Large server liquid cooling pump, liquid cooling system and working mode of liquid cooling pump thereof

Abstract

The application discloses a large server liquid cooling pump, a liquid cooling system and a working mode of the liquid cooling pump, and relates to the technical field of liquid cooling pumps.The application comprises a multi-sided box body and a pump liquid unit;each side wall of the multi-sided box body is provided with a motor cavity;the pump liquid unit comprises a motor, a connecting shaft rod and a pump liquid box;the inner wall of the motor cavity is provided with a sealing and limiting component sleeved on the connecting shaft rod;the rotating shaft end of the motor is sealingly abutted on the sealing and limiting component;the rotating shaft of the motor is butted with the connecting shaft rod;the clearance for refrigerant flow is left between the outer wall of the motor and the inner wall of the motor cavity;the tail end of the motor is provided with a blocking plate;the blocking plate is provided with a plurality of refrigerant discharge pipes;each inner wall of the multi-sided refrigerant cavity is correspondingly provided with a pump liquid box;two adjacent refrigerant discharge pipes on adjacent blocking plates are communicated through a communication pipe.The application solves the problems of the existing large server liquid cooling pump, such as abnormal liquid supply, troublesome maintenance, disassembly and maintenance, and the like.

Description

Technical Field

[0001] This invention belongs to the field of liquid cooling pump technology, and in particular relates to a large server liquid cooling pump, a liquid cooling system and a method for controlling the operation of the liquid cooling pump. Background Technology

[0002] Server liquid cooling pumps are specialized pumps for server cold plates, CDUs (Cooling Distribution Units), and submersible liquid cooling circulation systems. They are considered the "heart" of the liquid cooling system, requiring 24 / 7 uninterrupted operation, low noise, zero leakage, and a long lifespan. However, prolonged use can cause the internal motor of the liquid cooling pump to generate heat that cannot be dissipated in time, leading to motor damage. Once the server liquid cooling pump motor fails and cannot pump liquid, server overheating will occur very quickly. Large server liquid cooling pumps require multiple inlet and outlet pipes to dissipate heat from different locations on the large server. A single liquid cooling pump can hardly meet the diverse cooling needs of multiple locations on a server. Repairing a liquid cooling pump in a large server configuration is relatively difficult. The inability to continue supplying refrigerant during repairs complicates the process, and the inability to maintain server cooling during repairs can lead to ineffective cooling and ultimately server damage. Summary of the Invention

[0003] The purpose of this invention is to provide a large server liquid cooling pump, a liquid cooling system, and a method for controlling the operation of the liquid cooling pump. By providing multiple pumping units on the side walls of the polygonal housing, a backup pumping unit can be activated to supply liquid in case of liquid supply abnormality. Each pumping unit can be disassembled and repaired without stopping the operation of the liquid cooling pump. This solves the problems of troublesome maintenance of existing large server liquid cooling pumps in case of liquid supply abnormality and the inability to continue operating the liquid cooling pump after disassembly and maintenance.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: The present invention is a large server liquid cooling pump, comprising a polygonal housing and a pumping unit installed on each side of the polygonal housing; The side walls of the polygonal box are thickened, and a motor cavity is opened in each side wall of the polygonal box. A polygonal refrigerant cavity is provided inside the polygonal box. A refrigerant inlet main pipe is provided at the bottom of the polygonal box. The top of the polygonal box is sealed with a polygonal cap. The pumping unit includes a motor, a coupling rod, and a pumping liquid box. Each side wall of the polygonal box has a coupling rod hole on the wall between the motor cavity and the polygonal refrigerant cavity. The coupling rod is inserted into the coupling rod hole. A sealing and limiting component is installed on the inner wall of the motor cavity and fitted onto the coupling rod. The motor shaft end is sealed against the sealing and limiting component. The motor shaft is connected to the coupling rod. The motor and the motor cavity are coaxial. A refrigerant flow gap is left between the outer wall of the motor and the inner wall of the motor cavity. A sealing plate is provided at the tail end of the motor. The sealing plate seals the opening of the motor cavity. The sealing plate is provided with multiple refrigerant discharge pipes. A pumping liquid box is correspondingly configured on each inner wall of the polygonal refrigerant cavity. The inlet of the pumping liquid box communicates with the inside of the polygonal refrigerant cavity. Multiple outlet pipes are provided on the side wall of the pumping liquid box. The outlet pipes penetrate the side wall of the polygonal box and are inserted into the refrigerant flow gap. Two adjacent refrigerant discharge pipes on adjacent sealing plates are connected by a connecting pipe, and a connecting solenoid valve is installed in the connecting pipe.

[0005] The present invention is further configured such that the polygonal box has at least 8 sidewalls and the number of sidewalls is an even number, and the pumping unit is arranged alternately with one main supply unit and one standby unit; Each of the pumping units operates independently. When the main supply unit experiences an abnormality in its liquid supply, the pumping function of that main supply unit is stopped, the adjacent standby unit is started, and the connecting solenoid valve in the connecting pipe between the abnormal main supply unit and the standby unit is opened.

[0006] The invention is further configured such that the number of refrigerant discharge pipes on the sealing plate is not less than four and they are evenly distributed in a ring. Each refrigerant discharge pipe not connected to the connecting pipe is provided with a first solenoid valve. The refrigerant inlet main pipe is provided with multiple inlet branch pipes, and each inlet branch pipe is provided with a second solenoid valve. The outlet pipe is provided with a one-way valve at the outlet end, and the one-way valve opens unidirectionally toward the refrigerant flow gap.

[0007] The present invention is further configured such that the motor includes a housing, a stator, a rotor, and a rear end cover; the stator is attached to the inner wall of the housing; the front end of the housing is provided with an abutting circular groove; the center position of the front end of the housing is provided with a plug-in rod hole; the shaft end of the rotor is provided with a cross plug-in rod; the cross plug-in rod is inserted into the plug-in rod hole; the abutting circular groove abuts against the sealing and limiting assembly; and the rear end cover is screwed onto the opening position of the rear end of the housing. The rear end wall of the outer shell is provided with an outwardly extending sealing plate, and a sealing gasket is provided between the sealing plate and the outer wall of the polygonal box.

[0008] The present invention is further configured such that the sealing and limiting assembly includes a limiting sleeve and a compression sealing gasket. The limiting sleeve includes a bonding ring and a sleeve. The upper surface of the bonding ring is connected to an integral sleeve. A limiting circular hole is provided at the center of the bonding ring. The inner diameter of the limiting circular hole is larger than the inner diameter of the sleeve. A limiting ring is provided near the tail end of the connecting rod. A cross groove matching the end of the cross-shaped connector is provided on the tail end of the connecting rod. The limiting ring is matched and locked in the limiting circular hole. The tail end of the connecting rod is inserted into the sleeve. The bonding ring is attached to the inner wall of the motor cavity and fixed with bolts. The compression sealing gasket is sleeved on the outside of the sleeve and attached to the bonding ring. The abutting groove is fastened onto the compression sealing gasket, and the compression sealing gasket is squeezed to achieve a butt seal.

[0009] The present invention is further configured such that the pump liquid box includes a circular box body, a circular cover and a centrifugal impeller assembly, the bottom of the circular box body is provided with a shaft circular hole, the inside of the circular box body is an impeller cavity, a plurality of mounting bolt plates are provided around the outer wall of the circular box body, the liquid outlet pipe is connected to the side wall of the circular box body, the circular box body is attached to the inner wall of the polygonal box body and the mounting bolt plates are fixed to the inner wall with bolts, and the connecting rod passes through the shaft circular hole and extends into the interior of the circular box body; The centrifugal impeller assembly includes a closed impeller and an impeller sealing plate. The closed impeller includes a back plate and multiple curved impellers. Curved impellers are evenly welded onto the back plate. The back plate is bolted to the end of the connecting rod at its center. Multiple height-limiting posts are provided around the edge of the back plate. The impeller sealing plate is attached to the multiple height-limiting posts and fixed with bolts. A first liquid inlet hole is provided at the center of the impeller sealing plate. A second liquid inlet hole is provided at the center of the circular cover. The circular cover seals the circular box body.

[0010] The present invention is further configured such that the second solenoid valve in each of the liquid inlet branch pipes is an oil pressure sensing solenoid valve, and the heat transfer oil filled in the polygonal box of the liquid cooling pump is high viscosity methyl silicone oil / phenyl silicone oil. The polygonal box is a metal box, and the polygonal box is located at the ventilation and heat dissipation equipment.

[0011] A liquid cooling system for a large server liquid cooling pump includes coolant piping and a server liquid cooling pump; A coolant pipe is connected to the refrigerant discharge pipe that is not connected to the aforementioned connecting pipe. The coolant pipe is connected to the heat dissipation unit of the server. Then, another coolant pipe is used to connect the outlet of the heat dissipation unit to the main refrigerant inlet pipe to form a closed loop.

[0012] A working method for a large server liquid cooling pump, wherein the server is liquid cooled using the aforementioned large server liquid cooling pump, and the execution steps are as follows: S1: The pumping units around the polygonal box are alternately distributed with one main supply unit and one backup unit, and the main supply unit is used for liquid cooling. S2: The refrigerant discharge pipe of the pump unit, which is the main supply unit, is not connected to the connecting pipe. It is connected to the inlet of the server liquid cooling unit through a cold liquid pipe. The outlet of the server liquid cooling unit is connected to the main refrigerant inlet pipe through another cold liquid pipe to form a closed loop. S3: By collecting the cooling rate requirement data of each server liquid cooling unit, the power of the motor in the corresponding pumping unit is controlled to achieve the pumping speed adjustment of the pumping unit.

[0013] The present invention is further configured such that when a pump unit serving as the main supply unit malfunctions, the solenoid valve in the connecting pipe corresponding to the pump unit opens, and the motor in the pump unit serving as the main supply unit stops working. The motor in the pump unit serving as the backup unit starts working, and the liquid-cooled liquid flows from the refrigerant flow gap in the backup pump unit to the connecting pipe, then flows into the refrigerant flow gap in the main pump unit, and finally is discharged from the refrigerant discharge pipe on the main pump unit.

[0014] The present invention has the following beneficial effects: 1. This invention installs multiple pumping units within a polygonal box sidewall. The liquid cooling fluid (refrigerant) flows back from the server and converges within the polygonal box. Since each pumping unit's pump box shares the same liquid cooling fluid within the polygonal refrigerant chamber, even if one pump box malfunctions, it does not affect the operation of other pump boxes, ensuring normal liquid delivery. When a pumping unit (main supply unit) malfunctions, the motor supply can be immediately stopped, and the adjacent pumping unit (backup unit) can be started. The liquid cooling fluid flows from the connecting pipe into the refrigerant flow gap of the malfunctioning pumping unit and then exits from the refrigerant discharge pipe, achieving normal refrigerant supply. This invention ensures that a backup unit is available when any pumping unit (main supply unit) malfunctions, without affecting the operation of other pumping units (main supply units).

[0015] 2. When repairing a malfunctioning pump unit (main supply unit), this invention involves disconnecting the required coolant supply line and connecting it to the refrigerant discharge line of the pump unit (standby unit). The first solenoid valve is then opened promptly (the first solenoid valve inside the disconnected line is closed before disconnection, and is computer-controlled). This allows the pump unit (standby unit) to supply coolant. After supplying coolant, the connecting solenoid valve in the connecting pipe is closed. The malfunctioning pump unit is then disassembled. Because the motor shaft end is sealed against the sealing limit assembly, liquid will not flow backward into the multi-sided refrigerant chamber during disassembly (the one-way valve in the discharge line is equipped with...). Because the hydraulic pressure inside the multi-sided refrigerant chamber is small (affected by the pump liquid box), the motor can be repaired or replaced. After the motor is replaced / reinstalled, the connecting pipe between it and the adjacent pump liquid unit is reconnected. After all connections are made, the refrigerant is replaced through the refrigerant discharge pipe that is not connected to the connecting pipe to remove air from the refrigerant flow gap. Then, the normal connection is made. The whole process basically does not affect the liquid cooling pump's supply of liquid to the server to achieve liquid cooling, ensuring that the server can be cooled normally. This application realizes that the liquid supply does not stop during the maintenance process and can provide refrigerant for cooling large servers for a long time without interruption.

[0016] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a large server liquid cooling pump.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of a large server liquid cooling pump.

[0020] Figure 3 This is a top-down view of a large server liquid cooling pump with its multi-sided cover removed.

[0021] Figure 4 This is a schematic diagram illustrating the structure connecting the pump units under the polygonal housing to dismantle the structure.

[0022] Figure 5 This is a schematic diagram of the polygonal box structure.

[0023] Figure 6 This is a schematic diagram of the rotor.

[0024] Figure 7 This is a schematic diagram of the outer shell.

[0025] Figure 8 This is a schematic diagram of the limiting sleeve structure.

[0026] Figure 9 This is a schematic diagram of the connecting rod.

[0027] Figure 10 This is a schematic diagram of the structure of the pump unit exploding at the pump box location.

[0028] Figure 11 This is a schematic diagram of the structure of a circular box.

[0029] The attached diagram lists the components represented by each number as follows: 1. Polygonal housing; 10. Polygonal cover; 11. Refrigerant inlet main pipe; 111. Inlet branch pipe; 12. Polygonal refrigerant chamber; 13. Motor chamber; 131. Coupling rod hole; 2. Pump unit; 20. Refrigerant flow gap; 21. Rotor; 211. Cross connector rod; 22. Stator; 23. Housing; 231. Abutment groove; 232. Connecting rod hole; 233. Sealing plate; 234. Refrigerant discharge pipe; 3. Connecting pipe ; 4. Pump liquid box; 40. Discharge pipe; 41. Circular box body; 411. Impeller cavity; 412. Mounting bolt plate; 42. Closed impeller; 421. Back plate; 422. Curved impeller; 423. Height limit post; 43. Impeller sealing plate; 44. Circular cover; 5. Coupling rod; 51. Limiting ring; 52. Cross groove; 6. Limiting sleeve; 60. Extrusion sealing gasket; 61. Adhesive ring; 62. Sleeve; 63. Limiting circular hole. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-11 The present invention is a large server liquid cooling pump, including a polygonal box 1 and a pumping unit 2 installed on each side of the polygonal box 1. The side walls of the polygonal box 1 are thickened (the thickness should be sufficient to design the motor cavity, depending on the length of the motor, and should be 10-15cm longer than the length of the motor). A motor cavity 13 is provided in each side wall of the polygonal box 1. A polygonal refrigerant cavity 12 is provided inside the polygonal box 1. A refrigerant inlet main pipe 11 is provided at the bottom of the polygonal box 1. The top of the polygonal box 1 is sealed with a polygonal cap 10. The polygonal housing 1 is designed so that, after the sides are thickened, a motor cavity 13 can be cut or opened out for motor installation, and the motor cavity 13 is separated from the polygonal refrigerant cavity 12. The removable polygonal cover 10 facilitates sealing and covering the polygonal housing 1 after the pump liquid box 4 is installed.

[0032] The pumping unit 2 includes a motor, a coupling rod 5, and a pumping box 4. Each side wall of the polygonal box 1 has a coupling rod hole 131 on the wall between the motor cavity and the polygonal refrigerant cavity 12. The coupling rod 5 is inserted into the coupling rod hole 131. A sealing and limiting assembly is installed on the inner wall of the motor cavity 13, which is fitted onto the coupling rod 5. The motor shaft end is sealed against the sealing and limiting assembly. The motor shaft is connected to the coupling rod 5. The motor and the motor cavity 13 are coaxial. The outer wall of the motor is aligned with the motor cavity 13. A refrigerant flow gap 20 is left between the inner walls. A sealing plate 233 is provided at the tail end of the motor. The sealing plate 233 seals the opening of the motor cavity 13. Multiple refrigerant discharge pipes 234 are provided on the sealing plate 233. A pump liquid box 4 is correspondingly arranged on each inner wall of the polygonal refrigerant cavity 12. The inlet of the pump liquid box 4 is connected to the inside of the polygonal refrigerant cavity 12. Multiple outlet pipes 40 are provided on the side wall of the pump liquid box 4. The outlet pipes 40 penetrate the side wall of the polygonal box 1 and are inserted into the refrigerant flow gap 20. After the polygonal housing 1 is machined, the motor is first installed in each motor cavity 13. The coupling rod 5 is inserted into the coupling rod hole 131, the sealing and limiting component is fitted onto the coupling rod 5, and the sealing and limiting component is fixed to the inner wall of the motor cavity 13. The front end of the assembled motor is then placed against the sealing and limiting component (the position is adjusted by rotation) to achieve the connection between the front end shaft of the motor and the coupling rod 5. At this time, the sealing plate 233 seals the opening of the motor cavity 13. The sealing plate 233 is screwed onto the outer wall of the polygonal housing 1 with bolts to seal and install with the outer wall. At this time, the front end of the motor is tightly pressed against the sealing and limiting component to achieve a sealed connection. After all the motors are installed, the pump liquid box 4 is installed. The pump liquid box 4 is installed on the inner wall of the polygonal refrigerant cavity 12 and connected to the coupling rod 5 so that the motor rotation drives the blades inside the pump liquid box 4 to rotate.

[0033] After all the above processes are completed, first fill the multi-sided refrigerant chamber 12 with refrigerant (liquid cooling liquid), then cover the multi-sided cover 10 and fix it with bolts (a sealing ring is designed at the position of the cover).

[0034] After the refrigerant chamber 12 is filled with liquid, liquid is injected into the refrigerant flow gap 20. Liquid is discharged from one refrigerant discharge pipe 234 and gas is discharged from another refrigerant discharge pipe 234 until the other refrigerant discharge pipe 234 is filled with liquid (the top pipe is preferred for the other refrigerant discharge pipe 234). Then, the liquid injection is stopped, the valve is closed, and then the piping connection with the server is made (the refrigerant piping is connected to the server's heat dissipation unit).

[0035] Two adjacent refrigerant discharge pipes 234 on adjacent sealing plates 233 are connected by a connecting pipe 3, and a connecting solenoid valve is provided in the connecting pipe 3.

[0036] When a pump unit 2 malfunctions, stop the operation of the malfunctioning pump unit 2, promptly open the connecting solenoid valve, and start the operation of the adjacent pump unit 2 to replenish the liquid supply.

[0037] The polygonal box 1 has at least 8 side walls and the number of side walls is an even number. The pumping unit 2 is arranged with one main supply unit and one standby unit alternately. Each of the pumping units 2 operates independently. When the main supply unit experiences an abnormality in its liquid supply, the pumping function of that main supply unit is stopped, the adjacent standby unit is started, and the connecting solenoid valve in the connecting pipe 3 between the abnormal main supply unit and the standby unit is opened.

[0038] The number of sidewalls of the polygonal box 1 can be selected as 8, 10, 12 or 16. If the number is too large, an additional set of liquid cooling pumps can be added. Choosing an even number means that each main power supply unit has a spare unit to match it.

[0039] The sealing plate 233 has at least four refrigerant discharge pipes 234, which are evenly distributed in a ring. Each refrigerant discharge pipe 234 not connected to the connecting pipe 3 is equipped with a first solenoid valve. The refrigerant inlet main pipe 11 is equipped with multiple inlet branch pipes 111, and each inlet branch pipe 111 is equipped with a second solenoid valve. The outlet pipe 40 is equipped with a one-way valve at the outlet end, and the one-way valve opens in one direction toward the refrigerant flow gap 20.

[0040] The sealing plate 233 is integrated with the tail end of the motor housing 23. The motor housing is waterproof. After the sealing plate 233 is pressed against the side wall of the polygonal box 1, it is sealed and fitted with the side wall (with a rubber ring gasket at the fitting position). The liquid flows within the refrigerant flow gap 20, which not only dissipates heat from the motor but also ensures the flow of liquid. The heat dissipation of the motor is relatively small compared to that of the server. Therefore, the heat dissipation of the motor is incidental. All the heat generated by the motor will be carried away in time, and the refrigerant temperature will not rise significantly.

[0041] The refrigerant flowing out of the server is first cooled down, and then flows from the inlet branch pipe 111 into the refrigerant inlet main pipe 11 and enters the polygonal refrigerant chamber 12. Since the pumping capacity of each pump box 4 is determined by the motor power, when the liquid thrown out of the pump box 4 is discharged from multiple outlet pipes 40, it flows into the refrigerant flow gap 20 and is then discharged from the refrigerant discharge pipe 234 to form a liquid-cooled liquid circulation flow.

[0042] The motor includes a housing 23, a stator 22, a rotor 21, and a rear end cover. The stator 22 is attached to the inner wall of the housing 23. The front end of the housing 23 is provided with an abutting groove 231. The center of the front end of the housing 23 is provided with a plug-in rod hole 232. The shaft end of the rotor 21 is provided with a cross plug-in rod 211. The cross plug-in rod 211 is inserted into the plug-in rod hole 232. The abutting groove 231 abuts against the sealing and limiting assembly. The rear end cover is screwed onto the opening at the rear end of the housing 23. The rear end wall of the outer shell 23 is provided with an outwardly extending sealing plate 233, and a sealing gasket is provided between the sealing plate 233 and the outer wall of the polygonal box 1.

[0043] The outer casing 23 is structurally improved so that it can be fastened to the sealing and limiting component via the abutment groove 231 to complete the docking and sealing. Liquid will not enter the outer casing 23 from the docking position. When docking is completed, a downward thrust is applied so that the sealing plate 233 is pressed tightly against the side wall of the polygonal box 1 to achieve the effect of sealing the cavity opening of the motor cavity 13. Liquid can only flow within the refrigerant flow gap 20 and is discharged from the refrigerant discharge pipe 234. Because the outer casing is surrounded by liquid, the heat of the motor is quickly absorbed, and the motor temperature remains stable with small temperature fluctuations.

[0044] The sealing and limiting assembly includes a limiting sleeve 6 and a compression sealing gasket 60. The limiting sleeve 6 includes a retaining ring 61 and a sleeve 62. The sleeve 62 is integrally connected to the upper surface of the retaining ring 61. A limiting circular hole 63 is provided at the center of the retaining ring 61. The inner diameter of the limiting circular hole 63 is larger than the inner diameter of the sleeve 62. A limiting ring 51 is provided near the tail end of the connecting rod 5. A cross groove 52 matching the end of the cross-shaped insertion rod 211 is provided on the tail end of the connecting rod 5. The limiting ring 51 is matched and locked in the limiting circular hole 63. The tail end of the connecting rod 5 is inserted into the sleeve 62. The retaining ring 61 is attached to the inner wall of the motor cavity 13 and fixed with bolts. The compression sealing gasket 60 is sleeved on the outside of the sleeve 62 and attached to the retaining ring 61. like Figure 8The limiting sleeve 6 structure can be fastened to the tail end of the connecting rod 5 and wrap around the limiting ring 51, so that the connecting rod 5 cannot be pulled out, but can only be limited to rotation. The sealing ring 61 is tightly attached to the inner wall of the motor cavity 13 by bolts. After the compression sealing gasket 60 is put on the outside of the sleeve 62, the sealing gasket 60 is compressed by the abutting groove 231.

[0045] The abutting groove 231 engages with the compression sealing gasket 60 and compresses the gasket 60 to achieve a sealing connection. Liquid will not flow from the compression sealing gasket 60, ensuring the sealing of the front end of the outer casing 23. Since the coupling rod 5 is mechanically sealed within the coupling rod hole 131, the gaps between them are extremely small. The heat transfer oil (refrigerant) has a relatively large molecular weight and will not flow through the gaps, while the coupling rod 5 can still rotate.

[0046] After the cross-shaped connector 211 at the tail end of the connecting rod 5 is connected to the cross groove 52, it can be connected and rotated. Disassembly is also convenient; it can be pulled outwards directly. When connecting, it can be directly inserted into the cross groove 52 by rotation.

[0047] The pump liquid box 4 includes a circular box body 41, a circular cover 44, and a centrifugal impeller assembly. The bottom of the circular box body 41 is provided with a shaft hole. The inside of the circular box body 41 is an impeller cavity 411. Multiple mounting bolt plates 412 are provided around the outer wall of the circular box body 41. The liquid outlet pipe 40 is connected to the side wall of the circular box body 41. The circular box body 41 is attached to the inner wall of the polygonal box body 1 and the mounting bolt plates 412 are fixed to the inner wall with bolts. The connecting rod 5 passes through the shaft hole and extends into the interior of the circular box body 41. like Figure 10 The pump liquid box 4 is conventional, but its structure, size and the design of the liquid outlet pipe 40 are different from existing technologies. The liquid outlet pipe 40 is designed to be connected to the refrigerant flow gap 20 to form an external liquid transport.

[0048] The centrifugal impeller assembly includes a closed impeller 42 and an impeller sealing plate 43. The closed impeller 42 includes a back plate 421 and multiple curved impellers 422. The curved impellers 422 are evenly welded on the back plate 421. The center of the back plate 421 is bolted to the end of the connecting rod 5. The back plate 421 has multiple height limiting posts 423 around its edge. The impeller sealing plate 43 is attached to the multiple height limiting posts 423 and fixed with bolts. The center of the impeller sealing plate 43 has a first liquid inlet hole. The center of the circular cover 44 has a second liquid inlet hole. The circular cover 44 seals the circular box 41.

[0049] After the closed impeller 42 and impeller sealing plate 43 are assembled, when rotating, they will draw liquid from the first liquid inlet hole, and the liquid will be drawn in from the second liquid inlet hole and thrown outward by the curved impeller 422, forming a liquid pump effect. The liquid is thrown to the inner wall of the impeller cavity 411 of the circular box 41 and discharged from the liquid outlet pipe 40, completing the liquid flow.

[0050] The second solenoid valve in each of the liquid inlet branch pipes 111 is an oil pressure sensing solenoid valve, and the heat transfer oil filled in the polygonal housing 1 of the liquid cooling pump is high viscosity methyl silicone oil / phenyl silicone oil. The polygonal box 1 is a metal box, and the polygonal box 1 is installed at the ventilation and heat dissipation equipment.

[0051] The polygonal housing 1 needs to be positioned where airflow is possible, such as where a fan is installed. A metal housing also facilitates heat dissipation. High-viscosity methyl silicone oil / phenyl silicone oil can be used as a refrigerant, or other refrigerants can be used, provided there is no leakage at the coupling rod 5. The oil pressure sensing solenoid valve can sense the pressure of each flowing liquid within the pipe to determine if the liquid returning to the server cooling unit is flowing normally, thus judging whether the refrigerant liquid used for cooling is flowing properly.

[0052] A liquid cooling system for a large server liquid cooling pump includes coolant piping and a server liquid cooling pump; A coolant pipe is connected to the refrigerant discharge pipe 234, which is not connected to the connecting pipe 3. The coolant pipe is connected to the heat dissipation unit of the server. Then, the outlet of the heat dissipation unit is connected to the main refrigerant inlet pipe to form a closed loop.

[0053] Coolant piping typically consists of metal heat-conducting pipes (some sections require flexible hoses for connection), primarily used to transport the refrigerant liquid. Heat dissipation units mainly consist of components such as liquid coolers, which absorb and dissipate heat during cooling.

[0054] A working method for a large server liquid cooling pump, wherein the server is liquid cooled using the aforementioned large server liquid cooling pump, and the execution steps are as follows: S1: The pumping units 2 around the polygonal box 1 are arranged alternately with one main supply unit and one standby unit, and the main supply unit is used for liquid cooling. S2: The refrigerant discharge pipe 234 of the pump unit 2, which is the main supply unit and is not connected to the connecting pipe 3, is connected to the inlet of the server liquid cooling unit through a cold liquid pipeline. The outlet of the server liquid cooling unit is connected to the refrigerant inlet main pipe 11 through another cold liquid pipeline to form a closed loop. S3: By collecting the cooling rate requirement data of each server liquid cooling unit, the power of the motor in the corresponding pumping unit 2 is controlled to adjust the pumping speed of the pumping unit 2.

[0055] During normal operation, the main supply unit supplies refrigerant normally. However, if the motor malfunctions or the corresponding return liquid pressure becomes abnormal (the oil pressure sensing solenoid valve in the inlet branch pipe 111 detects abnormal oil pressure and stops supplying refrigerant without switching to the backup unit), in the case of a motor malfunction, the running motor needs to be stopped, and the motor in the backup unit needs to be started immediately. The connecting solenoid valve in the connecting pipe 3 is then opened, allowing refrigerant to be pumped from the backup unit's refrigerant flow gap 20 into the main supply unit's refrigerant flow gap 20, thus providing backup refrigerant supply. The pumping speed of each pumping unit 2 is independently adjustable, allowing each pumping unit 2 to provide the required refrigerant flow rate / velocity to achieve the cooling effect. The intelligent control server has different heat dissipation requirements for each heat dissipation location.

[0056] When a pump unit 2, which serves as the main supply unit, malfunctions, the solenoid valve in the connecting pipe 3 connected to that pump unit 2 opens, stopping the motor in the main supply unit 2. The motor in the backup pump unit 2 then starts working, and the liquid coolant flows from the refrigerant flow gap 20 in the backup pump unit 2 to the connecting pipe 3, then flows back into the refrigerant flow gap 20 in the main supply unit 2, and finally exits from the refrigerant discharge pipe 234 on the main supply unit 2.

[0057] When an anomaly occurs, the system will automatically detect and replace the refrigerant supply. Liquid will be replenished from the adjacent backup unit and enter the faulty main supply unit (because the refrigerant piping connection is still on the main supply unit). Only during subsequent maintenance will it be temporarily connected to the refrigerant discharge pipe 234 of the backup unit, and then reconnected to the original main unit's refrigerant discharge pipe 234 after maintenance is completed. During maintenance or repair, the refrigerant supply and cooling can be performed on each pump unit without interrupting the cooling process. This allows for uninterrupted refrigerant supply and cooling for extended periods (up to decades), requiring only an uninterrupted power supply.

[0058] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A large server liquid cooling pump, characterized in that: It includes a polygonal box (1) and a pump unit (2) installed on each side of the polygonal box (1). A motor cavity (13) is provided in each side wall of the polygonal box (1), a polygonal refrigerant cavity (12) is provided inside the polygonal box (1), a refrigerant inlet manifold (11) is provided at the bottom of the polygonal box (1), and the top of the polygonal box (1) is sealed with a polygonal cap (10). The pump unit (2) includes a motor, a coupling rod (5), and a pump box (4). Each side wall of the polygonal box (1) has a coupling rod hole (131) on the wall between the motor cavity and the polygonal refrigerant cavity (12). The coupling rod (5) is inserted into the coupling rod hole (131). A sealing and limiting component is installed on the inner wall of the motor cavity (13) and fitted onto the coupling rod (5). The motor shaft end is sealed against the sealing and limiting component. The motor shaft is connected to the coupling rod (5). The motor and the motor cavity (13) are coaxial. The outer wall of the motor is aligned with the inner wall of the motor cavity (13). A refrigerant flow gap (20) is left between them. A sealing plate (233) is provided at the tail end of the motor. The sealing plate (233) seals the opening of the motor cavity (13). Multiple refrigerant discharge pipes (234) are provided on the sealing plate (233). A pump liquid box (4) is correspondingly arranged on each inner wall of the polygonal refrigerant cavity (12). The inlet of the pump liquid box (4) is connected to the inside of the polygonal refrigerant cavity (12). Multiple outlet pipes (40) are provided on the side wall of the pump liquid box (4). The outlet pipes (40) penetrate the side wall of the polygonal box body (1) and are inserted into the refrigerant flow gap (20). Two adjacent refrigerant discharge pipes (234) on the adjacent sealing plate (233) are connected by a connecting pipe (3), and a connecting solenoid valve is provided in the connecting pipe (3).

2. A large server liquid cooling pump according to claim 1, characterized in that, The polygonal box (1) has at least 8 side walls and the number of side walls is an even number. The pump unit (2) is arranged with one main supply unit and one backup unit alternately. Each of the pumping units (2) operates independently. When the main supply unit is abnormal, the pumping function of the main supply unit is stopped, the standby unit adjacent to the main supply unit is started, and the solenoid valve in the connecting pipe (3) between the abnormal main supply unit and the standby unit is opened.

3. A large server liquid cooling pump according to claim 2, characterized in that, The sealing plate (233) has at least four refrigerant discharge pipes (234) arranged in a ring. Each refrigerant discharge pipe (234) not connected to the connecting pipe (3) is equipped with a first solenoid valve. The refrigerant inlet main pipe (11) is equipped with multiple inlet branch pipes (111). Each inlet branch pipe (111) is equipped with a second solenoid valve. The outlet pipe (40) is equipped with a one-way valve at the outlet end. The one-way valve opens in one direction toward the refrigerant flow gap (20).

4. A large server liquid cooling pump according to claim 1, characterized in that, The motor includes a housing (23), a stator (22), a rotor (21), and a rear end cover. The stator (22) is attached to the inner wall of the housing (23). The front end of the housing (23) is provided with an abutting groove (231). The center of the front end of the housing (23) is provided with a plug-in rod hole (232). The shaft end of the rotor (21) is provided with a cross plug-in rod (211). The cross plug-in rod (211) is inserted into the plug-in rod hole (232). The abutting groove (231) abuts against the sealing and limiting assembly. The rear end cover is screwed onto the opening at the rear end of the housing (23). The outer shell (23) has an outwardly extending sealing plate (233) around its rear end wall, and a sealing gasket is provided between the sealing plate (233) and the outer wall of the polygonal box (1).

5. A large server liquid cooling pump according to claim 4, characterized in that, The sealing and limiting assembly includes a limiting sleeve (6) and a compression sealing gasket (60). The limiting sleeve (6) includes a retaining ring (61) and a sleeve (62). The upper surface of the retaining ring (61) is connected to an integral sleeve (62). A limiting circular hole (63) is provided at the center of the retaining ring (61). The inner diameter of the limiting circular hole (63) is larger than the inner diameter of the sleeve (62). The connecting rod (5) has a limiting ring (5) near its tail end. 1) The tail end of the connecting rod (5) is provided with a cross groove (52) that matches the end of the cross plug rod (211). The limiting ring (51) is matched and stuck in the limiting round hole (63). The tail end of the connecting rod (5) is inserted into the sleeve (62). The adhesive ring (61) is attached to the inner wall of the motor cavity (13) and fixed with bolts. The extrusion sealing pad (60) is sleeved on the outside of the sleeve (62) and attached to the adhesive ring (61). The abutting groove (231) is fastened onto the compression sealing gasket (60) and the compression sealing gasket (60) is squeezed to achieve a butt seal.

6. A large server liquid cooling pump according to claim 1, characterized in that, The pump liquid box (4) includes a circular box body (41), a circular cover (44) and a centrifugal impeller assembly. The bottom of the circular box body (41) is provided with a shaft hole. The inside of the circular box body (41) is an impeller cavity (411). Multiple mounting bolt plates (412) are provided around the outer wall of the circular box body (41). The liquid outlet pipe (40) is connected to the side wall of the circular box body (41). The circular box body (41) is attached to the inner wall of the polygonal box body (1) and the mounting bolt plates (412) are fixed to the inner wall with bolts. The connecting rod (5) passes through the shaft hole and extends into the inside of the circular box body (41). The centrifugal impeller assembly includes a closed impeller (42) and an impeller sealing plate (43). The closed impeller (42) includes a back plate (421) and multiple curved impellers (422). The curved impellers (422) are evenly welded on the back plate (421). The center of the back plate (421) is bolted to the end of the connecting rod (5). The back plate (421) has multiple height-limiting columns (423) around its edge. The impeller sealing plate (43) is attached to the multiple height-limiting columns (423) and fixed with bolts. The center of the impeller sealing plate (43) has a first liquid inlet hole. The center of the circular cover (44) has a second liquid inlet hole. The circular cover (44) seals the circular box (41).

7. A large server liquid cooling pump according to claim 3, characterized in that, The second solenoid valve in each of the liquid inlet branch pipes (111) is an oil pressure sensing solenoid valve, and the heat transfer oil filled in the polygonal box (1) of the liquid cooling pump is high viscosity methyl silicone oil / phenyl silicone oil. The polygonal box (1) is a metal box, and the polygonal box (1) is located at the ventilation and heat dissipation equipment.

8. A liquid cooling system for a large server liquid cooling pump, characterized in that, Includes coolant piping and the server liquid cooling pump as described in any one of claims 1-7; A coolant pipe is connected to the refrigerant discharge pipe (234) that is not connected to the connecting pipe (3). The coolant pipe is connected to the heat dissipation unit of the server. Then, the outlet of the heat dissipation unit is connected to the main refrigerant inlet pipe to form a closed loop.

9. A working method of a large server liquid cooling pump, characterized in that, The server is liquid-cooled using the large server liquid cooling pump described in any one of claims 1-7, and the steps are as follows: S1: The pumping units (2) around the polygonal box (1) are arranged alternately with one main supply unit and one backup unit, and the main supply unit is used for liquid cooling. S2: The refrigerant discharge pipe (234) of the pump unit (2), which is the main supply unit, is not connected to the connecting pipe (3) and is connected to the inlet of the server liquid cooling unit by a cold liquid pipeline. The outlet of the server liquid cooling unit is connected to the main refrigerant inlet pipe (11) through another cold liquid pipeline to form a closed loop. S3: By collecting the cooling speed requirement data of each server liquid cooling unit, the motor power in the corresponding pumping unit (2) is controlled to achieve the pumping speed adjustment of the pumping unit (2).

10. The working method of a large server liquid cooling pump according to claim 9, characterized in that, When a pump unit (2) that serves as the main supply unit malfunctions, the solenoid valve in the connecting pipe (3) connected to the pump unit (2) opens and stops the motor in the pump unit (2) that serves as the main supply unit. The motor in the pump unit (2) that serves as the backup unit starts to work. The liquid coolant flows from the refrigerant flow gap (20) in the pump unit (2) that serves as the backup unit to the connecting pipe (3), then flows into the refrigerant flow gap (20) in the pump unit (2) that serves as the main supply unit, and finally is discharged from the refrigerant discharge pipe (234) on the pump unit (2) that serves as the main supply unit.

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