Centrifugal pump with flow stabilizing mechanism

Abstract

The invention is suitable for the technical field of centrifugal pumps, and provides a centrifugal pump with a flow stabilizing mechanism, the centrifugal pump comprises a driving motor, the centrifugal pump and the flow stabilizing mechanism, the flow stabilizing mechanism comprises a sleeve body and a cover plate, the outer wall of the sleeve body and the outer wall of the cover plate are fixedly connected with flange plates respectively, and the two flange plates are in bolt connection; a flow stabilizing sleeve is placed on the inner wall of the sleeve body, flow baffles are fixedly connected to the inner wall of the flow stabilizing sleeve, incoming flow flows along a conical molded line through the flow guide cone, the incoming flow is diffused, accordingly, vortexes are reduced, water flow can be stabilized through the flow baffles through the multiple first flow baffles and the multiple second flow baffles, and after equipment works for a long time, the flow stabilizing effect is good, and the service life of the equipment is prolonged. When the flow baffle is damaged or scale appears on the surface, the sleeve body and the cover plate can be separated by removing the bolt, so that the flow stabilizing sleeve can be conveniently cleaned or replaced by personnel, and when the flow baffle is damaged, only the flow stabilizing sleeve needs to be replaced, so that the later maintenance cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifugal pumps, and in particular relates to a centrifugal pump with a flow stabilizing mechanism. Background Art

[0002] High-speed centrifugal pumps have the characteristics of excellent performance, high reliability and long service life. They can often replace multi-stage centrifugal pumps, reciprocating pumps, etc. in the field of small flow and high head, and are widely used in petrochemical, aerospace and other fields.

[0003] When a high-speed centrifugal pump is running, the centrifugal force generated by the high-speed rotating centrifugal impeller causes the impeller inlet pressure to decrease. The resulting pressure difference will cause part of the water to flow back, and the backflowing water will drive the mainstream to rotate to form a backflow vortex. High-speed centrifugal pumps usually arrange an inducer at the impeller inlet flow channel to improve the impeller's anti-cavitation performance, which will make the impeller flow channel longer and make it easier to form a backflow vortex at the inducer inlet. Under low-flow and high-lift conditions, the inlet attack angle of the inducer blade increases, making it difficult for the water to directly enter the inducer. Part of the water will collide with the inlet working surface of the inducer, causing part of the water to flow back and generate a vortex.

[0004] The generation of the backflow vortex phenomenon will directly lead to a decrease in the efficiency of the centrifugal pump, worsen the suction conditions of the inducer, reduce the anti-cavitation performance of the high-speed pump, and generate pressure pulsation, thereby inducing vibration and noise. In addition, when the high-speed rotating centrifugal impeller drives the liquid flow into the volute, it will cause a certain impact on the volute wall, forming vortices of varying sizes on each section of the volute. At this time, the water flow will fluctuate in the diffuser section of the volute outlet, resulting in a decrease in the working efficiency of the water pump, and will also induce vibration, causing fatigue damage to the high-speed centrifugal pump.

[0005] A Chinese patent with the authorization publication number CN115289073A discloses a flow stabilizing device for a centrifugal pump and a centrifugal pump. Water flows into the water inlet of the flow stabilizing device and are diverted, wherein a portion of the liquid enters the outer edge of the inducer blade at the water inlet of the inducer through a first channel. Since the water flow is diverted, the pressure and speed of the diverted water flow through the first channel are greater than the speed and pressure of the mainstream, and the diversion disperses the return vortex located at the outer edge of the inducer blade; since the return vortex is dispersed, the operating efficiency and anti-cavitation performance of the centrifugal pump are improved, and the pressure pulsation is reduced while reducing the vibration and noise of the centrifugal pump.

[0006] Although this invention patent avoids fatigue damage to the centrifugal pump caused by water flow impact, its structure is complex in the actual production process and is one-piece molded. When the internal blades are damaged, the entire piece needs to be replaced, resulting in high maintenance costs in actual use. Summary of the invention

[0007] The present invention provides a centrifugal pump with a flow stabilizing mechanism, aiming to solve the problem in the prior art that the equipment has a complex structure and is integrally formed, and when internal blades are damaged, the entire piece needs to be replaced, resulting in high maintenance costs in actual use.

[0008] The present invention is implemented as follows: a centrifugal pump with a flow stabilizing mechanism includes a driving motor, a centrifugal pump and a flow stabilizing mechanism, the flow stabilizing mechanism includes a sleeve and a cover plate, the outer walls of the sleeve and the cover plate are respectively fixedly connected with flanges, the two flanges are bolted, a flow stabilizing sleeve is placed on the inner wall of the sleeve, and the inner wall of the flow stabilizing sleeve is fixedly connected with a baffle, the baffle includes a first baffle and a second baffle, the first baffle and the second baffle are staggered, and the outer wall of the baffle is fixedly connected with a connecting column, and the outer wall of the connecting column is fixedly connected with a guide cone.

[0009] Preferably, the connecting column comprises an inner sleeve, and the outer wall of the inner sleeve is slidably connected to an outer sleeve, and a spring is arranged between the inner sleeve and the outer sleeve.

[0010] Preferably, a sealing rubber sleeve is provided on the outside of the outer casing, and the sealing rubber sleeve is located between the baffle plate and the guide cone.

[0011] Preferably, the outer wall of the flow stabilizing sleeve is provided with an external thread, and the inner wall of the sleeve body is provided with an internal thread matching the external thread.

[0012] Preferably, the outer wall of the baffle is provided with friction patterns.

[0013] Preferably, the flow stabilizing sleeve is made of stainless steel.

[0014] Preferably, a sealing rubber pad is provided on the outer wall of the flange.

[0015] Preferably, the outer wall of the flow stabilizing mechanism is coated with a self-cleaning coating.

[0016] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0017] Through the guide cone, the incoming flow is made to flow along the cone profile, and the incoming flow is diffused, thereby reducing eddy currents. Through multiple first baffles and second baffles, the baffles can stabilize the water flow. After the equipment has been working for a long time, the baffles will be damaged or scale will appear on the surface. By loosening the bolts, the sleeve and the cover plate can be separated, which is convenient for personnel to clean or replace the flow stabilizing sleeve. When the baffle is damaged, only the flow stabilizing sleeve needs to be replaced, reducing the cost of subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the flow stabilizing mechanism of the present invention;

[0021] Figure 4 It is a schematic diagram of a three-dimensional enlarged structure of the flow-stabilizing sleeve of the present invention;

[0022] Figure 5 It is a schematic diagram of a three-dimensional enlarged structure of a baffle of the present invention;

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting column of the present invention;

[0024] In the figure: 1. driving motor; 2. centrifugal pump; 3. flow stabilizing mechanism; 301. sleeve; 302. cover plate; 303. flange; 4. flow stabilizing sleeve; 401. baffle plate; 4011. first baffle plate; 4012. second baffle plate; 402. external thread; 403. friction pattern; 5. connecting column; 501. inner sleeve; 502. outer sleeve; 503. spring; 504. sealing rubber sleeve; 6. guide cone. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] The embodiment of the present invention provides a centrifugal pump with a flow stabilizing mechanism, such as Figure 1-6As shown, it includes a driving motor 1, a centrifugal pump 2 and a flow stabilizing mechanism 3, the flow stabilizing mechanism 3 includes a sleeve 301 and a cover plate 302, the outer walls of the sleeve 301 and the cover plate 302 are respectively fixedly connected with flanges 303, the two flanges 303 are bolted, a flow stabilizing sleeve 4 is placed on the inner wall of the sleeve 301, and the inner wall of the flow stabilizing sleeve 4 is fixedly connected with a baffle 401, the baffle 401 includes a first baffle 4011 and a second baffle 4012, the first baffle 4011 and the second baffle 4012 are staggered, and the outer wall of the baffle 401 is fixedly connected with a connecting column 5, and the outer wall of the connecting column 5 is fixedly connected with a guide cone 6.

[0028] It should be noted that, since the equipment in the prior art has a complex structure and is integrally formed, when the internal blades are damaged, the entire piece needs to be replaced, resulting in high maintenance costs during actual use. Therefore, in order to solve the problem that the equipment in the prior art has a complex structure and is integrally formed, when the internal blades are damaged, the entire piece needs to be replaced, resulting in high maintenance costs during actual use, this solution uses a guide cone 6 to make the incoming flow flow along the cone profile, diffuse the incoming flow, and thus reduce eddy currents. Through multiple first baffles 4011 and second baffles 4012, the baffle 401 can stabilize the water flow. After the equipment has been working for a long time, the baffle 401 will be damaged or scale will appear on the surface. By loosening the bolts, the sleeve 301 and the cover plate 302 can be separated, which facilitates personnel to clean or replace the flow stabilizing sleeve 4. When the baffle 401 is damaged, only the flow stabilizing sleeve 4 needs to be replaced, reducing the cost of subsequent maintenance.

[0029] In a further preferred embodiment of the present invention, Figure 1-6 As shown, the connecting column 5 includes an inner sleeve 501 , and an outer sleeve 502 is slidably connected to the outer wall of the inner sleeve 501 , and a spring 503 is provided between the inner sleeve 501 and the outer sleeve 502 .

[0030] In this embodiment, the spring 503 can be used to allow the guide cone 6 to have an elastic activity space, thereby providing a certain buffer for the pressure of the incoming flow. When the pressure in the incoming flow drops suddenly, the pressure of the flow stabilizing mechanism 3 is greater than the external pressure. The elastic force of the spring 503 is restored, so that the guide cone 6 can block the water inlet pipe, preventing the water pressure in the flow stabilizing mechanism 3 from dropping suddenly, and avoiding sudden changes in pressure in the flow stabilizing mechanism 3 and the centrifugal pump 2.

[0031] In a further preferred embodiment of the present invention, Figure 6 As shown, a sealing rubber sleeve 504 is provided on the outside of the outer sleeve 502 , and the sealing rubber sleeve 504 is located between the baffle plate 401 and the guide cone 6 .

[0032] In this embodiment, the sealing rubber sleeve 504 provides sealing conditions for the inner sleeve 501 and the outer sleeve 502, thereby preventing water from entering between the inner sleeve 501 and the outer sleeve 502, and ensuring that the inner sleeve 501 and the outer sleeve 502 work normally for a long time.

[0033] In a further preferred embodiment of the present invention, Figure 4 As shown, the outer wall of the flow stabilizing sleeve 4 is provided with an external thread 402 , and the inner wall of the sleeve body 301 is provided with an internal thread matching the external thread 402 .

[0034] In this embodiment, the flow stabilizing sleeve 4 and the sleeve body 301 are threadedly connected, which ensures the stability of the installation of the flow stabilizing sleeve 4 and prevents the flow stabilizing sleeve 4 from shaking in the flow stabilizing mechanism 3 .

[0035] In a further preferred embodiment of the present invention, Figure 4 As shown, the outer wall of the baffle plate 401 is provided with friction patterns 403 .

[0036] In this embodiment, the frictional force of the outer wall of the flow stabilizing sleeve 4 is increased by the friction pattern 403 , thereby preventing a person from slipping when rotating the flow stabilizing sleeve 4 .

[0037] In a further preferred embodiment of the present invention, Figure 4 As shown, the flow sleeve 4 is made of stainless steel.

[0038] In this embodiment, the flow stabilizing sleeve 4 made of stainless steel has good weather resistance, thereby increasing the service life of the flow stabilizing sleeve 4 .

[0039] In a further preferred embodiment of the present invention, Figure 3 As shown, the outer wall of the flange 303 is provided with a sealing rubber pad.

[0040] In this embodiment, the sealing rubber pad is used to improve the sealing performance between the sleeve body 301 and the cover plate 302, thereby preventing leakage between the sleeve body 301 and the cover plate 302.

[0041] In a further preferred embodiment of the present invention, Figure 1 As shown, the outer wall of the flow stabilizing mechanism 3 is coated with a self-cleaning coating.

[0042] In this embodiment, the self-cleaning coating is a silicon dioxide nano-coating that imitates the "lotus effect". Through the micro-nano-scale rough surface structure and the characteristics of a water contact angle greater than 150°, water droplets are formed into spheres and roll down, taking away surface dirt, thereby ensuring that the flow stabilizing mechanism 3 is clean when working outdoors.

[0043] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0044] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0045] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A centrifugal pump with a flow stabilizing mechanism, characterized in that: The invention comprises a driving motor (1), a centrifugal pump (2) and a flow stabilizing mechanism (3), wherein the flow stabilizing mechanism (3) comprises a casing (301) and a cover plate (302), the outer walls of the casing (301) and the cover plate (302) are respectively fixedly connected with flanges (303), the two flanges (303) are bolted together, a flow stabilizing sleeve (4) is placed on the inner wall of the casing (301), and a baffle (401) is fixedly connected to the inner wall of the flow stabilizing sleeve (4), the baffle (401) comprises a first baffle (4011) and a second baffle (4012), the first baffle (4011) and the second baffle (4012) are staggered, the outer wall of the baffle (401) is fixedly connected with a connecting column (5), and the outer wall of the connecting column (5) is fixedly connected with a guide cone (6).

2. A centrifugal pump with a flow stabilizing mechanism as claimed in claim 1, characterized in that: The connecting column (5) comprises an inner sleeve (501), and the outer wall of the inner sleeve (501) is slidably connected to an outer sleeve (502), and a spring (503) is arranged between the inner sleeve (501) and the outer sleeve (502).

3. A centrifugal pump with a flow stabilizing mechanism as claimed in claim 2, characterized in that: A sealing rubber sleeve (504) is provided on the outside of the outer sleeve (502), and the sealing rubber sleeve (504) is located between the baffle plate (401) and the guide cone (6).

4. A centrifugal pump with a flow stabilizing mechanism as claimed in claim 1, characterized in that: The outer wall of the flow stabilizing sleeve (4) is provided with an external thread (402), and the inner wall of the sleeve body (301) is provided with an internal thread matching the external thread (402).

5. A centrifugal pump with a flow stabilizing mechanism as claimed in claim 4, characterized in that: The outer wall of the baffle plate (401) is provided with friction patterns (403).

6. A centrifugal pump with a flow stabilizing mechanism as claimed in claim 1, characterized in that: The flow stabilizing sleeve (4) is made of stainless steel.

7. A centrifugal pump with a flow stabilizing mechanism as claimed in claim 1, characterized in that: The outer wall of the flange (303) is provided with a sealing rubber pad.

8. A centrifugal pump with a flow stabilizing mechanism as claimed in claim 1, characterized in that: The outer wall of the flow stabilizing mechanism (3) is coated with a self-cleaning coating.

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