Gear pump sealing structure

Abstract

The utility model discloses a gear pump sealing structure, which relates to the technical field of gear pumps and comprises a shell, a front end cover is arranged on the front side of the shell, a rear end cover is arranged on the rear side of the shell, first sealing grooves are formed in the front side face and the rear side face of the shell respectively, and second sealing grooves are formed in one side, close to the shell, of the front end cover and one side, close to the shell, of the rear end cover respectively. A sealing strip is arranged between the second sealing groove and the first sealing groove, a sealing gasket is fixedly connected to the sealing strip, a driving gear is rotationally connected to the upper end of the interior of the shell, a driven gear is rotationally connected to the lower end of the interior of the shell, the driving gear is meshed with the driven gear, and a sealing assembly is arranged on the rear side of the rear end cover. The scheme has the advantages that liquid is effectively prevented from leaking out from the position between the shell and the end cover during operation of the pump, the efficiency and flow output of the pump are improved, external impurities, dust and other substances are prevented from entering the pump, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, in particular to a gear pump sealing structure. Background Art

[0002] The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquid or increase its pressure. It consists of two closed spaces, two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the side where the gears are disengaged changes from small to large, forming a vacuum, sucking in the liquid, and the volume of the space on the side where the gears are meshing changes from large to small, squeezing the liquid into the pipeline. The suction chamber and the discharge chamber are separated by the meshing line of the two gears. The pressure at the discharge port of the gear pump depends entirely on the size of the resistance at the pump outlet.

[0003] Although the existing gear pump adopts a split design, its sealing performance is poor, which may cause liquid leakage in the gear pump during operation, which will not only cause environmental pollution, but also reduce the delivery efficiency of the pump. In order to achieve the required flow and pressure, it may be necessary to increase the pump's operating speed or increase the power, thereby increasing energy consumption. In view of the above problems, a gear pump sealing structure is proposed to solve them. Utility Model Content

[0004] In order to solve the above technical problems, a gear pump sealing structure is provided, which solves the problem that although the current existing gear pump adopts a split design, its sealing performance is poor, which may cause liquid leakage in the gear pump during operation, which will not only cause environmental pollution, but also may reduce the pump's delivery efficiency. In order to achieve the required flow and pressure, it may be necessary to increase the pump's operating speed or increase the power, thereby increasing energy consumption.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a gear pump sealing structure, including a shell, a front end cover is arranged on the front side of the shell, a rear end cover is arranged on the rear side of the shell, a first sealing groove is opened on both the front and rear side surfaces of the shell, a second sealing groove is opened on the front end cover and the rear end cover close to the shell side, a sealing strip is arranged between the second sealing groove and the first sealing groove, a sealing gasket is fixedly connected to the sealing strip, a driving gear is rotatably connected to the upper end of the shell, a driven gear is rotatably connected to the lower end of the shell, the driving gear is meshed with the driven gear, and a sealing assembly is arranged on the rear side of the rear end cover.

[0006] Preferably, the sealing assembly includes a main shaft, the front end of the main shaft is fixedly connected to the driving gear, a positioning ring is fixedly connected to the surface of the main shaft, a plurality of springs are fixedly connected to the rear side of the positioning ring, and a dynamic ring is fixedly connected to the end of the spring.

[0007] Preferably, a dynamic ring sealing ring is fixedly connected to the inner side of the dynamic ring, the dynamic ring sealing ring is in close contact with the surface of the main shaft, and a push ring is fixedly connected to the inner side of the dynamic ring, and the end face of the push ring is flush with the end face of the dynamic ring.

[0008] Preferably, the sealing assembly also includes a pressure cover, which is fixedly connected to the rear side of the rear end cover, a magnet is fixedly connected to the front side of the interior of the pressure cover, a static ring is fixedly connected to the front surface of the magnet, and the end face of the static ring abuts against the end faces of the dynamic ring and the push ring.

[0009] Preferably, a plurality of fixing seats are fixedly connected to the outer side of the shell, and fixing ears are fixedly connected to the outer sides of the front cover and the rear cover at positions corresponding to the fixing seats, and the fixing ears are fixedly connected to the fixing seats by screws.

[0010] Preferably, an oil filling hole is formed through the upper end of the gland.

[0011] Preferably, a liquid inlet pipe is fixedly connected to the right side of the shell, and a liquid outlet pipe is fixedly connected to the left side of the shell.

[0012] Compared with the prior art, the advantages of the utility model are:

[0013] 1. The front cover, rear cover and housing are sealed by the sealing groove, sealing strip and sealing gasket, which effectively prevents the liquid from leaking from between the housing and the end cover during the operation of the pump, thereby ensuring that more liquid is pushed to the outlet and improving the efficiency and flow output of the pump.

[0014] 2. A sealing component is added to the drive shaft, which can effectively prevent liquid from leaking from the rotating shaft of the pump, ensuring that there will be no liquid leakage during the operation of the pump, improving the safety and reliability of the pump system, preventing external impurities, dust and other substances from entering the pump, effectively reducing the wear of the internal parts of the pump and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is an exploded view of the utility model;

[0017] Figure 3 It is a schematic diagram of the internal structure of the sealing component in the utility model.

[0018] The numbers in the figure are:

[0019] 1. Shell; 2. Front cover; 3. Rear cover; 4. First sealing groove; 5. Second sealing groove; 6. Sealing strip; 7. Sealing gasket; 8. Driving gear; 9. Driven gear; 10. Sealing assembly; 1001. Main shaft; 1002. Positioning ring; 1003. Spring; 1004. Moving ring; 1005. Moving ring sealing ring; 1006. Pushing ring; 1007. Pressure cover; 1008. Magnet; 1009. Stationary ring; 1010. Oil filling hole; 11. Fixed seat; 12. Fixed ear; 13. Liquid inlet pipe; 14. Liquid outlet pipe. DETAILED DESCRIPTION

[0020] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0021] Reference Figure 1-3 As shown, a gear pump sealing structure includes a shell 1, a front end cover 2 is arranged on the front side of the shell 1, a rear end cover 3 is arranged on the rear side of the shell 1, a first sealing groove 4 is opened on both the front and rear sides of the shell 1, a second sealing groove 5 is opened on the side of the front end cover 2 and the rear end cover 3 close to the shell 1, a sealing strip 6 is arranged between the second sealing groove 5 and the first sealing groove 4, a sealing gasket 7 is fixedly connected to the sealing strip 6, a driving gear 8 is rotatably connected to the upper end of the shell 1, a driven gear 9 is rotatably connected to the lower end of the shell 1, the driving gear 8 is meshed with the driven gear 9, and a sealing assembly 10 is arranged on the rear side of the rear end cover 3.

[0022] Specifically, the sealing assembly 10 includes a main shaft 1001, the front end of the main shaft 1001 is fixedly connected to the driving gear 8, a positioning ring 1002 is fixedly connected to the surface of the main shaft 1001, a plurality of springs 1003 are fixedly connected to the rear side of the positioning ring 1002, and a dynamic ring 1004 is fixedly connected to the end of the spring 1003.

[0023] Specifically, a dynamic ring sealing ring 1005 is fixedly connected to the inner side of the dynamic ring 1004 , and the dynamic ring sealing ring 1005 is in close contact with the surface of the main shaft 1001 . A push ring 1006 is fixedly connected to the inner side of the dynamic ring 1004 , and the end face of the push ring 1006 is flush with the end face of the dynamic ring 1004 .

[0024] Furthermore, the sealing assembly 10 also includes a pressure cover 1007, which is fixedly connected to the rear side of the rear end cover 3. A magnet 1008 is fixedly connected to the front side of the pressure cover 1007. A static ring 1009 is fixedly connected to the front surface of the magnet 1008. The end face of the static ring 1009 abuts against the end faces of the dynamic ring 1004 and the push ring 1006. The dynamic ring 1004 and the static ring 1009 will wear after long-term friction. After the spring 1003 gradually stretches, its elastic force will gradually decrease, which may easily cause a gap between the dynamic ring 1004 and the static ring 1009, affecting the sealing effect. The magnet 1008 is added to adsorb the dynamic ring 1004 to ensure close contact between the dynamic ring 1004 and the static ring 1009 to ensure sealing.

[0025] Furthermore, a plurality of fixing seats 11 are fixedly connected to the outside of the shell 1, and fixing ears 12 are fixedly connected to the outsides of the front end cover 2 and the rear end cover 3 at positions corresponding to the fixing seats 11. The fixing ears 12 are fixedly connected to the fixing seats 11 by screws, and the fixing method is set on the outside to avoid drilling holes on the shell 1 and affecting the overall rigidity of the shell 1.

[0026] An oil filling hole 1010 is formed through the upper end of the pressure cover 1007, and the oil filling hole 1010 is used to inject oil into the space between the dynamic ring 1004 and the static ring 1009, thereby reducing the wear between the dynamic ring 1004 and the static ring 1009 and improving the sealing of the connection.

[0027] The right side of the shell 1 is fixedly connected with a liquid inlet pipe 13, and the left side of the shell 1 is fixedly connected with a liquid outlet pipe 14. The shell 1, the liquid inlet pipe 13 and the liquid outlet pipe 14 are integrally cast, which can ensure the integrity of the shell 1 and further improve the sealing of the pump body.

[0028] Working principle: Through the joint action of the first sealing groove 4, the second sealing groove 5, the sealing strip 6 and the sealing gasket 7, the shell 1 and the end cover are sealed, effectively preventing the liquid from leaking out from between the shell 1 and the end cover during the operation of the pump, thereby ensuring that more liquid is pushed to the outlet, improving the efficiency and flow output of the pump; a sealing component 10 is added to the main shaft 1001, which can effectively prevent the liquid from leaking out from the rotating shaft of the pump, ensuring that there will be no liquid leakage problem when the pump is running, improving the safety and reliability of the pump system, preventing external impurities, dust and other substances from entering the pump, effectively reducing the wear of internal parts of the pump, and extending the service life of the equipment.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A gear pump sealing structure, comprising a housing (1), characterized in that: A front end cover (2) is provided at the front side of the shell (1), and a rear end cover (3) is provided at the rear side of the shell (1). A first sealing groove (4) is provided on both the front and rear side surfaces of the shell (1). A second sealing groove (5) is provided on the side of the front end cover (2) and the rear end cover (3) close to the shell (1). A sealing strip (6) is provided between the second sealing groove (5) and the first sealing groove (4). A sealing gasket (7) is fixedly connected to the sealing strip (6). A driving gear (8) is rotatably connected to the upper end of the shell (1), and a driven gear (9) is rotatably connected to the lower end of the shell (1). The driving gear (8) is meshed with the driven gear (9). A sealing assembly (10) is provided on the rear side of the rear end cover (3).

2. A gear pump sealing structure according to claim 1, characterized in that: The sealing assembly (10) comprises a main shaft (1001), the front end of the main shaft (1001) is fixedly connected to the driving gear (8), a positioning ring (1002) is fixedly connected to the surface of the main shaft (1001), a plurality of springs (1003) are fixedly connected to the rear side of the positioning ring (1002), and a moving ring (1004) is fixedly connected to the end of the spring (1003).

3. A gear pump sealing structure according to claim 2, characterized in that: A dynamic ring sealing ring (1005) is fixedly connected to the inner side of the dynamic ring (1004), and the dynamic ring sealing ring (1005) is in close contact with the surface of the main shaft (1001). A push ring (1006) is fixedly connected to the inner side of the dynamic ring (1004), and the end face of the push ring (1006) is flush with the end face of the dynamic ring (1004).

4. A gear pump sealing structure according to claim 2, characterized in that: The sealing assembly (10) further comprises a pressure cover (1007), wherein the pressure cover (1007) is fixedly connected to the rear side of the rear end cover (3), a magnet (1008) is fixedly connected to the front side of the interior of the pressure cover (1007), a static ring (1009) is fixedly connected to the front surface of the magnet (1008), and the end face of the static ring (1009) abuts against the end faces of the dynamic ring (1004) and the push ring (1006).

5. A gear pump sealing structure according to claim 1, characterized in that: A plurality of fixing seats (11) are fixedly connected to the outside of the shell (1), and fixing ears (12) are fixedly connected to the outside of the front cover (2) and the rear cover (3) at positions corresponding to the fixing seats (11), and the fixing ears (12) are fixedly connected to the fixing seats (11) by screws.

6. A gear pump sealing structure according to claim 4, characterized in that: An oil injection hole (1010) is formed through the upper end of the gland (1007).

7. A gear pump sealing structure according to claim 1, characterized in that: A liquid inlet pipe (13) is fixedly connected to the right side of the shell (1), and a liquid outlet pipe (14) is fixedly connected to the left side of the shell (1).

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