Volute device with adjustable structure

Abstract

The invention relates to a volute device with an adjustable structure. A volute comprises a volute body and an air inlet connector, and a longitudinal partition wall divides an air inlet connector flow channel into an outer side air inlet connector flow channel and an inner side air inlet connector flow channel; a guide groove and a deflation groove are formed in the upper transverse ring, a guide partition plate is inserted into the guide groove in a sliding mode, the rear end of the guide partition plate makes contact with the front end of the longitudinal partition wall, the guide partition plate gradually gets close to the axis of the volute body, and when the sliding partition wall descends in place, part of the volute flow channel is divided into an outer side volute flow channel and an inner side volute flow channel. And when the sliding partition wall ascends in place, the lower end part of the guide partition plate ascends into the deflation groove, and the volute runner, the guide groove and the deflation groove are communicated. The EGR rate of the engine can be increased or the medium-low rotating speed air inflow can be increased, the medium-high rotating speed air inflow of the engine can be increased or the turbine front pressure can be reduced, and the supercharging pressure of the supercharger can be adjusted.

Description

Technical Field

[0001] The present invention belongs to the technical field of turbocharging devices, and specifically discloses a volute device with an adjustable structure. Background Art

[0002] Figure 1 For a common volute structure in the market, the volute 1 includes a volute body and an air inlet joint. A single air inlet joint flow channel 1.4 is provided in the air inlet joint. A bypass valve component 1.2 is provided on the volute 1. The working medium 4 flows into the air inlet joint flow channel 1.4. When the bypass valve component is opened, part of the working medium flows out from the bypass valve hole 1.3 to play a role in bypassing waste gas to adjust the work capacity of the supercharger.

[0003] Another relatively common existing volute structure is shown in Figure 2 , the volute 1 includes a volute body and an air inlet joint. An integral transverse partition wall 1.11 is provided in the volute body and the air inlet joint. The transverse partition wall 1.11 located in the volute body divides part of the volute flow channel 1.7 into an upper transverse volute flow channel 1.71 and a lower transverse volute flow channel 1.72. The transverse partition wall 1.11 located in the air inlet joint divides the air inlet joint flow channel 1.4 into an upper transverse air inlet joint flow channel 1.41 and a lower transverse air inlet joint flow channel 1.42. A bypass valve component 1.2 is provided on the volute 1. The working medium 4 flows into the first transverse air inlet joint flow channel 1.41 and the second transverse air inlet joint flow channel 1.42. When the bypass valve component 1.2 is opened, part of the working medium 4 flows out from the bypass valve hole 1.3 to play a role in bypassing waste gas to adjust the work capacity of the supercharger.

[0004] Figure 1 , Figure 2 The volute structures shown in 1. Figure 1 and Figure 2 After the supercharger of the volute device shown in Figure 2 is installed and used, there is an interference between the exhaust pulses of each cylinder in both engines. For the engine with the supercharger of the volute device shown in Figure 1 and Figure 2 shown, there is also a situation of air leakage between the two flow channels. The volute devices shown in

[0005] 2. Figure 1 and Figure 2 Once the structure of the volute device shown in Summary of the Invention

[0006] The object of the present invention is to overcome the deficiencies existing in the prior art and provide a volute device with an adjustable structure.

[0007] According to the technical solution provided by the present invention, the volute device with an adjustable structure includes a volute, which comprises a volute body and an air inlet joint. An upper transverse ring and a lower transverse ring are fixed inside the volute body. The upper transverse ring is close to the air outlet end of the volute and is located above the lower transverse ring. A volute flow channel is formed between the upper transverse ring and the lower transverse ring, and an air inlet joint flow channel is provided inside the air inlet joint. A longitudinal partition wall is fixed inside the air inlet joint, and the longitudinal partition wall divides the air inlet joint flow channel into an outer air inlet joint flow channel and an inner air inlet joint flow channel. A guiding groove and a gas release groove are formed on the upper transverse ring. The lower end of the gas release groove is connected to the upper end of the guiding groove. The lower end of the guiding groove penetrates the lower surface of the upper transverse ring, and the upper end of the gas release groove penetrates the upper surface of the upper transverse ring. The guiding groove is arranged with equal width up and down, and the width of the gas release groove ≥ the width of the guiding groove. It further includes a sliding partition wall, which comprises a guiding partition plate, a cover plate and a connecting plate. The upper end of the guiding partition plate is fixed to the lower surface of the cover plate, the lower end of the connecting plate is fixed to the upper surface of the cover plate, and a lifting drive slideway is formed on the connecting plate. The guiding partition plate is slidably inserted into the guiding groove, and the rear end of the guiding partition plate contacts the front end of the longitudinal partition wall; in the direction from back to front, the guiding partition plate gradually approaches the axis of the volute body. A sliding partition wall lifting drive mechanism is installed on the volute body. Under the action of the sliding partition wall lifting drive mechanism, when the sliding partition wall descends to the in-place position, the cover plate seals the upper end opening of the gas release groove, and the lower end of the guiding partition plate contacts the upper surface of the lower transverse ring, dividing part of the volute flow channel into an outer volute flow channel and an inner volute flow channel. Under the action of the sliding partition wall lifting drive mechanism, when the sliding partition wall ascends to the in-place position, the lower end of the guiding partition plate rises into the gas release groove, and the volute flow channel, the guiding groove and the gas release groove are communicated.

[0008] Preferably, it further includes a volute bushing. A volute bushing hole is formed on the volute body corresponding to the upper part of the upper transverse ring, and the volute bushing is press-fitted into the volute bushing hole with an interference fit.

[0009] Preferably, the sliding partition wall lifting drive mechanism includes a rocker slider, a riveting pin, a rocker and a rocker shaft; the rocker shaft is rotatably installed in the volute bushing, a rocker is fixed to the inner end of the rocker shaft, the riveting pin is riveted on the rocker, the rocker slider is rotatably installed on the riveting pin, and the rocker slider is slidably installed in the lifting drive slideway.

[0010] Preferably, the longitudinal section of the air release groove is a V-shaped structure with a wider upper opening and a narrower lower opening or a rectangular structure with equal widths of the upper and lower openings.

[0011] More preferably, the longitudinal section of the air release groove is a V-shaped structure with a wider upper opening and a narrower lower opening.

[0012] Preferably, it further includes an anti-friction bushing, which includes an integrally fixed anti-friction bushing top plate, an anti-friction bushing connecting plate and an anti-friction bushing bottom plate. The lower surface of the anti-friction bushing top plate is attached to the upper surface of the upper transverse ring, the anti-friction bushing connecting plate is attached to the side wall of the air release groove, and the anti-friction bushing bottom plate is attached to the side wall of the guiding groove; The guiding partition plate is slidably inserted between the anti-friction bushing bottom plates.

[0013] The present invention has the following advantages: 1. It can improve the EGR rate of the engine or increase the intake air volume at medium and low speeds, can increase the intake air volume at medium and high speeds of the engine or reduce the pressure in front of the turbine, and can also adjust the supercharging pressure of the supercharger; 2. By means of the sliding partition wall, the volute flow channel is divided into two complete non-full-circumference volute flow channels (i.e., the outer volute flow channel and the inner volute flow channel), and in cooperation with the longitudinal partition wall, the intake joint flow channel is divided into an outer intake joint flow channel and an inner intake joint flow channel, which can effectively reduce the waste of pulse energy caused by the exhaust sequence of each cylinder of the engine; 3. It can adjust the proportion of the flow channel sizes of the two complete non-full-circumference volute flow channels (i.e., the outer volute flow channel and the inner volute flow channel) by changing the design and installation position of the sliding partition wall, forming an ideal asymmetric flow channel design, which plays an important role in improving the EGR rate of the EGR engine under low-speed conditions; 4. By changing the thickness of the guiding partition plate on the sliding partition wall, the single / double flow channels can be switched, and the basic flow capacity of the entire turbine end can be adjusted according to requirements, broadening the flow range of the turbine end. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of an existing single-flow volute.

[0015] Figure 2 is a schematic structural diagram of an existing double-flow volute.

[0016] Figure 3 is a schematic structural diagram of Embodiment 1 in the double-flow mode.

[0017] Figure 4 is one of the schematic structural diagrams of Embodiment 1 in the single-flow mode.

[0018] Figure 5 is another schematic structural diagram of Embodiment 1 in the single-flow mode.

[0019] Figure 6 It is a schematic diagram of the cooperation between the longitudinal partition wall and the guiding partition plate in Embodiment 1.

[0020] Figure 7 It is a schematic diagram of the structure of the lifting drive mechanism of the sliding partition wall in Embodiment 1.

[0021] Figure 8 It is a schematic diagram of the structure of Embodiment 2.

[0022] Explanation of reference numerals: 1 is the volute, 1.11 is the transverse partition wall, 1.12 is the longitudinal partition wall, 1.2 is the bypass valve component, 1.3 is the bypass valve hole, 1.4 is the intake joint flow channel, 1.41 is the upper transverse intake joint flow channel, 1.42 is the lower transverse intake joint flow channel, 1.43 is the outer intake joint flow channel, 1.44 is the inner intake joint flow channel, 1.5 is the upper transverse ring, 1.51 is the guiding groove, 1.52 is the air release groove, 1.6 is the lower transverse ring, 1.7 is the volute flow channel, 1.71 is the upper transverse volute flow channel, 1.72 is the lower transverse volute flow channel, 1.73 is the outer volute flow channel, 1.74 is the inner volute flow channel, 2 is the sliding partition wall, 2.1 is the guiding partition plate, 2.2 is the cover plate, 2.3 is the connecting plate, 3 is the lifting drive mechanism of the sliding partition wall, 3.1 is the rocker slider, 3.2 is the riveting pin, 3.3 is the rocker arm, 3.4 is the rocker arm shaft, 4 is the working medium, 5 is the volute bushing, 6 is the antifriction bushing, 6.1 is the antifriction bushing top plate, 6.2 is the antifriction bushing connecting plate, 6.3 is the antifriction bushing bottom plate. Detailed implementation manners

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0024] Embodiment 1 A volute device with an adjustable structure, as Figure 3-7 shown, includes a volute 1. The volute 1 includes a volute body and an intake joint. An upper transverse ring 1.5 and a lower transverse ring 1.6 are fixed in the volute body. The upper transverse ring 1.5 is close to the outlet end of the volute 1. The upper transverse ring 1.5 is located above the lower transverse ring 1.6. A volute flow channel 1.7 is formed between the upper transverse ring 1.5 and the lower transverse ring 1.6. An intake joint flow channel 1.4 is provided in the intake joint; A longitudinal partition wall 1.12 is fixed inside the intake joint. The longitudinal partition wall 1.12 divides the intake joint flow channel 1.4 into an outer intake joint flow channel 1.43 and an inner intake joint flow channel 1.44. A guiding groove 1.51 and a gas release groove 1.52 are formed in the upper transverse ring 1.5. The lower end of the gas release groove 1.52 is connected to the upper end of the guiding groove 1.51. The lower end of the guiding groove 1.51 penetrates through the lower surface of the upper transverse ring 1.5, and the upper end of the gas release groove 1.52 penetrates through the upper surface of the upper transverse ring 1.5. The guiding groove 1.51 has a uniform width from top to bottom, and the width of the gas release groove 1.52 ≥ the width of the guiding groove 1.51. It further includes a sliding partition wall 2. The sliding partition wall 2 includes a guiding partition plate 2.1, a cover plate 2.2 and a connecting plate 2.3. The upper end of the guiding partition plate 2.1 is fixed to the lower surface of the cover plate 2.2, the lower end of the connecting plate 2.3 is fixed to the upper surface of the cover plate 2.2, and a lifting drive slideway 2.31 is formed in the connecting plate 2.3. The guiding partition plate 2.1 is slidably inserted into the guiding groove 1.51, and the rear end of the guiding partition plate 2.1 contacts the front end of the longitudinal partition wall 1.12. In the direction from back to front, the guiding partition plate 2.1 gradually approaches the axis of the volute body. A sliding partition wall lifting drive mechanism 3 is installed on the volute body. Under the action of the sliding partition wall lifting drive mechanism, when the sliding partition wall 2 descends to the in-place position, the cover plate 2.2 seals the upper end opening of the gas release groove 1.52, and the lower end of the guiding partition plate 2.1 contacts the upper surface of the lower transverse ring 1.6, dividing part of the volute flow channel 1.7 into an outer volute flow channel 1.73 and an inner volute flow channel 1.74. Under the action of the sliding partition wall lifting drive mechanism, when the sliding partition wall 2 ascends to the in-place position, the lower end of the guiding partition plate 2.1 rises into the gas release groove 1.52, and the volute flow channel, the guiding groove 1.51 and the gas release groove 1.52 are communicated.

[0025] It further includes a volute bushing 5. A volute bushing hole is formed in the volute body corresponding to the upper side of the upper transverse ring 1.5, and the volute bushing 5 is press-fitted into the volute bushing hole with an interference fit.

[0026] The sliding partition wall lifting drive mechanism 3 includes a rocker slider 3.1, a riveting pin 3.2, a rocker arm 3.3 and a rocker arm shaft 3.4. The rocker arm shaft 3.4 is rotatably installed in the volute bushing 5. A rocker arm 3.3 is fixed to the inner end of the rocker arm shaft 3.4. The riveting pin 3.2 is riveted on the rocker arm 3.3. The rocker slider 3.1 is rotatably installed on the riveting pin 3.2, and the rocker slider 3.1 is slidably installed in the lifting drive slideway 2.31. The rocker arm shaft 3.4 rotates to drive the rocker arm 3.3 to swing, so that the rocker slider 3.1 drives the sliding partition wall 2 to lift while sliding in the lifting drive slideway 2.31.

[0027] The longitudinal section of the air release groove 1.52 is a V-shaped structure with a wide upper opening and a narrow lower opening or a rectangular structure with equal widths of the upper and lower openings.

[0028] Preferably, the longitudinal section of the air release groove 1.52 is a V-shaped structure with a wide upper opening and a narrow lower opening.

[0029] When the turbine with the structure of Embodiment 1 is working, when the engine needs to increase the EGR rate or increase the intake air volume at medium and low engine speeds, under the action of the sliding partition wall lifting drive mechanism 3, the sliding partition wall 2 moves downward. As Figure 3 shown, the cover plate 2.2 seals the upper end opening of the air release groove 1.52 to prevent the leakage of the working medium 4. The lower end of the guiding partition plate 2.1 contacts the upper surface of the lower transverse ring 1.6. The guiding partition plate 2.1 divides part of the volute flow passage 1.7 into an outer volute flow passage 1.73 and an inner volute flow passage 1.74. Part of the working medium 4 enters the outer volute flow passage 1.73 through the outer intake joint flow passage 1.43, and part of the working medium 4 enters the inner volute flow passage 1.74 through the inner intake joint flow passage 1.44.

[0030] When the engine needs to increase the intake air volume at medium and high engine speeds or reduce the pressure in front of the turbine, under the action of the sliding partition wall lifting drive mechanism 3, the sliding partition wall 2 moves upward until the lower end of the guiding partition plate 2.1 is flush with the top of the volute flow passage 1.7. As Figure 4 shown, the guiding partition plate 2.1 no longer separates the volute flow passage 1.7. At this time, there is only a single volute flow passage 1.7 behind the longitudinal partition wall 1.12. Since the guiding partition plate 2.1 no longer occupies the volute flow area, the volute flow passage 1.7 has a larger flow capacity compared with the double-flow passage composed of the outer volute flow passage 1.73 and the inner volute flow passage 1.74, which has a certain improvement in reducing the exhaust back pressure and fuel consumption of the engine.

[0031] When the waste gas energy of the engine is too high and it is necessary to bypass part of the waste gas, under the action of the sliding partition wall lifting drive mechanism 3, the sliding partition wall 2 moves upward, and the lower end of the guiding partition plate 2.1 rises into the air release groove 1.52. As Figure 5 shown, the volute flow passage, the guiding groove 1.51 and the air release groove 1.52 are connected, and the working medium 4 will bypass to the volute outlet through the guiding groove 1.51 and the air release groove 1.52 to adjust the supercharging pressure of the supercharger.

[0032] Embodiment 2 As Figure 8As shown, in this embodiment, an anti-friction bushing 6 is added on the basis of Embodiment 1. The anti-friction bushing 6 includes an integrally fixed anti-friction bushing top plate 6.1, an anti-friction bushing connecting plate 6.2, and an anti-friction bushing bottom plate 6.3. The lower surface of the anti-friction bushing top plate 6.1 is in contact with the upper surface of the upper transverse ring 1.5, the anti-friction bushing connecting plate 6.2 is in contact with the side wall of the air release groove 1.52, and the anti-friction bushing bottom plate 6.3 is in contact with the side wall of the guide groove 1.51; The guide partition plate 2.1 is slidably inserted between the anti-friction bushing bottom plates 6.3. The wear between the guide partition plate 2.1 and the guide groove 1.51 can be reduced, and the service life of the guide partition plate 2.1 and the guide groove 1.51 can be extended.

[0033] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be limiting. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A volute device with an adjustable structure, comprising a volute (1), the volute (1) including a volute body and an air inlet joint. An upper transverse ring (1.5) and a lower transverse ring (1.6) are fixed inside the volute body. The upper transverse ring (1.5) is close to the air outlet end of the volute (1), the upper transverse ring (1.5) is located above the lower transverse ring (1.6), and a volute flow channel (1.7) is formed between the upper transverse ring (1.5) and the lower transverse ring (1.6). An air inlet joint flow channel (1.4) is provided inside the air inlet joint; It is characterized in that: A longitudinal partition wall (1.12) is fixed inside the air inlet joint, and the longitudinal partition wall (1.12) divides the air inlet joint flow channel (1.4) into an outer air inlet joint flow channel (1.43) and an inner air inlet joint flow channel (1.44); A guiding groove (1.51) and a gas release groove (1.52) are formed on the upper transverse ring (1.5). The lower end of the gas release groove (1.52) is connected to the upper end of the guiding groove (1.51). The lower end of the guiding groove (1.51) penetrates through the lower surface of the upper transverse ring (1.5), the upper end of the gas release groove (1.52) penetrates through the upper surface of the upper transverse ring (1.5), the guiding groove (1.51) is arranged with equal width up and down, and the width of the gas release groove (1.52) ≥ the width of the guiding groove (1.51); It further includes a sliding partition wall (2), and the sliding partition wall (2) includes a guiding partition plate (2.1), a cover plate (2.2) and a connecting plate (2.3). The upper end of the guiding partition plate (2.1) is fixed to the lower surface of the cover plate (2.2), the lower end of the connecting plate (2.3) is fixed to the upper surface of the cover plate (2.2), and a lifting driving slideway (2.31) is formed on the connecting plate (2.3); The guiding partition plate (2.1) is slidably inserted into the guiding groove (1.51), and the rear end of the guiding partition plate (2.1) contacts the front end of the longitudinal partition wall (1.12); in the direction from back to front, the guiding partition plate (2.1) gradually approaches the axis of the volute body; A sliding partition wall lifting driving mechanism (3) is installed on the volute body; Under the action of the sliding partition wall lifting driving mechanism, when the sliding partition wall (2) descends in place, the cover plate (2.2) seals the upper end opening of the gas release groove (1.52), and the lower end of the guiding partition plate (2.1) contacts the upper surface of the lower transverse ring (1.6), dividing part of the volute flow channel (1.7) into an outer volute flow channel (1.73) and an inner volute flow channel (1.74); Under the action of the sliding partition wall lifting driving mechanism, when the sliding partition wall (2) rises in place, the lower end of the guiding partition plate (2.1) rises into the gas release groove (1.52), and the volute flow channel (1.7), the guiding groove (1.51) and the gas release groove (1.52) are communicated.

2. The volute device with an adjustable structure according to claim 1, characterized in that: It further includes a volute bushing (5). A volute bushing hole is formed on the volute body corresponding to the upper part of the upper transverse ring (1.5), and the volute bushing (5) is press-fitted into the volute bushing hole with an interference fit.

3. The volute device with an adjustable structure according to claim 2, characterized in that: The lifting drive mechanism (3) of the sliding partition wall includes a rocker slider (3.1), a riveting pin (3.2), a rocker arm (3.3) and a rocker arm shaft (3.4); the rocker arm shaft (3.4) is rotatably installed in the volute bushing (5), a rocker arm (3.3) is fixed to the inner end of the rocker arm shaft (3.4), the riveting pin (3.2) is riveted on the rocker arm (3.3), the rocker slider (3.1) is rotatably installed on the riveting pin (3.2), and the rocker slider (3.1) is slidably installed in the lifting drive slideway (2.31).

4. The volute device with an adjustable structure according to claim 1, characterized in that: The longitudinal section of the air release groove (1.52) is a V-shaped structure with a wide upper opening and a narrow lower opening or a rectangular structure with equal widths of the upper and lower openings.

5. The volute device with an adjustable structure according to claim 4, characterized in that: The longitudinal section of the air release groove (1.52) is a V-shaped structure with a wide upper opening and a narrow lower opening.

6. The volute device with an adjustable structure according to claim 1, characterized in that: It further includes a wear-reducing bushing (6), the wear-reducing bushing (6) includes an integrally fixed wear-reducing bushing top plate (6.1), a wear-reducing bushing connecting plate (6.2) and a wear-reducing bushing bottom plate (6.3), the lower surface of the wear-reducing bushing top plate (6.1) is attached to the upper surface of the upper transverse ring (1.5), the wear-reducing bushing connecting plate (6.2) is attached to the side wall of the air release groove (1.52), and the wear-reducing bushing bottom plate (6.3) is attached to the side wall of the guiding groove (1.51); The guiding partition plate (2.1) is slidably inserted between the wear-reducing bushing bottom plates (6.3).

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