Clearance detection device for angular contact bearings in paired installation

Abstract

The utility model discloses an angular contact bearing clearance detection device for paired installation, and the device comprises a bottom plate which serves as a supporting part of the detection device. The locking piece comprises a locking rod, the locking rod is connected with the bottom plate, a locking thread is formed on the locking rod, and a locking nut matched with the locking thread is arranged on the locking rod; the clamping piece is located between the locking implementation nut and the bottom plate, and the locking rod is sleeved with the clamping piece; the mounting rod is fixedly connected to the bottom plate, the clamping piece is arranged on the side, matched with the locking nut in a threaded mode, of the mounting rod, the clamping piece is driven to move on the mounting rod by means of threaded fit of the locking nut on the mounting rod, finally, the inner ring of the bearing is clamped between the clamping piece and the bottom plate, and the outer ring of the bearing is manually rotated, so that the inner ring of the bearing is clamped between the clamping piece and the bottom plate. And whether the bearing has obvious clamping stagnation and resistance can be intuitively observed.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and in particular relates to a clearance detection device for angular contact bearings that are installed in pairs. Background Art

[0002] Multi-stage water pumps are assembled with multiple impellers, guide vanes, and mid-sections, and the rotor is a high-speed rotating machine. There must be a gap between the rotating rotor components and the stationary component housings. Therefore, the positioning or movement of the support bearings must adopt mechanical or hydraulic balancing measures to avoid contact friction. Based on hydraulic calculations and structural design, the shaft system of a balanced multi-stage pump usually uses a pair of angular contact bearings installed back to back at one end. The outer ring is fixed by the gland of the bearing body, and a gap is left for thermal expansion. The inner ring is locked and fixed to prevent the entire rotor component from moving during operation, resulting in the disappearance of the gap and friction damage.

[0003] Although bearings are standardized and manufactured with high precision, the inner and outer rings of a pair of selected bearings (angular contact bearings) are still allowed to have certain differences within the range of form and position tolerances and dimensional accuracy. In the back-to-back installation type, when locking the inner ring, the preload force in the actual operation and installation process, even if controlled by a torque wrench, will cause heating and shortened service life of the paired bearings during operation due to the different clearances of each bearing and the high and low temperature of the liquid medium used in the water pump. The existing bearing installation lacks a clearance detection device and cannot detect the flatness and levelness of the bearings. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a clearance detection device for angular contact bearings installed in pairs.

[0005] The technical solution adopted by the present utility model includes:

[0006] a bottom plate, serving as a supporting component of the detection device;

[0007] A locking member, comprising a locking rod connected to the base plate, a locking thread formed on the locking rod, and a locking nut adapted to the locking thread provided on the locking rod;

[0008] A clamping member is located between the locking nut and the base plate, and the clamping member is sleeved on the locking rod;

[0009] The bearing is located between the clamping member and the base plate, and two ends of the inner ring of the bearing are respectively in contact with the clamping member and the base plate.

[0010] As a preferred embodiment of the present invention, a mounting hole is provided on the base plate, the mounting hole passes through the base plate, the cross-section of the mounting hole is in a "convex" shape, the locking member also includes a mounting rod, a limiting plate is provided at the bottom of the mounting rod, one end of the mounting rod is fixedly connected to the limiting plate, and the other end is fixedly connected to the locking rod, and the limiting plate is installed in the mounting hole.

[0011] As a preferred embodiment of the present invention, it further comprises an inner ring sleeve, the cross section of the inner ring sleeve is a circular arc, a limiting step is formed on the inner ring sleeve, and one end of the inner ring of the bearing abuts against the limiting step.

[0012] As a preferred embodiment of the present invention, the other end of the bearing inner ring away from the limiting plate abuts against the clamping member, and the installation height of the bearing on the inner ring sleeve is higher than the upper end surface of the inner ring sleeve.

[0013] As a preferred embodiment of the present invention, the clamping member is a stepped pressure plate, and two stepped pressure plates are provided. The two stepped pressure plates are relatively distributed and are respectively sleeved on the mounting rod and the locking rod.

[0014] As a preferred embodiment of the present invention, the stepped pressure plate includes a large stepped pressure plate and a small stepped pressure plate, the large stepped pressure plate and the small stepped pressure plate are connected end to end, and the axial section of the connection between the large stepped pressure plate and the small stepped pressure plate is trapezoidal.

[0015] As a preferred embodiment of the present invention, a mounting step is formed on the peripheral surface of the stepped pressure plate, and the mounting step is provided with multiple sections, and the multiple sections of the mounting step are equidistantly distributed along the height of the stepped pressure plate.

[0016] The beneficial effects of the utility model are:

[0017] The utility model is a clearance detection device for angular contact bearings installed in a paired manner. A mounting rod is fixedly connected to a base plate, and a clamping piece is provided on one side of the mounting rod on which a locking nut is threadedly engaged. The threaded engagement of the locking nut on the mounting rod is utilized to drive the movement of the clamping piece on the mounting rod, thereby ultimately clamping the inner ring of the bearing between the clamping piece and the base plate. By manually rotating the outer ring of the bearing, it is possible to visually observe whether the bearing has obvious sticking and resistance. In addition, a dial indicator can be used to detect the runout on the side of the outer ring of the bearing to detect whether the bearing meets the standard, thereby improving the standard of the bearing loading equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of an embodiment of the utility model in which there is a height difference between the bearings.

[0021] In the figure: 1. Base plate; 2. Clamping part; 3. Locking part; 4. Inner ring sleeve; 5. Bearing; 6. Washer; 11. Mounting hole; 21. Mounting step; 22. Step pressure plate; 221. Large step pressure plate; 222. Small step pressure plate; 31. Mounting rod; 32. Limit plate; 33. Locking rod; 34. Locking nut. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0024] The following combination Figure 1-2 The specific embodiment of the utility model is described, which is a clearance detection device for angular contact bearings installed in pairs, comprising:

[0025] Base plate 1, serving as a supporting component of the detection device;

[0026] The locking member 3 includes a locking rod 33 connected to the base plate 1. A locking thread is formed on the locking rod 33. A locking nut 34 is provided on the locking rod 33 to match the locking thread. The locking nut 34 can move up and down on the locking rod 33 through threaded engagement, thereby locking and fixing the bearing 5 between the locking nut 34 and the base plate 1.

[0027] The clamping member 2 is located between the locking nut 34 and the base plate 1. The clamping member 2 is sleeved on the locking rod 33. The clamping member 2 and the locking rod 33 are sleeved together, and the clamping member 2 is moved up and down on the mounting rod 31 under the action of the locking nut 34.

[0028] The bearing 5 is located between the clamping member 2 and the base plate 1, and the two ends of its inner ring are respectively in contact with the clamping member 2 and the base plate 1. When the bearing 5 is clamped and limited, the clamping member 2 is in contact with the top of the inner ring of the bearing 5, and the lower bottom of the inner ring of the bearing 5 is connected and abutted with the base plate 1. The clamping member 2 is locked by the threaded engagement of the locking nut 34 on the mounting rod 31, so that the bearing 5 is clamped between the clamping member 2 and the base plate 1.

[0029] Please refer to Figure 1-2 When the cam 33 is in the unlock state, the locking member 31 is locked and the locking member 31 is locked.

[0030] Please refer to Figure 1-2 As shown, it also includes an inner ring sleeve 4, the cross-section of the inner ring sleeve 4 is an arc, and a limiting step 41 is formed on the inner ring sleeve 4. One end of the inner ring of the bearing 5 abuts against the limiting step 41, and the inner ring of the bearing 5 is located on the limiting step 41. The inner ring sleeve 4 serves as the installation reference for an optional pair of bearings 5. The outer circle diameter of the inner ring of the sleeve can be 5mm or 10mm to make two pieces, which meets the optional installation and detection requirements of all standard bearing 5 sizes. The outer circle diameter (according to the matching reference h7 method) is assembled and positioned with the inner ring size of the bearing 5. Providing a standard series of parts with a diameter grade difference of 10mm can meet daily matching, so that the device can adapt to bearings 5 ​​of different sizes.

[0031] Please refer to Figure 1-2 As shown, the other end of the inner ring of the bearing 5 away from the limit plate 32 is in contact with the clamping member 2, and the installation height of the bearing 5 on the inner ring sleeve 4 is higher than the upper end surface of the inner ring sleeve 4, so that the top of the inner ring sleeve 4 is slightly lower than the upper end surface of the bearing 5, thereby achieving clamping of different bearings 5.

[0032] Please refer to Figure 2As shown, the clamping member 2 is a stepped pressure plate 22, and two stepped pressure plates 22 are provided. The two stepped pressure plates 22 are relatively distributed, and the two stepped pressure plates 22 are respectively sleeved on the mounting rod 31 and the locking rod 33. A multi-section stepped large pressure plate 221 is formed on the stepped pressure plate 22. The two ends of the inner ring sleeve 4 are installed in the stepped large pressure plate 221 to achieve clamping of the bearing 5. Due to the setting of the stepped pressure plate 22, the lateral movement of the inner ring sleeve 4 is limited, which effectively prevents the inner ring sleeve 4 from moving left and right on the clamping member 2.

[0033] Please refer to Figure 2 As shown, the stepped pressure plate 22 includes a large stepped pressure plate 221 and a small stepped pressure plate 222, and the large stepped pressure plate 221 and the small stepped pressure plate 222 are connected end to end, and the axial section of the connection between the large stepped pressure plate 221 and the small stepped pressure plate 222 is trapezoidal. By splitting the clamping part 2 into two small stepped pressure plates 222 and a large stepped pressure plate 221, on the one hand, the weight of the part is reduced, and the large stepped pressure plate 221 or the small stepped pressure plate 222 can be used separately to clamp the bearing 5, which is convenient for the strength of the operation. On the other hand, the part blank can be selected flexibly on-site, and there is no need to specially prepare large thickness materials, thereby reducing the amount of turning.

[0034] Please refer to Figure 1-Figure 2 As shown, a mounting step 21 is formed on the peripheral surface of the stepped pressure plate 22. The mounting step 21 has multiple sections. The multiple sections of the mounting steps 21 are evenly distributed along the height of the stepped pressure plate 22. The multiple sections of the mounting steps 21 can adapt to bearings 5 ​​of different sizes.

[0035] The working principle of this utility model:

[0036] The limiting plate 32 is clamped and positioned in the mounting hole 11 to securely connect the mounting rod 31 to the base plate 1;

[0037] Place the inner ring sleeve 4 on the base plate 1. The distance between the inner ring sleeve 4 and the center of the base plate 1 can be adjusted by judging the size of the bearing 5.

[0038] A pair of angular contact bearings 5 ​​are first mounted back-to-back on the limiting step 41 formed by the inner ring sleeve 4, so that the bottom of the inner ring of the bearing 5 abuts against the top of the base plate 1;

[0039] The bottom of the clamping part 2 is brought into contact with the top of the bearing 5, and the locking nut 34 is installed on the locking rod 33. The locking nut 34 cooperates with the thread of the locking rod 33 to make the locking nut 34 drive the clamping part 2 to gradually move toward the side of the bearing 5, and finally the bearing 5 is clamped between the clamping part 2 and the base plate 1. Manually turn the outer ring without obvious sticking and resistance. The outer ring should be turned gently without abnormal sound. After fast turning, the deceleration of the outer ring is uniform. Use a dial indicator to check the runout of the outer ring of the bearing 5. For example, the commonly used 80mm 7316 bearing 5 is subjected to normal force in normal use. Under these conditions, if the clearance runout is 0.026-0.038mm, the paired bearing 5 can meet the use requirements. After marking the pairing symbol, it can be installed on the rotor component of the equipment. If there is a large resistance on the outer ring of the cranking, it means that there is a height difference between the end faces of the bearing 5 and there is a gap between the inner rings. At this time, the adjusting washer 6 is placed between the two inner rings of the bearing 5, and then the inspection is carried out. By increasing or decreasing the thickness of the adjustment washer, the change in the cranking state can be clearly seen. When adding shims for adjustment, the outer ring gap should not exceed 0.05-0.08mm. The gap size can be easily detected by using a feeler gauge.

[0040] The clamping member 2 is a stepped pressure plate 22, which can limit the lateral sliding of the bearing 5 and the inner ring sleeve 4 along the end surface of the clamping member 2, so that the inner ring sleeve 4 is restricted on the stepped pressure plate 22;

[0041] Among them, the stepped pressure plate 22 is composed of a large stepped pressure plate 221 and a small stepped pressure plate 222. The large stepped pressure plate 221 and the small stepped pressure plate 222 can clamp the bearing 5 separately. On the one hand, it reduces the weight of the parts. The large stepped pressure plate 221 or the small stepped pressure plate 222 can be used separately to clamp the bearing 5, which is convenient for the strength of the operation. On the other hand, it can have the characteristics of flexible on-site selection of part blanks, without the need to specially prepare large thickness materials, reducing the amount of turning.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.

Claims

1. A clearance detection device for angular contact bearings installed in pairs, characterized in that: include: A bottom plate (1) serving as a supporting component of the detection device; A locking member (3) includes a locking rod (33), the locking rod (33) is connected to the base plate (1), a locking thread is formed on the locking rod (33), and a locking nut (34) adapted to the locking thread is provided on the locking rod (33); A clamping member (2) is located between the locking nut (34) and the base plate (1), and the clamping member (2) is sleeved on the locking rod (33); The bearing (5) is located between the clamping member (2) and the base plate (1), and the two ends of its inner ring are respectively in contact with the clamping member (2) and the base plate (1).

2. The device for detecting clearance of angular contact bearings installed in pairs according to claim 1, characterized in that: The bottom plate (1) is provided with a mounting hole (11), the mounting hole (11) passes through the bottom plate (1), and the cross section of the mounting hole (11) is in a convex shape. The locking member (3) further comprises a mounting rod (31), a limiting plate (32) is provided at the bottom of the mounting rod (31), one end of the mounting rod (31) is fixedly connected to the limiting plate (32), and the other end is fixedly connected to the locking rod (33), and the limiting plate (32) is installed in the mounting hole (11).

3. The device for detecting clearance of angular contact bearings installed in pairs according to claim 2, characterized in that: It also includes an inner ring sleeve (4), the cross section of the inner ring sleeve (4) is an arc, a limiting step (41) is formed on the inner ring sleeve (4), and one end of the inner ring of the bearing (5) abuts against the limiting step (41).

4. The device for detecting clearance of angular contact bearings installed in pairs according to claim 3, characterized in that: The other end of the inner ring of the bearing (5) away from the limiting plate (32) abuts against the clamping member (2), and the installation height of the bearing (5) on the inner ring sleeve (4) is higher than the upper end surface of the inner ring sleeve (4).

5. The device for detecting clearance of angular contact bearings installed in pairs according to claim 2, characterized in that: The clamping member (2) is a stepped pressure plate (22), two stepped pressure plates (22) are provided, the two stepped pressure plates (22) are relatively distributed, and the two stepped pressure plates (22) are respectively sleeved on the mounting rod (31) and the locking rod (33).

6. The device for detecting clearance of paired angular contact bearings according to claim 5, characterized in that: The stepped pressing plate (22) comprises a stepped large pressing plate (221) and a stepped small pressing plate (222), wherein the stepped large pressing plate (221) and the stepped small pressing plate (222) are connected end to end, and the axis section of the connection between the stepped large pressing plate (221) and the stepped small pressing plate (222) is trapezoidal.

7. The device for detecting clearance of angular contact bearings installed in pairs according to claim 6, characterized in that: The stepped pressing plate (22) is formed with a mounting step (21) on its circumferential surface. The mounting step (21) is provided with multiple sections, and the multiple sections of the mounting step (21) are distributed at equal intervals along the height of the stepped pressing plate (22).

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