Impeller assembly and mixing apparatus
The present application discloses an impeller assembly and a mixing apparatus, and relates to the technical field of solid and liquid mixing devices. The impeller assembly includes an impeller structure and a housing structure. The impeller structure includes a body, and a surface of the body is provided with a plurality of backward-skewed blades. A blade angle of each backward-skewed blade on any flow plane first decreases progressively and then increases progressively from an inlet to an outlet. A first baffle is disposed on a lower portion of the body. The housing structure includes a second baffle. The first baffle is provided with first guide slots, and the second baffle is provided with second guide slots. A fluid enters from the inlet at an upper portion of the body, flows along the surface of the body, and flows out through the outlet at a lower portion of the body and through the first guide slots and the second guide slots. A centerline of each first guide slot is deflected towards a direction opposite to a rotation direction of the impeller structure, and a centerline of each second guide slot is deflected towards the rotation direction of the impeller structure. The present application solves the problems of unstable discharge, large vibration and noise, and insufficient work efficiency.
1. An impeller assembly, comprising:
an impeller structure and a housing structure that are rotatable relative to each other,
wherein
the impeller structure comprises a body, a surface of the body is provided with a plurality of backward-skewed blades distributed circumferentially around the body, at least one layer of a first baffle is provided on a lower portion of the body, and the at least one layer of the first baffle is arranged on an outer side of the backward-skewed blades;
the housing structure comprises at least one layer of a second baffle which is located on an inner side and/or an outer side of the at least one layer of the first baffle;
the at least one layer of the first baffle is provided with a plurality of first guide slots, and the second baffle is provided with a plurality of second guide slots;
the impeller structure and the housing structure are configured to allow a fluid to enter from an inlet at an upper portion of the body, flow along the surface of the body, and flow out through an outlet at the lower portion of the body and through the first guide slots and the second guide slots;
a centerline of each first guide slot is deflected towards a direction opposite to a rotation direction of the impeller structure, and a centerline of each second guide slot is deflected towards the rotation direction of the impeller structure; and
the housing structure comprises two layers of the second baffle, wherein a first layer of the second baffle is located on the inner side of the at least one layer of the first baffle and a second layer of the second baffle is located on the outer side of the at least one layer of the first baffle, and wherein the two layers of the second baffle are nested and buckled to surround the at least one layer of the first baffle.
2. The impeller assembly according to claim 1 , wherein a size of the body increases progressively from the upper portion of the body to the lower portion of the body, and the surface of the body is a curved surface.
3. The impeller assembly according to claim 1 , wherein a blade angle of each backward-skewed blade on any flow plane first decreases progressively and then increases progressively from the inlet to the outlet, the blade angle being an included angle between a tangent line of a surface arc line of the backward-skewed blade and an axial plane of the impeller structure.
4. The impeller assembly according to claim 3 , wherein a magnitude of the blade angle at the inlet is 20-80°, and the magnitude of the blade angle at the outlet is 0-30°.
5. The impeller assembly according to claim 1 , wherein an included angle between the centerline of each first guide slot and a radial direction of a central axis of the body is 15-50°.
6. The impeller assembly according to claim 1 , wherein an included angle between the centerline of each second guide slot and a radial direction of a central axis of the body is 35-80°.
7. A mixing apparatus, comprising the impeller assembly of claim 1 .