Diffusion controllers and compressors

Abstract

The present application provides a diffusion controller and a compressor. The diffusion controller includes: a driving guide block, which is arranged on the outer peripheral surface of the inlet guide vane driving wheel, the driving guide block has a guide surface, and the guide surface includes an inclined surface inclined in the circumferential direction; a connecting rod, which is arranged on the radial outer side of the inlet guide vane driving wheel, the radial range of the axial end of the connecting rod at least partially overlaps with the radial range of the guide surface, when the inlet guide vane driving wheel rotates to the position range where the guide surface contacts the axial end of the connecting rod, the guide surface abuts against the axial end of the connecting rod, so that the axial end of the connecting rod moves between the first axial position and the second axial position; and a diffusion ring, which is connected to the connecting rod and moves with the connecting rod.

Description

Technical Field

[0001] The present application relates to the field of electromechanics, and in particular to a diffusion controller and a compressor. Background Art

[0002] Compressors are used in devices that require compressed fluid. The compressor has an impeller that acts on the fluid when it rotates to increase the pressure of the fluid. Usually, the compressor includes a diffuser arranged at the outlet of the impeller to stabilize the flowing fluid. In addition, the compressor may also include an inlet guide vane (IGV) arranged at the inlet of the impeller. The opening degree of the inlet guide vane can control the flow rate of the fluid entering the compressor.

[0003] When the flow rate of the fluid in the compressor decreases, the fluid usually becomes unstable, some of the fluid stops flowing in the compressor, and stalls as the impeller rotates. If the flow rate of the fluid continues to decrease, surge occurs, that is, the fluid in the compressor becomes very unstable, and in many cases, reverse flow of the fluid occurs.

[0004] The method to overcome stall or surge is usually to reduce the opening degree of the inlet guide vane or change the geometry of the diffuser to reduce the area at the impeller outlet. In addition, when the flow rate of the fluid increases, the opening degree of the inlet guide vane can be increased or the geometry of the diffuser can be changed to increase the area at the impeller outlet.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0006] The inventors of the present application have found that in existing compressors, driving mechanisms need to be provided for the inlet guide vanes and the diffusers respectively, and the driving mechanisms of the inlet guide vanes and the diffusers need to be driven and controlled respectively, so the hardware cost is high and the control complexity is high.

[0007] In order to solve the above-mentioned problems or other similar problems, an embodiment of the present application provides a diffusion controller and a compressor. In the diffusion controller of the embodiment of the present application, a driving guide block is provided at the periphery of the inlet guide vane driving wheel. In the process of driving the inlet guide vane by the inlet guide vane driving wheel, the driving guide block can drive the connecting rod, and the movement of the connecting rod drives the movement of the diffusion ring. Therefore, the inlet guide vane and the diffusion ring can be driven in a linkage manner, and there is no need to separately provide a driving device for the diffusion ring and perform separate drive control, thereby reducing hardware costs and control complexity.

[0008] According to one aspect of an embodiment of the present application, a diffusion controller is provided, the diffusion controller is used for a compressor, the compressor is used for compressing a fluid, the compressor comprises a casing, an impeller, an inlet guide vane, an inlet guide vane driving wheel and a diffusion channel, the impeller is installed in the casing, the diffusion channel is located in the casing, the inlet guide vane is arranged at the 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 the opening degree of the inlet guide vane, the diffusion controller comprises:

[0009] A driving guide block, which is arranged on the outer circumferential surface of the inlet guide vane driving wheel, the driving guide block has a guide surface, and the guide surface includes an inclined surface inclined in the circumferential direction;

[0010] a connecting rod disposed radially outside the inlet guide vane drive wheel, wherein the radial range of one axial end of the connecting rod at least partially overlaps the radial range of the guide surface, and when the inlet guide vane drive wheel rotates to a position range where the guide surface contacts the one axial end of the connecting rod, the guide surface abuts against the one axial end of the connecting rod, so that the one axial end of the connecting rod moves between a first axial position and a second axial position; and

[0011] a diffusion ring connected to the connecting rod and moving with the connecting rod, wherein when the axial end of the connecting rod is at the axial first position, the diffusion ring opens the diffusion flow channel,

[0012] When the axial end of the connecting rod is at the second axial position, the diffusion ring adjusts the opening of the diffusion flow channel to a predetermined value.

[0013] According to another aspect of an embodiment of the present application, when the inlet guide vane drive wheel rotates to a position range where the guide surface contacts the axial end of the connecting rod, 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.

[0014] According to another aspect of the embodiment of the present application, the diffusion controller further includes:

[0015] A limiting component is used to control the inlet guide vane driving wheel to stop rotating in the first direction when the axial end of the connecting rod is at the second axial position.

[0016] According to another aspect of the embodiment of the present application, the diffusion controller further includes:

[0017] The elastic body is in contact with the connecting rod and provides a restoring force for the connecting rod, wherein the direction of the restoring force is from the other axial end of the connecting rod to the one axial end of the connecting rod.

[0018] According to another aspect of the embodiment of the present application, the diffusion controller further includes:

[0019] a sleeve, which is located inside the housing and connected to the housing, the sleeve being sleeved on the radially outer side of the connecting rod, and the inner wall of the sleeve being formed with a supporting portion for supporting one axial end of the elastic body; and

[0020] The shoulder pressure block is sleeved on the radial outer side of the connecting rod and extends radially. The other axial end of the elastic body abuts against a surface of the shoulder pressure block facing the diffusion ring.

[0021] According to another aspect of the embodiment of the present application, the connecting rod has a first notch portion, which is located on one side of the connecting rod close to the other axial end.

[0022] The first notch has:

[0023] A lower wall surface, which is located on the upper side of the other axial end of the connecting rod and is perpendicular to the axial direction;

[0024] An upper wall surface, which is located on the upper side of the lower wall surface and is perpendicular to the axial direction;

[0025] The side wall surface is located between the upper wall surface and the lower wall surface and is parallel to the axial direction.

[0026] According to another aspect of the embodiment of the present application, the diffusion ring includes:

[0027] a main body portion which is annular and extends along the axial direction; and

[0028] A second notch portion is provided at the axial lower side of the main body portion,

[0029] The second notch portion has:

[0030] A first side surface, which is parallel to the axial direction;

[0031] A second side surface, which is parallel to the axial direction;

[0032] a bottom surface, which is located between the first side surface and the second side surface and is perpendicular to the axial direction,

[0033] When the diffuser ring is connected to the connecting rod,

[0034] The outer circumferential surface or the inner circumferential surface of the main body is arranged opposite to the side wall surface of the first notch,

[0035] The lower wall surface of the first notch portion supports the bottom surface of the second notch portion,

[0036] An axial upper end surface of the main body portion is arranged opposite to the upper wall surface of the first notch portion.

[0037] According to another aspect of the embodiment of the present application, the diffusion ring further includes:

[0038] A raised portion is located at an axially upper end of the main body of the diffusion ring.

[0039] According to another aspect of the embodiment of the present application, the connecting rod further comprises:

[0040] A rolling component is located at one axial end of the connecting rod.

[0041] According to another aspect of the embodiment of the present application, the connecting rod further comprises:

[0042] a shaft located on a side of the connecting rod close to the one axial end, the shaft supporting the rolling member; and

[0043] a third notch portion, which is located on one side of the connecting rod close to the axial end,

[0044] The third notch has:

[0045] A third side surface, which is parallel to the axial direction; and

[0046] a fourth side surface, which is parallel to the axial direction,

[0047] The shaft is supported by the third side surface and the fourth side surface,

[0048] The rolling member is located between the third side surface and the fourth side surface.

[0049] According to another aspect of the embodiment of the present application, the driving guide block further comprises:

[0050] A mounting portion inserted into a mounting groove located on the outer peripheral surface of the inlet guide vane driving wheel; and

[0051] The first mounting hole of the driving guide block penetrates the mounting portion in a radial direction. When the mounting portion 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.

[0052] According to another aspect of the embodiment of the present application, the guide surface is a curved surface.

[0053] According to another aspect of the embodiment of the present application, the guide surface further includes an extension surface.

[0054] The extension surface is perpendicular to the axial direction, and the extension surface is connected to an end of the inclined surface that is closer to the diffusion ring in the axial direction.

[0055] According to another aspect of the embodiment 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 more than 2 driving guide blocks are evenly distributed in the circumferential direction of the inlet guide vane driving wheel.

[0056] According to another aspect of an embodiment of the present application, a compressor is provided, comprising the diffusion controller described in any one of the above aspects of the embodiment.

[0057] One of the beneficial effects of the embodiments of the present application is that the drive guide block is arranged on the outer periphery of the inlet guide vane drive wheel. In the process of driving the inlet guide vane through the inlet guide vane drive wheel, the drive guide block can drive the connecting rod, and the movement of the connecting rod drives the movement of the diffusion ring. Therefore, the inlet guide vane and the diffusion ring can be driven in a linked manner, and there is no need to separately provide a drive device for the diffusion ring and perform separate drive control, thereby reducing hardware costs and control complexity.

[0058] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the terms of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

[0059] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0060] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The elements and features described in one figure or one implementation of the present application embodiment may be combined with the elements and features shown in one or more other figures or implementations. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one implementation.

[0062] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0063] Figure 1 is a perspective schematic diagram of a portion of a compressor having a diffusion controller according to an embodiment of the first aspect;

[0064] Figure 2 is a schematic diagram of a portion of the compressor viewed axially from the inlet guide vane side;

[0065] Figure 3 is along Figure 2 A schematic diagram of an axial cross section observed from the AA direction;

[0066] Figure 4 is another schematic diagram of a portion of the compressor viewed axially from the inlet guide vane side;

[0067] Figure 5 is along Figure 4 A schematic diagram of an axial cross section observed in the BB direction;

[0068] Figure 6 It is a schematic diagram of the relationship between the opening of the inlet guide vane and the opening of the diffuser channel;

[0069] Figure 7 It is a three-dimensional schematic diagram of the connecting rod and the diffuser ring being connected as one;

[0070] Figure 8 is a schematic side view of a portion of a connecting rod;

[0071] Fig. 9 It is a three-dimensional schematic diagram of the diffusion ring;

[0072] Fig.10 It is a three-dimensional schematic diagram of the inlet guide vane drive wheel;

[0073] Fig.11 It is a three-dimensional schematic diagram of the driving guide block;

[0074] Fig.12 It is another three-dimensional schematic diagram of the drive guide block. DETAILED DESCRIPTION

[0075] The foregoing and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the attached claims. Various embodiments of the present application are described below in conjunction with the accompanying drawings. These embodiments are exemplary only and are not limitations of the present application.

[0076] In the embodiments of the present application, the terms "first", "second", "upper", "lower", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or time order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0077] In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0078] In addition, in the following description of the embodiments of the present application, the extension direction of the central axis of the inlet guide vane drive wheel is referred to as the "axial direction"; in the "axial direction", the direction from the diffusion ring to the inlet guide vane (IGV) is referred to as the "upper" direction, and the direction opposite to the "upper" direction is referred to as the "lower" direction; the side away from the central axis along the radial direction is referred to as the "radial outer side", and the side close to the central axis along the radial direction is referred to as the "radial inner side"; the direction around the central axis is referred to as the "circumferential direction".

[0079] It should be noted that the “up” direction and “down” direction of the present application are only for the convenience of describing the present application, and do not indicate the direction of the diffusion controller and compressor of the present application during manufacturing and use.

[0080] Embodiments of the first aspect

[0081] An embodiment of the first aspect of the present application provides a diffusion controller. Figure 1 is a three-dimensional schematic diagram of a portion of a compressor having the diffusion controller, Figure 2This is a schematic diagram of the compressor viewed axially from the inlet guide vane side. Figure 3 is along Figure 2 Schematic diagram of an axial cross section viewed in the AA direction.

[0082] like Figure 1 , Figure 2 and Figure 3 As shown, the compressor 100 includes: a housing 1, an impeller 2 ( Figure 3 Shown), inlet guide vane (Inlet Guide Vane) 3, inlet guide vane drive wheel 4 ( Figure 1 and Figure 2 shown) and the diffusion channel 5 ( Figure 3 shown).

[0083] like Figure 3 As shown, the impeller 2 is installed in the housing 1 , and the diffusion channel 5 is located in the housing 1 .

[0084] like Figure 1 , Figure 2 and Figure 3 As shown, the inlet guide vane 3 is provided at the fluid inlet 101 of the compressor.

[0085] like Figure 1 As shown, the inlet guide vane driving wheel 4 has a central axis C. The inlet guide vane driving wheel 4 extends along 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 vane 3 is the opening degree of the fluid inlet 101.

[0086] In some embodiments, Figure 1 and Figure 2 As shown, the inlet guide vane driving wheel 4 is a gear structure, for example, the outer peripheral surface of the inlet guide vane driving wheel 4 has teeth. However, the present application may not be limited thereto, and the inlet guide vane driving wheel 4 may not have teeth.

[0087] exist Figure 1 In the figure, a driven gear 31 is provided on the axial lower side of the inlet guide vane driving wheel 4, the driven gear 31 is meshed with the teeth of the inlet guide vane driving wheel 4, and the driven gear 31 is connected to the rotating shaft 32; Figure 3 As shown, the rotating shaft 32 extends radially inward and is connected to the inlet guide vane 3; therefore, when the inlet guide vane driving wheel 4 rotates around the central axis C, the driven gear 31 drives the rotating shaft 32 to rotate, and the rotating shaft 32 drives the inlet guide vane 3 to rotate, thereby adjusting the opening degree of the inlet guide vane 3.

[0088] For example, in accordance with Figure 1 When the inlet guide vane driving wheel 4 is rotated in the first direction D1, the opening degree of the inlet guide vane 3 gradually decreases, that is, the inlet guide vane 3 gradually covers the fluid inlet 101; Figure 1When the inlet guide vane driving wheel 4 is rotated in the second direction D2, the opening degree of the inlet guide vane 3 gradually increases, that is, the area of ​​the inlet guide vane 3 covering the fluid inlet 101 gradually decreases, and the second direction D2 is opposite to the first direction D1.

[0089] In addition, the present application is not limited to this, and the inlet guide vane driving wheel 4 may also drive the inlet guide vane 3 through other structures. For example, the driven gear 31 may also be arranged on the axial upper side of the inlet guide vane driving wheel 4; for another example, the outer periphery of the inlet guide vane driving wheel 4 has no teeth, and the inlet guide vane driving wheel 4 may drive the inlet guide vane 31 through a connecting rod mechanism.

[0090] Figure 4 is another schematic diagram of the compressor viewed axially from the inlet guide vane side. Figure 5 is along Figure 4 Schematic diagram of an axial cross section viewed in the BB direction.

[0091] Figure 4 The figure shows the situation when the opening degree of the inlet guide vane 3 is reduced to the minimum, that is, the inlet guide vane 3 covers the fluid inlet 101, so that the opening degree of the fluid inlet 101 is the minimum. For example, the radial length of the inlet guide vane 3 is a certain distance from the center of the fluid inlet 101. When the inlet guide vane 3 is opened to the minimum, there is a small hole 1011 (such as Figure 4 shown). Figure 2 It is shown that the inlet guide vane 3 is opened to a greater extent than Figure 4 In the embodiment of the present invention, the inlet guide vane 3 has an opening degree of 0.0407 W, that is, the inlet guide vane 3 partially covers the fluid inlet 101 .

[0092] like Figure 1 and Figure 2 As shown, the compressor 100 may further include: a driving device 6. Figure 2 As shown, the driving device 6 may include a driving body 61 and a driving gear 62, and the driving gear 62 may be engaged with the inlet guide vane driving wheel 4. Thus, the driving body 61 may generate a driving force to rotate the driving gear 62, and then the driving gear 62 drives the inlet guide vane driving wheel 4 to rotate.

[0093] In addition, the compressor 100 may further include Figure 1 , Figure 2 and Figure 3 Other components are not shown, for example, a motor for driving the impeller 2, etc. For other structures of the compressor 100, reference may be made to the related art.

[0094] like Figure 1 , Figure 2 and Figure 3As shown, the diffusion controller 10 includes: a driving guide block 11, a connecting rod 12 and a diffusion ring 13 ( Figure 3 shown).

[0095] like Figure 1 As shown, the driving guide block 11 is arranged on the outer circumferential surface of the inlet guide vane driving wheel 4, and 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, when observed along the radial direction, the angle between the projection of the inclined surface and the central axis C is not 90 degrees.

[0096] like Figure 1 and Figure 3 As shown, the connecting rod 12 extends in the axial direction. Figure 1 , Figure 2 and Figure 3 As shown, the connecting rod 12 is arranged on the radial outer side of the inlet guide vane driving wheel 4. Figure 2 and Figure 3 As shown, the radial range of one axial end of the connecting rod 12 (for example, the axial upper end of the connecting rod 12) at least partially overlaps the radial range of the guide surface 111. Figure 3 As shown, the diffuser ring 13 is connected to the connecting rod 12 and can move with the connecting rod 12 . For example, the diffuser ring 13 is connected to the other axial end (ie, the axial lower end) of the connecting rod 12 and moves axially with the connecting rod 12 .

[0097] In the present application, when the inlet guide vane driving wheel 4 rotates to the position range where the guide surface 111 contacts the axial end of the connecting rod 12, the guide surface 111 abuts against the axial end of the connecting rod 12, and guides the axial end of the connecting rod 12 to move axially, for example, guides the axial end of the connecting rod 12 to move between the first axial position and the second axial position. When the axial end of the connecting rod 12 is in the first axial position, the diffusion ring 13 opens the diffusion channel 5; when the axial end of the connecting rod 12 is in the second axial position, the diffusion ring 13 blocks the diffusion channel 5 and adjusts the opening of the diffusion channel 5 to a predetermined value, which is, for example, 10%, that is, the ratio of the opening width of the diffusion channel 5 to the maximum opening width of the diffusion channel 5 is 10%.

[0098] According to the embodiments of the first aspect of the present application, the driving guide block is arranged on the outer periphery of the inlet guide vane driving wheel. In the process of driving the inlet guide vane by the inlet guide vane driving wheel, the driving guide block can drive the connecting rod, and the movement of the connecting rod drives the movement of the diffusion ring, thereby adjusting the opening degree of the diffusion flow channel 5. Therefore, the embodiments of the first aspect of the present application can drive the inlet guide vane and the diffusion ring in a linked manner, and there is no need to separately provide a driving device for the diffusion ring and separately perform drive control, thereby reducing hardware costs and control complexity.

[0099] In at least one embodiment, when the inlet guide vane drive wheel 4 rotates to a position range where the guide surface 111 contacts one axial end (e.g., the upper end) of the connecting rod 12, the opening of the diffuser flow channel 5 and the opening of the inlet guide vane 3 may be positively correlated, for example: if the inlet guide vane drive wheel 4 rotates in a first direction D1, the opening degree of the inlet guide vane 3 gradually decreases, and the axial end of the connecting rod 12 moves from the axial first position to the axial second position, so that the diffuser flow channel 5 gradually shrinks; if the inlet guide vane drive wheel 4 rotates in a second direction D2, the opening degree of the inlet guide vane 3 gradually increases, and the axial end of the connecting rod 12 moves from the axial second position to the axial first position, so that the diffuser flow channel 5 gradually expands. In addition, when the inlet guide vane driving wheel 4 rotates to a position range where the guide surface 111 has no contact with one axial end of the connecting rod 12 (for example, the connecting rod 12 is located on the downstream side of the driving guide block 11 along the first direction D1, that is, the driving guide block 11 continues to rotate along the D1 direction to reach the circumferential position of the connecting rod 12), the axial end of the connecting rod 12 remains in the first axial position.

[0100] Figure 6 It is a schematic diagram of the relationship between the opening of the inlet guide vane 3 and the opening of the diffuser channel 5. Figure 6 As shown, in interval 601, the guide surface 111 does not contact the axial end of the connecting rod 12, so the inlet guide vane driving wheel 4 rotates to change the opening of the inlet guide vane 3, while the axial end of the connecting rod 12 remains in the first axial position, and the diffusion ring 13 does not block the diffusion channel 5, so that the opening of the diffusion channel 5 remains at the maximum (i.e., 100%). When the opening of the inlet guide vane 3 becomes the value shown in 602 (e.g., 47%), the guide surface 111 begins to contact the axial end of the connecting rod 12. In interval 603, the guide surface 111 contacts the axial end of the connecting rod 12, and the inlet guide vane driving wheel 4 rotates to adjust the opening of the inlet guide vane 3 and the opening of the diffusion channel 5 in a linked manner. For example, the inlet guide vane driving wheel 4 rotates to change the opening of the inlet guide vane 3 and the opening of the diffusion channel 5 in a positive correlation, that is, the shape of the curve 600 in interval 603 is determined by the shape of the guide surface 111. As shown in 604, when the inlet guide vane driving wheel 4 rotates to a position where the opening of the inlet guide vane 3 is 0 (i.e., the inlet guide vane 3 is closed), the guide surface 111 pushes one axial end of the connecting rod 12 to an axial second position, thereby adjusting the opening of the diffuser flow channel 5 to a minimum value, such as 10%.

[0101] Figure 2 and Figure 3 Can correspond to Figure 6 The situation shown in 602 is that the guide surface 111 begins to contact with one axial end of the connecting rod 12 (corresponding to the situation where the inlet guide vane drive wheel 4 moves along the first direction D1) or begins to lose contact (corresponding to the situation where the inlet guide vane drive wheel 4 moves along the second direction D2). Figure 3 The diffusion ring 13 in the diffuser does not block the diffuser flow channel 5.

[0102] Figure 4 and Figure 5 Can correspond to Figure 6 The situation shown in 604 is that the guide surface 111 pushes one axial end of the connecting rod 12 to the second axial position. Figure 5 The diffusion ring 13 in the diffuser 10 is lowered to the lowest position in the axial direction, thereby blocking the diffusion channel 5 and adjusting the opening of the diffusion channel 5 to the minimum value.

[0103] like Figure 2 As shown, the diffusion controller 10 also includes: a limiting component 14. When one axial end of the connecting rod 12 is in the second axial position, the limiting component 14 can be controlled so that the inlet guide vane driving wheel 4 stops rotating in the first direction D1, thereby, the limiting component 14 can limit the limit position of the inlet guide vane driving wheel 4 corresponding to the minimum opening of the inlet guide vane 3, that is, when the opening of the inlet guide vane 3 reaches the minimum value, the limit position of the inlet guide vane driving wheel 4 rotating in the first direction D1; in addition, the limiting component 14 can also prevent the inlet guide vane driving wheel 4 from excessively rotating in the first direction D1, thereby causing the upper end of the connecting rod 2 to slide out of the guide surface 111 (for example, the upper end of the connecting rod 2 slides out as shown in FIG. 1 ). Fig.12 The extending surface 1112 of the guide surface 111 shown in the figure is formed by the connecting rod 2, thereby preventing the upper end of the connecting rod 2 from being out of contact with the guide surface 111. The limiting component 14 can be a micro switch, which indirectly controls the inlet guide vane driving wheel 4 to stop rotating by controlling the motor of the driving mechanism; or, the limiting component 14 can have a mechanical limiting structure, which can realize direct control of the inlet guide vane driving wheel 4.

[0104] In addition, if Figure 2 As shown, the diffusion controller 10 also includes: an additional limiting component 141. When the opening degree of the inlet guide vane 3 is the maximum, the additional limiting component 141 can be controlled so that the inlet guide vane drive wheel 4 stops rotating in the second direction D2. Thus, the limiting component 14 can limit the extreme position of the rotation of the inlet guide vane drive wheel 4 corresponding to the maximum opening of the inlet guide vane 3, that is, when the opening of the inlet guide vane 3 reaches the maximum value, the extreme position of the rotation of the inlet guide vane drive wheel 4 along the second direction D2. The additional limiting component 141 can be a micro switch, which indirectly controls the inlet guide vane drive wheel 4 to stop rotating by controlling the motor of the drive mechanism; or, the additional limiting component 141 can have a mechanical limiting structure, which can realize direct control of the inlet guide vane drive wheel 4.

[0105] In addition, if Figure 2As shown, the diffusion controller 10 may further include: a trigger component 142 disposed on the inlet guide vane driving wheel 4. The trigger component 142 may contact the limiting component 14 and / or the additional limiting component 141, thereby triggering the limiting component 14 and / or the additional limiting component 141 to produce a limiting effect, that is, to stop the inlet guide vane driving wheel 4 from rotating in the first direction D1, or to stop the inlet guide vane driving wheel 4 from rotating in the second direction D2.

[0106] like Figure 1 and Figure 3 As shown, the diffusion controller 10 further includes an elastic body 15. The elastic body 15 contacts the connecting rod 12 and provides a restoring force for the connecting rod 12. The direction of the restoring force is from the other axial end (e.g., the lower end) of the connecting rod 12 to the axial end (e.g., the upper end) of the connecting rod 12, that is, the direction of the restoring force is axially upward. When the guide surface 111 moves to a range where it does not contact the axial end of the connecting rod 12 (e.g., Figure 6 The restoring force and the limiting groove 51 ( Figure 3 ) can maintain the position of the connecting rod 12 so that one axial end of the connecting rod 12 is located at the first axial position, thereby maintaining the maximum opening of the diffusion flow channel 5. For example, the elastic body 15 can be a spring.

[0107] In addition, the elastic body 15 (for example, a spring) in a free state will cause excessive vibration of the connecting rod 12, which needs to be avoided as much as possible during use, so the limiting groove 51 will limit the excessive upward movement of the connecting rod 12 to avoid excessive vibration of the connecting rod 12. The limiting groove 51 can be a part of the housing 1.

[0108] like Figure 1 and Figure 3 As shown, the diffusion controller 10 further includes: a sleeve 16. The sleeve 16 is located inside the housing 1 and connected to the housing 1. The sleeve 16 is sleeved on the radially outer side of the connecting rod 12. Figure 3 As shown, a support portion 161 for supporting one axial end of the elastic body 15 (ie, the axial lower end of the elastic body 15 ) is formed on the inner wall of the sleeve 16 .

[0109] like Figure 1 and Figure 3As shown, the diffusion controller 10 also includes: a shoulder pressure block 17 and a locking component 18. The shoulder pressure block 17 is sleeved on the radial outer side of the connecting rod 12 and extends radially. The other axial end of the elastomer 15 abuts against the side of the shoulder pressure block 17 facing the diffusion ring 13. For example, the side of the shoulder pressure block 17 facing the diffusion ring 13 may be formed with a groove to accommodate the other axial end of the elastomer 15 (that is, the axial upper end of the elastomer 15). The locking component 18 is connected to the connecting rod 12 and abuts against the side of the shoulder pressure block 17 facing away from the diffusion ring 13. For example, the locking component 18 may be a locking nut with an internal thread, and the outer periphery of the connecting rod 12 may be provided with an external thread, thereby, the locking component 18 may be fastened to the connecting rod 12. In addition, the present application may not be limited to this. For example, the shoulder pressure block 17 may be directly fixed to the connecting rod 12 or the two may be formed integrally, thereby, there is no need to provide a locking component 18.

[0110] Figure 7 It is a three-dimensional schematic diagram showing that the connecting rod 12 and the diffuser ring 13 are connected as one body. Figure 7 1 , the connecting rod 12 , the diffuser ring 13 , the elastic body 15 , the shoulder pressure piece 17 and the locking component 18 are shown.

[0111] Figure 8 1 is a side view of a portion of the connecting rod 12. Figure 8 As shown, the connecting rod 12 has a first notch 121, which is located on a side of the connecting rod 12 close to the other axial end (e.g., the lower end). The first notch 121 has: a lower wall 1211, which is located on the upper side of the other axial end of the connecting rod 12 and is perpendicular to the axial direction; an upper wall 1212, which is located on the upper side of the lower wall 1211 and is perpendicular to the axial direction; and a side wall 1213, which is located between the upper wall 1212 and the lower wall 1211 and is parallel to the axial direction. In addition, as shown in FIG. Figure 7 and Figure 8 As shown, the connecting rod 12 may further have a first mounting hole 1214 , and the penetration direction of the first mounting hole 1214 may be perpendicular to the side wall surface 1213 .

[0112] Fig. 9 FIG. 1 is a three-dimensional schematic diagram of the diffusion ring 13. Fig. 9 As shown, the diffusion ring 13 includes: a main body portion 131 which is annular and extends along the axial direction; and a second notch portion 132 which is disposed at the axial lower side of the main body portion 131 .

[0113] like Fig. 9As shown, the second notch portion 132 has: a first side surface 1321, which is parallel to the axial direction; a second side surface 1322, which is parallel to the axial direction; and a bottom surface 1323, which is located between the first side surface 1321 and the second side surface 1322 and is perpendicular to the axial direction. When the diffusion ring 13 is connected to the connecting rod 12, the outer peripheral surface of the main body 131 is arranged opposite to the side wall surface 1213 of the first notch portion 121, the lower wall surface 1211 of the first notch portion 121 supports the bottom surface 1323 of the second notch portion 132, and the axial upper end 131a of the main body 131 is arranged opposite to the upper wall surface 1212 of the first notch portion 121.

[0114] In addition, the diffuser ring 13 may further include: a second mounting hole 133. The second mounting hole 133 radially penetrates the main body 131 and is located axially above the second notch 132. When the diffuser ring 13 is connected 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 firmly connect the diffuser ring 13 and the connecting rod 12.

[0115] like Fig. 9 As shown, the diffusion ring 13 may further include: a protrusion 134. The protrusion 134 is located at the axial upper end 131a of the diffusion ring body 131. For example, the protrusion 134 may extend axially upward from the axial upper end 131a of the diffusion ring body 131. When the connecting rod 12 drives the diffusion ring 13 to move axially upward, the protrusion 134 may move with the connecting rod 12. Figure 5 The protrusion 134 contacts the limiting groove 51 as shown (for example, the protrusion 134 extends into the limiting groove 51 and abuts the bottom of the limiting groove 51 in the axial direction), thereby limiting the excessive upward movement of the connecting rod 12 and the diffuser ring, and avoiding excessive vibration of the connecting rod 12. Therefore, the protrusion 134 contacts the limiting groove 51, rather than the entire circumference of the upper end 131a of the diffuser ring 13 contacting the limiting groove 51, which can reduce the material of the diffuser ring 13 and reduce the cost. In addition, the number of protrusions 134 can be more than two, for example, Fig. 9 Three protrusions 134 are shown. The two or more protrusions 134 may be evenly distributed in the circumferential direction of the diffusion ring body 131 .

[0116] like Figure 7 As shown, the connecting rod 12 may also have a rolling component 122. The rolling component 122 is located at the one end (i.e., the upper end) of the connecting rod 12. Thus, at the upper end of the connecting rod 12, the rolling component 122 contacts the guide surface 111, which can reduce friction and facilitate driving the connecting rod 12.

[0117] like Figure 7As shown, the rolling component 122 can be a roller or a bearing, etc., and the connecting rod 12 can also have: a shaft 123. The shaft 123 is located on one side of the connecting rod 12 close to one axial end. The shaft 123 can support the rolling component 122. For example, when the rolling component 122 is a roller, the shaft 123 can support the roller, and when the rolling component 122 is a bearing, the shaft 123 can be the central axis of the bearing.

[0118] like Figure 8 As shown, the connecting rod 12 further has: a third notch portion 124, which is located at one side of the connecting rod close to one axial end. The third notch portion 124 has: a third side surface 1241, which is parallel to the axial direction; and a fourth side surface 1242, which is parallel to the axial direction. Figure 7 The shaft 123 may be supported on the third side surface 1241 and the fourth side surface 1242, and, Figure 7 The rolling member 122 may be located between the third side surface 1241 and the fourth side surface 1242 .

[0119] Fig.10 Schematic diagram of the inlet guide vane drive wheel 4. Fig.10 As shown, the outer circumference of the inlet guide vane driving wheel 4 is provided with a mounting groove 41. The mounting groove 41 may be rectangular when viewed radially. The mounting groove 41 has a second mounting hole 42 of the driving guide block that radially passes through the inlet guide vane driving wheel 4.

[0120] Fig.11 It is a three-dimensional schematic diagram of the drive guide block. Fig.12 is another three-dimensional schematic diagram of the drive guide block. Fig.11 and Fig.12 As shown, the driving guide block 11 also has: a mounting portion 112, which is inserted into Fig.10 The mounting groove 41 of the outer peripheral surface of the inlet guide vane drive wheel 4; and the first mounting hole 113 of the drive guide block, which penetrates the mounting portion 113 in the radial direction, and is inserted into the mounting portion 113 Fig.11 In the case of the mounting groove 41 shown in FIG. 1 , the first mounting hole 113 of the drive guide block is connected to the Fig.11 The second drive guide block mounting hole 42 in the mounting groove 41 is shown to be connected. A fixing member such as a screw can be inserted into the first drive guide block mounting hole 113 and the second drive guide block mounting hole 42, thereby firmly connecting the drive guide block 11 with the inlet guide vane drive wheel 4.

[0121] like Fig.11As shown, in at least one embodiment, the inclined surface portion 1111 of the guide surface 111 can be a curved surface. For example, the shape of the inclined surface can be determined based on the composite motion of the axial displacement of the axial end of the connecting rod 12 and the circumferential motion of the driving guide block 11, thereby ensuring that the inclined surface is always in line contact or point contact with the axial end of the connecting rod 12, thereby reducing the wear of the axial end of the connecting rod 12. In addition, the shape of the inclined surface portion 1111 can ensure that the relationship between the opening of the inlet guide vane 3 and the opening of the diffuser flow channel 5 conforms to a predetermined curve (for example, Figure 6 Furthermore, in the present application, the relationship between the opening of the inlet guide vane 3 and the opening of the diffuser flow channel 5 can be adjusted by simply adjusting the shape of the inclined surface portion 1111 of the guide surface 111 to adapt to different compressors or different applications of the same compressor.

[0122] like Fig.12 As shown, the guide surface 111 may include an extension surface 1112 in addition to the inclined surface 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 that is closer to the diffusion ring 13 in the axial direction. Figure 2 When the limiting component 14 shown fails to stop the rotation of the inlet guide vane driving wheel 4 in the first direction D1, the extension surface 1112 can keep one axial end of the connecting rod 12 in the second axial position. If the connecting rod 12 is out of contact with the guide surface 111, the connecting rod 12 will rise under the action of the spring force and it will be difficult to return to the state of contact with the guide surface 111. Therefore, the extension surface 1112 can leave a safety margin for maintaining the contact between the connecting rod 12 and the guide surface 111.

[0123] 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 more than 2, and the more than 2 driving guide blocks 11 and the connecting rods 12 are evenly distributed in the circumferential direction of the inlet guide vane driving wheel 4. Thus, the stability of the diffuser ring 13 can be maintained.

[0124] According to the embodiments of the first aspect of the present application, the driving guide block is arranged on the outer periphery of the inlet guide vane driving wheel. In the process of driving the inlet guide vane by the inlet guide vane driving wheel, the driving guide block can drive the connecting rod, and the movement of the connecting rod drives the movement of the diffusion ring, thereby adjusting the opening degree of the diffusion flow channel 5. Therefore, the embodiments of the first aspect of the present application can drive the inlet guide vane and the diffusion ring in a linked manner, and there is no need to separately provide a driving device for the diffusion ring and separately perform drive control, thereby reducing hardware costs and control complexity.

[0125] Embodiments of the second aspect

[0126] An embodiment of the second aspect of the present application provides a compressor, which includes the diffusion controller 10 described in the embodiment of the first aspect.

[0127] In the embodiment of the first aspect, the structure of the diffusion controller 10 has been described in detail, and its content is incorporated here, and the description is omitted here.

[0128] The compressor of the embodiment of the second aspect of the present application is, for example, a centrifugal compressor, which can be used, for example, in a refrigeration unit of a heating, ventilation and air conditioning (HAVC) system or a refrigeration system. Figure 1 A compressor 100 is shown.

[0129] According to the embodiment of the second aspect of the present application, in the compressor, the driving guide block is arranged on the outer periphery of the inlet guide vane driving wheel. In the process of driving the inlet guide vane by the inlet guide vane driving wheel, the driving guide block can drive the connecting rod, and the movement of the connecting rod drives the movement of the diffusion ring, thereby adjusting the opening degree of the diffusion flow channel. Therefore, the embodiment of the second aspect of the present application can drive the inlet guide vane and the diffusion ring in a linked manner, and there is no need to separately provide a driving device for the diffusion ring and separately perform drive control, thereby reducing hardware cost and control complexity.

[0130] The present application is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.

Claims

1. A diffusion controller, the diffusion controller is used for a compressor, the compressor is used to compress a fluid, the compressor comprises a casing, an impeller, an inlet guide vane, an inlet guide vane driving wheel and a diffusion channel, the impeller is installed in the casing, the diffusion channel is located in the casing, the inlet guide vane is arranged at the 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 the opening degree of the inlet guide vane, It is characterized in that The diffusion controller comprises: A driving guide block, which is arranged on the outer circumferential surface of the inlet guide vane driving wheel, the driving guide block has a guide surface, and the guide surface includes an inclined surface inclined in the circumferential direction; a connecting rod disposed radially outside the inlet guide vane drive wheel, wherein the radial range of one axial end of the connecting rod at least partially overlaps the radial range of the guide surface, and when the inlet guide vane drive wheel rotates to a position range where the guide surface contacts the one axial end of the connecting rod, the guide surface abuts against the one axial end of the connecting rod, so that the one axial end of the connecting rod moves between a first axial position and a second axial position; and a diffuser ring connected to the connecting rod and moving with the connecting rod, in, When the axial end of the connecting rod is at the first axial position, the diffusion ring opens the diffusion channel. When the axial end of the connecting rod is at the second axial position, the diffusion ring adjusts the opening of the diffusion channel to a predetermined value. When the inlet guide vane driving wheel rotates to a position where the guide surface contacts the axial end of the connecting rod, The inlet guide vane driving 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, The diffusion controller also includes: The elastic body is in contact with the connecting rod and provides a restoring force for the connecting rod, wherein the direction of the restoring force is from the other axial end of the connecting rod to the one axial end of the connecting rod.

2. The diffusion controller according to claim 1, characterized in that The diffusion controller also includes: A limiting component is used to control the inlet guide vane driving wheel to stop rotating in the first direction when the axial end of the connecting rod is at the second axial position.

3. The diffusion controller according to claim 1, characterized in that The diffusion controller also includes: a sleeve, which is located inside the housing and connected to the housing, the sleeve being sleeved on the radially outer side of the connecting rod, and the inner wall of the sleeve being formed with a supporting portion for supporting one axial end of the elastic body; and The shoulder pressure block is sleeved on the radial outer side of the connecting rod and extends radially. The other axial end of the elastic body abuts against a surface of the shoulder pressure block facing the diffusion ring.

4. The diffusion controller according to claim 1, characterized in that: The connecting rod has a first notch portion, which is located on one side of the connecting rod close to the other axial end. The first notch has: A lower wall surface, which is located on the upper side of the other axial end of the connecting rod and is perpendicular to the axial direction; An upper wall surface, which is located on the upper side of the lower wall surface and is perpendicular to the axial direction; The side wall surface is located between the upper wall surface and the lower wall surface and is parallel to the axial direction.

5. The diffusion controller according to claim 4, characterized in that: The diffusion ring comprises: a main body portion which is annular and extends along the axial direction; and A second notch portion is provided at the axial lower side of the main body portion, The second notch portion has: A first side surface, which is parallel to the axial direction; A second side surface, which is parallel to the axial direction; a bottom surface, which is located between the first side surface and the second side surface and is perpendicular to the axial direction, When the diffuser ring is connected to the connecting rod, The outer circumferential surface or the inner circumferential surface of the main body is arranged opposite to the side wall surface of the first notch, The lower wall surface of the first notch portion supports the bottom surface of the second notch portion, An axial upper end surface of the main body portion is arranged opposite to the upper wall surface of the first notch portion.

6. The diffusion controller according to claim 5, characterized in that The diffusion ring further comprises: A raised portion is located at an axially upper end of the main body of the diffusion ring.

7. The diffusion controller according to claim 1, characterized in that: The connecting rod also has: A rolling component is located at one axial end of the connecting rod.

8. The diffusion controller according to claim 7, characterized in that: The connecting rod also has: a shaft located on a side of the connecting rod close to the one axial end, the shaft supporting the rolling member; and a third notch portion, which is located on one side of the connecting rod close to the axial end, The third notch has: A third side surface, which is parallel to the axial direction; as well as a fourth side surface, which is parallel to the axial direction, The shaft is supported by the third side surface and the fourth side surface, The rolling member is located between the third side surface and the fourth side surface.

9. The diffusion controller according to claim 1, characterized in that: The driving guide block also has: A mounting portion inserted into a mounting groove located on the outer peripheral surface of the inlet guide vane driving wheel; and The first mounting hole of the driving guide block penetrates the mounting portion in a radial direction. When the mounting portion 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.

10. The diffusion controller according to claim 1, characterized in that: The guide surface is a curved surface.

11. The diffusion controller according to claim 1, characterized in that: The guide surface also includes an extension surface, The extension surface is perpendicular to the axial direction, and the extension surface is connected to an end of the inclined surface that is closer to the diffusion ring in the axial direction.

12. The diffusion controller according to claim 1, characterized in that: The number of the driving guide blocks is more than 2, and the number of the driving guide blocks is the same as the number of the connecting rods. The two or more driving guide blocks are evenly distributed in the circumferential direction of the inlet guide vane driving wheel.

13. A compressor comprising the diffusion controller according to any one of claims 1 to 12.

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