Main shaft sealing structure of slicing machine

Abstract

The utility model belongs to the technical field of silicon rod cutting, and relates to a main shaft sealing structure of a slicing machine, which comprises a bearing seat, a main shaft is rotatably supported in an inner hole of the bearing seat through a bearing component, and is characterized in that the rear end of the bearing seat is hermetically connected with a rear end cover, and the front end of the bearing seat is fixedly connected with a mounting flange; the two axial ends of the bearing assembly are axially positioned through the rear end cover, the mounting flange and the shaft shoulder of the main shaft respectively; the mounting flange is axially fastened and connected with a second sealing end cover, and the water retaining cover is pressed on the axial outer end face of the mounting flange through the second sealing end cover; the axial outer end of the main shaft is connected with a first sealing end cover in a fastening mode, and dynamic sealing is formed between the first sealing end cover and a second sealing end cover. The bearing seat, the rear end cover and the mounting flange are provided with air channels which are communicated with one another, and the air channels are configured to be radial air channels on the mounting flange. According to the sealing structure, the problem that impurities such as cutting fluid and silicon powder enter the bearing is solved, the failure rate of equipment is reduced, and meanwhile the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of silicon rod cutting and relates to a main shaft sealing structure of a slicer. Background Art

[0002] The diamond wire slicer is a special precision equipment used for silicon wafer cutting in solar photovoltaic equipment. It is the equipment with the highest production cost and the highest technical difficulty in the front-end process of solar cells (crystal pulling, squaring, and slicing). The slicer is a device used to cut silicon rods into thin silicon wafers. A large number of diamond wires are densely wound on the rubber-coated guide rollers with grooves. The silicon rods are fed in a direction orthogonal to the diamond wires. The spindle drives the rubber-coated guide rollers to rotate and then drives the diamond wires to move and cut the silicon rods. During cutting, the cutting fluid will continuously lubricate and cool the silicon rods and diamond wires through the spray system. Because the spindle needs to drive the rubber-coated guide rollers, it will always be exposed to an environment with cutting fluid. The spindle sealing structure of traditional equipment is relatively simple. After long-term operation, cutting fluid, silicon powder, etc. will enter the bearings, causing bearing damage and locking and shutdown failures. Summary of the invention

[0003] In view of the above problems, the utility model provides a main shaft sealing structure of a slicer, which solves the problem of impurities such as cutting fluid and silicon powder entering into the bearing, reduces the failure rate of the equipment, and also improves production efficiency.

[0004] According to the technical solution of the utility model: a spindle sealing structure of a slicer includes a bearing seat, and the spindle is rotatably supported in the inner hole of the bearing seat through a bearing assembly, characterized in that the rear end of the bearing seat is sealed and connected to the rear end cover, and the front end is fixedly connected to the mounting flange, and the axial ends of the bearing assembly are axially positioned respectively through the rear end cover, the mounting flange and the shoulder of the spindle;

[0005] The mounting flange is axially fastened to the second sealing end cover, and the water retaining cover is pressed against the axial outer end surface of the mounting flange through the second sealing end cover;

[0006] The axial outer end of the main shaft is tightly connected to the first sealing end cover, and a dynamic seal is formed between the first sealing end cover and the second sealing end cover;

[0007] The bearing seat, the rear end cover and the mounting flange are provided with mutually connected air passages, and the air passages are constructed as radial air passages on the mounting flange, and radially penetrating radial channels are provided on the mounting flange corresponding to the side of the radial air passages.

[0008] As a further improvement of the utility model, the air inlet end corresponding to the airway on the rear end cover is sealed and connected to an air pipe joint.

[0009] As a further improvement of the utility model, the first sealing end cover and the second sealing end cover are provided with annular grooves embedded in each other to form a labyrinth seal.

[0010] As a further improvement of the utility model, the outer diameter of the water retaining cover is smaller than the inner diameter of the second sealing end cover, and the inner diameter of the water retaining cover is larger than the outer diameter of the shaft shoulder of the main shaft.

[0011] As a further improvement of the utility model, a first oil baffle cover is arranged between the shaft shoulder of the main shaft and the end face of the bearing assembly, and the oil groove of the first oil baffle cover is arranged in a groove on the surface of the shaft shoulder.

[0012] As a further improvement of the utility model, a guide slope is constructed at the inner end of the radial channel near the radial air outlet, and the lower end of the guide slope extends to the radial channel.

[0013] As a further improvement of the utility model, an inner ring sealing ring and an outer ring sealing ring are coaxially arranged between the bearing seat, the mounting flange and the rear end cover, and the air duct is placed between the inner ring sealing ring and the outer ring sealing ring.

[0014] As a further improvement of the utility model, the bearing assembly includes a plurality of bearings arranged in sequence along the axial direction, the bearing close to the rear end cover is positioned by an inner positioning ring and an outer positioning ring, and a second oil deflector is arranged between the inner positioning ring and the outer positioning ring.

[0015] The technical effect of the utility model is that the utility model has a reasonable and ingenious structure, and makes targeted improvements to the problem of unreliable spindle sealing in existing similar products during operation. The five-layer sealing structure realizes reliable sealing of the spindle, effectively solves the problem of impurities such as cutting fluid and silicon powder entering the bearing, reduces the failure rate of the equipment, and also improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0017] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0018] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. The described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0019] Figure 1 The invention comprises 1-main shaft; 2-first sealing end cover; 3-second sealing end cover; 4-mounting flange; 5-sealing ring; 6-rear end cover; 7-trachea joint; 8-bearing seat; 9-oil retaining cover; 10-water retaining cover, etc.

[0020] like Figure 1 As shown, the utility model is a spindle sealing structure of a slicer, including a bearing seat 8, and the spindle 1 is rotatably supported in the inner hole of the bearing seat 8 through a bearing assembly. The rear end of the bearing seat 8 is sealed and connected to the rear end cover 6, and the front end is fixedly connected to the mounting flange 4. The axial ends of the bearing assembly are axially positioned by the rear end cover 6, the mounting flange 4 and the shoulders of the spindle 1 respectively.

[0021] The mounting flange 4 is axially fastened to the second sealing end cover 3 , and the water retaining cover 10 is pressed against the axial outer end surface of the mounting flange 4 through the second sealing end cover 3 .

[0022] The axial outer end of the main shaft 1 is tightly connected to the first sealing end cover 2, and a dynamic seal is formed between the first sealing end cover 2 and the second sealing end cover 3. Specifically, Figure 1 As shown, the first sealing end cover 2 and the second sealing end cover 3 are provided with annular grooves which are embedded in each other to form a labyrinth seal, thereby achieving reliable dynamic sealing.

[0023] like Figure 1 As shown, the bearing seat 8, the rear end cover 6 and the mounting flange 4 are provided with mutually connected air passages, and the air passages are constructed as radial air passages on the mounting flange 4, and radial passages are opened on the mounting flange 4 corresponding to the radial air passages. It can be understood that the air passages include radial air passages and axial air passages, wherein the radial air passages are arranged on the mounting flange 4 as described above, and the axial air passages include the rear end cover air passages, the bearing seat air passages and the flange axial air passages arranged on the mounting flange 4, and one end of the flange axial air passage is connected to the radial air passage, and the other end is connected to the bearing seat air passage and the rear end cover air passage. During operation, the cutting fluid will flow along the radial passage to the bottom of the flow channel frame.

[0024] Furthermore, the rear end cover 6 is sealed and connected to an air pipe joint 7 corresponding to the air inlet end of the airway.

[0025] The outer diameter of the water retaining cover 10 is smaller than the inner diameter of the second sealing end cover 3 , and the inner diameter of the water retaining cover 10 is larger than the outer diameter of the shaft shoulder of the main shaft 1 .

[0026] A first oil shield 9 is arranged between the shaft shoulder of the main shaft 1 and the end face of the bearing assembly, and the oil groove of the first oil shield 9 is arranged in the groove on the surface of the shaft shoulder. The first oil shield 9 is coated with waterproof grease, which can also prevent cutting fluid and silicon powder from entering the bearing.

[0027] A guide slope is constructed at the inner end of the radial channel near the radial airway outlet, and the lower end of the guide slope extends to the radial channel.

[0028] A sealing ring 5 is provided between the bearing seat 8 and the mounting flange 4 and the rear end cover 6. The sealing ring 5 includes an inner ring sealing ring and an outer ring sealing ring which are coaxially arranged. An air passage is provided between the inner ring sealing ring and the outer ring sealing ring, so that the gas can only be discharged through the air passage and will not be blown back into the bearing.

[0029] The bearing assembly includes a plurality of bearings arranged in sequence along the axial direction. The bearing close to the rear end cover 6 is positioned by an inner positioning ring and an outer positioning ring. A second oil retaining cover is arranged between the inner positioning ring and the outer positioning ring.

[0030] When the utility model is working, the first sealing end cover 2 rotates synchronously with the main shaft 1, the mounting flange 4 is fixed on the frame, and only the main shaft 1 and the first sealing end cover 2 rotate in the whole structure. The main shaft 1 drives the first sealing end cover 2 to rotate at a high speed to throw out a part of the cutting fluid.

[0031] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A spindle sealing structure for a slicer, comprising a bearing seat (8), wherein the spindle (1) is rotatably supported in an inner hole of the bearing seat (8) through a bearing assembly, and wherein: The rear end of the bearing seat (8) is sealingly connected to the rear end cover (6), and the front end is fixedly connected to the mounting flange (4), and the axial ends of the bearing assembly are axially positioned by the rear end cover (6), the mounting flange (4) and the shaft shoulder of the main shaft (1). The mounting flange (4) is axially fastened to the second sealing end cover (3), and the water retaining cover (10) is pressed against the axial outer end surface of the mounting flange (4) through the second sealing end cover (3); The axial outer end of the main shaft (1) is tightly connected to the first sealing end cover (2), and a dynamic seal is formed between the first sealing end cover (2) and the second sealing end cover (3); The bearing seat (8), the rear end cover (6) and the mounting flange (4) are provided with mutually communicating air passages, and the air passages are constructed as radial air passages on the mounting flange (4), and a radially penetrating radial channel is provided on the mounting flange (4) corresponding to the side of the radial air passage.

2. The spindle sealing structure of a slicer according to claim 1, characterized in that: The rear end cover (6) is sealably connected to an air pipe joint (7) corresponding to the air inlet end of the air passage.

3. The main shaft sealing structure of the slicer according to claim 1, characterized in that: The first sealing end cover (2) and the second sealing end cover (3) are provided with annular grooves which are embedded in each other to form a labyrinth seal.

4. The main shaft sealing structure of a slicer according to claim 1, characterized in that: The outer diameter of the water retaining cover (10) is smaller than the inner diameter of the second sealing end cover (3), and the inner diameter of the water retaining cover (10) is larger than the outer diameter of the shaft shoulder of the main shaft (1).

5. The main shaft sealing structure of a slicer according to claim 1, characterized in that: A first oil baffle cover (9) is arranged between the shaft shoulder of the main shaft (1) and the end surface of the bearing assembly, and the oil groove of the first oil baffle cover (9) is arranged in a matching groove on the surface of the shaft shoulder.

6. The main shaft sealing structure of a slicer according to claim 1, characterized in that: A guide slope is constructed at the inner end of the radial channel near the radial airway outlet, and the lower end of the guide slope extends to the radial channel.

7. The main shaft sealing structure of a slicer according to claim 1, characterized in that: An inner ring sealing ring and an outer ring sealing ring are coaxially arranged between the bearing seat (8), the mounting flange (4) and the rear end cover (6), and the air passage is arranged between the inner ring sealing ring and the outer ring sealing ring.

8. The main shaft sealing structure of a slicer according to claim 1, characterized in that: The bearing assembly comprises a plurality of bearings arranged in sequence along the axial direction, the bearing close to the rear end cover (6) is positioned by an inner positioning ring and an outer positioning ring, and a second oil retaining cover is arranged between the inner positioning ring and the outer positioning ring.

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