Segmented connecting structure for long shaft of large-shaft submerged pump

Abstract

The utility model relates to the technical field of mechanical equipment, and discloses a large-shaft submerged pump long shaft segmented connecting structure which comprises a protective cover, a motor is arranged in the protective cover, a long shaft is arranged at the output end of the motor, and a cushioning mechanism is arranged outside the long shaft and used for relieving vibration generated during high-speed rotation. A filtering mechanism is arranged outside the long shaft and is used for filtering impurities such as silt in water; the long shaft is formed by connecting a plurality of carbon steel sections, and the connecting positions of the long shaft are connected through flanges. Through mutual cooperation of the cushioning block, the spring, the connecting rod and the fixing block in the cushioning mechanism, the cushioning block is tightly attached to the outer wall of the long shaft, the spring absorbs vibration energy generated by high-speed rotation of the long shaft through elastic deformation, the connecting rod provides stable guidance for stretching and retracting of the spring, and the fixing block is matched to limit the range of the spring; and the staggered distribution of the semicircular structures does not influence water flow.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical equipment technical field especially relates to a long shaft segmented connecting structure of big shaft submergence pump long shaft. BACKGROUND

[0002] In the important water and electricity equipment field such as water turbine and water power generator, the performance of long shaft and the reliability of connecting structure play a decisive role for the stable operation of the whole system.

[0003] In the operation process of water turbine, the strong impact force and uneven force of water flow will be transmitted to long shaft, so that long shaft bears complex stress change when rotating at high speed, thereby generating relatively violent vibration, similarly, due to the action of electromagnetic force and the cooperative work with water turbine, long shaft will also be in high-frequency vibration state when water power generator is running, the previous connecting mode often appears the loosening of connecting component when coping with such vibration, the loosening of connecting component not only will lead to the instability of power transmission, causes energy loss, reduces the power generation efficiency of equipment, but also can cause abnormal noise and mechanical failure of equipment, seriously threatens the safe operation of equipment, even can lead to the shutdown of whole water and electricity system, brings huge impact to power supply, influences the normal order of social production and life.

[0004] In addition, the working environment of water turbine and water power generator, water often carries a large amount of silt, impurities, etc., these impurities will impact long shaft and related components under the driving of water flow, when the silt and other impurities in water enter the inside of equipment, will aggravate the wear and tear between components, especially causes serious damage to the surface of long shaft and sealing part, the aging speed of sealing material obviously accelerates under the erosion of impurities and long-term mechanical action, the decline of sealing performance will lead to equipment leakage, air leakage and other problems, further influence the normal operation of equipment, increase the maintenance cost and repair difficulty of equipment, reduce the reliability and service life of equipment, restrict the sustainable development of water and electricity industry.

[0005] Therefore, in order to meet the high requirements of water turbine and water power generator to long shaft connecting structure, it is urgent to develop a new long shaft segmented connecting structure of big shaft submergence pump long shaft. UTILITY MODEL CONTENT

[0006] In order to make up for the above shortcomings, the utility model provides a long shaft segmented connecting structure of big shaft submergence pump long shaft, aims at improving the problems that the connecting component of long shaft is easy to loosen under the influence of long-term vibration in prior art and the aging of sealing material is accelerated by water impurities.

[0007] In order to achieve the above object, the utility model discloses the following technical scheme: a long shaft segmented connection structure of large shaft submersible pump, including the protection cover, the inside of protection cover is provided with motor, the output of motor is provided with long shaft, the outside of long shaft is provided with damping mechanism, and it is used for relieving the vibration produced when high -speed rotation, the outside of long shaft is provided with filter mechanism, and it is used for filtering the silt and other impurities in water.

[0008] The long shaft is composed of a plurality of carbon steel segments connected by flanges.

[0009] As a further description of the above technical scheme: the damping mechanism includes damping blocks, the damping blocks are installed on the outer wall of the long shaft, the inner wall of the damping blocks is provided with a buffer groove, one end of the spring is fixedly connected to the inner wall of the buffer groove, one end of the connecting rod is slidably connected to the inner wall of the buffer groove, the other end of the spring is fixedly connected to a fixed block, and the other end of the connecting rod is fixedly connected to the outer wall of the fixed block.

[0010] As a further description of the above technical scheme: the filter mechanism includes a pump shell, the pump shell is connected to the outer wall of the protection cover, the outer wall of the pump shell is connected to a filter cavity, the outer wall of the filter cavity is connected to a water suction port, one end of the long shaft is fixedly connected to an impeller, the impeller is installed in the inner portion of the water suction port, a filter screen is fixedly connected to the inner portion of the filter cavity, an annular flow guide plate is fixedly connected to the inner portion of the filter cavity, and the outer wall of the annular flow guide plate is fixedly connected to a sand guide plate.

[0011] As a further description of the above technical scheme: the outer wall of the annular flow guide plate is provided with a plurality of holes, and a plurality of sand guide plates are arranged around the outer wall of the annular flow guide plate, wherein the spiral direction of the sand guide plates is opposite to the rotation direction of the impeller.

[0012] As a further description of the above technical scheme: the outer wall of the pump shell is provided with a water drain valve, and the inner wall of the pump shell is fixedly connected to a fixed block.

[0013] As a further description of the above technical scheme: the pump shell is arranged around the outer portion of the long shaft, and the pump shell is composed of a plurality of cast iron segments connected by flanges.

[0014] As a further description of the above technical scheme: the outer wall of the long shaft is provided with a water blocking plate, and the outer wall of the water blocking plate is fixedly connected to the pump shell.

[0015] The utility model has the advantages of:

[0016] 1. The long shaft of the utility model is connected by the mutual cooperation of the shock absorbing block, spring, connecting rod and fixed block in the shock absorbing mechanism, the shock absorbing block is closely attached to the outer wall of the long shaft, the spring absorbs the vibration energy generated by the high-speed rotation of the long shaft by elastic deformation, the connecting rod provides stable guidance for the expansion and contraction of the spring, the fixed block cooperates to limit the range of the spring, and the staggered distribution of the semicircular structure does not affect the water flow, effectively reduces the vibration transmission, prevents the loosening of the connecting parts due to long-term vibration, and maintains the stable operation of the equipment.

[0017] 2. The utility model discloses a pump shell provides support and flow guide, its cast iron material and flange connection ensure that the structure is stable, the sealing is good, the filter screen in the filter chamber that is connected with it intercepts large particle impurities and protects the inside of the pump body, the small hole of the annular flow guide plate cooperates with the sand guide plate to guide the water flow and impurities, so that the fine impurities are gathered and settled, the erosion of the impurities in the water to the sealing material is effectively reduced, the aging speed is reduced, and the normal and efficient operation of the pump body is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A side view of a long shaft segmented connection structure of a large shaft submersible pump is provided for the utility model;

[0019] Figure 2 A front view of a long shaft segmented connection structure of a large shaft submersible pump is provided for the utility model;

[0020] Figure 3 A schematic view of a long shaft segmented connection structure of a large shaft submersible pump is provided for the utility model;

[0021] Figure 4 A schematic view of a shock absorbing structure in a long shaft segmented connection structure of a large shaft submersible pump is provided for the utility model.

[0022] LEGEND:

[0023] 1, protective cover, 2, motor, 3, long shaft, 4, shock absorbing block, 5, spring, 6, connecting rod, 7, fixed block, 8, pump shell, 9, filter chamber, 10, water suction port, 11, impeller, 12, filter screen, 13, annular flow guide plate, 14, sand guide plate, 15, water drain valve, 16, water blocking plate. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0025] REFERENCE Figures 1-4The utility model provides a kind of embodiment: a long shaft segmented connection structure of large shaft submersible pump, including protective cover 1, the inside of protective cover 1 is provided with motor 2, the output of motor 2 is provided with long shaft 3, the outside of long shaft 3 is provided with damping mechanism, it is used to alleviate vibration generated when high speed rotates, the outside of long shaft 3 is provided with filtering mechanism, it is used to filter silt and other impurities in water;

[0026] Long shaft 3 is connected by multiple carbon steel segments, and the connecting part of long shaft 3 adopts flange connection.

[0027] Damping mechanism includes damping block 4, damping block 4 is installed on the outer wall of long shaft 3, the inner wall of damping block 4 is provided with buffer groove, one end of spring 5 is fixedly connected to the inner wall of buffer groove, one end of connecting rod 6 is slidably connected to the inner wall of buffer groove, the other end of spring 5 is fixedly connected with fixed block 7, and the other end of connecting rod 6 is fixedly connected to the outer wall of fixed block 7.

[0028] The outer wall of pump shell 8 is provided with water drain valve 15, and the inner wall of pump shell 8 is fixedly connected with fixed block 7.

[0029] Reference Figure 3 And Figure 4 , specifically, long shaft 3 is connected by multiple carbon steel segments, and the connecting part of long shaft 3 adopts flange connection.

[0030] The outer wall of pump shell 8 is provided with water drain valve 15, and the inner wall of pump shell 8 is fixedly connected with fixed block 7.

[0031] Filtering mechanism includes pump shell 8, and pump shell 8 is communicated to the outer wall of protective cover 1, the outer wall of pump shell 8 is communicated with filter cavity 9, the outer wall of filter cavity 9 is communicated with water suction port 10, one end of long shaft 3 is fixedly connected with impeller 11, impeller 11 is installed in the inner portion of water suction port 10, filter screen 12 is fixedly connected in the inner portion of filter cavity 9, annular flow guide plate 13 is fixedly connected in the inner portion of filter cavity 9, and the outer wall of annular flow guide plate 13 is fixedly connected with sand guide plate 14.

[0032] The outer wall of annular flow guide plate 13 is provided with a plurality of holes, a plurality of sand guide plates 14 are arranged around the outer wall of annular flow guide plate 13, and the spiral direction of sand guide plate 14 is opposite to the rotation direction of impeller 11.

[0033] The pump shell 8 is connected by multiple cast iron segments and is connected by flanges at the joints.

[0034] The outer wall of the long shaft 3 is provided with a water blocking plate 16, and the outer wall of the water blocking plate 16 is fixedly connected with the pump shell 8.

[0035] Reference Figure 2 Specifically, in the filtering mechanism, the pump shell 8 surrounds the long shaft 3 and is connected by cast iron segments and sealed by flanges. The cast iron is strong and corrosion-resistant, and the flange connection is stable and leak-proof, preventing deformation and leakage. The pump shell 8 is connected to the outer wall of the protective cover 1 and plays a supporting and flow guiding role. The water blocking plate 16 on the outer wall of the long shaft 3 is connected to the pump shell 8, which blocks the water flow into the motor 2, ensures the normal operation of the motor, enhances the stability, and ensures the safety of the equipment. The filtering cavity 9 on the outer wall of the pump shell 8 is a container for impurity filtration, and the internal filter screen 12, annular flow guide plate 13 and sand guide plate 14 cooperate to ensure water purity and prevent impurities from damaging pump body components. The water inlet 10 on the outer wall of the filtering cavity 9 is the water inlet, which is designed to efficiently absorb water using the suction force of the impeller 11. The impeller 11 at one end of the long shaft 3 is installed in the water inlet 10. When the motor is driven, the long shaft 3 drives the impeller 11 to rotate and generate suction force and centrifugal force. The filter screen 12 in the filtering cavity 9 intercepts large particles of sand and impurities, preventing them from wearing out the pump body components and prolonging the service life of the equipment. The small holes on the outer wall of the annular flow guide plate 13 guide the movement of water flow impurities together with the sand guide plate 14, improving the filtering efficiency. The sand guide plate 14 surrounds the outer wall of the annular flow guide plate 13 and has a spiral direction opposite to that of the impeller 11. The special structure and the action of the impeller 11 cause the impurities to accumulate and settle, purifying the water flow.

[0036] Working principle: In the actual operation process, after the motor 2 is started, its output end drives the long shaft 3 to rotate at high speed. The long shaft 3 is connected by multiple carbon steel segments through flanges. This connection method ensures the stability and strength of the long shaft during power transmission, and can withstand large torque and tension (suitable for large water turbines and hydroelectric generators, etc.). When the long shaft 3 rotates, the external shock absorbing mechanism begins to play a key role. The shock absorbing blocks 4 are tightly installed on the outer wall of the long shaft 3. When the long shaft 3 appears radial displacement or other unbalanced force due to high-speed rotation, the spring 5 will absorb part of the vibration energy by using its elastic deformation. The connecting rod 6 slides in the buffer groove, and the fixed block 7 limits the extension range of the spring 5 to ensure the stability of the shock absorbing process and effectively reduce the vibration transmission to other parts of the pump body, preventing the connection components from loosening due to long-term vibration and prolonging the overall service life of the equipment. In addition, the shock absorbing blocks 4 and the fixed blocks 7 are semicircular and the combination of multiple shock absorbing blocks 4 and fixed blocks 7 is staggered on both sides of the long shaft 3, which reduces the influence on the water flow direction. The pump shell 8 is connected to the outer wall of the protective cover 1 to form a stable water flow channel,

[0037] When the motor 2 drives the long shaft 3 to rotate, the impeller 11 at one end of the long shaft 3 rotates at high speed in the water suction port 10, and strong suction force is generated to make water enter the filter cavity 9 from the water suction port 10. In this process, the impurities such as silt in the water are first intercepted by the filter screen 12, the filter screen 12 can filter out larger impurities to prevent them from entering the pump body to wear the impeller 11 and other precision components, and the annular flow guide plate 13 and the sand guide plate 14 further process fine impurities. Since the centrifugal force generated by the impeller 11 will throw the impurities in the liquid to the edge of the filter cavity 9, the small holes on the outer wall of the annular flow guide plate 13 on the inner wall can make part of the water flow pass through. Because the spiral direction of the sand guide plate 14 is opposite to the rotation direction of the impeller 11, when the water flow carrying impurities flows through, the impurities are affected by the centrifugal force and water flow turbulence under the blocking and flow guiding effect of the sand guide plate 14, and are gathered to the edge of the filter cavity 9 and are settled under the action of gravity, thereby reducing the erosion of impurities in the water to the sealing material, reducing the aging speed of the sealing material, and maintaining good sealing performance of the equipment; the pump shell 8 is connected to the outer wall of the protective cover 1 to form a stable water flow channel, the water flow moves upward along the pump shell 8, and then is discharged through the water drain valve 15 on the outer wall of the pump shell 8; the water blocking plate 16 on the outer wall of the long shaft 3 is fixedly connected with the pump shell 8 and is installed above the water drain valve 15 to avoid water flow entering the motor 2 to damage electrical elements.

[0038] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified to the technical solutions recorded in the foregoing embodiments, or equivalent replacement of some technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A long shaft segmented connection structure of a large shaft submersible pump, comprising a protective cover (1), characterized in that: The inside of the protective cover (1) is provided with a motor (2), the output end of the motor (2) is provided with a long shaft (3), the outside of the long shaft (3) is provided with a damping mechanism for relieving vibration generated during high-speed rotation, and the outside of the long shaft (3) is provided with a filtering mechanism for filtering silt impurities in water. The long shaft (3) is composed of a plurality of carbon steel segments connected by flanges. The damping mechanism includes a damping block (4) mounted on the outer wall of the long shaft (3), a buffer groove is formed in the inner wall of the damping block (4), one end of a spring (5) is fixedly connected to the inner wall of the buffer groove, one end of a connecting rod (6) is slidably connected to the inner wall of the buffer groove, and the other end of the spring (5) is fixedly connected to a fixed block (7), and the other end of the connecting rod (6) is fixedly connected to the outer wall of the fixed block (7).

2. The long shaft segmented connection structure of a large shaft submersible pump according to claim 1, characterized in that: The filtering mechanism includes a pump housing (8) connected to the outer wall of the protective cover (1), a filtering cavity (9) is connected to the outer wall of the pump housing (8), a water suction port (10) is connected to the outer wall of the filtering cavity (9), an impeller (11) is fixedly connected to one end of the long shaft (3), the impeller (11) is installed in the water suction port (10), a filter screen (12) is fixedly connected to the inside of the filtering cavity (9), and an annular flow guide plate (13) is fixedly connected to the inside of the filtering cavity (9).

3. The long shaft segmented connection structure of a large shaft submersible pump according to claim 2, characterized in that: A plurality of sand guide plates (14) are arranged around the outer wall of the annular flow guide plate (13), and the spiral direction of the sand guide plates (14) is opposite to the rotation direction of the impeller (11).

4. The long shaft segmented connection structure of a large shaft submersible pump according to claim 2, characterized in that: A water drain valve (15) is installed on the outer wall of the pump housing (8), and a fixed block (7) is fixedly connected to the inner wall of the pump housing (8).

5. The long shaft segmented connection structure of a large shaft submersible pump according to claim 4, characterized in that: The pump housing (8) is arranged around the outer wall of the long shaft (3), and the pump housing (8) is composed of a plurality of cast iron segments connected by flanges.

6. The long shaft segmented connection structure of a large shaft submersible pump according to claim 2, characterized in that: A water blocking plate (16) is installed on the outer wall of the long shaft (3), and the pump housing (8) is fixedly connected to the outer wall of the water blocking plate (16).

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