A high speed bearing oil collection efficiency test device and test method

Abstract

A high-speed bearing oil collection efficiency test device and test method, comprising a spindle box, a spindle, a disassembly ring, a test bearing inner ring, an oil collection nut, an oil collection cylinder, and an oil injection pipe; the spindle is rotatably connected to the spindle box through a bearing; the left end portion of the spindle is fixedly provided with a disassembly ring, a test bearing inner ring, and an oil collection nut in sequence from right to left; the disassembly ring, the test bearing inner ring, and the outer circumference of the oil collection nut are fixedly provided with an oil collection cylinder, and the oil collection cylinder and the disassembly ring, the test bearing inner ring, and the outer circumference of the oil collection nut form an oil collection chamber; when the high-speed bearing oil collection efficiency test is carried out, the lubricating oil is sprayed out through the oil injection port and enters the oil collection chamber through the high-speed rotating oil collection nut; the oil collection nut of the high-speed bearing oil collection efficiency test device is determined through experimental design, so that the test results of the high-speed bearing oil collection efficiency test device and the test method have a reference benchmark, which solves the test problems caused by the lack of standard high-speed bearing oil collection efficiency test device and test method.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed bearing oil collection test, and in particular to a high-speed bearing oil collection efficiency test device and a test method. Background Art

[0002] In addition to the structure and materials of the bearings, lubrication is also a key factor in determining the performance and life of high-speed bearings. Lubrication of high-speed bearings can reduce internal friction and wear of bearings, prevent sticking, extend bearing life, discharge friction heat generated by high-speed rotation of bearings, and prevent bearings from rusting and corrosion. Therefore, simulating the amount of effective lubricating oil that actually enters the bearing during operation is an important supporting data for the optimization design of high-speed bearing structures and the evaluation of dynamic performance in actual use. It is a must-do test item before the design and actual application of high-speed bearings. However, due to the lack of standard high-speed bearing oil recovery efficiency test equipment and test methods, the test results of different test equipment are different, which brings troubles to the high-speed bearing oil recovery efficiency test. Summary of the invention

[0003] In order to overcome the shortcomings of the background technology, the present invention discloses a high-speed bearing oil collection efficiency test device; it includes a spindle box, a spindle, a disassembly ring, a test bearing inner ring, an oil collection nut, an oil collection cylinder, and an oil injection pipe; the spindle is rotatably connected to the spindle box through a bearing; the left end of the spindle is fixedly provided with a disassembly ring, a test bearing inner ring, and an oil collection nut in sequence from right to left; the disassembly ring, the test bearing inner ring, and the outer circumference of the oil collection nut are fixedly provided with an oil collection cylinder, which is fixedly connected to the spindle box by bolts, and the oil collection cylinder and the disassembly ring, the test bearing inner ring, and the outer circumference of the oil collection nut form an oil collection cavity; a gap is provided between the oil collection cylinder and the disassembly ring and the oil collection nut; the oil collection nut is provided with an oil collection nut oil inlet and an oil collection nut oil channel; the lower end of the oil injection pipe is provided with an oil injection port, and the oil injection port is The left side is aligned with the gap between the oil inlet of the oil collecting nut and the main shaft; the main shaft is provided with a main shaft oil channel and a main shaft oil groove near the left end face; the oil inlet of the oil collecting nut is connected with the oil collecting chamber through the oil collecting nut oil channel, the main shaft oil channel, the main shaft oil groove and the bearing inner ring oil channel; when conducting a high-speed bearing oil collection efficiency test, the lubricating oil is sprayed into the high-speed rotating oil collecting nut oil inlet through the oil injection port, and enters the bearing inner ring oil channel through the oil collecting nut oil channel, the main shaft oil channel and the main shaft oil groove. The bearing inner ring rotates at a set speed, and the lubricating oil in the bearing inner ring oil channel is thrown into the oil collecting chamber; after the test, the amount of lubricating oil collected in the oil collecting chamber is compared with the amount of lubricating oil output by the oil injection pipe, so as to obtain the oil collection efficiency of the bearing at the set speed; set different speeds for several tests, so as to obtain the oil collection trend of the high-speed bearing.

[0004] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical scheme: a high-speed bearing oil collection efficiency test device, comprising a spindle box, a spindle, a disassembly ring, a test bearing inner ring, an oil collection nut, an oil collection cylinder, and an oil injection pipe; the spindle is rotatably connected to the spindle box through a bearing, and the rotation of the spindle is used to drive the test bearing inner ring to rotate; the left end portion of the spindle is fixedly provided with a disassembly ring, a test bearing inner ring, and an oil collection nut in sequence from right to left, and the disassembly ring facilitates the disassembly of the test bearing inner ring after the test; the disassembly ring, the test bearing inner ring, and the oil collection nut are fixedly provided with an oil collection cylinder on the outer circumference, and the oil collection cylinder is fixedly connected to the spindle box by bolts, and the oil collection cylinder and the disassembly ring, the test bearing inner ring, and the outer circumference of the oil collection nut form an oil collection cavity, which is used for collecting Collect the lubricating oil entering the inner ring of the test bearing; a gap is provided between the oil collecting cylinder and the disassembly ring and the oil collecting nut to prevent rotational friction between the oil collecting cylinder and the disassembly ring and the oil collecting nut; the oil collecting nut is provided with an oil collecting nut oil inlet and an oil collecting nut oil channel; an oil injection port is provided at the lower end of the oil injection pipe, and the oil injection port is aimed at the gap between the oil inlet of the oil collecting nut and the main shaft from the left side; the main shaft is provided with a main shaft oil channel and a main shaft oil groove near the left end face; the oil inlet of the oil collecting nut is connected with the oil collecting chamber through the oil collecting nut oil channel, the main shaft oil channel, the main shaft oil groove and the bearing inner ring oil channel; during the test, the lubricating oil sprayed from the oil injection port at the lower end of the oil injection pipe enters the oil collecting chamber through the oil collecting nut oil inlet, the oil collecting nut oil channel, the main shaft oil channel, the main shaft oil groove and the bearing inner ring oil channel.

[0005] Furthermore, the oil collecting nut is also provided with a number of evenly distributed locking threaded holes and disassembly notches; the locking threaded holes are provided with locking screws and copper washers, and when the locking screws are tightened, the copper washers are pressed against the left end face of the inner ring of the test bearing to prevent the oil collecting nut from loosening when the main shaft stops rotating during the test; the copper washers prevent indentations from being left on the left end face of the inner ring of the test bearing; the disassembly notches are used to remove the oil collecting nut from the main shaft using tools after the test; the oil collecting nut oil passages are provided with eight, evenly distributed circular arc grooves; the total length of the circular arc grooves accounts for more than 66.7% of the circumference of the circle in which they are located; the width of the circular arc grooves is more than 1.5 mm; the number, total length, and width of the oil collecting nut oil passages are determined by experiments, and the oil collecting nut oil passages have a high oil collecting efficiency on the premise of ensuring the use strength of the oil collecting nut structure; the structural design of the oil collecting nut is a standard design on the high-speed bearing oil collecting efficiency test device, and this design is also recommended as a standard structure to high-speed bearing users as a design reference, and further structural design optimization space is reserved.

[0006] Furthermore, the clearance between the oil inlet of the oil collecting nut and the main shaft is greater than 4.0 mm, and this clearance value is determined by an experimental structure.

[0007] Furthermore, a thread is provided on the outer circumferential surface of the main shaft near the left end, and the oil collecting nut cooperates with the thread on the left end of the main shaft to fix the inner ring of the test bearing and the disassembly ring to the left end of the main shaft.

[0008] Furthermore, a sealing felt is provided between the oil collecting cylinder and the disassembly ring and the oil collecting nut; the sealing felt is used to seal the gap between the oil collecting cylinder and the disassembly ring and the oil collecting nut to prevent the leakage of lubricating oil during the test and the deviation of the experimental results.

[0009] Furthermore, the high-speed bearing oil collection efficiency test device also includes a measuring cup; an oil return nozzle is fixedly arranged at the lower part of the oil collection cylinder, and an oil return pipe is fixedly connected to the oil return nozzle, and the oil return pipe is connected to the measuring cup; the measuring cup is used to measure the volume of lubricating oil collected in the oil collection chamber.

[0010] Furthermore, the oil injection pipe is connected to an oil delivery device through an oil delivery pipeline, and a flow meter is provided on the oil delivery pipeline; the flow meter is used to measure the volume of lubricating oil output from the oil injection port.

[0011] The test method of the high-speed bearing oil collection efficiency test device includes the following test steps:

[0012] S1. Installation of the test bearing: Fix the inner ring of the test bearing, the oil collecting nut and the oil collecting cylinder on the left end of the main shaft; tighten the locking screw;

[0013] S2. Test speed and oil supply setting: according to the actual working speed range of the high-speed bearing, set several test speeds, and the speed difference between adjacent test speeds is 1000r / min; according to the actual working oil supply of the high-speed bearing, set the oil supply of the oil delivery device;

[0014] S3, start-up test: first start the spindle to rotate at the set speed, wait for the speed to stabilize, start the oil delivery device to start oil supply; start the test timer at the same time as the oil supply starts; the oil delivery device stops supplying oil after the set time, and the spindle continues to rotate at the set speed for the set time and then stops; after the spindle stops rotating, record the oil volume recorded by the flow meter and the oil volume collected by the measuring cup; repeat the above test process at several set test speeds, and record the oil volume recorded by the flow meter and the oil volume collected by the measuring cup at each set test speed;

[0015] S4. Calculation of oil collection efficiency: Calculate the oil collection efficiency based on the oil volume recorded by the flow meter at each set test speed and the oil volume collected by the measuring cup obtained from the test records; the oil collection efficiency calculation formula is: η=Q1 / Q2; where Q1 is the oil volume collected by the measuring cup, and Q2 is the oil volume recorded by the flow meter;

[0016] S5. Determination of oil recovery trend: Place several set test speeds and the corresponding oil recovery efficiencies in a rectangular coordinate system to obtain an oil recovery trend dot matrix diagram; Use fitting curves to sequentially connect the oil recovery trend dot matrix diagram to obtain an oil recovery trend curve diagram; Analyze the oil recovery trend curve diagram to determine whether the oil recovery efficiency of the high-speed bearing meets the design requirements.

[0017] Due to the adoption of the technical scheme as described above, the present invention discloses a high-speed bearing oil collection efficiency test device; comprising a main shaft, a disassembly ring, a test bearing inner ring, an oil collection nut, an oil collection cylinder, and an oil injection pipe; the main shaft is rotatably connected to the main shaft box through a bearing; the left end portion of the main shaft is fixedly provided with a disassembly ring, a test bearing inner ring, and an oil collection nut in sequence from right to left; the outer circumference of the disassembly ring, the test bearing inner ring, and the oil collection nut is fixedly provided with an oil collection cylinder, which is fixedly connected to the main shaft box by bolts, and the oil collection cylinder is fixedly provided with a main shaft box. The oil cylinder, the disassembly ring, the inner ring of the test bearing, and the outer circumference of the oil collecting nut form an oil collecting cavity; a gap is provided between the oil collecting cylinder, the disassembly ring, and the oil collecting nut; the oil collecting nut is provided with an oil collecting nut oil inlet and an oil collecting nut oil passage; an oil injection port is provided at the lower end of the oil injection pipe, and the oil injection port is aimed at the gap between the oil inlet of the oil collecting nut and the main shaft from the left side; the main shaft is provided with a main shaft oil passage and a main shaft oil groove near the left end face; the oil inlet of the oil collecting nut is connected to the oil collecting cavity through the oil collecting nut oil passage, the main shaft oil passage, the main shaft oil groove, the bearing inner ring oil passage, and the oil collecting cavity The oil collecting nut of the high-speed bearing oil collecting efficiency test device is experimentally designed. Under the condition that the structural strength of the oil collecting nut allows, the structural design of the oil collecting nut oil channel has a high oil collecting efficiency. The oil collecting nut is used as a standard part, so that the test results of the high-speed bearing oil collecting efficiency test device have a reference benchmark, which solves the problem of the high-speed bearing oil collecting efficiency test caused by the lack of standard high-speed bearing oil collecting efficiency test device and test method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of a high-speed bearing oil collection efficiency test device;

[0019] Figure 2 It is a schematic diagram of the enlarged part A;

[0020] Figure 3 This is the main view of the oil collecting nut;

[0021] Figure 4 This is a cross-sectional view of the oil collecting nut.

[0022] In the figure: 1. Spindle box; 2. Spindle; 2.1. Spindle oil channel; 2.2. Spindle oil groove; 3. Disassembly ring; 4. Test bearing inner ring; 4.1. Bearing inner ring oil channel; 5. Oil collecting nut; 5.1. Oil inlet of oil collecting nut; 5.2. Oil collecting nut oil channel; 5.3. Locking threaded hole; 5.3.1. Locking screw; 5.3.2. Copper gasket; 5.4. Disassembly and assembly notch; 6. Oil collecting cylinder; 7. Oil return nozzle; 8. Sealing felt; 9. Oil injection pipe; 9.1. Oil injection port; 10. Oil collecting chamber; 11. Oil return pipe; 12. Measuring cup; 13. Flow meter. DETAILED DESCRIPTION

[0023] The present invention can be explained in detail by the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0024] A high-speed bearing oil collection efficiency test device comprises a spindle box 1, a spindle 2, a disassembly ring 3, a test bearing inner ring 4, an oil collection nut 5, an oil collection cylinder 6, and an oil injection pipe 9; the spindle 2 is rotatably connected to the spindle box 1 through a bearing; the left end of the spindle 2 is fixedly provided with a disassembly ring 3, a test bearing inner ring 4, and an oil collection nut 5 in sequence from right to left; the outer circumference of the disassembly ring 3, the test bearing inner ring 4, and the oil collection nut 5 is fixedly provided with an oil collection cylinder 6, and the oil collection cylinder 6 is fixedly connected to the spindle box 1 through bolts, and the oil collection cylinder 6 surrounds the outer circumference of the disassembly ring 3, the test bearing inner ring 4, and the oil collection nut 5 An oil collecting chamber 10 is formed; a gap is provided between the oil collecting cylinder 6 and the disassembly ring 3 and the oil collecting nut 5; the oil collecting nut 5 is provided with an oil collecting nut oil inlet 5.1 and an oil collecting nut oil passage 5.2; an oil injection port 9.1 is provided at the lower end of the oil injection pipe 9, and the oil injection port 9.1 is aligned with the gap between the oil collecting nut oil inlet 5.1 and the main shaft 2 from the left side; the main shaft 2 is provided with a main shaft oil passage 2.1 and a main shaft oil groove 2.2 near the left end surface; the oil collecting nut oil inlet 5.1 is connected with the oil collecting chamber 10 through the oil collecting nut oil passage 5.2, the main shaft oil passage 2.1, the main shaft oil groove 2.2, and the bearing inner ring oil passage 4.1;

[0025] The oil collecting nut 5 is also provided with six evenly distributed locking threaded holes 5.3 and disassembly notches 5.4; the locking threaded holes 5.3 are provided with locking screws 5.3.1 and copper washers 5.3.2; the oil collecting nut oil passages 5.2 are provided with eight evenly distributed circular arc grooves, the total length of the circular arc grooves accounts for 66.7% of the circumference of the circle where they are located, and the width of the circular arc grooves is 1.5 mm;

[0026] The clearance between the oil inlet 5.1 of the oil collecting nut and the main shaft 2 is 4.0 mm;

[0027] The spindle 2 is provided with a thread on its outer circumferential surface near the left end, and the oil collecting nut 5 cooperates with the thread on the left end of the spindle 2 to fix the test bearing inner ring 4 and the disassembly ring 3 to the left end of the spindle 2;

[0028] A sealing felt 8 is provided between the oil collecting cylinder 6, the disassembly ring 3 and the oil collecting nut 5;

[0029] It also includes a measuring cup 12; an oil return nozzle 7 is fixedly provided at the lower part of the oil collecting cylinder 6, and an oil return pipe 11 is fixedly connected to the oil return nozzle 7, and the oil return pipe 11 is connected to the measuring cup 12;

[0030] The fuel injection pipe 9 is connected to an oil delivery device through an oil delivery pipeline, and a flow meter 13 is arranged on the oil delivery pipeline.

[0031] The test method of the high-speed bearing oil collection efficiency test device includes the following test steps:

[0032] S1. Installation of the test bearing: Fix the inner ring 4, oil collecting nut 5 and oil collecting cylinder 6 of the test bearing on the left end of the main shaft 2; tighten the locking screw 5.3.1;

[0033] S2. Test speed and oil supply setting: according to the actual working speed range of high-speed bearings (12000-17000 r / min), six test speeds are set, namely: 12000 r / min, 13000 r / min, 14000 r / min, 15000 r / min, 16000 r / min, 17000 r / min; the speed difference between adjacent test speeds is 1000 r / min; according to the actual working oil supply of high-speed bearings, the oil supply of the oil delivery device is set to 10L / min;

[0034] S3, start-up test: first start the main shaft 2 to rotate at a speed of 12000 r / min, and after the speed stabilizes, start the oil delivery device to start oil supply; start the test timer at the same time as the oil supply starts; the oil delivery device stops supplying oil after working for one minute, and the main shaft 2 continues to rotate at a speed of 12000 r / min for two minutes before stopping; after the main shaft 2 stops rotating, record the oil volume recorded by the flow meter 13 and the oil volume collected by the measuring cup 12; repeat the above test process at several other set test speeds, and record the oil volume recorded by the flow meter 13 and the oil volume collected by the measuring cup 12 at each set test speed;

[0035] S4. Calculation of oil collection efficiency: Calculate the oil collection efficiency based on the oil volume recorded by the flow meter 13 at each set test speed and the oil volume collected by the measuring cup 12 obtained from the test record; the oil collection efficiency calculation formula is: η=Q1 / Q2; wherein Q1 is the oil volume collected by the measuring cup 12, and Q2 is the oil volume recorded by the flow meter 13; according to the oil collection test record data of a certain model of high-speed bearing, the oil collection efficiency at the speed set between 12000-17000r / min is: 0.826, 0.831, 0.837, 0.848, 0.879 respectively;

[0036] S5. Determination of oil collection trend: six set test speeds and the corresponding oil collection efficiencies are set in a rectangular coordinate system to obtain an oil collection trend dot matrix diagram; the oil collection trend dot matrix diagram is sequentially connected with a fitting curve to obtain an oil collection trend curve diagram; the oil collection trend curve diagram of the high-speed bearing of this model is analyzed and judged, and its oil collection trend is that as the bearing speed increases, the oil collection efficiency also increases, and its oil collection efficiency at each set speed reaches the oil collection efficiency designed for the bearing, so it is determined that the oil collection efficiency of the high-speed bearing meets the design requirements.

[0037] Parts of the present invention not described in detail are prior art.

Claims

1. A high-speed bearing oil collection efficiency test device, characterized by: The invention comprises a main spindle box (1), a main spindle (2), a disassembly ring (3), a test bearing inner ring (4), an oil collecting nut (5), an oil collecting cylinder (6), and an oil injection pipe (9); the main spindle (2) is rotatably connected to the main spindle box (1) via a bearing; a disassembly ring (3), a test bearing inner ring (4), and an oil collecting nut (5) are fixedly arranged on the left end of the main spindle (2) in order from right to left; an oil collecting cylinder (6) is fixedly arranged on the outer circumference of the disassembly ring (3), the test bearing inner ring (4), and the oil collecting nut (5), and is fixedly connected to the main spindle box (1) via bolts; the oil collecting cylinder (6) and the outer circumference of the disassembly ring (3), the test bearing inner ring (4), and the oil collecting nut (5) form an oil collecting cavity (10). ; A gap is provided between the oil collecting cylinder (6) and the disassembly ring (3) and the oil collecting nut (5); the oil collecting nut (5) is provided with an oil collecting nut oil inlet (5.1) and an oil collecting nut oil passage (5.2); an oil injection port (9.1) is provided at the lower end of the oil injection pipe (9), and the oil injection port (9.1) is aligned with the gap between the oil collecting nut oil inlet (5.1) and the main shaft (2) from the left side; a main shaft oil passage (2.1) and a main shaft oil groove (2.2) are provided near the left end surface of the main shaft (2); the oil collecting nut oil inlet (5.1) is connected to the oil collecting chamber (10) through the oil collecting nut oil passage (5.2), the main shaft oil passage (2.1), the main shaft oil groove (2.2) and the bearing inner ring oil passage (4.1); It also includes a measuring cup (12); a return oil nozzle (7) is fixedly provided at the lower part of the oil collecting cylinder (6); an oil return pipe (11) is fixedly connected to the return oil nozzle (7); the return oil pipe (11) is connected to the measuring cup (12); the oil injection pipe (9) is connected to an oil delivery device via an oil delivery pipeline; a flow meter (13) is provided on the oil delivery pipeline.

2. The high-speed bearing oil collection efficiency test device according to claim 1 is characterized by: The oil collecting nut (5) is further provided with a plurality of evenly distributed locking threaded holes (5.3) and disassembly notches (5.4); a locking screw (5.3.1) and a copper washer (5.3.2) are arranged in the locking threaded hole (5.3); the oil collecting nut oil passage (5.2) is provided with a plurality of evenly distributed circular arc grooves, the total length of the circular arc grooves accounting for more than 66.7% of the circumference of the circle where the circular arc grooves are located; and the width of the circular arc grooves is more than 1.5 mm.

3. The high speed bearing oil collection efficiency test device according to claim 1 is characterized by: The clearance between the oil inlet port (5.1) of the oil collecting nut and the main shaft (2) is greater than 4.0 mm.

4. The high-speed bearing oil collection efficiency test device according to claim 1 is characterized by: The spindle (2) is provided with a thread on its outer circumferential surface near the left end, and the oil collecting nut (5) cooperates with the thread on the left end of the spindle (2) to fix the test bearing inner ring (4) and the disassembly ring (3) to the left end of the spindle (2).

5. The high-speed bearing oil collection efficiency test device according to claim 1 is characterized by: A sealing felt (8) is provided between the oil collecting cylinder (6), the disassembly ring (3) and the oil collecting nut (5).

6. The test method of the high-speed bearing oil collection efficiency test device according to claim 2 is characterized by: The test steps include: S1. Installation of the test bearing: Fix the inner ring (4), oil collecting nut (5) and oil collecting cylinder (6) of the test bearing to the left end of the main shaft (2); tighten the locking screw (5.3.1); S2. Test speed and oil supply setting: according to the actual working speed range of the high-speed bearing, set several test speeds, and the speed difference between adjacent test speeds is 1000r / min; according to the actual working oil supply of the high-speed bearing, set the oil supply of the oil delivery device; S3, start-up test: first, start the main shaft (2) to rotate at a set speed, and after the speed stabilizes, start the oil delivery device to start supplying oil; start the test timer at the same time as the oil supply starts; after the oil delivery device works for a set time, stop supplying oil, and the main shaft (2) continues to rotate at a set speed for a set time and then stops rotating; after the main shaft (2) stops rotating, record the amount of oil recorded by the flow meter (13) and the amount of oil collected by the measuring cup (12); repeat the above test process at a set number of test speeds, and record the amount of oil recorded by the flow meter (13) and the amount of oil collected by the measuring cup (12) at each set test speed; S4. Calculation of oil collection efficiency: Calculate the oil collection efficiency based on the oil volume recorded by the flow meter (13) at each set test speed and the oil volume collected by the measuring cup (12) obtained from the test record. The oil collection efficiency calculation formula is: η=Q1 / Q2; wherein Q1 is the oil volume collected by the measuring cup (12), and Q2 is the oil volume recorded by the flow meter (13); S5. Determine the oil recovery trend: set a number of set test speeds and the corresponding oil recovery efficiencies in a rectangular coordinate system to obtain an oil recovery trend dot matrix diagram; connect the oil recovery trend dot matrix diagrams in sequence with fitting curves to obtain an oil recovery trend curve diagram; Analyze the oil collection trend curve to determine whether the oil collection efficiency of the high-speed bearing meets the design requirements.

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