High-speed motorized spindle liquid cooling device for optical curve grinding machine

Abstract

The utility model discloses a high-speed motorized spindle liquid cooling device for an optical curve grinding machine, which relates to the technical field of grinding machine spindles and comprises a shell base, an output shaft is rotatably arranged in the shell base, a rotor coil is connected outside the output shaft, and a stator coil is arranged outside the rotor coil. The end part of the shell base is connected with a liquid-cooled shell, the inner surface is coated with a heat-conducting coating, and the stator coil is mounted in the heat-conducting coating and is in contact with the coating. And the other end of the liquid-cooled shell is blocked by an end cover and is provided with a sealing rubber ring, so that the leakage of cooling liquid is prevented. A liquid cooling cavity is reserved inside and is communicated with an external liquid supply and return pipe through a liquid inlet connector and a liquid outlet connector, and it is ensured that cooling liquid circularly flows to take away heat. And the shaft barrel and the end cover are jointly provided with a lead channel, so that an electrifying lead extends to the electrifying end of the stator coil. Through cooperation of liquid cooling circulation and the heat conduction coating, efficient heat dissipation is achieved, stable operation of the spindle is guaranteed, and the machining precision and efficiency of the grinding machine are improved.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine spindle technology, specifically to a high-speed electric spindle liquid cooling device for an optical profile grinding machine. Background Technology

[0002] High-speed rotating grinding machine spindles typically contain rotor and stator coils. When the stator coil is energized, it causes the rotor coil to drive the spindle to rotate at high speed, which in turn drives the grinding tool to machine the workpiece. However, during this process, due to the thermal effect of the current and friction between components, the rotor and stator coils generate a large amount of heat. If this heat cannot be dissipated effectively and in a timely manner, the temperature of the spindle components will rise sharply.

[0003] Excessive temperature can have numerous adverse effects on the spindle. Firstly, high temperatures can alter the properties of the spindle material, such as reducing its strength and hardness and increasing its coefficient of thermal expansion, leading to increased spindle deformation and wear, and ultimately reducing its lifespan. Secondly, elevated temperatures can affect the spindle's rotational accuracy and stability, causing deviations in the tool's cutting position, which in turn affects the workpiece's machining accuracy and surface quality. Furthermore, for some temperature-sensitive machining processes, such as precision grinding, elevated spindle temperature can lead to thermal deformation and other problems during machining, failing to meet processing requirements.

[0004] To address the heat dissipation problem of high-speed grinding machine spindles, traditional cooling methods primarily employ air cooling. Air cooling uses fans and other devices to circulate air and remove heat from the spindle surface. However, with the continuous increase in spindle speed, air cooling is no longer sufficient to meet the cooling demands. Air cooling efficiency is relatively low, especially when the spindle rotates at high speeds, as airflow is somewhat restricted, making it difficult to dissipate the heat generated inside the spindle in a timely manner. Furthermore, air cooling is easily affected by factors such as ambient temperature and dust; in high-temperature, dusty environments, the effectiveness of air cooling is significantly reduced. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a high-speed electric spindle liquid cooling device for optical profile grinding machines, which solves the problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-speed electric spindle liquid cooling device for an optical profile grinding machine, comprising:

[0007] The housing base has an output shaft rotatably mounted inside it;

[0008] The rotor coil is connected to the outside of the output shaft;

[0009] Stator coils are located outside the rotor coils;

[0010] The liquid-cooled housing is connected to the end of the housing base, and its inner surface is coated with a thermally conductive coating. The stator coil is installed inside the liquid-cooled housing and is in contact with the thermally conductive coating.

[0011] The liquid-cooled housing contains circulating coolant to remove the heat generated by the rotor and stator coils during operation.

[0012] Furthermore, the liquid cooling housing is configured with one end closed and the other end open. The open end is sealed by an end cap installed on the liquid cooling housing, and a sealing ring is provided at the sealed end to prevent coolant leakage.

[0013] Furthermore, the end cap has a threaded hole pre-drilled inside, and a temperature sensor is installed inside the threaded hole. A shaft is also installed inside the liquid cooling shell. The outer surface of the shaft is bonded to the thermally conductive coating. A sensor channel is drilled through the inside of the shaft. The detection end of the temperature sensor extends through the sensor channel to the cavity where the rotor coil and stator coil are located, for detecting the temperature of the cavity.

[0014] Furthermore, the end cap and the shaft cylinder are provided with lead wire channels, allowing the energized wires to extend into the cavities containing the rotor coil and stator coil, and connect to the energized terminals of the stator coil.

[0015] Furthermore, the housing base is rotatably connected to the output shaft via a front bearing, and the output shaft is rotatably connected to the shaft cylinder via a rear bearing. The liquid-cooled housing can also remove the heat generated by the high-speed rotation of the rear bearing.

[0016] Furthermore, a liquid cooling cavity is pre-drilled inside the liquid cooling shell, and an inlet connector and an outlet connector are respectively connected to the upper part of the liquid cooling shell. The liquid cooling cavity is connected to the inlet connector and the outlet connector, and the inlet connector and the outlet connector are respectively connected to the external liquid supply pipe and the return pipe to ensure the circulation of coolant.

[0017] This invention provides a high-speed electric spindle liquid cooling device for an optical profile grinding machine. Compared with the prior art, it has the following advantages:

[0018] 1. The high-speed spindle liquid cooling system of this grinding machine achieves efficient heat dissipation from the spindle's interior through its liquid cooling shell. The liquid cooling cavity inside the shell is connected to the inlet and outlet connectors, forming a complete coolant circulation path in conjunction with external supply and return pipes. During spindle operation, the rotor and stator coils generate a large amount of heat due to current heating and component friction, which is rapidly conducted to the liquid cooling shell. The circulating coolant continuously absorbs heat and heats up, then flows out through the outlet connector, is cooled by external cooling equipment, and then flows back into the liquid cooling cavity through the inlet connector, repeating this cycle continuously to remove heat. This efficient liquid cooling circulation method ensures that the temperature of each component remains within a reasonable range during high-speed spindle operation, effectively preventing problems such as spindle performance degradation, deformation, or even damage caused by overheating. This ensures stable spindle operation and improves the grinding machine's machining accuracy and reliability.

[0019] 2. The high-speed spindle liquid cooling system of this grinding machine, through its liquid cooling shell, ensures that the coolant is evenly distributed throughout the shell, thereby achieving uniform heat dissipation from the spindle. Compared to traditional air cooling, which often suffers from uneven heat dissipation, leading to localized overheating of the spindle and generating thermal stress, thus affecting its service life, this system's liquid cooling circulation avoids this problem. It ensures a more uniform temperature distribution throughout the spindle, reduces localized thermal stress, minimizes spindle material fatigue and damage caused by thermal stress, and further improves the spindle's durability.

[0020] 3. The high-speed spindle liquid cooling system of this grinding machine features a liquid cooling shell with a thermally conductive coating on its inner surface, providing excellent thermal conductivity. The stator coils are installed inside the liquid cooling shell, in close contact with the thermally conductive coating. When the heat generated by the stator coils during operation is conducted to the liquid cooling shell, the thermally conductive coating rapidly transfers this heat to the coolant, significantly shortening the heat transfer time and improving its efficiency. Compared to traditional heat dissipation methods, the presence of the thermally conductive coating allows heat to be transferred from the heat source to the coolant much faster, thereby accelerating heat dissipation and effectively reducing the spindle's operating temperature. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the liquid-cooled outer shell in this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the end cap and shaft cylinder of this utility model;

[0024] Figure 4This is a schematic diagram of the assembly structure of this utility model;

[0025] Figure 5 This is a half-sectional view of the assembled version of this utility model.

[0026] In the diagram: 1. Housing base; 2. Output shaft; 3. Rotor coil; 4. Liquid-cooled housing; 41. Liquid-cooled cavity; 42. Liquid inlet connector; 43. Liquid outlet connector; 5. Stator coil; 6. Thermally conductive coating; 7. End cap; 71. Threaded hole; 72. Lead wire channel; 8. Temperature sensor; 9. Front bearing; 10. Shaft cylinder; 101. Sensor channel; 11. Rear bearing. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-5 This utility model provides a technical solution: a high-speed electric spindle liquid cooling device for an optical profile grinding machine, mainly composed of a housing base 1, an output shaft 2, a rotor coil 3, a stator coil 5, a liquid cooling shell 4, a thermally conductive coating 6, an end cover 7, a temperature sensor 8, a front bearing 9, a shaft sleeve 10, a rear bearing 11, a liquid inlet connector 42, and a liquid outlet connector 43. All components work together to achieve effective heat dissipation during the operation of the high-speed grinding machine spindle, ensuring stable spindle operation.

[0029] The housing base 1 serves as the supporting foundation for the entire device, and the output shaft 2 is rotatably mounted inside it. The housing base 1 and the output shaft 2 are rotatably connected by a front bearing 9. The front bearing 9 can ensure that the output shaft 2 rotates smoothly and steadily within the housing base 1, reducing frictional resistance and energy loss.

[0030] The output shaft 2 is externally connected to a rotor coil 3, and a stator coil 5 is externally mounted on the rotor coil 3. When the stator coil 5 is energized, according to the principle of electromagnetic induction (currently known technology), the magnetic field generated by the stator coil 5 will cause the rotor coil 3 to drive the output shaft 2 to rotate at high speed. The drive end of the output shaft 2 is used to mount the grinding machine's cutting tool, thereby driving the tool to process the workpiece.

[0031] The end of the housing base 1 is connected to the liquid-cooled housing 4, which is configured with one end closed and the other end open. The open end is sealed by an end cap 7 installed on the liquid-cooled housing 4, and a sealing ring is provided at the sealing point. This sealing ring can effectively prevent the coolant inside the liquid-cooled housing 4 from leaking out, ensuring that the circulation of coolant takes place in a closed environment.

[0032] The inner surface of the liquid-cooled housing 4 is coated with a thermally conductive coating 6, which is made of graphene or silicon carbide and has good thermal conductivity. The stator coil 5 is installed inside the liquid-cooled housing 4, and the liquid-cooled housing 4 is in contact with the thermally conductive coating 6. This structural design allows the heat generated by the stator coil 5 during operation to be quickly transferred to the liquid-cooled housing 4 through the thermally conductive coating 6.

[0033] Inside the liquid-cooled housing 4, a shaft sleeve 10 is also installed, with its outer surface bonded to the thermally conductive coating 6. A sensor channel 101 is formed through the inside of the shaft sleeve 10, providing a channel for the detection end of the temperature sensor 8. At the same time, a lead wire channel 72 is formed together inside the end cover 7 and the shaft sleeve 10, allowing the energized wire to extend into the cavity containing the rotor coil 3 and the stator coil 5, and connect to the energized end of the stator coil 5, ensuring the normal energization of the stator coil 5.

[0034] The output shaft 2 is rotatably connected to the shaft cylinder 10 through the rear bearing 11. The liquid cooling shell 4 can not only remove the heat generated when the rotor coil 3 and stator coil 5 are working, but also remove the heat generated by the high-speed rotation of the rear bearing 11, effectively reducing the working temperature of each component of the spindle.

[0035] A threaded hole 71 is pre-drilled inside the end cover 7, and a temperature sensor 8 is installed inside the threaded hole 71. The detection end of the temperature sensor 8 extends through the sensor channel 101 to the cavity where the rotor coil 3 and stator coil 5 are located, enabling real-time detection of the cavity temperature. The detected temperature data is transmitted to a terminal device via a communication cable, allowing operators to view the real-time temperature changes inside the spindle and adjust the coolant flow rate or other operating parameters in a timely manner to ensure the normal operation of the spindle (existing known technology).

[0036] The liquid-cooled housing 4 has a pre-drilled liquid-cooled cavity 41. The upper part of the liquid-cooled housing 4 is connected to the liquid inlet connector 42 and the liquid outlet connector 43. The liquid-cooled cavity 41 is connected to the liquid inlet connector 42 and the liquid outlet connector 43. The liquid inlet connector 42 and the liquid outlet connector 43 are respectively connected to the external liquid supply pipe and the liquid return pipe (not shown in the figure). Through external circulation pumps and other equipment (existing known technology), the coolant can be ensured to circulate in the liquid-cooled cavity 41. During the flow, the coolant continuously absorbs the heat generated by the rotor coil 3, the stator coil 5 and the rear bearing 11. After heating up, it flows out through the liquid outlet connector 43, and after being cooled by the cooling equipment, it flows back into the liquid-cooled cavity 41 through the liquid inlet connector 42, thus continuously removing heat.

[0037] When the grinding machine is working, the grinding tool is first installed on the drive end of the output shaft 2 (the installation structure of the tool inside the output shaft 2 adopts existing technology and will not be described in detail here). Then, the stator coil 5 is energized, and the magnetic field generated by the stator coil 5 causes the rotor coil 3 to drive the output shaft 2 to rotate at high speed, which in turn drives the tool to process the workpiece.

[0038] Because the rotor coil 3 and stator coil 5 generate a large amount of heat during operation, circulating coolant is introduced into the liquid-cooled cavity 41. Through heat conduction, the heat generated by the rotor coil 3 and stator coil 5 is transferred to the thermally conductive coating 6 on the inner surface of the liquid-cooled housing 4. The thermally conductive coating 6 quickly transfers the heat to the coolant, causing the coolant to heat up and thus rapidly dissipating the heat. Simultaneously, the heat generated by the high-speed rotation of the rear bearing 11 is also carried away by the coolant in the liquid-cooled housing 4.

[0039] Temperature sensor 8 monitors the temperature of the cavity containing rotor coil 3 and stator coil 5 in real time and transmits the temperature data to the terminal equipment. Based on the temperature information displayed on the terminal equipment, operators can adjust the coolant flow rate or take other measures to ensure the spindle's operating temperature remains within the normal range, thus guaranteeing the grinding machine's machining accuracy and stability.

Claims

1. A high-speed electric spindle liquid cooling device for an optical profile grinding machine, comprising: The housing base (1) has an output shaft (2) rotatably mounted inside it; The rotor coil (3) is connected to the outside of the output shaft (2); The stator coil (5) is located outside the rotor coil (3); Its characteristic is that it further includes: The liquid-cooled housing (4) is connected to the end of the housing base (1), and its inner surface is coated with a thermally conductive coating (6). The stator coil (5) is installed inside the liquid-cooled housing (4) and is in contact with the thermally conductive coating (6). The liquid-cooled housing (4) contains circulating coolant to remove the heat generated by the rotor coil (3) and stator coil (5) during operation.

2. The high-speed electric spindle liquid cooling device for an optical profile grinding machine according to claim 1, characterized in that, The liquid cooling housing (4) is configured with one end closed and the other end open. The open end is sealed by an end cap (7) installed on the liquid cooling housing (4), and a sealing ring is provided at the sealed end to prevent coolant leakage.

3. The high-speed electric spindle liquid cooling device for an optical profile grinding machine according to claim 2, characterized in that, The end cap (7) has a threaded hole (71) pre-drilled inside. A temperature sensor (8) is installed inside the threaded hole (71). A shaft cylinder (10) is also installed inside the liquid-cooled shell (4). The outer surface of the shaft cylinder (10) is in contact with the thermally conductive coating (6). A sensor channel (101) is opened through the inside of the shaft cylinder (10). The detection end of the temperature sensor (8) extends through the sensor channel (101) to the inside of the cavity where the rotor coil (3) and stator coil (5) are located, and is used to detect the temperature of the cavity.

4. The high-speed electric spindle liquid cooling device for an optical profile grinding machine according to claim 3, characterized in that, The end cap (7) and the shaft cylinder (10) have a common lead wire channel (72) inside, so that the energized wire can extend into the cavity where the rotor coil (3) and stator coil (5) are located, and connect to the energized end of the stator coil (5).

5. A high-speed electric spindle liquid cooling device for an optical profile grinding machine according to claim 1, characterized in that, The housing base (1) is rotatably connected to the output shaft (2) via the front bearing (9), and the output shaft (2) is rotatably connected to the shaft cylinder (10) via the rear bearing (11). The liquid-cooled housing (4) can also remove the heat generated by the high-speed rotation of the rear bearing (11).

6. A high-speed electric spindle liquid cooling device for an optical profile grinding machine according to claim 1, characterized in that, The liquid-cooled outer shell (4) has a pre-reserved liquid-cooled cavity (41) inside. The upper part of the liquid-cooled outer shell (4) is connected to a liquid inlet connector (42) and a liquid outlet connector (43). The liquid-cooled cavity (41) is connected to the liquid inlet connector (42) and the liquid outlet connector (43). The liquid inlet connector (42) and the liquid outlet connector (43) are respectively connected to the external liquid supply pipe and liquid return pipe to ensure the circulation of coolant.

Images