JPH10141296A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a regulating function of a blower characteristic by constituting wind blocking means so as to fix a position in an impeller rotary shaft core direction of a wind blocking object part, in a condition in which a width of the wind blocking object part is held to a fixing width in an impeller width. SOLUTION: A wind blocking annular member 11 fitted in an impeller 4, is functioned as wind blocking means S for regulating blower characteristic for blocking wind circulated from an impeller inner part outward the impeller 4 in a partial range of a rotary shaft core P direction in the impeller 4. In the case where the annular member 11 is mounted, a width of the annular member 11 is fixed, and thereby, the width of a wind block object part (x) is fixed. It is fixed whether the annular member 11 is connected and supported or not to a stay 12 on every positions in the width of the impeller 4 so as to fix the position of the wind blocking object part (x) in the rotary shaft core P direction in a condition in which the wind blocking object part (x) is held to a fixing width. It is thus possible to regulate an integrated blower characteristic to be desired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower for use in various applications including air conditioning equipment, and more particularly, to a blower that blocks air from inside the impeller to the outside of the impeller in a partial range of the impeller in the direction of the rotation axis. The present invention relates to a blower that is provided with a windshield for adjusting characteristics and thereby adjusts blower characteristics such as air volume and pressure of the blower to desired ones.

[0002]

2. Description of the Related Art Conventionally, as a blower of this type, as shown in Japanese Utility Model Application Laid-Open No. 58-10900, the inside of an impeller is provided between an intake port side and an impeller main plate side as wind shielding means. A disk-shaped member is provided for partitioning, and the disk-shaped member prevents gas from flowing inward from the inner side of the impeller (that is, the side of the impeller main plate). There is a type in which a portion between the impellers is set as a windshield target, and ventilation from the inside of the impeller to the outside of the impeller in this portion is blocked.

As disclosed in Japanese Utility Model Application Laid-Open No. 62-95199, a cylindrical member is inserted into the impeller through a suction port as a wind-shielding means. With the portion between the formed impeller side plate and the insertion end of the cylindrical member as a windshield target portion, a type in which ventilation from the inside of the impeller to the outside of the impeller in this portion is blocked by the insertion portion of the cylindrical member. is there.

Further, as seen in Japanese Utility Model Laid-Open No. 48-804 (see FIG. 12), a blade width adjusting ring R having a through hole for each blade 4c is provided as a wind shielding means.
Is attached to the impeller side plate 4b in a structure that allows the insertion depth to be adjusted to the side of the impeller main plate 4a, whereby the impeller of the impeller 4 is substantially similar to the cylindrical member. The portion between the side plate 4b and the insertion end of the blade width adjustment ring R is defined as a wind shielding target portion x, and ventilation from the inside of the impeller to the outside of the impeller at this portion is blocked by the insertion portion of the blade width adjustment ring R. There is a format.

[0005]

However, in the above-mentioned type using the disk-shaped member, the wind shielding target portion x is formed by the impeller main plate 4.
a is limited to the windshield form located on the side of a, and in the form using the cylindrical member and the blade width adjusting ring R, on the contrary,
Although the wind-shielding target portion x is limited to the wind-shielding mode in which the wind-shielding target portion x is located on the side of the impeller side plate 4b, as a result of various experiments, the general air-blowing characteristics including the air volume and pressure of the blower, the shaft power and noise, etc. Not only does the width change depending on the selection of the width of the wind shielding target portion x, but also the position of the wind shielding target portion x in the direction of the impeller rotation axis P causes a difference in the airflow form in the blower casing. It was found that the characteristics of the blower changed.

In this regard, in each of the conventional types, the position of the disk-shaped member in the direction of the axis of the impeller rotation axis or the insertion depth of the cylindrical member or the blade width adjusting ring R is set, so that the shielding within the impeller width is performed. Although the width of the wind target portion x can be arbitrarily selected, the position of the wind shield target portion x in the direction of the impeller rotation axis is limited to the side of the impeller main plate 4a and the side of the impeller side plate 4b as described above. However, the function of adjusting the blower characteristics was still limited.

[0007] In view of the above circumstances, a main object of the present invention is to provide a blower characteristic adjustment type in which ventilation from the inside of the impeller to the outside of the impeller is blocked by a windbreak means in a partial range in the direction of the axis of rotation of the impeller. Another advantage is that the function of adjusting the characteristics of the blower can be further enhanced.

[0008]

[Means for Solving the Problems]

[1] In the invention as set forth in claim 1, the windshield means is provided in a state where the width of the windshield target portion is kept at the selected width within the impeller width.
Since the configuration is such that the position of the target windshield in the direction of the impeller rotation axis can be selected, in addition to adjusting the blower characteristics by selecting the width of the target windshield, a form independent of this width selection Therefore, it is possible to adjust the characteristics of the blower by selecting the position of the windshield target portion in the direction of the axis of the impeller rotation axis, and therefore, the function of adjusting the blower characteristics is higher than that of each conventional type as described above. Obtainable.

[2] According to the second aspect of the present invention, as the wind-shielding means, an annular member for wind-shielding is arranged inside or outside of the impeller, so that the inside of the impeller width is reduced. The portion where the wind-shielding annular member exists is a wind-shielding target portion, and ventilation from the inside of the impeller to the outside of the impeller at this portion is blocked by the presence of the wind-shielding annular member. Therefore,
According to this configuration, the blower characteristics are adjusted by selecting the width of the wind-shielding annular member and selecting the disposition position of the wind-shielding annular member in the direction of the impeller rotation axis. The invention described in 1 can be easily realized.

[3] According to the third aspect of the invention, since the wind-shielding means is configured to be capable of freely changing the position of the wind-shielding target portion in the direction of the impeller rotation axis, for example, the wind-shielding target portion is provided with a blade. 3. In response to a request for adjusting or changing the characteristics of the blower, as compared with implementing the invention according to claim 1 or 2 in a form in which the subsequent position change operation is fixed at a selected position in the vehicle rotation axis center direction. High quality can be obtained.

[4] In the invention according to claim 4, as the wind shielding means, a wind shielding annular member arranged inside the impeller is provided. By supporting the position change operation in the impeller rotation axis center direction on the rotation shaft of the impeller in a free state, the position change operation of the wind-shielding annular member allows the wind-shielding target portion in the impeller rotation axis center direction. Enable to change the position. In other words, according to this configuration, the impeller rotating shaft can be used as a guide for changing the position of the wind-shielding annular member, thereby simplifying the position-changing structure of the wind-shielding annular member and changing its position. Operation can be facilitated.

[5] According to the fifth aspect of the invention, since the wind-shielding means is configured to be capable of changing the width of the wind-shielding target portion, for example, the width-changing operation after the selection of the width of the wind-shielding target portion is performed. As compared with the case where the invention according to claims 1 to 4 is not implemented in an impossible form, it is possible to obtain a higher degree of responsiveness to a request for adjustment / change of the blower characteristics.

[6] In the invention according to claim 6, as the wind-shielding means, a wind-shielding annular member arranged inside or outside of the impeller is provided. The width of the portion to be wind-shielded can be changed by expanding and contracting the wind-shielding annular member by making the structure in which a plurality of annular components are fitted to be relatively movable in the direction of the impeller rotation axis. To do. In other words, according to this configuration, since the annular component of the wind-shielding annular member can be formed of a rigid material, for example, the wind-shielding annular member is formed of an elastic material, and the elasticity allows the width of the wind-shielding annular member to be increased. Compared to making changes possible,
Higher device strength can be obtained.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] FIGS. 1 and 2 show a multi-blade blower,
Is the casing back plate 1a and the casing side plates 1 on both sides thereof.
Spiral casing formed by b and 1c, 2 is a suction port, 3 is a discharge port.

Reference numeral 4 denotes an impeller main plate 4a and an impeller side plate 4b.
And a plurality of blades 4c arranged in the circumferential direction between the plate members 4a and 4b in a circumferential direction. The impeller 4 is attached to the rotating shaft 5 (so-called main shaft) by an impeller boss 6.
It is housed in the casing 1 in a state of being connected and supported concentrically.

Reference numeral 7 denotes an impeller 4
, A bearing for supporting the rotating shaft 5, and 9 a blower driving motor connected to the rotating shaft 5 via a coupling 10.

Reference numeral 11 denotes a wind-shielding annular member which is fitted inside the impeller 4 so that the wind-shielding annular member 11 allows ventilation from the inside of the impeller to the outside of the impeller as the impeller 4 rotates. Functioning as a blower means S for adjusting the blower characteristics for preventing a partial range of the impeller 4 in the direction of the rotation axis P,
Specifically, in the impeller width, a portion where the wind-shielding annular member 11 is present is defined as a wind-shielding target portion x (that is, a portion corresponding to the above partial range), and the inside of the impeller at this portion x is set. To the outside of the impeller
Block by the presence of

Reference numeral 12 denotes a stay which is bridged between the impeller main plate 4a and the impeller side plate 4b at a plurality of circumferential positions inside the impeller. This is a mounting structure that is connected and supported to the stay 12 by the fastener 13 in an inner fitting state in contact with the edge.

In other words, when the wind-shielding annular member 11 is mounted, the width of the wind-shielding target portion x is determined by selecting the width of the wind-shielding annular member 11. By selecting which position in the vehicle width to connect and support to the stay 12, the windshield target portion x in the direction of the impeller rotation axis P while maintaining the width of the windshield target portion x at the selected width described above. The position is selected, and the overall blower characteristics including the air volume and the pressure, the shaft power and the noise are adjusted to the desired ones by the width selection and the position selection.

Further, even after the wind-shielding annular member 11 is mounted, the stay gripping by the fastener 13 is temporarily loosened or once released, and the wind-shielding annular member 1 within the impeller width is temporarily released.
The position of the windshield target portion x in the direction of the impeller rotation axis P can be changed by, for example, changing the support position of the fan 1 and the blower characteristics can be readjusted as required by this position change operation. It is like that.

It should be noted that the wind-shielding annular member 11 is structured so as to be divided into a plurality of pieces in the circumferential direction so that it can be inserted into and taken out of the suction port 2, so that the wind-shielding annular member 11 can be assembled after the blower is assembled. The member 11 is replaced with a member having a different width specification so that the characteristics of the blower can be readjusted by changing the width of the portion x to be shielded.

[Second Embodiment] FIGS. 3 and 4 show an example in which the support structure of the wind-blocking annular member 11 arranged inside the impeller 4 is changed, and the rotating shaft of the impeller 4 is shown. 5 through a boss 20 slidably fitted in the axial direction of the shaft 5 and a plurality of spokes 21 radially connected from the boss 20 to the impeller. The windshield annular member 11 is fixed by being supported on the rotating shaft 5 so as to be movable in the direction of the rotating shaft center P, and by fixing the boss portion 20 to the rotating shaft 5 with a fixing bolt 22 in the boss portion 20. .

That is, once the fixing bolts 22 are loosened, the wind-shielding annular member 11 can be moved in the direction of the impeller rotation axis P while the rotation shaft 5 is used as a guide. An operation for changing the position of the wind shielding target portion x in the axis P direction can be performed.

[Third Embodiment] FIGS. 5 and 6 show an example in which a wind-shielding annular member 30 which is arranged outside the impeller 4 is provided as a wind-shielding means S for adjusting the characteristics of the blower. In the width of the impeller, the portion where the outer fitted annular member for wind shielding 30 is present is defined as a wind shielding target portion x, and the ventilation from the inside of the impeller to the outside of the impeller at this portion x is defined as Member 3
Blocked by the presence of 0.

Numeral 31 denotes a stay extending between the outer edge of the impeller main plate 4a and the outer edge of the impeller side plate 4b at a plurality of positions in the circumferential direction outside the impeller, similar to the first embodiment. The above-mentioned annular member for wind shielding 30 is attached to the outer edge of each blade 4c in an externally fitted state by a fastener 32 by a fastener 32.
1, and the stay holding by the fastener 32 is loosened once or released once to change the support position of the wind-shielding annular member 30 within the width of the impeller. An operation for changing the position of the windshield target portion x in the core P direction can be performed.

[Fourth Embodiment] FIGS. 7 and 8 show that the operation of changing the position of the wind-blocking annular member 11 to be fitted inside the impeller 4 can be performed at any time from the outside of the casing by an operating mechanism. The boss portion 40 is fitted to the rotary shaft 5 of the impeller 4 so as to be slidable in the axial direction and relatively rotatable, and is radially connected to the boss portion 40. Through the plurality of spokes 41, the wind-shielding annular member 11 is movable in the direction of the impeller rotation axis P, and
The rotary shaft 5 and the impeller 4 are rotatably supported relative to each other.

As the operating mechanism, a ball screw type female screw 44 is attached to a screw shaft 43 supported on the casing 1 via a bearing 42, and the female screw 44 and the boss 40 are connected. Casing 1
The rotation of the handle 45 provided outside the screw shaft 4
A chain transmission mechanism 46 for rotating the shaft 3 is provided, and by rotating the screw shaft 43 by the handle 45, the wind-shielding annular member 11 is moved together with the female threading tool 44 in the direction of the impeller rotation axis P to thereby provide the impeller. An operation of changing the position of the wind shielding target portion x in the direction of the rotation axis P can be performed.

[Fifth Embodiment] FIGS. 9 and 10 show that the operation of changing the position of the wind-blocking annular member 30 arranged externally to the impeller 4 can be performed at any time from the outside of the casing by an operating mechanism. The above-described annular member 30 for wind shielding is attached to a stay 50 that is bridged between casing side plates 1b and 1c at a plurality of circumferential positions outside the impeller 4 in the direction of the impeller rotation axis P. It is movably supported by.

As the operating mechanism, a screw shaft 52 supported on the casing side plates 1b and 1c via a bearing 51 is provided.
Are provided at a plurality of locations in the circumferential direction of the impeller, a ball screw type female screw 53 is attached to these screw shafts 52, the female screw 53 and the wind-shielding annular member 30 are connected, and provided outside the casing 1. A chain transmission mechanism 55 for interlocking rotation of the plurality of screw shafts 52 by the rotation operation of the handle 54 is provided. By moving the annular member 30 together with the female screw 53 in the direction of the impeller rotation axis P, the position of the wind shielding target portion x in the direction of the impeller rotation axis P can be changed.

[Sixth Embodiment] FIG. 11 is a cross-sectional view of the wind-shielding annular member 1 arranged inside or outside of the impeller 4.
An example in which the widths of the windshield members 1 and 30 can be changed is shown, and the two annular constituent members 60a and 60b are relatively movable in the direction of the impeller rotation axis P with respect to the windshield annular member 11 (or 30). It has a flexible structure with a fitting structure.

Then, one annular component 60a is provided with the impeller rotation axis P direction (that is, the wind-shielding annular member 11 (3
(0) in the width direction), and the two annular component members 6 are inserted in a state of being inserted through the elongated holes 61.
A screw 62 for connecting and fixing the two annular components 60a is provided in an arbitrary width state between the most shortened state shown by a solid line and the most extended state shown by a chain line in FIG. , 60b can be connected and fixed by screws 62. With this adjustment, the wind-shielding annular member 11
By changing the width of (30), the width of the wind shielding target portion x in the impeller 4 is changed.

[Another Embodiment] Next, another embodiment of the present invention will be listed. In the embodiment of the present invention, the wind-shielding means S is not limited to the wind-shielding annular members 11 and 30 as shown in each of the above-described embodiments.
The specific shape and structure of can be variously changed.

When the wind-shielding means S is configured to be capable of freely changing the position of the wind-shielding target portion x in the direction of the impeller rotation axis P, the specific operation structure is the structure shown in each of the above-described embodiments. The invention is not limited to this, and various configurations can be changed, and the wind shielding target portion x is fixed at a selected position in the direction of the impeller rotation axis P in a state where subsequent position changing operation is impossible. Alternatively, the invention described in 2 may be implemented.

When the wind-shielding means S is configured such that the width change operation of the wind-shielding target portion x can be freely performed, the wind-shielding annular members 11 and 30 are elastically replaced with the telescopic structure as shown in the sixth embodiment. Formed of a material, and the elasticity of the wind-shielding annular members 11, 3
A configuration that allows the width to be changed to zero may be adopted, and various specific configuration changes can be made to the specific width changing structure.

Further, as shown in the sixth embodiment, the annular members 11 and 30 for wind shielding are formed by a plurality of annular components 60a and 60a.
In the case where the width of the wind shielding target portion x can be changed by making the expansion / contraction structure that can be relatively movably fitted in the direction of the impeller rotation shaft center P by changing the width of the annular components 60a and 60b, the width is changed. The range may be increased.

In each of the embodiments described above, a multi-blade blower is illustrated. However, the present invention is not limited to a multi-blade blower, but can be applied to a rearward blower, a blade-type blower, and the like. Further, the application of the blower is not limited to the air-conditioning application, but may be any application. Further, the gas handled by the blower is not limited to air, but may be any gas.

Incidentally, reference numerals are written in the section "Claims" for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a front view structural view of a blower showing a first embodiment.

FIG. 2 is a side view structural view of the blower showing the first embodiment.

FIG. 3 is a front view structural view of a blower showing a second embodiment.

FIG. 4 is a side view structural view of a blower showing a second embodiment.

FIG. 5 is a front view structural view of a blower showing a third embodiment.

FIG. 6 is a side view structural view of a blower showing a third embodiment.

FIG. 7 is a front view structural view of a blower showing a fourth embodiment.

FIG. 8 is a side view structural view of a blower showing a fourth embodiment.

FIG. 9 is a front view structural view of a blower showing a fifth embodiment.

FIG. 10 is a side view structural view of a blower showing a fifth embodiment.

FIG. 11 is a structural diagram of a wind-shielding annular member showing a sixth embodiment, and an enlarged view of a main part.

FIG. 12 is a structural view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 4 impeller P impeller rotation axis core S wind shielding means x wind shielding target portion 11, 30 wind shielding annular member 5 impeller rotation shaft 60a, 60b annular component

Claims (6)

[Claims] 1. A blower provided with a windshield means (S) for adjusting blower characteristics that blocks ventilation from the inside of the impeller to the outside of the impeller in a partial range of the impeller (4) in the direction of the axis of rotation (P). The windshield means (S) is arranged such that the width of the windshield target portion (x) within the impeller width is kept at the selected width, and the impeller rotation axis of the windshield target portion (x) is maintained. An air blower having a configuration capable of selecting a position in the (P) direction. 2. The wind-shielding means (S) includes an annular member (11, 30) for wind-shielding, which is disposed inside or outside of the impeller (4). Blower. 3. The wind-shielding means (S) according to claim 1 or 2, wherein the wind-shielding means (S) is configured to be capable of freely changing the position of the wind-shielding target portion (x) in the direction of the impeller rotation axis (P). Blower. 4. An annular member (1) for wind shielding, which is disposed inside the impeller (4) as the wind shielding means (S).
1) is provided, and the wind-shielding annular member (11) is attached to the impeller rotating shaft center (P).
The impeller (4) in a state where the position change operation in the direction is free.
4. The blower according to claim 3, wherein the blower is supported on a rotating shaft (5). 5. The wind shielding means (S) is configured to be capable of freely changing the width of the wind shielding target portion (x).
The blower according to any one of claims 4 to 4. 6. A wind-shielding annular member (11, 30) which is disposed inside or outside of the impeller (4) as the wind-shielding means (S). 6. An annular member (11, 30) having a structure in which a plurality of annular components (60a, 60b) are telescopically structured so as to be relatively movably fitted in a direction of an impeller rotation axis (P). Blower.