Main shaft spiral type air sealing structure

Abstract

The utility model relates to a main shaft spiral type air sealing structure, and relates to the technical field of main shaft sealing. The main shaft spiral air-tight sealing structure comprises a shaft sleeve used for being arranged on a main shaft in a sleeving mode, the shaft sleeve is used for being connected with an instrument shell, a disc is further arranged on the shaft sleeve, the main shaft is sleeved with the disc, an air inlet channel and a spiral groove are formed in the disc, one end of the air inlet channel is used for being communicated with an air source, and the other end of the air inlet channel is used for being communicated with the spiral groove. The other end of the air inlet channel is communicated with the spiral groove, the forming axis of the spiral groove is the same as the axis of the main shaft, and a gap is reserved between the inner wall of the disc and the outer wall of the main shaft. Compared with the prior art, the main shaft sealing structure has the following effects that the air inlet channel can introduce air into the annular circulating groove firstly and then into the spiral groove, so that the space between the outer wall of the main shaft and the inner wall of the spiral groove is filled with the air, the space between the main shaft and the disc is sealed, the probability that the main shaft is damaged during use is reduced, and the service life of the main shaft is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of spindle sealing, and in particular to a spindle spiral air sealing structure. Background Art

[0002] With the continuous development of social economy and the increasing level of science and technology, my country's manufacturing industry is also booming. Machine tools and other processing equipment, as equipment for manufacturing workpieces in the manufacturing industry, play a major role in the construction of national economic modernization. The rotating spindles in machine tools and other processing equipment generally need to be sealed to isolate the lubricated parts from the external environment so as to prevent the lubricating oil from leaking.

[0003] Regarding the above-mentioned related technologies, since the existing technology generally adopts a sealing method in which a rubber ring and an oil seal are matched, this method will have problems of oil leakage and oil seepage after long-term use, which can easily cause damage to the main shaft and thus reduce the service life of the main shaft, so there is room for improvement. Utility Model Content

[0004] In order to reduce the probability of damage to the main shaft during use, the present application provides a main shaft spiral air sealing structure.

[0005] This application provides a method that adopts the following technical solution:

[0006] A spindle spiral air sealing structure includes a sleeve for being sleeved on the spindle, the sleeve being used to connect to the instrument housing, the sleeve being further provided with a disc, the disc being sleeved on the spindle, the disc being provided with an air inlet channel and a spiral groove, one end of the air inlet channel being used to connect to a gas source, the other end of the air inlet channel being connected to the spiral groove, the axis of the spiral groove being the same as the axis of the spindle, and a gap being left between the inner wall of the disc and the outer wall of the spindle.

[0007] By adopting the above technical scheme, compared with the prior art, which uses a sealing method that uses a rubber ring and an oil seal, which is prone to oil leakage, oil seepage and impurity generation, the present application arranges the air intake channel and the spiral groove so that the gas can pass through the air intake channel and enter the spiral groove. The gas fills the space between the main shaft and the inner wall of the spiral groove, and then flows out from the gap, thereby sealing the main shaft and the disc; the air sealing method in the present application can effectively reduce the probability of oil leakage and oil seepage, thereby reducing the probability of damage to the main shaft during use, reducing the damage to the main shaft, and thus effectively ensuring the service life of the main shaft, while also being able to improve the production accuracy of the workpiece using the equipment using the structure of the present application.

[0008] Preferably, an oil inlet channel is provided on the end of the sleeve away from the disc, one end of the oil inlet channel is connected to the outside, the gap between the sleeve and the instrument housing is connected to the other end of the oil inlet channel, and a connecting channel is provided on the outer wall of the sleeve, the gap between the sleeve and the main shaft is connected to the gap between the sleeve and the instrument housing through the connecting channel.

[0009] By adopting the above technical solution and setting the oil inlet channel, the oil used for lubrication can be passed from the outside into the gap between the sleeve and the instrument housing through the oil inlet channel, and then passed into the gap between the sleeve and the main shaft through the connecting channel, thereby achieving lubrication between the main shaft and the sleeve; at the same time, during the rotation of the main shaft, a layer of oil film can be formed between the sleeve and the main shaft, reducing the friction resistance when the main shaft rotates, thereby reducing the damage to the main shaft and the sleeve when the main shaft rotates, and at the same time, the main shaft and the sleeve can be cooled.

[0010] Preferably, a first annular oil groove is further provided on the outer wall of the sleeve, and the end of the oil inlet channel away from the outside is connected to the first annular oil groove, and the first annular oil groove and the connecting channel are connected through the gap between the sleeve and the instrument housing.

[0011] By adopting the above technical solution, the first annular oil groove is set so that the oil introduced through the oil inlet channel can first pass into the first annular oil groove and then into the gap between the shaft sleeve and the instrument housing, thereby reducing the probability of the oil being difficult to flow due to the gap between the shaft sleeve and the instrument housing being too small, thereby reducing the difficulty of oil introduction and facilitating the introduction of oil.

[0012] Preferably, a second annular oil groove is further provided on the outer side wall of the sleeve, the second annular oil groove is communicated with the first annular oil groove, and the second annular oil groove is communicated with the connecting channel through the gap between the sleeve and the instrument housing.

[0013] By adopting the above technical solution, the setting of the second annular oil groove can enable the oil in the first annular oil groove to flow into the second annular circulation groove, so that the oil in the second annular circulation groove can pass through the gap between the sleeve and the instrument housing and enter the connecting channel, thereby further reducing the probability of the oil being difficult to flow due to the small gap between the sleeve and the instrument housing, and further reducing the difficulty of passing the oil.

[0014] Preferably, an oil outlet channel is further provided on the shaft sleeve, a gap between the shaft sleeve and the main shaft is communicated with one end of the oil outlet channel, and the other end of the oil outlet channel is communicated with the outside.

[0015] By adopting the above technical solution and setting the oil outlet channel, the oil in the gap between the main shaft and the sleeve can be discharged through the oil outlet channel after use, thereby replacing the oil between the gap between the main shaft and the sleeve, thereby ensuring the lubrication effect on the rotation of the main shaft; at the same time, it also allows the impurities between the gap between the main shaft and the sleeve to flow to the outside with the oil, thereby reducing the chance of damage to the main shaft.

[0016] Preferably, the number of the oil outlet channels is set to be several.

[0017] By adopting the above technical solution and setting up a plurality of oil outlet channels, the speed at which the oil in the gap between the main shaft and the sleeve is discharged after use can be increased, thereby increasing the efficiency of replacing the oil in the gap between the main shaft and the sleeve and reducing the difficulty of oil drainage.

[0018] Preferably, the number of the communicating channels is set to be several.

[0019] By adopting the above technical solution, a plurality of connecting channels are provided, so that the oil in the gap between the sleeve and the instrument housing can pass into the gap between the main shaft and the sleeve through the plurality of connecting channels, thereby increasing the efficiency of the oil passing into the gap between the main shaft and the sleeve, further reducing the probability that the oil passed has difficulty in flowing into the gap between the main shaft and the sleeve, and further reducing the difficulty of passing the oil.

[0020] Preferably, an annular flow groove is further provided on the inner side wall of the disc, and the air inlet channel is connected with the spiral groove through the annular flow groove.

[0021] By adopting the above technical solution, the annular circulation groove is set so that the gas introduced through the air inlet channel can first flow into the annular circulation groove and then enter the spiral groove, thereby reducing the probability of gas difficulty in entering due to the small gap between the inner wall of the spiral groove and the outer wall of the main shaft, effectively facilitating the entry of gas and improving the gas entry efficiency.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The arrangement of the air inlet channel, the annular flow groove and the spiral groove allows the gas to pass through the air inlet channel, first into the annular flow groove, and then into the spiral groove, so that the gas fills the space between the outer wall of the spindle and the inner wall of the spiral groove, and seals the space between the spindle and the disc, thereby reducing the probability of damage to the spindle during use, reducing the damage to the spindle, and effectively ensuring the service life of the spindle. At the same time, it can also improve the production accuracy of the workpiece using the device with the structure of the present application;

[0024] 2. The oil inlet channel is set so that the oil used for lubrication can be passed from the outside to the gap between the sleeve and the instrument housing through the oil inlet channel, and then passed through the connecting channel to the gap between the main shaft and the sleeve, thereby achieving lubrication between the main shaft and the sleeve. At the same time, when the main shaft rotates, an oil film is formed between the sleeve and the main shaft, reducing the friction resistance when the main shaft rotates, thereby reducing the damage to the main shaft and the sleeve when the main shaft rotates, and at the same time, the main shaft and the sleeve can be cooled;

[0025] 3. The setting of the first annular oil groove and the second annular oil groove can make the oil introduced into the oil inlet channel first flow into the first annular oil groove and the second annular oil flow groove, and then pass through the gap between the shaft sleeve and the instrument housing to enter the connecting channel, thereby reducing the probability of the oil being difficult to flow due to the small gap between the shaft sleeve and the instrument housing, and reducing the difficulty of introducing oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram used to reflect the overall spindle spiral air seal structure in the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the structure of the annular circulation groove in the embodiment of the present application.

[0028] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0029] Figure 4 It is a structural schematic diagram used to reflect the oil inlet channel in the embodiment of the present application.

[0030] Figure 5 It is a structural schematic diagram used to reflect the connecting channel in the embodiment of the present application.

[0031] Explanation of the reference numerals: 1. spindle; 2. sleeve; 21. oil inlet channel; 22. first annular oil groove; 23. second annular oil groove; 24. connecting channel; 25. annular groove; 26. oil outlet channel; 3. instrument housing; 4. disc; 41. air inlet channel; 42. spiral groove; 43. annular circulation groove; 5. air inlet interface; 6. oil inlet interface. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The present application discloses a main shaft spiral air sealing structure. Figure 1 , Figure 2 and Figure 3The spiral air-sealing structure of the main shaft 1 includes a sleeve 2 for sleeved on the main shaft 1, and the sleeve 2 is used to connect with the instrument housing 3. A disc 4 is also provided on the end of the sleeve 2 away from the instrument housing 3, and the disc 4 is sleeved on the main shaft 1. The disc 4 is provided with an air inlet channel 41 and a spiral groove 42. One end of the air inlet channel 41 is used to connect with the gas source, and the other end of the air inlet channel 41 is connected with the spiral groove 42. The opening axis of the spiral groove 42 is the same as the axis of the main shaft 1. A gap is left between the inner wall of the disc 4 and the outer wall of the main shaft 1.

[0034] Reference Figure 1 and Figure 3 The disc 4 is attached to the end of the sleeve 2 away from the instrument housing 3, and the disc 4 is fixedly connected to the sleeve 2 by multiple screws. The main shaft 1, the disc 4 and the sleeve 2 are coaxially arranged. The disc 4 is also provided with an air inlet interface 5, which is inserted into the air inlet channel 41 and fixedly connected to the disc 4. The air inlet channel 41 is connected to the air inlet source through the air inlet interface 5.

[0035] Reference Figure 2 and Figure 3 The inner wall of the disk 4 is also provided with an annular flow groove 43, which is annular and coaxial with the main shaft 1. The end of the air inlet channel 41 away from the air inlet interface 5 is connected to the annular flow groove 43, and the annular flow groove 43 is connected to one end of the spiral groove 42 to facilitate the gas to pass into the spiral groove 42 and increase the gas entry efficiency.

[0036] Reference Figure 2 and Figure 3 When gas is introduced into the air inlet interface 5, the gas enters the annular flow groove 43 through the air inlet channel 41, then enters the spiral groove 42 from one end of the spiral groove 42, and flows along the inner wall of the spiral groove 42, thereby forming an airflow to achieve an air seal for the main shaft 1.

[0037] Reference Figure 1 and Figure 4 An oil inlet channel 21 is also provided on one end of the sleeve 2 away from the disc 4, and an oil inlet interface 6 is inserted at the end of the oil inlet channel 21. The oil inlet interface 6 is fixedly connected to the sleeve 2, and the oil inlet channel 21 is connected to an external oil source through the oil inlet interface. The other end of the oil inlet interface 6 extends into the sleeve 2, and is bent at the end, extending to the outside of the sleeve 2, and finally extending to the outside of the sleeve 2, and communicating with the gap between the sleeve 2 and the instrument housing 3.

[0038] Reference Figure 4The outer wall of the sleeve 2 is also provided with a first annular oil groove 22 and a second annular oil groove 23. Both the first annular oil groove 22 and the second annular oil groove 23 are circular grooves and are coaxially arranged with the sleeve 2. The second annular oil groove 23 is located on the side of the first annular oil groove 22 close to the disc 4. Both the first annular oil groove 22 and the second annular oil groove 23 are connected to the gap between the sleeve 2 and the instrument housing 3 so that the oil first flows into the first annular oil groove 22.

[0039] Reference Figure 4 The first annular oil groove 22 and the second annular oil groove 23 are connected through the gap between the sleeve 2 and the device housing 3. In other embodiments, a groove for connecting the first annular oil groove 22 and the second annular oil groove 23 may be provided on the outer wall of the sleeve 2 to increase the efficiency of oil circulation between the first annular oil groove 22 and the second annular oil groove 23.

[0040] Reference Figure 5 A plurality of communication channels 24 are also provided on the outer wall of the sleeve 2. In the embodiment of the present application, the number of the communication channels 24 is set to four to increase the oil circulation efficiency. Each communication channel 24 is provided between the first annular oil groove 22 and the second annular oil groove 23. One end of each communication channel 24 extends to the inner wall of the sleeve 2 and communicates with the gap between the sleeve 2 and the main shaft 1, so that the oil enters the gap between the sleeve 2 and the main shaft 1 through the communication channel 24.

[0041] Reference Figure 5 In other embodiments, a plurality of grooves may be provided on the inner wall of the sleeve 2 to increase the amount of oil in the gap between the sleeve 2 and the main shaft 1 and improve the lubrication effect on the main shaft 1.

[0042] Reference Figure 4 An annular groove 25 is also provided on one end of the sleeve 2 near the disc 4, and the gap between the main shaft 1 and the sleeve 2 is connected to the inner side of the annular groove 25 so that oil can enter the annular groove 25. A plurality of oil outlet channels 26 are also provided on one end of the sleeve 2 near the disc 4. In the embodiment of the present application, the number of the oil outlet channels 26 is set to two.

[0043] Reference Figure 4 One end of each oil outlet channel 26 is connected to the annular groove 25 to allow the oil in the annular groove 25 to flow out, and the other end of each oil outlet channel 26 extends away from the disc 4 and finally extends to the end of the sleeve 2 and is connected to the outside.

[0044] Reference Figure 4 and Figure 5When the oil enters the oil inlet channel 21 through the oil inlet interface 6, the oil in the oil inlet channel 21 flows into the first annular oil groove 22, and flows into the second annular oil groove 23 through the gap between the sleeve 2 and the instrument housing 3. The oil in the first annular oil groove 22 and the second annular oil groove 23 passes through the gap between the sleeve 2 and the instrument housing 3 and through the plurality of connecting channels 24 to enter the space between the main shaft 1 and the sleeve 2, thereby forming an oil film between the main shaft 1 and the sleeve 2, achieving lubrication between the main shaft 1 and the sleeve 2, and cooling the main shaft 1 and the sleeve 2.

[0045] The implementation principle of a main shaft spiral air-sealing structure of an embodiment of the present application is as follows: when in use, gas is introduced into the air inlet interface 5, the gas is introduced into the annular circulation groove 43 through the air inlet channel 41, and then enters the spiral groove 42 from one end of the spiral groove 42, and flows along the inner wall of the spiral groove 42, thereby forming an airflow to achieve air sealing of the main shaft 1, and the gas then passes out through the gap between the main shaft 1 and the disc 4.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A spindle spiral air-sealing structure, comprising a sleeve (2) for sleeved on a spindle (1), the sleeve (2) being connected to an instrument housing (3), characterized in that: A disc (4) is also provided on the shaft sleeve (2). The disc (4) is sleeved on the main shaft (1). An air intake channel (41) and a spiral groove (42) are provided on the disc (4). One end of the air intake channel (41) is used to connect to a gas source, and the other end of the air intake channel (41) is connected to the spiral groove (42). The axis of the spiral groove (42) is the same as the axis of the main shaft (1). A gap is left between the inner wall of the disc (4) and the outer wall of the main shaft (1).

2. A main shaft spiral air sealing structure according to claim 1, characterized in that: An oil inlet passage (21) is also provided on the end of the shaft sleeve (2) away from the disc (4); one end of the oil inlet passage (21) is connected to the outside, and the gap between the shaft sleeve (2) and the device housing (3) is connected to the other end of the oil inlet passage (21); a connecting passage (24) is also provided on the outer wall of the shaft sleeve (2); the gap between the shaft sleeve (2) and the main shaft (1) is connected to the gap between the shaft sleeve (2) and the device housing (3) through the connecting passage (24).

3. A main shaft spiral air sealing structure according to claim 2, characterized in that: A first annular oil groove (22) is also provided on the outer wall of the shaft sleeve (2); an end of the oil inlet channel (21) away from the outside is connected to the first annular oil groove (22); and the first annular oil groove (22) and the connecting channel (24) are connected through a gap between the shaft sleeve (2) and the device housing (3).

4. The main shaft spiral air sealing structure according to claim 3, characterized in that: A second annular oil groove (23) is also provided on the outer side wall of the shaft sleeve (2), the second annular oil groove (23) is connected to the first annular oil groove (22), and the second annular oil groove (23) is connected to the connecting channel (24) through the gap between the shaft sleeve (2) and the instrument housing (3).

5. The main shaft spiral air sealing structure according to claim 2, characterized in that: The shaft sleeve (2) is also provided with an oil outlet passage (26); the gap between the shaft sleeve (2) and the main shaft (1) is connected to one end of the oil outlet passage (26); and the other end of the oil outlet passage (26) is connected to the outside.

6. A main shaft spiral air sealing structure according to claim 5, characterized in that: The number of the oil outlet channels (26) is set to be several.

7. The main shaft spiral air sealing structure according to claim 2, characterized in that: The number of the communication channels (24) is set to be several.

8. The main shaft spiral air sealing structure according to claim 1, characterized in that: An annular circulation groove (43) is also provided on the inner side wall of the disk (4), and the air inlet channel (41) is connected to the spiral groove (42) through the annular circulation groove (43).

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