Circulating water pump guide and circulating water pump adapted to a moving blade

Abstract

The application discloses a circulating water pump guide vane and a circulating water pump with adaptive blades, and relates to the field of ship machinery. The application is aimed at solving the problem that the existing guide vanes cannot match the flow use demand of the newly-developed mixed-flow pump impeller. The circulating water pump guide vane with adaptive blades comprises a guide vane main body and a plurality of profiled stationary blades, and the plurality of profiled stationary blades are uniformly arranged along the circumference of the guide vane main body and fixed on the outer circumferential surface of the guide vane main body. The circulating water pump with adaptive blades comprises the circulating water pump guide vane with adaptive blades.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of marine machinery, and particularly relates to a circulating water pump guide vane and a circulating water pump. BACKGROUND

[0002] With the increase of the power of the circulating water pump power system of a ship, the required cooling seawater flow increases, and the lift increases. Therefore, a marine mixed flow circulating water pump needs to be designed in the existing space to improve the hydraulic performance. The core of the performance of the mixed flow pump lies in the efficient matching of the impeller moving blade and the guide vane static blade. The guide vane static blade plays a key role in converting the high-speed rotating fluid out of the impeller into axial flow and rectifying. The existing guide vane needs to solve the problems of matching of the dynamic and static lines, setting of the guide vane gap, and collaborative design with the moving blade. The design cannot match the flow usage demand of the new mixed flow pump impeller. SUMMARY

[0003] The present application is to solve the problem that the existing guide vane cannot match the flow usage demand of the new mixed flow pump impeller. The present application provides a circulating water pump guide vane and a circulating water pump that adapt to the moving blade.

[0004] The first aspect of the present application provides a circulating water pump guide vane that adapts to the moving blade, comprising: a guide vane main body and a plurality of static blades, the plurality of static blades are uniformly arranged along the circumference of the guide vane main body and fixed on the outer circumferential surface of the guide vane main body.

[0005] A space rectangular coordinate system is constructed with the center of the bottom of the guide vane as the origin, the main shaft of the guide vane as the Z axis, and the bottom plane of the guide vane as the XY plane. In the Y axis direction, the distance of 220±10mm from the Z axis is taken as the reference distance L1.

[0006] At a plurality of different radial positions in the X axis direction and parallel to the YZ plane, the cross sections of the static blades are respectively taken. The X axis coordinate values of the cross sections are respectively 290±10mm, 315±10mm, 345±10mm, 375±10mm, 405±10mm, 435±10mm and 465±10mm. In each cross section, the static blade has a value with L1 as the coefficient at a plurality of set heights in the range of 60±10mm to 300±10mm in the Z axis direction, and the blade profile presents a continuously changing geometric shape in the height direction, so that the static blade as a whole constitutes a spatial curved surface structure that adapts to the flow passage of the moving blade.

[0007] In a possible design, the multiple set heights in the range of 60±10mm to 300±10mm along the Z-axis direction are respectively 60±10mm, 100±10mm, 140±10mm, 180±10mm, 220±10mm, 260±10mm and 300±10mm, and are respectively denoted as Z60 height, Z100 height, Z140 height, Z180 height, Z220 height, Z260 height and Z300 height.

[0008] In a possible design, in the profile with the X-axis coordinate value of 290±10mm:

[0009] At the Z300 height, the stator blade Y-axis width is 0.7L1, and the stator blade is away from the Z-axis by 16.5L1;

[0010] At the Z260 height, the stator blade Y-axis width is 0.8L1, and the stator blade is away from the Z-axis by 12.8L1;

[0011] At the Z220 height, the stator blade Y-axis width is L1, and the stator blade is away from the Z-axis by 8.4L1;

[0012] At the Z180 height, the stator blade inner side edge is away from the Z-axis by 7.4L1, the stator blade inner side edge along the Z-axis height is 0.9L1, and the distance between the upper end of the stator blade inner side edge and the Z220 height is 0.85L1;

[0013] In the profile with the X-axis coordinate value of 315±10mm:

[0014] At the Z300 height, the stator blade Y-axis width is 0.7L1, and the stator blade is away from the Z-axis by 13.2L1;

[0015] At the Z260 height, the stator blade Y-axis width is 0.76L1, and the stator blade is away from the Z-axis by 12.2L1;

[0016] At the Z220 height, the stator blade Y-axis width is 0.9L1, and the stator blade is away from the Z-axis by 10.5L1;

[0017] At the Z180 height, the stator blade Y-axis width is 1.2L1, and the stator blade is away from the Z-axis by 7.9L1;

[0018] At the Z140 height, the stator blade Y-axis width is 1.26L1, and the stator blade is away from the Z-axis by 4.28L1;

[0019] At the Z100 height, the stator blade Y-axis width is 1.26L1, and the stator blade is away from the Z-axis by 0.65L1;

[0020] The distance between the lower end outer edge inflection point of the stator blade and the Y-axis is 0.62L1, and the distance between the lower end outer edge inflection point of the stator blade and the Z100 height is 0.9L1;

[0021] In the section with an X-axis coordinate of 345±10mm:

[0022] At a height of Z300, the Y-axis width of the stationary blade is 0.65L1, and the distance between the stationary blade and the Z-axis is 14.84L1;

[0023] At a height of Z260, the Y-axis width of the stationary blade is 0.7L1, and the distance between the stationary blade and the Z-axis is 14.1L1.

[0024] At height Z220, the Y-axis width of the stationary blade is 0.8L1, and the distance between the stationary blade and the Z-axis is 12.84L1;

[0025] At a height of Z180, the width of the stationary blade along the Y-axis is 0.98L1, and the distance between the stationary blade and the Z-axis is 10.88L1.

[0026] At a height of Z140, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 7.65L1.

[0027] At height Z100, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 4.1L1.

[0028] The Y-axis distance between the inflection point of the inner edge and the inflection point of the outer edge at the lower end of the stationary blade is 0.61L1, and the Z-axis distance is 0.44L1.

[0029] The distance between the inflection point of the lower inner edge of the stationary blade and the Z-axis is 2.2L1, and the distance between the inflection point and the height of Z100 is 1.24L1;

[0030] In the section with an X-axis coordinate of 375±10mm:

[0031] At a height of Z300, the Y-axis width of the stationary blade is 0.63L1, and the distance between the stationary blade and the Z-axis is 16.34L1.

[0032] At a height of Z260, the Y-axis width of the stationary blade is 0.68L1, and the distance between the stationary blade and the Z-axis is 15.8L1.

[0033] At height Z220, the Y-axis width of the stationary blade is 0.75L1, and the distance between the stationary blade and the Z-axis is 14.87L1.

[0034] At a height of Z180, the Y-axis width of the stationary blade is 0.86L1, and the distance between the stationary blade and the Z-axis is 13.38L1.

[0035] At a height of Z140, the Y-axis width of the stationary blade is 1.1L1, and the distance between the stationary blade and the Z-axis is 10.97L1.

[0036] At height Z100, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 7.4L1.

[0037] At Z60 height, the stator blade Y-axis width is 0.56L1, and the stator blade is 4.5L1 away from the Z-axis;

[0038] In the profile with X-axis coordinate value of 405±10mm:

[0039] At Z300 height, the stator blade Y-axis width is 0.58L1, and the stator blade is 17.7L1 away from the Z-axis;

[0040] At Z260 height, the stator blade Y-axis width is 0.65L1, and the stator blade is 17.4L1 away from the Z-axis;

[0041] At Z220 height, the stator blade Y-axis width is 0.7L1, and the stator blade is 16.7L1 away from the Z-axis;

[0042] At Z180 height, the stator blade Y-axis width is 0.79L1, and the stator blade is 15.6L1 away from the Z-axis;

[0043] At Z140 height, the stator blade Y-axis width is 0.93L1, and the stator blade is 13.76L1 away from the Z-axis;

[0044] At Z100 height, the stator blade Y-axis width is 1.26L1, and the stator blade is 10.78L1 away from the Z-axis;

[0045] At Z60 height, the stator blade Y-axis width is 1.26L1, and the stator blade is 7.15L1 away from the Z-axis;

[0046] The Y-axis distance between the lower end inner edge inflection point of the stator blade and the outer edge inflection point is 0.59L1, and the Z-axis distance is 0.46L1;

[0047] The distance between the lower end inner edge inflection point of the stator blade and Z60 height is 0.49L1, and the distance from the Z-axis is 6.44L1;

[0048] In the profile with X-axis coordinate value of 435±10mm:

[0049] At Z100 height, the stator blade Y-axis width is 1.04L1, and the stator blade is 13.97L1 away from the Z-axis;

[0050] At Z60 height, the stator blade Y-axis width is 1.26L1, and the stator blade is 10.5L1 away from the Z-axis;

[0051] The distance between the upper end outer edge of the stator blade and the Z-axis is 15.4L1;

[0052] The distance between the lower end inner edge inflection point of the stator blade and the Z-axis is 8.48L1, and the distance from Z60 height is 1.41L1;

[0053] The Y-axis distance between the lower end inner edge inflection point and the outer edge inflection point of the vane is 0.58L1, and the Z-axis distance is 0.47L1;

[0054] In the profile with the X-axis coordinate value of 465±10mm:

[0055] The outer edge distance of the vane from the Z-axis is 11.46L1;

[0056] The Y-axis distance between the lower end outer edge inflection point and the inner edge inflection point of the vane is 0.57L1, and the Z-axis distance is 0.47L1;

[0057] The distance from the Z-axis of the lower end inner edge inflection point of the vane is 10.48L1;

[0058] The distance from the Z60 height of the lower end outer edge inflection point of the vane is 2.83L1.

[0059] In one possible design, the Z60 height, the Z100 height, the Z140 height, the Z180 height, the Z220 height, the Z260 height and the Z300 height have coordinates of 60mm, 100mm, 140mm, 180mm, 220mm, 260mm and 300mm on the Z-axis respectively.

[0060] In one possible design, the X-axis coordinate values of the profiles are 290mm, 315mm, 345mm, 375mm, 405mm, 435mm and 465mm respectively.

[0061] In one possible design, the reference distance L1 is 220mm from the Z-axis.

[0062] In one possible design, the number of vanes is 5.

[0063] In one possible design, the guider body is manufactured by combining a first half guider and a second half guider.

[0064] In one possible design, the first half guider and the second half guider are installed through the lower rubber bushing and fastened by bolts.

[0065] The second aspect of the present application provides a circulating water pump with adaptive vanes, which comprises the above-mentioned circulating water pump guider with adaptive vanes.

[0066] The beneficial effects of the present application are:

[0067] The vane profile of the present application can be adapted to the moving vanes, improve the flow characteristics in the pump, reduce the hydraulic loss, and improve the stability and efficiency of the pump. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 is a cross-sectional view of the mixed flow circulating pump;

[0069] Figure 2 is an elevational view of the guide;

[0070] Figure 3 is a plan view of the guide;

[0071] Figure 4 is a profile view on the X290 section;

[0072] Figure 5 is a profile view on the X315 section;

[0073] Figure 6 is a profile view on the X345 section;

[0074] Figure 7 is a profile view on the X375 section;

[0075] Figure 8 is a profile view on the X405 section;

[0076] Figure 9 is a profile view on the X435 section;

[0077] Figure 10 is a profile view on the X465 section;

[0078] Figure 11 is a 25% height pressure cloud plot, where (a) indicates the axial flow pump and (b) indicates the mixed flow pump;

[0079] Figure 12 is a 50% height pressure cloud plot, where (a) indicates the axial flow pump and (b) indicates the mixed flow pump;

[0080] Figure 13 is a 75% height pressure cloud plot, where (a) indicates the axial flow pump and (b) indicates the mixed flow pump;

[0081] Figure 14 is a 25% height turbulent kinetic energy cloud plot, where (a) indicates the axial flow pump and (b) indicates the mixed flow pump;

[0082] Figure 15 is a 50% height turbulent kinetic energy cloud plot, where (a) indicates the axial flow pump and (b) indicates the mixed flow pump;

[0083] Figure 16 is a 75% height turbulent kinetic energy cloud plot, where (a) indicates the axial flow pump and (b) indicates the mixed flow pump;

[0084] In the diagram, 1-pump shaft; 2-screw; 3-upper shaft sleeve; 4-upper rubber bearing; 5-upper pump cover; 6-first half guide; 7-corrosion-resistant protective plate; 8-corrosion-resistant protective plate bolt; 9-lower rubber bearing; 10-bearing cover; 11-lower pump cover; 12-washer; 13-inlet bellows; 14-impeller chamber; 15-outlet bellows; 16-upper pump body; 17-second half guide; 18-lower shaft sleeve; 19-lower pump body; 20-pump body fastening bolt; 21-impeller; 22-impeller nut. Detailed Implementation

[0085] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0086] A novel design for the guide vane, matching the impeller profile of the core working component of the circulating water pump, can improve the flow characteristics within the pump, reduce dynamic and static interference excitation, meet various flow rate and head operating conditions, and improve efficiency while comprehensively optimizing performance. The following specific implementation methods are provided for this purpose.

[0087] Specific Implementation Method 1: The circulating water pump guide vane adapted to the moving blades described in this embodiment is composed of two halves, a first half guide vane 6 and a second half guide vane 17, which are fixed together by bolts on the split surface. After the first half guide vane 6 and the second half guide vane 17 are installed through the stop of the lower rubber bearing 9, they are fastened together with bolts to form a whole. Five profiled stationary blades are evenly arranged along the outer circumference of the guide vane body.

[0088] Construct a spatial rectangular coordinate system with the bottom center of the guide as the origin, such as Figure 2 As shown, the main axis of the guide is the Z-axis; Figure 3 As shown, the bottom plane of the guide is the XY plane. Seven profiled stationary blade sections parallel to the YZ plane are taken along the X-axis, as shown... Figures 4 to 10The 7 profile lines of the static blade are respectively denoted as X290 cross section, X315 cross section, X345 cross section, X375 cross section, X405 cross section, X435 cross section and X465 cross section, and the distances from the YZ plane are respectively 290 mm, 315 mm, 345 mm, 375 mm, 405 mm, 435 mm and 465 mm. Along the Y axis direction, the distance from the Z axis 220 mm is taken as the reference distance L1. In the Z axis direction, 7 heights are taken respectively, which are respectively denoted as Z60 height, Z100 height, Z140 height, Z180 height, Z220 height, Z260 height and Z300 height, and the distances from the XY plane are respectively 60 mm, 100 mm, 140 mm, 180 mm, 220 mm, 260 mm and 300 mm.

[0089] As shown in FIG. 4, in the X290 cross section, the Y axis width of the blade at the Z300 height is 0.7L1, and the distance of the blade from the Z axis is 16.5L1; the Y axis width of the blade at the Z260 height is 0.8L1, and the distance of the blade from the Z axis is 12.8L1; the Y axis width of the blade at the Z220 height is L1, and the distance of the blade from the Z axis is 8.4L1; the inner side edge of the blade at the Z180 height is 7.4L1 from the Z axis, the Z axis thickness of the inner side edge of the blade is 0.9L1, and the distance from the upper end of the inner side edge of the blade to the Z220 height is 0.85L1. Figure 4 As shown in FIG. 5, in the X315 cross section, the Y axis width of the blade at the Z300 height is 0.7L1, and the distance of the blade from the Z axis is 13.2L1; the Y axis width of the blade at the Z260 height is 0.76L1, and the distance of the blade from the Z axis is 12.2L1; the Y axis width of the blade at the Z220 height is 0.9L1, and the distance of the blade from the Z axis is 10.5L1; the Y axis width of the blade at the Z180 height is 1.2L1, and the distance of the blade from the Z axis is 7.9L1; the Y axis width of the blade at the Z140 height is 1.26L1, and the distance of the blade from the Z axis is 4.28L1; the Y axis width of the blade at the Z100 height is 1.26L1, and the distance of the blade from the Z axis is 0.65L1; the distance from the Y axis to the inflection point of the outer edge of the lower end of the blade is 0.62L1, and the distance from the Z100 height to the inflection point of the outer edge of the lower end of the blade is 0.9L1.

[0090] Figure 5 As shown in FIG. 6, in the X345 cross section, the Y axis width of the blade at the Z300 height is 0.7L1, and the distance of the blade from the Z axis is 11.5L1; the Y axis width of the blade at the Z260 height is 0.76L1, and the distance of the blade from the Z axis is 10.5L1; the Y axis width of the blade at the Z220 height is 0.9L1, and the distance of the blade from the Z axis is 8.5L1; the Y axis width of the blade at the Z180 height is 1.2L1, and the distance of the blade from the Z axis is 6.5L1; the Y axis width of the blade at the Z140 height is 1.26L1, and the distance of the blade from the Z axis is 3.5L1; the Y axis width of the blade at the Z100 height is 1.26L1, and the distance of the blade from the Z axis is 0.65L1; the distance from the Y axis to the inflection point of the outer edge of the lower end of the blade is 0.62L1, and the distance from the Z100 height to the inflection point of the outer edge of the lower end of the blade is 0.9L1.

[0091] As shown in FIG. 7, in the X375 cross section, the Y axis width of the blade at the Z300 height is 0.7L1, and the distance of the blade from the Z axis is 10.5L1; the Y axis width of the blade at the Z260 height is 0.76L1, and the distance of the blade from the Z axis is 9.5L1; the Y axis width of the blade at the Z220 height is 0.9L1, and the distance of the blade from the Z axis is 8.5L1; the Y axis width of the blade at the Z180 height is 1.2L1, and the distance of the blade from the Z axis is 6.5L1; the Y axis width of the blade at the Z140 height is 1.26L1, and the distance of the blade from the Z axis is 3.5L1; the Y axis width of the blade at the Z100 height is 1.26L1, and the distance of the blade from the Z axis is 0.65L1; the distance from the Y axis to the inflection point of the outer edge of the lower end of the blade is 0.62L1, and the distance from the Z100 height to the inflection point of the outer edge of the lower end of the blade is 0.9L1. Figure 6 ​As shown, at section X345, the blade's Y-axis width is 0.65L1 at height Z300, and the blade's distance from the Z-axis is 14.84L1; at height Z260, the blade's Y-axis width is 0.7L1, and the blade's distance from the Z-axis is 14.1L1; at height Z220, the blade's Y-axis width is 0.8L1, and the blade's distance from the Z-axis is 12.84L1; at height Z180, the blade's Y-axis width is 0.98L1, and the blade's distance from the Z-axis is 10.88L1. 1; At height Z140, the blade's Y-axis width is 1.26L1, and the blade's distance from the Z-axis is 7.65L1; At height Z100, the blade's Y-axis width is 1.26L1, and the blade's distance from the Z-axis is 4.1L1; The Y-axis distance between the inflection point of the inner edge and the inflection point of the outer edge at the lower end of the blade is 0.61L1, and the Z-axis distance is 0.44L1; The distance between the inflection point of the inner edge at the lower end of the blade and the Z-axis is 2.2L1, and the distance from the Z100 height is 1.24L1.

[0092] like Figure 7 As shown, at section X375, the blade's Y-axis width is 0.63L1 at height Z300, and the blade distance from the Z-axis is 16.34L1; at height Z260, the blade's Y-axis width is 0.68L1, and the blade distance from the Z-axis is 15.8L1; at height Z220, the blade's Y-axis width is 0.75L1, and the blade distance from the Z-axis is 14.87L1; at height Z180, the blade's Y-axis width is 0.86L1, and the blade distance from the Z-axis is 13.38L1; at height Z140, the blade's Y-axis width is 1.1L1, and the blade distance from the Z-axis is 10.97L1; at height Z100, the blade's Y-axis width is 1.26L1, and the blade distance from the Z-axis is 7.4L1; at height Z60, the blade's Y-axis width is 0.56L1, and the blade distance from the Z-axis is 4.5L1.

[0093] like Figure 8 As shown, on section X405, the blade's Y-axis width is 0.58L1 at height Z300, and the blade distance from the Z-axis is 17.7L1; at height Z260, the blade's Y-axis width is 0.65L1, and the blade distance from the Z-axis is 17.4L1; at height Z220, the blade's Y-axis width is 0.7L1, and the blade distance from the Z-axis is 16.7L1; at height Z180, the blade's Y-axis width is 0.79L1, and the blade distance from the Z-axis is 15.6L1; at height Z140, the blade's Y-axis width is 0. At height Z100, the blade's Y-axis width is 1.26L1, and the blade's distance from the Z-axis is 10.78L1. At height Z60, the blade's Y-axis width is 1.26L1, and the blade's distance from the Z-axis is 7.15L1. The Y-axis distance between the inflection point of the inner and outer edges of the blade's lower edge is 0.59L1, and the Z-axis distance is 0.46L1. The distance between the inflection point of the inner edge of the blade's lower edge and height Z60 is 0.49L1, and the distance from the Z-axis is 6.44L1.

[0094] like Figure 9 As shown, in section X435: at height Z100, the blade's Y-axis width is 1.04L1, and the blade's distance from the Z-axis is 13.97L1; at height Z60, the blade's Y-axis width is 1.26L1, and the blade's distance from the Z-axis is 10.5L1; the distance between the upper outer edge of the blade and the Z-axis is 15.4L1; the distance between the lower inner edge inflection point of the blade and the Z-axis is 8.48L1, and the distance between it and height Z60 is 1.41L1; the Y-axis distance between the lower inner edge inflection point and the outer edge inflection point of the blade is 0.58L1, and the Z-axis distance is 0.47L1.

[0095] like Figure 10 As shown, on the X465 section: the outer edge of the blade is 11.46L1 from the Z-axis; the Y-axis distance between the outer edge inflection point and the inner edge inflection point at the lower end of the blade is 0.57L1, and the Z-axis distance is 0.47L1; the inner edge inflection point at the lower end of the blade is 10.48L1 from the Z-axis; and the distance between the outer edge inflection point at the lower end of the blade and the height of Z60 is 2.83L1.

[0096] In one embodiment, the tolerance range of the distance parameter is -10 to 10 mm. In another embodiment, the distance parameter has no tolerance.

[0097] Under the same operating conditions, the efficiency of the mixed-flow circulating water pump in this embodiment is increased from 61.6% to 74.3% compared to the axial-flow pump, showing a significant improvement. The calculation process is as follows:

[0098] Within the required flow range for cooling marine power systems Under the operating conditions, numerical simulation calculations were carried out at the following operating points, with flow rates of respectively... , , , , , , .

[0099] The head of the axial flow pump and the mixed flow pump under each operating condition is calculated using the following formulas. (unit ):

[0100] ,

[0101] For pump outlet pressure, unit ; For pump inlet pressure, unit ; For fluid outlet velocity, in units ; For fluid inlet velocity, in units ; is the pump outlet height, unit ; is the pump inlet height, unit ; is the density of the liquid being pumped, unit ; is the acceleration of gravity, unit .

[0102] According to the obtained head , the effective power of the axial flow pump and the mixed flow pump is calculated respectively , unit . The effective power calculation formula is:

[0103] ,

[0104] is the fluid density of the liquid being pumped, unit ; is the acceleration of gravity, unit ; is the fluid volume flow, unit .

[0105] Finally, the water pump efficiency calculation formula is:

[0106] ,

[0107] is the shaft power, unit .

[0108] The guide vane of the mixed flow pump is more smoothly transitioned in space. For the test working condition , the flow characteristics of the 25%, 50%, and 75% height directions in the flow passages of the mixed flow pump guide vane and the axial flow pump guide vane are obtained respectively in the numerical simulation calculation results, the static water pressure cloud maps are as shown in Figures 11 to 13 , and the turbulent kinetic energy cloud maps are as shown in Figures 14 to 16 . The pressure distribution of the mixed flow pump guide vane flow passage is uniform, the high pressure area in the axial flow pump guide vane flow passage is concentrated, and the pressure gradient is uneven. The turbulent kinetic energy reflects the turbulent intensity in the guide vane flow passage, the greater the turbulent kinetic energy, the more intense the vortex impact in the flow passage, and the greater the hydraulic loss. The maximum value of the turbulent kinetic energy on each section is shown in Table 1.

[0109] Table 1 Turbulent kinetic energy numerical table

[0110]

[0111] The turbulent kinetic energy concentration phenomenon appears along the flow direction in the guide vane of the mixed-flow pump and the axial-flow pump, but the maximum value of the turbulent kinetic energy of the mixed-flow pump is 0.646 , the maximum value of the axial-flow pump increases from 2.43 to 3.0 , and the turbulent kinetic energy of the axial-flow pump is more intense. In the turbulent kinetic energy cloud chart, the turbulent kinetic energy concentration in the flow passage of the guide vane of the axial-flow pump is intense, the dynamic and static interference is large, the flow is unstable, and finally leads to the reduction of the hydraulic efficiency; combined with the pressure cloud chart, the excessive turbulent kinetic energy leads to the formation of a local low-pressure area in the axial-flow pump, causes large hydraulic loss, and there is a risk of cavitation, finally leading to the reduction of the efficiency of the axial-flow pump; the turbulent kinetic energy of the flow passage of the guide vane of the mixed-flow pump is low, the flow is stable, the dynamic and static interference with the impeller is small, and the flow characteristics in the pump are obviously improved.

[0112] According to the numerical simulation results, the shaft power of the axial-flow pump and the mixed-flow pump under each working condition is obtained, and the efficiency finally calculated according to the pump head and efficiency calculation formula is shown in Table 2. The design of the guide vane blade profile of the type is suitable for the new mixed-flow pump impeller, the dynamic and static blades are matched, and the hydraulic efficiency of the mixed-flow pump is improved.

[0113] Table 2: Pump efficiency table at each flow rate

[0114]

[0115] Specific implementation method two: the circulating water pump suitable for the moving blade in the embodiment comprises: the circulating water pump guide vane suitable for the moving blade in the specific implementation method one, and further comprises: a circulating pump shell, a pump shaft 1, a screw 2, an upper shaft sleeve 3, an upper rubber bearing 4, an upper pump cover 5, a first half guide vane 6, an anti-corrosion shield 7, an anti-corrosion shield bolt 8, a lower rubber bearing 9, a bearing cover 10, a lower pump cover 11, a gasket 12, an inlet bellows 13, an impeller chamber 14, an outlet bellows 15, an upper pump body 16, a second half guide vane 17, a lower shaft sleeve 18, a lower pump body 19, a pump body fastening bolt 20, an impeller 21 and an impeller nut 22.

[0116] The impeller 21 is coaxially sleeved at the end of the pump shaft 1 and is fastened by the impeller nut 22. The upper shaft sleeve 3 and the lower shaft sleeve 18 on the upper part and the lower part of the pump shaft 1 are coaxially interference fitted with the pump shaft 1. After assembly, the two shaft sleeves are screwed with the pump shaft 1 by the screws 2 to form the circulating pump rotor, realizing anti-loosening and vibration reduction. The circulating pump rotor is vertically installed in the circulating pump housing. The circulating pump housing is sequentially from the inlet to the outlet (from bottom to top): the inlet bellows 13 and the impeller chamber 14 are the water inlet part, the lower pump body 19 and the lower pump cover 11 are fastened and sealed by the bolt and gasket, the upper part of the lower pump body 19 and the lower pump cover 11 is the upper pump body 16 and the upper pump cover 5, and the upper pump body 16 and the upper pump cover 5 are fastened and sealed by the bolt and gasket to form a closed chamber. The lower rubber bearing bush 9 is coaxially sleeved outside the lower shaft sleeve 18 of the circulating pump rotor. The lower shaft sleeve 18 and the lower rubber bearing bush 9 are gap fitted, and the gap value between the lower shaft sleeve 18 and the lower rubber bearing bush 9 needs to be ensured within the range of 0.5mm-0.6mm. The first half guide 6 and the second half guide 17 are installed through the stopper of the lower rubber bearing bush 9 and are fastened and connected by the bolt to be integrated. The upper rubber bearing bush 4 is coaxially sleeved outside the upper shaft sleeve 3 of the circulating pump rotor. The upper shaft sleeve 3 and the upper rubber bearing bush 4 are gap fitted, and the gap value between the upper shaft sleeve 3 and the upper rubber bearing bush 4 needs to be ensured within the range of 0.5mm-0.7mm. Two half water seal rings are installed on the upper part of the upper shaft sleeve 3 and are compressed by the packing, and the upper packing gland is fastened and screwed with the pump body by the bolt to be limited.

[0117] After the seawater is buffered by the inlet bellows 13, the seawater flows into the chamber composed of the lower pump body 19 and the lower pump cover 11 after working by the rotating impeller 21 in the impeller chamber 14. The first half guide 6 and the second half guide 17 in the chamber are provided with static blades. The profile design of the static blades plays a role in flow regulation in the flow passage, reduces the dynamic and static interference excitation, improves the flow characteristics in the pump, matches the dynamic blades of the impeller, and improves the use efficiency.

[0118] Although the present application is described herein with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present application. It is therefore to be understood that numerous modifications can be made to the illustrative embodiments and that other arrangements can be devised without departing from the spirit and scope of the present application as defined by the appended claims. It is to be understood that the features of the dependent claims can be combined with those of the parent application in any way deemed appropriate by a person skilled in the art. It is also to be understood that features described in relation to one embodiment can be used in other embodiments.

Claims

1. A circulating water pump guide vane adapted to the moving blades, including: The guide body and multiple stationary blades are evenly arranged around the circumference of the guide body and fixed on the outer circumferential surface of the guide body. Its characteristic is that a spatial rectangular coordinate system is constructed with the bottom center of the guide as the origin, the main axis of the guide is the Z-axis, the bottom plane of the guide is the XY plane, and along the Y-axis direction, the reference distance L1 is 220±10mm away from the Z-axis; Cross sections of the stationary blade were taken at multiple radial positions along the X-axis and parallel to the YZ plane. The X-axis coordinate values ​​of each cross section were 290±10mm, 315±10mm, 345±10mm, 375±10mm, 405±10mm, 435±10mm and 465±10mm, respectively. In each cross section, the width of the stationary blade along the Y-axis and its distance from the Z-axis, as well as multiple set heights along the Z-axis within the range of 60±10mm to 300±10mm, each had a value with a coefficient of L1. The blade profile exhibited a continuously changing geometric shape in the height direction, making the stationary blade as a whole constitute a spatial curved surface structure adapted to the flow channel of the moving blade. The multiple set heights along the Z-axis in the range of 60±10mm to 300±10mm are: 60±10mm, 100±10mm, 140±10mm, 180±10mm, 220±10mm, 260±10mm and 300±10mm, and are respectively denoted as Z60 height, Z100 height, Z140 height, Z180 height, Z220 height, Z260 height and Z300 height; In the section with an X-axis coordinate of 290±10mm: At a height of Z300, the Y-axis width of the stationary blade is 0.7L1, and the distance between the stationary blade and the Z-axis is 16.5L1. At a height of Z260, the Y-axis width of the stationary blade is 0.8L1, and the distance between the stationary blade and the Z-axis is 12.8L1. At height Z220, the Y-axis width of the stationary blade is L1, and the distance between the stationary blade and the Z-axis is 8.4L1. At height Z180, the distance from the inner edge of the stationary blade to the Z-axis is 7.4L1, the height of the inner edge of the stationary blade along the Z-axis is 0.9L1, and the distance between the upper end of the inner edge of the stationary blade and height Z220 is 0.85L1. In the section with an X-axis coordinate of 315±10mm: At a height of Z300, the Y-axis width of the stationary blade is 0.7L1, and the distance between the stationary blade and the Z-axis is 13.2L1. At a height of Z260, the Y-axis width of the stationary blade is 0.76L1, and the distance between the stationary blade and the Z-axis is 12.2L1. At height Z220, the Y-axis width of the stationary blade is 0.9L1, and the distance between the stationary blade and the Z-axis is 10.5L1; At a height of Z180, the Y-axis width of the stationary blade is 1.2L1, and the distance between the stationary blade and the Z-axis is 7.9L1. At a height of Z140, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 4.28L1. At height Z100, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 0.65L1. The distance between the inflection point of the lower outer edge of the stationary blade and the Y-axis is 0.62L1, and the distance between it and the height of Z100 is 0.9L1; In the section with an X-axis coordinate of 345±10mm: At a height of Z300, the Y-axis width of the stationary blade is 0.65L1, and the distance between the stationary blade and the Z-axis is 14.84L1; At a height of Z260, the Y-axis width of the stationary blade is 0.7L1, and the distance between the stationary blade and the Z-axis is 14.1L1. At height Z220, the Y-axis width of the stationary blade is 0.8L1, and the distance between the stationary blade and the Z-axis is 12.84L1; At a height of Z180, the width of the stationary blade along the Y-axis is 0.98L1, and the distance between the stationary blade and the Z-axis is 10.88L1. At a height of Z140, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 7.65L1. At height Z100, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 4.1L1. The Y-axis distance between the inflection point of the inner edge and the inflection point of the outer edge at the lower end of the stationary blade is 0.61L1, and the Z-axis distance is 0.44L1. The distance between the inflection point of the lower inner edge of the stationary blade and the Z-axis is 2.2L1, and the distance between the inflection point and the height of Z100 is 1.24L1; In the section with an X-axis coordinate of 375±10mm: At a height of Z300, the Y-axis width of the stationary blade is 0.63L1, and the distance between the stationary blade and the Z-axis is 16.34L1. At a height of Z260, the Y-axis width of the stationary blade is 0.68L1, and the distance between the stationary blade and the Z-axis is 15.8L1. At height Z220, the Y-axis width of the stationary blade is 0.75L1, and the distance between the stationary blade and the Z-axis is 14.87L1. At a height of Z180, the Y-axis width of the stationary blade is 0.86L1, and the distance between the stationary blade and the Z-axis is 13.38L1. At a height of Z140, the Y-axis width of the stationary blade is 1.1L1, and the distance between the stationary blade and the Z-axis is 10.97L1. At height Z100, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 7.4L1. At a height of Z60, the Y-axis width of the stationary blade is 0.56L1, and the distance between the stationary blade and the Z-axis is 4.5L1. In the section with an X-axis coordinate of 405±10mm: At a height of Z300, the Y-axis width of the stationary blade is 0.58L1, and the distance between the stationary blade and the Z-axis is 17.7L1. At a height of Z260, the Y-axis width of the stationary blade is 0.65L1, and the distance between the stationary blade and the Z-axis is 17.4L1. At height Z220, the Y-axis width of the stationary blade is 0.7L1, and the distance between the stationary blade and the Z-axis is 16.7L1. At a height of Z180, the Y-axis width of the stationary blade is 0.79L1, and the distance between the stationary blade and the Z-axis is 15.6L1. At a height of Z140, the Y-axis width of the stationary blade is 0.93L1, and the distance between the stationary blade and the Z-axis is 13.76L1. At height Z100, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 10.78L1. At height Z60, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 7.15L1. The Y-axis distance between the inflection point of the inner edge and the inflection point of the outer edge at the lower end of the stationary blade is 0.59L1, and the Z-axis distance is 0.46L1. The distance between the inflection point of the lower inner edge of the stationary blade and the height of Z60 is 0.49L1, and the distance from the Z-axis is 6.44L1; In the section with an X-axis coordinate of 435±10mm: At height Z100, the Y-axis width of the stationary blade is 1.04L1, and the distance between the stationary blade and the Z-axis is 13.97L1. At height Z60, the Y-axis width of the stationary blade is 1.26L1, and the distance between the stationary blade and the Z-axis is 10.5L1. The distance between the outer edge of the upper end of the stationary blade and the Z-axis is 15.4L1; The distance between the inflection point of the lower inner edge of the stationary blade and the Z-axis is 8.48L1, and the distance between it and the height of Z60 is 1.41L1; The Y-axis distance between the inflection point of the inner edge and the inflection point of the outer edge at the lower end of the stationary blade is 0.58L1, and the Z-axis distance is 0.47L1. In the section with an X-axis coordinate of 465±10mm: The distance from the outer edge of the stationary blade to the Z-axis is 11.46L1; The Y-axis distance between the inflection point of the outer edge and the inflection point of the inner edge at the lower end of the stationary blade is 0.57L1, and the Z-axis distance is 0.47L1. The inflection point of the lower inner edge of the stationary blade is 10.48L1 from the Z-axis; The distance between the inflection point of the lower outer edge of the stationary blade and the height of Z60 is 2.83L1.

2. The circulating water pump guide vane adapted to the moving blades according to claim 1, characterized in that, The Z60, Z100, Z140, Z180, Z220, Z260, and Z300 heights have Z-axis coordinates of 60mm, 100mm, 140mm, 180mm, 220mm, 260mm, and 300mm, respectively.

3. The circulating water pump guide vane adapted to moving blades according to claim 2, characterized in that, The X-axis coordinates of each section are 290mm, 315mm, 345mm, 375mm, 405mm, 435mm and 465mm, respectively.

4. The circulating water pump guide vane adapted to the moving blades according to claim 3, characterized in that, The reference distance L1 is 220mm from the Z-axis.

5. The circulating water pump guide vane adapted to the moving blades according to claim 4, characterized in that, The number of stationary blades is 5.

6. The circulating water pump guide vane adapted to moving blades according to claim 5, characterized in that, The guide body is made by combining a first half guide and a second half guide.

7. The circulating water pump guide vane adapted to moving blades according to claim 6, characterized in that, The first semi-guide and the second semi-guide are installed through the stop of the lower rubber bearing and are fastened together by bolts.

8. A circulating water pump adapted to moving blades, characterized in that, The circulating water pump includes the circulating water pump guide with adapted moving blades as described in any one of claims 1 to 7.

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