Steel belt type cylindrical grinding device

Abstract

The application discloses a steel belt type external circle grinding device, which comprises a clamping mechanism, a steel belt clamped in the clamping mechanism, and a polishing unit wrapped in the steel belt. The clamping mechanism is oppositely provided with an adjusting mechanism, the steel belt is an open loop steel belt, and one end of the steel belt is clamped in the middle of the adjusting mechanism. The application can complete on-site repair of a rotor large shaft, avoids returning the large rotor to a factory for transportation, reduces the maintenance cost and maintenance time of the large shaft, and realizes grinding processing positioning reference by the steel belt wrapped on the surface of the large shaft. Since the area of the steel belt wrapped on the large shaft is large and the surface of the steel belt is smooth, the error caused by local strain and wear on the surface of the large shaft can be homogenized, thereby realizing on-site grinding repair of the large shaft based on the local wear surface. The device has simple and portable structure and is convenient for on-site repair operation.

Description

Technical Field

[0001] This invention belongs to the technical field of large shaft external cylindrical grinding and repair equipment, specifically relating to a steel belt type external cylindrical grinding device. Background Technology

[0002] In some large steam turbine generators and large hydro turbines, large rotor journals often develop surface defects such as wear, scoring, and scratches after long-term use. After laser cladding or welding, the outer surface of the rotor needs to be ground. If it needs to be returned to the factory for repair, the rotor cannot be avoided, which greatly increases the maintenance cost and time of the large shaft. Summary of the Invention

[0003] The purpose of this invention is to provide a steel belt type external cylindrical grinding device that can perform on-site repair of rotor shafts.

[0004] The technical solution adopted in this invention is a steel belt type external cylindrical grinding device, including a clamping mechanism, in which a steel belt is clamped, and a grinding unit is wrapped inside the steel belt. An adjustment mechanism is arranged opposite to the clamping mechanism. The steel belt is an open-loop steel belt, and one end of the steel belt is clamped in the middle of the adjustment mechanism.

[0005] The invention is further characterized by:

[0006] The grinding unit includes a roller, which is connected to an electric spindle sleeve by screws. An electric spindle is installed inside the electric spindle sleeve. A grinding wheel is connected to the end of the electric spindle away from the electric spindle sleeve. The outer walls of the roller and the electric spindle sleeve are wrapped in a steel strip.

[0007] A dustproof plate is connected to the electric spindle via a first snap ring, and the dustproof plate is positioned between the grinding wheel and the electric spindle sleeve.

[0008] The clamping mechanism includes two tensioning shafts arranged in parallel to each other. The two tensioning shafts are connected by two parallel screws. Each screw is connected to a nut. Each tensioning shaft is fitted with a sleeve through a second retaining ring. A steel strip is clamped between the two sleeves. Both ends of each tensioning shaft are connected to rubber wheels through a third retaining ring. The two tensioning shafts are arranged opposite to the adjusting mechanism.

[0009] One of the tensioning shafts has handles attached to both ends.

[0010] The adjustment mechanism includes two clamping shaft positioning blocks arranged opposite each other. Each clamping shaft positioning block has two annular holes. Two clamping shafts arranged parallel to each other are connected between the opposite annular holes. The clamping shafts are arranged opposite to the tensioning shaft. The end of the steel strip is clamped between the clamping shafts. The ends of the two clamping shafts at the bottom layer are connected to gears that mesh with each other. The end of one of the clamping shafts at the bottom layer is connected to a rotating handle. The clamping shaft at the top layer is in close contact with the clamping shaft at the bottom layer.

[0011] The clamping shaft is connected to the annular hole via a fourth snap ring.

[0012] The sidewall of the clamping shaft positioning block has two pairs of through holes, which are opened at the two ends of the annular hole respectively. The through holes are connected to the set screws, which are in contact with the clamping shaft.

[0013] The beneficial effects of this invention are:

[0014] This invention relates to a steel belt type external cylindrical grinding device, which can complete on-site repair of rotor shafts, avoiding the need for large rotors to be returned to the factory for transportation, reducing the maintenance cost and time of the shaft. The steel belt is wrapped around the surface of the shaft by a rubber wheel, and the steel belt serves as the positioning reference for grinding. Since the area of ​​the shaft wrapped by the steel belt is large and the surface of the steel belt is smooth, it can even out the errors caused by local scratches and wear on the surface of the shaft. Thus, on-site grinding repair of the shaft based on the locally worn surface can be achieved. The device has a simple and portable structure, making it easy to carry out on-site repair operations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the steel belt type external cylindrical grinding device of the present invention;

[0016] Figure 2 This is a side view of the steel belt type external cylindrical grinding device of the present invention;

[0017] Figure 3 This is a schematic diagram of the grinding unit in the steel belt type external cylindrical grinding device of the present invention;

[0018] Figure 4 This is a cross-sectional view of the grinding unit in the steel belt type external cylindrical grinding device of the present invention.

[0019] Figure 5 This is a schematic diagram of the adjustment mechanism in the steel belt type external cylindrical grinding device of the present invention;

[0020] Figure 6 This is a schematic diagram of the clamping shaft positioning block in the steel belt type external cylindrical grinding device of the present invention.

[0021] In the diagram: 1. Tensioning shaft, 2. Steel belt, 3. Screw, 4. Rubber wheel, 5. Main shaft, 6. Handle, 71. Second snap ring, 72. Third snap ring, 8. Nut, 9. Sleeve, 10. Electric spindle sleeve, 11. Roller, 12. Grinding wheel, 13. Dustproof plate, 14. Electric spindle, 15. Screw, 16. First snap ring, 17. Clamping shaft, 18. Clamping shaft positioning block, 19. Gear, 20. Rotating handle, 21. Fourth snap ring, 22. Set screw, 23. Annular hole, 24. Through hole. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] The present invention relates to a steel belt type external cylindrical grinding device, such as... Figure 1-2 As shown, the device includes a clamping mechanism, in which a steel strip 2 is clamped. A grinding unit is wrapped inside the steel strip 2. An adjustment mechanism is positioned opposite the clamping mechanism. The steel strip 2 is an open-loop steel strip, with one end clamped in the middle of the adjustment mechanism. The clamping and adjustment mechanisms are located on both sides of the shaft 5 to be repaired. The bottom of the steel strip 2 wraps around the shaft 5. Moving the clamping mechanism allows the grinding unit to grind the shaft 5. Adjusting the clamping mechanism enables the longitudinal feed of the grinding unit. The steel strip 2 can even out the errors caused by wear and scratches on the surface of the shaft 5 to the positioning reference. Furthermore, the length of the steel strip 2 can be adjusted according to the diameter of the shaft 5, allowing for adjustments to the required length of the steel strip 2 for different shaft 5 diameters.

[0024] Example 1

[0025] A steel belt type external cylindrical grinding device includes a clamping mechanism, in which a steel belt 2 is clamped, and a grinding unit is wrapped inside the steel belt 2. An adjustment mechanism is arranged opposite to the clamping mechanism. The steel belt 2 is an open-loop steel belt, and one end of the steel belt 2 is clamped in the middle of the adjustment mechanism.

[0026] The clamping mechanism includes two parallel tensioning shafts 1 connected by two parallel screws 3. Each screw 3 has a nut 8 attached to its shaft. Each tensioning shaft 1 has a sleeve 9 fitted onto its shaft via a second retaining ring 71. A steel belt 2 is clamped between the two sleeves 9. Both ends of each tensioning shaft 1 are connected to rubber wheels 4 via a third retaining ring 72. The two tensioning shafts 1 are positioned opposite the adjusting mechanism. After the screws 3 pass through the two tensioning shafts 1, the distance between them is adjusted by the nuts 8, thereby adjusting the tension of the steel belt 2. The sleeves 9 and rubber wheels 4 are positioned by the second retaining ring 71 and the third retaining ring 72, respectively. The four rubber wheels 4 roll on the surface of the large shaft 5, supporting the tensioning shafts 1. The sleeves 9, positioned in the middle of the tensioning shafts 1, roll with the movement of the steel belt 2. When the steel belt 2 is tensioned, the rubber wheels 4 deform, thus adjusting the longitudinal feed of the adjusting mechanism.

[0027] One of the tensioning shafts 1 has handles 6 connected to both ends. When performing repair work, the handles 6 are held and manually rotated.

[0028] Example 2

[0029] A steel belt type external cylindrical grinding device includes a clamping mechanism, in which a steel belt 2 is clamped, and a grinding unit is wrapped inside the steel belt 2. An adjustment mechanism is arranged opposite to the clamping mechanism. The steel belt 2 is an open-loop steel belt, and one end of the steel belt 2 is clamped in the middle of the adjustment mechanism.

[0030] like Figure 3-4As shown, the grinding unit includes a roller 11, which is connected to an electric spindle sleeve 10 by screws 15. An electric spindle 14 is installed inside the electric spindle sleeve 10, and a grinding wheel 12 is connected to the end of the electric spindle 14 away from the electric spindle sleeve 10. The outer walls of the roller 11 and the electric spindle sleeve 10 are wrapped in a steel strip 2. The screws 15 connect the roller 11 and the electric spindle sleeve 10 as a whole. The electric spindle 14 is installed inside the electric spindle sleeve 10. When the operation starts, the roller 11 and the electric spindle sleeve 10 roll simultaneously, and the electric spindle 14 rotates with the electric spindle sleeve 10. At the same time, the electric spindle 14 drives the grinding wheel 12 to grind the main shaft 5.

[0031] A dustproof plate 13 is connected to the electric spindle 14 via a first retaining ring 16. The dustproof plate 13 is positioned between the grinding wheel 12 and the electric spindle sleeve 10. The dustproof plate 13 prevents chips from entering the interior of the steel belt 2.

[0032] Example 3

[0033] A steel belt type external cylindrical grinding device includes a clamping mechanism, in which a steel belt 2 is clamped, and a grinding unit is wrapped inside the steel belt 2. An adjustment mechanism is arranged opposite to the clamping mechanism. The steel belt 2 is an open-loop steel belt, and one end of the steel belt 2 is clamped in the middle of the adjustment mechanism.

[0034] like Figure 5-6 As shown, the adjustment mechanism includes two clamping shaft positioning blocks 18 arranged opposite each other. Each clamping shaft positioning block 18 has two annular holes 23. Two parallel clamping shafts 17 are connected between the opposite annular holes 23. The clamping shafts 17 are arranged opposite to the tensioning shaft 1. The end of the steel belt 2 is clamped between the clamping shafts 17. Gears 19 are connected to the near ends of the two bottom clamping shafts 17, and the two gears 19 mesh with each other. A rotating handle 20 is connected to the end of one of the bottom clamping shafts 17. The top clamping shaft 17 is in close contact with the bottom clamping shaft 17. By rotating the handle 20, one bottom clamping shaft 17 is rotated, the two gears 19 mesh, driving the other bottom clamping shaft 17 to rotate. The two bottom clamping shafts 17 rotate relative to each other. Because the upper and lower clamping shafts 17 are in close contact, they also drive the two upper clamping shafts 17 to rotate relative to each other. The end of the steel belt 2 is clamped between the left and right clamping shafts 17, thus allowing the steel belt 2 to be adjusted.

[0035] The clamping shaft 17 is connected to the annular hole 23 by a fourth snap ring 21.

[0036] The sidewall of the clamping shaft positioning block 18 has two pairs of through holes 24, which are respectively opened at both ends of the annular hole 23. A set screw 22 is connected inside the through hole 24 and contacts the clamping shaft 17. The set screw 22 can adjust the spacing between the clamping shafts 17 in the same layer.

[0037] The working principle of the steel belt type external cylindrical grinding device of the present invention is as follows:

[0038] The sleeve 9 on the tensioning shaft 1 clamps and supports the roller 11 wrapped around the top of the steel strip 2 and the electric spindle sleeve 10. The rubber wheel 4 supports the tensioning shaft 1. During the grinding and repair operation, the rotary machining is achieved by moving the handle 6 on the tensioning shaft 1. The longitudinal feed of the grinding wheel 12 is achieved by adjusting the tension of the tensioning shaft 1 through the screw 3 and nut 8. The bottom of the steel strip 2 wraps around the main shaft 5. The steel strip 2 can even out the error caused by wear and scratches on the surface of the main shaft 5 to the positioning reference. By shaking the rotating handle 20 on the clamping shaft 17, the gear 19 is engaged and drives the clamping shaft 17 to roll, thereby realizing the adjustment of the length of the steel strip 2 required for different diameters of the main shaft 5.

[0039] The steel belt type external cylindrical grinding device of the present invention can complete the on-site repair of the rotor shaft, avoiding the return and transportation of large rotors, reducing the maintenance cost and time of the shaft. The device has a simple and portable structure, making it easy to carry out on-site repair operations.

Claims

1. A steel belt type external cylindrical grinding device, characterized in that, Includes a clamping mechanism, in which a steel strip (2) is clamped, and a grinding unit is wrapped inside the steel strip (2). An adjustment mechanism is arranged opposite to the clamping mechanism. The steel strip (2) is an open-loop steel strip, and one end of the steel strip (2) is clamped in the middle of the adjustment mechanism. The grinding unit includes a roller (11), which is connected to an electric spindle sleeve (10) by screws (15). An electric spindle (14) is installed inside the electric spindle sleeve (10). A grinding wheel (12) is connected to the end of the electric spindle (14) away from the electric spindle sleeve (10). The outer walls of the roller (11) and the electric spindle sleeve (10) are wrapped in a steel strip (2). The clamping mechanism includes two tensioning shafts (1) arranged in parallel to each other. The two tensioning shafts (1) are connected by two screws (3) arranged in parallel to each other. The shafts of the two screws (3) are connected to nuts (8). The shafts of the two tensioning shafts (1) are sleeved with sleeves (9) through second snap rings (71). The steel strip (2) is clamped between the two sleeves (9). The two ends of the two tensioning shafts (1) are connected to rubber wheels (4) through third snap rings (72). The two tensioning shafts (1) are arranged opposite to the adjustment mechanism.

2. The steel belt type external cylindrical grinding device according to claim 1, characterized in that, A dustproof plate (13) is connected to the electric spindle (14) via a first snap ring (16), and the dustproof plate (13) is disposed between the grinding wheel (12) and the electric spindle sleeve (10).

3. The steel belt type external cylindrical grinding device according to claim 1, characterized in that, One of the tensioning shafts (1) has handles (6) connected to both ends.

4. The steel belt type external cylindrical grinding device according to claim 1, characterized in that, The adjustment mechanism includes two clamping shaft positioning blocks (18) arranged opposite to each other. The clamping shaft positioning blocks (18) have two annular holes (23). Two clamping shafts (17) arranged parallel to each other are connected between the opposite annular holes (23). The clamping shafts (17) are arranged opposite to the tensioning shaft (1). The end of the steel strip (2) is clamped between the clamping shafts (17). The ends of the two clamping shafts (17) at the bottom layer are connected to gears (19). The two gears (19) mesh with each other. The end of one of the clamping shafts (17) at the bottom layer is connected to a rotating handle (20). The clamping shaft (17) at the top layer is in close contact with the clamping shaft (17) at the bottom layer.

5. The steel belt type external cylindrical grinding device according to claim 4, characterized in that, The clamping shaft (17) and the annular hole (23) are connected by a fourth snap ring (21).

6. The steel belt type external cylindrical grinding device according to claim 4, characterized in that, The sidewall of the clamping shaft positioning block (18) has two pairs of through holes (24) respectively. The through holes (24) are opened at both ends of the annular hole (23). The through holes (24) are connected to the set screws (22), and the set screws (22) are in contact with the clamping shaft (17).

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