Turbocharger spindle

Abstract

The utility model relates to the technical field of turbochargers, and discloses a turbocharger main shaft which comprises a shaft body, the right end of the shaft body is fixedly connected with an impeller connecting end, the left end of the shaft body is fixedly connected with a turbine connecting end, connecting bolts are arranged on the impeller connecting end and the turbine connecting end, friction lines are arranged on the shaft body, and the friction lines are connected with the impeller connecting end and the turbine connecting end. The outer wall of the shaft body is movably sleeved with a first middle sleeve and a second middle sleeve, a first bearing is arranged on the shaft body, a second bearing and a third bearing are arranged on the shaft body, and the second bearing makes contact with the third bearing. The third bearing is additionally arranged by shortening the overall length of the first middle sleeve and the second middle sleeve, so that the compressive resistance of the bearing at one end of the shaft body is improved, the outer diameter stress of the bearing is reduced, the abrasion of the bearing is reduced, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, and particularly relates to a main shaft of a turbocharger. Background Art

[0002] The main shaft of a motorboat turbocharger generally refers to the core component inside the turbocharger, namely the shaft and the impeller assembly. The turbocharger consists of two parts, a compressor and a turbine, and the compressor and the turbine are driven by a common shaft. The function of the main shaft is to convert the energy of the exhaust gas discharged from the engine into kinetic energy, thereby compressing air, increasing the intake air volume, and increasing the power output of the engine.

[0003] Generally, only one bearing is provided at the turbine end of the main shaft of a turbocharger. The outer diameter of the bearing is subject to a large force, which will accelerate the wear of the bearing, thereby affecting the service life of the bearing. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a main shaft of a turbocharger aiming at the deficiencies in the above-mentioned prior art.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a main shaft of a turbocharger, including a shaft body. The right end of the shaft body is fixedly connected with an impeller connection end, and the left end of the shaft body is fixedly connected with a turbine connection end. Connecting bolts are arranged on both the impeller connection end and the turbine connection end. There are friction lines on the shaft body. A first intermediate sleeve and a second intermediate sleeve are movably sleeved on the outer wall of the shaft body. A first bearing is arranged on the shaft body. A second bearing and a third bearing are arranged on the shaft body, and the second bearing is in contact with the third bearing.

[0006] Preferably, a cooling sleeve is sleeved on the first intermediate sleeve and the second intermediate sleeve. A cooling water pipe is arranged on the inner wall of the cooling sleeve, and the cooling water pipe is arranged around the inner wall of the cooling sleeve and is in contact with the outer walls of the first intermediate sleeve and the second intermediate sleeve. Both ends of the cooling water pipe fixedly penetrate through the cooling sleeve.

[0007] Preferably, an oil injection port is opened on the cooling sleeve. Oil injection grooves are opened on both the first intermediate sleeve and the second intermediate sleeve, and the two oil injection grooves form a round hole. The inner diameter of the round hole is the same as the inner diameter of the oil injection port, both being 2.5 millimeters. By setting the oil injection port and the oil injection grooves, it is convenient to inject lubricating oil into the shaft body, which can improve the service life of the shaft body and cool the shaft body at the same time.

[0008] Preferably, positioning holes are opened on the first intermediate sleeve and the second intermediate sleeve. A positioning block is fixedly connected to the cooling sleeve, and the positioning block is slidably connected to the inner wall of the positioning hole. By setting the positioning holes and the positioning blocks, it is convenient to position and install the first intermediate sleeve, the second intermediate sleeve and the cooling sleeve, so that the oil injection port is directly above the oil injection groove.

[0009] Preferably, an installation groove is formed on the shaft body, and a temperature sensor is installed on the inner wall of the installation groove. By setting the temperature sensor, it is convenient to detect the temperature of the shaft body and avoid the influence of high temperature on the shaft body.

[0010] Preferably, a baffle is sleeved on the shaft body, and the baffle abuts against the third bearing. By setting the baffle, the operation of the second bearing and the third bearing can be made more stable.

[0011] The utility model adopts the above technical scheme and can bring the following beneficial effects:

[0012] 1. For the main shaft of a turbocharger, by shortening the overall length of the first intermediate sleeve and the second intermediate sleeve to add a third bearing, the compressive resistance of the bearing at one end of the shaft body is improved, and then the external diameter stress of the bearing is reduced, thereby reducing the wear of the bearing and improving the service life of the bearing.

[0013] 2. For the main shaft of a turbocharger, by providing a cooling sleeve and a cooling water pipe, the first intermediate sleeve and the second intermediate sleeve can be cooled, thereby cooling the shaft body and improving the operation stability of the shaft body. By providing an oil injection port and an oil injection groove with an inner diameter of 2.5 mm, compared with the traditional oil injection port of 1 mm, the lubricating oil can be more effectively injected onto the shaft body, thereby lubricating and cooling the shaft body at the same time, and further improving the operation stability and service life of the shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a front sectional view of the utility model;

[0016] Figure 3 is an enlarged view of part A of the utility model;

[0017] Figure 4 is an enlarged view of part B of the utility model.

[0018] In the figure: 1. Shaft body; 2. Impeller connection end; 3. Turbine connection end; 4. Friction pattern; 5. First intermediate sleeve; 6. Second intermediate sleeve; 7. First bearing; 8. Second bearing; 9. Third bearing; 10. Cooling sleeve; 11. Cooling water pipe; 12. Oil injection port; 13. Oil injection groove; 14. Positioning hole; 15. Positioning block; 16. Installation groove; 17. Baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "several" means two or more, unless otherwise clearly and specifically defined.

[0023] Please refer to Figures 1-4 , an embodiment of the present utility model is: a main shaft of a turbocharger, including a shaft body 1. A impeller connection end 2 is fixedly connected to the right end of the shaft body 1, and a turbine connection end 3 is fixedly connected to the left end of the shaft body 1. Connecting bolts are provided on both the impeller connection end 2 and the turbine connection end 3. Friction lines 4 are provided on the shaft body 1. A first intermediate sleeve 5 and a second intermediate sleeve 6 are movably sleeved on the outer wall of the shaft body 1. A first bearing 7 is provided on the shaft body 1. A second bearing 8 and a third bearing 9 are provided on the shaft body 1, and the second bearing 8 is in contact with the third bearing 9. An installation groove 16 is provided on the shaft body 1, and a temperature sensor is installed on the inner wall of the installation groove 16. By providing the temperature sensor, it is convenient to detect the temperature of the shaft body 1 and avoid the influence of high temperature on the shaft body 1. A baffle 17 is sleeved on the shaft body 1, and the baffle 17 abuts against the third bearing 9. By providing the baffle 17, it is to make the operation of the second bearing 8 and the third bearing 9 more stable.

[0024] Working principle: The turbine is installed on the shaft body 1 through the turbine connection end 3. The shaft body 1 is installed inside the turbocharger, and then the impeller is installed on the shaft body 1 through the impeller connection end 2 to complete the installation of the shaft body 1. Through the provided first bearing 7, second bearing 8, and third bearing 9, the shaft body 1 can rotate relative to the first intermediate sleeve 5 and the second intermediate sleeve 6.

[0025] Please refer to Figures 1-4 , on the basis of the above-mentioned embodiment, in another embodiment of the present utility model, a cooling sleeve 10 is sleeved on the first intermediate sleeve 5 and the second intermediate sleeve 6. The inner wall of the cooling sleeve 10 is provided with cooling water pipes 11, and the cooling water pipes 11 are arranged around the inner wall of the cooling sleeve 10 and are in contact with the outer walls of the first intermediate sleeve 5 and the second intermediate sleeve 6. Both ends of the cooling water pipes 11 are fixedly penetrated through the cooling sleeve 10. An oil injection port 12 is opened on the cooling sleeve 10, and oil injection grooves 13 are opened on both the first intermediate sleeve 5 and the second intermediate sleeve 6. And the two oil injection grooves 13 form a circular hole, and the inner diameter of the circular hole is the same as the inner diameter of the oil injection port 12, both being 2.5 millimeters. By providing the oil injection port 12 and the oil injection grooves 13, it is convenient to inject lubricating oil into the shaft body 1, which can improve the service life of the shaft body 1 and cool the shaft body 1 at the same time. Positioning holes 14 are opened on the first intermediate sleeve 5 and the second intermediate sleeve 6, and a positioning block 15 is fixedly connected to the cooling sleeve 10, and the positioning block 15 is slidably connected to the inner wall of the positioning hole 14. By providing the positioning holes 14 and the positioning block 15, it is convenient to position and install the first intermediate sleeve 5, the second intermediate sleeve 6, and the cooling sleeve 10, so that the oil injection port 12 is directly above the oil injection groove 13.

[0026] Working principle: By injecting coolant into the inside of the cooling water pipes 11, the shaft body 1 during operation is cooled. Lubricating fluid is injected onto the shaft body 1 through the oil injection port 12 and the oil injection grooves 13 to lubricate and cool the shaft body 1 at the same time, so that the shaft body 1 is more stable during operation.

[0027] The present utility model provides a main shaft of a turbocharger. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. Each component not clearly defined in this embodiment can be realized by using existing technologies.

Claims

1. A turbocharger main shaft, comprising a shaft body (1), characterized in that: The right end of the shaft body (1) is fixedly connected to an impeller connecting end (2), the left end of the shaft body (1) is fixedly connected to a turbine connecting end (3), the impeller connecting end (2) and the turbine connecting end (3) are both provided with connecting bolts, the shaft body (1) has friction patterns (4), the outer wall movable sleeve of the shaft body (1) is provided with a first intermediate sleeve (5) and a second intermediate sleeve (6), the shaft body (1) is provided with a first bearing (7), the shaft body (1) is provided with a second bearing (8) and a third bearing (9), and the second bearing (8) is in contact with the third bearing (9).

2. A turbocharger main shaft according to claim 1, characterized in that: A cooling jacket (10) is provided on the first intermediate jacket (5) and the second intermediate jacket (6), and a cooling water pipe (11) is provided on the inner wall of the cooling jacket (10). The cooling water pipe (11) is arranged around the inner wall of the cooling jacket (10) and contacts the outer wall of the first intermediate jacket (5) and the second intermediate jacket (6), and both ends of the cooling water pipe (11) are fixedly passed through the cooling jacket (10).

3. A turbocharger main shaft according to claim 2, characterized in that: The cooling sleeve (10) is provided with an oil filling port (12), and the first intermediate sleeve (5) and the second intermediate sleeve (6) are both provided with an oil filling groove (13), and the two oil filling grooves (13) form a circular hole, and the inner diameter of the circular hole is the same as the inner diameter of the oil filling port (12), both of which are 2.5 mm.

4. A turbocharger main shaft according to claim 3, characterized in that: The first intermediate sleeve (5) and the second intermediate sleeve (6) are provided with positioning holes (14), the cooling sleeve (10) is fixedly connected with a positioning block (15), and the positioning block (15) is slidably connected to the inner wall of the positioning hole (14).

5. A turbocharger main shaft according to claim 4, characterized in that: The shaft body (1) is provided with a mounting groove (16), and a temperature sensor is mounted on the inner wall of the mounting groove (16).

6. A turbocharger main shaft according to claim 5, characterized in that: A baffle (17) is sleeved on the shaft body (1), and the baffle (17) is in contact with the third bearing (9).

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