A vertical rubber guide bearing contrast test bench device

Abstract

The application belongs to the technical field of test device for nuclear power plant, and particularly relates to a vertical rubber guide bearing comparison test bench device. In the device, a motor drives two test bearing parts through a transmission part; the test bearing part comprises a test rotor part and a stator part; the test rotor part comprises a test main shaft; the test stator part comprises a base and a test box body fixed on the base; the test main shaft is installed in the test box body; a bearing body is located above the test main shaft and is provided with a plurality of through holes on the circumference; guide bearing blocks are connected with the bearing body through the through holes; a water inlet chamber is installed above the bearing body, and an upper support bearing is installed above the water inlet chamber. The device avoids the influence of the weight of a horizontal structure rotor on test results, can perform double-drag comparison test, can fully simulate the actual operation condition on site, and overcomes the influence of some factors such as the weight of the rotor and external force loading on test results.

Description

Technical Field

[0001] This application belongs to the technical field of test equipment for nuclear power plants, specifically relating to a vertical rubber guide bearing comparative test bench device. Background Technology

[0002] A nuclear power plant has eight vertical seawater circulation pumps installed in Units 1 and 2. The rubber guide bearings are vulnerable components and require periodic replacement. To verify that the rubber guide bearings meet the original usage requirements, a large vertical comparative test bench is needed.

[0003] In the past, most test benches were small or horizontal structures, which could not be used for comparative tests, could not meet the operating conditions of large-sized guide bearings and the actual simulation of field use conditions, could not solve the influence of the rotor's own weight on the test results, and could not simulate the external forces actually generated when the equipment was running. Summary of the Invention

[0004] The purpose of this application is to provide a vertical rubber guide bearing comparative test bench device to solve the problems in the prior art that cannot overcome the influence of the rotor's own weight on the test results and that the external force loading test cannot fully simulate the actual operation on site.

[0005] The technical solution to achieve the purpose of this application is as follows:

[0006] This application provides a vertical rubber guide bearing comparative test bench device, the device including: a driving part, a transmission part and two test bearing parts;

[0007] The drive section includes: a motor; the motor drives the two test load-bearing sections via the transmission section; the test load-bearing section includes: a test rotor section and a stator section;

[0008] The test rotor includes a test spindle; the upper shaft head of the test spindle is bolted to the second universal joint coupling to transmit torque; the inner hole of the upper support bushing is fitted into the upper part of the test spindle with a clearance fit; the inner hole of the counterweight plate is fitted into the upper part of the test spindle with a clearance fit; the upper support bushing is locked in place by an upper lock nut; the counterweight block is threaded into the threaded hole of the counterweight plate and installed on top of it; the weight of the test rotor is borne by an angular contact ball bearing in the upper rolling bearing housing.

[0009] The test stator includes a base and a test housing fixed on the base; the test spindle is installed inside the test housing; the bearing body is located above the test spindle and has several through holes drilled on its circumference; the guide bearing block is connected to the bearing body through the through holes.

[0010] The water inlet chamber is bolted and installed above the bearing housing, while the upper support bearing is installed above the water inlet chamber; each component has a sealing groove and is sealed with O-rings.

[0011] Optionally, the motor is vertically mounted on the motor bracket using a stop-gauge positioning method, and the motor bracket is mounted on the base using a stop-gauge positioning method, and the motor bracket is also fixed to the base using bolts.

[0012] Optionally, the transmission part includes: a first transmission shaft, a second transmission shaft, a pulley support shaft, a driving pulley, a first driven pulley, and a second driven pulley;

[0013] The motor shaft is inserted into the inner hole of the drive pulley with a clearance fit and connected by a key. The rotation of the motor shaft drives the drive pulley to rotate. The drive pulley is connected to the first driven pulley and the second driven pulley respectively via two belts. The rotation of the drive pulley drives the first and second driven pulleys to rotate simultaneously. Tensioners are installed on both sides to adjust the belt tension. The first and second driven pulleys have different diameters than the drive pulley.

[0014] The upper end of the pulley support shaft is inserted into the inner hole of the drive pulley with a clearance fit and connected by a key. The rotation of the drive pulley drives the pulley support shaft to rotate simultaneously. The lower end of the pulley support shaft is installed into the inner hole of a deep groove ball bearing, and the outer ring of the deep groove ball bearing is installed into the inner hole of the pulley support bearing body with an interference fit, thus supporting the drive pulley. The pulley support bearing body is connected to the base base by bolts and installed on top of the base base plate.

[0015] The shaft ends of the first drive shaft and the second drive shaft are installed into the inner holes of the first driven pulley and the second driven pulley. The inner holes of the first driven pulley and the second driven pulley have a tapered sleeve tensioning structure. By tightening the bolts on the end face of the tapered sleeve, a tensioning force is generated. The tensioning force connects them to each other, thereby transmitting torsional torque.

[0016] The first drive shaft is installed into the inner hole of the first spacer sleeve with a clearance fit. The first spacer sleeve is located between each pair of angular contact ball bearings to control the spacing and support the weight of the rolling bearings. The first drive shaft is also installed into the inner hole of a pair of angular contact ball bearings with an interference fit. Tightening the first locking nut can fix the inner ring of the first spacer sleeve and the inner ring of the pair of angular contact bearings to the first drive shaft.

[0017] The second drive shaft is installed into the inner hole of the second spacer sleeve with a clearance fit. The second spacer sleeve is in the middle of each pair of angular contact ball bearings to control the spacing and support the weight of the rolling bearings. The second drive shaft is also installed into the inner hole of a pair of angular contact ball bearings with an interference fit. Tightening the lock nut can fix the inner ring of the second spacer sleeve and the inner ring of the pair of angular contact bearings to the second drive shaft.

[0018] The first universal joint coupling is connected to the first drive shaft by bolts, and the second universal joint coupling is connected to the second drive shaft by bolts. Both the first and second universal joint couplings are cross-shaped shafts.

[0019] Optionally, the driving pulley, the first driven pulley, and the second driven pulley have a sawtooth structure.

[0020] Optionally, a pair of angular contact ball bearing outer rings are interference-fitted into the upper rolling bearing housing; a first spacer is installed between the two angular contact bearings, contacting the bearing outer rings to provide support and adjust the spacing; the bolts on the upper bearing cap are tightened, locking the angular contact bearing outer rings into the inner bore of the upper rolling bearing housing; the upper rolling bearing housing is bolted to the upper test support, and the upper test support is bolted to the base.

[0021] Optionally, the test chamber includes: a lower test chamber, a middle test chamber, and an upper test chamber;

[0022] The lower test chamber is connected to the upper part of the mounting base using locating bolts; the middle test chamber is connected to the lower test chamber using locating bolts and installed on the upper part of the lower test chamber; the upper test chamber is connected to the middle test chamber using locating bolts and installed on the upper part of the middle test chamber; the lower bearing support is installed on the upper part of the lower test chamber; the lower guide bearing is installed on the upper part of the lower bearing support; the lower part of the test spindle is inserted into the inner hole of the lower guide bearing.

[0023] Optionally, the outer ring of the guide bearing block is made of steel plate, and the inner ring is made of rubber. The rubber is vulcanized onto the steel plate through a vulcanization process, and there are threaded holes on the outer side of the steel plate.

[0024] Optionally, the device further includes: a water tank;

[0025] The simulated seawater in the tank is lifted by a submersible pump, and the first and second branches are connected to the two inlet chambers through the main pipeline. The simulated seawater returns to the tank through the return water pipeline of the upper support bearing and the lower test chamber.

[0026] Optionally, the counterweight disc has multiple threaded holes drilled along the circumference, which are connected to several counterweight blocks through threads. By increasing or decreasing the number of counterweight blocks, the magnitude of the centrifugal force generated when the rotor is running can be changed, thereby realizing the variable loading of the external load on the guide bearing block.

[0027] The beneficial technical effects of this application are as follows:

[0028] (1) The vertical rubber guide bearing comparative test bench device provided in this application avoids the influence of the weight of the horizontal structure rotor on the test results, avoids the influence of rigid connection on the test effect, can carry out dual drag comparative test, can fully simulate the actual operation on site, and overcome the influence of rotor weight and external force loading on the test results.

[0029] (2) The vertical rubber guide bearing comparative test bench device provided in this application embodiment has a built-in cooling water chamber design to cool the device and can meet the requirements of long-term continuous operation test for at least 6 months.

[0030] (3) The vertical rubber guide bearing comparative test bench device provided in this application has a locating joint between the top plate, the base and the inner and outer diameter of the test chamber. The fit clearance can be guaranteed to be 0.15mm through precise machining. The centering of the large test bench can be solved by precise locating joint positioning, and the bench can operate stably. Attached Figure Description

[0031] Figure 1 and Figure 2 A schematic diagram of the structure of a vertical rubber guide bearing comparative test bench device provided in the embodiments of this application;

[0032] Figure 3 This is a schematic diagram of the drive section in a vertical rubber guide bearing comparative test bench device provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the transmission part in a vertical rubber guide bearing comparative test bench device provided in an embodiment of this application;

[0034] Figure 5 A top view of the transmission part in a vertical rubber guide bearing comparative test bench device provided in an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the test load-bearing part in a vertical rubber guide bearing comparative test bench device provided in an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the test bearing rotor part in a vertical rubber guide bearing comparative test bench device provided in an embodiment of this application;

[0037] Figure 8 A schematic diagram of the test load-bearing stator part in a vertical rubber guide bearing comparative test bench device provided in this application embodiment;

[0038] Figure 9 A partial structural diagram of the counterweight plate area in a vertical rubber guide bearing comparative test bench device provided in an embodiment of this application;

[0039] Figure 10 A schematic diagram of the circulating water system and cooling water system in a vertical rubber guide bearing comparative test bench device provided for an embodiment of this application;

[0040] Figure 11 This is a schematic diagram of the cooling water cavity in a vertical rubber guide bearing comparative test bench device provided in an embodiment of this application.

[0041] In the picture:

[0042] 1-Base; 2-Lower test chamber; 3-Intermediate test chamber; 4-Upper test chamber; 5-Test support; 6-Foundation base; 7-Lower bearing support; 8-Lower guide bearing; 9-Test spindle; 10-Bearing body; 11-Guide bearing block; 12-Water inlet chamber; 13-Upper support bearing; 14-Upper support bushing; 15-Counterweight plate; 16-Counterweight block; 17-Second universal joint coupling; 18-Upper rolling bearing body; 19-First spacer sleeve; 20-Second spacer sleeve; 21-Upper bearing cover; 22-Tighten the lock nut; 23-Second drive shaft; 24-First driven pulley; 25-First drive shaft; 26-Second driven pulley; 27-Pulley support bearing body; 28-Pulley support shaft; 29-Drive pulley; 30-Motor bracket; 31-Motor; 1a-First branch; 1b-Second branch. Detailed Implementation

[0043] To enable those skilled in the art to better understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Based on the embodiments described in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] See Figure 1-11 The present application provides a vertical rubber guide bearing comparative test bench device, which includes: a driving part, a transmission part and two test load-bearing parts;

[0045] The drive section includes: a motor 31; the motor 31 drives the two test bearing sections via the transmission section; the test bearing section includes: a test rotor section and a stator section;

[0046] It should be noted that the structures of the two test load-bearing parts are similar. For ease of explanation, only one test load-bearing part will be used as an example here. The structure of the other test load-bearing part is similar and will not be described in detail here.

[0047] The test rotor includes a test spindle 9; the upper shaft head of the test spindle 9 is bolted to the second universal joint coupling 17 to transmit torque; the inner hole of the upper support bushing 14 is fitted into the upper part of the test spindle 9 with clearance fit; the inner hole of the counterweight plate 15 is fitted into the upper part of the test spindle 9 with clearance fit; the upper support bushing 14 is locked by an upper locking nut; the counterweight block 16 is threaded into the threaded hole of the counterweight plate 15 and installed on top of it; the weight of the test rotor is borne by the angular contact ball bearing in the upper rolling bearing body 18;

[0048] The test stator includes a base 1 and a test chamber fixed on the base 1; the test spindle 9 is installed in the test chamber; the bearing body 10 is located above the test spindle 9 and has several through holes drilled on its circumference; the guide bearing block 11 is connected to the bearing body 10 through the through holes.

[0049] The water inlet chamber 12 is bolted and installed above the bearing body 10, and the upper support bearing 13 is installed above the water inlet chamber 12; there are sealing grooves between each component, and O-rings are used for sealing.

[0050] For large-scale operational simulation tests, rotors are generally quite heavy. If a horizontal structure is used to simulate actual operation, eccentric grinding may occur, leading to severe one-sided wear of the rubber guide bearings, which affects the test results. In this embodiment, the two test load-bearing parts are vertically symmetrically arranged, using a vertical test bench. The rotor's weight is parallel to the rubber guide bearings, and the circumferential rotation speed is uniform, avoiding uneven wear caused by the rotor perpendicular to the rubber guide bearings and ensuring accurate test data.

[0051] In one example, the motor 31 is vertically mounted on the motor bracket 30 using a stop-positioning method and is fixed to each other with bolts. The motor bracket 30 is mounted on the base 6 using a stop-positioning method and is fixed to each other with bolts.

[0052] In some possible implementations of the embodiments of this application, the transmission part includes: a first transmission shaft 25, a second transmission shaft 23, a pulley support shaft 28, a driving pulley 29, a first driven pulley 24, and a second driven pulley 26;

[0053] The motor 31 shaft is inserted into the inner hole of the drive pulley 29 with a clearance fit and connected by a key. The rotation of the motor 31 shaft drives the drive pulley 29 to rotate. The drive pulley 29 is connected to the first driven pulley 24 and the second driven pulley 26 via two belts. The rotation of the drive pulley 29 drives the first driven pulley 24 and the second driven pulley 26 to rotate simultaneously. Tensioners are installed on both sides to adjust the belt tension. The first driven pulley 24 and the second driven pulley 26 have different diameters than the drive pulley 29.

[0054] The upper end of the pulley support shaft 28 is inserted into the inner hole of the drive pulley 29 with a clearance fit and connected by a key. The rotation of the drive pulley 29 drives the pulley support shaft 28 to rotate simultaneously. The lower end of the pulley support shaft 28 is installed into the inner hole of a deep groove ball bearing, and the outer ring of the deep groove ball bearing is installed into the inner hole of the pulley support bearing body 27 with an interference fit, thereby supporting the drive pulley 29. The pulley support bearing body 27 is connected to the base 6 by bolts and installed on the top of the base 6 plate.

[0055] The shaft ends of the first drive shaft 25 and the second drive shaft 23 are inserted into the inner holes of the first driven pulley 24 and the second driven pulley 26. The inner holes of the first driven pulley 24 and the second driven pulley 26 have a tapered sleeve tensioning structure. By tightening the bolts on the end face of the tapered sleeve, a tensioning force is generated. The tensioning force connects them to each other, thereby transmitting torsional torque.

[0056] The first drive shaft 25 is installed into the inner hole of the first spacer sleeve 19 with a clearance fit. The first spacer sleeve 19 is located between each pair of angular contact ball bearings, which controls the spacing and supports the weight of the rolling bearings. The first drive shaft 25 is also installed into the inner hole of a pair of angular contact ball bearings with an interference fit. Tightening the first locking nut can fix the inner ring of the first spacer sleeve and the inner ring of the pair of angular contact bearings to the first drive shaft 25.

[0057] The second drive shaft 23 is installed into the inner hole of the second spacer sleeve 20 with a clearance fit. The second spacer sleeve 20 is located between each pair of angular contact ball bearings, which controls the spacing and supports the weight of the rolling bearings. The second drive shaft 23 is also installed into the inner hole of a pair of angular contact ball bearings with an interference fit. Tightening the lock nut 22 can fix the inner ring of the second spacer sleeve 20 and the inner ring of the pair of angular contact bearings to the second drive shaft 23.

[0058] The first universal joint coupling is connected to the first drive shaft 25 by bolts, and the second universal joint coupling 17 is connected to the second drive shaft 23 by bolts. The first universal joint coupling and the second universal joint coupling 17 are cross shaft structures.

[0059] In one example, the driving pulley 29, the first driven pulley 24, and the second driven pulley 26 have a sawtooth structure.

[0060] In some possible implementations of this application, a pair of angular contact ball bearing outer rings are interference-fitted into the upper rolling bearing body 18; a first spacer sleeve 19 is installed between the two angular contact bearings, contacting the bearing outer rings and serving to support and adjust the spacing; the bolts on the upper bearing cap 21 are tightened, locking the angular contact bearing outer rings into the inner hole of the upper rolling bearing body 18; the upper rolling bearing body 18 is bolted to the upper test support 5, and the upper test support 5 is bolted to the base 6 below.

[0061] In another example, the test chamber includes: a lower test chamber 2, a middle test chamber 3, and an upper test chamber 4;

[0062] The lower test chamber 2 is connected to the upper part of the mounting base 1 using a stop-and-position bolt; the middle test chamber 3 is connected to the lower test chamber 2 using a stop-and-position bolt and installed above the lower test chamber 2; the upper test chamber 4 is connected to the middle test chamber 3 using a stop-and-position bolt and installed above the middle test chamber 3; the lower bearing support 7 is installed above the lower test chamber 2; the lower guide bearing 8 is installed above the lower bearing support 7; the lower part of the test spindle 9 is inserted into the inner hole of the lower guide bearing 8.

[0063] As an example, the outer ring of the guide bearing block 11 is made of steel plate, and the inner ring is made of rubber. The rubber is vulcanized onto the steel plate through a vulcanization process, and there are threaded holes on the outer side of the steel plate.

[0064] In some possible implementations of the embodiments of this application, the device further includes: a water tank;

[0065] The simulated seawater in the water tank is lifted by a submersible pump, and the first branch 1a and the second branch 1b are connected to the two water inlet chambers 12 at the same time through the main pipeline. The simulated seawater returns to the water tank through the return water pipeline of the upper support bearing 13 and the lower test chamber 2.

[0066] In some possible implementations of the embodiments of this application, the counterweight disk 15 is drilled with multiple threaded holes along the circumferential direction and is connected to several counterweight blocks 16 through threads. By increasing or decreasing the number of counterweight blocks 16, the magnitude of the centrifugal force generated when the rotor is running is changed, thereby realizing the variable loading of external load on the guide bearing block 11.

[0067] The following is a detailed explanation of a vertical rubber guide bearing comparative test bench device provided in this application embodiment, using a specific example.

[0068] The vertical rubber guide bearing comparative test bench device provided in this application includes: a driving part, a transmission part, a test bearing part, a loading part, and an auxiliary part.

[0069] Drive section: Motor 31 is positioned by a stop and is vertically mounted on top of motor bracket 30 and fixed together with bolts. Motor bracket 30 is positioned by a stop and is mounted on top of base 6 and fixed together with bolts.

[0070] Transmission components:

[0071] The motor shaft 31 is inserted into the inner hole of the drive pulley 29 with a clearance fit and connected by a key. The rotation of the motor shaft drives the drive pulley 29 to rotate. The drive pulley 29 is connected to the first driven pulley 24 and the second driven pulley 26 via two belts. The rotation of the drive pulley 29 simultaneously drives the first driven pulley 24 and the second driven pulley 26 to rotate. Tensioners are installed on both sides to adjust the belt tension. The first driven pulley 24 and the second driven pulley 26 have different diameters from the drive pulley 29, with a diameter ratio of 1:2, serving as a speed-changing transmission. The synchronous pulley has a sawtooth structure to avoid the slippage problem of ordinary pulleys.

[0072] The upper end of the pulley support shaft 28 is inserted into the inner hole of the drive pulley 29 with a clearance fit and connected by a key. The rotation of the drive pulley 29 drives the pulley support shaft 28 to rotate simultaneously. The lower end of the pulley support shaft 28 is installed into the inner hole of a deep groove ball bearing, and the outer ring of the deep groove ball bearing is installed into the inner hole of the pulley support bearing body 27 with an interference fit, thus supporting the drive pulley 29. The pulley support bearing body 27 is connected to the base 6 by bolts and installed above the base 6 plate.

[0073] The first drive shaft 25 and the second drive shaft 23 are inserted into the inner holes of the first driven pulley 24 and the second driven pulley 26, respectively. The inner holes of the first driven pulley 24 and the second driven pulley 26 have a tapered sleeve tensioning structure. By tightening the bolts on the end faces of the tapered sleeves, tension is generated, and the pulleys are connected through this tension to transmit torsional torque. The second drive shaft 23 is installed into the inner hole of the second spacer sleeve 20 with a clearance fit. The second spacer sleeve 20 is located between each pair of angular contact ball bearings, controlling the spacing and supporting the weight of the rolling bearings. The second drive shaft 23 is also installed into the inner holes of a pair of angular contact ball bearings with an interference fit. Tightening the lock nut 22 fixes the inner ring of the second spacer sleeve 20 and the inner rings of the pair of angular contact bearings to the second drive shaft 23. The structure of the first drive shaft 25 on the right side is the same and will not be described further here.

[0074] A pair of angular contact ball bearing outer rings are interference-fitted into the upper rolling bearing housing 18. A first spacer sleeve 19 is installed between the two angular contact bearings, contacting the bearing outer rings and providing support for adjusting the spacing. Tightening the bolts on the upper bearing cap 21 locks the angular contact bearing outer rings into position within the inner bore of the upper rolling bearing housing 18. After the above modules are installed, the upper rolling bearing housing 18 is bolted onto the upper test support 5, which is then bolted to the base 6 below.

[0075] Universal joint coupling 17 is connected to the first drive shaft 25 and the second drive shaft 23 by bolts. Universal joint coupling 17 has a cross shaft structure and is a flexible connection, which can reduce the tilt angle caused by the unbalanced loading device at the bottom and reduce the shear force on each drive shaft.

[0076] Test load-bearing section: includes the test rotor section and stator section.

[0077] In the rotor section, the upper shaft head of the test spindle 9 is bolted to the universal joint coupling 17, simultaneously transmitting torque. The inner hole of the upper support bushing 14 is fitted into the upper part of the test spindle 9 with a clearance fit, as is the inner hole of the counterweight disc 15. The upper support bushing 14 is secured above the upper support bushing 14 with an upper locking nut. The counterweight block 16 is threaded into the threaded hole of the counterweight disc 15 and installed above it. Rotation of the test spindle 9 drives the two components and the counterweight block 16 to rotate. During assembly, a 2mm axial clearance is maintained between the test spindle 9 and the lower guide bearing 8. The entire rotor weight is borne by the angular contact ball bearing in the upper rolling bearing housing 18.

[0078] The stator section of the test unit consists of: a base 1 and a lower test chamber 2, positioned by a stop and bolted together, with the lower test chamber 2 mounted on top of the base 1; a middle test chamber 3 and a middle test chamber 3, positioned by a stop and bolted together, mounted on top of the middle test chamber 2; and an upper test chamber 4 and a middle test chamber 3, positioned by a stop and bolted together, mounted on top of the upper test chamber 4. A lower bearing support 7 and a lower test chamber 2, positioned by a stop and bolted together, are mounted on top of the lower test chamber 2. A lower guide bearing 8 and a lower bearing support 7, positioned by a stop and bolted together, are mounted on top of the lower guide bearing 8. The lower part of the test spindle 9 is fitted into the inner hole of the lower guide bearing 8, which limits the radial wobble of the rotor.

[0079] There are six guide bearing blocks 11 in total. The outer ring is made of steel plate, and the inner ring is made of rubber. The rubber is vulcanized onto the steel plate through a vulcanization process. The outer side of the steel plate has threaded holes. The bearing body 10 has a split structure, consisting of two halves connected by bolts and locating pins. When assembled, it forms a single unit. Several through holes are drilled on the circumference of the bearing body 10. The guide bearing blocks 11 are bolted to the bearing body 10 through the through holes drilled on the circumference and to the threaded holes on the outer side of its own steel plate.

[0080] The bearing housing 10 is positioned with a stop and bolted to the intermediate test chamber 3, and is installed inside it. The water inlet chamber 12 is bolted and installed above the bearing housing 10. The upper support bearing 13 is positioned with a stop and bolted to the water inlet chamber 12, and is installed above the water inlet chamber 12. Each component has a sealing groove, sealed with O-rings. The stator and rotor sections form a circulating water chamber. Simulated seawater in the water tank is pumped in by a submersible pump, circulated through the water inlet chamber 12, and discharged through the lower test chamber 2 and the upper support bearing 13, returning to the water tank through the pipeline system, thereby achieving cooling and lubrication of each guide bearing.

[0081] Loading section: The counterweight disc 15 has threaded holes drilled along its circumference and is connected to several counterweight blocks 16 via threads. By increasing or decreasing the number of counterweight blocks 16, the magnitude of the centrifugal force generated during rotor operation is changed, thereby achieving variable loading of the external load on the guide bearing block 11. The external load on the guide bearing block 11 during actual operation of the seawater circulating pump is simulated, and the degree of bearing wear under different external loads is tested after long-term operation.

[0082] The base 1, lower test chamber 2, middle test chamber 3, upper test chamber 4, upper test support 5, and foundation base 6 are sequentially positioned using stop joints and connected by bolts.

[0083] Auxiliary section: A submersible pump lifts the simulated seawater from the tank, which is then branched into two main pipelines, 1a and 1b, which simultaneously connect to the two inlet chambers 12. The simulated seawater returns to the tank via the upper support bearing 13 and the return water pipelines (i.e., 2a, 2b, 3a, 3b in the diagram) of the lower test chamber 2. The piping system is equipped with monitoring components such as flow meters, valve flow indicators, thermometers, and vibration measuring points to achieve real-time monitoring of noise, temperature, and vibration of the test system, ensuring stable operation of the device.

[0084] In practical implementation, motor 31 can be used as the drive device for the tile wear test apparatus. The motor power is 110KW, the speed is 600r / min, and it adopts a variable frequency motor with stable output. All equipment is installed in the base 1, which facilitates the assembly accuracy and hoisting of the equipment. The common base design and common top plate design ensure the overall alignment of the upper and lower rotors and ensure stable operation over a long period of time.

[0085] It should be noted that traditional test benches and transmission mechanisms mostly use rigid connections when performing external load tests. The application of external loads forces the already properly aligned rotor to shift position, causing wear on supporting components over time, ultimately interrupting the test. This embodiment uses a universal joint coupling 17 and a disc-type external load loading device, namely a counterweight disc 15 and counterweight blocks 16, to achieve a flexible connection, avoiding severe damage to the supporting components caused by rigid connections during prolonged operation. Furthermore, the magnitude of the external load can be changed by increasing or decreasing the number and position of the counterweight blocks 16.

[0086] Previously, test benches were single-unit test benches, allowing only one set of rubber guide bearings to be tested at a time. This application's embodiment features a dual-unit structure, with one driving pulley 29 simultaneously driving the transmission shaft 23, the synchronous pulley including the belt-driven first driving pulley 24, the first transmission shaft 25, the synchronous pulley including the belt-driven second driving pulley 26, and the pulley support bearing housing 27. Therefore, it can simultaneously drive two sets of main shaft rotors 9 to conduct wear tests, making the comparative test results more accurate.

[0087] Because the test bench needs to operate for extended periods, the guide bearing and bushing will rub against each other for a long time, generating a large amount of heat that cannot be dissipated. This affects the actual wear condition of the guide bearing after the test. Previous test benches were designed without a cooling water chamber, making continuous operation for extended periods impossible. This application's embodiment features a separately designed cooling water chamber, using flowing water to carry away the heat generated during prolonged operation and cool the device. This allows for continuous operation testing for at least 6 months, ensuring accurate detection of wear conditions after the test.

[0088] The following example illustrates in detail the specific usage of a vertical rubber guide bearing comparative test bench device provided in this application.

[0089] The test mainly simulates the friction pair formed by the relative rotation of the water-lubricated bearing and the test shaft to simulate actual working conditions. Through comparative performance tests, it is determined whether the rubber bearing bush meets the imported bearing bush standard.

[0090] Water-lubricated bearings were used as test objects on the test bench. The test loading force was calculated and the drive scheme was designed. The technical parameters are shown in the table below.

[0091]

[0092] Test rotational speed: n = 0~300 rp / min

[0093] Main parameters and technical specifications of the experiment:

[0094] 1) Drive system: 110kW vertical motor, 600r / min speed, 10-pole motor;

[0095] 2) Lubricating medium: Closed-loop circulating water lubrication; water temperature: room temperature to 30℃; water pressure: 50 to 100 kPa; minimum flow rate: 0.3 L / (min·mm) 2 All of these can be adjusted, and the lubricating water is mixed and formulated to mimic the proportions of seawater, with the addition of mud and sand;

[0096] 3) Radial loading system: External load is applied by counterweights, and the load magnitude is changed by increasing or decreasing the weight of the counterweights;

[0097] 4) Monitoring of vibration, noise, and inlet / outlet water temperature;

[0098] 5) The machine needs to be stopped 1-2 times during operation to disassemble the bearings and observe the wear.

[0099] 6) It has been running for a total of 6 months.

[0100] Experimental steps:

[0101] (1) Install the bearing load test device according to the diagram and place it on the base 1.

[0102] Assemble the sealing components according to the drawing. The stator component base 6, lower test chamber 2, middle test chamber 3, upper test chamber 4, and upper test support 5 are installed on the base 1. The first driven pulley 24, first drive shaft 25, second driven pulley 26, pulley support bearing 27, drive pulley 29, and test main shaft 9 are installed in sequence. The sealing components are then pre-installed. The entire assembly is lifted by a crane and installed vertically downwards. After it is in place, the sealing box bolts are tightened in sequence.

[0103] (2) Install the pulley and motor 31 on the base 1, adjust the rotor alignment and lock it.

[0104] (3) Adjust the external load by increasing or decreasing the weight of the counterweight 16 according to the required load size.

[0105] (4) After adjustment, tighten the connecting bolts of each part.

[0106] (5) Install the piping system.

[0107] (6) Rotate the engine and add oil.

[0108] (7) Start the pipeline system, check for leaks and make appropriate adjustments.

[0109] (8) Start the motor.

[0110] (9) Observe and record the changes in motor current.

[0111] (10) Stop the machine to check the wear of the bearings.

[0112] The present application has been described in detail above with reference to the accompanying drawings and embodiments. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present application. All content not described in detail in this application can be derived from existing technology.

Claims

1. A vertical rubber guide bearing comparative test bench device, characterized in that, The device includes: a drive section, a transmission section, and two test load sections; The driving part includes: a motor (31); the motor (31) drives the two test bearing parts through the transmission part; the test bearing part includes: a test rotor part and a stator part; The test rotor includes a test spindle (9); the upper shaft head of the test spindle (9) is bolted to the second universal joint coupling (17) to transmit torque; the inner hole of the upper support bushing (14) is fitted into the upper part of the test spindle (9) with clearance fit; the inner hole of the counterweight plate (15) is fitted into the upper part of the test spindle (9) with clearance fit; the upper support bushing (14) is locked by an upper locking nut; the counterweight block (16) is screwed into the threaded hole of the counterweight plate (15) through a threaded connection and installed on top of it; the weight of the test rotor is borne by the angular contact ball bearing in the upper rolling bearing body (18); The test stator includes a base (1) and a test chamber fixed on the base (1); the test spindle (9) is installed in the test chamber; the bearing body (10) is located above the test spindle (9) and has several through holes drilled on its circumference; the guide bearing block (11) is connected to the bearing body (10) through the through holes; The water inlet chamber (12) is bolted and installed above the bearing body (10), and the upper support bearing (13) is installed above the water inlet chamber (12); there are sealing grooves between each component, and O-rings are used for sealing.

2. The vertical rubber guide bearing comparative test bench device according to claim 1, characterized in that, The motor (31) is vertically mounted on the motor bracket (30) with a stop-positioning method and fixed to each other with bolts. The motor bracket (30) is mounted on the base (6) with a stop-positioning method and fixed to each other with bolts.

3. The vertical rubber guide bearing comparative test bench device according to claim 1, characterized in that, The transmission part includes: a first transmission shaft (25), a second transmission shaft (23), a pulley support shaft (28), a driving pulley (29), a first driven pulley (24), and a second driven pulley (26); The motor (31) shaft is inserted into the inner hole of the drive pulley (29) with clearance fit and key connection. The rotation of the motor (31) shaft drives the drive pulley (29) to rotate. The drive pulley (29) is connected to the first driven pulley (24) and the second driven pulley (26) respectively through two belts. The rotation of the drive pulley (29) drives the first driven pulley (24) and the second driven pulley (26) to rotate simultaneously. Tensioning pulleys are installed on both sides to adjust the belt tension. The diameter of the first driven pulley (24) and the second driven pulley (26) is different from that of the drive pulley (29). The upper shaft end of the pulley support shaft (28) is inserted into the inner hole of the drive pulley (29) with clearance fit and key connection. The rotation of the drive pulley (29) drives the pulley support shaft (28) to rotate simultaneously. The lower shaft end of the pulley support shaft (28) is installed into the inner hole of the deep groove ball bearing, and the outer ring of the deep groove ball bearing is installed into the inner hole of the pulley support bearing body (27) with interference fit, thereby supporting the drive pulley (29). The pulley support bearing body (27) is connected to the base (6) by bolts and installed above the base (6) plate. The shaft ends of the first drive shaft (25) and the second drive shaft (23) are inserted into the inner holes of the first driven pulley (24) and the second driven pulley (26). The inner holes of the first driven pulley (24) and the second driven pulley (26) have a tapered sleeve tensioning structure. By tightening the end face bolts of the tapered sleeve, a tensioning force is generated. The tensioning force connects them to each other and then transmits torsional torque. The first drive shaft (25) is installed into the inner hole of the first spacer sleeve with clearance fit. The first spacer sleeve is in the middle of each pair of angular contact ball bearings to control the spacing and support the weight of the rolling bearings. The first drive shaft (25) is also installed into the inner hole of a pair of angular contact ball bearings with interference fit. Tightening the first locking nut can fix the inner ring of the first spacer sleeve and the inner ring of the pair of angular contact bearings to the first drive shaft (25). The second drive shaft (23) is installed into the inner hole of the second spacer sleeve (20) with clearance fit. The second spacer sleeve (20) is in the middle of each pair of angular contact ball bearings, which controls the spacing and supports the weight of the rolling bearings. The second drive shaft (23) is installed into the inner hole of a pair of angular contact ball bearings with interference fit. Tightening the lock nut (22) can fix the inner ring of the second spacer sleeve (20) and the inner ring of the pair of angular contact bearings to the second drive shaft (23). The first universal joint coupling is connected to the first drive shaft (25) by bolts, and the second universal joint coupling (17) is connected to the second drive shaft (23) by bolts. The first universal joint coupling and the second universal joint coupling (17) are cross shaft structures.

4. The vertical rubber guide bearing comparative test bench device according to claim 3, characterized in that, The driving pulley (29), the first driven pulley (24), and the second driven pulley (26) have a sawtooth structure.

5. The vertical rubber guide bearing comparative test bench device according to claim 3, characterized in that, A pair of angular contact ball bearing outer rings are interference-fitted into the upper rolling bearing housing (18); the first spacer sleeve (19) is installed between the two angular contact bearings, in contact with the bearing outer rings, and serves to support and adjust the spacing; the bolts on the upper bearing cap (21) are tightened, and the outer rings of the angular contact bearings are locked and positioned in the inner hole of the upper rolling bearing housing (18); the upper rolling bearing housing (18) is bolted to the upper test support (5), and the upper test support (5) is bolted to the base (6) below.

6. The vertical rubber guide bearing comparative test bench device according to claim 1, characterized in that, The test chamber includes: a lower test chamber (2), a middle test chamber (3) and an upper test chamber (4); The lower test chamber (2) is connected to the upper part of the mounting base (1) by a stop-positioning bolt; the middle test chamber (3) is connected to the lower test chamber (2) by a stop-positioning bolt and installed on the upper part of the lower test chamber (2); the upper test chamber (4) is connected to the middle test chamber (3) by a stop-positioning bolt and installed on the upper part of the middle test chamber (3); the lower bearing support (7) is installed on the upper part of the lower test chamber (2); the lower guide bearing (8) is installed on the upper part of the lower bearing support (7); the lower part of the test spindle (9) is inserted into the inner hole of the lower guide bearing (8).

7. The vertical rubber guide bearing comparative test bench device according to claim 1, characterized in that, The outer ring of the guide bearing block (11) is made of steel plate, and the inner ring is made of rubber. The rubber is vulcanized onto the steel plate through a vulcanization process. There are threaded holes on the outer side of the steel plate.

8. The vertical rubber guide bearing comparative test bench device according to claim 6, characterized in that, The device also includes: a water tank; The simulated seawater in the water tank is lifted by a submersible pump, and the first branch (1a) and the second branch (1b) are branched off from the main pipeline and connected to the two water inlet chambers (12) at the same time. The simulated seawater returns to the water tank through the return water pipeline of the upper support bearing (13) and the lower test chamber (2).

9. The vertical rubber guide bearing comparative test bench device according to claim 1, characterized in that, The counterweight disc (15) has multiple threaded holes drilled along the circumference and is connected to several counterweight blocks (16) by threads. By increasing or decreasing the number of counterweight blocks (16), the magnitude of the centrifugal force generated when the rotor is running can be changed, thereby realizing the variable loading of the external load on the guide bearing block (11).

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