CN111911424A

CN111911424A - Rotating speed, torque and thrust testing device

Info

Publication number: CN111911424A
Application number: CN202010812542.4A
Authority: CN
Inventors: 叶豪杰; 曹琳琳; 蒋洪涛; 李诗徉; 孙帅
Original assignee: Shaoxing Zhixin Electromechanical Technology Co ltd
Current assignee: Hangzhou Zhixin Electromechanical Design Co Ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2020-11-10
Anticipated expiration: 2040-08-13
Also published as: CN111911424B

Abstract

The invention discloses a rotating speed torque thrust testing device, wherein a main shaft is connected to a central shaft at the front end of a torque testing sensor of the device, an impeller component to be tested is fixed at the front part of the main shaft, a bearing component is fixed on the main shaft between the impeller component to be tested and the testing component, the front part of the bearing component and the impeller component to be tested are both arranged in a water hole, a thrust shaft is coaxially arranged at the rear part of the rotating speed torque testing sensor, the end part of the thrust shaft is abutted against the thrust sensor, and a motor is connected between the rotating speed torque testing sensor and the thrust shaft through a synchronous belt component and is used for rotating the rotating speed torque testing sensor and. The invention can simultaneously detect the rotating speed torque and the thrust and output the rotating speed torque and the thrust of the impeller in real time, so that the data is more convenient and accurate, the occupied space of the equipment is small, the thrust sensor and the thrust shaft are matched for contact type test, the main shaft and the thrust shaft can move axially, the situation that the traditional thrust test is not accurate is broken, and the accuracy of the thrust test is improved.

Description

Rotating speed, torque and thrust testing device

Technical Field

The invention relates to the field of impeller testing, in particular to a rotating speed, torque and thrust testing device.

Background

At present, axial-flow impellers are generally applied to the fields of pump jet propellers, water pumps, submachine boats and rocket launching. The impeller rotates at high speed to generate huge thrust, and the impeller is widely applied to the fields of chemical engineering, shipbuilding and military. The requirements on the rotating speed, the torque and the thrust of various impellers are high in different fields, but the three parameters are difficult to measure simultaneously in the prior art, and the rotating speed, the torque and the thrust data cannot be output in real time in the same graph.

The existing impeller test needs to pass through two detection devices, namely a rotating speed torque test device and a thrust test device, the two detection processes are complicated, the tests need to be carried out respectively, and data inaccuracy is easily caused. Meanwhile, the existing thrust testing device fixes the thrust sensor on the central rotating shaft, the strength of the shaft can be damaged, the measuring range and precision are limited, the measured thrust often has large deviation, relatively accurate data can be obtained only by repeated tests and data calibration processes, and the detection precision is low.

Disclosure of Invention

The invention aims to provide a device for rapidly detecting whether the design performance of an impeller reaches the standard or not, aiming at the defects of the prior art. The system greatly improves the detection efficiency in the field of impeller design, so that the parameters of the theoretically designed impeller can be effectively fed back to a designer in real time, the iteration times are reduced, the design level and the design efficiency in the fields of shipbuilding, chemical engineering and military are greatly improved, and the test cost is reduced.

In order to achieve the purpose, the invention adopts the following technical scheme:

a rotating speed torque thrust test device comprises a base, wherein a water tunnel, a main shaft, a bearing assembly, a motor, a rotating speed torque test sensor and a thrust sensor are arranged on the base, the water hole is internally provided with water, the central shaft at the front end of the torque test sensor is connected with a main shaft, the front part of the main shaft is fixed with an impeller component to be tested, a bearing assembly is fixed on the main shaft between the impeller assembly to be tested and the testing assembly, the front part of the bearing assembly and the impeller assembly to be tested are both arranged in the water tunnel, a thrust shaft is coaxially arranged at the rear part of the rotating speed and torque testing sensor, the tail end of the thrust shaft is in a cone shape, the top of the cone shape is in a spherical shape, the end part of the thrust shaft is abutted against the thrust sensor, the motor is connected between the rotating speed and torque test sensor and the thrust shaft through a synchronous belt component, the device is used for driving the thrust shaft and the rotating speed torque test sensor and driving the main shaft and the impeller assembly to be tested to rotate.

Furthermore, the device comprises a machine shell, wherein the machine shell is connected with the tail end of the water tunnel, and the rear part of the bearing assembly, the rotating speed and torque test sensor and the thrust sensor are all arranged in the machine shell.

Furthermore, the testing device further comprises a thrust sensor base fixed on the rear side wall of the casing, the thrust sensor is fixed in the center of the thrust sensor base, one end of the thrust sensor is fixed on the base, one end of the thrust sensor is connected with a connecting piece with a conical groove through threads, the connecting piece is in line contact with the thrust shaft, and grease is filled in the contact position of the thrust shaft and the connecting piece. The grease is liquefied and drag-reduced by the heat generated by friction during the rotation of the thrust shaft.

Furthermore, double-diaphragm couplings are arranged at two ends of the rotating speed torque sensor and are respectively connected with a central shaft and a thrust shaft of the bearing assembly.

Further, the impeller subassembly that awaits measuring includes stator and impeller, the front portion of main shaft is all located to stator, impeller.

Furthermore, the water tunnel comprises a pump body with a water inlet, the front part of the pump body is provided with a transparent tail pipe, and the rear part of the pump body is provided with the water inlet which is arranged towards the side edge.

Further, the bearing assembly comprises a bearing seat, a cylindrical roller bearing, a rectifying grid, a water-lubricated sliding bearing seat and a water-lubricated sliding bearing, the cylindrical roller bearing is arranged in the bearing seat and positioned at the rear part of the main shaft, the rectifying grid is arranged on the main shaft and positioned behind the component to be tested, and the water-lubricated sliding bearing is arranged between the component to be tested and the main shaft and is fixed through the water-lubricated sliding bearing seat.

Furthermore, the synchronous belt component comprises a motor synchronous belt pulley and a synchronous belt pulley, the synchronous belt pulley is fixed on the thrust shaft, the motor synchronous belt pulley is connected with the motor, and the motor synchronous belt pulley and the synchronous belt pulley are linked through a synchronous belt.

Furthermore, the rear end of the bearing seat is sealed through a framework sealing ring, and the front end of the cylindrical roller bearing is sealed with the main shaft through a filler.

Furthermore, the guide cover is arranged at the front end of the guide vane and is fixed with the front side surface of the water tunnel through a locking nut.

By adopting the technical scheme of the invention, the invention has the beneficial effects that: the device can simultaneously detect the rotating speed torque and the thrust, reduces the detection times, and not only leads the data to be more convenient and accurate, but also has small occupied space of the equipment. The device has the advantages that the thrust sensor and the thrust sensor are matched with each other to perform contact type testing, the situation that the traditional thrust testing is not accurate is broken, and the accuracy of the thrust testing is greatly improved.

Drawings

FIG. 1 is a top view of a rotational speed, torque and thrust testing device provided by the present invention;

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a side view of the rotational speed, torque and thrust testing device of the present invention;

FIG. 5 is a graph of thrust torque of the impeller flow to be measured according to the present invention;

FIG. 6 is a thrust shaft structure of the present invention;

fig. 7 is a view showing the construction of the connector of the present invention.

1. The motor, 2, a motor synchronous pulley, 3, a base, 4, a thrust sensor base, 5, a thrust sensor, 6, a thrust shaft, 7, a sliding bearing seat, 8, a synchronous pulley, 9, a double-diaphragm coupling, 10, a rotating speed torque sensor, 11, a bearing seat, 12, a pump body, 13, a framework sealing ring, 14, a cylindrical roller bearing, 15, a filler, 16, a main shaft, 17, a rectifying grid, 18, a sliding bearing seat, 19, a water lubrication sliding bearing, 20, a guide vane, 21, a tail pipe, 22, an impeller, 23, a flow guide cover, 24, a locking nut, 25, a motor adjusting seat, 26, a synchronous belt, 27 and a connecting piece.

Detailed Description

Specific embodiments of the present invention will be further described with reference to the accompanying drawings.

As shown in the figure, the rotating speed torque thrust testing device comprises a base 3, wherein a water hole, a main shaft 16, a bearing assembly, a motor 1, a rotating speed torque testing sensor and a thrust sensor are arranged on the base 3, water is arranged in the water hole, the front end central shaft of the torque testing sensor is connected with the main shaft 16, an impeller 22 assembly to be tested is fixed at the front part of the main shaft 16, the bearing assembly is fixed on the main shaft 16 between the impeller 22 assembly to be tested and the testing assembly, the front part of the bearing assembly and the impeller 22 assembly to be tested are both arranged in the water hole, a thrust shaft 6 is coaxially arranged at the rear part of the rotating speed torque testing sensor, the tail end of the thrust shaft 6 is in a cone shape, the top of the cone shape is spherical, the end part of the thrust shaft 6 is abutted against the thrust sensor, the motor 1 is connected, used for driving the thrust shaft and the rotating speed torque test sensor and driving the main shaft 16 and the impeller 22 assembly to be tested to rotate.

The device comprises a machine shell, wherein the machine shell is connected with the tail end of the water tunnel, and the rear part of the bearing assembly, the rotating speed and torque test sensor and the thrust sensor are all arranged in the machine shell.

The testing device further comprises a thrust sensor 5 base 4 fixed on the rear side wall of the shell, and the thrust sensor 5 is fixed in the center of the thrust sensor 5 base 4. One end of the thrust sensor 5 is fixed on the base, the other end of the thrust sensor is connected with a connecting piece 27 with a conical groove through threads, the connecting piece 27 is in line contact with the thrust shaft 6, and grease is filled in the contact position of the thrust shaft 6 and the connecting piece 27. The grease is liquefied and drag-reduced by the heat generated by friction during the rotation of the thrust shaft.

And two ends of the rotating speed torque sensor 10 are respectively provided with a double-diaphragm coupling 9, and the double-diaphragm couplings 9 are respectively connected with a central shaft of the bearing assembly and the thrust shaft 6.

The impeller 22 assembly to be tested comprises a guide vane 20 and an impeller 22, and the guide vane 20 and the impeller 22 are arranged on the front portion of the main shaft 16. The air guide sleeve 23 is arranged at the front end of the guide vane 20 and is fixed with the front side surface of the water tunnel through a locking nut 24.

The water tunnel comprises a pump body 12 with a water inlet, the front part of the pump body 12 is provided with a transparent tail pipe 21, and the rear part of the pump body 12 is provided with the water inlet which is opened towards the side edge.

The bearing assembly comprises a bearing seat 11, a cylindrical roller bearing 14, a rectifying grid 17, a water-lubricated sliding bearing seat 18 and a water-lubricated sliding bearing 19, wherein the cylindrical roller bearing 14 is arranged in the bearing seat 11 and positioned at the rear part of a main shaft 16, the rectifying grid 17 is arranged on the main shaft 16 and positioned behind an assembly to be tested, and the water-lubricated sliding bearing 19 is arranged between the assembly to be tested and the main shaft 16 and is fixed through the water-lubricated sliding bearing seat 18. The rear end of the bearing seat 11 is sealed by a framework sealing ring 13, and the front end of the cylindrical roller bearing 14 is sealed with the main shaft 16 by a packing 15.

The synchronous belt component comprises a motor synchronous belt pulley 2 and a synchronous belt pulley 8, the synchronous belt pulley 8 is fixed on the thrust shaft 6, the motor synchronous belt pulley 2 is connected with the motor 1, and the motor synchronous belt pulley 2 and the synchronous belt pulley 8 are linked through a synchronous belt. Sliding bearing seats 187 are provided on both sides of the timing pulley 8. The motor 1 is provided with a motor adjusting seat 25 for adjusting the position of the motor 1.

The test data using the apparatus of the present invention was compared to the test data of the prior art as follows:

current strain gage test benches are unable to test such large impellers, so there is no comparative data. Only one set of impeller thrust torque data measured by the experimental table is compared with the design value.

TABLE 1 impeller design values to be tested

Flow rate m3/h	Rotating speed r/m	Thrust N	Moment N m	Lift M	Power Kw	Efficiency%	Shaft power Kw
								400	1200	399.46	14.00	1.26	1.36	77.54	1.76

TABLE 2 impeller rotation speed and torque thrust value to be measured under different flow conditions

Degree of opening of valve	Flow rate m3/h	Rotating speed r/m	Thrust N	Moment N m	Lift M	Power Kw	Efficiency%	Shaft power Kw
									15	76.35	1203	854.88	27.54	2.95	0.61	17.64	3.46
30	152.63	1205	685.52	20.42	2.11	0.88	34.12	2.57
									45	248.57	1202	590.82	18.65	1.74	1.18	50.13	2.34
60	311.86	1206	548.83	16.86	1.81	1.53	72.14	2.12
									75	401.18	1204	409.53	14.18	1.28	1.40	78.42	1.78
90	488.92	1201	182.48	7.35	0.48	0.64	68.86	0.92

According to the experimental result, the data of the impeller to be tested in the experiment accord with the design value, and the design target is achieved.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A rotating speed torque thrust test device comprises a base, and is characterized in that a water hole, a main shaft, a bearing assembly, a motor, a rotating speed torque test sensor and a thrust sensor are arranged on the base, the water hole is internally provided with water, the central shaft at the front end of the torque test sensor is connected with a main shaft, the front part of the main shaft is fixed with an impeller component to be tested, a bearing assembly is fixed on the main shaft between the impeller assembly to be tested and the testing assembly, the front part of the bearing assembly and the impeller assembly to be tested are both arranged in the water tunnel, a thrust shaft is coaxially arranged at the rear part of the rotating speed and torque testing sensor, the tail end of the thrust shaft is in a cone shape, the top of the cone shape is in a spherical shape, the end part of the thrust shaft is abutted against the thrust sensor, the motor is connected between the rotating speed and torque test sensor and the thrust shaft through a synchronous belt component, the device is used for driving the thrust shaft and the rotating speed torque test sensor and driving the main shaft and the impeller assembly to be tested to rotate.

2. A rotational speed torque thrust test apparatus as claimed in claim 1, wherein the apparatus includes a housing, the housing is connected to the end of the water tunnel, and the rear portion of the bearing assembly, the rotational speed torque test sensor and the thrust sensor are disposed in the housing.

3. The rotational speed, torque and thrust testing device of claim 2, further comprising a thrust sensor base fixed on the rear side wall of the casing, wherein the thrust sensor is fixed at the center of the thrust sensor base, one end of the thrust sensor is fixed on the base, the other end of the thrust sensor is in threaded connection with a connecting piece with a conical groove, the connecting piece is in line contact with the thrust shaft, the contact position of the thrust shaft and the connecting piece is filled with grease, and the grease is liquefied and reduced in resistance due to friction heat generated in the rotation process of the thrust shaft.

4. A testing device for rotational speed, torque and thrust force as claimed in claim 1, wherein the rotational speed, torque sensor is provided with double-diaphragm couplings at both ends, and the double-diaphragm couplings are respectively connected with the central shaft and the thrust shaft of the bearing assembly.

5. The rotational speed, torque and thrust testing device of claim 1, wherein the impeller assembly to be tested comprises a guide vane and an impeller, and the guide vane and the impeller are both arranged at the front part of the main shaft.

6. The rotational speed, torque and thrust testing device of claim 1, wherein the water cavity comprises a pump body with a water inlet, the front part of the pump body is provided with a transparent tail pipe, and the rear part of the pump body is provided with a water inlet which is opened towards the side edge.

7. A testing apparatus for rotational speed, torque and thrust as claimed in claim 1, wherein the bearing assembly comprises a bearing housing, a cylindrical roller bearing disposed in the bearing housing and at the rear of the main shaft, a rectifying grid disposed on the main shaft and behind the component to be tested, a sliding bearing housing, and a water-lubricated sliding bearing disposed between the component to be tested and the main shaft and fixed by the sliding bearing housing.

8. The rotational speed, torque and thrust testing device of claim 1, wherein the synchronous belt assembly comprises a motor synchronous pulley and a synchronous pulley, the synchronous pulley is fixed on the thrust shaft, the motor synchronous pulley is connected with a motor, and the motor synchronous pulley and the synchronous pulley are linked through a synchronous belt.

9. The rotational speed, torque and thrust testing device of claim 7, wherein the rear end of the bearing seat is sealed by a framework sealing ring, and the front end of the cylindrical roller bearing is sealed with the main shaft by a filler.

10. The rotational speed, torque and thrust testing device as claimed in claim 5, wherein the flow guide cover is arranged at the front end of the guide vane and fixed with the front side surface of the water tunnel through a locking nut.