A high-temperature resistant servo drive for oil exploration engineering

Abstract

This invention discloses a high-temperature resistant servo drive for oil exploration engineering, applied in the field of actuators. This solution integrates external heat-conducting components at the gaps between the heat dissipation fins, providing an active heat dissipation channel for the servo drive in a confined space, thus solving the problem of heat dissipation difficulties in small spaces for servo drives in the prior art. Furthermore, with the adjustable gap plate assembly, the cooling liquid can be controlled to operate in different states under varying heat dissipation requirements by controlling the unit-time flow rate of the cooling liquid. This allows the servo drive to continuously switch between a state of rapid heat absorption in an integrated manner and a state of rapid heat dissipation in a dispersed manner. Combined with air cooling and water cooling, this significantly reduces the overall temperature of the servo drive. Compared to the existing technology that only uses contact conduction for heat dissipation, this servo drive can maintain good performance and is less prone to damage in the high-temperature environment of drilling.

Description

Technical Field

[0001] This invention relates to the field of drives, and in particular to a high-temperature resistant servo drive for oil exploration engineering. Background Technology

[0002] A servo drive, also known as a "servo controller" or "servo amplifier," is a controller used to control servo motors. Its function is similar to that of a frequency converter for a regular AC motor. It is part of a servo system and is primarily used in high-precision positioning systems. Generally, it controls the servo motor through position, speed, and torque to achieve high-precision transmission system positioning. It is a high-end product in transmission technology. When a servo drive is in use, the electrical components generate a lot of heat, therefore, an integrated heatsink is usually required for auxiliary cooling, such as the servo drive disclosed in Chinese patent CN114364219B.

[0003] However, in oil exploration, servo drives are generally integrated into drill collars or logging instruments, where space is limited. Furthermore, to prevent mud slurry, water damage, and high pressure, the drive must be strictly sealed inside the equipment, making active cooling methods such as fans unusable. For example, Chinese patent application CN108574436A discloses a servo drive energy recovery system and method, in which heat is typically transferred from the internal chip through thermally conductive materials to the high-surface heat dissipation fins on the casing, and finally to the wellbore mud via contact heat conduction. However, this method has high thermal resistance, and during oil drilling, the downhole temperature is generally high. The difficult heat dissipation environment makes the chip and other electrical components inside the drive extremely susceptible to damage, affecting the efficiency of oil drilling. Summary of the Invention

[0004] The core of this invention lies in providing an active heat dissipation channel for the servo drive in a confined space by integrating an external heat-conducting component at the gaps between the heat dissipation fins, thereby solving the problem of heat dissipation difficulties for servo drives in small spaces in the prior art.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A high-temperature resistant servo driver for oil exploration engineering includes a driver body. Multiple uniformly distributed heat dissipation fins are fixedly connected to the outer end face of the driver body. An external heat conduction component is jointly arranged on the outer side of the multiple heat dissipation fins. The external heat conduction component includes an external heat dissipation plate, an upper heat dissipation component and a lower heat dissipation component respectively arranged at the upper and lower ends of the external heat dissipation plate, and an air guide component arranged outside the external heat dissipation plate. The external heat dissipation plate includes a back plate and multiple heat-gathering strips fixedly connected to the surface of the back plate near the driver body. The multiple heat-gathering strips are distributed with the multiple heat dissipation fins at intervals. The back plate and the driver body are fixedly connected by multiple support rods. The air guide component includes a semi-circular main pipe and multiple branch pipes fixedly connected to the straight end face of the semi-circular main pipe. The multiple branch pipes all face the space between the external heat dissipation plate and the heat dissipation fins. An air inlet pipe is fixedly connected to one end of the semi-circular main pipe.

[0007] Both the upper and lower heat dissipation components include a main liquid guide pipe and multiple evenly distributed branch pipes fixedly connected to the straight end face of the main liquid guide pipe. The multiple branch pipes are fixed and connected to the external heat dissipation plate. The ends of the upper and lower heat dissipation components that are far apart from each other are respectively fixedly connected to a drain pipe and a liquid inlet pipe. The drain pipe and the air inlet pipe are located on the same side.

[0008] Furthermore, multiple sets of expansion cavities are excavated inside the back plate. The expansion cavities include rectangular cavities and connecting holes that connect the rectangular cavities and the heat-gathering inserts. The multiple rectangular cavities are staggered with the multiple heat-gathering inserts. The branch pipes on the upper heat exhaust assembly and the lower heat exhaust assembly are connected to the upper and lower ends of the corresponding rectangular cavities, respectively.

[0009] Furthermore, the heat-concentrating insert includes two pre-expanded heat-conducting plates and a wrapping layer fixedly connected between the two pre-expanded heat-conducting plates near their edges. The wrapping layer is made of a high-temperature resistant elastic material.

[0010] Furthermore, the pre-expanded heat-conducting plate includes a fixed section fixedly connected to the back plate, a connecting layer fixedly connected to the end of the fixed section, and an extension section fixedly connected to the end of the connecting layer away from the back plate. The fixed section and the extension section are both made of rigid heat-conducting material, and the connecting layer is made of elastic heat-conducting material.

[0011] Furthermore, an expansion assembly is provided between two adjacent heat dissipation fins. The expansion assembly includes a limiting rod fixedly connected between two adjacent heat dissipation fins and two gap plate assemblies movably sleeved outside the limiting rod. The two gap plate assemblies are located on both sides of the heat-gathering insert. The gap plate assemblies include multiple metal plates and multiple reset strips fixedly connected between the ends of two adjacent metal plates.

[0012] Furthermore, the reset strip is made of an elastic arc-shaped material, and the reset strip bends in the direction away from the metal sheet.

[0013] Furthermore, multiple metal plates in the same gap plate assembly are movably sleeved outside the limiting rod, and two metal plates located at the edge are fixedly connected to the heat dissipation fins and the heat-gathering inserts, respectively.

[0014] Furthermore, the air duct assembly is positioned above the external heat sink, and the air duct assembly is fixedly connected to multiple heat sink fins.

[0015] Optionally, the air guide assembly is located in the middle of the external heat sink, and multiple air pipes are fixedly connected through the back plate. The upper and lower ends of the air pipes between the back plate and the driver body are fixedly connected to the shunt pipes, which are fixed and connected to the air pipes.

[0016] Furthermore, two airflow guides are fixedly connected to the middle of the external heat sink near the heat dissipation fins, and the ends of the two airflow guides near the external heat sink are inclined away from the direction of the splitter pipe.

[0017] Compared with the prior art, the advantages of this invention are:

[0018] (1) This solution integrates external heat-conducting components at the gaps between the heat dissipation fins to provide an active heat dissipation channel for the servo drive in a small space, thereby solving the problem of heat dissipation difficulties for the servo drive in a small space in the prior art.

[0019] (2) With the setting of the gap plate group, when the heat dissipation demand is high, the amount of cooling medium introduced into the external heat dissipation plate per unit time can be increased, causing the heat-gathering strip to expand and then squeeze the gap plate group, so that it is in close contact with the heat-gathering strip, thereby establishing a complete heat exchange channel, so that the heat accumulated at the heat dissipation fins can be quickly exchanged with the cooling medium in the heat-gathering strip; when the heat dissipation demand is low, the amount of cooling medium introduced per unit time can be reduced, so that the heat-gathering strip gradually recovers. At this time, the gap plate group gradually disperses, so that the heat dissipation area of ​​the gap plate group that has accumulated a lot of heat increases several times. At this time, in conjunction with the gas blown out from the air guide component, the heat dissipation speed of the gap plate group can be significantly accelerated. Compared with the existing technology of only contact conduction heat dissipation, the overall temperature is greatly reduced, so that it can maintain good performance and is not easily damaged during drilling work. Attached Figure Description

[0020] Figure 1 This is an exploded view of the present invention;

[0021] Figure 2 This is a perspective view of the present invention;

[0022] Figure 3 This is a perspective view of the external heat sink of the present invention;

[0023] Figure 4 This is a top view of the external heat sink portion of the present invention;

[0024] Figure 5 This is a perspective view of the lower heat dissipation assembly of the present invention;

[0025] Figure 6 This is a cross-sectional view of the heat-concentrating insert portion of the present invention;

[0026] Figure 7 A schematic diagram showing the addition of an area-enhancing component to the heat dissipation fins of the present invention;

[0027] Figure 8 This is a schematic diagram of the gap plate assembly of the present invention being squeezed into close contact with the heat dissipation fins;

[0028] Figure 9 This is a schematic diagram comparing the two different states of the surface enhancement component of the present invention: dispersion and aggregation.

[0029] Figure 10 This is a schematic diagram of the air guide assembly of the present invention being disposed in the middle of the external heat sink.

[0030] Figure 11 This is a perspective view of the air guide assembly located in the middle of the external heat sink in this invention;

[0031] Figure 12 This is a cross-sectional schematic diagram of the air guide assembly located in the middle of the external heat sink in this invention.

[0032] Explanation of the labels in the diagram:

[0033] 1. Driver body, 101. Support rod, 2. Heat sink fins, 3. External heat sink plate, 31. Backplate, 32. Heat-concentrating strip, 321. Fixing section, 322. Connecting layer, 323. Extension section, 324. Wrapping layer, 301. Connecting hole, 302. Rectangular cavity, 4. Air guide assembly, 401. Inlet pipe, 41. Semi-circular main pipe, 42. Branch pipe, 43. Diverter pipe, 44. Guide plate, 5. Upper heat exhaust assembly, 501. Drain pipe, 6. Lower heat exhaust assembly, 601. Inlet pipe, 61. Main liquid guide pipe, 62. Branch liquid guide pipe, 71. Metal sheet, 72. Limiting rod, 73. Reset strip. Detailed Implementation

[0034] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0035] First implementation method:

[0036] like Figures 1-2A high-temperature resistant servo driver for oil exploration engineering includes a driver body 1. Multiple uniformly distributed heat dissipation fins 2 are fixedly connected to the outer end face of the driver body 1. An external heat conduction component is provided on the outer side of the multiple heat dissipation fins 2. The external heat conduction component includes an external heat dissipation plate 3, an upper heat dissipation component 5 and a lower heat dissipation component 6 respectively disposed at the upper and lower ends of the external heat dissipation plate 3, and an air guide component 4 disposed outside the external heat dissipation plate 3. The air guide component 4 is disposed above the external heat dissipation plate 3 and is fixedly connected to the multiple heat dissipation fins 2. The air guide component 4 includes a semi-circular main pipe 41 and multiple branch pipes 42 fixedly connected to the straight end face of the semi-circular main pipe 41. The multiple branch pipes 42 all face the space between the external heat dissipation plate 3 and the heat dissipation fins 2. An air inlet pipe 401 is fixedly connected to one end of the semi-circular main pipe 41.

[0037] like Figure 5 Both the upper heat dissipation assembly 5 and the lower heat dissipation assembly 6 include a main liquid guiding pipe 61 and multiple evenly distributed branch pipes 62 fixedly connected to the straight end face of the main liquid guiding pipe 61. The multiple branch pipes 62 are fixed to and communicate with the external heat dissipation plate 3. The ends of the upper heat dissipation assembly 5 and the lower heat dissipation assembly 6 that are far apart from each other are respectively fixedly connected to a drain pipe 501 and an inlet pipe 601. The drain pipe 501 and the air inlet pipe 401 are located on the same side. In use, a low-temperature cooling medium (low-temperature air, low-temperature water, or other non-toxic low-temperature fluid) can be introduced into the lower heat dissipation assembly 6 through the inlet pipe 601. The cooling medium moves upward along the external heat dissipation plate 3. The upper heat-concentrating insert 32 is spaced apart from multiple heat dissipation fins 2, which effectively reduces the ambient temperature near the heat dissipation fins 2, allowing the heat on the heat dissipation fins 2 to dissipate heat into the environment more quickly, thus accelerating heat dissipation. Finally, the low-temperature water that has absorbed heat enters the upper heat dissipation assembly 5 and is discharged along the drain pipe 501. At the same time, low-temperature air can be introduced into the air guide assembly 4, allowing the low-temperature air to enter between the multiple heat dissipation fins 2, and then to conduct forced convection with the space between the heat dissipation fins 2 and the external heat sink 3, so that the air that has absorbed heat around the heat dissipation fins 2 can be quickly discharged. Through the combination of liquid cooling and air cooling, the heat dissipation effect of this driver is significantly improved.

[0038] In addition, multiple heat-gathering strips 32 on the external heat sink 3 can be inserted into multiple heat sink fins 2, effectively reducing the space requirement and adapting to the driver which is encapsulated in a small space.

[0039] like Figure 3 The external heat sink 3 includes a backplate 31 and multiple heat-gathering strips 32 fixedly connected to the surface of the backplate 31 near the driver body 1. The multiple heat-gathering strips 32 are distributed with multiple heat dissipation fins 2 at intervals. The backplate 31 and the driver body 1 are fixedly connected by multiple support rods 101. Figure 4The backplate 31 has multiple sets of expansion cavities inside. The expansion cavities include rectangular cavities 302 and connecting holes 301 that connect the rectangular cavities 302 and the heat-gathering inserts 32. The multiple rectangular cavities 302 are staggered with the multiple heat-gathering inserts 32, so that the positions of the multiple rectangular cavities 302 correspond to the positions of the multiple heat dissipation fins 2. Some of the heat radiated and diffused into the environment on the heat dissipation fins 2 can be directly absorbed by the low-temperature liquid in the rectangular cavity 302, which increases the overall effective heat exchange area of ​​the external heat dissipation plate 3 and effectively improves the heat dissipation effect. The branch pipes 62 on the upper heat dissipation component 5 and the lower heat dissipation component 6 are respectively connected to the upper and lower ends of the corresponding rectangular cavities 302, so that the low-temperature liquid can pass through the heat-gathering inserts 32 and the external heat dissipation plate 3 before being discharged, so that it can fully absorb the heat at the heat dissipation fins 2.

[0040] like Figure 6 The heat-concentrating insert 32 includes two pre-expanded heat-conducting plates and a wrapping layer 324 fixedly connected between the edges of the two pre-expanded heat-conducting plates. The wrapping layer 324 is made of a high-temperature resistant elastic material. The width of the heat-concentrating insert 32 is adjustable by the wrapping layer 324. The pre-expanded heat-conducting plate includes a fixed section 321 fixedly connected to the back plate 31, a connecting layer 322 fixedly connected to the end of the fixed section 321, and an extension section 323 fixedly connected to the end of the connecting layer 322 away from the back plate 31. The fixed section 321 and the extension section 323 are both made of rigid heat-conducting material, and the connecting layer 322 is made of elastic heat-conducting material.

[0041] like Figure 7 An expansion assembly is also provided between two adjacent heat dissipation fins 2. The expansion assembly includes a limiting rod 72 fixedly connected between the two adjacent heat dissipation fins 2 and two gap plate assemblies movably sleeved outside the limiting rod 72. The two gap plate assemblies are located on both sides of the heat-gathering insert 32. Each gap plate assembly includes multiple metal pieces 71 and multiple reset strips 73 fixedly connected between the ends of two adjacent metal pieces 71. Multiple metal pieces 71 in the same gap plate assembly are movably sleeved outside the limiting rod 72. The two metal pieces 71 located at the edge are fixedly connected to the heat dissipation fins 2 and the heat-gathering insert 32, respectively. Figures 8-9During use, when the heat dissipation demand is high, the flow rate of coolant per unit time can be increased, causing the heat-gathering insert 32 to be squeezed and expanded, which in turn squeezes multiple metal sheets 71. This gradually reduces the gaps between the multiple metal sheets 71 and they converge until they come into contact with each other, forming a single unit. At this point, the heat on the heat dissipation fins 2 can be transferred along the multiple metal sheets 71 to the heat-gathering insert 32, thereby accelerating the heat exchange rate between the heat and the coolant in the external heat sink 3. When the heat dissipation demand is low, the flow rate per unit time can be reduced, causing the heat-gathering insert 32 to gradually return to its original position. At this point, the multiple metal sheets 71 are pulled away from each other, resulting in a state of gap separation. This significantly increases the overall surface area of ​​the gap plate assembly after heat absorption. Combined with the forced convection of low-temperature air from the air guide component 4, this further accelerates heat dissipation. In practical use, the rate of cold liquid flow per unit time can be adjusted intermittently, causing the heat-gathering insert 32 to repeatedly undergo an expansion-recovery-expansion process. This allows the gap plate assembly to repeatedly exhibit a concentrated, rapid heat absorption state followed by a dispersed state. This high surface area and rapid heat dissipation significantly improves heat dissipation efficiency compared to existing technologies. Furthermore, it effectively maintains the stability of the servo drive's performance and protects the internal chips and other electrical components from damage.

[0042] The reset strip 73 is made of an elastic arc-shaped material and bends in the direction away from the metal sheet 71. During the restoration process of the heat-concentrating insert 32, the reset strip 73 is restored accordingly, which can effectively assist the uniform dispersion of multiple metal sheets 71 and effectively avoid the situation where some metal sheets 71 come into contact with each other and fail to disperse in time.

[0043] This solution integrates external heat-conducting components at the gaps between the heat dissipation fins, providing an active heat dissipation channel for the servo drive in a confined space. This addresses the problem of heat dissipation difficulties for servo drives in small spaces, as is often the case in existing technologies. Furthermore, with the gap plate assembly, the amount of cooling medium introduced into the external heat sink 3 per unit time can be increased when heat dissipation demand is high. This causes the heat-gathering insert 32 to expand, compressing the gap plate assembly and ensuring close contact with it. This establishes a complete heat exchange channel, allowing the heat accumulated at the heat dissipation fins 2 to rapidly exchange heat with the cooling medium within the heat-gathering insert 32. When heat dissipation demand is low, the amount of cooling medium introduced per unit time can be reduced, allowing the heat-gathering insert 32 to gradually recover. The gap plate assembly then gradually disperses, increasing the heat dissipation area of ​​the heat-gathering assembly several times over. Combined with the air blown out from the air guide assembly 4, this significantly accelerates the heat dissipation speed of the gap plate assembly. Compared to existing technologies that rely solely on contact conduction for heat dissipation, this method drastically reduces the overall temperature, ensuring good performance and minimizing damage during drilling operations.

[0044] Second implementation method:

[0045] This embodiment is based on the first embodiment, but changes the setting position of the air guide component 4, while the rest remains the same as the first embodiment.

[0046] like Figures 10-11 The air guide assembly 4 is located in the middle of the external heat sink 3, and multiple air branches 42 are fixedly connected to the back plate 31. The upper and lower ends of the air branches 42 between the back plate 31 and the driver body 1 are fixedly connected to shunt pipes 43. The shunt pipes 43 are fixed to and communicate with the air branches 42. Figure 12 Two guide plates 44 are fixedly connected to the middle part of the external heat sink 3 near the heat sink fin 2. The ends of the two guide plates 44 near the external heat sink 3 are inclined in a direction away from the split pipe 43.

[0047] By placing the air guide assembly 4 in the middle of the external heat sink 3 and diverting the air through the upper and lower distributed diversion pipes 43, the path of the low-temperature air that enters the space between the external heat sink 3 and the heat sink fins 2 through the air inlet pipe 401 is shortened to only half that of the first embodiment. This effectively accelerates the exhaust of hot air between the external heat sink 3 and the multiple heat sink fins 2. Compared with the first embodiment, this effectively avoids the accumulation of some hot air at the other end of the air guide assembly 4 due to the excessively long path of low-temperature air overflow, thus improving the convection effect and making the heat dissipation effect better. In addition, under the action of the guide plate 44, the airflow can be effectively guided so that the low-temperature air flows towards the heat sink fins 2, allowing the low-temperature air to fully contact and exchange heat with the multiple metal plates 71.

[0048] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A high-temperature resistant servo drive for oil exploration engineering, comprising a drive body (1), wherein a plurality of uniformly distributed heat dissipation fins (2) are fixedly connected to the outer end face of the drive body (1), characterized in that: An external heat-conducting component is provided on the outer side of multiple heat dissipation fins (2). The external heat-conducting component includes an external heat sink (3), an upper heat dissipation component (5) and a lower heat dissipation component (6) respectively disposed at the upper and lower ends of the external heat sink (3), and an air guide component (4) disposed outside the external heat sink (3). The external heat sink (3) includes a back plate (31) and multiple heat-gathering strips (32) fixedly connected to the surface of the back plate (31) near the driver body (1). The backplate (31) and the driver body (1) are fixedly connected by multiple support rods (101). The air guide assembly (4) includes a semi-circular main pipe (41) and multiple branch pipes (42) fixedly connected to the straight end face of the semi-circular main pipe (41). The multiple branch pipes (42) are all facing the space between the external heat sink (3) and the heat sink (2). One end of the semi-circular main pipe (41) is fixedly connected to an air inlet pipe (401). The upper heat dissipation assembly (5) and the lower heat dissipation assembly (6) both include a liquid guiding main pipe (61) and a plurality of evenly distributed branch pipes (62) fixedly connected to the straight end face of the liquid guiding main pipe (61). The plurality of branch pipes (62) are fixed and connected to the external heat dissipation plate (3). The ends of the upper heat dissipation assembly (5) and the lower heat dissipation assembly (6) that are far apart from each other are respectively fixedly connected to a drain pipe (501) and an inlet pipe (601). The drain pipe (501) and the air inlet pipe (401) are located on the same side. An expansion assembly is also provided between two adjacent heat dissipation fins (2). The expansion assembly includes a limiting rod (72) fixedly connected between two adjacent heat dissipation fins (2) and two gap plate groups movably sleeved outside the limiting rod (72). The two gap plate groups are located on both sides of the heat-gathering insert (32). The gap plate group includes multiple metal pieces (71) and multiple reset strips (73) fixedly connected between the ends of two adjacent metal pieces (71). Multiple metal pieces (71) in the same gap plate group are movably sleeved outside the limiting rod (72). The two metal pieces (71) located at the edge are fixedly connected to the heat dissipation fins (2) and the heat-gathering insert (32) respectively.

2. The high-temperature resistant servo drive for oil exploration engineering according to claim 1, characterized in that: The back plate (31) has multiple sets of expansion cavities inside. The expansion cavities include rectangular cavities (302) and connecting holes (301) that connect the rectangular cavities (302) and the heat-gathering inserts (32). The multiple rectangular cavities (302) are staggered with the multiple heat-gathering inserts (32). The branch pipes (62) on the upper heat exhaust assembly (5) and the lower heat exhaust assembly (6) are connected to the upper and lower ends of the corresponding rectangular cavities (302).

3. A high-temperature resistant servo drive for oil exploration engineering according to claim 2, characterized in that: The heat-conducting insert (32) includes two pre-expanded heat-conducting plates and a wrapping layer (324) fixedly connected between the two pre-expanded heat-conducting plates near each other's edges. The wrapping layer (324) is made of a high-temperature resistant elastic material.

4. A high-temperature resistant servo drive for oil exploration engineering according to claim 3, characterized in that: The pre-expanded heat-conducting plate includes a fixed section (321) fixedly connected to the back plate (31), a connecting layer (322) fixedly connected to the end of the fixed section (321), and an extension section (323) fixedly connected to the end of the connecting layer (322) away from the back plate (31). The fixed section (321) and the extension section (323) are both made of rigid heat-conducting material, and the connecting layer (322) is made of elastic heat-conducting material.

5. A high-temperature resistant servo drive for oil exploration engineering according to claim 1, characterized in that: The reset strip (73) is made of an elastic arc-shaped material and is bent toward the side away from the metal sheet (71).

6. A high-temperature resistant servo drive for oil exploration engineering according to claim 1, characterized in that: The air guide assembly (4) is disposed above the external heat sink (3), and the air guide assembly (4) is fixedly connected to multiple heat sink fins (2).

7. A high-temperature resistant servo drive for oil exploration engineering according to claim 1, characterized in that: The air guide assembly (4) is located in the middle of the external heat sink (3), and multiple branch pipes (42) are fixedly connected through the back plate (31). The upper and lower ends of the branch pipes (42) between the back plate (31) and the driver body (1) are fixedly connected to the diverter pipes (43). The diverter pipes (43) are fixed and connected to the branch pipes (42).

8. A high-temperature resistant servo drive for oil exploration engineering according to claim 7, characterized in that: Two guide plates (44) are fixedly connected to the middle part of the external heat sink (3) near the heat sink fins (2). The ends of the two guide plates (44) near the external heat sink (3) are inclined away from the split pipe (43).

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