CN116086763A - Large continuous wind tunnel axial flow compressor bearing overhauling method and overhauling device - Google Patents
Large continuous wind tunnel axial flow compressor bearing overhauling method and overhauling device Download PDFInfo
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- CN116086763A CN116086763A CN202310266861.3A CN202310266861A CN116086763A CN 116086763 A CN116086763 A CN 116086763A CN 202310266861 A CN202310266861 A CN 202310266861A CN 116086763 A CN116086763 A CN 116086763A
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- bearing
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- overhauling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/06—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby of trestle type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A method and a device for overhauling a bearing of a large continuous wind tunnel axial flow compressor belong to the field of wind tunnel construction. The invention solves the problems that when the bearing of the existing large-scale continuous wind tunnel axial flow compressor is overhauled, the disassembly and assembly workload is large, the disassembly and assembly period is long, the rotor moving blades are easy to damage, and the overhauling work is not easy to be smoothly carried out. The invention firstly removes the upper half shells of the air inlet shell and the air outlet shell, then removes the upper cover of the bearing box and the upper half part of the bearing in sequence, lifts the rotor upwards by 0.5mm through the axle supporting tool and the jack, and then pulls out the bearing bush of the lower half part of the bearing through the chain block for overhauling. The method and the device for overhauling the bearing of the large continuous wind tunnel axial compressor avoid the risk of damaging the blades in the process of hoisting the rotor, have better protection effect on the rotor, and reduce the workload, the disassembly difficulty and the disassembly period of the disassembly and assembly axial compressor.
Description
Technical Field
The invention belongs to the field of wind tunnel construction, and particularly relates to a method and a device for overhauling a bearing of a large continuous wind tunnel axial flow compressor.
Background
Wind tunnel tests are widely adopted as aerodynamic research methods, and necessary guarantees are provided for development in the fields of aviation, aerospace, railway transportation and the like. In a continuous transonic wind tunnel, an axial compressor is used for driving air flow in a wind tunnel loop to provide an operating pressure ratio required for establishing a wind tunnel flow field, and belongs to important equipment of the continuous wind tunnel.
The bearing component of the continuous wind tunnel axial flow compressor is arranged in the wind tunnel flow channel, is mostly a sliding bearing divided up and down and is used for supporting a compressor rotor and bearing the axial force of the compressor unit during operation; when the bearing assembly is overhauled, the upper half bearing can be directly dismantled, and when the lower half bearing is overhauled by bearing the weight of the rotor, the rotor of the axial flow compressor is usually required to be lifted out for overhauling.
The rotor of the large-scale continuous wind tunnel axial flow compressor has the advantages of large weight, large rotor diameter and sealing assembly arranged on the rotor, and the conventional method of bearing overhaul after the rotor of the axial flow compressor is lifted out is adopted, so that the disassembly and assembly workload is large, the disassembly and assembly overhaul period is long, the rotor moving blades are easy to damage, and the smooth operation of overhaul work is not facilitated.
Therefore, the application provides a method and a device for overhauling a bearing of a large continuous wind tunnel axial flow compressor, and the overhauling work of the bearing is completed on the premise that a compressor rotor does not need to be lifted out.
Disclosure of Invention
The invention aims to solve the problems that when the bearing of the existing large-scale continuous wind tunnel axial flow compressor is overhauled, the workload of disassembly and assembly is large, the disassembly and overhaul period is long, rotor moving blades are easy to damage, and the overhauling work is not easy to smoothly carry out. The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the invention is as follows:
scheme one: a method for overhauling a bearing of a large continuous wind tunnel axial flow compressor comprises the following steps:
step one: respectively dismantling the upper half shells of the air inlet shell and the air outlet shell, and dismantling the upper cover of the bearing box and the upper half part of the bearing in sequence;
step two: placing the shaft supporting tool at the bottom of the rotor, respectively installing two screw rods at two ends of the shaft supporting tool, placing a jack on a lower cover of a bearing box, horizontally placing a transverse plate at an execution end of the jack through the two screw rods, screwing a nut into each screw rod, and screwing the nut to fix the transverse plate;
step three: the height of the jack is adjusted to enable the jack to lift the rotor by 0.5mm and maintain the height;
step four: the fixed bracket is arranged on the central shell, the chain block is arranged on the fixed bracket, the other end of the chain block is sequentially connected with the hanging strip and the hanging ring, and then the hanging ring is fixed on a threaded hole in the lower half part of the bearing;
step five: tensioning the lower end of the chain block, driving the hanging strip, the hanging ring and the lower half part of the bearing to enable the lower half part of the bearing to rotate around the journal of the rotor until the bearing bush is unscrewed from the lower cover of the bearing box, and overhauling the bearing bush of the bearing;
step six: after the maintenance is finished, the height of the jack is adjusted, so that the jack lowers the rotor by 0.5mm, then the upper half part of the bearing is combined with the lower half part of the bearing, the upper cover of the bearing box is combined with the lower cover of the bearing box, and finally the upper half shells of the air inlet shell and the air outlet shell are installed, so that the maintenance work of the bearing is completed.
Further, in the second step, a copper sheet is arranged on the inner side wall of the shaft supporting tool, and when the shaft supporting tool is placed at the bottom of the rotor, a layer of copper sheet protection is arranged between the inner side wall of the shaft supporting tool and the shaft neck of the rotor.
Scheme II: according to the overhauling device of the overhauling method for the bearing of the large continuous wind tunnel axial compressor, the overhauling device comprises a shaft supporting tool, the shaft supporting tool supports a rotor, screws are symmetrically arranged at two ends of the shaft supporting tool, two jacks are symmetrically arranged at two ends of a lower cover of a bearing box, a transverse plate is arranged on the jacks, the screws penetrate through the transverse plate to be arranged, nuts are arranged on the screws, and the bottoms of the nuts are in contact with the end faces of the transverse plate.
Further, a fixed support is arranged on the central casing, a chain block is arranged on the fixed support, the other end of the chain block is sequentially connected with a hanging strip and a hanging ring, and the hanging ring is in threaded connection with the lower half part of the bearing.
Further, the jack is a mechanical self-locking jack.
The invention has the following beneficial effects:
according to the method for overhauling the bearing of the large-scale continuous wind tunnel axial flow compressor, in the overhauling process of the bearing bush of the large-scale continuous wind tunnel axial flow compressor, devices such as a rotor and a rotor-related lubricating oil seal are not required to be removed, the risk of damage to blades in the hoisting process of the rotor is avoided, a good protection effect is achieved on the rotor, and the service life of the rotor is prolonged.
According to the method for overhauling the bearing of the large continuous wind tunnel axial flow compressor, provided by the invention, the disassembly and assembly workload, the disassembly and assembly difficulty and the disassembly and assembly overhauling period are reduced, and in the overhauling process, the weight of the rotor is borne by the mechanical self-locking jack, so that the rotor is effectively prevented from suddenly falling down and being damaged due to failure of the jack.
Drawings
FIG. 1 is a schematic view of the overall structure of an axial flow compressor;
FIG. 2 is a schematic illustration of an axial flow compressor with an upper half of the intake housing removed;
FIG. 3 is a top view of FIG. 2 with the bearing housing upper cover removed;
FIG. 4 is a top view of the upper half of the bearing of FIG. 3 with the bearing removed;
FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;
fig. 6 is a schematic diagram of the use of a chain block to hoist the lower half of the bearing.
In the figure: the device comprises a 1-air inlet machine shell, a 2-central machine shell, a 3-rotor, a 4-air outlet machine shell, a 5-hole body, a 6-bearing box upper cover, a 7-bearing box lower cover, an 8-bearing upper half part, a 9-bearing lower half part, a 10-jack, an 11-shaft supporting tool, a 12-screw rod, a 13-transverse plate, a 14-nut, a 15-chain, a 16-fixed support, a 17-hanging strip and an 18-hanging ring.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The connection mentioned in the present invention is divided into a fixed connection and a detachable connection, wherein the fixed connection (i.e. the non-detachable connection) includes, but is not limited to, a conventional fixed connection manner such as a hemmed connection, a rivet connection, an adhesive connection, a welded connection, etc., and the detachable connection includes, but is not limited to, a conventional detachable manner such as a threaded connection, a snap connection, a pin connection, a hinge connection, etc., and when the specific connection manner is not specifically limited, at least one connection manner can be found in the existing connection manner by default, so that the function can be realized, and a person skilled in the art can select the connection according to needs. For example: the fixed connection is welded connection, and the detachable connection is hinged connection.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
When the axial compressor bearing is overhauled, the method specifically comprises the following steps of:
step one: the upper half shells of the air inlet shell 1 and the air outlet shell 4 are respectively dismantled, and the bearing box upper cover 6 and the bearing upper half part 8 in the air inlet shell 1 and the air outlet shell 4 are sequentially dismantled;
step two: placing the shaft supporting tool 11 at the bottom of the rotor 3, respectively installing two screw rods 12 at two ends of the shaft supporting tool 11, placing the jack 10 on the lower cover 7 of the bearing box, horizontally placing the transverse plate 13 at the execution end of the jack 10 through the two screw rods 12, screwing a nut 14 into each screw rod 12, and screwing the nut 14 to fix the transverse plate 13;
step three: adjusting the height of the jack 10 so that the jack 10 lifts the rotor 3 by 0.5mm and maintains the height;
step four: the fixed bracket 16 is arranged on the central shell 2 through screws, the chain block 15 is arranged on the fixed bracket 16, the other end of the chain block 15 is sequentially connected with the hanging strip 17 and the hanging ring 18, and then the hanging ring 18 is fixed on a threaded hole of the lower half part 9 of the bearing;
step five: the lower end of the chain 15 is pulled tightly to drive the hanging strip 17, the hanging ring 18 and the lower half part 9 of the bearing, so that the lower half part 9 of the bearing rotates around the journal of the rotor 3 until the bearing bush is screwed out of the lower cover 7 of the bearing box, and the bearing bush of the bearing is overhauled;
step six: after the maintenance is finished, the height of the jack 10 is adjusted, so that the jack 10 lowers the rotor 3 by 0.5mm, then the upper half 8 of the bearing is combined with the lower half 9 of the bearing, the upper cover 6 of the bearing box is combined with the lower cover 7 of the bearing box, and finally the upper half shells of the air inlet shell 1 and the air outlet shell 4 are installed, so that the maintenance work of the bearing is completed.
In order to avoid damage to the rotor when the shaft supporting tool 11 supports the rotor 3, a layer of copper sheet is arranged on the inner wall of the shaft supporting tool 11, and when the shaft supporting tool 11 is used for lifting the rotor 3 upwards, the rotor 3 cannot be damaged under the protection of the copper sheet.
An embodiment 2, referring to fig. 1-6, illustrates a large continuous wind tunnel axial flow compressor bearing maintenance device in this embodiment, including a supporting shaft tooling 11, where the supporting shaft tooling 11 is a U-shaped tooling, the rotor 3 is towed by the supporting shaft tooling 11, threaded holes are machined at two ends of the supporting shaft tooling 11, two screws 12 are in threaded connection with the supporting shaft tooling 11 through the threaded holes, a jack 10 is installed at two ends of a bearing box lower cover 7, a diaphragm 13 passes through the two screws 12 and is arranged on the jack 10, a nut 14 is connected to each screw 12, the nut 14 is arranged above the diaphragm 13, the bottom of the nut 14 contacts with the upper end surface of the diaphragm 13, and the rotor 3 is lifted upwards by a certain distance under the action of the jack 10 and the supporting shaft tooling 11, so that the rotor 3 is separated from the lower half 9 of the bearing;
a fixed support 16 is arranged on the central casing 2 through a screw, a chain block 15 is arranged on the fixed support 16, the other end of the chain block 15 is sequentially connected with a hanging belt 17 and a hanging ring 18, the hanging ring 18 is in threaded connection with the lower half 9 of the bearing, and under the action of the chain block 15, the bearing bush on the lower half 9 of the bearing is taken out through the hanging ring 18;
further, in order to improve stability of the jack 10, the jack 10 adopts a mechanical self-locking jack to bear weight of the rotor 3, so that the rotor 3 is prevented from suddenly falling down and damaging the rotor 3 due to failure of the jack 10.
The present embodiment is only illustrative of the present invention and does not limit the scope thereof, and those skilled in the art may make modifications to the part thereof without departing from the spirit of the invention.
Claims (5)
1. The method for overhauling the bearing of the large continuous wind tunnel axial flow compressor is characterized by comprising the following steps of:
step one: respectively dismantling the upper half shells of the air inlet shell (1) and the air outlet shell (4), and dismantling the upper cover (6) of the bearing box and the upper half part (8) of the bearing in sequence;
step two: placing a shaft supporting tool (11) at the bottom of a rotor (3), respectively installing two screws (12) at two ends of the shaft supporting tool (11), placing a jack (10) on a lower cover (7) of a bearing box, horizontally placing a transverse plate (13) at the execution end of the jack (10) through the two screws (12), screwing a nut (14) on each screw (12), and screwing the nut (14) to fix the transverse plate (13);
step three: adjusting the height of the jack (10) to enable the jack (10) to raise the rotor (3) by 0.5mm and maintain the height;
step four: the fixed support (16) is arranged on the central casing (2), the chain block (15) is arranged on the fixed support (16), the other end of the chain block (15) is sequentially connected with the hanging belt (17) and the hanging ring (18), and then the hanging ring (18) is fixed on a threaded hole of the lower half part (9) of the bearing;
step five: the lower end of the chain block (15) is pulled tightly to drive the hanging strip (17), the hanging ring (18) and the lower half part (9) of the bearing, so that the lower half part (9) of the bearing rotates around the shaft neck of the rotor (3) until the bearing bush is screwed out of the lower cover (7) of the bearing box, and the bearing bush of the bearing is overhauled;
step six: after the maintenance is finished, the height of the jack (10) is adjusted, so that the jack (10) lowers the rotor (3) by 0.5mm, then the upper half part (8) of the bearing is combined with the lower half part (9) of the bearing, the upper cover (6) of the bearing box is combined with the lower cover (7) of the bearing box, and finally the upper half shells of the air inlet shell (1) and the air outlet shell (4) are installed to finish the maintenance work of the bearing.
2. The method for overhauling a bearing of a large continuous wind tunnel axial compressor according to claim 1, wherein the method comprises the following steps: in the second step, copper sheets are arranged on the inner side walls of the shaft supporting tool (11), and when the shaft supporting tool (11) is placed at the bottom of the rotor (3), a layer of copper sheet protection is arranged between the inner side walls of the shaft supporting tool (11) and the shaft neck of the rotor (3).
3. The utility model provides a large-scale continuous type wind tunnel axial compressor bearing overhauls device which characterized in that: the device is applied to the large-scale continuous wind tunnel axial compressor bearing overhauling method according to claim 1 or 2, the device comprises a shaft supporting tool (11), the shaft supporting tool (11) supports a rotor (3), screw rods (12) are symmetrically arranged at two ends of the shaft supporting tool (11), two jacks (10) are symmetrically arranged at two ends of a lower cover (7) of a bearing box, a transverse plate (13) is arranged on the jacks (10), the screw rods (12) penetrate through the transverse plate (13) to be arranged, nuts (14) are arranged on the screw rods (12), and the bottoms of the nuts (14) are in contact with the end faces of the transverse plate (13).
4. A large continuous tunnel axial compressor bearing service apparatus according to claim 3, wherein: the central casing (2) is provided with a fixed support (16), the fixed support (16) is provided with a chain block (15), the other end of the chain block (15) is sequentially connected with a hanging belt (17) and a hanging ring (18), and the hanging ring (18) is in threaded connection with the lower half part (9) of the bearing.
5. A large continuous tunnel axial compressor bearing service apparatus according to claim 3, wherein: the jack (10) is a mechanical self-locking jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310266861.3A CN116086763B (en) | 2023-03-20 | 2023-03-20 | Large continuous wind tunnel axial flow compressor bearing overhauling method and overhauling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310266861.3A CN116086763B (en) | 2023-03-20 | 2023-03-20 | Large continuous wind tunnel axial flow compressor bearing overhauling method and overhauling device |
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| CN116086763A true CN116086763A (en) | 2023-05-09 |
| CN116086763B CN116086763B (en) | 2023-06-06 |
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|---|---|
| CN116086763B (en) | 2023-06-06 |
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