Shaft neck grinding device

Abstract

The utility model belongs to the technical field of journal polishing and repairing, and discloses a journal polishing device which comprises a base, a portal frame, a polishing ring and a driving mechanism. The base is fixed on a mounting surface; the portal frame comprises a cross beam and stand columns which are movably connected with the base. The polishing ring is connected to a cross beam of the portal frame and used for polishing the shaft neck, the polishing ring can be kept in the same axial direction with the shaft neck and abut against the circumferential direction of the shaft neck, and the stand column can move in the axial direction of the polishing ring; the driving mechanism is arranged on the portal frame and can drive the polishing ring to rotate. When an operator uses the shaft neck polishing device, the circumferential polishing of the shaft neck can be realized only by enabling the polishing ring to abut against the circumferential direction of the shaft neck and starting the driving mechanism, then the position of the polishing ring in the axial direction of the shaft neck can be adjusted by moving the stand column, the shaft neck is completely polished, and compared with manual abrasive paper polishing, the polishing efficiency is greatly improved. By means of the device, the journal can be ground more conveniently and rapidly, it can be guaranteed that the journal is ground in all directions, and omission is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft neck grinding and repairing, in particular to a shaft neck grinding device. Background Art

[0002] The journal, the part of the shaft where the bearing is mounted, is a section of the shaft with the same diameter, or a cylindrical surface with different diameters but a uniform, continuous outer surface. After a turbine has been operating for a period of time, the journal near the turbine bearing is susceptible to wear and corrosion. Numerous corrosion spots and uneven surfaces can form on the journal, which can easily cause frictional heat generation in the bearing. This elevated temperature can affect the bearing's function and render it unusable. Therefore, it must be polished to a smooth surface.

[0003] In the existing technology, manual grinding is usually done with handheld sandpaper. However, the outer diameter of the shaft is relatively large and the hardness is strong, so the grinding is very slow. When the maintenance cycle of the turbine is very tight, it will affect the maintenance progress. At the same time, manual grinding is prone to omissions, resulting in the surface of the shaft neck not being polished or not being polished in place. Utility Model Content

[0004] The purpose of the utility model is to provide a journal grinding device, which can fully grind the journal conveniently and quickly.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A journal grinding device, comprising:

[0007] A base, the base being used to be fixed to a mounting surface;

[0008] A gantry, the gantry comprising a crossbeam and columns, the columns being movably connected to the base;

[0009] A grinding ring connected to the crossbeam of the gantry and used for grinding the journal. The grinding ring can maintain the same axial direction as the journal and abut against the circumference of the journal. The column can move along the axial direction of the grinding ring.

[0010] A driving mechanism is provided on the gantry, and the driving mechanism can drive the grinding ring to rotate.

[0011] Preferably, the column is provided with a rotating rod and a rotating driving member connected to the rotating rod, the rotating rod is provided with a gear on its outer sleeve, and the base is provided with a rack for cooperating with the gear.

[0012] Preferably, the column is slidably connected to the base, one of the column and the base is provided with a sliding protrusion, and the other is provided with a sliding groove, the sliding protrusion extends into the sliding groove and is slidably connected to the sliding groove.

[0013] Preferably, the crossbeam is provided with a mounting seat, a rotation groove is provided in the mounting seat, and the grinding ring is rotatably connected to the rotation groove.

[0014] Preferably, two guide wheels are arranged at intervals on the crossbeam, and the two guide wheels are respectively located on both sides of the mounting seat. The journal grinding device also includes a flexible traction member, the middle section of the flexible traction member is located between the guide wheels, and the two ends of the flexible traction member extend downward through the guide wheels and are respectively connected to the grinding ring.

[0015] Preferably, the driving mechanism is a linear driving mechanism, and an output end of the linear driving mechanism is connected to the flexible traction member.

[0016] Preferably, the distance between the two guide wheels is greater than or equal to the diameter of the grinding ring.

[0017] Preferably, a stop structure is provided between the column and the base to fix or release the column and the base relative to each other.

[0018] Preferably, the inner surface of the grinding ring is provided with sandpaper, and the sandpaper is detachably fixed to the grinding ring.

[0019] Preferably, the grinding ring is provided with a tensioning mechanism to make the grinding ring fit the shaft neck.

[0020] Beneficial effects:

[0021] The utility model provides a journal grinding device, which includes a base, a gantry, a grinding ring, and a driving mechanism. The base is used to be fixed to a mounting surface; the gantry includes a crossbeam and a column, and the column is movably connected to the base; the grinding ring is connected to the crossbeam of the gantry and is used to grind the journal. The grinding ring can maintain the same axial direction as the journal and abut against the circumference of the journal, and the column can move along the axial direction of the grinding ring; the driving structure is arranged on the gantry, and the driving mechanism can drive the grinding ring to rotate. When an operator uses the above-mentioned journal grinding device, he only needs to make the grinding ring abut against the circumference of the journal and start the driving mechanism to grind the circumference of the journal. Then, by moving the column, the position of the grinding ring in the axial direction of the journal can be adjusted to completely grind the journal. The gantry can ensure the stability of the grinding ring when moving, avoiding shaking that affects the grinding effect of the journal. Compared with manual grinding, this device can make journal grinding more convenient and ensure that the journal is fully polished to avoid omissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an overall schematic diagram of the journal grinding device provided by the utility model;

[0023] Figure 2This is a side view of the journal grinding device provided by the utility model;

[0024] Figure 3 It is a schematic diagram of the tensioning mechanism of the journal grinding device provided by the utility model.

[0025] In the figure: 1. Base; 2. Stop handle; 3. Column; 4. Electric push rod; 5. Flexible traction member; 6. Guide wheel; 7. Mounting seat; 8. Tensioning mechanism; 9. Grinding ring; 10. Gear; 11. Rack; 12. Hand crank; 13. Sliding protrusion; 14. Fixed seat; 15. Spring; 16. Adjustment hole. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0027] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0030] like Figure 1-Figure 3 As shown, this embodiment provides a journal grinding device, which includes a base 1, a gantry, a grinding ring 9 and a driving mechanism. The base 1 is used to be fixed to a mounting surface, which can be the ground or other surfaces. The gantry includes a crossbeam and a column 3, and the column 3 is movably connected to the base 1. The grinding ring 9 is connected to the crossbeam of the gantry and is used to grind the journal. The grinding ring 9 can abut against the circumference of the journal, and the column 3 can move along the axial direction of the grinding ring 9; when the column 3 moves, it can drive the gantry as a whole to move, and then the grinding ring 9 also moves to adjust the grinding position. It can be understood that when the grinding ring 9 is grinding, the neck shaft and the grinding ring 9 are coaxial, and the movement of the column 3 along its axial direction can drive the grinding ring 9 to move along the axial direction of the journal to perform all-round grinding of the journal. The driving mechanism can drive the grinding ring 9 to rotate. The grinding ring 9 is in circumferential contact with the journal. When the surface of the grinding ring 9 is rough, the rotation of the grinding ring 9 can cause the journal surface to receive sufficient friction force, thereby removing defects on the journal surface.

[0031] Therefore, when the operator uses the above-mentioned journal grinding device, he only needs to make the grinding ring abut against the circumference of the journal and start the driving mechanism to achieve the circumferential grinding of the journal, and then adjust the axial position of the grinding ring on the journal by moving the column to completely grind the journal. The gantry can ensure the stability of the grinding ring when moving to avoid shaking that affects the grinding effect of the journal. Compared with manual grinding, this device can make journal grinding more convenient and can also ensure that the journal is ground in all directions to avoid omissions.

[0032] Specifically, in this embodiment, the column 3 is equipped with a rotating rod and a rotary drive connected to the rotating rod. A gear 10 is disposed on the outer surface of the rotating rod, and a rack 11 is mounted on the base 1 to engage with the gear 10. Rotation of the rotating rod drives the gear 10, and the gear 10 and rack 11 cooperate to achieve relative movement between the column 3 and the base 1, and thus between the gantry and the base 1. When the grinding ring 9 grinds the journal, the operator can change the grinding position of the grinding ring 9 outside the journal by controlling the rotation direction and speed of the rotary drive. Furthermore, the rotating rod is inserted into the column 3. A hand crank 12 is disposed at one end of the rotating rod, serving as the rotary drive, and the gear 10 is disposed at the other end. The operator can manually operate the hand crank 12 to adjust the grinding position of the grinding ring 9. In some other embodiments, the hand crank 12 may be omitted, and a rotary motor or other rotary drive structure may be provided instead. The rotating rod is connected to the output end of the rotary drive structure, but this embodiment is not limited to this.

[0033] Specifically, in this embodiment, the column 3 is slidably connected to the base 1. One of the column 3 and the base 1 is provided with a sliding protrusion 13, and the other is provided with a chute. The sliding protrusion 13 extends into the chute and slidably connects with the chute. Furthermore, the sliding protrusion 13 is provided on the top of the base 1, and the chute is provided on the bottom of the column 3. When the sliding protrusion 13 and the chute slide relative to each other, the column 3 and the base 1 also slide relative to each other. In addition, the cross-sectional area of ​​the notch of the chute is smaller than the maximum cross-sectional area of ​​the sliding protrusion 13 within the chute, ensuring that the sliding protrusion 13 will not fall out of the chute during the sliding process, and the column 3 will not separate from the base 1, affecting the polishing process.

[0034] Specifically, in this embodiment, the crossbeam is provided with a mounting seat 7, which has a rotation groove disposed therein, and a grinding ring 9 is rotatably connected to the rotation groove. When the grinding ring 9 is grinding the shaft journal, the mounting seat 7 serves to position and secure the grinding ring 9, preventing vibration that could affect the grinding effect. Furthermore, the cross-sectional area of ​​the notch opening is smaller than that of the bottom of the groove. The interior of the notch serves to position the grinding ring 9, maintaining its rotational connection with the rotation groove and preventing it from dislodging.

[0035] Specifically, in this embodiment, two guide wheels 6 are spaced apart on the crossbeam, one located on either side of a mounting seat 7. The journal grinding device also includes a flexible traction member 5, the middle section of which is located between the guide wheels 6. Both ends of the flexible traction member 5 extend downward through the guide wheels 6 and are respectively connected to the grinding ring 9. In other words, the flexible traction member 5 is an entire flexible structure. The provision of the two guide wheels 6 allows the two ends of a single flexible traction member 5 to extend downward under the action of gravity and connect to the grinding ring 9. Furthermore, the flexible traction member 5 is a non-elastic structure, allowing it to maintain its original length under tension. When tension is applied to the flexible traction member 5, one end of the flexible traction member 5 applies tension to the grinding ring 9, driving the grinding ring 9 to rotate. The guide wheels 6 are rotatably connected to the crossbeam, reducing the friction experienced by the flexible traction member 5 during movement and improving the efficiency of controlling the grinding ring 9. Furthermore, both ends of the flexible traction member 5 are fixed to the lower portion of the grinding ring 9 via fixing seats 14, so as to prevent the flexible traction member 5 from becoming aligned with the diameter of the grinding ring 9 after being pulled a certain distance, thereby preventing the flexible traction member 5 from being aligned with the diameter of the grinding ring 9 and causing a dead point where the traction member 5 cannot be pulled further. The operator can provide a driving force to the flexible traction member 5 in a straight line to achieve the reciprocating rotation of the grinding ring 9 for journal grinding.

[0036] Furthermore, in this embodiment, the driving mechanism is a linear driving mechanism, and the output end of the linear driving mechanism is connected to the flexible traction member 5. Specifically, the guide wheels 6 are arranged at intervals along the length direction of the beam, and the flexible traction member 5 is a traction rope. The portion of the traction rope between the guide wheels 6 is also arranged at intervals along the length direction of the beam, and the axial direction of the grinding ring 9 is perpendicular to the length direction of the beam. The linear driving mechanism is an electric push rod 4, which is also arranged on the beam. The output end of the electric push rod 4 can drive the traction rope to move back and forth along the length direction of the beam. Figure 1 Taking the direction in the figure as an example, when the electric push rod 4 drives the traction rope to move to the right, the left end of the traction rope can provide an upward pulling force to the grinding ring 9, driving the grinding ring 9 to rotate clockwise. When the electric push rod 4 drives the traction rope to move to the left, the right end of the traction rope can provide an upward pulling force to the grinding ring 9, driving the grinding ring 9 to rotate counterclockwise. Furthermore, the mounting seat 7 is located in the middle of the two guide wheels 6. In the initial state, the connection between the electric push rod 4 and the traction rope is located directly above the mounting seat 7. The two sides of the traction rope are fixed to the grinding ring 9 through the fixing seat 14, and the fixing points on both sides are at the same horizontal height. The motion trajectory of the electric push rod 4 when moving is symmetrical about the mounting seat 7. At this time, when the grinding ring 9 rotates, it can evenly grind different positions around the shaft neck. In some other embodiments, the electric push rod 4 can also be replaced with a cylinder or other linear drive mechanism, which is not limited in this embodiment. In some other embodiments, a linear drive mechanism may not be provided, but the flexible traction member 5 may be provided as a chain, and teeth that cooperate with the chain are installed on the guide wheel 6. When the guide wheel 6 rotates, the teeth can engage with the chain to cause the grinding ring 9 to rotate.

[0037] Furthermore, in this embodiment, the distance between the two guide wheels 6 is greater than or equal to the diameter of the grinding ring 9. The larger distance between the guide wheels 6 can minimize the contact between the traction rope and the outer peripheral wall of the grinding ring 9, thereby avoiding wear and tear of the traction rope.

[0038] Specifically, in this embodiment, a stop structure is provided between the column 3 and the base 1 to secure or release the column 3 relative to the base 1. The gantry has two columns 3, one of which is equipped with a rotating rod, gear 10, and other structures to enable movement of the gantry. The other column 3 can be provided with a stop handle 2 as a stop structure. Pulling the stop handle 2 to secure the column 3 relative to the base 1 prevents movement of the gantry and allows the grinding ring 9 to grind in a fixed position for a long time. Pulling the stop handle 2 to release the relative fixation between the column 3 and the base 1 allows the gantry to move, driving the grinding ring 9 to move, allowing grinding at different positions of the journal.

[0039] Specifically, in this embodiment, the inner surface of the grinding ring 9 is provided with sandpaper, and the sandpaper is detachably fixed to the grinding ring 9. The rougher the surface of the grinding ring 9, the greater the friction between it and the shaft neck, and the higher the efficiency of grinding and repairing the shaft neck. Therefore, arranging sandpaper on the inner side of the grinding ring 9 can effectively improve the grinding efficiency of the shaft neck. In addition, the sandpaper is arranged in a detachable and fixed manner, so that it can be replaced after the surface of the sandpaper is severely worn. Furthermore, Velcro is provided on the inner side of the grinding ring 9, and the sandpaper is fixed on the Velcro, and the sandpaper is ensured to be flat and without warping when fixed to prevent the sandpaper from falling off during grinding. In some other embodiments, the sandpaper can also be bonded with a colloid, which is not limited in this embodiment.

[0040] Specifically, in this embodiment, the grinding ring 9 is provided with a tensioning mechanism 8 to ensure that the grinding ring 9 is in close contact with the shaft neck. After the shaft neck is worn or corroded, its outer diameter may change to a certain extent. The provision of the tensioning mechanism 8 can adjust the inner diameter of the grinding ring 9 itself, thereby ensuring a better fit between the grinding ring 9 and the shaft neck, and ensuring the grinding effect.

[0041] Furthermore, in this embodiment, the tensioning mechanism 8 includes two connecting members and a spring 15 disposed between the two connecting members. The ends of the two connecting members, facing away from each other, are respectively connected to the grinding ring 9. Each connecting member is provided with an adjustment hole 16, through which a threaded member or other structure can be inserted to secure the connecting member to the grinding ring 9. Changing the positional relationship between the adjustment hole 16 and the threaded member can change the elastic force of the spring 15, thereby changing the fit between the grinding ring 9 and the shaft journal.

[0042] Specifically, in this embodiment, the steps for using the above-mentioned journal grinding equipment are as follows:

[0043] S1: Open the storage device where the journal grinding equipment is stored, pass the lifting belt through the lower part of the beam and lift it up, then place it at the corresponding position of the tile pillow and use screws to fix the base 1 on the tile pillow.

[0044] S2: Set up the power supply circuit and control circuit and check them.

[0045] S3: Stick the sandpaper on the Velcro inside the sanding circle 9, and make sure the sandpaper is flat and not warped.

[0046] S4: Place the journal and put the grinding ring 9 around the journal, and adjust the spring tension of the tensioning mechanism 8.

[0047] S5: Connect the flexible traction member 5 to the grinding ring 9, adjust the flexible traction member 5 to a slightly loose state, and then tighten the movable bolt lock nut to fix the end of the flexible traction member 5 relative to the grinding ring 9.

[0048] S6: Start the electric push rod to rotate the grinding ring 9 to grind the shaft neck, and at the same time shake the hand rocker 12 to realize the axial movement grinding of the grinding ring 9. Stop the machine after the grinding is completed.

[0049] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A journal grinding device, characterized in that: include: A base (1), the base (1) being used to be fixed to a mounting surface; A gantry, the gantry comprising a crossbeam and a column (3), the column (3) being movably connected to the base (1); A grinding ring (9), the grinding ring (9) is connected to the crossbeam of the gantry and is used for grinding the journal. The grinding ring (9) can maintain the same axial direction as the journal and abut against the circumference of the journal. The column (3) can move along the axial direction of the grinding ring (9); A driving mechanism is provided on the gantry, and the driving mechanism can drive the grinding ring (9) to rotate.

2. The journal grinding device according to claim 1, characterized in that: The column (3) is slidably connected to the base (1); one of the column (3) and the base (1) is provided with a sliding protrusion (13), and the other is provided with a sliding groove; the sliding protrusion (13) extends into the sliding groove and is slidably connected to the sliding groove.

3. The journal grinding device according to claim 2, characterized in that: The column (3) is provided with a rotating rod and a rotating driving member connected to the rotating rod, the rotating rod is provided with a gear (10) on its outer sleeve, and the base (1) is provided with a rack (11) for cooperating with the gear (10).

4. The journal grinding device according to claim 1, characterized in that: The crossbeam is provided with a mounting seat (7), a rotation groove is provided in the mounting seat (7), and the grinding ring (9) is rotatably connected to the rotation groove.

5. The journal grinding device according to claim 4, characterized in that: Two guide wheels (6) are arranged on the crossbeam at intervals, and the two guide wheels (6) are respectively located on both sides of the mounting seat (7). The journal grinding device also includes a flexible traction member (5), the middle section of the flexible traction member (5) is located between the guide wheels (6), and the two ends of the flexible traction member (5) extend downward through the guide wheels (6) and are respectively connected to the grinding ring (9).

6. The journal grinding device according to claim 5, characterized in that: The driving mechanism is a linear driving mechanism, and the output end of the linear driving mechanism is connected to the flexible traction member (5).

7. The journal grinding device according to claim 5, characterized in that: The distance between the two guide wheels (6) is greater than or equal to the diameter of the grinding ring (9).

8. The journal grinding device according to any one of claims 1 to 7, characterized in that: A stop structure is provided between the upright post (3) and the base (1) to enable the upright post (3) and the base (1) to be relatively fixed or released from relative fixation.

9. The journal grinding device according to any one of claims 1 to 7, characterized in that: The inner surface of the grinding ring (9) is provided with sandpaper, and the sandpaper is detachably fixed to the grinding ring (9).

10. The journal grinding device according to any one of claims 1 to 7, characterized in that: The grinding ring (9) is provided with a tensioning mechanism (8) so as to make the grinding ring (9) fit the shaft neck.

Images