Electric barring gear and industrial equipment

Abstract

The invention belongs to the technical field of industrial equipment, and discloses an electric jigger and industrial equipment. The electric jigger comprises a shell, a driving assembly and a transmission assembly. The driving assembly comprises a first driver and a second driver. The transmission assembly comprises a transmission shaft and a gear engaging gear, a first end journal of the transmission shaft is rotationally arranged on the shell, the output end of the first driver is connected with a second end journal of the transmission shaft and can drive the transmission shaft to rotate, the transmission shaft is sleeved with the gear engaging gear, and a spiral groove is formed in the inner wall of the gear engaging gear. A spiral key matched with the spiral groove is arranged on the transmission shaft, and the output end of the second driver is rotationally connected with the gear engaging gear, so that the gear engaging gear can be inserted into the tooth groove of the meshing tooth, and gear deformation and abrasion caused by continuous collision of the gear are prevented. According to the industrial equipment, the electric jigger is fixed on a case, so that when the industrial equipment is just stopped or stopped for a long time, the rotor rotates, and the rotor is prevented from bending and deforming.

Description

Technical Field

[0001] The present invention relates to the field of industrial equipment, and in particular to an electric turning gear and industrial equipment. Background Art

[0002] For industrial equipment with large rotors, such as high-power motors, steam turbines, and compressors, steam is usually used to push the rotor to rotate the rotor set in the cylinder to maintain the operation of the industrial equipment. During use, the following situations usually cause the rotor to bend and deform: 1) When the industrial equipment is just shut down and the rotor stops rotating, the residual steam from the operation of the industrial equipment will gather at the air inlet of the steam delivery pipeline located at the cylinder, resulting in a temperature difference between the cylinder body on one side of the air inlet and the cylinder body on the other side, which in turn causes the part of the rotor located on one side of the air inlet to exchange heat with the cylinder body, while the other parts of the rotor do not exchange heat with the cylinder body, so that the rotor is unevenly heated as a whole, causing the rotor to bend and deform; 2) When the industrial equipment is shut down for a long time and the rotor is stationary for a long time, the gravity factor will cause the rotor to be unevenly stressed, causing the rotor to bend and deform.

[0003] In order to solve the above problems, in the prior art, a winch is usually provided on the housing of the industrial equipment, meshing teeth are provided on the outer periphery of the rotor, and a transmission gear that can mesh with the meshing teeth of the rotor is provided on the transmission shaft of the winch, and the winch also includes a driving assembly, which can drive the transmission gear to move relative to the transmission shaft of the winch, so that the transmission gear has a meshing position meshing with the rotor and a avoidance position away from the rotor. When the industrial equipment is just shut down, the transmission gear can be switched to the meshing position so that one or more teeth of the transmission gear are correspondingly inserted into the tooth grooves of the meshing teeth of the rotor. After the meshing conditions of the gears are met, the rotation of the transmission gear can drive the rotor to rotate, thereby preventing the rotor from bending and deforming due to uneven local heating; when the industrial equipment is shut down for a long time, the transmission gear can also be switched to the meshing position to drive the rotor to rotate periodically, thereby preventing the rotor from bending and deforming due to uneven force due to gravity for a long time. However, when the transmission gear switches from the avoidance position to the meshing position, it often fails to accurately correspond to the tooth grooves of the rotor's meshing teeth, thereby failing to meet the gear meshing conditions to achieve normal gear meshing. At the same time, the transmission gear will also continuously collide with the meshing teeth during this process, causing the gear to deform and wear.

[0004] Therefore, an electric turning gear and industrial equipment are urgently needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an electric turning gear and industrial equipment to achieve normal meshing of the meshing teeth of the transmission gear and the rotor and prevent the two from continuously colliding and causing gear wear.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In a first aspect, an electric turning gear is provided, characterized in that it comprises:

[0008] case;

[0009] A drive assembly, comprising a first drive and a second drive;

[0010] The transmission assembly includes a transmission shaft and a shift gear. The first end journal of the transmission shaft is rotatably arranged on the shell. The output end of the first driver is connected to the second end journal of the transmission shaft to drive the transmission shaft to rotate. The shift gear is sleeved on the transmission shaft. A spiral groove is arranged on the inner wall of the shift gear. A spiral key matching the spiral groove is arranged on the transmission shaft. The output end of the second driver is rotatably connected to the shift gear to drive the shift gear to move along the axial direction of the transmission shaft, so as to approach the rotor of the industrial equipment and mesh with the meshing teeth on the rotor.

[0011] Preferably, the tooth top circle radius of the shift gear is smaller than the tooth top circle radius of the meshing tooth.

[0012] Preferably, the electric turning gear further comprises a limit assembly, and the limit assembly is used to limit the axial movement of the gear engaging gear along the transmission shaft.

[0013] Preferably, the limiting component includes:

[0014] A first limiter is provided on the transmission shaft and is located between the second end journal and the spiral key, and the first limiter is used to limit the maximum displacement of the gear shifting gear moving in a direction close to the second end journal;

[0015] The second limiter is arranged on the housing, and is used for limiting the maximum displacement of the shifting gear in the direction away from the second end journal.

[0016] Preferably, the transmission shaft comprises a first shaft section, a second shaft section and a third shaft section which are connected in sequence, the first shaft section is an optical axis, and one end of the first shaft section away from the second shaft section forms a first end journal, the spiral key is arranged on the second shaft section, and one end of the third shaft section away from the second shaft section forms a second end journal;

[0017] The inner hole of the shift gear comprises a first hole and a second hole which are connected to each other. The spiral groove is arranged on the hole wall of the first hole. The second hole is a light hole and is slidably matched with the first shaft section.

[0018] Preferably, the first end journal and the second end journal are rotatably connected to the housing via corresponding bearing groups, respectively.

[0019] Preferably, a torque sensor is coaxially arranged on the first end journal.

[0020] Preferably, the first driver is fixedly connected to the second end journal via a safety coupling.

[0021] Preferably, the second driver is a hydraulic cylinder.

[0022] In a second aspect, an industrial device is provided, characterized in that it includes a chassis, a rotor and the above-mentioned electric winch, wherein the shell of the electric winch is fixed on the chassis, and the electric winch can drive the rotor to rotate.

[0023] Beneficial effects of the present invention:

[0024] The electric winch provided by the present invention modularizes the electric winch by arranging both the driving assembly and the transmission assembly on a shell. The connection between the entire electric winch and the industrial equipment can be achieved by only fixing the shell on the chassis of the industrial equipment. The second driver is arranged so that the second driver can drive the gearshift gear to move along the axial direction of the transmission shaft when it is working, so as to approach the rotor of the industrial equipment and mesh with the meshing teeth on the rotor, thereby preventing the gear from continuously colliding and causing deformation and wear. The first driver is arranged so that the first driver can drive the transmission shaft to rotate when it is working, thereby driving the gearshift gear sleeved on the transmission shaft to rotate, thereby realizing the rotation of the rotor, thereby preventing the rotor from bending and deforming due to uneven heating or long-term standing. A spiral groove is arranged on the gear, and a spiral key matching the spiral groove is arranged on the transmission shaft. When the second driver drives the shift gear to move along the axial direction of the transmission shaft, the spiral key can slide along the extension direction of the spiral groove. Therefore, when the shift gear collides with the meshing tooth, the shift gear can continue to rotate until the teeth of the shift gear are aligned with the meshing teeth. The second driver continues to drive the shift gear to move along the axial direction of the transmission shaft. Because the spiral groove matches the spiral key, the shift gear can no longer rotate but only move along the axial direction of the transmission shaft. The first driver can continue to drive the transmission shaft to rotate, so as to prevent the teeth of the shift gear from being aligned with the meshing teeth. The torque transmitted to the meshing teeth is less than the starting torque of the rotor, and the rotor remains stationary, so that the first driver is blocked and damaged.

[0025] The present invention also provides an industrial equipment, by fixing the electric winch on a chassis, so that when the industrial equipment is just shut down or shut down for a long time, the rotor can be rotated to prevent the rotor of the industrial equipment from bending and deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the electric turning gear provided by the present invention in a non-gear position;

[0027] Figure 2 It is a structural schematic diagram of the electric turning gear provided by the present invention in a gear engaging position;

[0028] Figure 3It is a structural schematic diagram of the transmission shaft of the electric turning gear provided by the present invention;

[0029] Figure 4 It is a schematic structural diagram of the gear engaging gear of the electric turning gear provided by the present invention;

[0030] Figure 5 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0031] In the figure:

[0032] 100, meshing teeth;

[0033] 1. Shell;

[0034] 2. drive assembly; 21. first drive; 22. second drive; 221. medium cavity; 222. medium flow hole; 223. sealing element;

[0035] 3. Transmission assembly; 31. Transmission shaft; 311. First end journal; 312. Second end journal; 313. Screw key; 314. First stopper; 315. Optical axis;

[0036] 32, gear shifting gear; 321, spiral groove; 322, light hole;

[0037] 4. The second limiter;

[0038] 5. Bearing group; 51. First bearing; 52. Second bearing. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] When industrial equipment with a large rotor is just shut down or has been shut down for a long time, its rotor is in a stationary state. Therefore, one or several teeth of the electric winch's transmission gear are inserted into the tooth grooves of the meshing teeth of the rotor of the industrial equipment to meet the meshing conditions of the gears, so that the electric winch can drive the rotor to rotate, which is the key to preventing the rotor from bending and deforming. However, when the transmission gear switches from the avoidance position to the meshing position, if the teeth of the transmission gear cannot face the tooth grooves of the meshing teeth of the rotor, the meshing teeth of the transmission gear and the rotor will continuously collide, causing serious wear on the meshing teeth. In order to solve the above technical problems, the present invention provides an electric winch that can drive the rotor to rotate when the industrial equipment is just shut down or has been shut down for a long time, and avoid the wear of the meshing teeth on the rotor due to continuous collisions. The electric winch and industrial equipment provided by the present invention are introduced in detail below.

[0044] Figure 1 The schematic diagram of the structure of the electric turning gear provided by the present invention is shown in a non-gear position. Figure 2 The schematic diagram of the structure of the electric turning gear provided by the present invention is shown in the gear engaging position. Figure 3 The figure shows a schematic diagram of the structure of the transmission shaft of the electric turning gear provided by the present invention. Figure 4 The figure shows the schematic diagram of the structure of the gear shifting device of the electric turning gear provided by the present invention. Figures 1 to 4As shown, the electric winch provided by the present invention includes a shell 1, a drive assembly 2 and a transmission assembly 3, the drive assembly 2 includes a first driver 21 and a second driver 22; the transmission assembly 3 includes a transmission shaft 31 and a shift gear 32, the first end journal 311 of the transmission shaft 31 is rotatably set on the shell 1, the output end of the first driver 21 is connected to the second end journal 312 of the transmission shaft 31 to drive the transmission shaft 31 to rotate, the shift gear 32 is sleeved on the transmission shaft 31, a spiral groove 321 is provided on the inner wall of the shift gear 32, and a spiral key 313 matching the spiral groove 321 is provided on the transmission shaft 31, the output end of the second driver 22 is rotatably connected to the shift gear 32 to drive the shift gear 32 to move along the axial direction of the transmission shaft 31, so as to approach the rotor of the industrial equipment and mesh with the meshing teeth 100 on the rotor.

[0045] The electric winch provided in the present embodiment modularizes the electric winch by arranging both the driving component 2 and the transmission component 3 on the shell 1. The connection between the entire electric winch and the industrial equipment can be achieved by only fixing the shell 1 on the chassis of the industrial equipment. The second driver 22 is arranged. When the second driver 22 is working, it can drive the shift gear 32 to move along the axial direction of the transmission shaft 31 so as to approach the rotor of the industrial equipment and mesh with the meshing teeth 100 on the rotor. The first driver 21 is arranged. When the first driver 21 is working, it can drive the transmission shaft 31 to rotate, thereby driving the shift gear 32 sleeved on the transmission shaft 31 to rotate, and then realizing the rotation of the rotor, thereby preventing the rotor from bending and deforming due to uneven heating or long-term static state. The spiral groove 321 is arranged on the inner wall of the shift gear 32, and the spiral key 313 matching the spiral groove 321 is arranged on the transmission shaft 31. When the second driver 21 is engaged, the gear 32 is engaged with the gear 32. When the actuator 22 drives the shift gear 32 to move along the axial direction of the transmission shaft 31, the spiral key 313 can slide along the extension direction of the spiral groove 321, so that when the shift gear 32 collides with the meshing tooth 100, the shift gear 32 can continue to rotate until the teeth of the shift gear 32 are aligned with the meshing tooth 100, and the second driver 22 continues to drive the shift gear 32 to move along the axial direction of the transmission shaft 31. Because the spiral groove 321 cooperates with the spiral key 313 and the shift gear 32 is constrained by the tooth groove surface of the meshing tooth 100, the shift gear 32 can no longer rotate but only move along the axial direction of the transmission shaft 31. The first driver 21 can continue to drive the transmission shaft 31 to rotate, to prevent the teeth of the shift gear 32 from being aligned with the tooth grooves of the meshing tooth 100. Because the torque transmitted to the meshing tooth 100 is less than the starting torque of the rotor, the rotor remains stationary, and the first driver 21 is therefore blocked and damaged.

[0046] It is understandable that after the industrial equipment is shut down for a certain period of time and the steam heat energy is exhausted and the necessary posture adjustment of the rotor for the long-term shutdown is completed, the electric winch will no longer drive the rotor to rotate.

[0047] It is worth noting that the electric turning gear provided in this embodiment further includes a controller, which is in communication with the first driver 21 and the second driver 22. When it is necessary to drive the rotor to rotate, the controller controls the second driver 22 to start, so as to drive the gear shifting gear 32 to move along the axial direction of the transmission shaft 31 toward the gear shifting position. At the same time, the controller controls the first driver 21 to start, so as to drive the transmission shaft 31 to rotate, and the gear shifting gear 32 rotates with the rotation of the transmission shaft 31. When the gear shifting gear 32 moves to contact with the meshing teeth 100 of the rotor, the gear shifting gear 32 stops moving along the axis of the transmission shaft 31 under the force between the gear shifting gear 32 and the rotor. The shift gear 32 does not move in the linear direction, but it will continue to rotate with the transmission shaft 31. When one or more teeth of the shift gear 32 are facing the tooth grooves of the meshing teeth 100 of the rotor, the second driver 22 can continue to drive the shift gear 32 to move along the axial direction of the transmission shaft 31, thereby realizing the normal engagement of the shift gear 32 with the meshing teeth 100 of the rotor. Because the shift gear 32 can mesh normally with the meshing teeth 100 of the rotor, the shift gear 32 will not continuously impact and collide with the meshing teeth 100, thereby reducing the wear of the meshing teeth 100 and preventing the meshing teeth 100 from being deformed due to continuous impact. When the shift gear 32 is just facing the tooth groove of the meshing tooth 100 of the rotor, because the shift gear 32 and the meshing tooth 100 do not overlap in the tooth width direction, the shift gear 32 cannot completely transmit the torque to the meshing tooth 100, resulting in the torque transmitted by the first driver 21 being less than the starting torque of the rotor. At this time, the teeth of the shift gear 32 are constrained by the tooth groove surface of the meshing tooth 100 and cannot continue to rotate with the transmission shaft 31, but due to the cooperation between the spiral key 313 of the transmission shaft 31 and the spiral groove 321 of the shift gear 32, the first driver 21 can continue to drive the shift gear 32 to move toward the gear position. In the process of the shift gear 32 moving to the gear position, the shift gear 32 and the meshing tooth 100 are connected. The meshing teeth 100 gradually overlap in the tooth width direction, and the shift gear 32 eventually completely overlaps with the meshing teeth 100 in the tooth width direction. The torque transmitted to the meshing teeth 100 by the first driver 21 will also gradually increase. When the torque provided by the first driver 21 is greater than the starting torque of the rotor, the rotor starts to rotate, and when the shift gear 32 completely overlaps with the meshing teeth 100 in the tooth width direction, that is, when the shift gear 32 is in the gear position, the torque provided by the first driver 21 reaches a maximum value. At this time, the controller controls the second driver 22 so that the shift gear 32 no longer moves along the axial direction of the transmission shaft 31. The shift gear 32 drives the meshing teeth 100 of the rotor to rotate, thereby gradually increasing the rotation speed of the rotor.

[0048] In some embodiments, the tooth top circle radius of the shift gear 32 is smaller than the meshing tooth 100, so when the shift gear 32 and the meshing tooth 100 are normally meshed and the angular velocity is the same, the linear velocity of the meshing tooth 100 will be greater than the linear velocity of the shift gear 32 and a speed difference will be generated. Under the action of the speed difference between the shift gear 32 and the meshing tooth 100, the shift gear 32 will move from the gear position to the non-gear position along the axial direction of the transmission shaft 31 while maintaining rotation. After the shift gear 32 moves a certain distance, it will eventually no longer mesh with the meshing tooth 100 of the rotor, and the shift gear 32 will be separated from the meshing tooth 100, thereby realizing the automatic withdrawal of the shift gear 32 when the rotor of the industrial equipment increases its speed, so that the rotor only rotates periodically to reduce the energy consumption caused by the use of the electric winch, thereby reducing the operating cost of the industrial equipment.

[0049] like Figures 2 to 4 As shown, the electric turning gear also includes a limit assembly, which is used to limit the axial movement of the gear shifting gear 32 along the transmission shaft 31, so that the gear shifting gear 32 can only move along the axial direction of the transmission shaft 31 within a specific range, thereby preventing the gear shifting gear 32 from mechanically interfering with the housing 1. Specifically, the limit assembly includes a first limit member 314 and a second limit member 4, the first limit member 314 is arranged on the transmission shaft 31, and is located between the second end journal 312 and the spiral key 313, and the first limit member 314 is used to limit the maximum displacement of the gear shifting gear 32 moving in the direction close to the second end journal 312; the second limit member 4 is arranged on the housing 1, and the second limit member 4 is used to limit the maximum displacement of the gear shifting gear 32 moving in the direction away from the second end journal 312.

[0050] When the gear engaging gear 32 moves from the non-gear engaging position to the gear engaging position along the axial direction of the transmission shaft 31, when it contacts the first stopper 314, the gear engaging gear 32 and the meshing teeth 100 of the rotor are completely aligned in the tooth width direction, and the first stopper 314 can prevent the gear engaging gear 32 from continuing to move, thereby preventing the second driver 22 from continuing to drive the gear engaging gear 32 to continue to move along the axial direction of the transmission shaft 31, causing the gear engaging gear 32 and the meshing teeth 100 of the rotor to not completely overlap in the tooth width direction, thereby reducing the torque transmitted by the first driver 21 to the meshing teeth 100 of the rotor, thereby preventing the rotor from being unable to rotate due to the torque transmitted by the first driver 21 to the meshing teeth 100 of the rotor being less than the starting torque of the rotor. In this embodiment, the first stopper 314 is a shoulder formed on the transmission shaft 31.

[0051] When the gear engaging gear 32 moves from the gear engaging position to the non-gear engaging position along the axial direction of the transmission shaft 31, when it abuts against the second limit member 4, the gear engaging gear 32 stops moving further, thereby preventing the gear engaging gear 32 from continuing to move due to inertia, causing mechanical interference between it and other components of the housing 1 or the turning gear.

[0052] like Figures 1 to 4 As shown, the transmission shaft 31 includes a first shaft section, a second shaft section and a third shaft section connected in sequence, the first shaft section is a light shaft 315, and the end of the first shaft section away from the second shaft section forms the above-mentioned first end journal 311, the spiral key 313 is arranged on the second shaft section, and the end of the third shaft section away from the second shaft section forms the above-mentioned second end journal 312; the inner hole of the gear shifting gear 32 includes a first hole and a second hole connected to each other, the spiral groove 321 is arranged on the hole wall of the first hole, and the second hole is a light hole 322, and is slidably matched with the first shaft section. This arrangement can make the first shaft section share the impact load generated by the slight collision between the gear shifting gear 32 and the meshing teeth 100 of the rotor when the gear shifting gear 32 moves smoothly along the axial direction of the transmission shaft 31, so as to improve the ability to prevent gear deformation and wear.

[0053] like Figure 1 As shown, the first end journal 311 and the second end journal 312 are rotatably connected to the housing 1 through the bearing group 5, respectively, so the transmission shaft 31 can be rotatably connected to the housing 1. Specifically, the bearing group 5 includes a first bearing 51 and a second bearing 52, the first end journal 311 is rotatably connected to the housing 1 through the first bearing 51, and the second end journal 312 is rotatably connected to the housing 1 through the second bearing 52. It is worth noting that the first bearing 51 and the second bearing 52 are both spherical roller bearings, which can withstand not only radial loads but also bidirectional axial loads. Any bearings used in pairs and capable of bearing axial loads and radial loads are within the protection scope of the present invention, and will not be described one by one.

[0054] The electric winch provided by the present invention can be applied to any industrial equipment with meshing teeth 100 arranged on the outside of the rotor. The starting torques of the rotors of different industrial equipment are completely different. Therefore, the electric winch provided by the present invention needs to provide starting torques of different sizes to rotate the rotor of the industrial equipment. In order to solve the above technical problems, the first end shaft neck 311 extends out of the shell 1, and a torque sensor is also coaxially arranged on the first end shaft neck 311. Therefore, the torque value provided by the first driver 21 to the meshing teeth 100 of the rotor can be monitored in real time, and first drivers 21 of different specifications can be replaced according to the actual torque value requirements.

[0055] Furthermore, in the process of continuously debugging the electric winch for the rotors of different industrial equipment, it is inevitable that the torque transmitted by the transmission shaft 31 to the meshing teeth 100 of the rotor is too large, which causes damage to the meshing teeth 100 of the rotor. Therefore, in order to solve the above technical problems, the first driver 21 is fixedly connected to the second end journal 312 through a safety coupling. When the torque transmitted by the transmission shaft 31 to the meshing teeth 100 of the rotor exceeds the set value due to overload or mechanical failure, the safety coupling limits the torque transmitted by the transmission shaft 31 in the form of slipping, and automatically restores the connection when the overload disappears, thereby preventing mechanical damage. Among them, the safety coupling is a relatively mature technology in the prior art, and this embodiment does not limit the specific structure of the safety coupling.

[0056] Continue as Figure 1 As shown, the second driver 22 is a hydraulic cylinder, so that it can provide reliable thrust for the shift gear 32 to move axially along the transmission shaft 31 .

[0057] Figure 5 Shows Figure 2 In some embodiments, as shown in FIG. Figure 5 As shown, the second driver 22 includes a medium cavity 221 and a medium flow hole 222, one end of the gear shifting gear 32 extends into the medium cavity 221, and the controller can control the working medium to enter the medium cavity 221 through the medium flow hole 222 to make the gear shifting gear 32 move along the axial direction of the transmission shaft 31. It is worth noting that the working medium can be hydraulic oil, gas or other medium that can push the gear shifting gear 32 to move along the axial direction of the transmission shaft 31.

[0058] Furthermore, a seal 223 is provided between the medium cavity 221 and the shift gear 32 to prevent the working medium from leaking from the medium cavity 221 , thereby enabling the shift gear 32 to move smoothly along the axial direction of the transmission shaft 31 .

[0059] The present invention also provides an industrial device, including a chassis, a rotor and the above-mentioned electric winch, wherein the housing 1 of the electric winch is fixed to the chassis of the industrial device, so that when the industrial device is just shut down or shut down for a long time, the gear 32 and the meshing teeth 100 of the rotor can be normally engaged, and the electric winch can drive the rotor to rotate, prevent the rotor from bending and deforming, and prevent the gear from continuously bumping, thereby causing deformation and wear. The industrial device of the present invention can be various industrial devices with rotors, such as large rotating equipment such as steam turbines, gas turbines, compressors, and motors.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An electric turning gear, characterized in that: include: Housing (1); A drive assembly (2) comprising a first drive (21) and a second drive (22); A transmission assembly (3) comprises a transmission shaft (31) and a shift gear (32), wherein a first end journal (311) of the transmission shaft (31) is rotatably arranged on the housing (1), an output end of the first driver (21) is connected to a second end journal (312) of the transmission shaft (31) to drive the transmission shaft (31) to rotate, the shift gear (32) is sleeved on the transmission shaft (31), a spiral groove (321) is arranged on the inner wall of the shift gear (32), and a spiral key (313) matching the spiral groove (321) is arranged on the transmission shaft (31), and the output end of the second driver (22) is rotatably connected to the shift gear (32) to drive the shift gear (32) to move along the axial direction of the transmission shaft (31), thereby approaching a rotor of an industrial device and meshing with meshing teeth (100) on the rotor.

2. The electric turning gear according to claim 1, characterized in that: The tooth tip circle radius of the shift gear (32) is smaller than the tooth tip circle radius of the meshing tooth (100).

3. The electric turning gear according to claim 1, characterized in that: The electric turning gear also includes a limiting component, which is used to limit the axial movement of the shifting gear (32) along the transmission shaft (31).

4. The electric turning gear according to claim 3, characterized in that: The limiting component comprises: a first limiting member (314) disposed on the transmission shaft (31) and located between the second end journal (312) and the spiral key (313), the first limiting member (314) being used to limit the maximum displacement of the shifting gear (32) in a direction close to the second end journal (312); A second limiting member (4) is arranged on the housing (1), and the second limiting member (4) is used to limit the maximum displacement of the shifting gear (32) in a direction away from the second end journal (312).

5. The electric turning gear according to claim 1, characterized in that: The transmission shaft (31) comprises a first shaft section, a second shaft section and a third shaft section which are connected in sequence, the first shaft section is an optical axis (315), and one end of the first shaft section which is away from the second shaft section forms the first end journal (311), the spiral key (313) is arranged on the second shaft section, and one end of the third shaft section which is away from the second shaft section forms the second end journal (312); The inner hole of the shift gear (32) comprises a first hole and a second hole which are connected to each other, the spiral groove (321) is arranged on the hole wall of the first hole, and the second hole is a light hole (322) which is slidably matched with the first shaft section.

6. The electric turning gear according to claim 1, characterized in that: The first end journal (311) and the second end journal (312) are rotatably connected to the housing (1) via corresponding bearing groups (5), respectively.

7. The electric turning gear according to claim 1, characterized in that: A torque sensor is coaxially arranged on the first end journal (311).

8. The electric turning gear according to claim 7, characterized in that: The first driver (21) and the second end journal (312) are fixedly connected via a safety coupling.

9. The electric turning gear according to claim 1, characterized in that: The second driver (22) is a hydraulic cylinder.

10. An industrial device, characterized in that: It comprises a chassis, a rotor and an electric turning gear as claimed in any one of claims 1 to 9, wherein a housing (1) of the electric turning gear is fixed on the chassis, and the electric turning gear can drive the rotor to rotate.

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