CN213243748U

CN213243748U - Barring starting device and diesel engine

Info

Publication number: CN213243748U
Application number: CN202022359933.3U
Authority: CN
Inventors: 周千平; 于佃义; 牛振华; 林静
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-05-18
Anticipated expiration: 2030-10-21

Abstract

The embodiment of the utility model provides a barring starting drive and diesel engine. The utility model provides a barring starting drive includes: a variable frequency motor; the speed reducing mechanism is in transmission connection with the variable frequency motor; an output gear; the power output mechanism is in transmission connection with the speed reducing mechanism, is fixedly connected with the output gear and is used for driving the output gear to move between a first position and a second position along the axial direction of the output gear; and the controller is in communication connection with the variable frequency motor, and is used for controlling the variable frequency motor to rotate at a low speed when receiving the turning signal and controlling the variable frequency motor to rotate at a high speed when receiving the starting signal. The utility model also provides a diesel engine includes engine organism, bell housing above-mentioned barring starting drive promptly. The utility model provides a barring starting drive can carry out the barring and start two kinds of operations, saves the installation space of diesel engine.

Description

Barring starting device and diesel engine

Technical Field

The embodiment of the utility model provides a relate to the engine technology, especially relate to a barring starting drive and diesel engine.

Background

The diesel engine is newly installed or maintained, whether the rotation of an internal shaft system of the diesel engine has the phenomena of friction, collision, jamming and the like needs to be checked through turning operation, and the diesel engine can be normally started only when the turning operation does not feel abnormal, so that the safety is ensured. Wherein, the turning operation means that the shafting is slowly rotated.

The diesel engines in the related art are respectively provided with a starting device and a turning gear so as to perform a 'turning gear' operation and a normal starting operation. The starting gear of the starting device can penetrate through the flywheel shell to enter the machine body to be meshed with the gear ring of the shafting, so that the shafting is driven to rotate rapidly. The barring device is detachably connected with the flywheel shell, and when barring operation is needed, a barring gear of the barring device is meshed with a gear ring of the shafting to drive the shafting to rotate at a low speed.

However, the "turning" operation and the starting operation are performed by two separate devices, respectively, and the diesel engine requires a large installation space.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a barring starting drive and diesel engine to solve current diesel engine "barring" operation and start operation and be carried out by two sets of solitary devices respectively, the diesel engine need occupy very big installation space's problem.

According to the utility model discloses an aspect provides a barring starting device, include:

a variable frequency motor;

the input shaft of the speed reducing mechanism is in transmission connection with the output shaft of the variable frequency motor;

the output gear is used for being meshed with a gear ring of a shafting of the engine;

the input end of the power output mechanism is in transmission connection with the output shaft of the speed reducing mechanism, the output end of the power output mechanism is fixedly connected with the output gear, and the power output mechanism is used for driving the output gear to move between a first position and a second position along the axial direction of the output gear; when the output gear is in the first position, the output gear is engaged with the ring gear; when the output gear is in the second position, the output gear is disengaged from the ring gear;

and the controller is in communication connection with the variable frequency motor, and is used for controlling the variable frequency motor to rotate at a low speed when receiving a turning signal and controlling the variable frequency motor to rotate at a high speed when receiving a starting signal.

In an alternative implementation, the signal input end of the controller is connected in series with a barring line and a starting line, the barring line is arranged in parallel with the starting line, the barring line is used for inputting the barring signal to the controller, and the starting line is used for inputting the starting signal to the controller;

the controller responds to the turning signal and controls the variable frequency motor to rotate at a low speed; alternatively, the first and second electrodes may be,

the controller responds to the starting signal and controls the variable frequency motor to rotate at a high speed.

In an alternative implementation, the barring circuit is provided with a barring switch for triggering a barring signal, and the starting circuit is provided with a starting switch for triggering a starting signal.

In an optional implementation manner, the barring line is provided with a first coil, the starting line is provided with a first contact group, the first contact group comprises a first movable contact and a first fixed contact, and the first coil is used for generating magnetic force to attract the first movable contact in a power-on state so as to separate the first movable contact from the first fixed contact;

the starting circuit is provided with a second coil, and the second coil is used for generating magnetic force to attract the second movable contact in a power-on state so as to separate the second movable contact from the second fixed contact.

In an optional implementation manner, the starting control system further includes a control power supply and an operation switch, the control power supply is used for supplying power to the barring circuit and the starting circuit, and the operation switch is used for controlling a power supply state of the control power supply.

In an optional implementation manner, the variable frequency motor further comprises a storage battery, and the storage battery is electrically connected with the variable frequency motor and is used for supplying power to the variable frequency motor.

In an alternative implementation, the reduction mechanism includes a first reduction gear, a second reduction gear, an input shaft, and an output shaft;

the first reduction gear and the second reduction gear are meshed with each other, the number of teeth of the first reduction gear is smaller than that of teeth of the second reduction gear, the first reduction gear is fixedly connected with an input shaft of the reduction mechanism, and the second reduction gear is fixedly connected with an output shaft of the reduction mechanism.

In an optional implementation manner, the power output mechanism comprises a pull rod, a shifting fork seat, a shifting fork, a transmission shaft and a shell;

the pull rod, the shifting fork seat and the shifting fork are positioned in the shell,

one end of the transmission shaft is in transmission connection with an output shaft of the speed reducing mechanism, and the other end of the transmission shaft is fixedly connected with the output gear;

the length direction of the shifting fork seat is parallel to the axial direction of the transmission shaft, the first end of the shifting fork seat is fixedly connected with the shell, and the second end of the shifting fork seat is hinged with the shifting fork;

the first end of the shifting fork is connected with the first end of the pull rod, and the second end of the shifting fork is connected with the transmission shaft;

the pull rod is configured to move along the axial direction of the pull rod so as to drive the shifting fork to rotate around the hinged joint of the shifting fork and the shifting fork seat, and further drive the transmission shaft to move along the axial direction of the transmission shaft.

In an alternative implementation mode, the device also comprises an electromagnetic switch,

the shell is enclosed to form an installation cavity, the electromagnetic switch is sleeved outside the second end of the pull rod and is fixedly connected to the inner wall of the installation cavity; the electromagnetic switch is configured to generate magnetic force to attract the pull rod to move towards the second end of the pull rod along the axial direction of the pull rod in the electrified state;

the pull rod is provided with a limiting portion protruding from the side wall of the pull rod, the limiting portion is close to the first end of the pull rod, a spring is sleeved on the outer side of the pull rod, one end of the spring abuts against the limiting portion, and the other end of the spring abuts against the outer wall of the installation cavity.

According to another aspect of the embodiments of the present invention, there is provided a diesel engine, comprising an engine body, a flywheel housing and the barring starting device;

the engine body and the barring starting device are respectively located on two opposite sides of the flywheel shell and fixedly connected with the flywheel shell, and an output gear of the barring starting device can penetrate through the flywheel shell to be meshed with a gear ring of a shaft system in the engine body.

As can be understood by those skilled in the art, the jigger starting device of the present invention comprises a variable frequency motor, a speed reducing mechanism, an output gear, a power output mechanism and a controller. The variable frequency motor is used as a power source of the barring starting device. And an input shaft of the speed reducing mechanism is in transmission connection with an output shaft of the variable frequency motor. The output gear is used for being meshed with a gear ring of a shafting of the engine. The input end of the power output mechanism is in transmission connection with the output shaft of the speed reducing mechanism, and the output end of the power output mechanism is fixedly connected with the output gear and used for driving the output gear to move between a first position and a second position along the axial direction of the output gear, so that the output gear is meshed with or separated from the gear ring. The controller is in communication connection with the variable frequency motor and is used for controlling the variable frequency motor to rotate at a low speed when receiving the turning signal and controlling the variable frequency motor to rotate at a high speed when receiving the starting signal. Therefore, the controller can be used for controlling the rotating speed of the variable frequency motor, when the controller receives a barring signal, the variable frequency motor is controlled to rotate at a low speed to drive the gear ring of the shafting to rotate at a low speed for barring, and when the controller receives a starting signal, the variable frequency motor is controlled to rotate at a high speed to drive the gear ring of the shafting to rotate at a high speed for starting, so that the barring and starting operation can be realized by using the same set of device, and compared with the prior art, the installation space of a diesel engine is saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a barring starting device according to an embodiment of the present invention;

fig. 2 is a schematic circuit diagram of a barring starting device according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a barring starting device according to an embodiment of the present invention.

Description of reference numerals:

1-a variable frequency motor;

11-a frequency converter;

12-an electric motor;

2-a speed reduction mechanism;

3-an output gear;

4-a power take-off mechanism;

41-a pull rod;

411-a limiting part;

412-a spring;

42-pulling fork seat;

43-shifting fork;

44-a drive shaft;

45-a housing;

451-a mounting cavity;

46-an electromagnetic switch;

5-a controller;

51-barring line;

511-barring switch;

512-a first coil;

513 — a second set of contacts;

52-start line;

521-start switch;

522-a first set of contacts;

523-a second coil;

53-control power supply;

54-run switch;

55-storage battery.

Detailed Description

First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be modified as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Existing diesel engines are provided with a starting device and a turning gear, respectively, for performing a turning operation and a starting operation, respectively. The starting device is fixed on a flywheel shell of the diesel engine, and when starting operation is needed, a starting gear of the starting device penetrates through the flywheel shell to enter the inside of the engine body to be meshed with a gear ring of the shafting, so that the shafting is driven to rotate rapidly. The barring device is detachably connected with the flywheel shell, and when barring is needed, the barring device is assembled to enable the barring gear to be meshed with the shafting gear ring to drive the shafting to rotate at a low speed. However, the turning operation and the starting operation are performed by two separate devices, respectively, and the diesel engine requires a large installation space.

Through repeated thinking and verification, the inventor finds that the structure of the barring gear is approximately the same as that of the starting device, the difference is that the rotating speeds of the motors driving the barring gear and the starting device to rotate are different, and if one set of device is arranged, the rotating speed of the motor can be changed, so that the device can be used for barring and starting operations, namely, the shaft system is driven to rotate quickly to start the operation when the motor rotates at a high speed; when the motor rotates at a low speed, the shaft system is driven to rotate at a low speed for turning. Therefore, one set of device is saved, and the installation space of the diesel engine is further reduced.

In view of the above, the inventor designs a starting device for a barring gear, which comprises a variable frequency motor, a speed reducing mechanism, an output gear, a power output mechanism and a controller. The input shaft of the speed reducing motor is in transmission connection with the output shaft of the variable frequency motor. The output gear is used for being meshed with a gear ring of a shafting of the engine. The input end of the power output mechanism is in transmission connection with the output end of the speed reducing mechanism, and the output end of the power output mechanism is fixedly connected with the output gear and used for driving the output gear to move between a first position and a second position along the axial direction of the output gear. The output gear is engaged with the ring gear when in the first position and the output gear is disengaged from the ring gear when in the second position. The controller is in communication connection with the variable frequency motor, and controls the variable frequency motor to rotate at a low speed when the controller receives a turning signal and controls the variable frequency motor to rotate at a high speed when the controller receives a starting signal. In this way, the controller can be used to control the rotation speed of the inverter motor, which can be used for starting operation when the inverter motor rotates at a high speed and for turning operation when the inverter motor rotates at a low speed. The same set of device is used for turning or starting operation, so that the installation space of the diesel engine is saved.

Example one

Fig. 1 is a schematic structural diagram of the barring starting device provided in this embodiment, and fig. 2 is a schematic circuit diagram of the barring starting device provided in this embodiment. As shown in fig. 1-2, the turning starting device provided by the present embodiment includes an inverter motor 1, a speed reduction mechanism 2, a power output mechanism 4, and an output gear 3. The rotating speed of the variable frequency motor 1 is controlled by the current frequency input into the variable frequency motor 1, namely, the output shaft of the variable frequency motor 1 can rotate at high speed when the variable frequency motor 1 inputs high-frequency current; when the variable frequency motor 1 inputs low-frequency current, the output shaft of the variable frequency motor 1 can rotate at low speed. Illustratively, the inverter motor 1 includes an inverter 11 and a motor 12, the motor 12 is used for providing output torque, and the inverter 11 is electrically connected with the motor 12 and used for controlling the current frequency input to the motor 12. The specific structure of the inverter motor 1 is not limited in this embodiment, and those skilled in the art can select a suitable inverter motor 1 structure according to actual needs and also can select the existing inverter motor 1 on the market.

The inverter motor 1 is communicatively connected to the controller 5, that is, the inverter motor 1 may be electrically connected to the controller 5 by wire or may be connected to the controller 5 by wireless signals, and specifically, the controller 5 is communicatively connected to the inverter 11 of the inverter motor 1. When the controller 5 receives the turning signal, the variable frequency motor 1 is controlled to rotate at a low speed; when the controller 5 receives the starting signal, the variable frequency motor 1 is controlled to rotate at a high speed. It is easy to understand that the variable frequency motor 1 can be used for driving the barring starting device to carry out barring operation when rotating at a high speed; the variable frequency motor 1 can be used for driving the turning gear starting device to start when rotating at a low speed. The specific rotation speed of the inverter motor 1 during high-speed rotation and low-speed rotation is well known to those skilled in the art, and the specific rotation speed of the inverter motor 1 during high-speed rotation and low-speed rotation is not limited in this embodiment.

As shown in fig. 2, the signal input terminal of the controller 5, i.e., the left end of the controller 5, is connected in series with the turning line 51 and the starting line 52, wherein the turning line 51 is arranged in parallel with the starting line 52. As will be readily understood, the barring line 51 is used to input a barring signal to the controller 5, and the start line 52 is used to input a start signal to the controller 5.

The controller 5 controls the variable frequency motor 1 to rotate at a low speed in response to the turning signal, namely when the turning signal is input to the controller 5 by the turning line 51, the controller 5 controls the variable frequency motor 1 to rotate at a low speed; the controller 5 controls the inverter motor 1 to rotate at a high speed in real time in response to the start signal, that is, when the start signal is input to the controller 5 by the start line 52, the controller 5. The present embodiment is not limited to the kind of the controller 5, and for example, a PLC controller may be used to control the rotation speed of the inverter motor 1.

As will be understood by those skilled in the art, the signal input of the controller 5 is connected in series with the barring line 51 and the starting line 52, and the barring signal and the starting signal are input to the controller 5 through the barring line 51 and the starting line 52, respectively. Therefore, when the controller 5 receives the turning signal, the variable frequency motor 1 is controlled to rotate at a low speed for turning; when the controller 5 receives the starting signal, the variable frequency motor 1 is controlled to rotate at a high speed to perform barring, and a person skilled in the art can control the working state of the barring starting device only by controlling the type of the signal input by the controller 5.

Specifically, as shown in fig. 2, the barring line 51 is provided with a barring switch 511 for triggering a barring signal, that is, when the barring switch 511 is closed, the barring line 51 is in a connected state, transmitting the barring signal; when the barring switch 511 is turned off, the barring line 51 is in an off state. The starting circuit 52 is provided with a starting switch 521 for triggering a starting signal, namely when the starting switch 521 is closed, the starting circuit 52 is in a communication state and transmits the starting signal; when the starter switch 521 is off, the starter line 52 is in an off state. The present embodiment is not limited to a specific structure of the turning gear switch 511 and the start switch 521, and for example, a suitable type of switch such as a jog switch or a push switch may be used as the turning gear switch 511 and the start switch 521.

As can be understood by those skilled in the art, by providing the barring gear switch 511 on the barring gear circuit 51 and providing the starting switch 521 on the starting circuit 52, those skilled in the art can control the communication state between the barring gear circuit 51 and the starting circuit 52 by controlling the on/off states of the barring gear switch 511 and the starting switch 521, and further control the input of the barring signal or the starting signal to the controller 5.

Preferably, as shown in fig. 2, the barring line 51 is provided with a first coil 512, and the starting line 52 is provided with a first contact set 522. The first contact set 522 includes a first movable contact and a first stationary contact, which may be in contact with or separate from the first stationary contact. The first coil 512 generates a magnetic force in the energized state to attract the first movable contact so as to separate the first movable contact from the first stationary contact, thereby placing the starting circuit 52 in the open circuit state. For example, the relay may be used to open the starting line 52 when the barring line 51 is connected, that is, the relay internal coil is used as the first coil 512, and the contact of the relay is used as the first movable contact and the first stationary contact.

Accordingly, fig. 2 shows that the starting line 52 is provided with a second coil 523, the barring line 51 is provided with a second set of contacts 513, the second set of contacts 513 comprising a second movable contact and a second stationary contact. The second coil 523 can generate magnetic force to attract the second movable contact in the energized state, so that the second movable contact is separated from the second fixed contact, and the barring line 51 is in an open circuit state. It is easily understood that it is also possible to realize the other barring wire 51 in the open state when the starting wire 52 is connected, using the relay internal coil as the second coil 523 and using the contact of the relay as the second movable contact and the second stationary contact, using the relay.

As will be understood by those skilled in the art, providing the first coil 512 on the barring line 51 and the first set of contacts 522 on the starting line 52 ensures that the starting line 52 is in the open state when the barring switch 511 is closed, i.e. the barring line 51 is in the on state; providing the second coil 523 on the start line 52 and the second set of contacts 513 on the barring line 51 may ensure that the start line 52 is in a connected state and the barring line 51 is in a disconnected state. The turning gear switch 511 and the start switch 521 can be prevented from being closed at the same time by the above arrangement, and it is ensured that the controller 5 can input only one signal at the same time.

With continued reference to fig. 2, the barring gear starting device provided in this embodiment further includes a control power supply 53 and an operation switch 54, and the control power supply 53 is configured to supply power to the barring line 51 and the starting line 52. Illustratively, the control circuit is further provided with a main line, one end of the main line is connected with a control power supply 53 in series, and the other end of the main line is connected with the turning gear line 51 and the starting line 52 in series, and the control power supply 53 supplies power to the main line so as to supply power to the turning gear line 51 and the starting line 52. One possible implementation is that the operation switch 54 is disposed on the main line to control the connection state of the main line, and thus control the power supply state of the barring line 51 and the starting line 52.

It can be understood by those skilled in the art that the control power source 53 is provided to supply power to the barring line 51 and the starting line 52, and the operation switch 54 is provided, that is, those skilled in the art can control the operating state of the barring starting device by controlling the on/off state of the operation switch 54, and when an accident occurs, the emergency stop operation is performed by turning off the operation switch 54.

Fig. 2 shows that the barring starting device provided by the embodiment further includes a storage battery 55, and the storage battery 55 is electrically connected with the inverter motor 1, specifically, the storage battery 55 is electrically connected with the inverter 11 of the inverter motor 1, and is used for supplying power to the inverter motor 1. The specific structure of the battery 55 is not limited in this embodiment, and those skilled in the art can set the configuration according to actual needs. It is easy to understand that the storage battery 55 is used for providing energy for the inverter motor 1, and the inverter motor 1 can be ensured to run stably.

One possible implementation is that the reduction mechanism 2 includes a first reduction gear, a second reduction gear, an input shaft, and an output shaft. The first reduction gear and the second reduction gear are meshed with each other, and the number of teeth of the first reduction gear is smaller than that of the teeth of the second reduction gear. The specific number of teeth of the first reduction gear and the second reduction gear is not limited in this embodiment, and those skilled in the art can determine the number according to the output rotation speed of the inverter motor 1 and the rotation speed of the engine shafting gear ring.

Exemplarily, the first reduction gear is fixedly connected with the input shaft of the reduction mechanism 2 and the first reduction gear is disposed coaxially with the input shaft. The second reduction gear is fixedly connected with the output shaft of the reduction mechanism 2 and is coaxially arranged with the output shaft. The input shaft is fixedly connected with the output shaft of the variable frequency motor 1, and for example, the input shaft of the speed reducing mechanism 2 and the output shaft of the variable frequency motor 1 can be connected through a coupler.

As will be understood by those skilled in the art, the speed reduction mechanism 2 can reduce the rotation speed output by the inverter motor 1, thereby increasing the output torque of the inverter motor 1. The reduction mechanism 2 is ensured to be able to provide a stable gear ratio by providing the first reduction gear and the second reduction gear that mesh with each other inside the reduction mechanism 2 and by the number of teeth of the first reduction gear being smaller than the number of teeth of the second reduction gear.

Fig. 3 is a sectional view of the barring gear starting device according to the present embodiment. As shown in fig. 3, the power output mechanism 4 provided in this embodiment includes a pull rod 41, a fork seat 42, a fork 43, a transmission shaft 44 and a housing 45, wherein the housing 45 may be a separate housing 45 of the power output mechanism 4 or an integral housing 45 of the barring gear starting device.

One end of the transmission shaft 44 is in transmission connection with the output shaft of the speed reducing mechanism 2, the other end of the transmission shaft 44 is fixedly connected with the output gear 3, namely as shown in fig. 3, and the left end of the transmission shaft 44 is in transmission connection with the output shaft of the speed reducing mechanism 2. For example, the transmission shaft 44 and the output shaft of the speed reducing mechanism 2 may be connected by a bushing, so that the transmission shaft 44 and the output shaft of the speed reducing mechanism 2 can rotate synchronously, and the bushing is connected with the transmission shaft 44 by a sliding groove, so that the transmission shaft 44 can reciprocate along the axial direction of the transmission shaft 44. The right end of the transmission shaft 44 and the output gear 3 can be connected through a key, and the transmission shaft 44 and the output gear 3 are coaxially arranged, that is, when the transmission shaft 44 reciprocates along the axial direction of the transmission shaft 44, the transmission shaft 44 can drive the output gear 3 to move between a first position and a second position along the axial direction of the output gear 3, where the first position is a limit position where the output gear 3 moves to the right, and the second position is a limit position where the output gear 3 moves to the left. When the output gear 3 is located at the first position, the output gear 3 is meshed with a gear ring of a shafting; when the output gear 3 is located at the second position, the output gear 3 is separated from the ring gear.

It can be understood by those skilled in the art that by providing the power output mechanism 4, the output gear 3 is driven to rotate synchronously by the transmission shaft 44 of the power output mechanism 4, and at the same time, the transmission shaft 44 can also drive the output gear 3 to move between the first position and the second position along the axial direction of the output gear 3. Namely, the output gear 3 is meshed with the gear ring of the shafting when the barring starting device works, and the output gear 3 is separated from the gear ring of the shafting after the completion of the work, so that the influence of the output gear 3 on the normal rotation of the gear ring of the shafting after the completion of the starting work is avoided.

As shown in fig. 3, the fork 42 is formed in a long bar shape having a length direction parallel to the axial direction of the driving shaft 44. The left end of the strip-shaped structure, i.e. the first end, is fixedly connected with the inner wall of the shell 45, and the right end of the strip-shaped structure, i.e. the second end, is hinged with the shifting fork 43. So that the yoke 43 can rotate about the hinge point with the yoke seat 42.

The top end, i.e., the first end, of the fork 43 is connected to the right end, i.e., the first end, of the pull rod 41, and the fork 43 is connected to the pull rod 41 through a shaft pin, and the bottom end, i.e., the second end, of the fork 43 is connected to the transmission shaft 44. It is easy to understand that the rotation of the fork 43 around the hinge point with the fork seat 42 can move the transmission shaft 44 left and right.

The axial direction of the tie rod 41 is parallel to the axial direction of the transmission shaft 44, and the tie rod 41 is movable left and right in the axial direction of the tie rod 41. The pull rod 41 acts along the axial direction of the pull rod 41 to drive the shifting fork 43 to rotate around the hinge point with the shifting fork seat 42, and then the transmission shaft 44 is driven to move left and right along the axial direction of the transmission shaft 44.

In one possible implementation, as shown in fig. 3, a housing 45 encloses a mounting cavity 451 at a position near an upper side of the power output mechanism 4, and an inner wall of the mounting cavity 451 is used for fixing the electromagnetic switch 46, and it is easily understood that the electromagnetic switch 46 generates a magnetic force in an energized state and disappears in a de-energized state. The electromagnetic switch 46 is provided outside the left end, i.e., the second end, of the pull rod 41, for example, the electromagnetic switch 46 may be provided in a cylindrical structure that is sleeved outside the left end of the pull rod 41, and the electromagnetic switch 46 draws the pull rod 41 to move leftward in the axial direction of the pull rod 41 in the energized state.

Fig. 3 shows that the pull rod 41 is provided with a limiting portion 411 protruding outwards from the side wall of the pull rod 41, the limiting portion 411 is arranged at a right end, namely a first end, close to the pull rod 41, the outer side of the pull rod 41 is sleeved with a spring 412, one end of the spring 412 abuts against the limiting portion 411, and the other end of the spring 412 abuts against the outer wall of the installation cavity 451.

As can be understood by those skilled in the art, the electromagnetic switch 46 is sleeved outside the second end of the pull rod 41, the electromagnetic switch 46 is fixed inside the installation cavity 451, the position close to the first end of the pull rod 41 is provided with the limiting portion 411, the outer side of the pull rod 41 is further sleeved with the spring 412, one end of the spring 412 abuts against the outer wall of the installation cavity 451, and the other end of the spring abuts against the limiting portion 411. When the electromagnetic switch 46 is energized, magnetic force is generated to attract the pull rod 41 to move leftwards and simultaneously compress the spring 412, and when the electromagnetic switch 46 is de-energized, the magnetic force disappears, and the pull rod 41 moves rightwards under the action of the elastic force of the spring 412. The magnetic force generated by the electromagnetic switch 46 and the elastic force of the spring 412 are used to drive the pull rod 41 to move left and right, so as to drive the transmission shaft 44 to drive the output gear 3 to move between the first position and the second position along the axial direction of the output gear 3.

In this embodiment, the turning starting device controls the rotation speed of the variable frequency motor by the controller, and the turning starting device can perform starting operation when the variable frequency motor rotates at a high speed and perform turning operation when the variable frequency motor rotates at a low speed. The speed reducing mechanism is used for reducing the output rotating speed of the variable frequency motor, the power output mechanism is used for driving the output gear to move between a first position and a second position along the axis direction of the output gear, and the output gear is meshed with a gear ring of the shafting when in the first position and is separated from the gear ring of the shafting when in the second position. Thus, the barring starting device can carry out two operations of barring and starting, and further saves the installation space of the diesel engine.

Example two

On the basis of the first embodiment, the present embodiment further provides a diesel engine, which includes an engine body, a flywheel housing and the barring starting device of the first embodiment. The engine body and the barring starting device are respectively located on two opposite sides of the flywheel housing and fixedly connected with the flywheel housing.

An output gear of the barring starting device can penetrate through the flywheel shell to be meshed with a gear ring of a shaft system in the engine body. The barring starting device in this embodiment has the same structure as the barring starting device provided in the first embodiment, and can bring about the same or similar technical effects, and details are not repeated here, and specific reference may be made to the description of the above embodiment.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if present), and the like, are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A starting device for a barring gear, comprising:

a variable frequency motor;

2. The barring starting device according to claim 1 wherein a signal input of the controller is connected in series with a barring line and a starting line, the barring line being arranged in parallel with the starting line, the barring line being configured to input the barring signal to the controller, the starting line being configured to input the starting signal to the controller;

3. The barring starting device according to claim 2, characterised in that the barring line is provided with a barring switch for triggering a barring signal, the starting line being provided with a starting switch for triggering a starting signal.

4. The jigger starting device as claimed in claim 3, wherein the jigger circuit is provided with a first coil, the starting circuit is provided with a first contact group including a first movable contact and a first stationary contact, and the first coil is adapted to generate a magnetic force to attract the first movable contact in an energized state to separate the first movable contact from the first stationary contact;

5. The barring starting device according to claim 4 further comprising a control power source for supplying power to the barring line and the starting line and an operation switch for controlling a power supply state of the control power source.

6. The jigger starting device according to claim 5, further comprising a storage battery electrically connected to the inverter motor for supplying power to the inverter motor.

7. The jigger starting device according to any one of claims 1 to 6, wherein the reduction mechanism includes a first reduction gear, a second reduction gear, an input shaft, and an output shaft;

8. The jigger starting device according to any one of claims 1 to 6, wherein the power take-off mechanism includes a pull rod, a yoke seat, a yoke, a transmission shaft, and a housing;

9. The jigger starting device according to claim 8, further comprising an electromagnetic switch,

10. A diesel engine comprising an engine block, a flywheel housing and a barring gear starting apparatus according to any one of claims 1 to 9;