CN202850085U - Hydraulic excavator hybrid power energy saving system - Google Patents

Abstract

The utility model discloses a hybrid energy-saving system for a hydraulic excavator, which comprises an engine and a hydraulic pump installed on the hydraulic excavator, the engine is connected with the hydraulic pump through a transfer case, and also includes a general controller. The controller is connected with a generator connected with the output end of the engine, a rectifier connected with the output end of the generator, an inverter connected with the input end of the rectifier, and an input of the inverter The DC servo motor connected to the DC servo motor and the power storage device connected to the DC servo motor, the input end of the DC servo motor and the power storage device are both connected to the output end of the rectifier, and the motor and the power storage device are connected to each other. The master controllers are connected. The utility model has the advantages of simple structure, high control precision and strong practicability, which ensures full utilization of energy during the operation of the hydraulic excavator, realizes the energy-saving function during the operation of the hydraulic excavator, and has broad development space.

Description

A hybrid energy-saving system for a hydraulic excavator

technical field

The utility model relates to an energy-saving system for a hydraulic excavator, in particular to a hybrid energy-saving system for a hydraulic excavator.

Background technique

Hydraulic excavator is a kind of construction machine for earthwork excavation. Due to its strong adaptability and high operating efficiency, it is widely used in industrial and civil buildings, transportation, water conservancy and hydropower projects, farmland transformation, mine excavation and modernization. In the mechanized construction process of various industries such as military engineering, the energy loss generated by the slewing device of the hydraulic excavator during the construction process is mainly caused by the following three aspects:

1. During the starting and braking process of the hydraulic excavator slewing device, especially when the bucket is fully loaded, the pressure shock of the slewing hydraulic system caused by the large inertia causes the slewing hydraulic system to overflow and generate heat;

2. The slewing device of the hydraulic excavator requires a high-power engine configuration under instantaneous high-load conditions such as full-bucket lifting; while under low-load conditions such as the unloading stage, the engine power matching is too large, resulting in the engine running under low load conditions. Energy waste caused by insufficient energy utilization under certain conditions.

Utility model content

The purpose of this utility model is to overcome the shortcomings in the prior art and provide a hybrid energy-saving system for a hydraulic excavator. The energy waste problem of the hydraulic excavator is solved, and the power of the engine is fully utilized in the unloading stage of the hydraulic excavator and other small load conditions, the wasted energy is reused and the utilization rate of the engine power is improved, and the rotary process of the hydraulic excavator is realized. The energy-saving function in it has broad development prospects.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a hydraulic excavator hybrid energy-saving system, including an engine and a hydraulic pump installed on the hydraulic excavator, the engine is connected to the hydraulic pump through a transfer case , is characterized in that: it also includes a master controller, the master controller is connected with a generator connected with the output end of the engine, a rectifier connected with the output end of the generator, and an input end connected with the rectifier A connected inverter, a DC servo motor connected to the input end of the inverter, and an electrical storage device connected to the DC servo motor, the input end of the DC servo motor and the input end of the electrical storage device They are all connected to the output end of the rectifier, and the engine is connected to the general controller.

The above-mentioned hybrid energy-saving system for a hydraulic excavator is characterized in that the engine is connected to the general controller through an engine control module.

The above-mentioned hybrid energy-saving system for a hydraulic excavator is characterized in that the generator is connected to the general controller through a generator control module.

The above-mentioned hybrid energy-saving system for a hydraulic excavator is characterized in that the DC servo motor is connected to the general controller through a DC servo motor control module.

The above-mentioned hybrid energy-saving system for a hydraulic excavator is characterized in that: the general controller is a PLC controller.

The above-mentioned hybrid energy-saving system for a hydraulic excavator is characterized in that the rectifier is a silicon controlled rectifier.

The above-mentioned hybrid energy-saving system for a hydraulic excavator is characterized in that the power storage device is a high-performance polymer solid battery or a supercapacitor.

Compared with the prior art, the utility model has the following advantages:

1. Simple structure, high control precision and strong practicability.

2. It ensures the full utilization of energy during the operation of the hydraulic excavator and the working efficiency of the hydraulic excavator, realizes the energy-saving function during the working process of the hydraulic excavator, and has a broad development space.

Below by accompanying drawing and embodiment, the utility model is described in further detail.

Description of drawings

Fig. 1 is the block diagram of circuit principle of the utility model.

Fig. 2 is a structural schematic diagram of the utility model.

Explanation of reference signs:

1—master controller; 2—engine; 3—generator;

4—rectifier; 5—power storage device; 6—DC servo motor;

7—inverter; 8—transfer case; 9—hydraulic pump;

2-1—engine control module; 3-1—generator control module;

6-1—DC servo motor control module.

Detailed ways

A hybrid energy-saving system for a hydraulic excavator as shown in Figures 1 and 2 includes an engine 2 and a hydraulic pump 9 installed on the hydraulic excavator, the engine 2 is connected to the hydraulic pump 9 through a transfer case 8, Also includes a master controller 1, the master controller 1 is connected with a generator 3 connected to the output end of the engine 2, a rectifier 4 connected to the output end of the generator 3, and a rectifier 4 connected to the rectifier 4 The inverter 7 connected to the input end, the DC servo motor 6 connected to the input end of the inverter 7 and the power storage device 5 connected to the DC servo motor 6, the input end of the DC servo motor 6 and The input terminals of the power storage device 5 are all connected to the output terminals of the rectifier 4 , and the engine 2 is connected to the general controller 1 .

As shown in FIG. 2 , the engine 2 is connected to the master controller 1 through an engine control module 2 - 1 .

As shown in FIG. 2 , the generator 3 is connected to the master controller 1 through a generator control module 3 - 1 .

As shown in FIG. 2 , the DC servo motor 6 is connected to the general controller 1 through a DC servo motor control module 6 - 1 .

In this embodiment, the general controller 1 is a PLC controller.

In this embodiment, the rectifier 4 is a silicon controlled rectifier.

In this embodiment, the power storage device 5 is a high-performance polymer solid state battery or a supercapacitor.

As shown in Figures 1 and 2, the working principle of the present invention is: the engine 2 is connected to the generator 3 through the transfer case 8, so the power generated by the engine 2 can be used for the hydraulic pressure The pump 9 provides power and can also provide power for the generator 3 , and the master controller 1 distributes power to the generator 3 and the hydraulic pump 9 according to the operating conditions of the hydraulic excavator. When the slewing device of the hydraulic excavator is under no-load slewing, no-load or full-load braking, unloading and other working conditions, and the engine power is sufficient, a part of the power generated by the engine 2 drives the generator 3 to run. The alternating current generated when the generator 3 is running passes through the rectifier 4 and the direct current generated by the rectifier 4 can charge the power storage device 5, and when the bucket device of the hydraulic excavator is excavated, the turning device is started, and the full bucket is lifted In heavy load conditions such as slewing, the AC power generated by the generator 3 is rectified by the rectifier 4 and the DC power is supplied to the DC servo motor 6 together with the power storage device 5. When the hydraulic excavator When the slewing device is working in the braking phase, the DC servo motor 6 operates as a generator, and the DC power generated by the DC servo motor 6 is converted into AC power after passing through the inverter 7, and the converted AC power passes through the The rectifier 4 rectifies it into direct current. At this time, the rectified direct current charges the power storage device 5. When the motor 2 converts the generated mechanical energy into electric energy during the braking process, the generated alternating current passes through the After the rectifier 4 is converted into direct current, it can also realize the charging of the electric storage device, so that the originally wasted mechanical energy is converted into usable electric energy, and the recovery of mechanical energy is realized. At the same time, the engine control of the hydraulic excavator Module 2-1, generator control module 3-1 and DC servo motor control module 6-1 can transmit the actual operating conditions of the engine 2, generator 3 and DC servo motor 6 to the master controller 1 in real time , the general controller processes the signal after receiving the signal, and the processed result is used to control the operation of the engine 2 , the generator 3 and the DC servo motor 6 .

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (7)

1. hydraulic crawler excavator mix-driving and energy-saving system, comprise the motor (2) and the hydraulic pump (9) that are installed on the hydraulic crawler excavator, described motor (2) is connected with described hydraulic pump (9) by transfer case (8), it is characterized in that: also comprise master controller (1), described master controller (1) is connected with the generator (3) that is connected with the output of described motor (2), the rectifier (4) that is connected with the output of described generator (3), and the inverter (7) that is connected with the input of described rectifier (4), the DC servo motor (6) that is connected with the input of described inverter (7) and the electrical storage device (5) that is connected with described DC servo motor (6), the input of described DC servo motor (6) be connected the input of electrical storage device (5) and all be connected with the output of described rectifier (4), described motor (2) joins with described master controller (1).

2. a kind of hydraulic crawler excavator mix-driving and energy-saving according to claim 1 system, it is characterized in that: described motor (2) joins by engine control module (2-1) and described master controller (1).

3. a kind of hydraulic crawler excavator mix-driving and energy-saving according to claim 1 system, it is characterized in that: described generator (3) joins by generator control module (3-1) and described master controller (1).

4. a kind of hydraulic crawler excavator mix-driving and energy-saving according to claim 1 system, it is characterized in that: described DC servo motor (6) joins by DC servo motor control module (6-1) and described master controller (1).

5. the described a kind of hydraulic crawler excavator mix-driving and energy-saving of arbitrary claim system according to claim 1～4, it is characterized in that: described master controller (1) is the PLC controller.

6. the described a kind of hydraulic crawler excavator mix-driving and energy-saving of arbitrary claim system according to claim 1～4, it is characterized in that: described rectifier (4) is silicon controlled rectifier (SCR).

7. the described a kind of hydraulic crawler excavator mix-driving and energy-saving of arbitrary claim system according to claim 1～4, it is characterized in that: described electrical storage device (5) is high-performance polymer solid accumulator or super capacitor.

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