A centrifugal turbocharger impeller assembly

Abstract

This utility model relates to the field of turbocharger impeller technology, specifically a centrifugal turbocharger impeller assembly, including an impeller body, blades, and a rear bearing plate. The impeller body is mounted on one side of the rear bearing plate. A positioning groove for mounting a reinforcing disc is provided on the side of the rear bearing plate away from the impeller body. A sealing gasket is glued to the inner wall of the positioning groove. The reinforcing disc is fixedly connected to the rear bearing plate by self-tapping screws. A circular ring-shaped limiting component is provided in the center of the positioning groove. A limiting groove matching the limiting component is provided in the center of the side of the reinforcing disc near the rear bearing plate. A cylindrical hollow bushing is provided in the center of the side of the reinforcing disc away from the rear bearing plate. By providing a positioning groove and limiting component on the rear bearing plate, combined with the retaining groove and limiting groove of the reinforcing disc, and the fixing with self-tapping screws, the structural strength of the rear bearing plate is greatly enhanced. Compared with traditional impeller assemblies, the reinforcing disc effectively distributes the alternating stress and friction borne by the rear bearing plate during operation.

Description

Technical Field

[0001] This utility model relates to the field of turbocharger impeller technology, specifically to a centrifugal turbocharger impeller assembly. Background Technology

[0002] In the field of modern internal combustion engine technology, centrifugal turbochargers have become a key component for improving engine performance due to their significant advantages in effectively increasing engine power density, reducing fuel consumption, and decreasing exhaust emissions. As the core component of a centrifugal turbocharger, the performance and reliability of the impeller assembly directly determine the overall efficiency and service life of the turbocharger.

[0003] During operation, the impeller assembly of a centrifugal turbocharger must withstand the enormous centrifugal force generated by high-speed rotation, the thermal stress from high-temperature combustion gases, and complex hydrodynamic loads. The impeller shaft backplate, as a crucial component of the impeller assembly, not only plays a vital role in transmitting torque and supporting the impeller but also needs to maintain structural integrity and stability under harsh operating conditions. However, in practical applications, under long-term alternating stress and friction, the impeller shaft backplate is prone to fatigue cracks, plastic deformation, and other strength failures, which can shorten the impeller's service life and even lead to equipment malfunctions and safety hazards.

[0004] To this end, we propose a centrifugal turbocharger impeller assembly. Utility Model Content

[0005] The main objective of this invention is to provide a centrifugal turbocharger impeller assembly. By setting a positioning groove and a limiting component on the rear disc, combined with the retaining groove and limiting groove of the reinforcing disc, and the fixing with self-tapping screws, the structural strength of the rear disc is greatly enhanced. Compared with traditional impeller assemblies, the setting of the reinforcing disc effectively distributes the alternating stress and friction borne by the rear disc during operation, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A centrifugal turbocharger impeller assembly includes an impeller body, blades, and a rear shaft disc. The impeller body is mounted on one side of the rear shaft disc, and blades are provided on the outer side of the impeller body. A through hole is provided in the center of the rear shaft disc, and a positioning groove for installing a reinforcing disc is provided on the side of the rear shaft disc away from the impeller body. A sealing gasket is glued to the inner wall of the positioning groove. One side of the reinforcing disc is snapped into one side of the rear shaft disc. The reinforcing disc is fixedly connected to the rear shaft disc by self-tapping screws. A ring-shaped limiting member is provided in the center of the positioning groove. A limiting groove adapted to the limiting member is provided in the center of the side of the reinforcing disc near the rear shaft disc. A cylindrical hollow bushing is provided in the center of the side of the reinforcing disc away from the rear shaft disc.

[0008] The bushing has a slot for installing the reinforcing sleeve on the outer side near the reinforcing disc, and a threaded groove for installing the locking sleeve on the outer side away from the reinforcing disc. The locking sleeve is threadedly connected to the outer side of the bushing, and one end of the locking sleeve abuts against one end of the reinforcing sleeve.

[0009] By adopting the above technical solution, and by setting positioning grooves and limiting components on the rear shaft plate, in conjunction with the retaining plate's slots and limiting grooves, and fixing with self-tapping screws, the structural strength of the rear shaft plate is greatly enhanced. Compared with traditional impeller assemblies, the setting of the reinforcing plate effectively distributes the alternating stress and friction that the rear shaft plate bears during operation, reducing the probability of fatigue cracks, plastic deformation and other strength failures of the rear shaft plate, significantly improving the service life of the impeller assembly, and reducing the risk of equipment failure and safety hazards caused by impeller assembly failure.

[0010] Specifically, the reinforcing disc is a horizontally arranged disc-shaped structure, and a connecting hole that passes through the bushing is provided in the center of the reinforcing disc.

[0011] Specifically, the outer edge of the reinforcing disc is provided with a groove that matches one side of the rear disc.

[0012] Specifically, a ring-shaped reinforcing plate is fixedly fitted on the outer side of the reinforcing sleeve near the reinforcing disc.

[0013] Specifically, one side of the reinforcing plate is fixedly connected to the outside of the reinforcing sleeve by reinforcing ribs, and multiple sets of reinforcing ribs are provided opposite each other.

[0014] Specifically, the reinforcing sleeve is a cylindrical hollow structure, and the inner wall of the reinforcing sleeve is fixedly connected with an insert that matches the slot. Both the insert and the slot are provided with multiple sets.

[0015] The beneficial effects of this utility model are as follows: The centrifugal turbocharger impeller assembly described in this utility model greatly enhances the structural strength of the rear shaft plate by setting a positioning groove and limiting component on the rear shaft plate, cooperating with the retaining plate's slot and limiting groove, and fixing it with self-tapping screws. Compared with traditional impeller assemblies, the setting of the reinforcing plate effectively distributes the alternating stress and friction borne by the rear shaft plate during operation, reducing the probability of fatigue cracks, plastic deformation and other strength failures of the rear shaft plate, significantly improving the service life of the impeller assembly, and reducing the risk of equipment failure and safety hazards caused by impeller assembly failure.

[0016] The fit between the slot on the bushing and the reinforcing sleeve insert, along with the fastening effect of the locking sleeve, further enhances the stability and reliability of the bushing. The design of the reinforcing plate and reinforcing rib on the reinforcing sleeve strengthens the overall strength of the reinforcing sleeve, enabling the bushing to maintain a good shape during high-speed rotation, ensuring the accuracy and stability of power transmission in the impeller assembly, thereby improving the overall working efficiency of the centrifugal turbocharger. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a perspective view of the reinforcing disc of this utility model;

[0020] Figure 3 This is a perspective view of the bushing of this utility model;

[0021] Figure 4 This is a perspective view of the reinforcing sleeve of this utility model;

[0022] In the diagram: 1. Impeller body; 2. Blade; 3. Shaft rear plate; 301. Through hole; 4. Limiting component; 5. Positioning groove; 6. Sealing gasket; 7. Reinforcing disc; 8. Reinforcing plate; 9. Locking sleeve; 10. Shaft sleeve; 11. Limiting groove; 12. Slot; 13. Slot; 14. Threaded groove; 15. Reinforcing sleeve; 16. Insert bar; 17. Reinforcing rib; 18. Self-tapping screw. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] As one embodiment of this utility model, such as Figures 1-4 As shown, the centrifugal turbocharger impeller assembly of this utility model includes an impeller body 1, blades 2, and a rear shaft plate 3. The impeller body 1 is installed on one side of the rear shaft plate 3. Blades 2 are provided on the outer side of the impeller body 1. A through hole 301 is provided in the center of the rear shaft plate 3. A positioning groove 5 for installing a reinforcing plate 7 is provided on the side of the rear shaft plate 3 away from the impeller body 1. A sealing gasket 6 is glued to the inner wall of the positioning groove 5. One side of the reinforcing plate 7 is snapped into one side of the rear shaft plate 3. The reinforcing plate 7 is fixedly connected to the rear shaft plate 3 by self-tapping screws 18. A ring-shaped limiting member 4 is provided in the center of the positioning groove 5. A limiting groove 11 adapted to the limiting member 4 is provided in the center of the side of the reinforcing plate 7 near the rear shaft plate 3. A cylindrical hollow bushing 10 is provided in the center of the side of the reinforcing plate 7 away from the rear shaft plate 3.

[0025] The bushing 10 has a slot 13 for installing the reinforcing sleeve 15 on the outer side near the reinforcing disc 7. The bushing 10 has a threaded groove 14 for installing the locking sleeve 9 on the outer side away from the reinforcing disc 7. The locking sleeve 9 is threadedly connected to the outer side of the bushing 10, and one end of the locking sleeve 9 abuts against one end of the reinforcing sleeve 15.

[0026] In use, the rear shaft disc 3 and the reinforcing disc 7 work together to transmit torque and support the impeller. The reinforcing disc 7 enhances the structural strength of the rear shaft disc 3, enabling it to maintain better structural integrity and stability when subjected to centrifugal force generated by high-speed rotation, thermal stress of high-temperature gas, and complex fluid dynamic loads. The reinforcing sleeve 15 and the locking sleeve 9 further reinforce the shaft sleeve 10, ensuring that the shaft sleeve 10 will not loosen or deform during operation, thus guaranteeing the stable operation of the impeller assembly.

[0027] The present invention also includes that the reinforcing disk 7 is a horizontally arranged disc-shaped structure, and the reinforcing disk 7 has a connecting hole in the center that communicates with the bushing 10.

[0028] This utility model also includes a groove 12 at the outer edge of the reinforcing disc 7 that is adapted to one side of the rear disc 3.

[0029] This utility model also includes a reinforcing plate 8 with a circular structure fixedly sleeved on the outer side of the reinforcing sleeve 15 near the reinforcing disc 7.

[0030] This utility model also includes that one side of the reinforcing plate 8 is fixedly connected to the outside of the reinforcing sleeve 15 by a reinforcing rib 17, and multiple sets of the reinforcing rib 17 are provided opposite to each other.

[0031] The present invention also includes that the reinforcing sleeve 15 is a cylindrical hollow structure, and the inner wall of the reinforcing sleeve 15 is fixedly connected with an insert 16 adapted to the slot 13, and both the insert 16 and the slot 13 are provided with multiple sets.

[0032] In use, the sealing gasket 6 is first glued to the inner wall of the positioning groove 5 of the rear shaft plate 3. The side of the reinforcing plate 7 with the slot 12 is then engaged with the corresponding side of the rear shaft plate 3. At this point, the limiting groove 11 on the reinforcing plate 7 and the limiting member 4 at the center of the positioning groove 5 are mutually compatible. Through the cooperation of the limiting member 4 and the limiting groove 11, the reinforcing plate 7 can be initially positioned. Then, self-tapping screws 18 are used to pass through the reinforcing plate 7 and fix it to the rear shaft plate 3, completing the installation of the reinforcing plate 7. When installing the reinforcing sleeve 15, align the insert 16 on the inner wall of the reinforcing sleeve 15 with the slot 13 on the bushing 10. Through multiple sets of engagement between the insert 16 and the slot 13, the reinforcing sleeve 15 can be securely inserted into the slot 13 of the bushing 10, thus achieving the initial installation of the reinforcing sleeve 15 and the bushing 10. Then, screw the locking sleeve 9 onto the end of the bushing 10 with the threaded groove 14. As the locking sleeve 9 is screwed in, one end of it gradually abuts against one end of the reinforcing sleeve 15, thereby firmly fixing the reinforcing sleeve 15 onto the bushing 10.

[0033] The rear shaft disc 3 and the reinforcing disc 7 work together to transmit torque and support the impeller. The reinforcing disc 7 enhances the structural strength of the rear shaft disc 3, enabling it to maintain better structural integrity and stability when subjected to centrifugal force generated by high-speed rotation, thermal stress of high-temperature gas, and complex fluid dynamic loads. The reinforcing sleeve 15 and the locking sleeve 9 further reinforce the shaft sleeve 10, ensuring that the shaft sleeve 10 will not loosen or deform during operation, thus guaranteeing the stable operation of the impeller assembly.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A centrifugal turbocharger impeller assembly, characterized in that, The impeller includes an impeller body (1), blades (2), and a rear shaft disc (3). The impeller body (1) is mounted on one side of the rear shaft disc (3). Blades (2) are provided on the outer side of the impeller body (1). A through hole (301) is provided in the center of the rear shaft disc (3). A positioning groove (5) for installing a reinforcing disc (7) is provided on the side of the rear shaft disc (3) away from the impeller body (1). A sealing gasket (6) is glued to the inner wall of the positioning groove (5). The reinforcing disc (7) 7) One side is engaged with the rear plate (3) on the same side. The reinforcing plate (7) is fixedly connected to the rear plate (3) by self-tapping screws (18). The positioning groove (5) is provided with a ring-shaped limiting member (4) in the center. The reinforcing plate (7) is provided with a limiting groove (11) that matches the limiting member (4) in the center on the side close to the rear plate (3). The reinforcing plate (7) is provided with a cylindrical hollow bushing (10) in the center on the side away from the rear plate (3). The bushing (10) has a slot (13) for installing the reinforcing sleeve (15) on the outer side near the reinforcing disc (7). The bushing (10) has a threaded groove (14) for installing the locking sleeve (9) on the outer side away from the reinforcing disc (7). The locking sleeve (9) is threadedly connected to the outer side of the bushing (10), and one end of the locking sleeve (9) abuts against one end of the reinforcing sleeve (15).

2. The centrifugal turbocharger impeller assembly according to claim 1, characterized in that, The reinforcing disc (7) is a horizontally arranged disc-shaped structure, and the reinforcing disc (7) has a connecting hole in the center that communicates with the bushing (10).

3. The centrifugal turbocharger impeller assembly according to claim 1, characterized in that, The outer edge of the reinforcing disc (7) is provided with a slot (12) that is adapted to one side of the rear disc (3).

4. The centrifugal turbocharger impeller assembly according to claim 1, characterized in that, The reinforcing sleeve (15) has a ring-shaped reinforcing plate (8) fixedly fitted on the outer side of the end near the reinforcing disc (7).

5. A centrifugal turbocharger impeller assembly according to claim 4, characterized in that, The reinforcing plate (8) is fixedly connected to the outside of the reinforcing sleeve (15) on one side by reinforcing ribs (17), and multiple sets of reinforcing ribs (17) are provided opposite to each other.

6. A centrifugal turbocharger impeller assembly according to claim 5, characterized in that, The reinforcing sleeve (15) is a cylindrical hollow structure. The inner wall of the reinforcing sleeve (15) is fixedly connected with an insert (16) that is compatible with the slot (13). Both the insert (16) and the slot (13) are provided with multiple sets.

Images