Anti-cavitation centrifugal pump with inducer

Abstract

The anti-cavitation centrifugal pump with the inducer comprises a centrifugal pump main shaft, an impeller is installed at the bottom end of the centrifugal pump main shaft, an anti-cavitation mechanism is arranged above the impeller, the anti-cavitation mechanism comprises an installation cylinder arranged on the centrifugal pump main shaft in a sleeved mode, the installation cylinder is detachably connected with the centrifugal pump main shaft, and the inducer is arranged on the installation cylinder. A spiral inducer is mounted on the mounting cylinder, and a speed reduction assembly is arranged on the inducer. According to the anti-cavitation device, the mounting barrel, the limiting plate, the supporting plate, the limiting rod, the nut and the inducer are arranged, the mounting barrel provided with the inducer can be taken down by disassembling the nut, the inducer which is seriously abraded can be replaced, and therefore the good anti-cavitation effect is kept; and on the other hand, impact force applied to the blades by water flow enables the sleeve to rotate on the limiting rod, severe local abrasion of the blades is prevented, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to an anti-cavitation centrifugal pump with an inducer. Background Art

[0002] When cavitation occurs in a centrifugal pump, the shock wave transmitted to the impeller and pump casing is harmful, and the trace amount of oxygen dissolved in the liquid chemically corrodes the metal. After a certain period of time, scars and cracks may appear on the surface of the pump, or even gradually fall off in a sponge-like manner, reducing the service life of the centrifugal pump. The existing patent (Announcement No.: CN219932562U) discloses an anti-cavitation centrifugal pump equipped with an inducer. The utility model sets an inducer and a protrusion. The protrusion can slow down the liquid flow rate, induce a relatively high pressure near the inlet of the inducer, slow down the diffusion of the low-pressure area, and thus inhibit cavitation. As the main structure of the centrifugal pump for anti-cavitation, the inducer will definitely produce a high degree of wear after long-term use. This wear will have a great negative impact on the anti-cavitation ability of the centrifugal pump and is not conducive to long-term use. To this end, we propose an anti-cavitation centrifugal pump with an inducer. Utility Model Content

[0003] In order to solve the above problems, the utility model provides an anti-cavitation centrifugal pump with an inducer.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An anti-cavitation centrifugal pump with an inducer is designed, comprising a centrifugal pump main shaft, an impeller is installed at the bottom end of the centrifugal pump main shaft, an anti-cavitation mechanism is arranged above the impeller, the anti-cavitation mechanism comprises a mounting cylinder sleeved on the centrifugal pump main shaft, the mounting cylinder is detachably connected to the centrifugal pump main shaft, a spiral inducer is installed on the mounting cylinder, and a reduction assembly is arranged on the inducer.

[0006] In the above scheme, a support plate fixed to the centrifugal pump main shaft is provided at the bottom end of the mounting cylinder, a limit rod is vertically and detachably connected to the support plate, a limit plate is sleeved on the top end of the centrifugal pump main shaft, and the top end of the limit rod is locked with the limit plate by a nut.

[0007] In the above solution, a threaded seat which is threadedly connected to the bottom end of the limiting rod is fixed on the support plate.

[0008] In the above scheme, the reduction assembly includes a sleeve arranged between adjacent blades of the inducer, and the blades are evenly arranged on the sleeve.

[0009] In the above solution, the sleeve is movably mounted on the limiting rod, and the blades are spiral-shaped.

[0010] In the above scheme, the inducer blade is provided with an insertion hole for passing the sleeve and the blade.

[0011] In the above solution, a mounting plate is coaxially fixed to the bottom end of the main shaft of the centrifugal pump, and the impeller is fixed on the mounting plate.

[0012] The advantages and beneficial effects of the utility model are as follows: by arranging the installation cylinder, the limit plate, the support plate, the limit rod, the nut and the inducer, the installation of the inducer and the main shaft of the centrifugal pump can be completed by simply sleeve the installation cylinder on the main shaft of the centrifugal pump, and at the same time cooperate with the support plate to support the installation cylinder, and then combine with the limit plate, the cover is placed on the top of the installation cylinder, and at the same time use the limit rod to lock the installation cylinder and the limit plate through the nut, so that the installation cylinder is tightly clamped between the limit plate and the support plate, so as to achieve the effect of fixing the installation cylinder and the main shaft of the centrifugal pump. Compared with the prior art, the nut can be removed by , separate the limit plate from the limit rod, then remove the limit plate, and then remove the mounting tube with the inducer installed, so as to replace the severely worn inducer, thereby maintaining a good anti-cavitation effect. By setting a deceleration component, a sleeve with blades on the outer wall is movably mounted on the limit rod. When the water flow hits the blade, on the one hand, the water flow speed will be slowed down. On the other hand, the impact force applied by the water flow to the blade will cause the sleeve to rotate on the limit rod, so that blades at different positions are in contact with the water flow, so that the degree of wear of the blades tends to be uniform, thereby preventing serious local wear of the blades and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 This is a schematic diagram of the structure of an anti-cavitation centrifugal pump with an inducer proposed by the utility model;

[0015] Figure 2 The utility model is a schematic structural diagram of a speed reduction assembly of an anti-cavitation centrifugal pump with an inducer.

[0016] In the figure: centrifugal pump main shaft 1, assembly plate 2, impeller 3, support plate 4, mounting cylinder 5, limit plate 6, inducer 7, limit rod 8, nut 9, reduction assembly 10, sleeve 101, blade 102, threaded seat 11, socket 12. DETAILED DESCRIPTION

[0017] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] See also Figure 1-2 , the utility model provides a technical solution: an anti-cavitation centrifugal pump with an inducer, comprising a centrifugal pump main shaft 1, an impeller 3 is installed at the bottom end of the centrifugal pump main shaft 1;

[0019] Furthermore, a mounting plate 2 is coaxially fixed to the bottom end of the centrifugal pump main shaft 1, and the impeller 3 is fixed on the mounting plate 2; the mounting plate 2 is used to provide support for the impeller 3, thereby improving the connection stability between the impeller 3 and the centrifugal pump main shaft 1;

[0020] An anti-cavitation mechanism is provided above the impeller 3, and the anti-cavitation mechanism includes a mounting cylinder 5 sleeved on the centrifugal pump main shaft 1, the mounting cylinder 5 is detachably connected to the centrifugal pump main shaft 1, and a spiral inducer 7 is installed on the mounting cylinder 5;

[0021] Further, a support plate 4 coaxially fixed with the centrifugal pump main shaft 1 is provided at the bottom end of the installation cylinder 5, a limit rod 8 is vertically and detachably connected to the support plate 4, a limit plate 6 is sleeved on the top end of the centrifugal pump main shaft 1, and the limit plate 6 cover is placed on the top surface of the installation cylinder 5, the top end of the limit rod 8 passes through the limit plate 6, and the top end of the limit rod 8 is locked with the limit plate 6 by a nut 9;

[0022] Furthermore, a threaded seat 11 is fixed on the support plate 4 and is threadedly connected to the bottom end of the limiting rod 8; by rotating the limiting rod 8, the limiting rod 8 can be separated from the threaded seat 11 to assist in removing the installation tube 5;

[0023] Furthermore, the blades of the inducer 7 are provided with a plug hole 12 for passing the sleeve 101 and the blades 102, so that the limit rod 8 is connected to the threaded seat 11 located on the support plate 4;

[0024] Specifically, by setting the installation cylinder 5, the limiting plate 6, the supporting plate 4, the limiting rod 8, the nut 9 and the inducer 7, the installation of the inducer 7 and the centrifugal pump main shaft 1 can be completed by simply putting the installation cylinder 5 on the centrifugal pump main shaft 1, and at the same time cooperate with the supporting plate 4 to support the installation cylinder 5, and then combine with the limiting plate 6, the cover is placed on the top of the installation cylinder 5, and at the same time use the limiting rod 8 to lock the installation cylinder 5 and the limiting plate 6 through the nut 9, so that the installation cylinder 5 is tightly clamped between the limiting plate 6 and the supporting plate 4, so as to achieve the effect of fixing the installation cylinder 5 and the centrifugal pump main shaft 1. Compared with the prior art, the limiting plate 6 can be separated from the limiting rod 8 by removing the nut 9, and then the limiting plate 6 can be removed, and then the installation cylinder 5 with the inducer 7 installed can be removed, so that the severely worn inducer 7 can be replaced, thereby maintaining a good anti-cavitation effect.

[0025] The inducer 7 is provided with a speed reduction assembly 10;

[0026] Further, the speed reduction assembly 10 includes a sleeve 101 disposed between adjacent blades of the inducer 7, and blades 102 are evenly disposed on the sleeve 101;

[0027] Specifically, sleeve 101 is used as a carrier of blade 102, and blade 102 is used as an obstruction structure to slow down the flow velocity of water flowing along the blades of inducer 7, thereby assisting the operation of inducer 7, further slowing down the flow velocity of water, and improving the anti-cavitation capability.

[0028] Furthermore, the sleeve 101 is movably mounted on the limiting rod 8, and the blade 102 is spiral-shaped; the spiral blade 102 increases the contact area between the blade 102 and the water flow, thereby effectively slowing down the flow rate of the water flow;

[0029] Specifically, by setting up the deceleration component 10, and by movably sleeve-mounting the sleeve 101 with blades 102 on the outer wall on the limiting rod 8, when the water flow hits the blades 102, on the one hand, the water flow speed will be slowed down, and on the other hand, the impact force applied by the water flow to the blades 102 will cause the sleeve 101 to rotate on the limiting rod 8, so that the blades 8 at different positions are in contact with the water flow, so that the degree of wear of the blades 8 tends to be uniform, thereby preventing the blades 8 from being severely worn locally and extending the service life.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-cavitation centrifugal pump with an inducer, comprising a centrifugal pump main shaft (1), characterized in that: An impeller (3) is mounted at the bottom end of the centrifugal pump main shaft (1), an anti-cavitation mechanism is arranged above the impeller (3), the anti-cavitation mechanism comprises a mounting cylinder (5) sleeved on the centrifugal pump main shaft (1), the mounting cylinder (5) is detachably connected to the centrifugal pump main shaft (1), a spiral inducer (7) is mounted on the mounting cylinder (5), and a speed reduction assembly (10) is arranged on the inducer (7).

2. The anti-cavitation centrifugal pump with an inducer according to claim 1, characterized in that: A support plate (4) fixed to the centrifugal pump main shaft (1) is provided at the bottom end of the installation cylinder (5); a limit rod (8) is vertically and detachably connected to the support plate (4); a limit plate (6) is sleeved on the top end of the centrifugal pump main shaft (1); and the top end of the limit rod (8) is locked with the limit plate (6) via a nut (9).

3. The anti-cavitation centrifugal pump with an inducer according to claim 2, characterized in that: A threaded seat (11) threadably connected to the bottom end of the limiting rod (8) is fixed on the support plate (4).

4. The anti-cavitation centrifugal pump with an inducer according to claim 2, characterized in that: The speed reduction assembly (10) comprises a sleeve (101) arranged between adjacent blades of the inducer (7), and blades (102) are evenly arranged on the sleeve (101).

5. The anti-cavitation centrifugal pump with an inducer according to claim 4, characterized in that: The sleeve (101) is movably sleeved on the limiting rod (8), and the blade (102) is spiral-shaped.

6. The anti-cavitation centrifugal pump with an inducer according to claim 4, characterized in that: The blades of the inducing wheel (7) are provided with insertion holes (12) for passing the sleeve (101) and the blades (102).

7. The anti-cavitation centrifugal pump with an inducer according to claim 1, characterized in that: A mounting plate (2) is coaxially fixed to the bottom end of the centrifugal pump main shaft (1), and the impeller (3) is fixed on the mounting plate (2).

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