CN217462665U - Centrifugal compressor and water chilling unit - Google Patents

Abstract

The utility model provides a centrifugal compressor and cooling water set can solve the complicated, with high costs problem of air inlet guide vane adjustment mechanism structure among the prior art. The centrifugal compressor comprises an air inlet guide vane adjusting mechanism, wherein the air inlet guide vane adjusting mechanism comprises a base, guide vanes, linkage connecting pieces, a driving guide vane connecting piece and a plurality of driven guide vane connecting pieces, a connecting structure used for being connected with an actuator is formed on each driving guide vane, two ends of each driving guide vane connecting piece are hinged with a first linkage connecting piece and a second linkage connecting piece respectively, and two ends of each driven guide vane connecting piece are hinged with the first linkage connecting piece and the second linkage connecting piece respectively. The utility model discloses simple structure, the operation is stable, the dependable performance, low in production cost, easy to assemble, each structural component easily processes, accords with the existing market demand more, can effectively avoid the card that leads to because of the inlet guide vane adjustment mechanism structure is complicated among the prior art to die simultaneously, the problem that the operation lags behind.

Description

Centrifugal compressor and water chilling unit

Technical Field

The utility model relates to a compressor technical field, concretely relates to centrifugal compressor and have this centrifugal compressor's cooling water set.

Background

The centrifugal compressor is a vane rotary compressor (i.e. turbine compressor), and is a power source of centrifugal water chilling unit, and its main components include: the device comprises an impeller, an air inlet guide vane adjusting mechanism, a volute, a radial bearing, a thrust bearing, an oil pump, a motor, an oil cooler, an oil filter and a lubricating system.

The working principle of the centrifugal compressor is as follows: the low-speed shaft of the motor starts to rotate under the action of the motor, the high-speed shaft is driven to rotate at a high speed through gear engagement and a proper transmission ratio, the impeller is connected with the high-speed shaft and is driven to rotate at a high speed through the high-speed shaft to compress refrigerant vapor, the flow and the gas inlet angle of the refrigerant vapor are adjusted through the gas inlet guide vane adjusting mechanism in front of the impeller, the refrigerant vapor is thrown into a diffuser of the volute under the action of centrifugal force of high-speed rotation after entering the impeller, the refrigerant vapor is continuously sucked and thrown out along with continuous rotation of the impeller, and therefore continuous flow of gas is maintained, and flowing circulation of the refrigerant vapor is completed. According to the change of the load of the compressor, the air inlet guide vane adjusting mechanism adjusts the opening degree of the inlet guide vane to control the flow rate and the inlet angle of the refrigerant vapor, so that the stable operation of the compressor is ensured.

Centrifugal compressor's air inlet guide vane adjustment mechanism adopts the executor to drive the propelling ring rotation mostly in the existing market to drive each stator and rotate, realize the angle modulation of stator, its structure is more complicated, and manufacturing cost is higher, and complicated structural design can lead to its in operation in-process to appear the phenomenon such as structure card is dead, control hysteresis, and the structural wear in service can reduce its control accuracy, thereby influences the operating efficiency of compressor.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may contain prior art that does not constitute known technology to those of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a centrifugal compressor and cooling water set can solve the complicated, with high costs problem of stator adjustment mechanism structure that admits air among the prior art.

In order to solve the technical problem, the utility model adopts the following technical scheme to realize:

in some embodiments of the present application, a centrifugal compressor is provided, comprising a suction vane adjustment mechanism, the suction vane adjustment mechanism comprising:

a base;

the guide vane is rotatably arranged on the base and comprises a driving guide vane and a plurality of driven guide vanes, and a connecting structure used for being connected with an actuator is formed on the driving guide vane;

the linkage connecting piece is rotatably arranged on the periphery of the base and comprises a first linkage connecting piece and a second linkage connecting piece;

the driving guide vane connecting piece is connected with the driving guide vane and synchronously rotates with the driving guide vane, and two ends of the driving guide vane connecting piece are respectively hinged with the first linkage connecting piece and the second linkage connecting piece;

a plurality of driven stator connecting pieces, its with driven stator one-to-one connect and with driven stator synchronous revolution, the both ends of driven stator connecting piece respectively with first linkage connecting piece reaches the second linkage connecting piece is articulated.

In some embodiments of the present application, the first linkage connection piece and the second linkage connection piece are both circular rings, and the coaxial sleeve is arranged on the periphery of the base, and the first linkage connection piece and the second linkage connection piece are arranged along the axial interval of the base.

In some embodiments of the present application, the initiative stator connecting piece with driven stator connecting piece all is the linearity, the initiative stator connecting piece with its central point position with the initiative stator is connected, driven stator connecting piece with its central point position with driven stator is connected, the initiative stator connecting piece with driven stator connecting piece is followed the circumference of base is laid on the outer peripheral face of base.

In some embodiments of the present application, the first linkage connecting piece and the second linkage connecting piece are both arc-shaped, the number of the first linkage connecting pieces is plural, the first linkage connecting pieces are arranged at intervals on the same circumference, the number of the second linkage connecting pieces is plural, and the second linkage connecting pieces are arranged at intervals on the same circumference.

In some embodiments of the present application, a circumference of the first linkage connecting part and a circumference of the second linkage connecting part are coaxial, and the first linkage connecting part and the second linkage connecting part are axially spaced along the base.

In some embodiments of the present application, the initiative stator connecting piece with driven stator connecting piece all is the linearity, the initiative stator connecting piece with its central point position with the initiative stator is connected, driven stator connecting piece with its central point position with driven stator is connected, the initiative stator connecting piece with driven stator connecting piece is followed the circumference of base is laid on the outer peripheral face of base.

In some embodiments of the present application, two ends of the driving guide vane connecting piece are respectively hinged to the first linkage connecting piece and the second linkage connecting piece through ball bearings; and two ends of the driven guide vane connecting piece are respectively hinged with the first linkage connecting piece and the second linkage connecting piece through ball bearings.

In some embodiments of the present application, the driving vane includes a first blade portion, a first spindle portion and a first connecting portion, the first blade portion and the first connecting portion are respectively connected to two ends of the first spindle portion, a cross section of the first connecting portion is a polygon, a polygonal first connecting hole adapted to the first connecting portion is correspondingly disposed on the driving vane connecting member, and the first connecting portion is inserted into the first connecting hole to connect the driving vane connecting member and the driving vane;

driven stator includes second blade portion, second pivot portion and second connecting portion, the second blade portion with second connecting portion are located respectively on the both ends of second pivot portion, the cross section of second connecting portion is the polygon, correspond on the driven stator connecting piece be equipped with the polygonal second connecting hole of second connecting portion looks adaptation, the second connecting portion are inserted and are established realize in the second connecting hole driven stator connecting piece with driven stator's connection.

In some embodiments of the present application, a first limiting portion is formed at a free end of the first connecting portion, and the driving vane connecting piece is clamped between the first rotating shaft portion and the first limiting portion; the free end of second connecting portion is formed with the spacing portion of second, driven stator connecting piece presss from both sides and establishes second pivot portion with between the spacing portion of second.

In some embodiments, the present application further provides a water chilling unit, including a centrifugal compressor, wherein the centrifugal compressor is the above-mentioned centrifugal compressor.

Compared with the prior art, the utility model discloses an advantage is with positive effect:

the utility model discloses centrifugal compressor, its inlet guide vane adjustment mechanism include the base, the stator, the linkage connecting piece, initiative stator connecting piece and driven stator connecting piece, be formed with the connection structure who is used for being connected with the executor on the initiative stator, when adjusting the stator aperture, drive the initiative stator through the executor and rotate, and then through initiative stator connecting piece, the linkage connecting piece, driven stator connecting piece drive driven stator and rotate to adjustable stator aperture, the utility model discloses simple structure, the operation is stable, the dependable performance, low in production cost, easy to assemble, each structural component easily processes, accords with present market demand more, can effectively avoid the card that leads to because of inlet guide vane adjustment mechanism structure is complicated among the prior art to die, the problem that the operation lags simultaneously.

Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a perspective view of an inlet guide vane adjustment mechanism for a centrifugal compressor according to a first embodiment of the present application;

FIG. 2 is a top view of the inlet guide vane adjustment mechanism of FIG. 1;

FIG. 3 is a front view of the inlet guide vane adjustment mechanism of FIG. 1;

FIG. 4 is an exploded view of a centrifugal compressor inlet guide vane adjustment mechanism with a junction of a drive guide vane and a drive guide vane coupler according to an embodiment of the present application;

FIG. 5 is a perspective view of the inlet guide vane adjustment mechanism active guide vanes of a centrifugal compressor according to a first embodiment of the present application;

FIG. 6 is a perspective view of a driven vane of an inlet vane adjustment mechanism of a centrifugal compressor according to a first embodiment of the present application;

FIG. 7 is a perspective view of an inlet guide vane adjustment mechanism active guide vane attachment for a centrifugal compressor in accordance with an embodiment of the present application;

FIG. 8 is a cross-sectional view of an inlet guide vane adjustment mechanism active guide vane attachment of a centrifugal compressor according to a first embodiment of the present application;

FIG. 9 is a perspective view of a inlet guide vane adjustment mechanism of a centrifugal compressor according to a second embodiment of the present application;

FIG. 10 is a top view of the inlet guide vane adjustment mechanism of FIG. 9;

FIG. 11 is a front view of the inlet guide vane adjustment mechanism of FIG. 9;

reference numerals are as follows:

10-a base; 11-a central flow channel; 12-radial mounting holes; 20-active guide vanes; 21-a linking structure; 22-a first blade portion; 23-a first shaft portion; 24-a first connection; 25-a first limit portion; 30-driven guide vanes; 31-a second blade portion; 32-a second shaft portion; 33-a second connecting portion; 34-a second limiting part; 40-a first linkage connection; 50-a second linkage connection; 60-active guide vane connection; 61-a first connection aperture; 62-spherical groove; 70-driven vane connections; 80-ball bearings; 90-nut.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

The low-temperature and low-pressure refrigerant enters the compressor, the compressor compresses the refrigerant gas in a high-temperature and high-pressure state, and the compressed refrigerant gas is discharged. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

For a central air-conditioning system, most of large central air-conditioning water coolers currently adopt centrifugal water chiller units, and the centrifugal water chiller units mainly comprise a centrifugal compressor, a main motor, a condenser (a water-cooling shell-tube type), an evaporator (a full-liquid horizontal shell-tube type), a throttling device and the like. The centrifugal compressor is a vane rotary compressor (i.e., a turbine compressor). The centrifugal compressor is a vane rotary compressor (i.e. a turbine compressor) and is a power source of a centrifugal water chilling unit, and the main parts comprise an impeller, an air inlet guide vane adjusting mechanism, a volute, a radial bearing, a thrust bearing, an oil pump, a motor, an oil cooler, an oil filter and a lubricating system.

The working principle of the centrifugal compressor is as follows: the low-speed shaft of the motor starts to rotate under the action of the motor, the high-speed shaft is driven to rotate at a high speed through gear engagement and a proper transmission ratio, the impeller is connected with the high-speed shaft and is driven to rotate at a high speed through the high-speed shaft to compress refrigerant vapor, the flow and the gas inlet angle of the refrigerant vapor are adjusted through the gas inlet guide vane adjusting mechanism in front of the impeller, the refrigerant vapor is thrown into a diffuser of the volute under the action of centrifugal force of high-speed rotation after entering the impeller, the refrigerant vapor is continuously sucked and thrown out along with continuous rotation of the impeller, and therefore continuous flow of gas is maintained, and flowing circulation of the refrigerant vapor is completed. According to the change of the load of the compressor, the air inlet guide vane adjusting mechanism adjusts the opening degree of the inlet guide vane to control the flow rate and the inlet angle of the refrigerant vapor, so that the stable operation of the compressor is ensured.

Example one

Referring to fig. 1 to 8, the inlet guide vane adjusting mechanism of the centrifugal compressor of the present embodiment includes a base 10, guide vanes, a linkage connection piece, a driving guide vane connection piece 60, and a plurality of driven guide vane connection pieces 70.

The base 10 is in a cylindrical structure and has a central flow channel 11, the base 10 is fixedly connected to the compressor housing by a plurality of screws on one end surface thereof, a plurality of radial mounting holes 12 are circumferentially distributed on the base 10, and the radial mounting holes 12 radially penetrate through the base 10.

The guide vanes are rotatably arranged on the base 10, the rotating axis of the guide vanes is perpendicular to the axis of the base 10, the number of the guide vanes is multiple, one of the guide vanes is a driving guide vane 20, the rest guide vanes are driven guide vanes 30, blade portions of the driving guide vane 20 and the driven guide vane 30 are located in a central flow channel 11 of the base 10, a connecting structure 21 used for being connected with an actuator is formed on the driving guide vane 20 so as to be connected with an external actuator and driven to rotate by the actuator, the rotating directions and rotating angles of the driven guide vane 30 and the driving guide vane 20 are the same, and therefore guide vane opening adjustment is achieved, namely gas flow adjustment through the central flow channel 11 of the base 10 is achieved.

The linkage connection member is rotatably provided at the periphery of the base 10 and includes a first linkage connection member 40 and a second linkage connection member 50. In this embodiment, the first linkage connector 40 and the second linkage connector 50 are both circular rings, and are coaxially sleeved on the periphery of the base 10, and the first linkage connector 40 and the second linkage connector 50 are arranged at intervals along the axial direction of the base 10, that is, the rotation axis of the first linkage connector 40 and the second linkage connector 50 is the axis of the base 10. The annular first linkage connecting piece 40 and the annular second linkage connecting piece 50 are adopted, the integrity is good, the rotation synchronism of each guide vane can be further improved, and the linkage connecting pieces are simultaneously connected with the driving guide vane connecting piece 60 and each driven guide vane connecting piece 70, so that the linkage connecting pieces are uniformly stressed in the operation process and stably operate.

The driving guide vane connecting piece 60 is connected with the driving guide vane 20 and rotates synchronously with the driving guide vane 20, that is, when the driving guide vane 20 is driven by an external actuator to rotate, the driving guide vane connecting piece 60 is driven to rotate synchronously, two ends of the driving guide vane connecting piece 60 are respectively hinged with the first linkage connecting piece 40 and the second linkage connecting piece 50, that is, one end of the driving guide vane connecting piece 60 is hinged with the first linkage connecting piece 40, and the other end is hinged with the second linkage connecting piece 50. In the present embodiment, the number of the driving guide vanes 20 is one, and one driving guide vane connecting piece 60 is provided.

The number of the driven guide vane connectors 70 is equal to that of the driven guide vanes 30, the driven guide vane connectors 70 are connected with the driven guide vanes 30 in a one-to-one correspondence manner and rotate synchronously with the driven guide vanes 30, and two ends of each driven guide vane connector 70 are respectively hinged with the first linkage connector 40 and the second linkage connector 50, namely one end of each driven guide vane connector 70 is hinged with the first linkage connector 40, and the other end of each driven guide vane connector 70 is hinged with the second linkage connector 50.

When the driving guide vane 20 is driven by the actuator to rotate, the driving guide vane connecting piece 60 is driven to synchronously rotate, the driving guide vane connecting piece 60 drives the first linkage connecting piece 40 and the second linkage connecting piece 50 to rotate, and further drives the driven guide vane connecting piece 70 to rotate, and the driven guide vane connecting piece 70 rotates to drive the driven guide vane 30 to rotate, so that the synchronous rotation of all guide vanes is realized, and the adjustment of the opening degree of the guide vanes is realized.

Compared with the prior art that the actuator is adopted to drive the pushing ring to rotate so as to drive each guide vane to rotate, the centrifugal compressor provided by the embodiment has the advantages of simple structure, stable operation, reliable performance, low production cost, convenience in installation and easiness in processing of each structural part, and the other driven guide vanes 30 are driven to rotate by the aid of the actuator to drive the pushing ring to rotate; meanwhile, the problems of jamming and operation lag caused by the complex structure of the air inlet guide vane adjusting mechanism in the prior art can be effectively avoided, and the operation reliability of the compressor is improved.

The driving guide vane connecting piece 60 and the driven guide vane connecting piece 70 are both linear, the driving guide vane connecting piece 60 is fixedly connected with the driving guide vane 20 by the central part thereof, the driven guide vane connecting piece 70 is fixedly connected with the driven guide vane 30 by the central part thereof, and the driving guide vane connecting piece 60 and the driven guide vane connecting piece 70 are arranged on the outer peripheral surface of the base 10 along the circumferential direction of the base 10. As shown in fig. 1 to 4, 7 and 8, the driving vane connector 60 and the driven vane connector 70 are specifically long strip-shaped plates, and have the same structure, simple structure and easy processing.

The driving guide vane 20 and the driven guide vane 30 have substantially the same structure, except that a connection structure 21 for connecting to an actuator is formed on the driving guide vane 20.

Specifically, as shown in fig. 5, 7 and 8, the driving vane 20 includes a first blade portion 22, a first shaft portion 23 and a first connecting portion 24, the first blade portion 22 and the first connecting portion 24 are respectively connected to both ends of the first shaft portion 23, the first blade portion 22 is located in the central flow passage 11 of the base 10, the first shaft portion 23 extends outward through the radial mounting hole 12 of the base 10, and the first connecting portion 24 is located outside the base 10 so as to be connected to the driving vane connecting member 60 and the actuator. The cross section of the first connecting portion 24 is polygonal, the driving guide vane connecting piece 60 is correspondingly provided with a polygonal first connecting hole 61 matched with the first connecting portion 24, the first connecting portion 24 is inserted into the first connecting hole 61 in an interference manner to realize the connection between the driving guide vane connecting piece 60 and the driving guide vane 20, the first connecting portion 24 and the first connecting hole 61 are in polygonal fit, the sliding phenomenon caused by the connection of other shapes can be avoided, and the connection reliability is ensured.

Also, as shown in fig. 6, the driven vane 30 includes a second vane portion 31, a second rotation shaft portion 32 and a second connecting portion 33, the second vane portion 31 and the second connecting portion 33 are respectively located at both ends of the second rotation shaft portion 32, the second vane portion 31 is located in the center flow passage 11 of the base 10, the second rotation shaft portion 32 is outwardly protruded through the radial mounting hole 12 of the base 10, and the second connecting portion 33 is located at the outside of the base 10 so as to be connected to the driven vane connecting member 70. The cross section of the second connecting portion 33 is polygonal, a polygonal second connecting hole (the driven guide vane connecting piece 70 has the same structure as the driving guide vane connecting piece 60, not shown separately) matched with the second connecting portion 33 is correspondingly formed in the driven guide vane connecting piece 70, and the second connecting portion 33 is inserted into the second connecting hole in an interference manner to realize the connection between the driven guide vane connecting piece 70 and the driven guide vane 30.

Further, a free end of the first connecting portion 24 is formed with a first limiting portion 25, a diameter of the first connecting portion 24 is smaller than a diameter of the first rotating shaft portion 23 and smaller than a diameter of the first limiting portion 25, so that the driving guide vane connecting piece 60 is clamped between the first rotating shaft portion 23 and the first limiting portion 25, the driving guide vane connecting piece 60 and the driving guide vane 20 can be effectively prevented from being disconnected, the connecting structure 21 connected with the actuator is arranged on a free end face of the first limiting portion 25, and the connecting structure 21 is specifically a key groove and is simple in structure and easy to machine. Similarly, the free end of the second connecting portion 33 is formed with a second limiting portion 34, the diameter of the second connecting portion 33 is smaller than the diameter of the second rotating shaft portion 32 and smaller than the diameter of the second limiting portion 34, so that the driven guide vane connecting piece 70 is clamped between the second rotating shaft portion 32 and the second limiting portion 34, and the driving guide vane connecting piece 60 can be effectively prevented from being disconnected from the driven guide vane 30.

As shown in fig. 4, two ends of the driving vane connecting piece 60 are respectively hinged to the first linkage connecting piece 40 and the second linkage connecting piece 50 through ball bearings 80, and a fastening nut 90 is matched on a threaded ball rod for limiting. The ball head bearing 80 is adopted for connection, multi-angle rotation can be realized in the operation process, an additional lubricating system is not needed, only lubricating grease is needed for lubrication, and the phenomenon that the air inlet guide vane adjusting mechanism is blocked in the operation process in the embodiment is avoided. As shown in fig. 7 and 8, spherical grooves 62 are formed on both end portions of the driving vane connecting piece 60 to be engaged with the ball bearings 80.

Similarly, the two ends of the driven guide vane connecting piece 70 are respectively hinged with the first linkage connecting piece 40 and the second linkage connecting piece 50 through the ball bearings 80, and the threaded ball rod is matched with the fastening nut 90 for limiting.

According to the structure of the inlet guide vane adjusting mechanism of the embodiment, if the smooth operation of the mechanism is to be realized, the following dimensional requirements need to be met: h2 < H1 < H-2 XH 3, H2 < L = (0.35~0.92) H, -45 ° ≦ A ≦ 45 °, where, as shown in FIG. 3, H is the axial height of the base 10, and H1 is the axial distance between the first and second linkage members 40, 50; h2 is the width of the first position-limiting portion 25, and the width of the first position-limiting portion 25 is equal to the width of the second position-limiting portion 34; h3 is the thickness of the first linkage connection 40, the first linkage connection 40 and the second linkage connection 50 being equal in thickness; l is the mounting distance L between the two ends of the driving guide vane connector 60, and the mounting distance L between the two ends of the driven guide vane connector 70 is equal to the mounting distance L between the two ends of the driving guide vane connector 60; a is the range of the rotation angle of the driving guide vane connector 60, and the rotation angle of the driving guide vane connector 60 is equal to that of the driven guide vane connector 70.

This embodiment has still provided a cooling water set, specifically central air conditioning cooling water set, including centrifugal compressor, centrifugal compressor is this embodiment centrifugal compressor, no longer give unnecessary details here, and this embodiment centrifugal compressor simple structure, the operation is stable, then has further improved cooling water set's operating stability.

Example two

Referring to fig. 9 to 11, unlike the first embodiment, in the present embodiment, the first and second linking members 40 and 50 are both circular arcs, the number of the first linking members 40 is plural, the plurality of first linking members 40 are arranged at intervals on the same circumference, the number of the second linking members 50 is plural, and the plurality of second linking members 50 are arranged at intervals on the same circumference. In the present embodiment, the number of the first linkage 40 and the second linkage 50 is 3, and the first linkage 40 and the second linkage 50 may be aligned with each other or staggered, and the number is not limited to 3, and depends on the number of the base 10 and the vanes, as shown in fig. 9 and 10, in the present embodiment, the first linkage 40 and the second linkage 50 are staggered up and down along the axial direction of the base 10.

In the embodiment, the driving guide vane 20 is driven by an external actuator to rotate, and drives other driven guide vanes 30 to rotate through the driving guide vane connecting piece 60, the first linkage connecting piece 40, the second linkage connecting piece 50 and the driven guide vane connecting piece 70, so that synchronous rotation of the guide vanes is realized, compared with a guide vane adjusting mechanism in the prior art that the actuator is adopted to drive a pushing ring to rotate so as to drive each guide vane to rotate, the guide vane adjusting mechanism is simple in structure, stable in operation, reliable in performance, low in production cost, convenient to install, and easy to process each structural part; meanwhile, the problems of jamming and operation lag caused by the complex structure of the air inlet guide vane adjusting mechanism in the prior art can be effectively avoided, and the operation reliability of the compressor is improved.

As shown in fig. 10 and 11, the circumference of the first linkage connection piece 40 is coaxial with the circumference of the second linkage connection piece 50, and the first linkage connection piece 40 and the second linkage connection piece 50 are arranged at intervals along the axial direction of the base 10, i.e. the rotation axes of the first linkage connection piece 40 and the second linkage connection piece 50 are the axes of the base 10. The arc-shaped first linkage connecting piece 40 and the arc-shaped second linkage connecting piece 50 are adopted, so that the rotation synchronism of each guide vane can be realized, and the production cost is reduced.

In this embodiment, the driving guide vane connecting piece 60 and the driven guide vane connecting piece 70 are also linear, specifically, long-strip-shaped plate-shaped, and the two have the same structure, and are simple in structure and easy to process. The driving guide vane connecting piece 60 is connected with the driving guide vane 20 by the central part thereof, the driven guide vane connecting piece 70 is connected with the driven guide vane 30 by the central part thereof, the driving guide vane connecting piece 60 and the driven guide vane connecting piece 70 are arranged on the outer peripheral surface of the base 10 along the circumferential direction of the base 10, and particularly are uniformly distributed on the outer peripheral surface of the base 10, so that the first linkage connecting piece 40 and the second linkage connecting piece 50 are stressed uniformly, and the operation is stable.

Similarly, this embodiment has still provided a cooling water set, specifically central air conditioning cooling water set, including centrifugal compressor, centrifugal compressor be the centrifugal compressor of this embodiment, no longer give details here, this embodiment centrifugal compressor simple structure, the operation is stable, then has further improved cooling water set's operating stability.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A centrifugal compressor comprising a suction vane adjustment mechanism, wherein the suction vane adjustment mechanism comprises:

a base;

the guide vane is rotatably arranged on the base and comprises a driving guide vane and a plurality of driven guide vanes, and a connecting structure used for being connected with an actuator is formed on the driving guide vane;

the linkage connecting piece is rotatably arranged on the periphery of the base and comprises a first linkage connecting piece and a second linkage connecting piece;

the driving guide vane connecting piece is connected with the driving guide vane and synchronously rotates with the driving guide vane, and two ends of the driving guide vane connecting piece are respectively hinged with the first linkage connecting piece and the second linkage connecting piece;

a plurality of driven stator connecting pieces, its with driven stator one-to-one connect and with driven stator synchronous revolution, the both ends of driven stator connecting piece respectively with first linkage connecting piece reaches the second linkage connecting piece is articulated.

2. The centrifugal compressor according to claim 1,

the first linkage connecting piece with the second linkage connecting piece is ring-shaped, and coaxial sleeve is established the periphery of base, the first linkage connecting piece with the second linkage connecting piece is followed the axial interval of base sets up.

3. The centrifugal compressor of claim 2,

the initiative stator connecting piece with driven stator connecting piece all is the linearity, the initiative stator connecting piece with its central point position with the initiative stator is connected, driven stator connecting piece with its central point position with driven stator is connected, the initiative stator connecting piece with driven stator connecting piece is followed the circumference of base is laid on the outer peripheral face of base.

4. The centrifugal compressor according to claim 1,

the first linkage connecting pieces and the second linkage connecting pieces are both arc-shaped, the number of the first linkage connecting pieces is multiple, the first linkage connecting pieces are arranged on the same circumference at intervals, the number of the second linkage connecting pieces is multiple, and the second linkage connecting pieces are arranged on the same circumference at intervals.

5. The centrifugal compressor of claim 4,

the circumference of the first linkage connecting piece and the circumference of the second linkage connecting piece are coaxial, and the first linkage connecting piece and the second linkage connecting piece are arranged at intervals along the axial direction of the base.

6. The centrifugal compressor of claim 5,

the initiative stator connecting piece with driven stator connecting piece all is the linearity, the initiative stator connecting piece with its central point position with the initiative stator is connected, driven stator connecting piece with its central point position with driven stator is connected, the initiative stator connecting piece with driven stator connecting piece is followed the circumference of base is laid on the outer peripheral face of base.

7. The centrifugal compressor according to claim 1,

two ends of the driving guide vane connecting piece are respectively hinged with the first linkage connecting piece and the second linkage connecting piece through ball bearings; and two ends of the driven guide vane connecting piece are respectively hinged with the first linkage connecting piece and the second linkage connecting piece through ball bearings.

8. The centrifugal compressor according to claim 3 or 6,

the driving guide vane comprises a first blade part, a first rotating shaft part and a first connecting part, wherein the first blade part and the first connecting part are respectively connected to two ends of the first rotating shaft part, the cross section of the first connecting part is polygonal, a polygonal first connecting hole matched with the first connecting part is correspondingly arranged on the driving guide vane connecting part, and the first connecting part is inserted in the first connecting hole to realize the connection of the driving guide vane connecting part and the driving guide vane;

driven stator includes second blade portion, second pivot portion and second connecting portion, the second blade portion with second connecting portion are located respectively on the both ends of second pivot portion, the cross section of second connecting portion is the polygon, correspond on the driven stator connecting piece be equipped with the polygonal second connecting hole of second connecting portion looks adaptation, the second connecting portion are inserted and are established realize in the second connecting hole driven stator connecting piece with driven stator's connection.

9. The centrifugal compressor of claim 8,

a first limiting part is formed at the free end of the first connecting part, and the driving guide vane connecting piece is clamped between the first rotating shaft part and the first limiting part; the free end of second connecting portion is formed with the spacing portion of second, driven stator connecting piece presss from both sides and establishes second pivot portion with between the spacing portion of second.

10. A chiller including a centrifugal compressor, characterised in that the centrifugal compressor is as claimed in any one of claims 1 to 9.

Images