Propeller hydrodynamic characteristics testing device for super-high-speed circulating water tank

Abstract

The application discloses a propeller hydrodynamic characteristic testing device for a super-high-speed circulating water tank, which comprises a circulating water tank test section, the upper portion of the circulating water tank test section is provided with a mounting frame, the mounting frame is fixedly connected with the upper end of a hanging sword suspension frame, the lower end of the hanging sword suspension frame is fixedly provided with a propeller hydrodynamic performance tester for measuring propeller thrust and torque, the mounting frame is fixedly provided with a water sealing plate mechanism for adjusting the free liquid surface state of the circulating water tank and a sealed cabin cover for adjusting the state of a cavitation water cylinder, and the sealed cabin cover is fixed to the upper end of the mounting frame; the outer portion of the circulating water tank test section is provided with a first illuminating light source, a second illuminating light source and a high-speed camera for shooting the cavitation process of the propeller through the circulating water tank test section; and the water sealing plate mechanism and the propeller hydrodynamic performance tester are arranged in the circulating water tank test section. The application can realize the comprehensive testing of the hydrodynamic performance and cavitation of the propeller under the super-high-speed free liquid surface state and the cavitation water cylinder state.

Description

Technical Field

[0001] This invention relates to a device for testing the hydrodynamic characteristics of a propeller in an ultra-high-speed circulating water tank, belonging to the field of ship propeller hydrodynamic characteristic testing. Background Technology

[0002] The hydrodynamic characteristics of ship propellers mainly include thrust characteristics, torque characteristics, and cavitation. Based on the test results of propeller hydrodynamic characteristics, the influence of various geometric parameters of the propeller on hydrodynamic performance and cavitation can be systematically analyzed, pointing out the direction for the optimal design of the propeller.

[0003] To achieve comprehensive testing of the hydrodynamic characteristics of propellers under both ultra-high-speed free surface and cavitation tank conditions, the experiment needs to be conducted in an ultra-high-speed circulating water tank. Currently, the main testing device for propeller hydrodynamic characteristics is the propeller power instrument, which is mostly suitable for towed pools and cavitation tanks. There is a lack of a comprehensive testing device for propeller hydrodynamic characteristics in both open free surface and closed cavitation conditions in an ultra-high-speed circulating water tank. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to achieve comprehensive testing of the hydrodynamic performance and cavitation of a propeller in both ultra-high-speed free liquid surface and cavitation tank states.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is to provide a propeller hydrodynamic characteristic testing device for an ultra-high-speed circulating water tank. The device is characterized by comprising a circulating water tank test section, with a mounting frame at the upper part of the test section. The mounting frame is fixedly connected to the upper end of a scissor-mounted suspension frame. A propeller hydrodynamic performance tester for measuring propeller thrust and torque is fixed at the lower end of the scissor-mounted suspension frame. A water-sealing plate mechanism for adjusting the free surface state of the circulating water tank and a sealing chamber cover for adjusting the cavitation water cylinder state are fixed on the mounting frame, with the sealing chamber cover fixed to the upper end of the mounting frame. The circulating water tank test section is externally equipped with a first illumination source, a second illumination source, and a high-speed camera that captures the cavitation process of the propeller through the circulating water tank test section. The water-sealing plate mechanism and the propeller hydrodynamic performance tester are located inside the circulating water tank test section.

[0006] Preferably, the circulating water tank test section is provided with an plexiglass observation window that allows a high-speed camera to pass through.

[0007] Preferably, the first and second lighting sources are symmetrically arranged on both sides of the outer side of the circulating water tank test section, and the high-speed camera is fixed at the bottom of the circulating water tank test section; both the first and second lighting sources are high-intensity, high-brightness light sources matched with the high-speed camera.

[0008] Preferably, the water sealing plate mechanism includes a water sealing plate frame and multiple water sealing plates. The multiple water sealing plates are respectively fixed at the lower end of the water sealing plate frame. The mounting frame is connected to the water sealing plate frame through multiple screws. Each screw has a corresponding handwheel. The free liquid level is adjusted by rotating the handwheel to control the raising and lowering of the water sealing plate.

[0009] Preferably, the propeller hydrodynamic performance tester includes a lower housing, a front housing fixed to the front end of the lower housing, an upper housing fixed to the upper end of the lower housing, the lower housing fixed to the scimitar by a fixing bracket, and the scimitar fixed to the lower end of the scimitar suspension frame; a watertight motor and a watertight thrust torque measuring instrument are fixed on the inner plane of the lower housing, the watertight motor and the watertight thrust torque measuring instrument are connected by a flexible coupling, the transmission end of the watertight thrust torque measuring instrument is connected to the tail shaft, and the end of the tail shaft is connected to the propeller.

[0010] Preferably, the watertight motor is fixed to the inner plane of the lower housing by a front end fixing seat and a support seat.

[0011] Preferably, the tail shaft is supported in the lower housing by a first water-lubricated bearing and a second water-lubricated bearing.

[0012] Preferably, the propeller is connected to the end of the tail shaft via a flat key and is axially fixed by a flow guide cap.

[0013] Preferably, the front housing is fixed to the front end of the lower housing via a first connecting block, a second connecting block, a third connecting block, a fourth connecting block, and a fixing pin; the front housing and the lower housing are fixedly connected to the first connecting block, the second connecting block, the third connecting block, and the fourth connecting block via countersunk screws; the upper housing is fixed to the upper end of the lower housing via a fifth connecting block, a sixth connecting block, and a semi-annular connecting block; the upper housing and the lower housing are fixedly connected to the fifth connecting block, the sixth connecting block, and the semi-annular connecting block via countersunk screws; the lower housing and the scimitar are fixed to the fixing frame via hexagonal socket head cap screws, and the scimitar and the scimitar suspension frame are fixedly connected via bolts; the watertight thrust torque measuring instrument is fixed to the inner plane of the lower housing via hexagonal socket head cap screws; the tail shaft is connected to the transmission end of the watertight thrust torque measuring instrument via flange bolts.

[0014] Preferably, the acquisition line of the propeller hydrodynamic performance tester is connected to the acquisition device through the wire channel inside the scimitar.

[0015] The beneficial technical effects of this invention are:

[0016] The propeller hydrodynamic characteristic testing device of the present invention includes a propeller hydrodynamic performance tester, a sealed chamber cover, a water-sealing plate mechanism, a scissor-mounted suspension frame, a mounting frame, a high-speed camera, a lighting source, and a circulating water tank test section. The propeller hydrodynamic performance tester employs a watertight motor, a watertight thrust-torque measuring instrument, and a water-lubricated bearing, thus eliminating the need for a sealed outer casing, reducing the difficulty and cost of casing processing, and saving processing time. In the ultra-high-speed circulating water tank test section, the propeller hydrodynamic performance tester is fixed to the mounting frame via the scissor-mounted suspension frame. The water-sealing plate mechanism is installed below the mounting frame, and the sealed chamber cover is installed above the mounting frame. The propeller hydrodynamic performance tester is used to measure propeller thrust and torque. The system measures the propeller's hydrodynamic characteristics under ultra-high-speed free surface and cavitation tank conditions by adjusting the lifting and lowering of the sealing plate on the sealing plate mechanism and the sealing performance of the sealing tank cover. A high-speed camera and lighting source are set up on the outside of the circulating water tank test section to film the propeller's cavitation process through the transparent observation window of the tank's plexiglass. This solves the problem that the ultra-high-speed circulating water tank lacks the supporting measurement equipment for propeller thrust, torque, and cavitation testing under ultra-high-speed free surface and cavitation tank conditions, providing model test conditions for comprehensive testing of propeller hydrodynamic characteristics and realizing comprehensive testing of propeller hydrodynamic performance and cavitation under ultra-high-speed free surface and cavitation tank conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a propeller hydrodynamic characteristic testing device for an ultra-high-speed circulating water tank in the test section of the circulating water tank.

[0018] Figure 2 This is a schematic diagram of a propeller hydrodynamic characteristic testing device for an ultra-high-speed circulating water tank in the test section of the circulating water tank without the sealed cover.

[0019] Figure 3 A schematic diagram of the mounting bracket and water sealing plate mechanism;

[0020] Figure 4 This is a schematic diagram of a propeller hydrodynamic performance tester.

[0021] Figure 5 This is a schematic diagram of the suspension structure of a propeller hydrodynamic performance tester;

[0022] Figure 6 This is a schematic diagram of the internal structure of a propeller hydrodynamic performance tester.

[0023] Figure 7 This is a schematic diagram of the rotor system of a propeller hydrodynamic performance tester. Detailed Implementation

[0024] To make the present invention more obvious and understandable, the following is a detailed description with preferred embodiments and in conjunction with the accompanying drawings.

[0025] The present invention provides a propeller hydrodynamic characteristic test device for a super-high-speed circulating water channel, as Figure 1 , Figure 2 shown. It includes a propeller hydrodynamic performance tester 1, a first lighting source 2, a high-speed camera 3, a second lighting source 4, a sealing hatch cover 5, a circulating water channel test section 6, a water sealing plate mechanism 7, a hanging sword suspension bracket 8, and a mounting bracket 9. A mounting bracket 9 is provided at the upper part of the circulating water channel test section 6. In the circulating water channel test section, the water sealing plate mechanism 7, the sealing hatch cover 5, and the hanging sword suspension bracket 8 are fixed to the mounting bracket 9. The propeller hydrodynamic performance tester 1 is fixed to the lower end of the hanging sword suspension bracket 8. The sealing hatch cover 5 is installed on the mounting bracket 9 and the upper end of the circulating water channel test section 6, which serves to seal the circulating water channel test section 6 and achieve the state of a cavitation tunnel. The water sealing plate mechanism 7 and the propeller hydrodynamic performance tester 1 are arranged inside the circulating water channel test section 6.

[0026] The propeller hydrodynamic performance tester 1 is used for measuring the thrust and torque of the propeller. The water sealing plate mechanism 7 and the sealing hatch cover 5 are used for adjusting the free liquid surface state and the cavitation tunnel state of the circulating water channel. The hanging sword suspension bracket 8 is used for connecting and fixing the propeller hydrodynamic performance tester 1 and the mounting bracket 9.

[0027] The high-speed camera 3, the first lighting source 2, and the second lighting source 4 are installed outside the tank body of the circulating water channel test section 6. Among them, the first lighting source 2 and the second lighting source 4 are symmetrically installed on both outer sides of the circulating water channel test section 6. The first lighting source 2 and the second lighting source 4 illuminate the process of the propeller generating cavitation through the plexiglass observation window on the circulating water channel test section 6; the first lighting source 2 and the second lighting source 4 are high-strength and high-brightness light sources supporting the high-speed camera 3, which are used to ensure the lighting supply during the shooting of the propeller generating cavitation inside the circulating water channel test section 6. The high-speed camera 3 is installed at the bottom of the circulating water channel test section 6. The high-speed camera 3 shoots the process of the propeller generating cavitation through the plexiglass observation window on the circulating water channel test section 6 to collect the cavitation morphology of the propeller blades.

[0028] As Figure 3As shown, the water sealing plate mechanism 7 includes a water sealing plate frame 10, a first lead screw 11, a second lead screw 14, a third lead screw 15, a fourth lead screw 18, a fifth lead screw 19, a sixth lead screw 22, a seventh lead screw 24, an eighth lead screw 26, a first handwheel 12, a second handwheel 13, a third handwheel 16, a fourth handwheel 17, a fifth handwheel 20, a sixth handwheel 21, a seventh handwheel 23, an eighth handwheel 25, a first water sealing plate 27, a second water sealing plate 28, a third water sealing plate 29, a fourth water sealing plate 30, a fifth water sealing plate 31, a sixth water sealing plate 32, a seventh water sealing plate 33, an eighth water sealing plate 34, a ninth water sealing plate 35, a tenth water sealing plate 36, and an eleventh water sealing plate 37.

[0029] The water sealing plate frame 10 is connected to the mounting bracket 9 via the first screw 11, the second screw 14, the third screw 15, the fourth screw 18, the fifth screw 19, the sixth screw 22, the seventh screw 24 and the eighth screw 26; the first water sealing plate 27, the second water sealing plate 28, the third water sealing plate 29, the fourth water sealing plate 30, the fifth water sealing plate 31, the sixth water sealing plate 32, the seventh water sealing plate 33, the eighth water sealing plate 34, the ninth water sealing plate 35, the tenth water sealing plate 36 and the eleventh water sealing plate 37 are respectively fixed on the lower end face of the water sealing plate frame 10.

[0030] The first handwheel 12, the second handwheel 13, the third handwheel 16, the fourth handwheel 17, the fifth handwheel 20, the sixth handwheel 21, the seventh handwheel 23, and the eighth handwheel 25 are respectively installed on the first lead screw 11, the second lead screw 14, the third lead screw 15, the fourth lead screw 18, the fifth lead screw 19, the sixth lead screw 22, the seventh lead screw 24, and the eighth lead screw 26. In the test section of the circulating water tank, the free liquid level is adjusted by rotating the eight handwheels to control the raising and lowering of the sealing plate.

[0031] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the propeller hydrodynamic performance tester 1 includes a front housing 38, a lower housing 39, an upper housing 40, a scissor 41, a propeller 42, a flow guide cap 43, a fixing pin 44, a fixing frame 45, a semi-annular connecting block 46, a first connecting block 48, a second connecting block 49, a third connecting block 50, a fourth connecting block 51, a fifth connecting block 52, a sixth connecting block 53, a watertight motor 54, a front end fixing seat 55, a support seat 56, a flexible coupling 57, a watertight thrust torque measuring instrument 58, a first water-lubricated bearing 59, a tail shaft 60, a flat key 61, and a second water-lubricated bearing 62.

[0032] The front housing 38 is fixed to the front end of the lower housing 39 by a first connecting block 48, a second connecting block 49, a third connecting block 50, a fourth connecting block 51, and a fixing pin 44. The front housing 38 and the lower housing 39 are fixed to the first connecting block 48, the second connecting block 49, the third connecting block 50, and the fourth connecting block 51 by countersunk screws.

[0033] The upper housing 40 is fixed to the upper end of the lower housing 39 by the fifth connecting block 52, the sixth connecting block 53, and the semi-annular connecting block 46. The upper housing 40 and the lower housing 39 are fixed to the fifth connecting block 52, the sixth connecting block 53, and the semi-annular connecting block 46 by countersunk screws.

[0034] The mounting bracket 45 is used to fix the lower housing 39 to the scissor 41, and the scissor 41 is fixed to the lower end of the scissor hanging frame 8. The lower housing 39 and the scissor 41 are fixed to the mounting bracket 45 with hex socket screws, and the scissor 41 is fixed to the scissor hanging frame 8 with bolts.

[0035] The watertight motor 54 is fixed to the inner plane of the lower housing 39 via the front fixing seat 55 and the support seat 56. The watertight thrust torque measuring instrument 58 is fixed to the inner plane of the lower housing 39. The watertight motor 54 and the watertight thrust torque measuring instrument 58 are connected via a flexible coupling 57. The front fixing seat 55 and the support seat 56 are fixed to the inner plane of the lower housing 39 via hexagon socket screws. The watertight thrust torque measuring instrument 58 is fixed to the inner plane of the lower housing 39 via hexagon socket screws.

[0036] The tail shaft 60 is connected to the drive end of the watertight thrust torque measuring instrument 58 and supported within the lower housing 39 via a first water-lubricated bearing 59 and a second water-lubricated bearing 62. The tail shaft 60 is connected to the drive end of the watertight thrust torque measuring instrument 58 via flange bolts.

[0037] The propeller 42 is mounted on the end of the tail shaft 60 via a flat key 61 and is axially fixed by a flow guide cap 43. The acquisition line of the propeller hydrodynamic performance tester 1 is connected to the data collector through the wire channel 47 inside the scimitar 41.

Claims

1. A propeller hydrodynamic characteristics testing device for a super high-speed circulating water channel, characterized in that, The application relates to a propeller water dynamic performance testing device, which comprises a circulating water tank test section (6), the upper portion of the circulating water tank test section (6) is provided with a mounting frame (9), the mounting frame (9) is fixedly connected with the upper end of a hanging sword suspension frame (8), the lower end of the hanging sword suspension frame (8) is fixedly provided with a propeller water dynamic performance tester (1) for measuring the thrust and torque of a propeller, the mounting frame (9) is fixedly provided with a water sealing plate mechanism (7) for adjusting the free liquid level of the circulating water tank and a sealing cabin cover (5) for adjusting the state of a cavitation water cylinder, and the sealing cabin cover (5) is fixed to the upper end of the mounting frame (9); the circulating water tank test section (6) is externally provided with a first illumination light source (2), a second illumination light source (4) and a high-speed camera (3) for shooting the cavitation process of the propeller through the circulating water tank test section (6); the water sealing plate mechanism (7) and the propeller water dynamic performance tester (1) are arranged in the circulating water tank test section (6). The first illumination light source (2) and the second illumination light source (4) are symmetrically arranged on the two sides of the circulating water tank test section (6), and the high-speed camera (3) is fixed to the bottom of the circulating water tank test section (6); the first illumination light source (2) and the second illumination light source (4) are high-strength and high-brightness light sources matched with the high-speed camera (3). The propeller water dynamic performance tester (1) comprises a lower shell (39), the front end of the lower shell (39) is fixedly provided with a front shell (38), the upper end of the lower shell (39) is fixedly provided with an upper shell (40), the lower shell (39) is fixed to a hanging sword (41) through a fixing frame (45), and the hanging sword (41) is fixed to the lower end of the hanging sword suspension frame (8); a water-tight motor (54) and a water-tight thrust torque measuring instrument (58) are fixed to the inner plane of the lower shell (39), the water-tight motor (54) and the water-tight thrust torque measuring instrument (58) are connected through an elastic coupling (57), the transmission end of the water-tight thrust torque measuring instrument (58) is connected with a tail shaft (60), and the tail end of the tail shaft (60) is connected with a propeller (42).

2. A propeller hydrodynamic characteristics testing device for a super high-speed circulating water channel according to claim 1, characterized in that, The circulating water tank test section (6) is provided with an organic glass observation window through which the high-speed camera (3) can be observed.

3. A propeller hydrodynamic characteristics testing device for super high speed circulating water channel as claimed in claim 1, characterized in that, The water sealing plate mechanism (7) comprises a water sealing plate frame (10) and a plurality of water sealing plates, the water sealing plates are fixed to the lower end of the water sealing plate frame (10) respectively, the mounting frame (9) is connected with the water sealing plate frame (10) through a plurality of lead screws, one hand wheel is arranged on each lead screw, and the free liquid level is adjusted by rotating the hand wheels to control the lifting of the water sealing plates.

4. A propeller hydrodynamic characteristics testing device for super high speed circulating water channel as claimed in claim 1, characterized in that, The water-tight motor (54) is fixed to the inner plane of the lower shell (39) through a front end fixing base (55) and a supporting base (56).

5. A propeller hydrodynamic characteristics testing device for super high speed circulating water channel as claimed in claim 1, wherein, The tail shaft (60) is supported in the lower shell (39) through a first water lubricating bearing (59) and a second water lubricating bearing (62).

6. A propeller hydrodynamic characteristics testing device for super high speed circulating water channel as claimed in claim 1, characterized in that, The propeller (42) is connected with the tail end of the tail shaft (60) through a flat key (61) and is axially fixed through a flow guide cap (43).

7. A propeller hydrodynamic characteristics testing device for super high speed circulating water channel as claimed in claim 1, wherein, The front shell (38) is fixed to the front end of the lower shell (39) through the first connecting block (48), the second connecting block (49), the third connecting block (50), the fourth connecting block (51) and the fixing pin (44); the front shell (38) and the lower shell (39) are fixedly connected through the countersunk screws and the first connecting block (48), the second connecting block (49), the third connecting block (50), the fourth connecting block (51); the upper shell (40) is fixed to the upper end of the lower shell (39) through the fifth connecting block (52), the sixth connecting block (53) and the semi-ring connecting block (46); the upper shell (40) and the lower shell (39) are fixedly connected through the countersunk screws and the fifth connecting block (52), the sixth connecting block (53), the semi-ring connecting block (46); the lower shell (39) and the pendant sword (41) are fixed through the inner hexagonal screw and the fixing frame (45), the pendant sword (41) is fixed through the bolt connection with the pendant sword suspension frame (8); the watertight thrust torque measuring instrument (58) is fixed to the inner plane of the lower shell (39) through the inner hexagonal screw; the tail shaft (60) is connected through the flange bolt with the transmission end of the watertight thrust torque measuring instrument (58).

8. A propeller hydrodynamic characteristics testing device for super high speed circulating water channel as claimed in claim 1, wherein, The acquisition line of the propeller hydrodynamic performance tester (1) is connected with the collector from the wire channel (47) in the inside of the pendant sword (41).

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