Low-noise helical gear pump

Abstract

The utility model relates to the technical field of gear pumps, and discloses a low-noise helical gear pump. Comprising a pump body, a first rotating shaft and a second rotating shaft are rotationally connected into the pump body, the shaft wall of the first rotating shaft is fixedly sleeved with a first helical tooth gear, the shaft wall of the second rotating shaft is fixedly sleeved with a second helical tooth gear, and the first helical tooth gear and the second helical tooth gear are meshed with each other; the portions, located on the two sides of the first helical gear, of the shaft body of the first rotating shaft and the shaft body of the second rotating shaft are fixedly sleeved with stable sleeves correspondingly, and annular notches are formed in the sleeve walls of the two stable sleeves on the right side. The first helical tooth gear and the second helical tooth gear are meshed through the helical tooth surfaces, compared with a straight gear, the meshing process of the first helical tooth gear and the second helical tooth gear is gradual-in and gradual-out, impact loads generated by instant full-tooth meshing of the straight gear are avoided, therefore, mechanical noise is reduced, axial component force of helical teeth is balanced through the stabilizing sleeve and the baffle ring, and shafting vibration is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gear pump technology, and in particular to a low-noise helical gear pump. Background Technology

[0002] A gear pump is a type of rotary positive displacement pump that transports fluids by utilizing the volume change caused by the meshing of gears. It features a simple structure, reliable operation, and convenient maintenance, and is widely used in industries such as petrochemicals, metallurgy, machinery manufacturing, and food processing. It is primarily used to transport liquids of various viscosities, such as lubricating oil, fuel oil, and hydraulic oil, and is particularly suitable for transporting high-viscosity, low-Reynolds-number fluids.

[0003] In existing technologies, helical gears are used to reduce noise during the operation of gear pumps. However, the meshing of helical gears is relatively tight, and they will wear down over time. The debris and impurities that fall off are not easy to detect and clean in time. If they extend into the gaps between the helical gears during use, they will affect the operation of the gear pump and generate significant noise. Therefore, this invention designs a low-noise helical gear pump. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the existing technology where the helical gear meshing is relatively tight, which will cause some wear after long-term use. The debris and impurities that fall off are not easy to detect and clean in time. If they extend to the gap of the helical gear during use, they will affect the operation of the gear pump and generate a lot of noise. Therefore, a low-noise helical gear pump is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A low-noise helical gear pump includes a pump body. A first rotating shaft and a second rotating shaft are rotatably connected inside the pump body. A first helical gear is fixedly sleeved on the shaft wall of the first rotating shaft, and a second helical gear is fixedly sleeved on the shaft wall of the second rotating shaft. The first and second helical gears mesh with each other. Stabilizing sleeves are fixedly sleeved on the shafts of the first and second rotating shafts on either side of the first helical gear. An annular notch is formed on the wall of the two stabilizing sleeves on the right side. A connecting ring is rotatably connected to the inner wall of the annular notch of the lower right stabilizing sleeve. A connecting seat is fixedly connected to the bottom of the connecting ring. The connecting seat is fixedly connected to the inner wall of the pump body. A housing is fixedly connected to the bottom of the pump body. A controller is provided on the inner wall of the housing. A connecting wire is fixedly connected to the upper surface of the controller. One end of the connecting wire, away from the controller, passes through the connecting seat and extends into the interior of the connecting ring, and is electrically connected to a pressure sensor. An alarm is electrically connected to the side wall of the controller.

[0007] Preferably, the inner wall of the pump body is fixedly connected with multiple sealing rings, and the shafts of the first and second rotating shafts are respectively fitted into the inner walls of the multiple sealing rings.

[0008] Preferably, a retaining ring is fixedly connected to the inner wall of the pump body, and the inner wall of the retaining ring is fitted onto the cylinder wall of the stabilizing sleeve.

[0009] Preferably, the inner wall of the top end of the connecting ring has an opening, and an elastic metal strip is fixedly connected to the inner wall of the opening. A movable shell is fixedly connected to the upper surface of the elastic metal strip, and a pressure rod is fixedly connected to the bottom of the movable shell. A sliding groove is formed on the inner wall of the connecting ring above the pressure sensor, and the rod wall of the pressure rod is slidably disposed on the inner wall of the sliding groove.

[0010] Preferably, a spherical groove is formed on the inner wall of the top of the movable shell, and a first ball bearing is rolled on the inner wall of the spherical groove of the movable shell.

[0011] Preferably, the connecting ring has a second ball bearing that rolls inside.

[0012] Compared with the prior art, this utility model provides a low-noise helical gear pump, which has the following beneficial effects:

[0013] 1. This low-noise helical gear pump uses a first helical gear and a second helical gear to mesh through helical tooth surfaces. Compared with spur gears, its meshing process is gradual, avoiding the impact load generated by the instantaneous full meshing of spur gears, thereby reducing mechanical noise. The axial component of the helical gear is balanced by the stabilizing sleeve and retaining ring, reducing shaft vibration.

[0014] 2. This low-noise helical gear pump uses the compression of impurities on the movable housing to push the elastic metal strip, causing the pressure rod to slide along the inner wall of the groove and compress the pressure sensor. The pressure sensor transmits data to the controller via a connecting wire. When the controller senses the data change, it can trigger the alarm to sound an alarm, which can improve the timeliness of personnel handling, reduce the wear inside the gear pump, extend its service life, and ensure quiet operation and stability.

[0015] 3. This low-noise helical gear pump uses an elastic metal strip inside the connecting ring to contact the stabilizing sleeve through the movable shell and pressure rod. When the shaft system experiences radial displacement due to load fluctuations, the elastic metal strip absorbs vibration energy through elastic deformation, thus avoiding noise caused by rigid collisions.

[0016] 4. This low-noise helical gear pump uses fluororubber sealing rings, which are respectively set at the shaft extension end and the gear meshing area to prevent lubricating oil leakage and the intrusion of external impurities. The clearance fit between the retaining ring and the stabilizing sleeve can further improve the seal. The first and second balls can reduce friction and wear. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a low-noise helical gear pump proposed in this utility model.

[0018] Figure 2 for Figure 1 Enlarged structural diagram of part A in the middle section;

[0019] Figure 3 for Figure 1 A side view of the structure of the first helical gear.

[0020] In the diagram: 1 Pump body, 2 First rotating shaft, 3 Second rotating shaft, 4 First helical gear, 5 Second helical gear, 6 Stabilizing sleeve, 7 Sealing ring, 8 Retaining ring, 9 Connecting ring, 10 Connecting seat, 11 Box body, 12 Controller, 13 Connecting wire, 14 Pressure sensor, 15 Alarm, 16 Elastic metal strip, 17 Movable shell, 18 Pressure rod, 19 First ball bearing, 20 Second ball bearing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1

[0023] Reference Figure 1-3 A low-noise helical gear pump includes a pump body 1. A first rotating shaft 2 and a second rotating shaft 3 are rotatably connected inside the pump body 1. A first helical gear 4 is fixedly sleeved on the shaft wall of the first rotating shaft 2, and a second helical gear 5 is fixedly sleeved on the shaft wall of the second rotating shaft 3. The first helical gear 4 and the second helical gear 5 mesh with each other. Stabilizing sleeves 6 are fixedly sleeved on the shafts of the first rotating shaft 2 and the second rotating shaft 3 on both sides of the first helical gear 4. Annular notches are formed on the walls of the two stabilizing sleeves 6 on the right side. A stabilizing sleeve is located on the lower right side. The sleeve 6 is rotatably connected to the inner wall of the annular notch with a connecting ring 9. The bottom of the connecting ring 9 is fixedly connected to a connecting seat 10. The connecting seat 10 is fixedly connected to the inner wall of the pump body 1. The bottom of the pump body 1 is fixedly connected to a box 11. The inner wall of the box 11 is provided with a controller 12. The upper surface of the controller 12 is fixedly connected to a connecting wire 13. The end of the connecting wire 13 away from the controller 12 passes through the connecting seat 10 and extends into the interior of the connecting ring 9 and is electrically connected to a pressure sensor 14. An alarm 15 is electrically connected to the side wall of the controller 12.

[0024] An opening is provided on the inner wall of the top of the connecting ring 9. An elastic metal strip 16 is fixedly connected to the inner wall of the opening of the connecting ring 9. A movable shell 17 is fixedly connected to the upper surface of the elastic metal strip 16. A pressure rod 18 is fixedly connected to the bottom of the movable shell 17. A sliding groove is provided on the inner wall of the connecting ring 9 above the pressure sensor 14. The rod wall of the pressure rod 18 is slidably disposed on the inner wall of the sliding groove.

[0025] In use, the first helical gear 4 and the second helical gear 5 mesh through the helical tooth surface. Compared with spur gears, the meshing process is gradual, avoiding the impact load generated by the instantaneous full tooth meshing of spur gears, thereby reducing mechanical noise. The axial component of the helical teeth is balanced by the stabilizing sleeve 6 and the retaining ring 8, reducing shaft vibration. At the same time, the overlap coefficient of the helical teeth is greater than 1, ensuring that at least one pair of teeth is always in contact during the meshing process, avoiding the flow pulsation caused by the sudden change in inter-tooth volume in traditional spur gear pumps. The sealing ring 7 on the inner wall of the pump body 1 improves the sealing performance and reduces the turbulent noise generated by high-pressure fluid leakage. The stabilizing sleeves 6 at both ends of the first rotating shaft 2 and the second rotating shaft 3 form a double-support point, enhancing the rigidity of the shaft system.

[0026] The elastic metal strip 16 inside the connecting ring 9 contacts the stabilizing sleeve through the movable shell 17 and the pressure rod 18. When the shaft system undergoes radial displacement due to load fluctuations, the elastic metal strip absorbs vibration energy through elastic deformation, avoiding noise caused by rigid collisions. When impurities enter the gap between the two stabilizing sleeves 6, the movable shell 17 is squeezed by the impurities, pushing the elastic metal strip 16 to compress, causing the pressure rod 18 to slide along the inner wall of the groove and squeeze the pressure sensor 14. The pressure sensor 14 transmits data to the controller 12 through the connecting line 13. After the controller 12 senses the data change, it can trigger the alarm 15 to issue an alarm, which can improve the timely handling by personnel, reduce the wear inside the gear pump, increase its service life, and ensure quiet operation and stability.

[0027] Example 2

[0028] Reference Figure 1-3 Multiple sealing rings 7 are fixedly connected to the inner wall of the pump body 1. The shafts of the first rotating shaft 2 and the second rotating shaft 3 are respectively fitted to the inner wall of the multiple sealing rings 7. A retaining ring 8 is fixedly connected to the inner wall of the pump body 1. The inner wall of the retaining ring 8 is fitted to the cylinder wall of the stabilizing sleeve 6. A spherical groove is opened on the inner wall of the top of the movable shell 17. A first ball 19 is rolled on the inner wall of the spherical groove of the movable shell 17. A second ball 20 is rolled inside the connecting ring 9.

[0029] The sealing ring 7 is made of fluororubber and is set at the shaft extension end and the gear meshing area to prevent lubricating oil leakage and external impurities from entering. The retaining ring 8 and the stabilizing sleeve 6 are fitted with a clearance to further improve the seal. The first ball 19 and the second ball 20 can reduce friction and wear.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-noise helical gear pump, comprising a pump body (1), characterized in that: The pump body (1) is internally connected to a first rotating shaft (2) and a second rotating shaft (3). A first helical gear (4) is fixedly sleeved on the shaft wall of the first rotating shaft (2), and a second helical gear (5) is fixedly sleeved on the shaft wall of the second rotating shaft (3). The first helical gear (4) and the second helical gear (5) are meshed with each other. Stabilizing sleeves (6) are fixedly sleeved on the shafts of the first rotating shaft (2) and the second rotating shaft (3) on both sides of the first helical gear (4). The two stabilizing sleeves (6) on the right side have annular notches on their sleeve walls. The stabilizing sleeve (6) on the lower right side is located on the inner wall of the annular notch. A connecting ring (9) is rotatably connected, and a connecting seat (10) is fixedly connected to the bottom of the connecting ring (9). The connecting seat (10) is fixedly connected to the inner wall of the pump body (1). A box (11) is fixedly connected to the bottom of the pump body (1). A controller (12) is provided on the inner wall of the box (11). A connecting line (13) is fixedly connected to the upper surface of the controller (12). The end of the connecting line (13) away from the controller (12) passes through the connecting seat (10) and extends into the interior of the connecting ring (9) and is electrically connected to a pressure sensor (14). An alarm (15) is electrically connected to the side wall of the controller (12).

2. The low-noise helical gear pump according to claim 1, characterized in that: The pump body (1) has multiple sealing rings (7) fixedly connected to its inner wall, and the shafts of the first rotating shaft (2) and the second rotating shaft (3) are respectively fitted into the inner walls of the multiple sealing rings (7).

3. The low-noise helical gear pump according to claim 1, characterized in that: A retaining ring (8) is fixedly connected to the inner wall of the pump body (1), and the inner wall of the retaining ring (8) is fitted onto the cylinder wall of the stabilizing sleeve (6).

4. A low-noise helical gear pump according to claim 1, characterized in that: The connecting ring (9) has an opening on its inner wall at the top. An elastic metal strip (16) is fixedly connected to the inner wall of the opening. A movable shell (17) is fixedly connected to the upper surface of the elastic metal strip (16). A pressure rod (18) is fixedly connected to the bottom of the movable shell (17). A sliding groove is provided on the inner wall of the connecting ring (9) above the pressure sensor (14). The rod wall of the pressure rod (18) is slidably disposed on the inner wall of the sliding groove.

5. A low-noise helical gear pump according to claim 4, characterized in that: The top inner wall of the movable shell (17) is provided with a spherical groove, and the movable shell (17) is provided with a first ball bearing (19) rolling on the inner wall of the spherical groove.

6. A low-noise helical gear pump according to claim 1, characterized in that: The connecting ring (9) is provided with a second ball bearing (20) that rolls inside.

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