CN116818161A - Hole disc type hydraulic dynamometer - Google Patents

Abstract

The invention relates to the technical field of hydraulic power meters, in particular to a hole disc type hydraulic power meter which comprises a support assembly, a shell assembly, a stator assembly, a rotor assembly, a water inlet valve assembly, a water outlet valve assembly, a calibration device and a rotation speed measuring device. The Kong Panshi hydraulic dynamometer is installed in series through the stator disc and the rotor sheet, after being connected in series, the single rotor is small in power absorption density, strong in cavitation resistance and small in high-speed centrifugal stress, and the series installation enables the testing power range to be wide, the allowable rotating speed to be high, and the testing requirements of high-power high-speed rotating machinery such as a heavy gas turbine and an aeroengine can be well met.

Description

Hole disc type hydraulic dynamometer

Technical Field

The invention relates to the technical field of hydraulic dynamometers, in particular to a hole disc type hydraulic dynamometer.

Background

With the autonomous development of high-power heavy-duty gas turbines and aeroengines, various tests such as product performance development, calibration, matching, simulation, reliability and durability performance and the like are required to be carried out, and a power performance test of the engine is simulated on a test bed through a power loading device.

Because of the advantages of low unit cost, compact size, small inertia, rapid transient response, large absorption load and high-power operation of the hydraulic dynamometer, the hydraulic dynamometer is always an important device for measuring and diagnosing the power performance of a heavy-duty gas turbine and an aeroengine.

When the hydraulic dynamometer measures the power of the prime motor, the rotor rotates along with the prime motor, water entering the dynamometer is stirred, torque is transmitted to the stator and the shell by the water, the stator shell is driven to rotate at a small angle relative to the dynamometer base, the movement trend of the stator and the shell is prevented by the tension and compression sensor assembly, the tension and compression force is measured by the tension and compression sensor, and the power of the prime motor can be obtained by combining the length of a moment arm and the rotating speed.

At present, the domestic traditional hydraulic dynamometer is limited by factors such as high-speed cavitation, high-speed centrifugal stress, higher rotor dynamics, high-speed bearing matching, high-speed bearing lubrication, high-speed sealing and the like, and cannot well meet the development and test requirements of a high-power high-speed heavy-duty gas turbine and an aeroengine.

Disclosure of Invention

In order to solve the technical problems in the background technology, the invention provides a hole disc type hydraulic dynamometer.

The invention provides a hole disc type hydraulic dynamometer, which comprises a support assembly, a shell assembly, a stator assembly, a rotor assembly, a water inlet valve assembly, a water outlet valve assembly, a calibration device and a rotation speed measuring device, wherein:

the shell assembly is arranged on the support assembly through a swing bearing and can swing around the horizontal axial direction;

the stator assembly comprises stator discs and drainage guide rings which are fixedly connected in series in the inner cavity of the shell assembly and are distributed at intervals, wherein the stator discs are provided with stator power absorption holes, water inlets and central through holes, the inner cavity of the drainage guide rings forms a drainage channel, and the bottoms of the drainage guide rings are provided with drainage holes;

the rotor assembly comprises a rotating shaft, rotor sheets and spacer rings which are connected in series and fixed on the rotating shaft and are distributed at intervals, the rotor sheets are arranged in the drainage channel in a one-to-one correspondence manner, rotor power suction holes are formed in the rotor sheets, and a high-speed contact sealing structure and a high-speed bearing lubrication sealing structure are arranged between the rotating shaft and the shell assembly;

the water inlet valve assembly is connected with a water inlet on the shell assembly, and the water outlet valve assembly is connected with a water outlet on the shell assembly;

the calibration device is arranged on the support assembly and connected with two sides of the shell assembly, and is used for measuring the torque of the shell assembly; the rotation speed measuring device is used for detecting the rotation speed of the rotor assembly.

Preferably, the shell assembly comprises a middle shell, side shells and bearing shells, wherein the two side shells are respectively locked and fixed at two ends of the middle shell through screw members, and the two bearing shells are respectively locked and fixed at the outer ends of the two side shells through screw members.

Preferably, a first vent hole penetrating through the edge of the stator disc to the water inlet channel is formed in the stator disc of the stator assembly, a first vent pipe is arranged on the middle shell and penetrates into the inner cavity of the middle shell from the outer part of the middle shell, the first vent pipe is communicated with the first vent hole on the stator disc, and a first micro-vacuum balance valve is arranged at the outer end of the first vent pipe.

Preferably, the stator plate is further provided with second vent holes penetrating through the edges of the stator plate to two axial ends, the side shell is provided with second vent pipes, the second vent pipes penetrate into the inner cavity of the middle shell from the outside of the side shell, the inner ends of the second vent pipes are communicated with the second vent holes, and the outer ends of the second vent pipes are provided with second micro-vacuum balance valves.

Preferably, a cavitation detecting rod is respectively arranged on the two side shells of the shell assembly, and the inner ends of the two cavitation detecting rods are respectively positioned at the two ends of the stator assembly.

Preferably, the rotating shaft of the rotor assembly is provided with a non-circular triangle cam section for mounting the rotor sheet and the spacing ring, and the rotor sheet and the spacing ring are respectively provided with a non-circular triangle central hole matched with the non-circular triangle cam section.

Preferably, the two ends of the non-circular triangle cam section of the rotating shaft are provided with cylindrical sections for mounting the high-speed contact sealing structure and the high-speed bearing lubrication sealing structure.

Preferably, the rotor assembly has splines at both ends of a rotating shaft, and the rotating shaft is provided with a coupling through the splines and a screw.

Preferably, the high-speed contact seal structure comprises a water throwing ring and a contact seal assembly, a rotary seal seat and the water throwing ring of the contact seal assembly are sequentially sleeved on a rotating shaft from inside to outside, the rotary seal seat and the water throwing ring are axially positioned through pin shaft connection, a seal ring is arranged between the rotary seal seat and the water throwing ring, the contact seal assembly is fixed with a side shell through an outer ring of a fixed seal seat, a cooling water hole is formed between the fixed seal seat and the side shell, a seal shaft sleeve and a spring seat are installed on an inner ring of the fixed seal seat, the seal shaft sleeve is matched with the outer ring of the water throwing ring, a seal stationary ring is nested on the spring seat, the spring seat is abutted against the end face of the rotary seal seat through the end face of the seal stationary ring, and a radial through hole is further formed in the fixed seal seat, so that a gap between the outer ring of the rotary seal seat and the inner ring of the fixed seal seat is communicated with the cooling water hole.

Preferably, the side shell is provided with a sealing cooling water inlet channel and a sealing water leakage channel, the sealing cooling water inlet channel is communicated with the cooling water hole, and the sealing water leakage channel penetrates through the bottom of the side shell to the outer side of the fixed sealing seat.

Preferably, the high-speed bearing lubrication sealing structure comprises an inner lubricating oil seal, a high-speed bearing and an outer lubricating oil seal which are sequentially arranged between the cylindrical section of the rotating shaft and the bearing shell from inside to outside.

Preferably, the bearing shell is provided with an oil spraying pipe penetrating from the outer side of the bearing shell to a position between the lubricating oil outer seal and the high-speed bearing, the side shell is provided with an oil collecting groove positioned at the outer side of the lubricating oil inner seal, the bearing shell is provided with an oil return hole, the oil collecting groove is communicated with the inner side of the lubricating oil outer seal through the oil return hole, and the bearing shell is also provided with a lubricating vacuum pumping oil return duct communicated with the oil collecting groove.

Preferably, the water inlet valve assembly comprises an electrohydraulic servo control butterfly valve and a water inlet flexible connecting pipe, the electrohydraulic servo control butterfly valve is fixedly arranged on a bracket of the support assembly, and the water inlet flexible pipe is connected between the electrohydraulic servo control butterfly valve and a water inlet of the middle shell.

Preferably, the drainage valve comprises an electrohydraulic servo control sleeve regulating valve, a drainage flexible connecting pipe and a drainage elbow pipe, wherein the electrohydraulic servo control sleeve regulating valve is fixedly arranged on a supporting seat of the support assembly through a mounting flange, the drainage flexible connecting pipe is connected with a water outlet of the middle shell, and the drainage elbow pipe is connected between the flexible connecting pipe and the electrohydraulic servo control sleeve regulating valve.

Preferably, the calibration device comprises a force measuring arm assembly, a pre-tightening arm assembly and a calibration arm assembly, wherein the force measuring arm assembly is arranged on one side of the shell assembly, and the pre-tightening arm assembly and the calibration arm assembly are arranged on the other side of the shell assembly, wherein:

the force measuring arm assembly is provided with a tension pressure sensor for measuring the torque born by the shell assembly;

the pre-tightening arm assembly is provided with an elastic energy storage piece and a length adjusting piece, and the length of the elastic energy storage piece can be adjusted through the length adjusting piece so that the elastic energy storage piece can apply pre-tightening force to the shell assembly;

the calibration arm assembly is provided with a force transducer and an energy storage force adjusting piece, and static calibration pulling force or pressure applied to the shell assembly by the calibration arm assembly can be adjusted through the energy storage force adjusting piece.

Preferably, the rotation speed measuring device comprises a speed measuring sensor and a speed measuring gear, the speed measuring gear is coaxially sleeved on the circumference of the rotating shaft, and the speed measuring sensor is positioned on one side of the speed measuring gear.

According to the invention, the Kong Panshi hydraulic dynamometer is installed in series through the stator disc and the rotor sheet, after the series connection, the single rotor has small power absorption density, strong cavitation resistance and small high-speed centrifugal stress, and the series connection installation ensures that the testing power range is wide, the allowable rotating speed is high, and the testing requirements of high-power high-speed rotating machinery such as a heavy-duty gas turbine and an aeroengine can be well met.

Drawings

Fig. 1 is a schematic structural diagram of a Kong Panshi hydraulic dynamometer according to an embodiment;

FIG. 2 is a schematic right-hand view of the Kong Panshi hydraulic dynamometer of FIG. 1;

FIG. 3 is a schematic left-hand view of the Kong Panshi hydraulic dynamometer of FIG. 1;

FIG. 4 is a cross-sectional view of a housing assembly, stator assembly, and rotor assembly in an embodiment;

FIG. 5 is a schematic side view of a housing assembly in an embodiment;

FIG. 6 is a schematic structural view of a stator assembly and a rotor assembly in an embodiment;

FIG. 7 is a perspective view of a stator plate from a front perspective in an embodiment;

FIG. 8 is a cross-sectional view of a stator plate in an embodiment;

FIG. 9 is a rear view of a stator plate in an embodiment;

FIG. 10 is a schematic view of a structure of a rotating shaft according to an embodiment;

FIG. 11 is a side view of the spindle of FIG. 10;

FIG. 12 is a schematic view of the structure of a spacer ring in an embodiment;

FIG. 13 is a schematic structural view of a rotor sheet in an embodiment;

FIG. 14 is a cross-sectional view of the rotor sheet of FIG. 13;

FIG. 15 is a schematic view of a high-speed contact seal structure in an embodiment;

FIG. 16 is a schematic illustration of a high speed bearing lubrication seal arrangement in an embodiment;

FIG. 17 is a schematic view of the force arm assembly and pretension arm assembly of the calibration apparatus of the embodiment mounted on a dynamometer;

FIG. 18 is a schematic view of the pretensioning arm assembly of the calibration apparatus of FIG. 17;

FIG. 19 is a schematic view of a force arm assembly and calibration arm assembly of the calibration device of the embodiment mounted on a dynamometer;

FIG. 20 is a schematic view of the calibration arm assembly of the calibration device of FIG. 17;

FIG. 21 is a schematic front view of a multi-stage tandem hydraulic dynamometer according to an example;

FIG. 22 is a schematic side view of the multi-stage tandem hydraulic dynamometer of FIG. 21;

fig. 23 is a schematic top view of the multistage tandem hydraulic dynamometer of fig. 21.

Detailed Description

Referring to fig. 1 to 23, a hole-disc hydraulic dynamometer according to an embodiment of the present invention includes a support assembly 100, a housing assembly 200, a stator assembly 300, a rotor assembly 400, a water intake valve assembly 500, a water discharge valve assembly 600, a calibration device 700, and a rotation speed measuring device 800. Wherein:

the housing assembly 200 is mounted on the stand assembly 100, and the housing assembly 200 is capable of swinging on the stand assembly 100 about a horizontal axis; the stator assembly 300 and the rotor assembly 400 are installed in the shell assembly 200, two ends of a rotating shaft 410 of the rotor assembly 400 penetrate through the shell assembly 200 along the swinging axial direction of the shell assembly 200, and a high-speed contact sealing structure and a high-speed bearing lubrication sealing structure are further arranged between the rotating shaft 410 of the rotor assembly 400 and the shell assembly 200; the shell assembly 200 is provided with a water inlet 211 and a water outlet 212, the water inlet valve assembly 500 is connected with the water inlet 211, and the water discharge valve assembly 600 is connected with the water outlet 212; the calibration device 700 is mounted on the support assembly 100 and connected to both sides of the housing assembly 200 to measure torque of the housing assembly 200; the rotation speed measuring device 800 is used for detecting the rotation speed of the rotor assembly 400.

The working principle of the hydraulic dynamometer is as follows: the rotating shaft 410 of the rotor assembly 400 is connected with the engine to be tested, the rotor assembly 400 is driven to rotate when the engine is started, water flows into the inner cavity of the shell assembly 200 through the water inlet 211, the rotor assembly 400 drives the water to swing towards the inner wall of the shell assembly 200 under the action of centrifugal force, and the shell assembly 200 swings under the impact of the water. The water impacts the inner wall of the shell assembly, the friction resistance of the inner wall reduces the speed, kinetic energy is paid, the absorbed mechanical energy is changed into heat energy, and finally the temperature of the water is increased. Because the swing speed of the housing assembly 200 is slower than the rotation speed of the rotor assembly 400 due to the friction between the water and the inner wall, the water is required to prevent the rotor assembly 400 from rotating to generate a resisting moment, the resisting moment directly acts on the engine through the rotor assembly 400 to form the load of the engine, or the water absorbs the power of the engine, the load can be controlled by adjusting the water inlet and outlet amount, therefore, the hydraulic dynamometer can be used for measuring the output torque or the driving torque of the engine, and then the output power or the driving power of the engine can be calculated by matching with the measured rotation speed of the rotor assembly 400.

The Kong Panshi hydraulic dynamometer will be described in more detail below with reference to FIGS. 1-18.

The support assembly 100 includes a support base 110, bearing blocks 120, and a bracket 130, the two bearing blocks 120 are symmetrically fixed to the support base 110, the two bearing blocks 120 are used for installing and supporting the housing assembly 200, and the bracket 130 is fixed to the support base 110 for installing and supporting the water inlet valve assembly 500.

The case assembly 200 includes a middle case 210 and two side cases 220, the two side cases 220 being respectively screw-coupled with the middle case 210 by screws, specifically, through holes are provided on the middle case 210 and the two side cases 220 in the circumferential direction, through holes on the middle case 210 and the two side cases 220 are penetrated by a locking pull rod 240, and locking nuts 250 are screw-coupled at both ends of the locking pull rod 240 to lock the two side cases 220 at both ends of the middle case 210. The outer ends of the two side housings 220 of the housing assembly 200 are also respectively fixed with a bearing housing 230, specifically, the bearing housing 230 abuts against the outer port of the side housing 220 and is connected with the outer port of the side housing 220 by screw threads, and a sealing ring 231 is further arranged between the bearing housing 230 and the outer port of the side housing 220. The housing assembly 200 is conveniently disassembled and assembled by screw coupling in structural design, and when the housing assembly 200 is installed, the two bearing shells 230 are respectively installed on the two bearing seats 120 of the support assembly 100 through the swing bearings 260, so that the housing assembly 200 is rotatably installed on the support assembly 100. The two bearing shells 230 are also fixedly provided with a swinging bearing inner ring cover plate 270, the two bearing seats 120 are fixedly provided with a swinging bearing outer ring cover plate 280, the swinging bearing inner ring cover plate 270 is matched with the swinging bearing outer ring cover plate 280, and the swinging bearing inner ring cover plate 270 and the swinging bearing outer ring cover plate 280 can play a role in protecting the swinging bearing 260.

The stator assembly 300 is mounted in the interior cavity of the intermediate housing 210 of the housing assembly 200. The stator assembly 300 comprises a stator disc 310 and a drainage guide ring 320, the stator disc 310 and the drainage guide ring 320 are connected in series in a spaced arrangement, the stator disc 310 and the drainage guide ring 320 are matched with the inner cavity of the middle shell 210, the stator disc 310, the drainage guide ring 320 and the middle shell 210 are connected through a key slot 311 and a key 330 for positioning, and the stator disc 310 and the drainage guide ring 320 are connected in series to facilitate assembly and disassembly. The stator plate 310 is internally provided with a water inlet channel 312, the water inlet channel 312 is communicated with the water inlet 211 at the upper end of the middle shell 210, the center of the stator plate 310 is provided with a central through hole 313 penetrating through the water inlet channel 312, two end faces of the stator plate 310 are provided with stator power absorbing holes 314, and the stator power absorbing holes 314 are distributed in a circumferential array along the circumferential direction of the stator plate 310. The water inlet channel 312 of the stator plate 310 is communicated with the inner cavity of the water drainage guide ring 320 through the central through hole 313, the inner cavity of the water drainage guide ring 320 which is arranged between the two stator plates 310 at intervals forms a water drainage channel 321, and both sides of the bottom of the water drainage guide ring 320 are provided with water drainage holes 322 which are communicated with the water drainage channel 321.

The rotor assembly 400 comprises a rotating shaft 410, a rotor sheet 420 and a spacer ring 430, wherein the rotating shaft 410 is provided with a non-circular triangle cam section 411 for installing the rotor sheet 420 and the spacer ring 430, the rotor sheet 420 is provided with a non-circular triangle center hole 421, the spacer ring 430 is also provided with a non-circular triangle center hole 431, the rotor sheet 420 and the spacer ring 430 are arranged at intervals and connected in series on the non-circular triangle cam section 411 of the rotating shaft 410, and two ends after being connected in series are positioned on the rotating shaft 410 through locking rings, and the non-circular triangle cam section 411 of the rotating shaft 410 has larger torsional strength and rigidity, so that the rotor assembly 400 can meet the test requirement of a high torque engine. Rotor plate 420 is provided with rotor power absorbing holes 422, rotor power absorbing holes 422 are distributed in a circumferential array along the circumferential direction of rotor plate 420, after rotor assembly 400 is mounted in the inner cavity of middle shell 210, each rotor plate 420 is mounted in each drainage channel 321 in a one-to-one correspondence manner, and spacer ring 430 is positioned in central through hole 313 of stator plate 310. In operation, the rotor plate 420 agitates the water in the drain 321 through the rotor work absorbing holes 422 to perform centrifugal movement, so that the water absorbs the work of the engine. The rotor assembly 400 is convenient to assemble and disassemble through the design that the rotor sheets 420 and the spacer rings 430 are connected in series on the rotating shaft 410, and each rotor sheet 420 is independently positioned in each drainage channel 321, so that the rotor assembly has the advantages of small power absorption density, strong cavitation resistance and small high-speed centrifugal stress of a single rotor sheet 420.

The two ends of the non-circular triangle cam section 411 of the rotating shaft 410 are provided with cylindrical sections 412, and a high-speed contact sealing structure and a high-speed bearing lubrication sealing structure can be installed between the cylindrical sections 412 and the housing assembly 200, so that the requirements of lubrication and high-speed sealing of the high-speed bearing 1200 are met. The two ends of the rotating shaft 410 are also provided with splines 413, the rotating shaft 410 can be matched with and provided with a coupler 440 through the splines 413, the outer end of the splines 413 is provided with threaded holes, the coupler 440 is connected and locked at the end part of the rotating shaft 410 through threaded connection of a threaded piece and the threaded holes of the splines 413, and the rotating shafts 410 of two or more Kong Panshi hydraulic power meters can be connected in series through the coupler 440, so that a multi-stage serial hydraulic power meter is formed.

In this embodiment, the stator plate 310 of the stator assembly 300 is further provided with a first vent 315 penetrating from the edge to the water inlet channel 312, the middle housing 210 of the housing assembly 200 is provided with a first vent pipe 213, the first vent pipe 213 penetrates into the inner cavity of the middle housing 210 from the outside of the middle housing 210, and the first vent pipe 213 is communicated with the first vent 315 on the stator plate 310, and the outer end of the first vent pipe 213 is provided with a first micro vacuum balance valve 214. The inlet channel 312 is communicated with the external air flow through the first vent hole 315, the first vent pipe 213 and the first micro vacuum balance valve 214, so that the internal and external air pressure balance is realized, and thus, the air bubbles generated in the inlet channel 312 during the operation can be eliminated. The stator plate 310 is further provided with second ventilation holes 316 penetrating from the edges to the two axial ends, the side shell 220 of the shell assembly 200 is provided with second ventilation pipes 215, the second ventilation pipes 215 penetrate into the inner cavity of the middle shell 210 from the outside of the side shell 220, the inner ends of the second ventilation pipes 215 are communicated with the second ventilation holes 316, and the outer ends of the second ventilation pipes 215 are provided with second micro-vacuum balance valves 216. The drain 321 is communicated with the external air flow through the second vent hole 316, the second vent pipe 215 and the second micro vacuum balance valve 216, so that the internal and external air pressure balance is realized, and the air bubbles generated in the drain 321 during operation can be eliminated. Since bubbles in the water inlet channel 312 and the water outlet channel 321 can be eliminated, cavitation on the surfaces of the stator plate 310 and the rotor plate 420 can be effectively reduced or avoided, the cavitation resistance of the hole-disc type hydraulic dynamometer can be improved, and the service life of the hole-disc type hydraulic dynamometer can be prolonged. In this example, one cavitation detecting rod 221 is mounted to each of the two side cases 220 of the case assembly 200, and the inner ends of the two cavitation detecting rods 221 are located at both ends of the stator assembly 300, respectively, so that cavitation on the stator plate 310 can be monitored.

Referring to fig. 4 and 15, the high-speed contact seal structure provided on the rotation shaft 410 includes a contact seal assembly 900 and a water slinger 1000, wherein the contact seal assembly 900 includes a fixed seal seat 910, a seal sleeve 920, a spring seat 930, a retainer 914 and a rotary seal seat 940, the fixed seal seat 910 is fixed on the side housing 220 by a screw 911, a cooling water hole 912 is provided between an outer ring of the fixed seal seat 910 and the side housing 220, and a sealing ring 913 is provided between an outer ring of the fixed seal seat 910 and the side housing 220; the sealing shaft sleeve 920 is fixed on the inner ring of the fixed sealing seat 910 through a bolt 921, and a sealing ring 915 is arranged between the sealing shaft sleeve 920 and the fixed sealing seat 910; the outer ring of the spring seat 930 is matched with the inner ring of the fixed sealing seat 910, the retainer 914 is fixed on the inner ring of the fixed sealing seat 910 to axially position the spring seat 930 between the retainer 914 and the sealing shaft sleeve 920, the outer ring of the sealing shaft sleeve 920 is matched with the inner ring of the spring seat 930 and provided with a sealing ring 922 therebetween, the sealing shaft sleeve 920 is axially provided with a guide pin 923, the spring seat 930 is provided with a guide pin hole 931 matched with the guide pin 923, one side of the spring seat 930 facing the sealing shaft sleeve 920 is axially provided with a mounting hole, a pressure spring 932 is mounted in the mounting hole, two ends of the pressure spring 932 respectively lean against the spring seat 930 and the sealing shaft sleeve 920, the other side of the spring seat 930 is nested with a sealing static ring 933, the sealing static ring 900 is made of silicon carbide and has the characteristics of wear resistance and high temperature resistance, and good sealing effect is ensured; the rotary seal seat 940 and the water slinger 1000 are sequentially sleeved on the rotating shaft 410 from inside to outside, the rotary seal seat 940 and the water slinger 1000 are axially positioned through pin shaft 941 and hole matching, a sealing ring 942 is arranged between the rotary seal seat 940 and the water slinger 1000, a sealing shaft sleeve 920 is positioned on the outer ring of the water slinger 1000, the end face of the rotary seal seat 940 is abutted against the end face of a sealing static ring 933 on a spring seat 930, the fixed seal seat 910 is further provided with radial through holes 915 distributed along the circumferential direction of the rotary seal seat 940, the radial through holes 915 enable gaps between the outer ring of the rotary seal seat 940 and the inner ring of the fixed seal seat 910 to be communicated with the cooling water holes 912, a sealing spray coating is arranged on the surface of the rotary seal seat 940, the sealing spray coating is made of hard chromium, and the hardness of the sealing spray coating is larger than HRC55 and has the advantages of wear resistance and high temperature resistance.

In the high-speed contact seal structure, a seal cooling water inlet passage 222 and a seal water leakage passage 223 are further provided in the side case 220, and specifically, the seal cooling water inlet passage 222 penetrates from the upper portion of the side case 220 to a cooling water hole 912 of the outer ring of the fixed seal seat 910, and the seal water leakage passage 223 penetrates from the bottom of the side case 220 to the outer side of the fixed seal seat 910. The sealing cooling water inlet channel 222 can be connected into a cooling water circulation conveying system to introduce circulating cold water into the cooling water hole 912 to cool the high-speed contact sealing structure, and the working principle is that the cold water firstly enters the cooling water hole 912 from the sealing cooling water inlet channel 222, then enters the sealing static ring 933 and the outer ring of the rotary sealing seat 940 for radial cooling through the radial through hole 915, and the cooled water can axially enter the inner cavity of the rotor assembly 400 along the rotating shaft 410 and finally is discharged from the water outlet 212 of the shell assembly 200. In addition, when the sealing of the high-speed contact sealing structure fails, water in the inner cavity of the middle housing 210 enters the outer side of the fixed sealing seat 910, and the water slinger 1000 slings cooling water around and flows into the sealing water leakage channel 223. Therefore, through the design of the high-speed contact sealing structure, the sealing requirement during high-speed rotation can be met, oil-water channeling is prevented, heat generated by friction can be reduced through water cooling, and leakage can be found timely when sealing fails.

Referring to fig. 4 and 16, the high-speed bearing lubrication seal structure provided on the rotation shaft 410 includes an inner lubrication seal 1100, a high-speed bearing 1200, and an outer lubrication seal 1300, which are sequentially installed between the two cylindrical sections 412 and the two bearing shells 230 from inside to outside. The lubricating oil inner seal 1100 comprises an inner seal oil comb seal seat 1110 and an inner oil slinger 1120, wherein the inner oil slinger 1120 is sleeved on the cylindrical section 412 of the rotating shaft 410, the inner seal oil comb seal seat 1110 is fixed on the side shell 220 through bolts, and the inner ring of the inner seal oil comb seal seat is tightly matched with the outer ring of the inner oil slinger 1120; the inner ring of the high-speed bearing 1200 is fixed on the cylindrical section 412 of the rotating shaft 410, and the outer ring of the high-speed bearing 1200 is fixed on the bearing housing 230; the lubricating oil outer seal 1300 comprises an outer seal oil comb seal seat 1310 and an outer oil slinger 1320, the outer oil slinger 1320 is sleeved on the cylindrical section 412 of the rotating shaft 410, the outer seal oil comb seal seat 1310 is fixed on the bearing shell 230 through a positioning retainer ring, and an inner ring 1310 of the outer seal oil comb seal seat is tightly matched with an outer ring of the outer oil slinger 1320.

With respect to the high-speed bearing lubrication sealing structure, an oil injection pipe 232 is mounted on the bearing housing 230, and the oil injection pipe 232 passes through the outside of the bearing housing 230 between the lubricating oil outer seal 1300 and the high-speed bearing 1200. The side housing 220 is provided with an oil sump 224 located outside the lubricant inner seal 1100, the bearing housing 230 is provided with an oil return hole 233, and the oil sump 224 communicates with the inside of the lubricant outer seal 1300 through the oil return hole 233. The bearing housing 230 is also provided with a lubrication vacuum pump-back oil passage 225 in communication with the oil sump 224. The bearing housing 230 is further provided with a bearing temperature sensor 234, and the bearing temperature sensor 234 is inserted from the outside of the bearing housing 230 to the outer ring of the high-speed bearing 1200 for measuring the temperature of the high-speed bearing 1200. In the working process, the oil spraying pipe 232 and the lubricating vacuum suction oil return duct 225 are connected with a lubricating oil circulation system, lubricating oil can be injected into the high-speed bearing 1200 through the oil spraying pipe 232, the lubricating oil can be discharged through the lubricating vacuum suction oil return duct 225, and when the bearing temperature sensor 234 detects that the temperature of the high-speed bearing 1200 is too high, an alarm can be given to an operator to remind to check.

The Kong Panshi hydraulic dynamometer is also provided with a safety monitoring device 1400 for monitoring lubricating oil of the high-speed bearing 1200 and cooling water of the high-speed contact sealing structure aiming at the high-speed contact sealing structure and the high-speed bearing lubrication sealing structure on the rotor assembly 400. Specifically, the safety monitoring device 1400 includes a line interface module 1410, a pressure sensor 1420, a temperature sensor 1430, and an acquisition control box 1440. The pipeline interface module 1410 is provided with a lubrication oil supply interface 1411, a lubrication oil return interface 1412, a seal cooling water supply interface 1413 and a seal cooling water return interface 1414, the lubrication oil supply interface 1411 is communicated with the oil injection pipe 232 through a pipeline, the lubrication oil return interface 1412 is communicated with the lubrication vacuum suction oil duct 225 through a pipeline, the seal cooling water supply interface 1413 is communicated with the seal cooling water inlet channel 222 through a pipeline, and the seal cooling water return interface 1414 is communicated with the seal water leakage channel 223 through a pipeline. The lubrication return interface 1412 is fitted with a temperature sensor 1430. The lubrication oil supply port 1411, the lubrication oil return port 1412 and the seal cooling water supply port 1413 are respectively connected with a pressure sensor 1420 through a pressure measuring hose 1450, and the pressure sensor 1420 is integrally mounted on an integrated mounting block 1460. The temperature sensor 1430 and the pressure sensors 1420 are connected to the collection control box 1440, respectively, and the collected temperature and pressure signals are sent to the collection control box 1440, so that the temperature and pressure of the lubricating oil and the pressure of the sealing cooling water can be detected. Whether the temperature of the high-speed bearing 1200 is too high can be judged according to the temperature of the lubricating oil, whether the supply pressure of the lubricating oil and the sealing cooling water exceeds a set range can be monitored according to the pressure of the lubricating oil and the sealing cooling water, and warning and reminding can be carried out, so that faults caused by water shortage and oil shortage of the high-speed contact sealing structure and the high-speed bearing lubrication sealing structure are prevented.

As shown in fig. 1, the water inlet valve assembly 500 includes an electrohydraulic servo control butterfly valve 510 and a water inlet flexible connection pipe 520, the electrohydraulic servo control butterfly valve 510 is fixedly installed on the bracket 130 of the support assembly 100 through a first installation flange 530, the water inlet flexible pipe is connected between the electrohydraulic servo control butterfly valve 510 and the water inlet 211 of the middle shell 210, and O-shaped sealing rings are arranged at two ends of the water inlet flexible connection pipe 520 to ensure the tightness of the water inlet flexible connection pipe 520. The electro-hydraulic servo control butterfly valve 510 has the advantages of small inertia, large driving moment, high response speed and remote control.

The drain valve assembly 600 includes an electrohydraulic servo control sleeve adjusting valve 610, a drain flexible connection pipe 620 and a drain elbow 630, the electrohydraulic servo control sleeve adjusting valve 610 is fixedly installed on the support seat 110 of the support assembly 100 through a second installation flange 640, the drain flexible connection pipe 620 is connected to the water outlet 212 of the middle shell 210, the drain elbow 630 is connected between the flexible connection pipe and the electrohydraulic servo control sleeve adjusting valve 610, and in order to ensure the connection tightness, O-rings are arranged at two ends of the drain flexible connection pipe 620 and two ends of the drain elbow 630. The sleeve regulating valve controlled by the electrohydraulic servo system has the advantages of large output torque, high corresponding speed, linear valve plate opening and wide regulating range.

Referring to fig. 17-20, the calibration device 700 includes a force arm assembly 710, a calibration arm assembly 730, and a pretension arm assembly 720, the force arm assembly 710 being mounted on one side of the housing assembly 200, the calibration arm assembly 730 and the pretension arm assembly 720 being mounted on the other side of the housing assembly 200. Wherein, the force arm assembly 710 is provided with a pull pressure sensor 712 for measuring the torque applied to the housing assembly 200; the calibration arm assembly 730 comprises a force sensor 731 and an energy storage force adjusting piece, and the magnitude of static calibration pulling force or pressure applied to the shell assembly 200 by the calibration arm assembly 730 can be adjusted through the energy storage force adjusting piece; the pretension arm assembly 720 includes an elastic energy storage member and a length adjustment member, and the length adjustment member can adjust the length of the elastic energy storage member to enable the elastic energy storage member to apply pretension to the housing assembly 200.

Specifically, the force measuring arm assembly 710 includes a brake arm 711, a pull pressure sensor 712, an upper coupling screw 713, and a lower coupling screw 714, where the brake arm 711 is fixed on the outer wall of the intermediate housing 210, the upper end of the pull pressure sensor 712 is connected with an upper knuckle bearing 715 through the upper coupling screw 713, the upper knuckle bearing 715 is hinged with one end of the brake arm 711, the lower end of the pull pressure sensor 712 is connected with a lower knuckle bearing 716 through the lower coupling screw 714, and the lower knuckle bearing 716 is hinged on the support base 110.

The energy storage force adjuster of the calibration arm assembly 730 comprises a calibration arm 732, a force transfer rod 733, an upper adjusting nut 734, an upper belleville spring set 735, a lower adjusting nut 736 and a lower belleville spring set 737, wherein the calibration arm 732 is fixedly connected to the outer wall of the middle shell 210, the force transfer rod 733 vertically penetrates through the calibration arm 732 in a movable mode, the upper adjusting nut 734 is in threaded connection with the upper end of the force transfer rod 733, the upper belleville spring set 735 is sleeved on the force transfer rod 733 and is located between the upper adjusting nut 734 and the calibration arm 732, the lower adjusting nut 736 is in threaded connection with the lower end of the force transfer rod 733, the lower belleville spring set 737 is sleeved on the force transfer rod 733 and is located between the lower adjusting nut 736 and the calibration arm 732, the lower end of the force transfer rod 733 is fixedly connected with a force sensor 731, and the force sensor 731 is hinged to the supporting seat 110 through a joint bearing 738.

The length adjusting part of the pre-tightening arm assembly 720 comprises a mounting plate 721, a bearing plate 722, a guide seat 723 and a guide rod 724, the elastic energy storage part is a tension spring 725, the mounting plate 721 is fixed on the outer wall of the middle shell 210, the bearing plate 722 and the guide seat 723 are sequentially fixed on the mounting plate 721 from top to bottom, the guide rod 724 is slidably mounted on the guide seat 723, the upper end of the guide rod 724 is fixedly connected with a force adjusting bolt, the upper end of the force adjusting bolt passes through the bearing plate 722 and is in threaded connection with an adjusting nut 726, and two ends of the tension spring 725 are connected between the lower end of the guide rod 724 and the support seat 110 through hooks.

The calibration device 700 operates on the principle that: the pre-tightening arm assembly 720 can be used as an auxiliary device for improving the calibration precision of the calibration device 700, and when the calibration device is installed, the force measuring arm assembly 710 and the pre-tightening arm assembly 720 are installed first, and then the calibration arm assembly 730 is installed for calibration. After the force measuring arm assembly 710 and the pre-tightening arm assembly 720 are installed, the guide rod 724 can be adjusted to move on the guide seat 723 by screwing the adjusting nut 726, so that the tightness degree of the tension spring 725 is adjusted, the purpose of adjusting the pre-tightening tension of the tension spring 725 is achieved, the damping of the installation production of the force measuring arm assembly 710 on the shell assembly 200 can be adjusted, and the accuracy of subsequent calibration can be ensured. In the calibration process, by screwing the upper adjusting nut 734 or the lower adjusting nut 736 on the calibration arm assembly 730, the belleville spring can apply static calibration pressure or tension to the dowel bar 733, the magnitude of the static calibration force can be displayed through the force measuring sensor 731, the static calibration force is compared with the display value of the pull pressure sensor 712 on the force measuring arm assembly 710, and after a plurality of groups of data are measured, the pull pressure sensor 712 can be calibrated through a calibration program.

The calibration device 700 has a large torque range, can meet the test requirement of high-power high-speed rotating machinery, can realize stepless adjustment of static calibration force through the upper and lower adjusting nuts and the belleville springs of the calibration arm assembly 730, has a large adjusting range, is convenient to operate and control, has high fine adjustment sensitivity and accuracy, and is more beneficial to large torque calibration.

The rotation speed measuring device 800 comprises a speed measuring sensor 810, a speed measuring sensor seat 820 and a speed measuring gear 830, as shown in fig. 4, the speed measuring sensor 810 is fixedly installed on the swinging bearing inner ring cover plate 270 through the speed measuring sensor seat 820, the speed measuring gear 830 is coaxially sleeved on the coupler 440 of the rotating shaft 410, and the speed measuring sensor 810 is located at one side of the speed measuring gear 830 in the circumferential direction. In operation, the tachometer gear 830 rotates along with the rotation shaft 410, and the tachometer sensor 810 measures the rotation speed of the tachometer gear 830, i.e. the rotation speed of the rotation shaft 410.

Referring to fig. 19-21, according to the Kong Panshi hydraulic dynamometer described above, an embodiment of the present invention further provides a multistage serial hydraulic dynamometer, where the multistage serial hydraulic dynamometer is formed by connecting at least two hole-disc hydraulic dynamometers in series. The multistage serial hydraulic dynamometer can have a wider power testing range during working, so that the testing requirements of high-power high-speed rotating machinery such as a heavy-duty gas turbine, an aeroengine and the like can be met.

The multistage serial hydraulic power meter comprises a base 1500 and at least two Kong Panshi hydraulic power meters, wherein the at least two hole-disc hydraulic power meters are axially arranged at the upper end of the base 1500 at intervals, and two adjacent hole-disc hydraulic power meters are connected with a high-speed transmission shaft 1600 through a coupler 440 arranged at the end part of a rotating shaft 410. The upper end of the base 1500 is provided with an axial adjustment assembly 1510 and a radial adjustment assembly 1520, the axial adjustment assembly 1510 can adjust the length along the axial direction of the Kong Panshi hydraulic dynamometer to position the side of the supporting seat 110, and the radial adjustment assembly 1520 can adjust the length along the radial direction of the Kong Panshi hydraulic dynamometer to position the side of the supporting seat 110. The bottom edge of the support base 110 of the Kong Panshi hydraulic dynamometer is also locked on the base 1500 through a locking bolt 1530.

Specifically, the axial adjustment assembly 1510 includes a first fixing block 1511 and a first positioning bolt 1512, where the first fixing block 1511 is fixedly connected to the base 1500, a first threaded through hole axially parallel to the single-stage dynamometer is provided on the first fixing block 1511, and the first positioning bolt 1512 is screwed with the first threaded through hole. The radial adjustment assembly 1520 includes a second fixed block 1521 and a second positioning bolt 1522, the second fixed block 1521 is fixedly connected to the base 1500, a second threaded through hole perpendicular to the axial direction of the single-stage dynamometer is provided on the second fixed block 1521, and the second positioning bolt 1522 is screwed with the second threaded through hole.

The axial adjusting assembly 1510 and the radial adjusting assembly 1520 can be used for conveniently adjusting the positions of the orifice disc type hydraulic dynamometers, and meanwhile, the Kong Panshi hydraulic dynamometers can be ensured to have good coaxiality when being connected in series.

The upper end of the base 1500 is also fixed with a transmission shaft shield seat 1540, the upper end of the transmission shaft shield seat 1540 is fixedly connected with a transmission shaft shield 1550, the transmission shaft shield 1550 covers the high-speed transmission shaft 1600, and the high-speed transmission shaft 1600 can be protected through the transmission shaft shield 1550. The bottom edge of the base 1500 is fixed by the spherical combination pad 1560, the anchor bolt 1570 and the nut screw thread connection, so that the installation levelness of the base 1500 can be ensured.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (10)

1. The utility model provides a hole disk hydraulic power dynamometer which characterized in that, includes support assembly (100), casing assembly (200), stator assembly (300), rotor assembly (400), intake valve assembly (500), drainage valve assembly (600), calibration device (700) and survey rotational speed device (800), wherein:

the shell assembly (200) is arranged on the support assembly (100) through a swing bearing (260) and can swing around the horizontal axial direction;

the stator assembly (300) comprises stator plates (310) and drainage guide rings (320) which are serially fixed in an inner cavity of the shell assembly (200) and are distributed at intervals, wherein stator power absorption holes (314), a water inlet channel (312) and a central through hole (313) are formed in the stator plates (310), a drainage channel (321) is formed in the inner cavity of the drainage guide rings (320), and drainage holes (322) are formed in the bottoms of the drainage guide rings (320);

the rotor assembly (400) comprises a rotating shaft (410), rotor sheets (420) and a spacing ring (430) which are connected in series and fixed on the rotating shaft (410) and are distributed at intervals, the rotor sheets (420) are arranged in a drainage channel (321) in a one-to-one correspondence manner, rotor power suction holes (422) are formed in the rotor sheets (420), and a high-speed contact sealing structure and a high-speed bearing lubrication sealing structure are arranged between the rotating shaft (410) and the shell assembly (200);

the water inlet valve assembly (500) is connected with a water inlet (211) on the shell assembly (200), and the water outlet valve assembly (600) is connected with a water outlet (212) on the shell assembly (200);

the calibration device (700) is arranged on the support assembly (100) and connected with two sides of the shell assembly (200) to measure the torque of the shell assembly (200); the rotation speed measuring device (800) is used for detecting the rotation speed of the rotor assembly (400).

2. The Kong Panshi hydraulic dynamometer of claim 1, wherein the housing assembly (200) comprises a middle housing (210), side housings (220) and bearing housings (230), the two side housings (220) are respectively locked and fixed at two ends of the middle housing (210) through screw members, and the two bearing housings (230) are respectively locked and fixed at outer ends of the two side housings (220) through screw members.

3. The Kong Panshi hydraulic dynamometer of claim 2, wherein a first vent hole (315) penetrating from the edge to the water inlet channel (312) is formed in the stator plate (310) of the stator assembly (300), a first vent pipe (213) is formed in the middle shell (210), the first vent pipe (213) penetrates into the inner cavity of the middle shell (210) from the outside of the middle shell (210), the first vent pipe (213) is communicated with the first vent hole (315) on the stator plate (310), and a first micro-vacuum balance valve (214) is arranged at the outer end of the first vent pipe (213);

preferably, the stator plate (310) is further provided with second ventilation holes (316) which are communicated with the two axial ends from the edges of the stator plate, the side shell (220) is provided with second ventilation pipes (215), the second ventilation pipes (215) penetrate into the inner cavity of the middle shell (210) from the outside of the side shell (220), the inner ends of the second ventilation pipes (215) are communicated with the second ventilation holes (316), and the outer ends of the second ventilation pipes (215) are provided with second micro-vacuum balance valves (216).

4. A Kong Panshi hydraulic dynamometer according to claim 3, characterized in that one cavitation detecting rod (221) is mounted on each of the two side cases (220) of the case assembly (200), and the inner ends of the two cavitation detecting rods (221) are located at the two ends of the stator assembly (300), respectively.

5. The Kong Panshi hydraulic dynamometer of claim 1, wherein the shaft (410) of the rotor assembly (400) has a non-circular triangular cam section (411) on which the rotor plate (420) and the spacer ring (430) are mounted, and the rotor plate (420) and the spacer ring (430) are each provided with a non-circular triangular central hole that mates with the non-circular triangular cam section (411);

preferably, both ends of the non-circular triangle cam section (411) of the rotating shaft (410) are provided with cylindrical sections (412) for mounting a high-speed contact sealing structure and a high-speed bearing lubrication sealing structure;

preferably, both ends of a rotating shaft (410) of the rotor assembly (400) are provided with splines (413), and the rotating shaft (410) is provided with a coupling (440) through the splines (413) and a screw.

6. The Kong Panshi hydraulic dynamometer according to claim 2, wherein the high-speed contact sealing structure comprises a water throwing ring (1000) and a contact sealing assembly (900), a rotary sealing seat (940) and the water throwing ring (1000) of the contact sealing assembly (900) are sequentially sleeved on a rotating shaft (410) from inside to outside, the rotary sealing seat (940) and the water throwing ring (1000) are axially positioned through pin shaft connection, a sealing ring is arranged between the rotary sealing seat (940) and the water throwing ring, the contact sealing assembly (900) is fixed with a side shell (220) through an outer ring of a fixed sealing seat (910), a cooling water hole (912) is arranged between the fixed sealing seat (910) and the side shell (220), a sealing sleeve (920) and a spring seat (930) are arranged on an inner ring of the fixed sealing seat (910), the sealing sleeve (920) is matched with an outer ring of the water throwing ring (1000), a sealing static ring (933) is nested on the spring seat (930), the end face of the sealing static ring (933) is abutted against the outer ring of the rotary sealing seat (940), and a radial through hole (915) is further arranged on the fixed sealing seat (910), so that the rotary sealing seat (910) is communicated with the cooling water hole (912);

preferably, the side shell (220) is provided with a sealing cooling water inlet channel (222) and a sealing water leakage channel (223), the sealing cooling water inlet channel (222) is communicated with the cooling water hole (912), and the sealing water leakage channel (223) penetrates through the bottom of the side shell (220) to the outer side of the fixed sealing seat (910).

7. The Kong Panshi hydraulic dynamometer of claim 2, wherein the high-speed bearing lubrication seal structure comprises an inner lubrication oil seal (1100), a high-speed bearing (1200), an outer lubrication oil seal (1300) which are sequentially installed between the cylindrical section (412) of the rotating shaft (410) and the bearing housing (230) from inside to outside;

preferably, the bearing shell (230) is provided with an oil spraying pipe (232) penetrating from the outer side of the bearing shell (230) to a position between the lubricating oil outer seal (1300) and the high-speed bearing (1200), the side shell (220) is provided with an oil collecting groove (224) positioned at the outer side of the lubricating oil inner seal (1100), the bearing shell (230) is provided with an oil return hole (233), the oil collecting groove (224) is communicated with the inner side of the lubricating oil outer seal (1300) through the oil return hole (233), and the bearing shell (230) is also provided with a lubricating vacuum suction oil duct (225) communicated with the oil collecting groove (224).

8. The Kong Panshi hydraulic dynamometer of claim 2, wherein the intake valve assembly (500) includes an electrohydraulic servo-control butterfly valve (510) and an intake flexible nipple (520), the electrohydraulic servo-control butterfly valve (510) being fixedly mounted on the bracket (130) of the bracket assembly (100), the intake flexible nipple being connected between the electrohydraulic servo-control butterfly valve (510) and the water inlet (211) of the intermediate housing (210);

preferably, the drainage valve comprises an electrohydraulic servo control sleeve regulating valve (610), a drainage flexible connecting pipe (620) and a drainage elbow pipe (630), wherein the electrohydraulic servo control sleeve regulating valve (610) is fixedly arranged on a supporting seat (110) of the support assembly (100) through a mounting flange, the drainage flexible connecting pipe (620) is connected to a water outlet (212) of the middle shell (210), and the drainage elbow pipe (630) is connected between the flexible connecting pipe and the electrohydraulic servo control sleeve regulating valve (610).

9. The Kong Panshi hydraulic power meter of claim 1, wherein the calibration device (700) comprises a force arm assembly (710), a pre-load arm assembly (720) and a calibration arm assembly (730), the force arm assembly (710) being mounted on one side of the housing assembly (200), the pre-load arm assembly (720) and the calibration arm assembly (730) being mounted on the other side of the housing assembly (200), wherein:

the force measuring arm assembly (710) is provided with a pull pressure sensor (712) for measuring the torque applied to the housing assembly (200);

the pre-tightening arm assembly (720) is provided with an elastic energy storage piece and a length adjusting piece, and the length of the elastic energy storage piece can be adjusted through the length adjusting piece so that the elastic energy storage piece can apply pre-tightening force to the shell assembly (200);

the calibration arm assembly (730) is provided with a force transducer (731) and an energy storage force adjusting piece, and static calibration pulling force or pressure applied to the shell assembly (200) by the calibration arm assembly (730) can be adjusted through the energy storage force adjusting piece.

10. The Kong Panshi hydraulic dynamometer of claim 1, wherein the rotational speed measuring device (800) comprises a speed measuring sensor (810) and a speed measuring gear (830), the speed measuring gear (830) is coaxially sleeved on the circumference of the rotating shaft (410), and the speed measuring sensor (810) is located on one side of the speed measuring gear (830).