A segmented blade disc pump impeller and automatic adjustment method thereof

Abstract

The present invention discloses a segmented blade disc pump impeller and an automated adjustment method thereof, which relates to the field of pump technology design, and includes: a front cover plate and a rear cover plate, wherein the opposite surfaces of the front cover plate and the rear cover plate are uniformly distributed with a plurality of blades; a notch is left in the middle of each blade. A driving member is also included; the blade includes an inner rod and an outer rod located on the same linear line, and the notch is located between the inner rod and the outer rod; the driving member is used to drive the ends of the outer rod and the inner rod located at the notch to move separately or simultaneously, and the moving direction is its own linear direction to change the position and size of the notch. With this scheme, the blades are segmented at the gas phase gathering position in the flow channel. When the notch at the segmented position sweeps over the air mass at high speed, it can effectively cut and destroy the air mass gathering and reduce the volume of the air mass, thereby solving the blockage of the flow channel by the local large volume of air mass, so that the gas-liquid two-phase medium can be more evenly transported out of the impeller.

Description

Technical Field

[0001] The invention relates to the field of pump technology design, and in particular to a segmented blade disc pump impeller and an automatic adjustment method thereof. Background Art

[0002] The disc pump is a centrifugal pump used for conveying special media. During operation, the fluid is mainly transported by the boundary layer generated by the high-speed rotation of the discs on both sides and the viscosity between the molecules inside the fluid. Figure 1 As shown in the figure, the impeller is mainly composed of a front cover plate, a rear cover plate, blades and a connecting column. The blades are installed on the cover plates on both sides, mainly used to enhance the ability of the disc pump to do work on the fluid. The connecting column structure is mainly used to connect the cover plates on both sides, which can be bolted or welded, so that the impeller becomes a whole and is connected to the motor shaft through the shaft hole, and the motor drives the impeller to rotate as a rigid body.

[0003] In traditional centrifugal pumps, the blades cut the flow channel inside the impeller into several small flow channels. Therefore, when the medium is gas-containing (gas-liquid two-phase flow) and the medium gas content reaches a critical value, bubbles will form a large volume of air mass near the inlet edge of the blade, blocking the flow channel and causing transportation failure. Compared with traditional centrifugal pumps, disc pumps have wide flow channels and are not easily blocked by air masses because the blades do not block the flow channel. The critical value of gas content that can be tolerated is much higher than that of traditional centrifugal pumps. Therefore, it is particularly suitable for conveying gas-liquid two-phase flow media and has significant advantages in application fields.

[0004] However, although the disc pump is suitable for conveying gas-liquid two-phase flow media, bubble aggregation, gas-liquid separation, and gas mass blockage will still occur at high gas content.

[0005] Therefore, how to further optimize the internal gas-liquid two-phase distribution under high gas content, make the gas-liquid mixing more uniform, and increase the maximum gas content of the gas-liquid two-phase flow that can be transported, is of great significance to further enhance the advantages of the disc pump and consolidate the application of the disc pump in the field of gas-liquid two-phase flow transportation. Summary of the invention

[0006] The present invention aims to solve the deficiencies of the prior art and to provide a segmented blade disc pump impeller and an automated adjustment method thereof. By adopting this scheme, the blades are segmented at the gas phase gathering position in the flow channel. When the gap at the segmented position sweeps over the air mass at high speed, the air mass gathering can be effectively cut and destroyed, and the volume of the air mass can be reduced, thereby solving the blockage of the flow channel by local large-volume air masses, so that the gas-liquid two-phase medium can be more evenly transported out of the impeller.

[0007] The present invention is achieved through the following technical solutions:

[0008] A segmented blade disc pump impeller, comprising:

[0009] A front cover plate and a rear cover plate, wherein a plurality of blades are evenly distributed in an annular direction on opposite surfaces of the front cover plate and the rear cover plate;

[0010] A notch is left at the middle of each blade.

[0011] Compared with the prior art, although the disc pump is suitable for conveying gas-liquid two-phase flow media, problems such as bubble aggregation, gas-liquid separation, and air mass blockage will still occur at high gas content. The present invention provides a segmented blade disc pump impeller and an automatic adjustment method thereof. By adopting this scheme, the blades are segmented at the gas phase aggregation position in the flow channel. When the gap at the segmented position sweeps over the air mass at high speed, the air mass aggregation can be effectively cut and destroyed, and the volume of the air mass can be reduced, thereby solving the blockage of the flow channel by local large-volume air masses, so that the gas-liquid two-phase medium can be more evenly conveyed out of the impeller.

[0012] The specific scheme includes conventional front and rear covers, on which a number of blades are arranged in an annular direction. According to the analysis of the fluid flow in the impeller of the disc pump, after the gas-containing fluid enters the impeller, the bubbles carried by it are subjected to the positive drag force of the fluid and the negative pressure of the pressure gradient (the positive direction is from the impeller inlet to the outlet). Under high gas content conditions, the reduction in liquid flow leads to a reduction in the drag force of the fluid. At this time, the negative pressure generated by the pressure gradient is greater than the drag force, so the bubbles are easy to gather inside the impeller to form a flow blockage. Through simulation calculations, it is found that the aggregation of bubbles in the disc pump and the formation of air mass blockage mainly occur in the middle of the suction surface of the blade. In order to improve this phenomenon, technical means need to be taken to destroy the gas phase aggregation phenomenon in this area, solve the local flow blockage caused by gas phase aggregation in this area under high gas content conditions, improve the gas-liquid two-phase flow transportation capacity of the disc pump, and strengthen its superior capabilities. Therefore, the present invention opens a notch in the middle position of the blade to form a segmented blade, so as to segment the blade at the gas phase gathering position in the flow channel. When the notch at the segmented position sweeps over the air mass at high speed, it can effectively cut and destroy the air mass gathering and reduce the volume of the air mass, thereby solving the blockage of the flow channel by local large-volume air mass, so that the gas-liquid two-phase medium can be more evenly transported out of the impeller.

[0013] In order to realize the dynamic adjustment function, a driving member is also included; the blade includes an inner rod and an outer rod located on the same linear line, and the notch is located between the inner rod and the outer rod;

[0014] The driving member is used to drive the ends of the outer rod and the inner rod located at the notch to move separately or simultaneously, and the moving direction is its own linear direction to change the position and size of the notch. In this scheme, the segmented position of the blade can be automatically adjusted by the driving member, wherein the blade is segmented, including an inner rod located at the inner position and an outer rod located at the outer position, and the gap between the inner rod and the outer rod is the notch, wherein the inner rod and the outer rod can be connected to the cover plate by sliding, so as to change the position and size of the segmented notch, or the inner rod and the outer rod can be set in the form of a telescopic rod, and the position and size of the segmented notch can be changed by changing the length of the inner rod and the outer rod; therefore, the function of the driving member can be to drive the inner rod and the outer rod to slide, or to drive the inner rod and the outer rod to telescope.

[0015] As a more optimal implementation method for changing the position and size of the segmented notch, the inner rod and the outer rod are both telescopic rods; the telescopic end of the telescopic rod faces the notch.

[0016] As a specific structure of a telescopic rod, the telescopic rod includes a fixed blade and a movable blade, wherein the fixed blade movably sleeves one end of the movable blade inside, and the movable blade can move along the length direction of the fixed blade; the driving member is arranged inside the fixed blade, and the output end of the driving member is used to drive the movable blade to move along the length direction of the fixed blade. The driving member can be implemented by telescopic drive or by rotation drive.

[0017] As a specific driving method for high-precision adjustment, the driving member includes a servo motor, a screw, a nut seat and a connecting rod. The servo motor is fixed inside the fixed blade. The output end of the servo motor is connected with a screw and is used to drive the screw to rotate. The screw is arranged along the length direction of the fixed blade; the nut seat is threadedly sleeved on the screw; the nut seat is connected to one end of the movable blade through a connecting rod;

[0018] The fixed blades and movable blades are both compatible polygons. In this solution, the telescopic drive is realized by the rotation drive of the servo motor. In the specific structure, it includes a servo motor, one end of the screw rod is connected to the output end of the servo motor through a coupling, and the other end of the screw rod is connected to a support end, the support end is fixed inside the fixed blade, and the other end of the screw rod is a smooth rod segment, and is rotatably connected to the support end, thereby improving the stability of the screw rod; a nut seat is threadedly sleeved on the screw rod, and the nut seat is connected to one end of the movable blade through a connecting rod. Since the movable blade and the fixed blade are both polygons, under the restriction of the polygon, the nut seat and the movable blade can only make linear motion during the rotation of the screw rod, thereby controlling the extension length of the movable blade, achieving the function of dynamically adjusting the telescopic amount of the movable blade, so that the segmented position of the blade is consistent with the center position of the air mass, and improving the destructive effect on the air mass.

[0019] In order to form intelligent control of dynamic adjustment, it also includes a bubble monitoring sensor and a signal receiving unit. The bubble monitoring sensor is arranged in the impeller flow channel and is used to transmit the monitoring data to the signal receiving unit. The signal receiving unit is used to control the operation of the driving member according to the monitoring data. Among them, the bubble monitoring sensor can be an optical sensor or an ultrasonic sensor, etc., and a pressure sensor can be installed to monitor the gathering position and volume change of the air mass in real time; the bubble monitoring sensor should preferably be arranged in the middle position of the suction surface of the blade, such as on the suction surface of the movable blade.

[0020] In order to improve the destructive effect on the air mass, the projections of the several blades on the front cover plate and the several blades on the rear cover plate on the opposite surfaces of the front cover plate and the rear cover plate are staggered. In this scheme, since the gas phase gathering position in the disc pump generally appears near the middle position of the blade suction surface, the blades on the front and rear cover plates of the disc pump are aligned and installed. When the impeller rotates one cycle, a group of blades on the front and rear cover plates simultaneously produce a destructive effect on the air mass. Therefore, this scheme changes the fixed connection of the front and rear cover plates of the disc pump. According to the actual situation, the front and rear cover plates of the impeller can be staggered at a certain angle to make the segmented blades on the cover plates on both sides staggered, increase the number of times the blades act on the air mass within one impeller rotation cycle, and further improve the destructive effect on the air mass; in this way, within one impeller rotation cycle, the blades on the front and rear cover plates separate to destroy the gathered air mass, and the destructive effect on the air mass is greatly increased. Of course, multiple implementation methods can also be not staggered.

[0021] In order to realize the connection between the front cover plate and the rear cover plate, a fixing column is also included, and both ends of the fixing column are detachably connected to the opposite surfaces of the front cover plate and the rear cover plate. The detachable connecting column and the front and rear cover plates can be connected by means such as but not limited to bolts.

[0022] In order to adapt to the adjustment of multiple angles between the upper and lower blades, a fixed hole is provided between adjacent blades of the front cover plate, and a plurality of movable holes are provided between adjacent blades of the rear cover plate, and the plurality of movable holes are all located in the same radial circumferential direction as the fixed hole;

[0023] One end of the fixing column is detachably connected to the fixing hole, and the other end of the fixing column is detachably connected to one of the movable holes. In this solution, by setting fixing holes between adjacent blades of the front cover plate, and setting a plurality of movable holes between adjacent blades of the rear cover plate, both ends of the fixing column are connected and installed by bolts and the fixing holes and the movable holes. In this way, when implementing the staggered function of the front and rear cover plates, it is only necessary to remove the connecting piece in the movable hole of the rear cover plate, and then rotate the front cover plate so that the fixing hole on the front cover plate is connected to different movable holes on the rear cover plate to achieve the staggered arrangement of the front and rear cover plate blades.

[0024] In a further embodiment, the present invention also provides an automatic adjustment method for a segmented blade disc pump impeller, comprising the following steps:

[0025] The bubble monitoring sensor arranged in the impeller flow channel monitors the gathering position and volume change of the air mass in the flow channel in real time, and transmits the monitoring data to the central control unit;

[0026] The central control unit analyzes the central position and volume of the air mass based on the pressure gradient change;

[0027] When the volume of the air mass exceeds a threshold value, at the position corresponding to the air mass, the driving member is controlled to separately or simultaneously drive the ends of the outer rod and the inner rod located at the notch to move, so that the notch is facing the center of the air mass, and the ends of the outer rod and the inner rod facing the notch are located between the two ends of the air mass.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0029] 1. The present invention provides a segmented blade disc pump impeller and an automated adjustment method thereof. By adopting this scheme, the original radially long straight blade is improved and designed into a segmented blade, and the blade is segmented at the gas phase gathering position in the flow channel. When the notch at the segmented position sweeps over the air mass at high speed, the air mass gathering can be effectively cut and destroyed, and the volume of the air mass can be reduced, thereby solving the blockage of the flow channel by local large-volume air masses, so that the gas-liquid two-phase medium can be more evenly transported out of the impeller.

[0030] 2. The present invention provides a segmented blade disc pump impeller and an automated adjustment method thereof. By adopting this solution, the segmented position of the blade can be adjusted by an automated adjustment structure, and pressure sensors and bubble monitoring sensors (such as optical sensors and ultrasonic sensors) are installed at key positions of the impeller flow channel (such as the middle position of the blade suction surface). The gathering position and volume changes of the air mass are monitored in real time, and the data is transmitted to the central control unit. Through the electrically controlled telescopic components, the dynamic adjustment of the blades is achieved after the motor receives the command from the central controller. In this way, the problem of the radial position of the air mass changing when the working conditions change is dealt with, so that the segmented position of the blade always remains facing the air mass, achieving the optimal air mass breaking effect.

[0031] 3. The present invention provides a segmented blade disc pump impeller and an automated adjustment method thereof. With this solution, the corresponding positions of the front and rear cover plates can be adjusted. When it is necessary to further improve the ability of the segmented blade structure to destroy air masses, the blades installed on the front and rear cover plates are changed from symmetrical installation positions to staggered arrangements, increasing the number of times the blades sweep over the air masses in one cycle, further improving the air mass destruction effect.

[0032] 4. The present invention provides a segmented blade disc pump impeller and an automated adjustment method thereof. By adopting this scheme and through the above-mentioned design, the new impeller structure has a great improvement on the gas-liquid two-phase distribution in the disc pump flow channel, which not only improves the head and efficiency of the disc pump under high gas content conditions, but also improves the conveying capacity of the high gas content gas-liquid two-phase flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0034] Figure 1 The impeller structure diagram of the disc pump in the prior art (a in the figure is a front view of a common impeller, and b is a top view of a common impeller);

[0035] Figure 2 It is a specific position diagram of the impeller gas phase in the prior art;

[0036] Figure 3 A comparison diagram of the impeller structure provided by the present invention and the blades of the prior art (a in the figure is a common impeller front cover, b is a common impeller rear cover, c is the impeller front cover of the present invention, and d is the impeller rear cover of the present invention);

[0037] Figure 4 A schematic diagram of the bubble aggregation position (a in the figure) and bubble breakage (b in the figure) provided by the present invention;

[0038] Figure 5 A schematic diagram of the structure of the telescopic rod provided by the present invention;

[0039] Figure 6 A schematic diagram of the structure of a driving member provided by the present invention;

[0040] Figure 7 This is a diagram showing the staggered adjustment effect of the cover blades provided by this invention (a in the figure is before adjustment, and b in the figure is after adjustment);

[0041] Figure 8 A schematic diagram of the connection method of the fixed column provided by this invention;

[0042] Fig. 9 A comparison diagram of the impeller gas phase aggregation provided by the present invention (a in the figure is a gas phase aggregation diagram of a common impeller, and b is a gas phase aggregation diagram of the impeller of the present invention)

[0043] Fig.10This is a comparison chart of different impeller heads and efficiency curves provided by this company.

[0044] Marks and corresponding parts names in the attached drawings:

[0045] 1-front cover, 2-rear cover, 3-blade, 4-fixed column, 5-shaft hole, 6-fixed blade, 7-movable blade, 8-bubble monitoring sensor, 9-signal receiving unit, 10-servo motor, 11-coupling, 12-screw, 13-nut seat, 14-support end, 15-connecting rod, 16-fixed hole, 17-movable hole. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0047] Embodiment 1: Embodiment 1 provides a segmented blade disc pump impeller, such as Figure 3 and Figure 4 As shown, including:

[0048] A front cover plate 1 and a rear cover plate 2, wherein a plurality of blades 3 are evenly distributed in an annular direction on opposite surfaces of the front cover plate 1 and the rear cover plate 2;

[0049] A notch is left in the middle of each blade 3 .

[0050] Compared with the prior art, although the disc pump is suitable for conveying gas-liquid two-phase flow media, problems such as bubble aggregation, gas-liquid separation, and air mass blockage will still occur at high gas content. The present invention provides a segmented blade disc pump impeller and an automatic adjustment method thereof. By adopting this scheme, the blade 3 is segmented at the gas phase aggregation position in the flow channel. When the gap at the segmented position sweeps over the air mass at high speed, the air mass aggregation can be effectively cut and destroyed, and the volume of the air mass can be reduced, thereby solving the blockage of the flow channel by local large-volume air masses, so that the gas-liquid two-phase medium can be more evenly conveyed out of the impeller.

[0051] The specific scheme includes a conventional front cover plate 1 and a rear cover plate 2, and a plurality of blades 3 are arranged circumferentially on the front cover plate 1 and the rear cover plate 2; and from the analysis of the fluid flow in the disc pump impeller, after the gas-containing fluid enters the impeller, the bubbles carried by it are subjected to the positive drag force of the fluid and the negative pressure of the pressure gradient (the positive direction is from the impeller inlet to the outlet). Under high gas content conditions, the reduction in liquid flow leads to a reduction in the drag force of the fluid. At this time, the negative pressure generated by the pressure gradient is greater than the drag force, so the bubbles are easy to gather inside the impeller, forming a flow blockage. Through simulation calculations, it is found that the aggregation of bubbles in the disc pump and the formation of air mass blockage mainly occur in the middle position of the suction surface of the blade 3, such as Figure 2As shown, Figure 2 The air.Volume Fraction in it represents the gas volume fraction. In order to improve this phenomenon, it is necessary to adopt technical means to destroy the gas phase aggregation phenomenon in this area, solve the local flow blockage caused by the gas phase aggregation in this area under the condition of high gas content, improve the gas-liquid two-phase flow conveying capacity of the disc pump, and strengthen its superior ability. Therefore, the present invention opens a notch in the middle position of the blade 3 to form a segmented blade 3, so as to segment the blade 3 at the gas phase aggregation position in the flow channel. When the notch at the segmented position sweeps over the air mass at high speed, it can effectively cut and destroy the air mass aggregation and reduce the volume of the air mass (such as Figure 4 As shown in the figure, the blockage of the flow channel by local large-volume air masses is solved, so that the gas-liquid two-phase medium can be transported out of the impeller more evenly.

[0052] Embodiment 2: This embodiment 2 is further optimized on the basis of embodiment 1, such as Figure 5 and Figure 6 As shown, an intelligent control system is provided with monitoring, analysis, signal processing and execution control functions for realizing dynamic adjustment.

[0053] In order to realize the dynamic adjustment function, a driving member is also included; the blade 3 includes an inner rod and an outer rod located on the same linear line, and the notch is located between the inner rod and the outer rod;

[0054] The driving member is used to drive the ends of the outer rod and the inner rod located at the notch to move separately or simultaneously, and the moving direction is its own linear direction to change the position and size of the notch. In this scheme, the segmented position of the blade 3 can be automatically adjusted by the driving member, wherein the blade 3 is segmented, including an inner rod located at the inner position and an outer rod located at the outer position, and the gap between the inner rod and the outer rod is the notch, wherein the inner rod and the outer rod can be connected to the cover plate by sliding, so as to change the position and size of the segmented notch, or the inner rod and the outer rod can be set in the form of a telescopic rod, and the position and size of the segmented notch can be changed by changing the telescopic length of the inner rod; therefore, the function of the driving member can be to drive the inner rod and the outer rod to slide, or to drive the inner rod and the outer rod to telescope.

[0055] As a more optimal implementation method for changing the position and size of the segmented notch, the inner rod and the outer rod are both telescopic rods; the telescopic end of the telescopic rod faces the notch.

[0056] As a specific structure of a telescopic rod, the telescopic rod includes a fixed blade 6 and a movable blade 7, wherein the fixed blade 6 movably sleeves one end of the movable blade 7 therein, and the movable blade 7 can move along the length direction of the fixed blade 6; the driving member is arranged inside the fixed blade 6, and the output end of the driving member is used to drive the movable blade 7 to move along the length direction of the fixed blade 6. The driving member can be implemented by telescopic drive or by rotation drive.

[0057] As a specific driving mode of high-precision adjustment, the driving member includes a servo motor 10, a screw rod 12, a nut seat 13 and a connecting rod 15. The servo motor 10 is fixed inside the fixed blade 6. The output end of the servo motor 10 is connected with a screw rod 12, and is used to drive the screw rod 12 to rotate. The screw rod 12 is arranged along the length direction of the fixed blade 6; the nut seat 13 is threadedly sleeved on the screw rod 12; the nut seat 13 is connected to one end of the movable blade 7 through the connecting rod 15;

[0058] The fixed blade 6 and the movable blade 7 are both compatible polygons. In this solution, the telescopic drive is realized by the rotation drive of the servo motor. In the specific structure, it includes a servo motor 10, one end of the screw rod 12 is connected to the output end of the servo motor 10 through a coupling 11, and the other end of the screw rod 12 is connected to a support end 14, the support end 14 is fixed inside the fixed blade 6, and the other end of the screw rod 12 is a smooth rod segment, and is rotatably connected to the support end 14, thereby improving the stability of the screw rod 12; a nut seat 13 is threadedly sleeved on the screw rod 12, and the nut seat 13 is connected to one end of the movable blade 7 through a connecting rod 15. Since the movable blade 7 and the fixed blade 6 are both polygons, under the restriction of the polygon, the nut seat 13 and the movable blade 7 can only do linear motion during the rotation of the screw rod 12, thereby controlling the extension length of the movable blade 7, achieving the function of dynamically adjusting the telescopic amount of the movable blade 7, so that the segmented position of the blade 3 is consistent with the center position of the air mass, and improving the destructive effect on the air mass.

[0059] In order to form intelligent control of dynamic regulation, it also includes a bubble monitoring sensor 8 and a signal receiving unit 9. The bubble monitoring sensor 8 is arranged in the impeller flow channel and is used to transmit the monitoring data to the signal receiving unit 9. The signal receiving unit 9 is used to control the operation of the driving member according to the monitoring data. Among them, the bubble monitoring sensor 8 can adopt an optical sensor or an ultrasonic sensor, etc., and a pressure sensor can be installed to monitor the gathering position and volume change of the air mass in real time; the bubble monitoring sensor 8 should preferably be arranged in the middle position of the suction surface of the blade 3, such as being arranged on the suction surface of the movable blade 7.

[0060] Embodiment 3: This embodiment 3 is further optimized on the basis of embodiment 1 or 2, such as Figure 7and Figure 8 shown.

[0061] In order to improve the destructive effect on the air mass, the projections of the several blades 3 on the front cover plate 1 and the several blades 3 on the rear cover plate 2 on the opposite surfaces of the front cover plate 1 and the rear cover plate 2 are staggered. In this scheme, since the gas phase gathering position in the disc pump generally appears near the middle position of the suction surface of the blade 3, the blades 3 on the front and rear cover plates 2 of the disc pump are aligned and installed. When the impeller rotates for one cycle, a group of blades 3 on the front cover plate 1 and the rear cover plate 2 simultaneously produce a destructive effect on the air mass. Therefore, this scheme changes the fixed connection of the front cover plate 1 and the rear cover plate 2 of the disc pump. According to the actual situation, the front and rear cover plates 2 of the impeller can be staggered at a certain angle, so that the segmented blades 3 on the cover plates on both sides are staggered, increasing the number of times the blades 3 act on the air mass within one impeller rotation cycle, and further improving the destructive effect on the air mass; in this way, within one impeller rotation cycle, the blades 3 on the front and rear cover plates 2 separate to destroy the gathered air mass, and the destructive effect on the air mass is greatly increased. Of course, multiple implementation methods can also be not staggered.

[0062] In order to realize the connection between the front cover plate 1 and the rear cover plate 2, a fixing column 4 is also included, and both ends of the fixing column 4 are detachably connected to the opposite surfaces of the front cover plate 1 and the rear cover plate 2, and both ends of the fixing column 4 are staggered from the blades 3 on the front cover plate 1 and the rear cover plate 2. The detachable connecting column and the front and rear cover plates 2 can be connected by, but not limited to, bolts and the like.

[0063] In order to adapt to the adjustment of multiple angles between the upper and lower blades 3, a fixed hole 16 is provided between adjacent blades 3 on the front cover plate 1, and a plurality of movable holes 17 are provided between adjacent blades 3 on the rear cover plate 2. The plurality of movable holes 17 are located in the same radial circumferential direction as the fixed hole 16.

[0064] One end of the fixing column 4 is detachably connected to the fixing hole 16, and the other end of the fixing column 4 is detachably connected to one of the movable holes 17. In this solution, by setting fixing holes 16 between adjacent blades 3 of the front cover plate 1, and setting a plurality of movable holes 17 between adjacent blades 3 of the rear cover plate 2, both ends of the fixing column 4 are connected to the fixing holes 16 and the movable holes 17 by bolts for installation. In this way, when implementing the staggered function of the front and rear cover plates 2, it is only necessary to remove the connecting piece in the movable hole 17 on the rear cover plate 2, and then rotate the front cover plate 1 so that the fixing hole 16 on the front cover plate 1 is connected to different movable holes 17 on the rear cover plate 2 to achieve the staggered arrangement of the blades 3 of the front and rear cover plates 2.

[0065] Embodiment 4: This embodiment 4 is further optimized on the basis of embodiment 1-3, such as Figure 3-Figure 10As shown, an automatic adjustment method for the impeller of a segmented blade 3 disc pump is provided. Although the traditional disc pump can transport gas-liquid two-phase flow with a certain gas content, there are still phenomena such as gas phase aggregation, gas-liquid separation and flow blockage inside at high gas content. The main reason is that while the blade 3 does work on the fluid transportation, the low-pressure area on the suction surface of the blade 3 will cause the gas phase to be retained and aggregated to form an air mass. This gas phase aggregation will affect the flow characteristics in the pump, and as the gas content continues to increase, this aggregation phenomenon will become more serious, forming a larger air mass to block the flow channel, resulting in increased instability of the flow in the pump, seriously affecting the transportation and work-performing capacity of the fluid, and significantly reducing the performance of the disc pump.

[0066] Therefore, the present invention divides the original radial straight blades 3 into segments, so that the segmented blades 3 have a cutting and damaging effect on the air mass when sweeping over the air mass, greatly reducing the volume of the air mass, reducing the gas-liquid separation phenomenon, and making the gas-liquid two-phase mixing more uniform, which is convenient for transportation. At the same time, the automatic adjustment function of the segmented position of the blade 3 is provided to cope with the change of the position of the air mass under different working conditions, so that the segmented position is always facing the air mass, maintaining the optimal destructive effect on the air mass. Finally, the function of staggered arrangement of the impeller blades 3 is provided to increase the number of times the blades 3 act on the air mass within one impeller rotation cycle, further improving the destructive effect on the air mass.

[0067] The up-regulation function includes the following specific steps:

[0068] Install a pressure sensor and a bubble monitoring sensor 8 (such as an optical sensor or an ultrasonic sensor) at a key position of the impeller flow channel (such as the middle position of the suction surface of the blade 3); monitor the gathering position and volume change of the air mass in real time, and transmit the data to the central control unit;

[0069] The central control unit analyzes the central position and volume of the air mass based on the pressure gradient change; it can be monitored by the pressure monitoring sensor and the bubble monitoring sensor 8;

[0070] When the volume of the air mass exceeds the threshold value, at the position corresponding to the air mass, a signal is transmitted to the signal receiving unit 9 of the servo motor 10 in the blade 3 at that location, thereby controlling the rotation direction and speed of the screw rod 12 through the servo motor 10, and at the same time controlling the movement of the two relative movable blades 7, so that the notch is facing the center of the air mass, and the ends of the two relative movable blades 7 are both located between the two ends of the air mass.

[0071] The above scheme proposes a segmented blade 3-disc pump impeller and an automated adjustment method thereof. The disc pump often faces variable operating conditions during operation. Under variable operating conditions, the internal flow conditions change accordingly, and the location where gas accumulation and blockage occur also changes. In this case, the automatic monitoring and adjustment function of the segmented position of the segmented disc pump impeller is designed to ensure that the segmented position of blade 3 during operation keeps consistent with the position of air mass blockage in the impeller under different operating conditions, thereby maintaining the optimal improvement effect on air mass blockage; and the blade 3 can also be staggered to achieve the optimal improvement effect on gas phase aggregation and gas-liquid two-phase flow. The internal flow field and performance of the segmented adjustable impeller structure can be calculated by computational fluid dynamics simulation software. The comparison results with the gas phase aggregation in the ordinary disc pump impeller are shown as follows. Fig. 9 As shown, Fig. 9 The air.Volume Fraction in it represents the gas volume fraction. It can be seen that the segmented adjustable impeller has a significant improvement effect on the gas aggregation at the suction surface of blade 3 compared with the original impeller. The segmented design of blade 3 can destroy the aggregation of the gas phase, effectively prevent the formation of air masses and flow blockage at the suction surface of blade 3, make the overall distribution of the gas phase in the impeller relatively uniform, and improve the gas-liquid two-phase flow conveying capacity of the disc pump. The performance of the disc pump of the segmented adjustable impeller and the original impeller was further calculated under different inlet gas content conditions, and the performance curve was drawn as shown in the figure. Fig.10 As shown, Fig.10 In H Indicates lift, IGVF represents the inlet gas volume fraction, η represents efficiency It can be seen that the disc pump head and efficiency of the segmented adjustable impeller are better than those of the disc pump with the original impeller at a large gas content. This impeller structure significantly improves the phenomenon of air mass blockage in the flow channel. The disc pump head is increased by 1.3% at most, and the efficiency is increased by 2.5% at most.

[0072] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A segmented blade disc pump impeller, characterized in that: include: A front cover plate (1) and a rear cover plate (2), wherein a plurality of blades (3) are evenly distributed in an annular direction on opposite surfaces of the front cover plate (1) and the rear cover plate (2); A notch is left in the middle of each blade (3); Also includes a driving member; the blade (3) includes an inner rod and an outer rod located on the same linear line, and the notch is located between the inner rod and the outer rod; The driving member is used to drive the ends of the outer rod and the inner rod located at the notch to move separately or simultaneously, and the moving direction is its own linear direction, so as to change the position and size of the notch; The inner rod and the outer rod are both telescopic rods; the telescopic end of the telescopic rod faces the notch.

2. A segmented blade disc pump impeller according to claim 1, characterized in that: The telescopic rod comprises a fixed blade (6) and a movable blade (7); the fixed blade (6) movably sleeves one end of the movable blade (7) therein, and the movable blade (7) is movable along the length direction of the fixed blade (6); the driving member is arranged inside the fixed blade (6), and the output end of the driving member is used to drive the movable blade (7) to move along the length direction of the fixed blade (6).

3. A segmented blade disc pump impeller according to claim 2, characterized in that: The driving member comprises a servo motor (10), a screw rod (12), a nut seat (13) and a connecting rod (15); the servo motor (10) is fixed inside the fixed blade (6); the output end of the servo motor (10) is connected to a screw rod (12) and is used to drive the screw rod (12) to rotate; the screw rod (12) is arranged along the length direction of the fixed blade (6); the nut seat (13) is threadedly sleeved on the screw rod (12); the nut seat (13) is connected to one end of the movable blade (7) via the connecting rod (15); The fixed blades (6) and the movable blades (7) are both matching polygons.

4. A segmented blade disc pump impeller according to claim 1, characterized in that: It also comprises a bubble monitoring sensor (8) and a signal receiving unit (9), wherein the bubble monitoring sensor (8) is arranged in the impeller flow channel and is used to transmit monitoring data to the signal receiving unit (9), and the signal receiving unit (9) is used to control the operation of the driving member according to the monitoring data.

5. A segmented blade disc pump impeller according to claim 1, characterized in that: The projections of the plurality of blades (3) on the front cover plate (1) and the plurality of blades (3) on the rear cover plate (2) on the opposite surfaces of the front cover plate (1) and the rear cover plate (2) are staggered with each other.

6. A segmented blade disc pump impeller according to claim 5, characterized in that: It also comprises a fixing column (4), both ends of which are detachably connected to the opposite surfaces of the front cover plate (1) and the rear cover plate (2).

7. A segmented blade disc pump impeller according to claim 6, characterized in that: A fixing hole (16) is provided between adjacent blades of the front cover plate (1), and a plurality of movable holes (17) are provided between adjacent blades of the rear cover plate (2), wherein the plurality of movable holes (17) are all located in the same radial circumferential direction as the fixing hole (16); One end of the fixing column (4) is detachably connected to the fixing hole (16), and the other end of the fixing column (4) is detachably connected to one of the movable holes (17).

8. The automatic adjustment method of a segmented blade disc pump impeller according to any one of claims 1 to 7, characterized in that: The following steps are involved: The bubble monitoring sensor (8) arranged in the impeller flow channel monitors the gathering position and volume change of the air mass in the flow channel in real time, and transmits the monitoring data to the central control unit; The central control unit analyzes the central position and volume of the air mass based on the pressure gradient change; When the volume of the air mass exceeds a threshold value, at the position corresponding to the air mass, the driving member is controlled to separately or simultaneously drive the ends of the outer rod and the inner rod located at the notch to move, so that the notch is facing the center of the air mass, and the ends of the outer rod and the inner rod facing the notch are located between the two ends of the air mass.

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