CN216955152U

CN216955152U - Series engine test bed

Info

Publication number: CN216955152U
Application number: CN202123442616.9U
Authority: CN
Inventors: 李志刚; 马焉; 李鑫; 蔡源吉; 张兆辉
Original assignee: Siemens Ltd China
Current assignee: Yinmengda Transmission Technology Shanghai Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-12
Anticipated expiration: 2031-12-31

Abstract

The tandem engine test bed comprises a fixed platform, a first dynamometer, a second dynamometer and a bearing seat, wherein the first dynamometer and the second dynamometer are fixed on the fixed platform; the bearing seat comprises a supporting shaft, a first output end of the supporting shaft is connected with a second output shaft of the second dynamometer through a second connecting mechanism, and a second output end of the supporting shaft is connected with an output shaft of the engine to be tested through a third connecting mechanism. Based on the tandem engine test bed of the embodiment, two dynamometers with tandem structures are used for testing engines with different power ranges, any one dynamometer can be used, and the two dynamometers can also be used for testing at the same time, so that the test range of one test bed is larger.

Description

Series engine test bed

Technical Field

The utility model relates to the technical field of engine testing, in particular to a series engine test bed.

Background

The principle of the engine test bed is that a dynamometer is utilized to simulate various loads in actual engine operation conditions, and the measurement and control of power, torque and rotating speed are carried out on the engine, so that the purpose of evaluating performance indexes of the engine under various test conditions is achieved. At present, when an engine is tested, if different tested engine power grades have large differences, in order to ensure the testing precision, several different engine test beds are required to be designed and manufactured aiming at the engines with different power grades, namely, a small-power engine is required to be matched during the test of the small-power engine, and a large-power engine test bed is correspondingly designed for the large-power engine, so that the problems of long design and manufacturing period, high manufacturing cost of the test bed and the like exist.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a tandem engine test stand to solve the above problems.

According to the purpose of the utility model, the tandem engine test stand is characterized by comprising: a fixed platform; the first dynamometer and the second dynamometer are fixedly installed on the fixed platform, and an output shaft of the first dynamometer is connected with a first output shaft of the second dynamometer through a first connecting mechanism; the bearing seat comprises a supporting shaft, the first output end of the supporting shaft is connected with the second output shaft of the second dynamometer through a second connecting mechanism, and the second output end of the supporting shaft is connected with the output shaft of the engine to be tested through a third connecting mechanism.

Based on the tandem engine test bed of the embodiment, two dynamometers in a tandem structure are used for testing engines in different power ranges, and any one dynamometer can be used, and two dynamometers can also be used for testing simultaneously. The test range of one test bed is wider.

Further, the first connecting mechanism is a diaphragm coupler, and/or the second connecting mechanism is a diaphragm coupler.

The diaphragm coupling is used as the first connecting mechanism to connect the first dynamometer and the second dynamometer, and the diaphragm coupling is used as the second connecting mechanism to connect the second dynamometer and the bearing seat.

Further, the third connecting mechanism is a cross universal shaft coupler. The cross universal shaft coupler is used as a third connecting mechanism for connecting the output shaft of the engine to be tested with the output shaft of the bearing seat, and the cross universal shaft coupler has better support for shaft centering, so that the connection of the engine to be tested is more flexible and convenient.

Furthermore, an elastic coupling is further arranged between the third connecting mechanism and the output shaft of the engine to be tested. Through setting up the elastic coupling, can absorb the torsional vibration energy that produces on the engine shafting that awaits measuring, protect the intensity in the whole shafting direction of twisting.

Furthermore, a first protective cover is arranged outside the first connecting mechanism, and/or a second protective cover is arranged outside the second connecting mechanism, and/or a third protective cover is arranged outside the third connecting mechanism. Through setting up first safety cover, second safety cover and third safety cover, can prevent that at the during operation, high-speed pivoted part flies out and causes the damage to outside personnel or article, also prevents simultaneously by outside flying to come the foreign matter and hit.

Further, the tandem engine test stand according to an embodiment further comprises a first dynamometer base for mounting the first dynamometer, a second dynamometer base for mounting the second dynamometer, and a bearing seat base for mounting the bearing seat; the first dynamometer base is provided with a first support frame extending towards the second dynamometer, the second dynamometer base is provided with a second support frame extending towards the bearing seat, and the bearing seat base is provided with a third support frame extending towards the direction of the engine to be tested; the first protection cover is arranged on the first support frame, the second protection cover is arranged on the second support frame, and the third protection cover is arranged on the third support frame.

The series engine test bed based on the structure uses the first support frame, the second support frame and the third support frame to respectively fixedly support the first protective cover, the second protective cover and the third protective cover, and is simple and firm in structure.

Furthermore, a support column is further arranged on the third support frame to support the third connecting mechanism.

Based on this structure, can conveniently carry on third coupling mechanism when the engine that awaits measuring is installed.

Furthermore, a first dynamometer electric control box is arranged on one side of the first dynamometer base, and a second dynamometer electric control box is arranged on one side of the second dynamometer base. Install the electric box by the base directly, do not occupy extra space, and make things convenient for the wiring.

Further, the first dynamometer and the second dynamometer are both electric dynamometers.

The test bed based on the serial connection of the two electric power dynamometers has the advantages that on the premise that different working modes are flexibly selected to meet engines to be tested in different power ranges, the control precision is good, the dynamic response is fast, and the energy generated by the engines can be converted into electric energy to be fed back to a power grid for utilization.

According to the series engine test bed, two dynamometers are connected in series through the first connecting mechanism, then the output shaft of one dynamometer is connected with the bearing seat and is connected with an engine to be tested through the supporting shaft of the bearing seat, and therefore the test on the engine to be tested is achieved. The series engine test bed based on the structure can selectively operate any one dynamometer or simultaneously operate two dynamometers to test the engine to be tested according to the power range of the engine to be tested, so that the test power range of one test bed covers more engine types, and the mechanical structure does not need to be detached during switching, and the test bed is flexible and quick.

Drawings

The foregoing and other features and advantages of the utility model will become more apparent to those skilled in the art to which the utility model relates upon consideration of the following detailed description of a preferred embodiment of the utility model with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of the overall structure of a tandem engine test stand according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a tandem engine test stand configuration according to one embodiment of the present invention.

Wherein the reference numbers are as follows:

1 a first dynamometer, 2 a second dynamometer, 3 a bearing seat, 10 a first connecting mechanism and 12 an expansion sleeve

19 a first dynamometer electric control box, 20 a second connecting mechanism and 29 a second dynamometer electric control box

30 third connecting mechanism, 31 supporting shaft, 33 torque sensor and 40 elastic coupling

60 first protective cover, 70 second protective cover, 80 third protective cover, 100 fixed platform

101 first dynamometer base, 110 first supporting frame, 201 second dynamometer base

210 second support, 301 bearing seat base, 310 third support, 320 support

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by the following examples.

As shown in FIG. 1, a tandem engine test stand according to one embodiment includes: a fixed platform 100, a first dynamometer 1, a second dynamometer 2 and a bearing seat 3; the first dynamometer 1 and the second dynamometer 2 are fixedly arranged on the fixed platform 100, and an output shaft of the first dynamometer 1 is connected with a first output shaft of the second dynamometer 2 through a first connecting mechanism 10; the bearing seat 3 comprises at least one supporting shaft 31, a first output end of the supporting shaft 31 is connected with a second output shaft of the second dynamometer 2 through a second connecting mechanism 20, and a second output end of the supporting shaft 31 is connected with an output shaft of the engine to be tested through a third connecting mechanism 30.

Specifically, the first dynamometer 1 is, for example, a single-shaft dynamometer, the second dynamometer 2 is a double-shaft dynamometer, and an output shaft of the first dynamometer 1 is connected with one output shaft of the second dynamometer 2 through a first connecting mechanism 10; a bearing seat 3 is arranged between the second dynamometer 2 and the engine to be tested, the bearing seat 3 which is relatively robust is arranged to play a role of supporting a shaft 31 system and isolating vibration, the bearing seat 3 comprises the supporting shaft 31 and a corresponding bearing, the other output shaft of the second dynamometer 2 is connected with the first output end of the supporting shaft 31 of the bearing seat 3 through a second connecting mechanism 20, the second output end of the supporting shaft 31 is connected with the output shaft of the engine to be tested through a third connecting mechanism 30, and in addition, a torque sensor 33 can be further arranged on the first output end of the supporting shaft 31 to obtain torque parameters. In this embodiment, the engine to be tested is, for example, a diesel engine, but may be other types of engines, and is not limited herein.

Based on the tandem engine test bed of the embodiment, two dynamometers are connected in series through the first connecting mechanism 10, then the output shaft of one dynamometer is connected with the bearing seat 3 and is connected with the engine to be tested through the supporting shaft 31 of the bearing seat 3, so that the test on the engine to be tested is realized. The two dynamometers are connected in series, and any one dynamometer or the two dynamometers can be selected to operate to test the engine to be tested according to the power range of the engine to be tested, so that the test power range of one test bed covers more types of engines.

Further, the first connecting means 10 is a diaphragm coupling and/or the second connecting means 20 is a diaphragm coupling.

As shown in fig. 2, the first connection mechanism 10 is a diaphragm coupling, and connects the output shaft of the first dynamometer 1 and the first output shaft of the second dynamometer 2 by using the diaphragm coupling and a fastener such as a bolt and a nut. Of course, the person skilled in the art can also install the expansion sleeve 12 in a manner of matching, for example, hydraulic or mechanical or other manner, which is well known to those skilled in the art and will not be described in detail herein; the second connecting mechanism 20 is a diaphragm coupling, and a second output shaft of the second dynamometer 2 is connected with a first output end of the supporting shaft 31 in the bearing block 3 through the same matching of the diaphragm coupling and the expansion sleeve. Due to the characteristics of strong rigidity, stable torque transmission and the like of the diaphragm coupling in the torsion direction, the connection between the first dynamometer 1 and the second dynamometer 2 and the connection between the second dynamometer 2 and the bearing seat 3 are stable and efficient.

Further, third coupling mechanism 30 is cross universal shaft coupling, connects the back shaft 31 of bearing frame 3 and the output shaft of the motor that awaits measuring through using cross universal shaft coupling, can support the misalignment condition of better back shaft, consequently better connection engine that awaits measuring realizes quick installation and adjustment engine.

Further, an elastic coupling 40 is arranged between the third connecting mechanism 30 and the output shaft of the engine to be tested. The elastic coupling 40 is made of rubber, for example, a high-elastic high-damping coupling, and one end of the elastic coupling is connected to the output shaft of the engine to be tested through a connecting member such as a flange, and the other end of the elastic coupling is connected to the cross universal shaft coupling of the third connecting mechanism 30. The torsional vibration energy generated on the shaft system of the engine to be tested can be absorbed through the elastic coupling 40, and the strength of the whole shaft system in the torsional direction is protected.

Further, a first protective cover 60 is disposed outside the first connecting mechanism 10, and/or a second protective cover 70 is disposed outside the second connecting mechanism 20, and/or a third protective cover 80 is disposed outside the third connecting mechanism 30. Specifically, the first protective cover 60, the second protective cover 70 and the third protective cover 80 are made of, for example, sheet metal, and respectively protect all or part of the first connecting mechanism 10, all or part of the second connecting mechanism 20 and all or part of the third connecting mechanism 30, so as to prevent the parts rotating at high speed from flying out and injuring people or objects during operation, and prevent the parts from being hit by foreign objects flying out and injuring the people or the objects. In one implementation, the first protective cover 60, the second protective cover 70 and the third protective cover 80 are configured to be fixed at one end and movable at the other end, and holes may be further formed on the outer surfaces of the first protective cover 60, the second protective cover 70 and the third protective cover 80 to facilitate observation of the state of the shaft or the connecting mechanism inside the protective covers, and enhance the heat dissipation effect; the outside of the protective cover can be provided with a handle to facilitate opening and closing.

Further, the tandem engine test stand according to still another embodiment further includes a first dynamometer base 101 for mounting the first dynamometer 1, a second dynamometer base 201 for mounting the second dynamometer 2, and a bearing seat base 301 for mounting the bearing seat 3; the first dynamometer base 101 is provided with a first supporting frame 110 extending towards the direction of the second dynamometer 2, the second dynamometer base 201 is provided with a second supporting frame 210 extending towards the direction of a bearing seat 3, and the bearing seat base 301 is provided with a third supporting frame 310 extending towards the direction of the engine to be tested; wherein, the first protective cover 60 is disposed on the first support frame 110, the second protective cover 70 is disposed on the second support frame 210, and the third protective cover 80 is disposed on the third support frame 310.

Specifically, the first dynamometer base 101, the second dynamometer base 201, and the bearing seat base 301 are respectively fixed on the fixed platform 100 by fasteners such as bolts, and the heights of the first dynamometer 1, the second dynamometer 2, and the bearing seat 3 are respectively adapted to the heights of the first dynamometer 1, the second dynamometer 2, and the bearing seat 3, so as to ensure that the respective output shafts of the first dynamometer 1, the second dynamometer 2, and the bearing seat 3 are respectively installed on the respective bases and are kept at the same height as much as possible. The first dynamometer 1 is mounted on the first dynamometer base 101 through bolts and nuts, for example, the second dynamometer 2 is mounted on the second dynamometer base 201 through bolts and nuts, for example, the bearing seat 3 is mounted on the bearing seat base 301 through bolts and nuts, for example, the first support frame 110 is a tripod extending from the first dynamometer base 101 to the second dynamometer 2, the second support frame 210 is a tripod extending from the second dynamometer base 201 to the bearing seat 3, the third support frame 310 is a support plate-shaped structure with a certain thickness extending from the bearing seat base 301 to the direction of the engine to be tested, the first protective cover 60, the second protective cover 70, and the third protective cover 80 may be fixed to the first support bracket 110, the second support bracket 210, and the third support bracket 310, respectively, by fastening members such as bolts and nuts.

Based on the series engine test bench of this structure, set up first support frame 110, second support frame 210 and third support frame 310 through extending on corresponding the base and carry out the fixed stay to first safety cover 60, second safety cover 70, third safety cover 80 respectively, simple structure, firm need not additionally install.

Further, a support column 320 is disposed on the third support frame 310 to support the third connecting mechanism 30. Specifically, the upper end surface of the supporting column 320 may be a groove adapted to the shape of the bottom of the third connecting mechanism 30 (e.g., a universal joint cross coupling). The supporting column 320 is arranged to facilitate good carrying and supporting of the engine shaft to be tested and the third connecting mechanism 30 when the engine shaft to be tested and the third connecting mechanism are installed. It should be noted that the support column 320 should be robust, rather than light and thin, or otherwise susceptible to resonance during testing.

Further, a first dynamometer electrical control box 19 is arranged on one side of the first dynamometer base 101, and a second dynamometer electrical control box 29 is arranged on one side of the second dynamometer base 201. The first dynamometer electrical control box 19 is for example placed with the sensor cable or other electronic control components that are used for gathering different signals such as the temperature signal of first dynamometer 1, torque signal, and the like, and equally, the first dynamometer electrical control box 20 is for example placed with the sensor cable or other electronic control components that are used for gathering different signals such as the temperature signal of second dynamometer 2, torque signal, and the like, with electrical box direct mount by the base, do not occupy extra space, and make things convenient for the wiring.

Further, the first dynamometer 1 and the second dynamometer 2 are both electric dynamometers. The test bed is characterized in that two electric power dynamometers are connected in series, on the premise that different working modes are flexibly selected to meet engines to be tested in different power ranges, the control precision is good, the dynamic response is fast, and energy generated by the engines can be converted into electric energy to be fed back to a power grid for utilization.

The tandem engine test stand according to the present invention, for example: the electric series test bed is provided with a 4000kW electric dynamometer (a first dynamometer) and a 2000kW electric dynamometer (a second dynamometer), an engine capable of testing the 4000kW-6000kW power level when the series operation mode of the electric dynamometers is selected, an engine capable of testing the 500kW-2000kW power level when the second electric dynamometer is independently operated is selected, and an engine capable of testing the 2000kW-4000kW power level when the first dynamometer is independently operated is selected. The set of electrically-connected engine fixing platform is equivalent to three sets of fixing platforms with different power grades, can be used for measuring parts to be measured with three different power grades, and greatly saves time, space and economic cost.

The tandem engine test bed has the following advantages:

1. different operation modes can be selected according to needs, and the requirement that the test power range covers the types of the engines to be tested as much as possible under one test bed is met.

2, the operation modes are freely switched, the mechanical structure does not need to be disassembled, and the operation is flexible and quick.

3. The control precision is high, the dynamic response is fast, and the energy that the engine produced can be converted into the electric energy and then feed back to the electric wire netting and utilize, and long-term operation is with low costs.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims

1. Tandem engine test bench, its characterized in that includes:

a stationary platform (100);

the device comprises a first dynamometer (1) and a second dynamometer (2), wherein the first dynamometer (1) and the second dynamometer (2) are fixedly mounted on a fixed platform (100), and an output shaft of the first dynamometer (1) is connected with a first output shaft of the second dynamometer (2) through a first connecting mechanism (10);

the bearing seat (3), the bearing seat (3) are including back shaft (31), the first output of back shaft (31) pass through second coupling mechanism (20) with the second output shaft of second dynamometer (2), the second output of back shaft (31) passes through third coupling mechanism (30) and is connected with the output shaft of the engine that awaits measuring.

2. Series engine test bench according to claim 1, characterized in that the first connection means (10) is a diaphragm coupling and/or the second connection means (20) is a diaphragm coupling.

3. The tandem engine test stand of claim 2, wherein said third connection mechanism (30) is a cross-cardan shaft coupling.

4. The tandem engine test stand according to claim 3, characterized in that an elastic coupling (40) is further provided between the third connection mechanism (30) and the output shaft of the engine under test.

5. Series engine test bench according to any of claims 1-4, characterized in that a first protective cover (60) is arranged outside the first connection means (10), and/or a second protective cover (70) is arranged outside the second connection means (20), and/or a third protective cover (80) is arranged outside the third connection means (30).

6. The tandem engine test stand of claim 5, further comprising a first dynamometer base (101) for mounting the first dynamometer (1), a second dynamometer base (201) for mounting the second dynamometer (2), and a bearing housing base (301) for mounting the bearing housing (3); the first dynamometer base (101) is provided with a first supporting frame (110) extending towards the direction of the second dynamometer (2), the second dynamometer base (201) is provided with a second supporting frame (210) extending towards the direction of the bearing seat (3), and the bearing seat base (301) is provided with a third supporting frame (310) extending towards the direction of the engine to be tested; wherein the first protective cover (60) is disposed on the first support frame (110), the second protective cover (70) is disposed on the second support frame (210), and the third protective cover (80) is disposed on the third support frame (310).

7. The tandem engine test stand of claim 6, wherein a support column (320) is further provided on the third support frame to support the third connection mechanism (30).

8. The tandem engine test stand according to claim 6 or 7, characterized in that a first dynamometer electrical control box (19) is arranged on the side of the first dynamometer base (101) and a second dynamometer electrical control box (29) is arranged on the side of the second dynamometer base (201).

9. The series engine test stand according to claim 1, characterized in that the first dynamometer machine (1) and the second dynamometer machine (2) are both electric dynamometer machines.