Efficient cooling system of hydraulic retarder

Abstract

The utility model relates to the technical field of heat dissipation of hydraulic retarders, in particular to an efficient heat dissipation system of a hydraulic retarder. Comprising a radiator, the radiator is connected with an engine through a third main pipe, the engine is connected with a hydraulic retarder through a second main pipe, the hydraulic retarder is connected with the radiator through a first main pipe, a three-way adjusting valve is installed on the first main pipe, and the three-way adjusting valve is communicated with the third main pipe through a fourth branch pipe; a first branch pipe is further connected to the first main pipe in parallel, the two ends of the first branch pipe are located on the two sides of the three-way adjusting valve respectively, and a first bypass valve is further installed on the first branch pipe. And the cooling pump is used for providing circulating power for the circulating system. By means of the structure, under the condition that a vehicle is on a long downhill road surface, the heat dissipation efficiency of the heat dissipation circulation system of the hydraulic retarder can be improved, and therefore efficient and stable braking of the hydraulic retarder is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of hydraulic retarders, in particular to a high-efficiency heat dissipation system of a hydraulic retarder. Background Art

[0002] The heat dissipation performance of the hydraulic retarder is a key factor in ensuring stable and continuous braking of the vehicle. In the prior art, after the coolant flows out of the radiator, it will first flow through the engine for heat exchange, and then the coolant will flow from the engine to the hydraulic retarder for heat exchange. After the coolant flows out of the hydraulic retarder, it will flow back to the radiator for heat exchange, thereby realizing the heat dissipation cycle of the hydraulic retarder.

[0003] In daily use of the hydraulic retarder, the existing technology can well meet the heat dissipation requirements of the hydraulic retarder. However, in some special cases, when the hydraulic retarder is used for a long time, in order not to affect the braking effect of the hydraulic retarder, it is necessary to improve the heat dissipation efficiency. At this time, the existing technology cannot meet the heat exchange efficiency required by the hydraulic retarder, resulting in a decrease in the continuous braking effect of the hydraulic retarder. Utility Model Content

[0004] In view of the above problems, the utility model provides a high-efficiency heat dissipation system for a hydraulic retarder to solve the problem that the prior art cannot meet the heat exchange efficiency required for the hydraulic retarder under long-term use, thereby causing a decrease in the continuous braking effect of the hydraulic retarder.

[0005] The utility model is realized by using the following technical scheme: a high-efficiency heat dissipation system for a hydraulic retarder, comprising a radiator, wherein the radiator is connected to an engine through a third main pipe, the engine is connected to a hydraulic retarder through a second main pipe, the hydraulic retarder is connected to a radiator through a first main pipe, a three-way regulating valve is installed on the first main pipe, and the three-way regulating valve is connected to the third main pipe through a fourth branch pipe; a first branch pipe is also connected in parallel to the first main pipe, two ends of the first branch pipe are respectively located on both sides of the three-way regulating valve, and a first bypass valve is also installed on the first branch pipe; and a cooling pump for providing circulation power for a circulation system is also included.

[0006] Through the above structure, when the vehicle is on a long downhill road, the heat dissipation efficiency of the hydraulic retarder heat dissipation circulation system can be improved, thereby maintaining efficient and stable braking of the hydraulic retarder.

[0007] Furthermore, the cooling pump is installed on the third main pipe.

[0008] Furthermore, the third main pipe is connected to the second main pipe through a third branch pipe, and a third bypass valve is installed on the third branch pipe. The design of the third branch pipe reduces the head waste of the cooling system when the vehicle is on a long downhill road without affecting the heat dissipation of the engine, thereby improving the heat dissipation efficiency of the entire cooling system.

[0009] Furthermore, the connection point between the third branch pipe and the third main pipe is located between the cooling pump and the engine.

[0010] Furthermore, the second main pipe is connected to the first main pipe through a second branch pipe, and a second bypass valve is installed on the second branch pipe. The design of the second branch pipe can reduce the head loss of the coolant flowing through the hydraulic retarder under normal road conditions, thereby further improving the heat dissipation efficiency of the entire heat dissipation system.

[0011] Furthermore, the connection between the second branch pipe and the second main pipe is located between the engine and the third branch pipe, and the connection between the second branch pipe and the first main pipe is located between the three-way regulating valve and the hydraulic retarder.

[0012] Furthermore, the first bypass valve, the second bypass valve and the third bypass valve are three-valve integrated structure. With the above structure, the oil circuit is easier to operate.

[0013] In summary, the beneficial effects of the present invention are:

[0014] 1. The heat dissipation efficiency of the hydraulic retarder is improved when it is used for a long time by providing a first branch pipe connected in parallel with the three-way regulating valve and a third branch pipe connected in parallel with the engine.

[0015] 2. By connecting a second branch pipe in parallel with the hydraulic retarder, the heat dissipation efficiency of the heat dissipation circulation system is improved when the vehicle is driving normally.

[0016] 3. By combining the first bypass valve, the second bypass valve and the third bypass valve into a main valve, the device is more convenient to operate during actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall pipeline connection of the utility model;

[0018] Figure 2 This is a schematic diagram of the pipeline connection for the fourth branch;

[0019] Figure 3 This is a schematic diagram of the pipeline connection for the second branch;

[0020] Figure 4 This is a schematic diagram of the pipeline connection for the third branch.

[0021] In the figure: 1- radiator; 2- first main pipe; 3- first bypass valve; 4- first branch pipe; 5- second branch pipe; 6- second bypass valve; 7- second main pipe; 8- hydraulic retarder; 9- third bypass valve; 10- third branch pipe; 11- engine; 12- cooling pump; 13- fourth branch pipe; 14- third main pipe; 15- three-way regulating valve. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0025] like Figure 1 , Figure 2 As shown, the utility model provides a hydraulic retarder efficient heat dissipation system, including a radiator 1, the coolant outlet of the radiator 1 is connected to the coolant inlet of the engine 11 through the third main pipe 14, the coolant outlet of the engine 11 is connected to the coolant inlet of the hydraulic retarder 8 through the second main pipe 7, the coolant outlet of the hydraulic retarder 8 is connected to the coolant inlet of the radiator 1 through the first main pipe 2, and the coolant forms a circulation through the connection of the above pipelines. A cooling pump 12 for providing power for the entire coolant circulation is also installed on the third main pipe 14.

[0026] A three-way regulating valve 15 is also installed on the first main pipe 2. The first interface and the second interface of the three-way regulating valve 15 are respectively connected to the first main pipe 2 on both sides thereof. The third interface of the three-way regulating valve 15 is connected to the third main pipe 14 between the radiator 1 and the cooling pump 12 through the fourth branch pipe 13. A branch pipe is also connected in parallel to the first main pipe 2. The inlet of the first branch pipe 4 is connected to the first main pipe 2 between the three-way regulating valve 15 and the hydraulic retarder 8. The inlet of the first branch pipe 4 is connected to the first main pipe 2 between the three-way regulating valve 15 and the radiator 1. A first bypass valve 3 for controlling the opening and closing of the first branch pipe 4 is also installed on the first branch pipe 4.

[0027] Under normal use, by adding a three-way regulating valve 15, when the coolant flows back through the first main pipe 2, a part of it will flow through the fourth branch pipe 13 to the third main pipe 14 to enter the circulation, and the coolant flowing through the fourth branch pipe 13 will dissipate heat in the pipe by itself, thereby achieving cooling. Through the design of the fourth branch pipe 13, the coolant is divided into two parts when reflux heat dissipation is performed, thereby improving the heat dissipation efficiency of the coolant in the device.

[0028] When it is hot in summer and the vehicle is driving down a long slope, the hydraulic retarder 8 needs to work for a long time, so the heat generated by the hydraulic retarder 8 is relatively high. In order to maintain the normal and efficient use of the hydraulic retarder 8, it is necessary to improve the heat dissipation efficiency of the entire heat dissipation circulation system. Before the coolant flows to the three-way regulating valve 15, a first branch pipe 4 is provided to divert it, so that part of the coolant flows through the first branch pipe 4 to the first main pipe 2 near one end of the radiator 1, and the other part flows through the three-way regulating valve 15 for diversion. When it is necessary to improve the heat dissipation efficiency of the heat dissipation system, the first bypass valve 3 is opened, so that the proportion of coolant flowing into the radiator 1 is greater, and the proportion of coolant flowing through the fourth branch pipe 13 is reduced, thereby improving the use efficiency of the radiator 1, and then improving the overall heat dissipation efficiency; and the reduction of coolant flowing through the fourth branch pipe 13 will also improve the heat dissipation efficiency of the coolant in the fourth branch pipe 13. Through the design of the first branch pipe 4, the heat dissipation efficiency of the device is objectively improved when the hydraulic retarder 8 is used for a long time.

[0029] like Figure 1 , Figure 3 As shown, the third main pipe 14 is connected to the second main pipe 7 via a third branch pipe 10 , a third bypass valve 9 is installed on the third branch pipe 10 , and the connection point between the third branch pipe 10 and the third main pipe 14 is located between the cooling pump 12 and the engine 11 .

[0030] When the engine 11 rotates at a low speed and the use of the hydraulic retarder 8 increases, that is, the heat generation of the engine 11 is low and the heat generation of the hydraulic retarder 8 is high, since the heat exchange pipeline in the engine 11 is long, if the coolant flows through the engine 11 and then flows to the hydraulic retarder 8, it will cause a waste of lift. Therefore, through the diversion of the third branch pipe 10, part of the coolant passes through the engine 11 to cool the engine 11, and then flows through the hydraulic retarder 8 to cool it, and another part does not flow through the engine 11 and directly flows into the hydraulic retarder 8 to cool it, thereby reducing the waste of lift and further improving the heat dissipation efficiency of the entire heat dissipation circulation system.

[0031] like Figure 1 , Figure 4As shown, the second main pipe 7 is also connected to the first main pipe 2 through the second branch pipe 5, and a second bypass valve 6 is also installed on the second branch pipe 5. The connection between the second branch pipe 5 and the second main pipe 7 is located between the engine 11 and the outlet of the third branch pipe 10, and the connection between the second branch pipe 5 and the first main pipe 2 is located between the three-way regulating valve 15 and the hydraulic retarder 8.

[0032] When the vehicle is running normally on a flat road, the speed of the engine 11 is high, and the use of the hydraulic retarder 8 is reduced, that is, the heat generation of the engine 11 is high, and the heat generation of the hydraulic retarder 8 is reduced. At this time, the coolant flowing out of the engine 11 is divided by the diversion of the second branch pipe 5, and a part of it flows directly to the first main pipe 2 through the second branch pipe 5, while the other part needs to flow through the hydraulic retarder 8 and then flow into the first main pipe 2. In this way, the waste of the head of the coolant flowing through the second main pipe 7 is reduced, and the heat dissipation of the engine 11 and the hydraulic retarder 8 is not affected, thereby further improving the heat dissipation efficiency of the entire heat dissipation circulation system.

[0033] As a further illustration of this example, the first bypass valve 3, the second bypass valve 6, and the third bypass valve 9 are three-valve integrated structures, and the first bypass valve 3, the second bypass valve 6, and the third bypass valve 9 together constitute a main valve. Controlling the three bypass valves through a main valve makes the operation simpler.

[0034] In the initial state, the first bypass valve 3 and the third bypass valve 9 are closed, and the second bypass valve 6 is open. This state corresponds to the vehicle driving on a normal road, the heat generation of the engine 11 is high, and the heat generation of the hydraulic retarder 8 is low. When the main valve rotates 90°, the first bypass valve 3 and the third bypass valve 9 are open, and the second bypass valve 6 is closed. This state corresponds to the vehicle being in a downhill state for a long time, and the heat generation of the engine 11 is high, and the heat generation of the hydraulic retarder 8 is low.

[0035] In summary, the utility model provides a high-efficiency heat dissipation system for a hydraulic retarder, which improves the heat dissipation efficiency of the hydraulic retarder 8 when used for a long time by providing a first branch pipe 4 connected in parallel with a three-way regulating valve 15 and a third branch pipe 10 connected in parallel with an engine 11; improves the heat dissipation efficiency of the heat dissipation circulation system when the vehicle is driving normally by providing a second branch pipe 5 connected in parallel with the hydraulic retarder 8; and combines the first bypass valve 3, the second bypass valve 6 and the third bypass valve 9 into a main valve design, making the device more convenient to operate during actual use.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A high-efficiency heat dissipation system for a hydraulic retarder, characterized in that: The invention comprises a radiator (1), wherein the radiator (1) is connected to an engine (11) via a third main pipe (14), the engine (11) is connected to a hydraulic retarder (8) via a second main pipe (7), the hydraulic retarder (8) is connected to the radiator (1) via a first main pipe (2), a three-way regulating valve (15) is installed on the first main pipe (2), the three-way regulating valve (15) is connected to the third main pipe (14) via a fourth branch pipe (13); a first branch pipe (4) is also connected in parallel to the first main pipe (2), the two ends of the first branch pipe (4) are respectively located on both sides of the three-way regulating valve (15), and a first bypass valve (3) is also installed on the first branch pipe (4); and the invention also comprises a cooling pump (12) for providing circulation power for the circulation system.

2. The high-efficiency heat dissipation system for hydraulic retarder according to claim 1, characterized in that: The cooling pump (12) is installed on the third main pipe (14).

3. The high-efficiency heat dissipation system for hydraulic retarder according to claim 2, characterized in that: The third main pipe (14) is also connected to the second main pipe (7) via a third branch pipe (10), and a third bypass valve (9) is also installed on the third branch pipe (10).

4. The high-efficiency heat dissipation system for hydraulic retarder according to claim 3, characterized in that: The connection point between the third branch pipe (10) and the third main pipe (14) is located between the cooling pump (12) and the engine (11).

5. The high-efficiency heat dissipation system for hydraulic retarder according to claim 3, characterized in that: The second main pipe (7) is also connected to the first main pipe (2) via a second branch pipe (5), and a second bypass valve (6) is installed on the second branch pipe (5).

6. The high-efficiency heat dissipation system for hydraulic retarder according to claim 5, characterized in that: The connection point between the second branch pipe (5) and the second main pipe (7) is located between the engine (11) and the third branch pipe (10), and the connection point between the second branch pipe (5) and the first main pipe (2) is located between the three-way regulating valve (15) and the hydraulic retarder (8).

7. The high-efficiency heat dissipation system for hydraulic retarder according to claim 6, characterized in that: The first bypass valve (3), the second bypass valve (6) and the third bypass valve (9) are three-valve integrated structures.

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