Cooling system, control method, control device and new energy engineering machinery

Abstract

The invention relates to the field of new energy engineering machinery, and discloses a cooling system, a control method, a control device and new energy engineering machine.The cooling system comprises a radiator, a water pump, an engine heat exchanger and a retarder heat exchanger, the water inlet end of the water pump is connected with the water outlet end of the radiator, and the engine heat exchanger is used for exchanging heat with an engine; the water inlet end of the engine heat exchanger is connected with the water outlet end of the water pump, the water outlet end of the engine heat exchanger is connected with the water inlet end of the radiator, the retarder heat exchanger is used for exchanging heat with a hydraulic retarder, the water inlet end of the retarder heat exchanger is connected with the water outlet end of the water pump, and the water outlet end of the retarder heat exchanger is connected with the water inlet end of the radiator. According to the cooling system, the engine and the hydraulic retarder share the water pump and the radiator so that cooling and heat dissipation of the engine and the hydraulic retarder can be achieved at the same time, the cooling system is applied to the engineering machine, the manufacturing cost of the engineering machine can be reduced, and the engineering machine has more internal space for arranging other parts.

Description

Technical Field

[0001] The present invention belongs to the field of new energy engineering machinery, and specifically, relates to a cooling system, a control method, a control device and a new energy engineering machinery. Background Art

[0002] In existing engineering machinery, especially new energy engineering machinery, the hydraulic retarder is cooled and dissipated by an independent cooling system, that is, the hydraulic retarder will be equipped with independent radiator, water pump and other components. This will, on the one hand, lead to higher manufacturing costs of the engineering machinery. On the other hand, the layout of the cooling system will occupy more space inside the engineering machinery, which will have a greater impact on the layout of components in the engineering machinery, especially for engineering machinery with compact structure. Summary of the invention

[0003] In view of the above-mentioned deficiencies or defects in the prior art, the present invention provides a cooling system, a control method, a control device and a new energy engineering machinery, aiming to solve the technical problems of high manufacturing cost and large space occupied by the cooling system of the hydraulic retarder.

[0004] To achieve the above object, the present invention provides a cooling system, the cooling system comprising:

[0005] heat sink;

[0006] A water pump, wherein a water inlet end of the water pump is connected to a water outlet end of the radiator;

[0007] An engine heat exchanger, used for exchanging heat with the engine, wherein the water inlet of the engine heat exchanger is connected to the water outlet of the water pump, and the water outlet of the engine heat exchanger is connected to the water inlet of the radiator;

[0008] The retarder heat exchanger is used for exchanging heat with the hydraulic retarder, the water inlet end of the retarder heat exchanger is connected to the water outlet end of the water pump, and the water outlet end of the retarder heat exchanger is connected to the water inlet end of the radiator.

[0009] Optionally, the cooling system further comprises:

[0010] A radiator water inlet pipeline, one end of which is connected to the water inlet of the radiator, and the other end of which is connected to the water outlet of the engine heat exchanger;

[0011] The retarder water outlet pipeline has one end connected to the water outlet end of the retarder heat exchanger and the other end connected to the radiator water inlet pipeline, and the connection node is located between the two ends of the radiator water inlet pipeline.

[0012] Optionally, the radiator water inlet pipeline is provided with a speed limiting valve for limiting the flow rate of the fluid on the pipeline between the water outlet end of the engine heat exchanger and the connection node.

[0013] The present invention also discloses a new energy engineering machinery, comprising the above cooling system.

[0014] The present invention also discloses a control method, wherein the hydraulic retarder is cooled and radiated by the cooling system mentioned above, and the control method comprises:

[0015] Obtain the travel speed of the construction machinery;

[0016] When it is determined that the driving speed is less than a preset speed threshold, the hydraulic retarder is controlled to stop working.

[0017] Optionally, the control method further includes:

[0018] When it is determined that the driving speed is greater than or equal to the speed threshold, the hydraulic retarder is controlled to stop working in response to the accelerator pedal depression signal or the ABS lock signal; when the ABS lock signal and the accelerator pedal depression signal are not obtained, the hydraulic retarder is controlled to start working in response to the brake signal.

[0019] The present invention also provides a control device, which is configured to execute the above control method.

[0020] Optionally, the control device is further configured to:

[0021] In response to the brake signal, when the hydraulic retarder is controlled to start working, a control signal for controlling the braking in the engine cylinder is generated and sent out at the same time.

[0022] Optionally, the control device is further configured to:

[0023] When the hydraulic retarder is controlled to start working, a first prompt signal for prompting the hydraulic retarder to start working is generated and issued at the same time; when the hydraulic retarder is controlled to stop working, a second prompt signal for prompting the hydraulic retarder to stop working is generated and issued at the same time.

[0024] The present invention also provides a new energy engineering machinery, comprising the above-mentioned control device.

[0025] Through the above technical scheme, in the cooling system of the present invention, driven by the water pump, the cold water flowing out from the water outlet of the radiator can be pumped to the engine heat exchanger and the retarder heat exchanger respectively through the water pump to perform heat exchange respectively, and then, the hot water generated after the heat exchange of the engine heat exchanger and the hot water generated after the heat exchange of the retarder heat exchanger are returned to the radiator for heat exchange cooling, and the heat exchange cooling of the engine and the hydraulic retarder can be realized by continuous circulation. That is to say, the cooling system of the present invention can realize the cooling and heat dissipation of the engine and the hydraulic retarder at the same time by sharing the water pump and the radiator for the engine and the hydraulic retarder. When applied to engineering machinery, it can reduce the manufacturing cost of engineering machinery, enable the engineering machinery to have more internal space to arrange other components, and facilitate the layout of the whole machine.

[0026] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0028] In the attached picture:

[0029] Figure 1 is a schematic structural diagram of a cooling system in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 Schematic diagram of the block structure of the cooling system;

[0031] Figure 3 The figure is a flow chart of a control method in one embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1 Radiator

[0034] 2 Water Pump

[0035] 3 Engine heat exchanger

[0036] 4 Retarder heat exchanger

[0037] 5 Radiator water inlet pipe

[0038] 6 Retarder water outlet pipe

[0039] 7 Speed ​​limiting valve

[0040] 8 Engine

[0041] 9 Hydraulic retarder DETAILED DESCRIPTION

[0042] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0044] In the present invention, unless otherwise specified, the directions or positional relationships indicated by directional words such as "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0046] See attached Figure 1 and attached Figure 2 As shown, the first exemplary embodiment of the present invention provides a cooling system for a hydraulic retarder 9, the cooling system comprising:

[0047] Radiator 1;

[0048] A water pump 2, wherein a water inlet end of the water pump 2 is connected to a water outlet end of the radiator 1;

[0049] The engine heat exchanger 3 is used for exchanging heat with the engine 8, the water inlet end of the engine heat exchanger 3 is connected to the water outlet end of the water pump 2, and the water outlet end of the engine heat exchanger 3 is connected to the water inlet end of the radiator 1;

[0050] The retarder heat exchanger 4 has a water inlet connected to a water outlet of the water pump 2 , and a water outlet of the retarder heat exchanger 4 is connected to a water inlet of the radiator 1 .

[0051] In the cooling system, driven by the water pump 2, the cold water flowing out from the water outlet of the radiator 1 can be pumped to the engine heat exchanger 3 and the retarder heat exchanger 4 through the water pump 2 for heat exchange respectively, and then, the hot water generated after the heat exchange of the engine heat exchanger 3 and the hot water generated after the heat exchange of the retarder heat exchanger 4 flow back to the radiator 1 for heat exchange cooling, and the heat exchange cooling of the engine 8 and the hydraulic retarder 9 can be realized by continuous circulation. That is to say, the cooling system of the present invention can realize the cooling and heat dissipation of the engine 8 and the hydraulic retarder 9 at the same time by sharing the water pump 2 and the radiator 1 by the engine 8 and the hydraulic retarder 9. When applied to engineering machinery, it can reduce the manufacturing cost of engineering machinery, enable the engineering machinery to have more internal space to arrange other components, and facilitate the layout of the whole machine.

[0052] Specifically, the water inlet end of the water pump 2 and the water outlet end of the radiator 1, the water inlet end of the engine heat exchanger 3 and the water outlet end of the water pump 2, the water outlet end of the engine heat exchanger 3 and the water inlet end of the radiator 1, the water inlet end of the retarder heat exchanger 4 and the water outlet end of the water pump 2, and the water outlet end of the retarder heat exchanger 4 and the water inlet end of the radiator 1 can be interconnected by pipelines.

[0053] In actual application, the cooling system originally equipped with the engine 8 can be modified, that is, the retarder heat exchanger 4 can be connected to the original cooling circulation pipeline of the engine 8 through pipeline connection, so that the retarder heat exchanger 4 can share the radiator and water pump originally equipped with the engine 8.

[0054] In one embodiment, referring to the attached Figure 1 and attached Figure 2 As shown, the cooling system of the hydraulic retarder 9 also includes:

[0055] A radiator water inlet pipe 5, one end of which is connected to the water inlet of the radiator 1, and the other end of which is connected to the water outlet of the engine heat exchanger 3;

[0056] One end of the retarder water outlet pipeline 6 is connected to the water outlet end of the retarder heat exchanger 4 , and the other end is connected to the radiator water inlet pipeline 5 , and the connection node is located between the two ends of the radiator water inlet pipeline 5 .

[0057] In this way, the hot water flowing out of the water outlet of the retarder heat exchanger 4 can be converged into the radiator water inlet pipe 5 and then enter the radiator 1. In actual application, there is no need to change the existing structure of the radiator 1.

[0058] Specifically, the retarder water outlet pipe 6 and the radiator water inlet pipe 5 can be connected by welding.

[0059] In one embodiment, referring to the attached Figure 2As shown, the radiator water inlet pipeline 5 is provided with a speed limiting valve 7 for limiting the flow rate of the fluid on the pipeline between the water outlet end of the engine heat exchanger 3 and the connection node.

[0060] It is understandable that, under normal circumstances, the water flow velocity in the retarder water outlet pipe 6 is lower than the water flow velocity in the radiator water inlet pipe 5 due to factors such as the diameter of the retarder water outlet pipe 6 being smaller than the diameter of the radiator water inlet pipe 5. This phenomenon will cause the water flow in the retarder water outlet pipe 6 to be difficult to flow into the radiator water inlet pipe 5, thereby affecting the heat exchange of the retarder heat exchanger 4. In this embodiment, the water flow velocity in the radiator water inlet pipe 5 can be limited by the speed limiting effect of the speed limiting valve 7, so that the water flow velocity in the radiator water inlet pipe 5 is basically consistent with the water flow velocity in the retarder water outlet pipe 6. In this way, it can be ensured that the water flow in the retarder water outlet pipe 6 can flow smoothly into the radiator water inlet pipe 5, thereby improving the heat exchange reliability of the retarder heat exchanger 4.

[0061] Furthermore, flow velocity sensors may be respectively arranged in the radiator water inlet pipe 5 and the retarder water outlet pipe 6, and the water flow velocities of the radiator water inlet pipe 5 and the retarder water outlet pipe 6 may be respectively detected by the two flow velocity sensors, and then the speed limiting valve 7 may be controlled according to the detection results of the two flow velocity sensors. In this way, the water flow velocity in the radiator water inlet pipe 5 may be accurately controlled, so that the water flow velocity in the radiator water inlet pipe 5 can be timely adjusted to be consistent with the water flow velocity of the retarder water outlet pipe 6.

[0062] A second exemplary embodiment of the present invention provides a new energy engineering machine, comprising the above-mentioned cooling system.

[0063] See attached Figure 3 As shown, the third exemplary embodiment of the present invention provides a control method for a hydraulic retarder 9, and the hydraulic retarder 9 is cooled and dissipated by the above-mentioned cooling system.

[0064] In one embodiment, the control method includes:

[0065] Obtain the travel speed of the construction machinery;

[0066] When it is determined that the driving speed is less than the preset speed threshold, the hydraulic retarder 9 is controlled to stop working.

[0067] It is understandable that when the construction machinery is traveling at a low speed, the engine 8 is always in a low speed operation state, which will lead to insufficient power of the radiator, and the operation of the hydraulic retarder 9 will occupy a large amount of power of the radiator, resulting in insufficient cooling of the engine 8 and a high temperature state, affecting the normal operation of the engine 8. In this embodiment, when it is determined that the traveling speed of the construction machinery is less than the preset speed threshold, the hydraulic retarder 9 is controlled to stop working. With such a configuration, when the construction machinery is traveling at a low speed, the braking demand can be met by the braking system, and the hydraulic retarder 9 is stopped, which can avoid the situation where the engine 8 is insufficiently cooled and in a high temperature state while ensuring the braking performance.

[0068] In one embodiment, referring to the attached Figure 3 As shown, the control method also includes:

[0069] When it is determined that the driving speed is greater than or equal to the speed threshold, the hydraulic retarder 9 is controlled to stop working in response to the accelerator pedal depression signal or the ABS lock signal. When the ABS lock signal and the accelerator pedal depression signal are not obtained, the hydraulic retarder 9 is controlled to start working in response to the brake signal.

[0070] In this way, on the one hand, it can prevent the uneven distribution of braking force during emergency braking of the construction machinery, which may lead to dangerous problems such as rollover. On the other hand, it can avoid the dangerous situation of the hydraulic retarder 9 accidentally braking when the operator steps on the accelerator pedal.

[0071] A fourth exemplary embodiment of the present invention provides a control device for a hydraulic retarder 9 , the control device being configured to execute the above-mentioned control method.

[0072] In one embodiment, the control device is further configured to:

[0073] In response to the brake signal, when the hydraulic retarder 9 is controlled to start working, a control signal for controlling the braking in the cylinder of the engine 8 is generated and sent at the same time.

[0074] In actual application, the control device can be connected to the engine 8 signal. When controlling the hydraulic retarder 9 to start working, a control signal is synchronously sent to the engine 8, so that the braking in the cylinder of the engine 8 and the braking of the hydraulic retarder 9 complement each other, make up for the insufficient braking force of the hydraulic retarder 9, and improve the braking performance.

[0075] In this embodiment, the control device is further configured to:

[0076] When the hydraulic retarder 9 is controlled to stop operating, a control signal for controlling the engine 8 to stop in-cylinder braking is simultaneously generated and issued.

[0077] In this way, it is possible to avoid the situation where the engine 8 continues to perform in-cylinder braking after the braking is completed.

[0078] In one embodiment, the control device is further configured to:

[0079] When the hydraulic retarder 9 is controlled to start working, a first prompt signal for prompting the hydraulic retarder 9 to start working is generated and issued at the same time. When the hydraulic retarder 9 is controlled to stop working, a second prompt signal for prompting the hydraulic retarder 9 to stop working is generated and issued at the same time.

[0080] In actual application, the control device can be connected to the instrument panel signal, and when the hydraulic retarder 9 is controlled to start working, a first prompt signal is sent to the instrument panel to light up the corresponding prompt light on the instrument panel, thereby prompting the operator that the hydraulic retarder 9 is starting to work. When the hydraulic retarder 9 is controlled to stop working, a second prompt signal is sent to the instrument panel to turn off the corresponding prompt light on the instrument panel, thereby prompting the operator that the hydraulic retarder 9 is stopping working.

[0081] A fifth exemplary embodiment of the present invention provides a new energy engineering machine, comprising the above-mentioned control device.

[0082] New energy engineering machinery can be new energy cranes, new energy pump trucks, etc.

[0083] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cooling system, characterized in that: The cooling system comprises: Radiator (1); A water pump (2), wherein a water inlet end of the water pump (2) is connected to a water outlet end of the radiator (1); An engine heat exchanger (3) is used for exchanging heat with the engine, the water inlet end of the engine heat exchanger (3) is connected to the water outlet end of the water pump (2), and the water outlet end of the engine heat exchanger (3) is connected to the water inlet end of the radiator (1); The retarder heat exchanger (4) is used for exchanging heat with the hydraulic retarder, the water inlet end of the retarder heat exchanger (4) being connected to the water outlet end of the water pump (2), and the water outlet end of the retarder heat exchanger (4) being connected to the water inlet end of the radiator (1).

2. The cooling system according to claim 1, characterized in that: The cooling system further comprises: A radiator water inlet pipeline (5), one end of which is connected to the water inlet end of the radiator (1), and the other end of which is connected to the water outlet end of the engine heat exchanger (3); The retarder water outlet pipeline (6) has one end connected to the water outlet end of the retarder heat exchanger (4) and the other end connected to the radiator water inlet pipeline (5), and the connection node is located between the two ends of the radiator water inlet pipeline (5).

3. The cooling system according to claim 2, characterized in that: The radiator water inlet pipeline (5) is provided with a speed limiting valve (7) for limiting the flow rate of the fluid on the pipeline between the water outlet end of the engine heat exchanger (3) and the connection node.

4. A new energy engineering machinery, characterized in that: Comprising a cooling system according to any one of claims 1 to 3.

5. A control method for a hydraulic retarder, wherein the hydraulic retarder is cooled and radiated by a cooling system according to any one of claims 1 to 3, characterized in that: The control method comprises: Obtain the travel speed of the construction machinery; When it is determined that the driving speed is less than a preset speed threshold, the hydraulic retarder is controlled to stop working.

6. The control method according to claim 5, characterized in that: The control method further comprises: When it is determined that the driving speed is greater than or equal to the speed threshold, the hydraulic retarder is controlled to stop working in response to the accelerator pedal depression signal or the ABS lock signal; when the ABS lock signal and the accelerator pedal depression signal are not obtained, the hydraulic retarder is controlled to start working in response to the brake signal.

7. A control device, characterized in that: The control device is configured to execute the control method according to claim 5 or 6.

8. The control device according to claim 7, characterized in that: The control device is also configured to: In response to the brake signal, when the hydraulic retarder is controlled to start working, a control signal for controlling the braking in the engine cylinder is generated and sent out at the same time.

9. The control device according to claim 7, characterized in that: The control device is also configured to: When the hydraulic retarder is controlled to start working, a first prompt signal for prompting the hydraulic retarder to start working is generated and issued at the same time; when the hydraulic retarder is controlled to stop working, a second prompt signal for prompting the hydraulic retarder to stop working is generated and issued at the same time.

10. A new energy engineering machinery, characterized in that: Comprising a control device according to any one of claims 7 to 9.

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