Bearing box for detecting dry gas seal performance of compressor

Abstract

The utility model discloses a bearing box for detecting dry gas seal performance of compressor, including main shaft, bearing seat, bearing group, cover assembly and protective cover, the main shaft sets up in bearing seat, and the left and right ends of main shaft protrude and set up in the left and right sides of bearing seat, and the bearing group is set up on the main shaft and is used for supporting the rotation of main shaft in bearing seat, cover assembly is set up on the main shaft and is used for closing the left and right sides of bearing seat, the protective cover sets up in the left side of bearing seat, and the protective cover is provided with the bolt, and the limit slot is set up below the bolt on the main shaft, and the bolt inserts the limit slot and fixes the main shaft for the installation of dry gas seal spare of right end of main shaft, the main shaft of bearing box is fixed with the bolt, and the rear end dry gas seal spare is installed, and the one -way thrust bearing is set up on the main shaft, and the one -way thrust bearing can offset the axial force of dry gas seal spare, and the end of main shaft can rotate stably, and the safety when dry gas seal spare detects is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of dry gas sealing component testing technology, specifically relating to a bearing housing for testing the dry gas sealing performance of a compressor. Background Technology

[0002] Dry gas seals are typically used in compressors. These are non-contact shaft seals that utilize fluid dynamics principles, achieving non-contact operation by creating dynamic pressure grooves on the sealing end face. A dry gas seal consists of a rotating ring, a stationary ring, a spring seat, and a bushing. When the rotating ring rotates, the sealing gas is drawn into the dynamic pressure groove and flows along it. To ensure compressor quality, performance testing of the dry gas seal is necessary. Testing requires a motor to drive the seal at high speed. However, the motor's speed is limited, necessitating a speed increaser to raise the final speed. A bearing housing is also needed to ensure smooth rotation of the rotating ring. The rotating ring generates a significant axial force on the bearing housing's main shaft, requiring modifications to the bearing housing to balance this axial force. Utility Model Content

[0003] The purpose of this utility model is to provide a bearing housing for testing the dry gas seal performance of a compressor. By improving the structure of the bearing housing, a protective cover is provided on one side of the bearing housing, and a pin is provided on the protective cover. The main shaft of the bearing housing is fixed by the pin, which facilitates the installation of the dry gas seal at the rear end. A one-way thrust bearing is sleeved on the main shaft. The one-way thrust bearing can counteract the axial force generated by the dry gas seal, so that the end of the main shaft can rotate smoothly and ensure the safety of the dry gas seal during testing.

[0004] This utility model is achieved through the following technical solution:

[0005] A bearing housing for testing the dry gas sealing performance of a compressor includes a main shaft, a bearing housing, a bearing assembly, a cover assembly, and a protective cover. The main shaft is disposed within the bearing housing, with its left and right ends protruding from the left and right sides of the bearing housing. The bearing assembly is fitted onto the main shaft and supports its rotation within the bearing housing. The cover assembly is fitted onto the main shaft and seals the left and right sides of the bearing housing. The protective cover is disposed on the left side of the bearing housing, fitted onto the main shaft, and connected to the bearing housing. The left end of the main shaft protrudes from the outside of the protective cover. A pin is provided on the protective cover, and a limiting groove is provided on the main shaft below the pin. The pin is inserted into the limiting groove to fix the main shaft for the installation of a dry gas seal on the right end of the main shaft.

[0006] Preferably, the bearing assembly includes a first bearing, a second bearing, and a third bearing. The first bearing is sleeved on the left side of the main shaft and located between the main shaft and the bearing housing. The second and third bearings are sleeved side by side on the right side of the main shaft and located between the main shaft and the bearing housing. The second bearing is located on the side closer to the first bearing. The first bearing is a one-way thrust bearing.

[0007] Preferably, the capping assembly includes a first capping assembly and a second capping assembly, wherein the first capping assembly is disposed on the left side of the main shaft and abuts against the first bearing; and the second capping assembly is disposed on the right side of the main shaft and abuts against the second and third bearings.

[0008] Preferably, the first sealing assembly includes a first sealing cover, an oil slinger, and a first self-locking nut. The oil slinger is sleeved on the main shaft and abuts against the side of the first bearing. The first sealing cover is sleeved on the oil slinger and also abuts against the side of the first bearing. The first sealing cover is connected to the bearing seat. The first self-locking nut is threaded to the main shaft and located outside the oil slinger. The first self-locking nut is used to axially limit the oil slinger.

[0009] Preferably, the second sealing assembly includes a second sealing cap and a second self-locking nut. The second self-locking nut is disposed on the side of the second bearing and threadedly connected to the spindle. The second sealing cap is sleeved on the spindle and abuts against the side of the third bearing. The second sealing cap is connected to the bearing housing.

[0010] Preferably, a temperature transmitter is installed on the bearing housing at the positions of the first bearing and the second bearing.

[0011] Preferably, the bearing housing has a first lubricating oil inlet at the position of the first bearing, and a second lubricating oil inlet and a third lubricating oil inlet at the position near the second bearing.

[0012] Preferably, the bearing housing is provided with a cover plate, and the cover plate is movably connected to the bearing housing.

[0013] Preferably, the cover plate is provided with an air cap, which is used to keep the pressure inside and outside the bearing housing consistent.

[0014] Preferably, a viewing window is provided on the side of the bearing housing.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0016] 1) In this utility model, by improving the structure of the bearing housing, a protective cover is provided on one side of the bearing housing, and a pin is provided on the protective cover. The main shaft of the bearing housing is fixed by the pin, which facilitates the installation of the rear dry gas seal. A one-way thrust bearing is sleeved on the main shaft. The one-way thrust bearing can counteract the axial force generated by the dry gas seal, so that the end of the main shaft can rotate smoothly and ensure the safety of the dry gas seal during testing.

[0017] 2) In this utility model, temperature transmitters are installed on the bearing housing of the bearing box at the positions of the first bearing and the second bearing, which can monitor the bearing temperature in real time, control the temperature, and avoid excessive temperature leading to spindle wear. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a partial sectional view of the bearing housing in this utility model.

[0020] Figure 2 This is a side view of the bearing housing in this utility model.

[0021] Figure 3 This is a schematic diagram of the assembly structure of the bearing housing in this utility model.

[0022] Wherein: 1-Bearing housing, 11-Temperature transmitter, 12-Air cap, 13-First lubricating oil inlet, 14-Second lubricating oil inlet, 15-Third lubricating oil inlet, 16-Cover plate, 17-Lubricating oil outlet, 18-Viewing window, 2-Main shaft, 21-Limiting groove, 3-Protective cover, 31-Pin, 32-Overflow port, 4-First sealing assembly, 41-First sealing cover, 42-Oil slinger, 43-First self-locking nut, 5-Second sealing assembly, 51-Second sealing cover, 52-Second self-locking nut, 6-First bearing, 7-Second bearing, 8-Third bearing, 9-Increase speed increaser, 10-Drive motor. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] Example 1:

[0025] A bearing housing for testing the dry gas sealing performance of a compressor, such as Figure 1 , Figure 2 and Figure 3 As shown, the assembly includes a main shaft 2, a bearing housing 1, a bearing assembly, a cover assembly, and a protective cover 3. The main shaft 2 is housed within the bearing housing 1, which is an irregular cylindrical structure with openings at its front, rear, and top. The top opening is closed by a cover plate 16, which is bolted to the bearing housing 1. The cover plate 16 has eye bolts for transporting the bearing housing. The main shaft 2 protrudes from both ends of the bearing housing 1. The bearing assembly is fitted onto the main shaft 2 and supports its rotation within the bearing housing 1. A speed increaser 9 and a drive motor 10 are sequentially arranged outside the bearing housing. The speed increaser 9 is connected to both the drive motor 10 and the main shaft 2 of the bearing housing via couplings. The drive motor 10 provides power to rotate the gears in the speed increaser 9, increasing the final speed and thus driving the bearing housing... The main shaft 2 rotates at high speed, ultimately driving the rotating ring of the dry gas seal to rotate for observation and testing. The cover assembly is fitted onto the main shaft 2 and used to seal the left and right sides of the bearing housing 1 to prevent lubricating oil leakage from the bearing housing 1. The protective cover 3 is located on the left side of the bearing housing 1, fitted onto the main shaft 2 and connected to the bearing housing 1. The left end of the main shaft 2 protrudes outside the protective cover 3. The protective cover 3 is provided with a pin 31. The main shaft 2 is provided with a limiting groove 21 below the pin 31. The pin 31 is inserted into the limiting groove 21 to fix the main shaft 2 for the installation of the dry gas seal on the right end of the main shaft 2. When installing the dry gas seal, the main shaft 2 needs to be fixed. Therefore, by inserting the pin 31, the main shaft 2 cannot rotate, which facilitates the installation of the dry gas seal on the other end of the main shaft 2.

[0026] like Figure 1 and Figure 2As shown, the bearing assembly includes a first bearing 6, a second bearing 7, and a third bearing 8. The first bearing 6 is sleeved on the left side of the main shaft 2 and located between the main shaft 2 and the bearing housing 1. The second bearing 7 and the third bearing 8 are sleeved side by side on the right side of the main shaft 2 and located between the main shaft 2 and the bearing housing 1. The second bearing 7 is located on the side closer to the first bearing 6. The second bearing 7 and the third bearing 8 are ordinary ball bearings, and the first bearing 6 is a one-way thrust bearing. When the rotating ring of the dry gas seal rotates at high speed, it will generate axial force. The one-way thrust bearing can counteract the axial force generated by the dry gas seal, so that the main shaft 2 rotates stably. Temperature transmitters 11 are installed on the bearing housing 1 at the positions of the first bearing 6 and the second bearing 7, allowing observation of the temperatures of the first bearing 6, the second bearing 7, and the third bearing 8. Additionally, a first lubricating oil inlet 13 is located at the position of the first bearing 6 on the bearing housing 1, and a second lubricating oil inlet 14 and a third lubricating oil inlet 15 are located near the second bearing 7. All three inlets are connected to an external oil pump for supplying lubricating oil. A lubricating oil outlet 17 is located on the bottom side of the bearing housing 1, connected to an external oil tank for oil return, ensuring the lubricating oil is circulated and supplied to the bearing housing 1, thereby lubricating the first bearing 6, the second bearing 7, the third bearing 8, and the main shaft 2. An air cap 12 is provided on the cover plate 16. The air cap 12 is used to keep the internal and external pressures of the bearing housing 1 consistent, so that the internal and external pressures of the bearing housing 1 are balanced. A viewing window 18 is provided on the side of the bearing housing 1, through which the lubricating oil condition inside the bearing housing 1 and the rotation of the bearing can be observed.

[0027] Example 2:

[0028] This embodiment further defines the sealing component based on the above embodiments, such as... Figure 1 As shown, the sealing assembly includes a first sealing cover 41 assembly 4 and a second sealing cover 51 assembly 5. The first sealing cover 41 assembly 4 is located on the left side of the main shaft 2 and abuts against the first bearing 6; the second sealing cover 51 assembly 5 is located on the right side of the main shaft 2 and abuts against the second and third bearings 8. The first sealing cover 41 assembly 4 includes a first sealing cover 41, an oil slinger 42, and a first self-locking nut 43. The oil slinger 42 is sleeved on the main shaft 2 and abuts against the side of the first bearing 6. The first sealing cover 41 is sleeved on the oil slinger 42 and also abuts against the side of the first bearing 6. The first sealing cover 41 is bolted to the bearing seat 1. The first self-locking nut 43 is threaded to the main shaft 2 and located outside the oil slinger 42. The first self-locking nut 43 is used to axially limit the oil slinger 42. An overflow port 32 for lubricating oil is provided at the bottom of the protective cover 3. The overflow port 32 is connected to the oil tank. The lubricating oil flowing down from the position of the oil slinger 42 can circulate back to the oil tank.

[0029] The second cover assembly 51 includes a second cover 51 and a second self-locking nut 52. The second self-locking nut 52 is disposed on the side of the second bearing 7 and threadedly connected to the main shaft 2. The second cover 51 is sleeved on the main shaft 2 and abuts against the side of the third bearing 8. The second cover 51 is bolted to the bearing seat 1. The second self-locking nut 52 cooperates with the second cover 51 to fix the second bearing 7 and the third bearing 8 on the main shaft 2, ensuring the stability of the rotation of the main shaft 2. Other parts of this embodiment are the same as those in the above embodiment, and will not be described again here.

[0030] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A bearing housing for testing the dry gas sealing performance of a compressor, characterized in that, The device includes a spindle, bearing housing, bearing assembly, cover assembly, and protective cover. The spindle is housed within the bearing housing, with both ends protruding from the bearing housing on the left and right sides. The bearing assembly is fitted onto the spindle and supports its rotation within the bearing housing. The cover assembly is fitted onto the spindle and seals the left and right sides of the bearing housing. The protective cover is located on the left side of the bearing housing, fitted onto the spindle, and connected to the bearing housing. The left end of the spindle protrudes from the outside of the protective cover. A pin is provided on the protective cover, and a limiting groove is provided on the spindle below the pin. The pin is inserted into the limiting groove to fix the spindle for the installation of a dry gas seal on the right end of the spindle.

2. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 1, characterized in that, The bearing assembly includes a first bearing, a second bearing, and a third bearing. The first bearing is sleeved on the left side of the main shaft and located between the main shaft and the bearing housing. The second and third bearings are sleeved side by side on the right side of the main shaft and located between the main shaft and the bearing housing. The second bearing is located on the side closer to the first bearing. The first bearing is a one-way thrust bearing.

3. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 2, characterized in that, The capping assembly includes a first capping assembly and a second capping assembly. The first capping assembly is located on the left side of the main shaft and abuts against a first bearing. The second capping assembly is located on the right side of the main shaft and abuts against a second and a third bearing.

4. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 3, characterized in that, The first sealing assembly includes a first sealing cover, an oil slinger, and a first self-locking nut. The oil slinger is sleeved on the main shaft and abuts against the side of the first bearing. The first sealing cover is sleeved on the oil slinger and also abuts against the side of the first bearing. The first sealing cover is connected to the bearing seat. The first self-locking nut is threaded to the main shaft and located outside the oil slinger. The first self-locking nut is used to limit the axial movement of the oil slinger.

5. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 3, characterized in that, The second sealing assembly includes a second sealing cap and a second self-locking nut. The second self-locking nut is disposed on the side of the second bearing and threadedly connected to the spindle. The second sealing cap is sleeved on the spindle and abuts against the side of the third bearing. The second sealing cap is connected to the bearing housing.

6. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 3, characterized in that, Temperature transmitters are installed on the bearing housing at the positions of the first and second bearings.

7. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 3, characterized in that, The bearing housing has a first lubricating oil inlet located at the position of the first bearing, and a second lubricating oil inlet and a third lubricating oil inlet located near the position of the second bearing.

8. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 1, characterized in that, The bearing housing is provided with a cover plate, which is movably connected to the bearing housing.

9. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 8, characterized in that, An air cap is provided on the cover plate, which is used to keep the pressure inside and outside the bearing housing consistent.

10. The bearing housing for testing the dry gas sealing performance of the compressor as described in claim 1, characterized in that, A viewing window is provided on the side of the bearing housing.

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