CN117847012A

CN117847012A - Compressor blade diffuser with adjustable blade form

Info

Publication number: CN117847012A
Application number: CN202311752256.3A
Authority: CN
Inventors: 马泽群; 林涛; 杨星; 陈坤毅; 陈杨; 翟斌
Original assignee: China Shipbuilding Corp System Engineering Research Institute
Current assignee: China Shipbuilding Corp System Engineering Research Institute
Priority date: 2023-12-19
Filing date: 2023-12-19
Publication date: 2024-04-09

Abstract

The application relates to a blade form adjustable compressor blade diffuser, including the intake pipe, the one end fixedly connected with diffuser rim of intake pipe, the one end fixedly connected with diffuser wheel hub of diffuser rim deviating from the intake pipe leaves diffuser airflow outlet between diffuser rim and the diffuser wheel hub, still including the fixed plate, fixedly connected with blade on the fixed plate, the blade sets up a plurality of along the circumference of fixed plate, the outside of fixed plate is provided with drive assembly, drive assembly drives the fixed plate and removes along the axis of fixed plate, the blade is located the inside of diffuser airflow outlet, diffuser wheel hub has seted up for the position of blade with the diffuser rim and has been dodged the hole, the inside of intake pipe is provided with the subassembly that admits air. The diffuser blade form has the effects of enabling the diffuser blade form to have a high maximum pressure ratio, a wide stable operation range and low aerodynamic noise.

Description

Compressor blade diffuser with adjustable blade form

Technical Field

The present application relates to the field of engine boosting systems, and more particularly to a vane-type adjustable compressor vane diffuser.

Background

In recent years, as the requirements of the marine turbocharger on dynamic property and economy are higher and higher, the centrifugal compressor gradually develops towards the direction of high pressure ratio, and the stable operation range and aerodynamic noise performance of the centrifugal compressor can be deteriorated along with the increase of the pressure ratio, which limits the application of the centrifugal compressor with high pressure ratio to a great extent. In order to widen the stable operating range of the compressor under the working condition of high pressure ratio, diffuser blades in various forms are applied to the compressor of the turbocharger. The blade of the vaneless diffuser is divided into full-height blades and half-height blades, and various forms such as slotted blades are developed in recent years.

The compressor adopting the vaneless diffuser generally has a wider stable operation range and lower aerodynamic noise, but has poorer aerodynamic performance, and the maximum pressure achieved is lower; the compressor adopting the vaned diffuser has the advantages of narrow stable operation range and high aerodynamic noise, but has good aerodynamic performance, and the maximum pressure can be achieved. In recent years, in order to make the compressor possess a higher maximum pressure ratio, a wider stable operation range and lower aerodynamic noise at the same time, a variety of different types of slotted vane diffusers have been proposed, in which the performance of the slotted vane diffuser is between a vaneless diffuser and a vaned diffuser, the greater the slot, the closer the performance of the slotted vane diffuser in each aspect is, and the smaller the slot, the closer the performance of the slotted vane diffuser in each aspect is.

With respect to the related art, the inventor considers that the existing diffuser vane form has difficulty in simultaneously having a high maximum pressure ratio, a wide stable operation range and low aerodynamic noise, which greatly limits the development of the marine turbocharger to a high pressure ratio and a large stable operation range.

Disclosure of Invention

In order to enable the diffuser blade form to simultaneously have a higher maximum pressure ratio, a wider stable operation range and lower aerodynamic noise, the application provides a blade form adjustable compressor blade diffuser.

The application provides a blade form adjustable compressor blade diffuser adopts following technical scheme:

the utility model provides a blade form adjustable compressor blade diffuser, includes the intake pipe, the one end fixedly connected with diffuser rim of intake pipe, the diffuser rim deviates from the one end fixedly connected with diffuser wheel hub of intake pipe, the diffuser rim with leave the diffuser air current export between the diffuser wheel hub, still including the fixed plate, fixedly connected with blade on the fixed plate, the blade is followed the circumference of fixed plate sets up a plurality of, the outside of fixed plate is provided with drive assembly, drive assembly drives the fixed plate is followed the axis of fixed plate removes, the blade is located the inside of diffuser air current export, diffuser wheel hub with the diffuser wheel rim has seted up for the position of blade dodges the hole, the inside of intake pipe is provided with air inlet assembly.

Optionally, the subassembly that admits air is including the pivot that the level set up, the lateral wall fixedly connected with impeller of pivot, the pivot with the coaxial setting of intake pipe, the impeller is followed the axis equidistance of pivot sets up a plurality ofly.

Optionally, two adjacent vanes and the diffuser airflow outlet form a diffuser runner, and the diffuser runner is relatively communicated with the inside of the air inlet pipe.

Optionally, the blade slope sets up, just the blade is close to the leading edge fluting has been seted up to one side at fixed plate center, leading edge fluting will the blade part runs through, the blade including the blade trailing edge and with the blade leading edge that the leading edge fluting formed.

Optionally, the leading edge slot is located on a side proximate to the diffuser hub.

Optionally, the leading edge slot is located on a side proximate to the diffuser rim.

Optionally, the diffuser hub has seted up first hole of dodging for the position of blade, the diffuser rim has seted up the second hole of dodging for the position of blade, the blade is close to diffuser hub's one end is located the inner wall and the relative sliding connection in first hole of dodging, the blade is close to the one end of diffuser rim is located in the second hole of dodging and relative sliding connection.

Optionally, when the driving assembly drives the fixed plate to move towards one side close to the diffuser hub, the front edge slot of the blade is located in the diffuser airflow channel, and when the driving assembly drives the fixed plate to move towards one side close to the diffuser rim, the front edge of the blade is completely located in the second avoidance hole.

Optionally, the fixed plate sets up a plurality of relatively level, and is a plurality of all install on the fixed plate the blade, drive assembly drives a plurality of the fixed plate is followed the axis of fixed plate removes, a plurality of on the fixed plate the blade is crisscross to be set up.

Optionally, the drive assembly is including the screw rod that the level set up, the one end of screw rod is provided with the drive the screw rod pivoted driving piece, the screw rod with fixed plate threaded connection.

In summary, the present application includes at least one of the following beneficial technical effects:

according to the method, the diffuser blades which are generally fixed are changed, the diffuser blades are fixed on the fixing plates instead of being fixed on the diffuser hub or the diffuser rim, the diffuser blade forms can be adjusted by axially moving the diffuser blade fixing plates through the control assembly, and particularly, two gears are arranged, wherein one gear is that the fixing plates are close to the diffuser rim, when the control assembly monitors that the compressor works in a low-flow near-stall state, the diffuser is in a first gear state, at the moment, the front edge grooves of the diffuser blades close to the grooves on one side of the diffuser rim are completely exposed in the diffuser flow channel, and dynamic and static interference of an impeller airflow outlet and an airflow inlet of the diffuser can be greatly reduced, so that the compressor has a wider stable operation range at a low flow position; the second gear is that the fixed plate moves along the axial and leaves the diffuser rim, and when the control system monitors that the compressor works under stable high-efficiency and high-pressure ratio working conditions, the diffuser can be in the second gear state, and at the moment, the diffuser blades pass through the diffuser hub and holes in the diffuser rim and move along the axial direction along with the diffuser blade fixed plate, and at the moment, front edge slots of the diffuser blades close to one side of the diffuser rim are hidden in the holes of the diffuser rim, and the diffuser blades left in the diffuser runner are full-height blades, so that dynamic and static interference at an impeller airflow outlet and a diffuser airflow inlet is aggravated, but the performance of the diffuser is improved, and the compressor has a larger pressure ratio.

Drawings

FIG. 1 is a schematic illustration of the overall construction of a vane-type adjustable compressor vane diffuser in accordance with an embodiment of the present application.

FIG. 2 is a cross-sectional view of a vane-form adjustable compressor vane diffuser in accordance with an embodiment of the present application.

FIG. 3 is a schematic illustration of a vane-form adjustable compressor vane diffuser in accordance with an embodiment of the present application in a fixed plate and vane position configuration.

FIG. 4 is a schematic illustration of a vane-type adjustable compressor vane diffuser in a first stage configuration in accordance with an embodiment of the present application.

FIG. 5 is a schematic illustration of a two-stage configuration of a vane-type adjustable compressor vane diffuser in accordance with an embodiment of the present application.

Reference numerals illustrate: 1. an air inlet pipe; 2. an air intake assembly; 21. a rotating shaft; 22. an impeller; 3. a diffuser rim; 31. a second avoidance hole; 4. a diffuser hub; 41. a first avoidance hole; 5. a diffuser airflow outlet; 6. a fixing plate; 7. a control assembly; 8. a blade; 81. slotting the front edge; 82. a blade leading edge; 83. blade trailing edge.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses a compressor blade diffuser with an adjustable blade form. Referring to fig. 1 and 2, a vane-type adjustable compressor vane diffuser includes an intake pipe 1, an intake assembly 2 is disposed in the intake pipe 1, and the intake assembly 2 can draw in external gas into the intake pipe 1. The end part of the air inlet pipe 1 is fixedly connected with a diffuser rim 3, one end of the diffuser rim 3, which is away from the air inlet pipe 1, is provided with a diffuser hub 4, and the diffuser rim 3, the diffuser hub 4 and the air inlet pipe 1 are coaxially arranged. A space is left between the diffuser rim 3 and the diffuser hub 4, forming a diffuser airflow outlet 5, so that the gas entering the interior of the inlet pipe 1 through the inlet assembly 2 can be discharged through the position of the diffuser airflow outlet 5.

The air inlet assembly 2 comprises a rotating shaft 21 which is horizontally arranged, the rotating shaft 21 and the air inlet pipe 1 are coaxially arranged, an impeller 22 is fixedly connected to the outer side of the rotating shaft 21, the impeller 22 and the rotating shaft 21 are coaxially arranged, the side wall of the impeller 22 is not in contact with other structures, and a gap between the impellers 22 is an impeller 22 runner.

In one embodiment, a fixing plate 6 is vertically arranged on one side of the diffuser rim 3, which faces away from the diffuser hub 4, the fixing plate 6 is of a circular ring structure, the fixing plate 6 and the air inlet pipe 1 are coaxially arranged, and the fixing plate 6 is located on the outer side wall of the diffuser rim 3 and can move along the axial direction of the fixing plate.

In one embodiment, the mounting plate 6 is located on a side of the diffuser hub 4 facing away from the diffuser rim 3, and the location of the mounting plate 6 is selected to facilitate installation by an operator according to different structural installation configurations.

The outside that is located fixed plate 6 is provided with control assembly 7, and control assembly 7 can control fixed plate 6 to remove along its axis direction, and in one embodiment, control assembly 7 can be the screw rod that the level set up, and the axis of screw rod is parallel with the axis of intake pipe 1, rotates between screw rod and the diffuser rim 3 to be connected, threaded connection between screw rod and the fixed plate 6. One end of the screw is provided with a driving piece for driving the screw to rotate, and the driving piece drives the screw to rotate so as to drive the fixing plate 6 to move along the axis direction of the screw. In one embodiment, the control assembly 7 may also be a steering engine, which is mounted on the outer side of the diffuser rim 3 and drives the fixing plate 6 to move along the axial direction thereof.

Referring to fig. 2 and 3, the fixing plate 6 is fixedly connected with blades 8 inside the diffuser airflow outlet 5, the blades 8 are equidistantly arranged along the circumferential direction of the fixing plate 6, and gaps are reserved among the blades 8 to form a diffuser flow passage, so that gas can be discharged from the position of the diffuser flow passage.

The plurality of blades 8 are inclined, and the inclination angles are the same, and the front edge slot 81 is formed at one end of the blade 8 near the center of the fixed plate 6, and in one embodiment, the front edge slot 81 may be located near the side of the fixed plate 6, and in another embodiment, the front edge slot 81 may be located on the side away from the fixed plate 6. In another embodiment, the blade 8 is provided with a leading edge slot 81 on both the side near the center of the fixed plate 6 and the side away from the center of the fixed plate 6. In another embodiment, the blade 8 may be provided with a structure that does not include the leading edge slot 81.

The blade 8 is formed with a blade leading edge 82 opposite the leading edge slot 81 and a full blade trailing edge 83 by the leading edge slot 81. The first avoidance hole 41 is horizontally formed in the side wall of the diffuser hub 4 relative to the position of the blade 8, one end, close to the first avoidance hole 41, of the blade 8 extends into the first avoidance hole 41, and the blade 8 is located in the first avoidance hole 41 and is in relative sliding connection. The second avoidance holes 31 are horizontally formed in the side wall of the diffuser rim 3 relative to the positions of the blades 8, one ends of the blades 8, which are close to the second avoidance holes 31, extend into the second avoidance holes 31, and the blades 8 are in relative sliding connection with the interiors of the second avoidance holes 31.

In one embodiment, the fixing plates 6 may be further disposed in a plurality of directions along the axis, the plurality of fixing plates 6 may be driven by the driving assembly to move along the axis, the fixing plates 6 are fixedly connected with the blades 8 at the positions of the diffuser airflow outlets 5, and the blades 8 on the plurality of fixing plates 6 are disposed in a staggered manner.

Referring to fig. 4 and 5, the driving assembly drives the fixed plate 6 to move along the axial direction of the fixed plate, so that the blade 8 on the fixed plate 6 has two gears. The first gear is that the fixed plate 6 of the diffuser blade 8 is close to the diffuser rim 3, when the control system monitors that the compressor works in a low-flow near-stall state, the diffuser is in a first gear state, and at the moment, the front edge slot 81 of the diffuser blade 8, which is near to the slot on one side of the diffuser rim 3, is completely exposed in the diffuser airflow outlet 5, so that dynamic and static interference at the airflow outlet of the impeller 22 and the airflow inlet of the diffuser is greatly reduced, and the compressor has a wider stable operation range at the low-flow position.

The second gear is that the fixed plate 6 of diffuser blade 8 moves along axial direction and leaves diffuser rim 3, when control system monitors that the compressor works in stable high efficiency, high pressure ratio operating mode, just can make the diffuser be in the second gear state just, the blade 8 of diffuser passes the first hole 41 of dodging and the second hole 31 of dodging on diffuser wheel hub 4 and the diffuser rim 3 and moves along axial direction along with diffuser blade 8 fixed plate 6 together, the leading edge fluting 81 of the diffuser blade 8 that is close to diffuser rim 3 one side at this moment hides in the second hole 31 of dodging of diffuser rim 3, the diffuser blade 8 that remains in the diffuser runner is full high blade 8, this has aggravated the sound interference of impeller 22 air current export and diffuser air current import department, but promoted the performance of diffuser simultaneously for the compressor has bigger pressure ratio.

In the present invention, the term "plurality" means at least two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. The utility model provides a blade form adjustable compressor blade diffuser, is including intake pipe (1), the one end fixedly connected with diffuser rim (3) of intake pipe (1), diffuser rim (3) deviate from one end fixedly connected with diffuser wheel hub (4) of intake pipe (1), diffuser rim (3) with leave diffuser air current export (5) between diffuser wheel hub (4), its characterized in that: still including fixed plate (6), fixedly connected with blade (8) on fixed plate (6), blade (8) are followed the circumference of fixed plate (6) sets up a plurality ofly, the outside of fixed plate (6) is provided with drive assembly, drive assembly drives fixed plate (6) are followed the axis of fixed plate (6) removes, blade (8) are located the inside of diffuser air current export (5), diffuser wheel hub (4) with diffuser rim (3) for dodge the hole for the position of blade (8) has been seted up, the inside of intake pipe (1) is provided with air intake assembly (2).

2. The adjustable vane version of a compressor vane diffuser of claim 1, wherein: the air inlet assembly (2) comprises a rotating shaft (21) which is horizontally arranged, an impeller (22) is fixedly connected to the side wall of the rotating shaft (21), the rotating shaft (21) and the air inlet pipe (1) are coaxially arranged, and a plurality of blades are arranged on the impeller (22).

3. The adjustable vane version of a compressor vane diffuser of claim 1, wherein: two adjacent blades (8) and the diffuser hub (4) and the diffuser rim (3) form a diffuser flow passage which is in opposite communication with the interior of the air inlet pipe (1).

4. The adjustable vane version of a compressor vane diffuser of claim 1, wherein: the blade (8) is obliquely arranged, a front edge slot (81) is formed in one side, close to the center of the fixing plate (6), of the blade (8), the front edge slot (81) is used for enabling the blade (8) to penetrate through partially, and the blade (8) comprises a tail edge of the blade (8) and a blade front edge (82) formed by the front edge slot (81).

5. The adjustable vane version of compressor vane diffuser of claim 4 wherein: the leading edge slot (81) is located on a side adjacent the diffuser hub (4).

6. The adjustable vane version of compressor vane diffuser of claim 4 wherein: the leading edge slot (81) is located on a side adjacent the diffuser rim (3).

7. The adjustable vane version of compressor vane diffuser of claim 4 wherein: the diffuser hub (4) is provided with a first avoidance hole (41) relative to the position of the blade (8), the diffuser rim (3) is provided with a second avoidance hole (31) relative to the position of the blade (8), one end of the blade (8) close to the diffuser hub (4) is located on the inner wall of the first avoidance hole (41) and is in relative sliding connection, and one end of the blade (8) close to the diffuser rim (3) is located in the second avoidance hole (31) and is in relative sliding connection.

8. The adjustable vane version of the compressor vane diffuser of claim 7, wherein: when the driving assembly drives the fixing plate (6) to move towards one side close to the diffuser hub (4), the blade front edge groove (81) is located in the diffuser runner, and when the driving assembly drives the fixing plate (6) to move towards one side close to the diffuser rim (3), the blade front edge groove (81) is completely located in the second avoidance hole (31).

9. The adjustable vane version of a compressor vane diffuser of claim 1, wherein: the fixed plate (6) is relatively horizontally provided with a plurality of blades (8), the fixed plate (6) is provided with a plurality of blades (8), the driving assembly drives the fixed plate (6) to move along the axis of the fixed plate (6), and the blades (8) on the fixed plate (6) are staggered.

10. The adjustable vane version of a compressor vane diffuser of claim 1, wherein: the driving assembly comprises a screw rod which is horizontally arranged, one end of the screw rod is provided with a driving piece which drives the screw rod to rotate, and the screw rod is in threaded connection with the fixing plate (6).