CN111716306B - Bearing-rotor experiment table with automatic centering and locking functions - Google Patents
Bearing-rotor experiment table with automatic centering and locking functions Download PDFInfo
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- CN111716306B CN111716306B CN202010610399.0A CN202010610399A CN111716306B CN 111716306 B CN111716306 B CN 111716306B CN 202010610399 A CN202010610399 A CN 202010610399A CN 111716306 B CN111716306 B CN 111716306B
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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
- B25H1/10—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting holders for tool or work
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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
- G01M13/00—Testing of machine parts
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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
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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Abstract
The invention provides a bearing-rotor experiment table with automatic centering and locking functions, which comprises a bearing box, a self-aligning bearing, a base, a locking frame, a locking column and the like. The bearing box is internally provided with a fluid radial sliding bearing to be tested and embedded into a self-aligning bearing, and the self-aligning bearing is externally connected with a base. One end of the bearing box is connected with a locking frame, and the locking frame is provided with a lock cylinder hole and a bolt hole in the circumferential direction. The two ends of the experiment table are symmetrically supported by using the bearings to be tested, the two bearings to be tested are pressed by the shaft, the axis of the self-aligning bearing automatic adjusting shaft and the axes of the two bearings to be tested are enabled to be parallel to each other, the axes of the three bearings to be tested coincide, the lock cylinder penetrates into the lock cylinder hole of the locking frame and abuts against the base, and the relative positions of the two bearings to be tested are locked by the circumferential bolt holes. The experiment table has the functions of testing the static and dynamic characteristics of the fluid radial sliding bearing and the like, and has the advantages of novel structure, convenience in disassembly and assembly, simplicity in operation, high measurement precision and the like.
Description
Technical Field
The invention relates to a bearing-rotor experiment table with automatic centering and locking functions, and belongs to the field of rotating machinery.
Background
The bearing-rotor system has an important influence on the performance, reliability, etc. of the rotary machine, and is one of the core technologies of the rotary machine. The research method of the bearing-rotor system mainly comprises theoretical analysis, numerical simulation and experimental test. Among them, the experimental test method is the most accurate. In the publications and patents, there are a number of testing approaches for bearing-rotor systems. However, in tests of static characteristics (such as eccentricity-bearing capacity test), high-speed rotating shafting and the like of the fluid radial sliding bearing, various challenges such as shafting centering, load measurement, high-speed driving source and the like are faced. For example, in the document "Experimental Response of Simple Gas Hybrid Bearings for Oil-free turbomachery" (DOI: 10.1115/1.1839922), the bearing to be tested is used for supporting at both ends of the rotor, and the vertical height of the bearing is manually adjusted by bolts, so as to achieve the purpose of centering the shafting. However, the manual adjustment error is too large for micron-sized lubrication gaps. In order to solve the problems, the invention provides a bearing-rotor experiment table with automatic centering and locking functions, which has multiple functions of testing static and dynamic characteristics of a fluid radial sliding bearing, testing a pneumatic high-speed rotor and the like.
Disclosure of Invention
The invention aims to solve the problems and provide a bearing-rotor experiment table with automatic centering and locking functions.
The invention aims to realize the bearing-rotor experiment table with the functions of automatic centering and locking, which is characterized in that: the device comprises a bottom plate and an upper cover, wherein 3 lower brackets are arranged on the bottom plate, 1 lower bracket is positioned between the other 2 lower brackets, a Pelton turbine is fixed on the lower bracket positioned between the 2 lower brackets, and bases are fixed on the other 2 lower brackets;
each base is provided with a self-aligning bearing, a bearing box is embedded on the self-aligning bearing, and a fluid radial sliding bearing to be tested is arranged in the bearing box; one end of the bearing box is connected with a locking frame, and the other end of the bearing box is connected with a displacement measuring frame; the locking frame is provided with a lock cylinder hole, a lock cylinder penetrates through the lock cylinder hole and is fixed in the lock cylinder hole, and the lock cylinder penetrates through the lock cylinder hole of the locking frame and abuts against the base;
the displacement measurement frame is provided with a displacement sensor access hole and is connected with a displacement sensor, and the displacement sensor is inserted into the displacement sensor access hole;
the upper part of the base is connected with an upper bracket which is connected with an upper cover, and an S-shaped force sensor is arranged in the upper bracket; a film type force sensor is arranged between the lower bracket and the bottom plate;
the non-driving end of the shaft is provided with a non-contact speed sensor; the method for realizing the automatic centering and locking function by enabling the two ends of the shaft to penetrate through the fluid radial sliding bearing to be tested comprises the following steps: the shaft presses the two fluid radial sliding bearings to be tested, the self-aligning bearing can automatically adjust the angular deviation, and the self-aligning bearing automatically adjusts the axis of the shaft and the axes of the two fluid radial sliding bearings to be tested, so that the axes of the three are parallel to each other, and the axes of the two fluid radial sliding bearings to be tested are superposed; penetrating the lock cylinder into a lock cylinder hole of the locking frame, abutting against the base and fastening, thereby locking the relative position of the fluid radial sliding bearing to be tested;
the motor is also arranged, and a power output shaft of the motor is in transmission connection with the shaft; the Pelton turbine is connected in the middle of the shaft.
The bearing box is in interference connection with the self-aligning bearing, a bearing box lubricant supply hole is formed in the bearing box, a locking frame lubricant supply hole is formed in the locking frame, and the bearing box lubricant supply hole is aligned with the locking frame lubricant supply hole and connected to a lubricant supply pipe;
a lubricant channel is arranged in the bearing box and supplies lubricant for the fluid radial sliding bearing to be tested; the bearing box is provided with lug-shaped fins and circumferential lockholes, and the lock columns penetrate through the circumferential lockholes to prevent the bearing box from rotating;
the bearing box is provided with a displacement measurement hole and is aligned with a displacement sensor access hole on the displacement measurement frame;
the bearing box is provided with a positioning shoulder A and a positioning shoulder B.
The shaft may be loaded into a counterweight plate, on which a counterweight bolt is screwed, for adjusting the balanced and unbalanced loads of the fluid radial sliding bearing to be tested.
The upper bracket comprises a first upper bracket, an S-shaped force sensor and a second upper bracket, the first upper bracket, the S-shaped force sensor and the second upper bracket are fixedly connected together, and the S-shaped force sensor is positioned between the first upper bracket and the second upper bracket;
the first upper bracket is provided with an upper bracket bolt hole and an upper bracket tenon, and the upper cover is provided with an upper cover mortise and a plurality of upper cover bolt holes;
the first upper bracket is provided with a first fastening bolt, and the first fastening bolt is screwed on and screwed in an upper bracket bolt hole of the first upper bracket and an upper cover bolt hole of the upper cover, so that the first upper bracket is fixed on the upper cover, and the upper bracket is fixed on the upper cover;
the lower bracket is provided with a lower bracket bolt hole and a lower bracket tenon, and the bottom plate is provided with a bottom plate mortise and a plurality of bottom plate bolt holes;
the lower bracket tenon of the lower bracket is inserted into the bottom plate mortise of the bottom plate, the lower bracket can move along the bottom plate mortise of the bottom plate under the action of the lower bracket tenon, and the lower bracket is also provided with a second fastening bolt which is screwed and screwed in the lower bracket bolt hole of the lower bracket and the bottom plate bolt hole of the bottom plate, so that the lower bracket is fixed on the bottom plate;
a second upper bracket bolt hole is formed in the second upper bracket, and a base connecting bolt hole is formed in one end, facing the base, of the lower bracket; the base is provided with an upper base bolt hole and a lower base bolt hole; an upper base bolt hole of the base corresponds to a second upper support bolt hole of the second upper support, and first base fastening bolts are screwed in the upper base bolt hole and the second upper support bolt hole to fix the second upper support and the base, so that the upper support and the base are fixed; the lower base bolt hole of base corresponds with the base connecting bolt hole of lower carriage, and lower base bolt hole, base connecting bolt hole have revolved second base fastening bolt for lower carriage, base are fixed.
The self-aligning bearing is arranged in the base and is fastened by the fixing ring and the gland.
One end of the bearing box is connected with the locking frame through a bolt, and the other end of the bearing box is connected with the displacement measuring frame and is fastened by a fixing ring.
The locking frame is provided with a locking protrusion, the locking protrusion is provided with a lock cylinder hole and a circumferential bolt hole, a gap is formed in one side, facing the locking frame, of the hole wall of the lock cylinder hole, the circumferential bolt hole is formed in the locking protrusion on the two sides of the gap, the lock cylinder penetrates through the lock cylinder hole, bolts are screwed on the circumferential bolt holes in the locking protrusion on the two sides of the gap, the gap is reduced, the diameter of the lock cylinder hole is reduced, and the lock cylinder is clamped tightly so as to be fastened on the locking frame; the lock cylinder penetrates into a lock cylinder hole of the locking frame and abuts against the base, and the relative position of the fluid radial sliding bearing to be tested is locked by the circumferential bolt hole;
the gap of the locking frame is used for circumferentially fastening the lock column; the lock cylinder hole of the locking frame is in clearance fit with the lock cylinder.
The bearing-rotor experiment table with the automatic centering and locking functions comprises a bearing box, a self-aligning bearing, a base, a locking frame, a locking column, a lubricant supply pipe, a gland, a displacement measuring frame, a fixing ring, an upper support, a lower support, a shaft, a counterweight plate, a Pelton turbine, a motor, a displacement sensor, an S-shaped force sensor, a film type force sensor, a speed sensor, a bottom plate and an upper cover. The bearing box is internally provided with a fluid radial sliding bearing to be tested. The bearing box is embedded into the self-aligning bearing. The self-aligning bearing is arranged in the base and is fastened with the gland by the fixing ring. One end of the bearing box is connected with the locking frame through a bolt, and the other end of the bearing box is connected with the displacement measuring frame and fastened by the fixing ring. The locking frame is provided with a lock cylinder hole and is circumferentially provided with bolt holes, and the lock cylinder penetrates through the lock cylinder hole and is fastened through the circumferential bolt holes. The displacement measuring frame is provided with a displacement sensor access hole and is accessed to the displacement sensor. The base can be connected with the upper bracket, the upper bracket is connected with the upper cover, and the S-shaped force sensor is arranged in the upper bracket. The base can be connected with the lower support, the lower support is connected with the bottom plate, and the thin film type force sensor is arranged between the lower support and the bottom plate. The non-driving end of the shaft is provided with a non-contact speed sensor.
A bearing-rotor experiment table with automatic centering and locking functions is characterized in that two ends of the bearing-rotor experiment table are symmetrically supported by a fluid radial sliding bearing to be tested.
A bearing-rotor experiment table with automatic centering and locking functions is used for carrying out axial angle deviation adjustment on a bearing box provided with a fluid radial sliding bearing to be tested under the action of automatic angle deviation adjustment of a self-aligning bearing. The method for realizing the automatic centering and locking function comprises the following steps: two ends of the shaft penetrate through the fluid radial sliding bearing to be tested, and the shaft is used for pressing the two fluid radial sliding bearings to be tested. At the moment, the self-aligning bearing automatically adjusts the axis of the shaft and the axes of the two to-be-tested fluid radial sliding bearings, so that the axes of the three are parallel to each other, and the axes of the two to-be-tested fluid radial sliding bearings coincide. Then, a lock cylinder penetrates through a lock cylinder hole of the locking frame and abuts against the base, and the relative positions of the two fluid radial sliding bearings to be tested are locked by the circumferential bolt holes. It is worth emphasizing that circumferential bolt holes have to be used for locking. If locking is performed using bolts perpendicular to the base, shafting alignment will be broken. Based on this technique, the axes of the two fluid radial plain bearings to be tested coincide at all times during the experiment.
A bearing-rotor experiment table with automatic centering and locking functions has two driving modes: a motor drive is used at one end and the Pelton turbine drive is used in the middle. A bearing-rotor experiment table with automatic centering and locking functions has two test forms: suspended and base type. The suspension type is only connected with the upper support and is not connected with the lower support, the base type is only connected with the lower support and is not connected with the upper support, and the upper support and the lower support are not allowed to be connected simultaneously. The suspended type is matched with the Pelton turbine drive in the middle, and static characteristics (including eccentricity rate-bearing capacity curve and the like) of a fluid radial sliding bearing, dynamic characteristics (including maximum rotating speed and the like which can be achieved by a bearing-rotor system) of a high-speed rotating shaft system and the like can be tested. The pedestal-type mating end motor drive can test the dynamic characteristics of the fluid radial sliding bearing (including the dynamic response of the bearing-rotor system under unbalanced load conditions). The base type is matched with the Pelton turbine in the middle for driving, and dynamic characteristics (including the maximum rotating speed and the like which can be achieved by a bearing-rotor system) of a high-speed rotating shaft system can be tested.
Further, the bearing box and the self-aligning bearing are in interference connection. The bearing box is provided with a lubricant supply hole, is aligned with the lubricant supply hole in the locking frame and is connected with a lubricant supply pipe. And a lubricant channel is arranged in the bearing box and used for supplying lubricant to the fluid radial sliding bearing to be tested. The bearing box is equipped with ear type fin and circumference lockhole, the lock post passes the circumference lockhole, prevents the bearing box rotates. The bearing box is provided with a displacement measurement hole which is aligned with a displacement sensor access hole on the displacement measurement frame. The bearing box is provided with the necessary positioning shoulder A and positioning shoulder B.
Furthermore, a gap is arranged at the hole part of the lock column of the locking frame and used for circumferentially fastening the lock column. The lock cylinder hole of the locking frame is in clearance fit with the lock cylinder.
Further, the shaft may be loaded into a weight plate on which weight bolts are screwed for adjusting the balanced load and the unbalanced load of the fluid radial sliding bearing to be tested.
Further, the upper support and the lower support are provided with bolt holes and tenons, and the upper cover and the bottom plate are provided with a plurality of bolt holes and mortises and used for adjusting the axial position of the fluid radial sliding bearing to be tested.
The invention has the following advantages: novel structure, easy dismounting, easy operation, measurement accuracy height.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic perspective view of a bearing cartridge according to the present invention;
FIG. 4 is a schematic perspective view of another embodiment of the bearing cartridge of the present invention;
FIG. 5 is another schematic structural view of the bearing cartridge of the present invention;
FIG. 6 is a schematic cross-sectional view of the bearing cartridge of the present invention;
FIG. 7 is a schematic view of a bearing cartridge with a fluid radial sliding bearing according to the present invention;
FIG. 8 is a schematic cross-sectional view of a bearing cartridge with a fluid radial sliding bearing according to the present invention;
FIG. 9 is a schematic view of a self-aligning bearing structure according to the present invention;
FIG. 10 is a schematic cross-sectional view of a self-aligning bearing according to the present invention;
FIG. 11 is a schematic view of a base structure according to the present invention;
FIG. 12 is a schematic view of another embodiment of the base of the present invention;
FIG. 13 is a schematic cross-sectional view of a base of the present invention;
FIG. 14 is a schematic view of the locking frame of the present invention;
FIG. 15 is a cross-sectional schematic view of the locking bracket of the present invention;
FIG. 16 is a structural view of the locking bracket of the present invention in another orientation;
FIG. 17 is a schematic view of a positioning frame according to the present invention;
FIG. 18 is a schematic cross-sectional view of a positioning frame according to the present invention;
FIG. 19 is a schematic view of a fixed ring structure of the present invention;
FIG. 20 is another view of the retaining ring of the present invention;
FIG. 21 is a schematic view of a first upper bracket of the present invention;
FIG. 22 is a cross-sectional view of a first of the upper brackets of the present invention;
FIG. 23 is a schematic view of a second upper bracket of the present invention;
FIG. 24 is a cross-sectional view of a second one of the upper brackets of the present invention;
FIG. 25 is a schematic view of the lower bracket structure of the present invention;
FIG. 26 is a cross-sectional view of the lower bracket of the present invention;
FIG. 27 is a schematic view of the bottom plate structure of the present invention;
FIG. 28 is a schematic cross-sectional view of the base plate of the present invention;
FIG. 29 is a schematic view of the structure of the upper cover of the present invention;
FIG. 30 is a schematic cross-sectional view of the upper cover of the present invention;
FIG. 31 is a schematic view of the shaft and weight plate configuration of the present invention;
fig. 32 is a schematic view of the weight plate configuration of the present invention;
FIG. 33 is a schematic view of a Pelton turbine configuration of the present invention;
FIG. 34 is a schematic cross-sectional view of a Pelton turbine of the present invention;
in the figure: 1 bearing box, 1-1 bearing box lubricant supply hole, 1-2 lubricant channel, 1-3 ear type fin, 1-4 circumferential lockhole, 1-5 displacement measuring hole, 1-6 positioning shoulder A, 1-7 positioning shoulder B, 2 self-aligning bearing, 2-1 self-aligning bearing inner ring, 2-2 self-aligning bearing outer ring, 3 base, 3-1 upper base bolt hole, 3-2 lower base bolt hole, 3-3 positioning shoulder C, 4 locking frame, 4-1 lock column hole, 4-2 circumferential bolt hole, 4-3 locking frame lubricant supply hole, 4-4 gap, 5 lock column, 6 lubricant supply pipe, 7 gland, 8 displacement measuring frame, 8-1 displacement sensor access hole, 9 fixing ring, 10 upper support, 10-1 first upper support, 10-1-1 upper support bolt hole, 10-1-2 upper support tenon, 10-2 second upper support, 10-2-1 second upper support bolt hole, 11 lower support, 11-1 lower support bolt hole, 11-2 lower support tenon, 11-3 base connecting bolt hole, 12 shaft, 12-1 balance weight disc, 12-2 balance weight bolt, 12-3 balance weight bolt hole, 13Pelton turbine, 14 motor, 15 displacement sensor, 16S type force sensor, 17 film type force sensor, 18 speed sensor, 19 bottom plate, 19-1 bottom plate mortise, 19-2 bottom plate bolt hole, 20 upper cover, 20-1 upper cover mortise, 20-2 upper cover bolt hole and 21 fluid radial sliding bearing.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
A bearing-rotor experiment table with automatic centering and locking functions comprises a bottom plate 19 and an upper cover 20, wherein 3 lower supports 11 are arranged on the bottom plate 19, 1 lower support 11 is located between the other 2 lower supports 11, a Pelton turbine 13 is fixed on the lower support 11 located between the 2 lower supports 11, and a base 3 is fixed on the other 2 lower supports 11.
Each base 3 is provided with a self-aligning bearing 2, the self-aligning bearing comprises a self-aligning bearing inner ring 2-1 and a self-aligning bearing outer ring 2-2, and the self-aligning bearing inner ring 2-1 is arranged in the self-aligning bearing outer ring 2-2; a bearing box 1 is embedded in the self-aligning bearing 2, the bearing box 1 is connected with an inner ring 2-1 of the self-aligning bearing, and a fluid radial sliding bearing to be tested is arranged in the bearing box 1; one end of the bearing box 1 is connected with a locking frame 4, and the other end is connected with a displacement measuring frame 8; a lock cylinder hole 4-1 is formed in the locking frame 4, a lock cylinder 5 penetrates through the lock cylinder hole 4-1, the lock cylinder 5 is fixed in the lock cylinder hole 4-1, and the lock cylinder 5 penetrates through the lock cylinder hole 4-1 of the locking frame 4 and abuts against the base 3; the displacement measurement frame 8 is provided with a displacement sensor access hole 8-1 and is connected to a displacement sensor 15, and the displacement sensor 15 is inserted into the displacement sensor access hole 8-1; the upper part of the base 3 is connected with an upper bracket 10, the upper bracket 10 is connected with an upper cover 20, and an S-shaped force sensor 16 is arranged in the upper bracket 10; a film type force sensor 17 is arranged between the bracket 11 and the bottom plate 19; a shaft 12 is further arranged, and a non-drive end of the shaft 12 is provided with a non-contact speed sensor 18; two ends of the shaft 12 penetrate through the fluid radial sliding bearings 21 to be tested, the shaft 12 presses the two fluid radial sliding bearings to be tested, the self-aligning bearing 2 can automatically adjust the angular deviation, and the self-aligning bearing 2 automatically adjusts the axial line of the shaft 12 and the axial lines of the two fluid radial sliding bearings to be tested, so that the axial lines of the three are parallel to each other, and the axial lines of the two fluid radial sliding bearings to be tested are superposed; the lock cylinder 5 is inserted into the lock cylinder hole 4-1 of the locking frame 4, is propped against the base 3 and is fastened, so that the relative position of the fluid radial sliding bearing to be tested is locked; a motor 14 is also arranged, and a power output shaft of the motor 14 is in transmission connection with the shaft 12; the Pelton turbine 13 is mounted in the middle of the shaft 12.
Furthermore, the bearing box 1 is in interference connection with the self-aligning bearing 2, a bearing box lubricant supply hole 1-1 is formed in the bearing box 1, a locking frame lubricant supply hole 4-3 is formed in the locking frame 4, the bearing box lubricant supply hole 1-1 is aligned with the locking frame lubricant supply hole 4-3, and a lubricant supply pipe 6 is connected into the bearing box lubricant supply hole 1-1; a lubricant channel 1-2 is arranged in the bearing box 1 and used for supplying lubricant for the fluid radial sliding bearing to be tested; the bearing box 1 is provided with lug-shaped fins 1-3 and circumferential lockholes 1-4, and the lock column 5 penetrates through the circumferential lockholes 1-4 to prevent the bearing box 1 from rotating; the bearing box 1 is provided with displacement measuring holes 1-5 which are aligned with displacement sensor access holes 8-1 on the displacement measuring frame 8; a positioning shoulder A1-6 and a positioning shoulder B1-7 are provided on the bearing cartridge 1.
The shaft 12 can be installed into a balance weight disc 12-1, a balance weight bolt hole 12-3 is formed in the balance weight disc 12-1, and a balance weight bolt 12-2 is screwed in the balance weight bolt hole 12-3 of the balance weight disc 12-1 and used for adjusting the balanced load and the unbalanced load of the fluid radial sliding bearing to be tested.
The upper bracket 10 comprises a first upper bracket 10-1, an S-shaped force sensor 16 and a second upper bracket 10-2, the first upper bracket 10-1, the S-shaped force sensor 16 and the second upper bracket 10-2 are fixedly connected together, and the S-shaped force sensor 16 is positioned between the first upper bracket 10-1 and the second upper bracket 10-2;
an upper bracket bolt hole 10-1-1 and an upper bracket tenon 10-1-2 are arranged on the first upper bracket 10-1, and an upper cover mortise 20-1 and a plurality of upper cover bolt holes 20-2 are arranged on the upper cover 20; an upper bracket tenon 10-1-2 of a first upper bracket 10-1 is inserted into an upper cover mortise 20-1 of an upper cover 20, the first upper bracket 10-1 can move along the upper cover mortise 20-1 of the upper cover 20 under the action of the upper bracket tenon 10-1-2, and a first fastening bolt is also arranged and screwed on the upper bracket bolt hole 10-1-1 of the first upper bracket 10-1 and an upper cover bolt hole 20-2 of the upper cover 20, so that the first upper bracket 10-1 is fixed on the upper cover 20, and the upper bracket 10 is fixed on the upper cover 20;
the lower support 11 is provided with a lower support bolt hole 11-1 and a lower support tenon 11-2, and the bottom plate 19 is provided with a bottom plate mortise 19-1 and a plurality of bottom plate bolt holes 19-2; a lower bracket tenon 11-2 of the lower bracket 11 is inserted into a bottom plate mortise 19-1 of the bottom plate 19, the lower bracket 11 can move along the bottom plate mortise 19-1 of the bottom plate 19 under the action of the lower bracket tenon 11-2, and a second fastening bolt is also arranged and screwed in a lower bracket bolt hole 11-1 of the lower bracket 11 and a bottom plate bolt hole 19-2 of the bottom plate 19, so that the lower bracket 11 is fixed on the bottom plate 19;
a second upper bracket bolt hole 10-2-1 is formed in the second upper bracket 10-2, and a base connecting bolt hole 11-3 is formed in one end, facing the base 3, of the lower bracket 11; an upper base bolt hole 3-1 and a lower base bolt hole 3-2 are arranged on the base 3; an upper base bolt hole 3-1 of the base 3 corresponds to a second upper support bolt hole 10-2-1 of a second upper support 10-2, and a first base fastening bolt is screwed in the upper base bolt hole 3-1 and the second upper support bolt hole 10-2-1, so that the second upper support 10-2 and the base 3 are fixed, and the upper support 10 and the base 3 are fixed; the lower base bolt hole 3-2 of the base 3 corresponds to the base connecting bolt hole 11-3 of the lower support 11, and the second base fastening bolt is screwed in the lower base bolt hole 3-2 and the base connecting bolt hole 11-3, so that the lower support 11 and the base 3 are fixed.
The self-aligning bearing 2 is fitted into the base 3 and fastened with the fixing ring 9 and the gland 7. One end of the bearing box 1 is connected with the locking frame 4 through a bolt, and the other end is connected with the displacement measuring frame 8 and is fastened by a fixing ring 9.
A locking protrusion is arranged on the locking frame 4, a locking column hole 4-1 and a circumferential bolt hole 4-2 are arranged on the locking protrusion, a gap 4-4 is formed in one side, facing the locking frame 4, of the wall of the locking column hole 4-1, the circumferential bolt hole 4-2 is arranged on the locking protrusion on two sides of the gap 4-4, the locking column 5 penetrates through the locking column hole 4-1, a bolt is screwed on the circumferential bolt hole 4-2 on the locking protrusion on two sides of the gap 4-4, so that the gap 4-4 is reduced, the diameter of the locking column hole 4-1 is reduced, and the locking column 5 is clamped, and the locking column 5 is fastened on the locking frame 4; the lock column 5 penetrates into a lock column hole 4-1 of the locking frame 4 and abuts against the base 3, and the relative position of the fluid radial sliding bearing to be tested is locked by the circumferential bolt hole 4-2; the gap 4-4 of the locking frame 4 is used for fastening the lock column 5 in the circumferential direction; the lock cylinder hole 4-1 of the locking frame 4 is in clearance fit with the lock cylinder 5.
Taking the static and dynamic characteristics of a porous aerostatic radial bearing as an example, the porous aerostatic radial bearing is a type of fluid radial sliding bearing, and the bearing adopts a bushing which is processed in a porous way, and gas is supplied to the outer surface of the bushing (the gas is pressurized) to achieve the purpose of static pressure lubrication. In order to test the static and dynamic characteristics of the bearing, a bearing-rotor experiment table with automatic centering and locking functions shown in fig. 1 is designed, and comprises a bearing box 1, a self-aligning bearing 2, a base 3, a locking frame 4, a locking column 5, a lubricant supply pipe 6, a gland 7, a displacement measuring frame 8, a fixing ring 9, an upper frame 10, a lower frame 11, a shaft 12, a Pelton turbine 13, a motor 14, a displacement sensor 15, an S-shaped force sensor 16, a thin film type force sensor 17, a speed sensor 18, a bottom plate 19 and an upper cover 20.
The bearing cartridge 1 shown in fig. 3, 4, 5 and 6 was designed according to the porous aerostatic radial bearing to be tested. The bearing box 1 is provided with 4 bearing box lubricant supply holes 1-1 and is connected with a lubricant supply pipe, and a lubricant channel 1-2 is arranged inside the bearing box for supplying lubricant for the fluid radial sliding bearing. The bearing box 1 is provided with 2 ear-shaped fins 1-3 and is provided with circumferential lock holes 1-4, and the lock column 5 can pass through the circumferential lock holes 1-4, so that the bearing box 1 is prevented from rotating. The bearing box 1 is provided with 4 displacement measuring holes which are aligned with the displacement sensor access holes 8-1 on the displacement measuring frame 8. The bearing box 1 is provided with a positioning shoulder A1-6 connected with the self-aligning bearing 2 and the displacement measuring frame 8. The fluid radial sliding bearing is incorporated into the bearing housing 1, and the inner surface of the bearing housing 1 is in close contact with the outer surface of the porous aerostatic radial bearing, as shown in fig. 7 and 8. A suitable self-aligning bearing 2 is selected as shown in fig. 9 and 10. The bearing box 1 is embedded into the self-aligning bearing 2, and the two are in interference connection. The base 3 is designed to match the self-aligning bearing 2 as shown in fig. 11, 12 and 13. The base 3 is provided with bolt holes connected with the upper bracket 10, the lower bracket 11 and the gland 7. The self-aligning bearing 2 is arranged in the base 3, the inner ring of the self-aligning bearing 2 and the bearing box 1 are fastened by the fixing ring 9, the inner surface of the fixing ring 9 and the corresponding part of the bearing box 1 are provided with threads, and the outer ring of the self-aligning bearing 2 and the base 3 are fastened by the gland 7. The fixing ring 9 is shown in fig. 19 and 20. The locking bracket 4 is designed as shown in fig. 14, 15 and 16. The locking frame 4 is connected with one end of the bearing box 1 and compresses the porous aerostatic radial bearing to perform sealing treatment at necessary positions. The locking frame 4 is provided with 4 cylinder holes, 4 circumferential bolt holes, 4 radial lubricant feed holes. The locking frame lubricant supply hole 4-3 of the locking frame 4 is aligned with the bearing cartridge lubricant supply hole 1-1 of the bearing cartridge 1, and the lubricant supply pipe 6 passes through the locking frame lubricant supply hole of the locking frame 4. The hole part of the lock column of the locking frame 4 is provided with a gap for fastening the lock column 5 in the circumferential direction. The lock cylinder hole of the locking frame 4 is in clearance fit with the lock cylinder 5. The displacement frame 8 is designed as shown in fig. 17 and 18. The displacement measuring frame 8 is connected with the other end of the bearing box 1, the displacement measuring frame 8 and the bearing box 1 are fastened by a fixing ring 9, and the inner surface of the fixing ring 9 and the corresponding part of the bearing box 1 are provided with threads. The upper bracket 10 and the lower bracket 11 are designed, as shown in fig. 21, 22, 23, 24 and 25, 26, both provided with bolt holes and rabbets. The bottom plate 19 and the upper cover 20 are designed, as shown in fig. 27, 28, 29, 30, both of which are provided with a plurality of bolt holes and mortises. The axial position of the porous aerostatic radial bearing (fluid radial sliding bearing) is adjusted by means of the mortises and tenons. In order to experimentally investigate the static and dynamic characteristics of the porous aerostatic radial bearing, the weight plate 12-1 was designed according to the parameters of the shaft 12, as shown in fig. 31 and 32. And counterweight bolt holes 12-3 which are uniformly distributed are formed in the circumferential direction of the counterweight plate, and the balance load and the unbalance load are adjusted by adding counterweight bolts 12-2.
In the static characteristic test of the porous aerostatic radial bearing, both ends were symmetrically supported by the same porous aerostatic radial bearing, and the Pelton turbine 13 was used to drive the shaft 12 in the middle. A Pelton turbine with a hoof-shaped groove is designed according to the driving force requirement of the shaft 12, and as shown in fig. 33 and 34, high-pressure gas is tangentially supplied to the Pelton turbine to drive the shaft 12 to rotate. The suspension type is adopted, only the upper bracket 10 is connected, and the lower bracket 11 is not connected. An S-shaped force sensor 16 is mounted in the upper bracket 10, a speed sensor 18 is mounted at the end of the shaft 12, and a displacement sensor 15 is mounted in the displacement-measuring bracket 8. After the parts are assembled, the automatic centering and locking functions are implemented: both ends of the shaft 12 penetrate the porous aerostatic radial bearings, and the shaft 12 presses the two porous aerostatic radial bearings. The self-aligning bearing automatically adjusts the axis of the shaft 12 and the axes of the two porous aerostatic radial bearings, so that the axes of the three are parallel to each other and the axes of the two porous aerostatic radial bearings are overlapped. The lock cylinder 5 is inserted into the lock cylinder hole of the lock frame 4 and pressed against the base 3, and the relative positions of the two porous aerostatic radial bearings are locked by the circumferential bolt holes. After the shafting is centered and locked, bolts are increased and decreased on the balance weight disc, the shaft 12 is kept in a balanced load state, and static characteristic experiments of the porous aerostatic radial bearing are carried out.
In the dynamic characteristic test of the porous aerostatic radial bearing, both ends were symmetrically supported by the same porous aerostatic radial bearing, and one end of the shaft 12 was driven by the motor 14. The base type is adopted, only the lower bracket 11 is connected, and the upper bracket 10 is not connected. A film type force sensor 17 is installed between the lower bracket 11 and the bottom plate 19, a speed sensor 18 is installed at the end of the shaft 12, and a displacement sensor 15 is installed in the displacement-measuring bracket 8. After the parts are assembled, the centering and locking operations are repeated as in the static characteristic test. After the shafting is centered and locked, bolts are increased and decreased on the balance weight disc, the shaft 12 is kept in an unbalanced load state, and dynamic characteristic experiments of the porous aerostatic radial bearing are carried out.
The bearing-rotor experiment table with the automatic centering and locking functions has the advantages of novel structure, convenience in disassembly and assembly, simplicity in operation, high measurement precision and the like. The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. The utility model provides a take bearing-rotor laboratory bench of automatic centering and locking function which characterized by: the device comprises a bottom plate (19) and an upper cover (20), wherein 3 lower supports (11) are arranged on the bottom plate (19), 1 lower support (11) is positioned between the other 2 lower supports (11), a Pelton turbine (13) is fixed on the lower support (11) positioned between the 2 lower supports (11), and bases (3) are fixed on the other 2 lower supports (11);
each base (3) is provided with a self-aligning bearing (2), the self-aligning bearing (2) is embedded with a bearing box (1), and a fluid radial sliding bearing (21) to be tested is arranged in the bearing box (1); one end of the bearing box (1) is connected with a locking frame (4), and the other end of the bearing box is connected with a displacement measuring frame (8); a lock cylinder hole (4-1) is formed in the locking frame (4), a lock cylinder (5) penetrates through the lock cylinder hole (4-1), the lock cylinder (5) is fixed in the lock cylinder hole (4-1), and the lock cylinder (5) penetrates into the lock cylinder hole (4-1) of the locking frame (4) and abuts against the base (3);
the displacement measurement frame (8) is provided with a displacement sensor access hole (8-1) and is connected to a displacement sensor (15), and the displacement sensor (15) is inserted into the displacement sensor access hole (8-1);
the upper part of the base (3) is connected with an upper support (10), the upper support (10) is connected with an upper cover (20), and an S-shaped force sensor (16) is arranged in the upper support (10); a film type force sensor (17) is arranged between the lower bracket (11) and the bottom plate (19);
the device is also provided with a shaft (12), and a non-contact speed sensor (18) is arranged at the non-driving end of the shaft (12); the method for realizing the automatic centering and locking function by enabling the two ends of the shaft (12) to penetrate through the fluid radial sliding bearing to be tested comprises the following steps: the shaft (12) presses the two fluid radial sliding bearings to be tested, the self-aligning bearing (2) can automatically adjust the angular deviation, and the self-aligning bearing (2) automatically adjusts the axes of the shaft (12) and the axes of the two fluid radial sliding bearings to be tested, so that the axes of the three are parallel to each other, and the axes of the two fluid radial sliding bearings to be tested are superposed; the lock cylinder (5) is inserted into a lock cylinder hole (4-1) of the locking frame (4) and is pressed against the base (3) and fastened, so that the relative position of the fluid radial sliding bearing to be tested is locked;
the device is also provided with a motor (14), a power output shaft of the motor (14) is in transmission connection with the shaft (12), and the Pelton turbine (13) is connected to the middle part of the shaft (12).
2. The bearing-rotor experiment table with the automatic centering and locking functions as claimed in claim 1, wherein: the bearing box (1) is in interference connection with the self-aligning bearing (2), a bearing box lubricant supply hole (1-1) is formed in the bearing box (1), a locking frame lubricant supply hole (4-3) is formed in the locking frame (4), the bearing box lubricant supply hole (1-1) is aligned with the locking frame lubricant supply hole (4-3), and a lubricant supply pipe (6) is connected;
a lubricant channel (1-2) is arranged in the bearing box (1) and used for supplying lubricant to the fluid radial sliding bearing to be tested; the bearing box (1) is provided with ear-shaped fins (1-3) and circumferential lockholes (1-4), and the lock column (5) penetrates through the circumferential lockholes (1-4) to prevent the bearing box (1) from rotating;
the bearing box (1) is provided with displacement measuring holes (1-5) and is aligned with displacement sensor access holes (8-1) in the displacement measuring frame (8);
the bearing box (1) is provided with a positioning shoulder A (1-6) and a positioning shoulder B (1-7).
3. The bearing-rotor experiment table with the automatic centering and locking functions as claimed in claim 1, wherein: the shaft (12) can be installed into a balance weight disc (12-1), and a balance weight bolt (12-2) is screwed on the balance weight disc (12-1) and is used for adjusting the balance load and the unbalance load of the fluid radial sliding bearing to be tested.
4. The bearing-rotor experiment table with the automatic centering and locking functions as claimed in claim 1, wherein: the upper support (10) comprises a first upper support (10-1), an S-shaped force sensor (16) and a second upper support (10-2), the first upper support (10-1), the S-shaped force sensor (16) and the second upper support (10-2) are fixedly connected together, and the S-shaped force sensor (16) is located between the first upper support (10-1) and the second upper support (10-2);
an upper bracket bolt hole (10-1-1) and an upper bracket tenon (10-1-2) are arranged on the first upper bracket (10-1), and an upper cover mortise (20-1) and a plurality of upper cover bolt holes (20-2) are arranged on the upper cover (20);
the upper support tenon (10-1-2) of the first upper support (10-1) is inserted into the upper cover mortise (20-1) of the upper cover (20), the first upper support (10-1) can move along the upper cover mortise (20-1) of the upper cover (20) under the action of the upper support tenon (10-1-2), and a first fastening bolt is further arranged and screwed on the upper support bolt hole (10-1-1) of the first upper support (10-1) and the upper cover bolt hole (20-2) of the upper cover (20), so that the first upper support (10-1) is fixed on the upper cover (20), and the upper support (10) is fixed on the upper cover (20);
the lower support (11) is provided with a lower support bolt hole (11-1) and a lower support tenon (11-2), and the bottom plate (19) is provided with a bottom plate mortise (19-1) and a plurality of bottom plate bolt holes (19-2);
the lower support tenon (11-2) of the lower support (11) is inserted into the bottom plate mortise (19-1) of the bottom plate (19), the lower support (11) can move along the bottom plate mortise (19-1) of the bottom plate (19) under the action of the lower support tenon (11-2), and a second fastening bolt is further arranged and screwed in the lower support bolt hole (11-1) of the lower support (11) and the bottom plate bolt hole (19-2) of the bottom plate (19), so that the lower support (11) is fixed on the bottom plate (19);
a second upper bracket bolt hole (10-2-1) is formed in the second upper bracket (10-2), and a base connecting bolt hole (11-3) is formed in one end, facing the base (3), of the lower bracket (11); an upper base bolt hole (3-1) and a lower base bolt hole (3-2) are formed in the base (3); an upper base bolt hole (3-1) of the base (3) corresponds to a second upper support bolt hole (10-2-1) of a second upper support (10-2), and a first base fastening bolt is screwed in the upper base bolt hole (3-1) and the second upper support bolt hole (10-2-1) so that the second upper support (10-2) and the base (3) are fixed, and the upper support (10) is fixed with the base (3); and a lower base bolt hole (3-2) of the base (3) corresponds to a base connecting bolt hole (11-3) of the lower support (11), and a second base fastening bolt is screwed in the lower base bolt hole (3-2) and the base connecting bolt hole (11-3) so that the lower support (11) and the base (3) are fixed.
5. The bearing-rotor experiment table with the automatic centering and locking functions as claimed in claim 1, wherein: the self-aligning bearing (2) is arranged in the base (3) and is fastened by a fixing ring (9) and a gland (7).
6. The bearing-rotor experiment table with the automatic centering and locking functions as claimed in claim 1, wherein: one end of the bearing box (1) is connected with the locking frame (4) through a bolt, and the other end of the bearing box is connected with the displacement measuring frame (8) and fastened by a fixing ring (9).
7. The bearing-rotor experiment table with the automatic centering and locking functions as claimed in claim 1, wherein: the locking frame (4) is provided with a locking protrusion, the locking protrusion is provided with a lock cylinder hole (4-1) and a circumferential bolt hole (4-2), one side, facing the locking frame (4), of the hole wall of the lock cylinder hole (4-1) is provided with a gap (4-4), the circumferential bolt hole (4-2) is arranged on the locking protrusion on two sides of the gap (4-4), the lock cylinder (5) penetrates through the lock cylinder hole (4-1), the circumferential bolt hole (4-2) on the locking protrusion on two sides of the gap (4-4) is screwed with a bolt, so that the gap (4-4) is reduced, the aperture of the lock cylinder hole (4-1) is reduced, and the lock cylinder (5) is clamped and fastened on the locking frame (4); the lock cylinder (5) penetrates into a lock cylinder hole (4-1) of the locking frame (4) and props against the base (3), and the relative position of a fluid radial sliding bearing to be tested is locked by utilizing a circumferential bolt hole (4-2);
the gap (4-4) of the locking frame (4) is used for fastening the lock column (5) in the circumferential direction; the lock cylinder hole (4-1) of the locking frame (4) is in clearance fit with the lock cylinder (5).
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