Suitable for high-flow vertical single-stage mixed-flow cooling water circulating pump

Abstract

This utility model relates to the field of circulating pump technology, and more particularly to a large-flow vertical single-stage mixed-flow cooling water circulating pump. In this utility model, the motor frame and pump head are jointly fixed on a base. The upper end of the pump head consists of an outlet section, a seal, a splash guard, bearing components, a reverse-rotation bracket, and an anti-reverse-rotation device. The lower end consists of a shaft system and hydraulic components. The shaft of the shaft system passes through the outlet section from bottom to top and connects to the motor. A sealing cavity is provided at the top of the outlet section, and a sealing component is assembled inside the sealing cavity. A splash guard is provided outside the sealing component, encapsulating the sealing component within the sealing cavity. A bearing component is also provided at the top of the outlet section for shaft support. A reverse-rotation bracket is also provided at the top of the outlet section, and an anti-reverse-rotation device is installed on the reverse-rotation bracket. The technical solution of this utility model solves the problems in the prior art where, with the increase of head, the bearing load increases, leading to high bearing temperature, increased seal leakage, reduced pump lifespan, and increased maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of circulating pump technology, and in particular to a large-flow vertical single-stage mixed-flow cooling water circulating pump. Background Technology

[0002] Currently, in the petrochemical, oil refinery, and nuclear power industries, as project capacity and output increase, the demand for cooling water also increases, leading to a trend of increasingly higher heads for cooling water circulating pumps. This increase in head also brings problems such as increased bearing load, resulting in higher bearing temperatures and increased seal leakage, affecting pump lifespan and increasing maintenance and management requirements.

[0003] In view of the problems existing in the above-mentioned prior art, it is necessary to study and design a new type of vertical single-stage mixed-flow cooling water circulation pump suitable for large flow rate, so as to overcome the problems existing in the prior art. Summary of the Invention

[0004] In response to the technical problems mentioned above, such as increased bearing load, high bearing temperature, increased seal leakage, reduced pump lifespan, and increased maintenance costs caused by the increase in head, this paper provides a high-flow vertical single-stage mixed-flow cooling water circulation pump.

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

[0006] A type of vertical single-stage mixed-flow cooling water circulating pump suitable for large flow rates, including a motor frame and pump head;

[0007] Furthermore, the motor frame and pump head are fixedly mounted on the base. The weight of the motor frame and the motor on it is borne by the foundation under the base, which provides a higher load capacity and the weight of the motor does not affect the pump head. After the motor frame is removed, the pump head can be removed from the base as a whole, shortening maintenance time.

[0008] Furthermore, the upper end of the pump head consists of an outlet section, a seal, a splash guard, bearing components, a reverse support, and an anti-reverse device, while the lower end consists of a shaft system and hydraulic components; the shaft of the shaft system passes through the outlet section from bottom to top and is connected to the motor.

[0009] Furthermore, a sealing cavity is provided at the top of the outlet section, and the outlet section and the sealing cavity are integral structures. A seal is assembled inside the sealing cavity. A splash guard is provided outside the seal to encapsulate the seal in the sealing cavity. The splash guard collects the leaked medium to prevent the medium from splashing everywhere.

[0010] Furthermore, a bearing component is also provided at the top of the outlet section for shaft support;

[0011] Furthermore, a reverse support is installed at the top of the outlet section, and an anti-reverse device is installed on the reverse support to prevent the pump from reversing when starting, running, or stopping, which would affect the operation of the entire system. This ensures that the pump will not reverse under any operating conditions.

[0012] Furthermore, the hydraulic components are located at the lower end of the shaft system.

[0013] Furthermore, the sealing cavity is connected to the pressure relief pipeline, and the flow rate of the sealing flush is adjusted by the valve on the pressure relief pipeline to reduce the pressure in the sealing cavity and reduce the leakage of the seal.

[0014] Furthermore, the splash guard is connected to the leakage collection pipeline to guide the liquid back into the pump pit.

[0015] Furthermore, one end of the bearing component is connected to the pump outlet via a cooling water inlet pipe, and the other end is connected to the pit via a cooling water outlet pipe, forming a self-cooling return flow of the bearing. Cooling water is introduced into the bearing component from the pump outlet and then flows back to the pump pit from the bearing component. The entire cooling process uses its own medium and does not require external cooling water supply, ensuring that more heat is removed when the bearing load increases, thus improving the stability of bearing operation.

[0016] Furthermore, the bearing components include: oil seals, deep groove ball bearings, spherical roller bearings, cooling water pipes, and bearing housings;

[0017] Furthermore, the bearing assembly employs a combination of spherical roller bearings and deep groove ball bearings. The spherical roller bearings provide a radial force, allowing the rotor to automatically adjust towards the center while bearing axial forces. The deep groove ball bearings provide radial force during rotor adjustment, preventing the rotor from tipping over and improving the overall stability of the rotor.

[0018] Furthermore, deep groove ball bearings and spherical roller bearings are installed inside the bearing housing;

[0019] Furthermore, a cooling water pipe is installed on the outer wall of the bearing housing. The two ends of the cooling water pipe are connected to the cooling water inlet pipe and the cooling water outlet pipe, respectively, for cooling the lubricating oil inside the bearing housing.

[0020] Furthermore, the bearing housing and bearing cover are fixed together with fasteners;

[0021] Furthermore, the oil seal is located inside the bearing cap to prevent lubricating oil from splashing.

[0022] Furthermore, the spherical roller bearing and the deep groove ball bearing are respectively installed on both sides of the bearing housing;

[0023] Furthermore, an oil baffle is provided on the upper part of the inner ring of the deep groove ball bearing, and the oil baffle and the deep groove ball bearing are fixed by a lock nut.

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

[0025] 1. The utility model provides a vertical single-stage mixed-flow cooling water circulation pump suitable for large flow rates. The bearing adopts a combination of spherical roller bearings and deep groove ball bearings to achieve automatic rotor self-alignment and improve the stability of pump operation.

[0026] 2. The utility model provides a large-flow vertical single-stage mixed-flow cooling water circulation pump with an anti-reverse device installed on the reverse bracket, which can prevent the pump from reversing during startup, operation, and shutdown.

[0027] 3. The utility model provides a large-flow vertical single-stage mixed-flow cooling water circulation pump. The bearing is cooled by its own medium, eliminating the need for external cooling water, reducing additional engineering costs, and improving reliability under increased load conditions.

[0028] 4. The utility model provides a large-flow vertical single-stage mixed-flow cooling water circulation pump with an external splash guard installed on the seal. The pressure of the sealing cavity is controlled by a valve on the pressure relief pipeline, which indirectly controls the amount of seal leakage. The splash guard collects the leaked medium and leads it back to the pit, thus avoiding the impact of medium leakage on the environment.

[0029] 5. The utility model provides a large-flow vertical single-stage mixed-flow cooling water circulation pump. The motor is mounted on the base through a motor frame, and its weight acts on the foundation, which will not affect the pump head. Larger specifications / weight motors can be used.

[0030] In summary, the technical solution of this utility model solves the problems in the prior art where the bearing load increases with the increase of the pump head, resulting in high bearing temperature, increased seal leakage, reduced pump lifespan, and increased maintenance and management costs. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the bearing component structure of this utility model.

[0034] In the diagram: 1. Motor frame; 2. Anti-reverse device; 3. Reverse bracket; 4. Bearing components; 5. Seal; 6. Splash shield; 7. Outlet section; 8. Base; 9. Shaft system; 10. Hydraulic components; 11. Cooling water inlet pipe; 12. Cooling water outlet pipe; 13. Pressure relief pipe; 14. Leakage collection pipe; 15. Oil seal; 16. 17. Deep groove ball bearing; 18. Bearing housing; 19. Spherical roller bearing; 20. Locking nut; 21. Bearing cap; 22. Cooling water pipe; 23. Bearing housing. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] like Figure 1 As shown, this utility model provides a high-flow vertical single-stage mixed-flow cooling water circulating pump, comprising a motor frame 1 and a pump head; the motor frame 1 and the pump head are jointly fixed on the base 8, and after the motor frame 1 is removed, the pump head can be completely removed from the base 8, shortening maintenance time.

[0043] like Figure 1As shown, the upper end of the pump head consists of an outlet section 7, a seal 5, a splash guard 6, a bearing component 4, a reverse support 3, and an anti-reverse device 2, while the lower end consists of a shaft system 9 and a hydraulic component 10. The shaft of the shaft system 9 passes through the outlet section 7 from bottom to top and is connected to the motor. A sealing cavity is provided at the top of the outlet section 7, and a seal 5 is installed inside the sealing cavity. A splash guard 6 is provided outside the seal 5 to encapsulate the seal 5 in the sealing cavity. A bearing component 4 is also provided at the top of the outlet section 7 for shaft support. A reverse support 3 is also provided at the top of the outlet section 7, and an anti-reverse device 2 is provided on the reverse support 3 to prevent the pump from reversing during pump start-up, operation, and shutdown, thus affecting the operation of the entire system. The hydraulic component 10 is located at the lower end of the shaft system 9.

[0044] like Figure 1 As shown, the sealing cavity is connected to the pressure relief pipeline 13. The flow rate of the sealing flush is adjusted by the valve on the pressure relief pipeline 13 to control the amount of sealing leakage.

[0045] like Figure 1 As shown, the splash guard 6 is connected to the leakage collection pipe 14 to guide the liquid back into the pump pit.

[0046] like Figure 1 As shown, one end of the bearing component 4 is connected to the pump outlet through the cooling water inlet pipe 11, and the other end is connected to the pit through the cooling water outlet pipe 12, forming a bearing self-cooling return flow. The cooling water is introduced into the bearing component 4 from the pump outlet and then flows back to the pump pit from the bearing component 4. The entire cooling process uses its own medium and does not require external cooling water supply.

[0047] like Figure 2 As shown, bearing component 4 includes: oil seal 15, deep groove ball bearing 17, spherical roller bearing 19, cooling water pipe 22, and bearing housing 23; deep groove ball bearing 17 and spherical roller bearing 19 are installed in the inner cavity of bearing housing 23; cooling water pipe 22 is installed on the outer wall of bearing housing 23, and the two ends of cooling water pipe 22 are connected to cooling water inlet pipe 11 and cooling water outlet pipe 12 respectively, for cooling the lubricating oil in bearing housing; bearing housing 23 is fixed to bearing cover 21 with fasteners; oil seal 15 is located inside bearing cover 21 to prevent lubricating oil from splashing.

[0048] like Figure 2 As shown, the spherical roller bearing 19 and the deep groove ball bearing 17 are respectively installed on both sides of the bearing housing 18; an oil baffle 16 is provided on the upper part of the inner ring of the deep groove ball bearing 17, and the oil baffle 16 and the deep groove ball bearing 17 are fixed by the lock nut 20.

[0049] 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 vertical single-stage mixed-flow cooling water circulating pump suitable for large flow rates, comprising a motor frame (1) and a pump head; characterized in that: The motor frame (1) and the pump head are fixedly mounted on the base (8). After the motor frame (1) is removed, the pump head can be removed from the base (8) as a whole, which shortens the maintenance time.

2. The vertical single-stage mixed-flow cooling water circulating pump according to claim 1, characterized in that: The upper end of the pump head consists of an outlet section (7), a seal (5), a splash guard (6), a bearing component (4), a reverse support (3), and an anti-reverse device (2), while the lower end consists of a shaft system (9) and a hydraulic component (10). The shaft of the shaft system (9) passes through the outlet section (7) from bottom to top and is connected to the motor. The top of the outlet section (7) is provided with a sealing cavity, and a seal (5) is assembled inside the sealing cavity; a splash shield (6) is provided outside the seal (5) to encapsulate the seal (5) in the sealing cavity; The top of the outlet section (7) is also provided with a bearing component (4) for shaft support; The top of the outlet section (7) is also provided with a reverse support (3), and an anti-reverse device (2) is provided on the reverse support (3) to prevent the pump from reversing when the pump starts, runs, or stops, thus affecting the operation of the entire system. The hydraulic component (10) is located at the lower end of the shaft system (9).

3. The vertical single-stage mixed-flow cooling water circulating pump according to claim 2, characterized in that: The sealing cavity is connected to the pressure relief pipeline (13), and the sealing flushing flow rate is adjusted by the valve on the pressure relief pipeline (13) to control the sealing leakage.

4. The vertical single-stage mixed-flow cooling water circulating pump according to claim 2, characterized in that: The splash guard (6) is connected to the leakage collection pipe (14) to draw the liquid back into the pump pit.

5. The vertical single-stage mixed-flow cooling water circulating pump according to claim 2, characterized in that: One end of the bearing component (4) is connected to the pump outlet through the cooling water inlet pipe (11), and the other end is connected to the pit through the cooling water outlet pipe (12), forming a bearing self-cooling return flow. The cooling water is introduced into the bearing component (4) from the pump outlet and then flows back to the pump pit from the bearing component (4). The entire cooling uses its own medium and does not require external cooling water supply.

6. The vertical single-stage mixed-flow cooling water circulating pump according to claim 2, characterized in that: The bearing component (4) includes: an oil seal (15), a deep groove ball bearing (17), a spherical roller bearing (19), a cooling water pipe (22), and a bearing housing (23). The deep groove ball bearing (17) and spherical roller bearing (19) are installed in the inner cavity of the bearing housing (23); The outer wall of the bearing housing (23) is equipped with a cooling water pipe (22), and the two ends of the cooling water pipe (22) are connected to the cooling water inlet pipe (11) and the cooling water outlet pipe (12) respectively, for cooling the lubricating oil in the bearing housing; The bearing housing (23) and bearing cap (21) are fixed together by fasteners; The oil seal (15) is located inside the bearing cap (21) to prevent lubricating oil from splashing.

7. The vertical single-stage mixed-flow cooling water circulating pump according to claim 6, characterized in that: The spherical roller bearing (19) and the deep groove ball bearing (17) are respectively installed on both sides of the bearing housing (18); The inner ring of the deep groove ball bearing (17) is provided with an oil baffle (16), and the oil baffle (16) and the deep groove ball bearing (17) are fixed by a locking nut (20).

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