CN214304422U

CN214304422U - Diffusion controller and compressor

Info

Publication number: CN214304422U
Application number: CN202023068758.9U
Authority: CN
Inventors: 李家荣; 沈鹏飞; 王星星
Original assignee: Mcquay Air Conditioning Refrigeration Suzhou Co Ltd
Current assignee: Mcquay Air Conditioning Refrigeration Suzhou Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-09-28
Anticipated expiration: 2030-12-18

Abstract

The application provides a diffusion controller and a compressor. The diffusion controller includes: the driving guide block is arranged on the peripheral surface of the inlet guide vane driving wheel and is provided with a guide surface, and the guide surface comprises an inclined surface inclined in the circumferential direction; a link provided radially outside the inlet guide vane drive wheel, an axial end of the link having a radial extent at least partially overlapping an axial extent of the guide surface, the guide surface abutting against the axial end of the link when the inlet guide vane drive wheel rotates to a position range in which the guide surface contacts the axial end of the link, and moving the axial end of the link between an axial first position and an axial second position; and a diffuser ring connected to the connecting rod to move with the connecting rod.

Description

Diffusion controller and compressor

Technical Field

The present application relates to the electromechanical field, and more particularly, to a diffusion controller and a compressor.

Background

Compressors are used in equipment that requires the compression of a fluid. The compressor has an impeller that is capable of acting on the fluid to increase the pressure of the fluid as it rotates. Generally, a compressor includes a diffuser disposed at an outlet of an impeller to stabilize a flowing fluid. In addition, the compressor may further include an Inlet Guide Vane (IGV) disposed at an Inlet of the impeller, and an opening degree of the Inlet Guide Vane may control a flow rate of fluid entering the compressor.

As the flow rate of the fluid in the compressor decreases, the fluid generally becomes unstable and some of the fluid stops flowing within the compressor and rotates with the impeller, causing a stall event. If the flow rate of the fluid continues to decrease, a surge phenomenon occurs, i.e., the fluid in the compressor becomes very unstable, and a reverse flow of the fluid, etc., occurs in many cases.

Methods to overcome stall or surge may typically be to reduce the degree of opening of the inlet guide vanes or to change the geometry of the diffuser to reduce the area at the impeller exit. Further, as the flow rate of the fluid increases, the degree of opening of the inlet guide vanes may be increased or the geometry of the diffuser may be changed to increase the area at the impeller exit.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

SUMMERY OF THE UTILITY MODEL

The inventors of the present application found that: in the existing compressor, the driving mechanisms need to be respectively arranged on the inlet guide vane and the diffuser for driving, and the driving mechanisms of the inlet guide vane and the diffuser need to be respectively driven and controlled, so that the hardware cost is high and the control complexity is high.

In order to solve the above problems or other similar problems, embodiments of the present application provide a diffusion controller and a compressor, in the diffusion controller of embodiments of the present application, a driving guide block is disposed on an outer periphery of an inlet guide vane driving wheel, the driving guide block can drive a connecting rod in a process of driving the inlet guide vane by the inlet guide vane driving wheel, and the connecting rod moves to drive a diffusion ring, so that the inlet guide vane and the diffusion ring can be driven in a linkage manner, a driving device and a separate driving control for the diffusion ring are not required to be separately provided, and hardware cost and control complexity are reduced.

According to an aspect of the embodiments of the present application, there is provided a diffusion controller, the diffusion controller is used for a compressor, the compressor is used for compressing fluid, the compressor includes a housing, an impeller, an Inlet Guide Vane (Inlet Guide Vane), an Inlet Guide Vane driving wheel and a diffusion flow channel, the impeller is installed in the housing, the diffusion flow channel is located in the housing, the Inlet Guide Vane is disposed at a fluid Inlet of the compressor, the Inlet Guide Vane driving wheel extends along an axial direction parallel to a central axis and drives the Inlet Guide Vane to rotate so as to adjust an opening degree of the Inlet Guide Vane, the diffusion controller includes:

the driving guide block is arranged on the peripheral surface of the inlet guide vane driving wheel and is provided with a guide surface, and the guide surface comprises an inclined surface inclined in the circumferential direction;

a link provided radially outside the inlet guide vane drive wheel, an axial end of the link having a radial extent at least partially overlapping an axial extent of the guide surface, the guide surface abutting against the axial end of the link when the inlet guide vane drive wheel rotates to a position range in which the guide surface contacts the axial end of the link, and moving the axial end of the link between an axial first position and an axial second position; and

a diffuser ring connected to the connecting rod for movement therewith, wherein the diffuser ring opens the diffuser flow passage when the axial end of the connecting rod is in the axial first position,

when the axial end of the connecting rod is at the axial second position, the diffusion ring adjusts the opening of the diffusion flow channel to a preset value.

According to another aspect of the embodiments of the present application, wherein when the inlet guide vane driving wheel rotates to a position range where the guide surface contacts the axial one end of the link, the inlet guide vane driving wheel rotates in a first direction, the opening degree of the inlet guide vane gradually decreases, and the axial one end of the link moves from the axial first position to the axial second position.

According to another aspect of the embodiments of the present application, wherein the diffusion controller further comprises:

and the limiting component controls when the axial end of the connecting rod is at the axial second position, so that the inlet guide vane driving wheel stops rotating in a first direction.

the elastic body is in contact with the connecting rod and provides restoring force for the connecting rod, and the direction of the restoring force is from the other axial end of the connecting rod to one axial end of the connecting rod.

the sleeve is positioned in the shell and connected with the shell, the sleeve is sleeved on the radial outer side of the connecting rod, and a supporting part for supporting one axial end of the elastic body is formed on the inner wall of the sleeve; and

and the shaft shoulder pressing block is sleeved on the radial outer side of the connecting rod and extends along the radial direction, and the other axial end of the elastic body is abutted against one surface of the shaft shoulder pressing block, which faces the diffusion ring.

According to another aspect of the embodiment of the present application, wherein the link has a first notched portion on a side of the link near the other end in the axial direction,

the first notch portion has:

a lower wall surface which is located on an upper side of the other axial end of the connecting rod and is perpendicular to the axial direction;

an upper wall surface located on an upper side of the lower wall surface and perpendicular to the axial direction;

and a side wall surface located between the upper wall surface and the lower wall surface and parallel to the axial direction.

According to another aspect of an embodiment of the present application, wherein the diffuser ring comprises:

a main body portion that is annular and extends in an axial direction; and

a second cutout portion provided axially below the main body portion,

the second notch portion has:

a first side parallel to the axial direction;

a second side surface parallel to the axial direction;

a bottom surface located between the first side surface and the second side surface, perpendicular to the axial direction,

in the case where the diffuser ring is coupled to the connecting rod,

an outer peripheral surface or an inner peripheral surface of the main body portion is disposed opposite to the side wall surface of the first notch portion,

the lower wall surface of the first cutout portion supports the bottom surface of the second cutout portion,

an axially upper end surface of the main body portion is disposed opposite to the upper wall surface of the first cutout portion.

According to another aspect of the embodiments of the present application, wherein the diffuser ring further comprises:

a boss portion located at an axially upper end of the main body portion of the diffuser ring.

According to another aspect of the embodiments of the present application, wherein the link further has:

a rolling member located at the one axial end of the link.

a shaft located on a side of the link close to the one end in the axial direction, the shaft supporting the rolling member; and

a third notch portion located on one side of the link rod near the one end in the axial direction,

the third notch portion has:

a third side parallel to the axial direction; and

a fourth side surface parallel to the axial direction,

the shaft is supported at the third side surface and the fourth side surface,

the rolling member is located between the third side and the fourth side.

According to another aspect of the embodiments of the present application, wherein the driving guide block further has:

an installation part inserted into an installation groove on the outer circumferential surface of the inlet guide vane driving wheel; and

and the first mounting hole of the driving guide block radially penetrates through the mounting part, and under the condition that the mounting part is inserted into the mounting groove, the first mounting hole of the driving guide block is communicated with the second mounting hole of the driving guide block of the mounting groove.

According to another aspect of the embodiments of the present application, wherein the guide surface is a curved surface.

According to another aspect of the embodiments of the present application, wherein the guide surface further comprises an extension surface,

the extension surface is perpendicular to the axial direction, and the extension surface is connected with one end, which is closer to the diffusion ring, of the inclined surface in the axial direction.

According to another aspect of the embodiments of the present application, the number of the driving guide blocks is more than 2, the number of the driving guide blocks is the same as the number of the connecting rods, and the driving guide blocks are uniformly distributed in the circumferential direction of the inlet guide vane driving wheel by more than 2.

According to another aspect of embodiments of the present application, there is provided a compressor including the diffusion controller according to any one of the above aspects of the embodiments.

One of the beneficial effects of the embodiment of the application lies in: the drive guide block is arranged at the periphery of the inlet guide vane drive wheel, the drive guide block can drive the connecting rod in the process of driving the inlet guide vane by the inlet guide vane drive wheel, and the movement of the connecting rod drives the diffusion ring to move, so that the inlet guide vane and the diffusion ring can be driven in a linkage manner, a drive device is not required to be arranged on the diffusion ring alone, the drive control is not required to be carried out on the diffusion ring alone, and the hardware cost and the control complexity are reduced.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the present application include many variations, modifications, and equivalents within the scope of the terms of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

Elements and features described in one drawing or one implementation of an embodiment of the application may be combined with elements and features shown in one or more other drawings or implementations. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts for use in more than one embodiment.

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic perspective view of a portion of a compressor having a diffusion controller of an embodiment of a first aspect;

FIG. 2 is a schematic view of the portion of the compressor viewed axially from the inlet guide vane side;

FIG. 3 is a schematic cross-sectional view of one axis viewed in the direction A-A of FIG. 2;

FIG. 4 is another schematic view of a portion of the compressor as viewed axially from the inlet guide vane side;

FIG. 5 is a schematic cross-sectional view of one axis as viewed in the direction B-B of FIG. 4;

FIG. 6 is a schematic view of the relationship between the opening of the inlet guide vanes and the opening of the diffuser flow path;

FIG. 7 is a perspective view of the connecting rod and diffuser ring being integrally connected;

FIG. 8 is a side schematic view of a portion of a connecting rod;

FIG. 9 is a perspective view of the diffuser ring;

FIG. 10 is a schematic perspective view of the inlet guide vane drive wheel;

FIG. 11 is a perspective view of the drive guide;

fig. 12 is another perspective view of the drive guide shoe.

Detailed Description

The foregoing and other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the application are disclosed in detail as being indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the described embodiments, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims. Various embodiments of the present application will be described below with reference to the drawings. These embodiments are merely exemplary and are not intended to limit the present application.

In the embodiments of the present application, the terms "first", "second", "upper", "lower", and the like are used to distinguish different elements by name, but do not indicate a spatial arrangement, a temporal order, and the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.

In the embodiments of the present application, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "comprising" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.

In addition, in the following description of the embodiments of the present application, the extending direction of the central axis of the inlet guide vane driving wheel is referred to as "axial direction"; in the "axial direction", a direction directed from the diffuser ring to the Inlet Guide Vanes (IGVs) is referred to as an "up" direction, and a direction opposite to the "up" direction is referred to as a "down" direction; a side away from the central axis in the radial direction is referred to as "radially outer side", and a side close to the central axis in the radial direction is referred to as "radially inner side"; the direction around this central axis is referred to as "circumferential".

It should be noted that the "up" direction and the "down" direction of the present application are only for convenience of description of the present application, and do not indicate the directions of the diffusion controller and the compressor of the present application in manufacture and use.

Embodiments of the first aspect

Embodiments of a first aspect of the present application provide a diffusion controller. Fig. 1 is a perspective view of a portion of a compressor having the diffusion controller, fig. 2 is a schematic view of the portion of the compressor viewed axially from an inlet guide vane side, and fig. 3 is an axial sectional view viewed in a-a direction of fig. 2.

As shown in fig. 1, 2 and 3, the compressor 100 includes: a casing 1, an impeller 2 (shown in fig. 3), an Inlet Guide Vane (Inlet Guide Vane)3, an Inlet Guide Vane drive wheel 4 (shown in fig. 1 and 2), and a diffuser flow path 5 (shown in fig. 3).

As shown in fig. 3, the impeller 2 is installed in the casing 1, and the diffusion flow path 5 is located in the casing 1.

As shown in fig. 1, 2 and 3, the inlet guide vanes 3 are provided at a fluid inlet 101 of the compressor.

As shown in fig. 1, the inlet guide vane drive wheel 4 has a central axis C. The inlet guide vane drive wheel 4 extends in an axial direction parallel to the central axis C and drives the inlet guide vane 3 to rotate to adjust the opening degree of the inlet guide vane 3. The opening degree of the inlet guide vanes 3 is the opening degree of the fluid inlet 101.

In some embodiments, as shown in fig. 1 and 2, the inlet guide vane drive wheel 4 is of a geared construction, e.g., the outer circumferential surface of the inlet guide vane drive wheel 4 has teeth. The present application may not be limited thereto, and the inlet guide vane drive wheel 4 may not have teeth.

In fig. 1, a driven gear 31 is arranged on the axial lower side of the inlet guide vane driving wheel 4, the driven gear 31 is engaged with the teeth of the inlet guide vane driving wheel 4, and the driven gear 31 is connected with a rotating shaft 32; as shown in fig. 3, the rotary shaft 32 extends radially inward and is connected to the inlet guide vane 3; from this, when inlet guide vane drive wheel 4 rotated round central axis C, driven gear 31 drove pivot 32 and rotates, and pivot 32 drove inlet guide vane 3 and rotates to the degree of opening of adjustment inlet guide vane 3.

For example, when the inlet guide vane drive wheel 4 is rotated according to the first direction D1 of fig. 1, the opening degree of the inlet guide vane 3 gradually decreases, i.e., the inlet guide vane 3 gradually covers the fluid inlet 101; when the inlet guide vane drive wheel 4 is rotated according to the second direction D2 of fig. 1, the opening degree of the inlet guide vanes 3 gradually increases, i.e. the area of the inlet guide vanes 3 covering the fluid inlet 101 gradually decreases, and the second direction D2 is opposite to the first direction D1.

In addition, the present application may not be limited thereto, and the inlet guide vane driving wheel 4 may also realize driving of the inlet guide vane 3 by other structures. For example, the driven gear 31 may also be provided on the axially upper side of the inlet guide vane drive wheel 4; for another example, the inlet guide vane drive wheel 4 has no teeth on its outer periphery, and the inlet guide vane drive wheel 4 can drive the inlet guide vane 31 by a link mechanism.

Fig. 4 is another schematic view of a portion of the compressor viewed in an axial direction from the inlet guide vane side, and fig. 5 is an axial sectional view viewed in a direction B-B of fig. 4.

Fig. 4 shows the inlet guide vane 3 when it is at its lowest opening, i.e. the inlet guide vane 3 covers the fluid inlet 101 such that the fluid inlet 101 is at its lowest opening, e.g. the radial length of the inlet guide vane 3 is at a distance from the center of the fluid inlet 101, and when the inlet guide vane 3 is at its lowest opening, there is a small hole 1011 in the center of the fluid inlet 101 for the fluid to flow in (as shown in fig. 4). Fig. 2 shows a case in which the inlet guide vane 3 is open to a greater extent than the inlet guide vane 3 of fig. 4, i.e. the inlet guide vane 3 partially covers the fluid inlet 101.

As shown in fig. 1 and 2, the compressor 100 may further include: a drive device 6. As shown in fig. 2, the driving device 6 may comprise a driving body 61 and a driving gear 62, the driving gear 62 may be meshed with the inlet guide vane driving wheel 4. Thereby, the driving body 61 may generate a driving force to rotate the driving gear 62, and the inlet guide vane driving wheel 4 is rotated by the driving gear 62.

Further, the compressor 100 may further include other components not shown in fig. 1, 2, and 3, for example, a motor for driving the impeller 2, and the like. With respect to other structures of the compressor 100, reference may be made to the related art.

As shown in fig. 1, 2 and 3, the diffusion controller 10 includes: a drive guide 11, a connecting rod 12 and a diffuser ring 13 (shown in fig. 3).

As shown in fig. 1, the driving guide block 11 is disposed on the outer peripheral surface of the inlet guide vane driving wheel 4, the driving guide block 11 has a guide surface 111, and the guide surface 111 includes an inclined surface inclined in the circumferential direction, that is, a projection of the inclined surface forms an angle of not 90 degrees with the central axis C as viewed in the radial direction.

As shown in fig. 1 and 3, the connecting rod 12 extends in the axial direction. As shown in fig. 1, 2 and 3, the connecting rod 12 is disposed radially outward of the inlet guide vane drive wheel 4. As shown in fig. 2 and 3, the radial extent of one axial end of the connecting rod 12 (e.g., the upper axial end of the connecting rod 12) at least partially overlaps the radial extent of the guide surface 111. As shown in fig. 3, the diffuser ring 13 is connected to the connecting rod 12, and the diffuser ring 13 is movable with the connecting rod 12, for example, the diffuser ring 13 is connected to the other end (i.e., the lower end) side in the axial direction of the connecting rod 12, and the diffuser ring 13 is movable with the connecting rod 12 in the axial direction.

In the present application, when the inlet guide vane drive wheel 4 rotates to a position range where the guide surface 111 contacts the one axial end of the link 12, the guide surface 111 abuts the one axial end of the link 12, and the one axial end of the link 12 is guided to move in the axial direction, for example, the one axial end of the link 12 is guided to move between the first axial position and the second axial position. Wherein, when the axial end of the connecting rod 12 is at the axial first position, the diffuser ring 13 opens the diffuser flow path 5; when the one axial end of the connecting rod 12 is at the second axial position, the diffuser ring 13 blocks the diffuser flow path 5 and adjusts the opening degree of the diffuser flow path 5 to a predetermined value, for example, 10%, that is, the ratio of the opening width of the diffuser flow path 5 to the maximum opening width of the diffuser flow path 5 is 10%.

According to the embodiment of the first aspect of the application, set up the drive guide block in the periphery of import stator drive wheel, at the in-process through import stator drive wheel drive import stator, the drive guide block can drive the connecting rod, the motion of connecting rod drives the diffusion ring motion, thereby adjust the degree of opening of diffusion runner 5, consequently, the embodiment of the first aspect of the application can drive import stator and diffusion ring with linking, needn't set up drive arrangement alone and carry out drive control alone for the diffusion ring, hardware cost and the complexity of control have been reduced.

In at least one embodiment, when the inlet guide vane drive wheel 4 rotates to a position range where the guide surface 111 contacts with one axial end (e.g., upper end) of the connecting rod 12, the opening degree of the diffuser flow passage 5 and the opening degree of the inlet guide vane 3 may be in positive correlation, for example: if the inlet guide vane drive wheel 4 rotates in the first direction D1, the opening degree of the inlet guide vane 3 gradually decreases, and the one axial end of the link 12 moves from the axial first position to the axial second position, so that the diffuser flow path 5 gradually decreases; if the inlet guide vane drive wheel 4 rotates in the second direction D2, the opening degree of the inlet guide vane 3 gradually increases, and the one axial end of the link 12 moves from the axial second position to the axial first position, so that the diffuser 5 gradually expands. Further, when the inlet guide vane drive wheel 4 rotates to a position range where the guide surface 111 does not contact one axial end of the link 12 (for example, the link 12 is located on the downstream side of the drive guide 11 in the first direction D1, that is, the drive guide 11 continues to rotate in the direction D1 to reach the circumferential position where the link 12 is located), the one axial end of the link 12 is held at the first axial position.

Fig. 6 is a schematic view of the relationship between the opening degree of the inlet guide vane 3 and the opening degree of the diffuser flow passage 5. As shown in fig. 6, in the section 601, the guide surface 111 is not in contact with one axial end of the link 12, and therefore, the inlet guide vane drive wheel 4 rotates to change the opening degree of the inlet guide vane 3 while the one axial end of the link 12 is maintained at the axial first position, and the diffuser ring 13 does not block the diffuser flow path 5, so that the opening degree of the diffuser flow path 5 is maintained at the maximum (i.e., 100%). When the opening degree of inlet guide vane 3 becomes a value shown by 602 (for example, 47%), guide surface 111 comes into contact with one axial end of connecting rod 12. In the section 603, the guide surface 111 is in contact with one axial end of the link 12, and the inlet guide vane drive wheel 4 rotates to adjust the opening degree of the inlet guide vane 3 and the opening degree of the diffuser flow path 5 in an interlocking manner, for example, the inlet guide vane drive wheel 4 rotates to change the opening degree of the inlet guide vane 3 and the opening degree of the diffuser flow path 5 in a positive correlation, that is, the shape of the curve 600 in the section 603 is determined by the shape of the guide surface 111. As shown in 604, when the inlet guide vane drive wheel 4 rotates to a position where the opening degree of the inlet guide vane 3 is 0 (i.e., the inlet guide vane 3 is closed), the guide surface 111 pushes the axial one end of the link 12 to the axial second position, whereby the opening degree of the diffuser flow path 5 is adjusted to the minimum value, for example, 10%.

Fig. 2 and 3 may correspond to the situation illustrated at 602 in fig. 6, i.e., the guide surface 111 comes into contact with an axial end of the link 12 (corresponding to the case where the inlet guide vane drive wheel 4 moves in the first direction D1) or comes out of contact (corresponding to the case where the inlet guide vane drive wheel 4 moves in the second direction D2). The diffusion ring 13 in fig. 3 does not block the diffusion flow channels 5.

Fig. 4 and 5 may correspond to the situation shown at 604 in fig. 6, i.e. the guide surface 111 pushes the axial end of the connecting rod 12 to the axial second position. The diffuser ring 13 in fig. 5 is lowered to the lowest position in the axial direction, thereby blocking the diffuser flow path 5 and adjusting the opening degree of the diffuser flow path 5 to the minimum value.

As shown in fig. 2, the diffusion controller 10 further includes: a stop member 14. When one axial end of the connecting rod 12 is at the second axial position, the limiting component 14 can control the inlet guide vane driving wheel 4 to stop rotating in the first direction D1, so that the limiting component 14 can limit the limit position of the inlet guide vane driving wheel 4 rotating corresponding to the minimum opening degree of the inlet guide vane 3, that is, the limit position of the inlet guide vane driving wheel 4 rotating in the first direction D1 when the opening degree of the inlet guide vane 3 reaches the minimum value; in addition, the limiting member 14 can also prevent the inlet guide vane drive wheel 4 from over-rotating in the first direction D1 to cause the upper end of the link 2 to slide out of the guide surface 111 (e.g., the upper end of the link 2 slides out of the extending surface 1112 of the guide surface 111 as shown in fig. 12), thereby preventing the upper end of the link 2 from coming out of contact with the guide surface 111. The limiting component 14 can be a microswitch, and indirectly controls the inlet guide vane driving wheel 4 to stop rotating by controlling a motor of the driving mechanism; alternatively, the limiting member 14 may have a mechanical limiting structure, and direct control of the inlet guide vane driving wheel 4 may be achieved.

Further, as shown in fig. 2, the diffusion controller 10 further includes: a stopper member 141 is added. When the opening degree of the inlet guide vane 3 is the maximum, the additional stopper member 141 can be controlled so that the inlet guide vane drive wheel 4 stops rotating in the second direction D2. Thus, the stopper member 14 can define the extreme position of the rotation of the inlet guide vane drive wheel 4 corresponding to the maximum opening degree of the inlet guide vane 3, that is, the extreme position of the rotation of the inlet guide vane drive wheel 4 in the second direction D2 when the opening degree of the inlet guide vane 3 reaches the maximum value. The additional limiting part 141 can be a microswitch which indirectly controls the inlet guide vane driving wheel 4 to stop rotating by controlling a motor of the driving mechanism; alternatively, the additional limiting member 141 may have a mechanical limiting structure, and direct control of the inlet guide vane driving wheel 4 may be achieved.

Further, as shown in fig. 2, the diffusion controller 10 may further include: a trigger member 142 provided on the inlet guide vane drive wheel 4. The trigger member 142 may contact the position-limiting member 14 and/or the additional position-limiting member 141 to trigger the position-limiting member 14 and/or the additional position-limiting member 141 to generate a position-limiting effect, i.e., to stop the inlet guide vane drive wheel 4 from rotating in the first direction D1 or to stop the inlet guide vane drive wheel 4 from rotating in the second direction D2.

As shown in fig. 1 and 3, the diffusion controller 10 further includes: and an elastic body 15. The elastic body 15 is in contact with the link 12, and provides the link 12 with a restoring force directed from the other axial end (e.g., lower end) of the link 12 toward one axial end (e.g., upper end) of the link 12, i.e., in an axially upward direction. When the guide surface 111 moves to a range not contacting the one axial end of the link 12 (for example, a range corresponding to the section 601 of fig. 6), the restoring force and the stopper groove 51 (shown in fig. 3) on the upper side of the diffuser flow path 5 can maintain the position of the link 12 such that the one axial end of the link 12 is located at the first axial position, thereby maintaining the maximum opening degree of the diffuser flow path 5. For example, the elastic body 15 may be a spring.

Further, since the vibration of the link 12 is excessively large due to the elastic body 15 (e.g., a spring) in a free state and it is necessary to avoid the vibration as much as possible during use, the stopper groove 51 restricts the excessive upward movement of the link 12 to avoid the excessive vibration of the link 12. Wherein the limiting groove 51 may be a part of the housing 1.

As shown in fig. 1 and 3, the diffusion controller 10 further includes: a sleeve 16. The sleeve 16 is located inside the housing 1 and is connected to the housing 1. The sleeve 16 is sleeved on the radial outer side of the connecting rod 12. As shown in fig. 3, the inner wall of the sleeve 16 is formed with a support portion 161 that supports one axial end of the elastic body 15 (i.e., the axial lower end of the elastic body 15).

As shown in fig. 1 and 3, the diffusion controller 10 further includes: a shoulder press 17 and a locking member 18. The shaft shoulder pressing block 17 is sleeved on the radial outer side of the connecting rod 12 and extends in the radial direction, and the other axial end of the elastic body 15 abuts against one surface of the shaft shoulder pressing block 17 facing the diffuser ring 13, for example, one surface of the shaft shoulder pressing block 17 facing the diffuser ring 13 may be formed with a clamping groove to accommodate the other axial end of the elastic body 15 (i.e., the upper axial end of the elastic body 15). The locking member 18 is connected to the connecting rod 12 and abuts against a surface of the shoulder press 17 facing away from the diffuser ring 13. For example, the locking member 18 may be a lock nut having an internal thread, and the outer circumference of the connecting rod 12 may be provided with an external thread, whereby the locking member 18 may be fastened to the connecting rod 12. Further, the present application may not be limited thereto, and for example, the shoulder pressing piece 17 may be directly fixed to the connecting rod 12 or may be integrally formed with both, and thus, the locking member 18 may not be necessarily provided.

Fig. 7 is a perspective view illustrating the connecting rod 12 and the diffuser ring 13 connected integrally. The connecting rod 12, diffuser ring 13, elastomer 15, shoulder press 17 and locking element 18 are shown in fig. 7.

Fig. 8 is a side view of a portion of the connecting rod 12. As shown in fig. 8, the link 12 has a first notched portion 121, and the first notched portion 121 is located on a side of the link 12 near the other end (e.g., the lower end) in the axial direction. The first notch 121 includes: a lower wall 1211 located on an upper side of the other end of the link 12 in the axial direction, perpendicular to the axial direction; an upper wall surface 1212 which is located on an upper side of the lower wall surface 1211 and is perpendicular to the axial direction; and a side wall surface 1213, which is located between the upper wall surface 1212 and the lower wall surface 1211, parallel to the axial direction. Further, as shown in fig. 7 and 8, the link 12 may further have a first mounting hole 1214, and a penetrating direction of the first mounting hole 1214 may be perpendicular to the side wall surface 1213.

Fig. 9 is a perspective view of diffuser ring 13. As shown in fig. 9, the diffuser ring 13 includes: a body 131 having an annular shape and extending in an axial direction; and a second notch 132 provided axially below the body 131.

As shown in fig. 9, the second notch portion 132 includes: a first side 1321 parallel to the axial direction; a second side 1322 which is parallel to the axial direction; a bottom surface 1323, which is located between the first side surface 1321 and the second side surface 1322, is perpendicular to the axial direction. When the diffuser ring 13 is coupled to the connecting rod 12, the outer peripheral surface of the main body 131 is disposed to face the side wall surface 1213 of the first cutout portion 121, the lower wall surface 1211 of the first cutout portion 121 supports the bottom surface 1323 of the second cutout portion 132, and the axial upper end 131a of the main body 131 is disposed to face the upper wall surface 1212 of the first cutout portion 121.

Further, the diffuser ring 13 may further include: and a second mounting hole 133. The second mounting hole 133 penetrates the main body portion 131 from the radial direction, and is located axially above the second cutout portion 132. In the case where the diffuser ring 13 is coupled to the connecting rod 12, the second mounting hole 133 and the first mounting hole 1214 may be aligned, and a fixing member such as a screw may be inserted into the second mounting hole 133 and the first mounting hole 1214 to securely couple the diffuser ring 13 and the connecting rod 12.

As shown in fig. 9, the diffuser ring 13 may further include: the boss 134. The boss 134 is located at the axial upper end 131a of the diffuser ring body 131. For example, the projection 134 may extend axially upward from the axial upper end 131a of the diffuser ring body 131. When the connecting rod 12 drives the diffuser ring 13 to move upward in the axial direction, the protrusion 134 can contact with the limiting groove 51 shown in fig. 5 (for example, the protrusion 134 extends into the limiting groove 51 and abuts against the bottom of the limiting groove 51 in the axial direction), so that excessive upward movement of the connecting rod 12 and the diffuser ring is limited, and excessive vibration of the connecting rod 12 is avoided. Thus, the boss 134 is in contact with the stopper groove 51, rather than the entire periphery of the upper end 131a of the diffuser ring 13 being in contact with the stopper groove 51, and the material of the diffuser ring 13 can be reduced, thereby reducing the cost. Further, the number of the convex portions 134 may be 2 or more, for example, 3 convex portions 134 are shown in fig. 9. The 2 or more protrusions 134 may be uniformly distributed in the circumferential direction of the diffuser ring main body 131.

As shown in fig. 7, the link 12 may further have: rolling members 122. The rolling member 122 is located at the one end (i.e., the upper end) of the connecting rod 12. Thus, at the upper end of the link 12, the rolling member 122 contacts the guide surface 111, so that friction can be reduced and the link 12 can be driven easily.

As shown in fig. 7, the rolling member 122 may be a roller, a bearing, or the like, and the connecting rod 12 may further have: and a shaft 123. The shaft 123 is located on the side of the connecting rod 12 near one end in the axial direction. The shaft 123 may support the rolling member 122, for example, when the rolling member 122 is a roller, the shaft 123 may support the roller, and when the rolling member 122 is a bearing, the shaft 123 may be a central shaft of the bearing.

As shown in fig. 8, the link 12 further has: and a third notch portion 124 located on one side of the link close to one end in the axial direction. The third notch portion 124 has: a third side 1241, which is parallel to the axial direction; and a fourth side 1242, which is parallel to the axial direction. The shaft 123 of fig. 7 may be supported on the third and

fourth sides

1241 and 1242, and the rolling member 122 of fig. 7 may be located between the third and

fourth sides

1241 and 1242.

Fig. 10 is a perspective view of the inlet guide vane drive wheel 4. As shown in fig. 10, the outer peripheral surface of the inlet guide vane drive wheel 4 is provided with a mounting groove 41. The mounting recess 41 may be rectangular as viewed in the radial direction. The mounting recess 41 has a second mounting hole 42 for a drive guide block radially penetrating the inlet guide vane drive wheel 4.

Fig. 11 is a perspective view of a driving guide block, and fig. 12 is another perspective view of the driving guide block. As shown in fig. 11 and 12, the drive guide block 11 further includes: an attachment portion 112 to be inserted into the attachment groove 41 on the outer peripheral surface of the inlet guide vane drive wheel 4 in fig. 10; and a drive guide first mounting hole 113 penetrating the mounting portion 113 in the radial direction, the drive guide first mounting hole 113 communicating with the drive guide second mounting hole 42 in the mounting recess 41 shown in fig. 11 in a state where the mounting portion 113 is inserted into the mounting recess 41 shown in fig. 11. Fixing members such as screws may be inserted into the drive guide block first mounting hole 113 and the drive guide block second mounting hole 42 to firmly connect the drive guide block 11 with the inlet guide vane drive wheel 4.

As shown in FIG. 11, in at least one embodiment, the beveled portion 1111 of the guide surface 111 may be curved. For example, the shape of the inclined surface may be determined according to a resultant motion of the axial displacement of the one axial end of the connecting rod 12 and the circumferential motion of the driving guide 11, thereby ensuring that the inclined surface is always in line contact or point contact with the one axial end of the connecting rod 12, thereby reducing the wear of the one axial end of the connecting rod 12. Also, the shape of the slope portion 1111 can ensure that the relationship between the opening degree of the inlet guide vane 3 and the opening degree of the diffuser flow passage 5 conforms to a predetermined curve (e.g., the curve 600 of fig. 6). Further, in the present application, the relationship between the opening degree of the inlet guide vane 3 and the opening degree of the diffuser flow passage 5 can be adjusted to be suitable for different compressors or different applications of the same compressor by simply adjusting the shape of the slope portion 1111 of the guide surface 111.

As shown in fig. 12, the guide surface 111 may include an extension surface 1112 in addition to the ramp portion 1111. The extension surface 1112 may be a plane and perpendicular to the axial direction, and the extension surface 1112 is connected to an end 1113 of the inclined surface 1111 in the axial direction closer to the diffuser ring 13. Thus, when the stop member 14 shown in fig. 2 fails to stop the rotation of the inlet guide vane drive wheel 4 in the first direction D1, the extension surface 1112 can hold the one axial end of the link 12 in the second axial position. If the link 12 is out of contact with the guide surface 111, the link 12 is lifted by the spring force and is hard to return to the contact state with the guide surface 111, so the extension surface 1112 can be a safety margin for keeping the contact between the link 12 and the guide surface 111.

In at least one embodiment, the number of the driving guide blocks 11 is the same as the number of the connecting rods 12, the number of the driving guide blocks 11 is 2 or more, and 2 or more driving guide blocks 11 and connecting rods 12 are uniformly distributed in the circumferential direction of the inlet guide vane driving wheel 4. This can keep the diffuser ring 13 stable.

Embodiments of the second aspect

Embodiments of the second aspect of the present application provide a compressor comprising a diffusion controller 10 as described in embodiments of the first aspect.

In the embodiment of the first aspect, the structure of the diffusion controller 10 has been described in detail, the contents of which are incorporated herein, and the description is omitted here.

The compressor of the embodiment of the second aspect of the present application is, for example, a centrifugal compressor, which may be applied, for example, in a Heating Ventilating and Air Conditioning (HAVC) system or a refrigeration unit of a refrigeration system. The compressor of the embodiment of the second aspect of the present application may be, for example, the compressor 100 shown in fig. 1.

According to the embodiment of the second aspect of the application, in the compressor, set up the drive guide block in the periphery of import stator drive wheel, at the in-process through import stator drive wheel drive import stator, the drive guide block can drive the connecting rod, the motion of connecting rod drives the motion of diffusion ring, thereby the degree of opening of adjustment diffusion runner, consequently, the embodiment of the second aspect of the application can drive import stator and diffusion ring linkage, needn't set up drive arrangement alone and carry out drive control alone for the diffusion ring, hardware cost and the complexity of control have been reduced.

The present application has been described in conjunction with specific embodiments, but it should be understood by those skilled in the art that these descriptions are intended to be illustrative, and not limiting. Various modifications and adaptations of the present application may occur to those skilled in the art based on the spirit and principles of the application and are within the scope of the application.

Claims

1. A diffusion controller for a compressor for compressing a fluid, the compressor comprising a housing, an impeller mounted within the housing, an inlet guide vane drive wheel and a diffusion channel, the diffusion channel being located within the housing, the inlet guide vane being disposed at a fluid inlet of the compressor, the inlet guide vane drive wheel extending in an axial direction parallel to a central axis and driving the inlet guide vane to rotate to adjust an opening degree of the inlet guide vane,

characterized in that the diffusion controller comprises:

a diffuser ring coupled to the link rod for movement therewith,

wherein the content of the first and second substances,

the diffuser ring opens the diffuser flow passage when the axial end of the connecting rod is in the axial first position,

2. The diffusion controller of claim 1,

when the inlet guide vane drive wheel rotates to a position range where the guide surface contacts the one axial end of the link,

the inlet guide vane drive wheel rotates in a first direction, the opening degree of the inlet guide vane gradually decreases, and the axial end of the connecting rod moves from the axial first position to the axial second position.

3. The diffusion controller of claim 2, further comprising:

4. The diffusion controller of claim 1, further comprising:

5. The diffusion controller of claim 4, further comprising:

6. The diffusion controller of claim 1,

the link has a first notch portion located on one side of the link close to the other end in the axial direction,

the first notch portion has:

7. The diffusion controller of claim 6,

the diffuser ring includes:

a main body portion that is annular and extends in an axial direction; and

a second cutout portion provided axially below the main body portion,

the second notch portion has:

a first side parallel to the axial direction;

a second side surface parallel to the axial direction;

in the case where the diffuser ring is coupled to the connecting rod,

8. The diffusion controller of claim 7,

the diffuser ring further includes:

9. The diffusion controller of claim 1,

the connecting rod further has:

a rolling member located at the one axial end of the link.

10. The diffusion controller of claim 9,

the connecting rod further has:

the third notch portion has:

a third side parallel to the axial direction; and

a fourth side surface parallel to the axial direction,

the shaft is supported at the third side surface and the fourth side surface,

the rolling member is located between the third side and the fourth side.

11. The diffusion controller of claim 1,

the drive guide block further has:

12. The diffusion controller of claim 1,

the guide surface is a curved surface.

13. The diffusion controller of claim 1,

the guide surface further comprises an extension surface,

14. The diffusion controller of claim 1,

the quantity of drive guide block is more than 2, the quantity of drive guide block with the quantity of connecting rod is the same, more than 2 the drive guide block is in the circumference evenly distributed of import stator drive wheel.

15. A compressor comprising a diffusion controller as claimed in any one of claims 1 to 14.