Heat dissipation system of a hydraulic walking power station and the hydraulic walking power station

Abstract

The present invention discloses a heat dissipation system for a hydraulic walking power station and a hydraulic walking power station, belonging to the field of construction machinery. The heat dissipation system includes a main fuel tank, a fan pump, an auxiliary pump, a fan motor, a fan, a radiator, and an oil return filter. The main fuel tank, the fan pump, the fan motor, the radiator, and the oil return filter are connected in sequence, and the oil outlet of the oil return filter is connected to the main fuel tank. The fan is arranged at the output end of the fan motor and is driven by the fan motor to rotate. The oil suction port of the auxiliary pump is connected to the main fuel tank, and the oil outlet of the auxiliary pump is connected to the oil inlet of the radiator, thereby assisting the fan pump in heat dissipation. The hydraulic walking power station includes the heat dissipation system proposed by the present invention. By using the heat dissipation system of the present invention, the hydraulic walking power station can dissipate heat efficiently and reliably, thereby avoiding failures of the engine and hydraulic system of the hydraulic walking power station due to overheating.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat dissipation, and particularly relates to a heat dissipation system for a hydraulic walking power station and a hydraulic walking power station. Background Art

[0002] Open-pit drills are generally used for drilling blast holes in open-pit mines. Currently, open-pit drills can be divided into two categories according to the power source: electric drills driven by electric motors and diesel drills driven by diesel engines.

[0003] Electric drills rely on high-voltage electricity above six kilovolts to provide energy and need to be connected to high-voltage cables at all times when walking, which is very inconvenient for long-distance walking. When there are faults in the engine or hydraulic system of diesel drills, the drills cannot be transferred in time either. A hydraulic walking power station is a special device that can provide additional power for electric drills or diesel drills. When the drill cannot move, the hydraulic walking power station can be used to drive the drill to transfer the site.

[0004] A hydraulic walking power station is driven by an engine to drive a hydraulic pump set to provide hydraulic power. When the engine and hydraulic system are working, heat generation is inevitable. Therefore, for a hydraulic walking power station, solving the heat dissipation problem is very important. Because the working environment of open-pit drills is relatively harsh, it is very likely that due to the failure of the hydraulic pump of the heat dissipation system, the reliability of the heat dissipation system is insufficient and effective heat dissipation cannot be carried out, resulting in the failure of the hydraulic system of the walking power station due to heat. Therefore, the design of the heat dissipation system for a hydraulic walking power station is very important. Summary of the Invention

[0005] Technical Problem: Aiming at the heat dissipation problem of a hydraulic walking power station, the present invention provides a heat dissipation system for a hydraulic walking power station and a hydraulic walking power station including the heat dissipation system, so that when the hydraulic walking power station is working, the engine and hydraulic system of the hydraulic walking power station can be efficiently and reliably cooled.

[0006] Technical Solution: On the one hand, the present invention provides a heat dissipation system for a hydraulic walking power station, including a main fuel tank, a fan pump, an auxiliary pump, a fan motor, a fan, a radiator, and an oil return filter. The main fuel tank, the fan pump, the fan motor, the radiator, and the oil return filter are connected in sequence, and the oil outlet of the oil return filter is connected to the main fuel tank; the fan is arranged at the output end of the fan motor and is driven by the fan motor to rotate; the suction port of the auxiliary pump is connected to the main fuel tank, and the oil outlet of the auxiliary pump is connected to the oil inlet of the radiator to assist the fan pump in heat dissipation.

[0007] Further, a first reversing valve is arranged between the oil outlet of the auxiliary pump and the oil inlet of the radiator, and an external oil supply interface is arranged on the first reversing valve, which can be used for supplying oil to the outside.

[0008] A second reversing valve is provided between the oil suction port of the auxiliary pump and the main fuel tank, and an auxiliary fuel tank is connected to the second reversing valve.

[0009] When the heat dissipation system supplies oil to the outside, by switching the states of the first reversing valve and the second reversing valve, the auxiliary pump directly sucks oil from the auxiliary fuel tank and supplies oil to the outside through the external oil supply interface on the first reversing valve.

[0010] Further, both the first reversing valve and the second reversing valve are two-position three-way hydraulically controlled reversing valves, and are switched by providing hydraulic power through a pilot control oil source connected to the first reversing valve and the second reversing valve.

[0011] Further, a first one-way valve is provided in parallel on the fan motor.

[0012] Further, a second one-way valve is provided in parallel on the radiator.

[0013] Further, an overflow valve is provided at the oil outlet of the auxiliary pump.

[0014] Further, a third one-way valve is provided between the oil outlet of the auxiliary pump and the first reversing valve.

[0015] Further, the fan pump is a variable pump, and a proportional valve is provided on the fan pump to control the output flow of the fan pump through the proportional valve, thereby adjusting the rotational speed of the fan.

[0016] Further, the heat dissipation system further includes a fan speed control system, and the fan speed control system includes a hydraulic oil temperature sensor, an ambient temperature sensor, an engine control module, and a fan speed controller;

[0017] The hydraulic oil temperature sensor is used to collect the hydraulic oil temperature and send the hydraulic oil temperature to the fan speed controller;

[0018] The ambient temperature sensor is used to collect the ambient temperature and send the ambient temperature to the fan speed controller;

[0019] The engine control module can collect the engine speed, the cooling water temperature, and the intake air temperature, and send the collected engine speed, cooling water temperature, and intake air temperature to the fan speed controller;

[0020] The fan speed controller can send a PWM electrical signal to the proportional valve according to the hydraulic oil temperature, the ambient temperature, the engine speed, the cooling water temperature, and the intake air temperature, thereby controlling the output flow of the fan pump to adjust the fan speed.

[0021] On the other hand, a hydraulic walking power station is provided, and the hydraulic walking power station includes the heat dissipation system of the hydraulic walking power station.

[0022] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0023] (1) When using the heat dissipation system in the embodiment of the present invention to dissipate heat from a hydraulic walking power station, after the engine is started, it drives the fan pump and the auxiliary pump to rotate. The fan pump outputs high-pressure oil to the fan motor. Under the action of the high-pressure oil, the fan motor drives the fan to rotate, and the output air volume blows towards the radiator to achieve the heat dissipation function. The low-pressure oil at the oil outlet of the fan motor enters the radiator, then enters the return oil filter, and finally enters the main fuel tank. At the same time, the hydraulic oil output by the auxiliary pump directly enters the radiator and, together with the hydraulic oil output by the fan pump, realizes the heat dissipation of the hydraulic system. By using the heat dissipation system in the embodiment of the present invention and assisting the fan pump with the auxiliary pump for heat dissipation, it is possible to achieve efficient heat dissipation of the hydraulic system of the hydraulic walking power station. Moreover, by using the auxiliary pump for auxiliary heat dissipation, the reliability of the heat dissipation system is greatly improved, so that the heat dissipation system can dissipate heat efficiently and reliably during operation, can be applied to harsh working conditions, and further better protects the engine and hydraulic system of the walking power station, preventing the hydraulic walking power station from being damaged due to overheating.

[0024] (2) The heat dissipation system provided in the embodiment of the present invention can not only dissipate heat from the engine and hydraulic system on the hydraulic walking power station efficiently and reliably, but also can be used as an emergency auxiliary hydraulic system. When the external hydraulic mechanism fails to work due to a failure of a hydraulic pump or the like, it can be directly connected to the heat dissipation system of the present invention to temporarily provide power for the external hydraulic mechanism. Therefore, the heat dissipation system in the embodiment of the present invention has diverse functions and good practicability. Description of the Drawings

[0025] Figure 1 is the schematic diagram of the heat dissipation system of the hydraulic walking power station in the embodiment of the present invention;

[0026] Figure 2 is the system block diagram of the fan speed control system in the embodiment of the present invention.

[0027] In the figure: 1, main fuel tank; 2, fan pump; 3, auxiliary pump; 4, fan motor; 5, fan; 6, radiator; 7, return oil filter; 8, first reversing valve; 9, second reversing valve; 10, auxiliary fuel tank; 11, pilot control oil source; 12, first check valve; 13, second check valve; 14, relief valve; 15, third check valve; 16, proportional valve; 17, hydraulic oil temperature sensor; 18, ambient temperature sensor; 19, engine control module; 20, fan speed controller; 21, external oil supply interface. Detailed Embodiments

[0028] The present invention will be further described below in conjunction with embodiments and the accompanying drawings of the specification. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] At the same time, it should be understood that, for the sake of convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0030] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification.

[0031] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0032] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] Moreover, for terms such as "first", "second", etc., they are only for the convenience of description and cannot be construed as limitations on the quantity, etc. And the mentioned "connection" is defined in a broad sense, which can represent both "mechanical connection" and "electrical connection", etc.

[0034] Figure 1 The schematic diagram of an embodiment of the heat dissipation system of the hydraulic walking power station of the present invention is shown. In combination Figure 1 As shown, the heat dissipation system includes a main fuel tank 1, a fan pump 2, an auxiliary pump 3, a fan motor 4, a fan 5, a radiator 6, and an oil return filter 7. Among them, the main fuel tank 1, the fan pump 2, the fan motor 4, the radiator 6, and the oil return filter 7 are connected in sequence, and the oil outlet of the oil return filter 7 is connected to the main fuel tank 1; the fan 5 is arranged at the output end of the fan motor 4, and the fan 5 is driven to rotate by the fan motor 4; the oil suction port of the auxiliary pump 3 is connected to the main fuel tank 1, and the oil outlet of the auxiliary pump 3 is connected to the oil inlet of the radiator 6, so as to assist the fan pump 2 in heat dissipation.

[0035] When using the heat dissipation system in the embodiment of the present invention to dissipate heat from a hydraulic walking power station, after the engine starts, it drives the fan pump 2 and the auxiliary pump 3 to rotate. The fan pump 2 outputs high-pressure oil to the fan motor. Under the action of the high-pressure oil, the fan motor 4 drives the fan to rotate, and the output air volume blows towards the radiator 6 to achieve the heat dissipation function. The low-pressure oil at the oil outlet of the fan motor 4 enters the radiator 6, then enters the return oil filter 7, and finally enters the main fuel tank 1. At the same time, the hydraulic oil output by the auxiliary pump 3 directly enters the radiator, and together with the hydraulic oil output by the fan pump 2, it realizes the heat dissipation of the hydraulic system. By using the heat dissipation system in the embodiment of the present invention, the auxiliary pump 3 assists the fan pump 2 to dissipate heat, thereby enabling efficient heat dissipation of the hydraulic system of the hydraulic walking power station.

[0036] Since the working environment of the hydraulic walking power station is harsh when providing power for an electric drill, it may cause the fan pump 2 to malfunction. When the fan pump 2 fails and the fan 5 rotates slowly or stops rotating, it is difficult to reliably dissipate heat from the engine and the hydraulic system only relying on the fan pump 2 at this time. However, by using the heat dissipation system in the embodiment of the present invention, due to the assistance of the auxiliary pump 3, efficient heat dissipation can still be maintained, so that the heat dissipation system still has strong heat dissipation ability. Therefore, the reliability of the heat dissipation system is greatly improved, making the heat dissipation system efficient and reliable, capable of adapting to harsh working conditions, and further being able to better protect the engine and the hydraulic system of the walking power station, preventing damage to the hydraulic walking power station caused by overheating.

[0037] In the embodiment of the present invention, a diesel engine is configured on the walking power station, which can be used to drive the fan pump 2 and the auxiliary pump 3 to work. Usually, the fan pump 2 and the auxiliary pump 3 are mechanically connected, which is convenient for driving by one engine. And the auxiliary pump 3 is a fixed-displacement pump, with high reliability during operation, thus improving the reliability of the entire heat dissipation system.

[0038] In an embodiment of the present invention, a first reversing valve 8 is provided between the oil outlet of the auxiliary pump 3 and the oil inlet of the radiator 6. An external oil supply interface 21 is provided on the first reversing valve 8, which can be used to supply oil to the outside. A second reversing valve 9 is provided between the oil suction port of the auxiliary pump 3 and the main fuel tank 1, and an auxiliary fuel tank 10 is connected to the second reversing valve 9;

[0039] Among them, the first reversing valve 8 and the second reversing valve 9 can adopt two-position three-way hydraulic control reversing valves. A pilot control oil source 11 is connected to the first reversing valve 8 and the second reversing valve 9. By providing hydraulic power through the pilot control oil source 11, the first reversing valve 8 and the second reversing valve 9 are controlled to reverse.

[0040] When the heat dissipation system supplies oil to the outside, by switching the states of the first reversing valve 8 and the second reversing valve 9, the auxiliary pump 3 directly sucks oil from the auxiliary oil tank 10 and supplies oil to the outside through the external oil supply interface 21 on the first reversing valve 8.

[0041] Therefore, in the embodiments of the present invention, the heat dissipation system can not only dissipate heat for the hydraulic system of the hydraulic walking power station. At the same time, when the external hydraulic mechanism fails to work due to faults in the hydraulic pump or the like, the heat dissipation system of the present invention can also serve as an emergency auxiliary hydraulic system. The external hydraulic system is directly connected to the external oil supply interface 21 of the first reversing valve 8, and then the first reversing valve 8 and the second reversing valve 9 are switched by the pilot control oil source 11. The auxiliary pump 3 directly sucks hydraulic oil from the auxiliary oil tank 10 to supply oil to the external hydraulic mechanism, and does not affect the heat dissipation system for heat dissipation.

[0042] Further, in the embodiments of the present invention, a first one-way valve 12 is arranged in parallel on the fan motor 4. When the machine stops, the fan 5 cannot stop rotating immediately under the action of inertia. The fan 5 will drive the fan motor 4 to continue rotating for a period of time. The fan motor 4 will generate cavitation because there is no continuous input of hydraulic oil at the oil inlet. The first one-way valve 12 can supplement the hydraulic oil at the oil outlet of the fan motor 4 to the oil inlet of the fan motor 4 to prevent the fan motor 4 from being damaged due to cavitation.

[0043] Further, in the embodiments of the present invention, a second one-way valve 13 is arranged in parallel on the radiator 6. When the resistance of the radiator 6 becomes too large to a certain extent due to reasons such as low temperature of the hydraulic oil and poor internal channels of the radiator 6, the hydraulic oil will directly enter the main oil tank 1 from the second one-way valve 13 without passing through the radiator 6 to prevent the radiator 6 from bursting due to excessive pressure.

[0044] In an embodiment of the present invention, a relief valve 14 is arranged at the oil outlet of the auxiliary pump 3 to prevent the working pressure of the auxiliary pump 3 from exceeding the rated pressure, thereby playing a role in protecting against high-pressure overflow. When the working pressure of the auxiliary pump 3 exceeds the rated pressure, the high-pressure oil will enter the main oil tank 1 through the relief valve 14 to protect the auxiliary pump 3.

[0045] Further, in an embodiment of the present invention, a third one-way valve 15 is arranged between the oil outlet of the auxiliary pump 3 and the first reversing valve 8 to prevent the high-pressure oil from flowing back and impacting the auxiliary pump 3 and causing damage to it when the auxiliary pump 3 is working.

[0046] In a preferred embodiment of the present invention, the fan pump 2 is a variable pump, and a proportional valve 16 is arranged on the fan pump 2. The output flow of the fan pump 2 is controlled by the proportional valve 16 to adjust the rotational speed of the fan 5. Therefore, when the hydraulic walking power station is applied in different climate environments.

[0047] To this end, in an embodiment of the present invention, the heat dissipation system further includes a fan speed control system, which can realize the automatic control of the fan speed. Specifically, as Figure 2 shown, the fan speed control system includes a hydraulic oil temperature sensor 17, an ambient temperature sensor 18, an engine control module 19, and a fan speed controller 20. Among them, the hydraulic oil temperature sensor 17 is used to collect the hydraulic oil temperature and send the hydraulic oil temperature to the fan speed controller 20; the ambient temperature sensor 18 is used to collect the ambient temperature and send the ambient temperature to the fan speed controller 20; the engine control module 19 can collect the engine speed, the cooling water temperature, and the intake air temperature, and send the collected engine speed, cooling water temperature, and intake air temperature to the fan speed controller 20. The fan speed controller 20 can send a PWM electrical signal to the proportional valve 16 according to the hydraulic oil temperature, the ambient temperature, the engine speed, the cooling water temperature, and the intake air temperature, so as to control the output flow of the fan pump 2 and adjust the speed of the fan 5.

[0048] Through the fan speed control system, the heat dissipation system of the present invention can be applied to different environments. Especially when the weather is cold, the fan pump 2 will automatically reduce the output of hydraulic oil, thereby reducing the speed of the fan 5. In this way, the hydraulic oil entering the radiator 6 and the oil return filter 7 will also become less. For the entire hydraulic walking power station, the filtering capacity of the hydraulic system is too small. At this time, the auxiliary pump 3 outputs hydraulic oil and directly enters the radiator 6 and the oil return filter 7 from the oil outlet of the fan motor 4, thus ensuring the hydraulic oil filtering capacity in cold weather. Therefore, in harsh environments, the heat dissipation system in the embodiment of the present invention can work reliably.

[0049] In addition, in the embodiment of the present invention, a hydraulic walking power station is further provided. The hydraulic walking power station includes the heat dissipation system proposed in the embodiment of the present invention, so that the hydraulic walking power station has efficient and reliable heat dissipation performance and can provide walking power for an open-pit drill under harsh working conditions.

[0050] So far, the present invention has been described in detail. In order to avoid obscuring the concept of the present invention, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0051] The description of the present invention is given for purposes of illustration and description, and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A heat dissipation system for a hydraulic walking power station, characterized in that, It includes a main fuel tank (1), a fan pump (2), an auxiliary pump (3), a fan motor (4), a fan (5), a radiator (6), and a return oil filter (7). The main fuel tank (1), the fan pump (2), the fan motor (4), the radiator (6), and the return oil filter (7) are connected in sequence, and the oil outlet of the return oil filter (7) is connected to the main fuel tank (1). The fan (5) is arranged at the output end of the fan motor (4), and the fan (5) is driven to rotate by the fan motor (4). The oil suction port of the auxiliary pump (3) is connected to the main fuel tank (1), and the oil outlet of the auxiliary pump (3) is connected to the oil inlet of the radiator (6), so as to assist the fan pump (2) in heat dissipation. A first reversing valve (8) is arranged between the oil outlet of the auxiliary pump (3) and the oil inlet of the radiator (6). An external oil supply interface (21) is arranged on the first reversing valve (8), which can be used to supply oil to the outside. A second reversing valve (9) is arranged between the oil suction port of the auxiliary pump (3) and the main fuel tank (1). An auxiliary fuel tank (10) is connected to the second reversing valve (9). When the heat dissipation system supplies oil to the outside, by switching the states of the first reversing valve (8) and the second reversing valve (9), the auxiliary pump (3) directly sucks oil from the auxiliary fuel tank (10) and supplies oil to the outside through the external oil supply interface (21) on the first reversing valve (8).

2. The heat dissipation system according to claim 1, characterized in that, Both the first reversing valve (8) and the second reversing valve (9) are two-position three-way hydraulic control reversing valves, and are switched by providing hydraulic power through a pilot control oil source (11) connected to the first reversing valve (8) and the second reversing valve (9).

3. The heat dissipation system according to claim 1, wherein A first one-way valve (12) is arranged in parallel on the fan motor (4).

4. The heat dissipation system according to claim 1, wherein, A second one-way valve (13) is arranged in parallel on the radiator (6).

5. The heat dissipation system according to claim 1, wherein An overflow valve (14) is arranged at the oil outlet of the auxiliary pump (3).

6. The heat dissipation system according to claim 1, wherein A third one-way valve (15) is arranged between the oil outlet of the auxiliary pump (3) and the first reversing valve (8).

7. The heat dissipation system according to any one of claims 1-6, characterized in that, The fan pump (2) is a variable pump. A proportional valve (16) is arranged on the fan pump (2), and the output flow of the fan pump (2) is controlled by the proportional valve (16) to adjust the rotation speed of the fan (5).

8. The heat dissipation system according to claim 7, wherein The heat dissipation system further includes a fan speed control system. The fan speed control system includes a hydraulic oil temperature sensor (17), an ambient temperature sensor (18), an engine control module (19), and a fan speed controller (20). The hydraulic oil temperature sensor (17) is used to collect the hydraulic oil temperature and send the hydraulic oil temperature to the fan speed controller (20). The ambient temperature sensor (18) is used to collect the ambient temperature and send the ambient temperature to the fan speed controller (20). The engine control module (19) can collect the engine speed, the cooling water temperature, and the intake air temperature, and send the collected engine speed, cooling water temperature, and intake air temperature to the fan speed controller (20). The fan speed controller (20) can send a PWM electrical signal to the proportional valve (16) according to the hydraulic oil temperature, ambient temperature, engine speed, cooling water temperature, and intake air temperature, so as to control the output flow rate of the fan pump (2) and adjust the rotational speed of the fan (5).

9. A hydraulic walking power station, characterized in that, A heat dissipation system including the hydraulic walking power station according to any one of claims 1-8.

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