Sealing device, bearing box and wire cutting machine

Abstract

The utility model relates to the technical field of sealing structures, in particular to a sealing device, a bearing box and a wire cutting machine, and aims to solve the problem that cutting powder generated in the process of cutting a to-be-cut part by an existing wire cutting machine is diffused to the bearing box, and the bearing lubricating environment is damaged. In order to achieve the purpose, the sealing device comprises a sealing flange provided with an air inlet; the pressing end cover is connected with the sealing flange, a center hole is formed in the pressing end cover in the axial direction, and the inner diameter of the sealing flange is larger than that of the pressing end cover, so that an annular cavity is formed between the sealing flange and the mounting body; and the gas guide assembly comprises a gas inlet pipe and a gas guide piece arranged on the gas inlet pipe, and the gas guide piece is connected with the sealing flange so that gas in the gas inlet pipe can enter the gas inlet hole through the gas guide piece. According to the bearing box, through the arrangement of the gas guide assembly, a gas barrier is formed between the pressing end cover and the mounting main body, so that the path of cutting powder entering the bearing box can be blocked, and the sealing performance of the bearing box is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sealing structures, and specifically provides a sealing device, a bearing box and a wire cutting machine. Background Art

[0002] Wire cutting is a processing method in which the cutting wire reciprocates at high speed and moves relative to the workpiece to be cut (such as photovoltaic silicon rods, semiconductors, silicon carbide, sapphire, magnetic materials, etc.) to make the cutting wire cut the workpiece to be cut.

[0003] In the process of cutting the workpiece to be cut, a large amount of cutting powder will be generated. The cutting powder will perform Brownian motion in the cutting chamber and diffuse into the bearing box, thereby destroying the lubrication environment of the bearing and causing lubrication failure. In severe cases, it will cause abnormal noise in the bearing box, increase in temperature, and even damage the bearing box.

[0004] Accordingly, the art needs a new sealing method to solve the above problems. Utility Model Content

[0005] The present application aims to solve the above technical problem, that is, to solve the problem that the cutting powder generated during the cutting process of the workpiece by the existing wire cutting machine diffuses into the bearing box and destroys the lubrication environment of the bearing.

[0006] In a first aspect, the present application provides a sealing device, comprising:

[0007] A sealing flange, on which an air inlet hole is formed, and two ends of the air inlet hole are respectively connected to the inner wall surface and the outer wall surface of the sealing flange;

[0008] A compression end cover connected to the sealing flange, the compression end cover is provided with a central hole in the axial direction for the installation body to pass through, the inner diameter of the sealing flange is larger than the inner diameter of the compression end cover, so that an annular cavity for accommodating gas can be formed between the sealing flange and the installation body; and

[0009] The air guide assembly comprises an air intake pipe and an air guide member arranged on the air intake pipe, wherein the air guide member is connected to the sealing flange so that the gas in the air intake pipe can enter the air intake hole through the air guide member.

[0010] By adopting the above technical solution, a blower is used to introduce gas into the air inlet pipe, and the gas flows along the air inlet pipe, passes through each air guide in turn and enters the annular cavity between the sealing flange and the installation body through the air inlet hole. The gas is stored in the annular cavity and forms a certain air pressure. Under the action of the air pressure, the gas in the annular cavity flows along the gap between the clamping end cover and the installation body to the outside of the bearing box, that is, into the cutting chamber of the wire cutting machine. Therefore, during the process of the wire cutting machine cutting the workpiece to be cut, since the gas is always filled in the gap between the clamping end cover and the installation body, and the air pressure in the gap is greater than the air pressure in the cutting chamber, a gas barrier is formed, which blocks the path for impurities such as cutting powder to enter the bearing box, thereby achieving a sealing effect and protecting the bearings in the bearing box.

[0011] In a technical solution of the above sealing device, a plurality of air inlet holes are arranged along the circumference of the sealing flange, a plurality of air guide members are arranged along the axial direction of the air inlet pipe, and the air guide members correspond to the air inlet holes one by one.

[0012] By adopting the above technical solution, a plurality of air inlet positions are formed in the circumferential direction of the sealing flange, so that the air pressure at each position in the annular cavity is more uniform, thereby improving the sealing effect.

[0013] In a technical solution of the above sealing device, two air inlet pipes are provided, and the two air inlet pipes are symmetrically arranged relative to a longitudinal section of the sealing flange.

[0014] By adopting the above technical solution, the pressure drop loss of the gas along the path can be reduced, thereby further improving the uniformity of the gas pressure at various positions in the annular cavity, thereby improving the sealing effect.

[0015] In a technical solution of the above sealing device, a plurality of air guides are provided on each of the air inlet pipes, and a plurality of air inlet holes corresponding to the air guides are opened on the sealing flange.

[0016] By adopting the above technical solution, the number of air inlet positions is increased so that the air pressure at each position in the annular cavity is more uniform, thereby improving the sealing effect.

[0017] In a technical solution of the above sealing device, the sealing device further comprises:

[0018] The gas distributor block has a gas chamber inside, and the gas inlet ends of the two gas inlet pipes are respectively connected to the gas chamber.

[0019] By adopting the above technical solution, when installing a gas source such as a blower, it is only necessary to connect the output end of the blower to the opening of the gas distributor block to simultaneously deliver gas to the two air inlet pipes, thereby reducing the complexity of the gas circuit design.

[0020] In a technical solution of the above sealing device, the air inlet hole is opened along the radial direction of the sealing flange.

[0021] By adopting the above technical solution, the length of the air inlet hole can be reduced, thereby reducing the pressure drop loss of the gas along the path and improving the sealing effect.

[0022] In a technical solution of the above sealing device, the cross-section of the air inlet hole is rectangular or waist-shaped.

[0023] By adopting the above technical solution, the cross-sectional area of ​​the air inlet hole can be increased, thereby further reducing the air resistance, increasing the flow rate of the air inlet hole, and improving the sealing effect.

[0024] In a technical solution of the above sealing device, a guide surface is provided on the end surface of the clamping end cover close to the sealing flange, and the guide surface is connected to the inner wall surface of the clamping end cover.

[0025] By adopting the above technical solution, the gas in the annular cavity can flow along the guide surface toward the gap between the compression end cover and the installation body, guiding the flow of the gas, thereby further reducing the gas resistance and improving the sealing effect.

[0026] In a technical solution of the above sealing device, the guide surface is an inclined surface or a curved surface.

[0027] In a technical solution of the above sealing device, a drainage hole is radially opened on the compression end cover.

[0028] By adopting the above technical solution, when external liquid enters the gap between the clamping end cover and the installation body, as the installation body rotates, the liquid can be discharged downward from the drainage hole under the influence of gravity, thereby preventing the mixed liquid formed by the external liquid and impurities such as dust from entering the bearing box, thereby improving the cleanliness of the bearing box. At the same time, it can also prevent impurities mixed with the external liquid from clogging the gap between the clamping end cover and the installation body, playing a sealing role, thereby reducing the frequency of equipment cleaning.

[0029] In a technical solution of the above sealing device, a liquid stopping groove is circumferentially provided on the inner wall surface of the compression end cover, and the liquid stopping groove is used to stop external liquid so that the liquid can flow along the liquid stopping groove and enter the drainage hole.

[0030] By adopting the above technical solution, when external liquid splashes into the gap between the clamping end cover and the installation body, the liquid will flow along the liquid stopping groove to the drainage hole due to the stopping effect of the liquid stopping groove, thereby guiding the discharge of the liquid and reducing the possibility of liquid entering the interior of the bearing box, thereby enhancing the sealing effect.

[0031] In a second aspect, the present application provides a bearing box for mounting a mounting body, comprising:

[0032] an outer housing having opposing first and second ends;

[0033] A bearing assembly, which is disposed in the outer shell;

[0034] The sealing device described in any one of the first aspects, wherein the sealing flange is connected to the first end of the outer shell; and

[0035] A base is connected to the second end of the outer shell.

[0036] In a technical solution of the above bearing box, the bearing box further comprises:

[0037] A sealing cover is connected to the base and is used to seal the second end of the outer shell.

[0038] By adopting the above technical solution, the sealing cover seals the second end, so that the gas in the annular cavity can only flow toward the gap direction, further improving the sealing effect of the bearing box.

[0039] In a technical solution of the above bearing box, the bearing box further comprises:

[0040] A positioning sleeve, which is disposed in the outer shell, and the positioning sleeve abuts against the bearing to limit the axial displacement of the bearing; and

[0041] A locking member is located at the second end of the outer shell, is used to be connected to the installation body, and is tightly pressed against the positioning sleeve.

[0042] By adopting the above technical solution, during the installation of the bearing box, the position of the locking member is adjusted so that the locking member is pressed against the positioning sleeve, and the positioning sleeve fixes the bearing group, thereby limiting the axial displacement of the bearing group.

[0043] In a technical solution of the above-mentioned bearing box, the locking member is a nut.

[0044] In a technical solution of the above bearing box, the bearing box further comprises:

[0045] A sealing gasket is arranged close to the sealing flange, and the sealing gasket is interference fit with the outer shell.

[0046] By adopting the above technical solution, the possibility of cutting powder and other impurities entering the interior of the bearing box can be reduced, and the sealing effect can be further improved.

[0047] In a technical solution of the above-mentioned bearing box, the sealing gasket is a labyrinth sealing gasket.

[0048] By adopting the above technical solution, a labyrinth seal is used to extend the movement path of foreign impurities when entering the outer shell, thereby further enhancing the sealing performance.

[0049] In a third aspect, the present application provides a wire cutting machine, the wire cutting machine comprising:

[0050] Cutting the frame;

[0051] The bearing box of any one of the second aspects, which is mounted on the cutting frame;

[0052] The main roller assembly comprises a cutting main roller, and both ends of the cutting main roller are respectively installed in the bearing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, in which:

[0054] Figure 1 is a schematic diagram of a sealing device provided in an embodiment of the present application and a state where the sealing device is installed on a bearing box;

[0055] Figure 2 yes Figure 1 3D exploded view of the middle seal (the intake pipe is hidden in the picture);

[0056] Figure 3 It is a transverse cross-sectional view of the bearing box given in the embodiment of the present application.

[0057] Figure 4 is a longitudinal cross-sectional view of a bearing box provided in an embodiment of the present application;

[0058] Figure 5 yes Figure 4 A partial enlarged view of part A;

[0059] Figure 6 yes Figure 4 A partial enlarged view of part B.

[0060] Reference numerals list :

[0061] 1. Sealing flange; 11. Air inlet; 2. Compression end cover; 21. Guide surface; 22. Drain hole; 23. Stop groove; 3. Air guide assembly; 31. Air inlet pipe; 32. Air guide piece; 33. Air distributor; 4. Outer shell; 41. First end; 42. Second end; 5. Bearing assembly; 6. Base; 7. Sealing cover; 81. Positioning sleeve; 82. Locking piece; 9. Sealing pad;

[0062] 100, main shaft; 200, annular cavity; 300, gap. DETAILED DESCRIPTION

[0063] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application and are not used to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0064] It should be noted that in the description of this application, the terms "upper", "lower", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting this application. In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0065] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] The cutting powder generated during the wire cutting process of the workpiece to be cut may invade the bearing box when it moves in the cutting chamber, thereby affecting the lubrication effect of the bearing box. Therefore, in some related technologies, in order to reduce the damage caused by the cutting powder to the bearing box, an air compressor is used to generate high-pressure gas, which is passed into the gap between the sealing end cover of the bearing box and the rotating spindle, so that the high-pressure gas is blown out along the above gap toward the cutting chamber, thereby preventing the cutting powder in the cutting chamber from entering the bearing box.

[0067] When the above-mentioned air compressor is used as the gas source, the gas produced by the air compressor has a high air pressure, but a small flow rate, and it is difficult to maintain a stable purge airflow for a long time. Under the condition of long-term operation of the bearing box, cutting powder will still invade the bearing box, affecting the lubrication performance of the bearing box. On the other hand, the main industrial use of air compressors is to provide pneumatic power, refrigeration operations, etc. Using them for a long time in the sealing operation of the bearing box will incur high costs. Therefore, based on cost considerations, in actual applications, one air compressor is often used to supply air to multiple bearing boxes or other equipment, and this will further reduce the sealing effect due to the pressure loss and flow loss caused by the complex air path.

[0068] Therefore, all of the above methods have significant drawbacks.

[0069] Reference Figure 1 and Figure 2 , is a sealing device disclosed in the present application, which includes a sealing flange 1, a clamping end cover 2 and an air guide component 3.

[0070] The sealing flange 1 is used to be installed at the open end of the bearing box, and an air inlet hole 11 is provided on the sealing flange 1, one end of the air inlet hole 11 is connected to the inner wall surface of the sealing flange 1, and the other end is connected to the outer wall surface of the sealing flange 1. In one implementation of the present application, the air inlet hole 11 is provided along the radial direction of the sealing flange 1.

[0071] The clamping end cover 2 is connected to the sealing flange 1. Specifically, the clamping end cover 2 can be detachably connected to the sealing flange 1 by bolt connection or the like. A central hole is provided in the axial direction on the clamping end cover 2 for the installation body to pass through. When the installation body is installed on the bearing box, it passes through the sealing flange 1 and the clamping end cover 2 in sequence. It should be understood that the above-mentioned installation body can be a rotating shaft workpiece such as a spindle.

[0072] The inner diameter of the sealing flange 1 is larger than the inner diameter of the clamping end cover 2, so that when the sealing device is installed on the bearing box, an annular cavity is formed between the sealing flange 1 and the installation body, and the gas can enter the annular cavity through the air inlet hole 11, forming a certain air pressure in the annular cavity, and then the gas in the annular cavity is discharged through the gap between the clamping end cover 2 and the installation body.

[0073] The air guide assembly 3 includes an air intake pipe 31 and an air guide member 32. Figure 1 The air inlet pipe 31 is arranged around the circumference of the sealing flange 1. The air guide assembly 3 specifically includes two air inlet pipes 31. The two air inlet pipes 31 are symmetrically arranged relative to a longitudinal section of the sealing flange 1. Figure 1 Take the air intake pipe 31 on the left side of the middle as an example, which is divided into two sections, upper and lower, and the two ends of the air guide 32 are respectively connected to the upper and lower sections of the air intake pipe 31. The air guide 32 has a gas channel, which is respectively connected to the air intake pipe 31 and the air intake hole 11, that is, the air intake pipe 31 is connected to the air intake hole 11 through the air guide 32. One end of the air intake pipe 31 is open, and the other end is closed, and the open end of the air intake pipe 31 is the air intake end. When the above method is adopted, the gas enters the two air intake pipes 31 respectively, moves in opposite directions and enters the air intake holes 11 on both sides of the sealing flange 1.

[0074] Furthermore, each air inlet pipe 31 is connected to a plurality of air guides 32 , and correspondingly, the sealing flange 1 is provided with a plurality of air inlet holes 11 corresponding to the air guides 32 .

[0075] It is understandable that, in another implementation, the air guide assembly 3 may also include only one air inlet pipe 31, which is arranged around the outer peripheral surface of the sealing flange 1. Similarly, a plurality of air guide members 32 are arranged along the axial direction of the air inlet pipe 31, and a plurality of air inlet holes 11 corresponding to the air guide members 32 are opened circumferentially on the sealing flange 1. During the process of gas flowing along the air inlet pipe 31, the gas passes through each air guide member 32 in sequence and enters the air inlet hole 11.

[0076] Reference Figure 3 When the sealing device of the present application is installed on the bearing box, the sealing flange 1 is first connected to the open end of the bearing box, and then the clamping end cover 2 is connected to the sealing flange 1, so that the installation body passes through the sealing flange 1 and the clamping end cover 2 in sequence. During the operation of the bearing box, gas is introduced into the air inlet pipe 31 through the blower, and the gas flows along the air inlet pipe 31, passes through each air guide 32 in turn, and enters the annular cavity between the sealing flange 1 and the installation body through the air inlet hole 11. The gas is stored in the annular cavity and forms a certain air pressure. Under the action of the air pressure, the gas in the annular cavity flows along the gap between the clamping end cover 2 and the installation body to the outside of the bearing box, that is, enters the cutting chamber of the wire cutting machine. Therefore, during the process of the wire cutting machine cutting the workpiece to be cut, since the gas is always filled in the gap between the clamping end cover 2 and the installation body, and the air pressure in the gap is greater than the air pressure in the cutting chamber, a gas barrier is formed, which blocks the path for impurities such as cutting powder to enter the bearing box, thereby achieving a sealing effect and protecting the bearings in the bearing box.

[0077] Compared with the existing method of directly introducing high-pressure gas into the annular cavity, the present application increases the air inlet positions in the circumferential direction of the annular cavity by setting multiple air inlet holes 11 along the circumference of the sealing flange 1, and cooperates with the air inlet holes 11 through the air guide parts 32 on the air guide assembly 3, so that the air pressure at each position in the annular cavity is more uniform, thereby improving the sealing effect.

[0078] On the other hand, the present application, through the setting of the air guide component 3, simultaneously transports gas to multiple air inlet holes 11 through the air inlet pipe 31, thereby improving the sealing of the air path structure and reducing air resistance. Therefore, a blower can be used as the air source. Taking advantage of the characteristics of the blower with low cost and large air volume, each bearing box is equipped with a blower, eliminating the complicated diversion air path setting, which not only ensures the gas flow in the annular cavity, but also reduces the sealing cost and equipment cost.

[0079] Reference Figure 3In this application, the air inlet pipe 31 is symmetrically arranged. When this method is adopted, since there are two air inlet ends for the gas, the gas moves in opposite directions in the circumferential direction of the sealing flange 1 after entering the two air inlet pipes 31, and enters the air guide 32 on the corresponding side respectively. Since the circumferential length of the sealing flange 1 is constant, it can be understood that, compared with the method of using one air inlet pipe 31, the flow is split by two air inlet pipes 31, and the length of each air inlet pipe 31 is reduced, so the pressure drop loss of the gas along the way can be reduced, thereby further improving the uniformity of the air pressure at each position in the annular cavity, and thus improving the sealing effect.

[0080] Furthermore, the air inlet ends of the two air inlet pipes 31 are connected to an air distributor block 33, which has a gas chamber inside and an opening on the air distributor block 33 that is connected to the gas chamber, and the air inlet ends of the two air inlet pipes 31 are connected to the gas chamber. In this way, when installing an air source such as a blower, it is only necessary to connect the output end of the blower to the opening of the air distributor block 33 to simultaneously deliver gas to the two air inlet pipes 31, thereby reducing the complexity of the air path design.

[0081] As a possible implementation of the present application, the cross section of the air inlet 11 is set to be rectangular or waist-shaped, and accordingly, the cross section of the gas channel in the air guide 32 is also rectangular or waist-shaped. In this way, the cross-sectional area of ​​the air inlet 11 can be increased, thereby further reducing the air resistance, increasing the flow rate of the air inlet 11, and improving the sealing effect.

[0082] Reference Figure 4 and Figure 5 As a possible implementation of the present application, a guide surface 21 is provided on the end surface of the clamping end cover 2 close to the sealing flange 1, and the guide surface 21 is connected to the inner wall surface of the clamping end cover 2, and the guide surface 21 can be an inclined surface or an arc surface.

[0083] Since the gas is viscous, by providing the guide surface 21, the gas in the annular cavity can flow along the guide surface 21 toward the gap between the clamping end cover 2 and the installation body, which guides the flow of the gas, thereby further reducing the gas resistance and improving the sealing effect. In practical applications, a guide surface can also be provided on the outer surface of the installation body, and the guide surface cooperates with the guide surface 21 on the clamping end cover 2, so that the width of the gap formed between the clamping end cover 2 and the installation body gradually decreases in the direction away from the annular cavity, thereby further guiding the flow of the gas.

[0084] Reference Figure 4 and Figure 6As a possible implementation of the present application, a drainage hole 22 is radially provided on the clamping end cover 2. When installing the sealing device on the bearing box, the installation position of the clamping end cover 2 should be adjusted so that the drainage hole 22 is located below the axis of the clamping end cover 2, and it is best to set the axis of the drainage hole 22 in the vertical direction. In this way, when the cutting fluid in the cutting chamber enters the gap between the clamping end cover 2 and the installation body, as the installation body rotates, the cutting fluid can be discharged downward from the drainage hole 22 under the influence of gravity, thereby preventing the mixed liquid of the cutting fluid and impurities such as cutting powder from entering the bearing box, improving the cleanliness of the bearing box, and also preventing the impurities mixed with the cutting fluid from clogging the gap between the clamping end cover 2 and the installation body, reducing the frequency of equipment cleaning.

[0085] Reference Figure 5 and Figure 6 The inner wall surface of the clamping end cover 2 is provided with a liquid stopping groove 23 along the circumferential direction. The liquid stopping groove 23 blocks the cutting fluid. When the cutting fluid in the cutting chamber splashes into the gap between the clamping end cover 2 and the mounting body, the cutting fluid is stopped by the liquid stopping groove 23 and flows along the liquid stopping groove 23 into the drainage hole 22, guiding the discharge of the cutting fluid and reducing the possibility of the cutting fluid entering the bearing box.

[0086] It should be noted that the present application uses the sealing device in a bearing box as an example, but this does not constitute a limitation on the application scenario of the sealing device in the present application. The sealing device can also be used in other occasions where it is necessary to isolate and seal the environment of different parts of a rotating shaft workpiece.

[0087] Reference Figure 4 and Figure 5 The present application also discloses a bearing box, which includes an outer shell 4, a bearing group 5, a base 6 and a sealing device in any of the above embodiments. The bearing box is used to install the installation body. For the convenience of description, the main shaft 100 is used as the installation body for description in this embodiment.

[0088] The outer shell 4 is a cylindrical structure with two ends open, and has a first end 41 and a second end 42 opposite to each other. The sealing device is installed at the first end 41. Specifically, the sealing flange 1 is connected to the first end 41, and the clamping end cover 2 is connected to the sealing flange. The base 6 is installed at the second end 42, and the base 6 and the second end 42 can be fixed by flange connection or the like. In the embodiment of the wire cutting machine, the spindle 100 passes through the base 6, the outer shell 4 and the sealing device in sequence.

[0089] The bearing group 5 is arranged in the outer shell 4. The specific form of the bearing group 5 can be, for example, a combination of multiple ball bearings, or a combination of a ball bearing and a roller bearing. The present application does not limit its specific form. The outer ring of each bearing has an interference fit with the outer shell 4, and the inner ring of each bearing has an interference fit with the main shaft 100. Bearing retaining rings and other structures can be arranged between adjacent bearings.

[0090] Reference Figure 3 , Figure 4 and Figure 5 When gas is introduced into the air inlet pipe 31, the gas flows through the air guide 32 and the air inlet hole 11 in sequence and enters the annular cavity 200. Under the action of air pressure, the gas in the annular cavity 200 flows toward the gap 300 between the clamping end cover 2 and the main shaft 100 and is discharged out of the bearing box, thereby forming a gas barrier at the gap 300 to prevent cutting powder or other impurities in the cutting chamber from diffusing into the bearing box along the gap 300, thereby ensuring that the lubrication environment of the bearing box is not affected.

[0091] As a possible implementation of the present application, a sealing cover 7 is also fixedly provided on the base 6, and the sealing cover 7 can be detachably fixed to the base 6 by bolt connection or the like. The sealing cover 7 closes the second end 42, so that the gas in the annular cavity 200 can only flow toward the gap 300, further improving the sealing effect.

[0092] The first end 41 of the outer shell 4 is also equipped with a sealing gasket 9, which is arranged close to the sealing flange 1, and the outer ring of the sealing gasket 9 is interference fit with the inner wall surface of the outer shell 4. By setting the sealing gasket 9, the possibility of cutting powder and other impurities entering the interior of the bearing box is reduced, and the sealing effect is further improved. Optionally, the sealing gasket 9 in the present application adopts a labyrinth sealing gasket, which can extend the movement path of external impurities when entering the outer shell 4, thereby further enhancing the sealing performance.

[0093] As a possible implementation of the present application, a positioning sleeve 81 and a locking member 82 are further provided in the bearing box. The positioning sleeve 81 is used to be sleeved on the main shaft 100, and the positioning sleeve 81 can slide relative to the main shaft 100 along the axial direction of the main shaft 100. The locking member 82 is close to the second end 42 of the outer shell 4, and the locking member 82 can move relative to the axial direction of the main shaft 100 and is fixedly connected to the main shaft 100. For example, in some implementation forms, the locking member 82 is a nut, and the outer surface of the main shaft 100 is provided with a thread that matches the nut, and the locking member 82 moves and is threadedly connected to the main shaft 100.

[0094] By setting the positioning sleeve 81 and the locking piece 82, when the main shaft 100 is installed on the bearing box, after one end of the bearing group 5 abuts against the shoulder of the main shaft 100, the positioning sleeve 81 slides along the main shaft 100 and abuts against the other end of the bearing group 5. Finally, by adjusting the position of the locking piece 82 so that the locking piece 82 abuts against the positioning sleeve 81, the positioning sleeve 81 fixes the bearing group 5, thereby limiting the axial displacement of the bearing group 5.

[0095] The present application also discloses a wire cutting machine, including a cutting frame and a main roller assembly, and a bearing box in any of the above embodiments, wherein the bearing box is installed on the cutting frame, and the main roller assembly includes a cutting main roller, and both ends of the cutting main roller are respectively installed in the bearing box.

[0096] It should be noted that the specific number of bearing boxes in the wire cutting machine is determined according to actual needs. For example, a bearing box is provided at both ends of each cutting main roller of the wire cutting machine so that both ends of the cutting main roller can be connected to the main shaft. During the rotation of the main shaft, gas is continuously introduced into the air inlet pipe, so that a gas barrier is formed in the gap between the clamping end cover 2 and the main shaft to prevent the entry of impurities such as cutting powder.

[0097] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A sealing device, characterized in that: include: A sealing flange, on which an air inlet hole is formed, and two ends of the air inlet hole are respectively connected to the inner wall surface and the outer wall surface of the sealing flange; A compression end cover connected to the sealing flange, the compression end cover is provided with a central hole for the installation body to pass through in the axial direction, the inner diameter of the sealing flange is larger than the inner diameter of the compression end cover, so that an annular cavity for accommodating gas can be formed between the sealing flange and the installation body; as well as The air guide assembly comprises an air intake pipe and an air guide member arranged on the air intake pipe, wherein the air guide member is connected to the sealing flange so that the gas in the air intake pipe can enter the air intake hole through the air guide member.

2. The sealing device according to claim 1, characterized in that: A plurality of air inlet holes are arranged along the circumferential direction of the sealing flange, and a plurality of air guide members are arranged along the axial direction of the air inlet pipe, and the air guide members correspond to the air inlet holes one by one.

3. The sealing device according to claim 1, characterized in that: There are two air inlet pipes, and the two air inlet pipes are symmetrically arranged relative to a longitudinal section of the sealing flange.

4. The sealing device according to claim 3, characterized in that: Each of the air inlet pipes is provided with a plurality of air guides, and the sealing flange is provided with a plurality of air inlet holes corresponding to the air guides.

5. The sealing device according to claim 3, characterized in that: The sealing device also includes: The gas distributor block has a gas chamber inside, and the gas inlet ends of the two gas inlet pipes are respectively connected to the gas chamber.

6. The sealing device according to claim 1, characterized in that: The air inlet hole is opened along the radial direction of the sealing flange.

7. The sealing device according to claim 1, characterized in that: The cross section of the air inlet hole is rectangular or waist-shaped.

8. The sealing device according to any one of claims 1 to 7, characterized in that: A flow guide surface is arranged on the end surface of the clamping end cover close to the sealing flange, and the flow guide surface is connected to the inner wall surface of the clamping end cover.

9. The sealing device according to claim 8, characterized in that: The guide surface is an inclined surface or a curved surface.

10. The sealing device according to claim 1, characterized in that: The compression end cover is provided with a drainage hole in the radial direction.

11. The sealing device according to claim 10, characterized in that: The inner wall surface of the compression end cover is provided with a liquid stopping groove along the circumferential direction, and the liquid stopping groove is used to stop the external liquid so that the liquid can flow along the liquid stopping groove and enter the liquid discharge hole.

12. A bearing box for mounting a mounting body, characterized in that: include: an outer housing having opposing first and second ends; A bearing assembly, which is disposed in the outer shell; The sealing device according to any one of claims 1 to 11, wherein the sealing flange is connected to the first end of the outer shell; and A base is connected to the second end of the outer shell.

13. The bearing housing according to claim 12, characterized in that: The bearing housing also includes: A sealing cover is connected to the base and is used to seal the second end of the outer shell.

14. The bearing housing according to claim 12, characterized in that: The bearing housing also includes: A positioning sleeve, which is disposed in the outer shell, and the positioning sleeve abuts against the bearing to limit the axial displacement of the bearing; and A locking member is located at the second end of the outer shell, is used to be connected to the installation body, and is tightly pressed against the positioning sleeve.

15. The bearing housing according to claim 14, characterized in that: The locking piece is a nut.

16. The bearing housing according to claim 12, characterized in that: The bearing housing also includes: A sealing gasket is arranged close to the sealing flange, and the sealing gasket is interference fit with the outer shell.

17. The bearing housing according to claim 16, characterized in that The sealing gasket is a labyrinth sealing gasket.

18. A wire cutting machine, characterized in that: The wire cutting machine comprises: Cutting frame; The bearing box according to any one of claims 12 to 17, mounted on the cutting frame; The main roller assembly comprises a cutting main roller, and both ends of the cutting main roller are respectively installed in the bearing box.

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