A multi-rotation valve gear box and method of use thereof

Abstract

The application provides a multi-rotation valve gear box and a use method thereof, and belongs to the technical field of gear boxes. The gear box comprises a box body, a transmission shaft and a driving shaft. A driven bevel gear is arranged on the transmission shaft. An active bevel gear is arranged at one end of the driving shaft. An oil storage cavity is arranged at the end of the active bevel gear. A fixed shaft is arranged in the box body. One end of the fixed shaft extends into the oil storage cavity. An oil channel is arranged in the fixed shaft and is communicated with the oil storage cavity. A plurality of first channels are arranged on the active bevel gear and penetrate the active bevel gear in the circumferential direction. The outlet end of the first channel is located at the root of the adjacent teeth of the active bevel gear. A first oil path communicated with the inner cavity of the box body and a second oil path communicated with the oil channel are arranged on the box body. The first oil path and the second oil path are respectively connected with an opening degree control valve. In the application, the lubricating oil can be more effectively and uniformly covered on the tooth surface needing lubrication. Especially when the gear is running at high speed or bearing high load, a stable lubricating oil film can be formed, and the gear wear can be significantly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gear boxes, in particular to a multi-rotation valve gear box and a use method thereof. BACKGROUND

[0002] The multi-rotation gear box, as a key speed reduction mechanism widely used in multi-rotation valves such as gate valves, stop valves, sluices and gates, plays an important role in the fields of electric power, oil and gas, water treatment and conventional industrial process control. Its main function is to realize accurate opening and closing control of the valve through manual or electric operation according to the site requirements.

[0003] The applicant's previous application with the publication number CN220354612U discloses an economic valve multi-rotation gear box. The gear box only inputs lubricating oil through the oil inlet opening at the corresponding position of the driving bevel gear on the top of the box to lubricate the meshing surface of the driving bevel gear and the driven bevel gear. This single and passive lubrication method cannot effectively and uniformly cover all the tooth surfaces that need to be lubricated. Especially when the gear is running at high speed or bearing high load, the lubricating oil film is easy to break, thereby aggravating the gear wear and reducing the service life and working efficiency of the gear box. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings and deficiencies of the prior art and provide a multi-rotation valve gear box and a use method thereof.

[0005] The technical solution adopted by the present application is as follows: In a first aspect, the present application provides a multi-rotation valve gear box, which comprises a box body, a transmission shaft transversely arranged in the box body, and a driving shaft longitudinally arranged in the box body. A driven bevel gear is arranged on the transmission shaft and used to be connected with an actuator. A driving bevel gear is arranged at one end of the driving shaft and used to be connected with a valve stem. An oil storage cavity is arranged at the end of the driving bevel gear. A fixed shaft is arranged in the box body, one end of the fixed shaft extends into the oil storage cavity, and an oil channel is arranged in the fixed shaft and communicates with the oil storage cavity. A plurality of first channels are arranged on the driving bevel gear in the circumferential direction and have outlet ends located at the root portions of adjacent teeth on the driving bevel gear. A first oil path communicating with the inner cavity of the box body and a second oil path communicating with the oil channel are arranged on the box body. The first oil path and the second oil path are respectively connected with an opening degree control valve in series.

[0006] In some embodiments, the fixed shaft is coaxially provided with a linkage disc at the oil storage cavity, the linkage disc comprises a circumferential linkage surface, a plurality of groove portions are uniformly arranged on the circumferential linkage surface, a moving block is slidably arranged in the first channel, the moving block is in sliding contact with the circumferential linkage surface, springs are arranged between the two ends of the moving block and the inner wall of the first channel, first oil grooves are arranged on the two side walls of the moving block, second oil grooves are arranged on the two side walls of the first channel and are in communication with the inner cavity of the box, the moving block has a first position abutting the groove portion and a second position sliding out of the groove portion, when in the first position, the first oil grooves are in communication with the oil storage cavity and are isolated from the second oil grooves, when in the second position, the first oil grooves are isolated from the oil storage cavity and the second oil grooves are in communication, when the valve is opened and closed by the actuator, the transmission shaft drives the driving bevel gear to rotate relative to the linkage disc, so that the moving block switches between the first position and the second position, and the lubricating oil in the oil storage cavity is transported to the tooth surface of the driving bevel gear.

[0007] In some embodiments, the linkage disc is located in the middle of the moving block and comprises at least two spaced linkage plates, the circumferential linkage surface is the outer profile surface of the linkage plates, the number of groove portions is the same as that of the moving block and is uniformly arranged on the outer profile surface, and one groove portion is located at the lowest part in the vertical direction of the outer profile surface.

[0008] In some embodiments, when the moving block is in the first position, the outer end surface of the moving block is lower than the outer tooth surface of the driving bevel gear, and when the moving block is in the second position, the outer end surface of the moving block does not exceed the outer tooth surface of the driving bevel gear.

[0009] In some embodiments, the side wall of the first oil groove close to the second oil groove is provided as an oil guide slope, and the side close to the linkage disc of the oil guide slope is inclined towards the second oil groove.

[0010] In some embodiments, the side close to the opening end of the oil storage cavity is provided with an annular baffle, the outer circle of the annular baffle is tightly attached to the inner wall of the oil storage cavity, and the inner circle has a diameter greater than the outer diameter of the fixed shaft.

[0011] In some embodiments, the opening end of the oil storage cavity is rotatably arranged on the inner wall of the box through a rotating bearing, and the rotating bearing is located on the side of the annular baffle away from the linkage disc.

[0012] In some embodiments, a lubricating oil circulation system is further included, the bottom of the box is provided with an oil discharge port, the lubricating oil circulation system comprises a lubricating oil storage device, an input oil path and a discharge oil path, the input oil path is connected with the oil inlet, the discharge oil path is connected with the oil discharge port, and a recovery control valve and a discharge pump are arranged on the discharge oil path, and an input pump is arranged on the input oil path.

[0013] In the second aspect, the application provides a use method of the multi-rotation valve gear box, comprising the following steps:

[0014] The real-time torque value T of the transmission shaft is collected in real time by the torque sensor;

[0015] When T is less than or equal to the rated torque, the opening degree of the first oil path is controlled to follow the change of T for dynamic adjustment, and the opening degree of the second oil path is kept at the basic opening degree;

[0016] When T is greater than the rated torque, the first oil path is controlled to open to the maximum opening degree, and the opening degree of the second oil path is controlled to follow the change of T for dynamic adjustment;

[0017] The liquid level of the lubricating oil in the inner cavity of the box body is monitored in real time by the liquid level sensor, and the liquid level of the lubricating oil is controlled in the preset range by the input oil path and the discharge oil path.

[0018] In some embodiments, a long-term shutdown start control is further included, comprising the following steps:

[0019] The single shutdown duration of the gear box is obtained, and if the single shutdown duration is greater than a preset threshold, it is determined that the gear box is not started for a long time;

[0020] When the gear box actuator receives a start-stop instruction, the opening degree of the second oil path is controlled to continuously supply oil at the maximum opening degree for a preset duration, and the first oil path is simultaneously opened to supply oil at the basic opening degree until the oil supply amount of the second oil path reaches a preset amount;

[0021] The actuator is started, the opening torque value is monitored in real time by the torque sensor, and a shutdown duration-opening torque value-pre-set amount mapping model is established, and the preset amount is optimized and adjusted in real time based on the opening torque value, so that the subsequent preset amount directly matches the output value of the model.

[0022] The beneficial effects of the application are as follows: compared with the single and passive oil injection method in the prior art, the application can ensure that the lubricating oil is more effectively and uniformly covered on the tooth surface that needs to be lubricated, especially when the gear is running at high speed or bearing high load, a stable lubricating oil film can be formed, and the gear wear is significantly reduced. By using the first oil path and the second oil path to control the opening degree of the valve respectively, the supply amount and supply path of the lubricating oil can be flexibly adjusted according to the actual working condition, and the lubrication effect is further optimized. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings obtained according to these drawings without creative labor are still within the scope of the application.

[0024] Figure 1 is a schematic view of a valve gear box of a multi-rotation type according to the present invention;

[0025] Figure 2 is a schematic view of a valve gear box of a multi-rotation type according to the present invention; Figure 1 is an enlarged view of A in FIG. 1;

[0026] Figure 3 is a partial schematic view of a valve gear box of a multi-rotation type according to the present invention; Figure 1 ;

[0027] Figure 4 is a partial schematic view of a valve gear box of a multi-rotation type according to the present invention; Figure 2 ;

[0028] Figure 5 is a sectional view of a driving bevel gear according to the present invention.

[0029] REFERENCE NUMERALS:

[0030] 1 - housing, 2 - driving shaft, 3 - driven shaft, 4 - driven bevel gear, 5 - driving bevel gear, 6 - fixed shaft, 7 - first oil passage, 8 - second oil passage, 9 - opening control valve, 10 - moving block, 11 - spring, 12 - first oil groove, 13 - second oil groove, 14 - annular baffle, 15 - rotating bearing, 16 - oil discharge port, 17 - lubricating oil storage device, 18 - input oil passage, 19 - discharge oil passage, 20 - control valve, 21 - discharge pump, 22 - input pump, 120 - oil guide slope, 500 - oil storage chamber, 501 - first passage, 600 - oil passage, 610 - circumferential linkage surface, 611 - groove portion, 612 - linkage piece, 613 - outer contour surface. DETAILED DESCRIPTION

[0031] The following description provides specific applications and requirements of the present specification, with the aim of enabling a person skilled in the art to manufacture and use the contents of the present specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present specification. Therefore, the present specification is not limited to the shown embodiments, but to the widest scope consistent with the claims.

[0032] In the description of the present application, it should be noted that the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and these terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation or to be constructed and operated in a specific orientation.

[0033] It should be noted that the terms "first", "second", and the like are not intended to denote any order, quantity, or importance, but are merely used to distinguish different components, and should not be understood as limiting the embodiments of the present application.

[0034] It should be noted that the terms "mount", "set", "provided with", "connect", "connected" should be interpreted broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components.

[0035] It should be noted that the terms "in some embodiments", "exemplarily", "for example" and the like are used to indicate as an example, illustration or description. Any embodiment or design scheme described as "in some embodiments", "exemplarily", "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "in some embodiments", "exemplarily", "for example" and the like is intended to present the relevant concept in a specific way, meaning that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The occurrence of the above terms at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] With regard to the drawings of the present application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only, and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0038] As Figures 1 to 5As shown, the application provides a multi-rotation valve gear box, which comprises a box body 1, a transmission shaft 2 transversely arranged in the box body 1, and a drive shaft 3 longitudinally arranged in the box body 1. The transmission shaft 2 is provided with a driven bevel gear 4 for connecting with an actuator. One end of the drive shaft 3 is provided with a driving bevel gear 5 engaged with the driven bevel gear 4 for connecting with a valve stem. An oil storage cavity 500 is formed in the end of the driving bevel gear 5, which can be an annular cavity for storing lubricating oil.

[0039] A fixed shaft 6 is arranged in the box body 1, one end of the fixed shaft 6 is coaxially arranged with the oil storage cavity 500 and extends into the oil storage cavity 500. An oil channel 600 is arranged in the fixed shaft 6 and communicates with the oil storage cavity 500, so that the lubricating oil can be delivered from the fixed shaft 6 to the oil storage cavity 500. The oil channel 600 can be arranged axially or radially along the fixed shaft 6.

[0040] A plurality of first channels 501 are arranged along the circumference of the driving bevel gear 5. The outlet ends of the first channels 501 are located at the root of the adjacent teeth of the driving bevel gear 5. These channels can be uniformly distributed on the circumference of the driving bevel gear 5 to ensure that the lubricating oil can be uniformly delivered to each tooth surface. It can be understood that the shape and number of the first channels 501 can also be adjusted according to the tooth shape of the driving bevel gear 5 and the lubrication requirement. For example, circular, elliptical, rectangular channels, long strip-shaped narrow slits, or racetrack-shaped through holes can be used, and the number of channels can be determined according to the size and working conditions of the gear. For example, one or more first channels 501 can be arranged at the root of the adjacent teeth.

[0041] A first oil path 7 and a second oil path 8 are arranged on the box body 1 and communicate with the inner cavity of the box body 1 and the oil channel 600 respectively. The first oil path 7 and the second oil path 8 are connected in series with an opening control valve 9. The first oil path 7 and the second oil path 8 are the delivery paths of the lubricating oil, and the opening control valve 9 is used to adjust the flow of the lubricating oil. The opening control valve 9 can be an electric valve, a pneumatic valve or an electromagnetic valve, which is used to accurately control the flow of the lubricating oil, and is preferably a control valve suitable for the delivery of the lubricating oil.

[0042] It can be understood that the pipe diameter and layout of the first oil path 7 and the second oil path 8 can be optimized according to the overall structure of the gear box and the delivery distance of the lubricating oil to reduce fluid resistance and improve lubrication efficiency.

[0043] Through the above arrangement, efficient and accurate lubrication of the key gear meshing surface in the multi-rotation gear box can be ensured, and the problem that the lubricating oil cannot effectively and uniformly cover the tooth surface in the prior art, resulting in gear wear and reduced service life, can be effectively solved.

[0044] Meanwhile, the traditional lubrication mode is the same as the first oil path 7, and the second oil path 8 of the application outputs lubricating oil from the inside of the driving bevel gear 5 to the tooth surface, which is more efficient and accurate, and greatly improves the lubrication effect of the gear meshing surface.

[0045] In addition, as the driving bevel gear 5 rotates, the lubricating oil in the oil storage cavity 500 will be transported to the root of the adjacent tooth of the driving bevel gear 5 through the centrifugal force or pressure effect via the first channel 501 provided through the circumference, and the first channel 501 enables the lubricating oil to directly act on the key area of the gear meshing, thereby providing continuous and effective lubrication to the meshing tooth surface of the driving bevel gear 5 and the driven bevel gear 4.

[0046] Further, based on the first channel 501 being a long hole provided at the root of the adjacent tooth of the driving bevel gear 5, the fixed shaft 6 is coaxially provided with a linkage disc 61 in the oil storage cavity 500, the linkage disc 61 includes a circumferential linkage surface 610, a plurality of groove portions 611 are uniformly provided on the circumferential linkage surface 610, a moving block 10 is slidably arranged in the first channel 501, preferably, four moving blocks 10 and four groove portions 611 are arranged in the application, and are arranged in a cross shape, the moving block 10 is in sliding contact with the circumferential linkage surface 610, springs 11 are arranged between the two ends of the moving block 10 and the inner wall of the first channel 501, first oil grooves 12 are formed on the two side walls of the moving block 10, and second oil grooves 13 are formed on the two side walls of the first channel 501 and are in communication with the inner cavity of the box body 1. Figure 4 As shown in the drawings, the two ends of the first channel 501 are provided with side channels, the two ends of the moving block 10 are correspondingly provided with protrusions, and the protrusions are provided with positioning holes or positioning columns for positioning the springs.

[0047] The moving block 10 has a first position abutting the groove portion 611 and a second position sliding out of the groove portion 611. When in the first position, the first oil groove 12 is in communication with the oil storage cavity 500 and isolated from the second oil groove 13. When in the second position, the first oil groove 12 is isolated from the oil storage cavity 500 and the second oil groove 13 is in communication with the inner cavity of the box 1. When the actuator opens and closes the valve, the transmission shaft 2 drives the driving bevel gear 5 to rotate relative to the linkage disc 61, so that the moving block 10 switches between the first position and the second position, and the lubricating oil in the oil storage cavity 500 is transported to the tooth surface of the driving bevel gear 5. Specifically, by introducing the synergy of the linkage disc 61 and the moving block 10, the problem of insufficient lubricating oil transport efficiency and uniformity in the traditional lubrication mode is effectively solved. When the actuator opens and closes the valve, the transmission shaft 2 drives the driving bevel gear 5 to rotate. Since the linkage disc 61 is fixedly arranged, the rotation of the driving bevel gear 5 causes the first channel 501 thereon and the moving block 10 inside to rotate relative to the linkage disc 61. When the moving block 10 encounters the groove portion 611 on the circumferential linkage surface 610 of the linkage disc 61 during rotation, the moving block 10 will abut and enter the groove portion 611 under the action of the spring. At this time, the moving block 10 is in the first position. In the first position, the first oil groove 12 on the moving block 10 is in communication with the oil storage cavity 500, thereby allowing the lubricating oil in the oil storage cavity 500 to enter the first channel 501 through the first oil groove 12. With the continuous rotation of the driving bevel gear 5, the moving block 10 will slide out of the groove portion 611. At this time, the moving block 10 is in the second position. In the second position, the first oil groove 12 is isolated from the oil storage cavity 500, and the second oil groove 13 is in communication with the inner cavity of the box 1. Due to the rotation of the driving bevel gear 5, the centrifugal force will cause the lubricating oil in the first channel 501 to be thrown out through the second oil groove 13 and directly transported to the tooth surface of the driving bevel gear. This periodic switching mechanism ensures that the lubricating oil can be continuously and uniformly transported to each tooth surface of the driving bevel gear, thereby effectively improving the lubrication condition of the gear.

[0048] Through the above technical solution, the present application can realize efficient and uniform lubrication of the tooth surface of the driving bevel gear, significantly reduce gear wear, and prolong the service life of the gear box. Compared with the basic scheme of relying only on the oil storage cavity and the oil channel for lubrication, the present application actively and periodically transports the lubricating oil in the oil storage cavity to the tooth surface through the mechanical linkage of the linkage disc and the moving block, thereby avoiding the problems of lubrication dead angle and insufficient lubrication. This active lubrication mechanism can provide more reliable lubrication protection, especially in high-speed or heavy-load operating conditions of the gear box, thereby improving the overall performance and reliability of the multi-rotation type valve gear box.

[0049] Preferably, when the moving block 10 is in the first position, the protrusion is also located in the side channel, avoiding the inflow of lubricating oil affecting the spring 11.

[0050] In some embodiments, the linkage disc 61 is located in the middle of the moving block 10 and includes at least two spaced linkage plates 612, which means that the linkage disc 61 is centrally located in the length direction of the moving block 10, ensuring that the moving block 10 can always stably contact the circumferential linkage surface 610 of the linkage disc 61 when sliding in the first channel 501, thereby ensuring the reliable cooperation of the moving block 10 and the groove part 611. The linkage plate 612 is a thin plate with a small thickness, so that the lubricating oil can accumulate at the groove part 611, affecting the linkage cooperation of the moving block 10. The circumferential linkage surface 610 is the outer contour surface 613 of the linkage plate 612, and the groove part 611 is uniformly arranged on the outer contour surface 613 in the same number as the moving block 10. One of the groove parts 611 is located at the lowest part of the outer contour surface 613 in the vertical direction, which enables at least one groove part 611 to be in the most advantageous position below the gravity flow of the lubricating oil during the rotation of the driving bevel gear 5, thereby assisting the delivery of the lubricating oil.

[0051] In some embodiments, when the moving block 10 is in the first position, the outer end surface of the moving block 10 is lower than the outer tooth surface of the driving bevel gear 5, and when the moving block 10 is in the second position, the outer end surface of the moving block 10 does not exceed the outer tooth surface of the driving bevel gear 5. In this way, the moving block 10 can effectively deliver lubricating oil in different positions without interfering with the normal meshing of the driving bevel gear 5.

[0052] In some embodiments, the side wall of the first oil groove 12 near the second oil groove 13 is arranged as an oil guide slope 120, which is inclined toward the second oil groove 13 on the side close to the linkage disc 61. Specifically, the oil guide slope can be arranged as a plane or a curved surface, and the inclination angle can be adjusted according to actual needs to achieve the best oil guiding effect. In this way, the oil groove structure can be optimized to guide the lubricating oil to flow more smoothly, improving the lubrication efficiency.

[0053] In some embodiments, the oil storage cavity 500 is provided with an annular baffle 14 on the side close to the opening end, the outer circle of the annular baffle 14 is tightly attached to the inner wall of the oil storage cavity 500, and the inner circle has a diameter greater than the outer diameter of the fixed shaft 6, which can store a certain amount of lubricating oil in the oil storage cavity 500 for long-term lubrication.

[0054] Further, the opening end of the oil storage cavity 500 is rotatably arranged on the inner wall of the box body 1 through a rotating bearing 15, and the rotating bearing 15 is located on the side of the annular baffle 14 away from the linkage disc 61. In this way, not only can the stable rotation of the oil storage cavity 500 be ensured to improve the output efficiency of the lubricating oil, but also the rotation of the driving bevel gear 5 at both ends can be positioned to improve the stability during rotation. It should be understood that the transmission shaft 2 is also connected to the box body 1 through a rotating bearing.

[0055] In some embodiments, the aforementioned multi-rotation valve gear box further comprises a lubricating oil circulation system, the bottom of the box 1 is provided with an oil outlet 16, the lubricating oil circulation system comprises a lubricating oil storage device 17, an input oil path 18 and an output oil path 19, the input oil path 18 is connected with the oil inlet, the output oil path 19 is connected with the oil outlet 16, and a recovery control valve 20 and an output pump 21 are arranged on the output oil path 19, and an input pump 22 is arranged on the input oil path 18. Through the lubricating oil circulation system, the recycled use and timely replacement of the lubricating oil can be realized. Specifically, the input pump draws the lubricating oil from the lubricating oil storage device, injects the lubricating oil into the box through the input oil path, and lubricates the gear. The lubricated lubricating oil flows out through the oil outlet, and the output pump draws the lubricating oil, which is filtered and cooled, and then recovered to the lubricating oil storage device, thereby completing a cycle.

[0056] The lubricating oil storage device 17 is preferably a related device in the prior art that can filter and purify the returned lubricating oil, such as separation through two steps of coalescence and sedimentation, adsorption separation, centrifugal separation, etc.

[0057] The application provides a use method applied to the aforementioned multi-rotation valve gear box, which comprises the following steps:

[0058] The real-time torque value T of the transmission shaft 2 is collected in real time through the torque sensor;

[0059] When T≤rated torque, it belongs to a low-load working condition, at this time, the opening degree of the first oil path 7 is dynamically adjusted to follow the change of T to avoid the increase of resistance caused by excessive lubrication; the second oil path 8 keeps a basic opening degree to realize double-oil-path lubrication.

[0060] Preferably, in the T≤rated torque interval, respectively, a low-load zone and a medium-load zone, when the load is low, the opening degree of the first oil path increases slowly with T, for example, 5% opening degree is increased for every 10% torque increase, and the second oil path keeps a basic opening degree; when the load is medium, the increase speed of the opening degree of the first oil path is increased, for example, 10% opening degree is increased for every 10% torque increase, and the second oil path keeps a basic opening degree, thereby avoiding the sudden change of the opening degree of the oil path when switching from low load to high load and reducing the lubrication fluctuation.

[0061] Among them, regarding the basic opening degree of the second oil path 8, the basic opening degree of the second oil path 8 at low load is bound with the rated torque, for example, the basic opening degree = 50% of the first oil path opening degree corresponding to the rated torque, rather than a fixed value. When the rated torque changes due to long-term operation of the gear box, the basic opening degree can be automatically adapted, thereby avoiding insufficient lubrication caused by a fixed reference.

[0062] When T> rated torque, it belongs to high load working condition, at this time, the first oil way 7 is controlled to open to the maximum opening degree, and the second oil way 8 opening degree is dynamically adjusted following the change of T, and oil is directly supplied to the gear meshing place through the second oil way 8, so that rapid lubrication is realized.

[0063] Preferably, when T> rated torque, different adjustment slopes are set according to the torque exceeding proportion: the more the torque exceeds, the faster the second oil way opening degree increases, and the more accurate the lubrication demand gradient under high load is matched.

[0064] In the above adjustment, the liquid level of the lubricating oil in the inner cavity of the box 1 is monitored in real time through the liquid level sensor, and the lubricating oil liquid level is controlled in the preset range through the input oil way 18 and the discharge oil way 19, and the preset range includes the upper limit value and the lower limit value of the oil level. It can be understood that the upper limit value of the oil level should be less than the actual maximum oil level of the gear box, generally 70%-90% of the actual maximum oil level, so that there is enough oil level space for the first oil way 7 and the second oil way 8 to adjust.

[0065] Through the above method, the supply of lubricating oil can be dynamically adjusted according to the actual working condition of the gear box, so that the gear box can obtain the best lubrication effect under various working conditions, prolong the service life of the gear box, and improve the reliability of the gear box.

[0066] Further, it also includes long-term shutdown start control, including the following steps:

[0067] The single shutdown time length of the gear box is obtained, and if the single shutdown time length is greater than the preset threshold, it is determined that the gear box is not started for a long time;

[0068] When the gear box actuator receives the start and stop instruction, the second oil way 8 is controlled to supply oil at the maximum opening degree for a preset time length, and the first oil way 7 is opened at the basic opening degree at the same time, until the second oil way 8 reaches the preset amount; the preset amount is generally set according to the capacity of the oil storage cavity 500. In this way, the second oil way 8 can pre-supply oil, which can shorten the opening time of the gear box, mainly because the second oil way 8 directly supplies oil to the meshing place, and the lubrication effect is better, if the first oil way is used in the traditional way, the lubricating oil in the box needs to be supplemented to a certain liquid level.

[0069] The start actuator is monitored in real time through the torque sensor, and a mapping model of shutdown time length-opening torque value-pre-set amount is established, and the pre-set amount is optimized in real time based on the opening torque value, so that the subsequent pre-set amount directly matches the output value of the model.

[0070] The preset threshold refers to a time limit value for judging whether the gearbox is in a long-term shutdown state. The preset threshold can be adjusted according to the actual application scenario, for example, it can be set to one week, one month or longer. The preset amount refers to the amount of lubricating oil that needs to be injected in advance to ensure that the gearbox can start smoothly after a long shutdown. The mapping model refers to a corresponding relationship model between the shutdown time, the starting torque value and the preset amount. The model can be established through experimental data or historical data, and is used to automatically adjust the preset amount according to different shutdown times and starting torque values to achieve the best lubrication effect.

[0071] Through the above method, by injecting an appropriate amount of lubricating oil in advance after the long-term shutdown of the gearbox, and monitoring the starting torque value in real time during the starting process, and adjusting the preset amount in real time based on the starting torque value, the problem of difficult starting of the gearbox after a long-term shutdown is effectively solved, and damage to the gear caused by dry friction is avoided, prolonging the service life of the gearbox.

[0072] In summary, after reading the detailed disclosure, those skilled in the art can understand that the foregoing detailed disclosure can be presented only in an exemplary manner and can not be limiting. Although not explicitly stated herein, those skilled in the art can understand that the present application requires to encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0073] In addition, it should be understood that in the foregoing description of the embodiments of the present application, for the purpose of helping to understand one feature, the present application combines various features in a single embodiment, figure or its description for the purpose of simplifying the present application. However, this does not mean that the combination of these features is necessary, and those skilled in the art can well understand one part of the device as a separate embodiment when reading the present application. That is, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. And the content of each secondary embodiment is also valid when there are less than all the features of a single previously disclosed embodiment.

[0074] Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of the application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are only examples and not limitations. Those skilled in the art can take alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments precisely described in the application.

Claims

1. A method of using a multi-turn valve gearbox, the gearbox comprising a housing, a transmission shaft laterally rotatably mounted on the housing, and a drive shaft longitudinally rotatably mounted on the housing, wherein a driven bevel gear is mounted on the transmission shaft for connection to an actuator, and a driving bevel gear is mounted at one end of the drive shaft for connection to a valve stem, characterized in that: The end of the driving bevel gear has an oil storage cavity. A fixed shaft is installed inside the housing, with one end of the fixed shaft extending into the oil storage cavity. An oil passage communicating with the oil storage cavity is provided inside the fixed shaft. Several first channels are provided circumferentially through the driving bevel gear. The outlet end of the first channel is located at the root of the adjacent tooth on the driving bevel gear. The housing is provided with a first oil passage communicating with the inner cavity of the housing and a second oil passage communicating with the oil passage. The first oil passage and the second oil passage are connected in series with opening control valves. A linkage disc is coaxially arranged on the fixed shaft and the oil storage cavity. The linkage disc includes a circumferential linkage surface. Multiple grooves are evenly arranged on the circumferential linkage surface. A moving block is slidably arranged in the first channel. The moving block slides in contact with the circumferential linkage surface. Springs are provided between its two ends and the inner wall of the first channel. First oil grooves are opened on its two side walls. The side wall has a second oil groove communicating with the inner cavity of the housing. The moving block has a first position abutting against the groove and a second position sliding out of the groove. When in the first position, the first oil groove and the oil storage cavity are connected and isolated from the second oil groove. When in the second position, the first oil groove and the oil storage cavity are isolated and the second oil groove is connected. When the valve is opened and closed by the actuator, the transmission shaft drives the active bevel gear to rotate relative to the linkage disc, so that the moving block switches between the first position and the second position, and delivers the lubricating oil in the oil storage cavity to the tooth surface of the active bevel gear. It also includes a lubricating oil circulation system. The bottom of the housing is provided with an oil drain port. The lubricating oil circulation system includes a lubricating oil storage device, an input oil line and an output oil line. The input oil line is connected to the oil inlet, and the output oil line is connected to the oil drain port. A recovery control valve and an output pump are provided on the input oil line. The method of use includes the following steps: real-time torque value T of the drive shaft is collected by a torque sensor; when T ≤ rated torque, the opening of the first oil circuit is dynamically adjusted to follow the change of T, while the second oil circuit maintains a basic opening; when T > rated torque, the first oil circuit is opened to the maximum opening, while the opening of the second oil circuit is dynamically adjusted to follow the change of T; the level of lubricating oil in the inner cavity of the housing is monitored in real time by a level sensor, and the lubricating oil level is controlled within a preset range by the input oil circuit and the discharge oil circuit.

2. The method of using a multi-turn valve gearbox according to claim 1, characterized in that: The linkage disk is located in the middle of the moving block and includes at least two linkage plates spaced apart. The circumferential linkage surface is the outer contour surface of the linkage plate. The number of grooves is the same as that of the moving block and they are evenly distributed on the outer contour surface. One of the grooves is located at the lowest part of the outer contour surface in the vertical direction.

3. The method of using a multi-turn valve gearbox according to claim 1, characterized in that: When the moving block is in the first position, the outer end face of the moving block is lower than the outer tooth surface of the driving bevel gear. When the moving block is in the second position, the outer end face of the moving block does not exceed the outer tooth surface of the driving bevel gear.

4. The method of using a multi-turn valve gearbox according to claim 1, characterized in that: The side wall of the first oil tank near the second oil tank is configured as an oil guiding slope, and the side of the oil guiding slope near the linkage plate is inclined toward the second oil tank.

5. The method of using a multi-turn valve gearbox according to claim 1, characterized in that: An annular baffle is provided on one side of the oil storage chamber near its opening end. The outer ring of the annular baffle is in close contact with the inner wall of the oil storage chamber, and the diameter of its inner ring is larger than the outer diameter of the fixed shaft.

6. The method of using a multi-turn valve gearbox according to claim 5, characterized in that: The opening end of the oil storage chamber is rotatably mounted on the inner wall of the box via a rotary bearing, which is located on the side of the annular baffle away from the linkage plate.

7. The method of using a multi-turn valve gearbox according to claim 1, characterized in that: It also includes long-term shutdown start-up control, including the following steps: The duration of a single shutdown of the gearbox is obtained. If the duration of a single shutdown exceeds a preset threshold, it is determined that the gearbox has not been started for a long time. When the gearbox actuator receives the opening and closing command, it first controls the opening of the second oil circuit to supply oil continuously at the maximum opening for a preset time, and simultaneously opens the first oil circuit to supply oil at the basic opening until the oil supply of the second oil circuit reaches the preset amount. The actuator is started and the torque sensor monitors the starting torque value in real time. A mapping model of shutdown time, starting torque value, and preset amount is established. The preset amount is optimized and adjusted in real time based on the starting torque value so that subsequent preset amounts directly match the output value of the model.

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