CN114152375B - Hydraulic dynamometer with axial force measurement function - Google Patents
Hydraulic dynamometer with axial force measurement function Download PDFInfo
- Publication number
- CN114152375B CN114152375B CN202111446738.7A CN202111446738A CN114152375B CN 114152375 B CN114152375 B CN 114152375B CN 202111446738 A CN202111446738 A CN 202111446738A CN 114152375 B CN114152375 B CN 114152375B
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- China
- Prior art keywords
- axial force
- shell
- measuring device
- bearing
- main shaft
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- 238000005259 measurement Methods 0.000 title claims abstract description 17
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/26—Devices for measuring efficiency, i.e. the ratio of power output to power input
Abstract
The invention particularly relates to a hydraulic dynamometer with an axial force measurement function, which is used for directly measuring the axial force while measuring the power of tested equipment. The axial force measuring device is arranged on the outer arc surface of the top of the circular ring of the support frame, and is connected between the main shaft and the thrust device; the torque measuring device is connected with the shell through a force arm.
Description
Technical Field
The invention belongs to the power machinery inspection test, and particularly relates to a hydraulic dynamometer with an axial force measurement function.
Background
The hydraulic dynamometer is an indispensable testing device in the power machine characteristic test of a generator, a motor, an internal combustion engine, a gas turbine, a pump and the like and the efficiency test of a transmission machine, is used as the earliest dynamometer structural form, and has the characteristics of simple structure, convenient operation, good regulation performance, stable work, low price and the like, thus being widely applied.
With the increasing requirement of test coverage, the nondestructive measurement requirements of parameters such as output power, axial force and the like under the high-speed rotation working state of the power machine are urgent, the requirements of high-precision fields such as aviation and aerospace engines on measurement precision are also stricter, and in the prior art, the hydraulic dynamometer does not have an axial force measurement function, so that the application range is limited to a certain extent. Therefore, the hydraulic dynamometer with the axial force measuring function is designed to be an urgent problem to be solved for the technical field of power machine inspection and test.
Disclosure of Invention
The invention aims to solve the technical problems that the existing hydraulic dynamometer does not have an axial force measurement function and has a certain limitation in application range, and provides the hydraulic dynamometer with the axial force measurement function, so that the axial force is directly measured while the power of tested equipment is measured.
The technical scheme of the invention is as follows:
the utility model provides a hydraulic dynamometer with axial force measurement function which characterized in that:
the device comprises a support frame, a sliding bearing, a support bearing, a shell, a shafting, an axial force measuring device, a thrust device, a base, a torque measuring device and a force arm;
the supporting frame, the thrust device and the torque measuring device are all fixed on the base;
the shafting comprises a main shaft, a rotor and a shaft sleeve, wherein the rotor is fixed on the main shaft through the shaft sleeve; the main shaft is arranged in the shell through the support bearing, and one end of the main shaft extends out of the shell and is used for connecting a coupler of the tested device; the method comprises the steps of carrying out a first treatment on the surface of the The two support bearings are unidirectional angular contact bearings which are arranged face to face or back to back, or a bidirectional angular contact bearing and a deep groove ball bearing;
the shell is arranged on the supporting frames at the two sides through sliding bearings;
the shell is provided with a connecting end along the axial direction, and an axial force measuring device is connected between the connecting end and the thrust device;
the force arm is radially arranged on the side face of the shell, and the torque measuring device is connected with the shell through the force arm.
Further, one end of the main shaft is of a spline and thread composite structure and is used for connecting a coupler of a tested device.
Further, the axial force measuring device adopts an S-shaped force sensor.
Further, the top of the support frame is of a hollow circular ring structure and is made of plate-shaped steel, and a sliding bearing is arranged in the hollow circular ring structure; the support frame is fixed with the sliding bearing through a clamp. Compared with the prior art, the invention has the beneficial effects that:
(1) The invention realizes simultaneous measurement of the torque and the axial force of the tested equipment by skillfully setting the configuration of the two sets of bearings at home and abroad, and solves the problem that the torque can only be measured at home and abroad and the axial force can not be measured at present.
(2) According to the invention, the bidirectional measurement of the axial tension and the pressure of the tested equipment is realized by arranging the S-shaped bidirectional force sensor behind the shell.
(3) The invention has compact integral structure, is suitable for various working environments, has relatively long service life, can still operate well under complex working conditions, has the characteristic of wide application range, and has good market application prospect.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a side view of the present invention;
fig. 3 is a structural diagram of a support frame according to the present invention.
Wherein: 1. a support frame; 2. a sliding bearing; 3. a support bearing; 4. a housing; 5. a shafting; 6. an axial force measuring device; 7. a thrust device; 8. a base; 9. a torque measuring device; 10. arm of force.
Detailed Description
In order that the manner in which the invention is attained and can be understood more readily, a further description of the invention will be had by reference to the accompanying drawings and descriptive matter in which:
as shown in fig. 1 to 3, the hydraulic dynamometer with an axial force measuring function comprises a supporting frame 1, a sliding bearing 2, a supporting bearing 3, a shell 4, a shafting 5, an axial force measuring device 6, a thrust device 7, a base 8 and a torque measuring device 9.
The shafting 5 is arranged in the shell 4 under the support of the two support bearings 3, the shell 4 is arranged on the support frames 1 at two sides of the shell 4 through the sliding bearings 2, and the support frames 1 are connected with the base 8 through bolts to realize the relative fixation of the dynamometer and the ground;
the shafting 5 comprises a main shaft, a rotor and a shaft sleeve; one end of the main shaft adopts a spline and thread structure and is connected with a coupler of the tested device, the coupler is provided with a spline and an outer sleeve nut, after the matched use, the matched spline can play a role in circumferential fixation, and the matched thread and the nut can play a role in axial fixation, so that the torque and the axial force of the tested device can be transmitted to the dynamometer without loss.
The support frame 1 adopts a solid plate-shaped structure, the top of the support frame is a hollow circular ring, the inner diameter of the hollow circular ring is matched with the diameter of the shafting 5, and the height of the support frame 1 is determined according to the diameter of the shell 4 and the overall required height of the test system; the semi-circular arc-shaped diameter of the sliding bearing 2 is determined by the diameter of the sliding bearing 2, a clamp is arranged above the sliding bearing 2 and used for pressing the sliding bearing 2, the sliding bearing 2 is positioned on two sides of the shell 4, and the clamp is connected with the supporting frame 1 by bolts; the sliding bearing 2 has the functions of circumferential rotation and axial sliding, and has two functions, and can adopt national standards or nonstandard designs.
The two axial ends inside the shell 4 are respectively provided with a support bearing 3, the support bearings 3 are angular contact bearings, two support bearings 3 can be arranged face to face or back to back by adopting two unidirectional angular contact bearings, and a bidirectional angular contact bearing and a ball bearing can also be adopted, so that the axial force on the shafting 5 can be transmitted to the shell 4 by effectively supporting the shafting 5, supporting the shafting to stably and reliably operate.
One end of the axial force measuring device 6 is connected with the shell 4, the other end is connected with the thrust device 7, the axial force is measured, the connection modes are all threaded connection, and the relative positions are limited by using nuts.
The axial force measuring device 6 adopts an S-shaped force sensor and can measure axial pressure or tensile force; the thrust device 7 is reliably fixed on the base by bolts and bears the axial force transmitted by the axial force measuring device 6.
The torque measuring device 9 is fixed on the base 8 to realize the measurement of torque; the torque measuring device 9 is connected to the housing 4 via a force arm 10
The working principle of the invention is as follows:
taking a certain tested device as an example, connecting the tested device with the hydraulic dynamometer through a coupler before the test starts, and ensuring that the coupler, the tested device and the hydraulic dynamometer are completely locked in the axial direction and the circumferential direction; in the test process, the tested equipment drives the hydraulic dynamometer shafting 5 to rotate, the shafting 5 drives the working wheel disc to rotate in a cavity formed by the shell 4, water enters the working cavity from the root part of the wheel disc on the shafting 5, and is discharged from a high-pressure area at the edge of the wheel disc under the action of eccentricity, the shafting 5 and the water in the shell 4 form friction, so that the moment of the tested equipment is transmitted to the dynamometer shell 4, and the sliding bearing 2 has freedom degree in the circumferential direction, so that the dynamometer shell 4 has a tendency of rotating, and the moment value is measured by the torque measuring device 9; meanwhile, the axial force generated by the tested equipment is transmitted to the shaft system 5 of the dynamometer through the shaft coupling, the shaft system generates an axial sliding trend, the support bearing 3 transmits the axial force on the shaft system 5 to the outer ring of the bearing due to the angular contact bearing, and then the axial force is transmitted to the shell 4, at the moment, the shell 4 also has a trend of axial sliding under the action of the axial force, and the sliding bearing 2 also has an axial freedom degree, so that the axial force on the shell 4 can be transmitted to the axial force measuring device 6 without loss, and the thrust device 7 limits the axial movement of the device (the dynamometer disclosed by the invention only has a trend of relative movement), so that the axial force is finally measured.
Claims (4)
1. A hydraulic dynamometer with axial force measurement function, characterized in that:
the device comprises a supporting frame (1), a sliding bearing (2), a supporting bearing (3), a shell (4), a shaft system (5), an axial force measuring device (6), a thrust device (7), a base (8), a torque measuring device (9) and a force arm (10);
the support frame (1), the thrust device (7) and the torque measuring device (9) are all fixed on the base (8);
the shafting (5) comprises a main shaft, a rotor and a shaft sleeve, and the rotor is fixed on the main shaft through the shaft sleeve; the main shaft is arranged in the shell (4) through the support bearing (3), and one end of the main shaft extends out of the shell (4) and is used for connecting a coupler of a tested device; the two support bearings (3) are unidirectional angular contact bearings which are arranged face to face or back to back, or a bidirectional angular contact bearing and a deep groove ball bearing;
the shell (4) is arranged on the supporting frames (1) at the two sides through the sliding bearings (2);
the shell (4) is provided with a connecting end along the axial direction, and an axial force measuring device (6) is connected between the connecting end and the thrust device (7);
the force arm (10) is arranged on the side surface of the shell (4) along the radial direction, and the torque measuring device (9) is connected with the shell (4) through the force arm (10).
2. A hydraulic dynamometer with axial force measurement as defined in claim 1, wherein: one end of the main shaft is of a spline and thread composite structure and is used for connecting a coupler of a tested device.
3. A hydraulic dynamometer with axial force measurement according to claim 1 or 2, characterized in that: the axial force measuring device (6) adopts an S-shaped force sensor.
4. A hydraulic dynamometer with axial force measurement of claim 3, wherein: the top of the support frame (1) is of a hollow circular ring structure and is made of plate-shaped steel, and a sliding bearing (2) is arranged in the hollow circular ring structure; the support frame (1) and the sliding bearing (2) are fixed through a clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111446738.7A CN114152375B (en) | 2021-11-30 | 2021-11-30 | Hydraulic dynamometer with axial force measurement function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111446738.7A CN114152375B (en) | 2021-11-30 | 2021-11-30 | Hydraulic dynamometer with axial force measurement function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114152375A CN114152375A (en) | 2022-03-08 |
| CN114152375B true CN114152375B (en) | 2024-02-27 |
Family
ID=80455496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111446738.7A Active CN114152375B (en) | 2021-11-30 | 2021-11-30 | Hydraulic dynamometer with axial force measurement function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114152375B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4419901A (en) * | 1981-03-24 | 1983-12-13 | Thyssen Industrie Ag | Device for measuring the axial force in a shaft journalled by roller bearings |
| CN102322995A (en) * | 2011-08-12 | 2012-01-18 | 洛阳轴研科技股份有限公司 | The pairing micro rolling ball bearing applies friction torque test method under the axial load face-to-face |
| CN104165726A (en) * | 2014-08-18 | 2014-11-26 | 南通常测机电股份有限公司 | Calibration device for dynamometer |
| US9752961B2 (en) * | 2014-06-19 | 2017-09-05 | Avl Test Systems, Inc. | Dual-purpose dynamometer |
| CN108871646A (en) * | 2018-06-28 | 2018-11-23 | 西安航天动力研究所 | A kind of bracket with Bidirectional freedom degree |
| CN110849535A (en) * | 2019-11-21 | 2020-02-28 | 中国船舶重工集团公司第七0四研究所 | Thrust and torque composite calibration isolation structure based on flexible support |
| CN212585886U (en) * | 2020-07-27 | 2021-02-23 | 北京博科测试系统股份有限公司 | Chassis dynamometer for vehicle test |
-
2021
- 2021-11-30 CN CN202111446738.7A patent/CN114152375B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4419901A (en) * | 1981-03-24 | 1983-12-13 | Thyssen Industrie Ag | Device for measuring the axial force in a shaft journalled by roller bearings |
| CN102322995A (en) * | 2011-08-12 | 2012-01-18 | 洛阳轴研科技股份有限公司 | The pairing micro rolling ball bearing applies friction torque test method under the axial load face-to-face |
| US9752961B2 (en) * | 2014-06-19 | 2017-09-05 | Avl Test Systems, Inc. | Dual-purpose dynamometer |
| CN104165726A (en) * | 2014-08-18 | 2014-11-26 | 南通常测机电股份有限公司 | Calibration device for dynamometer |
| CN108871646A (en) * | 2018-06-28 | 2018-11-23 | 西安航天动力研究所 | A kind of bracket with Bidirectional freedom degree |
| CN110849535A (en) * | 2019-11-21 | 2020-02-28 | 中国船舶重工集团公司第七0四研究所 | Thrust and torque composite calibration isolation structure based on flexible support |
| CN212585886U (en) * | 2020-07-27 | 2021-02-23 | 北京博科测试系统股份有限公司 | Chassis dynamometer for vehicle test |
Non-Patent Citations (2)
| Title |
|---|
| Low-cost, constrained-motion dynamometer for milling force measurement;Michael Gomez等;《Manufacturing Letters》;第25卷;第34-39页 * |
| 基于串联刚度模型的涡轮泵轴向力计算方法;李爱民 等;《火箭推进》;第46卷(第6期);第30-34页 * |
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| Publication number | Publication date |
|---|---|
| CN114152375A (en) | 2022-03-08 |
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