Wind power main bearing ring wall thickness difference detection device

Abstract

The utility model belongs to the field of bearing manufacturing, and provides a device for detecting the wall thickness difference of a wind power main bearing ring. The detection device comprises a detection platform and a detection measuring tool, a plurality of equal-height measuring blocks which are uniformly distributed along the circumference are mounted on the detection platform; the detection measuring tool is provided with an end face supporting plate supported on a detected workpiece; the lower end face of the end face supporting plate is provided with an end face elastic supporting block used for making point contact with the upper end face of a measured workpiece. The two ends of the end face supporting plate are provided with an inner diameter supporting plate and a roller path supporting plate respectively. The inner diameter supporting plate and the roller path supporting plate are both arranged perpendicular to the end face supporting plate. The outer side wall surface of the inner diameter supporting plate is provided with an inner diameter elastic supporting block which is in point contact with the inner diameter surface of the measured workpiece. A measuring dial indicator is mounted on the raceway supporting plate; and the gauge head of the measuring dial gauge is in contact with the outer diameter surface of the raceway. According to the utility model, the detection precision and the detection repeatability precision are high, and the detection efficiency is more convenient and efficient.

Description

Technical Field

[0001] The utility model belongs to the field of bearing manufacturing, and specifically designs a detection device for the wall thickness difference of the raceway of a wind power main bearing. Background Technique

[0002] The product structures currently adopted for wind power main shaft bearings mainly include single-row tapered roller bearings, double-row tapered roller bearings, and double-row spherical roller bearings; among them, the wall thickness difference between the outer raceway and the outer diameter, and between the inner raceway and the inner diameter, that is, the thickness variation of the single-plane radial inner raceway with respect to the outer diameter or inner diameter, is a key technical index of the bearing raceway. Especially for tapered main bearings, there is a large axial preload during installation and use. If there are problems with the wall thickness difference, it will seriously affect the force distribution of the bearing.

[0003] For general bearings, their detection mainly uses a fulcrum fixed on the platform to support the bearing plane, a positioning center point or a disc fixed on the platform to support the outer diameter or inner diameter, and a dial indicator fixed on the platform and pointing to the raceway for detection. Then, the operator rotates the raceway manually and observes the maximum variation of the dial indicator. This data is the wall thickness difference of the raceway.

[0004] However, with the large-scale development of wind turbines, the size of the main bearings is getting larger and the weight is getting heavier. Currently, the outer diameter of the bearings already in application has reached φ3200mm, and the weight of a single part has exceeded 1000 Kg. In the existing detection methods, it is difficult to rotate the raceway manually during detection, and due to the weight of the raceway during rotation, the support points cannot make normal contact with the part to be measured and displacement occurs, so the detection accuracy and repeatability cannot be guaranteed. Therefore, the validity of the obtained data is also questionable; at the same time, due to the huge rotational friction force, the raceway will be scratched.

[0005] Under all current circumstances, for large and heavy bearing raceways that cannot be detected on the detection platform, manufacturing enterprises often use the roundness of the raceway and the outer diameter or inner diameter measured on the machine tool for indirect evaluation. However, this detection method measures the raceway and the outer diameter and inner diameter separately, and cannot truly represent the wall thickness variation of the raceway. The detection data can only be used as a reference. Content of the Utility Model

[0006] To solve the above technical problems, the utility model proposes a detection device for the wall thickness difference of the raceway of a wind power main bearing to solve the problems existing in the detection of the wall thickness difference of the existing wind power main bearing raceway, such as methods, accuracy, repeatability accuracy, etc., caused by the too large diameter and heavy self-weight of the raceway.

[0007] The utility model adopts the following technical solutions to complete the above utility model tasks:

[0008] A detecting device for wall thickness difference of main bearing rings of wind turbines, the detecting device comprising a detecting platform and a detecting measuring tool; a plurality of equally spaced height measuring blocks are installed on the detecting platform along the circumference; the detecting measuring tool has an end face support plate supported on the workpiece to be measured; an end face elastic support block for point contact with the upper end point of the measuring workpiece is installed on the lower end face of the end face support plate; inner diameter support plates and raceway support plates are respectively installed at both ends of the end face support plate; the inner diameter support plates and the raceway support plates are both perpendicular to the end face support plate; an inner diameter elastic support block for point contact with the inner diameter point of the measuring workpiece is installed on the outer side wall surface of the inner diameter support plate; a measuring micrometer is installed on the raceway support plate; the head of the measuring micrometer is in contact with the outer diameter surface of the raceway.

[0009] The detecting platform is a circular detecting platform, on which a plurality of T-shaped grooves are provided; the height measuring blocks are fixed to the T-shaped grooves through T-shaped sliders and are used for leveling and supporting the workpiece to be measured;

[0010] Both ends of the end face support plate have rectangular grooves for positioning and installing the inner diameter support plates and the raceway support plates.

[0011] The head of the end face elastic support block is spherical in contact with the measuring workpiece, and the other end is a cylinder in interference fit with the end face support plate.

[0012] There are three end face elastic support blocks, forming a three-point surface support and being in point contact with the measuring workpiece, playing a role in stable end face support and reducing friction.

[0013] There are two inner diameter elastic support blocks, forming a two-point line support and being in point contact with the measuring workpiece, playing a role in stable radial support and reducing friction.

[0014] The method for detecting the wall thickness difference of the main bearing rings of wind turbines by using the above detecting device is as follows, and the detecting method comprises the following steps:

[0015] 1), Place the workpiece to be measured on the height measuring blocks of the detecting platform and keep the workpiece plane leveled;

[0016] 2), Clean the measured part of the workpiece and the contact part of the detecting measuring tool, and evenly apply a layer of lubricating oil to make the sliding smooth during measurement;

[0017] 3), Clean the end face elastic support block and the inner diameter elastic support block of the detecting device;

[0018] 4), Make the end face elastic support block contact with the workpiece end face and the inner diameter elastic support block contact with the workpiece inner diameter;

[0019] 5), Install the measuring micrometer, make the micrometer head contact with the raceway of the workpiece to be measured and form a certain amount of preload;

[0020] 6), Lock and position the calibrated micrometer through the bottom threaded holes of the gauge raceway support plate;

[0021] 7), With the end face fulcrum and the inner diameter fulcrum in contact, swing the gauge at a small angle and observe that the micrometer changes normally, then the gauge adjustment and preparation are completed;

[0022] 8), Repeat the seventh step, rotate the gauge one full week, observe and record the maximum swing range of the micrometer, then the measurement process is completed, and the maximum swing range of the micrometer is the wall thickness difference of a single section of the raceway.

[0023] A wall thickness difference detection device for a wind power main bearing race proposed by the present utility model has a reliable method, that is, the detection accuracy and the detection repeatability accuracy are high, and it is more convenient and efficient for the detection efficiency;

[0024] This detection method effectively solves the measurement errors such as the tooling deformation caused by the self-weight of the race or the displacement that is likely to occur during measurement due to the heavy self-weight of the workpiece in the original detection method;

[0025] This device is lightweight, and the contact points in contact with the race use engineering plastics as supports, and it will not cause damage to the measured parts during use;

[0026] This device is simple to operate and use. After training the users, they can quickly master the use skills, avoiding complex adjustments and the need for personnel experience.

[0027] This device has good versatility, avoiding the need to configure one set of detection tools for each product model in the original detection method, and the use cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a side view of the structure of the present utility model.

[0029] Figure 2 It is a top view of the structure of the present utility model.

[0030] Figure 3 It is a partial cross-sectional view of the present utility model patent in positioning contact with the workpiece to be measured.

[0031] In the figure: 1, end face support plate; 2, end face elastic support block; 3 / 9, connecting screw; 4, inner diameter support plate; 5, inner diameter elastic support block; 6, micrometer compression screw; 7, measuring micrometer; 8, raceway support plate; 10, equal height measuring block; 11, detection platform; 12, workpiece to be measured. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0033] As Figures 1 to 3As shown in the figure, a detection device for the wall thickness difference of the main bearing ring of a wind turbine includes a detection platform 11 and a detection measuring tool 13; a plurality of equally spaced height measuring blocks 10 are installed on the detection platform 11 along the circumference; the detection platform is a circular detection platform, and a plurality of T-shaped grooves are provided thereon; the height measuring blocks are fixed to the T-shaped grooves through T-shaped sliders and are used for leveling and supporting the workpiece to be measured; the detection measuring tool has an end face support plate 1 supported on the workpiece to be measured; an end face elastic support block 2 for point contact with the upper end point of the measuring workpiece is installed on the lower end face of the end face support plate 1; the end face elastic support block is three, forming a three-point surface support and being in point contact with the measuring workpiece, playing a role in stable end face support and reducing friction; rectangular grooves are provided at both ends of the end face support plate; an inner diameter support plate 4 and a raceway support plate 8 are respectively installed at both ends of the end face support plate 1; the inner diameter support plate 4 and the raceway support plate 5 are both perpendicular to the end face support plate 1; an inner diameter elastic support block 4 for point contact with the inner diameter point of the measuring workpiece is installed on the outer wall surface of the inner diameter support plate 4; the inner diameter elastic support block is two, forming a two-point line support and being in point contact with the measuring workpiece, playing a role in stable radial support and reducing friction; a measuring micrometer 7 is installed on the raceway support plate 8; the head of the measuring micrometer 7 is in contact with the outer diameter surface of the raceway.

[0034] The head of the end face elastic support block 2 is spherical in contact with the measuring workpiece, and the other end is a cylinder in interference fit with the end face support plate.

[0035] One section of the inner diameter elastic support block 5 has a spherical head in contact with the workpiece, and the other end is a stepped cylinder in interference fit with the stepped hole of the inner diameter support plate 4;

[0036] The materials of the inner diameter elastic support block 5 and the end face elastic support block 2 are both POM or PTFE, which play a role in reducing friction and preventing scratching;

[0037] The measuring tool raceway support plate 8 has 1 through hole for installing the measuring micrometer 8;

[0038] The measuring tool raceway support plate 8 has 1 threaded hole, and the measuring micrometer 7 is locked by using the micrometer compression screw 8;

[0039] The measuring tool raceway support plate 8 is provided with 2 through holes and is connected to the measuring tool end face support plate 1 through screws 3;

[0040] The steps of a detection measuring tool for the wall thickness difference of the main bearing ring of a wind turbine and its use method according to the present invention are as follows:

[0041] (1) Install the height measuring blocks on the detection platform and level them, and the distances between the measuring blocks and the outer diameter of the detection platform are the same;

[0042] (2) Place the workpiece to be measured on the equal-height measuring blocks of the inspection platform;

[0043] (3) Press-fit the 3 end-face elastic support blocks into the holes of the end-face support plate of the measuring tool;

[0044] (4) Press-fit the 2 inner-diameter elastic support blocks into the holes of the inner-diameter support plate of the measuring tool;

[0045] (5) Fix the inner-diameter support plate and the raceway support plate of the measuring tool to the end-face support plate of the measuring tool with screws and press them tightly;

[0046] (6) Place the assembled measuring tool on the end face and inner diameter of the workpiece to be measured through the end-face point support and the inner-diameter point support;

[0047] (7) Install the measuring micrometer in the hole of the raceway support plate. After adjusting the pre-tightening amount of the micrometer, fix it with the micrometer compression screw of the raceway support plate to complete the assembly of the instrument and the calibration of the micrometer;

[0048] (8) After supporting the assembled inspection measuring tool through the end-face support points and the inner-diameter support points, rotate it around the ring for one week to complete the measurement process. Read and record the maximum and minimum differences of the measuring micrometer, which is the measured value of the wall thickness difference of a single cross-section of the ring.

Claims

1. A wind turbine main bearing ring wall thickness difference detection device, characterized in that: The detection device includes a detection platform and a detection gauge; a plurality of equal-height measuring blocks evenly distributed along the circumference are installed on the detection platform; the detection gauge has an end face support plate supported on the workpiece to be measured; the lower end face of the end face support plate is installed with an end face elastic support block for point contact with the upper end face of the measured workpiece; the inner diameter support plate and the raceway support plate are installed at both ends of the end face support plate respectively; the inner diameter support plate and the raceway support plate are both arranged perpendicular to the end face support plate; the inner diameter elastic support block for point contact with the inner diameter surface of the measured workpiece is installed on the outer wall surface of the inner diameter support plate; the raceway support plate is installed with a measuring micrometer; the head of the measuring micrometer is in contact with the outer diameter surface of the raceway.

2. A wind turbine main bearing ring wall thickness difference detection device according to claim 1, characterized in that: The detection platform is a circular detection platform, on which a plurality of T-slots are provided; the equal height measuring blocks are fixed to the T-slots via T-slide blocks, and are used for leveling and supporting the workpiece to be measured.

3. A wind turbine main bearing ring wall thickness difference detection device as claimed in claim 1, characterized in that: Both ends of the end surface support plate are provided with rectangular grooves for positioning and installing the inner diameter support plate and the raceway support plate.

4. A wind turbine main bearing ring wall thickness difference detection device as claimed in claim 1, characterized in that: The head of the end face elastic support block is spherical and contacts the measured workpiece, and the other end is a cylinder that is interference fit with the end face support plate.

5. A wind turbine main bearing ring wall thickness difference detection device as claimed in claim 1, characterized in that: There are three elastic support blocks on the end face, which form a three-point support surface and are in point contact with the measured workpiece, thereby stabilizing the end face support and reducing friction.

6. A wind turbine main bearing ring wall thickness difference detection device as claimed in claim 1, characterized in that: There are two inner diameter elastic support blocks, which form a two-point linear support and are in point contact with the measured workpiece.

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