Submerged slurry pump

Abstract

The utility model discloses a kind of underflow slurry pumps, it includes: motor, the motor is arranged on motor support, one end of the motor support is provided with bearing support, intermediate connecting pipe is provided on the bearing support;Slurry pump body, the slurry pump body is connected with the intermediate connecting pipe, impeller is provided in the slurry pump body, the rear cover plate of the impeller is provided with a plurality of back vanes;Shaft, the shaft is built in the intermediate connecting pipe, one end of the shaft is connected on the output shaft of the motor, the other end of the shaft is connected the impeller, sliding bearing is provided on the shaft, intermediate support is provided on the sliding bearing, the intermediate support is connected with the intermediate connecting pipe.The utility model compared with prior art by increasing sliding bearing on the shaft, increase fulcrum, reduce the flexible deformation amount in the process of shafting operation, ensure the stability of impeller operation, reduce the risk of broken shaft, good safety.

Description

Technical Field

[0001] This utility model belongs to the field of slurry pumps, and particularly relates to a submersible slurry pump. Background Technology

[0002] In the field of chemical industry, such as pumping phosphoric acid, the working conditions are relatively complex due to the corrosive nature of phosphoric acid and the presence of a large amount of solid and liquid mixtures in the material. When using ordinary submersible centrifugal pumps, the impeller flow channel is easily blocked during the pumping process due to the high concentration of the slurry. At the same time, long-term pumping operation can cause fatigue of the rotor components, resulting in accidents such as shaft breakage, which can lead to on-site production stoppages and serious delays in the project schedule. Utility Model Content

[0003] The present invention provides a submersible slurry pump, which increases the fulcrum by adding a sliding bearing on the shaft, thereby reducing the amount of flexural deformation during shaft operation, ensuring the smooth operation of the impeller, reducing the risk of shaft breakage, and improving safety.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a submersible slurry pump, comprising:

[0005] An electric motor is mounted on a motor bracket, one end of which is provided with a bearing bracket, and an intermediate connecting pipe is provided on the bearing bracket;

[0006] The slurry pump body is connected to the intermediate pipe. An impeller is provided inside the slurry pump body, and several back blades are provided on the rear cover plate of the impeller.

[0007] The shaft is built into the intermediate tube, one end of the shaft is connected to the output shaft of the motor, and the other end of the shaft is connected to the impeller. A sliding bearing is provided on the shaft, and an intermediate support is provided on the sliding bearing. The intermediate support is connected to the intermediate tube.

[0008] As a further description of the above technical solution:

[0009] A filter screen is installed at the inlet of the slurry pump body, and the outlet of the slurry pump body is connected to an outlet pipe.

[0010] As a further description of the above technical solution:

[0011] The slurry pump body includes a pump body, a front pump cover, and a rear pump cover, both of which are detachably connected to the pump body.

[0012] As a further description of the above technical solution:

[0013] The intermediate connector is a corrosion-resistant intermediate connector.

[0014] As a further description of the above technical solution:

[0015] A first bearing is provided between the shaft and the motor bracket.

[0016] As a further description of the above technical solution:

[0017] A second bearing is provided between the shaft and the bearing bracket.

[0018] As a further description of the above technical solution:

[0019] The sliding bearing is equipped with a flushing water pipe.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0021] 1. In this utility model, by adding a sliding bearing on the shaft, the fulcrum is increased, the amount of flexural deformation during shaft operation is reduced, the smoothness of impeller operation is ensured, and the risk of shaft breakage is reduced. The intermediate connecting pipe is made of corrosion-resistant material, which can improve service life.

[0022] 2. In this utility model, the slurry pump body adopts a separate pump body and a front and rear pump cover structure to replace the overall pump body shape. This optimized design can ensure that only the front and rear pump covers are replaced after the flow parts are worn, instead of the entire pump body, which greatly saves the user's cost of replacing spare parts.

[0023] 3. In this utility model, the impeller is a fully open impeller, which facilitates the flow of the flow channel and has a strong flow capacity. At the same time, back blades are added at the rear cover plate of the impeller to balance the excess axial force. This makes the pump run more smoothly and without blockage. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a submersible slurry pump.

[0026] Figure 2 This is a schematic diagram of the impeller structure of a submersible slurry pump.

[0027] Legend:

[0028] 1. Motor; 2. Motor bracket; 3. Bearing bracket; 4. Intermediate connecting pipe; 5. Impeller; 6. Back blade; 7. Shaft; 8. Sliding bearing; 9. Intermediate support; 10. Filter screen; 11. Discharge pipe; 12. Pump body; 13. Front pump cover; 14. Rear pump cover; 15. First bearing; 16. Second bearing; 17. Flushing water pipe. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-2 This utility model provides a technical solution: a submersible slurry pump, comprising:

[0031] Motor 1, the motor 1 is mounted on motor bracket 2, one end of the motor bracket 2 is provided with bearing bracket 3, and the bearing bracket 3 is provided with intermediate pipe 4;

[0032] The slurry pump body is connected to the intermediate pipe 4. An impeller 5 is provided inside the slurry pump body, and several back blades 6 are provided on the rear cover plate of the impeller 5.

[0033] Shaft 7 is built into the intermediate pipe 4. One end of shaft 7 is connected to the output shaft of motor 1, and the other end of shaft 7 is connected to impeller 5. A sliding bearing 8 is provided on shaft 7, and an intermediate support 9 is provided on the sliding bearing 8. The intermediate support 9 is connected to the intermediate pipe 4.

[0034] A filter screen 10 is provided at the inlet of the slurry pump body, and the outlet of the slurry pump body is connected to the outlet pipe 11.

[0035] The slurry pump body includes a pump body 12, a front pump cover 13, and a rear pump cover 14. Both the front pump cover 13 and the rear pump cover 14 are detachably connected to the pump body 12. The slurry pump body adopts a split design, meaning that when pumping large particles and experiencing wear, only the front or rear cover plate needs to be replaced; the main pump body does not need to be replaced if it is not damaged, thus significantly saving users' spare parts replacement costs. The pump body's hydraulic design employs a split structure, with the pump outlet located on the side instead of in the middle of the conventional structure. This design reduces the residence time of large, viscous materials within the pump body, greatly improving material throughput.

[0036] The intermediate connecting pipe 4 is a corrosion-resistant intermediate connecting pipe. The intermediate connecting pipe is made of a corrosion-resistant material, which can improve its service life. Specifically, it can be 2205 duplex stainless steel or HC276 Hastelloy alloy.

[0037] A first bearing 15 is provided between the shaft 7 and the motor bracket 2. An oil cup is provided at one end of the first bearing near the motor to replenish the first bearing with lubricating oil. A bearing cap is installed on the oil cup to improve the sealing effect. An oil seal is provided at the other end of the first bearing to improve the sealing performance.

[0038] A second bearing 16 is provided between the shaft 7 and the bearing bracket 3. One end of the second bearing is provided with an oil cup, and the other end is provided with an oil seal, which can improve the sealing performance.

[0039] The sliding bearing 8 is equipped with a flushing water pipe 17. The external flushing water pressure in the flushing water pipe is about 3 kg, which ensures that the lubrication system at the sliding bearing is always clean, preventing wear and extending its service life.

[0040] Working Principle: The shaft adopts a double-support structure to better bear axial force and cope with high viscosity and large particle conditions. By adding sliding bearings to the shaft, the support points are increased, reducing the amount of flexural deformation during shaft operation, ensuring the smooth operation of the impeller, and reducing the risk of shaft breakage. The intermediate connecting pipe is made of corrosion-resistant material, which can improve service life. The slurry pump body adopts a separate pump body with a front and rear pump cover structure instead of a whole pump body shape. This optimized design ensures that only the front and rear pump covers are replaced after the flow parts wear, instead of the entire pump body, which greatly saves the user's replacement parts cost. The impeller adopts a fully open impeller with a small wrap angle design and six blades. The short wrap angle design is conducive to the rapid flow of materials and enhances the material throughput. Back blades are added at the rear cover plate of the impeller to balance the axial force. This prevents the rotor components from moving axially and causing wear of parts, protecting the rotor components and making the pump run more smoothly.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A submersible slurry pump comprising: include: An electric motor is mounted on a motor bracket, one end of which is provided with a bearing bracket, and an intermediate connecting pipe is provided on the bearing bracket; The slurry pump body is connected to the intermediate pipe. An impeller is provided inside the slurry pump body, and several back blades are provided on the rear cover plate of the impeller. The shaft is built into the intermediate tube, one end of the shaft is connected to the output shaft of the motor, and the other end of the shaft is connected to the impeller. A sliding bearing is provided on the shaft, and an intermediate support is provided on the sliding bearing. The intermediate support is connected to the intermediate tube.

2. The submersible slurry pump according to claim 1, characterized in that, A filter screen is installed at the inlet of the slurry pump body, and the outlet of the slurry pump body is connected to an outlet pipe.

3. A submersible slurry pump according to claim 1, characterized in that, The slurry pump body includes a pump body, a front pump cover, and a rear pump cover, both of which are detachably connected to the pump body.

4. A submersible slurry pump according to claim 1, characterized in that, The intermediate connector is a corrosion-resistant intermediate connector.

5. A submersible slurry pump according to claim 1, characterized in that, A first bearing is provided between the shaft and the motor bracket.

6. A submersible slurry pump according to claim 1, characterized in that, A second bearing is provided between the shaft and the bearing bracket.

7. A submersible slurry pump according to claim 1, characterized in that, The sliding bearing is equipped with a flushing water pipe.

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