High-speed pump capable of reducing faults

Abstract

The utility model provides a high-speed pump capable of reducing fault occurrence, which comprises a high-speed pump cylinder body and a high-speed pump shaft rod, the high-speed pump shaft rod used for driving a multi-stage impeller to rotate is rotatably arranged in the high-speed pump cylinder body, and a left side pump cover is arranged on the left side of the high-speed pump cylinder body. Compared with the prior art, the high-speed pump has the advantages that the first cavity and the second cavity are continuously arranged on the left side of the high-speed pump cylinder, the first cavity and the second cavity can slow down pressure rise when liquid enters the high-speed pump, and the liquid is effectively prevented from generating more bubbles after being suddenly boosted; due to the fact that the first cavity and the second cavity exist, and the first-stage impeller and the second-stage impeller are arranged in the mode of intersecting with the first cavity and the second cavity, generation of bubbles is reduced while the conveying capacity is not affected, the cavitation resistance of the high-speed pump is improved, and the fault occurrence rate of the high-speed pump is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-speed pumps, and particularly relates to a high-speed pump with reduced failures. Background Art

[0002] With the continuous improvement of scientific and technological levels, the performance requirements for high-speed pumps in pipeline system operation have become more stringent. The use of anti-cavitation performance of high-speed pumps is an important development direction, which can greatly reduce the equipment cost of system operation and better ensure production efficiency and operation reliability. Therefore, at this stage, strengthening the research on the development of anti-cavitation performance of high-speed pumps has important practical significance, which can more comprehensively understand the different types and practical characteristics of high-speed pumps, and combine with future development trends to better promote the practical development of high-speed pumps.

[0003] The structure of the high-speed pump's anti-cavitation performance is to disperse the pressure between the high-speed pump stages with the help of new hydraulics and new structures, thereby improving the high-speed pump's anti-cavitation performance. The first stage of the existing high-speed pump adopts a double-suction structure. In the traditional working mode, the pump type is selected by confirming the pressure difference according to the working conditions. Relatively speaking, the hydraulics are relatively fixed, the pressure difference is fixed, and the shape is relatively confirmed. It is difficult to change the pump shape, which is relatively rigid. Therefore, we hope to design a high-speed pump with a new structure to solve this problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a high-speed pump that reduces the occurrence of failures and solves the problems raised in the above-mentioned background technology.

[0005] The utility model is realized by the following technical scheme: a high-speed pump for reducing the occurrence of faults, comprising: a high-speed pump barrel and a high-speed pump shaft rod, wherein a high-speed pump shaft rod for driving a multi-stage impeller to rotate is rotatably installed inside the high-speed pump barrel, and a left pump cover is installed on the left side of the high-speed pump barrel;

[0006] A mechanical seal for forming a sealing structure is installed on the left side of the left pump cover, and an inlet interface is fixed on the upper side of the left end of the high-speed pump cylinder, and the inside of the inlet interface is fixedly connected to the left end of the balance pipe;

[0007] A first-stage impeller is installed on the left side of the high-speed pump shaft, and a second-stage impeller is installed on the left side of the high-speed pump shaft.

[0008] As a preferred embodiment, the left end of the high-speed pump shaft rod horizontally penetrates the mechanical seal, the left end of the high-speed pump shaft rod horizontally penetrates the left pump cover, and the high-speed pump shaft rod is rotatably installed in the middle of the high-speed pump barrel.

[0009] As a preferred embodiment, a first cavity is provided on the left side of the high-speed pump cylinder, and a second cavity is provided on the left side of the high-speed pump cylinder. The upper side of the first cavity is connected with the interior on the left side of the lower end of the entrance interface, and the upper side of the second cavity is connected with the interior on the right side of the lower end of the entrance interface. The setting of the first cavity can avoid the problem of a sharp increase in pressure when the liquid just enters the high-speed pump.

[0010] As a preferred embodiment, the lower end of the balance pipe extends to the interior of the upper end of the first cavity, and a first-stage impeller chamber is arranged between the first cavity and the second cavity. The first-stage impeller is rotatably installed inside the first-stage impeller chamber. In actual use, the first cavity cooperates with the second cavity to effectively prevent the problem of a sharp increase in pressure when the liquid just enters the high-speed pump, avoid the generation of more bubbles, and reduce the probability of the high-speed pump being affected by cavitation.

[0011] As a preferred embodiment, the first cavity is located on the left side of the second cavity, the first-stage impeller is located on the left side of the second-stage impeller, and the second-stage impeller is located on the right side of the second cavity.

[0012] As a preferred embodiment, a secondary impeller chamber is provided on the right side of the second cavity, a second-stage impeller is rotatably mounted in the secondary impeller chamber, and both the first-stage impeller and the second-stage impeller are single-stage impellers.

[0013] After adopting the above technical solution, the beneficial effects of the utility model are: by continuously arranging the first cavity and the second cavity on the left side of the high-speed pump barrel, it is effectively prevented that a large number of bubbles are generated after the liquid is rapidly pressurized, and the cavitation effect on the high-speed pump during operation is greatly reduced;

[0014] The arrangement of the first-stage impeller and the second-stage impeller, due to the existence of the first cavity and the second cavity, and the first-stage impeller and the second-stage impeller are arranged crosswise with the first cavity and the second cavity, which reduces the generation of bubbles without affecting the delivery volume, improves the anti-cavitation ability of the high-speed pump, and reduces the occurrence rate of high-speed pump failure. It is not only efficient but also simple and clear, and the impeller space arrangement method becomes more flexible, so that the structure of the entire high-speed pump has greater flexibility, and the space arrangement can be more flexibly customized according to customer needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1It is a schematic diagram of the internal structure of a high-speed pump in the prior art.

[0017] Figure 2 The utility model is a schematic diagram of the partial internal structure of a high-speed pump for reducing the occurrence of failures.

[0018] In the figure, 100-high-speed pump barrel, 110-mechanical seal, 120-left pump cover, 130-balance pipe, 140-entry interface, 150-first cavity, 160-second cavity;

[0019] 200-high-speed pump shaft, 210-first-stage impeller, 220-second-stage impeller. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 to Figure 2 The utility model provides a technical solution: a high-speed pump for reducing the occurrence of failures, comprising: a high-speed pump barrel 100 and a high-speed pump shaft 200, the high-speed pump barrel 100 is rotatably installed with the high-speed pump shaft 200 for driving the multi-stage impeller to rotate, and a left pump cover 120 is installed on the left side of the high-speed pump barrel 100;

[0022] A mechanical seal 110 for forming a sealing structure is installed on the left side of the left pump cover 120, and an inlet interface 140 is fixed on the upper side of the left end of the high-speed pump barrel 100, and the inside of the inlet interface 140 is fixedly connected to the left end of the balance pipe 130;

[0023] A first-stage impeller 210 is installed on the left side of the high-speed pump shaft 200 , and a second-stage impeller 220 is installed on the left side of the high-speed pump shaft 200 .

[0024] The left end of the high-speed pump shaft rod 200 horizontally penetrates the mechanical seal 110 , and the left end of the high-speed pump shaft rod 200 horizontally penetrates the left pump cover 120 . The high-speed pump shaft rod 200 is rotatably installed in the middle of the high-speed pump barrel 100 .

[0025] See also Figure 2A first cavity 150 is provided on the left side of the high-speed pump barrel 100, and a second cavity 160 is provided on the left side of the high-speed pump barrel 100. The upper side of the first cavity 150 is connected with the left interior of the lower end of the inlet interface 140, and the upper side of the second cavity 160 is connected with the right interior of the lower end of the inlet interface 140. The setting of the first cavity 150 can avoid the problem of a sharp rise in pressure when the liquid just enters the high-speed pump.

[0026] The lower end of the balance pipe 130 extends to the upper end of the first cavity 150. A first-stage impeller chamber is provided between the first cavity 150 and the second cavity 160. A first-stage impeller 210 is rotatably installed inside the first-stage impeller chamber. In actual use, the first cavity 150 cooperates with the second cavity 160 to effectively prevent the problem of a sharp increase in pressure when the liquid just enters the high-speed pump, avoid the generation of a large number of bubbles, and reduce the probability of the high-speed pump being affected by cavitation.

[0027] The first cavity 150 is located on the left side of the second cavity 160 , the first-stage impeller 210 is located on the left side of the second-stage impeller 220 , and the second-stage impeller 220 is located on the right side of the second cavity 160 .

[0028] As the first embodiment of the utility model, in actual use, when the liquid enters the left end of the high-speed pump cylinder through the inlet interface 140, since no impeller is installed in the first cavity 150 and the second cavity 160, the liquid is effectively prevented from rapidly increasing the pressure of the liquid after entering the high-speed pump cylinder 100. As is well known, more bubbles will be generated when the liquid is under high pressure, and the bursting of bubbles can easily cause cavitation to the internal components of the high-speed pump. The existence of the first cavity 150 and the second cavity 160 can slow down the pressure rise when the liquid enters, effectively preventing the liquid from generating more bubbles after a sharp pressure increase, and greatly reducing the cavitation effect on the high-speed pump during operation.

[0029] See also Figure 1 to Figure 2 A secondary impeller chamber is provided on the right side of the second cavity 160, in which a second-stage impeller 220 is rotatably installed. Both the first-stage impeller 210 and the second-stage impeller 220 are single-stage impellers.

[0030] As the second embodiment of the utility model, based on the above-mentioned first embodiment, in actual use, when liquid enters the left side of the high-speed pump barrel 100, due to the existence of the first cavity 150 and the second cavity 160, and the first-stage impeller 210 and the second-stage impeller 220 are cross-arranged with the first cavity 150 and the second cavity 160, the generation of bubbles is reduced without affecting the delivery volume, thereby improving the anti-cavitation ability of the high-speed pump and reducing the occurrence rate of high-speed pump failure. It is not only efficient but also simple and clear, and the impeller space layout method becomes more flexible, so that the structure of the entire high-speed pump has greater flexibility, and the space layout can be more flexibly customized according to customer needs.

[0031] 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. A high-speed pump with reduced failure, comprising: A high-speed pump barrel (100) and a high-speed pump shaft (200), characterized in that a high-speed pump shaft (200) for driving a multi-stage impeller to rotate is rotatably installed inside the high-speed pump barrel (100), and a left pump cover (120) is installed on the left side of the high-speed pump barrel (100); A mechanical seal (110) for forming a sealing structure is installed on the left side of the left pump cover (120); an inlet interface (140) is fixed on the upper side of the left end of the high-speed pump barrel (100); the inside of the inlet interface (140) is fixedly connected to the left end of the balance pipe (130); A first-stage impeller (210) is installed on the left side of the high-speed pump shaft (200), and a second-stage impeller (220) is installed on the left side of the high-speed pump shaft (200); A first cavity (150) is disposed on the left side of the high-speed pump barrel (100), and a second cavity (160) is disposed on the left side of the high-speed pump barrel (100); The first cavity (150) is located on the left side of the second cavity (160), the first-stage impeller (210) is located on the left side of the second-stage impeller (220), and the second-stage impeller (220) is located on the right side of the second cavity (160); A secondary impeller chamber is provided on the right side of the second cavity (160), and a second-stage impeller (220) is rotatably mounted in the secondary impeller chamber. Both the first-stage impeller (210) and the second-stage impeller (220) are single-stage impellers.

2. A high-speed pump for reducing the occurrence of failures as claimed in claim 1, characterized in that: The left end of the high-speed pump shaft (200) horizontally penetrates the mechanical seal (110), the left end of the high-speed pump shaft (200) horizontally penetrates the left pump cover (120), and the high-speed pump shaft (200) is rotatably installed in the middle of the high-speed pump barrel (100).

3. A high-speed pump with reduced failure as claimed in claim 2, characterized in that: The upper side of the first cavity (150) is in communication with the left interior of the lower end of the entry interface (140), and the upper side of the second cavity (160) is in communication with the right interior of the lower end of the entry interface (140).

4. A high-speed pump with reduced failure as claimed in claim 1, characterized in that: The lower end of the balance pipe (130) extends to the interior of the upper end of the first cavity (150); a first-stage impeller chamber is provided between the first cavity (150) and the second cavity (160); a first-stage impeller (210) is rotatably mounted inside the first-stage impeller chamber.

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