Stationary vane fixing structure

Abstract

The present application relates to a kind of vane fixed structure, including several vanes, each vane includes blade stem section and blade section, each blade stem section is fixedly connected with connecting structure, connecting structure is connected with locking structure, locking structure is used to lock connecting structure to make vane at its required working angle, blade stem section is connected with first limiting structure, and first limiting structure is used to limit the movement of blade stem section along the axis direction of vane mounting hole.The present application is divided into blade section and blade stem section by vane, blade stem section is connected with connecting structure, and connecting structure is locked by locking structure to make vane at its required working angle, the same blade different working angle vane can be universal, compared with the scheme of respectively processing different working angle vane in prior art, manufacturing cost is reduced, and excellent economy is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of compressors, and particularly relates to a stationary vane fixing structure. BACKGROUND

[0002] One of the main working components of an axial flow compressor is a stage stationary vane. The stationary vane is installed on a flow passage cylinder (stationary vane bearing cylinder) of the compressor. According to different use requirements, the stationary vane has two types of adjustable and fixed. In general, the stationary vane 1 is directly assembled on the stationary vane bearing cylinder 2 through an installation slot on the bearing cylinder, as shown in FIG. 1. Fig. 1-2

[0003] For example, the prior art discloses a stator vane installation structure, which realizes single-piece detachable function of the stator vane through a stator vane with a pressure plate, inner and outer ring light elastic members, inner and outer ring machine cases and a clamp for the outer ring pressure plate. Since the light elastic members are adopted, the light elastic members and the cold-state interference amount of the inner and outer ring vane profiles are utilized to realize assembly and positioning of the whole ring stator vane. In the assembly state, the stator vane has certain rigidity and can transmit the aerodynamic torque of the stator vane to the corresponding machine case installation edge position, thereby reducing the processing difficulty of the stator vane and improving the maintainability of the stator vane, and realizing the single-piece detachable function of the vane. However, even if the different stage stationary vanes with the same specifications and vane profiles on one compressor cannot be exchanged and used due to different working angles.

[0004] In order to solve the problem that different stage stationary vanes cannot be exchanged and used, the prior art adopts manufacturing of all kinds of similar and different stationary vanes. Therefore, the types of processed vanes are various, which leads to many vanes required for production, storage and the like of a company, reduces the universality of the stationary vanes, increases the operation pressure, cost and manufacturing efficiency of each link. SUMMARY

[0005] In order to solve all or part of the above problems, the application aims to provide a stationary vane fixing structure, which divides the stationary vane into a blade stem segment and a blade body segment, connects the blade stem segment with a connecting structure, locks the connecting structure through a locking structure so that the stationary vane is at a required working angle, and realizes the purpose that the stationary vanes with the same vane profile and different working angles can be universal.

[0006] According to one aspect of the application, a stationary vane fixing structure is provided, which comprises a plurality of stationary vanes, each of the stationary vanes comprises a blade stem segment and a blade body segment, each of the blade stem segments is fixedly connected with a connecting structure at one end of a stationary vane mounting hole of a stationary vane bearing cylinder, the connecting structure is connected with a locking structure, the locking structure is used for locking the connecting structure so that the stationary vane is at a required working angle, and the blade stem segment is connected with a first limiting structure, and the first limiting structure is used for limiting movement of the blade stem segment along an axis direction of the stationary vane mounting hole. ​

[0007] Further, each of the connecting structures is a connecting block, a matching hole is formed on the connecting block, the matching hole of the connecting block is sleeved on the part of the blade stem that protrudes out of the stator blade mounting hole, the matching hole is a non-circular hole, and the shape of the part of the blade stem that protrudes out of the stator blade mounting hole is matched with the shape of the matching hole; the blade stem is connected with a second limiting structure, and the second limiting structure is used to limit the movement of the connecting block along the axial direction of the stator blade mounting hole.

[0008] Further, the blade stem comprises a first blade stem, the first blade stem is located in the stator blade mounting hole, one end of the first blade stem is connected with the blade body section, and the other end of the first blade stem is connected with a second blade stem; the shape of the second blade stem is matched with the shape of the matching hole; the diameter of the first blade stem is greater than the diameter of the second blade stem; the connecting block is sleeved on the outside of the second blade stem; and the second limiting structure is connected to the end of the second blade stem and presses the connecting block on the first blade stem.

[0009] Further, the second limiting structure is a limiting screw, a screw hole extending from the end to the first blade stem is formed on the second blade stem, and a gasket is arranged between the limiting screw and the connecting block; along the axial direction of the matching hole, the thickness of the second blade stem is less than or equal to the thickness of the connecting block.

[0010] Further, the first limiting structure is a stator blade sleeve, the lower end of the stator blade sleeve abuts against the collar of the lower part of the blade stem, the upper end of the stator blade sleeve abuts against the connecting block, the stator blade sleeve is arranged in the stator blade mounting hole and is fixedly connected with the stator blade cylinder.

[0011] Further, the end of the stator blade sleeve that protrudes out of the stator blade mounting hole is provided with a collar, the collar is located at the end of the stator blade sleeve that is away from the blade body section, one side of the collar is fixedly connected with the stator blade cylinder through a first fastener, and the other side of the collar is fixedly connected with the stator blade cylinder through a second fastener.

[0012] Further, one side of each of the connecting blocks is connected with a first extension, the extension direction of the first extension is perpendicular to the axial direction of the stator blade cylinder, and the included angle between the projection of the line between any point on the matching hole and the center of the matching hole on the plane perpendicular to the axis of the matching hole and the extension direction of the first extension is determined by the working angle of the stator blade matched with the matching hole.

[0013] For the stationary vane connected on the stationary vane cylinder, if the total number of stationary vanes of a stage is 2n+2, n is a natural number, then for any natural number m less than or equal to n, the first extension part of the 2m+1th stationary vane and the first extension part of the 2m+2th stationary vane are fixed through the locking structure;

[0014] If the total number of stationary vanes of a stage is 2n+3, n is a natural number, then for any natural number m less than or equal to n, the first extension part of the 2m+1th stationary vane and the first extension part of the 2m+2th stationary vane are fixed through the locking structure, and the connecting block of the 2n+2th stationary vane and the first extension part of the 2n+3th stationary vane are fixed and connected through the locking structure.

[0015] Further, one end of each of the first extension parts away from the connecting block is connected with a first lapping block, a first connecting hole is formed on the first lapping block, the axis of the first connecting hole is perpendicular to the extension direction of the first extension part, the axis of the first connecting hole is perpendicular to the axis of the matching hole, and the locking structure fixes and connects two first extension parts by penetrating the first connecting holes of the two first lapping blocks.

[0016] Further, if the total number of stationary vanes of a stage is 2n+3, the connecting block of the 2n+2th stationary vane is connected with a second extension part, and the first extension part and the second extension part are located on the two sides of the connecting block, respectively, a second connecting hole is formed on one end of the second extension part away from the connecting block, the axis of the second connecting hole is parallel to the axis of the first connecting hole, and the locking structure connects the connecting block of the 2n+2th stationary vane and the connecting block of the 2n+3th stationary vane by penetrating the second connecting hole of the 2n+2th stationary vane and the first connecting hole of the 2n+3th stationary vane.

[0017] Further, the locking structure comprises locking connectors, one end of each of the locking connectors is connected with a fixing head, and the tail of each of the locking connectors penetrating two first connecting holes is connected with a fastener, and the two fasteners press two first extension parts together.

[0018] From the above technical solution, it can be seen that the stationary vane fixing structure provided by the application has the following beneficial effects:

[0019] The application divides the stationary vane into a blade body section and a blade stem section, connects the blade stem section with a connecting structure, and locks the connecting structure through a locking structure so that the stationary vane is at a required working angle, thereby achieving the purpose that the stationary vanes with the same blade shape can be used at different working angles, and the manufacturing cost is reduced compared with the scheme of respectively processing stationary vanes at different working angles in the prior art, and excellent economy is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1-2 This is a schematic diagram of the stationary vane being fixed on the stationary vane support cylinder in the prior art;

[0021] Fig. 3 This is a cross-sectional view of the stationary blade fixing structure along the axial direction of the stationary blade bearing cylinder according to an embodiment of the present invention;

[0022] Fig. 4 This is a cross-sectional view of the stationary blade fixing structure along the radial direction of the stationary blade bearing cylinder according to an embodiment of the present invention;

[0023] Fig. 5 This is a schematic diagram of the connection between two connecting blocks via a locking structure in the stationary blade fixing structure of an embodiment of the present invention;

[0024] Fig. 6 This is a schematic diagram of the connecting block portion according to an embodiment of the present invention;

[0025] The attached figures are labeled as follows: stationary blade 1, blade body section 11, blade petiole section 12, first blade petiole section 121, second blade petiole section 122, stationary blade support cylinder 2, connecting block 3, mating hole 31, first extension 32, first overlapping block 33, first connecting hole 34, stationary blade bushing 4, shaft collar 41, first fastener 42, second fastener 43, second limiting structure 5, locking connector 6. Detailed Implementation

[0026] To better understand the purpose, structure, and function of this invention, a stationary blade fixing structure of this invention will be described in further detail below with reference to the accompanying drawings.

[0027] like Fig. 3-4 As shown, an embodiment of the present invention illustrates a stationary blade fixing structure, comprising a plurality of stationary blades 1, each stationary blade 1 comprising a blade stalk segment 12 and a blade body segment 11. Each end of the blade stalk segment 12 extending out of the stationary blade mounting hole of the stationary blade support cylinder 2 is fixedly connected to a connecting structure, the connecting structure being connected to a locking structure, the locking structure being used to lock the connecting structure so that the stationary blade 1 is at its required working angle; the blade stalk segment 12 is connected to a first limiting structure, the first limiting structure being used to restrict the movement of the blade stalk segment 12 along the axial direction of the stationary blade mounting hole.

[0028] In the embodiment, the stationary vane 1 is divided into a blade stem section 12 and a blade section 11, movement of the blade stem section 12 along the axis direction of the stationary vane mounting hole is limited by the first limiting structure, so the stationary vane 1 cannot move along the axis direction of the stationary vane mounting hole; the blade stem section 12 of the stationary vane 1 is fixedly connected with the connecting structure, that is, the connecting structure cannot move along the axis direction of the stationary vane mounting hole, since the first limiting structure cannot limit the rotation of the blade stem section 12, after the connecting structure is fixedly connected with the blade stem section 12, the two can rotate together, rotation of the blade stem section 12 will cause the working angle of the stationary vane 1 to change; the locking structure is used to lock the connecting structure so that the stationary vane 1 is at the working angle required by it, when the connecting structure is rotated to the angle of the stationary vane equal to the working angle of the stationary vane, locking of the connecting structure by the locking structure realizes fixation of the stationary vane, thereby realizing the purpose that the stationary vane 1 with the same blade shape and different working angles can be universal.

[0029] The setting of the embodiment realizes the purpose that the stationary vane 1 with the same blade shape and different working angles can be universal, specifically, when the stationary vane 1 needs to be used at a specific working angle, the stationary vane 1 with the same blade shape is selected, the stationary vane 1 is connected with the connecting structure, and the connecting structure is locked by the locking structure, after locking, the position of the connecting structure needs to meet the working angle requirement of the stationary vane 1.

[0030] In specific implementation, the position of the locking structure can be fixed, and the universal use of the stationary vane 1 with the same blade shape and different working angles can be realized by setting different connecting structures, specifically, after the connecting structure matched with the required working angle is connected with the stationary vane 1, the connecting structure is rotated to the locking structure, and locking of the connecting structure by the locking structure realizes fixation of the working angle of the stationary vane 1, compared with the scheme of respectively processing each stationary vane 1 with the same blade shape and different working angles in the prior art, the manufacturing cost is reduced.

[0031] Specifically, as shown in Fig. 6 each connecting structure is a connecting block 3, a matching hole 31 is formed in the connecting block 3, the matching hole 31 of the connecting block 3 is sleeved on the part of the blade stem section 12 extending out of the stationary vane mounting hole, the matching hole 31 is a non-circular hole, and the shape of the part of the blade stem section 12 extending out of the stationary vane mounting hole is matched with the matching hole 31; the blade stem section 12 is connected with a second limiting structure 5, and the second limiting structure 5 is used to limit the movement of the connecting block 3 along the axis direction of the stationary vane mounting hole.

[0032] In the embodiment, the fixed connection of the connecting block 3 and the blade stem 12 is realized by the cooperation of the cooperation hole 31 and the second limiting structure 5. Specifically, the cooperation hole 31 is a non-circular hole, and the part of the blade stem 12 extending out of the stator blade mounting hole cooperates with the cooperation hole 31. Therefore, after the cooperation hole 31 is sleeved on the part of the blade stem 12 extending out of the stator blade mounting hole, the cooperation hole 31 and the blade stem 12 cannot rotate relative to each other. The movement of the connecting block 3 along the axial direction of the stator blade mounting hole is limited by the second limiting structure 5. The second limiting structure 5 is connected with the blade stem 12, so as to realize the fixed connection of the connecting block 3 and the blade stem 12. When specifically arranged, the cooperation hole 31 can be a waist hole or the like.

[0033] In an embodiment, as shown in Fig. 3-4 the blade stem 12 includes a first blade stem 121, the first blade stem 121 is located in the stator blade mounting hole, one end of the first blade stem 121 is connected with the blade body 11, and the other end of the first blade stem 121 is connected with a second blade stem 122. The shape of the second blade stem 122 cooperates with the shape of the cooperation hole 31. The diameter of the first blade stem 121 is greater than the diameter of the second blade stem 122. The connecting block 3 is sleeved outside the second blade stem 122. The second limiting structure 5 is connected at the end of the second blade stem 122. The second limiting structure 5 presses the connecting block 3 on the first blade stem 121.

[0034] Specifically, the blade stem 12 includes the first blade stem 121 and the second blade stem 122. The second blade stem 122 is sleeved with the cooperation hole 31 of the connecting block 3. Since the cooperation hole 31 is a non-circular hole, and the shape of the second blade stem 122 cooperates with the shape of the cooperation hole 31, the connecting block 3 cannot move relative to the second blade stem 122 after being sleeved on the second blade stem 122. The diameter of the first blade stem 121 is greater than the diameter of the second blade stem 122. Therefore, the first blade stem 121 can limit the movement direction of the connecting block 3. The connecting block 3 sleeved on the second blade stem 122 can be pressed on the first blade stem 121 by the second limiting structure 5.

[0035] As known from the foregoing, the cooperation hole 31 on the connecting block 3 is sleeved on the second blade stem 122, and the second limiting structure 5 presses the connecting block 3 on the first blade stem 121. Specifically, the second limiting structure 5 is a fixed screw. A screw hole extending from the end to the first blade stem 121 is formed in the second blade stem 122. The fixed screw is connected in the screw hole, so as to press the connecting block 3 on the first blade stem 121 by the head of the fixed screw. A gasket is arranged between the limiting screw and the connecting block 3. In order to press the connecting block 3 sleeved on the second blade stem 122 on the first blade stem 121 by the fixed screw, the thickness of the second blade stem 122 along the axial direction of the cooperation hole 31 needs to be less than or equal to the thickness of the connecting block 3.

[0036] wherein, Fig. 3Fig. 3 is a sectional view along the axial direction of the stator blade support cylinder 2, and three stator blades belong to different stages; Fig. 4 Fig. 4 is a sectional view along the radial direction of the stator blade support cylinder 2, and two stator blades belong to the same stage, and the two connecting blocks 3 are connected through the locking structure.

[0037] In an embodiment, the first limiting structure is a stator blade shaft sleeve 4, the lower end of the stator blade shaft sleeve 4 abuts against the shaft ring of the lower part of the blade handle section, the upper end of the stator blade shaft sleeve 4 abuts against the connecting block 3, the stator blade shaft sleeve 4 is arranged in the stator blade mounting hole and is fixedly connected with the stator blade support cylinder 2.

[0038] In the embodiment, the lower end of the stator blade shaft sleeve 4 abuts against the shaft ring of the lower part of the blade handle section, the upper end of the stator blade shaft sleeve 4 abuts against the connecting block 3, and the stator blade shaft sleeve 4 is fixedly connected with the stator blade support cylinder 2, so that the stator blade shaft sleeve 4 can prevent the movement of the blade handle section along the axial direction of the stator blade mounting hole, thereby achieving the purpose of limiting the movement of the stator blade 1 along the axial direction of the stator blade mounting hole through the first limiting structure.

[0039] Specifically, the end of the stator blade shaft sleeve 4 extending out of the stator blade mounting hole is provided with a shaft ring 41, the shaft ring 41 is located at the end of the stator blade shaft sleeve 4 away from the blade body section 11, one side of the shaft ring 41 is fixedly connected with the stator blade support cylinder 2 through a first fastener 42, and the other side of the shaft ring 41 is fixedly connected with the stator blade support cylinder 2 through a second fastener 43.

[0040] The end of the stator blade shaft sleeve 4 extending out of the stator blade mounting hole is provided with a shaft ring 41, and the fixed connection of the stator blade shaft sleeve 4 with the stator blade support cylinder 2 realizes the fixed connection of the first blade handle section 121 with the stator blade support cylinder 2. The first fastener 42 and the second fastener 43 are both connecting screws or the like. The stator blade shaft sleeve of the embodiment is optimized in structure on the basis of the stator blade shaft sleeve of the adjustable stator blade compressor according to the use requirements, reduces the manufacturing cost, and achieves excellent economy.

[0041] In an embodiment, as shown in Fig. 4-6 Fig. 5, one side of each connecting block 3 is connected with a first extension 32, the extension direction of the first extension 32 is perpendicular to the axial direction of the stator blade support cylinder 2, and the included angle between the projection of the line between any point on the matching hole 31 and the center of the matching hole 31 on the plane perpendicular to the axis of the matching hole 31 and the extension direction of the first extension 32 is determined by the working angle of the stator blade 1 matched with the matching hole 31;

[0042] For the stationary vane 1 connected to the stationary vane cylinder 2, if the total number of stationary vanes 1 of a certain stage is 2n+2, n is a natural number, then for any natural number m less than or equal to n, the first extension part 32 of the 2m+1 th stationary vane 1 and the first extension part 32 of the 2m+2 th stationary vane 1 are fixed by the locking structure; if the total number of stationary vanes 1 of a certain stage is 2n+3, n is a natural number, then for any natural number m less than or equal to n, the first extension part 32 of the 2m+1 th stationary vane 1 and the first extension part 32 of the 2m+2 th stationary vane 1 are fixed by the locking structure, and the connecting block 3 of the 2n+2 th stationary vane 1 and the first extension part 32 of the 2n+3 th stationary vane 1 are fixed and connected by the locking structure.

[0043] As known from the foregoing, the same vane shape and different working angle stationary vanes 1 can be achieved by the connecting structure and the locking structure, specifically, one side of the connecting block 3 is connected with the first extension part 32, the extension direction of the first extension part 32 is perpendicular to the axis direction of the stationary vane cylinder 2, and the adjacent two first extension parts 32 are locked by the locking structure, in order to achieve the purpose of the same vane shape and the same vane 1 being universal, the included angle between the projection of the line between any point A on the matching hole 31 and the center O of the matching hole 31 in the plane perpendicular to the axis of the matching hole 31 and the extension direction of the first extension part 32 is determined by the working angle of the stationary vane 1 matched with the matching hole 31, so that according to the included angle and the angle of the blade body section 11 itself of the stationary vane 1, the actual angle of the stationary vane 1 when the two first extension parts 32 are locked by the locking structure can be the working angle, and the purpose of the same vane shape and the same vane being universal is achieved.

[0044] For any working angle of the stationary vane 1, as shown in Fig. 6 the included angle (angle AOB) between the projection line segment OA of the line between any point A on the matching hole 31 and the center O of the matching hole 31 in the circumferential direction of the matching hole 31 and the extension direction (OB direction) of the stationary vane cylinder 2 is determined by the working angle of the stationary vane matched with the matching hole 31, so that different connecting blocks 3 with different included angles can be configured according to the different working angles of the stationary vanes 1, and the connecting block 3 is locked by the locking structure after being connected with the blade stem section to achieve the fixation of the stationary vane 1, and the actual working angle of the fixed blade is the same as the required working angle.

[0045] In the embodiment, the first extension part 32 is arranged on one side of each connecting block 3, and then the two first extension parts 32 are connected by the locking structure, so that the fixation of the stationary vane with a specific working angle can be achieved, and the problem of the change of the working angle of the stationary vane caused by the rotation of the connecting block 3 after the blade stem section is connected with the connecting block 3 is avoided, and the locking of the connecting structure is facilitated.

[0046] Specifically, for the stationary vane 1 connected to the stationary vane cylinder 2, the total number of each stationary vane 1 is generally even, that is, 2n+2, n is a natural number, then for any natural number m less than or equal to n, the first extension part 32 of the 2m+1th stationary vane and the first extension part 32 of the 2m+2th stationary vane are fixed by the locking structure, so as to realize the fixation of the connecting structure. For example, in the case of n=5, that is, the total number of stationary vanes in this stage is 12, for natural number 0 less than or equal to 5 (that is, m=0), the first extension part 32 of the first stationary vane and the first extension part 32 of the second stationary vane are fixed by the locking structure, for natural number 1 less than or equal to 5 (that is, m=1), the first extension part 32 of the third stationary vane and the first extension part 32 of the fourth stationary vane are fixed by the locking structure, and so on, so as to realize the fixation of the connecting structure of each stationary vane in the same stage by the locking structure.

[0047] For the special case that the total number of each stationary vane is odd, the total number of stationary vanes is represented by 2n+3, n is a natural number, then for any natural number m less than or equal to n, the first extension part 32 of the 2m+1th stationary vane and the first extension part 32 of the 2m+2th stationary vane are also fixed by the locking structure, the difference is that the connecting block 3 of the 2n+2th stationary vane and the first extension part 32 of the 2n+3th stationary vane are also fixed and connected by the locking structure, so as to realize the fixation of the connecting structure of the 2n+3th stationary vane. Also taking the case of n=5 as an example, at this time the total number of stationary vanes is 13, the first extension part 32 of the 11th stationary vane and the first extension part 32 of the 12th stationary vane are fixed by the locking structure, and the connecting block 3 of the 12th stationary vane and the first extension part 32 of the 13th stationary vane are fixed by the locking structure.

[0048] In an embodiment, the first extension part 32 is connected with the first lap block 33 at the end away from the connecting block 3, the first lap block 33 is provided with the first connecting hole 34, the axis of the first connecting hole 34 is perpendicular to the extension direction of the first extension part 32, the axis of the first connecting hole 34 is perpendicular to the axis of the matching hole 31, and the locking structure fixes and connects the two first extension parts 32 by penetrating the first connecting holes 34 of the two first lap blocks 33.

[0049] In this embodiment, the locking structure connects the two first extension parts 32 by penetrating the first connecting holes 34 of the first lap blocks 33, and this way of fixing the two connecting blocks 3 is simple and easy to realize.

[0050] In an embodiment, if the total number of vanes of a stage is 2n+3, the connecting block 3 of the 2n+2th vane is connected with a second extension part, and the first extension part 32 and the second extension part are located on two sides of the connecting block 3 respectively, the second extension part is provided with a second connecting hole at an end away from the connecting block 3, the axis of the second connecting hole is parallel to the axis of the first connecting hole 34, and the locking structure connects the connecting block of the 2n+2th vane and the connecting block 3 of the 2n+3th vane by penetrating the second connecting hole of the 2n+2th vane and the first connecting hole 34 of the 2n+3th vane.

[0051] In the embodiment, for the case that the total number of vanes of each stage is odd, the second extension part is connected with the first extension part 32 of the 2n+3th vane by connecting the second extension part on one side of the connecting block 3 of the 2n+2th vane, so as to fix the connecting block of the last vane. Specifically, the second extension part is provided with a second connecting hole, and the locking structure connects the two connecting blocks 3 by penetrating the second connecting hole and the first connecting hole 34 of the 2n+3th vane.

[0052] Specifically, the locking structure includes a locking connecting piece 6, one end of each locking connecting piece 6 is fixedly connected with a fixed head, and the tail part of each locking connecting piece 6 penetrating the two first connecting holes 34 is connected with a fastener, and the fastener presses the two first extension parts 32 on the fixed head of the locking connecting piece 6.

[0053] In the embodiment, the locking structure includes the locking connecting piece 6 and the fastener, for the case that the total number of vanes of each stage is even, the fastener is connected at the tail part of each locking connecting piece 6 penetrating the two first connecting holes 34, and for the case that the total number of vanes of each stage is odd, the fastener is connected at the tail part of each locking connecting piece 6 penetrating the two first connecting holes 34 and at the tail part of the locking connecting piece 6 penetrating the first connecting hole 34 and the second connecting hole. Specifically, the locking connecting piece 6 is a connecting screw or a connecting screw rod with a nut at one end, and the fastener is a locking nut matched with the connecting screw or the connecting screw rod. The locking structure of the embodiment adopts the structure of the connecting screw or the connecting screw rod and the locking nut, which is economical and practical and convenient to install and disassemble.

[0054] In the specific installation, first, the vane shaft sleeve is assembled on the vane bearing cylinder, the vane is assembled on the vane shaft sleeve, according to the working angle requirement of the vane, the connecting block with an angle AOB matching the working angle of the vane is selected, the connecting block is sleeved on the vane handle section, the vane handle section and the second limiting structure 5 are connected, and finally the two connecting blocks are connected by the locking structure.

[0055] In the embodiment of the present application, the working angle of the static vane of each stage is obtained by combining the angle on the connecting block and the standard angle of the vane itself, and the static vane and the connecting block are assembled to realize the configuration and fastening of the static vane angle. For different stage vanes of the same vane type specification, the standard angle of the vane itself is the same, thereby realizing the universality of the vane, realizing the universality of different stage static vanes, and improving the universality of the static vane of the compressor.

[0056] The static vane fixing structure of the embodiment of the present application realizes the universality of the static vane of the static vane fixed compressor and the static vane adjustable compressor through structural innovation, makes the static vane highly universal in the fixed compressor and the adjustable compressor, reduces the cost and efficiency of replacing the static vane, and realizes the standardization of different stage static vanes of the same specification and vane type in the static vane fixed compressor, thereby improving the universality.

[0057] The static vane shaft sleeve of the embodiment of the present application is optimized in structure on the basis of the static vane bearing of the static vane adjustable compressor according to the use requirement, reduces the manufacturing cost, and achieves excellent economy.

[0058] The embodiment of the present application realizes that the same specification standard vane can be used for different stages and different working angles through the redesign of the connecting block, and realizes the assembly and fixing of the static vanes of each stage, thereby reducing the difficulty of assembling the compressor.

[0059] The static vane fixing structure of the embodiment of the present application has the advantages of simple structure, economy, practicality, convenient installation and disassembly, realizes the high universality and standardization of parts in equipment manufacturing, and greatly reduces the production cost of the related industry.

[0060] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the general meanings understood by the skilled in the art to which the present application belongs.

[0061] In addition, the terms "one", "two" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0062] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalent replacements. These modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the description of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vane fixing structure characterized by comprising: The static vane includes a plurality of static vanes, each of which includes a blade stem and a blade body, each of the blade stems is fixedly connected with a connecting structure at one end of a static vane mounting hole of a static vane cylinder, the connecting structure is connected with a locking structure, the locking structure is used for locking the connecting structure so that the static vane is at a required working angle, and the blade stem is connected with a first limiting structure for limiting movement of the blade stem along an axis direction of the static vane mounting hole. Each of the connecting structures is a connecting block, a matching hole is formed in the connecting block, one side of each of the connecting blocks is connected with a first extension part, an extension direction of the first extension part is perpendicular to an axis direction of the static vane cylinder, and an included angle between a projection of a line between any point on the matching hole and a center of the matching hole on a plane perpendicular to an axis of the matching hole and the extension direction of the first extension part is determined by a working angle of the static vane matched with the matching hole. Each of the first extension parts is connected with a first lapping block at one end away from the connecting block, a first connecting hole is formed in the first lapping block, an axis of the first connecting hole is perpendicular to the extension direction of the first extension part, the axis of the first connecting hole is perpendicular to the axis of the matching hole, and the locking structure is fixedly connected with two first extension parts by penetrating the first connecting holes of the two first lapping blocks. The first limiting structure is a static vane shaft sleeve, a lower end of the static vane shaft sleeve abuts against a shaft ring of a lower part of the blade stem, an upper end of the static vane shaft sleeve abuts against the connecting block, the static vane shaft sleeve is arranged in the static vane mounting hole and is fixedly connected with the static vane cylinder.

2. The vane holding structure according to claim 1, characterized by The matching hole of the connecting block is sleeved on a part of the blade stem extending out of the static vane mounting hole, the matching hole is a non-circular hole, and a shape of the part of the blade stem extending out of the static vane mounting hole is matched with the matching hole; the blade stem is connected with a second limiting structure for limiting movement of the connecting block along the axis direction of the static vane mounting hole.

3. The vane holding structure according to claim 2, characterized by The blade stem includes a first blade stem, the first blade stem is located in the static vane mounting hole, one end of the first blade stem is connected with the blade body, the other end of the first blade stem is connected with a second blade stem, a shape of the second blade stem is matched with a shape of the matching hole, a diameter of the first blade stem is greater than a diameter of the second blade stem, the connecting block is sleeved on an outer part of the second blade stem, the second limiting structure is connected at an end part of the second blade stem, and the second limiting structure presses the connecting block on the first blade stem.

4. The vane holding structure according to claim 3, characterized by The second limiting structure is a limiting screw, a screw hole extending from the end part to the first blade stem is formed in the second blade stem, and a gasket is arranged between the limiting screw and the connecting block; along the axis direction of the matching hole, a thickness of the second blade stem is less than or equal to a thickness of the connecting block.

5. The vane holding structure according to claim 1, characterized by The end of the stationary blade sleeve extending out of the stationary blade mounting hole is provided with a shaft ring, which is located on the end of the stationary blade sleeve away from the blade body section, one side of the shaft ring is fixedly connected with the stationary blade cylinder through a first fastener, and the other side of the shaft ring is fixedly connected with the stationary blade cylinder through a second fastener.

6. The vane holding structure according to claim 2, characterized by For the stationary blades connected to the stationary blade cylinder, if the total number of stationary blades of a stage is 2n+2, n is a natural number, then for any natural number m less than or equal to n, the first extension part of the 2m+1th stationary blade and the first extension part of the 2m+2th stationary blade of the stage are fixed through the locking structure; If the total number of stationary blades of a stage is 2n+3, n is a natural number, then for any natural number m less than or equal to n, the first extension part of the 2m+1th stationary blade and the first extension part of the 2m+2th stationary blade of the stage are fixed through the locking structure, and the connecting block of the 2n+2th stationary blade and the first extension part of the 2n+3th stationary blade are fixedly connected through the locking structure.

7. The vane holding structure according to claim 1, characterized by If the total number of stationary blades of a stage is 2n+3, the connecting block of the 2n+2th stationary blade is connected with a second extension part, and the first extension part and the second extension part are located on the two sides of the connecting block respectively, the end of the second extension part away from the connecting block is provided with a second connecting hole, the axis of the second connecting hole is parallel to the axis of the first connecting hole, and the locking structure connects the connecting block of the 2n+2th stationary blade and the connecting block of the 2n+3th stationary blade by passing through the second connecting hole of the 2n+2th stationary blade and the first connecting hole of the 2n+3th stationary blade.

8. The vane holding structure according to claim 1, characterized by The locking structure comprises locking connectors, one end of each locking connector is connected with a fixing head, the tail of each locking connector passing through two first connecting holes is connected with a fastener, and two fasteners press two first extension parts together.

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