Large continuous wind tunnel follow-up turning gear and method

Abstract

The invention discloses a large continuous wind tunnel follow-up turning gear and method, belongs to the technical field of wind tunnel operation and maintenance, and aims to solve the problem that meshing between a continuous wind tunnel and a turning gear fails due to thermal expansion and cold contraction of a driving shaft system. The device comprises a barring shaft sleeve and a barring action device, the barring shaft sleeve slides on the barring rotating shaft, a barring shell is arranged outside the barring shaft sleeve, a barring action device and a laser displacement meter are arranged on the barring shell, an annular positioning groove is formed in the periphery of the barring shaft sleeve, the barring action device comprises a swinging lower connecting shaft, one end of the lower connecting shaft stretches into the annular positioning groove to drive the barring shaft sleeve to slide, and the other end of the lower connecting shaft stretches into the laser displacement meter. The laser displacement meter collects the relative position of the barring shaft sleeve and the driven shaft head, the barring controller obtains data collected by the laser displacement meter, and the lower connecting shaft moves along with the relative position of the barring shaft sleeve and the driven shaft head, so that the barring shaft sleeve and the driven shaft head are always kept meshed during barring, and the risk of meshing failure of barring parts is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of wind tunnel operation and maintenance, and in particular relates to a large-scale continuous wind tunnel follow-up turning device and method. Background Art

[0002] Wind tunnel testing is a commonly used method in the field of aerodynamics research, providing strong support and guarantee for the development of aviation and aerospace. As a type of wind tunnel, large continuous wind tunnels mainly use fans or compressors as driving air sources to form target pressure and wind speed in the flow channel, thereby obtaining effective aerodynamic data. Since the shaft system of a large wind tunnel drive system is generally long, in order to prevent the deformation of the long shaft structure, the low-speed cranking method is generally used to solve this problem, especially before the unit is started (cold state) and after a long period of operation (hot state). If the unit is not running for a long time, it is also necessary to crank it every once in a while. When the unit is shut down in a hot state, its shaft system will be longer than in a cold state due to thermal expansion. In this case, cranking will cause wear of the positioning components in the cranking device, and during the cranking process, the shaft system of the unit will gradually shrink in length due to the transition from hot to cold state, which may cause the separation failure of the cranking device and the shaft system. In view of the above problems, there is an urgent need for a device that can perform follow-up turning according to the position of the end of the driven shaft to meet the operation and maintenance requirements of large-scale continuous wind tunnels. Summary of the invention

[0003] The purpose of the present invention is to provide a large-scale continuous wind tunnel follow-up turning device and method to solve the problem that the existing large-scale continuous wind tunnel fails to engage with the turning device due to thermal expansion and contraction of the drive shaft system. The technical solution adopted by the present invention is as follows: A large-scale continuous wind tunnel follow-up winching device comprises a winching base, a winching motor, a reducer, a winching shaft, a winching shaft sleeve and a winching action device. The winching motor and the reducer are fixed on the winching base, the output end of the winching motor is connected with the high-speed end of the reducer, and the low-speed end of the reducer is connected with the winching shaft. A spline structure is provided on the outer periphery of the winching shaft, and the winching shaft sleeve is sleeved on the winching shaft. A spline structure is provided on the inner hole of the winching shaft sleeve. The winching shaft and the winching shaft sleeve are axially slidably matched through the spline structure and circumferentially limited matched. The winching shaft sleeve is coaxially arranged on the rear side of the driven shaft head, and the end faces of the winching shaft sleeve and the driven shaft head opposite to each other are provided with end face tooth structures that mesh or separate. The outer cover of the winching motor, the reducer and the winching shaft is provided with a winching housing, and a flange opening is provided at the front end of the winching housing for the driven shaft head to extend into, and the flange opening is sealed and connected to the housing of the driven shaft head, so that a closed space is formed in the winching housing, and the outer cover of the winching motor, the reducer and the winching shaft A turning device, a laser displacement meter and a turning controller are provided on the shell. An annular positioning groove is processed on the outer periphery of the turning sleeve. The cross-section of the annular positioning groove is rectangular. The turning device includes an electric cylinder, a transmission mechanism and a lower connecting shaft. The piston rod of the electric cylinder is connected to the power input end of the transmission mechanism, and the lower connecting shaft is connected to the power output end of the transmission mechanism. The end of the lower connecting shaft close to the turning sleeve is inserted into the annular positioning groove. The electric cylinder drives the lower connecting shaft to swing back and forth through the transmission mechanism. A position reference shoulder is processed on the driven shaft head. The end face of the annular positioning groove close to the driven shaft head is defined as the first reference plane, and the end face of the position reference shoulder close to the turning sleeve is defined as the second reference plane. The laser displacement meter collects position data of the first reference plane and the second reference plane. The laser displacement meter and the electric cylinder are electrically connected to the turning controller respectively. The turning controller obtains the data collected by the laser displacement meter and controls the extension and retraction of the piston rod of the electric cylinder.

[0004] The camshaft is an axially coupled machine which is adapted to engage the first and second gears of the drive mechanism and to engage with the first and second gears of the drive mechanism. The right end of the first upper connecting rod is penetrated by an upper connecting shaft, the left end of the second upper connecting rod is provided with an oblong hole along the length direction, the upper end of the upper connecting shaft is slidably matched with the oblong hole of the second upper connecting rod, the upper connecting shaft and the lower connecting shaft are axially aligned up and down, the left end of the first upper connecting rod is provided with a first spring seat, the right end of the second upper connecting rod is provided with a second spring seat, the first spring seat and the second spring seat are connected by a tension spring, the swing rod is the transmission input end of the transmission mechanism, the rear end of the swing rod is connected to the first upper connecting rod, and the front end of the swing rod is provided with an oblong hole along the length direction An oblong hole is opened in the degree direction, the rocker arm is perpendicular to the first upper connecting rod, the first synchronous shaft is on the length extension line of the rocker arm, an electric cylinder is arranged on the front side of the seat plate, the piston rod of the electric cylinder is arranged to the left, a swing pin is passed through the piston rod of the electric cylinder, the swing pin is slidably matched with the oblong hole of the rocker arm, when the piston rod of the electric cylinder is extended, the lower connecting shaft swings forward, the turning shaft sleeve and the driven shaft head are meshed through the end face tooth structure, when the piston rod of the electric cylinder is retracted, the lower connecting shaft swings backward, and the turning shaft sleeve and the driven shaft head are separated.

[0005] Furthermore, the groove width D1 of the annular positioning groove is greater than the diameter D2 of the lower connecting shaft, and the axial length of the spline structure of the turning shaft sleeve is greater than the maximum axial stroke of the lower connecting shaft.

[0006] Furthermore, the tooth shape of the end face tooth structure is a ratchet tooth shape.

[0007] Furthermore, the axial center distance between the first synchronous shaft and the swing pin shaft is set to c1, and the axial center distance between the upper connecting shaft and the first synchronous shaft is set to c2. Then, the axial movement distance d2 of the lower connecting shaft along the turning shaft sleeve satisfies the following formula: d1 / c1=d2 / c2; Among them, d1 is the extension and contraction change of the electric cylinder piston rod.

[0008] Furthermore, the distance that the turning shaft sleeve needs to slide forward from the initial state of separation from the driven shaft head to the state of complete engagement with the driven shaft head is defined as the first moving distance d3, and the first moving distance d3 satisfies the following formula: d3=b0-a1-a2+D1-D2; Among them, b0 is the initial distance between the first reference plane and the second reference plane, a1 is the distance from the first reference plane to the tooth tip of the end face tooth of the turning shaft sleeve, and a2 is the distance from the second reference plane to the tooth root of the end face tooth structure of the driven shaft head.

[0009] The present invention also provides a large-scale continuous wind tunnel follow-up turning method, which is implemented based on the above-mentioned large-scale continuous wind tunnel follow-up turning device, and includes the following steps: Step 1: First, the turning controller obtains the data collected by the laser displacement meter and calculates the distance between the first reference plane and the second reference plane. The turning controller calculates the first moving distance d3 of the turning shaft sleeve through the formula. Then, the turning controller calculates the extension amount d1 of the electric cylinder when d3=d2. Step 2: Start the turning motor to make the turning shaft sleeve rotate at a speed of 1 rpm; Step 3: The turning controller controls the piston rod of the electric cylinder to extend a length of d1, and the transmission mechanism drives the upper connecting shaft and the lower connecting shaft to move forward an axial distance of d2, so that the turning shaft sleeve and the end face tooth structure of the driven shaft head are fully engaged, and the distance between the first reference plane and the second reference plane is marked as b1, and the turning shaft sleeve drives the driven shaft head to rotate together at a speed of 1rpm; Step 4: The turning controller drives the lower connecting shaft to move backward by an axial distance of (D1-D2) / 2 through the electric cylinder, so that the center line of the lower connecting shaft coincides with the center line of the groove width of the annular positioning groove; Step 5: When the driven shaft head is in a cold state, the turning shaft sleeve is kept rotating at a speed of 1 rpm, and the laser displacement meter monitors the real-time distance b2 between the turning shaft sleeve and the driven shaft head at a fixed period; When the driven shaft head is in a hot state, a threshold value k is set. If (b2-b1) is less than k, the turning gear sleeve maintains the current axial position. If (b2-b1) reaches k, the turning gear controller drives the lower connecting shaft to move forward first by an axial distance of k+(D1-D2) / 2 through the electric cylinder, and then moves forward by an axial distance of (D1-D2) / 2. Step 6: When it is necessary to stop the turning, turn off the turning motor, wait until the turning sleeve and the driven shaft head are completely still, control the piston rod of the electric cylinder to retract, and separate the turning sleeve and the driven shaft head.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The present invention aims to solve the problem that during the operation and maintenance of a large continuous wind tunnel, the drive shaft system of a fan or compressor changes in length due to thermal expansion and contraction, resulting in failure of the engagement between the winch device and the drive shaft system. The present invention proposes a follow-up winch device for a large continuous wind tunnel. The relative position of the winch sleeve and the driven shaft head is collected by a laser displacement meter, and the winch controller controls the extension and retraction of the piston rod of the electric cylinder according to the relative position of the winch sleeve and the driven shaft head. During the winch process, if the relative position of the winch sleeve and the driven shaft head changes, the winch controller drives the lower connecting shaft to swing through the electric cylinder, thereby causing the winch sleeve to slide axially, so that the winch sleeve and the driven shaft head always remain engaged. The present invention follows the length change of the fan or compressor shaft system of the large continuous wind tunnel due to thermal expansion and contraction, thereby avoiding the risk of engagement failure of the winch components and realizing safe and reliable winching of the large continuous wind tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a left side view of the device of the present invention; Figure 2 is a front view of the device of the present invention; Figure 3 It is a left-side schematic diagram of the coordination between the turning gear action device and the turning gear shaft sleeve; Figure 4 It is a top view of the turning gear action device; Figure 5 It is a schematic diagram of the working state of the turning action device; Figure 6 yes Figure 2 AA section view; Figure 7 It is a schematic diagram of the initial state of the separation of the turning shaft sleeve and the driven shaft head before the turning; Figure 8 It is a schematic diagram of the state when the turning shaft sleeve is meshed with the driven shaft head; Fig. 9 It is a state schematic diagram of step 4 of the method of the present invention; Fig.10 It is a state schematic diagram of step five of the method of the present invention.

[0012] In the figure, 1. turning motor, 11. turning base, 2. speed reducer, 3. turning housing, 4. turning shaft, 5. turning action device, 51. first spring seat, 52. tension spring, 53. first upper connecting rod, 54. upper connecting shaft, 55. second upper connecting rod, 56. second spring seat, 57. seat plate, 58. first synchronous shaft, 59. first lower connecting rod, 510. lower connecting shaft, 511. second lower connecting rod, 512. second synchronous shaft, 513. electric cylinder, 514. swing rod, 515. swing pin, 6. turning shaft sleeve, 61. annular positioning groove, 7. turning controller, 8. laser displacement meter, 81. first reference surface, 82. second reference surface, 9. driven shaft head, 91. position reference shoulder. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0014] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection is a non-detachable connection including but not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but not limited to conventional detachable methods such as bolt connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can be found in the existing connection methods to achieve the function, and those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and bolt connection is selected for detachable connection.

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings. The following embodiments are provided to explain the present invention, but the present invention is not limited to the following embodiments.

[0016] Embodiment 1: Figures 1 to 10As shown, a large-scale continuous wind tunnel follow-up turning device comprises a turning base 11, a turning motor 1, a reducer 2, a turning shaft 4, a turning shaft sleeve 6 and a turning action device 5. The turning motor 1 and the reducer 2 are fixed on the turning base 11, the output end of the turning motor 1 is connected to the high-speed end of the reducer 2, the low-speed end of the reducer 2 is connected to the turning shaft 4, the outer periphery of the turning shaft 4 is provided with a spline structure, the turning shaft sleeve 6 is sleeved on the turning shaft 4, the inner hole of the turning shaft sleeve 6 is provided with a spline structure, and the turning shaft 4 and the turning shaft sleeve 6 slide axially through the spline structure. The winch sleeve 6 is coaxially arranged on the rear side of the driven shaft head 9, and the driven shaft head 9 is the torque application end of the winch of the large continuous wind tunnel fan or compressor. The end faces on the opposite sides of the winch sleeve 6 and the driven shaft head 9 are provided with meshing or disengaging end face tooth structures. The outer cover of the winch motor 1, the reducer 2 and the winch shaft 4 is provided with a winch housing 3. The front end of the winch housing 3 is provided with a flange opening for the driven shaft head 9 to extend into. The flange opening is sealed and connected to the housing of the driven shaft head 9, so that a closed space is formed in the winch housing 3. The turning gear housing 3 is provided with a turning gear actuating device 5, a laser displacement meter 8 and a turning gear controller 7. The outer periphery of the turning gear sleeve 6 is processed with an annular positioning groove 61. The cross section of the annular positioning groove 61 is rectangular. The turning gear actuating device 5 includes an electric cylinder 513, a transmission mechanism and a lower connecting shaft 510. The piston rod of the electric cylinder 513 is connected to the power input end of the transmission mechanism. The lower connecting shaft 510 is connected to the power output end of the transmission mechanism. The end of the lower connecting shaft 510 close to the turning gear sleeve 6 is inserted into the annular positioning groove 61. The electric cylinder 513 is driven by the transmission mechanism. The movable lower connecting shaft 510 swings back and forth, and a position reference shoulder 91 is processed on the driven shaft head 9. The end face of the annular positioning groove 61 close to the driven shaft head 9 is defined as the first reference plane 81, and the end face of the position reference shoulder 91 close to the turning shaft sleeve 6 is defined as the second reference plane 82. The laser displacement meter 8 collects the position data of the first reference plane 81 and the second reference plane 82. The laser displacement meter 8 and the electric cylinder 513 are electrically connected to the turning controller 7 respectively. The turning controller 7 obtains the data collected by the laser displacement meter 8 and controls the extension and retraction of the piston rod of the electric cylinder 513.

[0017] The present invention aims to solve the problem that during the operation and maintenance of a large continuous wind tunnel, the drive shaft system of a fan or compressor expands and contracts due to thermal expansion and contraction, resulting in the failure of the engagement between the winch device and the drive shaft system. The present invention proposes a follow-up winch device for a large continuous wind tunnel, wherein the relative position of the winch sleeve 6 and the driven shaft head 9 is collected by a laser displacement meter 8, and the winch controller 7 controls the extension and retraction of the piston rod of the electric cylinder 513 according to the relative position of the winch sleeve 6 and the driven shaft head 9. During the winch process, if the relative position of the winch sleeve 6 and the driven shaft head 9 changes, the winch controller 7 drives the lower connecting shaft 510 to swing through the electric cylinder 513, thereby causing the winch sleeve 6 to slide axially, so that the winch sleeve 6 and the driven shaft head 9 always remain engaged. The present invention follows the length change of the fan or compressor shaft system of the large continuous wind tunnel due to thermal expansion and contraction, thereby avoiding the risk of engagement failure of the winch components and realizing safe and reliable winch of the large continuous wind tunnel.

[0018] The turning gear actuating device 5 also includes a seat plate 57. An inspection port is provided on the upper side of the turning gear housing 3. The seat plate 57 can be detachably closed to close the inspection port. The transmission mechanism includes an upper connecting shaft 54, a first upper connecting rod 53, a second upper connecting rod 55, a first lower connecting rod 59, and a second lower connecting rod 511. The first synchronous shaft 58 and the second synchronous shaft 512 are arranged on the seat plate 57 on the left and right. The first synchronous shaft 58 and the second synchronous shaft 512 are respectively rotatably sealed with the seat plate 57. The first synchronous shaft 58 and the second synchronous shaft 512 are respectively symmetrically arranged on both sides of the axis of the turning gear shaft sleeve 6. The middle part of the first upper connecting rod 53 is connected to the upper part of the first synchronous shaft 58. The middle part of the second upper connecting rod 55 is connected to the upper end of the second synchronization shaft 512, the left end of the first lower connecting rod 59 is connected to the lower end of the first synchronization shaft 58, the right end of the second lower connecting rod 511 is connected to the lower end of the second synchronization shaft 512, the left end of the second lower connecting rod 511 is the power output end of the transmission mechanism, the lower connecting shaft 510 is penetrated at the left end of the second lower connecting rod 511, the right end of the first lower connecting rod 59 is provided with an oblong hole along the length direction, the lower end of the lower connecting shaft 510 is inserted into the annular positioning groove 61, and the upper end of the lower connecting shaft 510 is slidably matched with the oblong hole of the first lower connecting rod 59, and the first upper connecting rod The right end of the first upper connecting rod 53 is penetrated by an upper connecting shaft 54, and the left end of the second upper connecting rod 55 is provided with an oblong hole along the length direction. The upper end of the upper connecting shaft 54 ​​is slidably matched with the oblong hole of the second upper connecting rod 55, and the upper connecting shaft 54 ​​and the lower connecting shaft 510 are aligned in the vertical direction. The left end of the first upper connecting rod 53 is provided with a first spring seat 51, and the right end of the second upper connecting rod 55 is provided with a second spring seat 56. The first spring seat 51 and the second spring seat 56 are connected by a tension spring 52. The swing rod 514 is the transmission input end of the transmission mechanism. The rear end of the swing rod 514 is connected to the first upper connecting rod 53, and the front end of the swing rod 514 is provided with an oblong hole along the length direction. The first synchronizing shaft 58 is on the length extension line of the rocker arm 514, and the front side of the seat plate 57 is provided with an electric cylinder 513, and the piston rod of the electric cylinder 513 is set to the left. A swing pin 515 is passed through the piston rod of the electric cylinder 513, and the swing pin 515 is slidably matched with the oblong hole of the rocker arm 514. When the piston rod of the electric cylinder 513 is extended, the lower connecting shaft 510 swings forward, and the turning shaft sleeve 6 and the driven shaft head 9 are meshed through the end face tooth structure. When the piston rod of the electric cylinder 513 is retracted, the lower connecting shaft 510 swings backward, and the turning shaft sleeve 6 and the driven shaft head 9 are separated.

[0019] In order to prevent foreign matter from entering the worn mechanical structure and prevent grease loss, a closed space needs to be formed in the turning gear housing 3. Since the volume of the closed space is limited, the electric cylinder 513 is arranged outside the turning gear housing 3. Such an arrangement is also more conducive to the repair and maintenance of the electric cylinder 513. The first upper connecting rod 53 and the first lower connecting rod 59 swing synchronously, the second upper connecting rod 55 and the second lower connecting rod 511 swing synchronously, and the upper connecting shaft 54 ​​and the lower connecting shaft 510 swing synchronously. A part of the transmission mechanism is arranged outside the turning gear housing 3, and the other part is arranged inside the turning gear housing 3. The part of the transmission mechanism arranged outside the turning gear housing 3 is not only a connecting component, which can provide stability of the connection, but also a reference component. The state of the transmission mechanism arranged inside the turning gear housing 3 can be known. While keeping the turning gear housing 3 in a sealed state, the power source electric cylinder 513 arranged outside the turning gear housing 3 drives the turning gear shaft sleeve 6 arranged inside the turning gear housing 3

[0020] The groove width D1 of the annular positioning groove 61 is greater than the diameter D2 of the lower connecting shaft 510, and the axial length of the spline structure of the turning shaft sleeve 6 is greater than the maximum axial stroke of the lower connecting shaft 510. After the axial position of the turning shaft sleeve 6 is adjusted, the lower connecting shaft 510 can be separated from the annular positioning groove 61 to prevent the lower connecting shaft 510 from being worn.

[0021] The tooth shape of the end face tooth structure is a ratchet tooth shape. The ratchet tooth shape of the end face tooth structure is set obliquely according to the turning direction of the turning gear sleeve 6. Compared with the straight tooth shape, the ratchet tooth shape can fit tightly when the two end face tooth structures are meshed, and the contact performance is good.

[0022] Assuming that the axial center distance between the first synchronous shaft 58 and the swing pin shaft 515 is c1, and the axial center distance between the upper connecting shaft 54 ​​and the first synchronous shaft 58 is c2, the axial movement distance d2 of the lower connecting shaft 510 along the turning shaft sleeve 6 satisfies the following formula: d1 / c1=d2 / c2; Wherein, d1 is the extension and contraction variation of the piston rod of the electric cylinder 513.

[0023] Figure 5 A schematic diagram of the working state of the turning gear action device 5 is given, wherein the solid line represents the initial state of the turning gear action device 5, and the dotted line represents the state when the turning gear action device 5 drives the turning gear sleeve 6 to engage with the driven shaft head 9, c1 and c2 are both fixed values, and when the piston rod of the electric cylinder 513 extends by a change of d1, the lower connecting shaft 510 moves forward d2 along the axial direction of the turning gear sleeve 6.

[0024] The distance that the turning shaft sleeve 6 needs to slide forward from the initial state of separation from the driven shaft head 9 to the state of complete engagement with the driven shaft head 9 is defined as the first moving distance d3. The first moving distance d3 satisfies the following formula: d3=b0-a1-a2+D1-D2; Among them, b0 is the initial distance between the first reference plane 81 and the second reference plane 82, a1 is the distance from the first reference plane 81 to the end face tooth tip of the turning shaft sleeve 6, and a2 is the distance from the second reference plane 82 to the end face tooth structure root distance of the driven shaft head 9.

[0025] Embodiment 2: Figures 1 to 10 As shown, a large-scale continuous wind tunnel follow-up turning method is implemented based on a large-scale continuous wind tunnel follow-up turning device described in Example 1, and includes the following steps: Step 1: First, the turning controller 7 obtains the data collected by the laser displacement meter 8 and calculates the distance between the first reference plane 81 and the second reference plane 82. The turning controller 7 calculates the first moving distance d3 of the turning shaft sleeve 6 through a formula. Then, the turning controller 7 calculates the extension amount d1 of the electric cylinder 513 when d3=d2. Step 2: Start the turning motor 1 to make the turning shaft sleeve 6 rotate at a speed of 1 rpm; Step 3: The turning controller 7 controls the piston rod of the electric cylinder 513 to extend a length of d1, and the transmission mechanism drives the upper connecting shaft 54 ​​and the lower connecting shaft 510 to move forward an axial distance of d2, so that the turning sleeve 6 and the end face tooth structure of the driven shaft head 9 are fully meshed, and the distance between the first reference surface 81 and the second reference surface 82 is marked as b1. The spring of the turning action device 5 is in a stressed state, and the turning sleeve 6 drives the driven shaft head 9 to rotate together at a speed of 1 rpm. Step 4: To avoid long-term contact and wear between the lower connecting shaft 510 and the annular positioning groove 61 of the turning gear sleeve 6, the turning gear controller 7 drives the lower connecting shaft 510 to move backward by an axial distance of (D1-D2) / 2 through the electric cylinder 513, so that the center line of the lower connecting shaft 510 coincides with the center line of the groove width of the annular positioning groove 61; Step 5: When the driven shaft head 9 is in a cold state, the turning shaft sleeve 6 is kept rotating at a speed of 1 rpm, and the laser displacement meter 8 monitors the real-time distance b2 between the turning shaft sleeve 6 and the driven shaft head 9 at a fixed period, such as 1 Hz; When the driven shaft head 9 is in a hot state, as the turning is carried out, the driven shaft length will gradually shorten in the process of changing from a hot state to a cold state. In order to avoid the failure of the engagement between the turning shaft sleeve 6 and the driven shaft head 9, a threshold value k is set. If b2-b1 is less than k, the turning shaft sleeve 6 maintains the current axial position; if b2-b1 reaches k, the turning controller 7 drives the lower connecting shaft 510 through the electric cylinder 513 to first move forward an axial distance of k+(D1-D2) / 2, and then successively move an axial distance of (D1-D2) / 2; Step 6: When the turning gear needs to be stopped, the turning gear motor 1 is turned off, and when the turning gear sleeve 6 and the driven shaft head 9 are completely still, the piston rod of the electric cylinder 513 is controlled to retract, so that the turning gear sleeve 6 and the driven shaft head 9 are separated. The lower connecting shaft 510 pushes the turning gear sleeve 6 back to the initial position before starting, and the spring returns to the relaxed state.

[0026] The above embodiments are merely exemplary descriptions of the present invention and do not limit its protection scope. Those skilled in the art may also make partial changes thereto, which are within the protection scope of the present invention as long as they do not exceed the spirit of the present invention.

Claims

1. A large-scale continuous wind tunnel follow-up turning device, characterized in that: The invention comprises a turning gear base (11), a turning gear motor (1), a reducer (2), a turning gear shaft (4), a turning gear sleeve (6) and a turning gear actuating device (5). The turning gear motor (1) and the reducer (2) are fixed on the turning gear base (11). The output end of the turning gear motor (1) is connected to the high-speed end of the reducer (2). The low-speed end of the reducer (2) is connected to the turning gear shaft (4). The outer periphery of the turning gear shaft (4) is provided with a spline structure. The turning gear sleeve (6) is sleeved on the turning gear shaft (4). The inner hole of the turning gear sleeve (6) is provided with a spline structure. The turning gear shaft (4) and the turning gear sleeve (6) are axially slidably matched through the spline structure. The turning gear sleeve (6) is coaxially arranged on the rear side of the driven shaft head (9), and the end faces of the turning gear sleeve (6) and the driven shaft head (9) opposite to each other are provided with end face tooth structures that mesh or separate with each other. The outer cover of the turning gear motor (1), the reducer (2) and the turning gear shaft (4) is provided with a turning gear housing (3), and the front end of the turning gear housing (3) is provided with a flange opening for the driven shaft head (9) to extend into, and the flange opening is sealed and connected to the housing of the driven shaft head (9), so that a closed space is formed in the turning gear housing (3), and the turning gear housing (3) is provided with a turning gear actuating device (5), a laser displacement meter (8) and A turning gear controller (7) is provided with an annular positioning groove (61) on the outer periphery of a turning gear shaft sleeve (6), the cross section of the annular positioning groove (61) being rectangular, a turning gear actuating device (5) comprising an electric cylinder (513), a transmission mechanism and a lower connecting shaft (510), a piston rod of the electric cylinder (513) being connected to a power input end of the transmission mechanism, the lower connecting shaft (510) being connected to a power output end of the transmission mechanism, an end of the lower connecting shaft (510) close to the turning gear shaft sleeve (6) being inserted into the annular positioning groove (61), the electric cylinder (513) driving the lower connecting shaft (510) to swing back and forth through the transmission mechanism, and the driven A position reference shoulder (91) is machined on the moving shaft head (9), and an end surface of the annular positioning groove (61) close to the driven shaft head (9) is defined as a first reference surface (81), and an end surface of the position reference shoulder (91) close to the turning shaft sleeve (6) is defined as a second reference surface (82). A laser displacement meter (8) collects position data of the first reference surface (81) and the second reference surface (82). The laser displacement meter (8) and the electric cylinder (513) are respectively electrically connected to the turning controller (7). The turning controller (7) obtains the data collected by the laser displacement meter (8) and controls the extension and retraction of the piston rod of the electric cylinder (513).

2. A large-scale continuous wind tunnel follow-up turning device according to claim 1, characterized in that: The turning gear actuating device (5) further comprises a seat plate (57). An inspection port is provided on the upper side of the turning gear housing (3). The seat plate (57) can be detachably sealed to close the inspection port. The transmission mechanism comprises an upper connecting shaft (54), a first upper connecting rod (53), a second upper connecting rod (55), a first lower connecting rod (59) and a second lower connecting rod (511). A first synchronizing shaft (58) and a second synchronizing shaft (512) are arranged on the seat plate (57) on the left and right. The first synchronizing shaft (58) and the second synchronizing shaft (512) are respectively rotatably sealed with the seat plate (57). The first synchronizing shaft (58) and the second synchronizing shaft (512) are respectively symmetrically arranged on both sides of the axis of the turning gear shaft sleeve (6). The middle part of the first upper connecting rod (53) is connected to the first synchronizing shaft (59). The first lower connecting rod (53) is connected to the upper end of the first synchronizing shaft (512), the middle part of the second upper connecting rod (55) is connected to the upper end of the second synchronizing shaft (512), the left end of the first lower connecting rod (59) is connected to the lower end of the first synchronizing shaft (58), the right end of the second lower connecting rod (511) is connected to the lower end of the second synchronizing shaft (512), the left end of the second lower connecting rod (511) is the power output end of the transmission mechanism, the lower connecting shaft (510) is penetrated through the left end of the second lower connecting rod (511), the right end of the first lower connecting rod (59) is provided with an oblong hole along the length direction, the lower end of the lower connecting shaft (510) is inserted into the annular positioning groove (61), and the upper end of the lower connecting shaft (510) is slidably matched with the oblong hole of the first lower connecting rod (59), and the first upper connecting rod (53) is connected to the upper end of the first synchronizing shaft (512). ) is penetrated by an upper connecting shaft (54), a left end of the second upper connecting rod (55) is provided with an oblong hole along the length direction, the upper end of the upper connecting shaft (54) is slidably matched with the oblong hole of the second upper connecting rod (55), the upper connecting shaft (54) and the lower connecting shaft (510) are vertically aligned, a first spring seat (51) is provided at the left end of the first upper connecting rod (53), a second spring seat (56) is provided at the right end of the second upper connecting rod (55), the first spring seat (51) and the second spring seat (56) are connected via a tension spring (52), a swing rod (514) is a transmission input end of the transmission mechanism, the rear end of the swing rod (514) is connected to the first upper connecting rod (53), and the front end of the swing rod (514) is provided with an oblong hole along the length direction The swing rod (514) is perpendicular to the first upper connecting rod (53), the first synchronous shaft (58) is located on the length extension line of the swing rod (514), an electric cylinder (513) is provided on the front side of the seat plate (57), the piston rod of the electric cylinder (513) is arranged to the left, a swing pin (515) is passed through the piston rod of the electric cylinder (513), and the swing pin (515) is slidably matched with the oblong hole of the swing rod (514), when the piston rod of the electric cylinder (513) is extended, the lower connecting shaft (510) swings forward, the turning shaft sleeve (6) and the driven shaft head (9) are meshed through the end face gear structure, and when the piston rod of the electric cylinder (513) is retracted, the lower connecting shaft (510) swings backward, and the turning shaft sleeve (6) and the driven shaft head (9) are separated.

3. A large-scale continuous wind tunnel follow-up turning device according to claim 2, characterized in that: A groove width D1 of the annular positioning groove (61) is greater than a diameter D2 of the lower connecting shaft (510), and an axial length of the spline structure of the turning shaft sleeve (6) is greater than a maximum axial stroke of the lower connecting shaft (510).

4. A large-scale continuous wind tunnel follow-up turning device according to claim 3, characterized in that: The tooth shape of the end face tooth structure is a ratchet tooth shape.

5. A large-scale continuous wind tunnel follow-up turning device according to claim 4, characterized in that: Assuming that the axial center distance between the first synchronous shaft (58) and the swing pin shaft (515) is c1, and the axial center distance between the upper connecting shaft (54) and the first synchronous shaft (58) is c2, the axial movement distance d2 of the lower connecting shaft (510) along the turning shaft sleeve (6) satisfies the following formula: d1 / c1=d2 / c2; Wherein, d1 is the extension and contraction variation of the piston rod of the electric cylinder (513).

6. A large-scale continuous wind tunnel follow-up turning device according to claim 5, characterized in that: The distance that the turning shaft sleeve (6) needs to slide forward from the initial state of separation from the driven shaft head (9) to the state of complete engagement with the driven shaft head (9) is defined as the initial movement distance d3. The initial movement distance d3 satisfies the following formula: d3=b0-a1-a2+D1-D2; Wherein, b0 is the initial spacing between the first reference surface (81) and the second reference surface (82), a1 is the distance from the first reference surface (81) to the tooth tip of the end face tooth of the turning shaft sleeve (6), and a2 is the distance from the second reference surface (82) to the tooth root of the end face tooth structure of the driven shaft head (9).

7. A large-scale continuous wind tunnel follow-up turning method, which is realized by relying on a large-scale continuous wind tunnel follow-up turning device as claimed in claim 6, characterized in that: The following steps are involved: Step 1: First, the turning controller (7) obtains data collected by the laser displacement meter (8) and calculates the distance between the first reference surface (81) and the second reference surface (82). The turning controller (7) calculates the first movement distance d3 of the turning shaft sleeve (6) by a formula. Then, the turning controller (7) calculates the extension amount d1 of the electric cylinder (513) when d3=d2. Step 2: Start the turning motor (1) to make the turning shaft sleeve (6) rotate at a speed of 1 rpm; Step 3: The turning controller (7) controls the piston rod of the electric cylinder (513) to extend a length of d1, and the transmission mechanism drives the upper connecting shaft (54) and the lower connecting shaft (510) to move forward an axial distance of d2, so that the turning shaft sleeve (6) and the end face tooth structure of the driven shaft head (9) are fully engaged, and the distance between the first reference plane (81) and the second reference plane (82) is marked as b1, and the turning shaft sleeve (6) drives the driven shaft head (9) to rotate together at a speed of 1 rpm; Step 4: The turning controller (7) drives the lower connecting shaft (510) to move backwards by an axial distance of (D1-D2) / 2 via the electric cylinder (513), so that the center line of the lower connecting shaft (510) coincides with the center line of the groove width of the annular positioning groove (61); Step 5: When the driven shaft head (9) is in a cold state, the turning shaft sleeve (6) is kept rotating together at a speed of 1 rpm, and the laser displacement meter (8) monitors the real-time distance b2 between the turning shaft sleeve (6) and the driven shaft head (9) at a fixed period; When the driven shaft head (9) is in a hot state, a threshold value k is set. If (b2-b1) is less than k, the turning shaft sleeve (6) maintains the current axial position. If (b2-b1) reaches k, the turning controller (7) drives the lower connecting shaft (510) through the electric cylinder (513) to first move forward an axial distance of k+(D1-D2) / 2, and then successively move an axial distance of (D1-D2) / 2. Step 6: When it is necessary to stop the turning, the turning motor (1) is turned off, and when the turning shaft sleeve (6) and the driven shaft head (9) are completely still, the piston rod of the electric cylinder (513) is controlled to retract, so that the turning shaft sleeve (6) and the driven shaft head (9) are separated.

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