A method for measuring the deflection torque of a flange ball bearing

Abstract

The application discloses a kind of flange plate ball bearing deflection torque measurement method, it relates to a kind of deflection torque measurement method.The present application is to solve the problem that the deflection torque in the prior art has no corresponding detection equipment, and further cannot be detected.The present application can be aimed at the structural characteristics of flange plate ball bearing, and the deflection torque is measured quickly and accurately, and the measurement stability meets the measurement requirement, can solve the problem that the deflection torque of existing flange plate ball bearing has no measurement method, and plays the role of improving the processing quality of bearing.The present application belongs to the technical field of flange plate ball bearing deflection torque measurement.

Description

Technical Field

[0001] This invention relates to a method for measuring flange ball bearings, specifically a method for measuring the deflection torque of flange ball bearings, belonging to the technical field of flange ball bearing deflection torque measurement. Background Technology

[0002] Aerospace bearings operate under complex and demanding conditions. High temperatures, high speeds, and high loads place increasingly stringent quality requirements on bearings. The quality of the deflection torque directly impacts bearing performance, and strict regulations govern the machining and testing processes. Users also impose stringent requirements based on their specific application requirements.

[0003] A certain type of flange ball bearing has a drum-shaped outer ring that can mate with the spherical inner bore of the flange to form a self-aligning contact structure. Currently, the design of this type of flange ball bearing has limitations on the allowable deflection angle [β] and allowable deflection torque. The allowable deflection angle [β] is a specific value, that is, the relative deflection angle between the inner ring and the flange that the bearing is allowed to rotate during operation. The allowable deflection torque is a range of values, that is, within this range, the bearing inner ring is allowed to deflect between the bearing and the flange to ensure that the finished bearing can operate stably. The range of deflection torque values ​​can be calculated from the allowable deflection angle [β].

[0004] However, in the inspection of flanged ball bearings, the deflection torque cannot be measured due to the lack of corresponding testing equipment. To improve bearing performance, current manufacturing processes have clearly defined requirements for the measurement of deflection torque, making it imperative to solve the problem of detecting the deflection torque of flanged ball bearings.

[0005] In summary, how to propose a measurement method to address the aforementioned technical problems has become a pressing issue for those skilled in the art. Summary of the Invention

[0006] To address the shortcomings of the prior art, this invention provides a method for measuring the deflection torque of a flange ball bearing.

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

[0008] The bearing mounting base includes an integrally formed base and a base plate. The base and the base plate are arranged perpendicularly. The base plate has through holes and is fixedly connected to the measurement platform. The flange of the test bearing is fixed on the base plate, and the test mandrel 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: Secure the base to the measuring platform;

[0011] Step 2: Fix the flange of the test bearing to 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 substrate, and the other end of the test mandrel is connected to the tension mechanism.

[0013] Step 4: Install the 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 Six: Apply a force greater than P to the test mandrel using a tension mechanism. min A tensile load is applied, perpendicular to the horizontal plane and upward, to cause the inner ring of the test bearing to deflect between itself and the flange. At the same time, the displacement value L′ of the displacement measuring mechanism is observed. The tensile load is applied in stages and gradually.

[0016] P min The minimum load required for deflection between the inner ring and the flange;

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

[0018]

[0019] In the formula:

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

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

[0022] L: The distance between the axis of the probe of the displacement measuring mechanism 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 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 torque M of the test bearing. kp ;

[0027]

[0028] In the formula:

[0029] Mkp : Test the actual deflection torque 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 probe of the displacement measuring mechanism and the axis of the test mandrel;

[0032] m: Quality of the test mandrel;

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

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

[0035] 1. This invention can quickly and accurately measure the deflection torque of flange ball bearings, taking into account their structural characteristics, and the measurement stability meets the measurement requirements. It can solve the problem of the lack of existing methods for measuring the deflection torque of flange ball bearings, and improve the processing quality of bearings. Attached Figure Description

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

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

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

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

[0040] In the diagram: 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. Measurement platform; 9. Displacement measurement mechanism. Detailed Implementation

[0041] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments.

[0042] Specific implementation method one: Combining Figures 1 to 4 This embodiment describes a method for measuring the deflection torque of a flange ball bearing. The tooling used includes a test mandrel 2, a bearing mounting base 3, and a measuring platform 8.

[0043] The bearing mounting base 3 includes an integrally formed base 3-1 and a base plate 3-2. The base 3-1 and the base plate 3-2 are arranged perpendicularly. The base plate 3-2 has a through hole. 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] Furthermore, the method is specifically carried out according to the following steps:

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

[0047] Step 2: Fix the flange of the test bearing 5 to 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 substrate 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, with the probe of the displacement measuring mechanism 9 abutting against the end face of the outer ring of the test bearing 5;

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

[0051] Step 6: Apply a force greater than P to the test mandrel 2 using tension mechanism 1. min The tensile load is applied vertically upwards to the horizontal plane, causing the inner ring of the test bearing 5 to deflect between itself and the flange. At the same time, the displacement value L′ of the displacement measuring mechanism 9 is observed. The tensile load is applied in stages and gradually.

[0052] P min The minimum load required for deflection between the inner ring and the flange;

[0053] Step 7: After the inner ring of bearing 5 deflects between itself and the flange, the trajectory of the outer ring's swing is an arc. Therefore, the trajectory of bearing 5 before deflection, after deflection, and the trajectory of the outer ring's swing satisfy the sector chord length formula. However, in reality, because the actual deflection angle β′ is very small, the length of the arc can be approximately equal to a straight line (e.g., ...). Figure 4 As shown), the length of the straight line is the displacement value L′ of the displacement measuring mechanism 9. The actual deflection angle β′ of the test bearing 5 is obtained through L and L′.

[0054]

[0055] In the formula:

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

[0057] L′: Displacement value of 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 mandrel 2;

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

[0060] If β′<[β], then the tension mechanism 1 continues to apply a tensile 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 into the inner ring of the test bearing 5, the deflection torque of the test bearing 5 is: the torque generated by the tensile load minus the torque generated by the self-weight of the other end of the test mandrel 2 (i.e., the connection end between the tensile mechanism 1 and the test mandrel 2), to calculate the actual deflection torque M of the test bearing 5. kp ;

[0063]

[0064] In the formula:

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

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

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

[0068] m: Mass of test mandrel 2;

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

[0070] Specific Implementation Method Two: Combining Figure 1 In this embodiment, the base 3-1 and the measuring platform 8 are connected by bolts in step one. Other components and connections are the same as in specific embodiment one.

[0071] Specific implementation method three: Combining Figure 1 This embodiment describes a test mandrel 2 comprising a first shaft, a collar, and a second shaft. The first shaft is coaxially inserted into the inner ring of the test bearing 5, and the end of the second shaft is connected to the tension mechanism 1.

[0072] Furthermore, it also includes a bearing cap 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 abut against the bearing cap 2-1 and the shaft collar respectively.

[0073] The other components and connections are the same as in specific implementation method one or two.

[0074] Specific implementation method four: Combination Figure 1 This embodiment describes a tension mechanism 1 that includes a spiral testing frame 6 and a tension gauge 7. The two ends of the tension gauge 7 are respectively connected to the spiral testing frame 6 and the second shaft of the testing mandrel 2.

[0075] The other components and connections are the same as those in specific implementation methods one, two, or three.

[0076] Specific Implementation Method Five: Combining Figure 1 In this embodiment, the displacement measuring mechanism 9 in step four includes a magnetic frame and a displacement measuring component. The probe of the displacement measuring component abuts against the end face of the outer ring of the test bearing 5. The displacement measuring component is supported on the measuring platform 8 by the magnetic frame.

[0077] Furthermore, the displacement measuring device is a displacement sensor or a dial indicator.

[0078] The other components and connections are the same as those in specific implementation methods one, two, three, or four.

[0079] The present invention has been disclosed above with reference to preferred embodiments, but it is not intended to limit the present invention. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for measuring deflection torque of a flange plate ball bearing, wherein a tool used in the method comprises a test spindle (2), a bearing mounting base (3) and a measuring platform (8); the bearing mounting base (3) comprises a base (3-1) and a base plate (3-2) which are arranged perpendicularly, the base plate (3-2) is provided with a through hole, and the base (3-1) is fixed to the measuring platform (8); a flange plate of a test bearing (5) is fixed to the base plate (3-2), and the test spindle (2) is inserted into an inner ring of the test bearing (5); the method is performed according to the following steps: Step 1: fixing the base (3-1) to the measuring platform (8); Step 2: fixing the flange plate of the test bearing (5) to one side of the base plate (3-2); Step 3: coaxially inserting one end of the test spindle (2) into the inner ring of the test bearing (5), passing the test spindle (2) through the through hole of the base plate (3-2), and connecting the other end of the test spindle (2) to a tension mechanism (1); Step 4: installing a displacement measuring mechanism (9) on the measuring platform (8), and abutting a measuring head of the displacement measuring mechanism (9) to an end face of an outer ring of the test bearing (5); Step 5: recording a distance L between an axis of the measuring head of the displacement measuring mechanism (9) and an axis of the test spindle (2); Step 6: connecting the test spindle (2) to the tension mechanism (1); Step 7: calculating an actual deflection angle β' of the test bearing (5) according to L and L'; and Step 8: comparing the actual deflection angle β' with a permissible deflection angle [β], wherein if β' < [β], the tension mechanism (1) continues to apply a tension load to the test spindle (2); if β' = [β], the tension mechanism (1) stops loading, and a load value P of the tension mechanism (1) at this time is observed; and if β' > [β], the test bearing (5) is replaced with a new one, and the above steps are repeated. In the formula, β' is the actual deflection angle of the test bearing (5), L' is a displacement value of the displacement measuring mechanism (9), L is the distance between the axis of the measuring head of the displacement measuring mechanism (9) and the axis of the test spindle (2), P is the load value of the tension mechanism (1) when β' = [β], m is a mass of the test spindle (2), and g is a gravity coefficient, g = 9.8 N / kg. In Step 1, the base (3-1) is connected to the measuring platform (8) by bolts. The test spindle (2) comprises a first shaft body, a shaft ring and a second shaft body, the first shaft body is coaxially inserted into the inner ring of the test bearing (5), and the second shaft body is connected to the tension mechanism (1). characterized in that The tension mechanism (1) comprises a screw test frame (6) and a tension gauge (7), and the two ends of the tension gauge (7) are respectively connected to the screw test frame (6) and the second shaft body of the test spindle (2). The method further comprises a bearing gland (2-1) which is installed on an end face of the first shaft body by a screw, and the two end faces of the inner ring of the test bearing (5) are respectively abutted to the bearing gland (2-1) and the shaft ring. ​ ​ ​ ​ Step six, apply a tensile load greater than P min to the test mandrel (2) with the tensile mechanism (1), the tensile load being perpendicular to the horizontal plane and upwards, causing 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), the tensile load being applied in several steps and gradually; P min : the minimum load when the inner ring is deflected between the flanges ​ ​ ​ ​ ​ ​ ​ ​ Step nine, find the actual deflection moment M of the test bearing (5) kp ; ​ M kp : actual deflection torque of the bearing (5); ​ ​ ​ ​ 2. The method of claim 1, wherein: ​ 3. The method of claim 1, wherein: ​ 4. The method of claim 1, wherein: ​ 5. The method of claim 1, wherein: ​ 6. The method of claim 1, wherein: The displacement measuring mechanism (9) in the fourth step comprises a magnetic support and a displacement measuring element, the measuring head of the displacement measuring element abutting against the end face of the outer ring of the test bearing (5); the displacement measuring element is supported on the measuring platform (8) by the magnetic support.

7. The method of claim 1, wherein: The displacement measuring mechanism in the fourth step is a displacement sensor or a micrometer.

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