Pure electric refitted structure of dual-power-supply side pantograph of mining dump truck

Abstract

The utility model discloses a pure electric modified structure of a dual-power side pantograph of a mining dump truck, which relates to the technical field of electric modification of mining vehicles, and comprises a vehicle-mounted electric power system formed by electrically connecting a power battery, a vehicle-mounted charger, a rectifier cabinet, an inverter and an alternating current motor at one time; the side pantograph system is arranged on the side of a vehicle cab and comprises a liftable pantograph and a contact net connected with the pantograph, and the pantograph is electrically connected with the rectifier cabinet through the control cabinet; and the dual-power-supply switching module is integrated in the control cabinet and used for switching power supply modes of the power battery and the overhead line system, endurance anxiety is eliminated through dynamic charging, power is supplied to a main transportation road section in real time through the overhead line system, and the vehicle can run on 80% of fixed lines without the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric reconstruction of mine vehicles, in particular to a mine dump truck double power side -by -side pantograph pure electric retrofit structure. BACKGROUND

[0002] The mine dump truck is the core transport equipment in the scene of open -pit mine, large earthwork engineering etc., and traditionally generally adopts the high -power diesel engine drive.

[0003] The existing technology is mainly diesel consumption, and the carbon emission exceeds the standard, the truck transportation cost increases, the truck repair, maintenance cost is big, the braking energy cannot be recycled, and the truck speed reduces when climbing heavy load.

[0004] 2, AC+DC power supply technology completely solves the defects of the original technology.

[0005] 3, pure electricity, electric wheel truck replaces fuel power generation, electric wheel truck, mainly the development of science and technology, the successful use of high -power battery. CONTENT OF THE UTILITY MODEL

[0006] In view of the deficiency of prior art, the utility model provides mine dump truck double power side -by -side pantograph pure electric retrofit structure, and the technical problem in the above background technology is solved.

[0007] In order to realize the above object, the utility model is realized through the following technical scheme: mine dump truck double power side -by -side pantograph pure electric retrofit structure, comprising:

[0008] Vehicle-mounted power system: there is power battery, vehicle-mounted charging, rectifier cabinet, inverter and AC motor primary electric connection composition;

[0009] Side -by -side pantograph system: set up in the side of vehicle cab, including the pantograph of liftable and the contact net connected with it, the pantograph is connected with rectifier cabinet through control cabinet;

[0010] Double power switching module: integrated in control cabinet, for switching the power supply mode of power battery and contact net;

[0011] Ground power supply system: including power station and contact net along the driving route, and the output of power station is connected with contact net after rectifier cabinet adaptation.

[0012] Preferably, the pantograph is of folding structure, the unfolded height is adjustable, and is arranged laterally at 30 °-60 ° angle with the horizontal direction.

[0013] Preferably, the control cabinet has a built-in PLC controller that monitors the battery power and contact network voltage in real time and automatically triggers power switching.

[0014] Preferably, the contact wire is a segmented insulated overhead line, with the length of each segment matching the length of the truck bed, and an insulation gap is provided at the segmentation.

[0015] Preferably, the power battery is a lithium iron phosphate battery pack, which is arranged on both sides of the vehicle chassis and charged via the overhead contact line through on-board charging.

[0016] Beneficial effects

[0017] This utility model provides a dual-power side-mounted pantograph pure electric conversion structure for mining dump trucks. This utility model eliminates range anxiety through dynamic charging.

[0018] By providing real-time power to the main transport routes via overhead contact lines, vehicles can operate without batteries on 80% of the fixed lines. Actual measurement data shows that:

[0019] Traditional pure electric mining trucks (powered by batteries only) require charging for 1 hour every 4 hours, but after modification, they can operate continuously for 24 hours.

[0020] The battery capacity requirement has been reduced from 1200kWh in the conventional solution to 800kWh, resulting in a weight reduction of approximately 1.8 tons and a 15% reduction in energy consumption.

[0021] Seamless switching between dual power supplies:

[0022] The control cabinet adopts pre-synchronization switching technology, with a switching time of ≤200ms and vehicle speed fluctuations controlled within ±3km / h to avoid interruption of the loading and unloading process. Attached Figure Description

[0023] Figure 1 This is a flowchart and structural diagram of the dual-power side-mounted pantograph pure electric modification structure for mining dump trucks described in this utility model.

[0024] In the diagram: 1. Control cabinet; 2. Power station; 3. Overhead contact line; 4. Pantograph; 5. Truck; 6. Rectifier cabinet; 7. Inverter; 8. AC motor; 9. Cabin; 10. On-board charger; 11. Power battery. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 This utility model provides a technical solution: a pure electric modification structure for a mining dump truck with dual power supply and side-mounted pantograph, comprising:

[0027] The vehicle power system consists of a power battery 11, an on-board charger 10, a rectifier cabinet 6, an inverter 7, and an AC motor 8 connected in primary power.

[0028] Side-mounted pantograph system: installed on the side of the vehicle cab 9, including a liftable pantograph 4 and a contact wire 3 connected thereto. The pantograph 4 is electrically connected to the rectifier cabinet 6 through the control cabinet 1.

[0029] Dual power supply switching module: integrated in control cabinet 1, used to switch the power supply mode between power battery 11 and contact network 3;

[0030] Ground power supply system: including power station 2 and contact network 3 laid along the driving route. The output of power station 2 is connected to contact network 3 after being adapted by rectifier cabinet 6.

[0031] In this embodiment, the pantograph 4 is further configured to have a foldable structure, with an adjustable unfolded height, and is arranged laterally at an angle of 30°-60° to the horizontal direction.

[0032] In this embodiment, the control cabinet 1 is further configured to have a built-in PLC controller that monitors the power level of the battery 11 and the voltage of the contact wire 3 in real time and automatically triggers power switching.

[0033] In this embodiment, the contact wire 3 is further configured as a segmented insulated overhead line, with the length of each segment matching the length of the truck 5's cargo box, and an insulation gap is provided at the segmentation points.

[0034] In this embodiment, the power battery 11 is a lithium iron phosphate battery pack, which is arranged on both sides of the vehicle chassis and the contact network 3 is charged through the on-board charger 10.

[0035] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0036] Example:

[0037] Initial state:

[0038] When the truck (5) is operating in non-contact network areas (such as loading and unloading areas), it is powered by a power battery (11) with a rated voltage of DC1056V (24 sets of lithium iron phosphate in series) and a capacity of 800kWh. The battery drives an AC motor (8) (peak power 650kW) through an inverter (7) (model: TMEHV-3000).

[0039] Overhead contact network connection phase:

[0040] When the vehicle enters the main transport road, the HMI screen in the cab (9) prompts "Contact network ready", and the driver presses the pantograph (4) start button (or is automatically triggered by the control cabinet 1);

[0041] The side-mounted pantograph (4) (model: SSG-1500D) is hydraulically driven to extend to the left side of the vehicle. The rising column is raised at a speed of 0.5m / s and finally maintains a 45° angle with the contact wire (3), with a contact pressure of 70±10N.

[0042] After the control cabinet (1) detects the contact network voltage AC10kV / 50Hz, the rectifier cabinet (6) (including SiC module, efficiency ≥98%) converts it to DC1500V and cuts off the battery power supply at the same time. The switching time is ≤200ms.

[0043] Hybrid power supply mode:

[0044] When the vehicle is running, the overhead contact line (3) directly supplies power to the AC motor (8) and charges the battery (11) with a current of 100A through the on-board charger (10) (bidirectional DC-DC, efficiency 95%).

[0045] If a brief power outage occurs due to the segmented insulation zone of the overhead contact line (each segment is 10m long), the control cabinet (1) will immediately switch to battery power to ensure that the vehicle speed fluctuation is ≤5%.

[0046] Phase of exiting the overhead contact line:

[0047] GPS positioning or RFID tag identification indicates that the vehicle is about to leave the power supply area, triggering an audible and visual alarm. The driver lowers the pantograph (4), and the battery (11) supplies power separately.

[0048] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A dual-power, side-mounted pantograph pure electric conversion structure for mining dump trucks, characterized in that: include: The vehicle power system consists of a power battery (11), a vehicle charger (10), a rectifier cabinet (6), an inverter (7), and an AC motor (8) connected to the primary power supply. Side-mounted pantograph system: installed on the side of the vehicle cab (9), including a liftable pantograph (4) and a contact wire (3) connected thereto. The pantograph (4) is electrically connected to the rectifier cabinet (6) through the control cabinet (1). Dual power switching module: integrated in the control cabinet (1), used to switch the power supply mode of the power battery (11) and the contact network (3); Ground power supply system: including power station (2) and contact network (3) laid along the driving route. The output of power station (2) is connected to contact network (3) after being adapted by rectifier cabinet (6).

2. The dual-power side-mounted pantograph pure electric conversion structure for mining dump trucks according to claim 1, characterized in that, The pantograph (4) is a folding structure with an adjustable unfolding height and is arranged laterally at an angle of 30°-60° to the horizontal direction.

3. The dual-power side-mounted pantograph pure electric conversion structure for mining dump trucks according to claim 1, characterized in that, The control cabinet (1) has a built-in PLC controller that monitors the power of the battery (11) and the voltage of the contact network (3) in real time and automatically triggers power switching.

4. The dual-power side-mounted pantograph pure electric conversion structure for mining dump trucks according to claim 1, characterized in that, The contact wire (3) is a segmented insulated overhead line, with the length of each segment matching the length of the truck (5) carriage, and an insulation gap is provided at the segmentation point.

5. The dual-power side-mounted pantograph pure electric conversion structure for mining dump trucks according to claim 1, characterized in that, The power battery (11) is a lithium iron phosphate battery pack, which is arranged on both sides of the vehicle chassis and the contact wire (3) is charged through the on-board charger (10).

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