Cooling system and engineering machinery

Abstract

The utility model belongs to the technical field of engineering machinery, and discloses a cooling system and engineering machinery, the cooling system comprises a circulating pump, a radiator and a spraying piece, a drive axle main transmission axle package is provided with an oil outlet, the oil outlet is communicated with an inlet of the circulating pump, an outlet of the circulating pump is communicated with an inlet of the radiator, and an outlet of the radiator is communicated with an oil conveying pipe. The spraying piece is located in the drive axle main transmission axle packet, the oil conveying pipe penetrates through the drive axle main transmission axle packet and is connected with the spraying piece, the spraying piece is provided with a plurality of spraying holes distributed in a matrix shape, and the spraying holes are communicated with the oil conveying pipe; the engineering machinery comprises the cooling system. According to the cooling system and the engineering machinery provided by the utility model, the cooled lubricating oil can be dispersed and uniformly sprayed into the main transmission axle packet of the drive axle, so that the overall cooling effect of the lubricating oil in the main transmission axle packet of the drive axle is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a cooling system and engineering machinery. Background Art

[0002] The drive axle is a mechanism located at the end of the transmission system of an engineering machinery that can change the speed and torque from the transmission and transmit them to the drive wheels. The drive axle includes a main transmission axle package, in which a transmission gear set is arranged, and lubricating oil for lubricating the transmission gear set is provided. When the drive axle is working, the transmission gear set rotates at high speed, stirring the lubricating oil to splash, thereby playing a role in lubricating and cooling the transmission gear set.

[0003] In actual work, during the long-term high-load operation of the drive axle, the temperature of the lubricating oil becomes higher and higher. On the one hand, the viscosity of the oil becomes thinner and thinner, making the oil film adhering to the transmission gear set more likely to break, accelerating the wear between the gears. On the other hand, the amount of lubricating oil added to the main transmission bridge package of the drive axle generally exceeds the center line of the gear, which will result in excessive oil and greater stirring resistance, thereby losing some energy and reducing the transmission efficiency of the transmission gear set.

[0004] In view of the above problems, a cooling system for the lubricating oil in the main transmission axle pack of the drive axle has been designed in the prior art, such as the patent document with publication number CN109268476A, which discloses a heat dissipation control system for the drive axle of engineering machinery. The system circulates and cools the lubricating oil when the temperature of the lubricating oil in the main transmission axle pack of the drive axle is too high by setting components such as an oil suction pump, a radiator, and a temperature sensor, thereby ensuring the viscosity of the oil and reducing the amount of lubricating oil set. However, the above system also has certain shortcomings. In the above system, the lubricating oil reflux is achieved by setting an oil inlet, but with such a setting, there is still the problem of uneven entry of the low-temperature lubricating oil after cooling, and the mixing effect between the high and low temperature lubricating oils is poor, which affects the cooling effect of the lubricating oil in the main transmission axle pack of the drive axle. Utility Model Content

[0005] The purpose of the utility model is to provide a cooling system with a simple structure. The cooled lubricating oil can be dispersed and evenly sprayed into the main transmission bridge pack of the drive axle, thereby further improving the overall cooling effect of the lubricating oil in the main transmission bridge pack of the drive axle.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A cooling system is used to cool the lubricating oil in the main transmission bridge pack of a drive axle, and the cooling system includes a circulation pump, a radiator and a spraying element; wherein:

[0008] The drive axle main transmission bridge package has an oil outlet, the oil outlet is connected to the inlet of the circulating pump, the outlet of the circulating pump is connected to the inlet of the radiator, the outlet of the radiator is connected to the oil pipe, the spray component is located in the drive axle main transmission bridge package, the oil pipe passes through the drive axle main transmission bridge package and is connected to the spray component, the spray component is provided with a plurality of spray holes distributed in a matrix shape, and the plurality of spray holes are connected to the oil pipe.

[0009] Preferably, the top of the main transmission bridge package of the drive axle has an oil inlet, the oil pipe passes through the oil inlet and is connected to the spray component, and a sealing sleeve is provided on the oil pipe to seal the gap between the oil pipe and the oil inlet.

[0010] Preferably, the oil pipeline includes a main body and a connecting sleeve, the spray part includes a spray head and a connecting head, the connecting head is provided with a connecting hole, the spray head has a spray chamber inside, the spray chamber is connected to the spray hole and the connecting hole, the connecting head is fixedly inserted in the connecting sleeve, and the spray chamber is connected to the main body through the connecting hole.

[0011] Preferably, the outer peripheral wall of the connecting head is provided with an external thread, and the inner peripheral wall of the connecting sleeve is correspondingly provided with an internal thread matching and connected with the external thread.

[0012] Preferably, it also includes a temperature sensor, a controller and an actuator, wherein the temperature sensor is used to detect the temperature of the lubricating oil, the temperature sensor and the actuator are electrically connected to the controller respectively, and the controller can control the actuator to drive the circulating pump to work according to the detected temperature of the temperature sensor.

[0013] Preferably, the actuator includes a power supply circuit and an opening and closing drive component, the power supply circuit is electrically connected to the circulation pump, the opening and closing drive component is arranged on the power supply circuit and is electrically connected to the controller, and the controller can control the opening and closing drive component to open and close the power supply circuit.

[0014] Preferably, the opening and closing drive component includes a relay, the relay includes a coil end and a contact end, the coil end is electrically connected to the controller, the contact end is arranged on the power circuit, and the contact end can open and close the power circuit when it moves.

[0015] Preferably, a filter is provided between the oil outlet and the inlet of the circulation pump.

[0016] Preferably, the filter element comprises a magnetic filter.

[0017] The utility model also provides an engineering machinery, which applies the above-mentioned cooling system. The cooled lubricating oil can be dispersed and evenly sprayed into the main transmission bridge package of the drive axle, further improving the overall cooling effect of the lubricating oil in the main transmission bridge package of the drive axle.

[0018] An engineering machine, comprising:

[0019] A chassis, on which the main transmission bridge package of the drive axle is arranged;

[0020] In the cooling system as described in any of the above items, the circulation pump and the radiator are both arranged on the chassis.

[0021] Beneficial effects:

[0022] The cooling system provided by the utility model, when the high-temperature lubricating oil in the main transmission axle pack of the drive axle needs to be dissipated and cooled, the circulation pump works, so that the high-temperature lubricating oil in the main transmission axle pack of the drive axle flows through the circulation pump through the oil outlet and enters the radiator for heat dissipation, and the low-temperature lubricating oil after heat dissipation and cooling returns to the main transmission axle pack of the drive axle through the oil pipe and the spray part. Specifically, the spray part is provided with a plurality of spray holes distributed in a matrix shape, and the plurality of spray holes are connected to the oil pipe. The low-temperature lubricating oil transported by the oil pipe flows into the spray part and is divided by the plurality of spray holes and then dispersed and evenly sprayed into the main transmission axle pack of the drive axle, thereby further improving the overall cooling effect of the lubricating oil in the main transmission axle pack of the drive axle and improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a simplified structural diagram of the cooling system provided by the utility model;

[0024] Figure 2 It is a side sectional view of the main transmission bridge package of the drive axle provided by the utility model, which is equipped with a spraying member;

[0025] Figure 3 It is an exploded schematic diagram of the spraying part and the oil pipeline provided by the utility model.

[0026] In the figure:

[0027] 1. Circulation pump;

[0028] 2. Radiator; 21. Oil pipe; 211. Main pipe body; 212. Connecting sleeve; 22. Sealing sleeve;

[0029] 3. Spraying parts; 31. Spraying head; 311. Spraying hole; 312. Spraying chamber; 32. Connecting head; 321. Connecting hole;

[0030] 4. Temperature sensor;

[0031] 5. Controller;

[0032] 61, power circuit; 62, relay; 621, coil end; 622, contact end;

[0033] 7. Filter element;

[0034] 8. Drive axle main transmission bridge package; 81. Oil inlet; 82. Oil outlet. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] This embodiment provides a cooling system. Figures 1 to 3As shown, the cooling system is used to cool the lubricating oil in the main transmission bridge package 8 of the drive axle. The cooling system includes a circulation pump 1, a radiator 2 and a spraying member 3; wherein the main transmission bridge package 8 of the drive axle has an oil outlet 82, the oil outlet 82 is connected to the inlet of the circulation pump 1, the outlet of the circulation pump 1 is connected to the inlet of the radiator 2, the outlet of the radiator 2 is connected to the oil delivery pipe 21, the spraying member 3 is located in the main transmission bridge package 8 of the drive axle, the oil delivery pipe 21 passes through the main transmission bridge package 8 of the drive axle and is connected to the spraying member 3, the spraying member 3 is provided with a plurality of spray holes 311 distributed in a matrix shape, and the plurality of spray holes 311 are connected to the oil delivery pipe 21.

[0040] In this embodiment, when the high-temperature lubricating oil in the main transmission bridge package 8 of the drive axle needs to be dissipated and cooled, the circulating pump 1 works, so that the high-temperature lubricating oil in the main transmission bridge package 8 of the drive axle flows through the circulating pump 1 through the oil outlet 82 and enters the radiator 2 for heat dissipation, and the low-temperature lubricating oil after heat dissipation and cooling returns to the main transmission bridge package 8 of the drive axle through the oil pipe 21 and the spray part 3. The above process can reliably cool the lubricating oil in the main transmission bridge package 8 of the drive axle, maintain the viscosity of the lubricating oil, so that it can adhere to the transmission gear set to form a durable oil film, and effectively alleviate the wear of the transmission gear set. In addition, since the lubricating oil can be cooled in time, there is no excessive lubricating oil in the main transmission bridge package 8 of the drive axle, which also effectively improves the transmission efficiency of the transmission gear set. In addition, the spray component 3 is provided with a plurality of spray holes 311 distributed in a matrix shape, and the plurality of spray holes 311 are connected to the oil pipeline 21. The low-temperature lubricating oil transported by the oil pipeline 21 flows into the spray component 3 and is then diverted through the plurality of spray holes 311 and then dispersed and evenly sprayed into the main transmission bridge package 8 of the drive axle, thereby further improving the overall cooling effect of the lubricating oil in the main transmission bridge package 8 of the drive axle and improving the cooling efficiency.

[0041] Furthermore, the drive axle main transmission bridge package 8 has an oil inlet 81, and the oil delivery pipe 21 passes through the oil inlet 81 and is connected to the spraying member 3. The oil inlet 81 is located at the top of the drive axle main transmission bridge package 8. A sealing sleeve 22 is provided on the oil delivery pipe 21, and the sealing sleeve 22 is used to block the gap between the oil delivery pipe 21 and the oil inlet 81. By providing the sealing sleeve 22, the gap between the oil delivery pipe 21 and the oil inlet 81 can be effectively blocked to prevent lubricating oil from leaking out of the gap.

[0042] Optionally, the sealing sleeve 22 is made of rubber.

[0043] More specifically, the oil delivery pipe 21 includes a main body 211 and a connecting sleeve 212, the spray part 3 includes a spray head 31 and a connecting head 32, the connecting head 32 is provided with a connecting hole 321, the spray head 31 has a spray chamber 312, the spray chamber 312 is connected to the spray hole 311 and the connecting hole 321, the connecting head 32 is fixedly inserted in the connecting sleeve 212, and the spray chamber 312 is connected to the main body 211 through the connecting hole 321. Specifically, one end of the main body 211 is connected to the radiator 2, and the other end is connected to the connecting sleeve 212. The lubricating oil cooled by the radiator 2 flows through the main body 211, and is sprayed out through the connecting hole 321, the spray chamber 312 and the plurality of spray holes 311 in sequence.

[0044] In addition, the form of the connector 32 and the fixed connection also facilitates the replacement of the connector 32, so as to adapt to the main transmission bridge package 8 of the drive axle of different sizes and specifications.

[0045] Further optionally, the outer peripheral wall of the connector 32 is provided with an external thread, and the inner peripheral wall of the connector sleeve 212 is provided with an internal thread that matches the external thread. The connector 32 and the connector sleeve 212 are connected by a threaded connection, and the connector 32 is screwed into the connector sleeve 212 to achieve a fixed connection between the two. In addition, the threaded connection can also effectively achieve the sealing between the connector 32 and the connector sleeve 212.

[0046] In this embodiment, continue to refer to Figure 1 As shown, the transmission system also includes a temperature sensor 4, a controller 5 and an actuator. Among them, the temperature sensor 4 is used to detect the temperature of the lubricating oil. The temperature sensor 4 and the actuator are electrically connected to the controller 5 respectively. The controller 5 is suitable for controlling the actuator to drive the circulation pump 1 to work when the temperature sensor 4 detects that the temperature of the lubricating oil reaches the threshold temperature. Through the cooperation of the temperature sensor 4, the controller 5 and the actuator, the automatic control of the circulation cooling of the lubricating oil can be realized. Specifically, when the temperature sensor 4 detects that the temperature of the lubricating oil rises by T1, the controller 5 controls the actuator to drive the circulation pump 1 to work, thereby making the entire cooling system work; when the temperature sensor 4 detects that the temperature of the lubricating oil drops to T2, the controller 5 controls the actuator to drive the circulation pump 1 to stop working, thereby making the entire cooling system stop working, adaptively controlling the start and stop of the cooling system, thereby playing a role in saving energy.

[0047] Optionally, the controller 5 may be a single chip microcomputer controller 5 .

[0048] Specifically, the actuator includes a power circuit 61 and an opening and closing drive, the power circuit 61 is electrically connected to the circulation pump 1, a switch is provided on the power circuit 61, the opening and closing drive is electrically connected to the controller 5, and the controller 5 can control the opening and closing of the opening and closing drive. Specifically, the controller 5 is suitable for controlling the movement of the opening and closing drive when the temperature sensor 4 detects that the temperature of the lubricating oil reaches the threshold temperature, so that the opening and closing drive closes the switch, and then closes the power circuit 61 to power the circulation pump 1, so that the circulation pump 1 works.

[0049] Optionally, the power circuit 61 uses a 24V DC power supply.

[0050] As an optional embodiment, the opening and closing drive member includes a relay 62, and the relay 62 includes a coil end 621 and a contact end 622. The coil end 621 is electrically connected to the controller 5, and the contact end 622 is arranged on the power circuit 61. The contact end 622 (movement) can open and close the power circuit 61. Specifically, the contact end 622 of the relay 62 is equivalent to the switch of the power circuit 61. The controller 5 can control the coil end 621 of the relay 62 to be energized, thereby driving the contact end to move and close to turn on the power circuit 61, thereby making the circulating pump 1 work.

[0051] In some other optional embodiments, the opening and closing drive member includes a telescopic cylinder and a switch, the cylinder body of the telescopic cylinder is fixed relative to the main transmission bridge package 8 of the drive axle, the cylinder rod of the telescopic cylinder is connected to the switch, and the switch is arranged on the power supply circuit 61. Specifically, the cylinder rod of the telescopic cylinder is provided with a sliding hinge joint, which can slide on the switch and can rotate relative to the switch. When the cylinder rod of the telescopic cylinder is extended, the sliding hinge joint can slide and rotate relative to the switch, thereby driving the switch to close.

[0052] In this embodiment, a filter 7 is further provided between the oil outlet 82 and the inlet of the circulating pump 1. The provision of the filter 7 can timely and effectively remove impurities in the lubricating oil to ensure the purity of the lubricating oil.

[0053] Specifically, the filter element 7 includes a magnetic filter. In addition to removing impurities in the lubricating oil, the magnetic filter can also demagnetize the lubricating oil in the bridge pack.

[0054] This embodiment provides an engineering machine. The engineering machine includes a chassis and the above-mentioned cooling system. A drive axle main transmission bridge package 8 is arranged on the chassis, and a circulation pump 1, a radiator 2, and a filter 7 are all arranged on the chassis.

[0055] The above cooling system is used on engineering machinery, so that all the beneficial effects of the above cooling system can be obtained, which will not be described in detail here.

[0056] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A cooling system for cooling lubricating oil in a main transmission bridge pack (8) of a drive axle, characterized in that: The cooling system comprises a circulation pump (1), a radiator (2) and a spray element (3); wherein: The drive axle main transmission bridge package (8) has an oil outlet (82), the oil outlet (82) is connected to the inlet of the circulation pump (1), the outlet of the circulation pump (1) is connected to the inlet of the radiator (2), the outlet of the radiator (2) is connected to the oil delivery pipe (21), the spray component (3) is located in the drive axle main transmission bridge package (8), the oil delivery pipe (21) passes through the drive axle main transmission bridge package (8) and is connected to the spray component (3), the spray component (3) is provided with a plurality of spray holes (311) distributed in a matrix shape, and the plurality of spray holes (311) are connected to the oil delivery pipe (21).

2. The cooling system according to claim 1, characterized in that: The top of the main transmission bridge package (8) of the drive axle is provided with an oil inlet (81), the oil delivery pipe (21) passes through the oil inlet (81) and is connected to the spraying member (3), and a sealing sleeve (22) is sleeved on the oil delivery pipe (21), and the sealing sleeve (22) is used to seal the gap between the oil delivery pipe (21) and the oil inlet (81).

3. The cooling system according to claim 1, characterized in that: The oil delivery pipe (21) comprises a main body (211) and a connecting sleeve (212); the spraying member (3) comprises a spray head (31) and a connecting head (32); the connecting head (32) is provided with a connecting hole (321); a spray chamber (312) is provided in the spray head (31); the spray chamber (312) is connected to the spray hole (311) and the connecting hole (321); the connecting head (32) is fixedly inserted in the connecting sleeve (212); and the spray chamber (312) is connected to the main body (211) through the connecting hole (321).

4. The cooling system according to claim 3, characterized in that: The outer peripheral wall of the connecting head (32) is provided with an external thread, and the inner peripheral wall of the connecting sleeve (212) is correspondingly provided with an internal thread that matches and connects with the external thread.

5. The cooling system according to claim 1, characterized in that: It also includes a temperature sensor (4), a controller (5) and an actuator, wherein the temperature sensor (4) is used to detect the temperature of the lubricating oil, the temperature sensor (4) and the actuator are electrically connected to the controller (5) respectively, and the controller (5) can control the actuator to drive the circulation pump (1) to work according to the detected temperature of the temperature sensor (4).

6. The cooling system according to claim 5, characterized in that The actuator comprises a power circuit (61) and an opening and closing drive component, wherein the power circuit (61) is electrically connected to the circulation pump (1), and the opening and closing drive component is arranged on the power circuit (61) and is electrically connected to the controller (5), and the controller (5) is capable of controlling the opening and closing drive component to open and close the power circuit (61).

7. The cooling system according to claim 6, characterized in that: The opening and closing drive component comprises a relay (62), the relay (62) comprising a coil end (621) and a contact end (622), the coil end (621) being electrically connected to the controller (5), the contact end (622) being arranged on the power circuit (61), and the contact end (622) being able to open and close the power circuit (61) when it moves.

8. The cooling system according to claim 1, characterized in that: A filter element (7) is also provided between the oil outlet (82) and the inlet of the circulation pump (1).

9. The cooling system according to claim 8, characterized in that: The filter element (7) comprises a magnetic filter.

10. An engineering machine, characterized in that: include: A chassis, on which the drive axle main transmission bridge package (8) is arranged; According to the cooling system according to any one of claims 1 to 9, the circulating pump (1) and the radiator (2) are both arranged on the chassis.

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