CN104847704B - A kind of instant machinery adjusting stator established angle - Google Patents

Abstract

The invention relates to a mechanical device for instantly adjusting the installation angle of guide vanes. The purpose is that the provided device should be able to exert the best performance immediately under different working conditions, and has the characteristics of labor-saving and convenient adjustment. The technical solution is: a mechanical device for instantly adjusting the installation angle of the guide vane, including a guide vane hub located upstream of the casing and coaxial with the casing and arranged in the fan casing, uniformly distributed around the circumference on the outer circumferential surface of the guide vane hub A plurality of guide vane blades; it is characterized in that the plurality of guide vane blades are rotatably hinged on the outer circumferential surface of the guide vane hub, and another adjustment mechanism drives and controls the rotation angle of the guide vane blades; the adjustment mechanism includes A prism adjustment shaft that can move along the axis of the fan casing and has the same number of side edges as the number of guide vane blades, a groove block matching structure that converts the movement of the prism adjustment shaft into rotation of the guide vane blades around the hinge axis, and applies a shaft to the prism adjustment shaft To the adjustment motor of thrust.

Description

A Mechanical Device for Immediately Adjusting the Installing Angle of Guide Vanes

technical field

The invention belongs to the technical field of fluid control, in particular to a mechanical device for instantly adjusting the installation angle of guide vanes.

Background technique

Rotating machinery is widely used in sectors such as electric power, petrochemical, metallurgy and aerospace. Taking the axial flow fan as an example, for fans with small hubs or low power, one impeller is often used instead of guide vanes. This scheme is widely used because of its simple structure and convenient manufacture. In some occasions with higher requirements, it is also necessary to install guide vanes on the axial flow fan to improve the overall performance of the fan. Among them, the front guide vane causes the airflow to produce negative pre-swirl before entering the impeller, which can change the air volume, wind pressure, and improve the adjustment efficiency of the fan; the rear guide vane rotates the direction of the airflow flowing out of the impeller back to the axial direction, and at the same time converts the kinetic energy of the deflected airflow into Static pressure can significantly improve the static pressure efficiency and improve the operation performance of the fan.

In practical applications, the guide vane is usually welded to the hub before installation, and its installation angle is determined by the optimal installation angle of the rotating machine when it operates under standard conditions. However, rotating machines often need to work under different working conditions, which makes the fixed guide vane installation angle may not be the optimal value. If you want to change the installation angle of the guide vane, it is usually necessary to stop the machine and replace the guide vane with a matching installation angle. This is not only time-consuming and labor-intensive, but also a kind of wear and tear on the machine itself.

Therefore, there is an urgent need to design a mechanical device that can instantly adjust the installation angle of the guide vane, so as to achieve the purpose of achieving the best efficiency of the rotating machine immediately under different working conditions.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a mechanical device for instantly adjusting the installation angle of the guide vane. The device should be able to immediately exert the best performance under different working conditions, and has the characteristics of labor-saving and convenient adjustment.

The technical solution provided by the present invention is: a mechanical device for instantly adjusting the installation angle of the guide vane, which includes a guide vane hub located upstream of the casing and coaxially arranged in the fan casing with the casing, and uniformly distributed around the circumference of the guide vane. A plurality of guide vane blades on the outer peripheral surface of the hub; it is characterized in that the plurality of guide vane blades are respectively rotatably hinged on the outer peripheral surface of the guide vane hub, and another adjustment mechanism drives and controls the rotation angle of the guide vane blades;

The adjustment mechanism includes a prism adjustment shaft that can move along the axis of the fan casing and has the same number of side edges as the number of guide vane blades, a groove block matching structure that converts the movement of the prism adjustment shaft into rotation of the guide vane blades around the hinge axis, and Prismatic adjustment shaft An adjustment motor that applies axial thrust.

The prism adjustment shaft is positioned in the inner cavity of the guide vane hub through a translation structure; the translation structure includes several sliding struts arranged in the inner cavity of the guide vane hub and parallel to the axis of the fan casing, and set on the right end of the prism adjustment shaft and connected with The sliding holes are matched one by one of the sliding struts.

In the matching structure of the groove block: the guide vane hinge shaft connected with the guide vane blade passes through the guide vane hub and extends into the inner cavity of the guide vane hub and is fixed with a sliding sleeve, and the sliding rod slidingly matched with the sliding sleeve is also A sliding block is hinged; each side of the prism adjusting shaft is formed with a straight sliding slot which is oblique to the length direction of the side edge and is slidably fitted with the sliding block.

The adjusting motor applies an axial thrust to the prism adjusting shaft through a screw mechanism; the screw mechanism includes a screw hole made on the left end of the prism adjusting shaft and a screw fixed on the output shaft of the adjusting motor and matched with the screw hole.

The right end face of the inner cavity of the guide vane hub is also fixed with a prism sleeve with the same number of ribs on one side as the number of guide vane blades; the right end face of the prism sleeve is made with several perforations that facilitate the passage of sliding struts. A long chute perpendicular to the length direction of the side edge is also made respectively, and the slide block is inserted into the straight chute after passing through the long chute.

The axis of the guide vane hinge shaft is perpendicular to and intersects with the axis of the fan casing.

The guide vane hinge axis axes of the several guide vane blades are all located on the same plane perpendicular to the axis of the fan casing.

The guide vane hub is fixed in the fan casing through the guide vane bracket.

Working principle of the present invention is as follows (referring to Fig. 1):

Turn on the power, and the impeller 9 of the axial flow fan starts to rotate; control and adjust the motor 2 to rotate according to the change of the working condition, that is, drive the screw 10 fixed on the output shaft, and the screw 10 and the inner part of the air inlet end (left end) of the prism adjustment shaft 11 The threaded holes are engaged, so that the prism adjustment shaft 11 slides axially on the four sliding rods 17; Constrained by the groove, slide along the straight chute and the long chute at the same time; as a result, the sliding rod is driven to slide and fit with the sliding sleeve, and at the same time drive the sliding sleeve to swing around the axis of the hinge shaft of the guide vane, and start to align with the sliding sleeve. The installation angle of the guide vane blade 5 is adjusted. When the highest efficiency of the axial flow fan under this working condition is reached, the motor 2 is controlled and adjusted to stop rotating, thereby realizing the purpose of instantly adjusting the installation angle of the guide vane.

The beneficial effects of the present invention are:

Since the installation angle of the guide vane can be adjusted as required, the air volume and air pressure can be changed, and the static pressure efficiency of the fan can be improved, so that it can play the best performance immediately under different working conditions, thus significantly improving the operation and use performance of the fan. The work efficiency of the blower fan is improved; moreover, the adjustment motor only needs to be activated during adjustment, which not only saves labor and is convenient for adjustment, but also ensures adjustment accuracy, which meets the needs of users.

Description of drawings

Fig. 1 is a schematic diagram of the installation position of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of the present invention (a view after part of the guide vane hub and part of the prismatic sleeve are removed).

Fig. 3 is a schematic diagram of the connection relationship between the sliding strut and the prismatic sleeve and the guide vane hub in the present invention (removing the adjustment motor, the guide vane blade and the prism adjustment shaft) and the schematic diagram of the three-dimensional structure (removing part of the guide vane hub and part of the prism sleeve rear view).

Fig. 4 is one of the three-dimensional structural schematic diagrams of the prism adjusting shaft of the present invention.

Fig. 5 is the second schematic view of the three-dimensional structure of the prism adjusting shaft of the present invention.

Fig. 6 is a schematic perspective view of the three-dimensional structure of the prism sleeve of the present invention.

Fig. 7 is a perspective view of the structure of guide vane adjustment according to the present invention.

detailed description

The present invention will be further described below in conjunction with the embodiment described in accompanying drawing (supporting with axial flow fan).

As shown in Figures 1-2, a mechanical device for instantly adjusting the installation angle of the guide vane includes a fan casing 1, an adjusting motor 2, a guide vane hub 3, a guide vane bracket 4, guide vane blades 5, a rotor motor 6, Case 7, case bracket 8, impeller 9, screw rod 10, prism adjustment shaft 11, guide vane hinge shaft 12, pin shaft 13, sliding rod 14, slider 15, sliding sleeve 16, sliding strut 17 and prismatic sleeve 18.

In the figure: the casing 7 is fixed on the downstream of the guide vane hub 3 (the air outlet end) inside the fan casing 1 through the casing bracket 8 to ensure that the impeller 9 is coaxial with the flow channel of the fan; the rotor motor 6 is installed in the casing 7; The output shaft of the rotor motor 6 is connected with the hub of the impeller 9 to control the rotation of the impeller 9; the guide vane hub 3 equipped with the guide vane blade 5 is installed on the upstream (air intake end) of the impeller. The above is the conventional structure of the axial flow fan.

The improvement of the present invention is: the plurality of guide vane blades are respectively rotatably positioned on the outer peripheral surface of the guide vane hub, and are driven by an adjustment mechanism to control the rotation angle of the guide vane blades.

The adjustment mechanism includes a prism adjustment shaft 11 that can move along the axis of the fan casing, a groove block matching structure that converts the movement of the prism adjustment shaft into the rotation of the guide vane around the hinge axis, and an adjustment mechanism that applies axial thrust to the prism adjustment shaft. Motor 2.

The guide vane hub 3 is fixed inside the fan casing 1 through the guide vane bracket 4 to ensure that the guide vane hub 3 is coaxial with the flow channel of the fan; the adjusting motor is fixed outside the air inlet end of the guide vane hub 3; the output shaft of the adjusting motor is connected to the screw 10 .

As shown in Figure 3, the prism adjustment shaft is positioned in the guide vane hub cavity through a translation structure; The right end of the prism adjustment shaft and the sliding hole 11-2 that cooperates with the sliding struts one by one. The right end of the sliding strut 17 is fixed on the inner end surface of the air outlet end of the guide vane hub 3, and is used as a slideway for the axial sliding of the prism adjustment shaft; thus selecting multiple sliding struts can reduce the load of each strut, and this embodiment chooses The four sliding struts are arranged in a square, and the axis of the guide vane hub 3 passes through the central point of the square.

As shown in Figures 3 and 4, the number of side edges of the prism adjustment shaft 11 is the same as the number of guide vane blades 5; Straight chute 11-1 with an oblique angle; the section of the chute is preferably "convex" shape, and the angle between the straight chute and the length direction of the side is determined by the range that needs to be controlled by the installation angle of the guide vane; the air inlet end of the prism adjustment shaft 11 (left end) has an internally threaded hole 11-3, which is engaged with the screw rod 10 (forming a screw mechanism); the air outlet end of the prism adjustment shaft 11 has 4 sliding holes 11-2, and the sliding struts 17 are respectively worn one-to-one. Through these slide holes, the prism adjusting shaft 11 can slide axially on the sliding strut.

As shown in Figure 6, the number of side edges of the prism sleeve 18 is the same as the number of guide vane blades 5; each side of the prism sleeve 18 is shaped on a long chute 18-1 perpendicular to the length direction of the side edges, right The side end surface is formed with bolt through holes and 4 perforations 18-2 matching the sliding struts; bolts, nuts and spring washers fix the end surface of the prismatic sleeve on the inner side of the end surface of the air outlet end (right end) of the guide vane hub 3, 4 The first sliding struts 17 pass through the four perforations on the end face in one-to-one correspondence to ensure that the corresponding sides of the prism sleeve and the prism adjustment shaft 11 are parallel and have consistent gaps.

As shown in Figure 7, in the matching structure of the groove block: the guide vane blade 5 is hinged on the outer circumferential surface of the guide vane hub, and the guide vane hinge shaft 12 radially passes through the guide vane hub and extends into the inner cavity of the guide vane hub and connects with a Sliding sleeve 16 is fixed; Slide bar 14 can be inserted in this sliding sleeve and carry out sliding fit, and its one end is also hinged (hinged axis and slide bar axis vertical) a slide block 15 by bearing pin 13; The lower end of described slide block 15 is a cube 15-1, correspondingly fit and slide with the straight chute 11-1 on the side of the prism adjustment shaft 11, and the cylindrical section 15-2 at the upper end of the slider 15 is also inserted into the long chute 18-1 on the side of the prism sleeve 18, So that the slider and the slider can slide in their respective slideways precisely and stably. The adjustment structure of each guide vane blade 5 should be completely consistent, so as to achieve the effect of synchronous adjustment.

The above description is an implementation case of the present invention, and does not limit the patent scope of the present invention. Therefore, all simple modifications and various similar changes to the present invention based on the technical essence of the present invention are included in the patent protection scope of the present invention.

Claims (7)

1. a kind of instant machinery adjusting stator established angle, arranges including positioned at casing (7) upstream and with casing coaxial line Stator wheel hub (3) in fan casing (1), circumferentially it is distributed on several stator blades (5) of stator wheel hub outer circumference surface； It is characterized in that several stator blades described are rotationally hinged on stator wheel hub outer circumference surface respectively, separately there is a regulation machine Structure drives and controls the rotational angle of stator blade；

Described governor motion includes one and can move along fan casing axis and incline quantity and stator blade quantity identical prism Adjustment axis (11), the movement of prism adjustment axis is converted to the geosynclinal block fit structure that stator blade rotates around hinge axes and right Prism adjustment axis apply the regulation motor (2) of axial thrust；

Described prism adjustment axis are positioned at stator hub inner lumen by a translation structure；This translation structure includes being arranged in guide vane wheel Hub inner chamber and several slip poles (17) parallel to fan casing axis and be opened in prism adjustment axis right-hand member and with institute State the slide opening (11-2) that slip pole coordinates one by one.

2. according to claim 1 instant adjust stator established angle machinery it is characterised in that：Described regulation motor Axial thrust is applied to prism adjustment axis by a screw mechanism；This screw mechanism includes being produced on the spiral shell of prism adjustment axis left end Hole (11-3) and the screw rod (10) being fixed on regulation motor output shaft and coordinating with screw.

3. according to claim 2 instant adjust stator established angle machinery it is characterised in that：Described geosynclinal block cooperation In structure：The stator jointed shaft (12) being connected as a single entity with stator blade is passed through stator wheel hub and stretches into after stator hub inner lumen with one Sliding sleeve (16) is fixing, the also hinged slide block (15) of the slide bar (14) being slidably matched with this sliding sleeve；Each of described prism adjustment axis Side is all formed with one with the length direction bevel of incline and the straight runner (11-1) slidably chimeric with described slide block.

4. according to claim 3 instant adjust stator established angle machinery it is characterised in that：Described stator wheel hub Its right end face of inner chamber also fixes an incline quantity and stator blade quantity identical prism sleeve (18)；The right-hand member of prism sleeve Face makes have several to be beneficial to perforation (18-2) that slip pole is passed through, each side also make respectively one with incline length direction Vertical long chute (18-1), described slide block embeds described straight runner after passing through described long chute again.

5. according to claim 4 instant adjust stator established angle machinery it is characterised in that：Described stator is hinged Axle axis is vertical and intersects at fan casing axis.

6. according to claim 5 instant adjust stator established angle machinery it is characterised in that：Described several are led The stator jointed shaft axis of leaf blade is respectively positioned on the same plane perpendicular to fan casing axis.

7. according to claim 6 instant adjust stator established angle machinery it is characterised in that：Described guide vane wheel Hub is fixed in fan casing by blade carrier (4).