CN2030655U

CN2030655U - Machinery impeller vane with surface figure on it

Info

Publication number: CN2030655U
Application number: CN 87209562
Authority: CN
Inventors: 高歌; 苗润田; 唐智明
Original assignee: Shenyang Liming Machinery Co; Beijing Aeronaution College
Current assignee: Shenyang Liming Machinery Co; Beijing Aeronaution College
Priority date: 1987-06-30
Filing date: 1987-06-30
Publication date: 1989-01-11

Abstract

The utility model relates to a machinery impeller vane with a surface figure. The back of the vane and the surface of the vane basin can be provided with a 'u'-shaped groove line, a 'v'-shaped groove, a triangular projecting edge, or a fish-scale reticulate pattern; the air-current can reduce the flow loss through the vane surface, and the work efficiency of the impeller machinery can be improved.

Description

Machinery impeller vane with surface figure on it

Technical field is the turbomachine blade under the utility model.

Existing various turbomachine (comprises various gas compressors, turbo machine, ventilator, the fan water turbine, wing pump, wind turbines etc.) blade all adopts smooth surface, the surface finishment fitness for purpose gets high, the gentle kinetic theory of traditional fluid mechanics is thought, the smooth more flow resistance in its surface is more little during fluid process object, energy loss in the middle of flowing is also just more little, because modern various turbomachine blade major parts are moved under turbulent condition, recent theories and experimental study show that the trickle quasi-ordering vortex structure of turbulent drag and turbulent boundary layer inside has direct contact, the structural type of body surface can influence the generation of quasi-ordering vortex structure in the boundary layer, development and fragmentation.The non-smooth surface of special tectonic, the resistance in turbulence flow flied might be littler than the flow resistance of smooth surface.Done " about compressor blade surface-treated structure and test " according to this imagination Soviet Union, ask for an interview " aerodynamics of compressor blade row " book that China published in 1984, (Soviet Union FOM Te Leishenke work, Xu Jiaju translates) provide two types pilot blade in the book, a kind of is that carry out to big groove the blade back part, a kind of is that the blade back part adds exhibition to rib, draw from the experimental study conclusion: the test effect of these blades is all bad, therefore not having great use value, may be because the height and the unreasonable test effect that causes of local allocation of jog are undesirable according to one's analysis.

The purpose of this utility model is taked surperficial dapple turbomachine blade exactly, to reduce flow losses, improves turbomachine efficient.

The surface structure of turbomachine blade of the present utility model is provided by Fig. 1 to Fig. 6.Fig. 1 to Fig. 4 is that blade surface is the reticular structure schematic representation, wherein shown in Figure 1 is the reticular structure schematic representation, shown in Figure 2 is " U " type rill, shown in Figure 3 is " V " type groove, shown in Figure 4 is the triangle lug, nib, shown in Figure 5 is the structural representation that the surface is fish scale shape decorative pattern, and shown in Figure 6 is the stereogram of fish scale shape decorative pattern.

Sequence number 1 leading edge among the figure, 2 Right deviation groove center lines, 3 left-leaning groove center lines, 4 trailing edges, the 5 left and right line of rabbet joint angles that incline, 6 " U " type bottom radius, 7 groove height, 8 " V " type bottom land angle, 9 " V " type groove width, 10 triangle lug, nib angles, 11 triangle lug, nib bottom width, 12 triangle lug, nib height, 13 fish scale shape decorative pattern width, 14 fish scale shape decorative pattern radiuses, 15 line sheet thickness.

Following four tables are the geometric parameter of dissimilar blade surfaces:

Table one: " U " type rill (seeing Fig. 1 and Fig. 2)

5 left and right line of rabbet joint angle 6 " U " type bottom radius (mm) the 7 groove height (mm) that incline

0 ° of-150 ° of 0.025-1.5 0.05-3

Table two: " V " type groove (seeing Fig. 1 and Fig. 3)

5 left and right line of rabbet joint angle 7 groove height (mm) 8 " V " the type bottom land angles of inclining

30 °-90 ° of 0 ° of-150 ° of 0.05-3

Table three: triangle lug, nib (seeing Fig. 1 and Fig. 4)

The 5 left and right line of rabbet joint angle 10 triangle lug, nib angles 12 triangle lug, nib height (mm) that incline

0 °-150 ° 30 °-90 ° of 0.05-2

Table four: fish scale shape decorative pattern (seeing Fig. 5 and Fig. 6)

13 fish scale shape decorative pattern width (mm), 14 fish scale shape decorative pattern radiuses, 15 line sheet height (mm)

0.5-100 1-150 0.05-3

When the 5 left and right groove center lines that incline that provide in the last tabulation were 0 °, airflow direction was parallel with the line of rabbet joint.

The turbomachine blade that a kind of surface detail is arranged that provides from last tabulation, its blade back and leaf basin surface can be " U " type rill or " V " type groove or triangle lug, nib or fish scale shape decorative pattern.

It is the turbomachine blade on surface that the utility model embodiment adopts " U " type rill, and 5 left and rightly incline that angle is 90 ° between the line of rabbet joint, and 7 grooves height is 0.3mm, and 6 " U " type bottom radius is 0.15mm, respectively inclines between the line apart from being 3.5mm." U " type rill processing is in the WP-7(first) on the high pressure mechanism of qi blade testpieces, " U " type rill all shapes on the blade back at blade trailing edge to 2/3 arc length place, test is carried out in full court gas compressor wind-tunnel, test result, the WP-7(first that " U " type decorative pattern is arranged) blade with the WP-7(first of " U " type decorative pattern is not arranged) conclusion (of pressure testing) of blade is as follows: under the even inlet flow field of standard, there is the blade of " U " type decorative pattern to compare with the prototype blade, the efficient of gas compressor is improved, operation point flow and pressure ratio loss reduce, high-revolving surge margin is obviously reduced, under design speed, operation point efficient improves 2.9%, and surge margin reduces 0.1%.Other three kinds of evidences that have the decorative pattern blade to be done in cascade tunnel all can make critical M number improve about 5%, and the air-flow deflection angle increases 0.5 °-1 °, and surface isolation is postponed, and efficient has raising in various degree.

Processing method of the present utility model can adopt machining or electrochemical method to make, and also can adopt extruding or casting method, also can adopt line film stickup shaping or other method.

Claims

1, a kind of turbomachine blade that surface detail is arranged is characterized in that blade back and leaf basin surface can be " U " type rill or " V " groove or trigonometric form lug, nib or fish scale shape decorative pattern.

2, the turbomachine blade that surface detail is arranged according to claim 1, it is characterized in that 5 of " U " type rill left and rightly inclines line of rabbet joint angle between 0 °-150 °, 6 " U " type bottom radius is between 0.025mm-1.5mm, and 7 groove height are between 0.05mm-3mm.

3, the dapple turbomachine blade in surface according to claim 1, it is characterized in that " V " type groove 5 is left and right inclines line of rabbet joint angle between 0 °-150 °, and 7 groove height are between 0.05mm-3mm, and 8 " V " type bottom land angle is 30 °-90 °.

4, the dapple turbomachine blade in surface according to claim 1, it is characterized in that the triangle lug, nib 5 left and right line of rabbet joint angles that incline are between 0 °-150 °, 10 triangle lug, nib angles are 30 °-90 °, and 12 triangle lug, nib height are between 0.05mm-2mm.

5, according to claim 1 have the turbomachine blade of surface detail to it is characterized in that fish scale shape decorative pattern 13 fish scale shape decorative pattern width are between the 0.5mm-100mm, 14 fish scale shape decorative pattern radiuses are between the 1mm-150mm, and 15 line sheet height are between the 0.05mm-3mm.