Multi-stage section type water pump

Abstract

The utility model provides a multi-stage sectional water pump, a split type balance disc is arranged at the rear end of a pump shaft, and the split type balance disc comprises a disc body, a balance shaft and a balance shaft, the balance bushing ring is located at the peripheral position of the disc body, a plurality of screw holes are formed in the disc body and the balance bushing ring, and the screw holes are used for fixing the disc body and the balance bushing ring through bolts; the balance spacer sleeve is arranged between the pump shaft and the balance sleeve, and the balance spacer sleeve extends in the axial direction; the disc body, the balance bushing ring and the balance spacer sleeve are of a split structure which can be detached from one another. According to the multi-stage sectional water pump, the balance disc is designed to be of a split structure, so that the balance disc is easier to replace, only one part of the balance disc needs to be replaced when the balance disc is replaced, and cost is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-stage centrifugal pumps, in particular to a multi-stage segmental water pump. Background Art

[0002] A multi-stage segmental water pump is a centrifugal pump formed by combining two or more centrifugal pumps with the same function. In terms of fluid channel structure, the medium pressure relief port of the first stage is connected to the inlet of the second stage, and the medium pressure relief port of the second stage is connected to the inlet of the third stage. Such a series connection mechanism forms a multi-stage segmental water pump. Multi-stage segmental water pumps can generate great pressure and are mostly used in applications with large head and large flow.

[0003] In the current multi-stage segmental water pump, in order to balance the axial thrust of the multi-stage impeller, a balance disc and a balance ring are arranged at the rear end of the pump shaft. Figure 1 and Figure 2 As shown in . Due to the problem of unbalanced force, the balancing disc and the balancing ring often come into contact and wear. It is generally believed that when the wear of the balancing disc reaches a certain extent (for example, 4mm), the balancing disc needs to be replaced. Figure 3 As shown, a balancing disc 5 is composed of different parts, including a disc body 51, a balancing lining ring 52 and a balancing sleeve 53, and in the existing balancing disc 5, the disc body 51, the balancing lining ring 52 and the balancing sleeve 53 are formed in one piece. The disc body 51 constitutes the main body of the balancing disc 5. The balancing lining ring 52 is located at the outer periphery of the disc body 51. The balancing sleeve 53 is located between the balancing sleeve 7 and the pump shaft 2.

[0004] Due to the problem of unbalanced force, the pump shaft will move slightly, and the balance ring 52 will contact and wear with the balance ring 6. Therefore, the balance ring 52 constitutes the main part of the balance disc wear. When the wear of the balance ring 52 reaches a certain level, the balance disc needs to be replaced.

[0005] However, since the plate body 51, the balancing lining ring 52 and the balancing stopper sleeve 53 are formed in one piece, the entire balancing plate must be replaced when it is worn, which is actually a waste. In addition, there are often some debris stuck in the contact gap between the balancing plate and the pump shaft, which makes it very difficult to remove the balancing plate. In many cases, the balancing plate has to be cut into several parts by a cutting machine for removal.

[0006] The utility model provides a multi-stage segmental water pump, which makes it easier to replace the balancing disc, and when replacing the balancing disc, only a part of it needs to be replaced, thus greatly saving the cost. Utility Model Content

[0007] The utility model provides a multi-stage segmental water pump, which makes it easier to replace the balancing disc, and when replacing the balancing disc, only a part of it needs to be replaced, thus greatly saving the cost.

[0008] The utility model provides a multi-stage segmented water pump, wherein a split balancing disc is arranged at the rear end of a pump shaft, and the split balancing disc comprises: a disc body; a balancing bushing, wherein the balancing bushing is located at the outer periphery of the disc body, and a plurality of screw holes are arranged on the disc body and the balancing bushing, wherein the plurality of screw holes are used to fix the disc body and the balancing bushing to each other by bolts; and a balancing stopper sleeve, wherein the balancing stopper sleeve is arranged between the pump shaft and the balancing bushing, and the balancing stopper sleeve extends in the axial direction; wherein the disc body, the balancing bushing and the balancing stopper sleeve are mutually detachable split structures.

[0009] Furthermore, the balancing sleeve is connected to the inner circumference of the disc body, and corresponding threads are provided at the outer circumference of the port of the balancing sleeve and the inner circumference of the port of the disc body for connecting the balancing sleeve and the disc body to each other.

[0010] The multi-stage segmented water pump provided by the utility model designs the balancing disc into a split structure, so that it is easier to replace the balancing disc, and when replacing the balancing disc, only a part of it needs to be replaced, which greatly saves the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Shown is a schematic diagram of the structure of a multi-stage segmental water pump.

[0012] Figure 2 The figure shows a schematic diagram of the existing balancing disc installation.

[0013] Figure 3 Shown is a schematic structural diagram of an existing balancing disk.

[0014] Figure 4 Shown is a schematic diagram of the assembly of a split balancing disc in an embodiment of the utility model.

[0015] Figure 5 Shown is a schematic diagram of the installation of a split balancing disc in an embodiment of the utility model.

[0016] Reference numerals:

[0017] 1: multi-stage segmental water pump; 2: pump shaft; 3: inlet end; 4: outlet end; 5: balance disc; 6: balance ring; 7: balance sleeve; 8: bolt; 51: disc body; 52: balance bushing; 53: balance stop sleeve. DETAILED DESCRIPTION

[0018] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0019] Figure 4 Shown is a schematic diagram of the assembly of a split balancing disc in an embodiment of the utility model. Figure 5 Shown is a schematic diagram of the installation of a split balancing disc in an embodiment of the utility model.

[0020] like Figure 4 and Figure 5 As shown, in the multi-stage segmental water pump provided in the embodiment of the utility model, a split balancing disc is arranged at the rear end of the pump shaft, and the split balancing disc comprises: a disc body 51; a balancing bushing 52, the balancing bushing 52 is located at the outer peripheral position of the disc body 51, and a plurality of screw holes are arranged on the disc body 51 and the balancing bushing 52, and the plurality of screw holes are used to fix the disc body 51 and the balancing bushing 52 to each other through bolts; and a balancing stopper sleeve 53, the balancing stopper sleeve 53 is arranged between the pump shaft 2 and the balancing sleeve 7, and the balancing stopper sleeve 53 extends in the axial direction. The balancing stopper sleeve 53 can be connected to the inner periphery of the disc body 51, and corresponding threads are arranged at the outer peripheral position of the port of the balancing stopper sleeve 53 and the inner peripheral position of the port of the disc body 51, which are used to connect the balancing stopper sleeve 53 and the disc body 51 to each other by threaded connection. Since the disc body 51, the balancing bushing 52 and the balancing stopper sleeve 53 are all connected by threads, the disc body 51, the balancing bushing 52 and the balancing stopper sleeve 53 become a split structure that can be detached from each other.

[0021] The balance ring 52 has the most contact with the balance ring 6 and is most worn. When the balance ring 52 is worn to a certain extent, the worn balance ring 52 can be removed and replaced with a new balance ring 52, and the disc body 51 and the balance stopper 53 can still be used, thereby greatly saving costs. In addition, since the disc body 51, the balance ring 52 and the balance stopper 53 are mutually detachable separate structures, it is easier to disassemble them, and it is not as laborious as in the prior art.

[0022] The multi-stage segmented water pump provided by the embodiment of the utility model designs the balancing disc into a split structure, which makes it easier to replace the balancing disc and only needs to replace a part of the balancing disc, thus greatly saving costs.

[0023] In the description of the present invention, it is necessary to understand that the terms “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” orientations or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A multi-stage segmental water pump, characterized in that: A split balancing disc is arranged at the rear end of the pump shaft, and the split balancing disc comprises: Plate body; A balancing ring, the balancing ring being located at the outer periphery of the disc body, and a plurality of screw holes being provided on the disc body and the balancing ring, the plurality of screw holes being used to fix the disc body and the balancing ring to each other by bolts; and A balancing sleeve, wherein the balancing sleeve is arranged between the pump shaft and the balancing sleeve, and the balancing sleeve extends in the axial direction; Wherein, the disc body, the balancing liner ring and the balancing stopper sleeve are separate structures that are detachable from each other.

2. The multi-stage segmental water pump according to claim 1, characterized in that: The balancing sleeve is connected to the inner circumference of the disc body, and corresponding threads are arranged at the outer circumference of the port of the balancing sleeve and the inner circumference of the port of the disc body for connecting the balancing sleeve and the disc body.

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