A heat dissipation system for a shovel working oil circuit

Abstract

This invention relates to the field of vehicle-mounted cooling systems, and particularly to a cooling system for the working oil circuit of a loader. The system includes a radiator, a battery, a generator, a relay, and a radiator motor. The radiator cools the oil in the working oil circuit, and the radiator motor drives the radiator for heat exchange. The power supply circuit of the radiator motor is electrically connected to the battery, and the contacts of the relay are connected in series in the power supply circuit of the radiator motor. The control terminal of the relay receives the generator's power generation signal to control the relay to engage when the generator is generating power, thereby connecting the power supply circuit of the radiator motor and driving the radiator motor to run. This invention, by receiving the generator's power generation signal through the relay and connecting the radiator motor circuit when the generator is generating power, allows the radiator motor to operate under battery power, achieving continuous cooling and thus helping to maintain a stable temperature in the working oil circuit.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted cooling systems, and in particular to a cooling system for the working oil circuit of a loader. Background Technology

[0002] After a 1 cubic meter loader undergoes a complete overhaul or a modification to its power and hydraulic systems, the heat dissipation conditions of the working oil circuit may change. This can lead to difficulties in timely heat dissipation during actual operation, resulting in problems such as excessively high oil temperature and frequent equipment failures. These oil temperature issues are particularly pronounced under conditions of high load or continuous operation after the overhaul, thus affecting the reliability and efficiency of the equipment.

[0003] Therefore, a cooling system for the working oil circuit of a loader is proposed. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a heat dissipation system for the working oil circuit of a loader.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a heat dissipation system for the working oil circuit of a loader, comprising a radiator, a battery, a generator, a relay, and a radiator motor. The radiator is used to dissipate heat from the oil in the working oil circuit, and the radiator motor is used to drive the radiator for heat exchange. The power supply circuit of the radiator motor is electrically connected to the battery, and the contacts of the relay are connected in series in the power supply circuit of the radiator motor. The control terminal of the relay receives the generator's power generation signal to control the relay to engage when the generator generates electricity, thereby connecting the power supply circuit of the radiator motor and driving the radiator motor to run.

[0006] As a preferred embodiment of the present invention, the power generation signal is a status signal used to indicate that the generator has entered the power generation state, and the relay is activated when the generator enters the power generation state.

[0007] As a preferred embodiment of the present invention, the heat dissipation system further includes a multi-functional control relay, which has a signal terminal for connecting to the generator operating status signal, a power terminal for connecting to the ignition switch power supply, and a grounding terminal for grounding; the multi-functional control relay also has a start output terminal, which is connected to the actuator of the start circuit to turn on the starter motor.

[0008] As a preferred embodiment of the present invention, the heat dissipation system further includes a circuit breaker, which is disposed between the generator's output circuit and the vehicle's power supply bus.

[0009] As a preferred embodiment of the present invention, the heat dissipation system further includes diodes and indicator lights, which are arranged in circuits related to the generator's power generation status indication and excitation.

[0010] As a preferred embodiment of the present invention, the generator is electrically connected to the battery and the vehicle load so as to charge the battery and supply power to the vehicle load when the generator generates electricity.

[0011] As a preferred embodiment of the present invention, the radiator and radiator motor are arranged on the loader as retrofit components.

[0012] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0013] 1. This invention receives the generator power generation signal through a relay and connects the radiator motor circuit when the generator is generating electricity, so that the radiator motor is powered by the battery to achieve continuous heat dissipation, thereby helping to maintain the stable temperature of the working oil circuit.

[0014] 2. This invention addresses the problem of insufficient heat dissipation in the working oil circuit after the engine and pump assembly installation method is changed. It can add and modify the system to reduce equipment failures caused by oil temperature issues and improve the reliability of equipment operation.

[0015] 3. This invention enables controlled start and stop of the radiator motor by using the generator power generation status signal, which can improve the overall working efficiency and safety of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the electrical structure of the cubic loader with a radiator added according to the present invention;

[0017] Figure 2 This is a schematic diagram of the radiator installation of the cubic shovel loader of the present invention. Detailed Implementation

[0018] To make the technical means, creative features, objectives, and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention.

[0019] Example: A cooling system for the working oil circuit of a loader receives the generator's power generation signal through a relay. When the generator generates electricity, the relay is energized, connecting the radiator motor circuit. The radiator motor is powered by a battery, achieving continuous cooling and ensuring stable working oil circuit temperature. This system is suitable for optimizing insufficient cooling after engine modification.

[0020] For example, taking the 1 cubic meter loader at Panlong Lead-Zinc Mine as an example, in order to improve the working efficiency of the loader, the existing 1 cubic meter loader equipped with a BF4L2011 engine was modified by changing the engine model to D91404L. At the same time, the installation method of the variable pump and the dual pump that are matched with the engine was also changed: the original dual pump was installed at the rear end of the rear frame and connected to the engine by a belt. The modified dual pump and variable pump are integrated and directly connected to the engine. As a result, the heat in the working oil circuit cannot be discharged in time during the operation of the loader, causing problems such as excessive oil temperature and frequent equipment failures.

[0021] To address these issues, the research team optimized and modified the loader model by installing an additional cooling system for the working oil circuit and controlling the cooling motor by receiving the generator's power generation signal.

[0022] like Figure 2 As shown, the cooling system includes a radiator added to the loader for cooling the working oil circuit.

[0023] like Figure 1 As shown, the cooling system also includes a radiator motor M2, which is matched with the radiator and is powered by a battery; and a relay KA1 is provided to connect the power supply circuit of the radiator motor M2 when the generator power generation conditions are met, so as to achieve continuous heat dissipation and stabilize the working oil circuit temperature.

[0024] Furthermore, the cooling system also includes the generator G and the multi-function control relay K26; the functions of each pin of the multi-function control relay K26 are as follows: the D+ terminal is connected to the excitation and charging indicator output terminal of the generator; the W+ terminal is connected to the other excitation output terminal of the generator, which is also a signal of the generator's working status; the 15 terminal is connected to the power supply of the ignition switch; the 30 terminal is grounded; the 50 terminal outputs to the control line of the starter solenoid switch M1, which is used to turn on the starter.

[0025] It should be noted that the functions of each pin of generator G are as follows: D+ is the key terminal, which connects to the excitation winding, voltage regulator and charging indicator light, and is a key test point for observing whether the generator has started generating electricity; B+ is the positive output terminal, which outputs rectified DC power and is directly connected to the positive terminal of the battery and the load; B- is the negative output terminal; W+ is a single phase of AC power drawn from the generator stator winding, used to drive instruments such as the tachometer.

[0026] For ease of understanding Figure 1 The electrical structure shown is as follows. Figure 1 Several electrical components are also shown: circuit breaker QF1 is installed between the generator B+ terminal and the power supply bus; diode VD and indicator light HL1 are connected in series in the D+ related circuit of generator G; in addition, Figure 1The load circuit connected to terminal 50 of the multi-function control relay K26 is shown, illustrating the connection relationship between the start output terminal of the multi-function control relay K26 and the start-related circuit.

[0027] exist Figure 1 In the electrical schematic shown, the battery provides the power foundation for the radiator motor M2. The power supply line of the radiator motor M2 is connected in series with the contacts of the relay KA1 to realize the on-off control of the radiator motor M2. The other end of the radiator motor M2 is connected to the ground circuit to form a complete circuit.

[0028] Terminal 15 of the multi-function control relay K26 is connected to the power supply of the ignition switch when it is in the ON position, so that the multi-function control relay K26 has the working power supply conditions when the ignition switch is in the ON position; terminal 30 of the multi-function control relay K26 is grounded, providing a reference ground for the electrical circuit of the multi-function control relay K26, and is used as the 0V reference terminal of the circuit.

[0029] Meanwhile, the D+ terminal of the multi-function control relay K26 is electrically connected to the D+ signal circuit of the generator G, and the W+ terminal of the multi-function control relay K26 is electrically connected to the W+ terminal of the generator G, so as to obtain signals related to the generator's operating status; the B+ terminal of the generator G is connected to the positive terminal of the battery and the load to form a power supply relationship.

[0030] Working principle:

[0031] Before use: When the ignition switch is in the ON position, terminal 15 of the multi-function control relay K26 receives power from the ignition switch, and the multi-function control relay K26 enters the working state; terminal 30 of the multi-function control relay K26 is grounded. In this state, whether the power supply circuit of the radiator motor M2 is connected is determined by the on / off state of the relay KA1.

[0032] In use: After the engine runs and drives the generator G to work, the B+ terminal of the generator G outputs rectified DC power and forms a power supply relationship with the positive terminal of the battery and the vehicle load; the D+ terminal is the key test point for observing whether the generator has started generating electricity, and the W+ terminal is the AC lead-out terminal of one phase of the stator winding.

[0033] After use: When generator G generates electricity, relay KA1 is activated by receiving the signal from the B+ terminal; after relay KA1 is activated, the power supply circuit of radiator motor M2 is connected, and radiator motor M2 is continuously powered by the battery and runs, realizing continuous heat dissipation of the working oil circuit, thereby ensuring the stable temperature of the working oil circuit.

[0034] Through the above structure and working process, the oil temperature problem caused by insufficient heat dissipation of the working oil circuit after the modification of the 1 cubic meter loader is solved, reducing equipment failures caused by oil temperature problems and improving the working efficiency and safety of the equipment.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A cooling system for the working oil circuit of a loader, characterized in that, It includes a radiator, a battery, a generator, a relay, and a radiator motor. The radiator is used to cool the oil in the working oil circuit, and the radiator motor is used to drive the radiator to exchange heat. The power supply circuit of the radiator motor is electrically connected to the battery, and the relay contacts are connected in series in the power supply circuit of the radiator motor. The control terminal of the relay receives the generator's power generation signal to control the relay to engage when the generator is generating electricity, thereby connecting the power supply circuit of the radiator motor and driving the radiator motor to run.

2. The cooling system for the working oil circuit of a loader according to claim 1, characterized in that, The power generation signal is a status signal used to indicate that the generator has entered the power generation state, and the relay is activated when the generator enters the power generation state.

3. The cooling system for the working oil circuit of a loader according to claim 2, characterized in that, It also includes a multi-function control relay, which has a signal terminal for connecting to the generator operating status signal, a power terminal for connecting to the ignition switch power supply, and a grounding terminal for grounding.

4. The cooling system for the working oil circuit of a loader according to claim 3, characterized in that, The multi-functional control relay also has a start output terminal, which is connected to the actuator of the start circuit to turn on the starter.

5. The cooling system for the working oil circuit of a loader according to claim 4, characterized in that, It also includes a circuit breaker, which is installed between the generator's output circuit and the vehicle's power supply bus.

6. The cooling system for the working oil circuit of a loader according to claim 5, characterized in that, It also includes diodes and indicator lights, which are installed in circuits related to the generator's power generation status indication and excitation.

7. The cooling system for the working oil circuit of a loader according to claim 6, characterized in that, The generator is electrically connected to the battery and the vehicle load to charge the battery and supply power to the vehicle load when the generator is generating electricity.

8. The cooling system for the working oil circuit of a loader according to claim 7, characterized in that, The radiator and radiator motor are installed on the loader as retrofit components.

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