Measuring Device and Measuring Method

Abstract

The present invention relates to a measuring device and a measuring method. The measuring device includes: a stretching component detachably sleeved on the outer side of the gland bolt along the circumferential direction and located on the side of the bearing gland away from the bearing housing; a driving member connected to the stretching component for providing a driving force to the stretching component; a bridge fixedly installed on the bearing housing; and a measuring component installed on the bearing and / or the bearing gland. In the above-mentioned measuring device, the driving member provides a driving force to the stretching component to drive the stretching component to stretch the gland bolt. During the elongation process of the stretching component, the bearing gland and the bearing will be deformed, and then the measuring component measures the displacement of the bearing gland and / or the bearing relative to the bridge to obtain the tightening force of the bearing gland on the bearing. In this way, with the measuring device, it is possible to complete the reinstallation of the bearing gland while measuring the tightening force of the bearing gland on the bearing, avoiding measuring the tightening force first and then reinstalling, simplifying the measuring steps and improving the work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine maintenance, and in particular to a measuring device and a measuring method. Background Art

[0002] Bearings are widely used in many important working equipment of steam turbine power plants. Bearings mainly bear the weight of the rotor and the centrifugal force generated by the imbalance of the rotor. Bearings can determine the radial position of the rotor to ensure that the center of the rotor is consistent with the center of the cylinder to ensure the correct radial clearance between the rotor and the stationary part. Therefore, bearings need to be inspected regularly. After the inspection is completed, during the reinstallation of the bearing, it is necessary to measure the tightening force of the bearing gland on the bearing.

[0003] In the related technology, maintenance personnel usually use the lead wire pressing method to measure the bearing gland tightening force on the bearing. This measurement method requires first reinstalling the bearing gland according to the normal reinstallation steps and measuring the tightening force. After the measurement result is qualified, reinstall the bearing according to the normal reinstallation steps. The measurement steps are cumbersome. Summary of the invention

[0004] Based on this, it is necessary to provide a measuring device and a measuring method to simplify the measuring steps.

[0005] According to one aspect of the present application, an embodiment of the present application provides a measuring device for measuring the tightening force of a bearing gland on a bearing, wherein the bearing gland is mounted on a bearing box through gland bolts and gland nuts, and the bearing is arranged between the bearing gland and the bearing box, and the measuring device comprises:

[0006] A stretching assembly is detachably sleeved on the outer side of the gland bolt along the circumferential direction and is located on a side of the bearing gland away from the bearing box, and the stretching assembly is used to apply an external force to the gland bolt so that the gland bolt stretches in a direction away from the bearing box;

[0007] A driving member, connected to the stretching assembly, for providing a driving force for the stretching assembly;

[0008] A bridge frame fixedly mounted on the bearing box; and

[0009] A measuring component is installed on the bearing and / or the bearing cover, and is used to measure the displacement of the bearing cover and / or the bearing cover relative to the bridge.

[0010] In one of the embodiments, the measuring device further comprises a backing ring;

[0011] The gasket is sleeved on the outer side of the gland nut along the circumferential direction and is located between the bearing gland and the stretching assembly.

[0012] In one of the embodiments, a groove is formed on the outer circumference of the gasket ring and extends through the inner side thereof.

[0013] In one of the embodiments, the stretching assembly includes a stretching member and a stretching nut;

[0014] The stretching piece is sleeved on the outer side of the gland bolt, and the stretching nut is sleeved on the gland bolt;

[0015] The driving member is connected to the stretching member and is used to provide driving force for the stretching member.

[0016] In one of the embodiments, the measuring assembly includes a measuring member and a mounting seat;

[0017] The mounting seat is fixedly mounted on the bearing and / or the bearing cover, one end of the measuring member is mounted on the mounting seat, and the other end of the measuring member contacts the bridge.

[0018] In one embodiment, the measuring components are divided into two groups, one group of the measuring components is installed on the bearing, and the other group of the measuring components is installed on the bearing cover, and the two groups of the measuring components are arranged opposite to each other to contact opposite sides of the bridge.

[0019] In one of the embodiments, the measuring device further comprises a distance measuring device, and the distance measuring device is used to measure the elongation of the gland bolt under the action of the external force applied by the tensioning assembly.

[0020] According to another aspect of the present application, an embodiment of the present application provides a measurement method, which adopts the above-mentioned measurement device; the measurement method comprises the following steps:

[0021] Install the bridge on the bearing box, and install the measuring assembly on the bearing and / or the bearing gland;

[0022] Applying a pre-tightening force to the gland bolts by the stretching assembly so that the gland bolts extend in a direction away from the bearing box;

[0023] The displacement of the bearing and / or the bearing gland relative to the bridge after the gland bolts are stretched is obtained by measuring the assembly.

[0024] In one of the embodiments, after the gland bolts are extended, the extension of the gland bolts is measured by a distance measuring member, and the gland nuts on each gland bolt are tightened.

[0025] In one embodiment, two sets of the measuring components are used to simultaneously measure the displacement of the bearing and the bearing cover relative to the opposite sides of the bridge, and an average value of the two displacements is taken.

[0026] The above-mentioned measuring device provides driving force to the stretching assembly through the driving member to drive the stretching assembly to stretch the gland bolt. During the stretching process, the stretching assembly will cause the bearing gland and the bearing to deform, and then the displacement of the bearing gland and / or the bearing relative to the bridge is measured by the measuring assembly to obtain the tightening force of the bearing gland on the bearing. In this way, by disassembling and assembling the measuring device on the gland bolt, the bearing gland can be reinstalled while measuring the tightening force of the bearing gland on the bearing, avoiding measuring the tightening force first and then reinstalling, simplifying the measurement steps, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a front view of a bearing assembly in the related art;

[0028] Figure 2 A schematic diagram of a top view of a bearing assembly in the related art;

[0029] Figure 3 for Figure 1 A schematic diagram of the front view of the middle bearing gland;

[0030] Figure 4 for Figure 1 A schematic diagram of a top view of the middle bearing gland;

[0031] Figure 5 for Figure 1 Schematic diagram of the middle gland bolt and gland nut at an angle;

[0032] Figure 6 for Figure 1 Schematic diagram of the middle gland bolt and gland nut from another angle;

[0033] Figure 7 It is a schematic diagram of the installation of the measuring device of the present invention;

[0034] Figure 8 It is an enlarged schematic diagram of a part of the structure of the measuring device of the present invention;

[0035] Fig. 9 A schematic diagram of a front view of a tensile member of a measuring device of the present invention;

[0036] Fig.10 is a schematic diagram of a top view of a tensile member of a measuring device of the present invention;

[0037] Fig.11 A schematic diagram of a front view of a stretching nut of a measuring device of the present invention;

[0038] Fig.12 A schematic diagram of a top view of a stretching nut of a measuring device of the present invention;

[0039] Fig.13 A schematic diagram of a front view of a bridge of a measuring device of the present invention;

[0040] Fig.14 It is a schematic diagram of a left view of the bridge of the measuring device of the present invention.

[0041] Fig.15 A schematic diagram of a front view of a gasket ring of a measuring device of the present invention;

[0042] Fig.16 is a schematic diagram of a top view of a gasket ring of a measuring device of the present invention;

[0043] Fig.17 It is a schematic diagram of the flow of the measurement method in the present invention.

[0044] Description of Figure Numbers:

[0045] 100. Measuring device; 110. Tensile assembly; 111. Tensile member; 112. Tensile nut; 120. Bridge; 121. Connecting hole; 130. Measuring assembly; 131. Measuring member; 132. Mounting seat; 140. Washer ring; 141. Groove; 210. Bearing cover; 220. Bearing; 221. Upper bearing; 222. Lower bearing; 230. Cover bolt; 240. Cover nut; 250. Bearing box. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0052] Before describing the measuring device 100 of the present application in detail, a brief description is first given of the workpiece to be measured by the measuring device 100 of the present application and the related measuring method.

[0053] Figure 1 A schematic diagram showing a front view of a bearing assembly in the related art is shown, Figure 2 A schematic diagram showing a top view of a bearing assembly in the related art is shown, Figure 3 Shows Figure 1 Schematic diagram of the front view of the middle bearing gland, Figure 4 Shows Figure 1 Schematic diagram of the top view of the middle bearing gland, Figure 5 Shows Figure 1 Schematic diagram of the middle gland bolt and gland nut at an angle. Figure 6 Shows Figure 1 Schematic diagram of the middle gland bolts and gland nuts from another angle.

[0054] The measuring device 100 provided in the present application is used to measure the tightening force of the bearing gland 210 on the bearing 220. Figure 1 and Figure 2 , and combined with Figure 3 and Figure 4 A plurality of gland bolts 230 are respectively inserted into the bearing gland 210 at intervals to install the bearing gland 210 on the bearing box 250. Figure 5 and Figure 6 Each gland bolt 230 is also provided with a gland nut 240, which is used to fasten the bearing gland 210. The bearing 220 includes an upper bearing 221 and a lower bearing 222 connected to each other, and the upper bearing 221 and the lower bearing 222 are respectively installed in the cavities opened by the bearing gland 210 and the bearing box 250, that is, the bearing 220 is located between the bearing gland 210 and the bearing box 250.

[0055] In the relevant technology, since the bearing cover 210 and the bearing 220 are interference fit, it is necessary to first install a gasket on the cover bolt 230 during measurement, and then place a lead wire directly above the bearing 220 and on the gasket of the cover bolt 230, and reinstall and tighten the cover bolt 230 of the bearing cover 210 according to the normal reinstallation steps. When the elongation of the cover bolt 230 reaches the standard, the cover bolt 230 is removed, the bearing cover 210 is lifted, the gasket and the lead wire are taken out, and the tightening force of the bearing cover 210 on the bearing 220 is measured and calculated. After passing the test, it can be reinstalled according to the normal reinstallation steps.

[0056] It should be noted that the tightening force mentioned in this application does not refer to the force mentioned in mechanics, nor does it refer to the preload force, but to the size. Specifically, it refers to the interference fit size between the bearing cover 210 and the top of the bearing 220 after the cover bolt 230 is tightened to the standard torque (the standard torque is the torque value specified by the manufacturer).

[0057] Figure 7 The installation diagram of the measuring device of the present invention is shown. Figure 8 An enlarged schematic diagram showing a partial structure of the measuring device of the present invention.

[0058] See also Figure 7 and Figure 8The present application provides a measuring device 100 for measuring the tightening force of a bearing cover 210 on a bearing 220. The measuring device 100 includes a stretching assembly 110, a driving member (not shown in the figure), a bridge 120 and a measuring assembly 130. The driving member can provide the stretching assembly 110 with the driving force required for stretching. Under the action of the driving force, the stretching assembly 110 can stretch the cover bolts 230. The elongation of the cover bolts 230 can drive the bearing cover 210 and the bearing 220 to deform. After sequentially stretching and measuring multiple cover bolts 230, the reading of the measuring assembly 130 is obtained, and the reading is the tightening force of the bearing cover 210 on the bearing 220.

[0059] In this way, during the reinstallation of the bearing cover 210, the deformation of the bearing cover 210 and the bearing 220 is measured by the measuring device 100, so as to obtain the tightening force of the bearing cover 210 on the bearing 220. No additional disassembly and lead wire pressing is required, which simplifies the process of measuring the tightening force, reduces the reinstallation work of the bearing cover 210 and the corresponding lifting work once, and saves time and resources.

[0060] Fig. 9 A schematic diagram showing a front view of a tensile member of a measuring device according to the invention, Fig.10 A schematic diagram showing a top view of a tensile member of a measuring device according to the invention, Fig.11 A schematic diagram showing a front view of a stretching nut of a measuring device according to the present invention, Fig.12 A schematic diagram showing a top view of a tension nut of a measuring device according to the invention.

[0061] Please continue reading Figure 8 The tensioning assembly 110 is detachably sleeved on the outer side of the gland bolt 230 along the circumferential direction and is located on the side of the bearing gland 210 away from the bearing box 250. In this way, the tensioning assembly 110 stretches the gland bolt 230 under the action of the driving member to measure the tightening force of the bearing gland 210 on the bearing 220.

[0062] Specifically, the stretching assembly 110 includes a stretching member 111 and a stretching nut 112. Figure 8 , and see Figures 9 to 12 The tensioning member 111 is sleeved on the outside of the portion of the gland bolt 230 that exceeds the gland nut 240, and the tensioning nut 112 is sleeved on the outside of the gland bolt 230 along the circumferential direction and is located above the tensioning member 111 in the vertical direction, and the upper surface of the tensioning member 111 in the vertical direction abuts against the lower surface of the tensioning nut 112 in the vertical direction. The tensioning nut 112 and the gland bolt 230 are threadedly connected.

[0063] In a preferred embodiment, the stretching member 111 is a hydraulic jack, the driving member is a pneumatic hydraulic pump, and the output end of the pneumatic hydraulic pump is connected to the hydraulic jack to provide driving force for the hydraulic jack.

[0064] In this way, the pneumatic hydraulic pump is started and can drive the hydraulic jack to work. Since the stretching bolt 112 is tightened on the end of the gland bolt 230 away from the bearing box 250, when the hydraulic jack is working, the hydraulic jack indirectly stretches the gland bolt 230 by pushing the stretching bolt 112 to move, and measures the stretching amount through the measuring component 130, thereby calculating the tightening force of the bearing gland 210 on the bearing 220, avoiding multiple lifting of the bearing gland 210 and the work of pressing the lead wire, thereby improving the measurement efficiency.

[0065] Fig.13 A schematic diagram showing a front view of a bridge of a measuring device according to the present invention, Fig.14 A schematic diagram of a left side view of the bridge of the measuring device of the present invention is shown.

[0066] See also Fig.13 and Fig.14 The bridge 120 is generally in an inverted "U" shape. The bridge 120 is fixedly mounted on the bearing box 250, and the bridge 120 and the bearing gland 210 are located on the same side of the bearing box 250. The bridge 120 is provided with connecting holes 121 at opposite ends along its length direction, and fasteners are passed through the connecting holes 121 to mount the bridge 120 on the bearing box 250.

[0067] In this way, when the stretching assembly 110 stretches the pressure cover bolt 230, the pressure cover bolt 230 no longer applies force to the bearing pressure cover 210. The pressure cover bolt 230 will cause the bearing pressure cover 210 and the bearing 220 to deform and gradually restore their free state. At this time, the bridge 120 fixedly installed on the bearing box 250 can be used as a static reference point to measure the displacement of the bearing pressure cover 210 and the bearing 220 relative to the bridge 120, and then obtain the tightening force of the bearing pressure cover 210 on the bearing 220.

[0068] See again Figure 4 The measuring assembly 130 is mounted on the bearing 220 and / or the bearing cover 210, and is used to measure the displacement of the bearing cover 210 and / or the bearing 220 relative to the bridge 120. Specifically, the measuring assembly 130 includes a measuring piece 131 and a mounting seat 132, the mounting seat 132 is mounted on an outer side of the bearing 220 and / or the bearing cover 210 along its own thickness direction, and the two mounting seats 132 are located on the side where the bridge 120 is provided, one end of the measuring piece 131 is mounted on the mounting seat 132, and the other end of the measuring piece 131 contacts the side of the bridge 120 away from the bearing box 250. Optionally, the measuring piece 131 is a dial indicator, and the mounting seat 132 is a magnetic gauge seat.

[0069] In this way, when the tensioning assembly 110 stretches the pressure cover bolt 230, the measuring piece 131 can measure the displacement of the bearing pressure cover 210 and / or the bearing 220 relative to the bridge 120. The displacement is the tightening force of the bearing pressure cover 210 on the bearing 220, and the measurement process is simple.

[0070] In some embodiments, the measuring device 100 includes two sets of measuring components 130. The two sets of measuring components 130 are respectively installed on the bearing 220 and the bearing gland 210, and the two sets of measuring components 130 are respectively pointed upward / downward in the vertical direction toward the side of the bridge 120 away from the bearing box 250.

[0071] Please note that Figure 7 The probes of the two measuring members 131 contact opposite sides of the bridge 120 in the vertical direction respectively.

[0072] In this way, the two groups of measuring components 130 respectively measure the displacement changes of the bearing 220 and the bearing cover 210 in the up and down directions relative to the bridge 120 when the cover bolt 230 is stretched upward, and then the tightening force of the bearing cover 210 on the bearing 220 can be obtained by calculating the average value of the readings of the two groups of measuring components 130. Setting two groups of measuring components 130 can improve the accuracy of the measurement results.

[0073] In other optional embodiments, the measuring component 130 may also select one of the above two groups.

[0074] Fig.15 A schematic diagram showing a front view of a backing ring of a measuring device according to the invention, Fig.16 A schematic diagram showing a top view of a backing ring of a measuring device according to the invention.

[0075] See also Fig.15 and Fig.16 In some embodiments, the measuring device 100 further includes a gasket 140. The gasket 140 is generally annular in shape. Figure 8 As shown, the gasket 140 is sleeved on the outer side of the gland nut 240 along the circumferential direction and is located between the bearing gland 210 and the stretching member 111, that is, the gasket 140 is respectively abutted against the bearing gland 210 and the stretching member 111 on opposite sides in the vertical direction. A groove 141 is provided on the outer circumferential side of the gasket 140 and penetrates to its inner side surface, that is, the groove 141 penetrates the gasket 140 along the diameter direction of the gasket 140, and the groove 141 does not penetrate the gasket 140 along the axial direction of the gasket 140. Among them, the groove 141 can be used to provide a screwing space for the gland nut 240.

[0076] In this way, the backing ring 140 can prevent the tensioning assembly 110 from directly contacting the bearing gland 210 and causing damage to the bearing gland 210 , and a wrench can be inserted into the groove 141 to tighten or loosen the gland nut 240 .

[0077] In some embodiments, the measuring device 100 further includes a distance measuring member (not shown in the figure), which is used to measure the elongation of the gland bolt 230 under the action of the external force applied by the tension assembly 110. Specifically, the distance measuring member can be any tool capable of measuring dimensions, such as a caliper and a dial indicator. The distance measuring member measures the elongation of the gland bolt 230 under the action of the standard torque applied by the tension assembly 110, which is the standard length of the gland bolt 230.

[0078] It should be noted that in the present application, after the bearing gland 210 and the bearing 220 are installed in the bearing box 250 through the gland bolts 230 and the gland nuts 240, since it is difficult for the operator to tighten the gland nuts 240 by hand during installation, there will be an installation gap after installation, and the installation gap will affect the measurement result of the tightening force of the bearing gland 210 on the bearing 220. Therefore, before measuring the tightening force, it is necessary to eliminate the installation gap first, start the driving part, and when the force provided by the driving part reaches the pre-tightening force of the bearing 220, tighten the gland nut 240 with a wrench or other tools to eliminate the above-mentioned installation gap. After the tension assembly 110 is depressurized, the two sets of measuring assemblies 130 are reset to zero or the current readings are recorded.

[0079] Fig.17 A schematic flow chart of the measuring method of the present invention is shown.

[0080] See also Fig.17 The present application also provides a measurement method, using the above-mentioned measuring device 100 to measure the tightening force of the bearing gland 210 on the bearing 220, the measurement method comprises the following steps:

[0081] S110, installing the bridge 120 on the bearing box 250, and installing the measuring assembly 130 on the bearing 220 and / or the bearing gland 210;

[0082] Specifically, before measuring the tightening force of the bearing gland 210 on the bearing 220, the bridge 120 is first installed on the bearing box 250, and the measuring assembly 130 is installed on the bearing 220 or the bearing gland 210. When there are two sets of measuring assemblies 130, the two sets of measuring assemblies 130 are respectively installed on the bearing 220 and the bearing gland 210, and the two sets of measuring assemblies 130 are arranged opposite to each other for contacting the opposite sides of the bridge 120.

[0083] S120, applying a pre-tightening force to the gland bolts 230 through the stretching assembly 110 so that the gland bolts 230 extend in a direction away from the bearing box 250;

[0084] Specifically, the gasket 140, the tensioning member 111 and the tensioning nut 112 are sequentially mounted on the tensioning bolt 230, and a driving force is provided to the tensioning member 111 by a driving member, so that the driving member applies a pre-tightening force to the gland bolt 230 through the tensioning nut 112, thereby extending the gland bolt 230 away from the bearing box 250, and then tightening the gland nut 240, and zeroing the measuring assembly 130.

[0085] In this way, by applying a pre-tightening force to the gland bolts 230, the installation gaps between the bearing gland 210, the bearing 220 and the bearing box 250 can be eliminated. When there are two measuring assemblies 130, the two measuring assemblies 130 need to be zeroed.

[0086] It should be noted that in step S120, the measuring component 130 will obtain an indication. In order to facilitate the subsequent measurement of the tightening force of the bearing cover 210 on the bearing 220, the measuring component 130 is adjusted to zero. If it is not adjusted to zero, the subsequent measurement of the tightening force of the bearing cover 210 on the bearing 220 needs to be calculated based on the indication of the measuring component 130, which makes the calculation process complicated.

[0087] S130, obtaining, by the measuring assembly 130, a displacement of the bearing 220 and / or the bearing gland 210 relative to the bridge 120 after the gland bolt 230 is stretched;

[0088] Specifically, after the gland bolt 230 is stretched to the elongation by the stretching assembly 110, the gland nut 240 is tightened, and the indication of the measuring assembly 130 is obtained to obtain the displacement of the bearing 220 and / or the bearing gland 210 relative to the bearing box 250, thereby obtaining the tightening force of the bearing gland 210 on the bearing 220; wherein, when measuring the tightening force of the bearing gland 210 on the bearing 220, the elongation of the gland bolt 230 is set, and when the stretching assembly 110 applies a standard force to the gland bolt 230 When the torque is applied, the stretched length of the gland bolt 230 is the set elongation of the gland bolt 230, and the standard length is the elongation of the gland bolt 230; that is, when measuring the tightening force of the bearing gland 210 on the bearing 220, a standard torque is set, and the standard torque corresponds to the standard length of the gland bolt 230. After the standard torque is applied to the gland bolt 230 by the stretching assembly 110 and the gland bolt 230 is stretched to the standard length, the gland nut 240 is tightened to complete the reinstallation of the bearing 220.

[0089] When the measuring component 130 is a group, after the tensile component 110 stretches the pressure cover bolt 230 to the standard length, the reading of the measuring piece 131 is obtained, and the reading is the tightening force of the bearing pressure cover 210 on the bearing 220; when there are two measuring components 130, after the tensile component 110 stretches the pressure cover bolt 230 to the standard length, the readings of the two measuring pieces 131 are obtained, and the average value of the two readings is calculated, and the average value is the tightening force of the bearing pressure cover 210 on the bearing 220.

[0090] It should be noted that, in the process of the stretching component 110 stretching the cover bolt 230, the cover bolt 230 is subjected to the tensile force and drives the bearing cover 210 and the bearing 220 to deform, so that the bearing cover 210 and the bearing 220 can respectively produce a displacement change relative to the bridge 120, and the reading of the measuring component 130 is the displacement change. When there is only one measuring component 130, the reading of the measuring component 130 is the tightening force of the bearing cover 210 on the bearing 220. When there are two measuring components 130, the average of the two readings is the tightening force of the bearing cover 210 on the bearing 220.

[0091] In some embodiments, before applying a pre-tightening force to the gland bolt 230 through the stretching assembly 110 to extend the gland bolt 230 away from the bearing box 250, it also includes: installing the bearing 220 and the bearing gland 210 on the bearing box 250 through the gland bolt 230 and the gland nut 240.

[0092] In some embodiments, the measuring device 100 further includes a distance measuring member; after the gland bolts 230 are extended, the extension of the gland bolts 230 is measured by the distance measuring member, and then the gland nuts 240 on each gland bolt 230 are tightened.

[0093] In some embodiments, there are multiple gland bolts 230 and gland nuts 240, and the multiple gland bolts 230 and the multiple gland nuts 240 correspond to each other one by one, and the multiple gland bolts 230 are centrally symmetrical with respect to the center of the bearing gland 210; after the gland bolts 230 are stretched to the standard length by the stretching assembly 110, tightening the gland nuts 240 specifically includes: taking two gland bolts 230 centrally symmetrically distributed with respect to the center of the bearing gland 210 as a group, stretching each group of gland bolts 230 in turn by the stretching assembly 110, and when each gland bolt 230 is stretched to the standard length, tightening the corresponding gland nut 240.

[0094] In this way, by sequentially stretching the two gland bolts 230 of each group that are symmetrically distributed, it is possible to ensure that the bearing gland 210 and the bearing box 250 are fixed more evenly, thereby avoiding the jamming phenomenon due to unevenness.

[0095] In summary, the present application provides a measuring device 100 and a measuring method. The measuring device 100 stretches the gland bolt 230 through the stretching assembly 110, and measures and calculates the tightening force of the bearing gland 210 on the bearing 220 through the measuring assembly 130, without the need for additional disassembly and lead wire pressing, thereby simplifying the process of measuring the tightening force. At the same time, it also reduces the reinstallation work of the bearing gland 210 and the corresponding lifting work, saving time and resources. In addition, the stretching assembly 110 can also eliminate the installation gap between the bearing gland 210 and the bearing 220, further improving the reinstallation efficiency.

[0096] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A measuring device for measuring the tightening force of a bearing gland on a bearing, wherein the bearing gland is installed on a bearing housing through gland bolts and gland nuts, and the bearing is disposed between the bearing gland and the bearing housing. Characterized in that, The measuring device comprises: A stretching assembly detachably sleeved on the outer side of the gland bolt in the circumferential direction and located on the side of the bearing gland away from the bearing housing, the stretching assembly being configured to apply an external force to the gland bolt to cause the gland bolt to elongate in a direction away from the bearing housing; A driving member connected to the stretching assembly for providing a driving force for the stretching assembly; A bridge fixedly installed on the bearing housing; and A measuring assembly installed on the bearing and / or the bearing gland for measuring the displacement of the bearing and / or the bearing gland relative to the bridge; wherein, the measuring assembly includes a measuring member and a mounting seat; the mounting seat is fixedly installed on the bearing and / or the bearing gland, and one end of the measuring member is installed on the mounting seat, and the other end of the measuring member contacts the bridge.

2. The measuring device according to claim 1, Characterized in that, The measuring device further includes a spacer ring; The spacer ring is sleeved on the outer side of the gland nut in the circumferential direction and located between the bearing gland and the stretching assembly.

3. The measuring device according to claim 2, Characterized in that, A groove penetrating through to its inner side surface is formed on the outer peripheral side of the spacer ring.

4. The measuring device according to claim 2, Characterized in that, The stretching assembly includes a stretching member and a stretching nut; The stretching member is sleeved on the outer side of the gland bolt, and the stretching nut is sleeved on the gland bolt and located on the side of the stretching member away from the bearing housing; The driving member is connected to the stretching member for providing a driving force for the stretching member.

5. The measuring device according to claim 1, Characterized in that, There are two sets of the measuring assemblies, one set of the measuring assemblies is installed on the bearing, and the other set of the measuring assemblies is installed on the bearing gland, and the two sets of the measuring assemblies are arranged oppositely for contacting the opposite sides of the bridge.

6. The measuring device according to any one of claims 1 to 5, Characterized in that, The measuring device further includes a distance measuring member for measuring the elongation of the gland bolt under the action of the external force applied by the stretching assembly.

7. A measuring method, Characterized in that, The measuring method uses the measuring device according to any one of claims 1 to 6; the measuring method includes the following steps: Install the bridge on the bearing housing and install the measuring assembly on the bearing and / or the bearing gland; Apply a pre-tightening force to the gland bolt through the stretching assembly to cause the gland bolt to elongate in a direction away from the bearing housing; Obtain the displacement of the bearing and / or the bearing gland relative to the bridge after the gland bolt is stretched through the measuring assembly.

8. The measuring method according to claim 7, Characterized in that, After the gland bolts are elongated, the elongation of the gland bolts is measured by a distance measuring component, and the gland nuts on each of the gland bolts are tightened.

9. The measuring method according to claim 7 or 8, characterized in that two sets of the measuring components are used to simultaneously measure the displacement amounts of the relative two sides of the bearing and the bearing gland relative to the bridge, and the average value of the two sets of the displacement amounts is taken.

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