Submersible pump provided with a damping assembly

Abstract

The utility model discloses a submersible pump with damping assembly, including pump body and the impeller shaft and motor of setting in the pump body, the impeller shaft and motor are fixedly connected through damping assembly between, damping assembly includes end cover, shell, damper body and inertia body, end cover is located the front side fixed connection of shell, the damper body is located the coaxial fixed connection in end cover and shell, inertia body swing joint is formed in the annular sealed cavity between shell and damper body. The submersible pump with damping assembly, through damper body, shell and end cover are connected into a whole, relative torsion with inertia body when rotating, make the spring leaf group deformation between radial groove no.

Description

Technical Field

[0001] This utility model relates to the field of submersible pump technology, specifically a submersible pump equipped with vibration damping components. Background Technology

[0002] A submersible pump is a water lifting device that integrates a motor and a water pump and operates completely underwater. It is mainly used for deep well water extraction, farmland irrigation, industrial cooling, mine rescue and other fields. It drives the impeller to rotate through the motor, and lifts and transports the liquid energy to the ground under the action of centrifugal force. Its core feature is that it operates as a whole submersible, with the motor and pump body sealed and integrated, and can be directly submerged in water.

[0003] Currently, the impeller shaft and motor of submersible pumps are connected by a coupling. When the submersible pump is operating at high speed, the motor rotates at high speed, which drives the pump impeller assembly to rotate at high speed. However, the impeller shaft of a multi-stage pump is relatively long and cannot be dynamically balanced. As a result, the vibration at the pump impeller shaft end is transmitted to the motor end, which may affect the normal operation of the motor. Utility Model Content

[0004] The purpose of this invention is to provide a submersible pump equipped with vibration damping components to solve the problem mentioned in the background art that the vibration of the pump impeller shaft end is transmitted to the motor end, which may affect the normal operation of the motor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a submersible pump equipped with a vibration damping component, comprising a pump body and an impeller shaft and a motor disposed within the pump body, wherein the impeller shaft and the motor are fixedly connected by the vibration damping component; the vibration damping component includes an end cover, a housing, a vibration damper body, and an inertial body, wherein the end cover is fixedly connected to the front side of the housing, and the end cover and the housing form a sealable cavity, the vibration damper body is located within the cavity formed by the end cover and the housing, and the axis of the vibration damper body is coaxial with the axis of the end cover and the housing, and the inertial body is movably engaged with the housing and the... Within the annular sealed cavity formed between the vibration damper bodies, the vibration damper bodies have mating holes. The impeller shaft and the motor output shaft are respectively connected to the mating holes from the front and rear. Multiple radial grooves are equidistantly spaced on the outer side of the vibration damper bodies. Radial grooves corresponding to the multiple radial grooves are formed on the side of the inertial body near the vibration damper bodies. Spring plate groups are movably engaged between the radial grooves and the radial grooves. Anti-friction rings are fixedly installed on the front and rear sides of the inertial body near the outer wall of the vibration damper bodies. The anti-friction rings are located between adjacent spring plate groups.

[0006] Preferably, the spring plate assembly has a stop block that is locked in the radial groove on both the front and rear sides of the end near the shock absorber body, and a cover plate that is fixedly connected to the inertial body on both the front and rear sides of the end away from the shock absorber body.

[0007] Preferably, rollers that fit the left and right sides of the inner wall of the radial groove are respectively provided on the left and right sides of the spring sheet assembly.

[0008] Preferably, an oil injection hole is provided on the front side of the end cap, and silicone oil located between the inertial body and the end cap is injected into the end cap and the outer shell.

[0009] Preferably, the mating hole is provided with a flat key adapted to the impeller shaft and the motor output shaft, and the mating hole is interference-fitted with the impeller shaft and the motor output shaft respectively.

[0010] Preferably, the spring sheet group is composed of multiple spring sheets stacked together.

[0011] Preferably, the pump body has an inlet end and an outlet end at its front and rear ends, respectively. The pump body has an inlet chamber communicating with the inlet end and a sealed mounting chamber in its front and rear parts, respectively. A guide channel communicating with the outlet end is provided between the pump body and the inlet chamber.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: during use, torsional vibration or vibration is transmitted to the damper body through the impeller shaft. Since the damper body, outer shell and end cover are connected as a whole, when rotating, it twists relative to the inertial body, causing the spring plate group between radial groove one and radial groove two to deform. The spring plates displace relative to each other and generate friction, forming frictional damping to suppress the torsional vibration torque. Combined with the viscous damping of the silicone oil between the outer shell and the inertial body, some vibration energy is consumed, reducing the torsional vibration amplitude of the impeller shaft and ensuring the normal operation of the motor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the connection structure between the vibration damping component of this utility model and the impeller shaft and the motor output shaft;

[0016] Figure 4 This is an exploded three-dimensional structural diagram of the vibration damping component of this utility model;

[0017] Figure 5 This is an exploded view of the combined structure of the shock absorber body and the inertial body of this utility model.

[0018] In the diagram: 1. Pump body; 11. Inlet chamber; 12. Mounting chamber; 13. Flow guide channel; 2. Inlet end; 3. Outlet end; 4. Impeller shaft; 5. Motor; 6. Vibration damping assembly; 61. End cover; 62. Outer shell; 63. Vibration damper body; 64. Inertial body; 65. Mating hole; 66. Radial groove one; 67. Radial groove two; 68. Spring plate assembly; 69. Anti-friction ring; 610. Cover plate; 611. Stop block; 612. Roller. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This utility model provides a technical solution: a submersible pump equipped with vibration damping components, including a pump body 1, an impeller shaft 4 and a motor 5 disposed within the pump body 1. The structure and working principle of the multi-stage submersible pump are as follows: During operation, the multi-stage submersible pump mainly relies on the rotation of the motor's rotor shaft to drive the impeller inside the pump casing to rotate at high speed, transferring the medium water from the inlet to the outlet, and then extracting it to the surface through a water pipe connected to the outlet. The technology in this patent application covers a shielded pipeline pump within the multi-stage submersible pump. The shielded motor is installed inside the submersible pump body, and the impeller is directly mounted on the motor's shaft and enclosed by guide vanes. This shortens the length of the multi-stage submersible pump, making its internal structure more compact. The impeller adopts a closed impeller structure with front and rear baffles, which reduces the impeller's wear rate. Because the impeller is enclosed within the guide vane cavity, it has an additional layer of sound insulation compared to traditional submersible pumps, resulting in lower noise during operation. Furthermore, as water flows in from the inlet, the flow channel space decreases, and the water pressure increases from low to high, reaching its maximum at the outlet, thus resulting in higher water pressure during operation. Because the motor is installed inside the pump, the continuous flow of water during operation carries away the heat generated by the motor, resulting in good heat dissipation. Additionally, a guide vane is added to the final stage guide vane to guide the pressurized water, reducing hydraulic loss.

[0021] like Figure 2As shown, the water enters through the inlet 2. Multiple impellers are mounted on the impeller shaft 4, which is driven to rotate by the output shaft of the motor 5. The impeller shaft 4 is equipped with multiple guide vanes, the same number as the number of impellers. The guide vanes are fixedly installed on the submersible pump body. The high-speed rotating impellers throw the water onto the guide vanes and then gather it onto the next stage impeller, increasing the pressure stage by stage. Finally, the water flows out from the outlet hole of the guide shroud into the inlet chamber 11. It is then diverted by the guide plate on the inlet chamber 11, enters the pipeline, and flows out through the outlet 3.

[0022] Several impellers and guide vanes are mounted on the drive shaft (impeller shaft 4) of the submersible pump. The impellers are detachably and fixedly connected to their respective drive shaft (impeller shaft 4), and the guide vanes are fixedly connected to the pump body. When the motor drives the pump body drive shaft (impeller shaft 4) to rotate, the impellers rotate at high speed, throwing the water onto the guide vanes. The water then flows through the guide grooves of the guide vanes and is collected onto the next stage impeller. Multiple impellers and guide vanes can be installed in a single pump unit, forming a multi-stage system. During operation, the impellers rotate with the drive shaft (impeller shaft 4), while the guide vanes remain relatively stationary. This process pressurizes the water stage by stage, generating sufficient water pressure for production operations.

[0023] like Figure 2 and Figure 3 As shown, the impeller shaft 4 and the output shaft of the motor 5 are fixedly connected by a vibration damping assembly 6. The power output from the motor 5 is first transmitted to the vibration damping assembly 6 and then to the impeller shaft 4. The impeller shaft 4 then drives multiple impellers on the shaft to rotate. The vibration damping assembly 6 includes an end cover 61, a housing 62, a damper body 63, and an inertial body 64. The end cover 61 is fixedly connected to the front of the housing 62. The end cover 61 and the housing 62 form a sealable cavity, which is filled with silicone oil during operation. The cavity formed by the end cover 61 and the housing 62 is fixed relative to the pump body 1.

[0024] like Figure 4 As shown, the damper body 63 has a mating hole 65 inside, and uniformly distributed mass blocks on the outside. The damper body 63 is located in the cavity formed by the end cover 61 and the outer shell 62, and the axis of the damper body 63 is coaxial with the axes of the end cover 61 and the outer shell 62. One end of the mating hole 65 is fixed to the impeller shaft 4 by a key, and the other end is fixed to the output shaft of the motor 5 by a key. Multiple radial grooves 66 are equidistantly spaced on the outer mass blocks of the damper body 63.

[0025] like Figure 4As shown, the inertial body 64 is a ring-shaped component. The inner ring end of the inertial body 64 works in conjunction with the outside of the damper body 63, and the outer ring end of the inertial body 64 is movably engaged in the annular sealed cavity formed between the outer shell 62 and the damper body 63. A radial groove 67 corresponding to multiple radial grooves 66 is formed on the side of the inertial body 64 near the damper body 63. A spring plate assembly 68 is movably engaged between the radial grooves 66 and 67, and the spring plate assembly 68 is composed of several spring plates. Anti-friction rings 69 are fixedly installed on the front and rear sides of the inertial body 64 near the outer wall of the damper body 63, and the anti-friction rings 69 are positioned between adjacent spring plate assemblies 68.

[0026] When a multistage submersible pump is in operation, the impeller shaft 4, the drive shaft of the multistage submersible pump, bears a large load. Due to processing and assembly reasons, there will be many dynamic imbalances, which will generate torsional vibration or vibration during operation. These torsional vibrations or vibrations are transmitted to the vibration damper body 63 through the impeller shaft 4. When the vibration damper body 63 rotates, it will generate relative torsion or rotation with the inertial body 64, causing the spring plate assembly 68 between the radial groove 1 66 and the radial groove 2 67 to deform. The spring plates in the spring plate assembly 68 will displace each other and generate friction. Friction will generate frictional damping and frictional heat, which will consume the torsional vibration and vibration of the impeller shaft 4 and suppress the torsional torque. At the same time, the end cover 61 and the outer shell 62 form a sealable cavity. The sealable cavity is filled with silicone oil during operation. The vibration damper body 63 and the inertial body 64 rotate in the highly viscous silicone oil. Its viscous damping can be used to consume part of the energy generated by vibration, reduce the torsional vibration amplitude caused by the impeller shaft 4, and ensure the normal operation of the motor 5.

[0027] During the relative torsional motion of the inertial body 64 with respect to the outer shell 62 and the vibration damper body 63, the friction-reducing ring 69 effectively reduces the friction between the inertial body 64 and the vibration damper body 63. When the submersible pump generates a large torsional vibration at the moment of starting or stopping, the deformation of the spring plate group 68 will increase accordingly. At this time, the viscous damping effect of the silicone oil will also be enhanced, forming a synergistic effect with the friction damping of the spring plate group 68, which quickly absorbs and dissipates vibration energy, thereby significantly reducing the intensity of vibration transmitted to the motor 5.

[0028] Both the front and rear sides of the spring plate assembly 68 near the damper body 63 are provided with stop blocks 611 that are locked in radial grooves 66. Both the front and rear sides of the spring plate assembly 68 away from the damper body 63 are provided with cover plates 610 that are fixedly connected to the outside of the inertial body 64. The stop blocks 611, through their cooperation with the radial grooves 66, can position the initial position of the spring plate assembly 68, preventing it from shifting during the relative torsion of the damper body 63 and the inertial body 64, and ensuring that the spring plate assembly 68 is always on the preset force trajectory. The cover plates 610 are firmly connected to the inertial body 64 by bolts or rivets, and stably fix the end of the spring plate assembly 68 away from the damper body 63, so that both ends of the spring plate assembly 68 can obtain reliable support when deformed, and avoid the reduction of vibration damping effect due to loose connection.

[0029] Rollers 612 are fitted on both the left and right sides of the inner wall of the radial groove 67 to fit the left and right side walls of the spring plate assembly 68. The rollers 612 are heat-treated and their axial direction is consistent with the axial direction of the mating hole 65. The rollers 612 form a lateral limit on the left and right sides of the spring plate assembly 68 to prevent the spring plate assembly 68 from moving laterally under high-frequency vibration, ensuring that the deformation direction of the spring plate assembly 68 is consistent with the preset trajectory, thereby improving the stability and service life of the vibration damping component 6.

[0030] An oil injection hole is provided on the front side of the end cap 61. Silicone oil, located between the inertial body 64 and the end cap 61, is injected into the end cap 61 and the outer shell 62. The silicone oil has high viscosity and can form a viscous damping layer between the inertial body 64 and the end cap 61. The silicone oil generates viscous resistance, further consuming vibration energy. Together with the elastic deformation of the spring plate assembly 68, it forms a composite vibration damping system, effectively improving the damping component 6's ability to attenuate vibrations of different frequencies. The oil injection hole facilitates the replenishment or replacement of silicone oil inside the end cap 61 and the outer shell 62 during assembly or maintenance, ensuring that the amount of silicone oil always meets the vibration damping requirements. At the same time, a sealing plug or sealing bolt can be installed at the oil injection hole to prevent silicone oil leakage and maintain the long-term stable operation of the vibration damping system.

[0031] A flat key is provided in the mating hole 65 to match the output shafts of the impeller shaft 4 and the motor 5. The mating hole 65 is interference-fitted with the output shafts of the impeller shaft 4 and the motor 5 respectively. The flat key can transmit the torque between the output shafts of the impeller shaft 4 and the motor 5, ensuring the stability and efficiency of power transmission. The interference fit further enhances the tightness of the connection between the mating hole 65 and the two shafts, effectively preventing the increase of vibration or power loss caused by loose connection.

[0032] The spring plate group 68 uses multiple spring plates stacked together. When the spring plate group 68 deforms, the spring plates move relative to each other and generate friction. The friction generates frictional damping, which suppresses torsional vibration torque. It can transfer vibration energy through the contact surface between the spring plates and convert it into heat energy for gradual dissipation.

[0033] The pump body 1 has an inlet end 2 and an outlet end 3 at its front and rear ends, respectively. The pump body 1 has an inlet chamber 11 connected to the inlet end 2 and a sealed mounting chamber 12 in its front and rear parts, respectively. A guide channel 13 connected to the outlet end 3 is provided between the pump body 1 and the inlet chamber 11. The impeller shaft 4 is located in the inlet chamber 11. A multi-stage impeller is provided outside the impeller shaft 4 for pumping water. The mounting chamber 12 is completely isolated from the inlet chamber 11 by a sealing partition. A corrosion-resistant mechanical seal is installed on the partition, which can effectively prevent water from entering the mounting chamber 12 and damaging the motor 5. The cross-section of the guide channel 13 gradually narrows from the inlet chamber 11 side to the outlet end 3 side, forming a tapered flow channel structure, which helps to increase the water flow velocity and reduce flow resistance loss.

[0034] Working principle: When the submersible pump is running, the motor 5 transmits power to the vibration damping component 6 and then to the impeller shaft 4. Through the combined action of multiple impellers and guide vanes on the impeller shaft 4, the water enters from the inlet end 2. The multi-stage impellers set outside the impeller shaft 4 rotate with the impeller shaft 4, throwing the water onto the guide vanes connected to the pump body 1 and then gathering it onto the next stage impeller. The water is pressurized stage by stage and finally flows out from the outlet hole connected to the guide channel 13 at the rear end of the inlet chamber 11, enters the guide channel 13 and flows out from the outlet end 3. The impeller shaft 4 of the multistage submersible pump has a large load. Due to processing and assembly reasons, there will be a lot of dynamic imbalance. During operation, torsional vibration or vibration will be generated. These torsional vibrations or vibrations are transmitted to the damper body 63 through the impeller shaft 4. When the damper body 63 rotates, it will generate relative torsion or rotation with the inertial body 64, causing the spring plate group 68 between the radial groove 1 66 and the radial groove 2 67 to deform. The spring plates in the spring plate group 68 will displace each other and generate friction. Friction will generate frictional damping and frictional heat, which will consume the torsional vibration and vibration of the impeller shaft 4 and suppress the torsional torque. Meanwhile, the end cap 61 and the outer shell 62 form a sealable cavity. When the sealable cavity is working, it is filled with silicone oil. The damper body 63 and the inertial body 64 rotate in the highly viscous silicone oil. Its viscous damping can be used to consume part of the energy generated by the vibration, reduce the torsional vibration amplitude caused by the impeller shaft 4, and turn the vibration effect into heat, which is dissipated from the surface of the outer shell 62, thereby reducing the torsional vibration amplitude caused by the impeller shaft 4, thus ensuring the normal operation of the motor 5. The above is the working process of the entire device. All contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A submersible pump equipped with vibration damping components, comprising a pump body (1), an impeller shaft (4) and a motor (5) disposed within the pump body (1), and a plurality of impellers and guide vanes, characterized in that: The impeller shaft (4) and the motor (5) are fixedly connected by a vibration damping assembly (6); The vibration damping assembly (6) includes an end cap (61), a housing (62), a damper body (63), and an inertial body (64). The end cap (61) is fixedly connected to the front of the housing (62), and the end cap (61) and the housing (62) form a sealable cavity. The damper body (63) is located within the cavity formed by the end cap (61) and the housing (62), and the axis of the damper body (63) is coaxial with the axes of the end cap (61) and the housing (62). The inertial body (64) is movably engaged within the annular sealed cavity formed between the housing (62) and the damper body (63). The damper body (63) has a mating hole (65) inside. The impeller shaft (4) and the output shaft of the motor (5) are respectively connected to the mating hole (65) from the front and rear. The outer side of the damper body (63) is provided with a plurality of radial grooves (66) at equal intervals. The inertial body (64) is provided with a radial groove (67) corresponding to the plurality of radial grooves (66) on the side near the damper body (63). A spring plate group (68) is movably engaged between the radial grooves (66) and the radial grooves (67). The front and rear sides of the inertial body (64) are fixedly installed with anti-friction rings (69) near the outer wall of the damper body (63). The anti-friction rings (69) are located between adjacent spring plate groups (68).

2. A submersible pump equipped with a vibration damping component according to claim 1, characterized in that: The spring plate assembly (68) has a stop block (611) on both the front and rear sides near the end of the damper body (63) that is locked in the radial groove (66), and a cover plate (610) fixedly connected to the outside of the inertial body (64) on both the front and rear sides away from the end of the damper body (63).

3. A submersible pump equipped with a vibration damping component according to claim 2, characterized in that: Rollers (612) that fit the left and right sides of the inner wall of the radial groove (67) are respectively engaged with the left and right sides of the spring sheet assembly (68).

4. A submersible pump equipped with a vibration damping component according to claim 1, characterized in that: An oil injection hole is provided on the front side of the end cap (61), and silicone oil located between the inertial body (64) and the end cap (61) is injected into the end cap (61) and the outer shell (62).

5. A submersible pump equipped with a vibration damping component according to claim 1, characterized in that: The mating hole (65) is provided with a flat key that is compatible with the output shaft of the impeller shaft (4) and the motor (5). The mating hole (65) is interference-fitted with the output shaft of the impeller shaft (4) and the motor (5) respectively.

6. A submersible pump equipped with a vibration damping component according to claim 1, characterized in that: The spring sheet group (68) is composed of multiple spring sheets stacked together.

7. A submersible pump equipped with a vibration damping component according to claim 1, characterized in that: The pump body (1) has an inlet end (2) and an outlet end (3) at its front and rear ends, respectively. The pump body (1) has an inlet chamber (11) communicating with the inlet end (2) and a sealed mounting chamber (12) in its front and rear parts, respectively. A guide channel (13) communicating with the outlet end (3) is provided between the pump body (1) and the inlet chamber (11).

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