (25), the oil seal leakage isolation groove (17) is used to receive the leakage oil at the piston oil collection outlet and the oil seal; the cylinder head is provided with a residual oil pool (19) for receiving the leakage oil at the oil seal, and residual oil discharge structures are provided between the residual oil pool and the oil seal leakage isolation platform and inside the residual oil pool; When the safety-type disc brake (A5) is located above the brake disc (A2), the leaking oil at the piston inlet (22) flows into the inlet leakage collection pool (18), and then flows into the oil seal leakage isolation groove (17) through the piston oil collection inlet (20) and piston oil collection outlet (21); while the leaking oil between the piston outer wall and the oil seal (13) passes over the oil seal leakage isolation platform (25) and also enters the oil seal leakage isolation groove (17); when the oil level of the leaking oil in the oil seal leakage isolation groove accumulates to the height of the residual oil port (26) at the waist of the cylinder head, it is then introduced into the external residual oil collector through the residual oil port at the waist of the cylinder head and the residual oil port (27) in sequence. When the safety-type disc brake (A5) is located below the brake disc (A2), the leaking oil between the outer wall of the piston and the oil seal (13) will drip from the oil seal leakage isolation platform (25) into the residual oil pool (19) due to its own weight, and then flow through the residual oil inlet (28) and the residual oil outlet (29) in sequence before entering the external residual oil collector.

2. The method for treating oil leakage from a safety control panel for an overhead passenger transport device as described in claim 1, characterized in that, When the safety-type disc brake (A5) is located above the brake disc (A2), the leaking oil at the piston inlet flows into the piston oil collection inlet (20) and then flows out through the L-shaped passage inside the piston from the piston oil collection outlet (21).

3. The method for treating oil leakage from a safety control panel for an overhead passenger transport device as described in claim 1, characterized in that, The width of the residual oil pool (19) is greater than the width of the oil seal leakage isolation platform (25), so that the oil droplets appearing on the oil seal leakage isolation platform can completely drip into the residual oil pool.

4. The method for treating oil leakage from a safety control panel for an overhead passenger transport device as described in claim 1, characterized in that, The oil inlet leakage collection pool (18) is provided with a piston anti-rotation rod fixing port (30) for the piston anti-rotation rod (14) to be screwed in. The other end of the piston anti-rotation rod (14) passes through the disc to limit the piston.

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