Axial flow pump lubrication maintenance device

Abstract

The utility model relates to an axial flow pump lubrication maintenance device and belongs to the field of water pump maintenance, an axial flow pump comprises a pump body, a suction chamber is arranged close to the front end of the pump body, a water outlet elbow is arranged at the rear end of the pump body, an impeller and a guide vane are correspondingly arranged in the pump body, an extension part is arranged on the outer wall of the water outlet elbow, a mounting cavity is formed in the end, away from the water outlet elbow, of the extension part, and a bearing is arranged in the mounting cavity; a shaft hole allowing the rotating shaft to penetrate through is formed in the end, close to the water outlet bent pipe, of the water outlet bent pipe, the diameter of the mounting cavity is larger than the aperture of the shaft hole, a transition cavity is formed between the shaft hole and the mounting cavity, lubricating grease is contained in the transition cavity, and the extending part is provided with a channel communicated with the lubricating grease. The lubricating grease can lubricate the rotating shaft and the water outlet elbow when the rotating shaft continuously rotates; meanwhile, the sealing pipe body is arranged and filled with the lubricating grease, the lubricating grease can be supplemented into the transition cavity on line, and the lubricating grease can play a lubricating role and can also play a sealing role.

Description

Technical Field

[0001] The utility model relates to the field of water pump maintenance, in particular to an axial flow pump lubrication maintenance device. Background Art

[0002] Axial-flow pumps rely on the force exerted by the rotating impeller blades on the liquid to transport it along its axis. Axial-flow pumps are typically vertical, with the impeller submerged in water. Fixed guide vanes are located within the pump casing above the impeller to eliminate the liquid's rotational motion, converting it into axial motion and converting the kinetic energy of the rotational motion into pressure energy. The impeller's shaft typically extends from the suction chamber to the exterior of the outlet elbow, where it is connected to an external motor. Consequently, the shaft and the wall of the outlet elbow are connected in a rotating manner. This rotating connection makes this area very susceptible to wear, especially when the impeller's rotational torque is unbalanced, resulting in eccentric rotation. Therefore, to reduce wear, lubrication and maintenance are required between the bearings and the shaft. Utility Model Content

[0003] The current axial flow pump has a rotating connection between the shaft and the wall of the outlet elbow. It is precisely because of this rotating connection that wear is easily caused here, especially when the impeller is unbalanced and eccentrically rotates, which further aggravates the wear here. This application is an axial flow pump lubrication maintenance device that can solve the above problem. The specific technical solution it adopts is:

[0004] A lubrication and maintenance device for an axial flow pump, the axial flow pump includes a pump body, a suction chamber is provided near the front end of the pump body, a water outlet elbow is provided at the rear end, an impeller and a guide vane are provided in the corresponding pump body, an extension portion is provided on the outer wall of the water outlet elbow, the extension portion is provided with a mounting cavity at the end away from the water outlet elbow, a bearing is provided in the mounting cavity, an axial hole is provided at the end near the water outlet elbow for the rotating shaft to pass through, the diameter of the mounting cavity is larger than the aperture of the axial hole, a transition cavity is provided between the axial hole and the mounting cavity, grease is contained in the transition cavity, and the extension portion is provided with a channel connected to the grease.

[0005] Furthermore, the channel is trumpet-shaped with a larger inner diameter near the edge of the extension portion and a smaller inner diameter near the transition cavity.

[0006] Preferably, two channels are provided, and the two channels are symmetrically arranged relative to the center line of the extension portion.

[0007] Preferably, the outer wall of the water outlet elbow is further provided with a sealing tube body, which has a sealing cavity. The entire extension portion is located in the sealing cavity. A sealing cover is detachably provided on the upper end of the sealing tube body, and the rotating shaft extends to the outside of the sealing cover.

[0008] Preferably, the sealing tube body is filled with grease, and the height of the grease is higher than the top end of the extension portion.

[0009] Preferably, a liquid level sensor is further provided in the sealing tube body for detecting the liquid level of the grease.

[0010] The utility model stores grease in the transition cavity by providing an extension portion and cooperating with the internal structure of the extension portion. The grease can lubricate the rotating shaft and the water outlet elbow when the rotating shaft is continuously rotating. At the same time, by providing a sealed tube body and filling the grease inside, the grease can be replenished online into the transition cavity. The grease can play both a lubricating role and a sealing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] In the figure, 1. Suction chamber, 2. Pump body, 3. Discharge elbow, 4. Impeller, 5. Guide vane, 6. Rotating shaft, 7. Extension, 8. Transition chamber, 9. Channel, 10. Bearing, 11. Mounting chamber, 12. Liquid level sensor, 13. Sealing tube body, 14. Sealing chamber, 15. Sealing cover. DETAILED DESCRIPTION

[0013] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0014] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0015] like Figure 1 As shown, a lubrication and maintenance device for an axial flow pump is provided. The axial flow pump includes a pump body 2, a suction chamber 1 is provided near the front end of the pump body 2, and a water outlet elbow 3 is provided at the rear end. An impeller 4 and a guide vane 5 are provided in the corresponding pump body 2, and an extension portion 7 is provided on the outer wall of the water outlet elbow 3. The extension portion 7 is used for the rotating shaft 6 of the impeller 4 to pass through. The extension portion 7 is provided with a mounting cavity 11 at the end away from the water outlet elbow 3, and a bearing 10 is provided in the mounting cavity 11. An end near the water outlet elbow 3 has an axial hole for the rotating shaft 6 to pass through. The diameter of the mounting cavity 11 is larger than the aperture of the axial hole. A transition cavity 8 is provided between the axial hole and the mounting cavity 11, and grease is contained in the transition cavity 8. The extension portion 7 is provided with a channel 9 connected to the grease. Due to the above structure, the transition cavity 8 is a conical shape with a larger upper portion and a smaller lower portion, which is conducive to the grease falling between the rotating shaft 6 and the water outlet elbow 3, thereby better playing the role of lubrication and sealing.

[0016] Furthermore, in order to facilitate the addition of grease into the transition chamber 8, the above-mentioned channel 9 is trumpet-shaped with a larger inner diameter near the edge of the extension portion 7 and a smaller inner diameter near the transition chamber 8. This way, the opening is large and grease is easily added.

[0017] Furthermore, in order to improve the efficiency of adding grease, two channels 9 are provided, and the two channels 9 are symmetrically arranged relative to the center line of the extension portion 7 .

[0018] Furthermore, a sealing tube body 13 is provided on the outer wall of the water outlet elbow 3, and a sealing cavity 14 is provided in the sealing tube body 13. The extension part 7 is located in the sealing cavity 14 as a whole. A sealing cover 15 is detachably provided on the upper end of the sealing tube body 13, and the rotating shaft 6 extends to the outside of the sealing cover 15. The sealing tube body 13 and the sealing cover 15 can also protect the extension part 7 and the bearing 10 thereon to prevent dust from entering the bearing 10 and the extension part 7.

[0019] Furthermore, in order to add grease to the transition chamber 8 in a timely manner and avoid the problem of manual real-time addition, grease is contained in the sealing tube body 13, and the height of the grease is higher than the top of the extension part 7, so that the grease can not only lubricate between the rotating shaft 6 and the water outlet elbow 3, but also lubricate the bearing 10.

[0020] Furthermore, in order to remind the staff to add grease to the sealed tube body 13 in time, a liquid level sensor 12 is also provided in the sealed tube body 13 to detect the liquid level of the grease. In actual work, this liquid level sensor 12 can be connected to an external controller and a display, so that the staff can directly observe the internal liquid level data. When the liquid level is lower than the required liquid level, the staff can stop the machine and open the cover to add grease.

[0021] The above specific implementation methods cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or transformation made to the implementation methods of the present utility model falls within the protection scope of the present utility model.

[0022] Anything not described in detail in the present invention is well known to those skilled in the art.

Claims

1. An axial flow pump lubrication maintenance device, the axial flow pump includes a pump body, a suction chamber is provided near the front end of the pump body, a water outlet elbow is provided at the rear end, an impeller and a guide vane are provided corresponding to the pump body, characterized in that: An extension portion is provided on the outer wall of the water outlet elbow, and an installation cavity is provided at the end of the extension portion away from the water outlet elbow. A bearing is provided in the installation cavity, and an axial hole for the rotating shaft to pass through is provided at the end close to the water outlet elbow. The diameter of the installation cavity is larger than the aperture of the axial hole. A transition cavity is provided between the axial hole and the installation cavity, and grease is contained in the transition cavity. The extension portion is provided with a channel connected to the grease.

2. The axial flow pump lubrication maintenance device according to claim 1, characterized in that: The channel is in a trumpet shape with a larger inner diameter near the edge of the extension portion and a smaller inner diameter near the transition cavity.

3. An axial flow pump lubrication maintenance device according to claim 1 or 2, characterized in that: Two channels are provided, and the two channels are symmetrically arranged relative to the center line of the extension portion.

4. The axial flow pump lubrication maintenance device according to claim 3, characterized in that: The outer wall of the water outlet elbow is also provided with a sealing tube body, which has a sealing cavity. The extending portion is entirely located in the sealing cavity. A sealing cover is detachably provided on the upper end of the sealing tube body, and the rotating shaft extends to the outside of the sealing cover.

5. The axial flow pump lubrication maintenance device according to claim 4, characterized in that: The sealing tube body is filled with lubricating grease, and the height of the lubricating grease is higher than the top end of the extending portion.

6. The axial flow pump lubrication maintenance device according to claim 5, characterized in that: The sealed tube body is also provided with a liquid level sensor for detecting the liquid level of the grease.

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