Inclined axial flow pump with composite lubrication deviation prevention structure

Abstract

The application relates to the technical field of axial flow pumps, in particular to an inclined axial flow pump with a composite lubrication anti-deviation wear structure, which comprises a pump shaft and a pump body assembly, the pump shaft penetrates through the pump body assembly, a guide vane pipe is arranged in the pump body assembly, a water guide bearing is rotatably arranged in the guide vane pipe, a harmonic reducer is arranged on the water guide bearing and is in transmission connection with the pump shaft through the harmonic reducer, an upper positioning ring is arranged in the guide vane pipe, and the upper positioning ring and the water guide bearing are provided with a power circulation mechanism which is matched with each other. The harmonic reducer is used for transmission and speed reduction, when the pump shaft is driven to rotate, the water guide bearing can be synchronously driven to rotate, the position of a bearing bush in the water guide bearing is periodically adjusted, local pressure concentration of the bearing bush is avoided, and wear aggravation is avoided; meanwhile, when the water guide bearing rotates, the power circulation mechanism can be synchronously driven to move, and lubricating and cooling medium is pushed to circularly flow in a lubricating and cooling flow channel of the water guide bearing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of axial flow pumps, in particular to an inclined axial flow pump with composite lubrication anti-deviation wear structure. BACKGROUND

[0002] The axial flow pump is a pump that relies on the force generated by the runner impeller to transport liquid along the axial direction. It is mainly composed of a pump body assembly, an impeller, a pump shaft, fixed guide vanes, guide bearings, a shaft coupling, and a driving motor. According to the different installation methods, it is mainly divided into vertical, horizontal, and inclined axial flow pumps. The pump shaft of the inclined axial flow pump is inclinedly installed relative to the installation surface, and the common inclination angles are 15°, 30°, and 45°. It combines the characteristics of vertical and horizontal pumps, and the pump body has a center-opening structure, which is convenient for maintenance. Moreover, the inlet and outlet water flow passages are less curved, and the hydraulic loss is lower.

[0003] For example, the patent with publication number CN202946402U discloses an inclined axial flow pump, which includes a driving motor connected to a water pump shaft through a shaft coupling. One end of the water pump shaft penetrates the water pump body to connect the impeller component. The water pump shaft forms an angle of 20-45 degrees with the horizontal plane. The inclined installation of the axial flow pump completely solves the low efficiency problem of the water pump at low lift. The use of appropriate hydraulic models can achieve an efficiency of more than 85% when the lift is 1.5-5 meters, which is at least 10 percentage points higher than the use of vertical pumps. At the same time, it solves a series of problems such as excessive excavation depth, excessive pump house height, increased supporting motor power, high cost, etc.

[0004] In the prior art of the above-mentioned patent, the pump shaft is inclinedly installed and positioned radially by the guide bearing to bear the radial force and reduce vibration. Lubrication is used to ensure smooth operation of the pump shaft. However, after the pump shaft is inclinedly installed, it is affected by the gravity of the pump shaft itself. Since the guide bearing is in a fixed state during operation, the load on the bearing bush below the guide bearing increases, causing the wear of the bearing bush below the guide bearing to be greater than that at other positions. Over time, the pump shaft may deviate, so there is an urgent need for an inclined axial flow pump with composite lubrication anti-deviation wear structure to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide an inclined axial flow pump with composite lubrication anti-deviation wear structure to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] An inclined axial flow pump with composite lubrication anti-deviation wear structure, comprising a pump shaft and a pump body assembly, the pump shaft penetrating the pump body assembly, the pump body assembly being internally provided with a guide vane pipe, the inside of the guide vane pipe being rotatably installed with a water guide bearing, and a harmonic reducer being provided on the water guide bearing and being in transmission connection with the pump shaft through the harmonic reducer.

[0008] The inside of the guide vane pipe is provided with an upper positioning ring, and the upper positioning ring and the water guide bearing are provided with a power circulation mechanism matched with each other, and the inner and outer surfaces of the water guide bearing are provided with lubricating and cooling flow channels;

[0009] When the pump shaft rotates, the water guide bearing is driven to rotate periodically through the harmonic reducer transmission, and the water guide bearing can drive the power circulation mechanism to act and drive the lubricating and cooling medium to circulate in the lubricating and cooling flow channels when the water guide bearing rotates.

[0010] Preferably, the inside of the pump body assembly is integrally provided with a guide vane body, the guide vane pipe is fixedly connected to the middle position of the guide vane body and is sleeved on the outside of the pump shaft.

[0011] Preferably, the bottom end of the guide vane pipe is provided with a lower shaft seal mechanism, and the water guide bearing is rotationally installed in the inside of the guide vane pipe through the lower shaft seal mechanism and the upper positioning ring.

[0012] Preferably, the water guide bearing comprises a bearing tube and a bearing bush fixedly sleeved, and the outer ring of the bearing tube is provided with an outer spiral groove, and the inner ring of the bearing bush is provided with an inner spiral groove.

[0013] Preferably, the top end of the bearing tube is provided with a water inlet ring groove communicated with the outer spiral groove, and the power circulation mechanism comprises a pressing block located at the top inlet of the outer spiral groove and inside the water inlet ring groove.

[0014] Preferably, the power circulation mechanism further comprises a sealing block provided on the upper positioning ring and capable of being clamped into the water inlet ring groove, and the space between the pressing block and the sealing block is reduced when the bearing tube rotates, so that the lubricating and cooling medium between the pressing block and the sealing block is pressed into the outer spiral groove.

[0015] Preferably, the power circulation mechanism further comprises a locking assembly for locking the position of the sealing block when the lubricating and cooling medium is pressed, and the locking assembly is actuated by the pressing block when the bearing tube drives the pressing block to rotate, so as to release the locking of the sealing block.

[0016] Preferably, the bearing tube and the bearing bush are provided with a flow hole one matched with each other at the end away from the power circulation mechanism, for connecting the outer spiral groove and the inner spiral groove, and the bearing tube is provided with a flow hole two at the end close to the power circulation mechanism, and the flow hole two is communicated with the inner spiral groove.

[0017] Preferably, the guide vane pipe, the guide vane body and the pump body assembly are all provided with a water inlet flow channel and a backwater flow channel, the water inlet flow channel is communicated with the water inlet ring groove, and the backwater flow channel is communicated with the flow hole two.

[0018] Preferably, the lower shaft sealing mechanism comprises a lower rubber bushing sleeved on the outside of the pump shaft, and a pressurized portion capable of sealing the pump shaft is arranged in the middle of the lower rubber bushing.

[0019] In the above technical solution, the beneficial effects of the present application are as follows: through the transmission and deceleration of the harmonic reducer, the water guide bearing can be synchronously driven to rotate when the pump shaft is driven to rotate, so as to periodically adjust the position of the bushing in the water guide bearing, thereby avoiding the local pressure concentration of the bushing and the accelerated wear; meanwhile, the water guide bearing can synchronously drive the power circulation mechanism to move when rotating, so as to push the lubricating and cooling medium to circulate in the lubricating and cooling flow channel of the water guide bearing, thereby realizing the lubrication and cooling between the pump shaft and the water guide bearing, and reducing the difficulty of arranging the lubricating and cooling system.

[0020] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory, rather than being intended to limit the present disclosure.

[0021] This application file provides an overview of various implementations or examples of the technology described in this disclosure and is not intended to be all inclusive or to provide an exhaustive list of features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0023] Figure 1 It is a structural schematic diagram of the overall combination of the present application;

[0024] Figure 2 It is a structural schematic diagram of the cross section of the pump body assembly of the present application;

[0025] Figure 3 It is a structural schematic diagram of the upper part inside the main pipe body section of the present application;

[0026] Figure 4 It is a structural schematic diagram of the lower part inside the main pipe body section of the present application;

[0027] Figure 5 It is a structural schematic diagram of the cross section of the guide vane pipe of the present application;

[0028] Figure 6 It is a structural schematic diagram of the installation position of the power circulation mechanism of the present application;

[0029] Figure 7 It is a structural schematic diagram of the cooperation of the sealing block and the locking assembly of the present application;

[0030] Figure 8Structure schematic diagram of water guide bearing section of the present application;

[0031] Figure 9 Structure schematic diagram of bottom of upper positioning ring of the present application;

[0032] Figure 10 Structure schematic diagram of water guide bearing of the present application;

[0033] Figure 11 Structure schematic diagram of lower shaft sealing mechanism of the present application;

[0034] Figure 12 Structure schematic diagram of upper shaft sealing mechanism of the present application;

[0035] Figure 13 Structure schematic diagram of A of the present application Figure 8 enlarged structure schematic diagram.

[0036] Explanation of reference signs:

[0037] In the figure: 1, main pipe body section; 2, elbow pipe section; 3, water outlet connecting section; 4, mounting seat; 5, pump shaft; 6, axial flow impeller; 7, guide vane pipe; 8, guide vane body; 9, bearing pipe; 10, outer spiral groove; 11, water inlet ring groove; 12, power circulation mechanism; 121, extrusion block; 122, sealing block; 123, elastic reset rod one; 124, extrusion sliding table; 125, adjusting sliding table; 126, elastic reset rod two; 127, positioning baffle; 128, locking insertion rod; 13, upper positioning ring; 14, bearing; 15, inner spiral groove; 16, lower shaft sealing mechanism; 161, lower positioning ring; 162, lower rubber shaft sleeve; 1621, pressure increasing part; 163, lower mounting pressing plate; 17, upper shaft sealing mechanism; 171, upper mounting ring; 172, upper rubber shaft sleeve; 173, upper mounting pressing plate; 18, harmonic reducer; 19, water inlet ring pipe; 20, water return ring pipe; 21, horn mouth section. DETAILED DESCRIPTION

[0038] To make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any creative effort fall within the protection scope of the present disclosure.

[0039] Please refer to Figures 1-13The embodiment of the present application provides a technical scheme: a diagonal axial flow pump with a composite lubrication anti-deviation wear structure, comprising a pump shaft 5 and a pump body assembly, the pump shaft 5 penetrates through the pump body assembly, a guide vane pipe 7 is arranged inside the pump body assembly, a water guide bearing is rotatably installed inside the guide vane pipe 7, a harmonic reducer 18 is arranged on the water guide bearing, and the harmonic reducer 18 is in transmission connection with the pump shaft 5;

[0040] An upper positioning ring 13 is arranged inside the guide vane pipe 7, and the upper positioning ring 13 and the water guide bearing are provided with a power circulation mechanism 12 that cooperates with each other, and the inner and outer surfaces of the water guide bearing are provided with lubricating and cooling flow channels;

[0041] When the pump shaft 5 rotates, the harmonic reducer 18 can drive the water guide bearing to rotate periodically, and when the water guide bearing rotates, the power circulation mechanism 12 can be driven to act, and the lubricating and cooling medium can be driven to circulate in the lubricating and cooling flow channels.

[0042] The pump body assembly comprises a main pipe body section 1, the top end of the main pipe body section 1 is sequentially fixedly provided with a bend pipe section 2 and a water outlet connecting section 3, the bottom end is fixedly provided with a horn section 21, the water outlet connecting section 3 is provided with a mounting seat 4, the pump shaft 5 is rotatably installed on the mounting seat 4, one end of the pump shaft 5 located outside the pump body assembly is connected with a shaft coupling, and the other end located inside the pump body assembly is connected with an axial flow impeller 6;

[0043] The harmonic reducer 18 is composed of a wave generator, a flexible gear and a rigid gear, the wave generator is fixedly sleeved on the pump shaft 5, the rigid gear is fixedly installed on the water guide bearing, when the pump shaft 5 is driven to rotate, the wave generator is driven to rotate synchronously, and the flexible gear is driven to rotate, thereby driving the rigid gear and the water guide bearing to rotate;

[0044] Specifically, the pump shaft 5 is driven to rotate by a driving mechanism in the prior art to drive the axial flow impeller 6 to rotate to transport water; when the pump shaft 5 is driven to rotate, the water guide bearing is driven to rotate synchronously through the transmission and speed reduction of 81, the position of the bearing bush 14 in the water guide bearing is periodically adjusted, the influence of the inclined installation of the pump shaft 5 on the bearing bush 14 is avoided, the pressure concentration under the bearing bush 14 is avoided, and the abrasion is avoided; when the water guide bearing rotates, the power circulation mechanism 12 is driven to act synchronously, the lubricating and cooling medium is extruded into the lubricating and cooling flow channels of the water guide bearing, and in the continuous rotation, the lubricating and cooling medium is driven to circulate, thereby lubricating and cooling between the pump shaft 5 and the water guide bearing.

[0045] Compared with the prior art, the application is driven and decelerated by the harmonic reducer 18, and when the pump shaft 5 is driven to rotate, the water guide bearing can be synchronously driven to rotate, and the position of the bearing bush 14 in the water guide bearing is periodically adjusted, so that the local pressure concentration of the bearing bush 14 is avoided to cause the wear to be aggravated; meanwhile, when the water guide bearing rotates, the power circulation mechanism 12 is synchronously driven to act, and the lubricating and cooling medium is pushed to circulate and flow in the lubricating and cooling flow channel of the water guide bearing, so that the lubrication and cooling between the pump shaft 5 and the water guide bearing are realized, and the difficulty of arrangement of the lubricating and cooling system is reduced.

[0046] As the preferred technical scheme of the embodiment, the inside of the pump body assembly is integrally provided with the guide vane body 8, the guide vane pipe 7 is fixedly connected to the middle position of the guide vane body 8 and is sleeved on the outside of the pump shaft 5, and specifically, the guide vane body 8 is located in the inside of the main pipe body section 1, the rotational movement of the liquid carried at the outlet of the axial flow impeller 6 is converted into axial movement, the energy loss caused by rotation is reduced, the rotational movement is eliminated, part of the kinetic energy of the liquid is converted into pressure energy at the same time, and thus the overall efficiency of the pump is improved.

[0047] As the preferred technical scheme of the embodiment, the bottom end of the guide vane pipe 7 is provided with the lower shaft sealing mechanism 16, the water guide bearing is limited by the lower shaft sealing mechanism 16 and the upper positioning ring 13 and is rotatably installed in the inside of the guide vane pipe 7, and specifically, the position of the water guide bearing is limited by the upper positioning ring 13 in combination with the lower shaft sealing mechanism 16, the stability of the axial position of the water guide bearing in the inside of the guide vane pipe 7 is ensured, and thus the stable rotation of the water guide bearing in the inside of the guide vane pipe 7 is ensured.

[0048] As the preferred technical scheme of the embodiment, the water guide bearing includes the fixedly sleeved bearing pipe 9 and the bearing bush 14, the outer ring of the bearing pipe 9 is provided with the outer spiral groove 10, and the inner ring of the bearing bush 14 is provided with the inner spiral groove 15, and specifically, the outer spiral groove 10 of the outer ring of the bearing pipe 9 and the inner spiral groove 15 of the inner ring of the bearing bush 14 jointly form the lubricating and cooling flow channel, the bearing pipe 9 synchronously drives the power circulation mechanism 12 to act when rotating, and thus the lubricating and cooling medium is driven to circulate and flow in the outer spiral groove 10 and the inner spiral groove 15, so that the positions, at which the bearing bush 14 and the pump shaft 5 are in contact and the bearing pipe 9 and the guide vane pipe 7 are in contact, are lubricated and cooled.

[0049] As the preferred technical scheme of the embodiment, the top end of the bearing pipe 9 is provided with a water inlet ring groove 11 communicated with the outer spiral groove 10, and the power circulation mechanism 12 comprises a pressing block 121 located at the top inlet of the outer spiral groove 10 and inside the water inlet ring groove 11. Specifically, the lubricating and cooling medium enters the water inlet ring groove 11 along the water inlet channel, and when the bearing pipe 9 rotates, the pressing block 121 is driven to rotate synchronously. The outer wall of the bearing pipe 9 is attached to the inner wall of the guide vane pipe 7, and the space between the pressing block 121 and the sealing block 122 gradually decreases during the rotation of the pressing block 121, so as to extrude the lubricating and cooling medium in the water inlet ring groove 11 between the pressing block 121 and the sealing block 122 into the outer spiral groove 10, thereby providing power for the circulation of the lubricating and cooling medium.

[0050] As the preferred technical scheme of the embodiment, the power circulation mechanism 12 further comprises a sealing block 122 arranged on the upper positioning ring 13 and capable of being clamped into the water inlet ring groove 11. When the bearing pipe 9 rotates, the space between the pressing block 121 and the sealing block 122 decreases, so as to press the lubricating and cooling medium between the pressing block 121 and the sealing block 122 into the outer spiral groove 10. Specifically, the power circulation mechanism 12 further comprises an elastic reset rod 123 fixedly connected to the top of the sealing block 122 and movably installed on the upper positioning ring 13. The elastic reset rod 123 applies an elastic force to the sealing block 122, so that the bottom of the sealing block 122 can be attached to the bottom of the water inlet ring groove 11, thereby sealing the space between the pressing block 121 and the sealing block 122 and extruding the lubricating and cooling medium into the outer spiral groove 10. The top of the pressing block 121 and the bottom of the sealing block 122 are provided with inclined surfaces matched with each other. During the continuous rotation of the pressing block 121, the pressing block 121 can move upward by extruding the sealing block 122 through the inclined surfaces, thereby providing space for the rotation of the pressing block 121.

[0051] As the preferred technical scheme of the embodiment, the power circulation mechanism 12 further comprises a locking assembly for locking the position of the sealing block 122 when the lubricating and cooling medium is extruded, and when the bearing pipe 9 drives the extrusion block 121 to rotate, the extrusion block 121 can drive the locking assembly to act to release the locking of the sealing block 122. It needs to be noted that, since the extrusion block 121 extrudes the lubricating and cooling medium into the outer spiral groove 10 during rotation, the pressure of the lubricating and cooling medium between the extrusion block 121 and the sealing block 122 will increase. In order to avoid that the sealing block 122 is opened under the action of the pressure during the extrusion stage, the locking assembly is arranged to lock the position of the sealing block 122 during the extrusion stage. The locking assembly comprises a second elastic reset rod 126 movably installed on the upper positioning ring 13, the bottom end of the second elastic reset rod 126 is fixedly connected with an extrusion sliding table 124, the top of the extrusion sliding table 124 is clamped with an adjusting sliding table 125, the side of the adjusting sliding table 125 close to the sealing block 122 is fixedly connected with a locking plug rod 128, the upper positioning ring 13 is fixedly connected with a positioning baffle 127, and the top of the extrusion sliding table 124 and the bottom of the adjusting sliding table 125 are provided with inclined surfaces matched with each other. When the extrusion block 121 rotates to extrude the lubricating and cooling medium, the extrusion block 121 gradually moves to the side close to the sealing block 122, the extrusion block 121 is in advance in contact with the extrusion sliding table 124, the extrusion of the extrusion sliding table 124 overcomes the elastic force of the second elastic reset rod 126 to move upward, the extrusion sliding table 124 pushes the adjusting sliding table 125 to drive the locking plug rod 128 to move away from the sealing block 122, so that the locking plug rod 128 is separated from the sealing block 122, the locking of the position of the sealing block 122 is released, the extrusion block 121 continues to move to press the sealing block 122 to move upward, and finally the extrusion block 121 passes the position of the sealing block 122, the extrusion block 121 continues to cooperate with the sealing block 122 behind to realize the continuous power supply for the flow of the lubricating and cooling medium.

[0052] As the preferred technical scheme of the embodiment, the bearing pipe 9 and the bearing bush 14 away from the power circulation mechanism 12 are provided with flow holes one matched with each other for connecting the outer spiral groove 10 and the inner spiral groove 15. The end of the bearing pipe 9 close to the power circulation mechanism 12 is provided with a flow hole two, and the flow hole two can communicate with the inner spiral groove 15. Specifically, the lubricating and cooling medium extruded into the outer spiral groove 10 can pass through the flow hole one into the inner spiral groove 15, and enter the flow hole two along the top end of the inner spiral groove 15, so that the lubricating and cooling medium can flow circularly under the drive of the power circulation mechanism 12.

[0053] As a preferred technical scheme of the embodiment, the guide vane pipe 7, the guide vane body 8 and the pump body assembly are all provided with a water inlet flow channel and a backwater flow channel; the water inlet flow channel is communicated with the water inlet annular groove 11; the backwater flow channel is communicated with the flow hole two; specifically, the bottom of the upper positioning ring 13 is provided with an annular flow channel, and the top is provided with a flow hole three; the backwater flow channel is communicated with the flow hole two through the annular flow channel and the flow hole three; the outer portion of the main pipe body section 1 is fixedly sleeved with a water inlet ring pipe 19 and a backwater ring pipe 20; the water inlet ring pipe 19 is communicated with the water inlet flow channel; the backwater ring pipe 20 is communicated with the backwater flow channel; it needs to be further explained that, in order to realize the storage and cooling of the lubricating cooling medium, the water inlet ring pipe 19 and the backwater ring pipe 20 are further connected with a storage tank and a cooler through a pipeline; in order to ensure the correctness of the flow direction of the lubricating cooling medium, a one-way valve is arranged on the pipeline; the storage tank and the cooler are common prior art, which are not shown in the drawing of the application.

[0054] In still another embodiment of the application, the lower shaft sealing mechanism 16 includes a lower rubber shaft sleeve 162, which is sleeved on the outer portion of the pump shaft 5, and the middle portion of the lower rubber shaft sleeve 162 is provided with a pressurizing portion 1621 capable of sealingly contacting the pump shaft 5; specifically, the lower positioning ring 161 and the lower mounting pressing plate 163 are fixedly mounted on the bottom of the guide vane pipe 7 through bolts, the lower rubber shaft sleeve 162 is press-fitted between the lower positioning ring 161 and the lower mounting pressing plate 163, and the lower rubber shaft sleeve 162 is sleeved on the outer portion of the pump shaft 5; the pump shaft 5 is sleeved with the upper shaft sealing mechanism 17 located above the bearing bush 14; the upper shaft sealing mechanism 17 includes an upper mounting ring 171, an upper rubber shaft sleeve 172 and an upper mounting pressing plate 173; when the rigid wheel of the harmonic reducer 18 is installed, the upper mounting ring 171 is fixedly mounted on the bearing pipe 9 at the same time, the upper mounting pressing plate 173 is fixedly mounted on the upper mounting ring 171 through bolts, the upper rubber shaft sleeve 172 is press-fitted between the upper mounting ring 171 and the upper mounting pressing plate 173, and the upper rubber shaft sleeve 172 is sleeved on the outer portion of the pump shaft 5; the middle portion of the upper rubber shaft sleeve 172 is also provided with a pressurizing portion 1621 capable of sealingly contacting the pump shaft 5; it needs to be explained that, after the lubricating cooling medium enters the inner spiral groove 15, since the top and the bottom of the inner spiral groove 15 are both in an open state, the lubricating cooling medium can exert a static pressure on the pressurizing portion 1621 of the lower rubber shaft sleeve 162 and the upper rubber shaft sleeve 172 close to the bearing bush 14, thereby improving the sealing effect of the pump shaft 5 at the position not connected with the water guide bearing at both ends; it needs to be further explained that, the diameter of the flow hole one gradually increases from the bearing pipe 9 to the bearing bush 14, and the cross-sectional area of the outer spiral groove 10 is smaller than that of the inner spiral groove 15; according to Bernoulli's equation, when the lubricating cooling medium enters the inner spiral groove 15 along the outer spiral groove 10, the flow rate decreases and the static pressure increases, thereby further improving the static pressure exerted by the lubricating cooling medium on the pressurizing portion 1621.

[0055] The foregoing merely illustrates some exemplary embodiments of the application, and it will be appreciated that those skilled in the art will be able to devise various modifications without departing from the spirit and scope of the application. The appended drawings and description are illustrative only, and are not intended to be limiting.

Claims

1. A mixed flow pump with composite lubrication anti-deformation structure, comprising a pump shaft (5) and a pump body assembly, the pump shaft (5) penetrating through the pump body assembly, and a guide vane pipe (7) being arranged inside the pump body assembly, characterized in that, The guide vane tube (7) is internally fitted with a water guide bearing, and a harmonic reducer (18) is installed on the water guide bearing, and is connected to the pump shaft (5) through the harmonic reducer (18). The guide vane tube (7) is provided with an upper positioning ring (13) inside, and the upper positioning ring (13) and the water guide bearing are provided with a power circulation mechanism (12) that cooperates with each other. The inner and outer surfaces of the water guide bearing are provided with lubrication and cooling channels. When the pump shaft (5) rotates, it can drive the water guide bearing to rotate periodically through the harmonic reducer (18). When the water guide bearing rotates, it can drive the power circulation mechanism (12) to operate and drive the lubricating and cooling medium to circulate in the lubricating and cooling channel. The water-guided bearing includes a fixedly fitted bearing tube (9) and a bearing bush (14). The outer ring of the bearing tube (9) is provided with an outer spiral groove (10), and the inner ring of the bearing bush (14) is provided with an inner spiral groove (15). The top end of the bearing tube (9) is provided with a water inlet ring groove (11) that communicates with the outer spiral groove (10). The power circulation mechanism (12) includes a pressing block (121), which is located at the top inlet of the outer spiral groove (10) and inside the water inlet ring groove (11). The power circulation mechanism (12) also includes a sealing block (122), which is set on the upper positioning ring (13) and can be snapped into the water inlet ring groove (11). When the bearing tube (9) rotates, the space between the extrusion block (121) and the sealing block (122) is reduced, which can press the lubricating and cooling medium between the extrusion block (121) and the sealing block (122) into the outer spiral groove (10). The power circulation mechanism (12) also includes an elastic reset rod (123), which is fixedly connected to the top of the sealing block (122) and movably installed on the upper positioning ring (13). The top of the extrusion block (121) and the bottom of the sealing block (122) are provided with mutually cooperating inclined surfaces. The bearing tube (9) and the bearing bush (14) are provided with a flow hole 1 at the end away from the power circulation mechanism (12) to connect the outer spiral groove (10) and the inner spiral groove (15); the bearing tube (9) is provided with a flow hole 2 at the end near the power circulation mechanism (12), and the flow hole 2 can connect with the inner spiral groove (15).

2. The inclined axial flow pump with the composite lubrication anti-eccentric wear structure according to claim 1, characterized in that, The pump body assembly has an integrally integrated guide vane body (8), and the guide vane tube (7) is fixedly connected to the middle position of the guide vane body (8) and fitted onto the outside of the pump shaft (5).

3. The inclined axial flow pump with the composite lubrication anti-eccentric wear structure according to claim 1, characterized in that, The bottom end of the guide vane tube (7) is provided with a lower shaft seal mechanism (16), and the water guide bearing is rotatably installed inside the guide vane tube (7) by being restricted by the lower shaft seal mechanism (16) and the upper positioning ring (13).

4. The inclined axial flow pump with the composite lubrication anti-eccentric wear structure according to claim 1, characterized in that, The power circulation mechanism (12) also includes a locking component, which is used to lock the position of the sealing block (122) when the lubricating cooling medium is squeezed. When the bearing tube (9) drives the squeezing block (121) to rotate, the squeezing block (121) can drive the locking component to release the lock on the sealing block (122).

5. The inclined axial flow pump with the composite lubrication anti- eccentric wear structure according to claim 1, characterized in that, The guide vane pipe (7), guide vane body (8) and pump body assembly are all provided with inlet water channels and return water channels. The inlet water channel is connected to the inlet water ring groove (11), and the return water channel is connected to the flow passage hole 2.

6. A slanted axial flow pump with a composite lubrication and anti-wear structure according to claim 3, characterized in that, The lower shaft seal mechanism (16) includes a lower rubber bushing (162), which is fitted onto the outside of the pump shaft (5), and a pressure boosting part (1621) is provided in the middle of the lower rubber bushing (162) to seal the pump shaft (5).

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