Main shaft cooling device with high cooling efficiency

Abstract

The utility model discloses a main shaft cooling device with high cooling efficiency, which relates to the technical field of main shafts, and comprises a main shaft, an end cover mechanism and an exhaust device, the end cover mechanism is arranged on the outer side of the left end of the main shaft, the main shaft is assembled by a worker to be butted with a motor to adapt to shaft driving, a power line enables a distributor to be electrified, and the motor drives a rotating shaft to rotate; the end cover mechanism and the exhaust device are assembled at the left end of the main shaft to fasten a motor, the main shaft locks a shaft core in an air channel groove and an end cover cap, the end cover cap and a cap sleeving block are combined to form a main shaft front end accessory, and hot air generated by axial flow friction of the main shaft is fully diffused and exhausted through the air channel groove and a Tesla valve; therefore, the cooling step of the main shaft does not stay in the water cooling stage and the liquid cooling stage any more, the Tesla valve can achieve non-contact axial flow pneumatic discharge, and the shaft motion heat of the motor in butt joint with the tail end of the main shaft can be brought out to the Tesla valve through the air channel groove to be discharged. Friction internal heat assembled on a workpiece at the head end of the main shaft can be synchronously guided to be discharged through the air channel groove and the Tesla valve.

Description

Technical Field

[0001] This utility model relates to the field of spindle technology, specifically to a spindle cooling device with high cooling efficiency. Background Technology

[0002] A machine tool spindle is the shaft on a machine tool that drives the workpiece or cutting tool to rotate. It is usually composed of a spindle, bearings, and transmission components. In a machine, it is mainly used to support transmission parts such as gears and pulleys and to transmit motion and torque, such as a machine tool spindle.

[0003] For example, patent CN218225800U discloses a spindle cooling device, including a machine tool and a spindle mounted on the machine tool. A first spiral blade and a second spiral blade with opposite rotation directions are coaxially and sequentially sleeved on the spindle. The first spiral blade and the second spiral blade rotate synchronously with the spindle. A sleeve mounted on the machine tool is coaxially sleeved on the outer side of the first spiral blade and the second spiral blade. Water inlets connected to a water source are opened at both ends of the sleeve, etc.

[0004] The aforementioned water-cooling structure employs a through-cooling method for the spindle, with the tail end connecting to the motor where the frictional heat generated during motor shaft operation is relatively low. However, the head end of the spindle connects to the chuck for clamping the workpiece, where friction is more intense during operation, generating more heat and resulting in a greater accumulation of hot airflow in this area. However, the cooling water's efficiency in removing heat during circulation is low, preventing the high-temperature gases generated by friction inside the spindle from escaping effectively and failing to achieve efficient unloading. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a spindle cooling device with high cooling efficiency. This device solves the problem that the frictional heat generated at the tail end of the spindle during operation is relatively low, while the friction at the head end of the spindle is more intense during operation, resulting in more heat generation. The cooling water has low efficiency in removing heat during circulation, which prevents the high-temperature gas generated by friction inside the spindle from being discharged smoothly and thus fails to achieve effective unloading.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency spindle cooling device, comprising a spindle, an end cap mechanism, and an exhaust device. The end cap mechanism is mounted on the outer side of the left end of the spindle. The end cap mechanism includes an air passage groove and an end cap. The end cap is fixedly mounted on the outer side of the air passage groove. The outer side of the spindle communicates with the air passage groove. A motor is mounted on the right end of the spindle. The end cap mechanism is fixedly mounted on the left side of the exhaust device. The exhaust device is inserted into the left side of the motor to maintain the rotational clearance between the end cap mechanism and the spindle. The spindle is fixedly penetrated through the inner side of the exhaust device. The exhaust device includes Tesla valves and a cap block. Eight Tesla valves are provided and are annularly inserted into the outer side of the cap block. The inner side of the Tesla valves communicates with the air passage groove through the cap block.

[0007] Preferably, a distributor is installed at the upper right corner of the motor, and the distributor is electrically connected to the motor through a wire. The right end of the main shaft is interference-fitted with the motor.

[0008] Preferably, the air duct includes an inner ring channel, a vent mesh, and an outer ring frame. The outer ring frame is provided on the outside of the inner ring channel, and eight or more vent meshes are installed on the inside of the outer ring frame. The inner ring channel communicates with the outer ring frame through the vent meshes, and the outer ring frame communicates with the Tesla valve through the vent meshes.

[0009] Preferably, the Tesla valve includes a Tesla tube body, a through groove, and a branch exhaust port. Branch exhaust ports are fixed on the left and right sides of the outer end of the Tesla tube body, and a through groove is installed on the outer side of the branch exhaust port. The bottom of the through groove is fastened to the top of the Tesla tube body.

[0010] Preferably, the vent is trapezoidal in shape with a narrow outer and wide inner opening, which facilitates the collection of hot air by the wide inner opening and the discharge of hot air through the narrow opening, thereby reducing the axial flow of hot air from the vent to diffuse and discharge.

[0011] Preferably, the Tesla tube is a long pipe with branching paths on both sides, forming a composite cavity. The Tesla tube utilizes the Tesla valve principle to achieve a unidirectional flow effect with central exhaust, preventing the water flow entering the Tesla tube from interfering with the main shaft operation. The Tesla tube also increases the unidirectional flow rate of the main shaft's axial exhaust.

[0012] This utility model provides a spindle cooling device with high cooling efficiency, which has the following beneficial effects:

[0013] This high-efficiency spindle cooling device involves workers assembling the spindle to connect to the motor adapter shaft. The power cord energizes the distributor, driving the motor to rotate the shaft. The end cap mechanism and exhaust device are mounted on the left end of the spindle and fasten the motor, locking the spindle core within the air passage groove and end cap. The end cap and sleeve block combine to form the front end accessory of the spindle. The heat generated by the axial friction of the spindle is fully diffused and discharged through the air passage groove and Tesla valve. Thus, the spindle cooling process no longer stops at the water cooling and liquid cooling stages. The Tesla valve enables non-contact axial pneumatic discharge, and the heat from the motor shaft at the tail end of the spindle can be carried out through the air passage groove to the Tesla valve for discharge. Meanwhile, the internal friction heat from the workpiece assembly at the head end of the spindle can be simultaneously guided through the air passage groove and Tesla valve for discharge. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the side cross-section of the end cap mechanism and exhaust device of this utility model, and a partially enlarged schematic diagram of the side cross-section of the air passage groove.

[0016] Figure 3 This is a schematic diagram of the Tesla valve side cross-section structure of this utility model.

[0017] In the diagram: 1. Main shaft; 2. End cap mechanism; 3. Exhaust device; 4. Motor; 5. Power distributor; 21. Air passage groove; 22. End cap; 31. Tesla valve; 32. Cap block; 211. Inner ring channel; 212. Vent mesh; 213. Outer ring frame; 311. Tesla tube body; 312. Through groove; 313. Branch exhaust port. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-3 This utility model provides a spindle cooling device with high cooling efficiency, including a spindle 1, an end cover mechanism 2, and an exhaust device 3. The end cover mechanism 2 is installed on the outer side of the left end of the spindle 1. The end cover mechanism 2 includes an air passage groove 21 and an end cap 22. The end cap 22 is fixed on the outer side of the air passage groove 21. The outer side of the spindle 1 communicates with the air passage groove 21. A motor 4 is provided on the right end of the spindle 1. The end cover mechanism 2 is fixed on the left side of the exhaust device 3. The exhaust device 3 is inserted into the left side of the motor 4 to maintain the rotational clearance between the end cover mechanism 2 and the spindle 1.

[0020] This device allows for reserved space in the air passage groove 21 for the axial frictional hot air of the main shaft 1, and guides the hot air to exhaust as it rotates along the outlet direction of the air passage groove 21.

[0021] The exhaust device 3 has a main shaft 1 fixedly passing through its inner side. The exhaust device 3 includes a Tesla valve 31 and a cap block 32. The Tesla valve 31 has eight valves and is inserted into the outer side of the cap block 32 in a ring. The inner side of the Tesla valve 31 is connected to the air passage groove 21 through the cap block 32.

[0022] The device connects the air passage 21 in series with the Tesla valve 31, forming a hot gas conduction path effect of a star-shaped exhaust architecture.

[0023] The air duct 21 includes an inner ring channel 211, a ventilation mesh 212, and an outer ring frame 213. The outer ring frame 213 is provided on the outside of the inner ring channel 211, and the inner side of the outer ring frame 213 is equipped with eight or more ventilation meshes 212. The inner ring channel 211 communicates with the outer ring frame 213 through the ventilation meshes 212, and the outer ring frame 213 communicates with the Tesla valve 31 through the ventilation meshes 212.

[0024] The breathable mesh opening 212 is trapezoidal in shape with a narrow outer and wide inner mesh surface. This facilitates the collection of hot air through the wide inner opening of the breathable mesh opening 212 and the output and discharge of hot air through the narrow opening. This reduces the axial flow of hot air from the main shaft 1, allowing the breathable mesh opening 212 to diffuse and discharge the hot air.

[0025] The inner ring channel 211 and the outer ring frame 213 are connected in series through the ventilation mesh 212, which allows the heat to diffuse and the heat to be initially diverted through the exhaust path.

[0026] The Tesla valve 31 includes a Tesla tube body 311, a through groove 312, and a branch exhaust port 313. The branch exhaust ports 313 are fixed on the left and right sides of the outer end of the Tesla tube body 311, and the through groove 312 is installed on the outside of the branch exhaust port 313. The bottom of the through groove 312 is fastened to the top of the Tesla tube body 311.

[0027] The Tesla tube 311 is a long pipe with branching paths on both sides, forming a composite tube cavity. The Tesla tube 311 utilizes the Tesla valve principle to achieve a unidirectional ventilation effect, allowing the water flow entering the Tesla tube 311 to avoid interfering with the operation of the main shaft 1. The Tesla tube 311 also increases the unidirectional ventilation velocity of the axial flow exhaust of the main shaft 1.

[0028] The upper right corner of the motor 4 is equipped with a distributor 5, which is electrically connected to the motor 4 via a wire. The right end of the spindle 1 is interference-fitted with the motor 4. This power source indicates that the spindle 1 is driven by the motor 4 on the machine tool.

[0029] The spindle 1 is assembled by the staff to connect to the motor 4 and adapt to the shaft movement. The power cable powers the distributor 5 to drive the motor 4 to rotate. The end cap mechanism 2 and the exhaust device 3 are assembled on the left end of the spindle 1 and fasten the motor 4. The spindle 1 is locked in the air passage groove 21 and the end cap 22. The end cap 22 and the sleeve block 32 are combined to form the front end accessory of the spindle 1. The heat generated by the axial friction of the spindle 1 is fully diffused and discharged through the air passage groove 21 and the Tesla valve 31. Thus, the cooling process of the spindle 1 no longer stops at the water cooling and liquid cooling stages. The Tesla valve 31 can realize non-contact axial pneumatic discharge. The axial heat of the spindle 1 connected to the motor 4 at the tail end can be carried out through the air passage groove 21 to the Tesla valve 31 for discharge. The internal friction heat of the workpiece assembly at the head end of the spindle 1 can be synchronously guided to be discharged through the air passage groove 21 and the Tesla valve 31.

[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A spindle cooling device with high cooling efficiency, characterized in that: Includes a main shaft (1), an end cap mechanism (2), and an exhaust device (3). The end cap mechanism (2) is installed on the outer side of the left end of the main shaft (1). The end cap mechanism (2) includes an air passage groove (21) and an end cap (22). The end cap (22) is fixed on the outer side of the air passage groove (21). The outer side of the main shaft (1) is connected to the air passage groove (21). A motor (4) is installed on the right end of the main shaft (1). The end cap mechanism (2) is fixed on the left side of the exhaust device (3). The exhaust device (3) is inserted into the left side of the motor (4) to maintain the rotational clearance between the end cap mechanism (2) and the main shaft (1). The exhaust device (3) has a main shaft (1) fixedly passing through its inner side. The exhaust device (3) includes a Tesla valve (31) and a cap block (32). There are eight Tesla valves (31) which are inserted into the outer side of the cap block (32) in a ring. The inner side of the Tesla valve (31) is connected to the air passage groove (21) through the cap block (32).

2. The spindle cooling device with high cooling efficiency according to claim 1, characterized in that: The motor (4) is equipped with a distributor (5) at the upper right corner. The distributor (5) is electrically connected to the motor (4) through a wire. The right end of the main shaft (1) is interference-fitted with the motor (4).

3. The spindle cooling device with high cooling efficiency according to claim 1, characterized in that: The air channel (21) includes an inner ring channel (211), a ventilation mesh (212), and an outer ring frame (213). The outer ring frame (213) is provided on the outside of the inner ring channel (211), and the inner side of the outer ring frame (213) is equipped with more than eight ventilation meshes (212). The inner ring channel (211) is connected to the outer ring frame (213) through the ventilation meshes (212), and the outer ring frame (213) is connected to the Tesla valve (31) through the ventilation meshes (212).

4. The spindle cooling device with high cooling efficiency according to claim 1, characterized in that: The Tesla valve (31) includes a Tesla tube body (311), a through groove (312), and a branch exhaust port (313). The branch exhaust ports (313) are fixed on the left and right sides of the outer end of the Tesla tube body (311). The through groove (312) is installed on the outside of the branch exhaust port (313). The bottom of the through groove (312) is fastened to the top of the Tesla tube body (311).

5. A high-efficiency spindle cooling device according to claim 3, characterized in that: The breathable mesh opening (212) is trapezoidal in shape with a narrow outer and wide inner mesh surface.

6. A high-efficiency spindle cooling device according to claim 4, characterized in that: The Tesla tube (311) is a long pipe with branching paths on the left and right, forming a composite tube cavity.

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