Cooling device for a machine tool spindle

Abstract

The utility model discloses a cooling device of lathe main shaft, including the casing, the main shaft through bearing installation in the casing, install the sealing cover at the casing end portion department, set up the liquid inlet and the liquid outlet on the casing, the inner chamber of casing is cylindrical, be provided with the helical flow guide vane in the casing, the liquid inlet and the liquid outlet are located respectively at the both ends near department of flow guide vane, the clearance between the inner edge of flow guide vane and main shaft is 0.8 2mm, the utility model has the advantages in that: through the application of the device, the main shaft can maintain more stable temperature state in the high -speed operation process, avoids the processing precision decline caused by temperature rise, thereby effectively guarantees the processing quality of part.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and in particular to a cooling device for a machine tool spindle. Background Technology

[0002] Lathes, as common machining equipment, are widely used in the manufacture of shafts and discs. In these operations, the spindle, as a key component ensuring the dimensional accuracy and precision of the lathe's machining, is of paramount importance. However, during workpiece machining, the spindle generates a large amount of heat due to its high-speed rotation, which not only affects machining accuracy but may also shorten the spindle's lifespan. Therefore, employing effective cooling methods to cool the spindle is particularly important.

[0003] Traditionally, to extend the lifespan and maintain the performance of the spindle, liquid conduction cooling is typically used. This method involves circulating coolant to contact the heat-generating parts and remove heat. However, in existing technology, the coolant flows directly from the inlet end of the housing to the outlet end, exhibiting a straight-line flow. This cooling method results in low heat exchange efficiency between the coolant and the spindle, significantly limiting the cooling effect and requiring further improvement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cooling device for machine tool spindles.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A cooling device for a machine tool spindle includes a housing, a spindle mounted inside the housing via bearings, a sealing cover mounted at the end of the housing, and a liquid inlet and a liquid outlet disposed on the housing. The inner cavity of the housing is cylindrical, and a spiral guide vane is disposed inside the housing. The liquid inlet and the liquid outlet are located near both ends of the guide vane, respectively. The gap between the inner edge of the guide vane and the spindle is 0.8-2 mm.

[0006] Preferably, heat dissipation fins are provided on the outer wall of the shell, and the heat dissipation fins are distributed in a ring along the outer wall of the shell.

[0007] Preferably, the thickness of the guide plate is 1-2 mm.

[0008] Preferably, the housing and the guide vane are an integral part, and the housing and the guide vane are made of copper alloy material.

[0009] Preferably, the gap between the inner edge of the guide vane and the main shaft is 1 mm.

[0010] The above technical solution has the following advantages: This invention relates to a lathe spindle cooling device that effectively improves the heat exchange efficiency between the coolant and the spindle by incorporating spiral guide vanes within the housing. This structure not only extends the coolant's flow path, allowing for more thorough contact with the spindle and thus enhancing the cooling effect, but the guide vanes also conduct absorbed heat to the housing for auxiliary heat dissipation, further improving overall heat dissipation efficiency. Through the application of this device, the spindle can maintain a more stable temperature during high-speed operation, preventing a decrease in machining accuracy due to temperature rise and effectively ensuring the quality of machined parts. Simultaneously, the excellent cooling effect also helps reduce thermal stress and wear on the spindle, extending its service life, demonstrating significant technical advantages and application value. Attached Figure Description

[0011] Figure 1 This is a front view of one embodiment of the present utility model; Figure 2 for Figure 1 Sectional view along the middle AA; Figure 3 for Figure 2 Enlarged view of section B; Figure 4 For along Figure 1 Enlarged cross-sectional view of CC; Figure 5 for Figure 1 A three-dimensional image; In the picture: 1-Housing, 2-Bearing, 3-Main shaft, 4-Sealing cover, 5-Liquid inlet, 6-Liquid outlet, 7-Guide plate, 8-Heat dissipation fins. Detailed Implementation

[0012] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0013] As shown in the attached figure, a cooling device for a machine tool spindle includes a housing 1, a spindle 3 mounted inside the housing 1 via bearings 2, a sealing cover 4 mounted at the end of the housing 1, and a liquid inlet 5 and a liquid outlet 6 disposed on the housing 1. The inner cavity of the housing 1 is cylindrical, and a spiral guide vane 7 is disposed inside the housing 1. The liquid inlet 5 and the liquid outlet 6 are located near both ends of the guide vane 7, respectively. The gap between the inner edge of the guide vane 7 and the spindle 3 is 0.8-2mm, preferably 1mm, to ensure that the coolant can form a spiral flow, allowing the coolant to fully contact the spindle 3 and the guide vane 7, quickly carrying away the heat from the spindle 3, and transferring a portion of the heat to the housing 1 for heat dissipation through the guide vane 7, thereby increasing the heat dissipation effect.

[0014] As a further improvement to this embodiment, heat dissipation fins 8 are provided on the outer wall of the housing 1. The heat dissipation fins 8 are distributed in a ring along the outer wall of the housing 1. By providing heat dissipation fins 8, the passive heat dissipation capacity of the housing 1 can be further provided, so as to further realize the heat dissipation and cooling of the coolant inside the housing 1.

[0015] As a specific technical solution in this embodiment, the thickness of the guide plate 7 is 1-2mm, the housing 1 and the guide plate 7 are an integral part, and the housing 1 and the guide plate 7 are preferably made of copper alloy material with good thermal conductivity.

[0016] The working process is as follows: First, coolant enters through the inlet 5 on the housing 1. Due to the spiral guide vanes 7 inside the housing 1, the coolant flows spirally along the vanes 7. During this process, the coolant fully contacts the spindle 3 and the guide vanes 7, effectively carrying away heat from the spindle 3 and conducting some of the heat to the housing 1 for dissipation. Next, the coolant, having absorbed heat, approaches the outlet 6 and flows out through it, completing one cooling cycle. The annularly distributed heat dissipation fins 8 on the outer wall of the housing 1 further enhance the passive heat dissipation capacity of the housing 1, contributing to the cooling of the coolant. This invention achieves efficient and stable cooling of the spindle 3 by optimizing the coolant flow path and enhancing the heat dissipation structure.

[0017] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A cooling device for a machine tool spindle, comprising a housing (1), a spindle (3) mounted in the housing (1) via bearings (2), a sealing cover (4) mounted at the end of the housing (1), and a liquid inlet (5) and a liquid outlet (6) disposed on the housing (1); characterized in that: The inner cavity of the housing (1) is cylindrical, and a spiral guide vane (7) is provided inside the housing (1); the liquid inlet (5) and the liquid outlet (6) are located near the two ends of the guide vane (7); the gap between the inner edge of the guide vane (7) and the main shaft (3) is 0.8-2mm.

2. The cooling device for the machine tool spindle according to claim 1, characterized in that: The outer wall of the shell (1) is provided with heat dissipation fins (8), which are distributed in a ring along the outer wall of the shell (1).

3. The cooling device for the machine tool spindle according to claim 1 or 2, characterized in that: The thickness of the guide plate (7) is 1-2 mm.

4. The cooling device for the machine tool spindle according to claim 1 or 2, characterized in that: The housing (1) and the guide plate (7) are an integral part, and the housing (1) and the guide plate (7) are made of copper alloy material.

5. The cooling device for the machine tool spindle according to claim 3, characterized in that: The housing (1) and the guide plate (7) are an integral part, and the housing (1) and the guide plate (7) are made of copper alloy material.

6. The cooling device for the machine tool spindle according to claim 1 or 2, characterized in that: The gap between the inner edge of the guide vane (7) and the main shaft (3) is 1 mm.

7. The cooling device for the machine tool spindle according to claim 3, characterized in that: The gap between the inner edge of the guide vane (7) and the main shaft (3) is 1 mm.

8. The cooling device for the machine tool spindle according to claim 4, characterized in that: The gap between the inner edge of the guide vane (7) and the main shaft (3) is 1 mm.

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