CN102734224B - Synchronous regulating device with inlet guide blades for high-speed centrifugal fan - Google Patents

Abstract

The invention relates to a synchronous adjustment device for the inlet guide vanes of a high-speed centrifugal fan, comprising guide vanes, rotating arms, pin shafts, spheres, rollers, rotating rings, and driving arms; The first rotating pair is formed in the uniformly distributed shaft holes; one end of each rotating arm is fixedly connected with the journal of each guide vane through a key, and the other end of each rotating arm has a U-shaped groove and each ball Connected to form a spherical kinematic pair; each of the spheres is respectively fixed in the shaft holes uniformly distributed on the circumference of the rotating circle through a pin shaft; A second rotating pair is formed; the inner diameter of the rotating ring is respectively tangent to each roller to form a third rotating pair; the driving arm is fixedly connected to the rotating ring through bolts. The invention has simple, compact and reasonable structure, low manufacturing cost, and is suitable for use on high-speed centrifugal fans of all specifications.

Description

A synchronous adjustment device for the inlet guide vane of a high-speed centrifugal fan

technical field

The invention relates to a synchronous adjusting device, in particular to a mechanical device for synchronously adjusting the angle of an inlet guide vane on a high-speed centrifugal fan, belonging to the technical field of mechanical structures.

Background technique

In the prior art, the high-speed centrifugal fan can maintain a high efficiency operation when the flow rate is changed by adjusting the inlet guide vane. The adjustment of the guide vane is generally realized by gears, sprocket drives and other devices, and the structure is complex and the manufacturing cost is high. high.

Contents of the invention

The object of the present invention is to overcome the above disadvantages, thereby providing a synchronous adjustment device for the inlet guide vane of a high-speed centrifugal fan, which has a simple structure and low manufacturing cost.

According to the technical solution provided by the present invention, a synchronous adjustment device for the inlet guide vane of a high-speed centrifugal fan includes 9-21 guide vanes and an inner volute, and is characterized in that it also includes a rotating arm, a key, a pin shaft, a sphere, a roller, a rotating Ring, driving arm; each guide vane journal in the 9-21 guide vanes is respectively installed in the shaft holes uniformly distributed on the circumference of the upper part of the inner volute with a diameter of D1 to form a first rotating pair; each rotating One end of the arm is fixedly connected with the journal of each guide vane through a key, and the other end of each arm has a U-shaped groove connected with each sphere to form a spherical kinematic pair; each sphere is respectively fixed on the In the uniformly distributed shaft holes on the circumference of the rotating circle with an inner diameter of D2; the journals of the three rollers are respectively installed in the uniformly distributed shaft holes with a central circle diameter of D3 in the lower part of the inner volute and form a second rotating pair; The inner diameter of the rotating ring is respectively tangent to each roller and forms a third rotating pair; the driving arm is fixedly connected to the rotating ring through bolts.

As a further improvement of the present invention, the centers of the upper diameter D1 of the inner volute, the inner diameter D2 of the rotating circle, and the central circle diameter D3 of the lower part of the inner volute are on the same axis.

As a further improvement of the present invention, the diameter D1 of the upper part of the inner volute is not less than 100mm, the inner diameter D2 of the rotating circle is not less than 190mm, and the diameter D3 of the center circle of the lower part of the inner volute is not less than 150mm

As a further improvement of the present invention, the diameter D1 of the upper part of the inner volute < the diameter D3 of the center circle of the lower part of the inner volute < the inner diameter D2 of the rotating ring.

Compared with the prior art, the utility model has the following advantages:

The invention has simple, compact and reasonable structure, low manufacturing cost, and is suitable for use on high-speed centrifugal fans of all specifications; it can realize synchronous adjustment of all guide vanes, and is beneficial to ensure synchronous adjustment accuracy.

Description of drawings

Fig. 1 is a schematic diagram of the structure principle of the present invention.

Fig. 2 is a sectional view along line I-I of Fig. 1 .

Fig. 3 is a K-direction view of Fig. 2 .

Detailed ways

Below the present invention will be further described in conjunction with accompanying drawing:

As shown in Fig. 1 and Fig. 2: the present invention includes a guide vane 1, a rotating arm 2, a key 3, a pin shaft 4, a sphere 5, a roller 6, a rotating ring 7, a driving arm 8, and the like.

The synchronous adjustment device of the inlet guide vane of high-speed centrifugal fan includes 9-21 guide vanes 1, rotating arm 2, key 3, pin shaft 4, sphere 5, roller 6, rotating ring 7, driving arm 8; 9-21 guide vanes Each guide vane journal in 1 is respectively installed in the shaft holes evenly distributed on the circumference of the upper part of the inner volute with a diameter of D1 to form a first rotating pair; one end of each rotating arm 2 is connected to each guide vane through a key 3 1 is fixedly connected to the journal, and the other end of each pivot arm 2 is provided with a U-shaped groove to connect with each sphere 5 to form a spherical kinematic pair; the number of the spheres 5 is equal to that of the guide vanes. Each of the spheres 5 is respectively fixed in the shaft holes uniformly distributed on the circumference of the rotating ring 7 with an inner diameter of D2 through the pin shaft 4; The uniformly distributed shaft holes of D3 form the second rotating pair; the inner diameters of the rotating ring 7 are respectively tangent to each roller 6 and form the third rotating pair; the driving arm 8 is fixedly connected with the rotating ring 7 by bolts .

The upper diameter D1 of the inner volute, the inner diameter D2 of the rotating ring, and the center circle diameter D3 of the lower part of the inner volute are on the same axis, the upper diameter D1 of the inner volute is not less than 100mm, and the inner diameter D2 of the rotating ring is not less than 190mm. The diameter D3 of the center circle of the lower part of the volute is not less than 150 mm, and the diameter D1 of the upper part of the inner volute < the diameter D3 of the center circle of the lower part of the inner volute < the inner diameter D2 of the rotating circle.

Under the action of the driving force F, the driving arm 8 makes the rotating ring 7 rotate along the direction of the arrow A around the axis with a central diameter of D3, and each sphere 5 fixedly connected with it rotates correspondingly, and the sphere 5 drives the rotating arm 2 to rotate around the axis of the arrow A. The journal axis of the guide vane 1 rotates in the direction of arrow B, and the pivot arm 2 drives the guide vane 1 to rotate around its journal axis through the key 3, thereby realizing the synchronous adjustment of all the guide vanes, which is conducive to ensuring the accuracy of synchronous adjustment.

Claims (1)

1. a synchronizing controls for high-speed centrifugal fan entry guide vane, comprises 9-21 stator (1), inner spiral casing, also comprises pivoted arm (2), key (3), bearing pin (4), spheroid (5), roller (6), rotates circle (7), driving arm (8); Described each pivoted arm (2) one end is fixedly connected with the axle journal of each stator (1) respectively by key (3), and the other end of each pivoted arm (2) has U-type groove and is connected with each spheroid (5), forms spherical motion secondary; It is in the circumferentially uniform axis hole of the rotation circle (7) of D2 that described each spheroid (5) is separately fixed at internal diameter by bearing pin (4); Described driving arm (8) encloses (7) by bolt with rotation and is fixedly connected;

It is characterized in that: in a described 9-21 stator (1), each guide vane teunnion is installed on inner spiral casing upper diameter is respectively form the first revolute pair in the circumferentially uniform axis hole of D1; The axle journal of 3 described rollers (6) is installed on inner spiral casing lower central circular diameter to be respectively in the uniform axis hole of D3 and to form the second revolute pair; The described internal diameter rotating circle (7) is tangent with each roller (6) respectively and form the 3rd revolute pair;

The center of circle of described inner spiral casing upper diameter D1, rotation circle internal diameter D2, inner spiral casing lower central circular diameter D3 on the same axis;

Described inner spiral casing upper diameter D1 is not less than 100mm, and rotate circle internal diameter D2 and be not less than 190mm, inner spiral casing lower central circular diameter D3 is not less than 150mm;

Described inner spiral casing upper diameter D1< inner spiral casing lower central circular diameter D3< rotates circle internal diameter D2.