Self-balancing single-stage double-suction axially split pump

Abstract

The invention relates to the technical field of axially split pumps, and discloses a self-balancing single-stage double-suction axially split pump which comprises an axially split pump and a motor, the motor is connected with a pump shaft in the axially split pump, the impeller is used for being connected with the pump shaft, and the oil injection unit is arranged on the axially split pump and used for injecting lubricating oil into the area where the pump shaft is located. The oil injection unit comprises a locking assembly, an oil injection assembly and a fixing base. When lubricating oil injection work needs to be carried out, gas transmission work can be carried out in the other gas inlet nozzle, so that a second sealing seat moves towards a first rotary knob, a gap is formed between a driven rod and a second sealing block, and then lubricating oil can move to a fixing seat and a self-locking assembly from a second connecting seat; and finally, the water is injected into the area where the bearing and the pump shaft are located, so that the lubricating effect on the bearing and the pump shaft is achieved, the condition of dry grinding during rotation of the pump shaft is avoided, and smooth work of the axially split pump is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of split case pumps, in particular to a self-balancing single-stage double-suction split case pump. Background Art

[0002] The split case pump is also called a single-stage double-suction centrifugal pump. When working, the impeller is inside the pump casing and is directly driven by the motor. The liquid enters the pump through the bottom valve and the suction pipe, and is thrown out under the centrifugal force of the high-speed rotating impeller. A low-pressure area is formed in the center of the impeller, causing the liquid to continuously flow in and then be thrown out. The suction port and the discharge port are below the axis of the water pump, and the horizontal direction is perpendicular to the axis.

[0003] For example, a Chinese patent with authorization announcement number CN117685229B discloses a liquid-collecting heating split-center pump, comprising a pump body, wherein the liquid inlet end of the pump body is connected to a liquid inlet pipe, the liquid discharge end of the pump body is connected to a liquid outlet pipe, the outer wall of the pump body is fixedly connected to a support, and further comprises: a collecting structure arranged on the surface of the support for collecting the liquid remaining in the pump body, the collecting structure comprising a liquid collecting box fixedly mounted on the surface of the support, a partition for separating the internal space of the liquid collecting box, a first connecting tube and a second connecting tube for guiding the liquid, and a first sealing plate and a second sealing plate for respectively sealing the first connecting tube and the second connecting tube.

[0004] However, there are still some problems with the above patent. When using the above split center pump, the lubricating oil between the bearing and the pump shaft is easy to evaporate when used for a long time or when conveying high-temperature liquid or the split center pump is used in a high-temperature environment, resulting in loss of lubrication effect between the two. The lack of lubricating oil between the pump shaft and the bearing causes dry grinding due to lack of oil, which may even lead to the defect of bearing locking in severe cases.

[0005] Therefore, how to ensure continuous lubrication between the bearing and the pump shaft, reduce dry wear, and extend the normal service life of the bearing is a problem that needs to be solved at present. Summary of the invention

[0006] The present invention provides a self-balancing single-stage double-suction split-center pump to solve the above problems existing in the prior art.

[0007] A self-balancing single-stage double-suction split case pump comprising: A split case pump and a motor, wherein the motor is connected to a pump shaft in the split case pump and is used to connect an impeller of the pump shaft, and an oil injection unit provided on the split case pump and used to inject lubricating oil into the area where the pump shaft is located; The oil injection unit comprises a locking assembly, an oil injection assembly and a fixing seat; A locking assembly connected to the oil injection assembly and used to open the oil injection assembly to allow lubricating oil to be transported from the oil injection assembly to the fixing seat; An oil injection assembly connected to the fixing seat to form an integrated structure and used to form a flow channel for lubricating oil; The fixed seat has a through hole for the flow of lubricating oil; the double suction on both sides of the impeller makes it have the characteristic of automatically balancing the axial force.

[0008] Further, the locking assembly includes a first connecting seat, a driving rod and a driven rod arranged in the first connecting seat, a transmission seat for connecting the driving rod and the driven rod, a limiting ring arranged on the driving rod, a limiting spring sleeved on the driving rod, and a first knob arranged at one end of the driving rod; The transmission seat divides the space in the first connection seat into two cavities, and the cavities are respectively connected to the air inlet nozzles; One side of the transmission seat is in contact with the limit spring; The position of the driven rod is adjusted by turning the first knob, and then the position of the driven rod is adjusted by a set air inlet nozzle, so that the lubricating oil can be injected into the preset position.

[0009] Further, the transmission seat includes a first sealing seat and a second sealing seat; The first sealing seat is sleeved on the driving rod and movably connected to the driving rod, and the limit spring is connected to the first sealing seat; The second sealing seat sleeve is arranged on the driven rod; A protrusion is provided on one side of the second sealing seat facing the first sealing seat, and a groove matching the protrusion is provided on the first sealing seat; The driven rod is provided with a slide groove, and the other end of the driving rod is located in the driven rod slide groove; By injecting air into the air inlet nozzle, the position of the transmission seat in the first connecting seat is adjusted so that the lubricating oil can be injected.

[0010] Further, the oil injection assembly includes a second connecting seat connected to the first connecting seat, an oil injection nozzle arranged on the second connecting seat, a first conical cavity and a second conical cavity opened on the second connecting seat, and a second sealing block arranged at the head position of the second conical cavity; The oil outlet of the oil injection nozzle is connected to the second tapered cavity; The free end of the driven rod is a truncated cone structure, and the driven rod sequentially passes through the first conical cavity and the second conical cavity and abuts against the second sealing block; The head of the first conical cavity is connected to the bottom of the second conical cavity.

[0011] Furthermore, the oil injection assembly includes a first sealing block sleeved on the driven rod, and a second knob abutting against the first sealing block and threadedly connected to the second connecting seat; The first sealing block extends from the bottom of the first conical cavity into the first conical cavity, and the deformation of the first sealing block is adjusted by rotating the second knob; The second connecting seat is provided with a U-shaped groove, and the second knob is located in the U-shaped groove.

[0012] Furthermore, the oil injection unit further comprises a self-locking component connected to the fixing seat, and a screw connection member connected to the self-locking component; The self-locking assembly includes a third connecting seat threadedly connected to the fixing seat, an adjusting cavity is arranged in the third connecting seat, a regulating valve core is located in the adjusting cavity, and two third sealing blocks are symmetrically arranged at both ends of the regulating valve core.

[0013] Furthermore, the regulating valve core includes an oil outlet rod, a return spring sleeved on the oil outlet rod, and a connecting plate connected to the return spring and arranged on the oil outlet rod; The adjusting cavity comprises three circular through holes with different diameters and sequentially forms a first shoulder and a second shoulder in a direction away from the fixing seat, one end of the reset spring abuts against the second shoulder, and the first shoulder is used to limit the moving distance of the connecting plate; The connecting plate is a cross-shaped structure.

[0014] Furthermore, the water inlet end of the split-center pump is also provided with a filter unit and a filter valve connected to the filter unit; The filter valve comprises a T-shaped valve seat, a first guide plate arranged at the water inlet end of the valve seat, a second guide plate located at the water outlet end of the valve seat, and a screw plug arranged at the bottom of the T-shaped valve seat and screwed to the valve seat; The first guide plate has an inclined surface on one end close to the screw plug, and the second guide plate is an arc-shaped structure.

[0015] Further, the filter unit includes a shell for connecting the valve seat and the split-center pump, a plurality of reinforcing ribs evenly arranged on the inner wall of the shell, an inner cylinder connected to the reinforcing ribs, a driving part built into the inner cylinder, a movable seat connected to the driving part, and a filter connected to the movable seat; The inner cylinder is a U-shaped structure, and its bottom is located at the water inlet end of the outer shell.

[0016] Furthermore, the driving part includes an adjusting hand wheel, an adjusting rod connected to the adjusting hand wheel, a transmission member sleeved on the adjusting rod, and a movable rod movably connected to the transmission member; One end of the movable rod is connected to the movable seat; The outer wall of the movable seat is also provided with a slide rail, and a movable groove which is slidably connected to the slide rail and is located on the inner wall of the inner cylinder; One end of the adjusting rod extends into the inner cylinder and is connected to the inner wall of the inner cylinder.

[0017] Beneficial effect: The present invention discloses a self-balancing single-stage double-suction split pump. In order to ensure continuous lubrication between the bearing and the pump shaft and reduce dry grinding, a locking assembly is provided in the device. The locking assembly in the device comprises a first connecting seat, a driving rod and a driven rod arranged in the first connecting seat, a transmission seat for connecting the driving rod and the driven rod, a limiting ring arranged on the driving rod, a limiting spring sleeved on the driving rod, and a first knob arranged at one end of the driving rod; the transmission seat divides the space in the first connecting seat into two cavities, which are respectively connected to air inlet nozzles; the locking assembly can be used as a switch of the oil injection unit to control the circulation of lubricating oil so that it can be transported to a preset position. When the locking assembly starts to work, the first knob is turned to adjust the lubrication oil. The position of the driven rod is adjusted to adjust the distance between the driven rod and the second sealing block on the second connecting seat, and then air is pumped into one of the air inlet nozzles to move the first sealing seat toward the second connecting seat, so that the driven rod abuts against the second sealing block, thereby improving the sealing performance of the driven rod and the second sealing block. When lubricating oil injection is required, air can be supplied to the other air inlet nozzle to displace the second sealing seat toward the direction of the first knob, thereby creating a gap between the driven rod and the second sealing block. The lubricating oil can then move from the second connecting seat to the fixed seat and the self-locking assembly, and flow out from the screw connection, and finally be injected into the area where the bearing and the pump shaft are located, thereby lubricating the bearing and the pump shaft, avoiding dry grinding when the pump shaft rotates, and ensuring the smooth operation of the split pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a self-balancing single-stage double-suction split-center pump of the present invention; Figure 2 It is a schematic diagram of the structure of the oil injection unit of the present invention; Figure 3 It is a schematic diagram of the locking assembly structure of the present invention; Figure 4 It is a schematic diagram of the structure of the oil injection assembly of the present invention; Figure 5 is a schematic structural diagram of a second sealing block of the present invention; Figure 6 It is a schematic diagram of the structure of the self-locking component of the present invention; Figure 7 It is a schematic diagram of the structure of the regulating valve core of the present invention; Figure 8 Schematic diagram of the filter unit structure of the present invention Fig. 9 It is a schematic diagram of the structure of the filter valve of the present invention; Fig.10It is a schematic diagram of the structure of the second guide plate of the present invention.

[0019] Figure numerals: 1, split pump; 2, oil injection unit; 21, locking assembly; 211, first connecting seat; 212, driving rod; 213, first knob; 214, limiting ring; 215, limiting spring; 216, first sealing seat; 217, second sealing seat; 218, driven rod; 219, air inlet nozzle; 22, oil injection assembly; 221, second connecting seat; 222, first sealing block; 223, second knob; 224, second sealing block; 225, first conical cavity; 226, second conical cavity; 227, injection Oil nozzle; 23, self-locking component; 231, third connecting seat; 232, third sealing block; 233, oil outlet rod; 234, return spring; 235, connecting plate; 24, screw connection; 25, fixed seat; 3, filter unit; 31, outer shell; 32, inner cylinder; 33, adjusting hand wheel; 34, adjusting rod; 35, transmission member; 36, movable rod; 37, slide rail; 38, movable seat; 39, filter screen; 4, filter valve; 41, valve seat; 42, first guide plate; 43, second guide plate; 44, screw plug; 5, motor. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0023] The present invention discloses a self-balancing single-stage double-suction split-center pump, referring to Figure 1-Figure 10 ,include: A split center pump 1 and a motor 5, wherein the motor 5 is connected to the pump shaft in the split center pump 1 and is used to connect to the impeller of the pump shaft, and an oil injection unit 2 is arranged on the split center pump 1 for injecting lubricating oil into the area where the pump shaft is located; the oil injection unit 2 includes a locking assembly 21, an oil injection assembly 22 and a fixing seat 25; the locking assembly 21 is connected to the oil injection assembly 22 and is used to open the oil injection assembly 22 so that the lubricating oil is transported from the oil injection assembly 22 to the fixing seat 25; the oil injection assembly 22 is connected to the fixing seat 25 to form an integrated structure for forming a flow channel for the lubricating oil; the fixing seat 25 is provided with a through hole for the flow of the lubricating oil; the locking assembly 21 in the oil injection unit 2 is set, and the locking assembly 21 is equivalent to the switch of the oil injection unit 2. Through the movement of the locking assembly 21, the input and output of the lubricating oil are adjusted, so that the lubricating oil can be transported to between the pump shaft and the bearing along the predetermined channel, so that the pump shaft and the bearing can be lubricated to avoid dry grinding between the pump shaft and the bearing.

[0024] The locking assembly 21 includes a first connecting seat 211, a driving rod 212 and a driven rod 218 arranged in the first connecting seat 211, a transmission seat for connecting the driving rod 212 and the driven rod 218, a limiting ring 214 arranged on the driving rod 212, a limiting spring 215 sleeved on the driving rod 212, and a first knob 213 arranged at one end of the driving rod 212; the transmission seat divides the space in the first connecting seat 211 into two cavities, and the cavities are respectively connected to air inlet nozzles 219; one side of the transmission seat abuts against the limiting spring 215; the position of the driven rod 218 is adjusted by rotating the first knob 213, and then the position of the driven rod 218 is adjusted by the provided air inlet nozzle 219, so that the lubricating oil can can be injected into a predetermined position; the transmission seat includes a first sealing seat 216 and a second sealing seat 217; the first sealing seat 216 is sleeved on the driving rod 212 and movably connected with the driving rod 212, and the limit spring 215 is connected with the first sealing seat 216; the second sealing seat 217 is sleeved on the driven rod 218; the second sealing seat 217 is provided with a protrusion on the side facing the first sealing seat 216, and the first sealing seat 216 is provided with a groove adapted to the protrusion; the driven rod 218 is provided with a slide groove, and the other end of the driving rod 212 is located in the slide groove of the driven rod 218; by injecting air into the air inlet nozzle 219, the position of the transmission seat in the first connecting seat 211 is adjusted, so that the lubricating oil can be injected; When the amount of lubricating oil injection needs to be controlled, it is divided into the following three stages: The working method of the first stage is: firstly, the first knob 213 is rotated, and then the moving first knob 213 can drive the driving rod 212 to move, and the moving driving rod 212 can change the position of the limiting ring 214, so that the limiting ring 214 pushes the transmission seat to move, and the transmission seat is adjusted to move in the first connecting seat 211, so as to adjust the position of the free end of the driven rod 218, and complete the first stage of blocking the transportation of lubricating oil; The working method of the second stage is: then, air is pumped into one of the air inlet nozzles 219, so that the first sealing seat 216 moves toward the direction of the second connecting seat 221. Since the first sealing seat 216 is slidably connected with the driving rod 212 and the driving rod 212 is located in the slide groove of the driven rod 218, when the air is inflated, the first sealing seat 216 can move on the driving rod 212, thereby pushing the second sealing seat 217 to move, and adjusting the pressure of the driven rod 218 on the second sealing block 224 to achieve secondary blocking of the lubricating oil. The working method of the third stage is as follows: when it is necessary to transport the lubricating oil, air is transported to another air inlet nozzle 219, and the stretched limit spring 215 is cooperated to make the second sealing seat 217 move toward the direction of the first knob 213, so that a gap appears between the driven rod 218 and the second sealing block 224, and then the lubricating oil can move from the second connecting seat 221 to the fixed seat 25 and the self-locking component 23, and flow out from the screw connection 24, and finally be injected into the area where the bearing and the pump shaft are located, so as to play a lubricating effect on the bearing and the pump shaft, avoid dry grinding when the pump shaft rotates, and ensure the smooth operation of the split pump 1; In the first stage, by rotating the first knob 213, not only the deformation of the second sealing block 224 can be adjusted to complete the blocking of the lubricating oil, but also the position of the limit ring 214 on the driving rod 212 can be changed during the rotation of the first knob 213, so that during the transportation of the lubricating oil, the first sealing seat 216 will abut against the limit ring 214, and then the maximum distance between the driven rod 218 and the second sealing block 224 can be controlled, so as to control the oil output and avoid excessive oil output and waste; By rotating the first knob 213, gas is injected into one of the air inlet nozzles 219, so that the pressure between the driven rod 218 and the second sealing block 224 can be adjusted in real time, thereby ensuring the smooth operation of lubricating oil transportation. Under the premise of not changing the maximum displacement of the transmission seat, the amount of gas charged is changed, and the deformation of the limit spring 215 is changed, thereby changing the pressure between the driven rod 218 and the second sealing block 224, thereby ensuring the smooth operation of lubricating oil transportation and realizing dynamic adjustment of the pressure between the driven rod 218 and the second sealing block 224. When the third stage is carried out, during the first two stages, the limit spring 215 is in a stretched state, and then when injecting air into another air inlet nozzle 219, the limit spring 215 in the stretched state cooperates with the driven rod 218 to quickly move away from the second sealing block 224, thereby increasing the injection speed of the lubricating oil.

[0025] The oil injection assembly 22 includes a second connecting seat 221 connected to the first connecting seat 211, an oil injection nozzle 227 arranged on the second connecting seat 221, a first conical cavity 225 and a second conical cavity 226 opened on the second connecting seat 221, and a second sealing block 224 arranged at the head position of the second conical cavity 226; wherein the oil outlet of the oil injection nozzle 227 is connected to the second conical cavity 226; the free end of the driven rod 218 is a truncated cone structure, and the driven rod 218 sequentially passes through the first conical cavity 225 and the second conical cavity 226 and abuts against the second sealing block 224; the head of the first conical cavity 225 is connected to the bottom of the second conical cavity 226; when a gap appears between the driven rod 218 and the second sealing block 224, the oil injection device can be used to inject oil into the first conical cavity 225 and the second conical cavity 226 through the oil injection nozzle 227, and the lubricating oil is discharged from the head of the second conical cavity 226 through the through hole on the fixed seat 25.

[0026] The oil injection assembly 22 includes a first sealing block 222 sleeved on the driven rod 218, and a second knob 223 abutting against the first sealing block 222 and threadedly connected to the second connecting seat 221; the first sealing block 222 extends from the bottom of the first conical cavity 225 into the first conical cavity 225, and the deformation of the first sealing block 222 is adjusted by rotating the second knob 223; a U-shaped groove is provided on the second connecting seat 221, and the second knob 223 is located in the U-shaped groove; by rotating the second knob 223, the extension amount of the second knob 223 into the second connecting seat 221 is adjusted, thereby changing the deformation of the first sealing block 222 and improving the sealing effect of the first sealing block 222.

[0027] The oil injection unit 2 also includes a self-locking component 23 connected to the fixed seat 25, and a screw connection 24 connected to the self-locking component 23; the self-locking component 23 includes a third connecting seat 231 screwed to the fixed seat 25, and the third connecting seat 231 is provided with an adjusting chamber, a regulating valve core located in the adjusting chamber, and two third sealing blocks 232 symmetrically arranged at both ends of the regulating valve core; the regulating valve core includes an oil outlet rod 233, a reset spring 234 sleeved on the oil outlet rod 233, and a connecting plate 235 connected to the reset spring 234 and arranged on the oil outlet rod 233; the adjusting chamber includes three circular through holes with different diameters, and a first shoulder and a second shoulder are formed in sequence in a direction away from the fixed seat 25, one end of the limit spring 215 abuts against the second shoulder, and the first shoulder is used to limit the moving distance of the connecting plate 235; the connecting plate 235 is a cross-shaped structure; When the third connecting seat 231 is connected to the fixed seat 25, the return spring 234 is in a compressed state. When the oil pressure of the lubricating oil in the oil filling assembly 22 is greater than the elastic force generated by the return spring 234, the lubricating oil can push the oil outlet rod 233 to move in the third connecting seat 231, so that it can be discharged from the outlet of the screw connector 24, so that the lubricating oil can be injected to a predetermined position. In this process, the lubricating oil can be blocked again by the set return spring 234 and the third sealing block 232. Only when the oil pressure is higher than the elastic force of the return spring 234 can the lubricating oil be transported. Since the third sealing block 232 is a conical mechanism, when the lubricating oil with a certain pressure passes through the third connecting seat 231, it will collide with the third sealing block 232 at the outlet of the third connecting seat 231, so that it forms a plurality of small oil droplets, which can then be sprayed on the pump shaft to improve the lubrication effect.

[0028] The water inlet end of the split center pump 1 is also provided with a filter unit 3, and a filter valve 4 connected to the filter unit 3; the filter valve 4 includes a T-shaped valve seat 41, a first guide plate 42 arranged at the water inlet end of the valve seat 41, a second guide plate 43 located at the water outlet end of the valve seat 41, and a screw plug 44 arranged at the bottom of the T-shaped valve seat 41 and screwed with the valve seat 41; the first guide plate 42 is provided with an inclined surface on one end close to the screw plug 44, and the second guide plate 43 is an arc-shaped structure; when the split center pump 1 is working, the water flows along the inclined surface on the first guide plate 42 and falls to the bottom of the T-shaped valve seat 41, and then as the water flow increases, the water level in the T-shaped valve seat 41 is higher than the top of the second guide plate 43, at this time, the water flow can be discharged from the water outlet end of the T-shaped valve seat 41, and the bottom of the T-shaped valve seat 41 can be used as a buffer zone, thereby buffering and precipitating impurities in the water.

[0029] The filter unit 3 includes a shell 31 for connecting the valve seat 41 and the split-center pump 1, a plurality of reinforcing ribs evenly arranged on the inner wall of the shell 31, an inner cylinder 32 connected to the reinforcing ribs, a driving part built into the inner cylinder 32, a movable seat 38 connected to the driving part, and a filter screen 39 connected to the movable seat 38; the inner cylinder 32 is a U-shaped structure, and its bottom is located at the water inlet end of the shell 31; the driving part includes an adjusting hand wheel 33, an adjusting rod 34 connected to the adjusting hand wheel 33, a transmission member 35 sleeved on the adjusting rod 34, and a movable rod 36 movably connected to the transmission member 35; one end of the movable rod 36 is connected to the movable seat 38; the outer wall of the movable seat 38 is also provided with a slide rail 37, and a filter screen 39 slidably connected to the slide rail 37 and located in the inner cylinder 3 2 movable groove on the inner wall; one end of the adjusting rod 34 extends into the inner cylinder 32 and is connected to the inner wall of the inner cylinder 32; when the split pump 1 is working, the adjusting hand wheel 33 is rotated, and the moving adjusting hand wheel 33 can drive the adjusting rod 34 to rotate, thereby driving the transmission member 35 to move, and the moving transmission member 35 can drive the movable rod 36 to move. Since one end of the movable rod 36 is movably connected with the movable seat 38, the position of the movable seat 38 can be adjusted so that it can be retracted into the inner cylinder 32, so that the filter screen 39 is directly opposite to the channel for water flow formed by the inner wall of the shell 31 and the outer wall of the inner cylinder 32, and then the impurities in the water can be filtered to prevent them from entering the split pump 1. The filter screen 39 is a cover-shaped structure. At the same time, by changing the position of the movable seat 38, the water volume can be controlled to ensure the smooth progress of the fluid transportation work.

[0030] In a further embodiment, the head of the first conical cavity 225 and the second conical cavity 226 is the end with a smaller diameter, and the other end is the bottom; the second connecting seat 221 is provided with an oil filling port, and when not in oil filling operation, the oil filling port is sealed by the second sealing block 224 and the driven rod 218; the screw connector 24 is connected to the pump housing and is used to inject lubricating oil into the pump shaft; One of the third sealing blocks 232 is used to block one end of the regulating cavity, and the other third sealing block 232 is used to block the through hole on the fixing seat 25; The gas injection nozzle is connected to a gas injection device, and the oil injection nozzle 227 is connected to an oil injection device. The gas injection device and the oil injection device are prior art.

[0031] Working principle description: When the middle pump 1 is working, the water flows along the inclined surface on the first guide plate 42 and falls to the bottom of the T-shaped valve seat 41. Then, as the water flow increases, the water surface in the T-shaped valve seat 41 is higher than the top of the second guide plate 43. At this time, the water flow can be discharged from the outlet of the T-shaped valve seat 41, and the bottom of the T-shaped valve seat 41 can be used as a buffer zone, thereby buffering and precipitating impurities in the water. When the middle pump 1 is working, the adjusting hand wheel 33 is turned, and the moving adjusting hand wheel 33 can drive the adjusting rod 34 to rotate, thereby driving the transmission member 35. Movement, the moving transmission member 35 can drive the movable rod 36 to move. Since one end of the movable rod 36 is movably connected to the movable seat 38, the position of the movable seat 38 can be adjusted so that it can be retracted into the inner cylinder 32, so that the filter screen 39 is directly opposite to the channel for water flow formed by the inner wall of the outer shell 31 and the outer wall of the inner cylinder 32, thereby filtering impurities in the water to prevent them from entering the split pump 1. The filter screen 39 is a cover-shaped structure. At the same time, by changing the position of the movable seat 38, the water volume can be controlled to ensure the smooth progress of the fluid transportation work; When the amount of lubricating oil injection needs to be controlled, it is divided into the following three stages: The working method of the first stage is: firstly, the first knob 213 is rotated, and then the moving first knob 213 can drive the driving rod 212 to move, and the moving driving rod 212 can change the position of the limiting ring 214, so that the limiting ring 214 pushes the transmission seat to move, and the transmission seat is adjusted to move in the first connecting seat 211, so as to adjust the position of the free end of the driven rod 218, and complete the first stage of blocking the transportation of lubricating oil; The working method of the second stage is: then, air is pumped into one of the air inlet nozzles 219, so that the first sealing seat 216 moves toward the direction of the second connecting seat 221. Since the first sealing seat 216 is slidably connected with the driving rod 212 and the driving rod 212 is located in the slide groove of the driven rod 218, when the air is inflated, the first sealing seat 216 can move on the driving rod 212, thereby pushing the second sealing seat 217 to move, and adjusting the pressure of the driven rod 218 on the second sealing block 224 to achieve secondary blocking of the lubricating oil. The working method of the third stage is as follows: when it is necessary to transport the lubricating oil, air is transported to another air inlet nozzle 219, and the stretched limit spring 215 is cooperated to make the second sealing seat 217 move toward the direction of the first knob 213, so that a gap appears between the driven rod 218 and the second sealing block 224, and then the lubricating oil can move from the second connecting seat 221 to the fixed seat 25 and the self-locking component 23, and flow out from the screw connection 24, and finally be injected into the area where the bearing and the pump shaft are located, so as to play a lubricating effect on the bearing and the pump shaft, avoid dry grinding when the pump shaft rotates, and ensure the smooth operation of the split pump 1; When a gap appears between the driven rod 218 and the second sealing block 224, the oil injection device can be used to inject oil into the first conical cavity 225 and the second conical cavity 226 through the oil injection nozzle 227, and the lubricating oil is discharged from the head of the second conical cavity 226 through the through hole on the fixing seat 25; When the third connecting seat 231 is connected to the fixed seat 25, the return spring 234 is in a compressed state. When the oil pressure of the lubricating oil in the oil filling assembly 22 is greater than the elastic force generated by the return spring 234, the lubricating oil can push the oil outlet rod 233 to move in the third connecting seat 231, so that it can be discharged from the outlet of the screw connector 24, so that the lubricating oil can be injected to a predetermined position.

[0032] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A self-balancing single-stage double-suction split case pump, characterized in that: include: A split-center pump (1) and a motor (5), the motor (5) being connected to a pump shaft in the split-center pump (1) and being used to connect to an impeller of the pump shaft, and an oil injection unit (2) provided on the split-center pump (1) and being used to inject lubricating oil into an area where the pump shaft is located; The oil injection unit (2) comprises a locking assembly (21), an oil injection assembly (22) and a fixing seat (25); A locking assembly (21) connected to the oil injection assembly (22) and used to open the oil injection assembly (22) so that lubricating oil can be transported from the oil injection assembly (22) to the fixing seat (25); An oil injection assembly (22) connected to the fixing seat (25) to form an integrated structure, and used to form a flow channel for lubricating oil; The fixing seat (25) is provided with a through hole for the flow of lubricating oil.

2. A self-balancing single-stage double-suction split case pump according to claim 1, characterized in that: The locking assembly (21) comprises a first connecting seat (211), a driving rod (212) and a driven rod (218) arranged in the first connecting seat (211), a transmission seat for connecting the driving rod (212) and the driven rod (218), a limiting ring (214) arranged on the driving rod (212), a limiting spring (215) sleeved on the driving rod (212), and a first knob (213) arranged at one end of the driving rod (212); The transmission seat divides the space in the first connection seat (211) into two cavities, and the cavities are respectively connected to an air inlet nozzle (219); One side of the transmission seat is in contact with a limit spring (215); The position of the driven rod (218) is adjusted by rotating the first knob (213), and then the position of the driven rod (218) is adjusted by the provided air inlet nozzle (219), so that lubricating oil can be injected into the preset position.

3. A self-balancing single-stage double-suction split case pump according to claim 2, characterized in that: The transmission seat comprises a first sealing seat (216) and a second sealing seat (217); The first sealing seat (216) is sleeved on the driving rod (212) and is movably connected to the driving rod (212), and the limit spring (215) is connected to the first sealing seat (216); The second sealing seat (217) is sleeved on the driven rod (218); A protrusion is provided on a side of the second sealing seat (217) facing the first sealing seat (216), and a groove matching the protrusion is provided on the first sealing seat (216); The driven rod (218) is provided with a slide groove, and the other end of the driving rod (212) is located in the slide groove of the driven rod (218); By injecting air into the air inlet nozzle (219), the position of the transmission seat in the first connecting seat (211) is adjusted, so that the lubricating oil can be injected.

4. A self-balancing single-stage double-suction split case pump according to claim 3, characterized in that: The oil injection assembly (22) comprises a second connecting seat (221) connected to the first connecting seat (211), an oil injection nozzle (227) arranged on the second connecting seat (221), a first tapered cavity (225) and a second tapered cavity (226) opened on the second connecting seat (221), and a second sealing block (224) arranged at the head position of the second tapered cavity (226); The oil outlet of the oil injection nozzle (227) is in communication with the second tapered cavity (226); The free end of the driven rod (218) is a truncated cone-shaped structure; the driven rod (218) sequentially passes through the first tapered cavity (225) and the second tapered cavity (226) and abuts against the second sealing block (224); The head of the first tapered cavity (225) is connected to the bottom of the second tapered cavity (226).

5. A self-balancing single-stage double-suction split case pump according to claim 4, characterized in that: The oil injection assembly (22) comprises a first sealing block (222) sleeved on the driven rod (218), and a second knob (223) abutting against the first sealing block (222) and threadedly connected to the second connecting seat (221); The first sealing block (222) extends from the bottom of the first conical cavity (225) into the first conical cavity (225), and the deformation of the first sealing block (222) is adjusted by turning the second knob (223); The second connecting seat (221) is provided with a U-shaped groove, and the second knob (223) is located in the U-shaped groove.

6. A self-balancing single-stage double-suction split case pump according to claim 1, characterized in that: The oil injection unit (2) further comprises a self-locking component (23) connected to the fixing seat (25), and a screw connection component (24) connected to the self-locking component (23); The self-locking assembly (23) comprises a third connecting seat (231) threadedly connected to the fixing seat (25), an adjusting cavity being provided in the third connecting seat (231), a regulating valve core being located in the regulating cavity, and two third sealing blocks (232) being symmetrically arranged at both ends of the regulating valve core.

7. A self-balancing single-stage double-suction split case pump according to claim 6, characterized in that: The regulating valve core comprises an oil outlet rod (233), a return spring (234) sleeved on the oil outlet rod (233), and a connecting plate (235) connected to the return spring (234) and arranged on the oil outlet rod (233); The regulating cavity comprises three circular through holes of different diameters and sequentially forms a first shoulder and a second shoulder in a direction away from the fixing seat (25); one end of the return spring (234) abuts against the second shoulder; and the first shoulder is used to limit the moving distance of the connecting plate (235); The connecting plate (235) is a cross-shaped structure.

8. A self-balancing single-stage double-suction split case pump according to claim 1, characterized in that: The water inlet end of the split-center pump (1) is also provided with a filter unit (3) and a filter valve (4) connected to the filter unit (3); The filter valve (4) comprises a T-shaped valve seat (41), a first guide plate (42) arranged at the water inlet end of the valve seat (41), a second guide plate (43) located at the water outlet end of the valve seat (41), and a screw plug (44) arranged at the bottom of the T-shaped valve seat (41) and screwed to the valve seat (41); An inclined surface is provided on one end of the first guide plate (42) close to the screw plug (44), and the second guide plate (43) is an arc-shaped structure.

9. A self-balancing single-stage double-suction split case pump according to claim 8, characterized in that: The filter unit (3) comprises a housing (31) for connecting the valve seat (41) and the split-center pump (1), a plurality of reinforcing ribs evenly arranged on the inner wall of the housing (31), an inner cylinder (32) connected to the reinforcing ribs, a driving unit built into the inner cylinder (32), a movable seat (38) connected to the driving unit, and a filter screen (39) connected to the movable seat (38); The inner cylinder (32) is a U-shaped structure, and its bottom is located at the water inlet end of the outer shell (31).

10. A self-balancing single-stage double-suction split case pump according to claim 9, characterized in that: The driving part comprises an adjusting hand wheel (33), an adjusting rod (34) connected to the adjusting hand wheel (33), a transmission member (35) sleeved on the adjusting rod (34), and a movable rod (36) movably connected to the transmission member (35); One end of the movable rod (36) is connected to the movable seat (38); The outer wall of the movable seat (38) is also provided with a slide rail (37), and a movable groove slidably connected to the slide rail (37) and located on the inner wall of the inner cylinder (32); One end of the adjusting rod (34) extends into the inner cylinder (32) and is connected to the inner wall of the inner cylinder (32).

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