CN202621427U - A high-efficiency impeller-type gas vibrator - Google Patents

Abstract

The utility model relates to a high-efficient impeller formula gas vibrator, including vibrator casing (1), its characterized in that: at least one pair of impellers driven by compressed air, namely a left impeller (21) and a right impeller (22), are arranged in a vibrator shell (1), the left impeller (21) and the right impeller (22) are respectively arranged on a left rotating shaft (31) and a right rotating shaft (32), a synchronous transmission machine is arranged on the left rotating shaft (31) and the right rotating shaft (32), the gravity center (A) of the left impeller (21) deviates from the shaft center (O1) of the left rotating shaft (31) to form an eccentric distance L1, the gravity center (B) of the right impeller (22) deviates from the shaft center (O2) of the right rotating shaft (32) to form an eccentric distance L2, the left impeller (21) and the right impeller (22) realize synchronous pure rolling through a synchronous transmission mechanism and have opposite rotating directions, so that eccentric forces on the left impeller (21) and the right impeller (22) can be partially or completely counteracted with each other in the X-axis direction and are superposed in the Y-axis direction to obtain larger directional vibration force, the vibration amplitude of the Y axis is improved, the vibration effect is good, the efficiency is higher, and the price is low.

Description

A high-efficiency impeller-type gas vibrator

1. Technical field

The utility model relates to a pneumatic element, in particular to an impeller type gas vibrator used in vibrating screen equipment.

2. Background technology

The structure of a traditional vibrating screen is shown in FIG. 1 , including a screen frame 01 , a screen 02 with openings on the screen frame 01 , and a vibration source 03 fixed on the screen frame 01 . Vibration source 03 adopts ultrasonic vibration source and gas vibrator. At present, the price of ultrasonic vibration source is relatively high, the vibration frequency is high, and the vibration effect is good, while the gas vibrator has poor vibration effect due to its small vibration frequency and amplitude. The price is lower.

When the existing gas vibrator drives the load to move, the load's movement trajectory is mostly an irregular curve, which cannot realize the directional linear movement of the load, consumes more useless work, and has lower efficiency.

3. Contents of the invention

The purpose of the utility model is to provide a high-efficiency impeller type gas vibrator, which has simple structure, low cost, large vibration amplitude, good vibration effect and high efficiency.

The utility model is achieved through the following technical solutions:

A high-efficiency impeller-type gas vibrator, including a vibrator housing, in which at least a pair of compressed air-driven impellers, namely the left impeller and the right impeller, are installed on the left rotating shaft and the right impeller, respectively. On the rotating shaft, the synchronous transmission is installed on the left rotating shaft and the right rotating shaft. The center of gravity of the left impeller deviates from the axis of the left rotating shaft to form an eccentricity L1, and the center of gravity of the right impeller deviates from the axis of the right rotating shaft to form an eccentricity L2. The left impeller and the right impeller The synchronous pure rolling is realized through the synchronous transmission mechanism and the rotation direction is opposite, so that the eccentric force on the left impeller and the right impeller can partially or completely cancel each other in the X-axis direction, and superimposed in the Y-axis direction to obtain a larger directional vibration force and improve Y-axis vibration amplitude.

The center of gravity of the above-mentioned left impeller and the center of gravity of the right impeller are symmetrical about the Y axis, and the eccentricity L1 is equal to the eccentricity L2.

The center of gravity of the left impeller and the center of gravity of the right impeller mentioned above are asymmetrical about the Y axis, the eccentricity L1 is not equal to the eccentricity L2, and the ratio of the two eccentricities is in the range of 0.8-1.

The absolute value of the difference between the above-mentioned synchronous angle θ1 of the center of gravity of the left impeller and the synchronous angle θ2 of the center of gravity of the right impeller is in the range of 0° to 60°.

The above-mentioned transmission mechanism includes a left gear and a right gear meshing with each other, and the left gear and the right gear are installed on the left rotating shaft and the right rotating shaft respectively.

The transmission mechanism mentioned above is that the transmission mechanism is a synchronous belt transmission or a chain transmission.

The above-mentioned vibrator housing is provided with three cavities, namely the lower cavity, the upper left cavity and the upper right cavity, wherein the lower cavity is equipped with a pair of meshing left and right gears, the upper left cavity and the upper right cavity A toothed left impeller and a right impeller are respectively housed inside.

The above-mentioned left impeller is provided with a lightening hole and an eccentric block, and the right impeller is provided with a lightening hole and an eccentric block. The left rotating shaft and the right rotating shaft are supported by rolling bearings on the end cover on the vibrator housing. The air intake holes are arranged on the symmetrical central planes of the left impeller and the right impeller, and the exhaust holes are arranged on a tangent plane parallel to the central plane of the air inlet hole and on the radius of impeller rotation.

The upper left cavity and the upper right cavity mentioned above are cylindrical cavities of equal size. There is a through hole between the upper left cavity and the lower cavity, and there is a through hole between the upper right cavity and the lower cavity. The through hole and the through hole The diameters are equal, the axes are coplanar and parallel, the upper left cavity and the through hole have the same circle center, and the upper right cavity and the through hole have the same circle center.

The above-mentioned end caps are cylindrical, and the end caps are respectively provided with bearing seat holes for installing rolling bearings.

The above-mentioned left impeller and right impeller are identical.

The beneficial effect that the utility model has:

(1) Use compressed air to enter the closed upper cavity of the gas vibrator shell from the air inlet, the thrust of the gas acts on the left impeller and the right impeller to rotate, and the left impeller and the right impeller realize synchronous pure rolling and rotation through the synchronous transmission mechanism The direction is opposite, so that the eccentric force on the left impeller and the right impeller can partially or completely cancel each other in the X-axis direction, and superimpose in the Y-axis direction to obtain a larger directional vibration force and increase the vibration amplitude of the Y-axis. The structure is simple and the cost is low. , large amplitude, good vibration effect, high efficiency, the price is equivalent to 1/20 of the ultrasonic vibrator, but the vibration amplitude is large, and the vibration effect produced is equivalent to that of the ultrasonic vibrator.

(2) The center of gravity of the left impeller and the right impeller are symmetrical about the Y axis, and the eccentricity L1 is equal to the eccentricity L2, so that the eccentric forces on the left impeller and the right impeller all cancel each other in the X-axis direction, and the Y-axis direction obtains the largest amplitude Effect.

(3) The center of gravity of the left impeller and the center of gravity of the right impeller are asymmetrical about the Y axis, the eccentricity L1 is not equal to the eccentricity L2, and the ratio of the two eccentricities is in the range of 0.8 to 1, or the synchronous angle θ1 of the left impeller’s center of gravity is the same as that of the right The absolute value of the difference between the center of gravity synchronous angle θ2 of the impellers is in the range of 0 to 60 degrees, so that the eccentric forces on the left impeller and the right impeller can partially cancel each other in the X-axis direction, and superimposed in the Y-axis direction to obtain a greater orientation Vibration force, increase the vibration amplitude of the Y axis.

(4) There are three cavities in the vibrator shell, which are the lower cavity, the upper left cavity and the upper right cavity. The lower cavity is equipped with a pair of meshing left and right gears. A toothed left impeller and a right impeller are installed respectively. The left impeller is provided with lightening holes and eccentric blocks, and the right impeller is provided with lightening holes and eccentric blocks. The left and right rotating shafts pass through the end cover on the vibrator shell. Rolling bearing support, the air intake hole on the vibrator shell is set on the symmetrical center plane of the left impeller and the right impeller, and the exhaust hole is set on the plane parallel to the central plane of the air intake hole and on the tangent plane of the impeller rotation radius. Due to the compression The air intake is on the symmetrical central plane of the two impellers, and the exhaust is arranged on the tangential plane parallel to the central plane of the air inlet hole and on the tangential plane of the impeller rotation radius. Equipped with an eccentric block, the impeller has the restriction effect of the meshing gear when rotating, so that the impeller rotates synchronously in opposite directions. The structure is simple, the installation and manufacture are easy, and the manufacturing cost is low.

(5) The shell of the vibrator adopts an open structure at the upper and lower ends, which is very convenient for processing and installation, and greatly saves processing costs. When any part is worn out, it can be easily replaced, thereby reducing the maintenance cost of the gas vibrator. Extended service life. At the same time, the impeller and the gear are arranged in two cavities, and the gap between the two cavities is sealed by the gear shaft, so that the compressed air can effectively act on the impeller, and the rotation of the gear will not affect the rotation of the impeller.

4. Description of drawings:

Fig. 1 is the structural representation of traditional vibrating screen;

Fig. 2 is a sectional view of the impeller type air vibrator of the present invention.

Fig. 3 is an A-A sectional view of a structure of Fig. 2 .

Fig. 4 is an A-A sectional view of another structure of Fig. 2 .

Fig. 5 is a sectional view of the shell of the gas vibrator of the present invention.

Fig. 6 is a sectional view of an end cap of the present invention.

Fig. 7 is a sectional view of another end cap of the present invention.

Fig. 8 is a schematic diagram of the principle of the utility model.

Fig. 9 is a force analysis diagram of Fig. 8 .

5. Specific implementation methods:

Below in conjunction with accompanying drawing, the embodiment of the present utility model will be further described:

As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, a high-efficiency impeller type gas vibrator includes a vibrator housing 1, inside the vibrator housing 1 At least one pair of impellers driven by compressed air is installed, that is, the left impeller 21 and the right impeller 22, the left impeller 21 and the right impeller 22 are respectively installed on the left shaft 31 and the right shaft 32, and the synchronous transmission is installed on the left shaft 31 and the right shaft 32 Above, the center of gravity A of the left impeller 21 deviates from the axis O1 of the left rotating shaft 31 to form an eccentricity L1, and the center of gravity B of the right impeller 22 deviates from the axis O2 of the right rotating shaft 32 to form an eccentricity L2. The left impeller 21 and the right impeller 22 are driven synchronously The mechanism realizes synchronous pure rolling and the direction of rotation is opposite, so that the eccentric forces on the left impeller 21 and the right impeller 22 can partially or completely cancel each other in the X-axis direction, and can be superimposed in the Y-axis direction to obtain a larger directional vibration force and improve the Y Axis vibration amplitude, Y-axis direction is the direction of vibration output.

When the center of gravity A of the left impeller 21 and the center of gravity B of the right impeller 22 are symmetrical about the Y axis, the eccentricity L1 is equal to the eccentricity L2, so that the eccentric forces on the left impeller and the right impeller all cancel each other in the X-axis direction, and the Y-axis direction obtains the maximum The amplitude effect, the loss is the least, the efficiency is the highest.

When the center of gravity A of the left impeller 21 and the center of gravity B of the right impeller 22 are asymmetrical about the Y axis, the eccentric distance L1 is not equal to the eccentric distance L2, and the ratio of the two eccentric distances is in the range of 0.8 to 1, so that the eccentricity of the left impeller and the right impeller The forces can partially cancel each other in the X-axis direction, and can be superimposed in the Y-axis direction to obtain a larger directional vibration force and increase the vibration amplitude of the Y-axis, but this is not the best solution.

When the difference between the synchronous angle θ1 of the center of gravity A of the left impeller 21 and the synchronous angle θ2 of the center of gravity B of the right impeller 22 is in the range of 0 to 60 degrees, the eccentric forces on the left impeller and the right impeller can partially cancel each other in the X-axis direction, Superimposed in the Y-axis direction, a larger directional vibration force can be obtained and the Y-axis vibration amplitude can be increased, but it is not the best solution.

The transmission mechanism includes a left gear 41 and a right gear 42 meshing with each other. The left gear 41 and the right gear 42 are installed on the left shaft 31 and the right shaft 32 respectively. The gears in this example are straight teeth; the tooth shape, module, number of teeth and gear thickness of a pair of meshing gears are exactly the same; the number of teeth of the gears is 8-25.

The above-mentioned vibrator housing 1 is provided with three cavities, namely the lower cavity 16, the upper left cavity 17 and the upper right cavity 18, wherein the lower cavity 16 is equipped with a pair of meshing left gear 41 and right gear 42, the upper left A toothed left impeller 21 and a right impeller 22 are installed in the cavity 17 and the upper right cavity 18 respectively. The left impeller 21 is provided with a lightening hole 211 and an eccentric block 212, and the right impeller 22 is provided with a lightening hole 221 and an eccentric block. 222, the left shaft 31 and the right shaft 32 are supported by the rolling bearing 5 on the end cover 6 on the vibrator housing 1, and the air inlet 14 on the vibrator housing 1 is located on the symmetrical center plane of the left impeller 21 and the right impeller 22 The upper and exhaust holes 15 are located parallel to the central plane of the air inlet 14 and on the tangential plane of the impeller rotation radius. The upper left cavity 17 and the upper right cavity 18 are cylindrical cavities of equal size, and the upper left cavity 17 is the same as the lower one. There is a through hole 191 between the cavity 16, there is a through hole 192 between the upper right cavity 18 and the lower cavity 16, the through hole 191 and the through hole 192 are equal in diameter, the axes are coplanar and parallel, the upper left cavity 17 and the through hole 191 is concentric, the upper right cavity 18 and the through hole 192 are concentric, and the end cap 6 is cylindrical, and the end cap 6 is respectively provided with a bearing seat hole 61 for installing the rolling bearing 5 . The center distance between the upper left cavity 17 and the upper right cavity 18 is the meshing center distance of the two gears. The number of lightening holes on the impeller is greater than or equal to 1, and the number of eccentric blocks is greater than or equal to 1. In this example, the number of lightening holes on the impeller is 3, and the number of eccentric blocks is 1. When installing, the impellers are installed one down and one upside down. . The gear shaft and the gear can be integrated; the transmission mechanism can also be a synchronous belt transmission or a chain transmission.

The above-mentioned left impeller 21 and right impeller 22 may be identical.

The vibrator shell 1 adopts an open structure at the upper and lower ends, which is very convenient for processing and installation, and greatly saves processing costs. When any part is worn out, it can be easily replaced, thereby reducing the maintenance cost of the gas vibrator and prolonging the service life . At the same time, the impeller and the gear are arranged in two independent cavities, and the gap between the two cavities is sealed by the gear shaft, so that the compressed air can effectively act on the impeller, and the rotation of the gear will not affect the rotation of the impeller, so that Directional vibrations are smoother.

The principle of the present utility model is: as shown in Figure 8 and Figure 9, the center of gravity A of the left impeller 21 deviates from the axis O1 of the left rotating shaft 31 to form an eccentricity L1, and the center of gravity B of the right impeller 22 deviates from the axis O2 of the right rotating shaft 32 to form The eccentricity L2, the left impeller 21 and the right impeller 22 realize synchronous pure rolling through the synchronous transmission mechanism and the rotation directions are opposite. The connection line of AO1 rotates counterclockwise around the axis O1, and the connection line of BO2 rotates clockwise around the axis O2. The absolute value of the difference between the synchronous angle θ1 of the center of gravity A of the impeller 21 and the synchronous angle θ2 of the center of gravity B of the right impeller 22 is in the range of 0 to 60 degrees; when the eccentricity L1 equals the eccentricity L2, the difference between the synchronous angle θ1 and the synchronous angle θ2 When the angle difference is 0, it is exactly symmetrical, so that the eccentric forces on the left impeller and the right impeller can all cancel each other in the X-axis direction, and superimposed in the Y-axis direction to obtain the maximum directional vibration force and increase the Y-axis vibration amplitude. The best solution to obtain the effect of directional linear motion.

When the eccentricity L1 is not equal to the eccentricity L2, there is a small gap between the two, or when the eccentricity L1 is equal to the eccentricity L2 and the angle difference between the synchronous angle θ1 and the synchronous angle θ2 is not 0, the force is in the direction of the vibration output The Y-axis direction is superimposed to obtain a larger directional vibration force and increase the Y-axis vibration amplitude, but there is still a certain force in the X-axis direction, forming a curved trajectory.

In Fig. 9, the center of gravity A of the left impeller 21 is rotated counterclockwise around the axis O1, and a force F1 is generated in the tangential direction, and the force F1 is decomposed into F3 and F5 on the X-axis and Y-axis; The center of gravity B rotates clockwise around the axis O2, generating force F2 in the tangential direction. The force F2 is decomposed into the forces F4 and F6 on the X-axis and Y-axis. The force F3 is close to the force F4, but the direction is opposite, so All or most of the force in the X-axis direction is offset. The force F5 and the force F6 are close in size and direction, and the Y-axis in the vibration output direction is superimposed, thereby obtaining a larger amplitude, although there is no increase in the vibration frequency. The vibration amplitude is greatly improved, the vibration effect is good, the efficiency is high, and the price is equivalent to 1/20 of the ultrasonic vibrator, but the vibration amplitude is large, and the vibration effect produced is equivalent to that of the ultrasonic vibrator.

Claims (10)

1. efficient vane type gas vibrator; Involving vibrations device housing (1); It is characterized in that: the minimum impeller that a pair of compressed air-driven is installed in vibrator housing (1) the inside, promptly lobus sinister wheel (21) and lobus dexter are taken turns (22), and lobus sinister wheel (21) and lobus dexter wheel (22) are installed in respectively on left rotary shaft (31) and the right spindle (32); The Synchronous Transmission machine is installed on left rotary shaft (31) and the right spindle (32); The axle center (O1) that the center of gravity (A) of lobus sinister wheel (21) departs from left rotary shaft (31) forms eccentric throw L1, and the axle center (O2) that the center of gravity (B) of lobus dexter wheel (22) departs from right spindle (32) forms eccentric throw L2, and lobus sinister wheel (21) and lobus dexter are taken turns (22) and realized that through synchronous drive mechanism synchronous pure rolling and direction of rotation are opposite; Eccentric force on lobus sinister wheel (21) and the lobus dexter wheel (22) can some or all ofly be cancelled out each other in X-direction; Stack up in Y direction, obtain bigger directional vibration power, improve the Y axis vibration amplitude.

2. a kind of efficient vane type gas vibrator according to claim 1 is characterized in that: the center of gravity (B) of the center of gravity (A) of lobus sinister wheel (21) and lobus dexter wheel (22) is about the Y axial symmetry, and eccentric throw L1 equals eccentric throw L2.

3. a kind of efficient vane type gas vibrator according to claim 1; It is characterized in that: the center of gravity (B) of the center of gravity (A) of lobus sinister wheel (21) and lobus dexter wheel (22) is asymmetric about the Y axle; The unequal eccentric throw L2 of eccentric throw L1, the ratio of two eccentric throws is in 0.8～1 scope.

4. a kind of efficient vane type gas vibrator according to claim 1 is characterized in that: the synchro angle θ 1 of the center of gravity (A) of lobus sinister wheel (21) and the scope of the absolute value of the difference of center of gravity (B) the synchro angle θ 2 of lobus dexter wheel (22) at 0～60 degree.

5. according to claim 1 or 2 or 3 or 4 described a kind of efficient vane type gas vibrators; It is characterized in that: transmission mechanism is to comprise intermeshing left gear (41) and right gear (42), and left gear (41) and right gear (42) are installed in respectively on left rotary shaft (31) and the right spindle (32).

6. according to claim 1 or 2 or 3 or 4 described a kind of efficient vane type gas vibrators, it is characterized in that: transmission mechanism is to be with transmission or chain drive synchronously.

7. a kind of efficient vane type gas vibrator according to claim 5; It is characterized in that: be provided with three die cavities in the vibrator housing (1); Be respectively lower impressions (16), upper left die cavity (17) and upper right die cavity (18); The left gear (41) and the right gear (42) of pair of meshing wherein are housed in the lower impressions (16), a toothed lobus sinister wheel (21) and lobus dexter wheel (22) is housed respectively in upper left die cavity (17) and the upper right die cavity (18).

8. a kind of efficient vane type gas vibrator according to claim 7; It is characterized in that: lobus sinister wheel (21) is provided with lightening core (211) and eccentric block (212); Lobus dexter wheel (22) is provided with lightening core (221) and eccentric block (222); Left rotary shaft (31) and right spindle (32) be through the supporting of the rolling bearing (5) on the end cap (6) on the vibrator housing (1), and to be located at that lobus sinister wheel (21) and lobus dexter are taken turns on the symmetrical centre face of (22), steam vent (15) is located at parallel with air admission hole (14) central plane and on the section of impeller radius of turn for the air admission hole (14) on the vibrator housing (1).

9. a kind of efficient vane type gas vibrator according to claim 7; It is characterized in that: upper left die cavity (17) and upper right die cavity (18) are equal-sized cylinder die cavity; One through hole (191) is arranged between the same lower impressions of upper left die cavity (17) (16), a through hole (192) is arranged between the same lower impressions of upper right die cavity (18) (16), through hole (191) equates with through hole (192) diameter, axle center coplane and parallel; Upper left die cavity (17) and through hole (191) concentric, upper right die cavity (18) and through hole (192) concentric.

10. a kind of efficient vane type gas vibrator according to claim 8, it is characterized in that: described end cap (6) is cylindrical, and end cap (6) is respectively equipped with the bearing saddle bore (61) that is used to install rolling bearing (5).

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