阅读说明：本技术 轴承保持架相对内环的跳动测量工具及其测量方法 (Tool and method for measuring runout of bearing retainer relative to inner ring ) 是由 范明争 胡一廷 潘非 涂卫强 于 2020-06-28 设计创作，主要内容包括：本发明提供了一种轴承保持架相对内环的跳动测量工具及其测量方法,所述跳动测量工具包括支座、表架、千分表和双测量头,表架固定在支座的一侧的上端面上,千分表安装在表架上,位于支座的上方,且千分表的表头固定在表架上,沿水平向外延伸；双测量头可转动地连接在表架的外端部,使得双测量头的上测量头与千分表的表头接触；支座的形状与待测轴承的内环内孔相互配合,当支座安装至待测轴承的内环内孔时,双测量头的下测量头与待测轴承的保持架待测圆柱面接触。本发明直接利用轴承内环的内孔放置测量架,再根据杠杆原理,实现轴承保持架相对于内环的跳动测量,其结构简单,架表便捷,操作简单,能够缩短测量时间,而且生产成本低。(The invention provides a runout measuring tool of a bearing retainer relative to an inner ring and a measuring method thereof, wherein the runout measuring tool comprises a support, a gauge stand, a dial gauge and a double measuring head, the gauge stand is fixed on the upper end surface of one side of the support, the dial gauge is arranged on the gauge stand and positioned above the support, and the gauge head of the dial gauge is fixed on the gauge stand and extends outwards along the horizontal direction; the double measuring heads are rotatably connected to the outer end part of the dial gauge frame, so that the upper measuring heads of the double measuring heads are in contact with the dial gauge heads of the dial gauge; the shape of the support is matched with the inner ring inner hole of the bearing to be measured, and when the support is installed to the inner ring inner hole of the bearing to be measured, the lower measuring heads of the double measuring heads are in contact with the cylindrical surface to be measured of the retainer of the bearing to be measured. The invention directly utilizes the inner hole of the bearing inner ring to place the measuring frame, and then realizes the jump measurement of the bearing retainer relative to the inner ring according to the lever principle.)

1. The tool for measuring the runout of the bearing retainer relative to the inner ring is characterized by comprising a support, a dial gauge stand, a dial gauge and a double-measuring head, wherein the dial gauge stand is fixed on the upper end surface of one side of the support, the dial gauge is installed on the dial gauge stand and positioned above the support, and a gauge head of the dial gauge is fixed on the dial gauge stand and extends outwards along the horizontal direction;

the double measuring heads are rotatably connected to the outer end part of the dial gauge frame, so that the upper measuring heads of the double measuring heads are in contact with the dial gauge heads of the dial gauge;

the shape of the support is matched with the inner ring inner hole of the bearing to be measured, and when the support is installed to the inner ring inner hole of the bearing to be measured, the lower measuring heads of the double measuring heads are in contact with the cylindrical surface to be measured of the retainer of the bearing to be measured.

2. The tool of claim 1, wherein the gauge stand includes a first mounting portion fixed to the upper end surface of the support and a second mounting portion connected to an outer end of the first mounting portion and located outside the support.

3. The tool for measuring the run-out of the bearing retainer relative to the inner ring as claimed in claim 2, wherein the dial indicator is fixed on the first mounting portion, the second mounting portion is L-shaped, a gauge head of the dial indicator is fixed on the upper end portion of the second mounting portion, the double measuring heads are fixed on the outer end portion of the second mounting portion, and the upper end portion and the outer end portion are perpendicular to each other.

4. The tool for measuring the run-out of the bearing retainer relative to the inner ring as claimed in claim 3, wherein a first mounting groove is formed in the upper end of the second mounting portion, a gauge head of the dial gauge is arranged in the first mounting groove in a penetrating mode, and the gauge head of the dial gauge is clamped through a positioning piece.

5. The tool of claim 3, wherein the second mounting portion has a second mounting slot formed at an outer end thereof, and the dual gauge head is rotatably mounted in the second mounting slot.

6. The tool of claim 1, wherein the support is a notched stepped cylindrical structure, and the gauge stand and the dual gauge head are located in notched sections of the support.

7. The tool of claim 2, wherein the support comprises a mounting base and a positioning base, the positioning base is connected to the mounting base, and an outer edge of the positioning base protrudes beyond an outer edge of the mounting base to form a step.

8. The tool for measuring the run-out of a bearing retainer relative to an inner ring of claim 5, wherein the fixing seat is in clearance fit with an inner ring inner hole of the bearing to be measured, so that the support seat is quickly centered with the inner ring of the bearing to be measured.

9. A method of measuring run-out of a bearing cage relative to an inner ring, the method using the run-out measuring tool of any one of claims 1 to 8, the method comprising:

S₁placing the assembled jump measuring tool of the bearing retainer relative to the inner ring on the inner ring of the bearing to be measured, and adjusting the positions of the dial indicator and the double measuring heads to enable the lower measuring heads of the double measuring heads to be in contact with the surface to be measured of the retainer of the bearing to be measured;

S₂resetting the dial indicator;

S₃manually pressing the support, simultaneously rotating a retainer of the bearing to be tested to rotate for a circle along the inner ring of the bearing to be tested, and measuring the bounce value of the retainer relative to the inner ring of the bearing to be tested;

S₄and if the jumping value exceeds the specified value, the bearing to be tested is unqualified in assembly.

10. The method according to claim 9, wherein the support of the runout measuring tool comprises a fixing base and a positioning base, the positioning base is connected to the fixing base, an outer edge of the positioning base protrudes from an outer edge of the fixing base to form a step, and a bottom surface of the step of the positioning base is attached to an upper end surface of the inner ring of the bearing to be measured.

Technical Field

The invention relates to the field of engine assembly, in particular to a tool and a method for measuring the runout of a bearing retainer relative to an inner ring.

Background

In the prior art, a bearing is an important component of an aircraft engine rotor, and the assembly quality of the bearing directly influences the operation safety of the aircraft engine.

Fig. 1 is a schematic structural diagram of a roller bearing commonly used in an aircraft engine in the prior art.

As shown in fig. 1, the engine bearing is composed of rolling elements 10, a cage 20, and an inner ring 30, and the rolling elements 10, the cage 20, and the inner ring 30 are assembled into a single body by a shrink fit method, and the cage 20 and the rolling elements 30 are rotatable with respect to the inner ring after assembly. In order to check the quality of the assembly of the bearing, the runout value of the cage 20 with respect to the inner ring 30 is checked after assembly. If the jumping value exceeds the specified value, the bearing is not assembled properly and can not be applied to the engine rotor.

Further, since the engine rotor is a high-speed rotor, after a certain period of operation, the retainer 20 is checked for a runout value with respect to the inner ring 30, and if the runout value exceeds a predetermined value, the bearing needs to be replaced. The runout value of the retainer 20 relative to the inner ring 30 is measured by using a high-precision rotary table, the position of the bearing inner ring 30 on the rotary table is aligned during measurement, the axis of the bearing is consistent with the rotation axis of the rotary table, and then the runout value of the retainer 20 is measured by using a meter. The alignment process is complicated and the measurement period is long.

In view of the above, a new tool for measuring the run-out of the bearing retainer relative to the inner ring and a measuring method thereof have been developed by those skilled in the art, in order to overcome the above technical problems.

Disclosure of Invention

The invention provides a runout measuring tool and a runout measuring method for a bearing retainer relative to an inner ring, aiming at overcoming the defects of complicated alignment process, long measuring period and the like of runout detection of the bearing retainer relative to the inner ring in the prior art.

The invention solves the technical problems through the following technical scheme:

the tool for measuring the runout of the bearing retainer relative to the inner ring is characterized by comprising a support, a dial gauge stand, a dial gauge and a double-measuring head, wherein the dial gauge stand is fixed on the upper end surface of one side of the support, the dial gauge is installed on the dial gauge stand and positioned above the support, and a gauge head of the dial gauge is fixed on the dial gauge stand and extends outwards along the horizontal direction;

the double measuring heads are rotatably connected to the outer end part of the dial gauge frame, so that the upper measuring heads of the double measuring heads are in contact with the dial gauge heads of the dial gauge;

the shape of the support is matched with the inner ring inner hole of the bearing to be measured, and when the support is installed to the inner ring inner hole of the bearing to be measured, the lower measuring heads of the double measuring heads are in contact with the cylindrical surface to be measured of the retainer of the bearing to be measured.

According to one embodiment of the present invention, the watch frame includes a first mounting portion fixed to an upper end surface of the support and a second mounting portion connected to an outer end portion of the first mounting portion and located outside the support.

According to one embodiment of the invention, the dial indicator is fixed on the first installation part, the second installation part is L-shaped, the gauge head of the dial indicator is fixed on the upper end part of the second installation part, the double measuring heads are fixed on the outer end part of the second installation part, and the upper end part and the outer end part are perpendicular to each other.

According to one embodiment of the invention, the upper end part of the second installation part is provided with a first installation groove, the gauge head of the dial indicator penetrates through the first installation groove, and the gauge head of the dial indicator is clamped through the positioning piece.

According to one embodiment of the invention, the outer end part of the second mounting part is provided with a second mounting groove, and the double measuring heads are rotatably mounted in the second mounting groove.

According to one embodiment of the invention, the support is a notched stepped cylindrical structure, and the gauge stand and the dual measuring heads are located at a notched section of the support.

According to one embodiment of the invention, the support comprises a fixed seat and a positioning seat, the positioning seat is connected to the fixed seat, and the outer edge of the positioning seat protrudes out of the outer edge of the fixed seat to form a step.

According to one embodiment of the invention, the fixed seat is in clearance fit with an inner hole of the inner ring of the bearing to be tested, so that the support and the inner ring of the bearing to be tested are quickly centered.

The invention also provides a method for measuring the run-out of the bearing retainer relative to the inner ring, which is characterized in that the measuring method adopts the run-out measuring tool of the bearing retainer relative to the inner ring, and the measuring method comprises the following steps:

S₁placing the assembled jump measuring tool of the bearing retainer relative to the inner ring on the inner ring of the bearing to be measured, and adjusting the positions of the dial indicator and the double measuring heads to enable the lower measuring heads of the double measuring heads to be in contact with the surface to be measured of the retainer of the bearing to be measured;

S₂resetting the dial indicator;

S₃manually pressing the support, simultaneously rotating a retainer of the bearing to be tested to rotate for a circle along the inner ring of the bearing to be tested, and measuring the bounce value of the retainer relative to the inner ring of the bearing to be tested;

S₄and if the jumping value exceeds the specified value, the bearing to be tested is unqualified in assembly.

According to an embodiment of the invention, the support in the runout measuring tool comprises a fixed seat and a positioning seat, the positioning seat is connected to the fixed seat, the outer edge of the positioning seat protrudes out of the outer edge of the fixed seat to form a step, and the bottom surface of the step of the positioning seat is attached to the upper end surface of the inner ring of the bearing to be measured.

The positive progress effects of the invention are as follows:

the invention relates to a tool and a method for measuring the runout of a bearing retainer relative to an inner ring.

The bounce measuring tool for the inner ring of the bearing retainer is simple in structure, convenient and fast to mount and gauge, simple to operate, capable of shortening measuring time and low in production cost.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:

fig. 1 is a schematic structural diagram of a roller bearing commonly used in an aircraft engine in the prior art.

Fig. 2 is a perspective view of the runout measuring tool of the bearing cage of the present invention with respect to the inner ring.

FIG. 3 is an axial cross-sectional view of the runout measuring tool of the bearing cage of the present invention relative to the inner race.

FIG. 4 is a schematic view showing the operational state of the tool for measuring the run-out of the bearing cage relative to the inner ring according to the present invention.

Fig. 5 is an axial cross-sectional view of the runout measuring tool of the bearing cage relative to the inner race of the present invention in use.

[ reference numerals ]

Rolling body 10

Retainer 20

Inner ring 30

Support 100

Watch holder 200

Dial gauge 300

Watch head 310

Double measuring head 400

Upper measuring head 410

Lower measuring head 420

First mounting part 210

Second mounting portion 220

First mounting groove 221

Second mounting groove 222

Positioning member 500

The cut-out section 110

Fixed seat 120

Positioning seat 130

Step 131

Fixing member 600

Pin 610

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.

Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.

Fig. 2 is a perspective view of the runout measuring tool of the bearing cage of the present invention with respect to the inner ring. FIG. 3 is an axial cross-sectional view of the runout measuring tool of the bearing cage of the present invention relative to the inner race. FIG. 4 is a schematic view showing the operational state of the tool for measuring the run-out of the bearing cage relative to the inner ring according to the present invention. Fig. 5 is an axial cross-sectional view of the runout measuring tool of the bearing cage relative to the inner race of the present invention in use.

As shown in fig. 2 to 5, the invention discloses a tool for measuring the run-out of a bearing retainer relative to an inner ring, which comprises a support 100, a gauge stand 200, a dial gauge 300 and a double measuring head 400, wherein the gauge stand 200 is fixed on the upper end surface of one side of the support 100, the dial gauge 300 is arranged on the gauge stand 200 and positioned above the support 100, and the gauge head of the dial gauge 300 is fixed on the gauge stand 200 and extends outwards along the horizontal direction. The double measuring head 400 is rotatably coupled to an outer end portion of the meter frame 200 such that the upper measuring head 410 of the double measuring head 400 is in contact with the gauge head 310 of the dial gauge 300. The shape of the carrier 100 is adapted to fit the inner bore of the inner ring 30 of the bearing to be tested. When the support 100 is mounted to the inner hole of the inner ring 30 of the bearing to be measured, the lower measuring heads 420 of the dual measuring heads 400 are in contact with the cylindrical surface to be measured of the retainer 20 of the bearing to be measured.

Preferably, the bezel 200 includes a first mounting portion 210 and a second mounting portion 220, the first mounting portion 210 is fixed to an upper end surface of the stand 100, and the second mounting portion 220 is connected to an outer end portion of the first mounting portion 210 and is located outside the stand 100.

Further, the dial indicator 300 is fixed on the first installation part 210, the second installation part 220 is in an L shape, the gauge head 310 of the dial indicator 300 is fixed at the upper end part of the second installation part 210, the double measuring heads 400 are fixed at the outer end part of the second installation part 220, and the upper end part and the outer end part are perpendicular to each other.

Here, the upper end portion of the second mounting portion 220 is preferably formed with a first mounting groove 221, the gauge head 310 of the dial gauge 300 is inserted into the first mounting groove 221, and the gauge head 310 of the dial gauge 300 is clamped by a positioning member 500 (e.g., a bolt). The outer end of the second mounting portion 220 is opened with a second mounting groove 222, and the double measuring head 400 is rotatably mounted in the second mounting groove 222.

Preferably, the support 100 is a notched stepped cylindrical structure, and the meter stand 200 and the dual gauge head 400 are located at the notched section 110 of the support 100. The support 100 preferably includes a fixing base 120 and a positioning base 130, the positioning base 130 is connected to the fixing base 120, and an outer edge of the positioning base 130 protrudes out of an outer edge of the fixing base 120 to form a step 131.

The fixing seat 120 is in clearance fit with the inner hole of the inner ring 30 of the bearing to be tested, so that the support 100 and the inner ring 30 of the bearing to be tested are quickly centered.

According to the above structural description, the runout measuring tool of the bearing retainer relative to the inner ring of the present invention can fix the watch frame 200 to the support 100 by the fixing member 600 (e.g., a bolt) and then fix the double measuring head 400 to the watch frame 200 by the pin 610 when assembled. And simultaneously, the dial indicator 300 is installed on the dial frame 200, and the gauge head 310 of the dial indicator 300 is clamped through the positioning piece 500 (such as a bolt).

In this embodiment, support 100 adopts incision step cylinder structure, and incision section 110 is used for installing table frame 200 and two measuring heads 400, from inside to outside putting up the table, reduces table frame 200 profile and improves measurement stability, the bottom cylinder with the little clearance fit of hole of the inner ring of the bearing that awaits measuring realizes support 100 with the quick centering of the inner ring of the bearing that awaits measuring.

The gauge stand 200 is preferably of a hook type structure and is fixed to the stand 100 by a measuring square stand, the top gauge stand (i.e., the first mount 210) is used to fix the dial gauge 300, and the bottom gauge stand (i.e., the second mount 220) is used to fix the double measuring head 400.

Here, the dial indicator 300 is mainly used for measuring the runout value of the retainer 20 of the bearing to be measured, and the double measuring heads 400 are preferably of an equidistant double measuring head structure, fixed on the gauge stand 200 through the pins 610 and used for fixing the double measuring heads 400, so that the double measuring heads can rotate around the axes of the pins 610. The upper measuring head 410 is in contact with the gauge head 310 of the dial gauge 300 which is horizontally placed, and the mutually perpendicular state is realized. The lower measuring head 420 is in contact with the cylindrical surface of the holder 20 to be measured, and the two are perpendicular to each other. According to the lever principle, the runout value of the holder 20 can be directly read by the dial indicator 300.

On the basis of the tool for measuring the run-out of the bearing retainer relative to the inner ring, the invention also provides a method for measuring the run-out of the bearing retainer relative to the inner ring, which adopts the tool for measuring the run-out of the bearing retainer relative to the inner ring, and the method specifically comprises the following steps:

S₁placing the assembled jump measuring tool of the bearing retainer relative to the inner ring on the inner ring of the bearing to be measured, and adjusting the positions of the dial indicator and the double measuring heads to enable the lower measuring heads of the double measuring heads to be in contact with the surface to be measured of the retainer of the bearing to be measured;

S₂resetting the dial indicator;

S₃manually pressing the support, simultaneously rotating a retainer of the bearing to be tested to rotate for a circle along the inner ring of the bearing to be tested, and measuring the bounce value of the retainer relative to the inner ring of the bearing to be tested;

S₄and if the jumping value exceeds the specified value, the bearing to be tested is unqualified in assembly.

The support 100 in the runout measuring tool includes a fixing seat 120 and a positioning seat 130, the positioning seat 130 is connected to the fixing seat 120, an outer edge of the positioning seat 130 protrudes out of an outer edge of the fixing seat 120 to form a step 131, and a bottom surface of the step 131 of the positioning seat 130 is attached to an upper end surface of the inner ring 30 of the bearing to be measured.

The invention relates to a tool for measuring the jump of a bearing retainer relative to an inner ring and a measuring method thereof, which have the following characteristics:

the bearing of the dial indicator is fixed through the inner hole design of the bearing inner ring, the bearing is in small clearance fit with the inner hole of the bearing inner ring, the bearing inner ring can be directly placed on the bearing inner ring, and the rapid alignment of the dial indicator fixing seat is achieved.

And secondly, the meter is erected from inside to outside from the fixed seat, the outline size of the meter frame is reduced, the rigidity of the meter frame is improved, and the measurement stability is improved.

And thirdly, realizing the runout measurement of the bearing retainer relative to the inner ring through a group of measuring heads, wherein two measuring heads with equal length are arranged in the vertical direction, the upper measuring head is contacted with a horizontally placed dial indicator head, the lower measuring head is contacted with a cylindrical surface to be measured of the retainer, and the runout value of the retainer can be directly read through the dial indicator according to a lever principle.

And fourthly, the horizontal frame meter is visual in measurement and convenient to read, and the pulsation measurement of the vertical cylindrical surface is realized through the horizontally fixed dial indicator.

In summary, the tool for measuring the runout of the bearing retainer relative to the inner ring and the measuring method thereof utilize the characteristic that the bearing retainer and the rolling body can rotate relative to the inner ring, directly utilize the inner hole of the bearing inner ring to place the measuring frame, and then realize the runout measurement of the bearing retainer relative to the inner ring through a group of measuring heads according to the lever principle.

The bounce measuring tool for the inner ring of the bearing retainer is simple in structure, convenient and fast to mount and gauge, simple to operate, capable of shortening measuring time and low in production cost.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.