Lifting trim device for open water experiment propeller dynamometer

Abstract

The invention discloses a lifting trim device for a propeller dynamometer in an open water experiment. The lifting trim device is a measuring bridge track of two tracks which are arranged in parallel. And the dragging frame is connected to the measuring bridge track in a sliding manner. And the base is used for connecting the propeller dynamometer. The lifting adjusting mechanism is connected with the base, and the propeller dynamometer is driven to do lifting motion by moving the adjusting mechanism. The inclination angle adjusting mechanism is connected with the base, and the inclination angle adjusting mechanism stretches out and draws back to drive the base to rotate around the connecting piece so that the propeller dynamometer can do trim motion. Vertical lifting of the propeller dynamometer is achieved through the lifting piece, and the base is driven through the inclination angle adjusting mechanism to enable the propeller dynamometer to incline around the hinged shaft in the vertical plane. The structure is suitable for high-speed rotation of the propeller dynamometer, vertical lifting and inclination angle adjustment of the propeller shaft are accurately achieved, and the structure has the advantages of being high in automation degree, easy to operate, easy to maintain and the like.

Description

Technical Field

[0001] The invention belongs to the field of hydrodynamic performance detection, and in particular relates to a lifting and trimming device for a propeller dynamometer for open water experiments. Background Art

[0002] The propeller's sinking depth and oblique flow conditions will affect the propeller's hydrodynamic performance. In recent years, the accuracy of the numerical prediction of propeller hydrodynamic performance has been continuously improved, but theoretical calculations cannot completely replace propeller model tests. As a key equipment for open water tests, the propeller dynamometer must have the function of adjusting the propeller shaft's lifting and tilting movements to help experimenters better complete the test work. Summary of the invention

[0003] The technical purpose of the present invention is to provide a lifting and trimming device for a propeller dynamometer for open water experiments, so as to accurately achieve vertical lifting and tilting of the propeller shaft.

[0004] To solve the above problems, the technical solution of the present invention is: A lifting and trimming device for an open water experimental propeller dynamometer, comprising: The bridge measuring tracks are two parallel tracks; A towing frame is slidably connected to the measuring bridge track and can move along the setting direction of the measuring bridge track; a base configured to be coupled to a propeller dynamometer; A lifting and adjusting mechanism, the lifting and adjusting mechanism is fixedly connected to the towing frame and moves with the towing frame. The lifting and adjusting mechanism is provided with a lifting member that can move in a vertical direction. The lifting member is provided with a connecting member. The base is sleeved on the connecting member and is configured to drive the propeller power instrument to perform lifting and lowering motion by moving the lifting member. The inclination adjustment mechanism has two ends connected to the lifting member and the base respectively to form a first connection point and a second connection point. The mechanism is configured to keep the position of the first connection point unchanged, and adjust the position of the second connection point by changing the length of the inclination adjustment mechanism, thereby driving the base to rotate around the connecting member to realize the longitudinal tilt movement of the propeller dynamometer.

[0005] Specifically, The measuring bridge track comprises a pair of parallel I-beams, on which the first guide rail and the second guide rail are respectively provided, the first guide rail is a V-shaped rail, and the second guide rail is a flat rail; The towing frame is a square frame structure surrounded by at least four rods, wherein a V-shaped guide block and a flat guide block are installed under two rods arranged in the moving direction of the measuring bridge track, and are slidably connected to the first guide rail and the second guide rail of the measuring bridge track respectively; A set of U-shaped clamping rings are provided at both ends of two rods arranged in the moving direction of the measuring bridge track, and the U-shaped clamping rings connect the measuring bridge track with the towing frame; Eye screws are fixed to the four corners of the towing frame for hoisting the towing frame.

[0006] The lifting and lowering adjustment mechanism includes: The lifting frame is welded from steel sections into a square frame; Two sets of linear guide rail modules are arranged inside the lifting frame and parallel to the vertical direction, and the two ends thereof are respectively connected to the inner top and the inner bottom of the lifting frame. Each linear guide rail module includes a vertical guide rail and a slider arranged on the guide rail. The screw nut set is arranged at the center of the two sets of linear guide rail modules and is parallel to the vertical direction, and its two ends are respectively connected to the inner top and inner bottom of the lifting frame; A lifting motor and a reducer, the output shaft of the lifting motor is connected to the reducer in a transmission manner, both of which are arranged above the lifting frame, and the output shaft of the reducer passes through the top of the lifting frame and is connected to one end of the screw nut set in a transmission manner; The lifting member is a plate-shaped structure, the first plate surface of the lifting member is fixedly connected to the nut of the screw nut set, and the first plate surface is also connected to the slider of the linear guide module; The connecting member is a hinge shaft, the hinge shaft is connected to the second plate surface of the lifting member, and the second plate surface is opposite to the first plate surface; The support rod and the connecting frame, the two ends of the support rod are respectively connected to the lower edges of the lifting frame and the towing frame, and are arranged obliquely; the connecting frame is respectively connected to the upper edges of the lifting frame and the towing frame, and the support rod and the connecting frame are both configured to connect the lifting adjustment mechanism with the towing frame.

[0007] Specifically, the screw rod and nut set includes an upper bearing seat, a screw rod, a nut and a lower bearing seat; The two ends of the screw rod respectively penetrate the upper bearing seat and the lower bearing seat. The upper bearing seat is located at the top of the lifting frame. The screw rod is connected to the output shaft of the reducer through the upper bearing seat. The lower bearing seat is installed on the inner bottom of the lifting frame. The screw rod is connected to the bottom plate of the lifting frame through the lower bearing seat. The nut is sleeved on the screw rod and is located between the upper bearing seat and the lower bearing seat. The screw rod rotates under the drive of the reducer, thereby enabling the nut to move in the vertical direction. Among them, the screw nut set can choose a ball screw nut pair or a trapezoidal screw nut pair.

[0008] Specifically, The support rod comprises a first ear seat, a second ear seat, a double-headed screw, a left ear joint bearing and a right ear joint bearing; The first ear seat is arranged on the outer side of the lifting frame, and a pin is arranged to pass through the left ear joint bearing and the first ear seat in sequence to achieve connection; the second ear seat is arranged on the lower edge of the towing frame and is located on a rod perpendicular to the moving direction of the towing frame, and a pin is arranged to pass through the right ear joint bearing and the second ear seat in sequence to achieve connection; both ends of the double-headed screw are respectively threadedly connected with the left ear joint bearing and the right ear joint bearing; The connecting frame is in a right-angle shape, the bottom surface of the connecting frame is connected to the rod member of the towing frame by bolts, and the right-angle surface of the connecting frame is connected to the lifting frame by bolts.

[0009] More preferably, A clamp block is also provided, which is mounted on the first plate surface of the lifting member and is configured to lock the relative movement of the slider and the guide rail in the linear guide rail module to eliminate the influence of the internal contact gap of the lifting mechanism on the operation of the propeller dynamometer; There is also an indication assembly, including a scale provided on the side of the lifting frame, and a pointer provided on the lifting member, configured to obtain the vertical position of the propeller dynamometer through the position of the scale indicated by the pointer; A positioning block is also provided, which is arranged at the bottom of the lifting frame and is located on the moving path of the lifting member, and is configured to achieve mechanical limitation on the movement of the lifting member.

[0010] Wherein, when the tilt angle adjustment mechanism is manually adjusted, the tilt angle adjustment mechanism includes an upper pin shaft, a lower pin shaft, a left-hand screw, a right-hand screw and a double-headed nut sleeve; The upper pin shaft is fixedly connected to the lifting member, one end of the left-hand screw is connected to the upper pin shaft and axially positioned using a locking nut; the lower pin shaft is fixedly connected to the base, one end of the right-hand screw is connected to the lower pin shaft and axially positioned using a locking nut; the other end of the left-hand screw and the other end of the right-hand screw are respectively threadedly connected to the double-headed nut sleeves.

[0011] Wherein, when the inclination angle adjustment mechanism adopts electric control adjustment, the inclination angle adjustment mechanism includes an upper pin shaft, a lower pin shaft and an electric push rod; The upper pin shaft is fixedly connected to the lifting member and is also connected to the fixed end of the electric push rod; the lower pin shaft is fixedly connected to the base and is also connected to the output end of the electric push rod.

[0012] Further preferably, an inclination sensor is also provided in the base, which is configured to obtain the propeller shaft inclination angle of the propeller dynamometer.

[0013] Further preferably, an arc-shaped inclination limiting groove is provided on the end surface where the base is connected to the lifting member, and is configured to cooperate with the cylindrical pin on the lifting plate to limit the rotation angle of the base.

[0014] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: The present invention is designed with a lifting adjustment mechanism and an inclination adjustment mechanism. The propeller dynamometer is connected to the right side of the base. The inner hole in the middle of the base is fixed to the lifting member of the lifting adjustment mechanism through a hinge shaft. The left side of the base is fixed to the lifting member through the inclination adjustment mechanism. The vertical lifting of the propeller dynamometer is realized by the lifting member. The inclination adjustment mechanism drives the base to tilt the propeller dynamometer around the hinge shaft in a vertical plane. This structure is suitable for high-speed operation of the propeller dynamometer, accurately realizes vertical lifting and inclination adjustment of the propeller shaft, and has the characteristics of high degree of automation, simple operation, and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0016] Figure 1 It is a structural schematic diagram of a lifting and trimming device for an open water test propeller dynamometer of the present invention; Figure 2 It is a side schematic diagram of a lifting and trimming device for a propeller dynamometer for open water experiments of the present invention; Figure 3 It is a structural schematic diagram of the bridge measuring track of the present invention; Figure 4 It is a schematic structural diagram of the towing frame of the present invention; Figure 5 It is a structural schematic diagram of the lifting and lowering adjustment mechanism of the present invention; Figure 6 It is a structural schematic diagram of the screw rod and nut set of the present invention; Figure 7 It is a structural schematic diagram of the support rod of the present invention; Figure 8 It is a structural schematic diagram of the tilt angle adjustment mechanism of the present invention; Fig. 9 It is a structural schematic diagram of a tilt adjustment mechanism according to another embodiment of the present invention; Fig.10 It is a schematic diagram of the connection between the propeller power instrument of the present invention and the base; Fig.11 It is a schematic diagram of the connection between the hinge shaft and the base of the present invention; Fig.12 It is a schematic diagram of the inclination limiting groove of the present invention.

[0017] Description of Reference Numerals 1: measuring bridge track; 11: track; 12: first guide rail; 13: second guide rail; 2: towing frame; 21: U-shaped clip; 22: lifting eye screw; 23: V-shaped guide block; 24: flat guide block; 3: base; 31: bearing Ⅰ; 32: bearing Ⅱ; 33: inclination sensor; 34: baffle; 35: inclination limit groove; 4: lifting adjustment mechanism; 41: lifting frame; 411: scale; 412: pointer; 413: positioning block; 42: linear guide module; 43: screw rod and nut set; 431: upper bearing seat; 432: screw rod; 433: nut; 434: lower bearing seat; 44: lifting motor; 45: reducer; 46: lifting part; 461: pin hole; 462: friction plate; 463: cylindrical pin; 47: support rod; 471: first ear seat; 472: second ear seat; 473: double-headed screw; 474: left ear joint bearing; 475: right ear joint bearing; 48: connecting frame; 481: flat key; 49: clamp block; 5: tilt adjustment mechanism; 51: upper pin shaft; 52: lower pin shaft; 53: left-hand screw rod; 54: right-hand screw rod; 55: double-headed nut sleeve; 56: electric push rod; 6: guide sword; 7: coupling; 8: hinge shaft; 9: propeller dynamometer. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0019] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0020] The following is a further detailed description of a lifting and trimming device for an open water test propeller dynamometer proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0021] See also Figure 1 and Figure 2The present embodiment provides a lifting and trimming device for a propeller dynamometer for an open water experiment, which mainly includes the following parts, namely, a measuring bridge track 1, a towing frame 2, a base 3, a lifting and trimming mechanism 4, and an inclination adjustment mechanism 5. The measuring bridge track 1 is two parallel tracks. The towing frame 2 is slidably connected to the measuring bridge track 1 and can move along the setting direction of the measuring bridge track 1. The base 3 is used to carry the propeller dynamometer 9 required for the experiment. The lifting and trimming mechanism 4 is fixedly connected to the towing frame 2 and moves with the towing frame 2. The lifting and trimming mechanism 4 is provided with a lifting member 46 that can move in a vertical direction, and a connecting member is provided on the lifting member 46. The base 3 is sleeved on the connecting member, and the propeller dynamometer 9 can be driven to perform lifting and trimming movements by moving the lifting member 46. The two ends of the inclination adjustment mechanism 5 are respectively connected to the lifting member 46 and the base 3 to form a first connection point and a second connection point. The mechanism is configured to keep the position of the first connection point unchanged, and adjust the position of the second connection point by changing the length of the inclination adjustment mechanism 5, thereby driving the base 3 to rotate around the connection member to realize the longitudinal tilt movement of the propeller dynamometer 9.

[0022] Generally, the central measuring bridge of the towing tank trailer system is equipped with two precision rails, on which a base 3 is provided for installing the tooling and towing frame 2 required for the test. The propeller dynamometer 9 is connected to the central measuring bridge of the trailer through the towing frame 2, and the trailer is moved to implement the open water test of the propeller dynamometer 9. Figure 3 The measuring bridge track 1 in this embodiment includes a pair of parallel I-beams, and two guide rails are respectively arranged above the two I-beams, which can be named as the first guide rail 12 and the second guide rail 13. The first guide rail 12 adopts a V-shaped rail, and the second guide rail 13 adopts a flat rail.

[0023] See also Figure 4 A towing frame 2 is arranged on the measuring bridge track 1. The towing frame 2 is a square frame structure surrounded by at least four rods ( Figure 4 5 are used in the embodiment). V-shaped guide blocks 23 and flat guide blocks 24 are installed under the two rods arranged in the moving direction of the measuring bridge track 1, that is, the V-shaped guide blocks 23 cooperate with the first guide rail 12 to achieve sliding connection, and the flat guide blocks 24 cooperate with the second guide rail 13 to achieve sliding connection. In addition, a total of four sets of U-shaped clamps 21 are provided to fix the towing frame 2 with the track of the central measuring bridge, that is, the U-shaped clamps 21 are arranged at both ends of the two rods arranged in the moving direction of the measuring bridge track 1. In addition, eyebolts 22 are fixed at the four corners of the towing frame 2 to facilitate lifting.

[0024] See also Figure 5In this embodiment, the lifting and adjusting mechanism 4 specifically includes: a lifting frame 41, a linear guide rail module 42, a screw nut set 43, a lifting motor 44 and a reducer 45. The lifting frame 41 is the main body of the lifting and adjusting mechanism 4, and is welded into a square frame by steel sections. There are two sets of linear guide rail modules 42, both of which are arranged inside the lifting frame 41 and parallel to the vertical direction. The two ends are respectively connected to the inner top and the inner bottom of the lifting frame 41. Each linear guide rail module 42 includes a vertical guide rail and a slider arranged on the guide rail. The screw nut set 43 is arranged at the center of the two sets of linear guide rail modules 42 and parallel to the vertical direction. The two ends are respectively connected to the inner top and the inner bottom of the lifting frame 41. The lifting motor 44 and the reducer 45, the output shaft of the lifting motor 44 is connected to the reducer 45 in transmission connection, both of which are arranged above the lifting frame 41, and the output shaft of the reducer 45 passes through the top of the lifting frame 41 and is connected to one end of the screw nut set 43 in transmission connection. The lifting member 46 is a plate-like structure. The first plate surface of the lifting member 46 is fixedly connected to the nut 433 of the screw nut set 43. In addition, the first plate surface is also connected to the slider in the linear guide module 42. The connecting member is actually a hinge shaft 8, which is connected to the second plate surface of the lifting member 46. The second plate surface is the opposite side of the first plate surface. The support rod 47 and the connecting frame 48, the two ends of the support rod 47 are respectively connected to the lower edge of the lifting frame 41 and the towing frame 2, and are arranged obliquely; the connecting frame 48 is respectively connected to the upper edge of the lifting frame 41 and the towing frame 2. The support rod 47 and the connecting frame 48 are both used to connect the lifting adjustment mechanism 4 with the towing frame 2. The working principle of the elevator adjustment mechanism is: the lifting motor 44 drives the screw rod 432 to rotate through the reducer 45, so that the nut 433 on the screw rod 432 rotates spirally, and the nut 433 drives the lifting member 46 connected thereto to move in the vertical direction. Since the lifting member 46 is connected to the base 3 equipped with the propeller dynamometer 9, the lifting and lowering of the propeller dynamometer 9 can be indirectly realized.

[0025] See also Figure 6 The screw rod and nut set 43 includes an upper bearing seat 431, a screw rod 432, a nut 433 and a lower bearing seat 434. The nut 433 is screw-engaged with the screw rod 432 through a threaded engagement to realize a spiral transmission, and the nut 433 is also fixed to the lifting member 46. The two ends of the screw rod 432 penetrate the upper bearing seat 431 and the lower bearing seat 434 respectively. The upper bearing seat 431 is located at the upper part of the lifting frame 41. The screw rod 432 is connected to the output shaft of the reducer 45 through the upper bearing seat 431. The lower bearing seat 434 is installed on the inner bottom of the lifting frame 41, and the screw rod 432 is connected to the bottom plate of the lifting frame 41 through the lower bearing seat 434. The part of the bottom of the screw rod 432 that extends out of the lower bearing seat 434 is flattened and symmetrically cut to facilitate manual adjustment of the vertical position of the lifting member 46. Optionally, the screw rod and nut set 43 can use a ball screw nut pair or a trapezoidal screw nut pair, and both transmission pairs adopt a structure that eliminates the gap between the screw and the nut.

[0026] See also Figure 5 The connecting frame 48 connects the towing frame 2 and the lifting frame 41 at the same time, and is in a right-angle shape as a whole. The bottom surface of the connecting frame 48 is fastened with bolts of the rod of the towing frame 2, and the right-angle surface of the connecting frame 48 is bolted to the lifting frame 41. At the same time, the right-angle surface and the lifting frame 41 are positioned and supported using a flat key 481.

[0027] Next, see Figure 7 The two ends of the support rod 47 are respectively connected to the lifting frame 41 and the towing frame 2, and are arranged obliquely to constrain the freedom of the bottom of the lifting frame 41. Specifically, the support rod 47 includes a first ear seat 471, a second ear seat 472, a double-headed screw 473, a left ear joint bearing 474 and a right ear joint bearing 475. The first ear seat 471 is installed on the outer surface of the lifting frame 41, the pin shaft connects the left ear joint bearing 474 and the first ear seat 471, and the split pin is used to axially position the pin shaft. The second ear seat 472 is set at the lower edge of the towing frame 2 and is located on a rod member perpendicular to the moving direction of the towing frame 2. Similarly, the pin shaft connects the right ear joint bearing 475 and the second ear seat 472, and the split pin is used to axially position the pin shaft. The two ends of the double-headed screw 473 are respectively screwed into the internal threads of the left and right joint bearings. Rotating the double-headed screw 473 can adjust the center distance of the two ear seats, thereby tightening the connection between the lifting frame 41 and the towing frame 2. After adjusting the screwing depth of the double-headed screw rod 473 into the inner threads of the left and right joint bearings, two screws are used to tighten them respectively to further achieve a tightening connection.

[0028] Preferably, see Figure 5 This embodiment also has a clamp block 49, which is installed on the first plate surface of the lifting member 46 and is used to lock the relative movement of the slider and the guide rail in the linear guide module 42, thereby eliminating the influence of the internal contact gap of the lifting mechanism on the operation of the propeller dynamometer 9 as much as possible.

[0029] More preferably, see Figure 5 This embodiment is also provided with an indication component, which includes a scale 411 arranged on the side of the lifting frame 41 and a pointer 412 arranged on the lifting member 46. The vertical position of the propeller dynamometer 9 can be obtained by reading the position of the scale 411 pointed by the pointer 412.

[0030] Preferably, see Figure 5 A positioning block 413 is also provided at the bottom of the lifting frame 41 and is located on the moving path of the lifting member 46 to achieve mechanical limitation on the movement of the lifting member 46 .

[0031] See also Figure 5 , Figure 8 and Fig. 9In this embodiment, one end of the inclination adjustment mechanism 5 is connected to the pin hole 461 on the upper left of the lifting member 46, and the other end is connected to the left side of the base 3. The extension and retraction of the inclination adjustment mechanism 5 realizes the longitudinal tilt movement of the propeller dynamometer 9. Specifically, the inclination adjustment mechanism 5 here can be manually adjusted ( Figure 8 ) or electric adjustment ( Fig. 9 ). When the inclination adjustment mechanism 5 is manually adjusted, the inclination adjustment mechanism 5 includes an upper pin shaft 51, a lower pin shaft 52, a left-hand screw rod 53, a right-hand screw rod 54 and a double-headed nut sleeve 55. The upper pin shaft 51 is fixedly connected to the pin hole 461 on the upper left of the lifting member 46, and one end of the left-hand screw rod 53 is hinged to the upper pin shaft 51 through the internal joint bearing spherical surface, and is axially positioned using the locking nut 433. The lower pin shaft 52 is connected to the left side of the base 3, and one end of the right-hand screw rod 54 is hinged to the lower pin shaft 52 through the internal joint bearing spherical surface, and is axially positioned using the locking nut 433. The other end of the left-hand screw rod 53 and the other end of the right-hand screw rod 54 are respectively screwed into the double-headed nut sleeve 55, and are threadedly connected to the double-headed nut sleeve 55. By rotating the double-headed nut sleeve 55, the base 3 is driven to rotate around the hinge shaft 8 to achieve the longitudinal tilt movement of the base 3.

[0032] When the tilt adjustment mechanism 5 adopts electric control adjustment, the tilt adjustment mechanism 5 includes an upper pin shaft, a lower pin shaft and an electric push rod 56, that is, the tilt angle is adjusted electrically, and the electric push rod 56 replaces the double-headed nut sleeve and the left-right screw rod, and the rest of the structure is similar to the manual adjustment mechanism. Specifically, the upper pin shaft is fixedly connected to the lifting member and is also connected to the fixed end of the electric push rod 56; the lower pin shaft is fixedly connected to the base and is also connected to the output end of the electric push rod 56.

[0033] See also Figures 10 to 12 In this embodiment, the base 3 is arranged as follows: the large plane at one end of the hinge shaft 8 is fixed to the lifting member 46, and the other end is axially positioned by the baffle 34, the plane bearing and the nut 433. At the same time, the bearing I 31 and the bearing II 32 radially support the base 3. Preferably, an inclination sensor 33 is also arranged on the upper edge of the base 3 to obtain the propeller shaft inclination angle of the propeller dynamometer 9 in real time, so as to facilitate the adjustment and control of the propeller shaft inclination angle of the propeller dynamometer 9. Preferably, an arc-shaped inclination limit groove 35 is also provided on the end surface where the base 3 is connected to the lifting member 46, which is used to cooperate with the cylindrical pin 463 on the lifting member 46 to limit the rotation angle of the base 3. At the same time, two copper friction plates 462 are fixed to the lifting member 46 to reduce the friction resistance when the base 3 is tilted. For further reference, see Fig.10 and Fig.11 The driving motor of the propeller dynamometer 9 is connected to the guide sword 6 through a coupling 7, and the coupling 7 is placed inside the base 3. The driving motor is fixedly connected to the upper edge of the right side of the base 3, and the guide sword 6 of the propeller dynamometer 9 is fixedly connected to the lower edge of the right side of the base 3.

[0034] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A lifting and trimming device for an open water test propeller dynamometer, characterized in that: include: The bridge measuring tracks are two parallel tracks; A towing frame, which is slidably connected to the measuring bridge track and can move along the setting direction of the measuring bridge track; a base configured to connect to the propeller dynamometer; A lifting and lowering adjustment mechanism, wherein the lifting and lowering adjustment mechanism is fixedly connected to the towing frame and moves with the towing frame. The lifting and lowering adjustment mechanism is provided with a lifting member that can move in a vertical direction, and a connecting member is provided on the lifting member. The base is sleeved on the connecting member and is configured to drive the propeller power instrument to perform lifting and lowering motion by moving the lifting member. An inclination adjustment mechanism, wherein both ends of the inclination adjustment mechanism are respectively connected to the lifting member and the base to form a first connection point and a second connection point, and is configured to keep the position of the first connection point unchanged, and adjust the position of the second connection point by changing the length of the inclination adjustment mechanism, thereby driving the base to rotate around the connecting member to realize the longitudinal tilt movement of the propeller dynamometer.

2. The lifting and trimming device for the propeller dynamometer for open water experiments according to claim 1 is characterized in that: The measuring bridge track comprises a pair of parallel I-beams, on which the two I-beams are respectively provided a first guide rail and a second guide rail, wherein the first guide rail is a V-shaped rail and the second guide rail is a flat rail; The towing frame is a square frame structure surrounded by at least four rods, wherein a V-shaped guide block and a flat guide block are installed below two rods arranged in the moving direction of the measuring bridge track, and are slidably connected to the first guide rail and the second guide rail of the measuring bridge track respectively; A set of U-shaped clamping rings are provided at both ends of two rods arranged in the moving direction of the measuring bridge track, and the U-shaped clamping rings connect the measuring bridge track with the towing frame; Eye screws are fixed to the four corners of the towing frame for hoisting the towing frame.

3. The lifting and trimming device for the propeller dynamometer for open water experiments according to claim 1 is characterized in that: The lifting and adjusting mechanism comprises: The lifting frame is welded from steel sections into a square frame; Two sets of linear guide rail modules are both arranged inside the lifting frame and parallel to the vertical direction, and the two ends thereof are respectively connected to the inner top and the inner bottom of the lifting frame, and each of the linear guide rail modules includes a guide rail in the vertical direction and a slider arranged on the guide rail; The screw nut set is arranged at the center of the two sets of linear guide rail modules and is parallel to the vertical direction, and its two ends are respectively connected to the inner top and the inner bottom of the lifting frame; A lifting motor and a reducer, wherein the output shaft of the lifting motor is in transmission connection with the reducer, and both are arranged above the lifting frame, and the output shaft of the reducer passes through the top of the lifting frame and is in transmission connection with one end of the screw nut set; The lifting member is a plate-shaped structure, the first plate surface of the lifting member is fixedly connected to the nut of the screw nut set, and the first plate surface is also connected to the slider of the linear guide module; The connecting member is a hinge shaft, and the hinge shaft is connected to the second plate surface of the lifting member, and the second plate surface is opposite to the first plate surface; A support rod and a connecting frame, wherein both ends of the support rod are respectively connected to the lower edges of the lifting frame and the towing frame, and are arranged obliquely; the connecting frame is respectively connected to the upper edges of the lifting frame and the towing frame, and the support rod and the connecting frame are both configured to connect the lifting adjustment mechanism to the towing frame.

4. The lifting and trimming device for the propeller dynamometer for open water experiments according to claim 3 is characterized in that: The screw rod and nut set comprises an upper bearing seat, a screw rod, the nut and a lower bearing seat; The two ends of the screw rod respectively penetrate the upper bearing seat and the lower bearing seat, the upper bearing seat is located at the upper part of the lifting frame, the screw rod is connected to the output shaft of the reducer through the upper bearing seat, the lower bearing seat is installed on the inner bottom of the lifting frame, and the screw rod is connected to the bottom plate of the lifting frame through the lower bearing seat; the nut is sleeved on the screw rod and is located between the upper bearing seat and the lower bearing seat; the screw rod rotates under the drive of the reducer, so that the nut can move in the vertical direction; The screw nut set may be a ball screw nut pair or a trapezoidal screw nut pair.

5. The lifting and trimming device for the propeller dynamometer for open water experiments according to claim 3 is characterized in that: The support rod comprises a first ear seat, a second ear seat, a double-headed screw, a left ear joint bearing and a right ear joint bearing; The first ear seat is arranged on the outer side of the lifting frame, and a pin is arranged to pass through the left ear joint bearing and the first ear seat in sequence to achieve connection; the second ear seat is arranged on the lower edge of the towing frame and is located on a rod perpendicular to the moving direction of the towing frame, and a pin is arranged to pass through the right ear joint bearing and the second ear seat in sequence to achieve connection; both ends of the double-headed screw are respectively threadedly connected with the left ear joint bearing and the right ear joint bearing; The connecting frame is in a right-angle shape, the bottom surface of the connecting frame is bolted to the rod of the towing frame, and the right-angle surface of the connecting frame is bolted to the lifting frame.

6. The lifting and trimming device for the propeller dynamometer for open water experiments according to claim 3 is characterized in that: A clamp block is also provided, which is mounted on the first plate surface of the lifting member and is configured to lock the relative movement of the slider and the guide rail in the linear guide rail module to eliminate the influence of the internal contact gap of the lifting mechanism on the operation of the propeller dynamometer; There is also an indication assembly, including a scale provided on the side of the lifting frame, and a pointer provided on the lifting member, configured to obtain the vertical position of the propeller dynamometer through the position of the scale indicated by the pointer; A positioning block is also provided, which is arranged at the bottom of the lifting frame and is located on the moving path of the lifting member, and is configured to achieve mechanical limitation on the movement of the lifting member.

7. The lifting and trimming device for the propeller dynamometer for open water experiments according to claim 1 is characterized in that: When the tilt adjustment mechanism is manually adjusted, the tilt adjustment mechanism comprises an upper pin shaft, a lower pin shaft, a left-hand screw, a right-hand screw and a double-headed nut sleeve; The upper pin shaft is fixedly connected to the lifting member, one end of the left-hand screw is connected to the upper pin shaft and is axially positioned using a locking nut; the lower pin shaft is fixedly connected to the base, one end of the right-hand screw is connected to the lower pin shaft and is axially positioned using a locking nut; the other end of the left-hand screw and the other end of the right-hand screw are respectively threadedly connected to the double-headed nut sleeve.

8. The lifting and trimming device for the propeller dynamometer for open water experiments according to claim 1 is characterized in that: When the tilt angle adjustment mechanism adopts electric control adjustment, the tilt angle adjustment mechanism includes an upper pin shaft, a lower pin shaft and an electric push rod; The upper pin shaft is fixedly connected to the lifting member and is also connected to the fixed end of the electric push rod; the lower pin shaft is fixedly connected to the base and is also connected to the output end of the electric push rod.

9. The lifting and trimming device for an open water test propeller dynamometer according to claim 7 or 8, characterized in that: The base is also provided with an inclination sensor configured to obtain the propeller shaft inclination angle of the propeller dynamometer.

10. The lifting and trimming device for the propeller dynamometer for open water experiments according to claim 9, characterized in that: An arc-shaped inclination limiting groove is also provided on the end surface of the base connected to the lifting member, which is configured to cooperate with the cylindrical pin on the lifting plate to limit the rotation angle of the base.

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