A long-life axial flow pump

Abstract

The present invention provides a long-life axial flow pump, comprising: a tube body, a rotating shaft assembly, and a blade assembly; one end of the rotating shaft assembly is arranged on the central axis of the straight tube, and the other end penetrates the side wall of the curved tube and protrudes out of the tube body; the blade assembly is arranged at one end of the rotating shaft assembly located on the straight tube; the rotating shaft assembly comprises: a guide vane, a transmission shaft, and a protective shaft; one end of the transmission shaft is fixedly connected to the blade assembly, and the other end protrudes out of the tube body; the protective shaft sleeve is arranged on the outside of the transmission shaft, and there is a gap between the protective shaft and the transmission shaft, and a plurality of bearings are evenly arranged between the protective shaft and the transmission shaft; an oil inlet is arranged on the side of one end of the protective shaft protruding out of the tube body; the guide vane is fixedly arranged on the outer periphery of the protective shaft near the blade assembly. The long-life axial flow pump of the present invention adopts a protective shaft sleeve arranged on the transmission shaft to separate the transmission shaft from water, which prevents repeated scouring of water on the one hand, and protects the transmission shaft from long-term erosion of water on the other hand; thereby improving the service life of the transmission shaft.

Description

Technical Field

[0001] The invention relates to the technical field of axial flow pumps, and in particular to a long-life axial flow pump. Background Art

[0002] At present, axial flow pumps are used as low-lift and high-flow water pumps. Due to their actual use, their transmission shafts are relatively long. The part of the transmission shaft that passes through the pipe body does not have any supporting components. The transmission shaft is in high-speed operation for a long time. Due to the reaction force of the water flow, the transmission shaft is subjected to high-intensity scouring and is prone to damage. Summary of the invention

[0003] One of the purposes of the present invention is to provide a long-life axial flow pump, which adopts a protective sleeve arranged on the transmission shaft to protect the transmission shaft and separate the transmission shaft from water. On the one hand, it prevents repeated scouring by water, and on the other hand, it protects the transmission shaft from long-term erosion by water; thereby increasing the service life of the transmission shaft.

[0004] An embodiment of the present invention provides a long-life axial flow pump, comprising: a tube body, a rotating shaft assembly, and a blade assembly; one end of the tube body is a curved tube, and the other end is a straight tube; one end of the rotating shaft assembly is arranged on the central axis of the straight tube, and the other end passes through the side wall of the curved tube and protrudes out of the tube body; the blade assembly is arranged at one end of the rotating shaft assembly located on the straight tube; the rotating shaft assembly comprises: a guide vane, a transmission shaft and a protective shaft; one end of the transmission shaft is fixedly connected to the blade assembly, and the other end protrudes out of the tube body; the protective shaft sleeve is arranged on the outside of the transmission shaft, and there is a gap between the protective shaft and the transmission shaft, and a plurality of bearings are evenly arranged between the protective shaft and the transmission shaft; one end of the protective shaft is sealedly connected to the blade assembly, and the other end is fixedly connected to the curved tube; one end of the protective shaft protruding out of the tube body is sealedly connected to one end of the transmission shaft protruding out of the tube body; an oil inlet is arranged on the side of the end of the protective shaft protruding out of the tube body; the guide vane is fixedly arranged on the outer periphery of the protective shaft close to the blade assembly.

[0005] Preferably, a support assembly is provided in the middle of the tube body, and the support assembly is sleeved on the outer circumference of the protection shaft.

[0006] Preferably, the support assembly comprises: a support ring, a plurality of connecting members and a plurality of limiting devices;

[0007] The support ring is set outside the protection shaft, and the limit device is set on the inner periphery of the support ring and located between the protection shaft and the support ring; one end of the connecting piece is fixed to the outer periphery of the support ring, and the other end is fixedly connected to the inner wall of the tube body.

[0008] Preferably, the connecting piece is parallel to a tangent line of the outer circumference of the supporting ring.

[0009] Preferably, a first filter screen is provided between adjacent connecting members.

[0010] Preferably, the limiting device comprises:

[0011] The limiting plate is arc-shaped, and one side thereof is adapted to the outer peripheral shape of the protection shaft;

[0012] At least one spring has one end fixedly connected to the inner periphery of the support ring and the other end fixedly connected to the limiting plate.

[0013] Preferably, the guide vane and the protective shaft are made in one piece.

[0014] Preferably, a second filter screen is provided at one end of the tube body close to the blade assembly.

[0015] Preferably, the blade assembly comprises:

[0016] A connecting body, wherein a transmission shaft mounting hole is provided in the middle of the upper end surface, the inner wall of the transmission shaft mounting hole is provided with threads, and the outer periphery of one end of the transmission shaft connected to the blade assembly is provided with threads; the transmission shaft is installed in the transmission shaft mounting hole; the cross section of the lower end surface of the connecting body is an arc shape;

[0017] A plurality of blades, one end of the blade is fixedly connected to the connector; the other end is provided with a plurality of unequal sawtooth grooves; one end of the blade connected to the connector is smaller than the end of the blade away from the connector; the blade is spiral.

[0018] Preferably, a plurality of first annular grooves are provided on the upper end surface of the connecting body, a plurality of second annular grooves are provided on the lower end surface of the protective shaft, an annular sealing gasket is provided between the connecting body and the protective shaft, the outer ring and the inner ring of the annular sealing gasket are respectively T-shaped, a first protrusion adapted to the first annular groove is provided on the lower end surface of the annular sealing gasket; a second protrusion adapted to the second annular groove is provided on the upper end surface of the annular sealing gasket.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 A schematic diagram of a long-life axial flow pump according to an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a support assembly of a long-life axial flow pump according to an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a blade assembly of a long-life axial flow pump according to an embodiment of the present invention;

[0025] Figure 4 The figure is a schematic diagram of the connection between a protective shaft and a connecting piece of a long-life axial flow pump in an embodiment of the present invention.

[0026] In the figure:

[0027] 1. Tube body; 2. Rotating shaft assembly; 3. Blade assembly; 4. Second filter; 5. Support assembly; 6. Oil inlet; 7. Bearing; 8. First filter; 9. Ring seal; 1-1. Bend pipe; 1-2. Straight pipe; 2-1. Protective shaft; 2-2. Guide vane; 2-3. Drive shaft; 3-1. Connector; 3-2. Blade; 3-3. Drive shaft mounting hole; 5-1. Limit device; 5-2. Support ring; 5-3. Connector; 5-11. Spring; 5-12. Limit plate. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] The embodiment of the present invention provides a long-life axial flow pump, such as Figure 1 As shown, it includes: a tube body 1, a shaft assembly 2, and a blade assembly 3; one end of the tube body 1 is a curved tube 1-1, and the other end is a straight tube 1-2; one end of the shaft assembly 2 is arranged on the central axis of the straight tube 1-2, and the other end passes through the side wall of the curved tube 1-1 and protrudes out of the tube body 1; the blade assembly 3 is arranged at one end of the shaft assembly 2 located at the straight tube 1-2; the shaft assembly 2 includes: a guide vane 2-2, a transmission shaft 2-3 and a protection shaft 2-1; one end of the transmission shaft 2-3 is fixedly connected to the blade assembly 3, and the other end protrudes out of the tube body 1; the protection shaft 2-1 is sleeved on the outside of the transmission shaft 2-3, and the protection shaft 2-1 There is a gap between the protection shaft 2-1 and the transmission shaft 2-3, and multiple bearings 7 are evenly arranged between the protection shaft 2-1 and the transmission shaft 2-3. The protection shaft 2-1 is rotationally connected to the transmission shaft 2-3 through multiple bearings 7; one end of the protection shaft 2-1 is sealed and connected to the blade assembly 3, and the other end is fixedly connected to the bent pipe 1-1; the end of the protection shaft 2-1 protruding from the tube body 1 is sealed and connected to the end of the transmission shaft 2-3 protruding from the tube body 1; an oil inlet 6 is arranged on the side of the end of the protection shaft 2-1 protruding from the tube body 1; the guide vane 2-2 is fixedly arranged on the outer periphery of the protection shaft 2-1 close to the blade assembly 3.

[0030] The working principle and beneficial effects of the above technical solution are:

[0031] At the same time, the protection shaft 2-1 is fixedly connected to the pipe body 1, providing a main support point for the transmission shaft 2-3, preventing the transmission shaft 2-3 from breaking due to the reaction force of the water body. The protection shaft 2-1 is sleeved on the transmission shaft 2-3 to separate the transmission shaft 2-3 from the water body, preventing repeated scouring by water on the one hand, and protecting the transmission shaft 2-3 from long-term erosion by water on the other hand, thereby increasing the service life of the transmission shaft 2-3.

[0032] A closed space is formed between the protection shaft 2-1 and the transmission shaft 2-3, and the closed space is filled with lubricating oil, so as to reduce the wear of the bearing 7 connected between the protection shaft 2-1 and the transmission shaft 2-3 and increase its service life.

[0033] In one embodiment, Figure 1 and Figure 2 As shown, a support assembly 5 is provided in the middle of the tube body 1, and the support assembly 5 is sleeved on the outer periphery of the protection shaft 2-1.

[0034] The support assembly 5 includes: a support ring 5-2, a plurality of connecting members 5-3 and a plurality of limiting devices 5-1;

[0035] The support ring 5-2 is sleeved outside the protection shaft 2-1, and the limit device 5-1 is arranged on the inner periphery of the support ring 5-2 and located between the protection shaft 2-1 and the support ring 5-2; one end of the connecting member 5-3 is fixed to the outer periphery of the support ring 5-2, and the other end is fixedly connected to the inner wall of the tube body 1.

[0036] The connecting member 5-3 is parallel to the tangent line of the outer circumference of the supporting ring 5-2.

[0037] A first filter screen 8 is arranged between adjacent connecting members 5 - 3 ; the first filter screen 8 is mainly used to prevent collision between debris and the blade assembly 3 during backflow.

[0038] The limiting device 5-1 comprises:

[0039] The limiting plate 5-12 is arc-shaped, and one side thereof is adapted to the outer peripheral shape of the protection shaft 2-1;

[0040] At least one spring 5-11 has one end fixedly connected to the inner periphery of the support ring 5-2 and the other end fixedly connected to the limit plate 5-12.

[0041] The working principle and beneficial effects of the above technical solution are:

[0042] The support assembly 5 supports the part of the protection shaft 2-1 in the pipe body 1 and provides a support point for it. The limit device 5-1 is used to reduce the vibration of the protection shaft 2-1 caused by the reaction of the water body; specifically, the limit plate 5-12 is in direct contact with the outer periphery of the protection shaft 2-1, converting the small swing into the elastic deformation of the spring 5-11, and then the spring 5-11 releases the elastic deformation to offset the opposite force.

[0043] In one embodiment, the guide vane 2-2 and the protective shaft 2-1 are made in one piece.

[0044] To prevent the blade assembly 3 from being damaged by the suction of large objects, Figure 1 As shown, in one embodiment, a second filter screen 4 is provided at one end of the tube body 1 close to the blade assembly 3 .

[0045] The working principle and beneficial effects of the above technical solution are:

[0046] The water inlet end is the end of the pipe body 1 close to the blade assembly 3. The first filter screen is arranged at the water inlet end to prevent the blade assembly 3 from being damaged by inhaling too large objects during the use of the axial flow pump and to ensure the service life of the axial flow pump.

[0047] In one embodiment, Figure 3 As shown, the blade assembly 3 includes:

[0048] The connecting body 3-1 has a transmission shaft mounting hole 3-3 in the middle of the upper end surface, the inner wall of the transmission shaft mounting hole 3-3 is provided with threads, and the outer periphery of one end of the transmission shaft 2-3 connected to the blade assembly 3 is provided with threads; the transmission shaft 2-3 is installed in the transmission shaft mounting hole 3-3; the cross section of the lower end surface of the connecting body 3-1 is an arc shape;

[0049] A plurality of blades 3-2, one end of the blade 3-2 is fixedly connected to the connector 3-1; the other end is provided with a plurality of unequal sawtooth grooves; one end of the blade 3-2 connected to the connector 3-1 is smaller than the end of the blade 3-2 away from the connector 3-1; the blade 3-2 is spiral.

[0050] The working principle and beneficial effects of the above technical solution are:

[0051] The blade 3-2 is provided with a sawtooth groove to cut the pumping vortex after the axial flow pump is started, so that it becomes countless small vortices, reducing the impact force of the water body on the rotating shaft assembly. The blade 3-2 is designed to be spiral to achieve better pumping power. The lower end surface of the connector 3-1 is set to be an arc shape, so that the water body is separated to both sides, further reducing the impact force of the water body on the rotating shaft assembly.

[0052] In one embodiment, Figure 4As shown, a plurality of first annular grooves are arranged on the upper end surface of the connecting body 3-1, a plurality of second annular grooves are arranged on the lower end surface of the protective shaft, an annular sealing gasket 9 is arranged between the connecting body 3-1 and the protective shaft, the outer ring and the inner ring of the annular sealing gasket 9 are respectively T-shaped, a plurality of first protrusions adapted to the first annular grooves are arranged on the lower end surface of the annular sealing gasket 9; a plurality of second protrusions adapted to the second annular grooves are arranged on the upper end surface of the annular sealing gasket 9.

[0053] The working principle and beneficial effects of the above technical solution are:

[0054] When the annular sealing gasket 9 is used to seal the protection shaft and the connector 3-1, the T-shaped inner and outer rings are just attached to the surfaces of the protection shaft and the connector 3-1, and the protrusions on the upper and lower surfaces are arranged in the annular groove at the connection part of the protection shaft and the connector 3-1; the protection shaft and the connector 3-1 are sealed by the annular sealing gasket 9. At this time, the lower half of the T-shaped inner ring of the annular sealing gasket 9 is located in an annular groove of the connector 3-1.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A long-life axial flow pump, comprising: A tube body (1), a rotating shaft assembly (2), and a blade assembly (3); one end of the tube body (1) is a curved tube (1-1), and the other end is a straight tube (1-2); one end of the rotating shaft assembly (2) is arranged on the central axis of the straight tube (1-2), and the other end passes through the side wall of the curved tube (1-1) and protrudes out of the tube body (1); the blade assembly (3) is arranged on the rotating shaft assembly (2) at one end of the straight tube (1-2); the rotating shaft assembly (2) comprises: a guide vane (2-2), a transmission shaft (2-3) and a protection shaft (2-1); one end of the transmission shaft (2-3) is fixedly connected to the blade assembly (3), and the other end protrudes from the tube body (1); the protection shaft (2-1) is sleeved on the transmission shaft (2) and the blade assembly (3) is fixedly connected to the blade assembly (3) ...1) and the blade assembly (3) is fixedly connected to the blade assembly (1) and the blade assembly (3) is fixedly connected to the blade assembly (1) and the blade assembly (3) is fixedly connected to the blade assembly (1) and the blade assembly (3) is fixedly connected to the blade assembly ( On the outside of the shaft (2-3), there is a gap between the protection shaft (2-1) and the transmission shaft (2-3), and a plurality of bearings (7) are evenly arranged between the protection shaft (2-1) and the transmission shaft (2-3); one end of the protection shaft (2-1) is sealedly connected to the blade assembly (3), and the other end is fixedly connected to the bent pipe (1-1); the end of the protection shaft (2-1) protruding outside the tube body (1) is sealedly connected to the end of the transmission shaft (2-3) protruding outside the tube body (1); an oil inlet (6) is arranged on the side of the end of the protection shaft (2-1) protruding outside the tube body (1); the guide vane (2-2) is fixedly arranged on the outer periphery of the protection shaft (2-1) close to the blade assembly (3); A support assembly (5) is arranged in the middle of the tube body (1), and the support assembly (5) is sleeved on the outer circumference of the protection shaft (2-1); The support assembly (5) comprises: a support ring (5-2), a plurality of connecting members (5-3) and a plurality of limiting devices (5-1); The support ring (5-2) is sleeved outside the protection shaft (2-1), and the limit device (5-1) is arranged on the inner periphery of the support ring (5-2) and is located between the protection shaft (2-1) and the support ring (5-2); one end of the connecting member (5-3) is fixed to the outer periphery of the support ring (5-2), and the other end is fixedly connected to the inner wall of the tube body (1); The connecting piece (5-3) is parallel to a tangent line of the outer circumference of the supporting ring (5-2); A first filter screen (8) is arranged between adjacent connecting members (5-3); The limiting device (5-1) comprises: The limiting plate (5-12) is arc-shaped, and one side surface thereof is adapted to the outer peripheral shape of the protection shaft (2-1); At least one spring (5-11) has one end fixedly connected to the inner circumference of the support ring (5-2) and the other end fixedly connected to the limiting plate (5-12).

2. The long-life axial flow pump according to claim 1, characterized in that: The guide vane (2-2) and the protection shaft (2-1) are manufactured as one piece.

3. The long-life axial flow pump according to claim 1, characterized in that: A second filter screen (4) is provided at one end of the tube body (1) close to the blade assembly (3).

4. The long-life axial flow pump according to claim 1, characterized in that: The blade assembly (3) comprises: A connecting body (3-1) is provided with a transmission shaft mounting hole (3-3) in the middle of the upper end surface, the inner wall of the transmission shaft mounting hole (3-3) is provided with a thread, and the outer periphery of one end of the transmission shaft (2-3) connected to the blade assembly (3) is provided with a thread; the transmission shaft (2-3) is installed in the transmission shaft mounting hole (3-3); the cross section of the lower end surface of the connecting body (3-1) is an arc shape; A plurality of blades (3-2) are provided, one end of which is fixedly connected to the connector (3-1); the other end is provided with a plurality of unequal sawtooth grooves; one end of the blade (3-2) connected to the connector (3-1) is smaller than one end of the blade (3-2) away from the connector (3-1); and the blade (3-2) is spiral-shaped.

5. The long-life axial flow pump according to claim 4, characterized in that: The upper end surface of the connecting body (3-1) is provided with a plurality of first annular grooves, the lower end surface of the protective shaft is provided with a plurality of second annular grooves, an annular sealing gasket (9) is provided between the connecting body (3-1) and the protective shaft, the outer ring and the inner ring of the annular sealing gasket (9) are respectively T-shaped, a first protrusion adapted to the first annular groove is provided on the lower end surface of the annular sealing gasket (9), and a second protrusion adapted to the second annular groove is provided on the upper end surface of the annular sealing gasket (9).

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