CN109188010B - Testing machine - Google Patents

Abstract

The invention provides a testing machine, which is used for overspeed testing of impellers, and comprises: the speed regulating device comprises a core bar, and the core bar is connected with the impeller to drive the impeller to move; the damper is connected with the core rod to reduce the vibration of the core rod; the impeller is located in the test cavity, and the test cavity is used for providing a vacuum environment for the impeller so that the impeller rotates in the vacuum environment of the test cavity to reduce resistance. The testing machine solves the problem that the ultra-high-speed rotating impeller is inconvenient to test in the prior art.

Description

Testing machine

Technical Field

The invention relates to the field of speed testing, in particular to a testing machine.

Background

At present, most of the traditional impeller overspeed testing machines are directly driven by a motor or driven by a belt, the rotating speed can only be generally 10000r/min-25000r/min, but the working rotating speed of most of rotors in the existing rotating machines such as a gas compressing wheel, an expanding wheel, a turbine, a wheel disc, a blade disc and a centrifugal rotor exceeds 40000r/min.

Disclosure of Invention

The invention mainly aims to provide a testing machine for solving the problem that the ultra-high-speed rotating impeller is inconvenient to test in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a testing machine for performing an overspeed test on an impeller, the testing machine comprising: the speed regulating device comprises a core bar, and the core bar is connected with the impeller to drive the impeller to move; the damper is connected with the core rod to reduce the vibration of the core rod; the impeller is located in the test cavity, and the test cavity is used for providing a vacuum environment for the impeller so that the impeller rotates in the vacuum environment of the test cavity to reduce resistance.

Further, the testing machine further comprises a lifting mechanism, and the lifting mechanism is connected with the cover plate on the testing cavity so as to drive the cover plate to be connected with or separated from the cavity of the testing cavity.

Further, the lifting mechanism includes: a guide rail assembly; the lifting arm is arranged on the guide rail assembly in a lifting manner; the driving device is connected with the lifting arm to drive the lifting arm to ascend or descend; the lifting arm is connected with the cover plate, and the driving device drives the lifting arm to ascend or descend along the guide rail assembly so as to drive the cover plate to move.

Further, the testing machine further includes: the guide rail component is arranged on the supporting seat; and the oil tank is arranged on one side of the lifting arm away from the test cavity so as to supply oil to the damper.

Further, the speed regulating device comprises a mounting housing and a transmission mechanism, the mounting housing is provided with a mounting cavity for mounting the transmission mechanism, the transmission mechanism comprises a gear assembly, and the mounting cavity comprises: a first oil chamber; the gear assembly is arranged in the second oil cavity; the first oil cavity is communicated with the second oil cavity, a second oil inlet is formed in the side wall of the second oil cavity, so that oil enters the second oil cavity through the second oil inlet to be sprayed into the gear assembly for lubrication, an oil outlet is further formed in the mounting cavity, and after the oil in the mounting cavity reaches a preset position, the oil outlet discharges the oil so that the oil in the second oil cavity cannot completely submerge the gear assembly, and the resistance of the gear assembly during rotation is reduced.

Further, the gear assembly includes: the driving gear is used for being connected with an output shaft of the motor so that the motor drives the driving gear to rotate; the driving gear is meshed with the driven gear to drive the driven gear to rotate; the driving gear and the driven gear are both positioned in the second oil cavity, the driven gear is in driving connection with the impeller, the reference diameter of the driving gear is larger than that of the driven gear, and the motor is in driving connection with the impeller through the gear assembly so as to realize speed-increasing driving of the impeller.

Further, the transmission mechanism further includes: the motor is connected with the power input wheel so as to drive the power input wheel to rotate; the power input shaft comprises a first connecting part and a second connecting part, the power input wheel is connected with the first connecting part, the driving gear is connected with the second connecting part, and the motor drives the power input shaft to rotate through the power input wheel so as to drive the power input shaft to drive the driving gear to rotate.

Further, the first connecting portion is a conical shaft, the power input wheel is provided with a conical hole matched with the conical shaft, the conical shaft is inserted into the conical hole of the power input wheel, and the diameter of one end, close to the second connecting portion, of the conical shaft is larger than that of one end, far away from the second connecting portion, of the conical shaft.

Further, one end of the first connecting portion, which is far away from the second connecting portion, is provided with a positioning piece, and the positioning piece is connected with the power input shaft so as to position the power input wheel on the power input shaft.

Further, the damper includes: the shell, the core bar wears to set up in the shell; the damping spacer bush is arranged in the shell so as to reduce the vibration of the core rod; the damping seat is arranged in the shell and is connected with the damping spacer bush; and the detection device is arranged on the shell and is used for detecting the vibration of the core rod by detecting the vibration of the damping seat.

Further, an oil inlet port and an oil outlet port are arranged on the shell, and a first oil way is arranged on the damping spacer sleeve so that oil flows into the shell from the oil inlet port and flows through the first oil way to be discharged from the oil outlet port.

Further, the damping spacer includes: the core rod hole is used for penetrating the core rod; the first through holes are arranged around the core rod hole, so that oil flows from one end of the first through holes to the other end of the first through holes.

Further, the damper further includes: the first vibrator is arranged in the shell and is used for being sleeved outside the core rod.

Further, a second oil way is arranged on the first vibrator, so that oil flows into the shell from the oil inlet interface and flows into the first oil way after passing through the second oil way.

Further, the damper further includes: the second vibrator is sleeved on the outer side of the first vibrator so as to damp the core rod.

Further, a third oil way is arranged on the second vibrator, so that oil enters the shell from the oil inlet port and flows into the second oil way through the third oil way.

Further, a fourth oil way communicated with the second oil way and the third oil way is arranged on the damping seat so as to guide oil liquid into the second oil way from the third oil way.

Further, the damper further includes: and the first vibration reduction part is arranged between the first vibrator and the second vibrator so as to reduce vibration caused by the core rod.

Further, an oil inlet port is arranged on the shell, and the first damping part is a damping oil film, so that oil enters the shell from the oil inlet port to supply oil to the first damping part.

Further, the damper further includes: and the second vibration reduction part is arranged between the second vibrator and the shell so as to reduce vibration caused by the core rod.

Further, the second vibration reduction portion is a rubber member.

Further, the detection device comprises a vibration sensor, and the vibration sensor is connected with the damping seat to detect vibration of the damping seat.

Further, the housing includes a chassis, and the damper further includes: and the fixing component is arranged on the chassis to fix the vibration sensor.

Further, the damper further includes: the bearing assembly is sleeved on the core rod, and the fixing assembly is connected with the core rod through the bearing assembly.

Further, the test chamber comprises a locking mechanism, and the locking mechanism is used for locking the cover plate of the test chamber on the cavity body of the test chamber.

Further, the locking mechanism includes: the locking pieces are arranged on the cavity of the test cavity at intervals and are provided with an avoidance position and a locking position, and the locking pieces are movably arranged between the avoidance position and the locking position; the driving device is arranged on the cavity to drive the plurality of locking pieces to move simultaneously; wherein, a plurality of retaining members encircle the apron setting, and when the retaining member moved to the locking position, the retaining member was with the apron locking on the cavity to form sealed space between messenger's apron and the cavity, when the retaining member moved to dodge the position, the apron can remove relative cavity.

Further, the driving device includes: a driving cylinder; the driving cylinder is connected with the rotating assembly, and the rotating assembly is connected with each locking piece; the driving cylinder drives the rotating assembly to rotate so as to drive each locking piece to rotate.

Further, the rotating assembly includes: the driving plate is connected with the driving cylinder; the plurality of pull rods are arranged in one-to-one correspondence with the plurality of locking pieces and are respectively connected with the driving plate so as to drive the corresponding locking pieces to rotate under the driving of the driving plate.

The testing machine adopting the technical scheme of the invention is mainly used for carrying out overspeed test on the impeller so as to detect the rotating speed of the impeller, and mainly comprises a speed regulating device, a damper and a test cavity, wherein the speed regulating device is used for providing rotating power for the impeller and regulating the rotating speed of the impeller, the damper is wrapped on one side of a core rod so as to reduce the vibration of the core rod when the core rod rotates.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows an overall schematic of an embodiment of a testing machine according to the present invention;

FIG. 2 shows a schematic diagram of an embodiment of the governor device of the present invention;

FIG. 3 shows a cross-sectional view of the embodiment of the governor device of FIG. 2 of the present invention;

FIG. 4 shows a schematic overall construction of an embodiment of a damping mount according to the present invention;

FIG. 5 shows a top view of an embodiment of the damping mount of the present invention;

FIG. 6 shows a cross-sectional view of the damping mount embodiment A-A of FIG. 5;

FIG. 7 illustrates a schematic view of a perspective view of an embodiment of a damping spacer according to the present invention;

FIG. 8 illustrates a cross-sectional view at B-B of the damping cup embodiment of FIG. 7 of the present invention;

fig. 9 shows a schematic diagram of a first vibrator embodiment according to the present invention;

fig. 10 shows a cross-sectional view of a first vibrator embodiment of the present invention;

fig. 11 shows a schematic diagram of a second vibrator embodiment according to the present invention;

fig. 12 shows a cross-sectional view of a second vibrator embodiment of the present invention;

FIG. 13 shows a schematic view of an embodiment of a damping mount according to the present invention;

FIG. 14 shows a cross-sectional view of an embodiment of the damping mount of the present invention;

FIG. 15 shows an overall schematic of an embodiment of a damper with detection means of the present invention;

FIG. 16 shows a schematic view of an embodiment of a securing assembly of the present invention;

FIG. 17 shows a schematic view of a first detent embodiment of the present invention;

FIG. 18 shows a schematic view of an embodiment of the lifting mechanism of the present invention;

FIG. 19 is a schematic view showing the structure of the lock member in the retracted position in the vacuum apparatus according to the embodiment of the present invention;

FIG. 20 shows a partial enlarged view of the vacuum apparatus embodiment of FIG. 19;

FIG. 21 shows a schematic view from a perspective of an embodiment of the locking mechanism of the present invention;

FIG. 22 shows another schematic view of a locking mechanism embodiment of the present invention;

FIG. 23 shows a schematic view of an embodiment of a bearing assembly of the present invention;

fig. 24 is a schematic view showing a structure in which a locking member is located at a locking position in an embodiment of a vacuum apparatus according to the present invention.

Wherein the above figures include the following reference numerals:

1. a speed regulating device; 10. a mounting shell; 11. a first oil chamber; 12. a second oil chamber; 13. a second oil inlet; 14. an oil outlet; 15. a damper chassis; 16. a cover plate; 17. a first oil inlet; 20. a damper; 30. a drive gear; 40. a driven gear; 150. a power input wheel; 160. a power input shaft; 161. a first connection portion; 162. a second connecting portion; 70. a positioning piece; 80. a core bar; 90. a vibration sensor; 110. a sensor holder;

2. A test chamber; 21. damping spacer bush; 211. a first oil passage; 212. a core rod hole; 213. a first through hole; 22. a first vibrator; 221. a second oil path; 222. a first seal ring; 223. a second seal ring; 224. a first mounting groove; 225. a second mounting groove; 226. a second through hole; 23. a second vibrator; 231. a third oil passage; 232. a third through hole; 233. an oil port; 234. a first mounting step; 235. a second mounting step; 24. a housing; 241. an oil inlet port; 243. a chassis; 25. a damping seat; 251. a fourth oil passage; 26. a first vibration damping portion; 27. a second vibration damping portion; 272. a first rubber ring assembly; 273. a second rubber ring assembly; 41. a vibration sensor; 42. a first positioning member; 421. positioning holes; 43. a locking member; 431. a first locking plate; 432. a second locking plate; 433. a locking screw; 44. a second positioning member; 45. a bearing assembly; 100. a core bar;

50. a cover plate; 51. a locking member; 52. a mounting plate; 53. a limit component; 54. positioning a shaft; 55. a driving cylinder; 56. a rotating assembly; 561. a driving plate; 562. a pull rod; 57. a bearing assembly; 571. a bearing support; 572. a bearing; 58. a cavity; 60. an oil tank; 61. a lifting arm; 62. a driving motor; 63. driving a screw rod; 64. a guide wheel assembly; 65. a support base; 66. a rotating bearing; 67. a connecting plate; 68. and a guide rail assembly.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

The invention provides a testing machine for overspeed testing of impellers, please refer to fig. 1, the testing machine comprises: the speed regulating device 1 comprises a core bar 100, wherein the core bar 100 is connected with the impeller to drive the impeller to move; a damper 20, the damper 20 being connected to the core bar 100 to reduce vibration of the core bar 100; the impeller is positioned in the test cavity 2, and the test cavity 2 is used for providing a vacuum environment for the impeller so as to enable the impeller to rotate in the vacuum environment of the test cavity 2 to reduce resistance.

The testing machine is mainly used for performing an overspeed test on an impeller to detect the rotating speed of the impeller, and mainly comprises a speed regulating device 1, a damper 20 and a testing cavity 2, wherein the speed regulating device 1 is used for providing rotating power for the impeller and regulating the rotating speed of the impeller, the damper 20 is wrapped on one side of a core rod 100 so as to reduce the vibration of the core rod 100 when the core rod 100 rotates, the impeller is placed in the testing cavity 2 when the overspeed testing machine is used for testing, the testing cavity is in a vacuum environment, the impeller is arranged in the testing cavity and rotates so as to avoid resistance caused by air, the impeller can rotate at an ultra-high speed, and the problem that the ultra-high speed impeller in the prior art cannot be tested when rotating is solved.

The testing machine further comprises a lifting mechanism, wherein the lifting mechanism is connected with the cover plate 50 on the testing cavity 2 so as to drive the cover plate 50 to be connected with or separated from the cavity 58 of the testing cavity 2.

As shown in fig. 1, the testing machine in this embodiment is further provided with a lifting mechanism, and the lifting mechanism is used for lifting the cover plate 50 on the testing chamber 2 when the impeller is replaced, so that the impeller is replaced more conveniently and rapidly.

The lifting mechanism comprises: a rail assembly 68; a lift arm 61, the lift arm 61 being liftably provided on the rail assembly 68; a driving device connected to the lift arm 61 to drive the lift arm 61 to rise or fall; the lifting arm 61 is connected to the cover plate 50, and the driving device drives the lifting arm 61 to rise or fall along the guide rail assembly 68 to drive the cover plate 50 to move.

As shown in fig. 1 and 18, the lifting mechanism in this embodiment includes a rail assembly 68, a lifting arm 61, and a driving device, where the driving device is used to drive the lifting arm 61 to move up and down along the rail assembly 68, so as to drive the cover plate 50 to move up and down.

The testing machine further comprises: the support base 65, the guide rail assembly 68 is set up on support base 65; an oil tank 60, the oil tank 60 being provided on a side of the lift arm 61 remote from the test chamber to supply oil into the damper 20.

As shown in fig. 1, the testing machine in this embodiment is further provided with a supporting seat 65 and an oil tank 60, the oil tank 60 is disposed at one end of the lifting arm 61 away from the cover plate 50, the supporting seat 65 is disposed at a middle position below the lifting arm near the lifting arm 61, the oil tank 60, the supporting seat 65 and the cover plate 50 form a teeterboard structure to prevent the lifting arm 61 from deflecting, and the oil tank 60 is used for supplying lubricating oil or damping oil and the like into the damper 20.

As shown in fig. 2 and 3, the speed regulating device in this embodiment includes a mounting housing 10 and a transmission mechanism, the gear assembly of the transmission mechanism is disposed in the mounting cavity, the mounting cavity is divided into two cavities, a first oil cavity 11 and a second oil cavity 12, the second oil cavity 12 is located higher than the first oil cavity 11, the gear assembly is disposed in the second oil cavity 12, lubricating oil is sprayed from a second oil inlet 13 on a side wall of the second oil cavity 12 and is sprayed to a place where gears are meshed for lubrication, the first oil cavity 11 is communicated with the second oil cavity 12, the oil flows into the first oil cavity 11 after passing through the gear assembly to supply oil to devices in the first oil cavity 11, one or more second oil inlets 13 are disposed on a side wall of the second oil cavity 12, an oil outlet 14 is further disposed on the mounting housing 10 of the invention, the oil outlet 14 is matched with the second oil inlet 13 to keep the first oil cavity 11 full of the oil, and the oil in the second oil cavity 12 is not submerged in the gear assembly, so that stirring oil of the gear assembly cannot occur in the rotation process, and simultaneously, the gear assembly can be prevented from generating large resistance in the rotation process, and simultaneously, the gear assembly can be effectively stirred to be immersed in the gear assembly in the prior art to solve the problem of overspeed test.

In an alternative first embodiment of the invention, the oil in the installation cavity is controlled by setting the pipe diameters of the second oil inlet 13 and the oil outlet 14.

In an alternative second embodiment of the invention, a liquid level sensor is arranged in the installation cavity, the liquid level sensor is installed according to the required height of the oil, and after the oil exceeds a preset position, the oil outlet is opened to discharge oil so as to maintain the liquid level of the oil in the installation cavity.

In an alternative third embodiment of the present invention, the oil outlet 14 is installed at a preset position, and after the oil in the installation cavity exceeds the position of the oil outlet 14, the oil is discharged from the oil outlet 14.

The second oil inlets 13 are multiple, and the multiple second oil inlets 13 are arranged on the side wall of the second oil cavity 12 at intervals so as to spray oil into the second oil cavity 12; wherein, the oil outlet 14 is arranged on the side wall of the first oil cavity 11 for discharging the oil in the installation cavity; the second oil chamber 12 is disposed above the first oil chamber 11 such that oil enters the second oil chamber 12 from the second oil inlet 13 and flows through the second oil chamber 12 to the first oil chamber 11, and exits the installation chamber from the oil outlet 14.

As shown in fig. 3, in this embodiment, a plurality of second oil inlets 13 are disposed on the outer wall of the second oil chamber 12, and the plurality of second oil inlets 13 can spray oil onto the gear assembly at the same time to ensure lubrication and heat dissipation effects, the oil outlet 14 in this embodiment is disposed on the first oil chamber 11, the second oil chamber 12 is disposed directly above the first oil chamber 11, oil enters the mounting chamber through the second oil inlets 13 on the second oil chamber 12, and is discharged through the oil outlet 14 on the first oil chamber 11.

The gear assembly includes: the driving gear 30, the driving gear 30 is used for being connected with the output shaft of the motor, so that the motor drives the driving gear 30 to rotate; the driven gear 40, the driving gear 30 is meshed with the driven gear 40 to drive the driven gear 40 to rotate; the driving gear 30 and the driven gear 40 are both located in the second oil cavity 12, the driven gear 40 is used for being connected with the impeller, and the reference diameter of the driving gear 30 is larger than the reference diameter of the driven gear 40, so that the motor is in driving connection with the impeller through the gear assembly, and speed-up driving of the impeller is achieved.

The transmission mechanism further includes: the power input wheel 150, the motor is connected with the power input wheel 150 to drive the power input wheel 150 to rotate; the power input shaft 160, the power input shaft 160 includes a first connecting portion 161 and a second connecting portion 162, the power input wheel 150 is connected with the first connecting portion 161, the driving gear 30 is connected with the second connecting portion 162, and the motor drives the power input shaft 160 to rotate through the power input wheel 150 so as to drive the power input shaft 160 to drive the driving gear 30 to rotate.

As shown in fig. 2 and 3, the transmission mechanism in this embodiment includes a gear assembly and a pulley assembly, the pulley assembly is in driving connection with the gear assembly, the motor drives the gear assembly to rotate through driving the pulley assembly, the gear assembly includes a driving gear 30 and a driven gear 40, the pulley assembly includes a power input wheel 150, the power input wheel 150 is connected with the gear assembly through a power input shaft 160, the pulley assembly drives the power input shaft 160 to rotate, the power input shaft 160 drives the driving gear 30 to rotate, the reference diameter of the driving gear 30 is larger than the reference diameter of the driven gear 40, so that the purpose of improving the rotation speed is achieved, and the specific reference diameter size ratio is set according to the requirement of the rotation speed ratio.

The first connecting portion 161 is a tapered shaft, the power input wheel 150 is provided with a tapered hole matched with the tapered shaft, the tapered shaft is inserted into the tapered hole of the power input wheel 150, and the diameter of one end of the tapered shaft, which is close to the second connecting portion 162, is larger than the diameter of one end of the tapered shaft, which is far away from the second connecting portion 162.

The end of the first connecting portion 161 away from the second connecting portion 162 is provided with a positioning member 70, and the positioning member 70 is connected with the power input shaft 160 to position the power input wheel 150 on the power input shaft 160.

As shown in fig. 3, the power input shaft 160 in this embodiment is a tapered shaft, and the tapered shaft has a smaller diameter at the end of the tapered shaft away from the tapered shaft, so that the power input wheel 150 has a tapered hole matching with the tapered shaft, so that the power input wheel 150 is sleeved outside the power input shaft 160, the embodiment further includes a positioning member 70, the positioning member 70 is disposed at the end of the tapered shaft with a smaller section, the positioning member 70 is a cover plate with a hole in the middle, in addition, a threaded hole is disposed at the end of the tapered shaft with a smaller section, a screw is inserted into the threaded holes of the positioning member 70 and the tapered shaft so as to connect the positioning member 70 with the power input shaft 160, and the positioning member 70, the tapered hole and the tapered shaft combine to connect the power input wheel 150 with the power input shaft 160, thereby avoiding the problem of easy shaking of previous key connection.

The speed regulating device further comprises: the core bar 100 and the gear component are connected with the impeller through the core bar 100 to drive the impeller to rotate.

As shown in fig. 3, the speed regulating device in this embodiment is further provided with a core bar 100, one end of the core bar 100 is inserted in the center of the driven gear 40 and rotates with the driven gear 40, and the other end of the core bar 100 is connected with the impeller, so that an overspeed experiment is performed.

The speed regulating device further comprises: the damper 20, the damper 20 is disposed in the first oil chamber 11, the damper 20 is connected with the stem 100, and in particular, the damper 20 is disposed around the stem 100 to reduce vibration of the stem 100.

In this embodiment, the device in the first oil cavity is a damper 20, and the damper 20 is disposed around the outer wall of the core rod 100 to reduce the shake of the core rod 100 during the rotation process.

Preferably, the damper 20 in the present invention is a rubber damper.

The mounting housing 10 includes a damper chassis 15, the damper 20 is provided on the damper chassis 15, and the speed regulating device further includes a vibration sensor 90 provided on the damper chassis 15 to detect the magnitude of the vibration amplitude of the damper chassis 15.

The installation housing 10 includes a cover plate 16, the power input wheel 150 is disposed at the outer side of the cover plate 16, the speed regulating device further includes a speed sensor, a sensor bracket 110 is provided on the installation housing 10, and the speed sensor is installed on the sensor bracket 110 to measure the rotation speed of the power input wheel 150 by detecting the rotation number of the power input wheel 150.

As shown in fig. 2 and 3, in order to ensure the safe use of the speed regulating device in this embodiment, a vibration sensor 90 is disposed on the damper chassis 15 to monitor the abnormality of the transmission assembly by detecting the vibration of the damper chassis 15, and if the vibration is too large, the vibration sensor will give an alarm to control the motor to be turned off and stop the experiment. In addition, the speed regulating device in this embodiment is further provided with a speed sensor, the speed sensor is disposed on the sensor bracket 110, a detected member for detecting the speed sensor is disposed on the power input wheel 150, the power input wheel 150 rotates, the detected member rotates along with the rotation, and the speed sensor determines the rotation speed of the power input wheel 150 by detecting the detected member, so as to measure the input speed or calculate the output speed of the speed regulating device.

The side wall of the first oil cavity 11 is provided with one or more first oil inlets 17, and the first oil inlets 17 are used for supplying oil into the first oil cavity 11.

As shown in fig. 3, a first oil inlet 17 is also provided on the side wall of the first oil chamber 11 in this embodiment to directly supply oil into the first oil chamber 11.

As shown in fig. 4 to 18, the damper in the present embodiment includes: the shell 24, the core bar 100 wears to locate in shell 24; damping spacer 21, damping spacer 21 is set up in shell 24, in order to reduce the vibration of the core bar 100; the damping seat 25 is arranged in the shell 24 and is connected with the damping spacer 21; and a detecting device provided on the housing 24 and detecting vibration of the core bar 100 by detecting vibration of the damping mount 25.

The damper provided by the embodiment can be applied to an overspeed testing machine for damping a core bar 100, and comprises a shell 24, a damping spacer 21, a damping seat 25 and a detection device, wherein the damping spacer 21 is wrapped on the outer side of the core bar 100 to reduce vibration of the core bar 100, the damping spacer 21 is arranged on the damping seat 25, the damping seat 25 is used for installing the damping spacer 21 and supporting the core bar 100 to prevent the core bar 100 from shaking, and the detection device is arranged on the shell 24 to monitor the vibration state of the whole damping seat or the overspeed testing machine system by detecting the vibration size and frequency of the damping seat 25 and timely make early warning information to ensure the safety of the damper and the overspeed testing machine.

The damper in the present embodiment further includes: the damping spacer bush 21 is used for being sleeved on the outer side of the core rod so as to reduce the vibration of the core rod; the first vibrator 22 is sleeved outside the damping spacer 21; the shell 24, the first vibrator 22 and the damping spacer 21 are arranged in the shell 24 to reduce the vibration of the core rod; the casing 24 is provided with an oil inlet 241 and an oil outlet, and the damping spacer 21 is provided with a first oil path 211, so that oil flows into the casing 24 from the oil inlet 241 and is discharged from the oil outlet after flowing through the first oil path 211.

The damper 20 in this embodiment includes a damping spacer 21, a first vibrator 22 and a housing 24, where the damping spacer 21 is cylindrical and is wrapped on a core rod to reduce vibration or shake of the core rod in the rotation process, the first vibrator 22 is also disposed on the outer side of the damping spacer 21, and the first vibrator 22 is cylindrical and wrapped on the outer side of the damping spacer 21 to further reduce vibration of the damping spacer 21, the damper 20 is provided with a housing 24, the damping spacer 21 and the first vibrator 22 are both disposed in the housing 24, the housing 24 is provided with an oil inlet 241, oil is selected from lubricating oil or damping oil, and the oil is introduced into the housing 24 from the oil inlet 241 and flows into the damping spacer 21 through a first oil path 211, and finally flows out from an oil outlet on the housing 24.

The damping spacer 21 includes: a core rod hole 212, wherein the core rod hole 212 is used for penetrating the core rod; the plurality of first through holes 213 are disposed around the core rod hole 212 such that oil flows from one end of the first through holes 213 to the other end of the first through holes 213.

As shown in fig. 8 and 9, in this embodiment, a core rod hole 212 is provided at the center of the damping spacer 21, the core rod hole 212 is a through hole, the size of which is matched with the size of the core rod, so that the core rod is inserted into the core rod hole 212, and in addition, an elastic member, such as rubber, may be provided on the inner wall of the core rod hole 212 as required, for improving the damping effect, and a circle of first through holes 213 are further provided on the damping spacer 21, and are uniformly distributed on the periphery of the core rod hole 212, so that the oil can pass through the damping spacer 21 through the first through holes 213.

The first vibrator 22 is provided with a second oil path 221, so that oil flows into the casing 24 from the oil inlet 241 and flows into the first oil path 211 after passing through the second oil path 221.

As shown in fig. 10 and 11, in this embodiment, the first vibrator 22 is further provided with a second oil path 221, so that the oil flows into the first oil path 211 through the second oil path 221 after flowing into the casing 24 from the oil inlet port 241, and finally flows out.

The second oil passage 221 includes: the plurality of second through holes 226 are arranged around the axle center of the first vibrator 22, and the oil outlet ends of the second through holes 226 are opposite to the oil inlet ends of the first oil way 211, so that the oil flows into the first oil way 211 from the oil inlet ends of the first oil way 211 after flowing through the second through holes 226.

As shown in fig. 10, the first vibrator 22 is provided with a plurality of second through holes 226, and the plurality of second through holes 226 form a second oil passage 221, and the second through holes 226 are holes extending from the upper end surface of the first vibrator 22 to the lower end surface.

The damper further includes: the second vibrator 23 is sleeved outside the first vibrator 22 to damp the core bar.

As shown in fig. 11, the damper 20 in the present embodiment further includes a second vibrator 23, and the second vibrator 23 is also cylindrical and sleeved on the outer side of the first vibrator 22 to perform one-step damping of the vibration caused by the core rod.

The second vibrator 23 is provided with a third oil path 231 so that oil enters the casing 24 from the oil inlet 241 and flows into the second oil path 221 through the third oil path 231. The third oil passage 231 includes: the plurality of third through holes 232 are arranged around the axis of the second vibrator 23, and the oil outlet end of the third through holes 232 is opposite to the oil inlet end of the second oil path 221, so that the oil flows into the second oil path 221 from the oil inlet end of the second oil path 221 after flowing through the third through holes 232.

As shown in fig. 12 and 13, the second vibrator 23 in the present embodiment is provided with a third oil passage 231, and the third oil passage 231 is composed of a plurality of third through holes 232.

The damper further includes: the damping seat 25 is provided with a fourth oil path 251 communicating with the second oil path 221 and the third oil path 231 to guide the oil from the third oil path 231 into the second oil path 221.

As shown in fig. 14 and 15, the damper 20 in the present embodiment further includes a damper seat 25 provided at a bottom end of the housing 24, a plurality of annular grooves provided on the damper for mounting the first vibrator 22 and the second vibrator 23, and a fourth oil passage 251 provided on the damper seat 25, the fourth oil passage 251 including a plurality of through holes for communicating the third oil passage 231 and the second oil passage 221 so that the first oil passage, the second oil passage and the third oil passage communicate.

The oil inlet ports 241 are provided in plurality, and the plurality of oil inlet ports 241 are provided at intervals on the housing 24 to simultaneously supply oil into the housing 24.

As shown in fig. 6, in this embodiment, a plurality of oil inlet ports 241 are provided on the housing 24 and are provided on the housing 24 at intervals, so that it is possible to satisfy that the plurality of oil inlet ports 241 simultaneously feed oil into the housing 24.

The damper in the present embodiment includes: a housing 24 for passing the core rod therethrough; the first vibrator 22 is arranged in the shell 24, and the first vibrator 22 is sleeved outside the core rod; the second vibrator 23, the second vibrator 23 is set up in the shell 24, the second vibrator 23 is used for covering and setting up in the outside of the first vibrator 22; the first vibration reducing portion 26, the first vibration reducing portion 26 is provided between the first vibrator 22 and the second vibrator 23 to reduce vibrations caused by the core bar.

The damper 20 in this embodiment can be applied to an overspeed testing machine for reducing vibration generated by a core bar, the damper 20 includes a housing 24, a first vibrator 22 and a second vibrator 23, the first vibrator 22 is in a cylindrical structure and is sleeved on the outer side of the core bar to reduce vibration caused by rotation of the core bar, the second vibrator 23 is arranged on the outer side of the first vibrator 22, a first vibration reduction portion 26 is arranged between the second vibrator 23 and the first vibrator 22 to reduce vibration transmission between the first vibrator 22 and the second vibrator 23, and the damper 20 of the present invention satisfies vibration reduction requirements of the overspeed testing machine by arranging the first vibrator 22, the second vibrator 23 and the first vibration reduction portion 26 to reduce vibration of the core bar layer by layer.

The casing 24 is provided with an oil inlet port 241, and the first damping portion 26 is a damping oil film, so that oil enters the casing 24 from the oil inlet port 241 to supply oil to the first damping portion 26.

As shown in fig. 6, in this embodiment, an oil inlet 241 is disposed on the housing 24 of the damper, and the first vibration reduction portion 26 is specifically a vibration reduction oil film, where the oil film is an oil film with a certain pressure, and the specific pressure is adjustable according to the requirement of the rotation speed.

The second vibrator 23 is provided with an oil through port 233, so that oil enters the shell 24 from the oil inlet port 241 and flows into the space between the first vibrator 22 and the second vibrator 23 through the oil through port 233 to form a vibration damping oil film.

As shown in fig. 6, the second vibrator 23 in the present embodiment is further provided with an oil through port 233, and oil enters the casing from an oil inlet port 241 on the casing 24 and enters between the second vibrator 23 and the first vibrator 22 through the oil through port 233 to form an oil film with a certain pressure so as to achieve the purpose of reducing vibration.

The damper further includes: and a seal assembly disposed between the first vibrator 22 and the second vibrator 23 to form a sealed space for sealing oil. The seal assembly includes: the first sealing ring 222, the first sealing ring 222 is arranged at one end of the first vibrator 22; a second seal ring 223, the second seal ring 223 being provided at the other end of the first vibrator 22; the first seal ring 222, the first vibrator 22, the second seal ring 223, and the second vibrator 23 are connected to form a sealed space. The first vibrator 22 is provided with a first mounting groove 224 and a second mounting groove 225, the first seal ring 222 is provided on the first mounting groove 224, and the second seal ring 223 is provided on the second mounting groove 225.

As shown in fig. 6 to 8, in this embodiment, in order to form an oil film between the first vibrator 22 and the second vibrator 23, a sealing assembly is further disposed between the first vibrator 22 and the second vibrator 23, the sealing assembly specifically includes a first sealing ring 222 and a second sealing ring 223, a space for sealing the oil film is enclosed between the first sealing ring 222, the second sealing ring 223, the first vibrator 22 and the second vibrator 23, two annular mounting grooves are respectively disposed at two ends of the first vibrator 22 for mounting the sealing assembly, a first mounting groove 224 and a second mounting groove 225, the first sealing ring 222 is disposed in the first mounting groove 224, and the second sealing ring 223 is disposed in the second mounting groove 225.

The damper further includes: and a second vibration reducing portion 27, the second vibration reducing portion 27 being provided between the second vibrator 23 and the case 24 to reduce vibrations caused by the core bar. The second vibration damping portion 27 is a rubber member.

As shown in fig. 6, the damper 20 in the present embodiment is further provided with a second vibration damping portion 27, and the second vibration damping portion 27 is physically vibration damped, and is made of elastic rubber.

The second vibrator 23 includes a first mounting portion and a second mounting portion, the rubber member includes a plurality of rubber rings including: a first rubber ring assembly 272, the first rubber ring assembly 272 being disposed on the first mounting portion; a second rubber ring member 273, the second rubber ring member 273 being provided on the second mounting portion; wherein the first rubber ring member 272 and the second rubber ring member 273 are provided on the second vibrator 23. The second vibrator 23 is provided with a first mounting step 234 and a second mounting step 235, the first mounting step 234 and the second mounting step 235 are arranged on the outer wall of the second vibrator 23 at intervals, a first mounting part is arranged between the first mounting step 234 and the second mounting step 235, and a second mounting part is arranged on one side, far away from the first mounting step 234, of the second mounting step 235.

In order to facilitate the installation of the second vibration reduction portion 27 in this embodiment, a first installation portion and a second installation portion are disposed on the second vibrator 23, specifically, one end of the outer wall of the second vibrator 23 is provided with an annular first installation step 234, an annular second installation step 235 is disposed in the middle of the outer wall of the second vibrator 23, a first rubber ring assembly 272 is disposed on the first installation portion surrounded by the first installation step 234 and the second installation step 235, and a second rubber ring assembly 273 is disposed on the second installation portion on one side of the second installation step 235 away from the first installation step 234.

The damper in this embodiment can be used on an overspeed testing machine to reduce the vibration of the core bar 100, and includes a housing 24, a damping component for reducing the vibration, and a detection device for detecting the vibration of the housing, wherein the housing 24 is disposed on the core bar 100, the damping component is disposed in the housing 24 and wrapped around the core bar 100 to reduce the vibration of the core bar 100 when the core bar 100 rotates, and the detection device is disposed on the housing 24 to determine the vibration state of the core bar 100 or the whole system by detecting the vibration of the housing 24, and can alarm or cut off the power supply in time when detecting that the vibration of the housing 24 exceeds a certain range, so as to ensure the safety of the overspeed testing machine.

The damping assembly comprises a damping mount 25, and the detection means comprises a vibration sensor 41, the vibration sensor 41 being connected to the damping mount 25 to detect vibrations of the damping mount 25.

As shown in fig. 13 and 14, the damping assembly in this embodiment includes a damping seat 25, the damping seat 25 is disposed in the housing 24, the damping assembly further includes a damping spacer and a vibration damper for damping, the damping spacer is wrapped on the core rod 100, the vibration damper is wrapped outside the damping spacer, the damping seat 25 is disposed on the damping spacer and the bottom of the vibration damper, and the damping seat 25 and the damping spacer and the vibration damper form a damping assembly together to reduce the vibration generated when the core rod 100 rotates, and the detection head of the vibration sensor 41 is disposed toward the damping seat 25 to detect the magnitude or frequency of the vibration generated by the damping seat 25.

The housing 24 includes a chassis 243, and the damper further includes: and a fixing assembly provided on the bottom chassis 243 to fix the vibration sensor 41.

As shown in fig. 15, the housing 24 in the present embodiment further includes a chassis 243, and a fixing member for fixing the vibration sensor 41 is provided on the chassis 243 to fix the vibration sensor 41 to the chassis 243.

The fixing assembly comprises a first locating piece 42, the first locating piece 42 is fixed on a chassis 243, a locating hole 421 is formed in the first locating piece 42, and the vibration sensor 41 is arranged in the locating hole 421 in a penetrating mode to locate.

As shown in fig. 15 and 17, the fixing assembly includes a first positioning member 42, a plurality of positioning holes 421 may be formed in the first positioning member 42, and a plurality of vibration sensors 41 may be simultaneously inserted into the first positioning member 42 to detect the damping seat 25, and a plurality of connection plates may be further formed on the first positioning member 42 to be fixed on the chassis 243.

The securing assembly further includes: a locking member 43, the locking member 43 being provided on the chassis 243 for locking the vibration sensor 41 to the chassis 243. The locking member 43 includes: a first locking plate 431 and a second locking plate 432, the first locking plate 431 being rotatably connected to the second locking plate 432, the first locking plate 431 having a locking position and an unlocking position; wherein, when the first locking plate 431 rotates to the locking position, the vibration sensor 41 is locked, and when the first locking plate 431 rotates to the opening position, the vibration sensor 41 is taken out. The locker 43 further includes a locking screw 433, and when the first locking plate 431 is rotated to the locking position, the locking screw 433 fixes the first locking plate 431 to the second locking plate 432 to position the vibration sensor 41.

As shown in fig. 15 and 18, the fixing assembly in this embodiment further includes a locking member 43, the locking member 43 is used for locking and fixing the vibration sensor 41 to prevent vibration, the locking member 43 includes a first locking plate 431 and a second locking plate 432, one end of the first locking plate 431 and one end of the second locking plate 432 are hinged, the other end of the first locking plate 431 is detachably connected through a locking screw 433, when the vibration sensor 41 is mounted, the first locking plate 431 is rotated to a locking position, the first locking plate 431 is locked on the second locking plate 432 through the locking screw 433, when the vibration sensor 41 needs to be dismounted, the locking screw 433 is opened, the first locking plate 431 is rotated to an opening position, and the vibration sensor 41 is taken out.

The securing assembly further includes a second positioning member 44, the second positioning member 44 being secured to the chassis 243 for securing the locking member 43.

As shown in fig. 16, the fixing assembly in this embodiment is further provided with a second positioning member 44, the second positioning member 44 is fixed on the chassis 243, and the second locking plate 432 is connected to the second positioning member 44 and is fixed on the chassis 243 by the second positioning member 44.

The damper further includes: the bearing assembly 45 is sleeved on the core rod 100, and the fixing assembly is connected with the core rod 100 through the bearing assembly 45.

As shown in fig. 15, the damper in the present embodiment further includes a bearing assembly 45, and the bearing assembly 45 is disposed between the inner side of the first positioning member 42 and the outer side of the core rod 100 to support the core rod 100, prevent the core rod 100 from swinging, and achieve connection between the fixing assembly and the core rod 100.

Also provided in this embodiment is a locking mechanism for unlocking or locking a cover plate 50 of a test chamber of a vacuum apparatus, referring to fig. 19 to 24, the locking mechanism includes: the locking pieces 51 are arranged on the cavity 58 of the test cavity at intervals, the locking pieces 51 are provided with an avoidance position and a locking position, and the locking pieces 51 are movably arranged between the avoidance position and the locking position; a driving device disposed on the cavity 58 to simultaneously drive the plurality of locking members 51 to move; wherein, a plurality of retaining members 51 are disposed around the cover 50, when the retaining members 51 move to the locking position, the retaining members 51 lock the cover 50 on the cavity 58, so that a sealed space is formed between the cover 50 and the cavity 58, and when the retaining members 51 move to the avoiding position, the cover 50 can move relative to the cavity 58.

The locking mechanism of this embodiment is mainly used on the test chamber of vacuum apparatus to sealer apron 50 is used, this locking mechanism includes a plurality of retaining members 51 and drive arrangement, drive arrangement can drive a plurality of retaining members 51 simultaneously with apron 50 locking on the test chamber, with the space that seals in the formation test chamber, thereby guarantee the vacuum in the test chamber after the evacuation, this retaining member 51 has two kinds of operating condition, apron 50 and cavity 58 are inseparable to combine when retaining member 51 removes to the locking position, unable removal, when retaining member removes to dodging the position, apron 50 can remove with cavity 58 relatively, so that change experimental assembly and impeller in the test chamber, make apron 50 and cavity 58 zonulae occludens through setting up retaining member 51 in the experimentation, it can not take place to leak when testing to have guaranteed the test chamber, the vacuum is better.

The locking mechanism further includes: mounting plate 52, mounting plate 52 is disposed in cavity 58, a plurality of locking members 51 are disposed on mounting plate 52 at intervals, and each locking member 51 is rotatably disposed with respect to mounting plate 52 for rotation between the retracted position and the locked position.

As shown in fig. 19 to 21, the locking mechanism in this embodiment further includes a mounting plate 52, the mounting plate 52 is disposed around the cover plate 50, the mounting plate 52 is preferably in a circular plate shape, each locking member 51 is uniformly distributed on the mounting plate 52, and each locking member 51 can independently rotate relative to the mounting plate 52.

The locking mechanism further includes: the limiting component 53, the limiting component 53 is arranged on the mounting plate 52 to limit the locking piece 51 to rotate between the avoiding position and the locking position.

As shown in fig. 20, in order to ensure that the locking member 51 moves between the retracted position and the locking position, the locking mechanism of this embodiment is provided with a limiting assembly 53, and preferably, the limiting assembly 53 includes two limiting pins, which are respectively disposed at two sides of the locking member 51, so as to limit the rotation of the locking member 51.

The locking mechanism further includes: the plurality of positioning shafts 54, the plurality of positioning shafts 54 are all disposed on the mounting plate 52, the plurality of locking members 51 are disposed in one-to-one correspondence with the plurality of positioning shafts 54, and each locking member 51 is rotatably connected with the mounting plate 52 through a corresponding positioning shaft 54.

As shown in fig. 20, in this embodiment, in order to enable the locking members 51 to rotate with the mounting plate 52, a positioning shaft 54 is provided in the middle of each locking member 51, the positioning shaft 54 is fixed to the mounting plate 52, and the locking members 51 are provided with hinge holes to be engaged with the positioning shafts 54 to enable rotation.

The driving device includes: a driving cylinder 55; the rotating assembly 56, the driving cylinder 55 is connected with the rotating assembly 56, and the rotating assembly 56 is connected with each locking piece 51; wherein, the driving cylinder 55 drives the rotating assembly 56 to rotate so as to drive each locking member 51 to rotate.

The driving device may include a plurality of driving cylinders 55, as shown in fig. 1, and the driving device in this embodiment is preferably provided with one driving cylinder 55, the locking mechanism is further provided with a cylinder mounting support on the test chamber, the driving cylinder 55 is mounted on the cylinder mounting support, and a piston rod of the driving cylinder is in driving connection with each locking member 51 to simultaneously drive the plurality of locking members 51 to move.

The rotating assembly 56 includes: a driving plate 561, the driving cylinder 55 being connected to the driving plate 561; the plurality of pull rods 562 are arranged in a one-to-one correspondence with the plurality of locking members 51, and the plurality of pull rods 562 are respectively connected with the driving plate 561 to drive the corresponding locking members 51 to rotate under the driving of the driving plate 561.

As shown in fig. 21 and 22, the rotating assembly 56 in the present embodiment specifically includes a drive plate 561 and a plurality of tie rods 562. The driving plate 561 is disposed around the mounting plate 52, and the plurality of tie rods 562 are disposed in one-to-one correspondence with the plurality of locking members 51, and one end of each tie rod 562 is connected to the driving plate 561 and the other end is connected to one side of the corresponding locking member 51 to drive the locking member 51 to rotate around the positioning shaft.

The locking mechanism further includes: a plurality of bearing assemblies 57, the plurality of bearing assemblies 57 being disposed on the cavity 58 at intervals, each bearing assembly 57 being in contact with the drive plate 561 such that the drive plate 561 rotates under the guidance of the bearing assemblies 57. The bearing assembly 57 includes: a bearing support 571, the bearing support 571 being fixed to the cavity 58; a bearing 572, the bearing 572 being rotatably provided on the bearing holder 571 to rotate the bearing 572 in contact with the driving plate 561 when the driving plate 561 rotates.

The locking mechanism of the present invention is further provided with a plurality of bearing assemblies on the mounting plate 52, and the bearing assemblies 57 are disposed around the inner side of the driving plate 561 and contact the inner wall of the driving plate 561 to ensure the rotation of the driving plate 561 in the guiding direction.

The driving device includes: a drive motor 62; the drive screw 63, the drive motor is connected to the drive screw 63, the lift arm 61 is connected to the drive screw 63, and the drive motor 62 drives the lift arm 61 to move through the drive screw 63.

As shown in fig. 18, the driving device in this embodiment includes a driving motor 62 and a driving screw 63, a screw nut is provided between the driving screw 63 and the lifting arm 61, and the lifting arm 61 is driven by the screw nut to move up and down.

The lifting mechanism comprises: a guide wheel assembly 64, the guide wheel assembly 64 being provided on the lift arm 61 and contacting the rail assembly 68, the lift arm 61 being moved along the rail assembly 68 by the guide wheel assembly 64.

As shown in fig. 18, the lifting mechanism in the present embodiment includes a guide wheel assembly 64, the guide wheel assembly 64 includes a plurality of guide wheels provided between the lifting arm 61 and the rail assembly 68 at intervals, and the driving screw 63 drives the lifting arm 61 to move up and down along the extending direction of the rail assembly 68.

The lifting mechanism comprises: and a limiting assembly disposed on the rail assembly 68 to limit a moving distance of the lift arm 61 on the rail assembly 68.

The lifting mechanism in this embodiment is further provided with a limiting assembly, which includes an upper limiting plate, a lower limiting plate and a travel switch, so as to limit the movement range of the lifting arm 61.

The lifting mechanism further comprises a supporting seat 65, and a guide rail assembly 68 is arranged on the supporting seat 65; and a rotation assembly disposed between the rail assembly 68 and the support base 65 such that the rail assembly 68 is rotatably coupled to the support base 65. The rotating assembly includes: the bearing 66 is turned, and the guide rail assembly 68 is connected to the supporting seat 65 through the bearing 66, so that when the cover plate 50 is lifted, the lifting arm 61 drives the cover plate 50 to rotate, so as to be away from the cavity 58 of the test cavity.

As shown in fig. 1, the lifting mechanism in this embodiment is further provided with a supporting seat 65 below the lifting arm 61, and the guide rail assembly 68 is rotatably disposed on the supporting seat 65, so as to realize that the guide rail assembly 68 is rotatably connected with the supporting seat 65, and is further provided with a rotating assembly, wherein the rotating assembly is a rotating bearing 66, the lifting arm 61 drives the cover plate 50 to move upwards after leaving the cavity 58, and after moving in place, a worker can push the lifting arm 61 to rotate around the guide rail assembly 68 on one side of the lifting arm 61, so as to move the cover plate 50 to one side of the cavity 58, thereby facilitating replacement of impellers.

The lifting mechanism further comprises: the connecting plate 67, the connecting plate 67 is set up between supporting seat 65 and cavity 58, in order to connect supporting seat 65 and test cavity.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

the testing machine is mainly used for performing an overspeed test on an impeller to detect the rotating speed of the impeller, and mainly comprises a speed regulating device 1, a damper 20 and a testing cavity 2, wherein the speed regulating device 1 is used for providing rotating power for the impeller and regulating the rotating speed of the impeller, the damper 20 is wrapped on one side of a core rod 100 so as to reduce the vibration of the core rod 100 when the core rod 100 rotates, the impeller is placed in the testing cavity 2 when the overspeed testing machine is used for testing, the testing cavity is in a vacuum environment, the impeller is arranged in the testing cavity and rotates so as to avoid resistance caused by air, the impeller can rotate at an ultra-high speed, and the problem that the ultra-high speed impeller in the prior art cannot be tested when rotating is solved.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (25)

1. A testing machine for overspeed testing of an impeller, the testing machine comprising:

the speed regulating device (1) comprises a core bar (100), and the core bar (100) is connected with the impeller to drive the impeller to move;

-a damper (20), the damper (20) being connected to the core rod (100) to reduce vibrations of the core rod (100);

a test chamber (2), the impeller being located within the test chamber (2), the test chamber (2) being configured to provide a vacuum environment for the impeller to rotate in the vacuum environment of the test chamber (2) to reduce drag;

The testing machine further comprises a lifting mechanism, wherein the lifting mechanism is connected with a cover plate (50) on the testing cavity (2) so as to drive the cover plate (50) to be connected with or separated from a cavity (58) of the testing cavity (2);

the test cavity (2) comprises a locking mechanism, wherein the locking mechanism is used for locking a cover plate (50) of the test cavity (2) on a cavity body (58) of the test cavity (2);

the locking mechanism includes:

a plurality of locking pieces (51), wherein the locking pieces (51) are arranged on a cavity (58) of the test cavity (2) at intervals, the locking pieces (51) are provided with an avoidance position and a locking position, and the locking pieces (51) are movably arranged between the avoidance position and the locking position;

the driving device is arranged on the cavity (58) to drive the locking pieces (51) to move at the same time;

the locking pieces (51) are arranged around the cover plate (50), when the locking pieces (51) move to the locking position, the locking pieces (51) lock the cover plate (50) on the cavity (58), so that a sealed space is formed between the cover plate (50) and the cavity (58), and when the locking pieces (51) move to the avoiding position, the cover plate (50) can move relative to the cavity (58).

2. The testing machine of claim 1, wherein said lifting mechanism comprises:

a rail assembly (68);

a lift arm (61), the lift arm (61) being liftably disposed on the rail assembly (68);

a driving device connected to the lift arm (61) to drive the lift arm (61) to rise or fall;

the lifting arm (61) is connected with the cover plate (50), and the driving device drives the lifting arm (61) to ascend or descend along the guide rail assembly (68) so as to drive the cover plate (50) to move.

3. The testing machine of claim 2, further comprising:

a support base (65), the guide rail assembly (68) being disposed on the support base (65);

-a tank (60), said tank (60) being arranged on the side of the lifting arm (61) remote from the test chamber for supplying oil into the damper (20).

4. The machine according to claim 1, characterized in that the speed regulating device (1) comprises a mounting housing (10) and a transmission, the mounting housing (10) having a mounting cavity for mounting the transmission, the transmission comprising a gear assembly, the mounting cavity comprising:

A first oil chamber (11);

a second oil chamber (12), the gear assembly being disposed within the second oil chamber (12);

the first oil cavity (11) is communicated with the second oil cavity (12), a second oil inlet (13) is formed in the side wall of the second oil cavity (12), oil enters the second oil cavity (12) through the second oil inlet (13) to be sprayed into the gear assembly for lubrication, an oil outlet (14) is further formed in the mounting cavity, and after the oil in the mounting cavity reaches a preset position, the oil outlet (14) discharges oil so that the gear assembly cannot be completely immersed by the oil in the second oil cavity (12) to reduce the resistance of the gear assembly during rotation.

5. The testing machine of claim 4, wherein said gear assembly comprises:

a driving gear (30), wherein the driving gear (30) is used for being connected with an output shaft of a motor so as to enable the motor to drive the driving gear (30) to rotate;

a driven gear (40), wherein the driving gear (30) is meshed with the driven gear (40) to drive the driven gear (40) to rotate;

the driving gear (30) and the driven gear (40) are both positioned in the second oil cavity (12), the driven gear (40) is in driving connection with the impeller, the reference diameter of the driving gear (30) is larger than that of the driven gear (40), and the motor is in driving connection with the impeller through the gear assembly so as to achieve speed-increasing driving of the impeller.

6. The testing machine of claim 5, wherein said transmission mechanism further comprises:

a power input wheel (150), wherein the motor is connected with the power input wheel (150) to drive the power input wheel (150) to rotate;

the power input shaft (160), the power input shaft (160) includes first connecting portion (161) and second connecting portion (162), power input wheel (150) with first connecting portion (161) are connected, driving gear (30) with second connecting portion (162) are connected, the motor passes through power input wheel (150) drive power input shaft (160) rotate, so as to drive power input shaft (160) drive driving gear (30) rotate.

7. The testing machine according to claim 6, wherein the first connecting portion (161) is a conical shaft, the power input wheel (150) is provided with a conical hole matched with the conical shaft, the conical shaft is inserted into the conical hole of the power input wheel (150), and the diameter of one end of the conical shaft, which is close to the second connecting portion (162), is larger than the diameter of one end of the conical shaft, which is far away from the second connecting portion (162).

8. The machine according to claim 7, characterized in that an end of the first connecting portion (161) remote from the second connecting portion (162) is provided with a positioning member (70), the positioning member (70) being connected with the power input shaft (160) to position the power input wheel (150) on the power input shaft (160).

9. The machine according to claim 1, wherein the damper (20) comprises:

a shell (24), wherein the core bar (100) is arranged in the shell (24) in a penetrating way;

a damping spacer (21), the damping spacer (21) being disposed within the housing (24) to reduce vibration of the core rod (100);

the damping seat (25) is arranged in the shell (24) and is connected with the damping spacer bush (21);

and the detection device is arranged on the shell (24) and detects the vibration of the core bar (100) by detecting the vibration of the damping seat (25).

10. The testing machine according to claim 9, wherein the casing (24) is provided with an oil inlet port (241) and an oil outlet port, and the damping spacer (21) is provided with a first oil path (211) so that oil flows into the casing (24) from the oil inlet port (241) and flows through the first oil path (211) and then is discharged from the oil outlet port.

11. The machine according to claim 10, characterized in that said damping spacer (21) comprises:

a core rod hole (212), wherein the core rod hole (212) is used for penetrating the core rod (100);

the plurality of first through holes (213) are arranged around the core rod hole (212) so that oil flows from one end of the first through holes (213) to the other end of the first through holes (213).

12. The machine according to claim 10, wherein the damper (20) further comprises:

the first vibrator (22), first vibrator (22) set up in casing (24), first vibrator (22) are used for the cover to establish in core bar (100) outside.

13. The testing machine according to claim 12, wherein a second oil path (221) is provided on the first vibrator (22) so that oil flows into the housing (24) from the oil inlet port (241) and flows into the first oil path (211) after passing through the second oil path (221).

14. The machine according to claim 13, wherein the damper (20) further comprises:

and the second vibrator (23) is sleeved outside the first vibrator (22) so as to damp the core bar (100).

15. The testing machine according to claim 14, wherein a third oil path (231) is provided on the second vibrator (23) so that oil enters the housing (24) from the oil inlet port (241) and flows into the second oil path (221) through the third oil path (231).

16. The machine according to claim 15, characterized in that a fourth oil passage (251) communicating with the second oil passage (221) and the third oil passage (231) is provided on the damping seat (25) to guide the oil from the third oil passage (231) into the second oil passage (221).

17. The machine according to claim 14, wherein the damper (20) further comprises:

a first vibration reduction portion (26), the first vibration reduction portion (26) being disposed between the first vibrator (22) and the second vibrator (23) to reduce vibration caused by the core bar (100).

18. The testing machine according to claim 17, wherein an oil inlet port (241) is provided on the housing (24), and the first vibration reduction portion (26) is a vibration reduction oil film, so that oil enters the housing (24) through the oil inlet port (241) to supply oil to the first vibration reduction portion (26).

19. The machine according to claim 14, wherein the damper (20) further comprises:

and a second vibration reduction portion (27), wherein the second vibration reduction portion (27) is arranged between the second vibrator (23) and the housing (24) to reduce vibration caused by the core bar (100).

20. The machine according to claim 19, wherein the second vibration damper (27) is a rubber component.

21. The machine according to claim 19, characterized in that the detection means comprise a vibration sensor (41), the vibration sensor (41) being connected with the damping seat (25) to detect vibrations of the damping seat (25).

22. The machine according to claim 21, wherein the housing (24) includes a chassis (243), the damper further comprising:

and a fixing assembly provided on the chassis (243) to fix the vibration sensor (41).

23. The machine according to claim 22, wherein the damper (20) further comprises:

the bearing assembly (45) is sleeved on the core rod (100), and the fixing assembly is connected with the core rod (100) through the bearing assembly (45).

24. The testing machine of claim 1, wherein said drive means comprises:

a drive cylinder (55);

the driving cylinder (55) is connected with the rotating assembly (56), and the rotating assembly (56) is connected with each locking piece (51);

wherein the driving cylinder (55) drives the rotating assembly (56) to rotate so as to drive each locking piece (51) to rotate.

25. The machine according to claim 24, wherein the rotating assembly (56) comprises:

a drive plate (561), the drive cylinder (55) being connected to the drive plate (561);

the plurality of pull rods (562) are arranged in a one-to-one correspondence with the plurality of locking pieces (51), and the plurality of pull rods (562) are respectively connected with the driving plate (561) so as to drive the corresponding locking pieces (51) to rotate under the driving of the driving plate (561).