CN111217219B - Elevator braking torque detection method and detection device - Google Patents
Elevator braking torque detection method and detection device Download PDFInfo
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- CN111217219B CN111217219B CN202010019218.7A CN202010019218A CN111217219B CN 111217219 B CN111217219 B CN 111217219B CN 202010019218 A CN202010019218 A CN 202010019218A CN 111217219 B CN111217219 B CN 111217219B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
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Abstract
The embodiment of the invention disclosesA method and a device for detecting the braking torque of an elevator are disclosed, wherein the method comprises the following steps: the data processing unit obtains detection data, wherein the detection data comprises the weight W of the elevator counterweight1And car weight W2Difference (W) between1‑W2) Moment M required by static of elevator1Moment M required by moving elevator carxAnd the maximum acceleration value a of the elevator when the brake is opened in the power-off state of the traction machine1Maximum acceleration value a of elevator in deceleration stop process when brake is closed2(ii) a And the data processing unit judges whether the braking torque of the elevator is qualified or not according to the rated load capacity Q of the elevator and the detection data. Namely, the detection method used in the embodiment of the invention is simple, convenient and safe, does not need weights, and is time-saving and labor-saving.
Description
Technical Field
The invention relates to the technical field of elevator detection, in particular to a method and a device for detecting an elevator braking torque.
Background
The elevator traction machine brake is an extremely important safety component of an elevator, and whether the working state of the elevator is normal or not is directly related to the safety and the reliability of the elevator. The situations of elevator sliding, door opening, ladder walking, top rushing, bottom rushing and the like can occur due to insufficient braking torque, and further serious personal casualty accidents are caused due to the fact that passengers are sheared and impacted. Passenger death accidents such as death caused by being clamped when Shenzhen Pengcheng hospital practice nurses take the elevators, people eating of Hangzhou Xinhuafang elevators and the like are all caused by elevator brake failure. In order to absorb the teaching and training of accident pain and avoid similar tragedies from reoccurrence, the national quality inspection bureau in 6 months in 2017 issues an elevator supervision and inspection and periodic inspection rule-traction and forced drive elevator No. 2 modification list, an item of '125% rated load capacity brake test for car loading' is added, and the brake test is specified to be carried out once every 5 years by using the elevator to verify the brake capacity (torque). The test requires that the car is loaded with 125% of rated load capacity, when the car runs at normal running speed, the motor and the brake are cut off to supply power, the brake can stop the driving main machine, and the car is not deformed or damaged obviously after the test, so that whether the braking capacity (torque) of the brake meets the requirement or not is judged.
The method needs a large number of weights and other heavy objects, the carrying is time-consuming and labor-consuming, the test cost is high, part of owners are difficult to bear, the 125% rated load capacity of the lift car belongs to an overload condition, and the following risks can be encountered in the test process: 1. possibly causing deformation of the car structure; 2. the rope head of the traction steel wire rope is loosened, and the lift car and the counterweight fall freely; 3. if the braking torque is insufficient during the test, the elevator is out of control and falls; 4. due to overload and heavy load impact in the test, the situations of misoperation damage of the safety gear, deformation damage of the guide rail, overload damage of the main machine and the electrical equipment and the like can be caused. The above risks often cause equipment loss liability dispute, so that a 125% rated load capacity braking test faces a lot of difficulties and cannot be smoothly carried out, the braking capability (torque) of the brake cannot be verified, and the safety of the elevator is difficult to guarantee.
Disclosure of Invention
In view of the above technical defects, an object of the embodiments of the present invention is to provide a method and a device for detecting an elevator braking torque.
In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a method for detecting an elevator braking torque, wherein a detection device includes a data processing unit. The detection method comprises the following steps:
the data processing unit obtains detection data, and the detection data comprises the weight W of the elevator counterweight1And car weight W2Difference (W) between1-W2) Moment M required by static of elevator1Moment M required by moving lift carxAnd the maximum acceleration value a of the elevator when the brake is opened in the power-off state of the traction machine1Maximum acceleration value a of elevator in deceleration stop process when brake is closed2；
The data processing unit judges whether the braking torque of the elevator is qualified or not according to the rated load capacity Q of the elevator and the calculation result of the detection data;
or the data processing unit can also judge whether the braking torque of the elevator is qualified or not according to the balance coefficient K of the elevator and the calculation result of the detection data.
In a preferred embodiment of the present application, the detection method is suitable for detecting the braking torque of an elevator using a gearless traction machine, the detection device further includes an acceleration detection device, and the detection method specifically includes:
obtaining the rated load capacity Q of the elevator according to the basic parameter information of the elevator;
obtaining a difference (W) between the weight of the counterweight and the weight of the car1-W2)；
When the traction machine is in a power-off state, the star-sealing circuit is disconnected and the brake is opened, the maximum acceleration value a of the elevator movement is obtained through the acceleration measuring device1；
Then the brake is closed, and the maximum acceleration value a of the elevator in the deceleration and stop process is obtained through the acceleration measuring device2；
If it is
Or, if
The elevator braking torque is qualified. K is the balance coefficient of the elevator.
In another preferred embodiment of the application, the detection method is suitable for elevator braking torque detection by using a gear traction machine, and can also be used for elevator braking torque detection by using a gearless traction machine. The detection device also comprises a torque wrench and an adapting device of the torque wrench and a reel wheel shaft (for a geared traction machine, a reel wheel of the geared traction machine is generally hollow and shaft-free, the reel wheel shaft is a driving motor shaft at the mounting position of the reel wheel when the reel wheel shaft refers to a reel vehicle, the gearless traction machine has a shaft), the torque wrench is sleeved on the adapting device of the torque wrench and the reel wheel shaft, and the detection method specifically comprises the following steps:
obtaining the rated load capacity Q of the elevator according to the basic parameter information of the elevator;
obtaining a difference (W) between the weight of the counterweight and the weight of the car1-W2)；
The method comprises the steps that a brake is opened when an elevator counterweight and a lift car are at the same height in the power-off state of a traction machine, a torque wrench applies force to the traction machine through an adapter device of the torque wrench and a pulley shaft, the torque wrench is fixed, the lift car is in a static state, and a torque value M when the lift car is in the static state is measured1；
The data processing unit is based on the difference (W)1-W2) Rated load Q and moment M1Calculating a critical value
Or the data processing unit is used for processing the elevator balance coefficient K and the moment value M according to the elevator balance coefficient K1Calculating a critical value
The brake is closed, the torque wrench applies force to the traction machine through the torque wrench and the adapter of the sheave shaft, the force application direction of the torque wrench is the direction for driving the elevator car to move upwards, the force application is gradually increased, and the moment value M at the moment is measuredx；
If at
When the lift car starts to move upwards, the braking torque of the lift is unqualified; if at
And in the process, the elevator car does not move upwards, and the braking torque of the elevator is qualified.
Or if at
When the lift car starts to move upwards, the braking torque of the lift is unqualified; if at
And in the process, the elevator car does not move upwards, and the braking torque of the elevator is qualified.
In a second aspect, an embodiment of the present invention provides an elevator braking torque detection apparatus, including a data processing unit, configured to:
obtaining measurement data including elevator counterweight weight W1And car weight W2Difference (W) between1-W2) Moment M required by static of elevator1Moment required for moving the carMxAnd the maximum acceleration value a of the elevator when the brake is opened in the power-off state of the traction machine1Maximum acceleration value a of elevator in deceleration stop process when brake is closed2；
And the data processing unit judges whether the braking torque of the elevator is qualified or not according to the rated load capacity Q of the elevator and the calculation result of the measurement data. Or the data processing unit judges whether the braking torque of the elevator is qualified or not according to the balance coefficient K of the elevator and the calculation result of the detection data.
In a preferred embodiment of the present application, the detecting device is adapted to elevator braking torque detection using a gearless traction machine, and the detecting device further includes an acceleration detecting device. Wherein, the acceleration detection device is fixed on a certain position of a car, a counterweight, a steel wire rope or a traction sheave of the elevator.
Further, if the acceleration detection device is installed on the steel wire rope on the side where the steel wire rope enters the traction sheave after the brake is opened, the distance between the acceleration detection device and the traction sheave is more than 5 meters when the brake opening test is started.
Preferably, the acceleration detection device and the data processing unit are in wireless connection for data transmission.
In another preferred embodiment of the application, the detection device is suitable for elevator braking torque detection using a geared machine, and can also be used for elevator braking torque detection using a gearless machine. The detection device also comprises a torque wrench and an adapter of the torque wrench and a reel wheel shaft (for a tractor with a gear, the reel wheel of the tractor is generally hollow and shaftless, the reel wheel shaft is a driving motor shaft at the mounting position of the reel wheel when the reel wheel is driven, and the reel wheel of the tractor without the gear is provided with a shaft), and the torque wrench is sleeved on the adapter of the torque wrench and the reel wheel shaft.
By implementing the embodiment of the invention, the braking torque of the elevator brake can be effectively detected without using weights under the condition that the elevator car is in no load, and whether the braking torque meets the requirement of the inspection gauge or not is judged. Namely, the detection method used in the embodiment of the invention is simple, convenient and safe, does not need weights, and is time-saving and labor-saving.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below.
FIG. 1 is a schematic flow chart of a method for detecting the braking torque of an elevator provided by an embodiment of the invention;
FIG. 2 is a schematic view showing the stress on the counterweight, the cage and the traction sheave when the brake is released in embodiment 1;
fig. 3 is a schematic diagram of the stress of the counterweight, the car and the traction sheave when the switch is closed in the embodiment 1;
fig. 4 is a schematic diagram of driving torque and balancing torque generated by the weight difference between the counterweight on the wheel shaft of the disc and the weight of the cage when the empty cage is static in the embodiment 2;
FIG. 5 is a schematic diagram of driving torque and balancing torque generated by the weight difference between a car and a counterweight on a wheel shaft of a disc wheel when the car loads 1.25 times of rated load in the embodiment 2;
FIG. 6 shows that in the case of the empty car in example 2, the brake is closed, and the moment M is applied to the shaft of the disk wheel in the direction of raising the car by the torque wrenchxSchematic representation of the moments.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a method for detecting an elevator braking torque according to an embodiment of the present invention mainly includes:
s101, the data processing unit acquires detection data, wherein the detection data comprises the weight W of the counterweight1And car weight W2Difference (W) between1-W2) Moment M required by static of elevator1Required for moving the carMoment MxAnd the maximum acceleration value a of the elevator when the brake is opened in the power-off state of the traction machine1Maximum acceleration value a of elevator in deceleration stop process when brake is closed2。
S102, judging whether the braking torque of the elevator is qualified or not by the data processing unit according to the rated load capacity Q of the elevator and the calculation result of the detection data; or the data processing unit judges whether the braking torque of the elevator is qualified or not according to the balance coefficient K of the elevator and the calculation result of the detection data.
It should be noted that the elevator braking torque detection method provided by the invention mainly aims at two different types of traction machines. The first is a gearless traction machine (without a speed reducer) whose practical use is comparatively large and which is on increasing trend. The gearless tractor is not provided with a speed reducer. When the lift car is in no load, the brake is opened, the frictional resistance is extremely low, and the motion acceleration of the lift car is large. Therefore, the gearless traction machine generally requires that a star sealing circuit is connected after power failure so as to prevent the overspeed phenomenon after the brake is opened.
The second type is a gear tractor (with a speed reducer), which is mostly used for goods elevator, has smaller actual usage ratio and is in descending trend. The geared traction machine generally uses a worm gear speed reducer, and the speed reducer has large running resistance. When the car is unloaded, open the stopper, because the speed reducer resistance is great, car motion acceleration is less.
The above detection method will be described in detail by different embodiments.
Embodiment 1 (gearless traction machine elevator)
When the detection method is suitable for detecting the braking torque of the elevator by adopting the gearless traction machine, the detection device comprises an acceleration detection device and a data processing unit. The acceleration detection device can be fixed at a certain position of a car, a counterweight, a steel wire rope and a traction sheave of the elevator, the data processing unit is communicated with the acceleration detection device to process the detection data of the acceleration detection device and judge whether the braking torque meets the safe operation requirement of the elevator (meets the requirement of a detection rule) and display the braking torque.
Further, the field conditions for example 1 were: parts such as elevator guide rails are well lubricated, and when the test began, the elevator counter weight and the car were at roughly the same height, and the car was slightly lower (0.5 ~ 1 meter) than counter weight, and the car was slightly higher (0.5 ~ 1 meter) than counter weight after the experiment ended. The height difference between the counterweight and the lift car is as small as possible, so that errors caused by the weight difference between the steel wire ropes and the compensating ropes on the side of the lift car and the side of the counterweight are reduced. The acceleration detecting device is preferably fixed to one of the wire ropes and installed on the side of the wire rope away from the traction wheel after the brake is opened, so as to prevent the traction wheel from crushing the acceleration detecting device. And if the acceleration detection device is arranged on the steel wire rope at the side where the steel wire rope enters the traction sheave after the brake is opened, the distance between the installation position of the acceleration detection device and the traction sheave is more than 5 meters when the brake opening test is started. In addition, the acceleration detection device is wirelessly connected with the data processing unit, and automatically sends data to the data processing unit.
Further, the detection method comprises the following steps:
(1) an acceleration detection device is arranged on a car, a counterweight, a steel wire rope or a traction sheave of the elevator, and only one acceleration detection device is needed to be arranged at any position of the positions.
(2) The elevator tractor is powered off, the tractor star sealing circuit is disconnected, the elevator brake is completely opened, the elevator slides in an accelerating way, and the acceleration detection device measures the maximum acceleration value a at the moment1。
(3) Then the brake is closed, the elevator is braked, the elevator is decelerated and stopped, and the acceleration detection device measures the maximum acceleration value a in the process2。
(4) The weight difference (W) between the counterweight and the cage1-W2) The rated load capacity Q of the elevator is input into a data processing unit,
the braking torque of the elevator is qualified. Therefore, whether the braking torque meets the requirement can be judged. Or only inputting the elevator balance coefficient K to the data processing unit, then
The braking torque of the elevator is qualified。
Further, the specific calculation method involved in this embodiment is as follows:
wherein, the parameters involved mainly include:
when the car and the counterweight are at the same height, the lengths of the steel wire ropes on the counterweight side and the car side are equal, and the lengths of the compensation chains are also equal. Namely the sum of the mass of the steel wire rope on the counterweight side and the mass of the compensating chain is WSThe sum of the mass of the steel wire rope on the car side and the mass of the compensation chain is WS。
WS: when the car and the counterweight are at the same height, the sum of the quality of the steel wire rope at the counterweight (car) side and the quality of the compensation chain
W1Z: counterweight side total mass (weight of steel wire rope at the side + weight of compensation chain at the side + counterweight mass)
W2Z: car side total mass (weight of steel wire rope at the side + weight of compensation chain at the side + weight of car)
W1: to the total weight of the counterweight
W2: total mass of cage
J: converted to moment of inertia of traction sheave
FT1: tension of steel wire rope to counterweight during brake release
FT2: the cage is under the tension of the steel wire rope when the brake is released
FT3: the heavy side of the traction wheel receives the steel wire rope tension when the brake is released
FT4: the car side of the traction sheave is pulled by the steel wire rope when the brake is released
F＇T1: the braking process is to the heavy wire rope pulling force during closing
F＇T2: steel wire rope tension borne by car in braking process during closing
F＇T3: steel wire rope tension applied to heavy side of traction wheel pair in brake process during closing
F＇T4: the traction sheave car side is under the steel wire rope tension in the braking process during closing
a1: maximum value of acceleration value of tangential direction line of counterweight downward traction wheel during brake release (complete brake release)
a2: maximum value (maximum braking force state) g of linear acceleration value of a traction wheel in the tangential direction in the closing braking process: acceleration of gravity
R: radius of pitch circle of traction sheave
M: braking torque
Q: rated load capacity of elevator
K: coefficient of balance of elevator
Referring to fig. 2 of the drawings, a schematic diagram of a display device,
when the brake is released: w1Z·g－FT1＝W1Z·a1 FT1＝W1Z·g－W1Z·a1
FT2-W2Z·g＝W2Z·a1 FT2＝W2Z·g+W2Z·a1
FT1－FT2＝(W1Z－W2Z)g－(W1Z+W2Z)a1 (1)
FT1＝FT3
FT2＝FT4
Referring to fig. 3 of the drawings, a drawing,
when closing the switch: fT1－W1Z·g＝W1Z·a2 F＇T1＝W1Z·g+W1Z·a2
W2Z·g－F＇T2＝W2Z·a2 F＇T2＝W2Z·g－W2Z·a2
F＇T2－F＇T1＝(W2Z－W1Z)g－(W1Z+W2Z)a2 (3)
F＇T1＝F＇T3
F＇T2＝F＇T4
(2) Obtaining (4):
substitution (1) (3)
The elevator can be reliably stopped when the elevator is subjected to 125% rated load brake test by the inspection gauge, and the brake torque is qualified at the moment. At the moment, the heavy side mass W of the traction wheel pair1ZSide mass W of car2Z+ 1.25Q. Mass difference of both sides is W2Z+1.25Q-W1Z. I.e. the braking torque of the brake must be greater than the torque produced by this mass difference, and the elevator can be reliably stopped. From this it follows
M＞(W2Z+1.25Q-W1Z) gR is
When the counterweight and the cage are at the same height
W1Z＝W1+WS W2Z＝W2+WS
W1Z－W2Z＝W1－W2
If angular accelerometer is used to measure the rotation angular acceleration (omega) of traction sheave1: when the brake is released; omega2: when closing a switch
Or
) The braking torque is qualified.
It should be noted that, when the traction ratio is n, the qualified condition of the braking torque calculated by the above calculation method is still n
If a larger safety factor is needed, if the car loading is required to be stopped by 1.3Q, 1.3Q is used for replacing 1.25Q in the formula.
Embodiment 2 (traction machine with or without gear elevator)
The detection method in embodiment 2 is suitable for detecting the braking torque of an elevator by using a gear traction machine, and can also be used for detecting the braking torque of an elevator by using a gearless traction machine. The detection device also comprises a torque wrench and an adapter of the torque wrench and a reel wheel shaft (for a tractor with a gear, the reel wheel of the tractor is generally hollow and shaftless, the reel wheel shaft is a driving motor shaft at the mounting position of the reel wheel when the reel wheel is driven, and the reel wheel of the tractor without the gear is provided with a shaft), and the torque wrench is sleeved on the adapter of the torque wrench and the reel wheel shaft. The detection method specifically comprises the following steps:
(1) obtaining the difference W between the weight of the counterweight and the weight of the car in the brake-released state1-W2；
(2) When the lift car and the counterweight are at the same height, the torque wrench is sleeved on the adapter of the torque wrench and the wheel shaft of the plate car, and the torque wrench is fixed. The brake is opened, only the torque wrench applies force to make the cage in a static state, and the torque value M at the moment is measured1。
(3) The data processing unit is based on the difference value W1-W2Rated load Q and moment M1Calculating a critical value
Or the data processing unit is used for processing the elevator balance coefficient K and the moment value M according to the elevator balance coefficient K1Calculating a critical value
(4) And (4) closing the brake, sleeving the torque wrench on an adapter of the torque wrench and the wheel shaft of the turning wheel, and driving the lift car to ascend in the force application direction of the torque wrench. To momentThe spanner gradually increases the force application and measures the torque value MX. If at
When the car starts to move upwards, the braking torque is unqualified; if at
When the elevator car does not move upwards, the braking torque is qualified.
Or if at
When the car starts to move upwards, the braking torque is unqualified; if at
When the elevator car does not move upwards, the braking torque is qualified
Further, the specific calculation method involved in this embodiment is as follows:
for the sake of calculation, the moments are converted to the disk wheel mounting position, namely the disk wheel shaft. That is, the driving torque generated by the weight difference between the counterweight and the car is input to the reducer and is output to the wheel shaft of the wheel through the reducer. Output torque is input torque multiplied by transmission ratio multiplied by transmission efficiency
The following are all the stress analysis of the disk wheel shaft (all the moments are equivalent to the disk wheel shaft), and the related parameters are as follows:
W1: to the total weight of the counterweight
W2: total mass of cage
R: radius of pitch circle of traction sheave
n1: brake axle to drum wheel axle gear ratio
η1: transmission efficiency of brake axle to disc wheel axle
n2: ratio of traction wheel axle to sheave axle
η2: efficiency of transmission of traction axle to disc axle
MC: braking torque produced by brake when empty car is at rest
MQ: when the cage is loaded with 1.25 times of rated load and is static, the brake moment produced by brake
M1: when the car is empty, the brake is opened, and the torque wrench needs to apply torque on the disc wheel shaft to keep the car static
M2: when the car is loaded with 1.25 times rated load, the brake is opened, and a torque wrench needs to apply torque on the axle of the disc wheel to keep the car static
M: when the brake is closed, the braking torque is converted to a value on the disk wheel axle
K: coefficient of balance of elevator
g: acceleration of gravity
It should be noted that, the counterweight and the car are at the same height, the steel wire ropes and the compensation chains on the counterweight side and the car side are respectively equal, and the weight difference can be ignored. When the elevator is static, the weight difference between the counterweight side and the car side of the elevator is equal to the weight difference between the counterweight side and the car side of the elevator, the driving torque generated by the weight difference and the braking torque generated by the brake are in a balanced state with equal magnitude and opposite directions on the brake wheel, and the two torques are transmitted to the wheel shaft of the wheel.
Referring to fig. 4, when the counterweight and the car are at the same height and the empty car is static, the weight difference between the car and the counterweight generates a driving moment: (W)1-W2) g and R. Converted to the wheel shaft of the disk wheel as (W)1-W2)g·R·n2·η2。
Braking moment MCConverted to the wheel shaft of the disk wheel as MC·n1·η1At rest, the two moments are equal
(W1-W2)g·R·n2·η2＝MC·n1·η1＝M1 (1)
Referring to fig. 5, when the counterweight and the car are at the same height and the car loads 1.25 times of rated load, the weight difference between the car and the counterweight generates a driving moment: [1.25Q- (W)1-W2)]g and R. Is converted intoThe wheel shaft of the disk wheel is [1.25Q- (W)1-W2)]g·R·n2·η2。
Braking moment MQConverted to the wheel shaft of the disk wheel as MQ·n1·η1At rest, the two moments are equal
[1.25Q-(W1-W2)]g·R·n2·η2＝MQ·n1·η1＝M2 (2)
From (1) and (2) can be obtained
Referring to FIG. 6, when the car is empty, the brake is closed and a torque wrench is used to apply a force M in the direction of the car ascendingx. When the car is static, the braking torque is converted into the braking torque on the disk wheel shaft and is M:
M＝MX+(W1-W2)g·R·n2·η2＝MX+M1
in order to ensure that the car can brake reliably when the car is loaded with 1.25 times of rated load, M is required>M2I.e. MX+M1>M2
Namely at
When the cage is not moved, the braking torque meets the requirement,
if at
When the car moves, the braking force is not qualified;
or, at
When the cage is not moved, the braking torque meets the requirement,
if at
When the car moves, the braking force is not qualified.
Here, the above equation is still true when the elevator hoisting ratio is n.
From the above description, it can be seen that, by implementing the method for detecting the braking torque of the elevator according to the embodiment of the invention, the braking torque of the elevator brake can be effectively detected without using weights under the condition that the elevator car is in no load, and whether the braking torque meets the requirements of the inspection specifications or not is judged. Namely, the detection method used in the embodiment of the invention is simple, convenient and safe, does not need weights, and is time-saving and labor-saving.
Based on the same inventive concept, the embodiment of the invention also provides an elevator braking torque detection device, which comprises a data processing unit and is used for:
acquiring detection data including the weight W of the elevator counterweight1And car weight W2Difference (W) between1-W2) Rated load Q of elevator, and moment M required for elevator to be stationary1Moment M required by moving lift carxAnd the maximum acceleration value a of the elevator when the brake is opened in the power-off state of the traction machine1Maximum acceleration value a of elevator in deceleration stop process when brake is closed2；
And judging whether the elevator braking torque is qualified or not according to the detection data.
In a preferred embodiment of the present application, the detecting device is adapted to elevator braking torque detection using a gearless traction machine, and the detecting device further includes an acceleration detecting device. Wherein, the acceleration detection device is fixed on a car, a counterweight, a steel wire rope or a traction sheave of the elevator.
Further, if the acceleration detection device is installed on the steel wire rope entering one side of the traction sheave after the brake is opened, the distance between the acceleration detection device and the traction sheave is more than 5 meters when the brake opening test is started. Preferably, the acceleration detection device and the data processing unit are in wireless connection for data transmission.
In another preferred embodiment of the application, the detection device is suitable for elevator braking torque detection using a geared machine, and can also be used for elevator braking torque detection using a gearless machine. The detection device also comprises a torque wrench and an adapter of the torque wrench and a reel wheel shaft (for a tractor with a gear, the reel wheel of the tractor is generally hollow and shaftless, the reel wheel shaft is a driving motor shaft at the mounting position of the reel wheel when the reel wheel is driven, and the reel wheel of the tractor without the gear is provided with a shaft), and the torque wrench is sleeved on the adapter of the torque wrench and the reel wheel shaft.
It should be noted that, regarding the specific work flow of the detection apparatus in this embodiment, please refer to the foregoing method embodiment, which is not described herein again.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The detection method comprises the step that the data processing unit obtains detection data, wherein the detection data comprises the weight W of the counterweight1And car weight W2Difference (W) between1-W2) Moment M required by static of elevator1Characterized in that the detection data also comprises the moment M required by the moving carxAnd tractor breakMaximum acceleration a of an elevator with the brake on in the electric state1Maximum acceleration value a of elevator in deceleration stop process when brake is closed2(ii) a The detection method further comprises the following steps:
the data processing unit judges whether the braking torque of the elevator is qualified or not according to the rated load capacity Q of the elevator and the calculation result of the detection data;
or the data processing unit judges whether the braking torque of the elevator is qualified or not according to the balance coefficient K of the elevator and the calculation result of the detection data.
2. The detection method according to claim 1, wherein the detection method is applied to elevator braking torque detection using a gearless traction machine, the detection device further comprises an acceleration detection device, and the detection method specifically comprises:
obtaining the rated load capacity Q of the elevator according to the basic parameter information of the elevator;
obtaining a difference (W) between the weight of the counterweight and the weight of the car1-W2)；
When the traction machine is in a power-off state, the star-sealing circuit is disconnected and the brake is opened, the maximum acceleration value a of the elevator is obtained through the acceleration detection device1；
When the brake is closed, the maximum acceleration value a of the elevator in the deceleration and stop process is obtained through the acceleration detection device2；
If it is
Or
The elevator braking torque is qualified.
3. The detection method according to claim 1, wherein the detection method is suitable for detecting the braking torque of the elevator by using a geared traction machine or a gearless traction machine, the detection device further comprises a torque wrench, an adapting device of the torque wrench and a sheave shaft, the torque wrench is sleeved on the adapting device of the torque wrench and the sheave shaft, and the detection method specifically comprises the following steps:
obtaining the rated load capacity Q of the elevator according to the basic parameter information of the elevator;
obtaining a difference (W) between the weight of the counterweight and the weight of the car1-W2)；
The elevator car and the counterweight are at the same height, the brake is opened under the power-off state of the traction machine, the torque wrench applies force to the traction machine through the torque wrench and the adaptive device of the pulley shaft, so that the car is in a static state, and a torque value M when the car is in the static state is measured1；
According to the difference (W)1-W2) Rated load Q and moment M1Calculating a critical value
Or according to the balance coefficient K and the moment value M of the elevator1Calculating a critical value
The brake is closed, the torque wrench applies force to the traction machine through the torque wrench and the adapter of the sheave shaft, the force application direction of the torque wrench is the direction for driving the elevator car to move upwards, the force application is gradually increased, and the moment value M at the moment is measuredx；
If at
When the lift car starts to move upwards, the braking torque of the lift is unqualified; if it is
When the elevator car does not move upwards, the braking torque of the elevator is qualified;
or
When the lift car starts to move upwards, the braking torque of the lift is unqualified; if it is
And in the process, the elevator car does not move upwards, and the braking torque of the elevator is qualified.
4. The elevator braking torque detection device comprises a data processing unit, wherein the data processing unit is used for acquiring detection data, and the detection data comprises counterweight weight W1And car weight W2Difference (W) between1-W2) Moment M required by static of elevator1Characterized in that the detection data also comprises the moment M required by the moving carxAnd the maximum acceleration value a of the elevator when the brake is opened in the power-off state of the traction machine1Maximum acceleration value a of elevator in deceleration stop process when brake is closed2(ii) a The data processing unit is further configured to:
and judging whether the elevator braking torque is qualified or not according to the detection data and the calculation result of the rated load capacity Q of the elevator, or judging whether the elevator braking torque is qualified or not according to the detection data and the calculation result of the elevator balance coefficient K.
5. Detection device according to claim 4, characterized in that the detection device is adapted for elevator braking torque detection using a gearless hoisting machine, the data processing unit being specifically adapted to:
obtaining the rated load capacity Q of the elevator according to the basic parameter information of the elevator;
obtaining the difference (W) between the weight of the counterweight and the weight of the car in the brake-released state1-W2)；
When the traction machine is in a power-off state, the star-sealing circuit is disconnected and the brake is opened, the maximum acceleration value a of the elevator is obtained through the acceleration detection device1；
When the brake is closed, the elevator deceleration is obtained through the acceleration detection deviceMaximum acceleration value a of an accelerated stop process2；
If it is
Or
The brake torque of the elevator is judged to be qualified.
6. The detecting device according to claim 4, wherein the detecting device is adapted to detect the braking torque of the elevator by using a geared traction machine or a gearless traction machine, the detecting device further comprises a torque wrench, an adapting device of the torque wrench and a sheave shaft, the torque wrench is sleeved on the adapting device of the torque wrench and the sheave shaft, and the data processing unit is specifically configured to:
obtaining the rated load capacity Q of the elevator according to the basic parameter information of the elevator;
obtaining the difference (W) between the weight of the counterweight and the weight of the car in the brake-released state1-W2)；
And opening a brake when the tractor is in a power-off state, applying force to the tractor by the torque wrench through the torque wrench and the adapting device of the sheave shaft to enable the car to be in a static state, and measuring a torque value M when the car is in the static state1；
According to the difference (W)1-W2) Rated load Q and moment M1Calculating a critical value
Or according to the balance coefficient K and the moment value M of the elevator1Calculating a critical value
The brake is closed, the torque wrench applies force to the traction machine through the torque wrench and the adapter device of the reel axle, and the force application direction of the torque wrench is drivingThe lift car is moved upwards, the force is gradually increased, and the moment value M at the moment is measuredx；
If at
When the lift car starts to move upwards, the braking torque of the lift is unqualified; if it is
When the elevator car does not move upwards, the braking torque of the elevator is qualified;
or if at
When the lift car starts to move upwards, the braking torque of the lift is unqualified; if it is
And in the process, the elevator car does not move upwards, and the braking torque of the elevator is qualified.
7. The detecting device according to claim 5, wherein the acceleration detecting device is fixed to a car, a counterweight, a wire rope, or a traction sheave of an elevator.
8. The detecting device according to claim 7, wherein if the acceleration detecting device is installed on the wire rope on a side where the wire rope enters the traction sheave after the brake is turned on, the acceleration detecting device is installed at a position spaced from the traction sheave by more than 5 m at the start of the brake-on test.
9. A testing device according to claim 7 or 8 wherein the acceleration testing device and the data processing unit are adapted to communicate data using a wireless connection.
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| CN111348511B (en) * | 2020-02-26 | 2021-08-10 | 沈阳市蓝光自动化技术有限公司 | Elevator braking force accurate detection method based on elevator balance coefficient |
| CN111717752B (en) * | 2020-06-18 | 2022-03-01 | 深圳市质量安全检验检测研究院 | Method, apparatus, storage medium and device for checking braking performance of elevator brake |
| CN113184648B (en) * | 2021-02-04 | 2022-07-08 | 四川省特种设备检验研究院 | Method for detecting braking force and traction force of elevator |
| CN113800352B (en) * | 2021-09-13 | 2023-05-12 | 李景辉 | Elevator braking moment detection method and device |
| CN114229644A (en) * | 2021-12-21 | 2022-03-25 | 福建省特种设备检验研究院泉州分院 | Elevator maintenance evaluation method |
| CN114560371B (en) * | 2022-03-11 | 2022-11-01 | 四川省特种设备检验研究院 | Elevator steel wire rope traction force detection and verification system and method |
| CN114920101B (en) * | 2022-05-27 | 2024-05-07 | 日立电梯（中国）有限公司 | Elevator verification method, system, device, computer equipment and storage medium |
| CN117775917B (en) * | 2024-02-27 | 2024-04-26 | 通用电梯股份有限公司 | Method and device for rapidly detecting traction force of steel wire rope traction driving elevator |
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