External carbon brush of centrifugal compressor
By designing an external carbon brush for centrifugal compressors, the automatic adjustment of the carbon brush and automatic forward movement after wear is achieved using the adjustment bracket assembly and elastic clamp, the untimely electrostatic discharge of the centrifugal compressor and carbon is solved. The problem of powder contamination of lubricating oil has achieved the effectiveness of electrostatic conduction and the convenience of maintenance.
Patent Information
- Application Number
- CN202420509406.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-03-15
AI Technical Summary
During operation, the centrifugal compressor produces high-voltage static electricity due to the friction between high-speed gas and impellers, volutes, pipes, etc., which causes static electricity to be unleaded in time, resulting in electrical corrosion of bearings, increased shaft displacement, increased bearing temperature, and increased shaft vibration. Such problems, and the built-in carbon brush maintenance is inconvenient, toner contaminates the lubricant oil system, increasing the frequency of oil filter replacement.
Design an external carbon brush for centrifugal compressor, including an adjustment bracket assembly and a fixed carbon brush assembly, to achieve automatic adjustment of carbon brushes and automatic wear after wear through axial adjustable bracket, radial adjustable bracket and elastic clamp Move forward to ensure that the carbon brush is in good contact with the compressor rotation shaft and complete electrostatic conduction.
The high-voltage electrostatic discharge of centrifugal compressors is realized, the maintenance process is simplified, the lubricant system is avoided, the oil filter replacement frequency is reduced, and labor and spare parts costs are reduced.
Smart Images
Figure CN222531021U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an external carbon brush for a centrifugal compressor. Background Art
[0002] During the operation of a centrifugal compressor, high-speed gas rubs against the impeller, volute, pipe, etc., generating high-voltage static electricity. If the static electricity is not discharged in time, it will cause many problems such as electrical corrosion of the compressor bearings, increased shaft displacement, increased bearing temperature, increased shaft vibration, etc., making the centrifugal compressor unable to operate stably. Currently, many centrifugal compressors are designed with static conductive carbon brushes that use built-in carbon brushes. On the one hand, maintenance and inspection are inconvenient, and the operating wear cannot be intuitively viewed. In particular, once a fault occurs, the machine must be shut down and the outer cover removed for thorough processing. On the other hand, the carbon powder after the carbon brush is worn enters the lubricating oil system to pollute the oil quality, increasing the frequency of oil filter element replacement, resulting in increased labor and spare parts costs. Summary of the invention
[0003] The utility model provides an external carbon brush for a centrifugal compressor, comprising an adjusting bracket assembly and a fixed carbon brush assembly; the adjusting bracket assembly comprises an axially adjustable bracket and a radially adjustable bracket; the fixed carbon brush assembly comprises a carbon brush, an elastic clamp, a carbon brush tail wire, a contact adjustment bracket, and a rectangular block, and an elastic component is installed inside the elastic clamp.
[0004] The carbon brush is clamped by an elastic clamp and connected to the outer end of the radially adjustable bracket through a rectangular block of the fixed clamp and a contact adjustment bracket.
[0005] The axially adjustable bracket and the radially adjustable bracket fix the fixed carbon brush assembly to the compressor housing, and when adjusted to a suitable position, the elastic clamp can automatically push the carbon brush forward to ensure good contact between the carbon brush and the rotating shaft of the centrifugal compressor.
[0006] The axially adjustable bracket is made of flat iron with rounded rectangular holes for adjusting the contact position between the carbon brush and the rotating shaft of the compressor, and the axially adjustable bracket is fixed to the bearing box housing of the compressor using bolts.
[0007] The radially adjustable bracket is made of flat iron and steel bars welded together, and a rounded rectangular hole is opened at the front end of the flat iron for adjusting the contact distance between the carbon brush and the rotating shaft of the compressor, and for connecting the radially adjustable bracket and the axially adjustable bracket with bolts. The angle between the radially adjustable bracket and the axially adjustable bracket is a right angle.
[0008] The contact adjustment bracket is made of 304 stainless steel and is connected to the radially adjustable bracket with bolts. It is used to fine-tune the contact position between the carbon brush and the compressor rotating shaft. At the same time, the elastic clamp and the carbon brush are inserted into the rectangular block groove of the contact adjustment bracket and fixed, so that after the carbon brush is worn, the contact adjustment bracket will not directly contact the centrifugal compressor rotating shaft, thereby avoiding damage to the compressor rotating shaft.
[0009] The carbon brush is inserted into an elastic clamp, and after the carbon brush is worn, the elastic clamp automatically pushes the carbon brush forward, ensuring that the carbon brush always maintains good contact with the rotating shaft of the compressor, thereby completing the static electricity extraction work.
[0010] The carbon brush can be replaced at any time after being worn.
[0011] The carbon brush tail is provided with a carbon brush tail wire, and the carbon brush tail wire is connected to the electrostatic grounding plate.
[0012] The beneficial effects of the utility model are as follows:
[0013] 1. The utility model uses an external carbon brush to conduct high-voltage static electricity in a centrifugal compressor. The utility model has the advantages of simple manufacturing, low investment, convenient replacement of carbon brushes, good conductivity, and ensures that the lubricating oil is not contaminated from the source, thus solving the disadvantage that the built-in carbon brush is not easy to inspect and repair.
[0014] 2. The external carbon brush for a centrifugal compressor provided by the utility model can change the sizes of the axially adjustable bracket, the radially adjustable bracket, and the contact adjustment bracket according to actual conditions, and can be applied to most centrifugal compressors.
[0015] 3. The utility model adopts an elastic clamp to fix the carbon brush. After the carbon brush is worn, the elastic clamp can automatically push the carbon brush forward to ensure that the carbon brush always maintains good contact with the rotating shaft of the compressor to complete the static electricity extraction work. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Schematic diagram of the installation of carbon brushes of the utility model.
[0017] Figure 2 Schematic diagram of the adjusting bracket assembly of the utility model.
[0018] Figure 3 Schematic diagram of the fixed carbon brush assembly of the utility model.
[0019] Figure 4 Schematic diagram of the elastic clamp of the utility model.
[0020] Notes in the figure: 1. Compressor bearing box, 2. Compressor rotating shaft, 3. Axially adjustable bracket, 4. Radial adjustable bracket, 5. Carbon brush, 6. Elastic clamp, 7. Carbon brush tail wire, 8. Contact adjustment bracket, 9. Elastic component, 10. Rectangular block. DETAILED DESCRIPTION
[0021] The embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.
[0022] Example 1
[0023] The utility model provides an external carbon brush for a centrifugal compressor, comprising an adjusting bracket assembly and a fixed carbon brush assembly; the adjusting bracket assembly comprises an axially adjustable bracket 3 and a radially adjustable bracket 4; the fixed carbon brush assembly comprises a carbon brush 5, an elastic clamp 6, a carbon brush tail wire 7, a contact adjustment bracket 8, and a rectangular block 10, and an elastic component 9 is installed inside the elastic clamp 6.
[0024] The carbon brush 5 is clamped by an elastic clamp 6 and connected to the outer end of the radially adjustable bracket 4 through a rectangular block 10 of the fixed clamp and a contact adjustment bracket 8 .
[0025] The axially adjustable bracket 3 and the radially adjustable bracket 4 fix the fixed carbon brush assembly to the compressor housing and are adjusted to a suitable position. The elastic clamp 6 can automatically push the carbon brush 5 forward to ensure that the carbon brush 5 is in good contact with the rotating shaft 2 of the centrifugal compressor.
[0026] The axially adjustable bracket 3 is made of flat iron with rounded rectangular holes for adjusting the contact position between the carbon brush 5 and the compressor rotating shaft 2, and the axially adjustable bracket 3 is fixed to the outer shell of the compressor bearing box 1 by bolts.
[0027] The radially adjustable bracket 4 is made of flat iron and steel bars welded together, and a rounded rectangular hole is opened at the front end of the flat iron, which is used to adjust the contact distance between the carbon brush 5 and the compressor rotating shaft 2, and to connect the radially adjustable bracket 4 and the axially adjustable bracket 3 with bolts. The angle between the radially adjustable bracket 4 and the axially adjustable bracket 3 is a right angle.
[0028] The contact adjustment bracket 8 is made of 304 stainless steel and is connected to the radially adjustable bracket 4 with bolts. It is used to fine-tune the contact position of the carbon brush 5 and the compressor rotating shaft 2. At the same time, the elastic clamp 6 and the carbon brush 5 are inserted into the groove of the rectangular block 10 of the contact adjustment bracket 8 and fixed, so that after the carbon brush is worn, the contact adjustment bracket 8 will not directly contact the centrifugal compressor rotating shaft 2, thereby avoiding damage to the compressor rotating shaft 2.
[0029] The carbon brush 5 is inserted into the elastic clamp 6. After the carbon brush 5 is worn, the elastic clamp 6 automatically pushes the carbon brush 5 forward to ensure that the carbon brush 5 always maintains good contact with the compressor rotating shaft 2, thereby completing the static electricity extraction work.
[0030] The carbon brush 5 can be replaced at any time after being worn.
[0031] The tail of the carbon brush 5 is provided with a carbon brush tail wire 7, and the carbon brush tail wire 7 is connected to the electrostatic grounding plate.
[0032] Example 2
[0033] (1) Select two fixed points on the outer wall of the compressor bearing box 1 and select the contact position of the carbon brush 5 on the compressor rotating shaft 2, and calculate the length of the axially adjustable bracket 3 to be 600 mm and the length of the radially adjustable bracket 4 to be 450 mm.
[0034] (2) Flat iron and steel bars are used to manufacture the axially adjustable bracket 3 and the radially adjustable bracket 4 according to the measured and calculated dimensions.
[0035] (3) Purchase a finished carbon brush 5 with a length of 50 mm, a width of 25 mm, and a height of 10 mm. According to the size of the carbon brush, process an elastic clamp 6 with a side length of 60 mm and an angle of 35°.
[0036] (4) Calculate the size of the contact adjustment bracket 8 and the size of the rectangular block 10 of the fixed fixture based on the size of the elastic clamp 6. The length is 30 mm, the width is 30 mm, and the height is 15 mm. The angle between the two rectangular blocks is 45°.
[0037] (5) Use two bolts to connect the axially adjustable bracket 3 and the radially adjustable bracket 4, and then use the bolts to install the axially adjustable bracket 3 on the centrifugal compressor bearing box 1. Do not tighten the bolts first. By moving the axially adjustable bracket 3 and the radially adjustable bracket 4, adjust the position of the bolts in the holes on the brackets so that the contact bracket 8 is in a suitable position, and then tighten the bolts.
[0038] (6) Install the elastic clamp 6 and the carbon brush 5 onto the contact adjustment bracket 8, and then install the contact adjustment bracket 8 onto the radially adjustable bracket 4. Adjust the contact adjustment bracket 8 to a suitable position by adjusting the end length of the radially adjustable bracket 4 to ensure that the carbon brush 5 is in full contact with the rotating shaft 2 of the centrifugal compressor.
[0039] (7) Use conductive wire to connect the brush tail wire 7 to the centrifugal compressor on-site static grounding plate to conduct high-voltage static electricity in the compressor. The brush tail wire 7 is reserved with a length of 100 mm to facilitate the forward movement of the carbon brush 5.
[0040] (8) As the carbon brush 5 wears, the elastic component 9 in the elastic clamp 6 can push the carbon brush forward to ensure that the carbon brush always maintains full contact with the rotating shaft of the centrifugal compressor.
Claims
1. An external carbon brush for a centrifugal compressor, characterized in that: It comprises an adjustable bracket assembly and a fixed carbon brush assembly; the adjustable bracket assembly comprises an axially adjustable bracket (3) and a radially adjustable bracket (4); the fixed carbon brush assembly comprises a carbon brush (5), an elastic clamp (6), a carbon brush tail wire (7), a contact adjustment bracket (8), and a rectangular block (10); an elastic component (9) is installed inside the elastic clamp (6); The carbon brush (5) is clamped by an elastic clamp (6) and connected to the outer end of the radially adjustable bracket (4) through a rectangular block (10) of the fixed clamp and a contact adjustment bracket (8); The axially adjustable bracket (3) and the radially adjustable bracket (4) fix the fixed carbon brush assembly to the compressor housing and are adjusted to a suitable position, so that the elastic clamp (6) automatically pushes the carbon brush (5) forward to ensure that the carbon brush (5) is in good contact with the rotating shaft (2) of the centrifugal compressor.
2. The external carbon brush for a centrifugal compressor according to claim 1, characterized in that: The axially adjustable bracket (3) is made of flat iron, and a rounded rectangular hole is opened on the flat iron, which is used to adjust the contact position between the carbon brush (5) and the compressor rotating shaft (2), and the axially adjustable bracket (3) is fixed to the outer shell of the compressor bearing box (1) using bolts.
3. The external carbon brush for a centrifugal compressor according to claim 1, characterized in that: The radially adjustable bracket (4) is made by welding flat iron and steel bars, and a rounded rectangular hole is formed at the front end of the flat iron, which is used to adjust the contact distance between the carbon brush (5) and the compressor rotating shaft (2), and to connect the radially adjustable bracket (4) and the axially adjustable bracket (3) with bolts, and the angle between the radially adjustable bracket (4) and the axially adjustable bracket (3) is a right angle.
4. The external carbon brush for a centrifugal compressor according to claim 1, characterized in that: The contact adjustment bracket (8) is made of 304 stainless steel and connected to the radially adjustable bracket (4) by bolts, and is used to fine-tune the contact position between the carbon brush (5) and the compressor rotating shaft (2). At the same time, the elastic clamp (6) and the carbon brush (5) are inserted into the groove of the rectangular block (10) of the contact adjustment bracket (8) and fixed, so that after the carbon brush is worn, the contact adjustment bracket (8) will not directly contact the centrifugal compressor rotating shaft (2), thereby avoiding damage to the compressor rotating shaft (2).
5. The external carbon brush for a centrifugal compressor according to claim 1, characterized in that: The carbon brush (5) is inserted into the elastic clamp (6), and when the carbon brush (5) is worn, the elastic clamp (6) automatically pushes the carbon brush (5) forward, thereby ensuring that the carbon brush (5) always maintains good contact with the compressor rotating shaft (2), thereby completing the static electricity extraction work.
6. The external carbon brush for a centrifugal compressor according to claim 1, characterized in that: The carbon brush (5) can be replaced at any time after being worn.
7. The external carbon brush for a centrifugal compressor according to claim 1, characterized in that: The carbon brush (5) has a carbon brush tail wire (7) at its tail, and the carbon brush tail wire (7) is connected to the electrostatic grounding plate.