Bearing shell sealing performance test device

Abstract

The utility model relates to the technical field of turbochargers, in particular to a bearing shell sealing performance testing device. Comprising a small-end sealing unit, a first lateral sealing unit, a large-end sealing unit and a second lateral sealing unit, the small-end sealing unit is arranged in a small-end step through hole of the bearing shell, the large-end sealing unit is arranged in a large-end step through hole of the bearing shell, the first lateral sealing unit is arranged at the end, close to a water and oil inlet, of the bearing shell, and the second lateral sealing unit is arranged at the end, close to a water and oil outlet, of the bearing shell. And the second lateral sealing unit is arranged at one end, far away from the water and oil inlet, of the bearing shell. Through the structure, the sealing performance and integrity of the oil inlet and return hole, the water inlet and return hole and the surface of the shell of the bearing shell are efficiently detected in a water pumping manner; and leakage risks caused by possible oil inlet and return hole sealing, improper water inlet and return hole sealing and shell casting defects can be found in time.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, in particular to a bearing shell sealing test device. Background Art

[0002] The structure of a turbocharger includes a turbine housing, a compressor housing, a bearing housing, a turbine, a compressor impeller, a floating bearing, an exhaust bypass valve, and an actuator. The turbine and the compressor impeller are connected by a turbine shaft and are respectively installed in the turbine housing and the compressor housing through two floating bearings. The bearing housing has oil passages for lubricating and cooling the bearings, as well as a sealing device to prevent oil from leaking into the compressor or turbine. The turbine exhaust impeller, the compressor impeller, the sealing sleeve and other parts are installed on the supercharger shaft to form the supercharger rotor. The exhaust gas pressure from the exhaust pipe causes the turbine to rotate at high speed, and the pump wheel on the same axis rotates accordingly, and the intake air is compressed into the cylinder.

[0003] Since the rotor is directly impacted by the exhaust gas and becomes very hot, the turbocharger often works at high speed and high temperature. The temperature of the exhaust gas turbine end of the turbocharger is about 600℃, and the turbocharger rotor rotates at a high speed of 8000~11000r / min. Therefore, in order to ensure the normal operation of the turbocharger, reliable lubrication and cooling are required. The bearing shell of the turbocharger generally has oil inlet and return holes and water inlet and return holes for connecting with the engine oil and coolant, so as to achieve cooling and lubrication of the turbocharger and enable the turbocharger to work in a relatively stable environment.

[0004] Once the bearing shell leaks oil or water, it will destroy the stability of the turbocharger working environment and affect the product safety and reliability. The sealing detection of the water cavity and oil cavity of the bearing shell is particularly important. Therefore, a bearing shell sealing test device is proposed, which aims to efficiently detect the sealing and integrity of the oil inlet and return holes, water inlet and return holes and the shell surface of the bearing shell by pumping water, and timely discover the leakage risks caused by the possible oil inlet and return hole sealing, the water inlet and return hole sealing and the shell casting defects. Summary of the invention

[0005] The utility model aims to provide a bearing shell sealing test device, which is designed to efficiently detect the sealing and integrity of the oil inlet and return holes, water inlet and return holes and the shell surface of the bearing shell by pumping water, so as to timely discover the leakage risks caused by the possible oil inlet and return hole sealing, the water inlet and return hole sealing and the shell casting defects.

[0006] To achieve the above-mentioned purpose, the utility model adopts a bearing shell sealing test device, including a small end sealing unit, a first lateral sealing unit, a large end sealing unit and a second lateral sealing unit, the small end sealing unit is arranged at the small end step through hole of the bearing shell, the large end sealing unit is arranged at the large end step through hole of the bearing shell, the first lateral sealing unit is arranged at one end of the bearing shell close to the water inlet and oil port, and the second lateral sealing unit is arranged at one end of the bearing shell away from the water inlet and oil port.

[0007] Wherein, the small end sealing unit comprises a small end sealing plate and a small end gasket, the small end sealing plate is arranged in the small end step through hole of the bearing shell, and the small end gasket is arranged between the small end sealing plate and the bearing shell.

[0008] Wherein, the first lateral sealing unit includes a first side sealing gasket and a first side sealing cover plate, the first side sealing cover plate is arranged at one end of the bearing shell close to the water inlet and oil port, and the first side sealing gasket is arranged between the first side sealing gasket and the bearing shell.

[0009] Among them, the big end sealing unit includes a big end sealing gasket, a big end sealing plate, a small end sealing gasket, a cap nut and a connecting screw. The big end sealing plate is arranged in the big end step through hole of the bearing shell, and the big end sealing gasket is arranged between the big end sealing plate and the bearing shell. One end of the connecting screw passes through the big end sealing plate and the bearing shell in sequence, and is inserted into the small end sealing plate. The cap nut is threadedly connected to the other end of the connecting screw, and the small end sealing gasket is arranged between the cap nut and the bearing shell.

[0010] Wherein, the second lateral sealing unit includes a second side sealing gasket and a second side sealing cover plate, the second side sealing cover plate is arranged at an end of the bearing shell away from the water inlet and the oil port, and the second side sealing gasket is arranged between the second side sealing cover plate and the bearing shell.

[0011] The utility model discloses a bearing shell sealing test device, wherein the small-end sealing unit is used to seal the small-end stepped through hole of the bearing shell, the large-end sealing unit is used to seal the large-end stepped through hole of the bearing shell, the first lateral sealing unit is used to seal the end of the bearing shell close to the water inlet and oil port, and the second lateral sealing unit is used to seal the water return and one end of the oil port of the bearing shell. The sealing and integrity of the oil inlet and return holes, the water inlet and return holes and the shell surface of the bearing shell are efficiently tested in the form of water pumping, so that the leakage risks caused by the inadequate sealing of the oil inlet and return holes and the inadequate sealing of the water inlet and return holes and the casting defects of the shell are discovered in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 The utility model is a structural schematic diagram of a bearing shell sealing test device.

[0014] Figure 2 It is a structural schematic diagram of the first side sealing cover plate of the utility model.

[0015] Figure 3 It is a structural schematic diagram of the second side sealing cover plate of the utility model.

[0016] 100-bearing housing, 101-small end sealing plate, 102-small end gasket, 103-first side sealing gasket, 104-first side sealing cover plate, 105-large end sealing gasket, 106-large end sealing plate, 107-small end sealing gasket, 108-cap nut, 109-connecting screw, 110-second side sealing gasket, 111-second side sealing cover plate. DETAILED DESCRIPTION

[0017] See also Figure 1~Figure 3 ,in Figure 1 It is a structural diagram of the bearing shell sealing test device. Figure 2 is a schematic diagram of the structure of the first side sealing cover plate, Figure 3 Schematic diagram of the structure of the second side sealing cover plate.

[0018] The utility model provides a bearing shell sealing test device: comprising a small-end sealing unit, a first lateral sealing unit, a large-end sealing unit and a second lateral sealing unit, the small-end sealing unit is arranged at the small-end step through hole of the bearing shell 100, the large-end sealing unit is arranged at the large-end step through hole of the bearing shell 100, the first lateral sealing unit is arranged at one end of the bearing shell 100 close to the water inlet and the oil port, and the second lateral sealing unit is arranged at one end of the bearing shell 100 away from the water inlet and the oil port.

[0019] In this embodiment, the small-end sealing unit is used to seal the small-end step through hole of the bearing shell 100, the large-end sealing unit is used to seal the large-end step through hole of the bearing shell 100, the first lateral sealing unit is used to seal the end of the bearing shell 100 close to the water inlet and oil port, and the second lateral sealing unit is used to seal the water return and oil port of the bearing shell 100. The sealing and integrity of the oil inlet and return holes, water inlet and return holes and the shell surface of the bearing shell 100 are efficiently tested by pumping water, so that the leakage risks caused by the inadequate sealing of the oil inlet and return holes and the casting defects of the shell can be discovered in time.

[0020] Furthermore, the small end sealing unit includes a small end sealing plate 101 and a small end gasket 102 . The small end sealing plate 101 is arranged in the small end step through hole of the bearing shell 100 . The small end gasket 102 is arranged between the small end sealing plate 101 and the bearing shell 100 .

[0021] Furthermore, the first lateral sealing unit includes a first side sealing gasket 103 and a first side sealing cover plate 104, the first side sealing cover plate 104 is arranged at one end of the bearing shell 100 close to the water inlet and oil port, and the first side sealing gasket 103 is arranged between the first side sealing gasket 103 and the bearing shell 100.

[0022] Furthermore, the big end sealing unit includes a big end sealing gasket 105, a big end sealing plate 106, a small end sealing gasket 107, a cap nut 108 and a connecting screw 109, the big end sealing plate 106 is arranged in the big end step through hole of the bearing shell 100, the big end sealing gasket 105 is arranged between the big end sealing plate 106 and the bearing shell 100, one end of the connecting screw 109 passes through the big end sealing plate 106 and the bearing shell 100 in sequence, and is inserted into the small end sealing plate 101, the cap nut 108 is threadedly connected to the other end of the connecting screw 109, and the small end sealing gasket 107 is arranged between the cap nut 108 and the bearing shell 100.

[0023] Furthermore, the second lateral sealing unit includes a second side sealing gasket 110 and a second side sealing cover plate 111, the second side sealing cover plate 111 is arranged at an end of the bearing shell 100 away from the water inlet and the oil port, and the second side sealing gasket 110 is arranged between the second side sealing cover plate 111 and the bearing shell 100.

[0024] In this embodiment, the small end sealing plate 101 and the small end gasket 102 are used to seal the small end step through hole of the bearing housing 100, the first side sealing gasket 103 and the first side sealing cover plate 104 are used to seal the end of the bearing housing 100 close to the water inlet and oil port, the large end sealing gasket 105, the large end sealing plate 106, the small end sealing gasket 107, the cap nut 108 and the connecting screw 109 are used to seal the large end step through hole of the bearing housing 100, and the second side sealing gasket 110 and the second side sealing cover plate 111 are used to seal the water return and one end of the oil port of the bearing housing 100. The sealing and integrity of the oil inlet and return holes, water inlet and return holes and the housing surface of the bearing housing 100 are efficiently tested by pumping water, so as to timely discover the leakage risks caused by the inadequate sealing of the oil inlet and return holes and the inadequate sealing of the water inlet and return holes and the casting defects of the housing.

[0025] According to the sealing test requirements of a certain 151-type turbocharger bearing housing 100, the pressure is 0.75MPa and the pressure holding time is 3min. A through hole with a diameter of 16mm is reserved on the first side sealing cover plate 104 for subsequent connection with the pumping device of the test bench for water injection and sealing detection; the second side sealing cover plate 111 is connected to the large end sealing cover plate through two M8 screws on the diagonal line; the large end sealing plate 106 and the small end sealing plate 101 are connected together through the connecting screw 109. In order to ensure the strength and rigidity of the detection device, after the connecting screw 109 is screwed into the small end sealing plate 10115mm, spot welding is used around the connection to fix it. When the bearing housing sealing test device is used, the specific steps are as follows: first, use two hexagon socket screws to connect the first side sealing cover plate 104 and the second side sealing cover plate 111 and their gaskets to the bearing housing 100, and seal the two sides of the bearing housing 100, leaving only the through hole on the first side sealing cover plate 104. Place the small end sealing plate 101 and the connecting screw 109 welded together on the platform, with the connecting screw 109 facing upward, the small end of the bearing housing 100 facing downward, and the small end bearing stop through hole aligned with the connecting screw 109. The connecting screw 109 passes through the central diameter 20.5mm through hole of the large end sealing plate 106, and the cap nut 108 described in GB923-88 is used, and the cap nut 108 is continuously tightened with a torque wrench until the tightening torque reaches 28N.m. Use a water injection gun on a water pump workbench to inject water into the water cavity and oil cavity of the bearing shell 100, continue to pressurize and observe the value of the pressure gauge on the workbench. When the water pressure reaches 0.75MPa, stabilize the pressure for 3 minutes, and observe whether there is leakage and water seepage at the water inlet and outlet (oil return port) of the bearing shell 100 and the surface of the bearing shell 100. If there is leakage and water seepage on the shell surface and the connection port, the sealing test of the bearing shell 100 fails; if there is no leakage or water seepage on the shell surface and the connection ports, and the water pressure is stable at 0.75Mpa for 3 minutes, the sealing test of the bearing shell 100 passes. Stop water injection, release the pressure, remove the various components of the detection device, and continue to use the above method to perform the sealing test of the water cavity and oil cavity of the next bearing shell 100.

[0026] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A bearing housing sealing test device, characterized in that: It includes a small-end sealing unit, a first lateral sealing unit, a large-end sealing unit and a second lateral sealing unit. The small-end sealing unit is arranged at the small-end step through hole of the bearing shell, the large-end sealing unit is arranged at the large-end step through hole of the bearing shell, the first lateral sealing unit is arranged at one end of the bearing shell close to the water inlet and the oil port, and the second lateral sealing unit is arranged at one end of the bearing shell away from the water inlet and the oil port.

2. The bearing housing sealing test device according to claim 1, characterized in that: The small end sealing unit comprises a small end sealing plate and a small end gasket. The small end sealing plate is arranged at the small end step through hole of the bearing shell. The small end gasket is arranged between the small end sealing plate and the bearing shell.

3. The bearing housing sealing test device according to claim 1, characterized in that: The first lateral sealing unit includes a first side sealing gasket and a first side sealing cover plate. The first side sealing cover plate is arranged at one end of the bearing shell close to the water inlet and oil port. The first side sealing gasket is arranged between the first side sealing gasket and the bearing shell.

4. The bearing housing sealing test device according to claim 2, characterized in that: The big end sealing unit includes a big end sealing gasket, a big end sealing plate, a small end sealing gasket, a cap nut and a connecting screw. The big end sealing plate is arranged in the big end step through hole of the bearing shell, and the big end sealing gasket is arranged between the big end sealing plate and the bearing shell. One end of the connecting screw passes through the big end sealing plate and the bearing shell in sequence, and is inserted into the small end sealing plate. The cap nut is threadedly connected to the other end of the connecting screw, and the small end sealing gasket is arranged between the cap nut and the bearing shell.

5. The bearing housing sealing test device according to claim 1, characterized in that: The second lateral sealing unit includes a second side sealing gasket and a second side sealing cover plate. The second side sealing cover plate is arranged at an end of the bearing shell away from the water inlet and the oil port. The second side sealing gasket is arranged between the second side sealing cover plate and the bearing shell.

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