Gear pump shaft sealing device

Abstract

The utility model provides a gear pump shaft sealing device which comprises a plurality of nested V-shaped sealing rings, first through holes are formed in the centers of the nested V-shaped sealing rings, the multiple nested V-shaped sealing rings are sequentially nested in second through holes of a shaft sleeve, and limiting baffles are arranged at the bottom ends of the second through holes; and a third through hole is formed in the center of the sealing gland, and the sealing gland is arranged at the top end of the shaft sleeve. According to the technical scheme, efficient and reliable sealing is achieved through layer-by-layer nesting of the multiple nested V-shaped sealing rings and the sealing cover, and the problem that liquid or gas leaks from the shaft part of the gear pump is solved.

Description

Technical Field

[0001] This application relates to the technical field of gear pump shaft seals, and particularly to a gear pump shaft seal device. Background Art

[0002] In a mechanical transmission system, a gear pump, as a common fluid transmission device, is widely used in various industrial fields. The gear pump rotates a pair of meshing gears in the pump body to suck in liquid or gas from the inlet, pressurize it, and discharge it from the outlet. However, during the operation of the gear pump, the sealing problem of the pump shaft has always been one of the key factors affecting the pump's performance and service life.

[0003] Traditional gear pump shaft sealing methods mostly use a single sealing ring or sealing rings. These sealing elements tend to experience problems such as wear, aging, or leakage when operating for a long time or facing harsh working conditions such as high pressure, high temperature, and corrosive media, resulting in a decrease in the pump's efficiency and even causing safety accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a gear pump shaft seal device that can achieve efficient and reliable sealing through a multi-layer nested gasket and a sealing cover, solving the problem of liquid or gas leakage from the shaft part of the gear pump.

[0005] To achieve the above purpose, this application is implemented through the following technical solutions, specifically including: a number of nested V-shaped sealing rings with a first through hole opened in the center, and a plurality of the nested V-shaped sealing rings are nested in sequence in the second through hole of the shaft sleeve, and a limiting baffle is provided at the bottom end of the second through hole; a sealing gland with a third through hole opened in the center, and the sealing gland is arranged at the top end of the shaft sleeve.

[0006] To fit with the nested V-shaped sealing ring and for subsequent connection with the shaft sleeve, to provide further pressing and fixing of the gasket, and enhance the sealing effect. As an option for the gear pump shaft seal device of this application, a protruding portion is provided on the side of the sealing gland that covers the shaft sleeve, and the protruding portion is embedded in the second through hole and fits on the nested V-shaped sealing ring.

[0007] To make the installation and disassembly of the sealing gland convenient, and at the same time to ensure a tight connection between the sealing gland and the shaft sleeve, preventing the problem of medium leakage caused by loose connection. As an option for the gear pump shaft seal device of this application, a first screw hole is also provided on the sealing gland; a second screw hole is also provided on the shaft sleeve; the sealing gland is screwed to the top end of the shaft sleeve through the first screw hole and the second screw hole.

[0008] To ensure the stable installation of the bushing on the gear pump body and provide support for the stable operation of the entire sealing device, as an option for the gear pump shaft sealing device of the present application, the bushing is arranged on the gear pump body, and the bushing is connected to the gear pump body by one of screw connection or welding connection.

[0009] As the power transmission component of the gear pump body, to ensure that the gear pump shaft remains in a sealed state during rotation to prevent medium leakage, as an option for the gear pump shaft sealing device of the present application, the gear pump shaft penetrates through the first through hole and the third through hole.

[0010] The beneficial effects of the present application are as follows:

[0011] The gear pump shaft sealing device provided by the technical solution of the present application includes: a plurality of nested V-shaped sealing rings with a first through hole opened in the center. A plurality of the nested V-shaped sealing rings are nested in the second through hole of the bushing in sequence to form a multi-layer sealing structure. If there is a situation where the nested V-shaped sealing ring is damaged, the remaining intact nested V-shaped sealing rings can still maintain the sealing state of the device. This design increases the reliability of the seal. And a limiting baffle is arranged at the bottom end of the second through hole to limit the downward movement of the nested V-shaped sealing ring and ensure the stable position of the nested V-shaped sealing ring in the bushing. And a sealing gland with a protruding portion and a third through hole opened in the center is arranged at the top end of the bushing, and the protruding portion is embedded in the second through hole and fitted on the nested V-shaped sealing ring. Through the fitting of the protruding portion and the nested V-shaped sealing ring, the sealing gland realizes further pressing and fixing of the nested V-shaped sealing ring, further enhancing the sealing effect. Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of a gear pump shaft sealing device;

[0013] Figure 2 It is a sectional structural schematic diagram of a gear pump shaft sealing device;

[0014] Figure 3 It is a structural schematic diagram of a nested V-shaped sealing ring;

[0015] Figure 4 It is a structural schematic diagram of a sealing gland;

[0016] Figure 5 It is a structural schematic diagram of a bushing;

[0017] Explanation of the Reference Numerals in the Drawings:

[0018] 100, nested V-shaped sealing ring; 101, first through hole;

[0019] 200. Bush; 201. Second through-hole; 202. Limit baffle; 203. Second screw hole;

[0020] 300. Sealing gland; 301. Protrusion; 302. Third through-hole; 303. First screw hole;

[0021] 400. Gear pump body;

[0022] 500. Gear pump shaft. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0025] Referring to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments can be included in at least one embodiment of this application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0026] In the description of the embodiments of this application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. The term "several" means two or more (including two).

[0027] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "upper", "middle", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of this application.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "arrange", "be provided with", "install", "be connected to", "connect", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0029] The inventors of the present application have proposed a shaft sealing device for a gear pump. Referring to Figures 1-5 , Figure 1 is a schematic structural diagram of a shaft sealing device for a gear pump provided by an embodiment of the present application, Figure 2 is a schematic sectional structure diagram of a shaft sealing device for a gear pump provided by an embodiment of the present application, Figure 3 is a schematic structural diagram of a nested V-shaped sealing ring provided by an embodiment of the present application, Figure 4 is a schematic structural diagram of a sealing gland provided by an embodiment of the present application, Figure 5 is a schematic structural diagram of a shaft sleeve provided by an embodiment of the present application;

[0030] Referring to Figures 1-2 , the shaft sealing device for a gear pump provided by the present application includes: a plurality of nested V-shaped sealing rings 100 with a first through hole 101 opened in the center. Among them, the specific structural diagram of the nested V-shaped sealing ring 100 can be referred to Figure 3 . A plurality of the nested V-shaped sealing rings 100 are nested in sequence in the second through hole 201 of the shaft sleeve 200 to form a multi-layer sealing structure. If there is a situation where the nested V-shaped sealing ring is damaged, the remaining intact nested V-shaped sealing rings can still maintain the sealing state of the device. This design increases the reliability of the seal. And a limit baffle 202 is provided at the bottom end of the second through hole 201 to limit the downward movement of the nested V-shaped sealing ring 100 and ensure the stable position of the nested V-shaped sealing ring 100 in the shaft sleeve 200. Among them, the specific structure of the shaft sleeve 200 can be referred to Figure 5 . And a sealing gland 300 provided with a convex portion 301 and having a third through hole 302 opened in the center is arranged at the top end of the shaft sleeve 200, and the convex portion 301 is embedded in the second through hole 201 and is fitted on the nested V-shaped sealing ring 100. Through the fitting of the convex portion 301 and the nested V-shaped sealing ring 100, the sealing gland 300 realizes the further pressing and fixing of the nested V-shaped sealing ring 100, further enhancing the sealing effect and solving the problem of leakage of liquid or gas from the shaft part of the gear pump. Among them, the specific structure of the sealing gland 300 can be referred to Figure 4 .

[0031] Continue to refer to Fig. 1- Figure 2 , a first screw hole 303 is further provided on the sealing gland 300; a second screw hole 203 is also provided on the bushing 200; the sealing gland 300 is screwed to the top of the bushing 200 through the first screw hole 303 and the second screw hole 203. This design makes the installation and disassembly of the sealing gland 300 convenient, improves the flexibility and maintainability of the sealing device, and at the same time this design also ensures the tightness of the connection between the sealing gland 300 and the bushing 200, preventing the problem of medium leakage caused by loose connection.

[0032] Continue to refer to Fig. 1- Figure 2 , the bushing 200 is arranged on the gear pump body 400. Optionally, the bushing 200 is connected to the gear pump body 400 by one of screw connection or welding connection, thereby ensuring the stable installation of the bushing 200 on the gear pump body 400 and providing a basis for the operation of the entire sealing device.

[0033] Continue to refer to Fig. 1- Figure 2 , as a power transmission component of the gear pump body 400, the gear pump shaft 500 needs to maintain a sealed state during rotation to prevent the gear pump body 400 from leaking during the process of transporting the medium. Therefore, the gear pump shaft 500 passes through the first through hole 101 and the third through hole 302, ensuring the sealing performance of the gear pump shaft 500 during rotation.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shaft seal device for a gear pump, characterized in that Including: A plurality of nested V-shaped sealing rings (100) with a first through hole (101) opened at the center. A plurality of the nested V-shaped sealing rings (100) are nested in sequence in a second through hole (201) of a bushing (200), and a limiting baffle (202) is provided at the bottom end of the second through hole (201); A sealing gland (300) with a third through hole (302) opened at the center, and the sealing gland (300) is arranged at the top end of the bushing (200).

2. The shaft sealing device of a gear pump according to claim 1, wherein A protruding portion (301) is provided on one side of the sealing gland (300) covering the bushing (200). The protruding portion (301) is embedded in the second through hole (201) and is fitted on the nested V-shaped sealing ring (100).

3. The shaft sealing device of a gear pump according to claim 1, wherein A first screw hole (303) is further provided on the sealing gland (300); A second screw hole (203) is also provided on the bushing (200); The sealing gland (300) is screwed to the top end of the bushing (200) through the first screw hole (303) and the second screw hole (203).

4. The shaft sealing device of a gear pump according to claim 1, wherein The bushing (200) is arranged on a gear pump body (400), and the bushing (200) is connected to the gear pump body (400) by one of screw connection or welding connection.

5. The shaft sealing device of a gear pump according to claim 1, wherein A gear pump shaft (500) penetrates through the first through hole (101) and the third through hole (302).

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