Method for measuring deflection torque of flange ball bearing

Abstract

The invention discloses a flange ball bearing deflection torque measuring method, and relates to a deflection torque measuring method. The invention aims to solve the problem that the deflection torque cannot be detected because no corresponding detection equipment exists in the prior art. According to the method, the deflection torque of the flange ball bearing can be rapidly and accurately measured according to the structural characteristics of the flange ball bearing, the measurement stability meets the measurement requirement, the problem that the deflection torque of an existing flange ball bearing does not have a measurement method can be solved, and the machining quality of the bearing is improved. The invention belongs to the technical field of flange ball bearing deflection torque measurement.

Description

Technical Field

[0001] The invention relates to a flange ball bearing measurement method, in particular to a flange ball bearing deflection torque measurement method, and belongs to the flange ball bearing deflection torque measurement technical field. Background Art

[0002] The working conditions of aviation bearings are complex and harsh. The working conditions of high temperature, high speed and high load have higher and higher requirements on the quality of bearings. The qualified diameter of the deflection torque affects the performance of the bearing. There are strict regulations in the processing and testing process, and users will also put forward strict requirements according to the use situation.

[0003] The outer ring of a certain type of flange ball bearing has a drum-shaped outer surface, which can cooperate with the spherical inner hole of the flange inner hole to form a contact self-aligning structure. At present, this type of flange ball bearing has restrictions on the allowable deflection angle [β] and the allowable deflection torque during design. The allowable deflection angle [β] is a certain value, that is, the relative deflection angle between the inner ring and the flange allowed during the operation of the bearing; the allowable deflection torque is a certain range of values, that is, deflection is allowed between the inner ring of the bearing and the flange within this range to ensure that the finished bearing can run stably. The range of the deflection torque can be calculated through the allowable deflection angle [β].

[0004] However, in the detection of flange ball bearings, the deflection torque cannot be detected due to the lack of corresponding detection equipment. In order to improve the performance of bearings, the current manufacturing process has made clear requirements for the measurement of deflection torque, and it is imperative to solve the detection of deflection torque of flange ball bearings.

[0005] In summary, how to propose a measurement method for the above technical problems has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention provides a method for measuring the deflection torque of a flange ball bearing.

[0007] The technical solution of the present invention is: a flange ball bearing deflection torque measurement method, the tooling used includes a test mandrel, a bearing mounting seat and a measurement platform.

[0008] The bearing mounting seat includes an integral base and a base plate, the base and the base plate are arranged vertically, a through hole is opened on the base plate, and the base is fixedly connected to the measuring platform; the flange of the test bearing is fixed on the base plate, and the test spindle is inserted into the inner ring of the test bearing.

[0009] Furthermore, the method is specifically carried out according to the following steps:

[0010] Step 1: Fix the base to the measuring platform;

[0011] Step 2: Fix the flange of the test bearing on one side of the base plate;

[0012] Step 3: One end of the test mandrel is coaxially inserted into the inner ring of the test bearing, the test mandrel passes through the through hole of the base plate, and the other end of the test mandrel is connected to the tension mechanism;

[0013] Step 4: Install a displacement measuring mechanism on the measuring platform, with the probe of the displacement measuring mechanism abutting against the end face of the outer ring of the test bearing;

[0014] Step 5: Record the distance L between the axis of the displacement measuring mechanism probe and the axis of the test mandrel;

[0015] Step 6: Use the tension mechanism to apply a force greater than P to the test mandrel min The tensile load is applied vertically upwards to the horizontal plane, causing deflection between the inner ring of the test bearing and the flange. At the same time, the displacement value L' of the displacement measuring mechanism is observed. The tensile load is applied gradually in batches.

[0016] P min : The minimum load when deflection occurs between the inner ring and the flange;

[0017] Step 7: Calculate the actual deflection angle β′ of the test bearing through L and L′;

[0018]

[0019] Where:

[0020] β′: actual deflection angle of the tested bearing;

[0021] L′: displacement value of the displacement measuring mechanism;

[0022] L: The distance between the axis of the measuring mechanism probe and the axis of the test mandrel;

[0023] Step 8: Compare the actual deflection angle β′ with the allowable deflection angle [β];

[0024] If β′<[β], the tension mechanism continues to apply the tensile load to the test mandrel;

[0025] When β′=[β], the tension mechanism stops loading, and the load value P of the tension mechanism at this time is observed;

[0026] Step 9. Calculate the actual deflection moment M of the test bearing kp ;

[0027]

[0028] Where:

[0029] Mkp : Test the actual deflection moment of the bearing;

[0030] P: When β′=[β], observe the load value of the tension mechanism;

[0031] L: The distance between the axis of the measuring mechanism probe and the axis of the test mandrel;

[0032] m: the mass of the test mandrel;

[0033] g: gravity coefficient, g = 9.8N / kg.

[0034] Compared with the prior art, the present invention has the following effects:

[0035] 1. The present invention can measure the deflection torque of the flange ball bearing quickly and accurately according to the structural characteristics of the flange ball bearing, and the measurement stability meets the measurement requirements. It can solve the problem that there is no measurement method for the deflection torque of the existing flange ball bearing, and improve the processing quality of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the tooling used in the present invention;

[0037] Figure 2 is a side view of the bearing mounting seat 3 of the present invention;

[0038] Figure 3 It is a schematic diagram of the tensile mechanism 1 of the present invention loading the test mandrel 2;

[0039] Figure 4 It is a schematic diagram of the present invention when measuring the deflection torque.

[0040] In the figure: 1. Tension mechanism; 2. Test mandrel; 2-1. Bearing cover; 3. Bearing mounting seat; 3-1. Base; 3-2. Base plate; 5. Test bearing; 6. Spiral test frame; 7. Tension gauge; 8. Measuring platform; 9. Displacement measuring mechanism. DETAILED DESCRIPTION

[0041] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0042] Specific implementation method 1: Combination Figures 1 to 4 The present embodiment is described as a flange ball bearing deflection torque measurement method, and the tooling used includes a test spindle 2, a bearing mounting seat 3 and a measurement platform 8.

[0043] The bearing mounting seat 3 includes a base 3 - 1 and a base plate 3 - 2 which are integrally arranged. The base 3 - 1 and the base plate 3 - 2 are arranged vertically. A through hole is opened on the base plate 3 - 2. The base 3 - 1 is fixedly connected to the measuring platform 8 .

[0044] The flange of the test bearing 5 is fixed on the base plate 3 - 2 , and the test mandrel 2 is inserted into the inner ring of the test bearing 5 .

[0045] Further: the method is specifically carried out according to the following steps:

[0046] Step 1: Fix the base 3-1 to the measuring platform 8;

[0047] Step 2: Fix the flange of the test bearing 5 on one side of the base plate 3-2;

[0048] Step 3: One end of the test mandrel 2 is coaxially inserted into the inner ring of the test bearing 5, the test mandrel 2 passes through the through hole of the base plate 3-2, and the other end of the test mandrel 2 is connected to the tension mechanism 1;

[0049] Step 4: Install the displacement measuring mechanism 9 on the measuring platform 8, and place the probe of the displacement measuring mechanism 9 against the end face of the outer ring of the test bearing 5;

[0050] Step 5, recording the distance L between the axis of the probe of the displacement measuring mechanism 9 and the axis of the test mandrel 2;

[0051] Step 6: Use the tension mechanism 1 to apply a force greater than P to the test mandrel 2 min A tensile load is applied vertically upward to the horizontal plane, so that the inner ring of the test bearing 5 and the flange are deflected, and the displacement value L' of the displacement measuring mechanism 9 is observed at the same time. The tensile load is applied in batches and gradually;

[0052] P min : The minimum load when deflection occurs between the inner ring and the flange;

[0053] Step 7: After the inner ring of the test bearing 5 and the flange are deflected, the swing trajectory of the outer ring is an arc. Therefore, the swing trajectory of the outer ring of the test bearing 5 before and after the deflection satisfies the fan chord length formula; however, in practice, since the actual deflection angle β′ is very small, the length of the arc can be approximately equal to a straight line (such as Figure 4 As shown), the length of the straight line is the displacement value L' of the displacement measuring mechanism 9, and the actual deflection angle β' of the test bearing 5 is calculated by L and L';

[0054]

[0055] Where:

[0056] β′: actual deflection angle of the test bearing 5;

[0057] L′: displacement value of the displacement measuring mechanism 9;

[0058] L: the distance between the axis of the probe of the measuring mechanism 9 and the axis of the test spindle 2;

[0059] Step 8: Compare the actual deflection angle β′ with the allowable deflection angle [β];

[0060] If β′<[β], the tension mechanism 1 continues to apply the tension load to the test mandrel 2;

[0061] When β′=[β], the tension mechanism 1 stops loading, and the load value P of the tension mechanism 1 at this time is observed;

[0062] Step 9. Since one end of the test mandrel 2 is coaxially inserted on the inner ring of the test bearing 5, the deflection moment of the test bearing 5 is: the torque generated by the tensile load minus the torque generated by the deadweight of the other end of the test mandrel 2 (i.e., the connection end between the tensile mechanism 1 and the test mandrel 2), and the actual deflection moment M of the test bearing 5 is obtained. kp ;

[0063]

[0064] Where:

[0065] M kp : Test the actual deflection moment of bearing 5;

[0066] P: When β′=[β], observe the load value of the tension mechanism 1;

[0067] L: the distance between the axis of the probe of the measuring mechanism 9 and the axis of the test spindle 2;

[0068] m: the mass of the test mandrel 2;

[0069] g: gravity coefficient, g = 9.8N / kg.

[0070] Specific implementation method 2: Combination Figure 1 To illustrate this embodiment, in step 1 of this embodiment, the base 3-1 is connected to the measuring platform 8 by bolts. Other components and connection relationships are the same as those in the specific embodiment 1.

[0071] Specific implementation method three: Combination Figure 1 To explain this embodiment, the test spindle 2 of this embodiment includes a first shaft body, a shaft ring and a second shaft body. The first shaft body is coaxially inserted on the inner ring of the test bearing 5, and the end of the second shaft body is connected to the tension mechanism 1.

[0072] Furthermore, it also includes a bearing cover 2-1, which is installed on the end face of the first shaft body by screws, and the two end faces of the inner ring of the test bearing 5 are respectively against the bearing cover 2-1 and the shaft ring.

[0073] Other components and connection relationships are the same as those in the first or second specific implementation.

[0074] Specific implementation method four: Combination Figure 1 To explain this embodiment, the tension mechanism 1 of this embodiment includes a spiral test frame 6 and a tension gauge 7 , and two ends of the tension gauge 7 are connected to the spiral test frame 6 and the second shaft body of the test mandrel 2 respectively.

[0075] The other components and connection relationships are the same as those of the first, second or third specific implementation modes.

[0076] Specific implementation method five: Combination Figure 1 To illustrate this embodiment, in step 4 of this embodiment, the displacement measuring mechanism 9 includes a magnetic frame and a displacement measuring piece, the probe of the displacement measuring piece is against the end face of the outer ring of the test bearing 5; the displacement measuring piece is supported on the measuring platform 8 by the magnetic frame.

[0077] Furthermore, the displacement measuring component is a displacement sensor or a micrometer.

[0078] The other components and connection relationships are the same as those of the first, second, third or fourth specific implementation modes.

[0079] The present invention has been disclosed as above in the form of a preferred embodiment, but it is not intended to limit the present invention. Any simple modification, equivalent changes and modifications made to the above implementation cases by any professional and technical personnel who do not deviate from the content of the technical solution of the present invention and based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for measuring the deflection torque of a flange ball bearing, wherein the tooling used comprises a test mandrel (2), a bearing mounting seat (3) and a measuring platform (8); The bearing mounting seat (3) comprises a base (3-1) and a base plate (3-2) which are integrally arranged, the base (3-1) and the base plate (3-2) being arranged vertically, a through hole being formed on the base plate (3-2), and the base (3-1) being fixedly connected to a measuring platform (8); The flange of the test bearing (5) is fixed on the base plate (3-2), and the test mandrel (2) is inserted into the inner ring of the test bearing (5); Features: The method is specifically carried out in the following steps: Step 1: Fix the base (3-1) and the measuring platform (8); Step 2: Fix the flange of the test bearing (5) on one side of the base plate (3-2); Step 3: One end of the test mandrel (2) is coaxially inserted into the inner ring of the test bearing (5), the test mandrel (2) passes through the through hole of the base plate (3-2), and the other end of the test mandrel (2) is connected to the tension mechanism (1); Step 4: Install a displacement measuring mechanism (9) on the measuring platform (8), wherein the probe of the displacement measuring mechanism (9) abuts against the end face of the outer ring of the test bearing (5); Step 5, recording the distance L between the axis of the probe of the displacement measuring mechanism (9) and the axis of the test mandrel (2); Step 6: Use the tension mechanism (1) to apply a force greater than P to the test mandrel (2). min A tensile load is applied vertically upwards to the horizontal plane, causing a deflection between the inner ring of the test bearing (5) and the flange, while observing the displacement value L' of the displacement measuring mechanism (9), and the tensile load is applied in stages and gradually; P min : The minimum load when deflection occurs between the inner ring and the flange; Step 7, using L and L', calculate the actual deflection angle β' of the test bearing (5); Where: β′: actual deflection angle of the test bearing (5); L′: displacement value of the displacement measuring mechanism (9); L: distance between the axis of the probe of the measuring mechanism (9) and the axis of the test mandrel (2); Step 8: Compare the actual deflection angle β′ with the allowable deflection angle [β]; If β′<[β], the tension mechanism (1) continues to apply the tension load to the test mandrel (2); When β′=[β], the tension mechanism (1) stops loading, and the load value P of the tension mechanism (1) at this time is observed; Step 9: Calculate the actual deflection moment M of the test bearing (5) kp ; Where: M kp : Actual deflection moment of the test bearing (5); P: when β′=[β], observe the load value of the tension mechanism (1); L: distance between the axis of the probe of the measuring mechanism (9) and the axis of the test mandrel (2); m: mass of the test mandrel (2); g: gravity coefficient, g = 9.8N / kg.

2. A flange ball bearing deflection torque measurement method according to claim 1, characterized in that: In the step 1, the base (3-1) and the measuring platform (8) are connected via bolts.

3. The method for measuring the deflection torque of a flange ball bearing according to claim 1, characterized in that: The test mandrel (2) comprises a first shaft body, a shaft ring and a second shaft body, the first shaft body is coaxially inserted on the inner ring of the test bearing (5), and the end of the second shaft body is connected to the tension mechanism (1).

4. A flange ball bearing deflection torque measurement method according to claim 1, characterized in that: The tension mechanism (1) comprises a spiral test frame (6) and a tension gauge (7), and two ends of the tension gauge (7) are respectively connected to the spiral test frame (6) and the second shaft body of the test mandrel (2).

5. The method for measuring the deflection torque of a flange ball bearing according to claim 1, characterized in that: It also includes a bearing cover (2-1), which is mounted on the end face of the first shaft body by means of screws, and the two end faces of the inner ring of the test bearing (5) are respectively against the bearing cover (2-1) and the shaft ring.

6. A flange ball bearing deflection torque measurement method according to claim 1, characterized in that: In step 4, the displacement measuring mechanism (9) comprises a magnetic frame and a displacement measuring piece, wherein the probe of the displacement measuring piece abuts against the end face of the outer ring of the test bearing (5); and the displacement measuring piece is supported on the measuring platform (8) by the magnetic frame.

7. A flange ball bearing deflection torque measurement method according to claim 1, characterized in that: The displacement measuring component in step 4 is a displacement sensor or a micrometer.

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