Adjustable sealing degree centrifugal pump mechanical seal device

Abstract

The utility model relates to centrifugal pump mechanical seal technical field, and disclose a kind of adjustable sealing degree's centrifugal pump mechanical seal device, including centrifugal pump, the one end of centrifugal pump is fixedly installed with first connecting disc, and the front end of first connecting disc is fixedly installed with seal shell, the top of seal shell is embedded with installation platform, and the top of installation platform is provided with adjusting mechanism;The adjusting mechanism includes servo motor, the top of installation platform is embedded in servo motor, and the power output end of servo motor is fixedly installed with driving rod.The utility model is through fixed ring, fixed plate, rotating plate and rotating ring, and cooperate servo motor, driving rod and rotating rod, by adjusting the area of fixed plate and rotating plate overlap, so that the reserved groove between the two is communicated, can be adjusted from completely closed to flow, according to the requirement of sealing degree adjustment, improve the applicability and comprehensiveness of entire device.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump mechanical seal technology, specifically a centrifugal pump mechanical seal device with adjustable sealing degree. Background Technology

[0002] A centrifugal pump is a machine that uses the centrifugal force generated by the high-speed rotation of an impeller to transport and pressurize liquids. It is one of the most widely used fluid transport devices in the industrial field. When the impeller rotates, the liquid is thrown to the edge by the centrifugal force, and a negative pressure is formed in the center of the impeller, thereby drawing in new liquid and continuously discharging it.

[0003] Patent specification CN222633492U discloses a mechanical seal device for a multi-stage centrifugal pump. This device uses a fixed spring seat and a first limiting plate fixedly installed on the outside of the central shaft. A helical spring is inserted into the central shaft, with one end fitted onto the outside of the first limiting plate and abutting against the fixed spring seat. Then, a movable spring seat and a second limiting plate are inserted onto the outside of the central shaft, allowing the other end of the helical spring to be fitted onto the outside of the second limiting plate and abutting against one side of the movable spring seat. This spring installation method is quick and convenient during use, and it provides appropriate clamping force when the dynamic seal ring wears, achieving automatic compensation of the axial friction surface and ensuring the sealing device's effectiveness.

[0004] However, in implementing the relevant technology, the mechanical seal device for a multi-stage centrifugal pump designed above has the following problems: Although the existing technology can achieve a sealing effect during the flow of the centrifugal pump through the cooperation of components such as helical springs, the sealing degree cannot be adjusted according to the needs of use in actual use, resulting in a relatively limited overall application. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Given that the existing technology cannot adjust the sealing degree according to the needs of use, resulting in a relatively limited overall application.

[0007] To achieve the above objectives, this utility model provides the following technical solution: An adjustable sealing centrifugal pump mechanical seal device includes a centrifugal pump, a first connecting plate is fixedly installed at one end of the centrifugal pump, and a sealing shell is fixedly installed at the front end of the first connecting plate. An installation platform is embedded at the top of the sealing shell, and an adjustment mechanism is provided at the top of the installation platform. The adjustment mechanism includes a servo motor, which is embedded in the top of the mounting platform. A drive rod is fixedly installed at the power output end of the servo motor. A fixing ring is fixedly installed on one side of the inside of the sealing shell, and a fixing plate is fixedly installed on the inner wall of the fixing ring. A drive gear is fixedly installed at the bottom end of the drive rod, and a driven gear is rotatably connected to the outer wall of the drive gear. A rotating rod extends through the inside of the driven gear, and a rotating plate is fixedly installed at one end of the rotating rod. A rotating ring is fixedly installed on the outer wall of the rotating plate.

[0008] As a further improvement of this utility model: the rotating rod extends through the interior of the fixed plate, and the rotating rod is fixedly connected to the rotating plate.

[0009] As a further improvement of this utility model: the fixed plate and the rotating plate are closely fitted together, and a sliding structure is formed between the rotating plate and the fixed plate.

[0010] As a further improvement of this utility model: the rotating ring and the sealing shell form a rotating structure, and the rotating ring and the fixed ring are tightly fitted together.

[0011] As a further embodiment of this utility model: a filter cylinder is fixedly installed at one end of the sealing shell, and a second connecting plate is fixedly installed at the front end of the filter cylinder.

[0012] As a further improvement of this utility model: a fixing rod is fixedly installed at the front end of the rotating plate, and a filtering mechanism is provided on one side of the fixing rod.

[0013] As a further embodiment of this utility model: the filtering mechanism includes a fine filter screen, which is embedded in the inner wall of the sealed shell, and a coarse filter screen is fixedly installed inside the filter cylinder.

[0014] As a further embodiment of this utility model: a movable plate is fixedly installed at one end of the fixed rod that protrudes from the fine filter screen, and a scraper is embedded in the movable plate facing the outer wall of the fine filter screen.

[0015] As a further improvement of this utility model: a connecting ring extends from the inside of the filter cylinder, and a flow hole is provided on the inner wall of the second connecting plate.

[0016] As a further improvement of this utility model: the connecting ring is threadedly connected to the filter cylinder, and the filter cylinder is in communication with the sealing shell.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a fixed ring, a fixed plate, a rotating plate, and a rotating ring, along with a servo motor, a drive rod, and a rotating rod. By adjusting the overlapping area of ​​the fixed plate and the rotating plate, the reserved groove between them can be connected, allowing adjustment from completely sealed to flowable. Adjustment can be made according to the sealing requirements, improving the applicability and comprehensiveness of the entire device.

[0018] 2. This utility model, through the combination of a fine filter screen, a coarse filter screen, a moving plate, and a scraper, can achieve double-layer filtration of the medium to improve the filtration effect. In addition, the scraper can periodically scrape and clean the fine filter screen when the medium is not flowing, avoiding long-term clogging. At the same time, the connecting ring facilitates the disassembly and assembly of the second connecting plate and the filter cylinder, so as to clean the internal impurities. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a centrifugal pump mechanical seal device with adjustable sealing performance. Figure 2 A schematic diagram of the internal structure of the sealing housing of a centrifugal pump mechanical seal device with adjustable sealing degree; Figure 3 A schematic diagram of the fixed plate structure of a centrifugal pump mechanical seal device with adjustable sealing degree; Figure 4 A schematic diagram of a fine filter screen structure for an adjustable sealing centrifugal pump mechanical seal device; Figure 5 A schematic diagram of the coarse filter screen structure of a centrifugal pump mechanical seal device with adjustable sealing degree; In the diagram: 1. Centrifugal pump; 2. First connecting plate; 3. Sealing shell; 4. Mounting platform; 5. Adjustment mechanism; 501. Servo motor; 502. Drive rod; 503. Fixing ring; 504. Fixing plate; 505. Drive gear; 506. Driven gear; 507. Rotating rod; 508. Rotating plate; 509. Rotating ring; 6. Filter cartridge; 7. Second connecting plate; 8. Fixing rod; 9. Filtering mechanism; 901. Fine filter screen; 902. Coarse filter screen; 903. Moving plate; 904. Scraper; 905. Connecting ring; 906. Flow hole. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0023] Example 1: Please see Figures 1-4 This is the first embodiment of the present invention. This embodiment provides a centrifugal pump mechanical seal device with adjustable sealing degree, including a centrifugal pump 1, a first connecting plate 2 fixedly installed at one end of the centrifugal pump 1, a sealing shell 3 fixedly installed at the front end of the first connecting plate 2, an installation platform 4 embedded at the top of the sealing shell 3, and an adjustment mechanism 5 provided at the top of the installation platform 4. The adjustment mechanism 5 includes a servo motor 501, which is embedded in the top of the mounting platform 4. A drive rod 502 is fixedly installed at the power output end of the servo motor 501. A fixing ring 503 is fixedly installed on one side of the inside of the sealing shell 3. A fixing plate 504 is fixedly installed on the inner wall of the fixing ring 503. A drive gear 505 is fixedly installed at the bottom end of the drive rod 502. A driven gear 506 is rotatably connected to the outer wall of the drive gear 505. A rotating rod 507 extends through the inside of the driven gear 506. A rotating plate 508 is fixedly installed at one end of the rotating rod 507. A rotating ring 509 is fixedly installed on the outer wall of the rotating plate 508.

[0024] Specifically, the rotating rod 507 extends into the interior of the fixed plate 504, and the rotating rod 507 is fixedly connected to the rotating plate 508.

[0025] Furthermore, through the meshing of the driving gear 505 and the driven gear 506, the rotational force of the drive rod 502 can be transmitted, allowing the rotating rod 507 to drive the rotating plate 508 to rotate stably under the limitation of the fixed plate 504.

[0026] Specifically, the fixed plate 504 and the rotating plate 508 are closely fitted together, and a sliding structure is formed between the rotating plate 508 and the fixed plate 504.

[0027] Furthermore, the fixed plate 504 and the rotating plate 508 are tightly fitted together and overlap each other during the rotation process, thereby adjusting the space of the reserved groove and allowing the medium to flow in a regulated manner, so as to control the sealing effect according to the actual situation.

[0028] Specifically, the rotating ring 509 and the sealing shell 3 form a rotating structure, and the rotating ring 509 and the fixed ring 503 are tightly fitted together.

[0029] Furthermore, the rotating ring 509 and the fixed ring 503 fit tightly together, and the space of the reserved groove can be controlled by rotation adjustment, thereby adjusting according to the degree of sealing and further improving applicability.

[0030] In use, the sealing shell 3 is first fixed to the centrifugal pump 1 using the first connecting plate 2 and bolts. The mounting platform 4 is used to fix and support the servo motor 501. The servo motor 501 works to make the drive rod 502 rotate. In conjunction with the drive gear 505 and the driven gear 506, the rotating rod 507 drives the rotating plate 508 and the rotating ring 509 to rotate. The fixed ring 503 and the fixed plate 504 can keep the rotation of the rotating rod 507 stable. At the same time, the space of the reserved groove can be adjusted by rotating to make it easy to adjust the sealing degree according to the actual situation and improve the applicability.

[0031] In summary, under normal circumstances, the fixed ring 503 and the rotating ring 509 are in contact with each other, and the fixed plate 504 and the rotating plate 508 are misaligned, which can achieve a complete sealing effect. Under the adjustment of the servo motor 501, the rotating plate 508 and the rotating ring 509 can rotate according to the rotating rod 507, thereby adjusting the position between the fixed plate 504 and the rotating plate 508 to make the reserved grooves communicate. The servo motor 501 can be adjusted according to the required sealing degree, so that the entire sealing device can be easily adjusted, improving the overall applicability and comprehensiveness.

[0032] Example 2: Please see Figures 3-5 This is the second embodiment of the present utility model.

[0033] Specifically, a filter cylinder 6 is fixedly installed at one end of the sealing shell 3, and a second connecting plate 7 is fixedly installed at the front end of the filter cylinder 6.

[0034] Furthermore, the second connecting plate 7 is connected to the conveying equipment or pipeline, so that the sealing device can play a connecting role between the centrifugal pump 1 and the pipeline or other equipment.

[0035] Specifically, a fixing rod 8 is fixedly installed at the front end of the rotating plate 508, and a filter mechanism 9 is provided on one side of the fixing rod 8.

[0036] Furthermore, the fixed rod 8 can rotate along with the rotating plate 508 and drive the filter mechanism 9.

[0037] Specifically, the filtration mechanism 9 includes a fine filter screen 901, which is embedded in the inner wall of the sealing shell 3, and a coarse filter screen 902 is fixedly installed inside the filter cylinder 6.

[0038] Furthermore, by setting up a double-layer filtration system with a fine filter screen 901 and a coarse filter screen 902, the filtration effect on impurities in the medium can be improved.

[0039] Specifically, a movable plate 903 is fixedly installed at one end of the fixed rod 8 that protrudes from the fine filter screen 901, and a scraper 904 is embedded in the movable plate 903 facing the outer wall of the fine filter screen 901.

[0040] Furthermore, when it is necessary to clean the fine filter screen 901, in the absence of media flow, the servo motor 501 provides power and drives the rotating rod 507 to rotate the fixed rod 8, thereby causing the scraper 904 to rotate in contact with the fine filter screen 901 and scrape off the adsorbed impurities.

[0041] Specifically, a connecting ring 905 extends from the inside of the filter cartridge 6, and a flow hole 906 is provided on the inner wall of the second connecting disc 7.

[0042] Furthermore, the connecting ring 905 is integrated with the second connecting disc 7. The connecting ring 905 facilitates the disassembly and assembly of the filter cartridge 6 and the second connecting disc 7, thereby making it convenient to clean the scraped impurities in a unified manner.

[0043] Specifically, the connecting ring 905 is threadedly connected to the filter cylinder 6, and the filter cylinder 6 is connected to the sealing shell 3.

[0044] Furthermore, the threaded connection facilitates the assembly and disassembly of the connecting ring 905 and the filter cartridge 6, improving the convenience of later maintenance.

[0045] In use, when cleaning is required, with the system closed and the medium not flowing, the servo motor 501 provides power, which drives the rotating rod 507 to rotate the fixed rod 8 through transmission. This causes the moving plate 903 to drive the scraper 904 to adhere to the fine filter screen 901 and scrape off adsorbed dust, etc. The connecting ring 905 facilitates the disassembly and assembly of the second connecting plate 7, thereby cleaning the scraped dust and the coarse filter screen 902. The flow hole 906 narrows the space entering the filter cylinder 6, which allows the scraped dust to fall off and prevents backflow.

[0046] In summary, the dual-layer filtration of fine filter screen 901 and coarse filter screen 902 can improve the filtration effect on impurities in the medium. In addition, the fixed rod 8 can rotate under the drive of the rotating rod 507, so that the moving plate 903 drives the scraper 904 to scrape off the impurities adsorbed by the fine filter screen 901. Regular cleaning can be performed to avoid clogging caused by not cleaning for a long time.

[0047] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0048] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0049] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A centrifugal pump mechanical seal device with adjustable sealing degree, comprising: Centrifugal pump (1), characterized in that: a first connecting plate (2) is fixedly installed at one end of the centrifugal pump (1), and a sealing shell (3) is fixedly installed at the front end of the first connecting plate (2), an installation platform (4) is embedded at the top of the sealing shell (3), and an adjustment mechanism (5) is provided at the top of the installation platform (4); The adjustment mechanism (5) includes a servo motor (501), which is embedded in the top of the mounting platform (4). A drive rod (502) is fixedly installed at the power output end of the servo motor (501). A fixing ring (503) is fixedly installed on one side of the inner side of the sealing shell (3). A fixing plate (504) is fixedly installed on the inner wall of the fixing ring (503). A drive gear (505) is fixedly installed at the bottom end of the drive rod (502). A driven gear (506) is rotatably connected to the outer wall of the drive gear (505). A rotating rod (507) extends through the inside of the driven gear (506). A rotating plate (508) is fixedly installed at one end of the rotating rod (507). A rotating ring (509) is fixedly installed on the outer wall of the rotating plate (508).

2. The centrifugal pump mechanical seal device with adjustable sealing degree according to claim 1, characterized in that: The rotating rod (507) extends through the interior of the fixed plate (504), and the rotating rod (507) is fixedly connected to the rotating plate (508).

3. The centrifugal pump mechanical seal device with adjustable sealing degree according to claim 1, characterized in that: The fixed plate (504) and the rotating plate (508) are closely fitted together, and a sliding structure is formed between the rotating plate (508) and the fixed plate (504).

4. The centrifugal pump mechanical seal device with adjustable sealing degree according to claim 1, characterized in that: The rotating ring (509) and the sealing shell (3) form a rotating structure, and the rotating ring (509) and the fixed ring (503) are tightly fitted together.

5. The centrifugal pump mechanical seal device with adjustable sealing degree according to claim 1, characterized in that: A filter cylinder (6) is fixedly installed at one end of the sealing shell (3), and a second connecting plate (7) is fixedly installed at the front end of the filter cylinder (6).

6. The centrifugal pump mechanical seal device with adjustable sealing degree according to claim 1, characterized in that: A fixing rod (8) is fixedly installed at the front end of the rotating plate (508), and a filter mechanism (9) is provided on one side of the fixing rod (8).

7. The centrifugal pump mechanical seal device with adjustable sealing degree according to claim 6, characterized in that: The filtration mechanism (9) includes a fine filter screen (901), which is embedded in the inner wall of the sealing shell (3), and a coarse filter screen (902) is fixedly installed inside the filter cylinder (6).

8. The centrifugal pump mechanical seal device with adjustable sealing degree according to claim 6, characterized in that: The fixed rod (8) has a movable plate (903) fixedly installed at one end that protrudes from the fine filter screen (901), and a scraper (904) is embedded in the outer wall of the movable plate (903) facing the fine filter screen (901).

9. The centrifugal pump mechanical seal device with adjustable sealing degree according to claim 5, characterized in that: A connecting ring (905) extends through the inside of the filter cylinder (6), and a flow hole (906) is provided on the inner wall of the second connecting plate (7).

10. A centrifugal pump mechanical seal device with adjustable sealing degree according to claim 9, characterized in that: The connecting ring (905) is threadedly connected to the filter cylinder (6), and the filter cylinder (6) is in communication with the sealing shell (3).

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