A corrosion-resistant impeller for stainless steel water pumps

Abstract

This utility model discloses a corrosion-resistant impeller for stainless steel water pumps, including a gland, a wheel seat, and several blades. The blades are evenly distributed along the circumference of the wheel seat. The gland is located at both ends of the wheel seat, and a pressure ring is movably fitted around the outer circumference of the gland. Several screws are provided on the surface of the pressure ring. The blade ends are provided with threaded sleeves that mate with the screws. The opposing surfaces of the wheel seat and the gland have engagement grooves for inserting the blades. The gland, wheel seat, and blades are all made of stainless steel and undergo anti-corrosion treatment. A swing gap is provided between the engagement groove and the blades. A positioning structure is provided on the blade surface, and an elastic buffer washer is provided between the pressure ring and the screws. This structure enables the blades to be disassembled, replaced, and swing slightly, improving the impeller's adaptability and hydraulic stability in corrosive environments, and providing excellent corrosion resistance and ease of maintenance.

Description

Technical Field

[0001] This utility model relates to the field of water pump impeller technology, specifically a corrosion-resistant impeller for stainless steel water pumps. Background Technology

[0002] As a common fluid transport device in industrial, civil, and municipal water supply and drainage systems, water pumps rely heavily on their core component—the impeller—which plays a decisive role in the pump's hydraulic performance and operational stability. Traditional water pump impellers often employ a monolithic casting structure. This integrated molding process prevents the disassembly or replacement of individual blades. If a blade corrodes or is damaged, the entire impeller often needs to be replaced, resulting in high maintenance costs, prolonged downtime, and reduced system efficiency.

[0003] To improve corrosion resistance, stainless steel is commonly used for impellers in existing technologies. However, most of these methods only enhance corrosion resistance at the overall material selection level, lacking structural optimization. For example, some structures use sprayed or electroplated anti-corrosion coatings, but these coatings are prone to wear under long-term high-speed fluid erosion, leading to protective failure. Furthermore, the rigid blade fixing method in traditional structures means that during pump operation, when encountering fluctuating inlet water flow or fluids containing particulate impurities, the fixed blades may be subjected to uneven water flow or impacts from foreign objects, resulting in localized fatigue or even breakage, affecting operational reliability.

[0004] Meanwhile, most existing water pump impellers adopt a rigid fixed blade structure, which cannot adapt to flow disturbances under complex operating conditions. When the pump operates under variable flow or non-design operating conditions, the mismatch between the inlet angle and the fixed blade angle can easily cause adverse phenomena such as increased hydraulic losses, cavitation, and vibration, affecting the pump's operating efficiency and service life.

[0005] Therefore, there is still a lack of an impeller design scheme in the existing technology that is structurally detachable, has a certain degree of free swinging ability during operation, and at the same time has good corrosion resistance, so as to meet the requirements of operational stability under complex working conditions and ease of maintenance. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a corrosion-resistant impeller for a stainless steel water pump, comprising: a gland, a wheel seat, and several blades. The blades are evenly distributed along the circumference of the wheel seat, and glands are provided on both sides for stable positioning. A pressure ring is sleeved on the outside of the gland, and several screws are provided on the surface of the pressure ring. The screws are used to cooperate with the threaded sleeves provided at the ends of the blades for fixation. The wheel seat and the side of the gland facing the blades are provided with a mating groove for inserting the blade surface. This structure, through the matching gap setting, enables the blades to have controllable swing space during high-speed operation, improving the self-adaptability of the water pump operation.

[0008] In a preferred embodiment, the gland, impeller seat, and blades are all made of stainless steel and subjected to anti-corrosion treatment. The gland and impeller seat are covered with an epoxy resin coating, while the blades undergo surface strengthening treatment using passivation or nitriding processes. Specifically, this configuration effectively improves the overall corrosion resistance of the impeller and extends its service life in corrosive environments such as acids, alkalis, and moisture.

[0009] In a preferred embodiment, the pressure ring is further configured such that its cross-sectional shape is a right-angled structure, with one right-angled surface of the pressure ring fitting snugly against the pressure cap, and the inner diameter of the other side being larger than the outer diameter of the pressure ring, forming a stable sleeve structure. Specifically, this structure helps to improve the positioning accuracy of the pressure ring installation and enhances the stability of the blade limiting structure.

[0010] In a preferred embodiment, the wheel seat and the gland have a fitting gap between the engagement groove and the blade, and this gap is greater than the blade surface thickness, thus forming a reserved swing space after assembly. Specifically, this structure allows the blade to swing to a certain extent during high-speed operation of the pump body, thereby dynamically adjusting the water inlet direction and mitigating fluid impact.

[0011] In a preferred embodiment, the blade surface is further configured with several positioning protrusions for engaging with the inner wall of the engagement groove to prevent radial or axial displacement of the blade and limit its maximum swing angle range. Specifically, this structure enhances the stability of the blade during operation while maintaining its swing capability, preventing dislocation or abnormal vibration.

[0012] In a preferred embodiment, the threaded sleeve is further configured such that it is fixed to the screw rod via a threaded connection and positioned on the outer edge of the blade, facilitating quick disassembly and replacement in case of blade damage or corrosion. Specifically, this design significantly improves structural maintenance convenience and reduces pump operation and maintenance costs.

[0013] In a preferred embodiment, an elastic buffer washer is provided between the pressure ring and the screw to absorb the instantaneous impact force generated during the oscillation of the blades. Specifically, this buffer structure can improve the pump body's vibration resistance during operation and extend the fatigue life of the connection structure.

[0014] In summary, this utility model, through its modular structure, blade swing gap design, and corrosion-resistant material design, achieves an integrated improvement in the detachability, corrosion resistance, and operational stability of stainless steel water pump impellers, and possesses significant potential for widespread application.

[0015] The beneficial effects achieved by this utility model are as follows:

[0016] 1. In this utility model, a detachable blade structure is adopted, which enables quick replacement through the cooperation of the screw sleeve and the screw rod. Combined with the all-stainless steel material and surface anti-corrosion treatment, the service life and maintenance convenience of the water pump impeller under corrosive conditions are significantly improved.

[0017] 2. In this utility model, a split assembly structure is adopted. By leaving gaps in the joint groove and setting elastic buffer components, the blades have a certain oscillation ability, which can dynamically adjust the inflow direction during the operation of the water pump, enhance fluid adaptability, and effectively improve the hydraulic stability and efficiency of the pump body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0019] Figure 2 This is an exploded structural diagram of one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the wheel seat and blade structure according to an embodiment of the present invention.

[0021] Figure label:

[0022] 100. Gland; 110. Pressure ring; 111. Screw; 120. Engagement groove;

[0023] 200, wheel seat; 300, blade; 310, threaded sleeve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0025] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0026] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a corrosion-resistant impeller for a stainless steel water pump.

[0027] Combination Figures 1-3As shown, the present invention provides a corrosion-resistant impeller for a stainless steel water pump, comprising: a pressure cap 100, a wheel seat 200, and a plurality of blades 300. The plurality of blades 300 are evenly distributed circumferentially on the outer circumferential surface of the wheel seat 200; the pressure cap 100 is disposed at both ends of the wheel seat 200, and a pressure ring 110 is movably sleeved on the outer circumference of each pressure cap 100; a plurality of screws 111 are provided on the outer surface of each pressure ring 110; the end of each blade 300 is provided with a threaded sleeve 310 adapted to the screws 111 for fixing the blade 300 onto the pressure ring 110.

[0028] To achieve the structural connection between the blade 300, the wheel seat 200, and the pressure cap 100, multiple engagement grooves 120 are respectively formed on the opposite surfaces of the wheel seat 200 and the pressure cap 100 for insertion into the corresponding surfaces of the blade 300, serving as a limiting and positioning function. The engagement grooves 120 have gaps in the width direction to create a certain swing space, allowing the blade 300 to have a slight swinging ability during operation, which is beneficial for adapting to fluid disturbances.

[0029] The gland 100, wheel seat 200, and blade 300 are all made of stainless steel and have undergone surface anti-corrosion treatment. Specifically, the surfaces of the gland 100 and wheel seat 200 are coated with a water-corrosion-resistant epoxy resin coating, while the surface of the blade 300 is nitrided or passivated to enhance its overall corrosion resistance and extend the service life of the water pump in corrosive environments.

[0030] In a preferred embodiment, the cross-sectional structure of the pressure ring 110 is right-angled. One right-angled surface of the pressure ring 110 is fitted to the side wall surface of the pressure cover 100, and the other right-angled surface faces outward and its inner diameter is larger than the outer diameter of the pressure ring 110 itself, thereby achieving the dual effect of fitting and positioning, which is beneficial to the stable installation of the pressure ring 110 and the stable positioning of the blade 300.

[0031] In actual assembly, the engagement groove 120 between the pressure cap 100 and the wheel seat 200 is wider than the surface thickness of the blade 300, thus providing a preset swing gap. Combined with the threaded engagement between the threaded sleeve 310 and the screw 111, the blade 300 can not only be securely installed, but also achieve a small range of deflection during operation, thereby reducing the impact of water flow on the blade structure and improving operational stability.

[0032] In addition, in order to further limit and control the oscillation of the blade 300 during the assembly process, the surface of the blade 300 is provided with several positioning protrusions for cooperating with the inner wall of the engagement groove 120, thereby ensuring that the blade 300 can remain stable in both the circumferential and axial directions and limiting its oscillation angle range.

[0033] The threaded sleeve 310 is threadedly connected to the screw 111 and is located on the outer periphery of the blade 300 to achieve detachable fixing of the blade 300. This structure allows for quick replacement of the blade after corrosion or damage through simple disassembly and assembly, greatly improving maintenance convenience and reducing operation and maintenance costs.

[0034] To further buffer the vibration and impact that may occur during the operation of the water pump, an elastic buffer washer is provided between the pressure ring 110 and the screw 111. The elastic washer can effectively absorb the impact load generated by the oscillation of the blades 300 during the operation of the water pump, extend the service life of the components, and improve the smoothness of the water pump operation.

[0035] This utility model has a simple structure and is easy to assemble and disassemble, and is suitable for various water pump equipment that requires high corrosion resistance and high stability operation.

[0036] Working principle and usage process of this utility model:

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A corrosion-resistant impeller for a stainless steel water pump, characterized in that, include: The wheel base (200) consists of a cap (100), a wheel seat (200), and several blades (300). The blades (300) are evenly distributed in a circumferential direction on the surface of the wheel seat (200). The cap (100) is arranged on both sides of the wheel seat (200), and a pressure ring (110) is movably sleeved on the outer periphery of the cap (100). The surface of the pressure ring (110) is provided with several screws (111). The end of each blade (300) is provided with a threaded sleeve (310) that is adapted to the screws (111). The opposing surfaces of the wheel seat (200) and the cap (100) are provided with engagement grooves (120) for insertion into the surface of the blades (300).

2. The corrosion-resistant impeller for a stainless steel water pump according to claim 1, characterized in that, The gland (100), wheel seat (200) and blade (300) are all made of stainless steel and their surfaces are coated with an anti-corrosion coating. The surfaces of the gland (100) and wheel seat (200) are treated with a water-resistant epoxy resin coating, and the surfaces of the blade (300) are treated with nitriding or passivation to enhance corrosion resistance.

3. The corrosion-resistant impeller for a stainless steel water pump according to claim 1, characterized in that, The pressure ring (110) has a right-angled cross section, and one right-angled surface of the pressure ring (110) abuts against the surface of the pressure cap (100). The other right-angled surface of the pressure ring (110) is arranged opposite to the outer periphery of the pressure ring (110), and the inner diameter of the right-angled surface is larger than the outer diameter of the pressure ring (110).

4. The corrosion-resistant impeller for a stainless steel water pump according to claim 1, characterized in that, The gap between the engagement groove (120) on the surface of the cap (100) and the wheel seat (200) is greater than the surface thickness of the blade (300) to provide an oscillation gap between the blade (300) and the pressure ring (110), thereby allowing the blade (300) to oscillate controllably during high-speed impeller operation.

5. The corrosion-resistant impeller for a stainless steel water pump according to claim 1, characterized in that, The blade (300) has a plurality of positioning protrusions on its surface. The positioning protrusions cooperate with the engagement groove (120) to limit the position of the blade (300) and provide the swing clearance of the blade (300).

6. The corrosion-resistant impeller for a stainless steel water pump according to claim 1, characterized in that, The threaded sleeve (310) is connected to the screw (111) by a thread, and the threaded sleeve (310) is used to fix the outer peripheral edge of the blade (300), fix the blade (300) to the surface of the pressure ring (110), and realize the detachable installation of the blade (300).

7. The corrosion-resistant impeller for a stainless steel water pump according to claim 1, characterized in that, The pressure ring (110) is provided with an elastic buffer washer, which is located between the screw (111) and the pressure ring (110) to absorb the impact force generated by the swing of the blades (300) during the operation of the water pump.

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