CN214308592U - Magnetic measuring head mounting structure suitable for concentric measuring device of unit - Google Patents
Magnetic measuring head mounting structure suitable for concentric measuring device of unit Download PDFInfo
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- CN214308592U CN214308592U CN202022835881.2U CN202022835881U CN214308592U CN 214308592 U CN214308592 U CN 214308592U CN 202022835881 U CN202022835881 U CN 202022835881U CN 214308592 U CN214308592 U CN 214308592U
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Abstract
The utility model discloses a magnetic measuring head mounting structure suitable for a unit concentric measuring device, which comprises a tail rod rear section, a magnet and a measuring head, wherein the tail rod rear section is provided with a blind hole-shaped magnet placing hole along an axis; the measuring head comprises a measuring head fixing part, a measuring head supporting part and a magnet placing area; the measuring head fixing part can be fixedly connected with the rear section of the tail rod; the measuring head fixing part is provided with a magnet placing area communicated with the magnet placing hole; the magnet is placed in a hole formed by splicing the magnet placing hole and the magnet placing area, one end of the magnet is abutted against the closed end of the magnet placing hole, the other end of the magnet is provided with a spherical raised head, the bottom of the spherical raised head is abutted against the step surface of the through hole and the internal thread connecting hole, and the top point of the spherical raised head protrudes out of the through hole. Therefore, the utility model discloses a mode of magnetism is general the concentric measuring device of unit install in the position department that awaits measuring.
Description
Technical Field
The utility model relates to a magnetism gauge head mounting structure suitable for concentric measuring device of unit.
Background
In the process of installing and overhauling the unit, the vertical concentricity of the fixed part is generally measured by using an electric loop method and a unit vertical concentricity measuring device as shown in figure 1. This unit perpendicular concentric measuring device includes: reference component 1 ', core-setter 2', battery 3 ', earphone 4', measured component 5 ', internal micrometer 6', piano wire 7 ', heavy hammer 8', oil drum 9 ', and core-setter support 10'.
During measurement, one end of a measuring rod of the inside micrometer 6 ' is closely attached to a measuring point of the measured component 5 ', and a measuring head at the other end is aligned with the piano wire 7 ' to do up-down, left-right circular motion. When a tiny "chuck" current sound is emitted from the earphone, the inside micrometer 6 'is shortened by 0.01-0.02 mm, at the moment, the measuring point is silent, then the inside micrometer 6' is adjusted back to the reduced front size, if the current sound can be heard again, the measuring point can be judged to be the minimum point, the value is recorded, and the minimum point is filled in a corresponding frame of the concentric measurement recording table. When the unit vertical concentric measuring device is used for vertical concentric measurement of a measuring point of a component to be measured, three persons should perform measurement each time, one person holds the inside micrometer 6', one person wears an earphone for measurement, one person records, and in order to ensure that measured data are accurate, the same person should perform measurement in different directions in each measurement.
When the unit perpendicularity is measured, the inner diameter of a stator of the large-sized water pump unit is often more than 2 meters due to the difference of the sizes of the units. If the unit vertical concentric measuring device is adopted to measure the verticality of a large-sized water pump unit with a large diameter (the diameter D is more than 2 meters), the connecting rod needs to be spliced at the end part of the measuring rod of the inside micrometer, the measuring error is increased if the connecting rod is not screwed down during splicing,
the internal micrometer connects the pole more, if fail to screw up during the concatenation will increase measuring error, the natural disturbance degree of chi pole also is the cause of the production error that can not neglect. Meanwhile, the inside micrometer which reaches the measuring range is high in price, large in weight after splicing, inconvenient to measure and use and easy to bring measuring errors.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art not enough, provide a magnetism gauge head mounting structure suitable for concentric measuring device of unit to when measuring, the mode of inhaling through the magnetism will concentric measuring device of unit install in the position department that awaits measuring.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
the utility model provides a magnetism gauge head mounting structure suitable for concentric measuring device of unit, includes tail-bar back end, magnet and gauge head, wherein:
the rear section of the tail rod is provided with a blind hole-shaped magnet placing hole along the axis;
the measuring head comprises a measuring head fixing part, a measuring head supporting part and a magnet placing area; the measuring head fixing part can be fixedly connected with the rear section of the tail rod; the measuring head fixing part is provided with a magnet placing area communicated with the magnet placing hole;
the magnet is placed in a hole formed by splicing the magnet placing hole and the magnet placing area, one end of the magnet is abutted against the closed end of the magnet placing hole, the other end of the magnet is provided with a spherical raised head, the bottom of the spherical raised head is abutted against the step surface of the through hole and the internal thread connecting hole, and the top point of the spherical raised head protrudes out of the through hole.
The measuring head fixing part is provided with an internal thread connecting hole matched with the rear-section external thread connecting section, and meanwhile, after the internal thread connecting hole is in threaded fit connection with the rear-section external thread connecting section, a magnet placing area communicated with the split section b exists;
preferably, the tail rod rear section is fixedly connected with an internal thread connecting hole arranged at a corresponding position on the measuring head fixing part through a rear section external thread connecting section arranged close to the end part, and meanwhile, the internal thread connecting hole is in threaded fit connection with the rear section external thread connecting section, and then a magnet placing area communicated with the magnet placing hole exists.
Preferably, the closed end of the magnet placing hole abuts against the rear-section connecting internal thread hole, and the open end of the magnet placing hole penetrates through the end face of the rear-section external thread connecting section.
Preferably, the magnet placing hole is a stepped hole and comprises two divided sections, namely a divided section a and a divided section b; the split section a is arranged close to the rear section connecting internal thread hole, the split section b penetrates through the rear section external thread connecting section, and the inner diameter of the split section a is larger than that of the split section b.
Preferably, the magnet is a neodymium iron boron magnet.
According to the above technical scheme, can understand the utility model discloses following beneficial effect has:
the utility model discloses a magnetism gauge head mounting structure to through gauge head location measurement station, the position can be more accurate, behind the fixed measurement station, can need not artificial intervention, can execute the survey. Therefore, not only is one labor for the work reduced, but also the measurement accuracy is improved, and certain cost is saved.
Drawings
FIG. 1 is a schematic structural diagram of a conventional unit vertical concentric measuring device;
in fig. 1: 1' -a reference member; 2' -core finder; 3' -a battery; 4' -earphone; 5' -a component to be measured; 6' -inside micrometer; 7' -piano wire; an 8' heavy hammer; 9' -oil drum; 10' -a core setter scaffold;
fig. 2 is a schematic structural diagram of the unit concentric measuring device according to the present invention;
in fig. 2: 1-differential head ruler frame; 2-number micro-tapping; 3-level bubble extension rod assembly; 4-middle connecting rod; 51-tail rod front section; 52-tail rod rear section assembly; 6-measuring a head; 7-bracket.
FIG. 3 is a schematic structural view of the front section of the tail rod of FIG. 2;
FIG. 3: 51-tail rod front section; 511-front segment connector a; 512-front section connector b;
FIG. 4 is a schematic structural view of the rear section of the tail rod of FIG. 2;
FIG. 4: 52-rear section of tail rod; 521-magnet placement holes; 522-rear section connecting blind hole; 523-a rear section external thread connecting section;
FIG. 5 is a schematic view of the probe of FIG. 2;
FIG. 5: 61-a probe fixing part; 62-a stylus supporting portion; 63-a magnet placement area;
FIG. 6 is a schematic view of the structure of the bracket of FIG. 2;
FIG. 6: 71-a chassis; 72-arc bracket.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless specifically stated otherwise, the relative arrangement of the components and steps, expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations).
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, for the purpose of convenience of description, the vertical direction, the transverse direction and the longitudinal direction are perpendicular to each other, and the two directions in the vertical direction are up and down directions respectively.
As shown in fig. 2, a concentric measuring device of unit is disclosed, connect pole subassembly, centre and connect pole 4, tail-stock, magnet, gauge head 6 and bracket 7 including differential head chi frame 1, digital display differential head 2, level bubble, the tail-stock includes tail-stock anterior segment 51, tail-stock back end 52, tail-stock back end, magnet and gauge head constitution cost utility model magnetic gauge head mounting structure, wherein:
the differential head ruler frame 1, as shown in fig. 1, comprises a ruler frame arranged in a U shape, the ruler frame comprises two side arms and a connecting bottom frame connected between the two side arms, the two side arms are respectively a side arm a and a side arm b, a differential head fixing hole is arranged on the side arm a, a ruler frame connecting hole is arranged on the side arm b, and the differential head fixing hole and the ruler frame connecting hole are coaxially arranged; the connecting underframe is arranged at one axial side to form a grip through the rectangular hole, so that the grip is convenient to grip during measurement. And a leveling bubble mounting hole is formed in the other side of the connecting underframe in the axial direction, and a leveling bubble a is assembled in the leveling bubble mounting hole.
Level bubble connect pole subassembly 3, including connecting pole and level bubble b, the one end of connecting the pole sets up the fastener mounting hole, the other end then sets up threaded connection head, and connects the pole and go up the level and be provided with the level bubble groove, this level bubble groove is the V-arrangement setting, level bubble b inlays the dress in the level bubble groove. The fastening piece is respectively connected with the connecting hole of the ruler frame and the mounting hole of the fastening piece so as to connect and fix the connecting rod on the micrometer frame.
As shown in fig. 3, two ends of the tail rod front section 51 are respectively provided with a connector, wherein one connector is a front section connector a, and the other connector is a front section connector b; the front section connector a and the front section connector b are both external thread connecting sections.
As shown in fig. 4, the two ends of the rear section of the tail rod are respectively provided with a connecting part, wherein the connecting part at one end is a rear section connecting internal thread hole, and the connecting part at the other end is a rear section external thread connecting section; meanwhile, the rear section of the tail rod is provided with a magnet placing hole along the axis, the magnet placing hole is a blind hole, specifically, the closed end of the magnet placing hole is abutted against the rear section connecting internal thread hole, the open end of the magnet placing hole penetrates through the end face of the rear section external thread connecting section, and meanwhile, the magnet placing hole is a stepped hole and comprises two body sections which are respectively a split section a and a split section b; the split section a is arranged close to the rear section connecting internal thread hole, the split section b penetrates through the rear section external thread connecting section, and the inner diameter of the split section a is larger than that of the split section b.
The gauge head, as shown in fig. 5, includes that gauge head fixed part, gauge head supporting part and magnet place the district, the gauge head fixed part is provided with the female connection hole that matches with back end external screw thread linkage section, simultaneously, female connection hole after being connected with back end external screw thread linkage section screw-thread fit, there is the magnet that runs through with the components of a whole that can function independently section b in magnet hole and places the district, the gauge head supporting part is provided with the through-hole that places the district intercommunication with magnet along the axial, the internal diameter of through-hole is less than the internal diameter of the female connection hole of gauge head fixed part.
The magnet is placed in a hole formed by splicing the magnet placing hole and the magnet placing area, one end of the magnet is abutted against the closed end of the magnet placing hole, the other end of the magnet is provided with a spherical raised head, the bottom of the spherical raised head is abutted against the step surface of the through hole and the internal thread connecting hole, and the top point of the spherical raised head protrudes out of the through hole.
The bracket comprises a bottom frame and an arc-shaped bracket arranged above the bottom frame, wherein the arc-shaped bracket is arranged in a semicircular shape.
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
When a large-scale unit is installed and overhauled to carry out unit vertical concentric measurement, the tail of a measuring tool is always positioned at a relatively rough technological level, although a specially-assigned ruler is used, the area of a positioning point is large, the surface of a workpiece, particularly the surface of a stator silicon steel sheet, is uneven, the same point of measurement is easily caused, and an error of about 0.1mm occurs. Similarly, the time is needed for finding points and the ruler body moves, so that a ruler holding person is easy to fatigue, the displacement of a measuring point at the contact position of the ruler rod and the stator is easy to cause measurement deviation. The final result of the concentric measurement of the unit directly influences the air gap after the unit is installed, whether the magnetic field center data is qualified or not and the subsequent installation work of the unit.
The novel tail rod is designed by arranging the neodymium iron boron strong magnet in a tail rod rear section arranging hole, arranging the part in a special measuring head hole, processing a piece of neodymium iron boron magnet single surface with the size of 8 multiplied by 5mm to be an SR4 spherical surface, fixing the special measuring head by using the special measuring head, and attracting the surface of a measured part (stator core) through a strong magnetic field. Meanwhile, the magnetic gauge stand is attracted to the surface of a part to be measured (a stator core), the lower part of a measuring point is clamped by the special bracket, and the measuring rod is supported close to the tail part. Therefore, the suction force is arranged on the axis, the measuring contact can move up and down, left and right, and the bracket supports the measuring rod in the vertical direction, so that the measuring rod can accurately move around the measuring point in a limited manner. The material of the ruler rod is made of non-ferromagnetic material, so that measurement errors caused by magnetized attraction of the micro head on the piano wire are avoided, and the specific material type selection is shown in the section 4 of tool material type selection and related parameter parts.
After the tail rod and the bracket are applied, 33% of labor can be reduced when the unit is concentrically measured, and certain economic benefit is generated.
The middle connecting rod adopts a hollow design in consideration of the weight factor of the measuring rod of the large-scale unit, so that the total mass of the light connecting rod is ensured while the strength is ensured.
The micro head ruler frame, the middle connecting rod, the tail rod, the bracket and accessories are all made of 7075 aluminum alloy, and the micro head ruler has the advantages that: high strength, good mechanical property, strong corrosion resistance, easy processing, good wear resistance, and difficult magnetization of non-ferromagnetic materials.
7075 the aluminum alloy is non-ferromagnetic material, not easy to magnetize, and avoids the problem that the piano wire is attracted in the measurement process by differential head magnetization. The bracket is connected with the magnetic gauge stand (measuring head supporting part) in the same way, and the movement resistance generated by magnetization is avoided when the contact head is measured after contact and magnetization.
The tail rod adopts a combined mode, neodymium iron boron (N38) material is placed in the middle, a special measuring contact (measuring head) is used for generating suction force, the tail rod is attached to a measured component, the magnets are cylinders with the diameter of 10 multiplied by 10mm, and 5 pieces form a group; 8X 5mm cylinders, 5 pieces are a second group, one of which is machined on one side into SR4 circular arcs.
The actually measured tension of the tail rod after being manufactured through a static tension experiment is as follows: 1.28 kg; the suction force of the tail rod measuring contact (measuring head) is only balanced with extremely small tension in the horizontal direction, and the use condition is met during actual test.
Support bracket design
The bracket is made of 7075 aluminum alloy material and is fixed by matching with the magnetic gauge stand and the gauge rod. The bracket opening with the thickness of 1mm can be freely adjusted through the magnetic gauge stand and the gauge rod, is close to the measuring contact (fulcrum force arm 5.5 mm), plays a good supporting role in the fine adjustment movement of the measuring rod, and simultaneously reduces the movement resistance to the minimum. This point is subject to the extremely small mass from the rod itself and the force applied by the person during fine downward adjustment. Since the attraction force of the magnetic gauge stand is normally 40kg, the force calculation at this point can be ignored.
Measuring the coaxiality of the measuring rod
After the whole pole is assembled (assembled according to the length of a ruler matched with one-station management), the coaxiality deviation of the whole pole is measured to be less than 0.01 mm; the numerical value of the extension rod of the measuring tool is required by the scale, and the numerical value is not counted in the calculation process, so the precision and strict requirement are not met; when the small aperture is measured, the combination of the ruler frame and the screw hole of the leveling bubble connecting rod meets the national standard.
Level bubble
The leveling bubble plays an auxiliary role in the measuring tool, the requirement on the leveling bubble is not high, a cylindrical leveling bubble is adopted in the measuring tool, and when the leveling bubble is required to be combined, the axis of the leveling bubble is horizontal to the axis of the ruler rod.
Claims (5)
1. The utility model provides a magnetism gauge head mounting structure suitable for concentric measuring device of unit which characterized in that, includes tail-bar back end, magnet and gauge head, wherein:
the rear section of the tail rod is provided with a blind hole-shaped magnet placing hole along the axis;
the measuring head comprises a measuring head fixing part, a measuring head supporting part and a magnet placing area; the measuring head fixing part can be fixedly connected with the rear section of the tail rod; the measuring head fixing part is provided with a magnet placing area communicated with the magnet placing hole;
the magnet is placed in a hole formed by splicing the magnet placing hole and the magnet placing area, one end of the magnet is abutted against the closed end of the magnet placing hole, the other end of the magnet is provided with a spherical raised head, the bottom of the spherical raised head is abutted against the step surface of the through hole and the internal thread connecting hole, and the top point of the spherical raised head protrudes out of the through hole.
2. The magnetic measuring head mounting structure applicable to the unit concentric measuring device according to claim 1, wherein the measuring head fixing portion is provided with an internal threaded connecting hole matched with the rear section external threaded connecting section;
the tail rod rear section is fixedly connected with an internal thread connecting hole arranged at a corresponding position on the measuring head fixing part through a rear section external thread connecting section arranged close to the end part, and meanwhile, the internal thread connecting hole is in threaded fit connection with the rear section external thread connecting section, and a magnet placing area communicated with the magnet placing hole exists.
3. The magnetic probe mounting structure for the concentric measuring device of the unit according to claim 2, wherein the closed end of the magnet installation hole abuts against the rear-section connecting internal threaded hole, and the open end of the magnet installation hole penetrates through the end face of the rear-section external threaded connecting section.
4. The magnetic measuring head mounting structure suitable for the concentric measuring device of the unit according to claim 3, wherein the magnet mounting hole is a stepped hole, and comprises two divided sections, namely a divided section a and a divided section b; the split section a is arranged close to the rear section connecting internal thread hole, the split section b penetrates through the rear section external thread connecting section, and the inner diameter of the split section a is larger than that of the split section b.
5. The magnetic probe mounting structure for the concentric measuring device of a unit according to claim 4, wherein the magnet is a neodymium iron boron magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022835881.2U CN214308592U (en) | 2020-11-30 | 2020-11-30 | Magnetic measuring head mounting structure suitable for concentric measuring device of unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022835881.2U CN214308592U (en) | 2020-11-30 | 2020-11-30 | Magnetic measuring head mounting structure suitable for concentric measuring device of unit |
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| Publication Number | Publication Date |
|---|---|
| CN214308592U true CN214308592U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022835881.2U Active CN214308592U (en) | 2020-11-30 | 2020-11-30 | Magnetic measuring head mounting structure suitable for concentric measuring device of unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214308592U (en) |
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2020
- 2020-11-30 CN CN202022835881.2U patent/CN214308592U/en active Active
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