High-pressure gear pump with good sealing effect

Abstract

The utility model relates to the technical field of hydraulic equipment, in particular to a high-pressure gear pump with a good sealing effect, which comprises a pump body, a front end cover and a rear end cover, the front end cover and the rear end cover are respectively arranged on two sides of the pump body, and fastening screws are symmetrically and fixedly connected on two sides of the pump body. The front end cover and the rear end cover are connected with the fastening screw through fastening nuts and are in sealed connection with the pump body, sealing gaskets are arranged on the two sides of the pump body and located outside the fastening screw and between the front end cover and the rear end cover, and sealing protrusions are fixedly connected to the sides, close to the front end cover and the rear end cover, of the two sides of the pump body. Sealing grooves are formed in the two sides of the sealing gasket. The sealing structure has the advantages that the front end cover, the rear end cover, the sealing protrusions on one side of the pump body and the sealing grooves in the two sides of the sealing gasket are used in cooperation, the rotating bearing is pressed through the pressing threaded ring, efficient sealing is achieved from a plurality of key parts, liquid leakage is effectively prevented, and the service life of the sealing structure is prolonged. And the sealing reliability of the pump under the high-pressure working condition is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic equipment technology, and in particular to a high-pressure gear pump with good sealing effect. Background Technology

[0002] As a key component in hydraulic systems, high-pressure gear pumps achieve liquid intake and discharge through the meshing of gears. When operating under high pressure conditions, they have extremely high requirements for sealing performance.

[0003] High-pressure gear pumps are suitable for applications requiring high-pressure liquid transportation, such as engineering machinery, petrochemicals, and shipbuilding. They can effectively prevent liquid leakage and improve pump efficiency and reliability.

[0004] Traditional high-pressure gear pumps suffer from several sealing problems: First, the seal between the pump body and the end cover typically uses ordinary rubber sealing rings, which are prone to deformation and aging under the impact of high-pressure liquid, leading to seal failure and liquid leakage. Second, the shaft seal structure between the gear shaft and the pump body has poor sealing performance, and the high-speed rotating gear shaft will aggravate the wear of the shaft seal, increasing the leakage. This not only reduces the pump's volumetric efficiency but may also cause safety hazards. Third, the clearance at the gear meshing point is difficult to control effectively, and under high pressure, liquid can easily leak from the meshing gap, affecting the stability of the pump's output pressure and flow rate.

[0005] To address the above issues, we have developed a high-pressure gear pump with excellent sealing performance. Summary of the Invention

[0006] This utility model discloses a high-pressure gear pump with good sealing effect, which aims to solve the technical problems in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a high-pressure gear pump with good sealing effect, comprising a pump body, a front cover, and a rear cover. The front cover and the rear cover are respectively disposed on both sides of the pump body. Fastening screws are symmetrically fixedly connected to both sides of the pump body. The front cover and the rear cover are connected to the fastening screws by fastening nuts for sealing connection with the pump body. Anti-vibration springs are provided on the side of the fastening nut that contacts the front cover and the rear cover and is located outside the fastening screw. Sealing gaskets are provided on both sides of the pump body, outside the fastening screw and between the front cover and the rear cover. Sealing protrusions are fixedly connected to both sides of the pump body that are close to the front cover and the rear cover. Sealing grooves are provided on both sides of the sealing gasket, and the sealing protrusions cooperate with the corresponding sealing grooves.

[0008] When installing a high-pressure gear pump, place the sealing gasket between the pump body and the front and rear covers, so that the sealing protrusion is embedded in the sealing groove. Tighten the fastening screw with the fastening nut. The anti-vibration spring reduces the impact of operating vibration on the seal and effectively prevents liquid leakage.

[0009] In a preferred embodiment, two waterproof bearings are fixedly connected inside the front end cover and the rear end cover. A drive shaft and a driven shaft are respectively provided between the two waterproof bearings. Key pins are fixedly connected to the outside of the drive shaft and the driven shaft. A drive gear is fixedly connected to the outside of the drive shaft, and a driven gear is fixedly connected to the outside of the driven shaft. The drive gear and the driven gear are used in conjunction.

[0010] In industrial hydraulic systems, power is transmitted to the drive shaft, and key pins ensure that the drive shaft and drive gear rotate synchronously. The drive gear drives the driven gear, and waterproof bearings prevent liquid from seeping into the bearings, ensuring stable operation of the gear pump.

[0011] In a preferred embodiment, one end of the drive shaft passes through the front end cover and is fixedly connected to a pulley, which is connected to the drive belt of an external power device.

[0012] An external motor drives a pulley via a transmission belt, which in turn drives the drive shaft to rotate, enabling the gear pump to provide lubricant to various machine tool components and facilitating power connection with different power equipment.

[0013] In a preferred embodiment, a detection cover is connected to one side of the front cover by fastening screws, and a rotating bearing connected to the drive shaft is fixedly connected inside the detection cover.

[0014] During regular maintenance, unscrew the fastening screws, open the inspection cover, check the wear of the rotating bearing, promptly detect any abnormalities in the drive shaft rotation, ensure the gear pump operates normally, and avoid equipment failure due to bearing problems.

[0015] In a preferred embodiment, a clamping threaded ring is threaded onto the outside of the drive shaft and on the side of the rotating bearing.

[0016] When installing the test cover, tighten the clamping thread ring to firmly fix the rotating bearing on the drive shaft, prevent the bearing from loosening, ensure the stability and sealing of the drive shaft rotation, and reduce the risk of leakage.

[0017] In a preferred embodiment, connecting pipes are fixedly connected to both sides of the pump body, one end of each connecting pipe extends into the interior of the pump body, and the end of each connecting pipe away from the pump body is connected to the external input and output terminals via a flange.

[0018] The connecting pipe is quickly connected to the pipeline by a flange, allowing the high-pressure gear pump to transport media such as oil from the input end to the output end. The connection is firm and easy to disassemble and maintain.

[0019] In a preferred embodiment, mounting brackets are fixedly connected to both sides of the bottom of the pump body.

[0020] The pump body is fixed in the designated position using the mounting bracket to ensure that the pump body is installed stably, can adapt to the vibration environment, and ensures that the gear pump works reliably.

[0021] The high-pressure gear pump with good sealing effect provided by this utility model has the following advantages: In this utility model, the sealing protrusion on one side of the front cover, the rear cover and the pump body cooperate with the sealing grooves on both sides of the sealing gasket, and the pressing of the threaded ring on the rotating bearing, to achieve efficient sealing from multiple key parts, effectively prevent liquid leakage, improve the sealing reliability of the pump under high pressure conditions, and greatly improve the operation quality and efficiency compared with traditional devices. Attached Figure Description

[0022] Figure 1 This is a first-view perspective three-dimensional schematic diagram of a high-pressure gear pump with good sealing effect proposed in this utility model.

[0023] Figure 2 This is a second-view perspective three-dimensional schematic diagram of a high-pressure gear pump with good sealing effect proposed in this utility model.

[0024] Figure 3 This is a cross-sectional structural diagram of a high-pressure gear pump with good sealing effect proposed in this utility model.

[0025] Figure 4 This is an exploded structural diagram of the rear end cover of a high-pressure gear pump with good sealing effect proposed in this utility model.

[0026] Figure 5 This is an exploded structural diagram of the front cover of a high-pressure gear pump with good sealing effect proposed in this utility model.

[0027] Figure 6 This is an exploded structural diagram of the drive shaft and driven shaft of a high-pressure gear pump with good sealing effect proposed in this utility model.

[0028] Figure 7 for Figure 3 Enlarged view of point A in the middle.

[0029] In the attached diagram: 1. Pump body; 2. Front cover; 3. Rear cover; 4. Fastening screw; 5. Fastening nut; 6. Anti-vibration spring; 7. Sealing gasket; 8. Sealing protrusion; 9. Waterproof bearing; 10. Drive shaft; 11. Driven shaft; 12. Key pin; 13. Drive gear; 14. Driven gear; 15. Pulley; 16. Inspection cover; 17. Rotary bearing; 18. Pressing threaded ring; 19. Connecting pipe; 20. Flange; 21. Sealing groove; 22. Mounting connection bracket. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The high-pressure gear pump with good sealing effect disclosed in this utility model is mainly used in hydraulic equipment.

[0032] Reference Figures 1-7 A high-pressure gear pump with good sealing effect includes a pump body 1, a front cover 2, and a rear cover 3. The front cover 2 and the rear cover 3 are respectively disposed on both sides of the pump body 1. Fastening screws 4 are symmetrically fixedly connected to both sides of the pump body 1. The front cover 2 and the rear cover 3 are connected to the fastening screws 4 by fastening nuts 5 to form a sealed connection with the pump body 1. Anti-vibration springs 6 are provided on the side of the fastening nuts 5 that contacts the front cover 2 and the rear cover 3 and are located outside the fastening screws 4. Sealing gaskets 7 are provided on both sides of the pump body 1, outside the fastening screws 4 and between the front cover 2 and the rear cover 3. Sealing protrusions 8 are fixedly connected on both sides of the pump body 1 that are close to the front cover 2 and the rear cover 3. Sealing grooves 21 are provided on both sides of the sealing gaskets 7. The sealing protrusions 8 are used in conjunction with the corresponding sealing grooves 21.

[0033] In this embodiment, when installing the high-pressure gear pump, the sealing gasket 7 is placed between the pump body 1 and the front cover 2 and the rear cover 3, so that the sealing protrusion 8 is embedded in the sealing groove 21. The fastening nut 5 is used to tighten the fastening screw 4. The anti-vibration spring 6 reduces the impact of operating vibration on the seal and effectively prevents liquid leakage.

[0034] In a preferred embodiment, two waterproof bearings 9 are fixedly connected inside the front cover 2 and the rear cover 3. A drive shaft 10 and a driven shaft 11 are respectively provided between the two waterproof bearings 9. A key pin 12 is fixedly connected to the outside of the drive shaft 10 and the driven shaft 11. A drive gear 13 is fixedly connected to the outside of the drive shaft 10, and a driven gear 14 is fixedly connected to the outside of the driven shaft 11. The drive gear 13 and the driven gear 14 cooperate with each other.

[0035] In this embodiment: In the industrial hydraulic system, power is transmitted to the drive shaft 10, and the key pin 12 ensures that the drive shaft 10 and the drive gear 13 rotate synchronously. The drive gear 13 drives the driven gear 14, and the waterproof bearing 9 prevents liquid from seeping into the bearing, ensuring the stable operation of the gear pump.

[0036] In a preferred embodiment, one end of the drive shaft 10 passes through the front cover 2 and is fixedly connected to a pulley 15, which is connected to the drive belt of an external power device.

[0037] In this embodiment, an external motor drives the pulley 15 via a transmission belt, which in turn drives the drive shaft 10 to rotate, so that the gear pump provides lubricant to various parts of the machine tool, facilitating power connection with different power equipment.

[0038] In a preferred embodiment, a detection cover 16 is connected to one side of the front cover 2 by fastening screws, and a rotating bearing 17 connected to the drive shaft 10 is fixedly connected inside the detection cover 16.

[0039] In this embodiment: During regular maintenance, unscrew the fastening screws to open the inspection cover 16, check the wear of the rotating bearing 17, promptly detect abnormal rotation of the drive shaft 10, ensure the normal operation of the gear pump, and avoid equipment failure due to bearing problems.

[0040] In a preferred embodiment, a clamping threaded ring 18 is threadedly connected to the outside of the drive shaft 10 and to one side of the rotating bearing 17.

[0041] In this embodiment: when installing the test cover 16, tighten the clamping threaded ring 18 to firmly fix the rotating bearing 17 on the drive shaft 10, prevent the bearing from loosening, ensure the stability and sealing of the rotation of the drive shaft 10, and reduce the risk of leakage.

[0042] In a preferred embodiment, connecting pipes 19 are fixedly connected to both sides of the pump body 1. One end of each connecting pipe 19 extends into the interior of the pump body 1, and the end of each connecting pipe 19 away from the pump body 1 is connected to the external input and output terminals through a flange 20.

[0043] In this embodiment, the connecting pipe 19 is quickly connected to the pipeline via the flange 20, enabling the high-pressure gear pump to transport media such as oil from the input end to the output end. The connection is secure and easy to disassemble and maintain.

[0044] In a preferred embodiment, mounting brackets 22 are fixedly connected to both sides of the bottom of the pump body 1.

[0045] In this embodiment, the pump body 1 is fixed in a designated position using the mounting bracket 22 to ensure that the pump body 1 is installed stably, adapts to the vibration environment, and ensures that the gear pump works reliably.

[0046] Working principle: During use, the front cover 2 and the rear cover 3 are connected to the fastening screw 4 by the fastening nut 5. The anti-vibration spring 6 and the sealing gasket 7 ensure the sealing performance. The sealing protrusion 8 and the sealing groove 21 cooperate to enhance the sealing effect. The drive shaft 10 and the driven shaft 11 are supported by the waterproof bearing 9. The drive gear 13 meshes with the driven gear 14. The pulley 15 is connected to the external power equipment to drive the drive shaft 10 to rotate and drive the gear pump to work. The rotating bearing 17 and the clamping threaded ring 18 in the detection cover 16 ensure the stability of the drive shaft 10. The connecting pipe 19 is connected to the external input and output ends through the flange 20. The connecting bracket 22 is installed to fix the pump body 1, realizing the sealing, stable operation and efficient transmission of the high-pressure gear pump.

[0047] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A high-pressure gear pump with good sealing performance, comprising a pump body (1), a front end cover (2), and a rear end cover (3), characterized in that, The front cover (2) and the rear cover (3) are respectively set on both sides of the pump body (1). The two sides of the pump body (1) are symmetrically fixedly connected with fastening screws (4). The front cover (2) and the rear cover (3) are connected to the fastening screws (4) through fastening nuts (5) and sealed to the pump body (1). The fastening nuts (5) are provided with anti-vibration springs (6) on the side that contacts the front cover (2) and the rear cover (3) and are located outside the fastening screws (4). The two sides of the pump body (1) are provided with sealing gaskets (7) on the side that is outside the fastening screws (4) and between the front cover (2) and the rear cover (3). The two sides of the pump body (1) are fixedly connected with sealing protrusions (8) on the side that is close to the front cover (2) and the rear cover (3). The two sides of the sealing gaskets (7) are provided with sealing grooves (21). The sealing protrusions (8) are used in conjunction with the corresponding sealing grooves (21).

2. The high-pressure gear pump with good sealing effect according to claim 1, characterized in that, The front end cover (2) and the rear end cover (3) are each fixedly connected to two waterproof bearings (9). A drive shaft (10) and a driven shaft (11) are respectively provided between the two waterproof bearings (9). A key pin (12) is fixedly connected to the outside of the drive shaft (10) and the driven shaft (11). A drive gear (13) is fixedly connected to the outside of the drive shaft (10), and a driven gear (14) is fixedly connected to the outside of the driven shaft (11). The drive gear (13) and the driven gear (14) cooperate with each other.

3. The high-pressure gear pump with good sealing effect according to claim 2, characterized in that, One end of the drive shaft (10) passes through the front cover (2) and is fixedly connected to a pulley (15), which is connected to the transmission belt of an external power device.

4. A high-pressure gear pump with good sealing effect according to claim 2, characterized in that, A detection cover (16) is connected to one side of the front cover (2) by a fastening screw, and a rotating bearing (17) connected to the drive shaft (10) is fixedly connected inside the detection cover (16).

5. A high-pressure gear pump with good sealing effect according to claim 4, characterized in that, A clamping threaded ring (18) is threadedly connected to the outside of the drive shaft (10) and to one side of the rotating bearing (17).

6. A high-pressure gear pump with good sealing effect according to claim 1, characterized in that, Both sides of the pump body (1) are fixedly connected with connecting pipes (19), one end of each connecting pipe (19) extends into the interior of the pump body (1), and the end of each connecting pipe (19) away from the pump body (1) is connected to the external input and output ends through a flange (20).

7. A high-pressure gear pump with good sealing effect according to claim 1, characterized in that, The pump body (1) has mounting brackets (22) fixedly connected to both sides of its bottom.

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