Large tubular pump of gear transmission structure

Abstract

The large tubular pump of the gear transmission structure comprises a pump shell, the upper end of the pump shell fixedly communicates with a mounting frame, and the upper end of the mounting frame is fixedly connected with a driving motor. The first bevel gear and the second bevel gear are arranged, bevel gear transmission is adopted, the torque of the driving motor is transmitted to the impeller, the impeller rotates while the pump shaft does not rotate, in this way, the torque does not need to be considered when the pump shaft is designed, and the first bevel gear and the second bevel gear with different speed ratios are selected to be matched, so that the rotating speed of the driving motor can be increased; the cost of a driving motor is reduced to a great extent, the problems that a large-scale wet stator submersible full tubular pump motor is difficult to design, difficult to produce and machine, heavy, high in waterproof line cost and the like are solved, the characteristic that the submersible full tubular pump is compact in structure is reserved, the influence of the wet motor efficiency on the pump efficiency is reduced, and the service life of the submersible full tubular pump is prolonged. The device has the characteristics of compact structure, convenient installation, safety, reliability, high efficiency and the like.

Description

Technical Field

[0001] The invention relates to the technical field of tubular pumps, in particular to a large tubular pump with a gear transmission structure. Background Art

[0002] The tubular pump is a type of horizontal axial flow pump. It is installed in the machine pit inside the underwater dam. Its inlet and outlet flow channels are located in a straight line, which is approximately a straight cylindrical shape. It has less hydraulic loss, high water lifting efficiency, compact structure, convenient installation and maintenance, and simple pumping station engineering. The tubular pump is a low-head axial flow pump. Except for the impeller and the outer pump casing made of metal materials, the inlet and outlet flow channels are made of masonry or concrete structure. Its head is less than 2 meters, with large flow, simple structure, low cost and high efficiency. It is suitable for drainage and irrigation in low-lying areas. Large-displacement flood control and drainage pumping stations are gradually increasing. However, due to the limitation of the area occupied by the pumping station, the compact impeller built-in submersible full-tubular pump has developed rapidly.

[0003] In the prior art, the efficiency and power factor of the wet stator motor of a submersible full-flow pump are lower than those of a dry stator motor; the gap between the stator and rotor will cause medium backflow and disrupt the inlet flow state; the pump efficiency is lower than that of an ordinary submersible full-flow pump. For a large submersible full-flow pump, at a low speed, the number of magnetic pole pairs of the motor is large, which increases the weight of the motor and also reduces the power factor and efficiency of the motor; according to the structure of the submersible full-flow pump, the motor rotor is installed on the outer edge of the impeller, which itself will increase the diameter of the stator and rotor of the motor and increase the cost of the motor. In addition, the cost of the wet stator water-resistant coil is relatively high, which results in the submersible full-flow pump having a compact structure but a high actual cost. Summary of the invention

[0004] The object of the present invention is to provide a large-scale cross-flow pump with a gear transmission structure to solve the problems proposed in the above-mentioned background technology that the efficiency and power factor of the wet stator motor of the submersible full-flow pump are lower than those of the dry stator motor; the gap between the stator and the rotor will cause the medium to flow back and disrupt the inlet flow state; the pump efficiency is lower than that of the ordinary submersible full-flow pump. For large-scale submersible full-flow pumps, at a low speed, the number of magnetic pole pairs of the motor is large, which increases the weight of the motor and also reduces the power factor and efficiency of the motor; according to the structure of the submersible full-flow pump, the motor rotor is installed on the outer edge of the impeller, which itself will increase the stator and rotor diameter of the motor and increase the cost of the motor. In addition, the cost of the wet stator water-resistant coil is relatively high, which leads to the problem that although the submersible full-flow pump has a compact structure, the actual cost is relatively high.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-scale cross-flow pump with a gear transmission structure, comprising a pump casing, the upper end of the pump casing is fixedly connected to a mounting frame, the upper end of the mounting frame is fixedly connected to a driving motor, both sides of the middle part of the inner ring surface of the pump casing are fixedly connected to inner support rings, an impeller is arranged inside the pump casing, the outer surface of the impeller is fixedly connected to a first bevel gear, a shaft head nut and a second bevel gear are arranged at the output end of the driving motor, the driving motor is fixedly connected to the second bevel gear through the shaft head nut, the shaft head nut is meshed with the first bevel gear, side retaining rings are arranged on both sides of the impeller, the outer surface of the side retaining ring is in contact with the inner surface of the inner support ring, the interior of the impeller is fixedly connected to an inner impeller body, the interior of the inner impeller body A pump shaft is provided, and the driving motor can use a dry motor or a submersible motor according to the use environment. Through the setting of the No. 1 bevel gear and the No. 2 bevel gear and the bevel gear transmission, the driving motor torque is transmitted to the impeller, the impeller rotates but the pump shaft does not rotate. In this way, there is no need to consider the torque when designing the pump shaft. By selecting the No. 1 bevel gear and the No. 2 bevel gear with different speed ratios, the speed of the driving motor can be increased, and the cost of the driving motor can be reduced to a great extent. It not only solves the problems of difficult design of large wet stator submersible full-flow pump motors, difficult production and processing, bulky motors, and high water-resistant line costs, but also retains the compact structure of the submersible full-flow pump, reduces the influence of the wet motor efficiency on the pump efficiency, and has the characteristics of compact structure, easy installation, safety and reliability, high efficiency, etc.

[0006] Preferably, bearings are fixedly connected on both sides of the inner impeller body, the pump shaft is fixedly connected to the inner annular surface of the bearing, a water suction chamber and a guide vane body are fixedly connected on both sides of the pump casing, and sleeves are fixedly connected inside the water suction chamber and the guide vane body.

[0007] Preferably, the interior of the sleeve is fixedly connected with an inner support frame, the two ends of the pump shaft are respectively fixedly connected to the two inner support frames, and side covers are installed between the two sleeves and the two ends of the inner impeller body. The arrangement of the inner support frame can increase the stability of the pump shaft during use.

[0008] Preferably, the inner edges of the two inner support rings away from the first bevel gear are both provided with side sealing grooves, and sealing rings are arranged inside the side sealing grooves.

[0009] Preferably, one side of the two inner support rings is fixedly connected with a pressure cover, one side of the pressure cover squeezes the sealing ring, and an oil chamber is formed between the inner support ring, the impeller, and the side retaining ring, which is sealed by the sealing ring. In this way, when in use, lubricating oil can be placed there to facilitate heat conversion between the No. 1 bevel gear and the No. 2 bevel gear, thereby increasing the service life of the No. 1 bevel gear and the No. 2 bevel gear.

[0010] Preferably, a receiving bottom plate is provided below the pump housing, and side connecting plates are fixedly connected between the middle sides of the upper end of the receiving bottom plate and the pump housing.

[0011] Preferably, the insides of the two side connecting plates are fixedly connected with a transverse plate, and a screw rod is rotatably connected between the transverse plate and the supporting bottom plate.

[0012] Preferably, a through groove is provided inside the receiving bottom plate, a mounting seat is provided above the receiving bottom plate, a threaded hole is provided in the middle of the mounting seat, and the threaded hole is engaged with the screw rod.

[0013] Preferably, both sides of the middle part of the lower end of the mounting seat are fixedly connected with limiting clamps, the limiting clamps are clamped with the through slots, the lower end of the through slots are fixedly connected with universal wheels, and both sides of the middle part of the upper end of the mounting seat are fixedly connected with reinforcing ribs. The reinforcing ribs are provided to increase the strength of the mounting seat and to guide the mounting seat so that the mounting seat moves up and down more smoothly. The sides of the mounting seat and the reinforcing ribs are in contact with the side connecting plates. The limiting clamps are provided to increase the stability of the connection with the supporting base plate to prevent deviation.

[0014] Preferably, the four corners of the receiving base plate are provided with fixed sliding holes, the interior of the fixed sliding holes is slidably connected to a guide cylinder, the upper end of the guide cylinder is fixedly connected to an end limit ring, and through the arrangement of the screw rod and the guide cylinder, when moving, the mounting seat can be moved down to expose the universal wheel and contact the ground for movement. When installing, the positioning can be completed by plugging the guide cylinder with the bolt at the mounting position, and then the universal wheel can be retracted to connect the bolt with the fixed sliding hole. In this way, there is no need for gradual transportation and adjustment, so it is easy to install and use.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by setting the No. 1 bevel gear and the No. 2 bevel gear, the torque of the driving motor is transmitted to the impeller by adopting the bevel gear transmission, and the impeller rotates while the pump shaft does not rotate. In this way, there is no need to consider the torque when designing the pump shaft. By selecting the No. 1 bevel gear and the No. 2 bevel gear with different speed ratios, the rotation speed of the driving motor can be increased, and the cost of the driving motor can be reduced to a great extent. It not only solves the problems of difficult design of large wet stator submersible full-flow pump motors, difficult production and processing, bulky motors, and high cost of water-resistant lines, but also retains the compact structure of the submersible full-flow pump, reduces the influence of the wet motor efficiency on the pump efficiency, and has the characteristics of compact structure, convenient installation, safety and reliability, high efficiency, etc.

[0016] 2. In the present invention, the stability of the pump shaft during use can be increased by setting the inner support frame, and an oil chamber is formed between the inner support ring, the impeller, and the side retaining ring, which is sealed by a sealing ring. In this way, when in use, lubricating oil can be placed there to facilitate heat conversion between the No. 1 bevel gear and the No. 2 bevel gear, thereby increasing the service life of the No. 1 bevel gear and the No. 2 bevel gear.

[0017] 3. In the present invention, by setting the screw rod and the guide cylinder, when moving, the mounting seat can be moved down to expose the universal wheel and contact the ground for movement. When installing, the positioning can be completed by plugging the guide cylinder with the bolt at the mounting position. Then, the universal wheel can be retracted to connect the bolt with the fixed slide hole. In this way, there is no need for gradual transportation and adjustment, so as to facilitate installation and use. By setting the limiting clamp plate, the stability of the connection with the receiving base plate can be increased to prevent deviation. By setting the reinforcing ribs, the strength of the mounting seat can be increased, and at the same time, it can play a guiding role, so that the up and down movement of the mounting seat is smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a large-scale tubular pump with a gear transmission structure of the present invention; Figure 2 A schematic diagram of the internal structure of a large-scale tubular pump with a gear transmission structure according to the present invention; Figure 3 A large-scale through-flow pump with a gear transmission structure according to the present invention Figure 2 A schematic diagram of the enlarged structure of the middle A area; Figure 4 A large-scale through-flow pump with a gear transmission structure according to the present invention Figure 2 Schematic diagram of the enlarged structure of the middle B area; Figure 5 It is a three-dimensional structural schematic diagram of an impeller in a large-scale tubular pump of a gear transmission structure of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of a pump casing in a large-scale tubular pump of a gear transmission structure of the present invention; Figure 7 The present invention is a schematic diagram of the three-dimensional structure of a mounting seat in a large-scale through-flow pump with a gear transmission structure.

[0019] In the figure: 1. Pump casing; 2. Suction chamber; 3. Guide vane body; 4. Sleeve; 5. Drive motor; 6. Mounting frame; 7. Supporting bottom plate; 8. Side connecting plate; 9. Cross plate; 10. Screw rod; 11. Mounting seat; 12. Reinforcement rib; 13. Universal wheel; 14. End limit ring; 15. Guide cylinder; 16. Impeller; 17. Pump shaft; 18. Inner support ring; 19. Pressure cover; 20. Sealing ring; 21. No. 1 bevel gear; 22. No. 2 bevel gear; 23. Shaft head nut; 24. Side retaining ring; 25. Inner impeller body; 26. Bearing; 27. Threaded hole; 28. Side cover; 29. ​​Inner support frame; 30. Through groove; 31. Limiting card plate; 32. Side sealing groove; 33. Fixed sliding hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Reference Figure 1 - Figure 6 As shown: a large-scale cross-flow pump with a gear transmission structure, including a pump casing 1, the upper end of the pump casing 1 is fixedly connected to a mounting frame 6, the upper end of the mounting frame 6 is fixedly connected to a driving motor 5, both sides of the middle of the inner ring surface of the pump casing 1 are fixedly connected to inner support rings 18, an impeller 16 is arranged inside the pump casing 1, the outer surface of the impeller 16 is fixedly connected to a first bevel gear 21, a shaft head nut 23 and a second bevel gear 22 are arranged at the output end of the driving motor 5, the driving motor 5 is fixedly connected to the second bevel gear 22 through the shaft head nut 23, the shaft head nut 23 is meshed with the first bevel gear 21, side retaining rings 24 are installed on both sides of the impeller 16, the outer surface of the side retaining ring 24 is in contact with the inner surface of the inner support ring 18, an inner impeller body 25 is fixedly connected to the inside of the impeller 16, a pump shaft 17 is arranged inside the inner impeller body 25, and the driving motor 5 can use a dry motor or a submersible motor according to the use environment.

[0022] In the present invention, by setting the No. 1 bevel gear 21 and the No. 2 bevel gear 22, the torque of the driving motor 5 is transmitted to the impeller 16 by adopting the bevel gear transmission, the impeller 16 rotates while the pump shaft 17 does not rotate. In this way, there is no need to consider the torque when designing the pump shaft 17. By selecting the No. 1 bevel gear 21 and the No. 2 bevel gear 22 with different speed ratios, the rotation speed of the driving motor 5 can be increased, and the cost of the driving motor 5 can be reduced to a great extent. It not only solves the problems of the difficulty in designing the motor of a large wet stator submersible full-flow pump, the difficulty in production and processing, the bulky motor, and the high cost of water-resistant line, but also retains the compact structure of the submersible full-flow pump, reduces the influence of the wet motor efficiency on the pump efficiency, and has the characteristics of compact structure, convenient installation, safety and reliability, high efficiency, etc.

[0023] Embodiment 2: Figure 1 - Figure 6 As shown, bearings 26 are fixedly connected to both sides of the inner impeller body 25, the pump shaft 17 is fixedly connected to the inner ring surface of the bearing 26, the water suction chamber 2 and the guide vane body 3 are fixedly connected to both sides of the pump housing 1, the inside of the water suction chamber 2 and the guide vane body 3 are fixedly connected to the sleeve 4, the inside of the sleeve 4 is fixedly connected to the inner support frame 29, the two ends of the pump shaft 17 are fixedly connected to the two inner support frames 29, the side covers 28 are installed between the two sleeves 4 and the two ends of the inner impeller body 25, and the inner edges of the two inner support rings 18 away from the first bevel gear 21 are provided with side sealing grooves 32 A sealing ring 20 is arranged inside the side sealing groove 32, and a pressure cover 19 is fixedly connected to one side of the two inner support rings 18. One side of the pressure cover 19 squeezes the sealing ring 20. The arrangement of the inner support frame 29 can increase the stability of the pump shaft 17 during use. An oil chamber is formed between the inner support ring 18, the impeller 16, and the side retaining ring 24, and is sealed by the sealing ring 20. In this way, when in use, lubricating oil can be placed there, which is convenient for heat conversion between the first bevel gear 21 and the second bevel gear 22, thereby increasing the service life of the first bevel gear 21 and the second bevel gear 22.

[0024] Embodiment 3: According to Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, a receiving base plate 7 is provided at the bottom of the pump housing 1, and side connecting plates 8 are fixedly connected between the middle sides of the upper end of the receiving base plate 7 and the pump housing 1, and transverse plates 9 are fixedly connected inside the two side connecting plates 8, and a screw rod 10 is rotatably connected between the transverse plate 9 and the receiving base plate 7, and a through groove 30 is provided inside the receiving base plate 7. A mounting seat 11 is provided above the receiving base plate 7, and a threaded hole 27 is provided in the middle of the mounting seat 11, and the threaded hole 27 is engaged with the screw rod 10, and both sides of the middle part of the lower end of the mounting seat 11 are fixedly connected with limited clamping plates 31, and the limited clamping plates 31 are clamped with the through groove 30, and the lower end of the through groove 30 is fixedly connected with a universal wheel 13, and both sides of the middle part of the upper end of the mounting seat 11 are fixedly connected with reinforcing ribs 12, and the four corners of the receiving base plate 7 are provided with fixed sliding holes 33, and the fixed sliding holes 33 are slidably connected inside. The guide cylinder 15 has an end limit ring 14 fixedly connected to its upper end. The side surfaces of the mounting seat 11 and the reinforcing ribs 12 are in contact with the side connecting plate 8. Through the arrangement of the screw rod 10 and the guide cylinder 15, when moving, the mounting seat 11 can be moved down to expose the universal wheel 13, which is in contact with the ground and can be moved. During installation, the positioning can be completed by plugging the guide cylinder 15 with the bolts at the mounting position. Subsequently, the universal wheel 13 can be retracted to connect the bolts with the fixed sliding holes 33. In this way, there is no need to gradually carry and adjust, so as to facilitate installation and use. Through the arrangement of the limit clamping plate 31, the stability of the connection with the receiving base plate 7 can be increased to prevent deviation. Through the arrangement of the reinforcing ribs 12, the strength of the mounting seat 11 can be increased, and at the same time, it can play a guiding role, so that the up and down movement of the mounting seat 11 is smoother.

[0025] The usage and working principle of this device: During installation, the screw rod 10 is rotated until the limit card plate 31 is connected to the through groove 30. At this time, the universal wheel 13 is supported to push the water absorption chamber 2 or the guide vane body 3 to move. After moving to the installation location, the guide cylinder 15 is inserted into the fixed sliding hole 33 until the guide cylinder 15 is plugged into the bolt, and then the screw rod 10 is rotated until the receiving base plate 7 contacts the ground. After the mounting seat 11 is fully raised, the downward movement of the receiving base plate 7 is limited by the guide cylinder 15, thereby ensuring that the bolt is always located in the fixed sliding hole 33. When the lower end of the receiving base plate 7 contacts the ground, the bolt connection nut can be fixed. When in use, the drive motor 5 is started to drive the impeller 16 to rotate, so that water flows into the water absorption chamber 2 and flows out of the guide vane body 3.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-scale cross-flow pump with a gear transmission structure, comprising a pump casing (1), characterized in that: The upper end of the pump housing (1) is fixedly connected to a mounting frame (6), the upper end of the mounting frame (6) is fixedly connected to a driving motor (5), both sides of the middle of the inner annular surface of the pump housing (1) are fixedly connected to inner support rings (18), an impeller (16) is arranged inside the pump housing (1), the outer surface of the impeller (16) is fixedly connected to a first bevel gear (21), an output end of the driving motor (5) is provided with a shaft head nut (23) and a second bevel gear (22), the driving motor (5) is fixedly connected to the second bevel gear (22) through the shaft head nut (23), the shaft head nut (23) is meshed with the first bevel gear (21), side retaining rings (24) are installed on both sides of the impeller (16), the outer surface of the side retaining ring (24) is in contact with the inner surface of the inner support ring (18), the interior of the impeller (16) is fixedly connected to an inner impeller body (25), and a pump shaft (17) is arranged inside the inner impeller body (25).

2. The large-scale through-flow pump with a gear transmission structure according to claim 1, characterized in that: The inner impeller body (25) is fixedly connected to bearings (26) on both sides, the pump shaft (17) is fixedly connected to the inner annular surface of the bearing (26), the pump housing (1) is fixedly connected to a water suction chamber (2) and a guide vane body (3) on both sides, and the water suction chamber (2) and the guide vane body (3) are fixedly connected to the inside of the water suction chamber (2) and the guide vane body (3) with sleeves (4).

3. The large-scale through-flow pump with a gear transmission structure according to claim 2 is characterized in that: An inner support frame (29) is fixedly connected inside the sleeve (4), two ends of the pump shaft (17) are respectively fixedly connected to the two inner support frames (29), and side covers (28) are installed between the two sleeves (4) and the two ends of the inner impeller body (25).

4. The large-scale through-flow pump with a gear transmission structure according to claim 2, characterized in that: A side sealing groove (32) is formed at the inner edge of the two inner support rings (18) on the side away from the first bevel gear (21), and a sealing ring (20) is arranged inside the side sealing groove (32).

5. The large-scale through-flow pump with a gear transmission structure according to claim 4, characterized in that: One side of each of the two inner support rings (18) is fixedly connected to a pressure cover (19), and one side of the pressure cover (19) squeezes a sealing ring (20).

6. The large-scale through-flow pump with a gear transmission structure according to claim 1, characterized in that: A receiving bottom plate (7) is provided below the pump housing (1), and side connecting plates (8) are fixedly connected between the middle two sides of the upper end of the receiving bottom plate (7) and the pump housing (1).

7. The large-scale through-flow pump with a gear transmission structure according to claim 6, characterized in that: The insides of the two side connecting plates (8) are both fixedly connected with a transverse plate (9), and a screw rod (10) is rotatably connected between the transverse plate (9) and the receiving bottom plate (7).

8. The large-scale through-flow pump with a gear transmission structure according to claim 7, characterized in that: A through groove (30) is provided inside the receiving bottom plate (7), a mounting seat (11) is provided above the receiving bottom plate (7), a threaded hole (27) is provided in the middle of the mounting seat (11), and the threaded hole (27) is meshed with the screw rod (10).

9. The large-scale through-flow pump with a gear transmission structure according to claim 8, characterized in that: A limiting clamping plate (31) is fixedly connected to both sides of the middle of the lower end of the mounting seat (11), the limiting clamping plate (31) is clamped with the through slot (30), a universal wheel (13) is fixedly connected to the lower end of the through slot (30), and a reinforcing rib (12) is fixedly connected to both sides of the middle of the upper end of the mounting seat (11).

10. The large-scale through-flow pump with a gear transmission structure according to claim 6, characterized in that: The four corners of the receiving bottom plate (7) are each provided with a fixed sliding hole (33), the interior of the fixed sliding hole (33) is slidably connected to a guide cylinder (15), and the upper end of the guide cylinder (15) is fixedly connected to an end limit ring (14).

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