Compressor width variable diffuser structure and compressor using same

Abstract

The compressor width variable diffuser structure comprises a shell and a diffuser ring, the diffuser structure comprises adjusting wheel sets, adjusting rod sets and a transmission assembly, the multiple adjusting wheel sets are connected with the shell through mounting columns, each adjusting rod set is connected with the corresponding adjusting wheel set in a matched mode, and the transmission assembly is connected with the shell. One wheel body in each adjusting wheel set is connected with a main driving shaft, the main driving shaft is connected with a rotary driving unit, and the rotary driving unit drives the corresponding wheel body to rotate through the main driving shaft so as to drive a connecting rod, a pushing rod and the diffusion ring connected with the pushing rod to move. The compressor is simple in structure and assembly, low in cost, high in stroke precision, small in mechanical error and long in service life through aging tests, the adjusting wheel set, the adjusting rod set and the transmission assembly are almost not damaged in the service life period of the compressor, and maintenance and repair cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal compressor technical field, especially in kind compressor width variable diffuser structure and use its compressor, this structure can control centrifugal compressor impeller exhaust port width size, with impeller air inlet actuating mechanism realizes linkage control. BACKGROUND

[0002] Compressors are used in devices that require fluid to be compressed, and the compressor has an impeller that, when rotated, can act on the fluid to increase the pressure of the fluid. Typically, the compressor includes a diffuser provided at the outlet of the impeller (impeller exhaust port) to stabilize the flowing fluid. In addition, the compressor can also include an inlet guide vane provided at the inlet of the impeller, the inlet guide vane is provided at the fluid inlet of the compressor, the inlet guide vane driving wheel extends in the axial direction parallel to the central axis, and drives the inlet guide vane to rotate, and the opening degree of the inlet guide vane can control the flow of fluid entering the compressor.

[0003] When the existing centrifugal compressor is used, airflow separation phenomenon occurs when deviating from the rated operating condition, and stall is generated. At this time, the fluid flow is unstable and even backflow occurs, and vibration and noise increase. The variable diffuser structure is added at the outlet of the impeller, when the flow rate decreases, the width of the impeller outlet is adjusted to reduce, and the vortex at the outlet of the impeller is reduced to prevent stall from occurring, so as to stabilize the flow of fluid in the compressor, thereby reducing the noise and vibration of the compressor and improving the working efficiency. At low flow rate, the width of the impeller outlet is reduced to reduce the cross-sectional area of the impeller outlet, thereby preventing the fluid flowing through the impeller from stagnating or even backflowing; at high flow rate, the width of the impeller outlet is widened to provide a larger flow passage cross-sectional area for the fluid.

[0004] In the prior art, there is a structure of variable diffuser width, for example, the Chinese invention patent disclosed in the authorized announcement No. CN 107255083B discloses a variable geometry diffuser with extended stroke and a control method thereof. The diffuser uses a rotatable driving ring to drive the diffuser ring to change the width of the airflow outlet. The outer circumferential surface of the driving ring is provided with a spiral groove (track). In actual production process, the requirement for the spiral groove on the outer circumferential surface of the driving ring is very high, the machining difficulty is large, the cost is high, and the machining precision is difficult to guarantee.

[0005] Therefore, how to solve the problems of the existing variable diffuser width structure, such as high requirement for the spiral groove on the outer circumferential surface of the driving ring, high cost, and large machining difficulty, has become the research topic of the utility model. Utility model content

[0006] The utility model provides a kind of compressor width variable diffuser structure and use its compressor.

[0007] To achieve the above object, the utility model discloses a first aspect adopts a technical scheme, which is a kind of compressor width variable diffuser structure, the diffuser structure is used for compressor, the compressor includes shell, diffuser ring, its innovation point lies in:

[0008] The diffuser structure includes adjusting wheel group, adjusting rod group, transmission assembly.

[0009] A plurality of adjusting wheel groups are connected to the shell by mounting columns, the adjusting wheel group has a wheel body and a rotating block, the rotating block rotates synchronously with the wheel body, and a chute is arranged in the rotating block.

[0010] Each adjusting rod group is connected to the corresponding adjusting wheel group, and the adjusting rod group has a sliding block, a connecting rod and a push rod, the sliding block is movably installed in the chute, one end of the connecting rod is rotatably connected to the sliding block, the other end is connected to the push rod, and the push rod is connected to the diffuser ring after passing through a guide hole in the shell.

[0011] The transmission assembly includes a transmission wheel and a transmission rope, and one or more transmission wheels are selectively arranged between each adjusting wheel group, the transmission rope is wound around all wheel bodies and transmission wheels to achieve synchronous rotation.

[0012] One of the wheel bodies in each adjusting wheel group is connected to a main drive shaft, the main drive shaft is connected to a rotating drive unit, the corresponding wheel body is driven to rotate by the rotating drive unit through the main drive shaft, and all wheel bodies and transmission wheels are synchronously rotated, the rotating block is synchronously driven to rotate by the wheel body, and the sliding block in the chute is driven to slide, the connecting rod, the push rod and the diffuser ring connected to the push rod are driven to move.

[0013] To achieve the above object, the utility model discloses a second aspect adopts a technical scheme, which is a kind of compressor, the compressor includes shell, diffuser ring, and the diffuser structure of like the utility model discloses a first aspect between shell, diffuser ring is arranged.

[0014] The related content of the utility model is explained as follows:

[0015] 1. In the utility model, in view of the problems of high requirement, high cost and big processing difficulty of the spiral groove of the outer circumferential surface of the driving ring in the prior variable diffuser width structure, the compressor width variable diffuser structure with adjusting wheel group, adjusting lever group and transmission assembly and the compressor using the diffuser structure are innovatively designed, in the diffuser structure, the adjusting wheel group is connected with the shell through the mounting column, each adjusting lever group is connected with the corresponding adjusting wheel group, the push rod in the adjusting lever group is connected with the diffuser ring after passing through the guide hole on the shell, the diffuser ring reciprocates under the drive of the push rod to adjust the width gap of the diffuser ring, specifically, the rotating drive unit drives the corresponding wheel body to rotate through the main drive shaft, all wheel bodies and transmission wheels synchronously rotate under the drive of the transmission rope, the rotating block synchronously rotates under the drive of the wheel body and drives the sliding block in the sliding groove to slide, the sliding block drives the connecting rod, the push rod and the diffuser ring connected with the push rod to move, the structure is simple to assemble, low in cost, high in stroke precision, small in mechanical error and long in service life after aging test, the adjusting wheel group, the adjusting lever group and the transmission assembly are almost not damaged in the service life of the compressor, thereby reducing the maintenance cost.

[0016] 2. In the utility model, the wheel body connected with the main drive shaft is defined as the driving wheel, and the other wheel bodies are defined as the driven wheels, the tensioning wheel is arranged on one side of the driving wheel to ensure that the transmission rope in the diffuser structure is always tensioned, thereby effectively driving each wheel group to synchronously rotate.

[0017] 3. In the utility model, one end of the transmission rope is locked and connected after passing through the driving wheel from one side, and the other end is locked and connected after passing through the tensioning wheel and then passing through each driven wheel and tensioning wheel and returning to the other side of the driving wheel. In this way, the transmission rope can correctly transmit power, and the tensioning of the transmission rope is more reasonable.

[0018] 4. In the utility model, the positioning block is further arranged on the driving wheel, the first end of the transmission rope passes through the positioning block after passing through the driving wheel from one side, a tail end stud is arranged on the first end of the transmission rope, and the tail end stud is locked by the tail end nut after passing through the positioning block; the second end of the transmission rope returns to the other side of the driving wheel, a tail end stud is also arranged on the second end of the transmission rope, and the tail end stud is locked by the tail end nut after passing through the positioning block. In this way, the assembly mode of the transmission rope is more reasonably arranged, the firmness of the diffuser structure after assembly is strengthened, and the reliability of the operation of the diffuser structure is increased.

[0019] 5. In the utility model, one or more transmission wheels are arranged between the driving wheel and the driven wheel and between each driven wheel, so that the position layout of each adjusting wheel group can be more reasonable.

[0020] 6. In the utility model, the driving wheel, the driven wheel are connected with the casing through the mounting post, and the rotating bushing is arranged between the mounting post and the driving wheel, the driven wheel; the mounting post tail end is provided with the gasket, the lock nut; the tension pulley is connected with the casing through the shoulder bolt, and the copper bushing is arranged in the driven wheel, the tension pulley. With the expansion device structure, the assembly of the driving wheel, the driven wheel, the tension pulley is more reasonable, and the stability of the driving wheel, the driven wheel, the tension pulley in the expansion device structure is increased in subsequent use.

[0021] 7. In the utility model, the driven wheel is provided with the notch, and the positioning column for ensuring the driven wheel to follow the rotation is arranged on the transmission rope corresponding to the notch, the positioning column is assembled in the notch after the transmission rope is wound on the driven wheel, so that the design can ensure that the driven wheel cannot be effectively driven due to slipping between the transmission rope, and the positioning column can be selected as the cylinder which is coaxially fixed on the transmission rope, so that the frictional force transmission of the traditional transmission rope is changed into flexible traction transmission, and the stability is more stable and reliable.

[0022] 8. In the utility model, the tail end of the connecting rod is provided with the positioning pin for preventing the sliding block from falling out, so as to ensure the reliability and stability of the structure in operation.

[0023] 9. In the utility model, the number of the adjusting wheel groups is three, the three adjusting wheel groups are arranged on the casing in a central symmetrical and uniform distribution, and two transmission wheels are arranged between each adjusting wheel group, which is the preferred scheme, the number of the adjusting wheel groups is more reasonable, the cost is low, two transmission wheels are arranged between each adjusting wheel group, so as to increase the stability of the transmission rope transmission, and the structure layout is more optimized.

[0024] 10. In the utility model, the transmission rope adopts the steel wire rope, has good wear resistance, small elongation rate and long service life, and the utility model is not limited thereto, and specifically, stainless steel wire rope, galvanized steel wire rope, copper wire rope and the like can also be used.

[0025] 11. In the utility model, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements, unless otherwise specified. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0026] 12. In the utility model, the terms "center", "upper", "lower", "axial", "bottom", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position assembly relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] 13. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0028] Due to the use of the above-mentioned scheme, the utility model has the following advantages and effects compared with the prior art:

[0029] 1. In the above-mentioned scheme of the utility model, in view of the problems of high requirement, high cost and large processing difficulty of the spiral groove on the outer circular surface of the driving ring existing in the structure of the variable expansion width, the compressor width variable expansion device structure with adjusting wheel group, adjusting rod group and transmission assembly is innovatively designed, and the compressor using the expansion device structure is innovatively designed, in the expansion device structure, a plurality of adjusting wheel groups are connected with the shell through mounting columns, each adjusting rod group is connected with the corresponding adjusting wheel group, the push rod in the adjusting rod group is connected with the expansion ring through the guide hole on the shell, and the expansion ring is reciprocated by the push rod to adjust the width gap of the expansion ring.

[0030] 2. In the above-mentioned scheme of the utility model, the corresponding wheel body is driven to rotate by the rotation driving unit through the main drive shaft, all wheel bodies and transmission wheels are driven to rotate synchronously by the transmission rope, the rotation block is driven to rotate by the wheel body synchronously, the sliding block in the sliding groove is driven to slide, the connecting rod, the push rod and the expansion ring connected with the push rod are driven to move, the structure is simple to assemble, low in cost, high in stroke accuracy, small in mechanical error, long in service life after aging test, the adjusting wheel group, the adjusting rod group and the transmission assembly are almost not damaged in the service life cycle of the compressor, and the maintenance and repair cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] ATTACHMENT Figure 1 It is a schematic view of the embodiment of the utility model;

[0032] ATTACHMENT Figure 2 It is an enlarged view of A in the attached Figure 1

[0033] ATTACHMENT​Figure 3 For the appendix Figure 1 Enlarged view of point B;

[0034] Appendix Figure 4 This is a front view of an embodiment of the present utility model;

[0035] Appendix Figure 5 This is a partial cross-sectional view (a) of an embodiment of the present utility model;

[0036] Appendix Figure 6 This is a partial cross-sectional view (II) of an embodiment of the present utility model.

[0037] The parts shown in the above attached diagram are illustrated below:

[0038] 1. Adjusting wheel assembly;

[0039] 11. Wheel body; 111. Driving wheel; 112. Driven wheel; 1121. Groove; 113. Tensioner wheel;

[0040] 12. Rotating block; 121. Slide groove;

[0041] 13. Mounting post; 131. Rotating bushing; 14. Positioning block; 15. Tail end nut; 16. Washer; 17. Locking nut; 18. Shoulder bolt; 19. Brass bushing;

[0042] 2. Adjusting rod assembly;

[0043] 21. Slider; 22. Connecting rod; 221. Locating pin; 23. Push rod;

[0044] 3. Transmission components;

[0045] 31. Drive wheel; 32. Drive rope; 321. Tail end stud; 322. Positioning pin;

[0046] 4. Main drive shaft;

[0047] 8. Housing; 81. Guide hole;

[0048] 9. Diffuser ring. Detailed Implementation

[0049] The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the embodiments of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0050] This utility model aims to solve the problems of existing variable diffuser width structures, such as the very high requirements for the spiral groove on the outer circumference of the drive ring, high cost, and high processing difficulty. It innovatively designs a compressor width variable diffuser structure with an adjusting wheel group 1, an adjusting rod group 2, and a transmission component 3, as well as a compressor using this diffuser structure. This structure is easy to assemble, low in cost, and has high stroke accuracy and small mechanical error.

[0051] Example 1, as Figures 1 to 6 As shown, Embodiment 1 of this utility model discloses a compressor width variable diffuser structure. The diffuser structure is used in a compressor. The compressor includes a housing 8 and a diffuser ring 9. The diffuser structure includes an adjusting wheel group 1, an adjusting rod group 2, and a transmission assembly 3.

[0052] Multiple adjusting wheel sets 1 are connected to the housing 8 via mounting posts 13. Each adjusting wheel set 1 has a wheel body 11 and a rotating block 12. The rotating block 12 rotates synchronously with the wheel body 11, and a sliding groove 121 is provided in the rotating block 12.

[0053] Each of the adjusting rod groups 2 is connected to its respective adjusting wheel group 1. Each adjusting rod group 2 has a slider 21, a connecting rod 22, and a pushing rod 23. The slider 21 is movably installed in the slide groove 121. One end of the connecting rod 22 is rotatably connected to the slider 21, and the other end is connected to the pushing rod 23. The pushing rod 23 passes through the guide hole 81 on the housing 8 and is connected to the diffuser ring 9.

[0054] The transmission assembly 3 includes a transmission wheel 31 and a transmission rope 32. One or more of the transmission wheels 31 are selectively arranged between each of the adjusting wheel groups 1. The transmission rope 32 is wound around all the wheel bodies 11 and the transmission wheels 31 to achieve synchronous rotation.

[0055] One of the wheel bodies 11 in each of the adjustment wheel sets 1 is connected to the main drive shaft 4. The main drive shaft 4 is connected to a rotary drive unit (not shown in the figure). The rotary drive unit drives the corresponding wheel body 11 to rotate through the main drive shaft 4, and drives all the wheel bodies 11 and the transmission wheel 31 to rotate synchronously. The wheel body 11 drives the rotating block 12 to rotate synchronously, and then drives the slider 21 in the slide groove 121 to slide. The slider 21 drives the connecting rod 22, the push rod 23 and the diffuser ring 9 connected to the push rod 23 to move.

[0056] Through the implementation of the embodiment one of the utility model, in the diffuser structure, a plurality of the adjusting wheel group 1 is connected with the shell 8 through the mounting column 13, each adjusting lever group 2 is connected with the corresponding adjusting wheel group 1, the push rod 23 in adjusting lever group 2 is connected with the diffuser ring 9 after passing through the guide hole 81 on the shell 8, the diffuser ring 9 is reciprocated by the push rod 23 to adjust the width gap of the diffuser ring 9, specifically, the corresponding wheel body 11 is driven to rotate by the main drive shaft 4 through the rotary drive unit, all wheel bodies 11 and transmission wheels 31 are synchronously rotated by the transmission rope 32, the rotary block 12 is synchronously rotated by the wheel body 11 to drive the sliding block 21 in the sliding groove 121 to slide, the sliding block 21 drives the connecting rod 22, the push rod 23 and the diffuser ring 9 connected with the push rod 23 to move, and the width of the airflow outlet is adjusted once, the movement direction of the diffuser ring 9 can be referred to the arrow direction shown in the figure. Figure 5 The transmission rope 32 is locked and connected after passing through the driving wheel 111 from one side, and the other end of the transmission rope 32 passes through the tensioning wheel 113 and then passes through each driven wheel 112 and the tensioning wheel 113 and returns to the other side of the driving wheel 111, and is also locked and connected.

[0057] In another way of the embodiment one of the utility model, the wheel body 11 connected with the main drive shaft 4 is defined as the driving wheel 111, and the other wheel bodies 11 are defined as the driven wheels 112, and the tensioning wheel 113 is arranged on one side of the driving wheel 111 to ensure that the transmission rope 32 in the diffuser structure is always tensioned, thereby effectively driving each wheel group to synchronously rotate.

[0058] In one way of the embodiment one of the utility model, one end of the transmission rope 32 is locked and connected after passing through the driving wheel 111 from one side, and the other end of the transmission rope 32 passes through the tensioning wheel 113 and then passes through each driven wheel 112 and the tensioning wheel 113 and returns to the other side of the driving wheel 111, and is also locked and connected.

[0059] More specifically, as shown in the figure, the driving wheel 111 is further provided with the positioning block 14, the first end of the transmission rope 32 passes through the positioning block 14 after passing through the driving wheel 111 from one side, and the tail end stud 321 is arranged at the first end of the transmission rope 32, the tail end stud 321 passes through the positioning block 14 and is locked by the tail end nut 15; the second end of the transmission rope 32 returns to the other side of the driving wheel 111, and the tail end stud 321 is also arranged at the second end of the transmission rope 32, the tail end stud 321 passes through the positioning block 14 and is locked by the tail end nut 15. Figure 2 In another way of the embodiment one of the utility model, as shown in the figure,

[0060] Figure 5 ​As shown, the driving wheel 111 and the driven wheel 112 are connected with the shell 8 through the mounting column 13, and a rotating bushing 131 is arranged between the mounting column 13 and the driving wheel 111 and the driven wheel 112; the tail end of the mounting column 13 is provided with a gasket 16 and a locking nut 17; as shown Figure 6 As shown, the tensioning wheel 113 is connected with the shell 8 through a shoulder bolt 18, and the driven wheel 112 and the tensioning wheel 113 are internally provided with copper bushings 19, so that the assembly of the driving wheel 111, the driven wheel 112 and the tensioning wheel 113 in the diffuser structure is more reasonable, and the stability of the driving wheel 111, the driven wheel 112 and the tensioning wheel 113 in the diffuser structure during subsequent use is increased.

[0061] In another mode of the embodiment one of the utility model, as shown, Figure 3 As shown, the driven wheel 112 is provided with a notch 1121, and a positioning column 322 for ensuring the follow-up rotation of the driven wheel 112 is arranged on the transmission rope 32 corresponding to the notch 1121; the positioning column 322 is assembled in the notch 1121 after the transmission rope 32 is wound on the driven wheel 112, so that the design can ensure that the driven wheel 112 cannot be effectively driven due to slipping between the driven wheel 112 and the transmission rope 32, and the positioning column 322 can be selected as a cylindrical body which is coaxially fixed on the transmission rope 32, so as to change the frictional force transmission of the traditional transmission rope 32 into flexible traction transmission, which is more stable and reliable.

[0062] In one mode of the embodiment one of the utility model, the tail end of the connecting rod 22 is provided with a positioning pin 221 for preventing the sliding block 21 from falling out, so as to ensure the reliability and stability of the structure during operation.

[0063] In another mode of the embodiment one of the utility model, as shown, Figure 4 As shown, the number of the adjusting wheel groups 1 is three, and the three adjusting wheel groups 1 are arranged in a central symmetry and are uniformly arranged around the shell 8, and two transmission wheels 31 are arranged between each adjusting wheel group 1, which is a preferred scheme; the number of the adjusting wheel groups 1 is more reasonable, and the cost is low; two transmission wheels 31 are arranged between each adjusting wheel group 1, so as to increase the stability of the transmission of the transmission rope 32, and the structural layout is more optimized.

[0064] In another mode of the embodiment one of the utility model, the transmission rope 32 adopts a steel wire rope which has good wear resistance, small elongation and long service life, and can also adopt a stainless steel wire rope, a galvanized steel wire rope, a copper wire rope and the like, and the utility model is not limited thereto.

[0065] In the embodiment two, the utility model discloses a compressor, which comprises a shell 8, a diffuser ring 9 and a compressor width variable diffuser structure as described in the embodiment one of the utility model.

[0066] The compressor width variable diffuser structure is used in the compressor, low cost, long service life, and easy maintenance.

[0067] The content of the utility model will be described in more detail below with a more specific detailed embodiment.

[0068] In the detailed embodiment, a compressor is provided, the compressor comprising a shell 8, a diffuser ring 9, a diffuser structure, the shell 8 being provided with a guide hole 81, the diffuser structure comprising an adjusting wheel set 1, an adjusting rod set 2, and a transmission assembly 3.

[0069] The number of the adjusting wheel set 1 is three, the three adjusting wheel sets 1 are arranged in a central symmetric and uniform manner around the shell 8, the adjusting wheel set 1 has a wheel body 11 and a rotating block 12, one of the wheel bodies 11 in each adjusting wheel set 1 is connected with a main drive shaft 4, the wheel body 11 connected with the main drive shaft 4 is defined as a driving wheel 111, and the other wheel bodies 11 are defined as driven wheels 112, a tension wheel 113 is arranged on one side of the driving wheel 111, the rotating block 12 rotates synchronously with the wheel body 11, and a sliding groove 121 is arranged in the rotating block 12. A positioning block 14 is further arranged on the driving wheel 111; the driving wheel 111 and the driven wheels 112 are connected with the shell 8 through mounting columns 13, and a rotating bushing 131 is arranged between the mounting column 13 and the driving wheel 111 and the driven wheels 112; a gasket 16 and a locking nut 17 are arranged at the tail end of the mounting column 13; the tension wheel 113 is connected with the shell 8 through a shoulder bolt 18, and a copper bushing 19 is arranged in the driven wheel 112 and the tension wheel 113. A notch 1121 is formed in the driven wheel 112.

[0070] The transmission assembly 3 comprises a transmission wheel 31 and a transmission rope 32, two transmission wheels 31 are arranged between each adjusting wheel set 1, and the transmission rope 32 is a steel wire rope. A positioning column 322 for ensuring the following rotation of the driven wheel 112 is arranged on the transmission rope 32 corresponding to the notch 1121, and the positioning column 322 is assembled in the notch 1121 after the transmission rope 32 is wound around the driven wheel 112. The first end of the transmission rope 32 passes through the positioning block 14 after winding around the driving wheel 111 from one side, and a tail end stud 321 is arranged at the first end of the transmission rope 32, and the tail end stud 321 is locked by a tail end nut 15 after passing through the positioning block 14; the second end of the transmission rope 32 returns to the other side of the driving wheel 111, and a tail end stud 321 is also arranged at the second end of the transmission rope 32, and the tail end stud 321 is locked by a tail end nut 15 after passing through the positioning block 14.

[0071] Each of the adjusting rod groups 2 is connected with the respective adjusting wheel group 1, and each of the adjusting rod groups 2 has a sliding block 21, a connecting rod 22 and a pushing rod 23, the sliding block 21 is movably installed in the sliding groove 121, one end of the connecting rod 22 is rotationally connected with the sliding block 21, the other end of the connecting rod 22 is connected with the pushing rod 23, the pushing rod 23 passes through a guide hole 81 on the shell 8 and is connected with the diffuser ring 9, and a positioning pin 221 for preventing the sliding block 21 from falling out is installed at the tail end of the connecting rod 22.

[0072] The operation principle of the detailed embodiment can refer to the following:

[0073] The rotating driving unit (rotary motor) works to drive the corresponding driving wheel 111 to rotate through the main driving shaft 4. The driving wheel 111 rotates, the rotating block 12 synchronously rotates to drive the sliding block 21 in the sliding groove 121 to slide, the sliding block 21 drives the pushing rod 23 at one end of the connecting rod 22 to start to act, so as to push the diffuser ring 9. At the same time, the transmission rope 32 (steel wire rope) is pulled tight to act, to drive the driven wheel 112 to synchronously rotate, the rotating block 12 on the driven wheel 112 synchronously drives the sliding block 21 in the sliding groove 121 to slide, and the pushing rod 23 matched with the driven wheel 112 is used to repeatedly push the diffuser ring 9.

[0074] The above embodiment is only for describing the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and it cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A compressor variable width diffuser structure, the diffuser structure is used in a compressor, the compressor comprises a casing (8), a diffuser ring (9), characterized in that: the diffuser structure comprises an adjusting wheel set (1), an adjusting rod set (2), a transmission assembly (3); a plurality of the adjusting wheel sets (1) are connected with the casing (8) through mounting columns (13), the adjusting wheel set (1) has a wheel body (11) and a rotating block (12), the rotating block (12) rotates synchronously with the wheel body (11), and a sliding groove (121) is arranged in the rotating block (12); each adjusting rod set (2) is connected with the corresponding adjusting wheel set (1), the adjusting rod set (2) has a sliding block (21), a connecting rod (22) and a pushing rod (23), the sliding block (21) is movably mounted in the sliding groove (121), one end of the connecting rod (22) is rotatably connected with the sliding block (21), the other end is connected with the pushing rod (23), and the pushing rod (23) passes through a guide hole (81) on the casing (8) and is connected with the diffuser ring (9); the transmission assembly (3) comprises a transmission wheel (31) and a transmission rope (32), one or more transmission wheels (31) are selectively arranged between each adjusting wheel set (1), and the transmission rope (32) is arranged around all wheel bodies (11) and transmission wheels (31) to realize synchronous rotation; one of the wheel bodies (11) in each adjusting wheel set (1) is connected with a main drive shaft (4), the main drive shaft (4) is connected with a rotating drive unit, the corresponding wheel body (11) is driven to rotate by the rotating drive unit through the main drive shaft (4), all wheel bodies (11) and transmission wheels (31) are driven to rotate synchronously by the transmission rope (32), the rotating block (12) is driven to rotate by the wheel body (11) synchronously, and the sliding block (21) in the sliding groove (121) is driven to slide, the connecting rod (22) and the pushing rod (23) are driven to move, and the diffuser ring (9) connected with the pushing rod (23) is driven to move.

2. A compressor variable width diffuser structure according to claim 1, characterized in that: The wheel body (11) connected with the main drive shaft (4) is defined as a driving wheel (111), and the other wheel bodies (11) are defined as driven wheels (112), and a tension wheel (113) is arranged on one side of the driving wheel (111).

3. A compressor variable width diffuser structure according to claim 2, characterized in that: One end of the transmission rope (32) is locked and connected after passing through the driving wheel (111) from one side, the other end is locked and connected after passing through the tension wheel (113) and then passing through each driven wheel (112) and tension wheel (113) and returning to the other side of the driving wheel (111).

4. A compressor variable width diffuser structure according to claim 3, characterized in that: The driving wheel (111) is further provided with a positioning block (14), the first end of the transmission rope (32) passes through the positioning block (14) after winding around the driving wheel (111) from one side, and a tail end stud (321) is arranged at the first end of the transmission rope (32), the tail end stud (321) is locked by a tail end nut (15) after passing through the positioning block (14); the second end of the transmission rope (32) returns to the other side of the driving wheel (111), and a tail end stud (321) is also arranged at the second end of the transmission rope (32), the tail end stud (321) is locked by a tail end nut (15) after passing through the positioning block (14).

5. A compressor width variable diffuser structure according to claim 2, characterized in that: The driving wheel (111) and the driven wheel (112) are connected with the shell (8) through mounting columns (13), and rotary bushings (131) are arranged between the mounting columns (13) and the driving wheel (111) and the driven wheel (112); gaskets (16) and locking nuts (17) are arranged at the tail ends of the mounting columns (13); the tensioning wheel (113) is connected with the shell (8) through shoulder bolts (18), and copper bushings (19) are arranged in the driven wheel (112) and the tensioning wheel (113).

6. A variable compressor width diffuser structure according to any one of claims 2 to 5, characterised in that: The driven wheel (112) is provided with a notch (1121), and a positioning column (322) for ensuring the following rotation of the driven wheel (112) is arranged on the transmission rope (32) corresponding to the notch (1121), and the positioning column (322) is assembled in the notch (1121) after the transmission rope (32) is wound around the driven wheel (112).

7. A variable compressor width diffuser structure according to claim 1, wherein: The tail end of the connecting rod (22) is provided with a positioning pin (221) for preventing the sliding block (21) from falling out.

8. A variable compressor width diffuser structure according to claim 1, wherein: The number of the adjusting wheel groups (1) is three, the three adjusting wheel groups (1) are arranged in a central symmetric and uniform distribution around the shell (8), and two transmission wheels (31) are arranged between each adjusting wheel group (1).

9. A variable compressor width diffuser structure according to claim 1, wherein: The transmission rope (32) is a steel wire rope.

10. A compressor characterized by: The compressor comprises a shell (8), a diffuser ring (9), and a compressor width variable diffuser structure as claimed in any one of claims 1 to 9 arranged between the shell (8) and the diffuser ring (9).

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