Brake hydraulic element fault detection system and mining dump truck

Abstract

The utility model discloses a brake hydraulic element fault detection system and a mining dump truck. The brake hydraulic element fault detection system comprises an oil tank, a variable pump, a pedal valve, a relay valve, an angle sensor, a controller, a brake and a pressure sensor. The oil tank is used for storing hydraulic oil; the variable pump is connected with the oil tank, serves as a hydraulic system oil source and outputs hydraulic oil outwards; the pedal valve and the relay valve are respectively connected with the variable pump; the pedal valve outputs pressure oil which is proportional to a pedal angle to a pilot port of the relay valve; the angle sensor mounted on the pedal is used for sending the detected angle of the treaded pedal to the controller; the brake is connected with the relay valve, and the relay valve outputs pressure oil proportional to the pressure of the pilot port to the brake; the pressure sensor is electrically connected with the controller and sends the detected pressure of the brake to the controller, and the controller judges whether the pedal valve and the relay valve break down or not by analyzing the angle of the pedal valve and the pressure of the brake.

Description

Technical Field

[0001] The invention relates to a brake hydraulic component fault detection system and belongs to the field of mining machinery. Background Art

[0002] Mining dump trucks are widely used in large open-pit mines and earthwork construction sites due to their high efficiency and low operating costs in transporting minerals, earth, and other materials. Mining dump trucks primarily consist of a frame, engine, cab, electrical system, and braking system, with the braking system being a key component. Currently, mining dump trucks utilize hydraulic braking systems. To ensure safety, brake hydraulic pressure is monitored. Summary of the Invention

[0003] The utility model aims to provide a brake hydraulic component fault detection system, with the purpose of using the technical solution to issue an alarm when a brake hydraulic component pedal valve or relay valve fails.

[0004] The utility model is implemented according to the following technical solutions:

[0005] In a first aspect, the present invention provides a brake hydraulic component fault detection system, comprising:

[0006] Oil tank, used to store hydraulic oil;

[0007] A variable displacement pump, connected to the oil tank, serves as an oil source for the hydraulic system and outputs hydraulic oil to the outside;

[0008] The pedal valve and the relay valve are respectively connected to the variable pump, and the pedal valve outputs pressure oil proportional to the pedal angle to the pilot port of the relay valve;

[0009] An angle sensor mounted on the pedal and a controller electrically connected thereto, the angle sensor being used to send detected angles of the stepped pedal to the controller;

[0010] a brake connected to the relay valve, the relay valve outputting pressure oil proportional to the pilot port pressure to the brake;

[0011] The pressure sensor is electrically connected to the controller and sends the detected brake pressure to the controller. The controller determines whether the pedal valve and the relay valve are faulty by analyzing the pedal valve angle and the brake pressure.

[0012] In some embodiments, the brake includes a front wheel brake and a rear wheel brake, and the pedal valve outputs pressure oil proportional to the pedal angle to the pilot port of the front relay valve and the pilot port of the rear relay valve respectively; one pressure sensor is installed in the oil circuit of the front wheel brake and the rear wheel brake.

[0013] In some embodiments, the controller is connected to an on-vehicle alarm system. When the controller detects that a pedal valve or a relay valve fails, the controller controls the on-vehicle alarm system to sound an alarm.

[0014] In some embodiments, the vehicle-mounted alarm system is composed of a vehicle-mounted display screen for fault display and / or an audible and visual alarm for audible and visual prompts.

[0015] In a second aspect, the utility model provides a mining dump truck, comprising the above-mentioned brake hydraulic component fault detection system.

[0016] Beneficial effects of the utility model:

[0017] 1. By detecting the pedal valve angle and the front and rear wheel brake pressures, the controller performs calculations and comparisons, and can promptly issue an alarm for brake hydraulic component pedal valve and relay valve failures, thereby improving safety;

[0018] 2. By adding an angle sensor, fault detection of the brake hydraulic component pedal valve and relay valve can be realized, and its structural layout is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are part of this utility model and are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be derived from these drawings without inventive effort.

[0020] In the attached figure:

[0021] Figure 1 This is the principle diagram of the brake hydraulic component fault detection system of the utility model.

[0022] Figure identification: 1. Variable pump, 2. Pedal valve, 3. Angle sensor, 4. Controller, 5. Front wheel brake, 6. Front relay valve, 7. Pressure sensor, 8. Rear wheel brake, 9. Rear relay valve, 10. Pressure sensor, 11. Fuel tank.

[0023] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0025] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0026] like Figure 1 As shown, a brake hydraulic component fault detection system includes a variable pump 1, a pedal valve 2, an angle sensor 3, a controller 4, a front wheel brake 5, a front relay valve 6, a pressure sensor 7, a rear wheel brake 8, a rear relay valve 9, a pressure sensor 10, and an oil tank 11. The variable pump 1 serves as the hydraulic system oil source, outputting hydraulic oil to the pedal valve 2, the front relay valve 6, and the rear relay valve 9. When the pedal valve 2 is depressed, the pedal valve 2 outputs pressure oil proportional to the pedal angle to the PP pilot ports of the front relay valve 6 and the rear relay valve 9, respectively. The angle sensor 3 detects the depressed pedal angle and sends the result to the controller 4. The front relay valve 6 and the rear relay valve 9 then output pressure oil proportional to the PP pilot pressure to the front wheel brake 5 and the rear wheel brake 8. The pressure sensors 7 and 10 detect the pressures of the front wheel brake 5 and the rear wheel brake 8 and send them to the controller 4. If a fault occurs in the pedal valve or relay valve, the controller calculates and compares the pedal valve angle and the front and rear wheel brake pressures, and then controls the vehicle alarm system to issue an alarm.

[0027] A further solution: the vehicle alarm system is composed of a vehicle display screen for fault display and / or an audible and visual alarm for audible and visual prompts.

[0028] The working process of the above-mentioned brake hydraulic component fault detection system is given below:

[0029] Continue to refer to Figure 1As shown, when the brake hydraulic system of a mining dump truck operates normally: variable displacement pump 1 delivers hydraulic oil to pedal valve 2, front relay valve 6, and rear relay valve 9. Angle sensor 3 detects the angle at which the driver depresses pedal valve 2 and transmits the result to controller 4. Pedal valve 2 then delivers pressure oil proportional to the angle detected by angle sensor 3 to the PP pilot ports of front relay valve 6 and rear relay valve 9, respectively. Front relay valve 6 delivers pressure oil proportional to the pressure at the PP pilot port to the front wheel brake 5. Pressure sensor 7 detects the pressure at the front wheel brake 5 and transmits the result to controller 4. Rear relay valve 9 delivers pressure oil proportional to the pressure at the PP pilot port to the rear wheel brake 8. Pressure sensor 10 detects the pressure at the rear wheel brake 8 and transmits the result to controller 4. Based on the angle-pressure ratio of pedal valve 2, the pilot pressure-to-operating pressure ratio of the front relay valve 6, the pilot pressure-to-operating pressure ratio of the rear relay valve 9, and the angle signaled by angle sensor 3, controller 4 calculates the correct pressures A1 and A2 of pedal valve 2 to the front and rear wheel brakes 5 and 8, respectively. The controller 4 compares the detected pressure sent by the pressure sensors 7 and 10 with the calculated correct pressure at the same time, and does not issue an alarm if the operation is normal.

[0030] When a mining dump truck's brake hydraulic components, including the pedal valve and relay valve, malfunction, the variable displacement pump 1 delivers hydraulic fluid to the pedal valve 2, front relay valve 6, and rear relay valve 9. The angle sensor 3 detects the angle at which the driver depresses the pedal valve 2 and transmits this information to the controller 4. The pedal valve 2 then delivers pressure oil proportional to the angle detected by the angle sensor 3 to the PP pilot ports of the front and rear relay valves 6 and 9, respectively. The front relay valve 6 delivers pressure oil proportional to the pressure at the PP pilot port to the front wheel brake 5. The pressure sensor 7 detects the pressure at the front wheel brake 5 and transmits this information to the controller 4. The rear relay valve 9 delivers pressure oil proportional to the pressure at the PP pilot port to the rear wheel brake 8. The pressure sensor 10 detects the pressure at the rear wheel brake 8 and transmits this information to the controller 4. The controller 4 calculates the correct pressures A1 and A2 of the pedal valve 2 to the front and rear wheel brakes 5 and 8 based on the angle-pressure ratio of the pedal valve 2, the pilot pressure-to-operating pressure ratio of the front and rear relay valves 6 and 9, and the angle signaled by the angle sensor 3. Controller 4 simultaneously compares the detected pressures sent by pressure sensors 7 and 10 with the calculated correct pressures. If the pedal valve 2 or the front relay valve 6 malfunctions, the pressure of the front wheel brake 5 detected by pressure sensor 7 will not match the calculated correct pressure, and controller 4 will issue a front brake pressure alarm. If the pedal valve 2 or the rear relay valve 9 malfunctions, the pressure of the rear wheel brake 8 detected by pressure sensor 10 will not match the calculated correct pressure, and controller 4 will issue a rear brake pressure alarm.

[0031] In summary, the utility model detects the pedal valve angle and the front and rear wheel brake pressures, and the controller performs calculations and comparisons, which can promptly issue an alarm for brake hydraulic component pedal valve and relay valve failures, thereby improving safety; by adding an angle sensor to realize brake hydraulic component pedal valve and relay valve failure detection, its structural layout is simple and reliable.

[0032] The mining dump truck provided by the present invention is described below. The mining dump truck described below and the brake hydraulic component fault detection system described above can be referred to in correspondence with each other.

[0033] The utility model provides a mining dump truck, which may include the brake hydraulic component fault detection system as described in any one of the above embodiments.

[0034] The beneficial effects achieved by the mining dump truck provided by the present invention are consistent with the beneficial effects achieved by the brake hydraulic component fault detection system provided by the present invention, and will not be described in detail here.

[0035] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0036] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are also intended to fall within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art will be able to use them in combination based on the known technical solutions and the technical problems to be solved by this application.

[0037] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A brake hydraulic component fault detection system, characterized in that: include: Oil tank, used to store hydraulic oil; A variable displacement pump connected to the oil tank serves as an oil source for the hydraulic system and outputs hydraulic oil to the outside; The pedal valve and the relay valve are respectively connected to the variable pump, and the pedal valve outputs pressure oil proportional to the pedal angle to the pilot port of the relay valve; An angle sensor mounted on the pedal and a controller electrically connected thereto, the angle sensor being used to send detected angles of the stepped pedal to the controller; a brake connected to the relay valve, wherein the relay valve outputs pressure oil proportional to the pilot port pressure to the brake; The pressure sensor is electrically connected to the controller and sends the detected brake pressure to the controller. The controller determines whether the pedal valve and the relay valve are faulty by analyzing the pedal valve angle and the brake pressure.

2. A brake hydraulic component fault detection system according to claim 1, characterized in that: The brake includes a front wheel brake and a rear wheel brake, and the pedal valve outputs pressure oil proportional to the pedal angle to the pilot port of the front relay valve and the pilot port of the rear relay valve respectively; a pressure sensor is installed in the oil circuit of the front wheel brake and the rear wheel brake respectively.

3. The brake hydraulic component fault detection system according to claim 1, characterized in that: The controller is connected to the vehicle alarm system. When the controller detects that the pedal valve or the relay valve fails, the controller controls the vehicle alarm system to sound an alarm.

4. A brake hydraulic component fault detection system according to claim 3, characterized in that: The vehicle-mounted alarm system is composed of a vehicle-mounted display screen for displaying faults and / or an audible and visual alarm for providing audible and visual prompts.

5. A mining dump truck, characterized by: A brake hydraulic component fault detection system comprising the brake hydraulic component fault detection system according to any one of claims 1 to 4.

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