Main shaft outer circle grinding machine

Abstract

The utility model relates to the field of main shaft grinding, and discloses a main shaft outer circle grinding machine which comprises a fixing frame (1), an avoiding hole (20) is formed in the fixing frame (1), an annular track (2) is installed on the fixing frame (1) and arranged around a main shaft (3), an annular track sliding block (5) is installed on the annular track (2), and an installation frame (4) parallel to the axis of the main shaft (3) is arranged on the annular track sliding block (5). The grinding device further comprises a grinding mechanism (6), the grinding mechanism (6) is installed on the installation frame (4), the grinding mechanism (6) and the axis of the main shaft (3) are arranged in parallel, and the grinding face of a grinding impeller of the grinding mechanism (6) can be attached to the side face of the main shaft (3). The polishing mechanism has the advantages of being reliable in work, low in cost, convenient to assemble and the like.

Description

Technical Field

[0001] This utility model relates to the field of shaft grinding, and more particularly to a spindle outer diameter grinding machine. Background Technology

[0002] CN115289128A discloses a hydroelectric turbine main shaft and its processing technology. Hydroelectric generator sets and large pumping units often use packing seals for their main shaft seals. With this structure, after prolonged operation, the anti-wear ring fitted on the main shaft will wear to varying degrees, affecting the sealing effect and requiring corresponding anti-wear treatment. Conventional Solution 1: When the wear is scattered and the wear is small, local welding repair followed by manual grinding can be used. However, this solution is highly dependent on individual skill in ensuring the roundness, concentricity, and runout tolerances of the main shaft's anti-wear plate, resulting in poor grinding stability, unreliable repair technology, and a less than ideal sealing effect. Conventional Solution 2: Replace the anti-wear ring. However, this solution requires disassembling and reassembling the runner and tailrace pipe, which is unsatisfactory in terms of maintenance time and financial resources, and also affects operational efficiency. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a spindle external cylindrical grinding machine.

[0004] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0005] A spindle external cylindrical grinding machine includes a fixed frame with clearance holes, an annular track mounted on the fixed frame, the annular track being arranged around the spindle, an annular track slider mounted on the annular track, and a mounting bracket parallel to the spindle axis on the annular track slider. It also includes a grinding mechanism mounted on the mounting bracket, the grinding mechanism being arranged parallel to the spindle axis, and the grinding impeller of the grinding mechanism having a grinding surface that can fit against the side of the spindle.

[0006] Preferably, the mounting bracket is fixedly mounted on the sliding track slider. The mounting bracket includes a linear track, which is parallel to the main shaft axis. A linear slider is mounted on the linear track, and a grinding mechanism is fixedly mounted on the linear slider. The grinding mechanism is located on the lower side of the linear track.

[0007] Preferably, a control handle is also fixedly installed on the linear slider. The control handle can drive the linear slider to slide along the linear track, or drive the linear track to slide circumferentially along the annular track.

[0008] Preferably, the grinding mechanism includes an electric direct grinder and a grinding wheel installed at the end of the electric direct grinder, which is mounted on a linear slider by a fixed lifting ring.

[0009] Preferably, the device also includes a first locking bolt, which is fixedly connected to the annular track slider through a threaded hole provided on the annular track slider; the threaded hole is a through hole, through which the first locking bolt can pass and abut against the annular track.

[0010] Preferably, a second locking bolt is also included, which is mounted on the linear slider and can pass through the linear slider to abut against the linear track.

[0011] Preferably, the linear track and the circular track are provided with scale lines to measure the current position of the linear slider.

[0012] Preferably, self-lubricating graphite sleeves are embedded on the sliding surfaces of the circular track and the linear track.

[0013] As a preferred option, the circular track is formed by splicing together multiple segments of arc-shaped track.

[0014] Compared with existing technologies, this solution has the following advantages: it is low in cost, simple to assemble on site, and the grinding process is controllable, with the grinding precision controllable in real time according to needs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the device.

[0016] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0017] Figure 3 yes Figure 1 A magnified view of a portion of the image.

[0018] The technical names of the reference numerals in the figure are as follows: 1—fixed frame, 2—circular track, 3—main shaft, 4—mounting frame, 5—circular track slider, 6—grinding mechanism, 7—linear track, 8—linear slider, 9—operating handle, 10—electric direct grinder, 11—grinding wheel, 12—first locking bolt, 13—scale line, 14—second locking bolt, 15—fixed lifting ring. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] Example 1

[0021] The spindle 3 external cylindrical grinding machine includes a fixed frame 1 with a clearance hole 20 for the spindle 3 to pass through. The entire fixed frame 1 can be fitted onto the spindle 3, thus saving space. A ring track 2 is mounted on the fixed frame 1, surrounding the spindle 3. A ring track slider 5 is mounted on the ring track 2, and a mounting bracket 4 parallel to the axis of the spindle 3 is mounted on the ring track slider 5. The machine also includes a grinding mechanism 6, mounted on the mounting bracket 4, parallel to the axis of the spindle 3. The grinding impeller of the grinding mechanism 6 can fit against the side of the spindle 3. The grinding mechanism 6 can be assembled on-site, is low-cost, and can adapt to different sizes of spindles 3. The ring track slider 5 has a segmented structure, making manufacturing simpler and easier to adjust according to actual needs. Furthermore, the grinding mechanism and impeller of the grinding mechanism 6 are existing products that can be directly installed.

[0022] In this design, the mounting bracket 4 is fixedly mounted on the sliding track slider. The mounting bracket 4 includes a linear track 7, which is parallel to the axis of the main shaft 3. A linear slider 8 is mounted on the linear track 7, and a grinding mechanism 6 is fixedly mounted on the linear slider 8. The grinding mechanism 6 is located below the linear track 7. Both the linear track 7 and the annular track can adopt a multi-track design to provide greater support for the entire track.

[0023] In this embodiment, a control handle 9 is also fixedly installed on the linear slider 8. The control handle 9 can drive the linear slider 8 to slide along the linear track 7, and can also drive the linear track 7 to slide circumferentially along the annular track 2. When circumferential sliding is required, it is only necessary to apply a circumferential force to the handle.

[0024] In this embodiment, the grinding mechanism 6 includes an electric direct grinder 10 and a grinding wheel 11 installed at the end of the electric direct grinder 10. The electric direct grinder 10 is mounted on the linear slider 8 via a fixed lifting ring 15. Specifically, the grinding impeller is an 11T type grinding impeller, and the axis of the grinding impeller is parallel to the axis of the direct grinder.

[0025] In this embodiment, a first locking bolt 12 is also included. The first locking bolt 12 is fixedly connected to the annular track slider 5 through a threaded hole formed on the annular track slider 5. The threaded hole is a through hole, through which the first locking bolt 12 can pass and abut against the annular track 2. The purpose of the locking structure is to fix the position during grinding, ensure the accuracy of the grinding position, and prevent the grinding mechanism 6 from running when not in operation.

[0026] Similarly, a second locking bolt 14 is also included. The second locking bolt 14 is mounted on the linear slider 8 and can pass through the linear slider 8 to abut against the linear track 7. The locking function of the first locking bolt 12 and the second locking bolt 14 is achieved by friction.

[0027] In this embodiment, the linear track 7 and the annular track 2 are provided with scale lines 13 to measure the current position of the linear slider 8. The purpose of setting the scale is to facilitate the operator in locating the current grinding position and ensuring grinding accuracy. At the same time, it is obvious that the annular track 2 and the main shaft 3 are coaxial.

[0028] To reduce friction during sliding, self-lubricating graphite sleeves are embedded on the sliding surfaces of the annular track 2 and the linear track 7. The annular track 2 is formed by splicing together multiple arc-shaped tracks.

[0029] Example 2

[0030] The difference between this embodiment and Embodiment 1 is that the circular track is a 4-segment track.

[0031] Example 3

[0032] The difference between this embodiment and embodiment 1 is that the first locking bolt 12 is locked onto the fixing frame 1, thereby providing support for the mounting frame 4.

Claims

1. A spindle external cylindrical grinding machine, characterized in that: The system includes a fixed frame (1), which has clearance holes (20) and a ring track (2) installed on the fixed frame (1). The ring track (2) is arranged around the main shaft (3). A ring track slider (5) is installed on the ring track (2). A mounting frame (4) parallel to the axis of the main shaft (3) is provided on the ring track slider (5). The system also includes a grinding mechanism (6), which is installed on the mounting frame (4). The grinding mechanism (6) is arranged parallel to the axis of the main shaft (3). The grinding surface of the grinding impeller of the grinding mechanism (6) can fit against the side of the main shaft (3). The mounting bracket (4) is fixedly installed on the sliding track slider. The mounting bracket (4) includes a linear track (7), which is parallel to the axis of the main shaft (3). A linear slider (8) is installed on the linear track (7). The grinding mechanism (6) is fixedly installed on the linear slider (8). The grinding mechanism (6) is located on the lower side of the linear track (7). It also includes a first locking bolt (12), which is fixedly connected to the annular track slider (5) through a threaded hole opened on the annular track slider (5); the threaded hole is a through hole, and the first locking bolt (12) can pass through the threaded hole and abut against the annular track (2); It also includes a second locking bolt (14), which is mounted on the linear slider (8) and can pass through the linear slider (8) to abut against the linear track (7).

2. The spindle external cylindrical grinding machine according to claim 1, characterized in that: A control handle (9) is also fixedly installed on the linear slider (8). The control handle (9) can drive the linear slider (8) to slide along the linear track (7) or drive the linear track (7) to slide circumferentially along the ring track (2).

3. The spindle external cylindrical grinding machine according to claim 1, characterized in that: The grinding mechanism (6) includes an electric direct grinder (10) and a grinding wheel (11) installed at the end of the electric direct grinder (10). The electric direct grinder (10) is installed on the linear slider (8) by a fixed lifting ring (15).

4. The spindle external cylindrical grinding machine according to claim 1, characterized in that: The linear track (7) and the circular track (2) are equipped with scale lines (13) to measure the current position of the linear slider (8).

5. The spindle external cylindrical grinding machine according to claim 1, characterized in that: Self-lubricating graphite sleeves are embedded on the sliding surfaces of the circular track (2) and the linear track (7).

6. The spindle external cylindrical grinding machine according to claim 1, characterized in that: The circular track (2) is formed by splicing together multiple arc-shaped tracks.

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