Wear-resistant screw centrifugal pump suitable for various working conditions

Abstract

This application discloses a wear-resistant spiral centrifugal pump suitable for various working conditions, belonging to the field of fluid pumps. It solves the problem in existing technologies where replacing the wear-resistant liner requires disassembling the volute casing, increasing maintenance time and costs. In this application, the shaft end is sequentially installed through the drive-side volute casing and the rear cover, and a spiral centrifugal impeller is provided therein. The suction-side volute casing includes a suction-side volute casing housing, a metal part, and a wear-resistant part. The metal part and the wear-resistant part are sequentially arranged from the suction side of the centrifugal pump towards the drive side. The surface of the wear-resistant part facing the spiral centrifugal impeller is fitted with the spiral centrifugal impeller. The metal part is attached to the side of the wear-resistant part away from the spiral centrifugal impeller and fixed to the suction-side volute casing housing with bolts. This wear-resistant spiral centrifugal pump, suitable for various working conditions, reduces production costs and saves maintenance time and costs.

Description

Technical Field

[0001] This utility model relates to a wear-resistant spiral centrifugal pump suitable for various working conditions, belonging to the field of fluid pumps. Background Technology

[0002] A spiral centrifugal pump combines the volumetric induction action of a spiral with the centrifugal action of a vane through its special three-dimensional spiral blades, thus energizing the medium. Therefore, it possesses the characteristics of both positive displacement pumps and vane pumps, representing a synergistic effect. Existing wear-resistant spiral centrifugal pumps, such as those disclosed in CN214837164U, mitigate the rapid wear of components in magnetic coagulation processes, increase the wear resistance of equipment, and reduce usage and maintenance costs; they can also handle large particle diameters, solving the clogging problem in the conveying process.

[0003] In actual project applications, the wear of the volute housing liner is relatively small, while the wear of the suction port liner is relatively large. The two parts do not need to be replaced at the same time. Only the suction port liner needs to be replaced periodically according to the usage. Due to the structural design, the volute housing must be disassembled to replace the wear-resistant liner, which increases maintenance time and cost. Utility Model Content

[0004] This invention provides a wear-resistant spiral centrifugal pump suitable for various working conditions, which reduces production costs and saves maintenance time and costs.

[0005] The technical solution adopted by this utility model is a wear-resistant spiral centrifugal pump suitable for various working conditions, including a suction side volute, a rear cover, a drive side volute, and a drive part; the suction side volute, the rear cover, and the drive side volute are arranged sequentially from the suction side to the drive side of the centrifugal pump; the drive part includes a rotating shaft, the shaft end of which is sequentially installed through the drive side volute and the rear cover and is provided with a spiral centrifugal impeller.

[0006] The suction-side volute includes a suction-side volute housing, a metal part, and a wear-resistant part; the metal part and the wear-resistant part are arranged sequentially from the suction side to the drive side of the centrifugal pump.

[0007] The wear-resistant part is configured to mate with the spiral centrifugal impeller on the side facing the wear-resistant part; the metal part is attached to the side of the wear-resistant part away from the spiral centrifugal impeller and is fixed to the suction side volute housing by bolts.

[0008] The optimized wear-resistant spiral centrifugal pump described above, applicable to various working conditions, has an opening in the middle of the suction side volute housing to accommodate the wear-resistant part. The wear-resistant part is installed in the opening in the middle of the suction side volute housing and is fixed in the opening in the middle of the suction side volute housing by pressing with a metal part.

[0009] The optimized wear-resistant spiral centrifugal pump described above, applicable to various working conditions, has an inlet that penetrates the wear-resistant part in the middle, and the inlet extends into and through the metal part from the side facing the metal part.

[0010] The optimized wear-resistant spiral centrifugal pump described above, applicable to various working conditions, has a positioning groove built on the surface of the wear-resistant part facing the metal part; and a protrusion built on the metal part to cooperate with the positioning groove.

[0011] The suction-side vortex housing has a positioning part, and the wear-resistant part has a positioning structure that cooperates with the positioning part.

[0012] The optimized wear-resistant spiral centrifugal pumps described above, suitable for various working conditions, have wear-resistant parts made of polypropylene or polyethylene integrally molded parts, or wear-resistant parts made of silicon carbide or silicon nitride 3D printed parts.

[0013] The optimized wear-resistant spiral centrifugal pump described above, suitable for various working conditions, has several O-rings between the metal parts and the wear-resistant parts.

[0014] The optimized wear-resistant spiral centrifugal pump, applicable to various working conditions, has a tapered section on the wear-resistant part facing the spiral centrifugal impeller that mates with the spiral centrifugal impeller.

[0015] The advantages of this application are as follows: In the technical solution of this application, by changing the structure of the wear-resistant liner, it can be made of a variety of materials and is suitable for different working conditions. Polypropylene and polyethylene materials can be manufactured by processing, while silicon carbide or silicon nitride can be manufactured by 3D printing, which reduces the production cost. By changing the installation method, replacing the wear-resistant liner only requires disassembling the wear-resistant liner screws, without disassembling the volute housing, which saves maintenance time and costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this application. Detailed Implementation

[0017] The technical features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] As shown in the figure, this utility model is a wear-resistant spiral centrifugal pump suitable for various working conditions, mainly including a bearing bracket 3, a bearing 4, a rotating shaft 5, an oil chamber 6, a sealing seat 7, a drive-side volute 8, a rear cover 9, a spiral centrifugal impeller 2, a suction-side volute, an inlet 104, and an outlet 10.

[0019] The drive-side volute 8 and the suction-side volute 8 are joined together to form a volute housing. The bearing bracket 3, oil chamber 6, sealing seat 7, rear cover 9, and volute housing are arranged sequentially from the drive side to the suction side of the centrifugal pump.

[0020] The bearing bracket 3 is rotatably connected to the rotating shaft 5 via the bearing 4. The rotating shaft 5 is sequentially installed inside the oil chamber 6, the sealing seat 7, the rear cover 9, and the volute. A spiral centrifugal impeller 2 is mounted on the rotating shaft 5. The side of the suction-side volute is provided with an inlet 104, and the top of the suction-side volute and the drive-side volute 8 are spliced ​​together with an outlet 10.

[0021] In the structure of this application, a bearing 4 is installed on the rotating shaft 5, and then the entire structure is installed on the bearing bracket 3. The bearing bracket 3, oil chamber 6, sealing seat 7, rear cover 9, and drive-side volute 8 are assembled together. The spiral centrifugal impeller 2 is installed on the rotating shaft 5. After the suction-side volute is assembled, the whole assembly is bolted to the drive-side volute 8. Specifically, the suction-side volute housing 103 can be bolted to the drive-side volute 8. Finally, it is connected to a motor with matching power.

[0022] In this application, the suction side volute includes a suction side volute housing 103, a metal part 101, and a wear-resistant part 102, which are arranged sequentially from the suction side to the drive side of the centrifugal pump.

[0023] The surface of the wear-resistant portion 102 facing the spiral centrifugal impeller 2 is configured to mate with the spiral centrifugal impeller 2. In one embodiment of this application, the surface of the wear-resistant portion 102 facing the spiral centrifugal impeller 2 is constructed with a tapered portion that mates with the spiral centrifugal impeller 2. The metal portion 101 is attached to the side of the wear-resistant portion 102 away from the spiral centrifugal impeller 2 and is fixed to the suction-side volute housing 103 by bolts.

[0024] In one embodiment of this application, in order to facilitate the connection and positioning of the wear-resistant part 102 and the suction-side volute housing 103, an opening for accommodating the wear-resistant part 102 is constructed in the middle of the suction-side volute housing 103. The wear-resistant part 102 can be partially installed in the opening installed in the middle of the suction-side volute housing 103. Then, the metal part 101 is fastened onto the wear-resistant part 102, and the metal part 101 is fixed to the suction-side volute housing 103 by bolts.

[0025] In one embodiment of this application, the water inlet 104 is constructed in the middle of the wear-resistant portion 102. The water inlet 104 penetrates the wear-resistant portion 102 and is configured to cooperate with the spiral centrifugal impeller 2. The water inlet 104 is directly opposite the water inlet area of ​​the spiral centrifugal impeller 2.

[0026] As shown in the figure, the water inlet 104 extends towards and through the metal part 101 on the side facing the metal part 101, which increases the wear resistance of the water inlet part of the pump body and enables it to have a longer service life when pumping solid-liquid mixed media.

[0027] In one embodiment of this application, a positioning groove is formed on the surface of the wear-resistant portion 102 facing the metal portion 101, and a protrusion is formed on the metal portion 101 that mates with the positioning groove. The engagement of the positioning groove and the protrusion increases the stability of the wear-resistant portion 102 during installation. Positioning and limiting through the engagement of the positioning groove and the protrusion reduces shaking. Furthermore, during installation of the metal portion 101, the engagement of the positioning groove and the protrusion positions the metal portion 101, improving installation convenience and stability. In this application, the shape and structure of the positioning groove and the protrusion can adopt common technical solutions in the prior art.

[0028] In one embodiment of this application, a positioning part is constructed on the suction-side volute housing 103, and a positioning structure is constructed on the wear-resistant part 102 to cooperate with the positioning part. The cooperation between the positioning part and the positioning structure can increase the firmness of the wear-resistant part 102 when it is installed on the suction-side volute housing 103. Positioning and limiting by the cooperation between the positioning part and the positioning structure can reduce shaking and improve installation convenience and installation position stability. In this application, the shape and structure of the positioning part and the positioning structure can adopt common technical solutions in the prior art, such as the form of protrusions and grooves for insertion positioning and limiting.

[0029] In one embodiment of this application, the wear-resistant part 102 can be a one-piece molded part made of polypropylene or polyethylene. In other embodiments of this application, the wear-resistant part 102 can be a 3D printed part made of silicon carbide or silicon nitride. Polypropylene and polyethylene materials can be manufactured through processing, while silicon carbide or silicon nitride can be manufactured through 3D printing, reducing production costs. By changing the installation method, replacing the wear-resistant liner only requires removing the bolts of the metal part 101, without disassembling the entire volute housing, saving maintenance time and costs, extending the service life of the equipment, and reducing maintenance costs.

[0030] In one embodiment of this application, a plurality of O-rings are provided between the metal portion 101 and the wear-resistant portion 102 to increase the gap sealing performance.

[0031] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A wear-resistant spiral centrifugal pump suitable for various working conditions, comprising a suction-side volute, a rear cover, a drive-side volute, and a drive unit; the suction-side volute, rear cover, and drive-side volute are arranged sequentially from the suction side to the drive side of the centrifugal pump; the drive unit includes a rotating shaft, the shaft end of which is sequentially disposed through the drive-side volute and the rear cover and is provided with a spiral centrifugal impeller (2); characterized in that: The suction-side volute includes a suction-side volute housing (103), a metal part (101), and a wear-resistant part (102); the metal part (101) and the wear-resistant part (102) are arranged sequentially from the suction side to the drive side of the centrifugal pump; The wear-resistant part (102) is provided with the surface facing the spiral centrifugal impeller (2) in conjunction with the spiral centrifugal impeller (2); the metal part (101) is attached to the side of the wear-resistant part (102) away from the spiral centrifugal impeller (2) and is fixed to the suction side volute housing (103) by bolts.

2. The wear-resistant spiral centrifugal pump applicable to various working conditions according to claim 1, characterized in that: The intake-side volute housing (103) has an opening in the middle to accommodate the wear-resistant part (102). The wear-resistant part (102) is installed in the opening in the middle of the intake-side volute housing (103) and is fixed in the opening in the middle of the intake-side volute housing (103) by pressing with a metal part (101).

3. The wear-resistant spiral centrifugal pump applicable to various working conditions according to claim 1, characterized in that: The wear-resistant part (102) has a water inlet (104) that penetrates the wear-resistant part (102) in the middle. The water inlet (104) extends toward the metal part (101) and penetrates the metal part (101) on the side facing the metal part (101).

4. The wear-resistant spiral centrifugal pump applicable to various working conditions according to claim 1, characterized in that: The wear-resistant part (102) has a positioning groove on its surface facing the metal part (101); the metal part (101) has a protrusion that mates with the positioning groove. The suction-side vortex housing (103) is provided with a positioning part, and the wear-resistant part (102) is provided with a positioning structure that cooperates with the positioning part.

5. The wear-resistant spiral centrifugal pump applicable to various working conditions according to claim 1, characterized in that: The wear-resistant part (102) is a one-piece molded part of polypropylene or polyethylene, or the wear-resistant part (102) is a 3D printed part of silicon carbide or silicon nitride.

6. The wear-resistant spiral centrifugal pump applicable to various working conditions according to claim 1, characterized in that: A plurality of O-rings are provided between the metal part (101) and the wear-resistant part (102).

7. The wear-resistant spiral centrifugal pump applicable to various working conditions according to claim 1, characterized in that: The wear-resistant part (102) has a tapered portion on the surface facing the spiral centrifugal impeller (2) that is configured to cooperate with the spiral centrifugal impeller (2).

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