Coaxial two-phase flow pump

Abstract

The utility model relates to a coaxial two-phase flow pump. The coaxial two-phase flow pump comprises a pump body, an impeller, a pump cover, a mechanical seal, a motor and a base, the pump body and the impeller are coaxial, a blade top gap S1 is formed between the impeller and the pump body, and a blade top gap S2 is formed between the impeller and the pump cover; the pump cover and the pump body are detachably and fixedly connected together, the pump cover and the motor are detachably and fixedly connected together, and the pump cover is located between the pump body and the motor; the motor is fixed on the base; the pump body is fixed on the base; the impeller is fixedly and detachably fixed on a shaft of the motor; a finish machining position is arranged on the inner wall of the pump body. According to the utility model, a coaxial structure is adopted, and the finish-machined inner wall of the pump body is used for replacing the existing wear-resisting plate; an existing bearing component and motor structure is replaced by a coaxial structure, and blade top gaps are uniform.

Description

Technical Field

[0001] This utility model relates to a two-phase flow pump, specifically a two-phase flow pump with a modified structure that uses a coaxial structure, where the pump and motor are perfectly aligned and the blade tip clearance is uniform. Background Technology

[0002] Two-phase flow pumps are a type of centrifugal pump. Existing two-phase flow pumps adopt a split-shaft structure, and the flow passage part adopts an open or semi-open impeller + wear-resistant plate structure.

[0003] The overall design adopts a split-shaft structure, with the flow passage section using an open or semi-open impeller + wear-resistant plate structure. This results in a complex structure, high production costs, and a large installation space requirement. It is prone to problems such as misalignment between the pump shaft and motor shaft, and uneven wear between the impeller and the wear-resistant plate, which affect the safe operation of the unit. Furthermore, the split-shaft structure has relatively low transmission efficiency. Figure 1 Here are structural diagrams of commonly used existing products, such as Figure 1 As shown, the wear-resistant plate 17 is fixedly mounted on the impeller with screws. Utility Model Content

[0004] To address the aforementioned problems, the main objective of this utility model is to provide a coaxial two-phase flow pump with a modified structure, featuring complete alignment between the pump and motor, and uniform blade tip clearance.

[0005] This utility model solves the above-mentioned technical problems through the following technical solution: a coaxial two-phase flow pump, comprising: a pump body, an impeller, a pump cover, a mechanical seal, a motor, and a base; the pump body and the impeller are coaxial, with a blade tip clearance S1 between the impeller and the pump body, and a blade tip clearance S2 between the impeller and the pump cover; the pump cover is detachably and fixedly connected to the pump body, and the pump cover is detachably and fixedly connected to the motor, with the pump cover located between the pump body and the motor; the motor is fixed to the base; the pump body is fixed to the base; the impeller is detachably and fixedly fixed to the shaft of the motor; the inner wall of the pump body has a precision-machined part.

[0006] In a specific embodiment of this utility model, the range of S1 and S2 is 0.5 to 1.0 mm.

[0007] In a specific embodiment of this utility model, the pump body and the pump cover are connected by bolts.

[0008] In a specific embodiment of this utility model, an O-ring is installed between the pump body and the pump cover.

[0009] In a specific embodiment of this utility model, the pump cover and the motor are connected by bolts and washers.

[0010] In the embodiment of the utility model, the motor is fixed with the base through bolts.

[0011] In the embodiment of the utility model, the pump body is fixed with the base through bolts.

[0012] In the embodiment of the utility model, the impeller is connected with the motor shaft through screws, elastic washers, stop washers and keys.

[0013] In the embodiment of the utility model, the coaxial two-phase flow pump further comprises a mechanical seal, which is installed between the impeller and the pump cover.

[0014] In the embodiment of the utility model, the impeller adopts a semi-open structure.

[0015] The utility model discloses a coaxial two-phase flow pump, which has the following advantages compared with common technologies: the utility model adopts a coaxial structure, uses a precisely processed pump body inner wall to replace an existing wear plate, and uses a coaxial structure to replace an existing bearing part 18 (see Figure 1 )+motor structure. DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the existing product.

[0017] Figure 2 It is a whole structural schematic view of the utility model.

[0018] Figure 3 It is a structural schematic view of the precisely processed part in the utility model.

[0019] The following is the name corresponding to the mark in the utility model:

[0020] Pump body 1, impeller 2, pump cover 3, O ring 4, first bolt 5, mechanical seal 6, motor 7, second bolt 8, nut 9, base 10, third bolt 11, fourth bolt 12, key 13, screw 14, elastic washer 15, stop washer 16, wear plate 17, bearing part 18. DETAILED DESCRIPTION

[0021] The preferred embodiment of the utility model is shown below in combination with the drawings to specifically describe the technical scheme of the utility model.

[0022] Figure 2 It is a whole structural schematic view of the utility model. As Figure 2As shown, the utility model provides a kind of coaxial two-phase flow pump, the coaxial two-phase flow pump includes: pump body 1, impeller 2, pump cover 3, mechanical seal 6, motor 7, base 10;Two-phase flow pump impeller 2 and pump body 1 blade tip gap S1, impeller 2 and pump cover 3 blade tip gap S2;Pump cover 3 and pump body 1 are detachably fixedly connected together, pump cover 3 and motor 7 are detachably fixedly connected together, pump cover 3 is between pump body 1 and motor 7;Motor 7 is fixed on base 10;Pump body 1 is fixed on base 10;Impeller 2 is detachably fixed on the shaft of motor 7.

[0023] The inner wall of the pump body 1 of the utility model is provided with a finish machining part (A in the figure). Figure 2 The finish machining part is located at the impeller leading edge gap, and the machining precision is the same as that of the impeller leading edge. Figure 3 The finish machining part cooperates with the impeller leading edge gap to replace the cooperation between the wear plate and the impeller leading edge gap.

[0024] In the specific implementation process, the pump body 1 and the pump cover 3 are connected through the first bolt 5, the O-ring 4 is installed between the pump body 1 and the pump cover 3, the pump cover 3 and the motor 7 are connected through the second bolt 8 and the washer 9, the motor 7 and the base 10 are fixed through the third bolt 11, and the pump body 1 and the base 10 are fixed through the fourth bolt 12.

[0025] The coaxial two-phase flow pump further comprises a mechanical seal 6, which is installed between the impeller 2 and the pump cover 3.

[0026] As shown in the figure, Figure 2 After the structure of the two-phase flow pump is changed, the coaxial structure is used, the pump and the motor are completely centered, the blade tip gaps S1 and S2 are uniform, and both are 0.5-1.0 mm.

[0027] The two-phase flow pump of the utility model adopts the coaxial structure, and the inner wall of the pump body is machined instead of the existing wear plate.

[0028] The basic principles and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also be variously changed and improved, and these changes and improvements all fall within the scope of the claimed utility model, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A coaxial two-phase flow pump, characterized by: The coaxial two-phase flow pump comprises a pump body, an impeller, a pump cover, a mechanical seal, a motor and a base; the pump body and the impeller are coaxial, an inter-blade clearance S1 is arranged between the impeller and the pump body, and an inter-blade clearance S2 is arranged between the impeller and the pump cover; the pump cover and the pump body are detachably fixedly connected together, the pump cover and the motor are detachably fixedly connected together, and the pump cover is located between the pump body and the motor; the motor is fixed on the base; the pump body is fixed on the base; the impeller is detachably fixed on the shaft of the motor; and the inner wall of the pump body is provided with a finish.

2. The coaxial two-phase pump of claim 1, wherein: The ranges of S1 and S2 are both 0.5-1.0 mm.

3. The coaxial two-phase pump of claim 1, wherein: The pump body and the pump cover are connected through bolts.

4. The coaxial two-phase pump of claim 3, wherein: An O-ring is installed between the pump body and the pump cover.

5. The coaxial two-phase pump of claim 1, wherein: The pump cover and the motor are connected through bolts and washers.

6. The coaxial two-phase pump of claim 1, wherein: The motor and the base are fixed through bolts.

7. The coaxial two-phase pump of claim 1, wherein: The pump body and the base are fixed through bolts.

8. The coaxial two-phase pump of claim 1, wherein: The impeller and the shaft of the motor are connected through screws, elastic washers, stop washers and keys.

9. The coaxial two-phase pump of claim 1, wherein: The coaxial two-phase flow pump further comprises a mechanical seal, which is installed between the impeller and the pump cover.

10. The coaxial two-phase pump of claim 1, wherein: The impeller adopts a semi-open structure.

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