Vertical long-shaft draining pump structure
By adopting horn pipe assembly and multi-bearing body design in vertical long shaft drainage pumps, the air holes and cracks in the pump shaft structure are solved, maintenance and leakage risks are reduced, and hydraulic efficiency and overall equipment benefits are improved.
Patent Information
- Application Number
- CN202421499934.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In the pump shaft structure of the existing vertical long-axis drainage pump, the impeller chamber and suction horn tube are prone to generate pores and cracks, and the casting wall thickness leads to high material consumption, increased weight, and many maintenance and leakage points, which affects the use efficiency and cost.
The horn tube assembly is adopted, including flange, outer round horn tube and inner round horn tube, which is fixedly connected as one, and the outer round horn tube serves as an impeller chamber. The spindle is designed through multiple bearing bodies and shaft guard sleeves to reduce maintenance points and leakage risks. Improve hydraulic efficiency.
It reduces the maintenance and leakage points of the pump, improves hydraulic efficiency, reduces mechanical processing processes and costs, and improves the efficiency of equipment use.
Smart Images
Figure CN222185129U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of industrial vertical pumps, and in particular relates to a vertical long-axis drainage pump structure. Background Art
[0002] Vertical long-axis drainage pumps can transport clean water and sewage containing certain solid particles (such as iron filings, sand, coal powder, etc.), corrosive industrial wastewater, and seawater. Previously, these industries often used submersible pumps. Because the motor is always in the water, the pump has a high failure rate and on-site maintenance is very inconvenient.
[0003] Since the motor matched with the vertical long-axis drainage pump is on the foundation, it can be repaired on site and the pump failure rate is low. Moreover, since the pump immerses the impeller in the liquid, it does not need to be filled with water or vacuumed when starting, which makes it very convenient to use. Moreover, the vertical long-axis drainage pump is suitable for use in situations where the layout space is narrow and the infrastructure investment is small. It can lift various media with lower liquid levels in various water collection wells, rainwater wells, and inspection wells to the ground. Therefore, the vertical long-axis drainage pump has been widely used in raw water treatment plants, sewage treatment plants, metallurgical steel industry (especially the industry's vortex pool to transport oxidized iron sheets), power plants, mines, municipal engineering and farmland water conservancy projects.
[0004] However, in the structure of the existing vertical long-axis drainage pump, the pump shaft is usually connected by one or more shafts, and the impeller chamber and suction bell pipe are made of nickel-chromium cast iron, martensitic stainless steel, austenitic stainless steel and other castings and are fastened together by bolts. During casting, the impeller chamber and suction bell pipe castings are prone to pores and cracks; in addition, the wall thickness of the casting is at least 20mm, the raw material consumption is large, the weight is increased, and it does not meet the requirements of lightweight design. Utility Model Content
[0005] The utility model aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a vertical long-axis drainage pump structure; the utility model can reduce maintenance and leakage points, has small flow resistance at the flow-through part, high hydraulic efficiency, saves costs, and has significant benefits.
[0006] To achieve the above purpose, the utility model adopts the following technical solutions.
[0007] The utility model provides a vertical long-axis drainage pump structure, including a base, a discharge pipe, an external pipe, a main shaft, a guide vane body, a pump impeller, and a trumpet tube assembly. The upper end of the base is connected to a motor bracket, the lower end of the base is connected to the upper end of the discharge pipe, the lower end of the discharge pipe is connected to the upper end of the external pipe, the lower end of the external pipe is connected to the guide vane body, and the lower end of the guide vane body is connected to the trumpet tube assembly. The main shaft is simultaneously arranged in the guide vane body, the external pipe, the discharge pipe, the base and the motor bracket, and a plurality of bearings with guide bearings are connected to the main shaft. body, a plurality of bearing bodies are respectively connected to the base seat, the external tube and the guide vane body, the pump impeller is located below the guide vane body and connected to the main shaft, the main shaft is connected to the motor bracket through a thrust bearing component, and a pump coupling is arranged at the end inside the motor bracket, characterized in that the trumpet tube assembly comprises a flange, an outer cylindrical trumpet tube, and an inner cylindrical trumpet tube, the flange, the outer cylindrical trumpet tube and the inner cylindrical trumpet tube are fixedly connected as a whole, the flange is connected to the guide vane body, the outer cylindrical trumpet tube serves as an impeller chamber, and the pump impeller is located inside the outer cylindrical trumpet tube.
[0008] Furthermore, the outer circular trumpet tube includes a conical cone tube armor and a concave plate, the concave plate is fixed to the closed end of the cone tube armor, and the flange is fixed to the flared end of the cone tube armor.
[0009] Furthermore, the inner circular flare tube includes conical cone tube B, cone tube C and cone tube D, the diameters of cone tube B, cone tube C and cone tube D increase successively, the closed end of cone tube B is fixed to the concave plate, the expanded end of cone tube B is fixed to the closed end of cone tube C, and the expanded end of cone tube C is fixed to the closed end of cone tube D.
[0010] Furthermore, a plurality of inner ribs are provided on the inner side of the inner circular trumpet tube, and a plurality of outer ribs are provided on the outer sides of the outer circular trumpet tube and the inner circular trumpet tube.
[0011] Furthermore, the main shaft includes an upper shaft, a middle shaft and a lower shaft, and the upper shaft and the middle shaft, as well as the middle shaft and the lower shaft are connected via a retaining ring and a coupling cylinder.
[0012] Furthermore, the middle section shaft is formed by connecting a plurality of middle section shafts in sequence through clamping rings and coupling cylinders.
[0013] Furthermore, a shaft protection sleeve is arranged on the outer side of the main shaft, and the shaft protection sleeve is connected to the guide vane body and each end of the bearing body.
[0014] Furthermore, a balancing hole is provided on the pump impeller.
[0015] Furthermore, an axial sealing component is connected to the portion of the main shaft inside the motor bracket.
[0016] Furthermore, sealing rings are provided at both ends of the pump impeller.
[0017] The beneficial effects of the utility model.
[0018] The utility model adopts a new structure of the suction bell pipe and utilizes the outer circular bell mouth as the impeller chamber, abandons the original method of fastening the suction bell pipe and the external impeller chamber with bolts, reduces maintenance and leakage points; the flow resistance of the suction bell pipe flow portion is small and the hydraulic efficiency is high; after the impeller chamber and the suction bell pipe are integrated into one, the production cost is reduced, and the production is convenient, which saves mechanical processing procedures and time and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0020] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model.
[0021] Figure 2 It is a cross-sectional schematic diagram of the trumpet tube assembly of the utility model.
[0022] Figure 3 It is a side view of the trumpet tube of the utility model.
[0023] Markings in the figure: 1 is the base, 2 is the discharge pipe, 3 is the external pipe, 4 is the guide vane body, 5 is the pump impeller, 6 is the trumpet tube assembly, 7 is the motor bracket, 8 is the guide bearing, 9 is the bearing body, 10 is the pump coupling, 11 is the flange, 12 is the cone tube A, 13 is the concave plate, 14 is the cone tube B, 15 is the cone tube C, 16 is the cone tube D, 17 is the inner rib plate, 18 is the outer rib plate, 19 is the upper shaft, 20 is the middle shaft, 21 is the lower shaft, 22 is the retaining ring, 23 is the coupling cylinder, 24 is the shaft sleeve, 25 is the balance hole, 26 is the axial sealing component, 27 is the sealing ring, and 28 is the thrust bearing component DETAILED DESCRIPTION
[0024] As shown in the accompanying drawings, this embodiment provides a vertical long-axis drainage pump structure, including a base 1, a discharge pipe 2, an external pipe 3, a main shaft, a guide vane body 4, a pump impeller 5, and a trumpet pipe assembly 6.
[0025] The upper end of the base 1 is connected to the motor bracket 7, the lower end of the base 1 is connected to the upper end of the discharge pipe 2, the lower end of the discharge pipe 2 is connected to the upper end of the external pipe 3, the lower end of the external pipe 3 is connected to the guide vane body 4, and the lower end of the guide vane body 4 is connected to the trumpet tube assembly 6.
[0026] The main shaft is simultaneously arranged in the guide vane body 4, the external pipe 3, the discharge pipe 2, the base 1 and the motor bracket 7. Since the main shaft is very long as a whole, in order to facilitate processing, the main shaft includes an upper shaft 19, a middle shaft 20 and a lower shaft 21. The upper shaft and the middle shaft 20, the middle shaft 20 and the lower shaft 21 are connected by a clamping ring 22 and a coupling cylinder 23. In addition, the middle shaft 20 is composed of a plurality of middle segment shafts connected in sequence by a clamping ring 22 and a coupling cylinder.
[0027] A plurality of bearing bodies 9 with guide bearings 8 are connected to the main shaft, and the plurality of bearing bodies 9 are respectively connected to the base 1, the external pipe 3 and the guide vane body 4. Since the vertical long-axis drainage pump is often used to transport liquids with impurities, and the liquids often contain a large amount of sediment, these abrasives will quickly wear the guide bearings 8, so a shaft protection sleeve 24 is provided on the outside of the main shaft, and the shaft protection sleeve 24 is connected to the guide vane body 4 and the ends of each bearing body 9. The shaft protection sleeve 24 is filled with clean water, and the sewage outside cannot enter the shaft protection sleeve 24 tube to ensure the life of the plurality of guide bearings 8.
[0028] The guide bearing 8 is made of a water-lubricated rubber sliding bearing, but can also be made of metal when the conveying liquid temperature is high (T>80°C).
[0029] The pump impeller 5 is located below the guide vane body 4 and connected to the main shaft. When the pump is running, a large axial force will be generated on its rotor. The axial force acting on the pump impeller 5 must be balanced or eliminated. Otherwise, it will cause the rotor to move in series or even contact with fixed parts, causing damage to the parts. Using thrust bearings to balance will make the structure complicated. Therefore, hydraulic methods must be used to balance part or all of the axial force. Therefore, a balancing hole 25 is provided on the pump impeller 5 to balance part of the axial force, and the residual axial force is borne by the thrust bearing in the bearing box, thereby ensuring the smooth operation of the water pump.
[0030] The main shaft is connected to the motor support 7 through a thrust bearing component 28, and a pump coupling 10 is provided at the end inside the motor support 7. The pump coupling 10 transmits the rotational force of the motor mounted on the motor support 7 to the main shaft.
[0031] The bell tube assembly 6 includes a flange 11, an outer cylindrical bell tube, and an inner cylindrical bell tube. The flange 11, the outer cylindrical bell tube and the inner cylindrical bell tube are fixedly connected as a whole. The flange 11 is connected to the guide vane body 4. The outer cylindrical bell tube serves as an impeller chamber, and the pump impeller 5 is located in the outer cylindrical bell tube.
[0032] The outer circular trumpet tube includes a conical cone tube armor 12 and a concave plate 13. The concave plate 13 is fixed to the closed end of the cone tube armor 12. The flange 11 is fixed to the expanded end of the cone tube armor 12. The cone tube armor 12 and the concave plate 13 are manufactured by mechanical processing to achieve ideal size and shape and position tolerances.
[0033] The inner round trumpet tube includes a conical cone tube B 14, a cone tube C 15 and a cone tube D 16. The diameters of the cone tube B 14, the cone tube C 15 and the cone tube D 16 increase in sequence. The closed end of the cone tube B 14 is fixed to the concave plate 13, the expanded end of the cone tube B 14 is fixed to the closed end of the cone tube C 15, and the expanded end of the cone tube C 15 is fixed to the closed end of the cone tube D 16. The cone tube B 14, the cone tube C 15 and the cone tube D 16 are preformed and then assembled into an ideal streamline by welding.
[0034] A plurality of inner ribs 17 are disposed on the inner side of the inner circular trumpet tube, and a plurality of outer ribs 18 are disposed on the outer sides of the outer circular trumpet tube and the inner circular trumpet tube.
[0035] The part of the main shaft inside the motor bracket 7 is connected with an axial sealing component 26, which can be a soft filler, an oil seal or a mechanical seal. At the same time, sealing rings 27 are arranged at both ends of the pump impeller 5.
[0036] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
Claims
1. A vertical long-axis drainage pump structure, comprising a base (1), a discharge pipe (2), an external pipe (3), a main shaft, a guide vane body (4), a pump impeller (5), and a bell tube assembly (6), wherein the upper end of the base (1) is connected to a motor bracket (7), the lower end of the base (1) is connected to the upper end of the discharge pipe (2), the lower end of the discharge pipe (2) is connected to the upper end of the external pipe (3), the lower end of the external pipe (3) is connected to the guide vane body (4), the lower end of the guide vane body (4) is connected to the bell tube assembly (6), and the main shaft is arranged on the guide vane body (4), The main shaft is connected to a plurality of bearing bodies (9) having guide bearings (8) in the external pipe (3), the discharge pipe (2), the base (1) and the motor bracket (7); the plurality of bearing bodies (9) are respectively connected to the base (1), the external pipe (3) and the guide vane body (4); the pump impeller (5) is located below the guide vane body (4) and is connected to the main shaft; the main shaft is connected to the motor bracket (7) via a thrust bearing component (28); and a pump coupling (10) is provided at the end portion in the motor bracket (7); and the pump coupling (10) is characterized in that: The bell tube assembly (6) comprises a flange (11), an outer round bell tube, and an inner round bell tube; the flange (11), the outer round bell tube, and the inner round bell tube are fixedly connected as a whole; the flange (11) is connected to the guide vane body (4); the outer round bell tube serves as an impeller chamber; and the pump impeller (5) is located inside the outer round bell tube.
2. A vertical long-axis drainage pump structure according to claim 1, characterized in that The outer circular trumpet tube comprises a conical cone tube armor (12) and a concave plate (13), wherein the concave plate (13) is fixed to the closed end of the cone tube armor (12), and the flange (11) is fixed to the flared end of the cone tube armor (12).
3. A vertical long-axis drainage pump structure according to claim 2, characterized in that: The inner circular trumpet tube comprises a conical cone tube B (14), a cone tube C (15) and a cone tube D (16), wherein the diameters of the cone tube B (14), the cone tube C (15) and the cone tube D (16) increase in sequence, the closed end of the cone tube B (14) is fixed to the concave plate (13), the expanded end of the cone tube B (14) is fixed to the closed end of the cone tube C (15), and the expanded end of the cone tube C (15) is fixed to the closed end of the cone tube D (16).
4. A vertical long-axis drainage pump structure according to claim 1, characterized in that: A plurality of inner ribs (17) are arranged on the inner side of the inner circular trumpet tube, and a plurality of outer ribs (18) are arranged on the outer sides of the outer circular trumpet tube and the inner circular trumpet tube.
5. A vertical long-axis drainage pump structure according to claim 1, characterized in that: The main shaft comprises an upper shaft (19), a middle shaft (20) and a lower shaft (21); the upper shaft (19) and the middle shaft (20), as well as the middle shaft (20) and the lower shaft (21) are connected via a clamping ring (22) and a coupling cylinder (23).
6. A vertical long-axis drainage pump structure according to claim 5, characterized in that: The middle section shaft (20) is formed by connecting a plurality of middle section shafts in sequence through a clamping ring (22) and a coupling cylinder.
7. A vertical long-axis drainage pump structure according to claim 1, characterized in that: A shaft protection sleeve (24) is provided on the outside of the main shaft, and the shaft protection sleeve (24) is connected to the guide vane body (4) and the end of each bearing body (9).
8. A vertical long-axis drainage pump structure according to claim 1, characterized in that: The pump impeller (5) is provided with a balancing hole (25).
9. A vertical long-axis drainage pump structure according to claim 1, characterized in that: An axial sealing component (26) is connected to the portion of the main shaft inside the motor bracket (7).
10. A vertical long-axis drainage pump structure according to claim 1, characterized in that: Sealing rings (27) are provided at both ends of the pump impeller (5).