CN107701298A - Compressor and booster - Google Patents

Abstract

The purpose of the present invention is to provide a compressor and a supercharger, which can effectively suppress the fracture of the bolts fastening the frame adjacent to the scroll chamber frame and the scroll chamber frame, so that these frames can be stably combined, and the compressor (10 ) has: an impeller (14), the impeller (14) is used to compress air; an air guide cylinder (16), the air guide cylinder (16) is used to accommodate the impeller (14) and guide air; the vortex chamber frame (20) , the vortex chamber frame (20) is arranged adjacent to the air guide cylinder (16), forming a vortex chamber (18) for guiding the air passing through the air guide cylinder to the outside; the frame (22, 40), the The frame (22, 40) is arranged adjacent to the vortex chamber frame (20); bolts (25, 48), the bolts (25, 48) fasten the vortex chamber frame (20) and the frame (22, 40); And a bush (28) disposed between the head (26, 52) of the bolt (25, 48) and the scroll chamber frame (20).

Description

Compressor and Supercharger

This application is a divisional application of the following application:

Filing date of the original application: June 30, 2014

Application number of the original application: 201480041368.0

Invention title of the original application: compressor and supercharger

technical field

The invention relates to compressors and superchargers for internal combustion engines.

Background technique

Conventionally, as a supercharger for compressing air supplied to an internal combustion engine, a supercharger including a compressor including: an impeller for compressing air; an air guide cylinder for accommodating the impeller and guiding air; and a swirl chamber frame which is provided adjacent to the air guide cylinder and forms a swirl chamber for guiding the air passing through the air guide cylinder to the outside.

In the turbocharger described in Patent Document 1, when a part of the impeller bursts and is scattered outward, in order to prevent oil leakage from being damaged in the pressure tank for lubricating the lubricating oil for lubricating the radial sliding bearing, the diffusion chamber of the compressor and the Shock-absorbing partitions are provided between the pressure tanks.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2001-132465

However, if the impeller of the compressor constituting a part of the supercharger is broken, the impeller fragments may scatter outward in the radial direction of the impeller and may collide with the air guide tube, the frame around it, and the like. If the impeller fragments collide with the air guide cylinder, its surrounding frame, etc., there will be tensile stress on the bolts for fastening the frame of the scroll chamber adjacent to the air guide cylinder and the frame adjacent to the scroll chamber frame, and the Possibility of bolt breakage.

Regarding this point, although Patent Document 1 describes a structure that does not damage the lubricating oil pressure tank when a part of the impeller is scattered as described above, it does not disclose any problems related to the breakage of the above-mentioned bolts due to the scattering of the impeller and its solution.

Contents of the invention

The purpose of several embodiments of the present invention is to provide a compressor and a supercharger, which can effectively suppress the fracture of the bolts fastening the frame adjacent to the scroll chamber frame and the scroll chamber frame, and realize the stability of these frames. combined state.

means to solve the problem

Compressors according to several embodiments of the present invention,

(1) Equipped with: an impeller, which is used for compressing air;

an air guiding cylinder for housing the impeller and guiding the air;

a swirl chamber frame disposed adjacent to the air guide cylinder and forming a swirl chamber for guiding air passing through the air guide cylinder to the outside;

a first frame, the first frame is arranged adjacent to the vortex chamber frame;

a first bolt fastening the scroll chamber frame and the first frame; and

A bush, the bush is arranged between the head of the first bolt and the frame of the scroll chamber.

If the impeller is broken in the compressor, the impeller fragments may scatter outward in the radial direction of the impeller and may collide with the air guide tube, the frame around it, and the like. If the impeller debris collides with the air guide cylinder and its surrounding frame, tension will be generated on the first bolts for fastening the scroll chamber frame adjacent to the air guide cylinder and the first frame adjacent to the scroll chamber frame. Tensile stress, the possibility of breaking the first bolt.

In contrast, according to the compressor described in (1) above, since a bush is provided between the head portion of the first bolt and the scroll chamber frame, compared with the case where no bush is provided, it is possible to use the Fasten the scroll chamber frame and the first frame with the first bolt with a long length (the length of the neck). Therefore, when a tensile load in the axial direction is applied to the first bolt, the amount of elongation that can be extended can be increased without breaking the first bolt, compared to the case where the bush is not provided. Thereby, even if the above-mentioned tensile stress due to fracture of the impeller occurs in the first bolts fastening the scroll chamber frame and the first frame, the fracture of the first bolts can be effectively suppressed. That is, a stable coupling state between the scroll chamber frame and the first frame can be realized.

In addition, in order to manufacture the compressor described in (1) above, it is not necessary to repurchase all the structures, and it is only necessary to add the bushing and replace the first bolts to the existing compressor. That is, the compressor described in (1) above is also advantageous in terms of ease of production.

In addition, the "first frame" in the compressor described in (1) includes at least the muffler frame and the bearing frame described in the embodiment of the invention. Moreover, in the compressor as described in said (1), when a 1st bolt is a stud bolt, the head part of a 1st bolt means the nut used for a stud bolt.

In several embodiments, in the compressor described in (1) above,

(2) The bush is formed in a sleeve shape and provided so as to surround the shaft portion of the first bolt,

The inner diameter of the bush is smaller than the diameter of the head of the first bolt.

According to the compressor described in (2) above, the head of the first bolt can be evenly supported by the sleeve-shaped bush provided so as to surround the shaft portion of the first bolt. The tensile stress caused by the fracture of the impeller can also effectively suppress the fracture of the first bolt. Therefore, a stable coupling state between the swirl chamber frame and the first frame adjacent to the swirl chamber can be realized.

In several embodiments, in the compressor described in (1) or (2) above,

(3) A dimension of the bush in the axial direction of the first bolt is larger than a dimension of the bush in the radial direction of the first bolt.

As in the compressor described in (3) above, by using a bush suitable for increasing the length of the shaft portion of the first bolt, it is possible to prevent the first bolt from being distorted when an axial tensile load is applied to the first bolt. When the bolt breaks, the amount of elongation that can be elongated is easily increased.

Thereby, even if the above-mentioned tensile stress due to fracture of the impeller occurs in the first bolts fastening the scroll chamber frame and the first frame, the fracture of the first bolts can be effectively suppressed. Therefore, a stable coupling state between the swirl chamber frame and the first frame adjacent to the swirl chamber frame can be realized.

In several embodiments, in the compressor described in any one of the above (1) to (3),

(4) further comprising: a muffler for reducing the sound generated by the compressor,

The first frame is a frame of the muffler.

According to the compressor described in (4) above, even if the above-mentioned tensile stress caused by fracture of the impeller occurs in the first bolts fastening the frame of the muffler and the frame of the scroll chamber, the first bolt can be effectively suppressed. Breakage of bolts. Therefore, it is possible to effectively suppress the detachment of the muffler from the compressor.

In several embodiments, in the compressor described in any one of the above (1) to (4),

(5) equipped with: a second frame, the second frame is disposed adjacent to the vortex chamber frame;

a second bolt fastening the scroll chamber frame and the second frame; and

A clamp configured to clamp the scroll chamber frame and the second frame.

If the impeller breaks in the compressor, the impeller fragments may fly outward in the radial direction of the impeller and collide with the air guide tube, the scroll chamber frame, and the like. If the impeller fragments collide with the air guide cylinder, the swirl chamber frame, etc., tensile stress will be generated on the second bolts for fastening the second frame and the swirl chamber frame arranged adjacent to the swirl chamber frame, and the second Possibility of bolt breakage.

On the other hand, according to the compressor described in (5) above, by the clamp configured to sandwich the scroll chamber frame and the second frame, it is possible to suppress the generation of tensile stress on the second bolt and effectively suppress the breakage of the second bolt. . Therefore, a stable coupling state between the swirl chamber frame and the second frame adjacent to the swirl chamber frame can be realized.

In addition, the "second frame" in the compressor described in the above (5) includes at least the muffler frame and the bearing frame described in the embodiment of the invention.

In several embodiments, in the compressor described in (5) above,

(6) The second frame is a bearing frame provided with a bearing portion that pivotally supports the rotating shaft of the impeller.

According to the compressor described in (6) above, even if the tensile stress caused by the breakage of the impeller as described above occurs in the second bolts fastening the scroll chamber frame and the bearing frame, the breakage of the second bolts can be effectively suppressed. . Therefore, a stable coupling state of the scroll chamber frame and the bearing frame can be realized.

In several embodiments, in the compressor described in (6) above,

(7) The frame of the vortex chamber has:

a swirl chamber forming portion forming the swirl chamber; and

a flange portion extending radially outward of the impeller from the swirl chamber forming portion for coupling the swirl chamber frame to the bearing frame,

the second bolt fastens the flange portion and the bearing frame,

The clamp is configured to clamp the flange portion and the bearing frame.

In the structure where the flange portion extending from the swirl chamber forming portion to the radially outer side of the impeller is combined with the bearing frame, it is difficult to secure a space between the flange portion and the swirl chamber forming portion. In case of fracture, it is difficult to install a bushing between the head of the second bolt and the frame of the scroll chamber.

Even in such a case, according to the compressor described in (7) above, the occurrence of tensile stress on the second bolt can be suppressed by the clamp configured to clamp the scroll chamber frame and the bearing frame, and the tension of the second bolt can be effectively suppressed. of the break. Therefore, a stable coupling state of the scroll chamber frame and the bearing frame can be realized.

In several embodiments, in the compressor described in (7) above,

(8) The jig has a pressing bolt for pressing the bearing frame from a side opposite to the flange portion of the scroll chamber frame.

In the structure where the flange portion extending from the swirl chamber forming portion to the radially outer side of the impeller is combined with the bearing frame, it is difficult to secure a space between the flange portion and the swirl chamber forming portion. In case of fracture, it is difficult to install a bushing between the head of the second bolt and the frame of the scroll chamber.

Even in such a case, according to the compressor described in (8) above, if the pressing bolt that presses the bearing frame from the side opposite to the flange portion of the scroll chamber frame is provided, it can be suppressed with a simple structure. Tensile stress is generated in the second bolt, effectively suppressing the breakage of the second bolt. Therefore, a stable coupling state of the scroll chamber frame and the bearing frame can be realized with a simple structure.

(9) A supercharger according to some embodiments of the present invention includes the compressor described in any one of (1) to (8).

In the supercharger according to some embodiments of the present invention, even if tensile stress occurs due to fracture of the impeller, fracture of the first bolt can be effectively suppressed. That is, a stable coupling state between the scroll chamber frame and the first frame can be realized.

The effect of the invention

According to several embodiments of the present invention, it is possible to effectively suppress breakage of the bolts fastening the frame adjacent to the scroll chamber frame and the scroll chamber frame, and achieve a stable combined state of these frames.

Description of drawings

FIG. 1 is a schematic diagram showing the overall configuration of an internal combustion engine system according to some embodiments.

Fig. 2 is a schematic sectional view of a part of a supercharger according to some embodiments.

Fig. 3 is a schematic cross-sectional view around bolts fastening a scroll chamber frame and a muffler frame.

4 is a view showing a state in which a scroll chamber frame is deformed and tensile stress is generated in bolts fastening the scroll chamber frame and the bearing frame.

Fig. 5 is a view of a flange portion of a scroll chamber frame and a flange portion of a bearing frame viewed from the direction P in Fig. 2 .

Fig. 6 is a schematic cross-sectional view for explaining the structure of the jig of some embodiments.

Symbol Description

2 internal combustion engine

4 superchargers

6 turbo

8 generators

10 compressors

12 axis of rotation

13 silencer

14 impeller

16 Air guide barrel

17 wings

18 Vortex chamber

19 Vortex chamber forming part

20 Vortex chamber frame

22 muffler frame

23, 24, 29, 46 Flange

25, 48 bolts

26, 52 head

28 Bushing

30 Inclined part

31 Shaft

32 entrance

40 bearing frame

43 Export Department

44 Bearing

50 Diffusion Department

54 Fixtures

56 Press bolt

100 Internal combustion engine systems

d ₁ inner diameter

d ₂ diameter

d ₃ , d ₄ size

detailed description

Embodiments of the present invention will be described below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, and are merely illustrative examples.

FIG. 1 is a schematic diagram showing the overall configuration of an internal combustion engine system 100 according to some embodiments.

An internal combustion engine system 100 shown in FIG. 1 includes an internal combustion engine 2 , a supercharger 4 that pressurizes intake air to the internal combustion engine 2 , and a generator 8 driven by a turbine 6 included in the supercharger 4 .

Supercharger 4 shown in FIG. The driven turbine 6 and the muffler 13 for reducing the sound generated by the compressor 10 .

In the supercharger 4 shown in FIG. 1 , an exhaust turbine type supercharger (so-called turbocharger) in which the compressor 10 is driven by the turbine 6 driven by the exhaust gas of the internal combustion engine 2 is used. As the supercharger 4 in another embodiment, a mechanical supercharger (so-called supercharger) that drives the compressor 10 by power transmitted from the output shaft of the internal combustion engine 2 via a belt or the like may be used. In addition, as the internal combustion engine 2, for example, a diesel engine, a gasoline engine, or the like can be appropriately selected.

Next, a specific configuration example of the supercharger 4 will be described below with reference to FIG. 2 .

FIG. 2 is a schematic cross-sectional view of a part of the turbocharger 4 according to some embodiments.

The compressor 10 shown in FIG. 2 includes: an impeller 14 for compressing air, an air guide cylinder 16 for accommodating the impeller 14 and guiding air, a scroll chamber frame 20 and a bearing frame 40 . The impeller 14 includes a hub 15 and a plurality of wings 17 arranged around the hub 15 . The swirl chamber frame 20 is provided adjacent to the air guide cylinder 16 , and has a swirl chamber forming portion 19 forming the swirl chamber 18 for guiding the air passing through the air guide cylinder 16 to the outside. The bearing frame 40 is provided with a bearing portion 44 that pivotally supports the rotating shaft 12 of the impeller 14 .

The muffler 13 includes a muffler frame 22 provided adjacent to the swirl chamber frame 20 . The swirl chamber frame 20 and the muffler frame 22 are fastened by bolts 25 to the flange portion 23 of the swirl chamber frame 20 and the flange portion 24 of the muffler frame 22 . A bush 28 is provided between the head 26 of the bolt 25 and the scroll chamber frame 20 (see FIG. 3 ).

The bearing frame 40 and the scroll chamber frame 20 are fastened to the flange portion 46 of the bearing frame 40 and the flange portion 29 of the scroll chamber frame 20 by bolts 48 .

In the compressor 10 constituting a part of the supercharger 4 shown in FIG. 2 , if the impeller 14 breaks, the impeller fragments will fly outward in the radial direction of the impeller 14, and will interfere with the air guide cylinder 16, the scroll chamber frame 20, etc. Collision situation.

For example, if the impeller debris collides with the inclined portion 30 of the air guide cylinder 16, the inlet portion 32 of the air guide cylinder 16 moves toward the muffler 13 in the direction of arrow S (see FIG. The exit portion 43 of 22 collides. As a result, the flange portion 24 of the muffler frame 22 moves away from the flange portion 23 of the scroll chamber frame 20 , so tensile stress is generated in the bolt 25 .

Even when tensile stress is generated in the bolt 25 like this, according to the compressor 10 and the supercharger 4, since the bushing 28 is provided between the head 26 of the bolt 25 and the scroll chamber frame 20, it is different from not installing the bushing 28 . Compared with the case of the bushing 28, the swirl chamber frame 20 and the muffler frame 22 can be fastened using the bolt 25 having a longer length (neck length) of the shaft portion 31 (see FIG. 3 ). Therefore, when a tensile load in the axial direction is applied to the bolt 25, the amount of elongation that can be extended can be increased without breaking the bolt 25, compared to the case where the bush 28 is not provided. Thus, even if tensile stress due to breakage of the impeller 14 as described above occurs on the bolts 25 fastening the scroll chamber frame 20 and the muffler frame 22 , breakage of the bolts 25 can be effectively suppressed. Therefore, the scroll chamber frame 20 and the muffler frame 22 can be stably coupled, and the muffler 13 can be effectively suppressed from coming off from the supercharger 4 and the compressor 10 .

_{Bushing 28} shown in FIG. Therefore, since the heads 26 of the bolts 25 can be uniformly supported by the bushes 28 , even if tensile stress due to fracture of the impeller 14 occurs in the bolts 25 as described above, fracture of the bolts 25 can be effectively suppressed.

In addition, the dimension d3 of the bushing 28 in the axial direction of the bolt 25 shown in FIG. ₃ is larger than the dimension _d4 of the bushing 28 in the radial direction of the bolt 25 . In this way, by using the bush 28 suitable for increasing the length of the shaft portion 31 of the bolt 25 , when an axial tensile load is applied to the bolt 25 , the bolt 25 can be easily extended without breaking the bolt 25 . The elongation becomes larger. Thus, even if tensile stress due to breakage of the impeller 14 as described above occurs on the bolts 25 fastening the scroll chamber frame 20 and the muffler frame 22 , breakage of the bolts 25 can be effectively suppressed.

In FIG. 3 , an example in which tensile stress occurs in the bolts 25 fastening the vortex chamber frame 20 and the muffler frame 22 due to the fracture of the impeller 14 is illustrated, but there is a case where the fracture of the impeller 14 causes tension in the bolt 25 fastening the vortex chamber. The frame 20 and the bolts 48 of the bearing frame 40 produce tensile stress.

For example, when impeller fragments intrude into the diffuser 50 of FIG. 2 to clog the diffuser 50 , the impeller fragments cause the diffuser 50 to expand in the axial direction of the impeller 14 . As a result, the scroll chamber frame 20 and the bearing frame receive a force in a direction away from each other. As shown in FIG. 4 , the scroll chamber frame 20 is deformed and tensile stress is generated in the bolt 48 .

In order not to cause the bolt 48 to break due to the tensile stress, in several embodiments, it is also possible to arrange the bushing 28 described with reference to FIG. , so that the shaft portion 53 of the bolt 48 is longer than the structure shown in FIG. 4 . However, as shown in FIG. 2 , the flange portion 29 of the swirl chamber frame 20 is extended from the swirl chamber forming portion 19 to the radial direction outside of the impeller 14, so it is difficult to ensure that the flange portion 29 and the swirl chamber forming portion 19 Therefore, it is difficult to provide a bushing between the head 52 of the bolt 48 and the scroll chamber frame 20 in order to prevent the bolt 48 from breaking.

Therefore, the supercharger 4 and the compressor 10 shown in FIG. 2 have the clamp 54 shown in FIGS. 5 and 6 , and the clamp 54 is configured to clamp the scroll chamber frame 20 and the bearing frame 40 . 5 is a view of the flange portion 29 of the scroll chamber frame 20 and the flange portion 46 of the bearing frame 40 as viewed from the direction P in FIG. 2 , showing the arrangement of the bolts 48 and the clamps 54 . FIG. 6 is a schematic cross-sectional view for explaining the structure of the jig 54 .

In this way, by using the jig 54 configured to clamp the flange portion 29 of the scroll chamber frame 20 and the flange portion 46 of the bearing frame 40, even when it is difficult to secure a sufficient gap between the flange portion 29 and the flange portion 46, Also in the structure in which the space for the above-mentioned bush is provided between the scroll chamber forming portions 19, generation of tensile stress on the bolt 48 can be suppressed, and breakage of the bolt 48 can be effectively suppressed. Therefore, it is possible to stably couple the scroll chamber frame 20 and the bearing frame 40 .

The jig 54 shown in FIGS. 5 and 6 has a pressing bolt 56 that presses the bearing frame 40 from the side opposite to the flange portion 29 of the scroll chamber frame 20 . Thus, even if it is difficult to provide a bushing between the head portion 52 of the bolt 48 and the scroll chamber frame 20 as described above for the purpose of preventing the bolt 48 from breaking, it is possible to suppress the breakage of the bolt 48 with a simple structure. The generation of tensile stress can effectively suppress the breakage of the bolt 48 . Therefore, the scroll chamber frame 20 and the bearing frame 40 can be stably coupled with a simple structure. In addition, in other embodiments, a pressing bolt that presses the flange portion 29 of the scroll chamber frame 20 from the side opposite to the bearing frame 40 may be used.

In the embodiment described with reference to FIG. 6 , the clamp 54 configured to clamp the scroll chamber frame 20 and the bearing frame 40 is illustrated, but in other embodiments, a clamp configured to clamp the scroll chamber frame 20 and the bearing frame 40 may also be used. 20 and the muffler frame 22 for clamping. Thereby, the swirl chamber frame 20 and the muffler frame 22 can be stably coupled.

Claims (10)

1. a kind of compressor, it is characterised in that possess：

Impeller, the impeller are used for compressed air；

Air guides cylinder, and air guiding cylinder is used to house the impeller and guides the air；

Vortex chamber framework, the vortex chamber framework are arranged to adjacent with air guiding cylinder and form vortex chamber, and the vortex chamber is used In the air of cylinder will be guided by the air to exterior guiding；

Bearing frame, the bearing frame are arranged to adjacent with the vortex chamber framework and are provided with bearing portion, the bearing portion axle branch Hold the rotary shaft of the impeller；

Fastening bolt, the fastening bolt fasten the vortex chamber framework and the bearing frame；And

Fixture, the fixture are configured to clamp the vortex chamber framework with the bearing frame,

The fixture has pressing bolt, and the pressing bolt is to the bearing frame from the side opposite with the vortex chamber framework Apply pressing, or pressing is applied from the side opposite with the bearing frame to the vortex chamber framework.

2. compressor according to claim 1, it is characterised in that

The top of the pressing bolt abuts in the axial direction of the impeller with the vortex chamber framework or the bearing frame, with Pressing is applied to the vortex chamber framework or the bearing frame on the axial direction.

3. compressor according to claim 1 or 2, it is characterised in that

The top of the pressing bolt is relative to the bearing frame from the side opposite with the vortex chamber framework in the axle Abutted upwards with the bearing frame.

4. compressor according to claim 1, it is characterised in that

The bearing frame has the flange part towards extension on the outside of the radial direction of the impeller,

The fastening bolt fastens the flange part of the vortex chamber framework and the bearing frame,

The fixture is configured to clamp the flange part of the vortex chamber framework and the bearing frame.

5. compressor according to claim 1, it is characterised in that

The fastening bolt and the fixture are located at position different from each other in the circumference of the impeller.

6. compressor according to claim 1, it is characterised in that

The fixture is located at the position of more than three in the circumference of the impeller.

7. compressor according to claim 1, it is characterised in that

The fixture has：

Part I, the Part I extend along the vortex chamber framework on the radial direction of the impeller；

Part II, the Part II extend along the bearing frame on the radial direction of the impeller；And

Part III, the Part III is in a manner of the Part I to be connected with the Part II in the axle of the impeller Upwardly extend.

8. compressor according to claim 7, it is characterised in that

The pressing bolt is configured to axially penetrate through the Part II simultaneously from the side opposite with the Part I along described Abutted with the bearing frame.

9. compressor according to claim 1, it is characterised in that

The fastening bolt and the pressing bolt are fixed along the axial direction from reciprocal side.

A kind of 10. booster, it is characterised in that

Possesses the compressor any one of claim 1 to 9.