Self-pumping liquid adding type runner plate grinding machine

Abstract

The utility model belongs to the technical field of maintenance of thrust bearings of water-turbine generator sets, and particularly provides a self-pumping liquid adding type runner plate grinding machine which comprises a supporting base, the supporting base is used for supporting a thrust block runner plate, a driving mechanism is arranged in the center of the supporting base, and the driving end of the driving mechanism is connected with a rotating supporting arm. Grinding discs are arranged at the two ends of the rotary supporting arm, joint ball bearings are installed on the grinding discs, and connecting rods of the joint ball bearings are connected with the ends of the rotary supporting arm through connecting plates. According to the equipment, forward grinding is carried out on the thrust collar runner plate, the problem that grinding liquid is difficult to adhere to a grinding surface is solved, meanwhile, the grinding flatness can be guaranteed, automatic adding and uniform mixing of the grinding liquid are achieved, manual operation is reduced, and the grinding efficiency and quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of overhaul of thrust bearings of hydro-generator units, and particularly relates to a self-pumping liquid-adding type mirror plate grinding machine. Background Art

[0002] With the long-term operation of hydro-generator units, the problem of mirror plate wear has gradually become prominent, posing a potential threat to its safe and stable operation.

[0003] Traditional grinding devices have many deficiencies when dealing with mirror plates of various types of units. For example, the current mirror plate grinding method mostly uses the method of grinding with the mirror surface of the mirror plate facing downwards and in reverse. Therefore, the levelness and elevation of the support device, the levelness of the grinding disc, the perpendicularity of the driving rotating shaft, and the operating pressure of the hydraulic system will greatly affect the flatness of the mirror plate grinding, making it difficult to ensure the standardization of the overhaul process. Moreover, under the working condition of reverse grinding of the mirror plate, the chromium sesquioxide grinding fluid diluted with kerosene is difficult to uniformly adhere to the surface of the mirror plate, and it is necessary to manually check the mirror surface frequently and add the grinding fluid, making it difficult to achieve a relatively stable grinding effect. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a self-pumping liquid-adding type mirror plate grinding machine, which conducts forward grinding on the thrust head mirror plate, solves the problem that the grinding fluid is difficult to adhere to the grinding surface, and can ensure the flatness of grinding at the same time.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a self-pumping liquid-adding type mirror plate grinding machine, including a support base for supporting the thrust head mirror plate. A driving mechanism is arranged at the center of the support base, and the driving end of the driving mechanism is connected with a rotating arm. Grinding discs are arranged at both ends of the rotating arm. A spherical joint bearing is installed on the grinding disc, and the connecting rod of the spherical joint bearing is connected with the end of the rotating arm through a connecting plate.

[0006] In a preferred solution, a waste liquid recovery tray is arranged on the support base, and the thrust head mirror plate is placed on the waste liquid recovery tray.

[0007] In a preferred solution, the driving mechanism is a hollow shaft hydraulic motor. A connecting seat connected with the rotating arm is arranged on the rotating shaft of the hollow shaft hydraulic motor. A liquid supply pipe is arranged inside the rotating shaft of the hollow shaft hydraulic motor. The liquid supply pipe is connected with a preparation tank through a delivery pump. A liquid collection tank and a flow channel communicated with the liquid collection tank are arranged inside the rotating arm. A vertical pipe is arranged inside the liquid collection tank. The liquid supply pipe passes through the vertical pipe and is provided with a nozzle at the upper end. A liquid discharge channel corresponding to the discharge port of the flow channel is arranged inside the spherical joint bearing, and a liquid discharge hole corresponding to the liquid discharge channel is arranged on the grinding disc.

[0008] In a preferred solution, a diversion groove is arranged at the bottom of the grinding disc.

[0009] In a preferred embodiment, the diversion groove is a spiral structure centered on the liquid discharge hole.

[0010] In a preferred embodiment, the top of the preparation tank is provided with a feeding port and a liquid adding port, and a filter is provided at the liquid discharge port where the preparation tank is connected to the liquid supply pipe.

[0011] In a preferred embodiment, the inner wall of the liquid collection tank is provided with a spiral liquid guide groove.

[0012] A self-pumping liquid adding type mirror plate grinding machine provided by the present utility model has the following beneficial effects:

[0013] 1. It realizes the forward grinding of the mirror plate, without considering the problem of grinding liquid dropping during reverse grinding. During the grinding process, the grinding disc can be adaptively adjusted in angle to ensure the fitting degree with the mirror plate. At the same time, the grinding disc will have a self-rotation phenomenon during the rotation of the rotating arm, which can improve the grinding effect.

[0014] 2. It realizes the automatic addition and uniform mixing of the grinding liquid, reduces manual operation, and improves the grinding efficiency and quality.

[0015] 3. The grinding liquid obtains energy under the centrifugal force and gravity of the rotating arm through a special flow channel design, can flow automatically to the surface of the mirror plate, and has excellent diversion performance through a specially designed grinding disc, thereby achieving excellent grinding effects.

[0016] 4. It can be applied to the construction of similar operations in the hydropower and related industries, and has good versatility and significant industry promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a front view of the present utility model;

[0020] Figure 3 is a top view of the present utility model;

[0021] Figure 4 is a schematic diagram of the connection structure between the grinding disc and the spherical joint bearing;

[0022] Figure 5 is a front view of the connection structure between the grinding disc and the spherical joint bearing;

[0023] Figure 6 is Figure 5 a cross-sectional view taken along A-A;

[0024] Figure 7Is the upward view of the grinding disc;

[0025] Figure 8 Is the schematic diagram of the conveying structure of the grinding fluid;

[0026] Figure 9 Is Figure 8 The detailed structure diagram at position B in

[0027] Figure 10 Is the schematic diagram of the structure of the preparation tank;

[0028] In the figure: support base 1, thrust head mirror plate 2, drive mechanism 3, rotating support arm 4, liquid collection tank 401, flow channel 402, vertical pipe 403, spiral liquid guide groove 404, grinding disc 5, liquid discharge hole 501, diversion groove 502, spherical joint bearing 6, connecting rod 601, liquid discharge channel 602, connecting plate 603, preparation tank 7, feeding port 701, liquid adding port 702, filter 703, waste liquid recovery tray 8, connecting seat 9, liquid supply pipe 10, transfer pump 11, spray head 12. Specific implementation mode

[0029] Example 1:

[0030] As Figures 1 - 5 Shown, a self-pumping liquid adding type mirror plate grinding machine, including a support base 1, the support base 1 is used to support the thrust head mirror plate 2, and a plurality of adjusting legs are arranged at the bottom of the support base 1 to facilitate the adjustment of the height and levelness of the support base 1.

[0031] A drive mechanism 3 is provided at the center of the support base 1, and the drive end of the drive mechanism 3 is connected to the rotating support arm 4. The drive mechanism 3 can be optionally a drive motor or a hydraulic motor. In this embodiment, the drive mechanism 3 is a hollow shaft hydraulic motor, which is convenient for laying the liquid supply pipe 10 and is driven by a hydraulic pump station.

[0032] The two ends of the rotating support arm 4 are provided with grinding discs 5, a spherical joint bearing 6 is installed on the grinding disc 5, and the connecting rod 601 of the spherical joint bearing 6 is connected to the end of the rotating support arm 4 through a connecting plate 603. By setting the spherical joint bearing 6, it is convenient to adjust the angle of the grinding disc 5 so that it can be closely attached to the thrust head mirror plate 2, and at the same time, the grinding disc 5 can rotate by a certain amount to improve the grinding effect. In specific implementation, the grinding disc is integrally formed by CNC of 6061 high-strength aluminum alloy, which improves its grinding performance and service life.

[0033] Preferably, a waste liquid recovery tray 8 is provided on the support base 1, and the thrust head mirror plate 2 is placed on the waste liquid recovery tray 8. The waste liquid recovery tray 8 is placed on the support base 1 to recover the waste liquid generated during the grinding of the mirror plate.

[0034] During specific use, after turning the thrust head mirror plate over, a lifting beam is installed by means of the lifting hole on the thrust head, and the thrust head mirror plate 2 is lifted onto the support base 1 and the waste liquid recovery tray 8, with the mirror surface of the mirror plate facing upward. The driving mechanism 3 drives the rotating arm 4 to drive the grinding disc 5 to rotate, achieving forward grinding of the mirror plate, without the need to consider the problem of grinding liquid dropping during reverse grinding.

[0035] Embodiment 2:

[0036] Different from Embodiment 1, as Figures 6 - 10 shown, the driving mechanism 3 is a hollow shaft hydraulic motor. A connecting seat 9 connected to the rotating arm 4 is provided on the rotating shaft of the hollow shaft hydraulic motor. A liquid supply pipe 10 is passed through the rotating shaft of the hollow shaft hydraulic motor. The liquid supply pipe 10 is connected to the preparation tank 7 through a delivery pump 11. A liquid collecting tank 401 and a flow channel 402 communicating with the liquid collecting tank 401 are provided in the rotating arm 4. A vertical pipe 403 is provided in the liquid collecting tank 401. The liquid supply pipe 10 passes through the vertical pipe 403 and a spray head 12 is provided at the upper end. By providing the vertical pipe 403, it is beneficial to the installation of the liquid supply pipe 10 and at the same time prevents the grinding liquid in the liquid collecting tank 401 from leaking from the installation position of the liquid supply pipe 10. A liquid discharge channel 602 corresponding to the discharge port of the flow channel 402 is provided in the spherical joint bearing 6. A liquid discharge hole 501 corresponding to the liquid discharge channel 602 is provided on the grinding disc 5.

[0037] In this embodiment, as Figure 10 shown, a feeding port 701 and a liquid adding port 702 are provided at the top of the preparation tank 7. A filter 703 is provided at the liquid discharge port where the preparation tank 7 is connected to the liquid supply pipe 10. The preparation tank 7 is used for the preparation of the grinding liquid. During specific use, a stirrer is also provided in the preparation tank 7 to facilitate the stirring and mixing of the grinding liquid.

[0038] The grinding liquid in the preparation tank 7 is transported to the liquid collecting tank 401 through the delivery pump 11 and sprayed out from the spray head, and enters between the grinding disc 5 and the thrust head mirror plate 2 along the flow channel 402, the liquid discharge channel 602 and the liquid discharge hole 501, realizing the addition of the grinding liquid during the grinding process.

[0039] Preferably, a diversion groove 502 is provided at the bottom of the grinding disc 5. The diversion groove 502 is a spiral structure centered on the liquid discharge hole 501. By providing the diversion groove 502, it is beneficial to guide the grinding liquid onto the mirror plate.

[0040] Preferably, a spiral liquid guiding groove 404 is provided on the inner wall of the liquid collecting tank 401, which can prevent the liquid from climbing along the wall and guide the grinding liquid to the flow channel 402.

[0041] The working principle of this device is:

[0042] The driving mechanism 3 drives the rotary support arm 4 to rotate, synchronously driving the grinding disc 5 to move in a circular motion to grind the thrust head mirror plate 2 placed on the support base 1. During the grinding process, the delivery pump 11 delivers the grinding fluid to the liquid collecting tank 401 for replenishing the grinding fluid. After the grinding fluid is ejected, under the guiding action of the spiral liquid guiding groove 404, the centrifugal force of the rotation of the rotary support arm 4, and the action of the self-weight of the grinding fluid, it obtains kinetic energy and enters the flow channel 402 of the rotary support arm 4, forming a certain flow rate and pressure. Finally, it flows out from the spherical joint bearing 6 on the upper side of the grinding disc 5, forming an oil cavity inside the bearing to provide a certain oil film lubrication for the ball head bearing, and finally flowing out from the liquid discharge hole 501 of the grinding disc 5. The grinding disc will have a self-rotation phenomenon during the rotation process of the rotary support arm 4, and the grinding fluid will finally be tangentially thrown out along the liquid guiding groove 502 of the grinding disc 5, forming a uniform oil film on the surface of the thrust head mirror plate 2.

[0043] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A self-pumping liquid-adding mirror plate grinding machine, characterized in that: The invention comprises a support base (1), the support base (1) being used to support a thrust head mirror plate (2), a driving mechanism (3) being provided at the center of the support base (1), a driving end of the driving mechanism (3) being connected to a rotating support arm (4), grinding discs (5) being provided at both ends of the rotating support arm (4), a joint ball bearing (6) being mounted on the grinding disc (5), and a connecting rod (601) of the joint ball bearing (6) being connected to the end of the rotating support arm (4) via a connecting plate (603).

2. The self-pumping liquid-adding mirror plate grinding machine according to claim 1, characterized in that: A waste liquid recovery tray (8) is provided on the support base (1), and the thrust head mirror plate (2) is placed on the waste liquid recovery tray (8).

3. The self-pumping liquid-adding mirror plate grinding machine according to claim 1, characterized in that: The driving mechanism (3) is a hollow shaft hydraulic motor. A connecting seat (9) connected to the rotating arm (4) is provided on the rotating shaft of the hollow shaft hydraulic motor. A liquid supply pipe (10) is passed through the rotating shaft of the hollow shaft hydraulic motor. The liquid supply pipe (10) is connected to the preparation tank (7) through a delivery pump (11). A liquid collecting tank (401) and a flow channel (402) communicating with the liquid collecting tank (401) are provided in the rotating arm (4). A vertical pipe (403) is provided in the liquid collecting tank (401). The liquid supply pipe (10) passes through the vertical pipe (403) and is provided with a nozzle (12) at the upper end. A liquid discharge channel (602) corresponding to the discharge outlet of the flow channel (402) is provided in the joint ball bearing (6). A liquid discharge hole (501) corresponding to the liquid discharge channel (602) is provided on the grinding disc (5).

4. The self-pumping liquid-adding mirror plate grinding machine according to claim 3, characterized in that: A guide groove (502) is provided at the bottom of the grinding disc (5).

5. The self-pumping liquid-adding mirror plate grinding machine according to claim 4, characterized in that: The guide groove (502) is a spiral structure with the drainage hole (501) as the center.

6. The self-pumping liquid-adding mirror plate grinding machine according to claim 3, characterized in that: The top of the preparation tank (7) is provided with a feeding port (701) and a liquid adding port (702), and the liquid discharge port connected to the preparation tank (7) and the liquid supply pipe (10) is provided with a filter (703).

7. The self-pumping liquid-adding mirror plate grinding machine according to claim 3, characterized in that: The inner wall of the liquid collecting tank (401) is provided with a spiral liquid guiding groove (404).

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