CN213235216U

CN213235216U - Novel sealing thrust structure for turbocharger

Info

Publication number: CN213235216U
Application number: CN202021910277.5U
Authority: CN
Inventors: 凌旭; 张华然; 肖芝; 刘翔
Original assignee: Hunan Vocational College of Chemical Technology
Current assignee: Hunan Vocational College of Chemical Technology
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-05-18
Anticipated expiration: 2030-08-26

Abstract

The utility model relates to a novel sealed thrust structure for a turbocharger, the turbocharger comprises a turbine bearing body, a turbine rotating shaft is arranged in the turbine bearing body in a penetrating way, at least two floating bearings are sleeved outside the turbine rotating shaft, each floating bearing is arranged between the turbine rotating shaft and the turbine bearing body, a turbine rotor and an impeller are respectively sleeved outside the two ends of the turbine rotating shaft, the novel sealed thrust structure is sleeved outside the turbine rotating shaft, the sealed thrust structure comprises a thrust sealing shaft sleeve sleeved on the turbine rotating shaft, a sealing ring and a thrust bearing sleeved on the thrust sealing shaft sleeve, the thrust bearing and the sealing ring are arranged at the two ends of the thrust sealing shaft sleeve, the thrust sealing shaft sleeve is arranged between the impeller and the turbine bearing body, one end of the thrust sealing shaft sleeve, which is far away from the impeller, is tightly attached to the turbine bearing body, one end of the thrust sealing shaft, the problem of prior art's turbo charger's seal structure part quantity more, the structure is complicated is solved.

Description

Novel sealing thrust structure for turbocharger

Technical Field

This patent involves turbo charger technical field, especially a novel sealed thrust structure for turbo charger.

Background

The turbocharger turbine drives the air compressor to rotate by utilizing the energy of combustion waste gas, and the air compressor compresses air to improve the air inlet density, so that the combustion efficiency of the internal combustion engine is improved, and more work output is realized. The turbocharger is subjected to gas axial force from a compressor end and a turbine end simultaneously during the operation process, the axial force is changed along with the change of the working condition of the turbocharger, and therefore the turbocharger intermediate body needs to have an axial thrust effect. In addition, in order to prevent the gas at the gas compressor end and the gas at the turbine end from entering the supercharger and prevent the lubricating oil in the intermediate body from leaking, sealing structures must be designed at two ends of the rotating shaft of the supercharger to ensure the normal use of the supercharger.

The rotor system structure of the turbocharger in the prior art is as follows: the sealing sleeve and the oil sealing cover are assembled together, the sealing ring is arranged on the sealing sleeve, the sealing sleeve and the thrust sleeve are arranged on the small shaft diameter of the rotor, one end face of the thrust sleeve is positioned by the shaft shoulder of the rotor, and the thrust bearing is arranged in the middle of the thrust sleeve. The compressor impeller is pressed on the end face of the sealing sleeve through the locking nut, the sealing sleeve is pressed on the thrust sleeve, the thrust bearing is pressed on the bearing body through the oil sealing cover to carry out axial limiting on the rotor, and the floating bearing is arranged on the large shaft diameter of the rotor. The rotor system is complex in structural installation and low in assembly precision, and because the sealing sleeve and the thrust sleeve are mutually sleeved to form a combined part of the thrust sleeve, the combined part of the whole thrust sleeve is large in mass and large in size, so that the rotor system is large in rotational inertia and poor in low-speed responsiveness.

Accordingly, the inventors provide a novel seal thrust structure for a turbocharger.

SUMMERY OF THE UTILITY MODEL

(1) Technical problem to be solved

The embodiment of the utility model provides a novel sealed thrust structure is put for turbo charger is through being equipped with the sealed annular that is used for installing the sealing ring on the sealed axle sleeve of thrust for the sealed axle sleeve of thrust not only possesses the thrust function, and still concrete sealed function has solved prior art's turbo charger's seal structure part quantity more, technical problem that the structure is complicated.

(2) Technical scheme

In a first aspect, an embodiment of the present invention provides a turbocharger including a turbine bearing body, a turbine shaft is inserted into the turbine bearing body, at least two floating bearings are sleeved outside the turbine shaft, each floating bearing is disposed between the turbine shaft and the turbine bearing body, a turbine rotor and an impeller are respectively sleeved outside two ends of the turbine shaft, the novel sealing thrust structure is sleeved on the turbine shaft, the sealing thrust structure includes a thrust sealing shaft sleeve sleeved on the turbine shaft, a sealing ring and a thrust bearing sleeved on the thrust sealing shaft sleeve, the thrust bearing and the sealing ring are disposed at two ends of the thrust sealing shaft sleeve, the thrust sealing shaft sleeve is disposed between the impeller and the turbine bearing body, and one end of the thrust sealing shaft sleeve, which is far away from the impeller, is tightly attached to the turbine bearing body, one end of the thrust sealing shaft sleeve close to the impeller is in sealing fit with the end face of the impeller

Furthermore, a first sealing ring groove and a second sealing ring groove for installing the sealing ring are formed in the outer portion of the thrust sealing shaft sleeve.

Furthermore, a first oil groove and a second oil groove are further formed in the outer portion of the thrust sealing shaft sleeve, and the depth of the first oil groove in the thrust sealing shaft sleeve is lower than that of the second oil groove in the thrust sealing shaft sleeve.

Further, the outside of the thrust sealing shaft sleeve is also provided with a bearing mounting groove for mounting the thrust bearing, the bearing mounting groove is respectively located at the two ends of the thrust sealing shaft sleeve, and the second sealing ring groove is located between the first sealing ring groove and the bearing mounting groove.

Further, first oil groove with the second oil groove is located the second seal ring groove with between the bearing mounting groove, just the second oil groove is located first oil groove with between the bearing mounting groove.

Further, the depth of the bearing installation groove on the thrust sealing shaft sleeve is larger than that of the first oil groove on the thrust sealing shaft sleeve, and is smaller than that of the second oil groove on the thrust sealing shaft sleeve.

Furthermore, the sealing end cover is sleeved outside the thrust sealing shaft sleeve, and the sealing ring is positioned between the thrust sealing shaft sleeve and the sealing end cover and is pressed and attached to the thrust sealing shaft sleeve and the sealing end cover.

Further, the both ends of the turbine bearing body are connected with impeller end cover and turbine end cover respectively, the turbine bearing body with one of impeller end cover connection is served and is equipped with the ladder groove, a terminal surface shape of impeller with ladder groove shape adaptation, just the impeller compresses tightly through lock nut the ladder inslot, makes the impeller is located the terminal surface in ladder groove with keeping away from of thrust seal shaft sleeve the terminal surface of turbine rotor is hugged closely.

Further, the turbine bearing body with be equipped with U type support between the turbine end cover, the one end of turbine rotor passes U type support with turbine pivot fixed connection, the turbine rotor with the outside that one end is connected in the turbine pivot is equipped with the seal groove, all be equipped with sealed the pad on the seal groove.

Furthermore, the turbine bearing body is provided with an oil inlet, a first channel, a second channel and a third channel, wherein the first channel, the second channel and the third channel are communicated with the oil inlet, the first channel is communicated with an oil channel in the thrust bearing, the second channel is communicated with an oil channel of one of the floating bearings, and the third channel is communicated with an oil channel of the other floating bearing.

(3) Advantageous effects

To sum up, the utility model discloses a be equipped with the seal ring groove that is used for installing the sealing ring on the thrust seal axle sleeve, the thrust seal axle sleeve is kept away from the one end of impeller and is hugged closely on the turbine bearing body, the thrust seal axle sleeve is close to the end face seal cooperation of impeller for the thrust seal axle sleeve possesses the thrust function, with sealed function, cancelled the complex structure that needs to adopt the seal cover to realize the assembly among the prior art, reduced turbo charger shafting assembly part quantity, practiced thrift production and management cost, be favorable to improving the assembly precision; and the thrust sealing shaft sleeve is a single part, so that the mass is light, the size is small, the rotational inertia of the turbine rotating shaft is small, and the responsiveness of a rotor system is improved.

The utility model discloses an adopt the double containment groove structure on thrust seal shaft sleeve for thrust seal shaft sleeve is better with the sealed effect of impeller end face, when further preventing that the turbine pivot is rotatory, and the inside gas of impeller end cover gets into the turbine bearing body, prevents simultaneously that the epaxial lubricating oil of turbine pivot from outwards revealing.

The utility model discloses a be equipped with the oil groove of two degree of depth variation in size on thrust seal shaft sleeve, adopt the double flute can increase the storage volume of lubricating oil, when the oil return is not smooth, collect lubricating oil through two oil grooves, reducible lubricating oil is from the exerted risk of sealing ring, further protects the sealed effect of sealing ring.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the thrust seal bush of the present invention.

In the figure:

1-locking a nut; 2-an impeller; 3, sealing the end cover; 4-a thrust bearing; 5-a sealing ring; 6-thrust sealing shaft sleeve; 7-a turbine rotor; 8-a turbine bearing body; 9-a turbine shaft; 10-a floating bearing; 11-impeller end cap; 12-a turbine end cover; 13-U-shaped bracket; 61-a first seal ring groove; 62-a second seal ring groove; 63-a first oil sump; 64-a second oil sump; 65-bearing mounting grooves; 81-oil inlet; 82-a first channel; 83-a second channel; 84-third channel.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention, but are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, substitutions and improvements in the parts, components and connections without departing from the spirit of the invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

FIG. 1 is a schematic structural diagram of a novel sealing thrust structure for a turbocharger according to an embodiment of the present invention, as shown in FIG. 1, the turbocharger includes a turbine bearing body 8, a turbine shaft 9 penetrates through the turbine bearing body 8, at least two floating bearings 10 are sleeved outside the turbine shaft 9, each floating bearing 10 is disposed between the turbine shaft 9 and the turbine bearing body 8, a turbine rotor 7 and an impeller 2 are respectively sleeved outside both ends of the turbine shaft 9, the novel sealing thrust structure is sleeved on the turbine shaft 9, the sealing thrust structure includes a thrust sealing shaft sleeve 6 sleeved on the turbine shaft 9, a sealing ring 5 sleeved on the thrust sealing shaft sleeve 6 and a thrust bearing 4, the thrust bearing 4 and the sealing ring 5 are disposed at both ends of the thrust sealing shaft sleeve 6, the thrust sealing shaft sleeve 6 is disposed between the impeller 2 and the turbine bearing body 8, and one end of the thrust sealing shaft sleeve 6 away from the impeller 2 is tightly attached to the turbine bearing body 8, one end of the thrust sealing shaft sleeve 6 close to the impeller 2 is in sealing fit with the end face of the impeller 2.

The utility model discloses a be equipped with the seal ring groove that is used for installing the sealing ring on thrust seal axle sleeve, thrust seal axle sleeve keeps away from the one end of impeller and hugs closely on the turbine bearing body, thrust seal axle sleeve is close to the one end of impeller and the end face seal cooperation of impeller, make thrust seal axle sleeve possess the thrust function, with sealed function, the complex construction that needs to adopt the seal cover to realize the assembly among the prior art has been cancelled, turbocharger shafting assembly part quantity has been reduced, production and administrative cost have been practiced thrift, be of value to and improve the assembly precision, and thrust seal axle sleeve single part, the quality is light, small, make the inertia of turbine pivot little, rotor system's responsiveness has been improved.

As a preferred embodiment, a seal end cover 3 is further arranged in the turbine bearing body 8, the seal end cover 3 is sleeved outside the thrust seal shaft sleeve 6, and the seal ring 5 is located between the thrust seal shaft sleeve 6 and the seal end cover 3 and pressed and attached to each other.

As another preferred embodiment, two ends of the turbine bearing body 8 are respectively connected with an impeller end cover 11 and a turbine end cover 12, one end of the turbine bearing body 8 connected with the impeller end cover 11 is provided with a stepped groove, the shape of one end face of the impeller 2 is matched with the shape of the stepped groove, the impeller 2 is tightly pressed in the stepped groove through a locking nut 1, so that the end face of the impeller 2 located in the stepped groove is tightly attached to the end face, away from the turbine rotor 7, of the pushed sealing shaft sleeve 6, a U-shaped bracket 13 is arranged between the turbine bearing body 8 and the turbine end cover 12, one end of the turbine rotor 7 passes through the U-shaped bracket 13 to be fixedly connected or integrally connected with the turbine rotating shaft 9, a sealing groove is arranged outside one end of the turbine rotor 7 connected with the turbine rotating shaft 9, sealing gaskets are arranged on the sealing grooves and used for preventing gas inside or outside the turbine end cover, preferably, the number of the turbine bearing bodies 8 is two, the turbine bearing bodies 8 are provided with oil inlets 81, and a first channel 82, a second channel 83 and a third channel 84 which are communicated with the oil inlets 81, the first channel 82 is communicated with an oil channel in the thrust bearing 4, the second channel 83 is communicated with an oil channel of one floating bearing 10, and the third channel 84 is communicated with an oil channel of the other floating bearing 10.

Fig. 2 is a schematic structural view of the thrust seal bush of the present invention. As shown in fig. 2, the outside of the thrust sealing shaft sleeve 6 is provided with a first sealing ring groove 61 and a second sealing ring groove 62 for installing the sealing ring 5, and a double-sealing-groove structure is adopted on the thrust sealing shaft sleeve, so that the sealing effect of the thrust sealing shaft sleeve and the impeller end surface is better, when the turbine rotating shaft is further prevented from rotating, gas inside the impeller end cover enters the turbine bearing body, and meanwhile, lubricating oil on the turbine rotating shaft is prevented from leaking outwards.

In another preferred embodiment, the outer portion of the thrust seal housing 6 is further provided with a first oil groove 63 and a second oil groove 64, the depth of the first oil groove 63 in the thrust seal housing 6 is lower than the depth of the second oil groove 64 in the thrust seal housing 6, the first oil groove 63 is used for collecting the lubricating oil splashed from the vicinity of the seal ring 5 when the turbine rotary shaft 9 rotates, since the second oil groove 64 has a greater depth than the first oil groove 63, the second oil groove 64 increases the volume for collecting the lubricating oil, further reducing the risk of leakage of the lubricating oil from the location of the sealing rings, two oil grooves with different depths are arranged on the thrust sealing shaft sleeve, the storage volume of the lubricating oil can be increased by adopting double grooves, when oil return is not smooth, lubricating oil is collected through the two oil grooves, the risk that the lubricating oil is exposed from the sealing ring can be reduced, and the sealing effect of the sealing ring is further protected.

As another preferred embodiment, the outer portion of the thrust sealing sleeve 6 is further provided with a bearing mounting groove 65 for mounting the thrust bearing 4, the bearing mounting groove 65 and the first and second

sealing ring grooves

61 and 62 are respectively located at two ends of the thrust sealing sleeve 6, the second sealing ring groove 62 is located between the first sealing ring groove 61 and the bearing mounting groove 65, the first and

second oil grooves

63 and 64 are located between the second sealing ring groove 62 and the bearing mounting groove 65, and the second oil groove 64 is located between the first oil groove 63 and the bearing mounting groove 65, and the depth of the bearing mounting groove 65 on the thrust sealing sleeve 6 is greater than the depth of the first oil groove 63 on the thrust sealing sleeve 6 and less than the depth of the second oil groove 64 on the thrust sealing sleeve 6.

It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.

The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. The utility model provides a novel sealed thrust structure for turbo charger, turbo charger includes turbine bearing body (8), wear to be equipped with turbine pivot (9) in the turbine bearing body (8), turbine pivot (9) overcoat has two at least floating bearing (10), each floating bearing (10) all locate turbine pivot (9) with between the turbine bearing body (8), the both ends of turbine pivot (9) overcoat respectively have turbine rotor (7) and impeller (2), its characterized in that, novel sealed thrust structure overcoat in on turbine pivot (9), sealed thrust structure includes thrust seal axle sleeve (6) of overcoat on turbine pivot (9) and overcoat in sealing ring (5) and footstep bearing (4) on thrust seal axle sleeve (6), footstep bearing (4) with sealing ring (5) are located the both ends of thrust seal axle sleeve (6), the thrust sealing shaft sleeve (6) is arranged between the impeller (2) and the turbine bearing body (8), one end, far away from the impeller (2), of the thrust sealing shaft sleeve (6) is tightly attached to the turbine bearing body (8), and one end, close to the impeller (2), of the thrust sealing shaft sleeve (6) is in sealing fit with the end face of the impeller (2).

2. The novel seal thrust structure for a turbocharger according to claim 1, wherein the thrust seal bushing (6) is externally provided with a first seal ring groove (61) and a second seal ring groove (62) for mounting the seal ring (5).

3. The novel sealing thrust structure for the turbocharger according to claim 2, wherein a first oil groove (63) and a second oil groove (64) are further formed in the outer portion of the thrust sealing shaft sleeve (6), and the depth of the first oil groove (63) in the thrust sealing shaft sleeve (6) is lower than that of the second oil groove (64) in the thrust sealing shaft sleeve (6).

4. The novel sealing thrust structure for the turbocharger according to claim 3, wherein the outer portion of the thrust sealing shaft sleeve (6) is further provided with a bearing mounting groove (65) for mounting the thrust bearing (4), the bearing mounting groove (65) and the first sealing ring groove (61) and the second sealing ring groove (62) are respectively located at two ends of the thrust sealing shaft sleeve (6), and the second sealing ring groove (62) is located between the first sealing ring groove (61) and the bearing mounting groove (65).

5. The novel sealing thrust structure for a turbocharger according to claim 4, wherein the first oil groove (63) and the second oil groove (64) are located between the second sealing ring groove (62) and the bearing mounting groove (65), and the second oil groove (64) is located between the first oil groove (63) and the bearing mounting groove (65).

6. The novel sealing thrust structure for a turbocharger according to claim 5, wherein the depth of the bearing mounting groove (65) on the thrust seal boss (6) is greater than the depth of the first oil groove (63) on the thrust seal boss (6) and less than the depth of the second oil groove (64) on the thrust seal boss (6).

7. The novel sealing thrust structure for the turbocharger according to claim 1, wherein a sealing end cover (3) is further arranged in the turbine bearing body (8), the sealing end cover (3) is sleeved outside the thrust sealing shaft sleeve (6), and the sealing ring (5) is located between the thrust sealing shaft sleeve (6) and the sealing end cover (3) and is pressed and attached to each other.

8. The novel sealing thrust structure for the turbocharger according to claim 1, wherein an impeller end cover (11) and a turbine end cover (12) are connected to two ends of the turbine bearing body (8) respectively, a stepped groove is formed in one end, connected with the impeller end cover (11), of the turbine bearing body (8), a shape of a end face of the impeller (2) is matched with the shape of the stepped groove, the impeller (2) is tightly pressed in the stepped groove through a locking nut (1), and therefore the end face, located in the stepped groove, of the impeller (2) is tightly attached to the end face, far away from the turbine rotor (7), of the thrust sealing shaft sleeve (6).

9. The novel sealing thrust structure for the turbocharger according to claim 8, wherein a U-shaped bracket (13) is arranged between the turbine bearing body (8) and the turbine end cover (12), one end of the turbine rotor (7) penetrates through the U-shaped bracket (13) to be fixedly connected with the turbine rotating shaft (9), a sealing groove is arranged outside one end, connected with the turbine rotating shaft (9), of the turbine rotor (7), and sealing gaskets are arranged on the sealing grooves.

10. The novel sealing thrust structure for the turbocharger according to claim 9, wherein an oil inlet (81) and a first channel (82), a second channel (83) and a third channel (84) communicated with the oil inlet (81) are arranged on the turbine bearing body (8), the first channel (82) is communicated with an oil channel in the thrust bearing (4), the second channel (83) is communicated with an oil channel of one of the floating bearings (10), and the third channel (84) is communicated with an oil channel of the other floating bearing (10).