High-efficiency vertical multistage guide vane pump

Abstract

This utility model relates to the field of multistage guide vane pump technology, and more particularly to a high-efficiency vertical multistage guide vane pump used in the petrochemical industry. The pump housing is installed on a user foundation; the inlet and outlet sections are installed on the upper part of the housing; the support pipe is installed at the lower end of the inlet and outlet sections and located inside the housing; the guide vane is installed at the lower end of the support pipe; the suction section is installed at the lower end of the guide vane; the motor bracket is installed between the upper end of the inlet and outlet sections and the shaft; the bearing assembly is installed on the motor frame; the shaft is mounted on the pump via the bearing assembly; the impeller is installed at the bottom end of the shaft; a balancing mechanism is mounted on the shaft to balance the axial force generated by the impeller. The technical solution of this utility model improves the operational reliability of the pump under low NPSH conditions and can provide users with more efficient and energy-saving equipment.

Description

Technical Field

[0001] This utility model relates to the field of multistage guide pump technology, and in particular to a high-efficiency vertical multistage guide shell pump used in the petrochemical industry. Background Technology

[0002] The guide vane type hydraulic model is a spatial guide vane type, which mainly solves the problem of low head operation under the same flow rate, the pump specific speed is relatively large and the cavitation performance is poor; and in order to improve the energy-saving effect, it is necessary to develop a guide vane pump type with higher efficiency and reliability.

[0003] In view of the problems existing in the above-mentioned existing technologies, it is necessary to research and design a new type of high-efficiency vertical multistage guide shell pump to overcome the problems existing in the existing technologies. Summary of the Invention

[0004] To address the technical challenges of achieving stronger cavitation resistance, higher efficiency, and greater reliability in existing technologies, this invention provides a high-efficiency vertical multi-stage guide vane pump. This invention primarily utilizes the pump's integrated multi-stage impeller structure and varying insertion depth to solve the low cavitation problem. By adding water-retaining ribs to the guide vane, frictional losses from the impeller cover disc are reduced, enabling efficient delivery of the pump's internal medium.

[0005] The technical means adopted in this utility model are as follows:

[0006] A high-efficiency vertical multistage guide vane pump includes: a motor bracket, inlet and outlet sections, a cartridge bag, a support pipe, a guide vane, a suction section, an impeller, a shaft, bearing components, and a balancing mechanism;

[0007] Furthermore, the tubular bag is installed on the user's base;

[0008] Furthermore, the inlet and outlet sections are installed at the top of the tube bag;

[0009] Furthermore, the support pipe is installed at the lower end of the inlet and outlet section and is located inside the tube bag;

[0010] Furthermore, the flow guide shell is installed at the lower end of the support tube;

[0011] Furthermore, the intake section is installed at the lower end of the guide shell;

[0012] Furthermore, the motor bracket is installed between the upper end of the inlet / outlet section and the shaft;

[0013] Furthermore, the bearing components are mounted on the motor frame;

[0014] Furthermore, the shaft is mounted on the pump via bearing components;

[0015] Furthermore, the impeller is mounted at the bottom end of the shaft;

[0016] Furthermore, a balancing mechanism is mounted on the shaft to balance the axial force generated by the impeller.

[0017] Furthermore, the balancing mechanism includes: a balancing drum and a balancing sleeve;

[0018] Furthermore, the balance sleeve is installed between the upper end of the inlet / outlet section and the shaft;

[0019] Furthermore, the balancing drum is mounted on the shaft.

[0020] Furthermore, sliding bearings are installed between the support pipe and the inlet / outlet section.

[0021] Furthermore, bushings are installed inside the suction section and the guide shell to provide support rigidity for the shaft and ensure smooth pump operation.

[0022] Furthermore, the guide shell is equipped with water-blocking ribs, which effectively reduce the rotational speed of the fluid in the gap, reduce the friction loss of the disc inside the pump, improve the pump's energy efficiency, and thus improve the pump efficiency to a certain extent.

[0023] Furthermore, in the high-efficiency vertical multistage guide shell pump, apart from the sliding bearings being radially limited by a stop fit and axially limited by clamping between the inlet / outlet section and the support pipe, all other parts are connected by bolts.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The high-efficiency vertical multistage guide vane pump provided by this utility model has strong anti-cavitation ability, high operational reliability and high efficiency.

[0026] 2. The high-efficiency vertical multistage guide shell pump provided by this utility model has an adjustable submerged length that can be adjusted by the length of the support pipe. Therefore, the pump has strong anti-cavitation ability and is suitable for working conditions with different cavitation requirements.

[0027] 3. The high-efficiency vertical multistage guide shell pump provided by this utility model has a reasonable arrangement of the sliding bearing span inside the pump, high pump rotor support rigidity, and high pump operation reliability.

[0028] 4. The high-efficiency vertical multistage guide vane pump provided by this utility model has a guide vane in the form of a spatial guide vane, and there are water-blocking ribs on the guide vane to reduce the friction loss of the impeller cover plate disc, which can efficiently transport the medium inside the pump.

[0029] In summary, the technical solution of this utility model solves the problems of poor cavitation performance and low efficiency of the existing guide shell pump. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] In the diagram: 1. Motor bracket; 2. Inlet / outlet section; 3. Bag; 4. Support pipe; 5. Guide shell; 6. Suction section; 7. Impeller; 8. Bushing; 9. Shaft; 10. Sliding bearing; 11. Balance drum; 12. Balance sleeve; 13. Bearing components. Detailed Implementation

[0033] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0038] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0040] like Figure 1 As shown, this utility model provides a high-efficiency vertical multistage guide shell pump, comprising: a motor bracket 1, inlet and outlet sections 2, a cylindrical bag 3, a support pipe 4, a guide shell 5, a suction section 6, an impeller 7, a shaft 9, a bearing assembly 13, and a balancing mechanism; the cylindrical bag 3 is installed on a user foundation; the inlet and outlet sections 2 are installed on the upper part of the cylindrical bag 3; the support pipe 4 is installed at the lower end of the inlet and outlet sections 2 and located inside the cylindrical bag 3; the guide shell 5 is installed at the lower end of the support pipe 4; the suction section 6 is installed at the lower end of the guide shell 5; the motor bracket 1 is installed between the upper end of the inlet and outlet sections 2 and the shaft 9; the bearing assembly 13 is installed on the motor bracket 1; the shaft 9 is mounted on the pump via the bearing assembly 13; the impeller 7 is installed at the bottom end of the shaft 9; a balancing mechanism is assembled on the shaft 9 to balance the axial force generated by the impeller 7.

[0041] The balancing mechanism includes a balancing drum 11 and a balancing sleeve 12; the balancing sleeve 12 is installed between the upper end of the inlet / outlet section 2 and the shaft 9; the balancing drum 11 is installed on the shaft 11.

[0042] A sliding bearing 10 is installed between the support pipe 4 and the inlet / outlet section 2.

[0043] The suction section 6 and the guide shell 5 are equipped with bushings 8 to provide support rigidity for the shaft 9 and ensure smooth pump operation.

[0044] The guide shell 5 is equipped with water-blocking ribs, which effectively reduce the rotation speed of the fluid in the gap, reduce the friction loss of the disc inside the pump, improve the pump's energy efficiency, and improve the pump efficiency to a certain extent.

[0045] In the high-efficiency vertical multistage guide shell pump, except for the sliding bearing 10 which is radially limited by a stop fit and axially limited by clamping between the inlet / outlet section 2 and the support pipe 4, all other parts are connected by bolts.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-efficiency vertical multistage guide vane pump, characterized in that: The high-efficiency vertical multistage guide shell pump includes: motor bracket (1), inlet and outlet sections (2), cylinder bag (3), support pipe (4), guide shell (5), suction section (6), impeller (7), shaft (9), bearing components (13) and balancing mechanism; The tube bag (3) is installed on the user's foundation; The inlet / outlet section (2) is installed on the upper part of the tubular bag (3); The support tube (4) is installed at the lower end of the inlet / outlet section (2) and is located inside the tube bag (3); The flow guide shell (5) is installed at the lower end of the support tube (4); The suction section (6) is installed at the lower end of the guide shell (5); The motor bracket (1) is installed between the upper end of the inlet / outlet section (2) and the shaft (9); The bearing component (13) is mounted on the motor bracket (1); The shaft (9) is mounted on the pump via a bearing component (13); The impeller (7) is mounted at the bottom end of the shaft (9); The shaft (9) is equipped with a balancing mechanism to balance the axial force generated by the impeller (7).

2. The high-efficiency vertical multistage guide vane pump according to claim 1, characterized in that: The balancing mechanism includes: a balancing drum (11) and a balancing sleeve (12); The balance sleeve (12) is installed between the upper end of the inlet / outlet section (2) and the shaft (9); The balance drum (11) is mounted on the shaft (9).

3. The high-efficiency vertical multistage guide vane pump according to claim 1, characterized in that: A sliding bearing (10) is installed between the support pipe (4) and the inlet / outlet section (2).

4. The high-efficiency vertical multistage guide vane pump according to claim 1, characterized in that: The suction section (6) and the guide shell (5) are equipped with bushings (8) to provide support rigidity for the shaft (9) and ensure the smooth operation of the pump.

5. The high-efficiency vertical multistage guide vane pump according to claim 1, characterized in that: The guide shell (5) is provided with water-blocking ribs, which effectively reduces the rotation speed of the fluid in the gap, reduces the friction loss of the disc inside the pump, improves the energy efficiency of the pump, and improves the pump efficiency to a certain extent.

6. The high-efficiency vertical multistage guide vane pump according to any one of claims 1 to 5, characterized in that: Except for the sliding bearing (10), which is radially limited by a stop fit and axially limited by clamping between the inlet / outlet section (2) and the support pipe (4), all other parts of the high-efficiency vertical multistage guide shell pump are connected by bolts.

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