Impeller of split centrifugal pump

Abstract

The utility model discloses a kind of impellers of split centrifugal pump, including impeller disc, the fixed barrel is fixedly arranged in impeller disc one side, the fixed barrel is provided with a plurality of rotary leaves around, the rotary leaves are fixed in the one side of the impeller disc, characterized by, the fixed barrel is provided with impeller bore, the first hole is communicated and is provided in the one side of the impeller bore, the keyway is provided in the first hole, further including split centrifugal pump, split centrifugal pump is fixedly provided with the planetary gear reducer of speed increasing, planetary gear reducer is set to the inside of split centrifugal pump, the output shaft of planetary gear reducer is fixedly connected with impeller by end cover assembly after passing through impeller, planetary gear reducer is set to the inside of impeller bore, impeller rotates outside planetary gear reducer.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump impeller technology, specifically an impeller for a split-type centrifugal pump. Background Technology

[0002] In the fields of liquid transportation and fluid control, centrifugal pumps are one of the core pieces of equipment, and their performance and reliability are of paramount importance. While existing split-type centrifugal pumps meet industrial needs to a certain extent, many problems still exist in practical applications:

[0003] 1. Low space utilization: In traditional centrifugal pump designs, planetary gear reducers are usually placed externally on the pump body. This not only increases the overall size of the equipment but also leads to wasted space, especially in space-constrained installation environments.

[0004] 2. Low power transmission efficiency: A long transmission path can easily cause output shaft runout, which not only reduces power transmission efficiency but may also cause vibration and noise problems, affecting the stability and reliability of the equipment.

[0005] 3. Insufficient structural strength and stability: The power input flange of the existing reducer is designed separately from the housing, which is prone to errors during assembly, affecting structural stability and operating accuracy.

[0006] In summary, existing split-type centrifugal pumps have significant shortcomings in terms of space utilization, power transmission efficiency, and structural strength, making it difficult to meet actual needs. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a split centrifugal pump that can optimize spatial layout, enhance power transmission efficiency and facilitate installation and maintenance, which can solve the problems in the prior art.

[0008] This utility model is achieved through the following technical solution: An impeller for a split-type centrifugal pump includes an impeller disk, a fixed cylinder fixedly disposed on one side of the impeller disk, and multiple rotating blades disposed around the fixed cylinder. The rotating blades are fixed to one side of the impeller disk. The fixed cylinder contains an impeller inner hole, and one side of the impeller inner hole is connected to a first hole with a keyway. The pump also includes a split-type centrifugal pump, in which a planetary gear reducer for speed increase is fixedly disposed. The planetary gear reducer is located inside the split-type centrifugal pump, and its output shaft passes through the impeller and is fixedly connected to the impeller via an end cover assembly. The planetary gear reducer is disposed within the impeller inner hole, and the impeller rotates outside the planetary gear reducer.

[0009] A further technical solution is provided: the split centrifugal pump includes a housing, a pump chamber is provided inside the housing, an input flange is detachably and fixedly connected to one side of the pump chamber, an output flange is detachably and fixedly connected to the top of the housing, and a planetary gear reducer is fixedly installed inside the pump chamber.

[0010] A further technical solution includes an end cap assembly comprising an end cap with an end threaded hole inside. A flange is fixedly provided on one side of the fixed cylinder, and the end cap is snapped into the flange. The output shaft of the planetary gear reducer is snapped into the keyway via a key and passes through the first hole and is connected to the power of the fixed cylinder. The output shaft of the planetary gear reducer extends out of the first hole, and its outer surface is provided with a thread. The output shaft is threadedly connected to the end threaded hole via the thread.

[0011] In a further technical solution, an inner sealing ring is fixedly provided inside the end cap, and the inner sealing ring is located outside the threaded hole at the end.

[0012] In a further technical solution, the inner sealing ring is located between the outer surface of the end cap and the end threaded hole.

[0013] In a further technical solution, an outer sealing ring is fitted and fixed on the outer surface of the end cap and the flange, and the outer sealing ring is fixed to the outer surface of the flange and the end cap.

[0014] The beneficial effects of this utility model are as follows: First, after the planetary gear reducer is fixedly installed in the split centrifugal pump and located inside the impeller, the impeller rotates outside the planetary gear reducer, effectively isolating the liquid from the planetary gear reducer. This not only drives the impeller but also prevents the planetary gear reducer from protruding too much from the outside of the split centrifugal pump, saving space. Second, the shorter output shaft is directly connected to the impeller, facilitating efficient and direct power transmission and avoiding increased output shaft runout caused by a longer transmission path.

[0015] II. Utilizing the structural design of the impeller and planetary gear reducer, a single-sided closed impeller structure is formed by the impeller disk, fixed cylinder, and vortex blades. The fixed cylinder has an impeller inner hole for housing the planetary gear reducer, and also includes a first hole, keyway, and end cover assembly. This effectively improves the sealing effect of the fixed connection between the planetary gear reducer and the impeller, and also facilitates the installation and replacement of the impeller. The slot allows personnel to use an internal hexagonal socket to rotate the end cover.

[0016] Third, the structural design of the planetary gear reducer is to form an integral structure between the power input flange and the housing, which serves as the positioning reference for the input end. This facilitates the connection of the motor's input shaft and avoids assembly errors caused by installing the reducer flange and the power input flange separately. By directly forming the two into one part, the structural stability is enhanced.

[0017] IV. During installation, the second hole and the first housing are installed sequentially within the pump cavity. The inner ring of the second housing is significantly larger than the diameter of the first rotating frame. Therefore, the first rotating frame can be installed in the second housing after passing through it and rotating. Then, the first housing is installed on one side of the second housing. A sealing ring is provided at the rotatable connection between the second rotating frame and the first housing, and the planetary gear meshes with the gear ring. This achieves the installation of the fourth shaft, the third shaft, the second rotating frame, the planetary gear, the connecting rod, and the first rotating frame. Then, the first shaft, the square hole, the second shaft, and the power gear are rotatably installed within the power input flange. The second shaft and the power gear pass through the through hole in the first rotating frame, and the power gear meshes with the planetary gear. Through the above structure, the process of fixing the planetary gear reducer in the split centrifugal pump is realized. The transmission structure and the input structure are installed on both sides respectively. Then, the transmission structure is covered and protected by the detachable connection of the power input flange, the second housing, and the first housing. This satisfies the convenience of installation while improving the isolation effect from the external space. Attached Figure Description

[0018] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the impeller of a split-type centrifugal pump according to the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the rear structure of the intermediate impeller;

[0021] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the intermediate impeller;

[0022] Figure 4 for Figure 1 A schematic diagram of the structure after the intermediate impeller is installed in a split centrifugal pump;

[0023] Figure 5 for Figure 4 A schematic diagram of the first cross-sectional structure of the equipment;

[0024] Figure 6 for Figure 5 A schematic diagram at point A in the middle;

[0025] Figure 7 for Figure 4 A schematic diagram of the second cross-sectional structure of the equipment;

[0026] Figure 8 for Figure 7 A schematic diagram at point B in the middle;

[0027] Figure 9 This is a schematic diagram of a split-type centrifugal pump.

[0028] In the figure, the components are: impeller inner hole 11, impeller disk 12, first hole 13, blade 15, keyway 16, end cover 17, slot 18, fixed cylinder 19, flange 21, end threaded hole 22, inner sealing ring 23, outer sealing ring 24, housing 31, pump chamber 32, output flange 34, power input flange 41, square hole 43, first shaft 44, first rotating frame 45, planetary gear 46, gear ring 47, power gear 48, third shaft 49, second rotating frame 51, first housing 53, second housing 54, second shaft 55, fourth shaft 61, internal threaded hole 62, connecting rod 63, stepped hole 64, and second hole 65. Detailed Implementation

[0029] like Figures 1-9 As shown, this utility model will be described in detail. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The impeller of this utility model, a split-type centrifugal pump, has the following components: an impeller disk 12, a fixed cylinder 19 fixedly mounted on one side of the impeller disk 12, multiple blades 15 arranged around the fixed cylinder 19, the blades 15 fixed to one side of the impeller disk 12, an impeller inner hole 11 provided inside the fixed cylinder 19, a first hole 13 connected to one side of the impeller inner hole 11, a keyway 16 provided inside the first hole 13, and a split-type centrifugal pump. A planetary gear reducer for speed increase is fixedly mounted inside the split-type centrifugal pump. The output shaft of the planetary gear reducer passes through the impeller and is fixedly connected to the impeller through an end cover assembly. The impeller is fitted onto the outside of the planetary gear reducer through the impeller inner hole 11.

[0030] Advantageously, the split-type centrifugal pump includes a housing 31, a pump chamber 32 is provided inside the housing 31, an input flange 33 is detachably fixedly connected to one side of the pump chamber 32, and an output flange 34 is detachably fixedly connected to the top of the housing 31. The input end is connected through the input flange 33, and the output end flange 34 is connected to the output end. A planetary gear reducer is fixedly installed inside the pump chamber 32, and an impeller is sleeved on the outside of the planetary gear reducer and fixedly connected to its output shaft, so that the impeller rotates inside the pump chamber 32 to achieve the centrifugal pumping function.

[0031] Advantageously, the planetary gear reducer includes a power input flange 41, a second housing 54, and a first housing 53. The power input flange 41, the second housing 54, and the first housing 53 are fixedly connected by fasteners to form a housing. The planetary gear reducer also includes a third shaft 49 rotatably disposed in the first housing 53. A fourth shaft 61 is fixedly disposed at the end of the third shaft 49. The third shaft 49 is provided with a key and is engaged with the first hole 13 and the keyway 16. The fourth shaft 61 is threadedly connected to the end threaded hole 22. A speed-increasing component is provided on one side of the third shaft 49. The power input flange 41 is integrally formed and fixed in the housing 31.

[0032] Advantageously, the speed-increasing component includes a second rotating frame 51 and a first rotating frame 45, which are rotatably disposed within a second housing 54. Multiple connecting rods 63 are fixedly disposed between the second rotating frame 51 and the first rotating frame 45. Three planetary gears 46 are rotatably disposed between the second rotating frame 51 and the first rotating frame 45. A gear ring 47 is fixedly disposed on the inner side of the second housing 54, meshing with the planetary gears 46. A through hole is provided inside the first rotating frame 45, and a second shaft 55 is movably disposed within the through hole. A power gear 48 is fixedly disposed at the end of the second shaft 55, meshing with the planetary gears 46. The number of teeth on the power gear 48 is greater than the number of teeth on the planetary gears 46. The second shaft 55 is rotatably disposed in a power input flange 41 via an input shaft structure.

[0033] Advantageously, the input shaft structure includes a first shaft 44 fixedly disposed on one side of the first rotating frame 45, the first shaft 44 being rotatably disposed in the power input flange 41, the first shaft 44 having a square hole 43, the power input flange 41 having a mounting hole for mounting a motor, the output shaft of the motor extending into the square hole 43 and being powered connected.

[0034] Advantageously, the first shaft 44 is located on the side away from the power gear 48.

[0035] Advantageously, the first housing 53 is provided with an internal threaded hole 62, the second housing 54 is provided with a second hole 65, and the power input flange 41 is provided with a stepped hole 64. By providing a long bolt, passing through the stepped hole 64 and the second hole 65, it is threadedly connected to the internal threaded hole 62.

[0036] Advantageously, the end cap assembly includes an end cap 17, which has an end threaded hole 22. A flange 21 is fixedly provided on one side of the fixed cylinder 19. The end cap 17 is snapped into the flange 21. The output shaft of the planetary gear reducer is snapped into the keyway 16 by a key, passes through the first hole 13 and is connected to the power of the fixed cylinder 19. The output shaft of the planetary gear reducer extends out of the first hole 13 and has a thread on its outer surface. The output shaft is threadedly connected to the end threaded hole 22 by the thread.

[0037] Advantageously, an inner sealing ring 23 is fixedly provided inside the end cap 17. The inner sealing ring 23 is located outside the end threaded hole 22 and is located between the outer surface of the end cap 17 and the end threaded hole 22.

[0038] Advantageously, an outer sealing ring 24 is fitted and fixed on the outer surface of the end cap 17 and the flange 21, and the outer sealing ring 24 is tightened and fixed to the outer surface of the flange 21 and the end cap 17 by elastic force.

[0039] The impeller houses a planetary gear reducer within its inner bore 11. The third shaft 49 of the planetary gear reducer, after being keyed, engages with the first bore 13 and keyway 16, transmitting power from the planetary gear reducer to the fixed cylinder 19 via the keyway 16 and the first bore 13. A fourth shaft 61 at one end of the third shaft 49 passes through the first bore 13 and is threaded into the end threaded hole 22. An inner sealing ring 23 is provided on the inner side of the end cover 17, and an outer sealing ring 24 is provided on the outer side of the end cover 17, sealing both the inner and outer sides of the connection between the flange 21 and the end cover 17. After the planetary gear reducer is fixedly installed in the split-type centrifugal pump and located within the impeller inner bore 11, it not only drives the impeller but also prevents the planetary gear reducer from protruding too much beyond the outer side of the split-type centrifugal pump, saving space. A shorter output shaft is used for direct connection to the impeller, facilitating efficient and direct power transmission.

[0040] When the split-type centrifugal pump is working, the motor is connected to one side of the power input flange 41. The output shaft of the motor extends into the square hole 43 and is powered. After the motor starts working, it drives the first shaft 44 to rotate. Since the first shaft 44, the second shaft 55 and the power gear 48 form an integrated structure, the power gear 48 rotates. Since the power gear 48 meshes with the planetary gear 46 and the planetary gear 46 meshes with the gear ring 47, and since the number of teeth of the power gear 48 is greater than the number of teeth of the planetary gear 46, the speed at which the planetary gear 46 rolls between the power gear 48 and the gear ring 47 increases. Since the planetary gear 46 is connected between the first rotating frame 45 and the second rotating frame 51, it drives the second rotating frame 51, the third shaft 49 and the fourth shaft 61 to rotate at an increased speed. Since the third shaft 49 is powered to the impeller through the first hole 13 and the keyway 16, and the end threaded hole 22 is threadedly connected to the fourth shaft 61, the impeller is fixed and pressed against one side of the third shaft 49 and the fourth shaft 61.

[0041] After the impeller rotates, the liquid input at the inlet flange 33 can be pumped out from the outlet flange 34. Pipes can be connected to one side of the inlet flange 33 and the outlet flange 34 for transporting liquid.

[0042] Under different operating conditions, the sealing, corrosion resistance, and rust prevention levels of planetary gear reducers can be selected. For liquid environments with high water content, rust prevention treatment is used; for corrosion resistance, corrosion resistance treatment is used; and for high-pressure environments, strong sealing treatment is used. The above treatment methods are conventional technical methods in the field of planetary gear reducers.

[0043] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the protection scope of this utility model; therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. An impeller for a split-type centrifugal pump, comprising an impeller disc (12), a fixed cylinder (19) fixedly disposed on one side of the impeller disc (12), and a plurality of swivel blades (15) disposed around the fixed cylinder (19), the swivel blades (15) being fixed to one side of the impeller disc (12), characterized in that, The fixed cylinder (19) is provided with an impeller inner hole (11), and a first hole (13) is provided on one side of the impeller inner hole (11). A keyway (16) is provided in the first hole (13). The system also includes a split centrifugal pump. A planetary gear reducer with speed-increasing function is fixedly provided in the split centrifugal pump. The planetary gear reducer is located inside the split centrifugal pump. The output shaft of the planetary gear reducer passes through the impeller and is fixedly connected to the impeller through an end cover assembly. The planetary gear reducer is located inside the impeller inner hole (11), and the impeller rotates outside the planetary gear reducer.

2. The impeller of a split-type centrifugal pump according to claim 1, characterized in that: The split centrifugal pump includes a housing (31), a pump chamber (32) is provided inside the housing (31), an input flange (33) is detachably fixedly connected to one side of the pump chamber (32), an output flange (34) is detachably fixedly connected to the top of the housing (31), and a planetary gear reducer is fixedly installed inside the pump chamber (32).

3. The impeller of a split-type centrifugal pump according to claim 1, characterized in that: The end cap assembly includes an end cap (17), which has an end threaded hole (22). A flange (21) is fixedly provided on one side of the fixed cylinder (19). The end cap (17) is snapped into the flange (21). The output shaft of the planetary gear reducer is snapped into the keyway (16) by a key. After passing through the first hole (13), it is connected to the power of the fixed cylinder (19). The output shaft of the planetary gear reducer extends out of the first hole (13) and has a threaded line on its outer surface. The output shaft is threadedly connected to the end threaded hole (22) by the threaded line.

4. The impeller of a split-type centrifugal pump according to claim 3, characterized in that: An inner sealing ring (23) is fixedly provided inside the end cap (17), and the inner sealing ring (23) is located on the outside of the end threaded hole (22).

5. The impeller of a split-type centrifugal pump according to claim 4, characterized in that: The inner sealing ring (23) is located between the outer surface of the end cap (17) and the end threaded hole (22).

6. The impeller of a split-type centrifugal pump according to claim 3, characterized in that: An outer sealing ring (24) is fitted and fixed on the outer surface of the end cap (17) and the flange (21), and the outer sealing ring (24) is fixed to the outer surface of the flange (21) and the end cap (17).

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