A surface blade of a shot blasting machine

Abstract

A curved blade of a shot blasting machine. The present invention relates to the technical field of mechanical equipment. It includes a blade body. One side of the blade body is a working surface, and the side opposite to the working surface is a non-working surface. Both the working surface and the non-working surface are arc surface structures, and the center of the non-working surface of the non-working surface is located above the right side of the center of the working surface of the working surface. Upper and lower side eaves are respectively provided on the upper and lower sides of the working surface. An upper side sharp corner is provided at the tail of the upper side eaves, and a lower side sharp corner is provided at the tail of the lower side eaves. It is beneficial to air circulation, not easy to generate eddy currents and thus cause air pressure pulsation, and reduce noise.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and particularly relates to a curved blade of a shot blasting machine. Background Art

[0002] Shot blasting technology is a typical mechanical surface treatment process, which has been widely used in surface cleaning and strengthening of mechanical products at present. Similar processes include shot peening and sandblasting. The core component of a shot blasting machine is the blade. At present, the blades on the market are mainly divided into flat straight blades, curved blades, and curved and straight combined blades. Although the blades are different, their thicknesses are uniform and unchanged, and the relationship between the blade structure and noise generation is not considered. As a consumable part, the service life of the blade is a major issue to be considered. In addition, the magnitude of the noise generated during the high-speed operation of the blade is also closely related to the blade structure parameters. Moreover, in order to enable the steel shot to fly out smoothly from the blade tail to obtain the highest speed, a reasonable design of the blade structure is also required.

[0003] Chinese Patent Document CN201120356413.5 discloses a shot blasting machine blade, characterized in that vertical blade flanges are provided on both sides of the straight blade, so that after one side of the blade is worn out, it can be removed and the other side can be used as the working surface to continue using, so as to achieve the purpose of high utilization rate and extended service life. In fact, blade wear failure often occurs at the end of the blade, manifested as severe deformation of the blade and the appearance of pits; when using the other side, the overall blade imbalance of the shot blasting machine is greatly increased, which will reduce the overall service life of the shot blasting machine, such as accelerating the failure of the impeller disc. In addition, there is a phenomenon that the steel shot bounces back and forth between the blades. Adding flanges to the back of the blade easily changes the direction of the steel shot speed, intensifies the collision between the steel shot and the steel shot, and between the steel shot and the blade, which will not only reduce the service life of the blade, but also affect the throwing speed of the steel shot. Summary of the Invention

[0004] The purpose of the present invention is to provide a curved blade of a shot blasting machine in view of the defects and deficiencies of the prior art, which is beneficial to air circulation, not easy to generate eddy currents and thus cause air pressure pulsation, and reduce noise.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: It includes a blade body. One side of the blade body is the working surface, and the side opposite to the working surface is the non-working surface. Both the working surface and the non-working surface are arc surface structures, and the center of the non-working surface of the non-working surface is located above the right side of the center of the working surface of the working surface; upper and lower side eaves are respectively provided on the upper and lower sides of the working surface, and an upper side sharp corner is provided at the tail of the upper side eave, and a lower side sharp corner is provided at the tail of the lower side eave.

[0006] Preferably, the distance between the left end point and the right end point of the head of the blade body is 13-15 mm, and both are on a circle with a radius of 63-65 mm. The left end point and the right end point of the head are symmetrically arranged with respect to the first vertical center line passing through the center of the circle with a radius of 63-65 mm.

[0007] Preferably, the distance between the left end point and the right end point of the tail of the blade body is 17.5-19.5 mm, and both are on a circle with a radius of 189-191 mm. The center of the circle with a radius of 189-191 mm coincides with the center of the circle with a radius of 63-65 mm.

[0008] Preferably, the right end point of the head is on the second vertical center line, which is on the right side of the first vertical center line and is 6.5-7.5 mm apart.

[0009] Preferably, the arc surface of the working surface is tangent to the above-mentioned second vertical center line.

[0010] Preferably, the radius of curvature of the working surface is 202-203 mm.

[0011] Preferably, the radius of curvature of the non-working surface is 208-209 mm.

[0012] Preferably, the horizontal distance between the first vertical center line and the center of the non-working surface is 406-408 mm.

[0013] Preferably, the upper side brim is an arc surface structure, the radius of curvature of its outer edge is 399-401 mm, the center of the arc surface structure of the upper side brim coincides with the center of the working surface, and the thickness of the upper side brim is 2-3 mm.

[0014] Preferably, the lower side brim is the part formed by the connection line between the two end points of the outer edges of the head and the tail of the bottom surface of the blade body and the working surface, and the thickness of the lower side brim is 2-3 mm.

[0015] Preferably, the upper side sharp angle and the lower side sharp angle are arranged in the same vertical plane, and the included angle between the hypotenuse where the upper side sharp angle is located and the horizontal side of the upper tail of the blade body is 120°.

[0016] The present invention adopts working surfaces and non-working surfaces with non-concentric circular arc surface structures, which not only makes the blade body better in receiving steel shots, but also reduces the noise of the curved surface structure compared with the straight blade structure. The thickness of the blade body gradually changes from the head to the tail, thereby increasing the service life of the blade body. The setting of the upper and lower brims greatly reduces the derailment rate of the steel shots and increases the overall throwing speed of the steel shots. The setting of the upper and lower sharp corners is more conducive to air circulation, and is not easy to generate eddy currents and cause air pressure pulsation, resulting in reduced noise.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The working and non-working surfaces of the non-concentric arc surface structure not only make the blade body better at receiving steel shots, but also the curved surface structure has lower noise than the straight blade structure. It also shows that the thickness of the blade body gradually changes from the head to the tail, which increases the service life of the blade body.

[0019] 2. The setting of the upper and lower brims greatly reduces the derailment rate of steel shots and increases the overall throwing speed of steel shots;

[0020] 3. The setting of the upper and lower sharp corners is more conducive to air circulation, and it is not easy to generate eddy currents and cause air pressure pulsation, which results in reduced noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a top view of the present invention.

[0023] Description of reference numerals:

[0024] Blade body 1, lower brim 2, lower sharp corner 3, working surface 4, upper brim 5, upper sharp corner 6, non-working surface 7, left end point of head 8, right end point of head 9, center of working surface 10, center of non-working surface 11, left end point of tail 12, right end point of tail 13, second vertical center line 14, first vertical center line 15, hypotenuse 16, horizontal edge 17. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0026] like Figure 1 - Figure 2As shown in the figure, the following technical solution is adopted in this specific embodiment: It includes a blade body 1 with a height of 77 - 81 mm. One side of the blade body 1 is a working surface 4, and the side opposite to the working surface 4 is a non - working surface 7. Both the working surface 4 and the non - working surface 7 are arc - surface structures, and the non - working surface center 11 of the non - working surface 7 is located above and to the right of the working surface center 10 of the working surface 4. Upper side eaves 5 and lower side eaves 2 are respectively provided at the upper and lower sides of the working surface 4. An upper side sharp corner 6 is provided at the tail of the upper side eaves 5, and a lower side sharp corner 3 is provided at the tail of the lower side eaves 2. The distance between the left head end point 8 and the right head end point 9 of the blade body 1 is 13 - 15 mm, and both are on a circle with a radius of 63 - 65 mm. The left head end point 8 and the right head end point 9 are symmetrically arranged with respect to the first vertical center line 15 passing through the center of the circle with a radius of 63 - 65 mm. The distance between the left tail end point 12 and the right tail end point 13 of the blade body 1 is 17.5 - 19.5 mm, and both are on a circle with a radius of 189 - 191 mm. The center of the circle with a radius of 189 - 191 mm coincides with the center of the circle with a radius of 63 - 65 mm. The right head end point 9 is located on the second vertical center line 14. The second vertical center line 14 is located to the right of the first vertical center line 15 and is 6.5 - 7.5 mm apart. The arc - surface of the working surface 4 is tangent to the second vertical center line 14. The radius of curvature of the working surface 4 is 202 - 203 mm. The radius of curvature of the non - working surface 7 is 208 - 209 mm. The horizontal distance between the first vertical center line 15 and the non - working surface center 11 is 406 - 408 mm. The upper side eaves 5 is an arc - surface structure, and the radius of curvature of its outer edge is 399 - 401 mm. The center of the arc - surface structure of the upper side eaves 5 coincides with the working surface center 10, and the thickness of the upper side eaves 5 is 2 - 3 mm. The lower side eaves 2 is the part formed by the connection line between the two end points of the outer edges of the head and tail of the bottom surface of the blade body 1 and the working surface 4, and the thickness of the lower side eaves 2 is 2 - 3 mm. The upper side sharp corner 6 and the lower side sharp corner 3 are located in the same vertical plane, and the included angle between the hypotenuse 16 where the upper side sharp corner 6 is located and the horizontal side 17 of the upper tail of the blade body 1 is 120°.

[0027] Install 6 - 8 blade bodies 1 on the impeller disc. The use of the working surface 4 and the non - working surface 7 with non - concentric arc - surface structures not only enables the blade body 1 to have better performance in receiving steel shots, and the curved - surface structure has lower noise compared with the straight - blade structure, but also shows that the thickness of the blade body 1 gradually changes from the head to the tail, improving the service life of the blade body 1. The setting of the upper side eaves 5 and the lower side eaves 2 greatly reduces the derailment rate of the steel shots and increases the overall throwing speed of the steel shots. The setting of the upper side sharp corner 6 and the lower side sharp corner 3 is more conducive to air circulation, not easily generating eddy currents and thus causing air pressure pulsations, and the resulting performance is noise reduction.

[0028] Compared with the prior art, the beneficial effects of this specific implementation are:

[0029] 1. The working and non-working surfaces of the non-concentric arc surface structure not only make the blade body better at receiving steel shots, but also the curved surface structure has lower noise than the straight blade structure. It also shows that the thickness of the blade body gradually changes from the head to the tail, which increases the service life of the blade body.

[0030] 2. The setting of the upper and lower brim greatly reduces the derailment rate of steel shots and increases the overall throwing speed of steel shots;

[0031] 3. The setting of the upper and lower sharp corners is more conducive to air circulation, and it is not easy to generate eddy currents and cause air pressure pulsation, which results in reduced noise.

[0032] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A curved blade for a shot blasting machine, characterized in that: it includes a blade body (1), one side of the blade body (1) is a working surface (4), and the side opposite to the working surface (4) is a non-working surface (7). Both the working surface (4) and the non-working surface (7) are arc surface structures, and the center (11) of the non-working surface of the non-working surface (7) is located above and to the right of the center (10) of the working surface of the working surface (4); upper and lower side eaves (5) and (2) are respectively provided on the upper and lower sides of the working surface (4). The tail of the upper side eaves (5) is provided with an upper side sharp angle (6), and the tail of the lower side eaves (2) is provided with a lower side sharp angle (3); the distance between the left end point (8) and the right end point (9) of the head of the blade body (1) is 13 - 15 mm, and both are on a circle with a radius of 63 - 65 mm. The left end point (8) and the right end point (9) of the head are symmetrically arranged with respect to the first vertical center line (15) passing through the center of the circle with a radius of 63 - 65 mm; the distance between the left end point (12) and the right end point (13) of the tail of the blade body (1) is 17.5 - 19.5 mm, and both are on a circle with a radius of 189 - 191 mm. The center of the circle with a radius of 189 - 191 mm coincides with the center of the circle with a radius of 63 - 65 mm; the upper side eaves (5) is an arc surface structure, the curvature radius of its outer edge is 399 - 401 mm, and the center of the arc surface structure of the upper side eaves (5) coincides with the center (10) of the working surface, and the thickness of the upper side eaves (5) is 2 - 3 mm; the lower side eaves (2) is the part formed by the connection line between the two end points of the outer edge of the head and the tail of the bottom surface of the blade body (1) and the working surface (4), and the thickness of the lower side eaves (2) is 2 - 3 mm.

2. The curved blade for a shot blasting machine according to claim 1, characterized in that: the right end point (9) of the head is located on the second vertical center line (14), the second vertical center line (14) is located on the right side of the first vertical center line (15) and is 6.5 - 7.5 mm apart; the arc surface of the working surface (4) is tangent to the second vertical center line (14).

3. The curved blade for a shot blasting machine according to claim 1, characterized in that: the curvature radius of the working surface (4) is 202 - 203 mm.

4. The curved blade for a shot blasting machine according to claim 1, characterized in that: the curvature radius of the non-working surface (7) is 208 - 209 mm.

5. The curved blade for a shot blasting machine according to claim 1, characterized in that: the horizontal distance between the first vertical center line (15) and the center (11) of the non-working surface is 406 - 408 mm.

6. The curved blade for a shot blasting machine according to claim 1, characterized in that: the upper side sharp angle (6) and the lower side sharp angle (3) are arranged in the same vertical plane, and the included angle between the hypotenuse (16) where the upper side sharp angle (6) is located and the horizontal side (17) of the upper tail of the blade body (1) is 120°.

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