High-lift impeller of centrifugal pump

Abstract

The centrifugal pump high-lift impeller comprises a pump shell, a rotatable impeller disc is installed in the middle of the rear wall of the pump shell, a center shaft is rotationally embedded in the middle of the impeller disc, one end of the center shaft extends into the pump shell and is fixedly provided with a crushing tool bit, and the outer side of the crushing tool bit is fixedly connected with a filter cylinder located on the front wall of the pump shell. A transmission assembly is in transmission connection between the impeller disc and the center shaft, a center sleeve is fixedly connected to the middle of the rear side of the impeller disc and rotationally connected with the pump shell, a plurality of blades are fixed to the front side of the impeller disc and located on the periphery of the filter cylinder at equal intervals, the servo motor drives the center shaft to rotate, and the center shaft drives the crushing tool bit to rotate at high speed. According to the centrifugal pump, the crushing tool bits can crush substances in the filter cylinder, the substances can be repeatedly crushed for multiple times through the crushing space of the cylindrical structure, the crushing effect is guaranteed, the substances can pass through the filter holes, the possibility that the centrifugal pump is blocked is avoided, and the operation safety of the centrifugal pump is fully guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a high-lift impeller of a centrifugal pump. Background Art

[0002] The basic structure of a centrifugal pump is composed of eight parts, namely: impeller, pump body, pump cover, water retaining ring, pump shaft, bearing, sealing ring, stuffing box, and the impeller is the core part of the centrifugal pump. It has high speed and high output force. The blades on the impeller play a major role. The inner and outer surfaces of the impeller are smooth to reduce the friction loss of water flow. When running, first fill the pump casing and the suction pipe with water, and then start the motor to make the pump shaft drive the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing for output;

[0003] Traditional technology can pre-crush the material entering the centrifugal pump, but the crushed material is easily affected by the water flow and clogged in the mesh of the filter, which will cause the filter to be clogged over time, and the anti-clogging effect cannot be guaranteed. In addition, the crushing device is set separately, which increases the production cost and power loss of the equipment. For this reason, the utility model discloses a centrifugal pump high-lift impeller for solving the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a high-lift impeller for a centrifugal pump to solve the problem that the traditional technology proposed in the above-mentioned background technology can crush the material entering the centrifugal pump in advance, but the crushed material is easily affected by the water flow and clogged in the mesh of the filter, which will cause the filter to be clogged over time, and the anti-clogging effect cannot be guaranteed. In addition, the crushing device is set separately, which increases the production cost of the equipment and the problem of power loss.

[0005] To achieve the above purpose, the utility model solves the above technical problems as follows:

[0006] A high-lift impeller of a centrifugal pump comprises a pump casing, a rotatable impeller disc is installed in the middle of the rear wall of the pump casing, a central shaft is rotatably embedded in the middle of the impeller disc, one end of the central shaft extends to the pump casing and a crushing cutter head is fixed therein, a filter cartridge is fixedly connected to the outside of the crushing cutter head and located on the front wall of the pump casing, and a transmission assembly is transmission-connected between the impeller disc and the central shaft.

[0007] As a further solution of the utility model, a center sleeve is fixedly connected to the middle part of the rear side of the impeller disc, and the center sleeve is rotatably connected to the pump casing. A plurality of blades are fixed equidistantly on the front side of the impeller disc and located on the periphery of the filter cartridge. The blades are arc-shaped and the gap between adjacent blades gradually increases from the center sleeve to the outside.

[0008] As a further solution of the utility model, the transmission assembly includes a rear end cover fixed to the rear side of the pump casing, a gear ring fixed to the outside of the end of the center sleeve, a first gear fixed to the outer wall of the center shaft, and a transmission rod rotatably embedded between the rear end cover and the rear wall of the pump casing, the end of the center shaft away from the crushing cutter head passes through the rear end cover, and the outer fixed sleeve of the transmission rod is provided with a second gear and a third gear, wherein the second gear is meshingly connected to the first gear, and the third gear is meshingly connected to the gear ring.

[0009] As a further solution of the present invention, the radius of the second gear is greater than the radius of the first gear, and the radius of the third gear is smaller than the radius of the gear ring.

[0010] As a further solution of the utility model, an inlet pipe is fixedly embedded in the middle of the front side of the pump housing, the inlet pipe is arranged directly opposite to the filter cartridge, and a discharge pipe is fixedly embedded in the edge of the pump housing, and the inlet direction of the discharge pipe is arranged tangent to the inner wall of the pump housing.

[0011] As a further solution of the utility model, the ends of the inlet pipe and the outlet pipe close to the pump housing are both gradually narrowed, and flange rings are fixed to the outer sides of the ends of the inlet pipe and the outlet pipe away from the pump housing.

[0012] As a further solution of the utility model, the filter cartridge is densely covered with filter holes, and the filter cartridge is rotatably connected to the impeller disk.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The centrifugal pump has a high-lift impeller. The servo motor drives the central shaft to rotate. The central shaft drives the crushing cutter head to rotate at high speed. The crushing cutter head can crush the material in the filter cartridge. The crushing space of the cylindrical structure allows the material to be crushed repeatedly, ensuring the crushing effect. The material can pass through the filter hole, avoiding the possibility of clogging of the centrifugal pump, fully ensuring the safe operation of the centrifugal pump, and improving the lift of the centrifugal pump;

[0015] 2. The centrifugal pump has a high-lift impeller. When the crushing cutter head rotates, the central shaft drives the first gear to rotate. The first gear reduces the speed of the second gear. The second gear rotates coaxially with the third gear, so that the third gear can reduce the speed of the gear ring. The gear ring drives the impeller disc to rotate at a high speed. The blades on the impeller disc centrifugally throw the water out, which simplifies the structure of the centrifugal pump with crushing function. When the impeller disc rotates at a low speed, the crushing cutter head can still maintain a high speed, ensuring the crushing effect when the centrifugal pump is running at low power;

[0016] 3. The high-lift impeller of the centrifugal pump and the end of the inlet pipe close to the pump casing are both designed with a variable diameter structure, which can increase the water pressure and flow rate in the pump casing. The arc-shaped blades help to more effectively guide the fluid to enter from the axial direction and transform it into radial flow, thereby improving the kinetic energy of the fluid and the efficiency of the pump. The gap between the blades gradually increases from the center sleeve to the outside, which helps to distribute the fluid more evenly on the impeller disk, reduce turbulence and eddy currents, and improve the flow efficiency of the fluid. It can reduce the impact of the fluid on the blades, reduce noise and vibration, and make the pump run more smoothly. It helps to accelerate the fluid from the center to the edge of the impeller, increase the flow rate and pressure of the fluid, thereby increasing the head of the pump. This blade design can adapt to media containing solid particles, allowing solid particles to pass smoothly through the blade gap, reducing wear. The discharge pipe tangent to the inner wall of the pump casing reduces the output resistance and increases the head of the centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a side view of a high-lift impeller of a centrifugal pump of the utility model;

[0019] Figure 2 This is a front view of a high-lift impeller of a centrifugal pump of the utility model;

[0020] Figure 3 It is a side sectional view of a high-lift impeller of a centrifugal pump of the utility model;

[0021] Figure 4 This utility model is a centrifugal pump high lift impeller attachment Figure 3 Structural cross-sectional view along the AA direction;

[0022] Figure 5 This is a front cross-sectional view of a high-lift impeller of a centrifugal pump of the utility model;

[0023] Figure 6 This utility model is a centrifugal pump high lift impeller attachment Figure 3 A magnified view of the structure at point B.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. Pump casing; 11. Inlet pipe; 12. Outlet pipe; 2. Impeller disc; 21. Center sleeve; 22. Blades; 3. Center shaft; 4. Crushing cutter head; 5. Filter cartridge; 6. Transmission assembly; 61. Rear end cover; 62. Gear ring; 63. First gear; 64. Transmission rod; 65. Second gear; 66. Third gear. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with embodiments.

[0027] See also Figure 1-6 The utility model provides a centrifugal pump high-lift impeller, comprising a pump casing 1, wherein the inlet pipe 11 and the outlet pipe 12 are both gradually narrowed at one end close to the pump casing 1, and flange rings are fixed to the outer sides of the ends of the inlet pipe 11 and the outlet pipe 12 away from the pump casing 1;

[0028] Specifically, the gradually narrowing inlet pipe 11 helps to smoothly guide the fluid into and out of the pump casing 1, reducing turbulence and eddy currents of the fluid during entry or discharge, thereby reducing energy loss, and helping to improve the dynamic characteristics of the fluid inside the pump casing 1, allowing the fluid to enter the impeller disk 2 more evenly, thereby increasing the head and flow rate of the pump. The gradually narrowing discharge pipe 12 helps to release the fluid pressure again, and the provision of the flange ring helps to connect the inlet pipe 11 and the discharge pipe 12 to the pipeline.

[0029] Furthermore, an inlet pipe 11 is fixedly embedded in the middle of the front side of the pump housing 1, and the inlet pipe 11 is arranged opposite to the filter cartridge 5. A discharge pipe 12 is fixedly embedded in the edge of the pump housing 1, and the inlet direction of the discharge pipe 12 is arranged tangent to the inner wall of the pump housing 1.

[0030] Specifically, the inlet pipe 11 is arranged directly opposite the filter cartridge 5, which helps to guide the fluid directly into the area inside the filter cartridge 5, ensuring that the solid particles in the fluid are first processed by the crushing head 4 and then discharged through the filter holes of the filter cartridge 5. The design of the inlet pipe 11 helps to reduce the direct impact of large particles in the fluid on the impeller disc 2, thereby reducing the risk of clogging the impeller. The inlet direction of the discharge pipe 12 is arranged tangentially to the inner wall of the pump casing 1, which helps the fluid to be discharged more smoothly, reduces resistance, and improves the efficiency of the pump.

[0031] Further, a rotatable impeller disc 2 is installed in the middle of the rear wall of the pump housing 1, a center sleeve 21 is fixedly connected to the middle of the rear side of the impeller disc 2, and the center sleeve 21 is rotatably connected to the pump housing 1. A plurality of blades 22 are fixed equidistantly on the front side of the impeller disc 2 and located outside the filter cartridge 5, and the blades 22 are in an arc-shaped structure, and the gaps between adjacent blades 22 gradually increase from the center sleeve 21 outwards;

[0032] Specifically, the arc-shaped blades 22 help to more effectively guide the fluid to enter from the axial direction and transform into radial flow, thereby improving the kinetic energy of the fluid and the efficiency of the pump. The gap between the blades 22 gradually increases from the center sleeve 21 to the outside, which helps to distribute the fluid more evenly on the impeller disk 2, reduce turbulence and eddies, and improve the flow efficiency of the fluid. It can reduce the impact of the fluid on the blades 22, reduce noise and vibration, and make the pump run more smoothly. It helps to accelerate the fluid from the center of the impeller to the edge, increase the flow rate and pressure of the fluid, thereby improving the pump head. This blade 22 design can adapt to media containing solid particles, allowing solid particles to pass smoothly through the gaps in the blades 22, reducing wear.

[0033] Furthermore, a central shaft 3 is rotatably embedded in the middle of the impeller disc 2, one end of the central shaft 3 extends to the pump housing 1 and a crushing cutter head 4 is fixed therein, a filter cartridge 5 is fixedly connected to the outside of the crushing cutter head 4 and located on the front wall of the pump housing 1, the filter cartridge 5 is densely covered with filter holes, and the filter cartridge 5 is rotatably connected to the impeller disc 2;

[0034] Specifically, the filter cartridge 5 can prevent larger substances from entering the interior of the pump, reduce the possibility of pump blockage, and ensure the continuous and stable operation of the pump. The filter cartridge 5 and the impeller disk 2 are connected by a sealed bearing, which can prevent uncrushed substances from escaping from the gap between the filter cartridge 5 and the impeller disk 2.

[0035] Further, a transmission assembly 6 is transmission-connected between the impeller disc 2 and the central shaft 3, and the transmission assembly 6 includes a rear end cover 61 fixed to the rear side of the pump casing 1, a gear ring 62 fixed to the outer side of the end of the central sleeve 21, a first gear 63 fixed to the outer wall of the central shaft 3, and a transmission rod 64 rotatably embedded between the rear end cover 61 and the rear wall of the pump casing 1, and one end of the central shaft 3 away from the crushing cutter head 4 passes through the rear end cover 61, and the outer fixed sleeve of the transmission rod 64 is provided with a second gear 65 and a third gear 66, wherein the second gear 65 is meshingly connected with the first gear 63, and the third gear 66 is meshingly connected with the gear ring 62;

[0036] Specifically, the servo motor drives the central shaft 3 to rotate, the central shaft 3 drives the first gear 63 to rotate, the first gear 63 reduces the speed of the second gear 65, the second gear 65 rotates coaxially with the third gear 66, so that the third gear 66 can reduce the speed of the gear ring 62, the gear ring 62 drives the impeller disk 2 to rotate at a high speed, and the blades 22 on the impeller disk 2 centrifugally throw out the water.

[0037] Further, the radius of the second gear 65 is greater than the radius of the first gear 63, and the radius of the third gear 66 is smaller than the radius of the gear ring 62;

[0038] Specifically, when the servo motor drives the central shaft 3 to rotate, the first gear 63 rotates. Since the second gear 65 has a larger radius, the power reduction can be transmitted to the second gear 65. Then the second gear 65 further transmits the power reduction to the third gear 66 by coaxially rotating with the third gear 66. The crushing head 4 can maintain a high speed at a lower impeller disk 2 speed to achieve effective crushing, and a compact mechanical structure can be achieved to reduce space occupancy.

[0039] Working principle: When in use, the servo motor drives the central shaft 3 to rotate, the central shaft 3 drives the first gear 63 to rotate, the first gear 63 reduces the speed of the second gear 65, the second gear 65 rotates coaxially with the third gear 66, so that the third gear 66 can reduce the speed of the gear ring 62, the gear ring 62 drives the impeller disk 2 to rotate at a high speed, the blades 22 on the impeller disk 2 centrifuge the water, and the water is discharged outward through the discharge pipe 12, at the same time, the central shaft 3 drives the crushing cutter head 4 to rotate at a high speed, the crushing cutter head 4 can crush the material in the filter cartridge 5, so that the material can pass through the filter hole, avoiding the possibility of clogging of the centrifugal pump, fully ensuring the safe operation of the centrifugal pump, and improving the head of the centrifugal pump.

Claims

1. A centrifugal pump high-lift impeller, comprising a pump casing (1), characterized in that: A rotatable impeller disc (2) is installed in the middle of the rear wall of the pump casing (1), a central shaft (3) is rotatably embedded in the middle of the impeller disc (2), one end of the central shaft (3) extends into the pump casing (1) and is fixed with a crushing blade head (4), a filter cartridge (5) is fixedly connected to the outside of the crushing blade head (4) and located on the front wall of the pump casing (1), and a transmission assembly (6) is transmission-connected between the impeller disc (2) and the central shaft (3).

2. A centrifugal pump high-lift impeller according to claim 1, characterized in that: A center sleeve (21) is fixedly connected to the middle of the rear side of the impeller disc (2), and the center sleeve (21) is rotatably connected to the pump housing (1). A plurality of blades (22) are fixed equidistantly on the front side of the impeller disc (2) and located on the periphery of the filter cartridge (5). The blades (22) are in an arc-shaped structure, and the gaps between adjacent blades (22) gradually increase from the center sleeve (21) outwards.

3. A centrifugal pump high-lift impeller according to claim 1, characterized in that: The transmission assembly (6) comprises a rear end cover (61) fixed to the rear side of the pump housing (1), a toothed ring (62) fixed to the outer side of the end of the center sleeve (21), a first gear (63) fixed to the outer wall of the center shaft (3), and a transmission rod (64) rotatably embedded between the rear end cover (61) and the rear wall of the pump housing (1), wherein one end of the center shaft (3) away from the crushing cutter head (4) passes through the rear end cover (61), and a second gear (65) and a third gear (66) are provided on the outer fixed sleeve of the transmission rod (64), wherein the second gear (65) is meshingly connected to the first gear (63), and the third gear (66) is meshingly connected to the toothed ring (62).

4. A high-lift impeller for a centrifugal pump according to claim 3, characterized in that: The radius of the second gear (65) is greater than the radius of the first gear (63), and the radius of the third gear (66) is smaller than the radius of the gear ring (62).

5. The high-lift impeller of a centrifugal pump according to claim 1, characterized in that: An inlet pipe (11) is fixedly embedded in the middle of the front side of the pump housing (1), and the inlet pipe (11) is arranged opposite to the filter cartridge (5). A discharge pipe (12) is fixedly embedded in the edge of the pump housing (1), and the inlet direction of the discharge pipe (12) is arranged tangentially to the inner wall of the pump housing (1).

6. A high-lift impeller for a centrifugal pump according to claim 5, characterized in that: The ends of the inlet pipe (11) and the outlet pipe (12) close to the pump casing (1) are both gradually narrowed, and flange rings are fixed to the outer sides of the ends of the inlet pipe (11) and the outlet pipe (12) away from the pump casing (1).

7. The high-lift impeller of a centrifugal pump according to claim 1, characterized in that: The filter cartridge (5) is densely covered with filter holes, and the filter cartridge (5) is rotatably connected to the impeller disk (2).

Images