TW201712232A - Fan machine - Google Patents

Abstract

The invention relates to a fan machine (1), comprising a fan wheel (7), a fan wheel shaft (4), and a machine housing (2), wherein the fan wheel shaft (4) is supported in the machine housing (2) by means of a fixed bearing (5) and a movable bearing (6), wherein furthermore the fan wheel shaft (4) has a shaft axis (x) and can be moved in relation to the machine housing (2) in two opposite axial directions for adjustment purposes and the fixed bearing (5) can be moved in relation to the machine housing (2) in order to adjust a gap (S) between the fan wheel (7) and the machine housing (2) overall. In order to further improve a fan machine of the type in question, in particular with regard to a gap adjustment possibility that is easy to handle, the shaft end (8) of the fan wheel shaft (4) associated with the fixed bearing (5), according to the invention, is accommodated in a bushing (16) surrounding a rolling-element bearing (14), which bushing can be slid in relation to the machine housing (2), and that the bushing (16) can be acted on by means of an adjustment screw (19) supported on the machine housing (2) in order to adjust an axial position of the shaft end (8) at least in one direction.

Description

Blower

The present invention relates to a blower having: a blower impeller, a blower impeller shaft, and a casing, wherein the blower impeller shaft is supported in the casing by a fixed bearing and a floating bearing, wherein further, the blower impeller shaft has a shaft body The axis is displaceable relative to the housing in two opposite axial directions for adjustment purposes, and the fixed bearing is generally displaceable relative to the housing to create a gap between the blower wheel and the housing.

Blower of the above type is known, for example, in the form of a radial blower.

In a machine, in particular a blower, the precise axial position of the shaft body (for example, the blower wheel shaft) relative to the casing plays a decisive role in the machine function. The tolerance chains from the various parts of the shaft and the housing are often larger than the positional tolerances and the position must be adjusted. In conventional systems, this is achieved through manual procedures during the installation process.

For example, in the case of a feeler gauge, sliding caliper or depth gauge, the actual value of the axial play of the two components (in the blower, especially the axial gap between the blower impeller and the casing) is measured. This value is compared to a predetermined nominal value and the difference is calculated. This difference helps to adjust the axial position of the blower wheel shaft relative to the casing, for example, by assembling a combination of adjustment washers, and preferably between the fixed bearing and the abutment surface of the housing.

Based on the prior art of the prior art, the technical object of the present invention is to further improve the blower of the aforementioned type, particularly in terms of ease of operation of the gap adjustment.

According to a first inventive concept, the solution of the present invention for achieving the above object is a blower, wherein a shaft end of a blower impeller shaft corresponding to a fixed bearing is housed in a sleeve surrounding a rolling bearing, and the sleeve is In order to move relative to the casing, and in order to adjust the axial position of the shaft end, the sleeve can be acted upon by at least one adjustment screw supported on the casing.

The shaft end of the blower impeller shaft corresponding to the fixed bearing is preferably housed in a sleeve such as a casing that normally surrounds the bearing by a bearing (for example, a rolling bearing or a ball bearing). The casing, bearing and blower impeller shafts can be displaced axially as a whole for adjustment purposes only to adjust the clearance between the blower impeller and the casing. Such displacement for the purpose of gap adjustment is achieved by the rotation of the adjusting screw which is supported on the casing and thus supported on a section which is fixed in the axial direction with respect to the impeller shaft or the casing. The adjustment screw is preferably accessible from the outside of the housing and is further preferably constructed to enable conventional engagement with the tightening tool.

The adjusting screw is preferably threadedly engaged with the threaded hole on the casing side. The adjustment screw is reciprocally displaced in the axial direction based on the rotation. In the case where the adjusting screw is directly or indirectly supported on the sleeve, the rotational displacement of the adjusting screw directly acts on the axial orientation of the blower wheel shaft.

In a structurally advantageous solution, the gap size adjustment operation between the blower wheel and the casing can be simplified thereby. This eliminates the need to embed an adjustment washer or the like to change the axial position of the blower wheel shaft.

Specifically, the gap size adjustment proposed by the foregoing solution can also be performed after the blower is installed, in particular, after the adjustment screw is further externally available from the outside (as appropriate, in the removal of the cover or the like) After) proceed.

Therefore, the adjustment of the gap size preferably begins with a basic position at which the blower wheel impinges on the facing faces of the casing such that the gap size is equal to zero. Starting from this position, the gap size adjustment is based on the rotation of the adjusting screw and the resulting axial displacement of the adjusting screw together with the blower wheel shaft and the bushing, along the direction separating the blower wheel from the casing. When the adjusting screw has a predetermined thread lead, the predetermined gap size between the blower impeller and the casing corresponds to a clear rotation angle of the adjusting screw, and therefore, the blower wheel and the machine are found by rotating the adjusting screw by a predetermined rotation angle. The size of the gap to be formed between the shells. There is no need to perform operations such as measuring, calculating the difference between the actual clearance and the nominal clearance, and properly combining the adjustment components to constitute a potential source of error. The operation of adjusting the gap size is significantly simplified.

Other features of the invention will be described hereinafter, also in the description of the drawings, and are often preferred in the subject matter of claim 1 or the features of other claims. These features may also be of significance in the individual features of claim 1 or other claims that are subordinate to them.

Therefore, according to the exemplary technical solution, the adjustment screw rotation 90 degrees may correspond to an axial displacement of the sleeve and the blower impeller shaft of 0.2 mm to 0.3 mm, further preferably 0.25 mm, and the axial displacement degree preferably corresponds to The size of the gap to be formed.

The blower impeller has a negative pressure side and an overpressure side, wherein when the blower is operated, there is a pressure higher than the negative pressure side on the overpressure side.

The fixed bearing is preferably disposed on the negative pressure side of the blower impeller shaft On the shaft end. Correspondingly, when the blower is in operation, the overpressure acts through the blower impeller shaft in the direction of the adjusting screw, whereby the axial orientation of the fixed bearing supported on the adjusting screw is clear, at least when the blower is in operation.

In another embodiment, the blower wheel shaft can be pretensioned by spring force in the other axial direction of the adjusting screw. The spring member causes the blower wheel shaft to be axially loaded in the direction of the adjusting screw, so that the axial orientation of the fixed bearing is clear even when the blower is not operating. Accordingly, when the gap width is adjusted accordingly, the blower wheel shaft is preferably axially displaced by adjusting the screw while overcoming the spring force of the spring member.

The spring member acts between the floating bearing of the blower wheel shaft and the casing. For example, a disc spring or a wave spring is used as the spring member.

The sleeve of the fixed bearing is preferably constructed as a cylindrical hollow body. The radially outer surface is designed to slidably engage axially with a section of the casing, the inner wall of which is constructed to receive the bearing of the receiving shaft end.

In a preferred embodiment, the floating bearing is also provided with a sleeve that holds the associated bearing. In a preferred embodiment, the sleeves of the fixed bearing and the floating bearing are of the same design.

The sleeve of the fixed bearing can be provided with a separate bottom part, and an adjusting screw for axially displaceing the axis of the blower impeller can act on the bottom part. The bottom member can be secured to the sleeve. The bottom part can also be present as a detachable part relative to the sleeve and can be connected to an adjusting screw. Furthermore, the bottom part can generally be present as a detachable part, preferably guided in a correspondingly matched axial recess on the casing. In the case where the bottom member is constructed as a detachable member, the detachable member is also clamped between the adjusting screw and the sleeve of the fixed bearing at least after the gap size is adjusted.

In order to lock the gap size formed, for example, the position of the adjusting screw can be fixed by bonding or spot welding. In addition, the adjusting screw can also be equipped with a self-locking thread, so that the reverse displacement of the adjusting screw can only be intentional.

For example, a screw having a metric fine thread such as M10×1 or M12×1 is used as the adjusting screw.

The invention will be explained in detail below with reference to the drawings showing only the embodiments.

1‧‧‧Blowers

2‧‧‧Chassis

3‧‧‧Spiral channel

4‧‧‧Blower impeller shaft

5‧‧‧Fixed bearings

6‧‧‧ Floating bearing

7‧‧‧Blower Impeller

8‧‧‧(Blower impeller shaft) shaft end

9‧‧‧ leaves

10‧‧‧ drive

11‧‧‧Inlet

12‧‧‧Exit

13‧‧‧(Blower impeller shaft) shaft end

14‧‧‧ rolling bearings

15‧‧‧Support washer

16‧‧‧ casing

17‧‧‧Axial recess

18‧‧‧ bottom part

19‧‧‧Adjustment screws

20‧‧‧Threaded holes

21‧‧‧Tool hole

22‧‧‧Spring parts

A‧‧‧ gap size

A‧‧‧ Negative pressure side

B‧‧‧Overvoltage side

S‧‧‧ gap

X‧‧‧axis axis

1 is a top view of a blower; FIG. 2 is a related front view; FIG. 3 is an enlarged cross-sectional view taken along line III-III of FIG. 2; and FIG. 4 is an enlarged view of the IV area of FIG. Figure 5 is an enlarged view of the V region of Figure 3, with respect to the region of the floating bearing; Figure 6 is an enlarged view of the VI region of Figure 3.

First, the blower 1 is shown and described in connection with FIG. 1 in the form of a radial blower.

The blower 1 has a casing 2, in particular in the region of the spiral channel 3, which can be composed of two parts.

The blower impeller shaft 4 having the shaft axis x is disposed transverse to the spiral passage 3. The ends of the blower impeller shaft 4 are respectively supported, one end being supported in the fixed bearing 5 and the other end being supported in the floating bearing 6.

The blower wheel 7 is fixed to the blower wheel shaft 4 in a rotationally fixed manner. The blower wheel 7 extends in the region of the formed spiral passage 3 and, in one of On the broad side, there are vanes 9 on its axial end 8 close to the fixed bearing 5.

An electric drive is provided between the blower impeller 7 and the floating bearing 6 to drive the blower impeller shaft 4 to rotate when the blower 1 is in operation. The blower impeller 7 is driven around the shaft axis x via the blower impeller shaft 4, wherein the air is sucked through the inflow port 11 on the fixed bearing side of the casing 2, and this portion of the air is matched with the spiral passage 3 of the blower wheel 7 Under the action, after being compressed, it is discharged through the outflow port 12.

Each of the shaft ends 8, 13 is first provided with a wraparound rolling bearing 14. The rolling bearing 14 is axially locked by a support washer 15, and the support washer 15 is placed on the end face of the shaft end and fixed by screws.

Each of the rolling bearings 14 is housed in a sleeve 16 which holds the bearing outer ring, in particular axially.

The sleeve 16 is substantially hollow cylindrical and oriented coaxially with the shaft axis x. The extent of the shaft end 8 or 13 extending inside the wall is at least half the length of the sleeve 16.

The sleeve 16 is designed to cooperate with the surrounding wall of the axial recess 17 on the casing 2 on the outside of the wall, and the axial recess 17 is matched to the outer diameter of the sleeve 16.

The axial recess 17 has an axial length that generally corresponds to the axial length of the sleeve 16.

The sleeve 16 corresponding to the fixed bearing 5 is further provided with a bottom member 18. The bottom member 18 is preferably a removable member in the form of a disk or the like oriented transverse to the axis x of the shaft. The bottom part 18 is in particular supported on the axially outward end face of the sleeve 16 on the side of the fixed bearing (see Fig. 4).

In the section formed by the casing 2 on the fixed bearing side, the adjusting screw 19 is screwed to the side of the bottom member 18 remote from the sleeve 16. To this end, the casing 2 has a phase Threaded hole 20 should be applied.

The adjustment screw 19 is preferably accessible from the outside and has a conventional tool hole 21 for operation.

The adjustment screw 19 is preferably formed with a flat surface oriented transverse to the axis x of the shaft body on the side opposite the tool hole 21 and adjacent to the bottom member 18 for planar engagement with the facing surface of the bottom member 18. This face of the adjusting screw 19 can also be bent, for example, in the direction of the bottom member 18.

The adjusting screw 19 is arranged coaxially with the shaft axis x.

For a floating bearing 6 located at the axially opposite end, the sleeve 16 and the further rolling bearing 14 can be axially displaced by the blower impeller shaft 4 in the axial recess 17 formed therein by the casing 2. Correspondingly, the axially outwardly facing end of the sleeve 16 is axially spaced from the end face of the housing.

Further in the region of the floating bearing 6, a spring member 22 in the form of a wraparound wave spring is provided. The spring member 22 is axially outwardly supported on a section of the casing 2 and supported axially inwardly on a radial flange forming the sleeve 16 and secured to the sleeve 16 in the region of its axially inner end. On the ring (see Figure 5). As a result, the sleeve 16 and the further blower wheel shaft 4 are spring-loaded in the direction of the fixed bearing 5 or in the direction of the adjusting screw 19.

When the blower 1 is operated, a negative pressure side A is formed on the blade side in the region of the blower wheel 7, and an overpressure side B is formed on the opposite side in the axial direction. The fixed bearing 5 is provided on the shaft end 8 of the blower impeller shaft 4 corresponding to the negative pressure side A. Therefore, when the blower 1 is operated, its overpressure causes the blower impeller shaft 4 to act in the axial direction toward the adjustment screw 19.

Applying to the fixed shaft by passing the adjusting screw 19 at one end of the axial direction The bearing 5 exerts a spring action on the other end of the shaft through the spring member 22, so that the axial orientation of the fixed bearing 5 is clear.

Prior to the first start of the blower 1, the blower wheel 7 can be oriented in a predetermined axial direction relative to the casing 2 by means of an adjusting screw 19. Thereby, a gap S can be formed between the blower impeller 7 (particularly, the axially outer end region of the blade 9) and the face of the casing 2 (see Fig. 6).

In a preferred embodiment, for this purpose, the adjusting screw 19 is first displaced axially outwards to a certain extent based on the rotation, so that the blower wheel 7 is supported on the facing faces of the casing 2 by the action of its blades 9 through the spring. on. Then, in the case where the adjusting screw 19 abuts against the bottom member 18, the adjusting screw 19 is further screwed at a predetermined angle, that is, axially displaced inwardly, whereby the bottom member 18 and the further fixing are made. The bearing 5 is dragged and driven together with the blower wheel shaft 4. The blower impellers 7 fixed to the blower impeller shaft 4 are correspondingly axially displaced together to form a gap S. The gap size a is obtained from the angle of rotation of the adjusting screw 19. Therefore, if the adjusting screw 19 having the metric fine thread of M12 × 1 is taken as an example, the adjusting screw 19 is rotated by 90 degrees corresponding to the gap size a of 0.25 mm.

It is preferred to provide an adjustment screw 19 having a self-locking thread such that the resulting gap size condition may only be intentional and preferably may be altered using a tool.

The foregoing embodiments are intended to illustrate the invention contained in the entire application, and the inventions are independently constructed at least separately from the prior art by a combination of the following features: a blower, characterized in that the blower impeller shaft 4 corresponds to a fixed The shaft end 8 of the bearing 5 is received in a sleeve 16 surrounding the rolling bearing 14, which The sleeve is movable relative to the casing 2, and in order to adjust the axial position of the shaft end 8, the sleeve 16 can be acted upon by at least one direction of the adjusting screw 19 supported on the casing 2; a blower, The utility model is characterized in that: the blower impeller 7 has a negative pressure side A and an overpressure side B; a blower, wherein the fixed bearing 5 is arranged on the shaft end 8 of the blower impeller shaft 4 corresponding to the negative pressure side A; a blower, The utility model is characterized in that: the blower impeller shaft 4 is elastically biased by the spring member 22 in the other axial direction of the adjusting screw 19; a blower, characterized in that the spring member 22 is attached to the floating bearing 6 and the machine of the blower impeller shaft 4 The role occurs between the shells 2.

A blower, characterized in that the sleeve 16 of the fixed bearing 5 is provided with a separate bottom part 18, and an adjusting screw 19 acts on the bottom part 18; a blower, characterized in that the adjusting screw 19 is provided with self Lock the thread.

All of the disclosed features (as a single feature or combination of features) are the essence of the invention. Therefore, the disclosure of the present application also contains all the contents disclosed in the related/attached priority file (copy of the prior application), and the features described in the file are also included in the patent application scope of the present application. The subsidiary item is characterized by its characteristics for the features of the prior art improvement of the prior art, and its main purpose is to make a divisional application on the basis of the claims.

2‧‧‧Chassis

4‧‧‧Blower impeller shaft

5‧‧‧Fixed bearings

8‧‧‧(Blower impeller shaft) shaft end

11‧‧‧Inlet

14‧‧‧ rolling bearings

15‧‧‧Support washer

16‧‧‧ casing

17‧‧‧Axial recess

18‧‧‧ bottom part

19‧‧‧Adjustment screws

20‧‧‧Threaded holes

21‧‧‧Tool hole

X‧‧‧axis axis

Claims (8)

A blower (1) having: a blower impeller (7), a blower impeller shaft (4), and a casing (2), wherein the blower impeller shaft (4) is a fixed bearing (5) and a floating bearing (6) And supported in the casing (2), wherein further, the blower impeller shaft (4) has a shaft axis (x) and is displaceable relative to the casing (2) in two opposite axial directions to achieve For adjustment purposes, and the fixed bearing (5) is generally displaceable relative to the casing (2) to form a gap (S) between the blower wheel (7) and the casing (2), characterized The shaft end (8) of the blower impeller shaft (4) corresponding to the fixed bearing (5) is received in a sleeve (16) surrounding the rolling bearing (14), and the sleeve (16) is Moving relative to the casing (2), and in order to adjust the axial position of the shaft end (8), at least in one direction can be acted upon by an adjusting screw (19) supported on the casing (2) The sleeve (16). The blower of claim 1, wherein the blower impeller (7) has a negative pressure side (A) and an overpressure side (B). A blower according to any of the preceding claims, wherein the fixed bearing (5) is provided on a shaft end (8) of the blower impeller shaft (4) corresponding to the negative pressure side (A). A blower according to any of the preceding claims, wherein the blower impeller shaft (4) is spring-loaded by a spring member (22) in the other axial direction of the adjusting screw (19). A blower according to any of the preceding claims, wherein the spring member (22) acts between the floating bearing (6) of the blower wheel shaft (4) and the casing (2). A blower according to any of the preceding claims, wherein the sleeve (16) of the fixed bearing (5) is provided with a separate bottom part (18), and the adjusting screw (19) acts on the bottom part (18). A blower according to any of the preceding claims, wherein the adjusting screw (19) is provided with a self-locking thread. An air blower characterized by having one of the foregoing claims or a plurality of distinguishing features.