CN104802116B - Self-elevating platform motor torque pre-loading device and loading and detecting method - Google Patents

Abstract

The invention provides a motor torque preloading device of a self-elevating platform, and a method for respectively performing torque preloading and preloading torque detection by using the motor torque preloading device. The motor torque preloading device includes a torque wrench, an operating handle and a motor connector; the torque wrench has a torque loading end and a torque output end, and is provided with a display unit for displaying the torque value; the operating handle is connected to the torque loading end of the torque wrench; One end of the motor connector is adaptively connected to the torque output end of the torque wrench and can be driven to rotate by the torque wrench, and the other end of the motor connector is provided with a connecting portion for connecting the motor output shaft. The invention overcomes the defects of the traditional pile leg lifting control system in terms of torsion loading and detection, reduces the risk of damage to the lifting device due to instantaneous impact force, and makes the lifting operation safer and faster. At the same time, the device is simple to manufacture, convenient to operate and high in practicability.

Description

Motor torque preloading device and loading and detection method of self-elevating platform

technical field

The invention relates to the field of marine engineering equipment construction, in particular to a motor torque preloading device of a self-elevating platform, and a method for respectively performing torque preloading and preloading torque detection by using the motor torque preloading device.

Background technique

For the traditional jack-up drilling platform leg lifting and locking system, the control system lacks the torque preload function of the lifting motor. During the leg lifting process, the torque is transferred from the locking system to the lifting system, which will The instantaneous impact force generated by the lifting motor can easily cause serious damage to the lifting motor and related accessories, thereby affecting the commissioning progress of the drilling platform, and even affecting the overall delivery of the platform in serious cases, causing huge property losses to the shipyard.

For some upgraded leg lifting control systems, although the preloading function has been added, in order to ensure the safety of the lifting operation, it is also necessary to detect the loaded moment to verify the accuracy of the preloading and avoid causing the lifting Severe damage to the motor and related accessories.

Contents of the invention

The object of the present invention is to provide a motor torque preloading device for a self-elevating platform, and provide methods for preloading and preloading torque detection using the motor torque preloading device respectively, so as to overcome the traditional leg lifting control system in the torque Defects in loading and detection can avoid the phenomenon that the lifting device is damaged due to instantaneous impact force.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

According to one aspect of the present invention, the present invention provides a motor torque preloading device for a self-elevating platform, including a torque wrench, an operating handle and a motor connector; the torque wrench has a torque loading end and a torque output end, and is provided with a display The display unit of the torque value; the operating handle is connected to the torque loading end of the torque wrench; one end of the motor connector is adaptively connected to the torque output end of the torque wrench and can be driven and rotated by the torque wrench, and the other end of the motor connector is provided for connecting Connecting part of motor output shaft.

Preferably, the operating handle, the motor connector and the torque wrench are all detachably connected.

Preferably, the operating handle is detachably connected to the torque wrench through a pipe hanger; the pipe hanger includes two clamping parts, and the two clamping parts are detachably connected and fixed by fasteners; the torque The torque loading end of the wrench is clamped between the two clamping parts, and the operating handle is fixedly connected with one of the clamping parts.

Preferably, the two clamping pieces have a symmetrical structure, and the shape of the clamping piece is in the shape of a rectangular block with openings on its sides; the openings of the two clamping pieces are opposite to each other, so as to clamp the torque loading end of the torque wrench.

Preferably, the operating handle is perpendicular to the torque wrench.

Preferably, the connecting part includes a shaft sleeve, and the shaft sleeve is provided with key grooves for fixed connection with the motor output shaft.

According to another aspect of the present invention, the present invention provides a motor torque preloading method of a self-elevating platform, the self-elevating platform includes a leg with a rack, a gear meshing with the rack, and A motor used to drive the gear to rotate to drive the legs up and down; the motor torque preloading method uses the motor torque preloading device as described above to preload the motor torque; the motor torque preloading method includes: Before lifting and lowering the legs, load the torque of the torque wrench to the set value through the operating handle, so that the motor connector is fixedly connected with the output shaft of the motor, so that the torque of the torque wrench is loaded to the output of the motor through the motor connector On the shaft; the set value is not less than the torque value of the gear feedback to the motor output shaft when the legs are lifted and lowered.

Preferably, before applying torque to the motor through the motor connection head, the step of inspecting the motor and releasing the pressure of the motor is also included.

According to still another aspect of the present invention, the present invention provides a motor preload torque detection method of a self-elevating platform, the self-elevating platform includes a leg with a rack, and a gear meshed with the rack, And the motor used to drive the gear to rotate to drive the leg up and down; before the leg is lifted up and down, the motor is preloaded with torque through its own preloading function; the motor preload torque detection method adopts the above method The motor torque preloading device described above; the method includes: fixedly connecting the motor connector with the output shaft of the motor, displaying the magnitude of the preloaded torque of the motor through the display unit, and judging the preloaded torque accordingly Whether the loading torque meets the requirements.

Preferably, the method further includes: when it is detected that the preload torque of the motor does not meet the requirements, load the torque of the torque wrench to a value that meets the requirements through the operating handle, and load the torque of the torque wrench through the motor connector to the output shaft of the motor.

It can be seen from the above technical solution that the advantages and positive effects of the present invention are: the motor torque preloading device provided by the present invention can preload the lifting motor of the self-elevating platform, which greatly reduces the damage caused by the instantaneous impact force of the lifting device. The risk of damage is reduced, making the lifting operation of the legs of the jack-up platform safer and faster. At the same time, the device is simple to manufacture, easy to operate, and highly practical, which is of great significance to the debugging of the self-elevating platform.

Description of drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a motor torque preloading device of the present invention.

Fig. 2 is a structural sectional view of a preferred embodiment of the motor torque preloading device of the present invention.

Fig. 3 is a schematic diagram of the use state of the preferred embodiment of the motor torque preloading device of the present invention.

Reference signs are explained as follows: 1. Motor torque preloading device; 11. Torque wrench; 111. Torque loading end; 112. Torque output end; 113. Display unit; 12. Operating handle; 13. Motor connector; 131. Connection Rod; 132, connecting part; 14, pipe hanger; 141, clamping part; 142, clamping part; 143, fastener; 2, motor; 21, output shaft; 3, transmission mechanism; 4, gear.

detailed description

Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various changes in different embodiments without departing from the scope of the present invention, and that the description and illustrations therein are illustrative in nature and not limiting. this invention.

The self-elevating platform includes a main hull and legs that can be lifted relative to the main hull, and the main hull is equipped with a lifting device that cooperates with the legs to realize lifting. Among them, in the more common jack-up platforms, the pile legs adopt a truss structure, and racks are arranged on it. The lifting device is correspondingly provided with a gear that can fit and mesh with the rack of the pile leg, and the gear is driven to rotate by the lifting motor, thereby driving the rack to lift.

The purpose of the present invention is to provide a motor torque preloading device applied to this self-elevating platform. Perform torque (moment) preloading operation to transfer the weight of the platform body to the rack and pinion, so that after the locking device is loosened, the elevating rack and pinion and the motor can be effectively prevented from being damaged due to the impact of instantaneous force . After the preloading is completed, the normal leg lifting operation is carried out.

1 and 2 illustrate the structure of a preferred embodiment of the motor torque preloading device of the present invention. The motor torque preloading device 1 mainly includes a torque wrench 11 , an operating handle 12 , a motor connector 13 and a pipe hanger 14 .

The torque wrench 11 has a torque loading end 111 and a torque output end 112, and is provided with a display unit 113 for displaying the torque value. The display unit 113 illustrated in this embodiment is a dial pointer type, and in other embodiments, it may also be a digital type. The principle and structure of the torque wrench 11 can refer to the existing torque wrench, and no specific introduction will be made here.

The operating handle 12 is detachably connected to the torque loading end 111 of the torque wrench 11 through the pipe hanger 14 for the user to apply torque to the torque wrench 11 . The operating handle 12 is perpendicular to the torque wrench 11, which can save more effort.

The motor connector 13 includes a connecting rod 131. One end of the connecting rod 131 is adapted to connect with the torque output end 112 of the torque wrench 11 and can be driven and rotated by the torque wrench 11. The other end of the connecting rod 131 is provided with a connecting part 132 for connecting the motor output shaft. .

As shown in FIG. 2 , the structure of the end of the connecting rod 131 connected to the torque wrench 11 depends on the structure of the torque output end 112 of the torque wrench 11 , for example, it may be a spline structure. The connecting rod 131 is detachably connected with the torque wrench 11, which is convenient for assembly and disassembly.

The specific structure of the connecting part 132 can be determined according to the structure of the motor. In this embodiment, the connecting part 132 includes a shaft sleeve, which can be sleeved on the output shaft of the motor. The output shaft is fixedly connected.

Pipe hanger 14 is a Tc type pipe hanger, and it comprises two clamping parts 141,142, and two clamping parts 141,142 are symmetrical structures, and profile is rectangular block, and side is provided with opening, and clamping part 141 , 142 form a U-shaped structure. The openings of the two clamping parts 141 , 142 are opposite to each other, so as to clamp the torque loading end 111 of the torque wrench 11 . The two clamping parts 141 , 142 are respectively provided with matching installation holes on both sides of the opening, and are detachably connected by fastening parts 143 composed of bolts and matching nuts.

The operating handle 12 is fixedly connected to the clamping member 142 by means of welding, bonding, etc., so as to form a detachable connection with the torque wrench 11 .

The structural form of the pipe hanger 14 is not limited to the structure shown in the figure, as long as it forms a detachable connection with the torque wrench 11 . The connection between the operating handle 12 and the torque wrench 11 is not limited to only using the pipe hanger 14 for connection.

The motor torque preloading device 1 applies torque to the torque wrench 11 through the operating handle 12, and the torque of the torque wrench 11 is transmitted to the motor through the motor connector 13, so that the torque preload can be performed on the motor of the self-elevating platform, greatly reducing Risk of damage to lifting devices due to momentary impact forces.

Further, in this embodiment, each part of the structural parts is detachably connected. When not in use, it can be disassembled and placed, which saves space and is convenient for storage; and the operating handle 12 and the motor connector 13 can be matched with different specifications. Torque wrench 11 meets different needs and is more flexible to use.

According to the above-mentioned motor torque preloading device 1 , the present invention further provides a motor torque preloading method and a motor preloading torque detection method of the self-elevating platform respectively. Among them, the motor torque preloading method is suitable for the self-elevating platform with no preloading function in the leg lifting electric control system to preload the motor; the motor preloading torque detection method is suitable for the leg lifting electric control system with preloading function. The self-elevating platform with loading function is used to detect the torque of the motor after the torque has been preloaded.

In these two methods, the motor torque preloading device 1 is connected to the motor 2 in the same way. As shown in FIG. 3 , the motor 2 is connected to the gear 4 through the transmission mechanism 3 to drive the gear 4 to rotate. The motor connection head 13 of the motor torque preloading device 1 is fixedly connected with the output shaft 21 of the motor 2 .

The motor torque preloading method is specifically as follows: before lifting and lowering the legs, load the torque of the torque wrench 11 to the set value through the operating handle 12, so that the motor connector 13 is fixedly connected with the output shaft 21 of the motor 2, so that the torque wrench The torque of 11 is loaded onto the output shaft 21 of the motor 2 through the motor connection head 13; the set value is not less than the torque value fed back from the gear 4 to the output shaft 21 of the motor 2 when the legs are raised and lowered.

The actual steps are roughly as follows:

1. Calculation of lifting motor torque W;

1. Calculate the gear index circle diameter D:

Its calculation formula is:

Among them: M is the gear module, P is the tooth pitch, and Z is the number of teeth.

2. Calculate the torque W fed back to the motor end after the output end of the lifting device passes through the transmission mechanism (that is, the torque setting value to be loaded by the torque wrench):

Among them: T is the lifting weight of the output end of the lifting device; i is the gear transmission ratio; η is the efficiency of the motor, which can be inquired from the supplier's technical specifications; g is the constant of the acceleration of gravity.

2. Before lifting the pile, inspect the lifting motor according to the requirements in the equipment operation manual, and use the leg lifting electric control system to release the pressure of the lifting motor.

3. After confirming that there is no problem with the lifting device of the whole ship, remove the cover plate at the tail of the lifting motor, connect the motor torque preloading device to the drive shaft of the form frame, and then release the brake. The lifting motor is calculated according to the original plan. torque preload. The torque is calculated in this way for each lift motor of the jack-up platform and preloaded one by one.

4. After preloading, loosen the locking system to carry out the subsequent leg lifting operation.

Take the preloading operation of a jack-up platform leg lifting electric control system without the preloading function as an example:

First, query the following parameters from the supplier’s technical specifications: tooth pitch P=9.894in, number of teeth Z=7, lifting weight at the output end of the lifting device T=454000kg, gear ratio of the lifting unit i=6679, motor efficiency η=0.9 . The gravitational acceleration constant g is taken as: g=9.8m/s ² .

Gear pitch circle diameter Motor preload torque

When the motor torque preloading device 1 of the present invention is used for torque preloading, a torque of 206.36 N·m is applied to the torque wrench 11 through the operating handle 12, and the torque value can be controlled by the torque wrench 11 itself. Then, the torque of the motor 2 is preloaded to 206.36 N·m through the motor connecting head 13 .

For the self-elevating platform with the preloading function of the leg lifting electric control system, after the motor 2 has preloaded the torque through its own preloading function, in order to confirm that the torque of each motor 2 meets the requirements, the present invention can The motor torque preloading device 1 detects the preloading torque of the motor 2 .

The detection method is: fixedly connect the motor connector 13 of the motor torque preloading device 1 to the output shaft 21 of the motor 2, display the preloaded torque of the motor 2 through the display unit 113 of the torque wrench 11, and judge from this Whether the preload torque meets the requirements.

Preferably, when it is detected that the preload torque of the motor 2 does not meet the requirements, the torque of the torque wrench 11 is loaded to a value that meets the requirements through the operating handle 12, and the torque of the torque wrench 11 is loaded to the motor through the motor connector 13 2 on the output shaft 21.

The actual steps are roughly as follows:

1. Calculation of the lifting motor torque W; the calculation process can refer to the above torque preloading method.

2. Before lifting the pile, inspect the lifting motor according to the requirements in the equipment operation manual, and release the pressure of the lifting motor.

3. After confirming that there is no problem with the lifting device of the whole ship, according to the previously calculated torque, use the preload function of the legs to automatically preload the lifting motor of each leg, and then lock the brakes.

4. Remove the cover plate at the tail of the lifting motor, and use the motor torque preloading device to check whether the preloading torque at the tail of the lifting motor meets the requirements one by one. If it meets, proceed to the next step, if not, check whether there is any problem in the corresponding electric control system until the problem is eliminated, so that the preload torque of each motor meets the requirements. During this process, attention should be paid to the operation safety of personnel, and the reverse rotation of the device should be avoided to cause injury to the operator.

5. After the preloading is completed, loosen the locking system for subsequent lifting operations.

While this invention has been described with reference to several exemplary embodiments, it is understood that the terms which have been used are words of description and illustration, rather than of limitation. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope of the appended claims. , all changes and modifications falling within the scope of the claims or their equivalents shall be covered by the appended claims.

Claims (9)

1. a kind of motor torque pre-load means of jack-up unit are it is characterised in that include：

Torque spanner, it has moment loading end and moment outfan, and is provided with to show the display unit of moment values；

Operation handle, connects the moment loading end of described torque spanner；

Motor union joint, its one end adaptedly connects the moment outfan of described torque spanner and can be driven by torque spanner and turn Dynamic, the motor union joint other end is provided with to connect the connecting portion of motor output shaft；

Described operation handle passes through a pepe bridge and described torque spanner detachable connection；Described pepe bridge includes two folders Gripping member, two holders pass through the detachably connected fixation of securing member；The moment loading end of described torque spanner is located in two clampings Between part, described operation handle is fixedly connected with wherein one holder.

2. motor torque pre-load means according to claim 1 are it is characterised in that described motor union joint and described torsion It is detachable connection between torque wrench.

3. motor torque pre-load means according to claim 1 are it is characterised in that described two holders are symmetrical junction Structure, holder profile rectangular-blocklike, its side is provided with opening；The opening of two holders is relative, thus clamp described torsion pulling The moment loading end of handss.

4. the motor torque pre-load means according to any one of claim 1-3 it is characterised in that described operation handle with Described torque spanner is vertical.

5. the motor torque pre-load means according to any one of claim 1-3 are it is characterised in that described connecting portion includes One axle sleeve, and axle sleeve is provided with keyway, to be fixedly connected with described motor output shaft.

6. the motor torque pre-add support method of a kind of jack-up unit, described jack-up unit include spud leg with tooth bar and The gear that described tooth bar is meshed, and in order to drive described pinion rotation to drive the motor of described spud leg lifting；Its feature It is, this motor torque pre-add support method is carried out using the motor torque pre-load means as described in any one of claim 1-5 The prestrain of motor torque；

Described motor torque pre-add support method includes：

Before carrying out spud leg lifting, the moment of torque spanner is loaded onto by setting value by operation handle, make motor union joint with The output shaft of motor is fixedly connected, thus this moment of torque spanner is loaded onto the output of described motor by motor union joint On axle；When described setting value is not less than spud leg lifting, pinion feedback is to the torque value of motor output shaft.

7. motor torque pre-add support method according to claim 6 it is characterised in that by described motor union joint to Before described motor loading moment, also include motor is tested, and the step discharging motor pressure.

8. the motor preload force moment detection method of a kind of jack-up unit, described jack-up unit includes the stake with tooth bar The gear that lower limb is meshed with described tooth bar, and in order to drive described pinion rotation to drive the motor of described spud leg lifting；? Before carrying out spud leg lifting, described motor has carried out moment prestrain by carrying pre-loaded function；It is characterized in that, this motor is pre- Loading moment detection method is carried out using the motor torque pre-load means as described in any one of claim 1-5；

Methods described includes：

Described motor union joint is fixedly connected with the output shaft of described motor, described motor pre-add is shown by display unit The size of the moment carrying, and thus judge whether prestrain moment meets the requirements.

9. motor preload force moment detection method according to claim 8 is it is characterised in that methods described also includes：

When the prestrain moment described motor is detected is undesirable, by operation handle, the moment of torque spanner is loaded To satisfactory value, this moment of torque spanner is loaded onto on the output shaft of described motor by motor union joint.