External cooling device and cooling system

Abstract

The invention relates to the technical field of automobile manufacturing, in particular to an external cooling device and a cooling system. The external cooling device comprises a main shell and a plurality of heat collecting columns; a cavity for cooling water to pass through is formed in the main shell; a liquid inlet and a liquid outlet which are communicated with the cavity are respectively formed in two sides of the main shell; the plurality of heat collection columns penetrate through the main shell and pass through the cavity; the heat exchange ends, exposed out of the main shell, of the heat collection columns can make contact with an external sample so as to conduct heat exchange. According to the external cooling device and the cooling system, the problems that in an automobile transmission product test, if an air cooling mode is adopted for cooling lubricating oil, the cooling effect is poor; and if an oil path is communicated with an external circulating cooling device, the constant amount of lubricating oil in the sample cannot be stably ensured.

Description

Technical Field

[0001] The present application relates to the field of automobile manufacturing technology, and in particular to an external cooling device and a cooling system. Background Art

[0002] During the testing of automotive transmission products, higher gear speeds and greater torques will cause the lubricating oil of the test samples to heat up faster and to a higher temperature. In order to stably control the oil temperature, a cooling device is essential.

[0003] In current tests, for samples with radiators, external cooling water can be used to control the oil temperature; for samples without radiators (such as drive axles or transmissions), air cooling is usually used alone, or the oil circuit of the sample is connected to an external circulating cooling device to control the oil temperature. However, since the convection heat transfer coefficient of air is much smaller than that of water, air cooling cannot achieve effective cooling under harsh working conditions; and the external circulating cooling method of the oil circuit cannot stably ensure a constant amount of lubricating oil in the sample. Summary of the invention

[0004] The purpose of the present application is to provide an external cooling device and a cooling system, thereby solving the problem of cooling the lubricating oil in the test of automobile transmission products. If air cooling is used, the cooling effect is not good; if the oil circuit is connected to the external circulation cooling device, it is impossible to stably ensure the constant amount of lubricating oil in the sample.

[0005] According to the first aspect of the present application, an external cooling device is provided, which includes a main shell and a plurality of heat collecting columns; a cavity for cooling water to pass through is formed inside the main shell; a liquid inlet and a liquid outlet connected to the cavity are respectively provided on both sides of the main shell; the plurality of heat collecting columns all pass through the main shell and the cavity; the heat exchange ends of the plurality of heat collecting columns exposed to the outside of the main shell can contact with external samples for heat exchange.

[0006] In any of the above technical solutions, further, the external cooling device also includes a cover plate and multiple partitions; one side of the main shell is open, and the cover plate seals one side of the main shell; the multiple partitions are spaced apart in the cavity along the first direction to form a bottom layer, a middle layer and an upper layer; each of the heat collecting columns extends along the first direction, and the heat collecting columns pass through the cover plate, the multiple partitions and the main shell in sequence; the cooling liquid can enter the cavity from the liquid inlet, pass through the bottom layer, the middle layer and the upper layer in sequence, and flow out of the cavity from the liquid outlet.

[0007] In any of the above technical schemes, further, the external cooling device also includes a first baffle and a second baffle; the first baffle and the second baffle are both arranged in the cavity, and the first baffle and the second baffle are respectively located on the two sides of the main shell that are opposite to each other in the second direction; the first baffle and the main shell form a first collecting chamber, and the second baffle and the main shell form a second collecting chamber, and the two sides of the main shell that are opposite to each other in the second direction are respectively provided with a liquid inlet and a liquid outlet connected to the first collecting chamber and the second collecting chamber; the multiple partitions are arranged between the two baffles along the first direction at intervals to form the bottom layer, the middle layer and the upper layer; the first baffle is provided with a first notch at the bottom, and the second baffle is provided with a second notch at the top; the coolant can enter the first collecting chamber from the liquid inlet, and pass through the first notch, the bottom layer, the middle layer, the upper layer, the second notch and the second collecting chamber in sequence, and flow out from the liquid outlet.

[0008] In any of the above technical solutions, further, the external cooling device also includes a first cover, a second cover, a first sealing gasket and a second sealing gasket; the first sealing gasket is pressed between the first cover and the cover plate; the second sealing gasket is pressed between the second cover and the main shell; the heat collecting column passes through the first cover, the first sealing gasket, the cover plate, the multiple partitions, the main shell, the second sealing gasket and the second cover in sequence.

[0009] In any of the above technical solutions, further, the external cooling device also includes a clamping frame and a knob; the clamping frame includes a clamping plate and a driving plate connected to each other; the clamping plate includes a plurality of through holes for installing the plurality of heat collecting columns, the knob is threadedly connected to the driving plate, and the end of the knob abuts against the main shell; the knob can be rotated to drive the clamping frame to move along the second direction, so that the plurality of through holes of the clamping plate clamp the heat collecting column to limit the movement of the heat collecting column along the first direction; the first direction is perpendicular to the second direction.

[0010] In any of the above technical solutions, further, the external cooling device also includes a first outer shell, a second outer shell and a driving mechanism; the first outer shell is connected to the second outer shell to jointly wrap the main shell; the main shell is slidably connected to the first outer shell and the second outer shell; the driving mechanism is arranged in the first outer shell or the second outer shell to drive the main shell to slide along the first direction.

[0011] In any of the above technical solutions, further, the external cooling device also includes a positioning bracket; a fixed disk is arranged on the outer side of the first outer shell body or the second outer shell body, and a plurality of notched portions with the same structure are arranged along the circumference of the fixed disk; the positioning bracket includes a universal disk adapted to the fixed disk, and a plurality of raised portions with the same structure are arranged along the circumference of the universal disk, and any of the notched portions is adapted to any of the raised portions.

[0012] In any of the above technical solutions, further, the heat collecting column of the external cooling device is used to contact the storage oil tank of the vehicle's drive axle or transmission.

[0013] According to a second aspect of the present application, a cooling system is provided, comprising the external cooling device as described above.

[0014] In any of the above technical solutions, further, the cooling system also includes a liquid inlet tank, a liquid return tank, a pump body, a first three-way throttle valve, an oil temperature collection unit and a control unit; the liquid inlet tank is connected to the liquid inlet of the first three-way throttle valve via the pump body, the first liquid outlet of the first three-way throttle valve is connected to the liquid inlet of the external cooling device, and the second liquid outlet of the first three-way throttle valve and the liquid outlet of the external cooling device are both connected to the liquid return tank; the control unit is pre-set with a first target value; before the oil temperature of the first sample collected by the oil temperature collection unit reaches the first target value, the first liquid outlet of the first three-way throttle valve is closed and the second liquid outlet is opened; when the oil temperature of the first sample collected by the oil temperature collection unit reaches the first target value, the control unit controls the first liquid outlet of the first three-way throttle valve to open and the second liquid outlet to close; subsequently, the control unit controls the opening of the second liquid outlet and the first liquid outlet of the first three-way throttle valve so that the oil temperature of the first sample is maintained within the floating range of the first target value.

[0015] In any of the above technical solutions, further, the cooling system also includes a second three-way throttle valve, a first external cooling device and a second external cooling device; the first liquid outlet of the first three-way throttle valve is connected to the liquid inlet of the second three-way throttle valve, the first liquid outlet of the second three-way throttle valve is connected to the liquid inlet of the first external cooling device, the second liquid outlet of the second three-way throttle valve is connected to the liquid inlet of the second external cooling device, and the liquid outlet of the first external cooling device and the liquid outlet of the second external cooling device are both connected to the liquid return tank; the control unit is pre-set with a second target value; before the oil temperature of the first sample collected by the oil temperature collection unit reaches the first target value, the first liquid outlet of the first three-way throttle valve is closed and the second liquid outlet is opened; when the oil temperature of the first sample collected by the oil temperature collection unit reaches the first target value, However, before the oil temperature of the second sample reaches the second target value, the control unit controls the first liquid outlet of the first three-way throttle valve to open and the second liquid outlet to close; then, the control unit controls the opening of the second liquid outlet and the first liquid outlet of the first three-way throttle valve to keep the oil temperature of the first sample within the floating range of the first target value; when the oil temperature of the second sample collected by the oil temperature collection unit reaches the second target value, the first liquid outlet of the first three-way throttle valve is closed and the second liquid outlet is opened; and the control unit controls both the first liquid outlet and the second liquid outlet of the second three-way throttle valve to open; then, the control unit controls the opening of the second liquid outlet and the first liquid outlet of the second three-way throttle valve to keep the oil temperature of the first sample within the floating range of the first target value, and keep the oil temperature of the second sample within the floating range of the second target value.

[0016] The external cooling device of the present application includes a main shell and a plurality of heat collecting columns. A cavity is formed inside the main shell for cooling water to pass through; a liquid inlet and a liquid outlet connected to the cavity are respectively arranged on both sides of the main shell; the plurality of heat collecting columns all pass through the main shell and the cavity; the heat exchange ends of the plurality of heat collecting columns exposed outside the main shell can contact with external samples to exchange heat.

[0017] According to the above technical features, the beneficial effects of this application are:

[0018] During the transmission sample test, in order to stably control the oil temperature, the heat exchange ends of the multiple heat collecting columns of the external cooling device of the present application can be brought into contact with the sample to exchange heat. In this way, the cooling liquid flowing through the main shell cavity exchanges heat with the multiple heat collecting columns, thereby cooling the lubricating oil of the sample. Compared with the prior art, the external cooling device of the present application not only has a good cooling effect, but also can ensure a constant amount of lubricating oil in the sample.

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram showing the overall cross-sectional structure of an external cooling device according to an embodiment of the present application;

[0022] Figure 2 A schematic diagram showing the overall structure of the main housing of an embodiment of the present application;

[0023] Figure 3 A schematic diagram showing the assembly structure of a clamping frame according to an embodiment of the present application;

[0024] Figure 4 A schematic diagram showing the overall structure of a first outer shell and a second outer shell of an embodiment of the present application;

[0025] Figure 5 A schematic diagram showing the overall structure of an external cooling device according to an embodiment of the present application;

[0026] Figure 6 A schematic diagram showing the overall structure of an external cooling device of an embodiment of the present application after a positioning bracket is installed;

[0027] Figure 7 A schematic diagram showing the overall structure of two external cooling devices after being spliced ​​together according to an embodiment of the present application;

[0028] Figure 8 A schematic diagram showing the water circuit connection of a cooling system according to an embodiment of the present application;

[0029] Fig. 9 A schematic diagram showing the water circuit and circuit connection of a cooling system according to an embodiment of the present application;

[0030] Fig.10 A flowchart showing a cooling system according to an embodiment of the present application performing single temperature constant temperature control;

[0031] Fig.11 A flow chart showing the cooling system of an embodiment of the present application performing dual-temperature constant temperature control.

[0032] Icons: 100-main shell; 200-heat collecting column; 201-heat exchange part; 300-cover plate; 400-partition plate; 110-first baffle plate; 111-first collecting chamber; 112-first notch; 120-second baffle plate; 121-second collecting chamber; 122-second notch; 130-slideway; 140-liquid inlet pipe; 150-liquid outlet pipe; 510-first cover; 520-second cover; 610-first sealing gasket; 620-second sealing gasket; 700-clamping frame; 710-knob; 720-driving plate; 730-clamping plate; 810-first outer shell; 811-slideway; 812-plug slot; 8 13-fixed frame; 814-fixed disc; 8141-deficient part; 820-second outer shell; 821-plug-in channel; 900-solenoid valve body; 910-guide column; 920-fixed plate; 1000-positioning bracket; 1100-positioning plate; 1110-universal disc; 10-external cooling device; 101-first external cooling device; 102-second external cooling device; 20-first three-way throttle valve; 30-second three-way throttle valve; 40-pressure relief valve; 50-impeller pump; 60-liquid inlet tank; 70-liquid return tank; 80-oil temperature collection unit; 90-control unit; L1-first direction; L2-second direction. DETAILED DESCRIPTION

[0033] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0034] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0035] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0036] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0037] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0038] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0039] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0040] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0041] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0042] The first aspect of the present application provides an external cooling device, thereby solving the problem of cooling the lubricating oil in the test of automobile transmission products. If air cooling is used, the cooling effect is not good; if the oil circuit is connected to the external circulation cooling device, it is impossible to stably ensure the constant amount of lubricating oil in the sample.

[0043] Refer to the following Figures 1 to 7 The external cooling device according to some embodiments of the present application is described. In addition, for the convenience of description, the first direction L1 and the second direction L2 are introduced, and the first direction L1 and the second direction L2 are perpendicular to each other as an example for description.

[0044] like Figure 1 and Figure 2 As shown, the external cooling device of the present application includes a main housing 100 and a plurality of heat collecting columns 200. A cavity for cooling water to pass through is formed inside the main housing 100; a liquid inlet and a liquid outlet connected to the cavity are respectively arranged on both sides of the main housing 100; the plurality of heat collecting columns 200 all pass through the main housing 100 and the cavity; the heat exchange ends of the plurality of heat collecting columns 200 exposed outside the main housing 100 can contact with external samples for heat exchange.

[0045] During the transmission sample test, in order to stably control the oil temperature, the heat exchange ends of the multiple heat collecting columns 200 of the external cooling device of the present application can be brought into contact with the sample to exchange heat. In this way, the cooling liquid flowing through the cavity of the main housing 100 exchanges heat with the multiple heat collecting columns 200, thereby cooling the lubricating oil of the sample. Compared with the prior art, the external cooling device of the present application not only has a good cooling effect, but also can ensure a constant amount of lubricating oil in the sample.

[0046] In the embodiments of the present application, Figure 1 As shown, the external cooling device also includes a cover plate 300 and a plurality of partitions 400 that are laid transversely and staggered to achieve sufficient heat exchange between the coolant inside the main shell 100 and the heat collecting column 200; in addition, the cover plate 300 seals the top of the main shell 100 to prevent the coolant from overflowing from all sides of the main shell 100.

[0047] Specifically, Figure 1 As shown, the top side of the main housing 100 is open, and the cover plate 300 seals the top side of the main housing 100; Figure 1 and Figure 3 As shown, a plurality of partitions 400 are arranged in the cavity at intervals along the first direction L1 to form a bottom layer, two middle layers and an upper layer; each heat collecting column 200 extends along the first direction L1, and the heat collecting column 200 passes through the cover plate 300, a plurality of partitions 400 and the main shell 100 in sequence; the coolant can enter the cavity from the liquid inlet, pass through the bottom layer, the middle layer and the upper layer in sequence, and flow out of the cavity from the liquid outlet.

[0048] Further, in the embodiments of the present application, Figure 2 As shown, the external cooling device further includes a first baffle 110 and a second baffle 120. The first baffle 110 and the second baffle 120 are both disposed in the cavity, and the first baffle 110 and the second baffle 120 are respectively located on two sides of the main housing 100 that are opposite to each other in the second direction L2; the first baffle 110 and the main housing 100 form a first collecting chamber 111, and the second baffle 120 and the main housing 100 form a second collecting chamber 121, and the two sides of the main housing 100 that are opposite to each other in the second direction L2 are respectively provided with a liquid inlet and a liquid outlet ( Figure 2 Schematically shows a liquid inlet pipe 140 connected to the first collecting chamber 111 and a liquid outlet pipe 150 connected to the second collecting chamber 121).

[0049] A plurality of partitions 400 are spaced apart between two baffles along the first direction L1 to form a bottom layer, two middle layers and an upper layer; Figure 2 As shown, the first baffle 110 is provided with a first notch 112 at the bottom, and the second baffle 120 is provided with a second notch 122 at the top, so that the coolant can enter the first collecting chamber 111 from the liquid inlet, and sequentially pass through the first notch 112, the bottom layer, the middle layer, the upper layer, the second notch 122, and the second collecting chamber 121, and then flow out from the liquid outlet. In other words, the coolant can sequentially flow from the bottom layer along the gap between the heat collecting column 200 and the partition 400 to the top layer, and the entire heat exchange process is progressive along the surface of the heat collecting column 200, and the heat exchange effect is better.

[0050] In addition, in the embodiments of the present application, Figure 1 and Figure 3 As shown, the external cooling device further includes a first cover 510, a second cover 520, a first sealing gasket 610 and a second sealing gasket 620. The first sealing gasket 610 is pressed between the first cover 510 and the cover plate 300; the second sealing gasket 620 is pressed between the second cover 520 and the main housing 100; the heat collecting column 200 passes through the first cover 510, the first sealing gasket 610, the cover plate 300, the plurality of partitions 400, the main housing 100, the second sealing gasket 620 and the second cover 520 in sequence.

[0051] During assembly, two sealing gaskets are respectively arranged between the first cover 510 and the cover plate 300, and between the second cover 520 and the main shell 100, and the first cover 510 and the second cover 520 connected by bolts are tightly pressed on the bottom of the main shell 100 and the top of the cover plate 300 to prevent the coolant from overflowing from the outer surface of each heat collecting copper column.

[0052] Continue to see Figure 1 and Figure 3 , the heat collecting column 200 passes through the first cover 510, the first sealing gasket 610, the cover plate 300, the multiple partitions 400, the main shell 100, the second sealing gasket 620 and the second cover 520 in sequence. The through holes provided in the first cover 510, the first sealing gasket 610, the cover plate 300, the multiple partitions 400, the main shell 100, the second sealing gasket 620 and the second cover 520 are all slightly larger than the heat collecting column 200. In this way, each heat collecting column 200 can move up and down relative to the main shell 100, and can still achieve full contact and fully collect heat even when facing a curved surface or a structure with a large degree of undulation.

[0053] Afterwards, when the adjustment of each heat collecting column 200 is completed and they are in full contact with the sample structure, the position of each heat collecting column 200 can be fixed by a fixing structure.

[0054] As an example, in the embodiments of the present application, Figure 1 and 3As shown, the fixing structure includes a clamping frame 700 and a knob 710. The clamping frame 700 includes two clamping plates 730 and a driving plate 720 connected to each other; wherein the two clamping plates 730 are respectively arranged on the top side of the first cover 510 and the bottom side of the second cover 520, and the driving plate 720 is perpendicular to the clamping plates 730 and is located on the side of the main housing 100 where the liquid inlet is installed. Each clamping plate 730 includes a plurality of through holes for installing a plurality of heat collecting columns 200, and the knob 710 is threadedly connected to the driving plate 720, and the end of the knob 710 abuts against the main housing 100. When each heat collecting column 200 needs to be clamped and fixed, the knob 710 is rotated to drive the clamping frame 700 to move along the second direction L2, so that the multiple through holes of the clamping plate 730 clamp the heat collecting column 200 to limit the movement of the heat collecting column 200 along the first direction L1 (the through holes of the clamping plate 730 are not coaxial with the through holes of the main shell 100, and jointly clamp the heat collecting column 200).

[0055] In the embodiments of the present application, Figure 4 and Figure 5 As shown, the external cooling device also includes a first outer shell 810, a second outer shell 820 and a driving mechanism; the first outer shell 810 is bolted to the second outer shell 820 to jointly wrap the main shell 100; the main shell 100 is slidably connected to the first outer shell 810 and the second outer shell 820; the driving mechanism is arranged on the first outer shell 810 or the second outer shell 820 to drive the main shell 100 to slide along the first direction L1.

[0056] As an example, Figure 4 As shown, a plurality of slide grooves 811 are disposed on the inner sides of the first outer shell 810 and the second outer shell 820 . A fixing frame 813 is also disposed on the inner side of the first outer shell 810 . The fixing frame 813 is used to fix the solenoid valve body 900 .

[0057] like Figure 1 and Figure 2 As shown, a plurality of slideways 130 cooperating with the slide grooves 811 are arranged on the outside of the main housing 100, and two fixing plates 920 and two guide pillars 910 fixed between the two fixing plates 920 are also arranged on the outside of the main housing 100, wherein the solenoid valve body 900 can slide on the two guide pillars 910. When the solenoid valve body 900 is powered on, the main housing 100 can slide relative to the first outer housing 810 and the second outer housing 820 along the first direction L1, so that the main housing 100 drives the heat collecting pillar 200 to press or separate from the sample.

[0058] In the embodiments of the present application, Figure 5 and Figure 6 As shown, a fixed disc 814 is disposed on the outer side of the first outer shell 810 and the second outer shell 820. Figure 5As shown, one of the fixed disks 814 is provided with a plurality of notched portions 8141 of the same structure along the circumference of the fixed disk 814 .

[0059] like Figure 6 As shown, the external cooling device also includes a positioning bracket 1000; the positioning bracket 1000 includes two positioning plates 1100, one end of the two positioning plates 1100 is respectively connected with two fixed discs 814, one of the positioning plates 1100 includes a universal disc 1110 adapted to the fixed disc 814, and a plurality of protrusions of the same structure are arranged along the circumference of the universal disc 1110, and any missing portion 8141 is adapted to any protrusion. When in use, the protrusion of the universal disc 1110 can be attached to the missing portion 8141 of the fixed disc 814 of the first outer shell 810 at different angles. At the same time, the other ends of the two positioning plates 1100 are connected by sliding rails to facilitate the positioning of the external cooling device, thereby adjusting the positional relationship with the sample.

[0060] In addition, in the embodiments of the present application, Figure 4 As shown, the outer side of the first outer shell 810 is provided with an inserting groove 812, and the outer side of the second outer shell 820 is provided with an inserting channel 821. Figure 7 As shown, the two external cooling devices 10 of the present application can be plugged in through the plugging channel 821 and the plugging slot 812. On this basis, by adjusting the width of the positioning bracket 1000 to clamp multiple external cooling devices 10, multiple rows of external cooling devices 10 can be cooled together to improve the cooling effect.

[0061] When the external cooling device of the present application is used, firstly, the clamping knob 710 is loosened so that the heat collecting column 200 is not locked by the clamping frame 700, so that the position of the heat collecting column 200 can be adjusted up and down so that it is completely attached to the sample surface. After the position of the heat collecting column 200 is determined, the clamping knob 710 is tightened, and the solenoid valve body is controlled to move the main housing 100 toward the sample, so that the heat collecting column 200 is tightly attached to the sample surface, thereby enabling sufficient heat exchange.

[0062] In this embodiment, Figure 1 As shown, the heat collecting column 200 can adopt a heat collecting copper column. The heat collecting column 200 includes a main body and a heat exchange part 201 arranged at the end of the main body. The cross-sectional area of ​​the heat exchange part 201 is larger than the cross-sectional area of ​​the main body. The heat exchange part 201 can contact with an external sample for heat exchange.

[0063] In summary, in this embodiment, the heat exchange part 201 of the multiple heat collecting columns 200 of the external cooling device can be brought into contact with the storage oil tank of the vehicle's drive axle or transmission to exchange heat. In this way, the cooling liquid flowing through the cavity of the main housing 100 exchanges heat with the multiple heat collecting columns 200, thereby cooling the lubricating oil of the sample. Compared with the prior art, the external cooling device of the present application not only has a good cooling effect, but also can ensure a constant amount of lubricating oil in the sample.

[0064] According to a second aspect of the present application, a cooling system is provided, comprising the external cooling device as described above.

[0065] like Figure 8 and Fig. 9 As shown, the cooling system further includes a liquid inlet tank 60, a liquid return tank 70, a pump body (impeller pump 50), a first three-way throttle valve 20, a second three-way throttle valve 30, an oil temperature collection unit 80 and a control unit 90. The liquid inlet tank 60 is connected to the liquid inlet of the first three-way throttle valve 20 via the pump body (impeller pump 50), the first liquid outlet of the first three-way throttle valve 20 is connected to the liquid inlet of the second three-way throttle valve 30, the first liquid outlet of the second three-way throttle valve 30 is connected to the liquid inlet of the first external cooling device 101, the second liquid outlet of the second three-way throttle valve is connected to the liquid inlet of the second external cooling device 102, and the liquid outlet of the first external cooling device 101 and the liquid outlet of the second external cooling device 102 are both connected to the liquid return tank 70. The control unit 90 is pre-set with a first target value and a second target value.

[0066] For example: When single temperature constant temperature control is required, according to Fig. 9 Connect the water circuits and circuits of each test equipment. When only one passage is connected (i.e., only one external cooling device is connected), before the oil temperature of the first sample collected by the oil temperature collection unit 80 reaches the first target value, the first liquid outlet of the first three-way throttle valve 20 is closed and the second liquid outlet is opened; when the oil temperature of the first sample collected by the oil temperature collection unit 80 reaches the first target value, the control unit 90 controls the first liquid outlet of the first three-way throttle valve 20 to open and the second liquid outlet to close; then, the control unit 90 controls the opening of the second liquid outlet and the first liquid outlet of the first three-way throttle valve 20 so that the oil temperature of the first sample is maintained within the floating range of the first target value.

[0067] Specifically, Fig. 9 and Fig.10As shown: when single temperature constant temperature control is required, the control unit 90 controls the connection passages of the first three-way throttle valve 20 and the second three-way throttle valve 30 to be fully opened, and the passages of the unconnected elements are closed. The first target oil temperature value of the sample can be set on the control unit 90 (for example, the first target value is 80°C), and the oil temperature can be obtained in real time through the oil temperature collection unit 80 and transmitted to the control unit 90 for monitoring. When the collected oil temperature is close to the first target value (less than the first target value, for example, 78°C), the control unit 90 transmits a signal to the impeller pump 50, and the impeller pump 50 starts after receiving the signal. At this time, the passage connecting the first three-way throttle valve 20 to the external cooling device is normally closed, and the passage connecting back to the liquid tank 70 is normally open. At this time, the coolant does not flow through the external cooling device to cool the sample. When the collected oil temperature reaches the first target value, the control unit 90 transmits a signal to the first three-way throttle valve 20, the passage connecting the first three-way throttle valve 20 to the external cooling device is completely opened, the passage connecting the first three-way throttle valve 20 to the liquid tank 70 is completely closed, and the coolant flows through the external cooling device sample to cool down. Subsequently, according to the real-time signal obtained by the oil temperature collection unit 80, the control unit 90 controls the opening of the first three-way throttle valve 20 to connect to the external cooling device and the liquid tank 70 to adjust the cooling capacity of the external cooling device to keep the temperature constant (i.e., adjust the opening of the first liquid outlet and the second liquid outlet of the first three-way throttle valve 20 to keep the sample oil temperature at 80±3°C), and the excess coolant flows out by adjusting the passage connecting the first three-way throttle valve 20 to the liquid tank 70. The impeller pump 50 is turned on in advance to achieve a rapid response of the cooling process.

[0068] For example: When dual temperature constant temperature control is required, according to Fig. 9 Connect the water circuits and circuits of each test equipment. When two passages are connected (i.e., the first external cooling device 101 and the second external cooling device 102 are connected): before the oil temperature of the first sample collected by the oil temperature collection unit 80 reaches the first target value, the first liquid outlet of the first three-way throttle valve 20 is closed and the second liquid outlet is opened; when the oil temperature of the first sample collected by the oil temperature collection unit 80 reaches the first target value, but before the oil temperature of the second sample reaches the second target value, the control unit 90 controls the first liquid outlet of the first three-way throttle valve 20 to open and the second liquid outlet to close; then, the control unit 90 controls the opening of the second liquid outlet and the first liquid outlet of the first three-way throttle valve 20 so that the oil temperature of the first sample is maintained within the floating range of the first target value.

[0069] Subsequently, when the oil temperature of the second sample collected by the oil temperature collection unit 80 reaches the second target value, the first liquid outlet of the first three-way throttle valve 20 is closed and the second liquid outlet is opened; and the control unit 90 controls the first liquid outlet and the second liquid outlet of the second three-way throttle valve 30 to be opened; subsequently, the control unit 90 controls the opening of the second liquid outlet and the first liquid outlet of the second three-way throttle valve 30 so that the oil temperature of the first sample is maintained within the floating range of the first target value, and the oil temperature of the second sample is maintained within the floating range of the second target value.

[0070] Specifically, Fig. 9 and Fig.11 As shown: when dual temperature constant temperature control is required, the control unit 90 controls the connection passage of the second three-way throttle valve 30 to be completely closed. The first target value and the second target value of the sample can be set on the control unit 90 respectively, and the first target value and the second target value correspond to the required temperature of the points on the sample placed by the first external cooling device 101 and the second external cooling device 102. The oil temperature can be obtained in real time through the two oil temperature collection units 80 respectively, and transmitted to the control unit 90 for monitoring. When one of the collected oil temperatures is close to the first target value (less than the first target value, for example, 78°C), the control unit 90 transmits a signal to the impeller pump 50, and the impeller pump 50 is started after receiving the signal. At this time, the passage connecting the first three-way throttle valve 20 to the second three-way throttle valve 30 is normally closed, and the passage connecting the water outlet end return tank 70 is normally open. At this time, the coolant does not flow to the first external cooling device 101 and the second external cooling device 102 to cool the sample. Assuming that the oil temperature collected by one of the oil temperature collection units 80 reaches the target temperature (assuming that the first external cooling device 101 reaches the first target value), the control unit 90 transmits a signal to the first three-way throttle valve 20 and the second three-way throttle valve 30, and the passages of the first three-way throttle valve 20 and the second three-way throttle valve 30 flowing through the first external cooling device 101 are fully opened, and the passage of the first three-way throttle valve 20 flowing through the return liquid tank 70 is fully closed. The coolant flows through the first external cooling device 101 to cool the sample. At the same time, according to the real-time signal obtained by the oil temperature collection unit 80, the control unit 90 controls the opening of the second three-way throttle valve 30 connected to the first external cooling device 101 to adjust the cooling capacity of the first external cooling device 101 (that is, adjust the opening of the first liquid outlet and the second liquid outlet of the first three-way throttle valve 20 to keep the sample oil temperature at 80±3°C), and the excess coolant flows out by adjusting the passage of the first three-way throttle valve 20 connected to the return liquid tank 70.

[0071] When the oil temperature collected from another channel reaches the second target value (the second target value may be 90°C), the passage through the liquid return tank 70 of the first three-way throttle valve 20 is completely closed, and the sum of the passage opening of the second three-way throttle valve 30 through the first external cooling device 101 and the passage opening through the second external cooling device 102 is 1. At this time, the flow rate through the first external cooling device 101 remains unchanged, and all the coolant that originally flowed from the first three-way throttle valve 20 into the liquid return tank 70 flows into the second external cooling device 102. Subsequently, based on the real-time signal obtained by the oil temperature collection unit 80, the control unit 90 controls the opening of the second three-way throttle valve 30 connecting the first external cooling device 101 and the second external cooling device 102 to adjust the cooling capacity of the second external cooling device 102 (that is, the control unit 90 controls the opening of the first liquid outlet and the second liquid outlet of the second three-way throttle valve 30 to adjust the cooling capacity of the second external cooling device 102 so that the oil temperature at the point where the second external cooling device 102 is in close contact is maintained within the range of 90±3°C).

[0072] Subsequently, when one of the external cooling devices does not need to continue cooling, the control unit 90 controls the second three-way throttle valve 30 to close the passage connecting the external cooling device, and controls the first three-way throttle valve 20 to open to the same opening as the opening state before the second three-way throttle valve 30 is closed, so as to ensure that the flow rate of the other coolant remains unchanged.

[0073] It is also worth noting that when dual-temperature constant temperature control is required, when one of the collected oil temperatures reaches the second target value first, the cooling logic when the other collected oil temperature reaches the first target value is the same as above and will not be described in detail here.

[0074] Further, in the embodiments of the present application, Figure 8 and Fig. 9 As shown, the cooling system may also include a pressure relief valve 40. The pressure relief valve 40 is used to monitor whether there is any abnormality in the cooling water circuit. Normally, the passage connecting the impeller pump 50 and the first three-way throttle valve is normally open, and the passage connecting back to the liquid tank 70 is normally closed. When there is an abnormal blockage in the cooling water circuit and the monitoring reading of the pressure relief valve 40 exceeds the threshold, the passage connecting back to the liquid tank 70 is opened for discharge. At the same time, the pressure relief valve 40 feeds back a signal to the control unit 90, and the control unit 90 controls the impeller pump 50 to stop working and displays "abnormal water circuit pressure" to remind the operator to temporarily stop the operation of the test bench and check the water circuit problem.

[0075] In summary, the cooling system of the present application can be installed on any sample to provide cooling according to demand; at the same time, the cooling method of the external cooling device uses a cooling method of a horizontally swept plug-in pipe, which has a strong cooling capacity. The cooling system can also collect the real-time temperature of the sample, and can respond quickly and accurately control the temperature. The cooling system has a simple structure, is easy to install, and has a good cooling effect. At the same time, the system has strong adaptability to various test samples.

[0076] The present application provides an external cooling device with strong adaptability, convenient overlap and installation, and strong cooling capacity. By using multiple copper columns to collect heat, the external cooling device can be installed at different positions of various test samples according to requirements. At the same time, the external cooling device is composed of fewer parts and has a simple structure; the external cooling device can be spliced ​​with each other and fixed and installed by a universal joint bracket, and its overlap and installation methods are very convenient; the external cooling device has been calculated to have a strong cooling capacity.

[0077] The cooling system of the present application achieves fast response and stable temperature control of cooling water with fewer parts. Only by designing a first three-way throttle valve, a fast response of the cooling process can be achieved, and water can be quickly supplied when the temperature reaches the threshold. Through real-time monitoring by the control unit, stable temperature control of one or two points of the sample can be achieved with only two three-way throttle valves.

[0078] Further explanation: the maximum power of a single external cooling device is calculated using relevant knowledge of heat transfer. After selection, the maximum flow rate of the impeller pump is Q = 6.5m 3 / h, the narrowest flow area of ​​the external cooling device shell is S = 0.015 × 0.031 = 4.65 × 10 -4 m 2 , then the flow velocity at the narrowest surface of the external cooling device shell is u = 3.88m / s.

[0079] Assume that the temperature of the cooling water flowing into the external cooling device is T f =20℃, at this time, the physical parameters of water λ=0.585, Re=u*d / ν=3.88×0.005 / (1.004×10 -6 ), where d represents the characteristic length of the flow path and ν represents the kinematic viscosity of the fluid. f =7.01, Pr w =2.23 (assuming the copper column wall temperature T w =80℃) According to the heat transfer calculation formula of the fluid sweeping across the plug-in tube bundle, the following is available:

[0080] Nu=0.27Re 0.63 Pr 0.36 (Pr f / Pr w ) 0.24 ;

[0081] After calculation, Nu = 359.3; H = Nu × λ / d = 42038.1 W / (m 2 ·℃); q=H×(T w -T f )=2582286W / m 2 ; Assume the total heat exchange area is Sa (S a is the sum of the areas of all the collector columns and the coolant contact positions); P = q × S a =426W Therefore, the maximum heat exchange power of a single external cooling device is 426W, which has a strong cooling effect.

[0082] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application.

Claims

1. An external cooling device, characterized in that: The external cooling device includes a main shell and a plurality of heat collecting columns; The main housing is internally formed with a cavity for cooling water to pass through; A liquid inlet and a liquid outlet communicating with the cavity are respectively provided on both sides of the main shell; The plurality of heat collecting columns all pass through the main shell and the cavity; The heat exchange ends of the plurality of heat collecting columns exposed outside the main shell can contact with external samples to perform heat exchange.

2. The external cooling device according to claim 1, characterized in that: The external cooling device also includes a cover plate and a plurality of partitions; One side of the main shell is open, and the cover plate seals one side of the main shell; The plurality of partitions are arranged in the cavity at intervals along the first direction to form a bottom layer, a middle layer and an upper layer; each of the heat collecting columns extends along the first direction, and the heat collecting columns sequentially pass through the cover plate, the plurality of partitions and the main shell; The cooling liquid can enter the cavity through the liquid inlet, pass through the bottom layer, the middle layer and the upper layer in sequence, and flow out of the cavity through the liquid outlet.

3. The external cooling device according to claim 2, characterized in that: The external cooling device also includes a first baffle and a second baffle; The first baffle plate and the second baffle plate are both disposed in the cavity, and the first baffle plate and the second baffle plate are respectively located on two sides of the main housing that are opposite to each other in the second direction; The first baffle plate and the main shell form a first collecting chamber, the second baffle plate and the main shell form a second collecting chamber, and the two sides of the main shell opposite to each other in the second direction are respectively provided with a liquid inlet and a liquid outlet communicating with the first collecting chamber and the second collecting chamber; The plurality of partitions are spaced apart between two of the baffles along the first direction to form the bottom layer, the middle layer and the upper layer; A first notch is provided at the bottom of the first baffle plate, and a second notch is provided at the top of the second baffle plate; the coolant can enter the first collecting chamber from the liquid inlet, pass through the first notch, the bottom layer, the middle layer, the upper layer, the second notch and the second collecting chamber in sequence, and flow out from the liquid outlet.

4. The external cooling device according to claim 2, characterized in that: The external cooling device further comprises a first cover, a second cover, a first sealing gasket and a second sealing gasket; The first sealing gasket is press-fitted between the first cover and the cover plate; The second sealing gasket is press-fitted between the second cover and the main housing; The heat collecting column passes through the first cover, the first sealing gasket, the cover plate, the plurality of partitions, the main shell, the second sealing gasket and the second cover in sequence.

5. The external cooling device according to claim 3, characterized in that: The external cooling device also includes a clamping frame and a knob; The clamping frame comprises a clamping plate and a driving plate connected to each other; The clamping plate includes a plurality of through holes for installing the plurality of heat collecting columns, the knob is threadedly connected to the driving plate, and the end of the knob abuts against the main housing; The knob can be rotated to drive the clamping frame to move along the second direction, so that the multiple through holes of the clamping plate clamp the heat collecting column to limit the movement of the heat collecting column along the first direction; the first direction is perpendicular to the second direction.

6. The external cooling device according to claim 2, characterized in that: The external cooling device also includes a first outer shell, a second outer shell and a driving mechanism; The first outer shell is connected to the second outer shell to wrap the main shell together; The main housing is slidably connected to the first outer housing and the second outer housing; The driving mechanism is disposed on the first outer shell or the second outer shell to drive the main shell to slide along the first direction.

7. The external cooling device according to claim 6, characterized in that: The external cooling device also includes a positioning bracket; A fixed disc is disposed on the outer side of the first outer shell or the second outer shell, and a plurality of notches with the same structure are disposed along the circumference of the fixed disc; The positioning bracket comprises a universal disc matched with the fixed disc, a plurality of protrusions with the same structure are arranged along the circumference of the universal disc, and any of the defective portions is matched with any of the protrusions.

8. The external cooling device according to any one of claims 1 to 7, characterized in that: The heat collecting column of the external cooling device is used to contact the storage oil tank of the driving axle or transmission of the vehicle.

9. A cooling system, characterized in that: comprising an external cooling device as claimed in any one of claims 1 to 8; The cooling system also includes a liquid inlet tank, a liquid return tank, a pump body, a first three-way throttle valve, an oil temperature collection unit and a control unit; The liquid inlet tank is connected to the liquid inlet of the first three-way throttle valve via the pump body, the first liquid outlet of the first three-way throttle valve is connected to the liquid inlet of the external cooling device, and the second liquid outlet of the first three-way throttle valve and the liquid outlet of the external cooling device are both connected to the liquid return tank; The control unit is pre-set with a first target value; Before the oil temperature of the first sample collected by the oil temperature collection unit reaches the first target value, the first liquid outlet of the first three-way throttle valve is closed and the second liquid outlet is opened; When the oil temperature of the first sample collected by the oil temperature collection unit reaches the first target value, the control unit controls the first liquid outlet of the first three-way throttle valve to open and the second liquid outlet to close; then, the control unit controls the opening of the second liquid outlet and the first liquid outlet of the first three-way throttle valve to keep the oil temperature of the first sample within the floating range of the first target value.

10. The cooling system according to claim 9, characterized in that The cooling system further comprises a second three-way throttle valve, a first external cooling device and a second external cooling device; The first liquid outlet of the first three-way throttle valve is connected to the liquid inlet of the second three-way throttle valve, the first liquid outlet of the second three-way throttle valve is connected to the liquid inlet of the first external cooling device, the second liquid outlet of the second three-way throttle valve is connected to the liquid inlet of the second external cooling device, and the liquid outlet of the first external cooling device and the liquid outlet of the second external cooling device are both connected to the liquid return tank; The control unit is pre-set with a second target value; Before the oil temperature of the first sample collected by the oil temperature collection unit reaches the first target value, the first liquid outlet of the first three-way throttle valve is closed and the second liquid outlet is opened; When the oil temperature of the first sample collected by the oil temperature collection unit reaches the first target value, but before the oil temperature of the second sample reaches the second target value, the control unit controls the first liquid outlet of the first three-way throttle valve to open and the second liquid outlet to close; subsequently, the control unit controls the openings of the second liquid outlet and the first liquid outlet of the first three-way throttle valve so that the oil temperature of the first sample is maintained within the floating range of the first target value; When the oil temperature of the second sample collected by the oil temperature collection unit reaches the second target value, the first liquid outlet of the first three-way throttle valve is closed and the second liquid outlet is opened; and the control unit controls both the first liquid outlet and the second liquid outlet of the second three-way throttle valve to be opened; then, the control unit controls the opening of the second liquid outlet and the first liquid outlet of the second three-way throttle valve so that the oil temperature of the first sample is maintained within the floating range of the first target value, and the oil temperature of the second sample is maintained within the floating range of the second target value.

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