Backstop with clutch device and permanent magnet roller having the same

Abstract

The present application discloses a check valve with a clutch device and a permanent magnet roller having the same, wherein the check valve with a clutch device comprises: a housing connected to a rotating component; an inner ring disposed in the housing and fixed; an outer ring disposed between the inner ring and the housing; a torque transmission assembly disposed between the housing and the outer ring for realizing one-way rotation of the housing relative to the outer ring; a clutch device disposed between the inner ring and the outer ring for controlling the combination or separation of the outer ring and the inner ring to realize free rotation of the outer ring relative to the inner ring or transmission of torque. The permanent magnet roller comprises the check valve with a clutch device as described above. The advantages of the present application are: the inner ring of the check valve with a clutch device of the present application is fixed, and the outer ring rotates, which is exactly the opposite of the existing check valve structure, and solves the limitation that the traditional check valve can only rotate in one direction; at the same time, it solves the problem that the permanent magnet roller needs to be reversed when starting.

Description

Technical Field

[0001] The present application relates to the technical field of backstops, and in particular to a backstop with a clutch device and a permanent magnet roller having the same. Background Art

[0002] In the field of material transportation, especially when using conveyors to transport bulk materials, it is often necessary to limit the direction of material transportation, such as a belt conveyor with an angle. When transporting materials normally, the conveyor runs upward. When there is a device failure or a sudden power outage, it is necessary to limit the reverse operation of the conveyor to prevent system damage or personal injury.

[0003] With the development of industrial technology, the current drive technology is also being updated. The drive system has been updated from the original motor acceleration and deceleration drive drum to the direct drive of the drum, that is, the current permanent magnet drum. The permanent magnet drum is exactly the opposite of the traditional drum structure. The drum shaft of the traditional drum is fixedly connected to the drum body. Generally, the drum shaft extends out of the axial end faces of the drum body. One end of the drum shaft is connected to the output shaft of the reducer, and the output shaft at the other end can be used to install the backstop. The inner ring of the backstop rotates synchronously with the drum shaft, and the outer ring is limited on the base by the force arm. During normal operation, the drum shaft rotates synchronously with the drum body, and the inner ring of the backstop rotates synchronously with the drum shaft. When the drum tends to rotate in the opposite direction, the backstop takes effect to prevent the drum from rotating in the opposite direction.

[0004] The structure of the permanent magnet drum is different from that of the traditional drum. Both ends of the drum shaft of the permanent magnet drum are fixed on the base and cannot rotate. The drum body rotates around the drum shaft. This leads to the first problem: there is no installation position for the backstop and the drum shaft is stationary.

[0005] In addition, since the driving principle of the permanent magnet drum is different from that of the prior art, there is another problem when the permanent magnet drum is started: the drum of the permanent magnet drum will reverse. If the backstop of the original structure is used again, the backstop will directly prevent the rotation of the drum, resulting in failure to start normally.

[0006] Question three: when using multiple check valves, the force applied to the multiple check valves is not synchronized, resulting in the selection coefficient of each check valve being too large; even if the model of the check valve is enlarged, if there is a large installation error among the multiple check valves during installation, there may still be a situation where the check valve that is applied first is overloaded while the other check valves are not applied, causing the check valves to be damaged faster.

[0007] Question 4: Since the permanent magnet roller can be driven directly, the motor and reducer in the existing drive are no longer needed. The permanent magnet roller can be directly installed on the drive motor, causing the check arm to lose its limiting base and be unable to provide reverse check force.

[0008] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned defects of the prior art.

[0009] Application Contents

[0010] The object of the present application is to provide a backstop with a clutch device and a permanent magnet roller having the same to overcome or at least alleviate at least one of the above-mentioned defects of the prior art.

[0011] To achieve the above object, the present application provides a backstop with a clutch device, comprising:

[0012] A housing, used to be connected to the rotating component and rotate around the rotation axis;

[0013] An inner ring, the inner ring is arranged in the outer shell and is fixed;

[0014] an outer ring disposed in the housing and radially outward of the inner ring;

[0015] A torque transmission assembly, the torque transmission assembly is arranged between the housing and the outer ring, the housing can rotate freely in a first rotation direction relative to the outer ring, and the torque transmission assembly is used to combine the housing and the outer ring and prevent the housing from rotating in a second direction relative to the outer ring;

[0016] A clutch device is provided between the inner ring and the outer ring, and the clutch device includes a closed state and an open state; in the closed state, the outer ring and the inner ring are connected as a whole, and in the open state, the outer ring can rotate relative to the inner ring.

[0017] Preferably, the clutch device comprises:

[0018] at least one outer disk connected to the radial inner surface of the outer ring and capable of free movement along the axial direction;

[0019] at least one inner disk connected to the radial outer surface of the inner ring and freely movable along the axial direction;

[0020] The outer disk and the inner disk have a combined state and a separated state. In the combined state, torque can be transmitted between the outer disk and the inner disk; in the separated state, the outer disk can rotate relative to the inner disk.

[0021] A pushing mechanism, the pushing mechanism is fixedly connected to the inner ring and is used to switch the outer disk and the inner disk between a combined state and a separated state;

[0022] A limiting cover plate is fixedly connected to the inner ring, and the limiting cover plate is arranged on a side of the outer disk or the inner disk away from the pushing mechanism, and is used to limit the axial movement of the outer disk or the inner disk.

[0023] Preferably, the pushing mechanism comprises:

[0024] A cylinder body, the cylinder body is fixedly connected to the axial end surface of the inner ring and forms a containing cavity with the inner ring;

[0025] A piston, wherein the piston is disposed in the accommodating cavity, and an oil cavity is formed between an axial end surface of the piston and the cylinder body;

[0026] A friction disc, the friction disc being used to apply axial pressure to the outer disc or the inner disc;

[0027] a spring assembly, one end of the spring assembly being in contact with the piston and the other end of the spring assembly being in contact with the friction disk;

[0028] By injecting pressurized oil into the oil chamber, the piston is moved axially to compress the spring assembly, thereby transmitting the axial pressure to the friction plate to apply axial pressure to the inner plate or the outer plate.

[0029] Preferably, the spring assembly comprises:

[0030] At least two guide rods, one end of each guide rod is fixedly connected to the friction disk, and the other end of each guide rod extends toward the piston, and each guide rod is evenly distributed in the circumferential direction of the friction disk;

[0031] A disc spring is sleeved on the guide rod, one side of the disc spring contacts the friction disc, and the other side contacts the piston.

[0032] Preferably, the pushing mechanism further comprises:

[0033] A pressure sensor is installed on the cylinder body and is used to detect the oil pressure in the oil chamber and upload it to a database.

[0034] Preferably, the pushing mechanism further comprises: a wear indicator pin, one end of which is fixedly connected to the piston in a detachable manner, and the other end of which passes through the cylinder body and extends outward for a certain length, and the wear indicator pin is provided with scale lines along its axial direction.

[0035] Preferably, an anti-wear ring is provided between one axial end surface of the outer ring and the limiting cover plate; and an anti-wear ring is provided between the other axial end of the outer ring and the cylinder body.

[0036] Preferably, it also comprises:

[0037] A first side plate, the first side plate is fixedly connected to an axial end surface of the housing and radially extends outward to form a connecting flange; a first skeleton oil seal is arranged between the inner hole of the first side plate and the outer ring;

[0038] a second side plate, the second side plate being fixedly connected to the other axial end surface of the housing, and a first skeleton oil seal being arranged between the inner hole of the second side plate and the outer ring;

[0039] The first skeleton oil seal is used to seal the lubricating oil in the accommodating cavity surrounded by the outer shell, the outer ring, the first side plate and the second side plate.

[0040] Preferably, a second skeleton oil seal is provided between the inner hole of the first side plate and the outer circle of the limiting cover plate, and the axial matching surface between the limiting cover plate and the outer ring is located between the first skeleton oil seal and the second skeleton oil seal;

[0041] A second skeleton oil seal is arranged between the inner hole of the second side plate and the outer circle of the cylinder body, and the axial matching surface between the cylinder body and the outer ring is located between the first skeleton oil seal and the second skeleton oil seal.

[0042] The present application also provides a permanent magnet drum, which includes the backstop with a clutch device as described above.

[0043] The beneficial effects of this application are:

[0044] The backstop with clutch device of the present application can control the state of the clutch device to switch the outer disk and the inner disk between the engagement state and the separation state, and can meet the rotation requirements in different directions; when the outer shell and the inner ring do not need to transmit torque, the outer disk and the inner disk are in a separation state, and the outer shell can rotate freely in two directions relative to the inner ring. When the outer shell and the inner ring need to transmit torque, the outer disk and the inner disk are in a combined state, and the outer shell can only rotate freely in one direction relative to the inner ring, and the other direction can achieve the backstop effect; if the torque transmitted in the state of the outer disk and the inner disk being combined exceeds the set value, the outer disk and the inner disk joint surface slip, and the backstop can be protected from damage at this time; if multiple backstops are installed, load balancing can be achieved between the multiple backstops at this time to reduce the models of the multiple backstops.

[0045] In addition, when the backstop of the present application is working, the inner ring is fixed, while the outer shell rotates with the equipment that needs to be backstopped, which is exactly the opposite of the structure of the existing backstop and can be applied to permanent magnet rollers of the latest technology.

[0046] Furthermore, the check valve with clutch device provided in the present application is also provided with a pressure sensor, which can detect the oil pressure applied to the piston. If oil leakage occurs, it can be dealt with in time, thereby improving safety performance.

[0047] Fourth, the present application is also provided with a wear indicator pin. If wear occurs between the outer disk and the inner disk, the amount of wear can be displayed by the scale on the wear indicator pin, so that the equipment can be maintained in time to ensure the ability to transmit torque between the outer disk and the inner disk.

[0048] Fifth, compared with the traditional check valve, the present application no longer needs to install a check lever arm separately, the installation is simple and convenient, and it is more suitable for on-site working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of a half-section structure of a backstop with a clutch device provided in one embodiment of the present application.

[0050] Figure 2 It is a structural schematic diagram of the connection between the backstop with a clutch device and the permanent magnet drum of the present application.

[0051] 1-housing; 2-inner ring; 3-outer ring; 4-torque transmission assembly; 5-clutch device; 51-outer plate; 52-inner plate; 53-pushing mechanism; 531-cylinder body; 532-piston; 533-friction plate; 534-spring assembly; 5341-guide rod; 5342-disc spring; 5312-oil chamber; 54-limiting cover plate; 55-pressure sensor; 6-anti-wear ring; 7-first side plate; 8-second side plate; 9-backstop with clutch device; 10-axis line; 11-permanent magnet roller; 91-quick-connector. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of this application are described in detail below in conjunction with the drawings.

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0054] like Figure 1 As shown, a schematic diagram of a half-section structure of a check valve with a clutch device according to an embodiment of the present application is shown. The check valve 9 with a clutch device is designed to be connected to a rotating component rotating around an axis 10, and the direction of rotation of the rotating component when it is working normally is defined as the positive direction. When the rotating component is started, the rotating component can be allowed to rotate in the opposite direction around the axis 10; after starting, when the rotating component is in a normal working state, it is used to prevent the rotating component from rotating in the opposite direction around the axis 10; when the rotating component is overloaded in the working state, the check valve 9 with a clutch device can allow the rotating component to reverse around the axis 10 again. The check valve 9 with a clutch device comprises a housing 1, an inner ring 2, an outer ring 3, a torque transmission assembly 4, a clutch device 5, a first side plate 7, a second side plate 8 and a seal.

[0055] The structure of the housing 1 is annular and is used to be connected to a rotating component and rotate around a rotation axis 9; the rotating component may be a permanent magnet drum. The housing 1 may be directly fixedly connected to the rotating component of the permanent magnet drum, or may be connected to the rotating component of the permanent magnet drum through an intermediate component. The rotation axis refers to the axis around which the rotating component rotates.

[0056] The inner ring 2 is arranged in the outer shell 1 and is fixed; in this embodiment, the outer circle of the inner ring 2 has a shoulder structure in the axial direction, and an external spline is processed on the larger diameter of the outer circle, and the external spline is used to cooperate with the components in the clutch device 5.

[0057] The outer ring 3 is arranged in the housing 1 and radially outward of the inner ring 2; the outer ring 3 is arranged as an annular structure, the inner hole of the outer ring 3 is arranged as a stepped hole with a variable diameter, the diameter of the middle hole section is smaller than the hole diameter of the hole sections at both ends, and an internal spline is arranged on the inner surface of the middle hole section, and the internal spline is used to cooperate with the components in the clutch device 5. The diameter of the hole sections at both ends is larger than the major diameter of the internal spline.

[0058] The outer circle of the outer ring 3 and the inner diameter of the outer shell 1 form a raceway, and the raceway is used to install the torque transmission component 4. The torque transmission component 4 is arranged between the outer shell 1 and the outer ring 3. The outer shell 1 can rotate freely in the first rotation direction relative to the outer ring 3 (for example, clockwise facing the shaft end). The torque transmission component 4 is used to combine the outer shell 1 and the outer ring 3 and prevent the outer shell 1 from rotating in the second direction relative to the outer ring 3 (i.e. reverse, counterclockwise facing the shaft end at this time); the torque transmission component 4 is provided with limit blocks on both axial sides to limit the axial movement of the torque transmission component 4. In this embodiment, the structure of the torque transmission component 7 and the limit blocks is the same as that of the existing backstop, which will not be repeated here.

[0059] A clutch device 5 is provided between the inner ring 2 and the outer ring 3, and the clutch device 5 includes a closed state and an open state; in the closed state, the outer ring 3 and the inner ring 2 are connected as a whole, and in the open state, the outer ring 3 can rotate relative to the inner ring 2.

[0060] In this embodiment, the outer shell 1 and the rotating component are radially positioned and fixedly connected through a stopper. As the rotating component rotates, the outer ring 3 is supported radially by the torque transmission assembly 7 of the outer shell 1, and the inner ring 2 is fixedly mounted on the shaft. The inner ring 2 is connected to the outer ring 3 through the above-mentioned clutch device, thereby meeting the working requirements of the outer shell 1, that is, whether the outer shell 1 can rotate in both directions relative to the inner ring or only in one direction.

[0061] The clutch device 5 includes an outer disk 51 , an inner disk 52 , a pushing mechanism 53 and a limiting cover plate 54 .

[0062] At least one outer disk 51 is provided, and the radial outer circle of the outer disk 51 is provided with an external spline, which is matched and connected with the internal spline provided on the inner surface of the outer ring and can move freely along the direction of the axis 10.

[0063] At least one inner disk 52 is provided, and the inner hole of the inner disk 52 is provided with an internal spline, which is matched and connected with the external spline provided on the radial outer surface of the inner ring and can move freely along the axial direction.

[0064] In this embodiment, the outer disk is set to 8 pieces and the inner disk is set to 7 pieces; the outer disk 51 is set to be a friction plate, and the number is generally 6 to 16 pieces, an even number; the inner disk is set to be a steel plate, and the number is 1 less than the outer disk; the outer disk and the inner disk are alternately arranged in the direction of the axis 10.

[0065] The outer disk 51 and the inner disk 52 have a combined state and a separated state. In the combined state, the outer disk 51 and the inner disk 52 are pressed by the pushing mechanism 53, and torque can be transmitted between the two. In the separated state, the pressing force between the outer disk 51 and the inner disk 52 is eliminated, and the outer disk 51 can rotate relative to the inner disk 52.

[0066] It can be understood that the separation state described in this embodiment refers to the disappearance of the pressing force used to transmit torque between the outer disk and the inner disk, and has nothing to do with whether the outer disk and the inner disk are in contact or completely separated.

[0067] The pushing mechanism 53 is fixedly connected to an axial end face of the inner ring 2, and is used to switch the outer disk 51 and the inner disk 52 between the combined state and the separated state; it can be understood that the pushing mechanism 53 can be a hydraulic pushing mechanism or an electromagnetic pushing mechanism; it can be a manual pushing mechanism or an automatic pushing mechanism.

[0068] The limiting cover plate 54 is fixedly connected to the inner ring 2 and is disposed on a side of the outer disk 51 or the inner disk 52 away from the pushing mechanism 53 to limit the axial movement of the outer disk or the inner disk.

[0069] In this embodiment, the limit cover plate 54 is set as an annular plate structure, and one axial end face of the annular plate structure is fixedly connected to one end face of the inner ring 2 by bolts in a detachable manner, and a sealing ring is provided between the axial connection surfaces. The limit cover plate 54 and the inner ring 2 are radially positioned by the stopper in the radial direction. The radial portion of the limit cover plate 54 close to the outer circle is provided with another stopper, which is matched with the end face and the inner hole of the outer ring. It can be understood that the end face of the stopper and the two radial matching surfaces are both large clearance matching, and the matching surfaces are not directly in contact with each other.

[0070] In this embodiment, an anti-wear ring 6 is arranged between the axial mating surface of the limit cover plate 54 and the outer ring 3. The anti-wear ring 6 can be a non-metallic part, such as nylon, polyurethane or polytetrafluoroethylene, or a metal part, such as a wear-resistant copper sleeve, or a thrust bearing.

[0071] It is understandable that an anti-wear ring, rolling bearing or needle roller and cage assembly can also be arranged between the radial mating surface of the limit cover plate 54 and the outer ring 3; wherein the anti-wear ring 6 can be a non-metallic part, such as nylon, polyurethane or polytetrafluoroethylene, or a metal part, such as a wear-resistant copper sleeve. The advantage is that the wear caused by abnormal contact between the limit cover plate and the outer ring 3 can be prevented.

[0072] The free rotation described in this embodiment is not unconditional free rotation. For example, in some cases, it may be necessary to rotate freely when the outer disk and the inner disk are separated. The free rotation only means that when the conditions for rotation are met, it can rotate.

[0073] The direction of the axis 10 described in this embodiment refers to the axial direction, that is, Figure 1 The left-right orientation of the example.

[0074] In this embodiment, the pushing mechanism 53 includes a cylinder 531 , a piston 532 , a friction plate 533 and a friction assembly 534 .

[0075] The cylinder body 531 has an inner hole for installation, including an axial baffle portion and a radial annular portion. The portion extending radially outward from the inner hole portion to the outer circle portion of the cylinder body is the axial baffle portion, and the remaining portion is the radial annular portion. The axial baffle portion and the radial annular portion are integrally formed. The cylinder body 531 is fixedly connected to the axial end face of the inner ring 2 through the axial baffle portion, and a sealing ring is provided between the axial mating surfaces. The connection between the axial baffle portion and the inner ring 2 is provided with a stopper for radial positioning. The outer circle of the inner ring 2, the axial baffle portion and the radial annular portion form a receiving cavity, which is used to install the piston 532.

[0076] The piston 532 is arranged in the accommodating cavity, and an oil cavity 5312 is formed between an axial end face of the piston 532 and the cylinder body. In this embodiment, the outer circle of the piston 532 is matched with the inner hole of the radial annular portion, and a sealing ring is arranged between the matching surfaces; the inner hole of the piston 532 is matched with the outer circle portion of the inner ring 2, and a sealing ring is arranged between the matching surfaces; the end face of the piston 532 close to the axial baffle portion is provided with an annular groove, and the oil cavity 5312 is formed after being matched with the axial baffle portion; it is understandable that an annular groove can also be provided on the axial baffle portion, and the oil cavity is formed after being matched with the end face of the piston.

[0077] In this embodiment, the end face of the radial annular portion away from the axial baffle portion is matched with the end face of the outer ring 3, and an anti-wear ring 6 is arranged between the matching surfaces. The anti-wear ring 6 can be a non-metallic part, such as nylon, polyurethane or polytetrafluoroethylene, or a metal part, such as a wear-resistant copper sleeve, or a thrust bearing.

[0078] The friction disc 533 is used to apply axial pressure to the outer disc 51 or the inner disc 52 so that the outer disc 51 and the inner disc 52 are pressed against each other, thereby transmitting torque.

[0079] One end of the spring assembly 534 contacts the piston 532 , and the other end contacts the friction plate 533 .

[0080] An oil inlet and an oil outlet connected to the oil chamber 5312 are provided on the cylinder body 531. By injecting pressurized oil into the oil chamber, the piston is moved axially to compress the spring assembly, and the axial pressure is then transmitted to the friction plate to apply axial pressure to the inner plate or the outer plate.

[0081] In this embodiment, the spring assembly 534 includes a guide rod 5341 and a disc spring 5342 .

[0082] There are two guide rods 5341, one end of which is fixedly connected to the friction disk, and the other end of which extends toward the piston. The guide rods are evenly distributed in the circumferential direction of the friction disk.

[0083] The disc spring 5342 is sleeved on the guide rod, with one side in contact with the friction disk and the other side in contact with the piston.

[0084] When pressure oil is injected into the oil chamber 5312 through the oil inlet, the pressure forces the piston 532 to move to the left, thereby compressing the disc spring 5342. The disc spring 5342 transmits force to the friction disc 533, and the friction disc 533 presses the inner disc and the outer disc together to transmit torque. When the pressure oil in the oil chamber 5312 is discharged through the oil outlet, the compression force acting on the disc spring disappears, the disc spring recovers its deformation, and the piston 532 is reset. The pressure between the outer disc 51 and the inner disc 52 disappears, and the torque is no longer transmitted, and they can rotate relative to each other. The outer shell 1 can rotate in the opposite direction relative to the inner ring 2. The reverse direction means that, for example, the permanent magnet roller rotates clockwise during normal operation, the outer shell 1 rotates freely with the permanent magnet roller, and the inner ring 2 is fixed on the roller shaft and remains stationary; because the permanent magnet roller will reverse when it is started (i.e., counterclockwise), it is necessary to use the clutch device to enable the outer shell 1 to have the ability to rotate relative to the inner ring 2 before starting the permanent magnet roller. The clutch device 5 is in a normally closed state, that is, the outer disk 51 and the inner disk 52 are always in a combined state. Before the permanent magnet drum is started, the pressure oil in the oil chamber 5312 can be discharged through the oil outlet, the compression deformation of the butterfly spring is restored, the outer disk and the inner disk are in a separated state, and the outer shell 1 can rotate forward or reverse relative to the inner ring 2; when the permanent magnet drum is started, it starts to rotate clockwise normally. At this time, pressure oil can be injected into the oil chamber again through the oil inlet. At the same time, the piston moves to the left, applying a pressing force to the outer disk 51 and the inner disk 52, and the outer disk 51 and the inner disk 52 begin to transmit torque. The outer ring 3 is restricted by the outer disk 51 and remains stationary, and a roller is provided on the torque transmission component 7 between the outer shell 1 and the outer ring 3, so at this time, the outer shell 1 can rotate freely in one direction relative to the outer ring 3 and the inner ring 2, and the inner ring 2 and the outer ring 3 remain stationary. The no-load start of the permanent magnet drum is completed.

[0085] In this embodiment, the pushing mechanism further includes a pressure sensor 55, which is installed on the cylinder body and is used to detect the oil pressure in the oil chamber and upload it to the database. The pressure sensor 55 can be a wireless pressure sensor or a wired pressure sensor. Specifically, the pushing mechanism includes a data receiving and transmitting gateway, a control system and a hydraulic pump station. The pressure sensor 55 sends the monitored pressure value in the oil chamber to the gateway, and the gateway uploads the data to the cloud database and the control system. When the pressure value is lower than the working pressure, the control system controls the hydraulic pump station to supply oil to the oil chamber to increase the pressure to within the working permission range. Its advantage is that the pressing force between the outer disk 51 and the inner disk 52 is guaranteed by the pressure in the oil chamber 5312. If the pressure oil in the oil chamber 5312 leaks, the pressing force between the outer disk and the inner disk will be insufficient, causing safety problems. After adding a pressure sensor, this problem can be well solved. By setting the pressure alarm value, when the pressure value is lower than the set safety value, an alarm prompt can be issued for detection and maintenance. After the pressure sensor uploads the pressure value to the database, remote monitoring can be achieved.

[0086] In this embodiment, the thrust adjustment mechanism further comprises: a wear indicator pin ( Figure 1 (not shown), one end of the wear indicator pin is fixedly connected to the right end face of the piston 532 in a detachable manner, and the other end passes through the axial baffle portion along the direction of the axis 10 and extends outward for a certain length, and the wear indicator pin is provided with scale lines along its axial direction. When wear occurs between the outer disk and the inner disk, resulting in a decrease in the thickness of the outer disk and / or the inner disk, the piston 532 will move to the left under the action of the oil pressure, and the length of the wear indicator pin extending out of the thrust adjustment mechanism will decrease. According to the scale value on the wear indicator pin, the torque value that the outer disk and the inner disk can currently transmit can be determined; thereby determining whether equipment maintenance is required.

[0087] In this embodiment, the backstop with clutch device further includes a first side plate 7 and a second side plate 8 .

[0088] The first side plate 7 is set as a disc structure, and the first side plate is fixedly connected to an axial end face of the housing 1 through an axial side surface, and the connection between the first side plate 7 and the housing 1 is also provided with a stopper for radial positioning; the outer circle of the first side plate 7 radially extends outward to form a connecting flange for connecting with a rotating component; a first skeleton oil seal 71 is provided between the inner hole of the first side plate 7 and the outer ring;

[0089] The second side plate 8 is set as a disc structure, and the second side plate 8 is fixedly connected to the other axial end surface of the housing 1 through the axial side surface, and the connection between the second side plate 8 and the housing 1 is also provided with a stopper for radial positioning; a first skeleton oil seal 71 is provided between the inner hole of the second side plate and the outer ring;

[0090] The first skeleton oil seal 71 is used to seal the lubricating oil in the accommodating cavity surrounded by the housing 1 , the outer ring 3 , the first side plate 7 and the second side plate 8 .

[0091] It is understandable that the first skeleton oil seal 71 between the inner hole of the first side plate 7 and the outer ring 3 can also be moved to the left ( Figure 1 The first skeleton oil seal 71 between the inner hole of the second side plate 8 and the outer ring 3 can also be arranged to the right ( Figure 1 ), arranged on the right side of the axial mating surface between the cylinder body 531 and the outer ring 3; its advantage is that only two left and right skeleton oil seals are needed to simultaneously seal the cavity where the torque transmission assembly 4 is located and the cavity where the outer disk 51 and the inner disk 52 are located.

[0092] In this embodiment, a second skeleton oil seal 72 is arranged between the inner hole of the first side plate 7 and the outer circle of the limiting cover plate 54, and the axial matching surface between the limiting cover plate 54 and the outer ring 3 is located between the first skeleton oil seal 71 and the second skeleton oil seal 72; a second skeleton oil seal 72 is arranged between the inner hole of the second side plate 8 and the outer circle of the cylinder body 531, and the axial matching surface between the cylinder body and the outer ring is located between the first skeleton oil seal 71 and the second skeleton oil seal 72. The advantage is that the sealing of the cavity where the torque transmission component 4 is located and the cavity where the outer disk 51 and the inner disk 52 are located are relatively independent, which is convenient for distinguishing and processing.

[0093] A plurality of oil holes are provided on the radial outer surface of the housing 1 for replacing the lubricating oil in the space where the torque transmission assembly 4 is located and installing the exhaust valve. Similarly, a plurality of oil holes are provided on the radial outer surface of the limit baffle 54 for spraying coolant on the outer disk 51 and the inner disk 52 and installing the exhaust valve.

[0094] In order to ensure that the backstop has a more stable performance during operation, after the backstop is installed, its inner ring needs to be axially positioned to limit the movement of the inner ring in the direction of the axis 9.

[0095] The backstop with clutch device of the present application can be converted between the combined state and the separated state through the outer disk 51 and the inner disk 52, which can meet the rotation requirements in different directions; when the outer shell 1 and the inner ring 2 do not need to transmit torque, the outer disk 51 and the inner disk 52 are in a separated state, and the outer shell 1 can rotate freely in two directions relative to the inner ring 2. When the outer shell 1 and the inner ring 2 need to transmit torque, the outer disk 51 and the inner disk 52 are in a combined state, and the outer shell 1 can only rotate freely in one direction relative to the inner ring 2, and the other direction realizes the backstop effect; if the torque transmitted in the combined state of the outer disk 51 and the inner disk 52 exceeds the set value, the outer disk 51 and the inner disk 52 joint surface slip occurs, and the backstop can be protected from damage at this time; if multiple backstops are installed, then the load can be balanced among the multiple backstops at this time to reduce the models of the multiple backstops.

[0096] In addition, when the backstop of the present application is working, the inner ring 2 is fixed, while the outer shell 1 rotates with the equipment, which is exactly opposite to the structure of the existing backstop and can be applied to the permanent magnet roller of the latest technology.

[0097] Furthermore, the check valve with clutch device provided in the present application is also provided with a pressure sensor, which can detect the oil pressure applied to the piston. If oil leakage occurs, it can be dealt with in time, thereby improving safety performance.

[0098] Fourth, the present application is also provided with a wear indicator pin. If wear occurs between the outer disk and the inner disk, the amount of wear can be displayed by the scale on the wear indicator pin, so that the equipment can be maintained in time to ensure the ability to transmit torque between the outer disk and the inner disk.

[0099] Fifth, compared with the traditional check valve, the present application no longer needs to install a check lever arm separately, the installation is simple and convenient, and it is more suitable for on-site working conditions.

[0100] The present application also provides a permanent magnet roller, such as Figure 2As shown, the permanent magnet drum includes a check valve with a clutch device as described above. The figure only shows the connection between the check valve and the permanent magnet drum, which can be connected to the side plate of the permanent magnet drum. Since the clutch device in the check valve 9 with a clutch device is fixedly connected to the inner ring, and the inner ring 2 is connected to the drum shaft of the permanent magnet drum by a key, the clutch device will not rotate, which creates conditions for the clutch device to connect to the pump station. For example, the permanent magnet drum rotates clockwise during normal operation, the outer shell 1 rotates freely with the permanent magnet drum, and the inner ring 2 is fixed on the drum shaft and remains stationary; since the permanent magnet drum will reverse when it is started (i.e., counterclockwise), it is necessary to use the clutch device to enable the outer shell 1 to have the ability to rotate relative to the inner ring 2 before starting the permanent magnet drum. The clutch device 5 is in a normally closed state, that is, the outer disk 51 and the inner disk 52 are always in a combined state. Before the permanent magnet roller is started, the pressure oil in the oil chamber 5312 can be discharged through the oil outlet, the compression deformation of the butterfly spring is restored, the outer disk and the inner disk are in a separated state, and the outer shell 1 can rotate forward or reverse relative to the inner ring 2; when the permanent magnet roller is started, it starts to rotate clockwise normally. At this time, the pressure oil can be injected into the oil chamber again through the oil inlet. At the same time, the piston moves to the left, applying a pressing force to the outer disk 51 and the inner disk 52, and the torque begins to be transmitted between the outer disk 51 and the inner disk 52. The outer ring 3 is restricted by the outer disk 51 and remains stationary, and a roller is provided on the torque transmission component 7 between the outer shell 1 and the outer ring 3, so at this time, the outer shell 1 can rotate freely in one direction relative to the outer ring 3 and the inner ring 2, and the inner ring 2 and the outer ring 3 are stationary. The no-load start of the permanent magnet roller is completed. The oil inlet and the oil outlet on the cylinder body are connected to the pump station through the quick plug connector 91.

[0101] In order to ensure that the backstop has a more stable performance during operation, after the backstop is installed, its inner ring needs to be axially positioned to limit the movement of the inner ring in the direction of the axis 9.

[0102] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A backstop with a clutch device, characterized in that: include: A housing (1) configured to be connected to a rotating component and to rotate about a rotation axis; An inner ring (2), the inner ring (2) being arranged in the outer shell (1) and being fixed; An outer ring (3), the outer ring (3) being arranged in the housing (1) and radially outward of the inner ring (2); a torque transmission assembly (4), the torque transmission assembly being arranged between the outer shell and the outer ring, the outer shell being able to rotate freely in a first rotation direction relative to the outer ring, the torque transmission assembly being used to combine the outer shell and the outer ring and prevent the outer shell from rotating in a second direction relative to the outer ring; A clutch device (5) is provided between the inner ring (2) and the outer ring (3), and the clutch device comprises a closed state and an open state; in the closed state, the outer ring (3) and the inner ring (2) are connected as a whole, and in the open state, the outer ring (3) can rotate relative to the inner ring (2); Wherein, the clutch device (5) comprises: at least one outer disk (51), the outer disk (51) being connected to the radial inner surface of the outer ring and being able to move freely along the axial direction; At least one inner disk (52), the inner disk (52) being connected to the radial outer surface of the inner ring and being able to move freely along the axial direction; The outer disk and the inner disk have a combined state and a separated state. In the combined state, torque can be transmitted between the outer disk and the inner disk; in the separated state, the outer disk can rotate relative to the inner disk. a pushing mechanism (53), the pushing mechanism being fixedly connected to the inner ring and used for switching the outer disk and the inner disk between a combined state and a separated state; A limiting cover plate (54), the limiting cover plate (54) being fixedly connected to the inner ring (2), the limiting cover plate (54) being arranged on a side of the outer disk or the inner disk away from the pushing mechanism, and being used to limit the axial movement of the outer disk or the inner disk.

2. The backstop with a clutch device according to claim 1, characterized in that: The pushing mechanism (53) comprises: A cylinder body (531), the cylinder body (531) being fixedly connected to the axial end surface of the inner ring and forming an accommodating cavity with the inner ring; A piston (532), the piston being arranged in the accommodating cavity, and an oil cavity (5312) being formed between an axial end surface of the piston and the cylinder body; A friction disc (533), the friction disc being used to apply axial pressure to the outer disc or the inner disc; a spring assembly (534), one end of the spring assembly being in contact with the piston and the other end of the spring assembly being in contact with the friction disk; By injecting pressurized oil into the oil chamber, the piston is moved axially to compress the spring assembly, thereby transmitting the axial pressure to the friction plate, so as to apply axial pressure to the inner plate or the outer plate.

3. The backstop with clutch device according to claim 2, characterized in that: The spring assembly (534) comprises: at least two guide rods (5341), one end of each guide rod being fixedly connected to the friction disk and the other end of each guide rod extending in the direction of the piston, and each guide rod being evenly distributed in the circumferential direction of the friction disk; A disc spring (5342), wherein the disc spring is sleeved on the guide rod, one side of the disc spring is in contact with the friction disk, and the other side of the disc spring is in contact with the piston.

4. The backstop with clutch device according to claim 3, characterized in that: The driving mechanism further comprises: A pressure sensor (55) is mounted on the cylinder body and is used to detect the oil pressure in the oil chamber and upload it to a database.

5. The backstop with clutch device according to claim 4, characterized in that: The pushing mechanism further comprises: a wear indicating pin, one end of which is fixedly connected to the piston in a detachable manner, and the other end of which passes through the cylinder body (531) and extends outward for a certain length, and the wear indicating pin is provided with scale lines along its axial direction.

6. The backstop with clutch device according to claim 5, characterized in that: An anti-wear ring (6) is provided between one axial end surface of the outer ring and the limiting cover plate; and an anti-wear ring (6) is provided between the other axial end of the outer ring and the cylinder body.

7. The backstop with clutch device according to claim 6, characterized in that: Also includes: a first side plate (7), the first side plate being fixedly connected to an axial end surface of the housing and extending radially outward to form a connecting flange; a first skeleton oil seal (71) being arranged between the inner hole of the first side plate and the outer ring; a second side plate (8), the second side plate being fixedly connected to the other axial end surface of the housing, a first skeleton oil seal (71) being provided between the inner hole of the second side plate and the outer ring; The first skeleton oil seal (71) is used to seal the lubricating oil in the accommodating cavity surrounded by the outer shell, the outer ring, the first side plate and the second side plate.

8. The backstop with clutch device according to claim 7, characterized in that: A second skeleton oil seal (72) is arranged between the inner hole of the first side plate and the outer circle of the limiting cover plate, and the axial matching surface between the limiting cover plate and the outer ring is located between the first skeleton oil seal and the second skeleton oil seal; A second skeleton oil seal is arranged between the inner hole of the second side plate and the outer circle of the cylinder body, and the axial matching surface between the cylinder body and the outer ring is located between the first skeleton oil seal and the second skeleton oil seal.

9. A permanent magnet roller, characterized in that: The permanent magnet roller comprises a backstop with a clutch device as claimed in any one of claims 1 to 8.

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