Oil-electricity hybrid power system for crawler-type material distributing machine

Abstract

The utility model discloses an oil-electricity hybrid power system for a crawler-type material distributing machine, which comprises an electric driving system, a hydraulic system, a fuel oil power system and a battery energy storage system, is provided with a three-phase alternating current power supply interface, and is provided with three power source providing modes of fuel oil, a battery and alternating current to realize hybrid power driving. When the material distributing machine moves for a long distance or has no power supply, the fuel engine is adopted for driving, when the material distributing machine moves for a short distance or conveys concrete and has the power supply, the field three-phase alternating-current power supply is switched to replace the diesel engine to work, and energy is stored through the arranged battery energy storage system. When a construction site is temporarily or suddenly powered off, the AC / DC charging and discharging unit is used for enabling the battery energy storage unit to rapidly discharge, electric energy is provided for the feeding belt conveyor driving motor and the distributing belt conveyor driving motor, the energy utilization efficiency is improved through the hybrid power driving mode, pollution is avoided, and the purposes of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery power systems, and more specifically, to an oil-electric hybrid power system for a crawler-type material placing machine. Background Art

[0002] Crawler concrete placing machine is a mobile and flexible concrete pouring equipment, which can move freely, rotate 360°, and the boom can be extended and retracted freely within a certain range. It has been widely used in concrete construction and material transportation of water conservancy and hydropower projects, ports, terminals, airports and other buildings. At present, the traditional fuel crawler concrete placing machine is powered by a diesel engine, which is connected to the reducer through the transmission shaft to drive the hydraulic main oil pump to provide power for the hydraulic motor of the hydraulic system, so as to complete its travel, rotation, feeding, spreading, boom extension and retraction and other actions. Usually, when the crawler concrete placing machine travels to the predetermined pouring point and adjusts in place, before completing the concrete delivery, it mainly relies on the hydraulic motors of the feeding belt conveyor and the spreading belt conveyor to complete the concrete delivery work, while the travel and rotation hydraulic motors stop working. Under this working condition, the engine of the concrete placing machine has low energy efficiency, high cost of long-term operation, and noise and air pollution. Utility Model Content

[0003] The utility model aims to provide an oil-electric hybrid power system for a crawler concrete placing machine, so as to solve the technical problems in the prior art that the crawler concrete placing machine uses a diesel engine as a power source when conveying concrete, resulting in low energy efficiency and high pollution.

[0004] In order to achieve these purposes and other advantages according to the utility model, a hybrid power system for a crawler-type material placing machine is provided, comprising:

[0005] The electric drive system includes a main motor, a feeding belt drive motor, and a fabric belt drive motor;

[0006] Three-phase AC power supply interface, which is electrically connected to the main motor, the feeding belt conveyor drive motor, and the fabric belt conveyor drive motor respectively;

[0007] The fuel power system is used to provide a power source for the electric drive system, including a diesel generator and a main generator. The diesel generator is used to drive the main generator to generate electricity. The main generator is electrically connected to the main motor, the feeding belt drive motor, and the cloth belt drive motor respectively;

[0008] The battery energy storage system includes a battery energy storage unit and an AC / DC charging and discharging unit which are electrically connected to each other. The battery energy storage unit completes charging and discharging work through the AC / DC charging and discharging unit to provide electric energy for the electric drive system. The AC / DC charging and discharging unit is electrically connected to the main motor, the feeding belt drive motor, and the fabric belt drive motor respectively;

[0009] The hydraulic system includes a hydraulic main oil pump and a hydraulic travel mechanism. One end of the hydraulic main oil pump is mechanically connected to the main motor and the other end is mechanically connected to the hydraulic travel mechanism. The hydraulic travel mechanism is used to complete the walking action of the crawler concrete placing machine.

[0010] Preferably, the hydraulic travel mechanism includes a travel drive hydraulic motor, a slewing drive hydraulic motor, a boom luffing cylinder, and a boom telescopic hydraulic motor.

[0011] Preferably, a multi-way reversing valve is provided at the output end of the hydraulic main oil pump, and the multi-way reversing valve is respectively connected to the power source input ends of the travel drive hydraulic motor, the slewing drive hydraulic motor, the boom luffing cylinder and the boom telescopic hydraulic motor.

[0012] Preferably, a monitoring unit is also included, which is electrically connected to the battery energy storage unit, the main generator, the main motor, the feeding belt drive motor, and the cloth belt drive motor, respectively, and is used to monitor and display the three-phase parameters of the corresponding connected equipment, and the three-phase parameters include current, voltage, and power.

[0013] Preferably, it also includes an action control unit, which is electrically connected to the monitoring unit, the diesel engine, the electric drive system, and the hydraulic system respectively. The monitoring unit is also used to issue a start or stop instruction to the action control unit, so as to start or stop the operation of the diesel engine, the main motor, the feeding belt conveyor drive motor, the cloth belt conveyor drive motor, and the hydraulic walking mechanism through the action control unit.

[0014] Preferably, the electric drive system also includes a frequency converter, and the electric motor, the feeding belt drive motor and the material distribution belt drive motor all use permanent magnet synchronous motors and are electrically connected to the three-phase AC power supply interface, the main generator and the AC / DC charging and discharging unit through a frequency converter respectively, and the action control unit is connected to each frequency converter, and the operating frequency of the electric motor, the feeding belt drive motor and the material distribution belt drive motor is adjusted through the frequency converter.

[0015] The utility model includes at least the following beneficial effects: the hybrid oil-electric system for a crawler concrete placing machine of the utility model includes an electric drive system, a hydraulic system, a fuel power system, a battery energy storage system, and a three-phase AC power supply interface. A total of three power source modes, namely, fuel, battery, and AC power, are provided to realize hybrid power drive. When the concrete placing machine moves a long distance or there is no power supply, it is driven by a fuel engine. When it moves a short distance or transports concrete and there is power supply, it is switched to the on-site three-phase AC power supply instead of the diesel engine to work, and energy is stored by the set battery energy storage system. When there is a short or sudden power outage on the construction site, the AC / DC charging and discharging unit is used to quickly discharge the battery energy storage unit to provide power supply for the feeding belt drive motor and the material placing belt drive motor. The hybrid power drive mode improves energy utilization efficiency, is pollution-free, and achieves the goal of energy conservation and emission reduction.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structural connection of the utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0019] In the description of the present invention, terms such as "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figure 1 As shown, the oil-electric hybrid power system for a crawler-type material placing machine of the utility model comprises:

[0021] The electric drive system includes a main motor, a feeding belt drive motor, and a fabric belt drive motor;

[0022] Three-phase AC power supply interface, which is electrically connected to the main motor, the feeding belt conveyor drive motor, and the fabric belt conveyor drive motor respectively;

[0023] The fuel power system is used to provide a power source for the electric drive system, including a diesel generator and a main generator. The diesel generator is used to drive the main generator to generate electricity. The main generator is electrically connected to the main motor, the feeding belt drive motor, and the cloth belt drive motor respectively;

[0024] The battery energy storage system includes a battery energy storage unit and an AC / DC charging and discharging unit which are electrically connected to each other. The battery energy storage unit completes charging and discharging work through the AC / DC charging and discharging unit to provide electric energy for the electric drive system. The AC / DC charging and discharging unit is electrically connected to the main motor, the feeding belt drive motor, and the fabric belt drive motor respectively;

[0025] The hydraulic system includes a hydraulic main oil pump and a hydraulic travel mechanism. One end of the hydraulic main oil pump is mechanically connected to the main motor and the other end is mechanically connected to the hydraulic travel mechanism. The hydraulic travel mechanism is used to complete the walking action of the crawler concrete placing machine.

[0026] The oil-electric dual power system used for crawler concrete placing machines mainly includes an electric drive system, a hydraulic system, a fuel power system, a battery energy storage system, and a three-phase AC power supply interface. There are three power source modes: fuel, battery, and AC power. When the diesel engine is running, it drives the main generator to generate electricity. The main motor of the electric drive system, the feeding belt drive motor, and the fabric belt drive motor can be provided with electricity through the main generator, the on-site three-phase AC power supply or the discharge of the energy storage battery pack. The power of the hydraulic system comes from the main motor.

[0027] When the crawler concrete placing machine moves a long distance or there is no electricity supply, the diesel engine is used to provide power for the hydraulic system and the main motor, the feeding belt conveyor drive motor, and the fabric conveyor drive motor to enable it to complete the actions of walking, spreading, and loading.

[0028] When moving or transporting concrete over short distances and the construction site has the conditions for power supply, first disconnect the electrical connection between the main generator and the AC bus, and then connect the three-phase AC power at the construction site through the three-phase AC power interface to provide power supply for the main motor, feeding belt drive motor, and material distribution belt drive motor. When the battery energy storage unit is insufficient, use the AC / DC charging and discharging unit to charge the battery energy storage unit to its full charge state; when the construction site is temporarily or suddenly out of power during the concrete transportation operation, first disconnect the three-phase AC power interface switch, and then use the AC / DC charging and discharging unit to quickly discharge the battery energy storage unit to provide power supply for the feeding belt drive motor and the material distribution belt drive motor, so as to replace the diesel engine to work and achieve the goal of energy conservation and emission reduction.

[0029] The utility model discloses a hybrid power system for a crawler concrete placing machine, which realizes hybrid power drive by adding an electric drive system and a battery energy storage system to a traditional fuel-type crawler concrete placing machine, that is, the fuel engine is used for driving when the concrete placing machine moves a long distance or there is no power supply condition, and when the concrete placing machine moves a short distance or transports concrete and there is power supply condition, the machine switches to the on-site three-phase AC power supply instead of the diesel engine for operation, and the battery energy storage system is used for power supply when there is no power supply. When the electric drive is used, the machine has high efficiency and is pollution-free, and the power consumption varies with the load, thereby achieving the purpose of energy saving and environmental protection.

[0030] In another technical solution, Figure 1 As shown, the hydraulic travel mechanism includes a travel drive hydraulic motor, a slewing drive hydraulic motor, a boom luffing cylinder, and a boom telescopic hydraulic motor, which are respectively used to complete the travel, slewing, boom movement and other actions of the concrete placing boom.

[0031] In another technical solution, Figure 1 As shown, the output end of the hydraulic main oil pump is provided with a multi-way reversing valve, which is respectively connected to the power source input ends of the travel drive hydraulic motor, the slewing drive hydraulic motor, the boom luffing cylinder, and the boom telescopic hydraulic motor. By providing a multi-way reversing valve, different working requirements of the hydraulic system of the concrete placing crane can be met.

[0032] In another technical solution, Figure 1 As shown, a monitoring unit is also included, which is electrically connected to the battery energy storage unit, the main generator, the main motor, the feeding belt drive motor, and the cloth belt drive motor, respectively, and is used to monitor and display the three-phase parameters of the corresponding connected equipment, and the three-phase parameters include current, voltage, and power.

[0033] The multifunctional monitoring unit is mainly used to monitor the voltage, current, power and other parameters of the main generator, main motor, feeding belt drive motor and fabric belt drive motor in real time, and displays them on the operation panel to facilitate the operation of setting the corresponding motor start and stop work instructions.

[0034] In another technical solution, Figure 1As shown, it also includes an action control unit, which is electrically connected to the monitoring unit, the diesel engine, the electric drive system, and the hydraulic system respectively. The monitoring unit is also used to send a start or stop command to the action control unit, and the operation of the diesel engine, the main motor, the feeding belt drive motor, the cloth belt drive motor, and the hydraulic travel mechanism is started or stopped by the action control unit. The operation panel set in the monitoring unit sets the start or stop command and sends it to the action control unit, which then controls the operation of the corresponding drive motor. The action control unit can adopt the structure of the existing technology such as the control chip.

[0035] In another technical solution, Figure 1 As shown, the electric drive system also includes a frequency converter, the electric motor, the feeding belt drive motor and the material distribution belt drive motor all use permanent magnet synchronous motors and are electrically connected to the three-phase AC power supply interface, the main generator and the AC / DC charging and discharging unit through a frequency converter respectively, the action control unit is connected to each frequency converter, and the operating frequency of the electric motor, the feeding belt drive motor and the material distribution belt drive motor is adjusted by the frequency converter, and the power consumption changes with the load, which can achieve the purpose of energy saving and environmental protection.

[0036] Specifically, the oil-electric dual power system for crawler concrete placing machines can adopt the following two working modes:

[0037] When the crawler concrete placing machine moves a long distance or there is no power supply at the construction site, the diesel engine is used to drive the main generator to operate. The start, stop and other buttons on the operation panel of the monitoring unit are used to send instructions to the frequency converter and multi-way reversing valve electrically connected to the action control unit, so that the concrete placing machine can complete the movement, rotation and other actions, and the feeding belt conveyor and the placing belt conveyor can operate. If the multi-functional monitoring unit detects that the output power of the main generator is lower than the rated power and the battery energy storage unit is insufficient, the AC / DC charging and discharging unit is used to charge the battery energy storage unit to its full power state.

[0038] When moving or transporting concrete over short distances and the construction site is equipped with power supply conditions, first disconnect the electrical connection between the main generator and the AC busbar, and then connect the three-phase AC power at the construction site through the three-phase AC power interface to provide power supply for the main motor, the feeding belt drive motor, and the material distribution belt drive motor. If the multi-function monitoring unit detects that the battery energy storage unit is low on power, use the AC / DC charging and discharging unit to charge the battery energy storage unit to its full power state; when the construction site is temporarily or suddenly out of power during the concrete transportation operation, first disconnect the three-phase AC power interface switch, and then use the AC / DC charging and discharging unit to quickly discharge the battery energy storage unit to provide power supply for the feeding belt drive motor and the material distribution belt drive motor.

[0039] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the drawings shown and described herein.

Claims

1. A hybrid power system for a crawler concrete placing machine, characterized in that: include: The electric drive system includes a main motor, a feeding belt drive motor, and a fabric belt drive motor; Three-phase AC power supply interface, which is electrically connected to the main motor, the feeding belt conveyor drive motor, and the fabric belt conveyor drive motor respectively; The fuel power system is used to provide a power source for the electric drive system, including a diesel generator and a main generator. The diesel generator is used to drive the main generator to generate electricity. The main generator is electrically connected to the main motor, the feeding belt drive motor, and the cloth belt drive motor respectively; The battery energy storage system includes a battery energy storage unit and an AC / DC charging and discharging unit which are electrically connected to each other. The battery energy storage unit completes charging and discharging work through the AC / DC charging and discharging unit to provide electric energy for the electric drive system. The AC / DC charging and discharging unit is electrically connected to the main motor, the feeding belt drive motor, and the fabric belt drive motor respectively; The hydraulic system includes a hydraulic main oil pump and a hydraulic travel mechanism. One end of the hydraulic main oil pump is mechanically connected to the main motor and the other end is mechanically connected to the hydraulic travel mechanism. The hydraulic travel mechanism is used to complete the walking action of the crawler concrete placing machine.

2. The hybrid power system for a crawler-type material placing machine according to claim 1, characterized in that: The hydraulic travel mechanism comprises a travel drive hydraulic motor, a slewing drive hydraulic motor, a boom luffing cylinder, and a boom telescopic hydraulic motor.

3. The hybrid power system for a crawler-type material placing machine according to claim 2, characterized in that: The output end of the hydraulic main oil pump is provided with a multi-way reversing valve, which is respectively connected to the power source input ends of the travel drive hydraulic motor, the slewing drive hydraulic motor, the boom luffing cylinder and the boom telescopic hydraulic motor.

4. The hybrid power system for a crawler-type material placing machine according to claim 1, characterized in that: It also includes a monitoring unit, which is electrically connected to the battery energy storage unit, the main generator, the main motor, the feeding belt conveyor drive motor, and the cloth belt conveyor drive motor, and is used to monitor and display the three-phase parameters of the corresponding connected equipment, and the three-phase parameters include current, voltage, and power.

5. The hybrid power system for a crawler-type material placing machine according to claim 4, characterized in that: It also includes an action control unit, which is electrically connected to the monitoring unit, the diesel engine generator, the electric drive system, and the hydraulic system respectively. The monitoring unit is also used to issue a start or stop instruction to the action control unit, and start or stop the operation of the diesel engine generator, the main motor, the feeding belt conveyor drive motor, the cloth belt conveyor drive motor, and the hydraulic walking mechanism through the action control unit.

6. The hybrid power system for a crawler-type material placing machine according to claim 5, characterized in that: The electric drive system also includes a frequency converter. The main motor, the feeding belt drive motor and the material distribution belt drive motor all use permanent magnet synchronous motors and are electrically connected to the three-phase AC power supply interface, the main generator and the AC / DC charging and discharging unit through a frequency converter respectively. The action control unit is connected to each frequency converter, and the operating frequency of the main motor, the feeding belt drive motor and the material distribution belt drive motor is adjusted through the frequency converter.

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