Submerged slurry pump lower bearing mechanism

Abstract

The utility model discloses a lower supporting mechanism of submerged slag slurry pump, including mounting panel, the lower surface fixedly connected with support of mounting panel, the inside of support is equipped with main shaft, still including support protection subassembly, support protection subassembly: it includes angular contact ball bearing, sealing bearing, shaft sleeve and spiral groove, the inside lower side fixedly connected with angular contact ball bearing of the inside of support, the inner arc surface of the inner ring of angular contact ball bearing is fixedly connected with the outer surface of main shaft, the inside upper and lower sides of support all are fixedly connected with sealing bearing, the inner arc surface of the inner ring of sealing bearing all is fixedly connected with the outer surface of main shaft, the inside upper and lower sides of support all are fixedly connected with shaft sleeve, and this lower supporting mechanism of submerged slag slurry pump makes the particulate matter in slag slurry as far as possible away from sealing bearing to reduce the wear and tear of sealing bearing and shaft sleeve, improve angular contact ball bearing, sealing bearing and the service life of shaft sleeve.

Description

Technical Field

[0001] This utility model relates to the field of slurry pump technology, specifically to the lower support mechanism of a submersible slurry pump. Background Technology

[0002] Submersible slurry pumps are an important fluid transport equipment, widely used in mining, metallurgy, coal, power and other industries. They are used to transport high-concentration slurries containing highly abrasive solid particles. Their core feature is that the working part of the pump body (impeller, guard plate, etc.) is submerged in the liquid, while the drive motor is located above the liquid. The two are connected by a long shaft and transmit torque. In order to enable the long shaft to transmit driving force stably, a support mechanism is required to support the long shaft. In the prior art, patent CN201802674U discloses a lower support structure for a submersible slurry pump, which includes a rotating shaft mounted on the housing via bearings. The upper part of the rotating shaft can be connected to a power unit via a transmission component, and the lower part of the rotating shaft can be connected to an impeller via a mechanical seal. The bearings installed between the rotating shaft and the housing are a pair of angular contact ball bearings. A bearing end cover is installed above the angular contact ball bearings, and a wave spring is pressed between the bearing end cover and the angular contact ball bearing below it. The lower support structure of this type of submersible slurry pump has the following disadvantages: although the main shaft is supported by wave springs and angular contact ball bearings, which can provide stable support and ensure stable operation of the main shaft, the slurry contains a large number of particles. When these particles come into contact with the angular contact ball bearings, they will accelerate the wear of the angular contact ball bearings and reduce their service life. Therefore, we propose a lower support mechanism for submersible slurry pumps. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome existing defects and provide a lower support mechanism for a submersible slurry pump. Through a support and protection component, a sealed bearing protects the angular contact ball bearing, preventing wear of the angular contact ball bearing by the slurry. Simultaneously, the centrifugal force generated by the spiral groove and the impeller's rotation on the slurry keeps particles in the slurry as far away from the sealed bearing as possible, thereby reducing wear on the sealed bearing and bushing, and improving the service life of the angular contact ball bearing, sealed bearing, and bushing. This effectively solves the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a lower support mechanism for a submersible slurry pump, including a mounting plate, a bracket fixedly connected to the lower surface of the mounting plate, a main shaft inside the bracket, and a support and protection assembly; Support and protection assembly: This includes an angular contact ball bearing, a sealed bearing, a bushing, and a spiral groove. An angular contact ball bearing is fixedly connected to the lower inner side of the support. The inner arc surface of the inner ring of the angular contact ball bearing is fixedly connected to the outer surface of the main shaft. Sealed bearings are fixedly connected to both the upper and lower inner sides of the support. The inner arc surface of the inner ring of each sealed bearing is fixedly connected to the outer surface of the main shaft. Bushings are fixedly connected to both the upper and lower inner sides of the support. A spiral groove is formed on the side of the bushing away from the angular contact ball bearing. The inner surface of the bushing is rotatably connected to the outer surface of the main shaft. Through the support and protection assembly, the sealed bearing protects the angular contact ball bearing, preventing wear from the slurry. Simultaneously, the spiral groove's guiding effect and the impeller's rotation generate centrifugal force on the slurry, keeping particles in the slurry as far away from the sealed bearing as possible, thereby reducing wear on the sealed bearing and bushing, and improving the service life of the angular contact ball bearing, sealed bearing, and bushing.

[0005] Furthermore, the support and protection assembly also includes blades, and the outer surface of the main shaft is fixedly connected with mounting rings that are symmetrically distributed vertically. The outer surface of each mounting ring is fixedly connected with blades that are evenly distributed, generating centrifugal force to throw out particles in the slurry.

[0006] Furthermore, a pump body is fixedly connected to the lower side of the bracket, and an impeller is fixedly connected to the lower end of the main shaft. The impeller is located inside the pump body and pumps the slurry.

[0007] Furthermore, a discharge pipe is fixedly connected to the left side of the pump body, and a connecting flange is fixedly connected to the upper end of the discharge pipe to discharge slurry.

[0008] Furthermore, a lower filter screen is fixedly connected to the lower side of the pump body to initially filter the slurry and prevent larger impurities in the slurry from entering the interior of the pump body.

[0009] Furthermore, a mounting base is fixedly connected to the upper surface of the mounting plate to securely mount the motor.

[0010] Furthermore, the lower outer surface of the support is provided with evenly distributed through holes to facilitate the ejection of particles from the slurry.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The lower support mechanism of this submersible slurry pump has the following advantages: By using a support and protection assembly, the angular contact ball bearing is protected by a sealed bearing to prevent wear of the angular contact ball bearing by the slurry. At the same time, the centrifugal force generated by the spiral groove and the rotation of the impeller on the slurry keeps the particles in the slurry as far away from the sealed bearing as possible, thereby reducing the wear of the sealed bearing and the bushing and improving the service life of the angular contact ball bearing, the sealed bearing and the bushing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is an enlarged structural diagram of point A in this utility model.

[0013] In the diagram: 1 Mounting plate, 2 Mounting base, 3 Bracket, 4 Through hole, 5 Pump body, 6 Lower filter screen, 7 Discharge pipe, 8 Connecting flange, 9 Protective components, 91 Angular contact ball bearing, 92 Sealed bearing, 93 Shaft sleeve, 94 Spiral groove, 95 Blade, 10 Main shaft, 11 Impeller. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3 This embodiment provides a technical solution: a lower support mechanism for a submersible slurry pump, including a mounting plate 1. A mounting base 2 is fixedly connected to the upper surface of the mounting plate 1. The lower support mechanism of the submersible slurry pump is fixedly installed to an external motor through the mounting base 2. The upper end of the main shaft 10 can be connected to the lower end of the output shaft of the external motor through a coupling, thereby transmitting driving force. A bracket 3 is fixedly connected to the lower surface of the mounting plate 1. The lower side of the outer surface of the bracket 3 has evenly distributed through holes 4. The main shaft 10 is located inside the bracket 3. A pump body 5 is fixedly connected to the lower side of the bracket 3. An impeller 11 is fixedly connected to the lower end of the pump body 5. The impeller 11 is located inside the pump body 5. An external motor drives the main shaft 10 to rotate, thereby rotating the impeller 11 and pumping the slurry. A discharge pipe 7 is fixedly connected to the left side of the pump body 5. A connecting flange 8 is fixedly connected to the upper end of the discharge pipe 7. The pipe can be connected to an external conveying pipeline through the connecting flange to convey the slurry. A lower filter screen 6 is fixedly connected to the lower side of the pump body 5 to perform preliminary filtration of larger impurities inside the slurry, preventing larger impurities from entering the pump body 5 and causing the impeller 11 to jam. The pump body 5 also includes a support and protection assembly 9. Support and protection assembly 9 includes an angular contact ball bearing 91, a sealed bearing 92, a bushing 93, and a helical groove 94. An angular contact ball bearing 91 is fixedly connected to the lower inner side of the bracket 3. The inner arc surface of the inner ring of the angular contact ball bearing 91 is fixedly connected to the outer surface of the main shaft 10. Sealed bearings 92 are fixedly connected to both the upper and lower inner sides of the bracket 3. The inner arc surface of the inner ring of the sealed bearing 92 is fixedly connected to the outer surface of the main shaft 10. Bushings 93 are fixedly connected to both the upper and lower inner sides of the bracket 3. Helical grooves 94 are provided on the side of the bushings 93 away from the angular contact ball bearing 91. The inner surface of the bushings 93 is rotatably connected to the outer surface of the main shaft 10. The support and protection assembly 9 also includes blades 95. A mounting ring symmetrically distributed vertically is fixedly connected to the outer surface of the main shaft 10. Evenly distributed blades 95 are fixedly connected to the outer surface of each mounting ring. The angular contact ball bearing 91 supports the axial and radial runout of the main shaft 10. The sealed bearing 92 effectively isolates the slurry, preventing slurry from entering the angular contact ball bearing 91 and the main shaft 10. The connection points cause excessive wear of the angular contact ball bearing 91. When the external motor drives the main shaft 10 to rotate, due to the viscosity of the slurry fluid, the smooth surface of the main shaft 10 will drag the fluid layer on its surface along with it. This dragged fluid enters the stationary spiral groove 94, and its movement path is forced to change, moving along the trajectory of the spiral groove 94. Since the spiral groove 94 is a "reverse" spiral, the fluid is continuously and forcibly moved away from the bushing 93, thereby reducing the contact and wear between the slurry and the sealing bearing 92, and thus improving the service life of the sealing bearing 92. At the same time, when the main shaft 10 rotates, the blade 95 rotates, and the rotation of the blade 95 generates centrifugal force, causing the particles in the slurry to be thrown away from the middle of the support 3. The particles in the slurry are discharged through the through hole 4, thereby minimizing the contact between the particles and the sealing bearing 92 and the bushing 93, thereby reducing the friction on the sealing bearing 92 and the bushing 93, and improving the service life of the sealing bearing 92 and the bushing 93.

[0016] The working principle of the lower support mechanism of the submersible slurry pump provided by this utility model is as follows: The lower support mechanism of the submersible slurry pump is fixedly installed with an external motor through the mounting base 2. The upper end of the main shaft 10 can be connected to the lower end of the output shaft of the external motor through a coupling, thereby transmitting driving force. The angular contact ball bearing 91 bears and supports the axial and radial runout of the main shaft 10. The sealed bearing 92 effectively isolates the slurry, preventing the slurry from entering the connection between the angular contact ball bearing 91 and the main shaft 10 and causing excessive wear of the angular contact ball bearing 91. When the external motor drives the main shaft 10 to rotate, due to the viscosity of the slurry fluid, the smooth surface of the main shaft 10 will drag the fluid layer on its surface to move together. This dragged fluid... Upon entering the stationary spiral groove 94, the fluid's path is forced to change, moving along the trajectory of the spiral groove 94. Since the spiral groove 94 is a "reverse" spiral, the fluid is continuously and forcibly moved away from the bushing 93, thereby reducing the contact and wear between the slurry and the sealing bearing 92, and thus improving the service life of the sealing bearing 92. At the same time, when the main shaft 10 rotates, the blades 95 rotate, and the rotation of the blades 95 generates centrifugal force, causing the particles in the slurry to be thrown away from the middle of the support 3. The particles in the slurry are discharged through the through hole 4, thereby minimizing the contact between the particles and the sealing bearing 92 and the bushing 93, thereby reducing the friction on the sealing bearing 92 and the bushing 93, and improving the service life of the sealing bearing 92 and the bushing 93.

[0017] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A lower support mechanism for a submersible slurry pump, comprising a mounting plate (1), wherein a bracket (3) is fixedly connected to the lower surface of the mounting plate (1), and a main shaft (10) is provided inside the bracket (3), characterized in that: It also includes a support and protection component (9); Support and protection assembly (9): It includes an angular contact ball bearing (91), a sealed bearing (92), a bushing (93) and a spiral groove (94). The angular contact ball bearing (91) is fixedly connected to the lower inner side of the bracket (3). The inner arc surface of the inner ring of the angular contact ball bearing (91) is fixedly connected to the outer surface of the main shaft (10). The upper and lower sides of the bracket (3) are fixedly connected to the sealed bearing (92). The inner arc surface of the inner ring of the sealed bearing (92) is fixedly connected to the outer surface of the main shaft (10). The upper and lower sides of the bracket (3) are fixedly connected to the bushing (93). The bushing (93) is provided with a spiral groove (94) on the side away from the angular contact ball bearing (91). The inner surface of the bushing (93) is rotatably connected to the outer surface of the main shaft (10).

2. The lower support mechanism of the submersible slurry pump according to claim 1, characterized in that: The support and protection assembly (9) also includes blades (95). The outer surface of the main shaft (10) is fixedly connected with mounting rings that are symmetrically distributed in the upper and lower parts. The outer surface of each mounting ring is fixedly connected with blades (95) that are evenly distributed.

3. The lower support mechanism of the submersible slurry pump according to claim 1, characterized in that: The pump body (5) is fixedly connected to the lower side of the bracket (3), and the impeller (11) is fixedly connected to the lower end of the main shaft (10). The impeller (11) is located inside the pump body (5).

4. The lower support mechanism of the submersible slurry pump according to claim 3, characterized in that: The pump body (5) is fixedly connected to a discharge pipe (7) on the left side, and a connecting flange (8) is fixedly connected to the upper end of the discharge pipe (7).

5. The lower support mechanism of the submersible slurry pump according to claim 3, characterized in that: A lower filter screen (6) is fixedly connected to the lower side of the pump body (5).

6. The lower support mechanism of the submersible slurry pump according to claim 3, characterized in that: The mounting plate (1) is fixedly connected to the mounting base (2) on its upper surface.

7. The lower support mechanism of the submersible slurry pump according to claim 1, characterized in that: The lower side of the outer surface of the bracket (3) is provided with uniformly distributed through holes (4).

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