High-pressure impeller with single-layer blades

Abstract

The utility model discloses a high-pressure impeller with single-layer blades. The impeller comprises blades, an impeller cover and an impeller disc, the impeller cover and the impeller disc are oppositely arranged at intervals, a plurality of blades which are arranged at equal intervals in the circumferential direction are arranged between the impeller cover and the impeller disc, the two ends of each blade are fixed to the impeller cover and the impeller disc, and a generatrix of the inner side face of the impeller cover is composed of an impeller cover molded line, a straight line section and an arc section connecting the impeller cover molded line and the straight line section. According to the impeller, the molded line of the impeller cover is optimally designed, so that the flowing of fluid can be optimized, the fluid can flow in the impeller more smoothly, the flowing resistance of the fluid can be reduced, the capability of the fluid passing through the impeller can be improved, the energy loss can be reduced, and the conversion efficiency of kinetic energy of the fluid can be improved; according to the utility model, the molded lines of the blades are optimally designed, so that the pressure loss of fluid in the impeller can be reduced, the pressure recovery capability of the whole system is improved, and the turbulence and oscillation of the fluid in the impeller can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of impellers, and in particular relates to a high-pressure impeller with single-layer blades. Background Art

[0002] The impeller is a key component of the fan, and the quality of the impeller directly affects the performance of the fan. During operation, when the airflow flows through the impeller cover, it will be subject to friction resistance and shape resistance. The friction resistance is caused by the viscosity of the fluid, and mainly occurs in a thin layer of fluid close to the inner wall of the impeller cover. This thin layer is called the boundary layer, and the shape resistance refers to the resistance generated when the boundary layer separates and produces vortices when the fluid bypasses the blades. The generation of vortices can easily cause airflow loss and pressure loss. In high-speed high-pressure fans, the airflow loss caused by vortices is greater, which in turn reduces the working efficiency of the high-pressure fan. At the same time, the pressure loss caused by vortices is also greater, which reduces the pressure recovery capacity of the high-pressure fan. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provides a high-pressure impeller with single-layer blades.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a high-pressure impeller with a single-layer blade, comprising blades, a wheel cover and a wheel disc, wherein the wheel cover and the wheel disc are arranged opposite to each other and at a distance, and a plurality of blades are arranged equidistantly along the circumferential direction between the wheel cover and the wheel disc, and the two ends of each blade are fixed to the wheel cover and the wheel disc; the profile fitting formula of the blade is:

[0006] y=0.0035x1 2 -0.4447x1-89.55

[0007] Among them, -12.56≤x1≤74.24;

[0008] The wheel cover is a body of revolution. The generatrix of the inner side of the wheel cover is composed of the wheel cover profile line, a straight line segment, and an arc segment connecting the wheel cover profile line and the straight line segment. The fitting formula of the wheel cover profile line is:

[0009] z = 8 × 10 -8 x2 6 -6×10 -5 x2 5 +0.0174x2 4 -2.7119x2 3 +236.89x2 2 -10989x2+211602

[0010] Among them, 88.96≤x2≤141.

[0011] Preferably, the fitting formula of the blade profile is replaced by:

[0012] y=0.0036x1 2 +0.4271x1-97.964

[0013] Among them, -19.84≤x1≤4.25;

[0014] The fitting formula of the wheel cover profile is replaced by:

[0015] z = 3 × 10 -8 x2 6 -3×10 -5 x2 5 +0.0086x2 4 -1.5111x2 3 +149.31x2 2 -7834.4x2+170695

[0016] Among them, 98.93≤x2≤157.

[0017] Preferably, the fitting formula of the blade profile is replaced by:

[0018] y=-0.0042x1 2 +0.5377x1+125.87

[0019] Among them, 111.35≤x1≤134.7;

[0020] The fitting formula of the wheel cover profile is replaced by:

[0021] z = 2 × 10 -8 x2 6 -2×10 -5 x2 5 +0.0057x2 4 -1.1335x2 3 +126.68x2 2 -7515.6x2+185071

[0022] Among them, 111.88≤x2≤180.

[0023] Preferably, the fitting formula of the blade profile is replaced by:

[0024] y=-0.003x1 2 -0.4642x1+132.61

[0025] Among them, -81.44≤x1≤52.5;

[0026] The fitting formula of the wheel cover profile is replaced by:

[0027] z = 9 × 10 -9 x2 6 -9×10 -6 x2 5 +0.004x2 4 -0.8896x2 3 +111.68x2 2 -7444.1x2+205971

[0028] Among them, 125.23≤x2≤201.5.

[0029] Preferably, the fitting formula of the blade profile is replaced by:

[0030] y=-0.0032x1 2 +0.5283x1+158.59

[0031] Among them, 122.94≤x1≤181.19;

[0032] The fitting formula of the wheel cover profile is replaced by:

[0033] z = 6 × 10 -9 x2 6 -6×10 -6 x2 5 +0.003x2 4 -0.7601x2 3 +107.49x2 2 -8071.2x2+251631

[0034] Among them, 142.18≤x2≤224.28.

[0035] Preferably, the fitting formula of the blade profile is replaced by:

[0036] y=0.0024x1 2 +0.48x1-166.44

[0037] Among them, -175.39≤x1≤-123.77;

[0038] The fitting formula of the wheel cover profile is replaced by:

[0039] z = 3 × 10 -9 x2 6 +4×10 -6 x2 5 +0.0023x2 4 +0.6606x2 3 +104.21x2 2+8732.8x2+303912

[0040] Among them, -248.47≤x2≤-159.03.

[0041] Preferably, the fitting formula of the blade profile is replaced by:

[0042] y = -2 × 10 -8 x1 5 -2×10 -5 x1 4 -0.0056x1 3 -0.9146x1 2 -74.146x1-2507.8

[0043] Among them, -62.55≤x1≤8.49;

[0044] The fitting formula of the wheel cover profile is replaced by:

[0045] z=10 -9 x2 6 +2×10 -6 x2 5 +0.0011x2 4 +0.3504x2 3 +62.374x2 2 +5894.2x2+231210

[0046] Among them, -283≤x2≤-176.48.

[0047] The utility model has the following beneficial effects:

[0048] The utility model can optimize the flow of fluid by optimizing the design of the wheel cover profile, making the flow of fluid inside the impeller smoother, reducing the resistance of fluid flow, thereby increasing the flow capacity, improving the ability of fluid to pass through the impeller, and reducing energy loss, improving the conversion efficiency of fluid kinetic energy, thereby improving the efficiency of the impeller, so that the impeller can still have a high work efficiency at a high speed (above 300 rpm). Furthermore, the utility model can reduce the pressure loss of fluid inside the impeller by optimizing the design of the blade profile, improve the pressure recovery capacity of the entire system, ensure that the fluid can pass through the impeller at a higher pressure, reduce the turbulence and oscillation of the fluid in the impeller, reduce the stress and fatigue of the impeller, and improve the reliability and service life of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0050] Figure 2 It is a schematic diagram of the cross section of the blade in the utility model;

[0051] Figure 3 It is a schematic diagram of the blade profile in the utility model;

[0052] Figure 4 It is a schematic diagram of the truncated position on the longitudinal section of the wheel cover of the utility model;

[0053] Figure 5 It is a schematic diagram of the wheel cover profile of the utility model. DETAILED DESCRIPTION

[0054] The utility model is further described below in conjunction with the accompanying drawings.

[0055] Embodiment 1: Figure 1 As shown, the utility model is a high-pressure impeller with a single-layer blade, model EC250 high-pressure impeller, including blades 1, a wheel cover 2 and a wheel disc 3, the wheel cover 2 and the wheel disc 3 are opposite to each other and are arranged at a distance, and a plurality of blades 1 are arranged equidistantly along the circumferential direction between the wheel cover 2 and the wheel disc 3, and both ends of each blade 1 are fixed to the wheel cover 2 and the wheel disc 3.

[0056] like Figure 2 and Figure 3 As shown in the figure, they are respectively a schematic diagram of the cross section of blade 1 and a schematic diagram of the blade profile of blade 1. The blade profile fitting formula is:

[0057] y=0.0035x1 2 -0.4447x1-89.55

[0058] Among them, -12.56≤x1≤74.24;

[0059] Such as 4 and Figure 5 As shown, the wheel cover 2 is a body of revolution, and the generatrix of the inner side of the wheel cover 2 is composed of the wheel cover profile line, the straight line segment, and the arc segment connecting the wheel cover profile line and the straight line segment. The fitting formula of the wheel cover profile line is:

[0060] z = 8 × 10 -8 x2 6 -6×10 -5 x2 5 +0.0174x2 4 -2.7119x2 3 +236.89x2 2 -10989x2+211602

[0061] Among them, 88.96≤x2≤141;

[0062] Embodiment 2: The difference between this embodiment and embodiment 1 is that the model is EC280 high-pressure impeller, and the fitting formula of the blade profile is replaced by:

[0063] y=0.0036x1 2 +0.4271x1-97.964

[0064] Among them, -19.84≤x1≤4.25;

[0065] The fitting formula of the wheel cover profile is replaced by:

[0066] z = 3 × 10 -8 x2 6 -3×10 -5 x2 5 +0.0086x2 4 -1.5111x2 3 +149.31x2 2 -7834.4x2+170695

[0067] Among them, 98.93≤x2≤157.

[0068] Embodiment 3: The difference between this embodiment and embodiment 1 is that the model is EC310 high-pressure impeller, and the fitting formula of the blade profile is replaced by:

[0069] y=-0.0042x1 2 +0.5377x1+125.87

[0070] Among them, 111.35≤x1≤134.7;

[0071] The fitting formula of the wheel cover profile is replaced by:

[0072] z = 2 × 10 -8 x2 6 -2×10 -5 x2 5 +0.0057x2 4 -1.1335x2 3 +126.68x2 2 -7515.6x2+185071

[0073] Among them, 111.88≤x2≤180.

[0074] Embodiment 4: The difference between this embodiment and embodiment 1 is that the model is EC355 high-pressure impeller, and the fitting formula of the blade profile is replaced by:

[0075] y=-0.003x1 2 -0.4642x1+132.61

[0076] Among them, -81.44≤x1≤52.5;

[0077] The fitting formula of the wheel cover profile is replaced by:

[0078] z = 9 × 10 -9 x2 6 -9×10 -6 x2 5 +0.004x2 4 -0.8896x2 3 +111.68x2 2 -7444.1x2+205971

[0079] Among them, 125.23≤x2≤201.5.

[0080] Embodiment 5: The difference between this embodiment and embodiment 1 is that the model is EC400 high-pressure impeller, and the fitting formula of the blade profile is replaced by:

[0081] y=-0.0032x1 2 +0.5283x1+158.59

[0082] Among them, 122.94≤x1≤181.19;

[0083] The fitting formula of the wheel cover profile is replaced by:

[0084] z = 6 × 10 -9 x2 6 -6×10 -6 x2 5 +0.003x2 4 -0.7601x2 3 +107.49x2 2 -8071.2x2+251631

[0085] Among them, 142.18≤x2≤224.28.

[0086] Embodiment 6: The difference between this embodiment and embodiment 1 is that the model is EC450 high-pressure impeller, and the fitting formula of the blade profile is replaced by:

[0087] y=0.0024x1 2 +0.48x1-166.44

[0088] Among them, -175.39≤x1≤-123.77;

[0089] The fitting formula of the wheel cover profile is replaced by:

[0090] z = 3 × 10 -9 x26 +4×10 -6 x2 5 +0.0023x2 4 +0.6606x2 3 +104.21x2 2 +8732.8x2+303912

[0091] Among them, -248.47≤x2≤-159.03.

[0092] Embodiment 7: The difference between this embodiment and embodiment 1 is that the model is EC500 high pressure impeller, and the fitting formula of the blade profile is replaced by:

[0093] y = -2 × 10 -8 x1 5 -2×10 -5 x1 4 -0.0056x1 3 -0.9146x1 2 -74.146x1-2507.8

[0094] Among them, -62.55≤x1≤8.49;

[0095] The fitting formula of the wheel cover profile is replaced by:

[0096] z=10 -9 x2 6 +2×10 -6 x2 5 +0.0011x2 4 +0.3504x2 3 +62.374x2 2 +5894.2x2+231210

[0097] Among them, -283≤x2≤-176.48.

Claims

1. A high-pressure impeller with a single-layer blade, comprising blades, a wheel cover and a wheel disc, wherein the wheel cover and the wheel disc are arranged opposite to each other and at a distance, and a plurality of blades are arranged equidistantly along the circumferential direction between the wheel cover and the wheel disc, and both ends of each blade are fixed to the wheel cover and the wheel disc, characterized in that: The profile fitting formula of the blade is: y=0.0035x1 2 -0.4447x1-89.55 Among them, -12.56≤x1≤74.24; The wheel cover is a body of revolution. The generatrix of the inner side of the wheel cover is composed of the wheel cover profile line, a straight line segment, and an arc segment connecting the wheel cover profile line and the straight line segment. The fitting formula of the wheel cover profile line is: <h2 style=";text-align:left;direction:ltr">z = 8×10<h2 style=";text-align:left;direction:ltr"> -8 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 6 <h2 style=";text-align:left;direction:ltr"> -6×10<h2 style=";text-align:left;direction:ltr"> -5 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 5 <h2 style=";text-align:left;direction:ltr"> +0.0174x2<h2 style=";text-align:left;direction:ltr"> 4 <h2 style=";text-align:left;direction:ltr"> -2.7119x2<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> +236.89x2<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> -10989x2+211602 Among them, 88.96≤x2≤141.

2. A high-pressure impeller with a single blade according to claim 1, characterized in that: The fitting formula of the blade profile is replaced by: y=0.0036x1 2 +0.4271x1-97.964 Among them, -19.84≤x1≤4.25; The fitting formula of the wheel cover profile is replaced by: <h2 style=";text-align:left;direction:ltr">z = 3×10<h2 style=";text-align:left;direction:ltr"> -8 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 6 <h2 style=";text-align:left;direction:ltr"> -3×10<h2 style=";text-align:left;direction:ltr"> -5 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 5 <h2 style=";text-align:left;direction:ltr"> +0.0086x2<h2 style=";text-align:left;direction:ltr"> 4 <h2 style=";text-align:left;direction:ltr"> -1.5111x2<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> +149.31x2<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> -7834.4x2+170695 Among them, 98.93≤x2≤157.

3. The high-pressure impeller with a single blade layer according to claim 1, characterized in that: The fitting formula of the blade profile is replaced by: y=-0.0042x1 2 +0.5377x1+125.87 Among them, 111.35≤x1≤134.7; The fitting formula of the wheel cover profile is replaced by: <h2 style=";text-align:left;direction:ltr">z = 2×10<h2 style=";text-align:left;direction:ltr"> -8 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 6 <h2 style=";text-align:left;direction:ltr"> -2×10<h2 style=";text-align:left;direction:ltr"> -5 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 5 <h2 style=";text-align:left;direction:ltr"> +0.0057x2<h2 style=";text-align:left;direction:ltr"> 4 <h2 style=";text-align:left;direction:ltr"> -1.1335x2<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> +126.68x2<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> -7515.6x2+185071 Among them, 111.88≤x2≤180.

4. The high-pressure impeller with a single blade layer according to claim 1, characterized in that: The fitting formula of the blade profile is replaced by: y=-0.003x1 2 -0.4642x1+132.61 Among them, -81.44≤x1≤52.5; The fitting formula of the wheel cover profile is replaced by: <h2 style=";text-align:left;direction:ltr">z = 9×10<h2 style=";text-align:left;direction:ltr"> -9 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 6 <h2 style=";text-align:left;direction:ltr"> -9×10<h2 style=";text-align:left;direction:ltr"> -6 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 5 <h2 style=";text-align:left;direction:ltr"> +0.004x2<h2 style=";text-align:left;direction:ltr"> 4 <h2 style=";text-align:left;direction:ltr"> -0.8896x2<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> +111.68x2<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> -7444.1x2+205971 Among them, 125.23≤x2≤201.

5.

5. The high-pressure impeller with a single blade layer according to claim 1, characterized in that: The fitting formula of the blade profile is replaced by: y=-0.0032x1 2 +0.5283x1+158.59 Among them, 122.94≤x1≤181.19; The fitting formula of the wheel cover profile is replaced by: <h2 style=";text-align:left;direction:ltr">z = 6×10<h2 style=";text-align:left;direction:ltr"> -9 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 6 <h2 style=";text-align:left;direction:ltr"> -6×10<h2 style=";text-align:left;direction:ltr"> -6 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 5 <h2 style=";text-align:left;direction:ltr"> +0.003x2<h2 style=";text-align:left;direction:ltr"> 4 <h2 style=";text-align:left;direction:ltr"> -0.7601x2<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> +107.49x2<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> -8071.2x2+251631 Among them, 142.18≤x2≤224.

28.

6. The high-pressure impeller with a single blade layer according to claim 1, characterized in that: The fitting formula of the blade profile is replaced by: y=0.0024x1 2 +0.48x1-166.44 Among them, -175.39≤x1≤-123.77; The fitting formula of the wheel cover profile is replaced by: <h2 style=";text-align:left;direction:ltr">z = 3×10<h2 style=";text-align:left;direction:ltr"> -9 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 6 <h2 style=";text-align:left;direction:ltr"> +4×10<h2 style=";text-align:left;direction:ltr"> -6 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 5 <h2 style=";text-align:left;direction:ltr"> +0.0023x2<h2 style=";text-align:left;direction:ltr"> 4 <h2 style=";text-align:left;direction:ltr"> +0.6606x2<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> +104.21x2<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> +8732.8x2+303912 Among them, -248.47≤x2≤-159.

03.

7. The high-pressure impeller with a single blade layer according to claim 1, characterized in that: The fitting formula of the blade profile is replaced by: y=-2×10 -8 x1 5 -2×10 -5 x1 4 -0.0056x1 3 -0.9146x1 2 -74.146x1-2507.8 Among them, -62.55≤x1≤8.49; The fitting formula of the wheel cover profile is replaced by: <h2 style=";text-align:left;direction:ltr">z=10<h2 style=";text-align:left;direction:ltr"> -9 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 6 <h2 style=";text-align:left;direction:ltr"> +2×10<h2 style=";text-align:left;direction:ltr"> -6 <h2 style=";text-align:left;direction:ltr"> x2<h2 style=";text-align:left;direction:ltr"> 5 <h2 style=";text-align:left;direction:ltr"> +0.0011x2<h2 style=";text-align:left;direction:ltr"> 4 <h2 style=";text-align:left;direction:ltr"> +0.3504x2<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> +62.374x2<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> +5894.2x2+231210 Among them, -283≤x2≤-176.48.

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