High rotating speed type duplex gear pump

Abstract

The utility model discloses a high rotation speed type duplex gear pump which comprises a base and a pump body fixedly installed at the upper end of the base, a driving shaft and a driven shaft are rotatably installed in the pump body, a driving gear is fixedly installed on the outer side of the driving shaft, a driven gear is fixedly installed on the outer side of the driven shaft, and the driven gear is fixedly installed on the outer side of the driving shaft. The outer side of the driving shaft and the outer side of the driven shaft are sleeved with rotating bearings, and the rotating bearings are located in the pump body. According to the high-rotating-speed duplex gear pump, the outer sealing rubber ring and the inner sealing rubber ring deform on the outer side of the butt-joint pipe, a gap between the butt-joint pipe and the outer connecting pipe can be filled, the butt-joint sealing performance of the butt-joint pipe is guaranteed, the sealing piece moves in the oil outlet pipe, and therefore the sealing performance of the butt-joint pipe is improved. The lubricating oil in the oil frame can be automatically discharged and injected into the rotating bearing, the effect of automatically adding the lubricating oil to the rotating bearing can be achieved, the lubricating oil adding convenience is improved, and the rotating lubricating effect of the rotating bearing is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of double - gear pumps, and specifically relates to a high - speed double - gear pump. Background Technique

[0002] A gear pump is a pump body that completes the transportation of liquid through the meshing rotation of gears. A double - gear pump is a type of gear pump, which can suck liquid through two groups of pipelines, improving the working efficiency of the gear pump;

[0003] However, there are still certain defects in the existing double - shaft gear pumps during operation. The adjacent parts inside the pump body are positioned by positioning pins or bosses to ensure the assembly accuracy, which increases the processing difficulty and cost and cannot guarantee the overall assembly accuracy requirements;

[0004] The patent application publication number CN109899284A discloses a high - speed lightweight gear pump. The main shaft of this gear pump adopts a stepped structure with increasing dimensions and the largest outer diameter at the shaft extension, realizing the assembly technology of large shaft extension at one end of the gear shaft, small intermediate gear shaft, and sequentially installing each part on the shaft through one end of the main shaft, providing an effective new method for such assembly structures;

[0005] In the above - mentioned disclosed patent, the above - mentioned problems are solved, but there are still the following problems in the specific operation of the gear pump in this patent. During the installation of the gear pump, lubricating oil is added to the inside of the bearing to ensure the lubrication effect of the bearing. During the use of the gear pump, the lubricating oil will be consumed and needs to be added again. During the process of adding lubricating oil to this gear, the gear pump needs to be disassembled, and after disassembly, lubricating oil needs to be added to each bearing one by one, increasing the complexity of adding lubricating oil to the gear pump and also prolonging the time for adding lubricating oil.

[0006] In view of the above problems, it is urgent to innovate and design on the basis of the original gear pump structure. Content of the Utility Model

[0007] The purpose of the utility model is to provide a high - speed double - gear pump to solve the problem that during the use of the gear pump in the above - mentioned background technique, the lubricating oil will be consumed and needs to be added again. During the process of adding lubricating oil to this gear, the gear pump needs to be disassembled, and after disassembly, lubricating oil needs to be added to each bearing one by one, increasing the complexity of adding lubricating oil to the gear pump and also prolonging the time for adding lubricating oil.

[0008] To achieve the above - mentioned purpose, the utility model provides the following technical solution: A high - speed double - gear pump, including a base and a pump body fixedly installed on the upper end of the base;

[0009] The inside of the pump body is rotatably installed with a driving shaft and a driven shaft. A main gear is fixedly installed on the outside of the driving shaft, and a driven gear is fixedly installed on the outside of the driven shaft. At the same time, the driven gear is meshed with the main gear. Rotating bearings are sleeved on the outside of the driving shaft and the driven shaft, and the rotating bearings are located inside the pump body. A pump cavity is formed inside the pump body. The driven gear and the main gear are located inside the pump cavity. A docking pipe is fixedly installed on the outside of the pump body, and the docking pipe is located outside the open end of the pump cavity;

[0010] A lubrication structure is arranged inside the pump body, and the lubrication structure can realize the automatic oil filling process of the rotating bearing;

[0011] The lubrication structure is provided with an oil frame, and the oil frame is fixedly installed on the outside of the pump body. An oil outlet pipe is fixedly installed at the lower end of the oil frame, and the oil outlet pipe is fixedly installed inside the pump body.

[0012] Preferably, a sliding plate is slidably installed inside the oil outlet pipe. A moving rod is fixedly installed inside the sliding plate, and a sealing member is fixedly installed at the upper end of the moving rod. At the same time, the sealing member is in close contact with the inner surface of the oil outlet pipe. An oil delivery pipe is fixedly installed on the outside of the oil outlet pipe, and the end of the oil delivery pipe away from the oil outlet pipe is in close fit with the rotating bearing.

[0013] Preferably, a return spring is sleeved on the outside of the moving rod. The return spring is located below the sliding plate, and the upper and lower ends of the return spring are respectively fixedly connected to the sliding plate and the base.

[0014] Preferably, a mounting shaft is rotatably installed inside the base. A cam and a large gear are fixedly installed on the outside of the mounting shaft, and the cam is located directly below the moving rod.

[0015] Preferably, a small gear is fixedly installed at one end of the driving shaft close to the pump body. The small gear is meshed with the large gear, and the radius of the large gear is larger than the radius of the small gear.

[0016] Preferably, an outer sealing rubber ring, an inner sealing rubber ring and a sealing ring are nested and installed on the outside of the docking pipe, and the radius of the sealing ring is smaller than the radii of the outer sealing rubber ring and the inner sealing rubber ring.

[0017] Preferably, an air delivery pipe is fixedly installed between the outer sealing rubber ring and the inner sealing rubber ring, and the inside of the outer sealing rubber ring and the inner sealing rubber ring is communicated through the air delivery pipe.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] 1. By moving inside the oil outlet pipe through the seal, the lubricating oil inside the oil frame can be automatically discharged and filled inside the rotating bearing, achieving the effect of automatically adding lubricating oil to the rotating bearing, improving the convenience of adding lubricating oil, and ensuring the rotating lubrication effect of the rotating bearing;

[0020] 2. By deforming the outer sealing rubber ring and the inner sealing rubber ring on the outside of the docking pipe, the gap between the docking pipe and the outer connecting pipe can be filled, ensuring the sealing performance of the docking of the docking pipe;

[0021] 3. Further, by arranging an oil delivery pipe inside the pump body, the oil delivery pipe can complete the lubricating oil filling for the rotating bearing, improving the convenience of the operation of this gear pump;

[0022] 4. Even further, by arranging two groups of docking pipes on both sides of the pump body, the inertia of the liquid delivery direction can be ensured, improving the smoothness of the liquid delivery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0024] Figure 2 is a front cross-sectional structural schematic diagram of the present utility model;

[0025] Figure 3 is a left cross-sectional structural schematic diagram of the present utility model;

[0026] Figure 4 is a front cross-sectional structural schematic diagram of the oil outlet pipe of the present utility model;

[0027] Figure 5 is a sectional three-dimensional structural schematic diagram of the oil outlet pipe of the present utility model;

[0028] Figure 6 is a three-dimensional structural schematic diagram of the docking pipe of the present utility model.

[0029] In the figure: 1, base; 2, pump body; 3, driving shaft; 4, main gear; 5, driven shaft; 6, driven gear; 7, rotating bearing; 8, pump chamber; 9, docking pipe; 10, oil frame; 11, oil outlet pipe; 12, sliding plate; 13, moving rod; 14, seal; 15, return spring; 16, oil delivery pipe; 17, mounting shaft; 18, cam; 19, large gear; 20, small gear; 21, outer sealing rubber ring; 22, inner sealing rubber ring; 23, sealing ring; 24, air delivery pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] In a specific embodiment, as Figures 1 - 3 shown, the basic working process of the double gear pump is disclosed;

[0032] The base 1 and the pump body 2 fixedly installed at the upper end of the base 1;

[0033] A driving shaft 3 and a driven shaft 5 are rotatably installed inside the pump body 2. A main gear 4 is fixedly installed on the outer side of the driving shaft 3, and a driven gear 6 is fixedly installed on the outer side of the driven shaft 5. At the same time, the driven gear 6 is meshed and connected with the main gear 4. Rotating bearings 7 are sleeved on the outer sides of the driving shaft 3 and the driven shaft 5, and the rotating bearings 7 are located inside the pump body 2. A pump chamber 8 is formed inside the pump body 2. The driven gear 6 and the main gear 4 are located inside the pump chamber 8. A connecting pipe 9 is fixedly installed on the outer side of the pump body 2, and the connecting pipe 9 is located outside the open end of the pump chamber 8.

[0034] When using this high-speed double gear pump, it is necessary to connect the driving shaft 3 on the outer side of the pump body 2 with the driving device, and then connect the pipeline with the two connecting pipes 9 for installation. After that, the gear pump can be driven to work by the driving device;

[0035] During the working process, the driving device will drive the driving shaft 3 to rotate, and the rotation of the driving shaft 3 will drive the driven gear 6 and the driven shaft 5 to rotate through the main gear 4. At this time, the driven shaft 5 and the driving shaft 3 will rotate inside the rotating bearings 7, and the rotation of the main gear 4 and the driven gear 6 will discharge the air inside the pump body 2 from one connecting pipe 9, so as to pump the liquid into the pump body 2 through the other connecting pipe 9. At this time, the liquid inside the pump body 2 will be discharged through the connecting pipe 9 where the gas is discharged, completing the working process of the gear pump.

[0036] In one specific embodiment, as Figures 1 - 5 shown, the problem that the existing gear pump needs to be disassembled to add lubricating oil is solved;

[0037] A lubricating structure is provided inside the pump body 2, and the lubricating structure can realize the automatic oil filling process of the rotating bearings 7;

[0038] The lubricating structure is provided with an oil frame 10, and the oil frame 10 is fixedly installed on the outer side of the pump body 2. The lower end of the oil frame 10 is fixedly installed with an oil outlet pipe 11, and the oil outlet pipe 11 is fixedly installed inside the pump body 2;

[0039] A sliding plate 12 is slidably installed inside the oil outlet pipe 11, a moving rod 13 is fixedly installed inside the sliding plate 12, an upper end of the moving rod 13 is fixedly installed with a seal 14, and the seal 14 is in close contact with the inner surface of the oil outlet pipe 11. An oil delivery pipe 16 is fixedly installed outside the oil outlet pipe 11, and one end of the oil delivery pipe 16 away from the oil outlet pipe 11 is in close fit with the rotating bearing 7;

[0040] A return spring 15 is sleeved outside the moving rod 13, the return spring 15 is located below the sliding plate 12, and the upper and lower ends of the return spring 15 are respectively fixedly connected to the sliding plate 12 and the base 1;

[0041] A mounting shaft 17 is rotatably installed inside the base 1, a cam 18 and a large gear 19 are fixedly installed outside the mounting shaft 17, and the cam 18 is located directly below the moving rod 13;

[0042] One end of the driving shaft 3 close to the pump body 2 is fixedly installed with a small gear 20, the small gear 20 is meshed with the large gear 19, and the radius dimension of the large gear 19 is larger than the radius dimension of the small gear 20.

[0043] When using this high-speed double gear pump, the driving shaft 3 and the driven shaft 5 need to rotate synchronously. During the rotation of the driving shaft 3, the small gear 20 will be driven to rotate. The small gear 20 will drive the large gear 19 meshed with it to rotate. At this time, the large gear 19 will drive the cam 18 to rotate through the mounting shaft 17. During the rotation of the cam 18, it will contact the lower end of the moving rod 13 and push the moving rod 13 upward. During the upward movement of the moving rod 13, the sliding plate 12 and the seal 14 will be driven to move upward. During the upward movement of the seal 14, a gap will be generated between the seal 14 and the oil outlet pipe 11. When the sliding plate 12 moves upward, the return spring 15 will be stretched due to expansion. After a gap is generated between the seal 14 and the oil outlet pipe 11, the lubricating oil inside the oil frame 10 will enter the inside of the oil outlet pipe 11 through this gap, and then enter the inside of the oil delivery pipe 16. At this time, the lubricating oil will automatically add lubricating oil to the rotating bearing 7 through the oil delivery pipe 16, achieving the effect of lubricating the inside of the rotating bearing 7. During the rotation of the cam 18, the return spring 15 will contract and cause the sliding plate 12 to move downward, so that the moving rod 13 and the seal 14 slide downward and the seal 14 seals with the oil outlet pipe 11, avoiding continuous leakage of lubricating oil and causing waste. Thus, the process of automatically adding lubricating oil to this gear pump is completed, effectively improving the stability of the high speed of this gear pump.

[0044] On the basis of the above embodiments, such as Figures 1 - 3 and Figure 6As shown, it solves the problem that the existing pipeline of the gear pump is prone to loose sealing during butt joint;

[0045] An outer sealing rubber ring 21, an inner sealing rubber ring 22 and a sealing ring 23 are nested and installed on the outer side of the butt joint pipe 9, and the radius of the sealing ring 23 is smaller than the radii of the outer sealing rubber ring 21 and the inner sealing rubber ring 22;

[0046] An air delivery pipe 24 is fixedly installed between the outer sealing rubber ring 21 and the inner sealing rubber ring 22, and the inside of the outer sealing rubber ring 21 and the inner sealing rubber ring 22 is conducted through the air delivery pipe 24.

[0047] When using this high-speed double gear pump, it is necessary to butt joint the infusion pipeline with the butt joint pipe 9. During the butt joint process of the butt joint pipe 9, the outer sealing rubber ring 21 and the inner sealing rubber ring 22 will be squeezed by the butt joint pipe 9 and the outer connecting pipe. At this time, the outer sealing rubber ring 21 and the inner sealing rubber ring 22 will deform. The deformation of the outer sealing rubber ring 21 and the inner sealing rubber ring 22 will fill the gap between the two groups of pipelines, and the outer sealing rubber ring 21 and the inner sealing rubber ring 22 will exchange air with each other through the air delivery pipe 24, so as to ensure the tightness of the fit between the outer sealing rubber ring 21 and the inner sealing rubber ring 22 and the pipeline. And the sealing ring 23 will also deform and fill the gap, so as to ensure the sealing effect of the pipeline butt joint and increase the overall practicability.

[0048] The content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed double gear pump, comprising a base (1) and a pump body (2) fixedly installed at the upper end of the base (1); It is characterized in that: It further includes that a driving shaft (3) and a driven shaft (5) are rotatably installed inside the pump body (2), a main gear (4) is fixedly installed on the outer side of the driving shaft (3), a driven gear (6) is fixedly installed on the outer side of the driven shaft (5), and the driven gear (6) is meshed and connected with the main gear (4). Rotating bearings (7) are sleeved on the outer sides of the driving shaft (3) and the driven shaft (5), and the rotating bearings (7) are located inside the pump body (2). A pump chamber (8) is formed inside the pump body (2), and the driven gear (6) and the main gear (4) are located inside the pump chamber (8). A docking pipe (9) is fixedly installed on the outer side of the pump body (2), and the docking pipe (9) is located on the outer side of the open end of the pump chamber (8); A lubrication structure is arranged inside the pump body (2), and the lubrication structure can realize the automatic oil filling process of the rotating bearing (7); The lubrication structure is provided with an oil frame (10), and the oil frame (10) is fixedly installed on the outer side of the pump body (2), and an oil outlet pipe (11) is fixedly installed at the lower end of the oil frame (10), and the oil outlet pipe (11) is fixedly installed inside the pump body (2).

2. The high-speed double gear pump according to claim 1, characterized in that: A sliding plate (12) is slidably installed inside the oil outlet pipe (11), a moving rod (13) is fixedly installed inside the sliding plate (12), a sealing member (14) is fixedly installed at the upper end of the moving rod (13), and the sealing member (14) is in close contact with the inner surface of the oil outlet pipe (11). An oil delivery pipe (16) is fixedly installed on the outer side of the oil outlet pipe (11), and one end of the oil delivery pipe (16) far away from the oil outlet pipe (11) is in close fit with the rotating bearing (7).

3. The high-speed type double gear pump according to claim 2, wherein: A return spring (15) is sleeved on the outer side of the moving rod (13), and the return spring (15) is located at the lower end of the sliding plate (12), and the upper and lower ends of the return spring (15) are respectively fixedly connected with the sliding plate (12) and the base (1).

4. A high-speed double gear pump according to claim 1, characterized in that: A mounting shaft (17) is rotatably installed inside the base (1), a cam (18) and a large gear (19) are fixedly installed on the outer side of the mounting shaft (17), and the cam (18) is located directly below the moving rod (13).

5. The high-speed type double gear pump according to claim 1, characterized in that: A small gear (20) is fixedly installed at one end of the driving shaft (3) close to the pump body (2), and the small gear (20) is meshed and connected with the large gear (19), and the radius dimension of the large gear (19) is larger than the radius dimension of the small gear (20).

6. The high-speed double gear pump according to claim 1, wherein: An outer sealing rubber ring (21), an inner sealing rubber ring (22) and a sealing ring (23) are nested and installed on the outer side of the docking pipe (9), and the radius of the sealing ring (23) is smaller than the radii of the outer sealing rubber ring (21) and the inner sealing rubber ring (22).

7. A high-speed type double gear pump according to claim 1, characterized in that: An air delivery pipe (24) is fixedly installed between the outer sealing rubber ring (21) and the inner sealing rubber ring (22), and the inside of the outer sealing rubber ring (21) and the inner sealing rubber ring (22) is conducted through the air delivery pipe (24).

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