CN111811376B - Impeller rotating gap detection device - Google Patents
Impeller rotating gap detection device Download PDFInfo
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- CN111811376B CN111811376B CN202010475672.3A CN202010475672A CN111811376B CN 111811376 B CN111811376 B CN 111811376B CN 202010475672 A CN202010475672 A CN 202010475672A CN 111811376 B CN111811376 B CN 111811376B
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- impeller
- screw rod
- assembly
- threaded sleeve
- hole
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
Abstract
The utility model provides an impeller turning gap detection device belongs to the water jet propulsion ware field. The impeller rotating clearance detection device comprises a screw rod assembly, an impeller connecting assembly, a supporting seat assembly and a loading assembly; the screw rod assembly comprises a screw rod; the impeller connecting assembly comprises a transition flange which is coaxially and fixedly connected to one end of the screw rod; the support seat assembly comprises a support seat plate, a detection window, a through hole and an annular seam allowance are arranged on the support seat plate, the screw rod is coaxially positioned in the through hole, and the detection window is positioned between the through hole and the annular seam allowance; the loading assembly comprises a threaded sleeve, and the threaded sleeve is sleeved on the screw rod. During detection, the threaded sleeve is rotated, the wheel hub of the impeller is pulled along the axial direction through the screw rod, and the clearance between the impeller and the impeller cover is measured through the detection window on the support seat plate by utilizing clearance measuring tools such as a feeler gauge. The assembly of the impeller and the impeller cover is guided, and the impeller can have enough clearance without scraping when in actual work.
Description
Technical Field
The disclosure relates to the field of water-jet propellers, in particular to an impeller rotating clearance detection device.
Background
Thrusters are an important component in the power system of a marine vessel. A propeller typically includes an impeller and an impeller housing in which the impeller is coaxially located, and by rotation of the impeller, a jet of water is formed in the impeller housing to power the vessel.
The impeller can receive great axial force (mainly the reaction force of water flow to the impeller) in the rotation process, and because the bearing installed on the impeller has axial play, the impeller can generate axial movement under the action of the axial force, so that the clearance between the impeller and the impeller cover is reduced.
The impeller can generate certain axial displacement under the action of axial force in the rotating process. Because the clearance between the impeller and the impeller cover is usually small, and the impeller cover is generally conical, the impeller generates axial displacement under the action of axial force, and the impeller cover are possibly contacted to generate scraping. In order to avoid the impeller from scraping against the impeller shroud during rotation, it is necessary to ensure that there is sufficient clearance between the impeller and the impeller shroud during rotation of the impeller.
Disclosure of Invention
The embodiment of the disclosure provides an impeller rotating gap detection device, which can accurately determine a gap between an impeller and an impeller cover. The technical scheme is as follows:
the embodiment of the disclosure provides an impeller rotating clearance detection device, which comprises a screw rod assembly, an impeller connecting assembly, a supporting seat assembly and a loading assembly;
the screw rod assembly comprises a screw rod;
the impeller connecting assembly comprises a transition flange, the transition flange is coaxially and fixedly connected to one end of the screw rod, and the transition flange is used for being coaxially connected with a hub of an impeller;
the supporting seat assembly comprises a supporting seat plate, a detection window, a through hole and an annular spigot used for connecting the small end of the impeller cover are arranged on the supporting seat plate, the screw rod is coaxially positioned in the through hole, the through hole is in clearance fit with the screw rod, the annular spigot is coaxial with the through hole, and the detection window is positioned between the through hole and the annular spigot;
the loading assembly comprises a threaded sleeve, the threaded sleeve is sleeved on the screw rod and is in threaded fit with the screw rod, and the supporting seat plate is located between the threaded sleeve and the transition flange.
Optionally, the outer wall of the screw rod comprises a thread area and a polished rod area along the axial direction of the screw rod, threads matched with the threads of the threaded sleeve are distributed in the thread area, the polished rod area is free of threads, and the polished rod area is in clearance fit with the through hole.
Optionally, the screw rod assembly further includes a positioning flange, the positioning flange is coaxially connected to the screw rod and the transition flange, and an outer diameter of the positioning flange is smaller than an outer diameter of the transition flange.
Optionally, one surface of the transition flange is provided with a coaxial hub positioning spigot, the other surface of the transition flange is provided with a coaxial cylindrical positioning boss, the positioning flange is provided with a coaxial positioning hole, and the cylindrical positioning boss is located in the positioning hole.
Optionally, the supporting seat assembly further comprises a thrust bearing, the thrust bearing is sleeved on the lead screw and in clearance fit with the lead screw, the thrust bearing is located on the supporting seat plate, the thrust bearing is located between the supporting seat plate and the threaded sleeve, and the inner diameter of the thrust bearing is smaller than the outer diameter of the threaded sleeve.
Optionally, the support seat plate is provided with a bearing installation groove coaxial with the through hole, and the thrust bearing is located in the bearing installation groove.
Optionally, the loading assembly further comprises a rotating handle connected to an outer wall of the threaded sleeve.
Optionally, the threaded sleeve includes a first pipe section and a second pipe section that are coaxially connected, the first pipe section is in threaded fit with the screw rod, the inner wall of the second pipe section is not threaded, the second pipe section is in clearance fit with the screw rod, and the second pipe section is located between the first pipe section and the support base assembly along the axial direction of the screw rod.
Optionally, the impeller running clearance detection device further includes a dial indicator, the dial indicator includes a gauge stand and a gauge head, the gauge stand of the dial indicator is located on the support base plate, and the gauge head is located on one side of the support base plate close to the impeller connection assembly.
Optionally, the supporting seat assembly further comprises a lifting lug, the lifting lug is located on the supporting seat plate, and the lifting lug and the threaded sleeve are located on the same side of the supporting seat plate.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
through setting up lead screw subassembly, impeller coupling assembling, supporting seat subassembly and loading subassembly, wherein the lead screw subassembly includes the lead screw, and impeller coupling assembling includes the flange, and flange connection is in the one end of lead screw, when detecting, and flange connection subassembly's flange can coaxial coupling to on the wheel hub of impeller. The supporting seat assembly comprises a supporting seat plate, a through hole and an annular spigot are formed in the supporting seat plate, the supporting seat plate can be connected to the small end of the impeller cover through the annular spigot, and the supporting seat plate can be sleeved on the screw rod through the through hole. The loading assembly comprises a threaded sleeve, the threaded sleeve is sleeved on the lead screw and is in threaded connection with the lead screw, one end of the threaded sleeve is abutted to the supporting seat plate during detection, the lead screw can move axially by rotating the threaded sleeve, the wheel hub of the impeller is pulled axially by the lead screw, and after the axial displacement of the impeller reaches the maximum, the gap between the impeller and the impeller cover can be measured by utilizing clearance measuring tools such as a feeler gauge and the like through a detection window on the supporting seat plate. The impeller rotating gap detection device enables the impeller to generate the same axial displacement as that in actual work under the condition that the impeller does not rotate, so that the gap between the impeller and the impeller cover can be conveniently and accurately determined, the assembly of the impeller and the impeller cover is facilitated to be guided, and the impeller can have enough gap without scraping in the actual work.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a partial structural schematic view of a propeller in the related art;
fig. 2 is a schematic view of an impeller rotation gap detection device provided in an embodiment of the present disclosure;
FIG. 3 is a schematic view of a lead screw assembly provided by embodiments of the present disclosure;
fig. 4 is a schematic view of an impeller connection assembly provided by an embodiment of the present disclosure;
FIG. 5 is a schematic illustration of a support base assembly provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a loading assembly provided by embodiments of the present disclosure;
FIG. 7 is a schematic structural diagram of a transition flange provided in an embodiment of the present disclosure;
fig. 8 is a schematic structural view of a supporting seat plate according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.
Fig. 1 is a partial structural schematic view of a propeller in the related art. As shown in fig. 1, the propeller includes an impeller 10 and an impeller cup 20. The impeller 10 comprises a hub 11 and blades 12 distributed over the hub 11. The impeller shroud 20 is generally conical in shape having a small end 20a and a large end 20b, the small end 20a of the impeller shroud 20 being the smaller diameter end and the large end 20b of the impeller shroud 20 being the larger diameter end.
When the propeller works, the impeller 10 rotates at a high speed, and water flows into the impeller casing 20 from the small end 20a of the impeller casing 20 and is ejected from the large end 20b of the impeller casing 20 under the action of the impeller 10. When the impeller 10 rotates, a force is applied to the water flow, and the impeller 10 is subjected to a reaction force applied thereto by the water flow, and the reaction force causes the impeller 10 to move toward the small end 20a of the impeller housing 20 along the axial direction thereof, so that the gap D between the blades 12 of the impeller 10 and the inner wall of the impeller housing 20 is reduced. If the assembly gap between the impeller shroud 20 and the impeller 10 does not meet the design requirements, the blades 12 of the impeller 10 may contact the inner wall of the impeller shroud 20 to cause scraping during the operation of the propeller.
Fig. 2 is a schematic view of an impeller rotation gap detection device provided in an embodiment of the present disclosure. As shown in fig. 2, the impeller rotation gap detecting apparatus includes a screw assembly 30, an impeller connecting assembly 40, a support seat assembly 50, and a loading assembly 60.
Fig. 3 is a schematic view of a lead screw assembly provided in an embodiment of the present disclosure. As shown in fig. 3, the lead screw assembly 30 includes a lead screw 31.
Fig. 4 is a schematic view of an impeller connection assembly provided by an embodiment of the present disclosure. As shown in fig. 4, the impeller attachment assembly 40 includes a transition flange 41. Referring to fig. 2, a transition flange 41 is coaxially and fixedly connected to one end of the screw rod 31, and the transition flange 41 is used for coaxially connecting the hub of the impeller.
Fig. 5 is a schematic view of a support seat assembly according to an embodiment of the disclosure. As shown in fig. 5, the supporting seat assembly 50 includes a supporting seat plate 51, and the supporting seat plate 51 has a detection window 51a, a through hole 51b and an annular spigot 51c for connecting the small end 20a of the impeller housing. Referring to fig. 2, the screw rod 31 is coaxially located in the through hole 51b, the through hole 51b is in clearance fit with the screw rod 31, the annular stop 51c is coaxial with the through hole 51b, and the detection window 51a is located between the through hole 51b and the annular stop 51 c.
Fig. 6 is a schematic diagram of a loading assembly according to an embodiment of the present disclosure. As shown in fig. 6, the loading assembly 60 includes a threaded sleeve 61. Referring to fig. 2, the threaded sleeve 61 is sleeved on the screw rod 31 and is in threaded fit with the screw rod 31, and the support seat plate 51 is located between the threaded sleeve 61 and the transition flange 41.
Through setting up lead screw subassembly, impeller coupling assembling, supporting seat subassembly and loading subassembly, wherein the lead screw subassembly includes the lead screw, and impeller coupling assembling includes the flange, and flange connection is in the one end of lead screw, when detecting, and flange connection subassembly's flange can coaxial coupling to on the wheel hub of impeller. The supporting seat assembly comprises a supporting seat plate, a through hole and an annular spigot are formed in the supporting seat plate, the supporting seat plate can be connected to the small end of the impeller cover through the annular spigot, and the supporting seat plate can be sleeved on the screw rod through the through hole. The loading assembly comprises a threaded sleeve, the threaded sleeve is sleeved on the lead screw and is in threaded connection with the lead screw, one end of the threaded sleeve is abutted to the support base plate during detection, the lead screw can move axially by rotating the threaded sleeve, the hub of the impeller is pulled along the axial direction by the lead screw, and after the axial displacement of the impeller reaches the maximum, the gap between the impeller and the impeller cover can be measured by utilizing clearance measuring tools such as a feeler gauge through a detection window on the support base plate. The impeller rotating gap detection device enables the impeller to generate the same axial displacement as that in actual work under the condition that the impeller does not rotate, so that the gap between the impeller and the impeller cover can be conveniently and accurately determined, the assembly of the impeller and the impeller cover is facilitated to be guided, and the impeller can have enough gap without scraping in the actual work.
As shown in fig. 3, the outer wall of the lead screw 31 may include a threaded section 31a and a polished section 31b in the axial direction of the lead screw 31. The threaded area 31a is distributed with threads matched with the threads of the threaded sleeve 61, the polish rod area 31b is not provided with threads, and the polish rod area 31b is in clearance fit with the through hole 51 b.
Since the screw rod 31 only needs to be screw-fitted with the screw sleeve 61 with a clearance fit with the support seat plate 51, by forming the threaded section 31a and the polished rod section 31b on the outer wall of the screw rod 31, the screw thread distributed by the threaded section 31a is fitted with the screw sleeve 61. The polished rod area 31b is unthreaded, and the polished rod area 31b of the screw rod 31 has a smooth surface, so that the screw rod 31 is favorably matched with the through hole 51b on the support seat plate 51, and the screw rod 31 can be centered.
The lead screw assembly 30 may further include a lead screw handle 32 attached to one end of the lead screw 31. The arrangement of the screw rod handle 32 can facilitate circumferential fixation of the screw rod 31 in the process of rotating the threaded sleeve 61.
Illustratively, the lead screw handle 32 may include an operation lever 321 vertically connected to one end of the lead screw 31. The screw 31 may have an insertion hole 31c, and the operating rod 321 may be inserted into the insertion hole 31 c.
The two ends of the operating rod 321 can be arc end surfaces, so that the operating rod 321 can be conveniently held, and the operating rod 321 is prevented from scratching workers.
As shown in fig. 3, the lead screw assembly 30 may further include a positioning flange 33. Referring to fig. 2, the positioning flange 33 coaxially connects the screw rod 31 and the transition flange 41, and the outer diameter of the positioning flange 33 is smaller than that of the transition flange 41.
By arranging the positioning flange 33 to connect the screw rod 31 and the transition flange 41, during testing, the transition flange 41 can be connected to the hub 11 of the impeller 10, and then the screw rod 31 and the transition flange 41 are connected through the positioning flange 33.
The positioning flange 33 may have a coaxial positioning hole 33a, the end of the screw 31 may have a coaxial positioning post 311, and the positioning post 311 may be coaxially located in the positioning hole 33 a. The matching of the positioning column 311 and the positioning hole 33a is beneficial to improving the coaxiality of the screw rod 31 and the positioning flange 33.
Alternatively, the screw 31 and the positioning flange 33 may be welded. For example, the screw rod 31 and the positioning flange 33 may be welded by fillet welding.
As shown in fig. 4, one face of the transition flange 41 may have a coaxial hub locating spigot 41a and the other face of the transition flange 41 may have a coaxial cylindrical locating boss 411. The cylindrical positioning boss 411 is located in the positioning hole 33 a.
The hub positioning spigot 41a on the transition flange 41 can be positioned with the hub 11 of the impeller 10 to improve the coaxiality of the transition flange 41 and the impeller 10. The cylindrical positioning boss 411 on the transition flange 41 is located in the positioning hole 33a on the positioning flange 33, and the coaxiality of the transition flange 41 and the positioning flange 33 can be improved by utilizing the matching of the cylindrical positioning boss 411 and the positioning hole 33a, so that the coaxiality of the screw rod 31 and the impeller 10 is improved, and the direction of the acting force of the screw rod 31 on the impeller 10 is along the axial direction of the impeller 10 in the detection process.
Fig. 7 is a schematic structural diagram of a transition flange provided in an embodiment of the present disclosure. As shown in fig. 7, the transition flange 41 may have a plurality of first connection holes 41b and a plurality of second connection holes 41c, the plurality of first connection holes 41b are used for connecting the transition flange 41 to the hub 11 of the impeller 10, and the plurality of second connection holes 41c are used for connecting the transition flange 41 to the positioning flange 33.
The plurality of first connection holes 41b may be arranged at equal angular intervals in the circumferential direction of the transition flange 41, and the plurality of second connection holes 41c may also be arranged at equal angular intervals in the circumferential direction of the transition flange 41.
Optionally, the transition flange 41 may further have a positioning pin hole 41d, and the positioning pin hole 41d may be positioned with the hub 11 of the impeller 10 by a positioning pin 42.
The transition flange 41 may have a plurality of positioning pin holes 41d thereon, and the plurality of positioning pin holes 41d may be arranged at equal angular intervals in the circumferential direction of the transition flange 41.
Optionally, the impeller rotation gap detection device may include a plurality of transition flanges 41 with different diameters, and the transition flanges 41 with different diameters may be selected to connect according to the propeller to be detected, so that the propellers with different specifications may be detected.
Referring to FIG. 5, the shoe assembly 50 may also include a thrust bearing 52. The thrust bearing 52 is sleeved on the screw rod 31 and is in clearance fit with the screw rod 31. The thrust bearing 52 is located on the support saddle 51, the thrust bearing 52 is located between the support saddle 51 and the threaded sleeve 61, and the inner diameter of the thrust bearing 52 is smaller than the outer diameter of the threaded sleeve 61.
The provision of the thrust bearing 52 facilitates the rotation of the threaded sleeve 61 and facilitates the reduction of friction generated between the support base plate 51 and the threaded sleeve 61.
When the screw sleeve 61 is rotated to cause the screw rod 31 to pull the impeller 10 in the axial direction, a large pressure is generated between the screw sleeve 61 and the support seat assembly 50, if the screw sleeve 61 directly contacts with the surface of the support seat plate 51, a large friction is generated between the screw sleeve 61 and the support seat plate 51 when the screw sleeve 61 is rotated, abrasion is generated on the support seat plate 51 and the screw sleeve 61, and as the screw sleeve 61 rotates, the pressure between the screw sleeve 61 and the support seat assembly 50 is larger, the frictional resistance between the screw sleeve 61 and the support seat plate 51 is also larger, the abrasion between the screw sleeve 61 and the support seat plate 51 is further increased, and the screw sleeve 61 is also more difficult to rotate, which may cause that the pulling force of the screw rod 31 to the impeller 10 is not large enough, and the gap between the impeller 10 and the impeller cover 20 is not reduced to the minimum gap that may be achieved in the actual working process, so that the detection result has a large deviation from the actual value.
Through setting up thrust bearing 52, threaded sleeve 61 directly supports on thrust bearing 52, can avoid supporting bedplate 51 and threaded sleeve 61 to receive wearing and tearing, and threaded sleeve 61 rotates also more easily, makes lead screw 31 can produce enough big pulling force to impeller 10, so that the clearance between impeller 10 and the impeller cover 20 can reduce to the propeller in-process of actually working, the minimum clearance that probably reaches between impeller 10 and the impeller cover 20, is favorable to improving the accuracy of testing result.
Fig. 8 is a schematic structural view of a supporting seat plate provided by the embodiment of the disclosure. As shown in fig. 8, the support seat plate 51 may have a bearing installation groove 51d coaxial with the through hole 51b, and the thrust bearing 52 is located in the bearing installation groove 51 d. By providing the bearing mounting groove 51d, the mounting of the thrust bearing 52 can be facilitated, and the thrust bearing 52 is prevented from being detached from the support base plate 51.
Optionally, the shoe assembly 50 may also include a bearing cap 53. The bearing cover 53 is annular, the bearing cover 53 can be coaxially connected to the support seat plate 51, and the thrust bearing 52 can be limited in the bearing installation groove 51d through the bearing cover 53, so that the thrust bearing 52 is prevented from loosening.
The inner diameter of the bearing cap 53 is larger than the outer diameter of the threaded sleeve 61 but smaller than the outer diameter of the thrust bearing 52, so that after the bearing cap 53 is mounted on the support base plate 51, a part of the side surface of the thrust bearing 52 can be exposed, and the end of the threaded sleeve 61 can be abutted against the thrust bearing 52.
As shown in fig. 8, the support seat plate 51 may be circular, and a plurality of bearing cover fixing holes 51e may be circumferentially spaced on the support seat plate 51 to fix the bearing cover 53.
The bearing cover 53 may be bolted to the support base plate 51 to facilitate the removal and installation of the bearing cover 53.
Optionally, the support pedestal assembly 50 may also include a lifting lug 54. The lifting lug 54 is positioned on the support saddle 51, and the lifting lug 54 and the threaded sleeve 61 are positioned on the same side of the support saddle 51.
Through setting up lug 54, can make things convenient for handling impeller turning gap detection device, further facilitate the use. The support base assembly 50 may include a plurality of lifting lugs 54, and the plurality of lifting lugs 54 may be arranged at equal angular intervals along the circumferential direction of the support base plate 51, so that it is possible to more smoothly lift the impeller rotation gap detecting device.
In addition, the end of the screw rod 31 can also be provided with a lifting lug 54, so that a stress point can be added when the impeller rotation gap detection device is lifted, and the screw rod assembly 30 can be prevented from loosening.
As shown in fig. 8, the support seat plate 51 may include an outer ring 511 and a circular inner plate 512 having a circular shape, and a connecting arm 513 connecting the outer ring 511 and the inner plate 512, the inner plate 512 and the outer ring 511 being coaxially arranged. The thrust bearing 52 and the bearing cap 53 are both located on the inner plate 512, and the annular spigot 51c for connecting the small end 20a of the impeller cup is located on the outer ring 511.
Illustratively, the support base 51 includes two connecting arms 513, and the two connecting arms 513 may be arranged symmetrically about the center of the inner plate 512. This makes the mass distribution of the entire support base plate 51 more uniform.
In other possible implementations, the support seat plate 51 may also include other numbers of connecting arms 513, for example, three, four, etc., and the plurality of connecting arms 513 may be arranged at equal angular intervals along the circumference of the inner plate 512.
The connecting arm 513 divides an annular space between the outer ring 511 and the inner plate 512 into a plurality of inspection windows 51a, and a measuring tool such as a feeler can be inserted into the impeller cup 20 through the inspection windows 51a to measure a gap between the blades 12 of the impeller 10 and the inner wall of the impeller cup 20 at the time of inspection. Since the connecting arms 513 are arranged at equal angular intervals in the circumferential direction of the inner plate 512, the detecting windows 51a are also arranged at equal angular intervals in the circumferential direction of the inner plate 512, so that a plurality of positions can be conveniently selected in the circumferential direction of the impeller 10 for measurement, and the detecting accuracy is improved.
Referring to fig. 2, the impeller rotation gap detecting means may further include a dial gauge 60. The dial indicator 60 comprises an indicator seat 61 and an indicator head 62, wherein the indicator seat 61 of the dial indicator 60 is positioned on the support seat plate 51, and the indicator head 62 is positioned on one side of the support seat plate 51 close to the impeller connecting assembly 40.
The dial indicator 60 is generally provided with a measuring head 621, and by arranging the dial indicator 60, during detection, the indicator head 62 of the dial indicator 60 can be adjusted to enable the measuring head 621 of the dial indicator 60 to be in contact with the transition flange 41, and then the threaded sleeve 61 is rotated to enable the screw rod 31 to pull the impeller 10, so that in the process that the impeller 10 moves axially, the distance between the impeller 10 and the support seat plate 51 is gradually reduced, and the indication number of the dial indicator 60 is correspondingly changed. If the indication of the dial indicator 60 is not changed, it indicates that the axial displacement of the impeller 10 is equivalent to the axial displacement generated in actual operation, and at this time, the threaded sleeve 61 may not be rotated any more, and the measurement of the clearance between the blades 12 of the impeller 10 and the impeller shroud 20 by a clearance measuring tool such as a feeler gauge is started. Therefore, the dial indicator 60 is arranged, so that the measurement can be further facilitated, and the detection accuracy is improved.
As shown in fig. 6, the threaded bushing 61 may include a first tube segment 611 and a second tube segment 612 that are coaxially connected. The first pipe section 611 is in threaded fit with the screw rod 31, the inner wall of the second pipe section 612 is free of threads, the second pipe section 612 is in clearance fit with the screw rod 31, and the second pipe section 612 is located between the first pipe section 611 and the support seat assembly 50 along the axial direction of the screw rod 31.
During detection, the threaded area 31a of the screw rod 31 is in threaded fit with the first pipe section 611, the polish rod area 31b of the screw rod 31 and the second pipe section 612 are both unthreaded and are in clearance fit, the second pipe section 612 is equivalent to a buffer area, and because the second pipe section 612 is unthreaded, a part of threads on the screw rod 31 can be correspondingly reduced, and in the process of rotating the threaded sleeve 61, even if the threaded area 31a extends out from one end of the threaded sleeve 61 close to the support seat plate 51, the threaded area only reaches the second pipe section 612 and does not extend into the through hole 51b of the support seat plate 51.
Alternatively, first tube segment 611 and second tube segment 612 may be welded. Illustratively, the first tube segment 611 and the second tube segment 612 may be welded by fillet welds.
As shown in fig. 6, the charging assembly 60 may also include a rotating handle 62. A rotating handle 62 is attached to the outer wall of the threaded sleeve 61. The threaded sleeve 61 can be conveniently rotated at the time of testing by providing a rotating handle 62.
Alternatively, the rotatable handle 62 may include a plurality of rotatable rods 621 mounted on the outer wall of the threaded sleeve 61. The plurality of rotating bars 621 may be arranged at equal angular intervals along the circumferential direction of the threaded sleeve 61.
Illustratively, the rotating rod 621 and the threaded sleeve 61 may be threadedly coupled. Therefore, when the impeller rotating clearance detection device is not used, the rotating rod 621 can be detached, the space occupied by the impeller rotating clearance detection device is reduced, and the impeller rotating clearance detection device is convenient to store.
As shown in fig. 6, one end of the rotating rod 621 far away from the threaded sleeve 61 may be an arc end surface, which is convenient for operation and avoids scratching a worker.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. The impeller rotating clearance detection device is characterized by comprising a screw rod assembly (30), an impeller connecting assembly (40), a supporting seat assembly (50) and a loading assembly (60);
the screw assembly (30) comprises a screw (31);
the impeller connecting assembly (40) comprises a transition flange (41), the transition flange (41) is coaxially and fixedly connected to one end of the screw rod (31), and the transition flange (41) is used for being coaxially connected with a hub of an impeller;
the support seat assembly (50) comprises a support seat plate (51), the support seat plate (51) is provided with a detection window (51a), a through hole (51b) and an annular spigot (51c) for connecting a small end (20a) of the impeller cover, the support seat plate (51) comprises an annular outer ring (511), a circular inner plate (512) and a connecting arm (513) for connecting the outer ring (511) and the inner plate (512), the inner plate (512) and the outer ring (511) are coaxially arranged, the connecting arm (513) divides an annular interval between the outer ring (511) and the inner plate (512) into a plurality of detection windows (51a), the annular spigot (51c) is positioned on the outer ring (511), the through hole (51b) is positioned on the inner plate (512), the screw rod (31) is coaxially positioned in the through hole (51b), and the through hole (51b) is in clearance fit with the screw rod (31), the annular seam allowance (51c) is coaxial with the through hole (51b), and the detection window (51a) is positioned between the through hole (51b) and the annular seam allowance (51 c);
the loading assembly (60) comprises a threaded sleeve (61), the threaded sleeve (61) is sleeved on the screw rod (31) and is in threaded fit with the screw rod (31), and the support seat plate (51) is located between the threaded sleeve (61) and the transition flange (41).
2. The impeller running clearance detecting apparatus according to claim 1, wherein an outer wall of the screw rod (31) includes a threaded section (31a) and a polished rod section (31b) along an axial direction of the screw rod (31), the threaded section (31a) is distributed with threads to be screw-fitted to the threaded sleeve (61), the polished rod section (31b) is unthreaded, and the polished rod section (31b) is clearance-fitted to the through hole (51 b).
3. The impeller running clearance detecting apparatus according to claim 1, wherein the screw assembly (30) further includes a positioning flange (33), the positioning flange (33) coaxially connects the screw (31) and the transition flange (41), and an outer diameter of the positioning flange (33) is smaller than an outer diameter of the transition flange (41).
4. The impeller rotation gap detection device according to claim 3, wherein one surface of the transition flange (41) is provided with a coaxial hub positioning spigot (41a), the other surface of the transition flange (41) is provided with a coaxial cylindrical positioning boss (411), the positioning flange (33) is provided with a coaxial positioning hole (33a), and the cylindrical positioning boss (411) is positioned in the positioning hole (33 a).
5. The impeller running clearance detecting device according to any one of claims 1 to 4, wherein the support base assembly (50) further comprises a thrust bearing (52), the thrust bearing (52) is sleeved on the screw rod (31) and is in clearance fit with the screw rod (31), the thrust bearing (52) is located on the support base plate (51), the thrust bearing (52) is located between the support base plate (51) and the threaded sleeve (61), and the inner diameter of the thrust bearing (52) is smaller than the outer diameter of the threaded sleeve (61).
6. The impeller running gap detecting device according to claim 5, wherein the support base plate (51) has a bearing installation groove (51d) coaxial with the through hole (51b), and the thrust bearing (52) is located in the bearing installation groove (51 d).
7. The impeller running clearance detecting device according to any one of claims 1 to 4, wherein the loading assembly (60) further comprises a rotating handle (62), and the rotating handle (62) is connected to an outer wall of the threaded sleeve (61).
8. The impeller running clearance detecting device according to any one of claims 1 to 4, wherein the threaded sleeve (61) comprises a first pipe section (611) and a second pipe section (612) which are coaxially connected, the first pipe section (611) is in threaded fit with the screw rod (31), the inner wall of the second pipe section (612) is not threaded, the second pipe section (612) is in clearance fit with the screw rod (31), and the second pipe section (612) is located between the first pipe section (611) and the support seat assembly (50) along the axial direction of the screw rod (31).
9. The impeller rotation gap detection device according to claim 8, further comprising a dial indicator (60), wherein the dial indicator (60) comprises an indicator seat (61) and an indicator head (62), the indicator seat (61) of the dial indicator (60) is located on the support seat plate (51), and the indicator head (62) is located on one side of the support seat plate (51) close to the impeller connection assembly (40).
10. The impeller running clearance detecting device according to any one of claims 1 to 4, wherein the support base assembly (50) further comprises a lifting lug (54), the lifting lug (54) is located on the support base plate (51), and the lifting lug (54) and the threaded sleeve (61) are located on the same side of the support base plate (51).
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