CN110646124A

CN110646124A - Underwater propeller testing device

Info

Publication number: CN110646124A
Application number: CN201910933186.9A
Authority: CN
Inventors: 贺继林; 李俊松; 胡刚毅; 喻小鹏; 陈冠宇
Original assignee: Ezhou Institute of Industrial Technology Huazhong University of Science and Technology
Current assignee: Ezhou Institute of Industrial Technology Huazhong University of Science and Technology
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-01-03
Anticipated expiration: 2039-09-29
Also published as: CN110646124B

Abstract

The invention discloses a testing device for an underwater propeller, which adopts a coupler to simultaneously measure the pushing force and the pulling force of the propeller, arranges a pressure sensor in a sealed box body, places the pressure sensor under the water during testing to directly receive the pushing force and the pulling force of the propeller, and simultaneously can greatly weaken the influence of turbulent flow generated by the propeller and improve the testing precision. The device has the advantages of simple structure, small volume, no need of repeated installation, high applicability, low cost and convenient operation.

Description

Underwater propeller testing device

Technical Field

The invention belongs to the field of underwater testing, and particularly relates to an underwater propeller testing device.

Background

An underwater propeller, also called an underwater booster, is a power source of most underwater robots. The correct establishment of the propeller model has great significance for controlling the underwater robot, so that more accurate propeller thrust parameters need to be obtained.

At present, the most mainstream thrust testing device adopts a lever principle, namely, an underwater propeller and a thrust sensor are arranged at two ends of a lever, the middle point of the lever is hinged to a rotating shaft, and the thrust of the propeller is measured by utilizing an equal-force arm principle. The testing device has the advantages of complex structure, large device volume and low testing precision. In addition, because the test is mostly carried out in a limited water area, the turbulent flow generated by the work of the propeller can influence the test, so that the test result is inaccurate.

Moreover, most of the existing thrusters cannot measure the thrust and the tension of the thrusters simultaneously, and need to be installed for many times or cannot measure the tension at all.

Disclosure of Invention

Aiming at the defects or the improvement requirements of the prior art, the invention provides a testing device for an underwater propeller, which aims to solve the technical problems that the existing propeller cannot measure the pushing force and the pulling force simultaneously, and the testing result is easily influenced by turbulent flow.

In order to achieve the above object, according to one aspect of the present invention, there is provided an underwater propeller testing apparatus, including a support, a sealed box, a push-pull assembly, and a slide rail assembly, where the sealed box and the slide rail assembly are respectively disposed on the support, where the push-pull assembly is provided with an installation port for connecting a propeller, a pressure sensor is disposed in the sealed box, one end of the push-pull assembly is connected to the pressure sensor through a coupler, and the other end of the push-pull assembly is disposed on the slide rail assembly.

Furthermore, the push-pull assembly comprises a center connecting plate, a push block and a push rod which are sequentially connected, the center connecting plate is arranged on the slide rail assembly, and the push rod is connected with the coupler.

Further, the push rod is in threaded connection with the coupler, and the coupler is in threaded connection with the pressure sensor.

Furthermore, the testing device also comprises a digital display meter connected with the pressure sensor.

Further, the coupler is a threaded cylinder or a coupling sleeve.

Further, the sealed box body comprises an upper cover, a bottom plate, a front plate, a rear plate, a first side plate and a second side plate; the coupler is arranged in the sealed box body, and part of the push-pull assembly penetrates through the front plate to be connected with the coupler.

Further, a latex film is arranged in front of the front plate, and a front pressing plate is arranged in front of the latex film.

Furthermore, a rear connecting plate is arranged in front of the rear plate, the pressure sensor is connected to the rear connecting plate, and a latex film is arranged in front of the rear connecting plate and the rear plate.

Furthermore, an upper connecting plate is arranged below the upper cover, and a groove for installing an O-shaped sealing ring is formed in the upper connecting plate.

Furthermore, the slide rail assembly comprises a slide block, a slide rod and pins, wherein the slide rod is positioned between the pair of pins, the pins are connected to the support, the slide block is sleeved on the slide rod, the central connecting plate is connected to the slide block, and the slide block slides relative to the slide rod without resistance.

In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:

the invention provides a testing device for an underwater propeller, which is characterized in that a pressure sensor is arranged in a waterproof sealed box body, a coupler is adopted to simultaneously measure the pushing force and the pulling force of the propeller, the pressure sensor can be placed underwater during testing to directly receive the pushing force and the pulling force of the propeller, the testing precision is higher, the device does not need to be installed for many times, and the device is simple in structure, small in size, low in cost and convenient to operate. In addition, the device can also weaken the influence of the flocculation flow that propeller self produced greatly because of the small and exquisite size, has further improved the measuring accuracy.

Drawings

FIG. 1 is a schematic perspective view of a testing device according to the present invention;

FIG. 2 is a side view of the testing device of the present invention;

FIG. 3 is a top view of the testing device of the present invention;

FIG. 4 is a schematic structural diagram of a sealed box in the testing device of the present invention;

FIG. 5 is a schematic structural diagram of a slide rail assembly of the testing apparatus of the present invention;

the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:

1. aluminum strips; 2. a slide rail assembly; 3. corner connectors; 4. a support; 5. a pressure sensor; 6. a coupling; 7. a push rod; 8. a push block; 9. a central connecting plate; 10. a propeller; 11. a digital display meter; 12. an upper cover; 13. a front plate; 14. a front platen; 15. a latex film; 16. a base plate; 17. an upper connecting plate; 18. a second side plate; 19. a rear connecting plate; 20. a back plate; 21. a first side plate; 22. a slider; 23. a slide bar; 24. a pin.

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 below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The invention provides a testing device for an underwater propeller, which comprises a support 4, a sealed box body, a push-pull component and a slide rail assembly 2, wherein the sealed box body and the slide rail assembly 2 are respectively arranged on the support 4, as shown in figures 1 and 2. Wherein, the push-pull component is provided with a mounting opening for connecting the propeller 10. Preferably, the perforated form of the mounting opening can be replaced to connect different models of said pushers 10. A pressure sensor 5 and a coupler 6 are arranged in the sealed box body, and the coupler 6 is used for connecting the push-pull assembly and the pressure sensor 5 so as to realize the final transmission of push-pull force. Preferably, the pressure sensor 5 is a miniature bellows type pull pressure sensor, and the coupling 6 is a threaded cylinder or a coupling sleeve.

According to the underwater propeller testing device with the structure, the pressure sensor is arranged in the waterproof sealing box body, the pushing force and the pulling force of the propeller are measured simultaneously by the coupler, the pressure sensor can be placed underwater during testing, the pushing force and the pulling force of the propeller are directly received, and the testing precision is higher.

Further, the push-pull assembly comprises a central connecting plate 9, a push block 8 and a push rod 7 which are sequentially connected, and a mounting opening for connecting a propeller 10 is formed in the central connecting plate 9. Preferably, the central web 9 is connected to the propeller 10 by means of a screw thread.

Support 4 includes aluminium strip 1 and angle sign indicating number 3, and angle sign indicating number 3 accessible T type nut and bolt are installed to support 4 to realize support 4's fixed. The slide rail assembly 2 is arranged on the aluminum strip 1, and the aluminum strip 1 is used for heightening the slide rail assembly 2 to avoid the height difference of the two ends.

As shown in fig. 3, the testing device further comprises a digital display meter 11 located above water, the digital display meter 11 is connected with the pressure sensor 5 through a thread passing bolt, and can be used for setting a measuring unit, adjusting the measuring precision and recording the measured peak-valley value. Preferably, the digital display table 11 is an HY-CHB digital display table.

As shown in fig. 4, the sealed box includes an upper cover 12, an upper connecting plate 17, a bottom plate 16, a front plate 13, a front pressure plate 14, a rear connecting plate 19, a rear plate 20, a first side plate 21, and a second side plate 18, wherein corresponding grooves are provided below the upper connecting plate 17 and above the bottom plate 16, and the front plate 13, the rear plate 20, the first side plate 21, and the second side plate 18 are inserted into the grooves and sealed by glue pouring after connection. The upper connecting plate 17 is provided with a groove for mounting an O-ring for sealing when connected with the upper cover 12 disposed above the groove. Preferably, the O-shaped sealing ring is a fluorine rubber O-shaped sealing ring. A latex film 15 is arranged in front of the front plate 13, a front pressing plate 14 is arranged in front of the latex film 15, and the front plate 13, the latex film 15 and the front pressing plate 14 are connected and pressed through bolts. Preferably, latex membrane 15 is perforated midway along front platen 14 to allow push rod 7 to pass through the hole and connect to coupling 6. The latex film 15 is additionally provided with 4 holes for connecting the front pressing plate 14, the latex film 15 and the front plate 13 through bolts. The second side panel 18 is a perforated side panel to allow passage of the threaded bolt of figure 3. A latex film is also arranged between the rear connecting plate 19 and the rear plate 20, and the rear connecting plate 19, the latex film and the rear plate 20 are fixed on the bracket 4 in the figure 1 through bolts and are compressed tightly. Meanwhile, the rear connection plate 19 is screwed with the pressure sensor 5 in fig. 2. Preferably, all bolted connection departments all adopt the encapsulating to seal in the sealed box to prevent that water from flowing into the sealed box.

As shown in fig. 2 and 5, the slide rail assembly 2 includes a slide block 22, a slide rod 23, and pins 24, wherein the slide block 22 is sleeved on the slide rod 23, the slide rod 23 is located between a pair of pins 24, and the pins 24 are connected to the bracket 4 in fig. 1. The central connecting plate 9 is connected to the sliding block 22 and slides relative to the sliding rod 23 without resistance, so that the resistance applied during movement is ensured to be completely from the push rod 7, and the push-pull force of the propeller 10 is accurately transmitted to the pressure sensor 5.

The working mode of the underwater propeller testing device provided by the invention is as follows: the push-pull force generated by the propeller 10 is sequentially transmitted to the pressure sensor 5 through the central connecting plate 9, the push block 8, the push rod 7 and the coupler 6, and finally the push-pull force value of the propeller 10 is displayed on the digital display meter 11. In addition, the movement direction of the propeller 10 is limited by the sliding rail assembly 2 during operation, so that the self resistance is prevented from interfering with the test result.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The underwater propeller testing device is characterized by comprising a support, a sealing box body, a push-pull component and a slide rail assembly, wherein the sealing box body and the slide rail assembly are respectively arranged on the support, a mounting hole for connecting a propeller is formed in the push-pull component, a pressure sensor is arranged in the sealing box body, one end of the push-pull component is connected with the pressure sensor through a coupler, and the other end of the push-pull component is arranged on the slide rail assembly.

2. The underwater propeller testing device of claim 1, wherein the push-pull assembly comprises a central connecting plate, a push block and a push rod which are sequentially connected, the central connecting plate is arranged on the slide rail assembly, and the push rod is connected with the coupler.

3. The underwater propulsor testing apparatus of claim 2, wherein the push rod is threadably connected to the coupling, and the coupling is threadably connected to the pressure sensor.

4. The underwater propulsor testing apparatus of claim 1, further comprising a digital display meter connected to the pressure sensor.

5. The underwater propulsor testing apparatus of claim 1 wherein the coupling is a threaded barrel or a coupling sleeve.

6. The underwater propeller testing device of claim 1, wherein the sealed box body comprises an upper cover, a bottom plate, a front plate, a rear plate, a first side plate, and a second side plate; the coupler is arranged in the sealed box body, and part of the push-pull assembly penetrates through the front plate to be connected with the coupler.

7. The underwater propeller testing device of claim 6, wherein a latex film is disposed in front of each front plate, and a front pressing plate is disposed in front of each latex film.

8. The underwater propeller testing device of claim 6, wherein a rear connection plate is disposed in front of the rear plate, the pressure sensor is connected to the rear connection plate, and a latex film is disposed in front of the rear connection plate and the rear plate.

9. The underwater propeller testing device of claim 6, wherein an upper connecting plate is arranged below the upper cover, and a groove for installing an O-shaped sealing ring is arranged on the upper connecting plate.

10. The underwater propulsor testing apparatus of claim 2, wherein the slide rail assembly includes a slide block, a slide rod, and pins, the slide rod is located between a pair of the pins, the pins are connected to the bracket, the slide block is sleeved on the slide rod, the center link plate is connected to the slide block, and the slide block slides relative to the slide rod without resistance.