Circulating water pump guider adaptive to moving blade and circulating water pump

Abstract

The invention discloses a circulating water pump guider adaptive to moving blades and a circulating water pump and relates to the field of ship machinery. The problem that an existing guider cannot meet the flow use requirement of a brand new diagonal flow pump impeller is solved. The circulating water pump guider suitable for the moving blades comprises a guider body and a plurality of molded line stator blades, and the molded line stator blades are evenly distributed in the circumferential direction of the guider body and fixed to the outer circumferential face of the guider body. The circulating water pump adapting to the moving blade comprises the circulating water pump guider adapting to the moving blade.

Description

Technical Field

[0001] This application belongs to the field of marine machinery, and in particular relates to circulating water pump guides and circulating water pumps. Background Technology

[0002] With the increasing power of marine circulating water pump power systems, the required cooling seawater flow rate increases, and the head rises. Therefore, a marine mixed-flow circulating water pump needs to be designed within the existing space to improve hydraulic performance. The core of mixed-flow pump performance lies in the efficient matching of the impeller moving blades and the guide vanes. The guide vanes play a crucial role in converting the high-speed rotating fluid exiting the impeller into axial flow and rectifying it. Existing guide vanes need to address issues such as matching the dynamic and static profiles, setting the guide vane clearance, and coordinating with the moving blades in their design. Their current designs cannot meet the flow rate requirements of the new mixed-flow pump impeller. Summary of the Invention

[0003] This application addresses the problem that existing guide vanes cannot match the flow requirements of new mixed-flow pump impellers, and provides a circulating water pump guide vane and circulating water pump adapted to the moving blades.

[0004] The first aspect of this application provides a circulating water pump guide adapted to moving blades, comprising: a guide body and a plurality of stationary blades, wherein the plurality of stationary blades are evenly arranged along the circumference of the guide body and fixed on the outer circumferential surface of the guide body;

[0005] 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 the reference distance L1 is 220±10mm away from the Z-axis along the Y-axis.

[0006] 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.

[0007] In one possible design, the multiple set heights along the Z-axis in the range of 60±10mm to 300±10mm 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 one possible design, in a section with an X-axis coordinate of 290±10mm:

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

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

[0014] 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.

[0015] 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.

[0016] 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;

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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;

[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 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.

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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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;

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

[0049] 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.

[0050] 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.

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

[0052] 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;

[0053] 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.

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

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

[0056] 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.

[0057] The inflection point of the lower inner edge of the stationary blade is 10.48L1 from the Z-axis;

[0058] The distance between the inflection point of the lower outer edge of the stationary blade and the height of Z60 is 2.83L1.

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

[0060] In one possible design, the X-axis coordinates of the various sections 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 stationary blades is 5.

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

[0064] In one possible design, the first semi-guide and the second semi-guide are mounted via a stop on the lower rubber bearing and fastened together with bolts.

[0065] A second aspect of this application provides a circulating water pump with adaptable moving blades, the circulating water pump including the aforementioned circulating water pump guide with adaptable moving blades.

[0066] The beneficial effects of this application are:

[0067] The stationary blade profile of this application can be adapted to the moving blade, improving the flow characteristics inside the pump, reducing hydraulic losses, and improving the stability and efficiency of the pump. Attached Figure Description

[0068] Figure 1 This is a cross-sectional view of a mixed-flow circulating water pump.

[0069] Figure 2 This is a front view of the guide.

[0070] Figure 3 This is a top view of the guide.

[0071] Figure 4 This is a profile diagram of the X290 section;

[0072] Figure 5 This is a profile diagram of section X315;

[0073] Figure 6 This is a profile diagram of section X345;

[0074] Figure 7 This is a profile diagram of section X375;

[0075] Figure 8 This is a profile diagram of section X405;

[0076] Figure 9 This is a profile diagram of section X435;

[0077] Figure 10 This is a profile diagram of the X465 section;

[0078] Figure 11 The pressure cloud map is at 25% altitude, where (a) represents an axial flow pump and (b) represents a mixed flow pump;

[0079] Figure 12 The image shows a pressure cloud at 50% altitude, where (a) represents an axial flow pump and (b) represents a mixed flow pump.

[0080] Figure 13 The image shows a pressure cloud at 75% altitude, where (a) represents an axial flow pump and (b) represents a mixed flow pump.

[0081] Figure 14 The image shows the kinetic energy contour plot at 25% turbulence, where (a) represents an axial flow pump and (b) represents a mixed flow pump.

[0082] Figure 15 The image shows the kinetic energy contour map at 50% turbulence, where (a) represents an axial flow pump and (b) represents a mixed flow pump.

[0083] Figure 16 The image shows the kinetic energy contour plot at 75% turbulence, where (a) represents an axial flow pump and (b) represents a 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 10As shown. The seven profiled stationary blade sections are denoted as X290, X315, X345, X375, X405, X435, and X465, respectively, with distances from the YZ plane of 290mm, 315mm, 345mm, 375mm, 405mm, 435mm, and 465mm. Along the Y-axis, a reference distance L1 is taken at a distance of 220mm from the Z-axis. Along the Z-axis, seven heights are taken, denoted as Z60, Z100, Z140, Z180, Z220, Z260, and Z300, with distances from the XY plane of 60mm, 100mm, 140mm, 180mm, 220mm, 260mm, and 300mm, respectively.

[0089] like Figure 4 As shown, at the X290 section, the blade's Y-axis width is 0.7L1 at height Z300, and the blade is 16.5L1 from the Z-axis; at height Z260, the blade's Y-axis width is 0.8L1, and the blade is 12.8L1 from the Z-axis; at height Z220, the blade's Y-axis width is L1, and the blade is 8.4L1 from the Z-axis; at height Z180, the blade's inner edge is 7.4L1 from the Z-axis, the blade's inner edge thickness at the Z-axis is 0.9L1, and the distance from the upper end of the blade's inner edge to height Z220 is 0.85L1.

[0090] like Figure 5 As shown, on section X315, the blade's Y-axis width is 0.7L1 at height Z300, and the blade's distance from the Z-axis is 13.2L1; at height Z260, the blade's Y-axis width is 0.76L1, and the blade's distance from the Z-axis is 12.2L1; at height Z220, the blade's Y-axis width is 0.9L1, and the blade's distance from the Z-axis is 10.5L1; at height Z180, the blade's Y-axis width is 1.2L1, and the blade's distance from the Z-axis is 7.9L1; at height Z140, the blade's Y-axis width is 1.26L1, and the blade's distance from the Z-axis is 4.28L1; at height Z100, the blade's Y-axis width is 1.26L1, and the blade's distance from the Z-axis is 0.65L1; the distance between the blade's lower outer edge inflection point and the Y-axis is 0.62L1, and the distance between it and height Z100 is 0.9L1.

[0091] like Figure 6As 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 ; Pump outlet height, unit ; For pump inlet height, unit ; The unit is the density of the liquid being transported. ; For gravitational acceleration, in units .

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

[0103] ,

[0104] The fluid density of the transported liquid, in units ; For gravitational acceleration, in units ; Volumetric flow rate, unit .

[0105] Ultimately, the efficiency of the water pump The calculation formula is:

[0106] ,

[0107] Shaft power, unit .

[0108] The guide vanes of the mixed-flow pump have a smoother transition in their spatial design. (This is in response to the test conditions.) The flow characteristics in the 25%, 50%, and 75% height directions within the flow channels of the mixed-flow pump guide and the axial-flow pump guide were obtained from the numerical simulation results. The hydrostatic pressure contour maps are shown below. Figures 11 to 13 As shown, the turbulent kinetic energy cloud map is as follows: Figures 14 to 16 As shown. The pressure distribution in the guide vane channel of the mixed-flow pump is uniform, while the high-pressure zone in the guide vane channel of the axial-flow pump is concentrated, and the pressure gradient is uneven. Turbulent kinetic energy. The turbulent kinetic energy reflects the intensity of turbulence within the guide channel. The greater the turbulent kinetic energy, the more intense the vortex impacts within the channel, and the greater the hydraulic losses. The maximum turbulent kinetic energy at each cross-section is shown in Table 1.

[0109] Table 1 Turbulent Kinetic Energy Numerical table

[0110]

[0111] As the flow progresses, both mixed-flow and axial-flow pumps exhibit turbulent kinetic energy concentration along the flow channel inside the guide vane. However, the maximum turbulent kinetic energy of the mixed-flow pump is 0.646. The maximum value of the axial flow pump is 2.43. Increased to 3.0 Axial flow pumps exhibit more intense turbulent kinetic energy. In the turbulent kinetic energy cloud diagram, the turbulent kinetic energy in the guide vane channel of the axial flow pump is concentrated and intense, with large dynamic-static interference and unstable flow, ultimately leading to a decrease in hydraulic efficiency. Furthermore, combined with the pressure cloud diagram, excessive turbulent kinetic energy causes the formation of local low-pressure zones in the axial flow pump, resulting in significant hydraulic losses and a risk of cavitation, ultimately leading to a decrease in axial flow pump efficiency. In contrast, the turbulent kinetic energy in the guide vane channel of the mixed flow pump is lower, the flow is more stable, and there is less dynamic-static interference with the impeller, resulting in a significant improvement in the flow characteristics within the pump.

[0112] Based on the numerical simulation results, the shaft power of the axial flow pump and the mixed flow pump under various operating conditions was obtained. According to the pump head and efficiency calculation formulas, the final calculated efficiency is shown in Table 2. The design of the guide vane profile of this type of guide vane is adapted to the impeller of the new mixed flow pump, and the matching of dynamic and static blades improves the hydraulic efficiency of the mixed flow pump.

[0113] Table 2 Efficiency of Water Pumps at Different Flow Rates

[0114]

[0115] Specific Implementation Method Two: The circulating water pump adapted to the moving blades described in this implementation method includes: the circulating water pump guide device adapted to the moving blades described in Specific Implementation Method One, and further includes: a circulating pump housing, 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 device 6, an anti-corrosion protective plate 7, an anti-corrosion protective plate bolt 8, a lower rubber bearing 9, a bearing cover 10, a lower pump cover 11, a washer 12, an inlet bellows 13, an impeller chamber 14, an outlet bellows 15, an upper pump body 16, a second half guide device 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] Impeller 21 is coaxially sleeved at the end of pump shaft 1 and fastened by impeller nut 22. The upper shaft sleeve 3 and the lower shaft sleeve 18 of pump shaft 1 are coaxially interference-fitted with pump shaft 1. After assembly, both shaft sleeves are tightened to pump shaft 1 by screws 2 to form the circulating pump rotor, achieving anti-loosening and vibration reduction. The circulating pump rotor is vertically installed in the circulating pump housing. The circulating pump housing consists of the following parts from water inlet to water outlet (from bottom to top): inlet bellows 13 and impeller chamber 14 are the water inlet part; lower pump body 19 and lower pump cover 11 are fastened and sealed by bolts and washers; the upper part of lower pump body 19 and lower pump cover 11 is upper pump body 16 and upper pump cover 5, which are fastened and sealed by bolts and washers to form a closed chamber. A lower rubber bearing 9 is coaxially fitted onto the lower shaft sleeve 18 of the circulating pump rotor. The lower shaft sleeve 18 and the lower rubber bearing 9 have a clearance fit, and the clearance value between the lower shaft sleeve 18 and the lower rubber bearing 9 must be within the range of 0.5mm to 0.6mm. Outside the lower rubber bearing 9 are a first half-guide 6 and a second half-guide 17. The first half-guide 6 and the second half-guide 17 are installed through the stop of the lower rubber bearing 9 and then fastened together with bolts. An upper rubber bearing 4 is coaxially fitted onto the upper shaft sleeve 3 of the circulating pump rotor. The upper shaft sleeve 3 and the upper rubber bearing 4 have a clearance fit, and the clearance value between the upper shaft sleeve 3 and the upper rubber bearing 4 must be within the range of 0.5mm to 0.7mm. Two half-jointed water seal rings are installed on the upper part of the upper shaft sleeve 3 and pressed together with packing. The upper packing gland is bolted to the pump body and then locked in place.

[0117] After being buffered by the inlet bellows 13, seawater flows into the chamber composed of the lower pump body 19 and the lower pump cover 11 after the impeller 21 rotates in the impeller chamber 14 and does work. The first semi-guide 6 and the second semi-guide 17 in the chamber have stationary blades. The profile design of the stationary blades plays a straightening role in the flow channel, reducing dynamic and static interference excitation, improving the flow characteristics inside the pump, matching the impeller moving blades, and improving the efficiency of use.

[0118] While specific embodiments of this application have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of this application. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of this application as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described 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.

2. The circulating water pump guide vane adapted to the moving blades according to claim 1, characterized in that, 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.

3. The circulating water pump guide vane adapted to moving blades according to claim 2, characterized in that, 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.

4. The circulating water pump guide vane adapted to the moving blades according to claim 2, 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.

5. The circulating water pump guide vane adapted to the moving blades according to claim 4, characterized in that, The X-axis coordinates of each section are 290mm, 315mm, 345mm, 375mm, 405mm, 435mm and 465mm, respectively.

6. The circulating water pump guide vane adapted to moving blades according to claim 5, characterized in that, The reference distance L1 is 220mm from the Z-axis.

7. The circulating water pump guide vane adapted to moving blades according to claim 6, characterized in that, The number of stationary blades is 5.

8. The circulating water pump guide vane adapted to the moving blades according to claim 7, characterized in that, The guide body is formed by combining a first half guide and a second half guide.

9. The circulating water pump guide vane adapted to moving blades according to claim 8, 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.

10. 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 9.

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