CN217422021U - Reel energy-absorbing assembly - Google Patents

Abstract

The utility model discloses a reel energy-absorbing assembly, which comprises a first fixed seat, a second spring with one end acting on the first fixed seat, and a baffle ring arranged at the other end of the second spring, wherein a second bearing is arranged between the baffle ring and the second spring, and the second bearing is a thrust bearing which enables the baffle ring to rotate relatively to the second spring; the shapes and sizes of the second spring, the second bearing and the baffle ring meet the following requirements: the three may be arranged coaxially. When the energy absorption assembly provided by the scheme is applied to the control rod driving mechanism, the reliability of the performance of the control rod driving mechanism can be ensured.

Description

Reel energy-absorbing assembly

Technical Field

The utility model relates to a control rod drive mechanism technical field especially relates to a reel energy-absorbing subassembly.

Background

The control rod driving mechanism is used for driving the control rod assembly to move up and down in the reactor core, so that important functions of starting, power regulation, safe shutdown and the like of the reactor are realized. In the prior art, the manner in which the reactor control rod drive mechanism drives the control rods generally includes: hook drive type, drag chain (chain) drive type, and wire rope drive type. In the wire rope driving mode, a driving motor is generally adopted to drive a winding drum to rotate around a lead screw, the lead screw moves along the axis of the lead screw in the rotation process of the lead screw around the axis of the lead screw, a wire rope is wound on the winding drum, and a control rod assembly is lifted or inserted in the rotation process of the winding drum.

In the patent application No. CN202111412631.0, the utility model discloses in the creation name is an open reactor's control rod drive's patent application file, provide a control rod drive including electromagnetic clutch, specific beneficial effect relates to the dead weight that utilizes the control rod subassembly, and under electromagnetic clutch power-off state, the control rod can rely on self gravity whereabouts to make and can realize falling the stick rapidly after the power failure trouble appears, guarantee the security of reactor. Meanwhile, in the technical scheme, the control rod is connected with the winding drum through a steel wire rope.

According to the rod falling characteristic of a control rod in a nuclear reactor, a technical scheme beneficial to improving the working reliability of a control rod driving mechanism is provided, and the method has important significance for the development of nuclear power technology in China.

SUMMERY OF THE UTILITY MODEL

The technical scheme who provides a be favorable to promoting control rod drive mechanism operational reliability to the aforesaid, the technical problem that has important meaning to the development of china's nuclear power technology, the utility model provides a reel energy-absorbing component. When the energy absorption assembly provided by the scheme is applied to the control rod driving mechanism, the reliability of the performance of the control rod driving mechanism can be ensured.

To the above problem, the utility model provides a pair of reel energy-absorbing subassembly comes the solution problem through following technical essential: a reel energy absorption assembly comprises a first fixed seat, a second spring and a baffle ring, wherein one end of the second spring acts on the first fixed seat, the baffle ring is arranged at the other end of the second spring, a second bearing is arranged between the baffle ring and the second spring, and the second bearing is a thrust bearing which enables the baffle ring to rotate relative to the second spring;

the shapes and sizes of the second spring, the second bearing and the baffle ring meet the following requirements: the three may be arranged coaxially.

In the prior art, the mode of realizing the emergency shutdown of the nuclear reactor comprises a mode of adopting a control rod to drop the rod emergently, taking the technical scheme provided by the application number of CN202111412631.0 as an example, after the electromagnetic clutch is disconnected, the control rod falls under the action of self gravity, because the upper end of the control rod is connected with the steel wire rope, the steel wire rope is partially wound on the winding drum, the winding drum is dragged by the steel wire rope to rotate in the falling process of the control rod, the rotating speed of the winding drum is related to the falling speed of the control rod, and in the process that the control rod falls under the self weight and the specific falling height without being blocked, it is possible to accelerate the drum to a speed much greater than the speed of rotation of the drive mechanism (typically using a drive motor), and, when the control rods are engaged with the buffer mechanism in the pressure vessel, the drum will rotate further under its own inertia, at which point the wire rope released by the drum will change from a taut state to a slack state. Because the driving motor generally drives the drum to rotate through the reducer, a plurality of gear sets for realizing speed reduction transmission are generally arranged on the driving mechanism, meanwhile, in order to further accurately position the fixed-point release of the steel wire rope, a guide gear set for restraining the position of the steel wire rope in the space is generally arranged, after the control rod is dropped, the drum continues to rotate to further release the steel wire rope, a section of loose steel wire rope is formed between the release position of the steel wire rope on the drum and the guide gear set, the shape and the position of the section of steel wire rope are uncontrollable, and when the steel wire rope and other parts on the control rod driving mechanism are hooked or enter the meshing position of the gear sets, the steel wire rope cannot be wound on the drum at the later stage and even is damaged or cut off by the gears meshed with each other, so that the reliability of the performance of the drum assembly and the control rod driving mechanism is influenced.

The reel that this scheme was decided according to the cooperation characteristics of lead screw and reel continues to rotate the in-process and will continue the characteristics of moving along the lead screw axis, has set up an energy-absorbing subassembly, and concrete theory of operation does: install this energy-absorbing component in the place ahead of direction of motion when reel release wire rope, simultaneously, keep off the terminal surface of ring orientation reel, like this, rotate and along the in-process of lead screw axis further motion when the reel with the direction of rotation of releasing wire rope, because this energy-absorbing component sets up the place ahead at reel direction of motion, when the reel with keep off the ring and take place to contact and when extrudeing, transmit thrust through the second bearing and make the second spring compressed, further be extruded along lead screw axis motion in-process second spring at the reel, force the reel stop rotation and translate along self axis until under this energy-absorbing component's effect. Compared with the method that rigid constraints are arranged at the end parts of the winding drum, the energy absorption assembly can effectively prevent the end surface of the winding drum, the upper part of the winding drum and a thread pair between the winding drum and a lead screw from being damaged due to impact; compared with a winding drum which does not have other constraint rotation under inertia, the energy absorption assembly converts kinetic energy on the winding drum into elastic potential energy of the second spring, so that the length of a steel wire rope continuously released from the winding drum after a control rod falls off is shortened, the length of a steel wire rope relaxation section is reduced, the possibility of the steel wire rope being hooked is reduced, the steel wire rope enters a gear shaft meshing area, meanwhile, the corresponding lead screw is generally a ball lead screw, and part or all of the relaxation section of the winding drum which can reversely rotate on a winding steel wire rope is pushed down by the second spring in the reverse direction after the movement speed of the winding drum is 0, so that the winding drum assembly is improved, and the reliability of a control rod driving mechanism is improved. The second bearing enables the winding drum to rotate relative to the second spring, so that abrasion caused by sliding friction of parts on the control rod drive mechanism and the winding drum due to torque is avoided, and the purpose of prolonging the service life of the control rod drive mechanism is achieved.

The three coaxial devices are arranged coaxially with the lead screw, so that the situation that the winding drum is subjected to force from the baffle ring deviating from the axis of the lead screw to cause excessive wear of the single side of the thread pair between the winding drum and the lead screw is avoided.

As a further technical scheme of the reel energy absorption assembly:

among the prior art, the lead screw is generally installed on the reel subassembly with the mode that both ends supported, and the position of reel on the lead screw axis is located between the both ends of lead screw, can regard as the mount pad with this energy-absorbing component to simplify control rod drive mechanism's structure and make things convenient for this energy-absorbing component assembly, set up to: and each of the three parts is provided with a central hole, and when the three parts are coaxially arranged, the central holes of the three parts are coaxial. In the scheme, the central holes of the three are used for the lead screw to penetrate, the three are assembled at different axial positions of the lead screw, the first fixing seat is fixed on the lead screw by controlling the aperture of the central hole and/or the outer diameter of a shaft section corresponding to the lead screw, the inner diameter of the central hole of the second spring is larger than the outer diameter of the shaft section of the lead screw at the inner side of the second spring, the thrust gasket at one end of the second bearing close to the second spring is fixed relative to one end of the second spring far away from the first fixing seat, the thrust gasket at one end of the second bearing close to the retaining ring is larger than the outer diameter of the shaft section of the lead screw at the inner side of the second bearing, the thrust gasket at one end of the second bearing close to the retaining ring is embedded and fixed in the retaining ring to realize the position positioning in the radial direction of the lead screw, and the retaining ring is rotatably and slidably sleeved at the outer side of the lead screw.

As a technical scheme of simple structure, small, convenient assembly, set up to: the first fixed seat is of a cylindrical structure with an opening at one end and an end plate at one end, and the second spring acts on the inner side of the end plate;

be provided with the centre bore on the end plate, the three can assemble with first fixing base and be: the central hole on the end plate is coaxial with the central holes of the end plate, the end plate and the end plate;

the end plate is also provided with an internal thread hole which extends from the outer side of the end plate to the hole wall of the central hole in the end plate, and a second set screw is connected to the internal thread hole in a threaded manner. This scheme provides a concrete structure form that makes things convenient for first fixing base to fix on the lead screw, through rotating the second holding screw, utilizes the effort of second holding screw terminal surface and lead screw surface to accomplish first fixing base fixed on the lead screw, the first fixing base tube-shape casing in the second spring outside not only can be used to protect the second spring, can regard as simultaneously as following the supporting body of ring channel, four above centre bores are used for with this energy-absorbing component coaxial arrangement on the lead screw.

As a technical scheme for restraining the position of the second bearing in the radial direction of the screw by utilizing the position of the baffle ring in the radial direction of the screw, the device is characterized in that: the central hole on the retaining ring is a stepped hole, and the thrust washer at one end of the second bearing close to the retaining ring is fixed in the stepped hole. In specific implementation, the step hole on the baffle ring is preferably provided with two step faces, the two step faces enable the step hole to be provided with three sections of hole sections, wherein the inner diameters of the hole sections at two ends are larger than the inner diameter of the hole section in the space, the screw rod is arranged to be a step shaft, therefore, the hole section close to the second bearing is used for positioning the corresponding thrust washer in the axial direction and the radial direction of the baffle ring, the step face of the hole section at the other end is used for being matched with the step face on the screw rod, and the energy absorption assembly is limited at a specific axial position on the screw rod axial line by utilizing the first fixing seat fixed in position on the screw rod axial line.

As a small, through the spacer ring transmission power, can avoid the second spring because the deformation leads to the pressurized position dislocation, finally leads to the second spring to produce the sudden change at deformation in-process elastic force and causes the reel to receive the technical scheme who assaults, sets up to: the second spring is formed by stacking a plurality of disc springs, and a space ring is arranged between any two adjacent disc springs; the outer diameter of the space ring is larger than or equal to that of the disc spring, and the adjacent disc springs transmit force through the space ring. When the scheme is specifically implemented, aiming at the assembly mode that the second spring is sleeved on the lead screw, the space ring is set to be of an annular structure, and the inner diameter of the central hole in the space ring is larger than the outer diameter of the shaft section of the lead screw on the inner side of the space ring.

Be different from traditional field, the installation space that sets up for each spare part when nuclear reactor structural design is limited, simultaneously, the second spring generally works in the environment that is higher than the room temperature, for the compressive capacity of control second spring in order to avoid the life of its single load size that work bore in order to prolong the second spring, sets up to: the control device is used for controlling the elastic compression amount of the second spring, and the elastic compression amount is the elastic compression amount of the second spring in the axial direction of the second spring;

the control device comprises a second fixing seat and a resistance piece, wherein the resistance piece provides resistance for the second fixing seat to move relative to the first fixing seat along the axis of the first fixing seat through shearing or pressing. As a person skilled in the art, the above control device can achieve the corresponding purpose by bearing part of or all the thrust from the winding drum at a certain moment in the process that the second spring is elastically deformed under the action of the winding drum, and the person skilled in the art can adopt various forms of control devices without creative labor.

As a specific implementation form, the method comprises the following steps: the first fixed seat is of a cylindrical structure with an opening at one end, and the second spring is partially or completely positioned in an inner hole of the first fixed seat;

an annular groove extending along the circumferential direction of the first fixed seat is further formed in the outer side surface of the first fixed seat;

the inner wall of the second fixing seat is positioned on the outer side of the outer wall of the first fixing seat, a pore canal with an orifice is further arranged on the second fixing seat, the control device further comprises a steel ball embedded in the pore canal, and a first spring for applying thrust to the steel ball is further arranged in the pore canal so that the surface of the steel ball is in contact with the outer wall;

the sizes of the pore passage, the steel ball and the annular groove respectively meet the following requirements: in the process that the second fixing seat moves along the axis of the first fixing seat in the direction of compressing the second spring, the steel ball can be extruded into the annular groove under the action of the first spring, and at the moment, the steel ball is used as a part for bearing shearing stress between the first fixing seat and the second fixing seat. According to the scheme, the control device is arranged on the basis that the first fixing seat is of a cylindrical structure and comprises the second fixing seat, the pore passage, the steel ball, the first spring and other parts, and the technical scheme is convenient to assemble, small in size and free of excessive stress of the control device. Specifically, the second fixing seat is mounted at the end of the winding drum and located on the outer side of the first fixing seat during application, when the second fixing seat rotates along with the winding drum and translates along the axis of the lead screw, the steel ball rotates relative to the axis of the lead screw and translates along the axis of the lead screw, and after the steel ball is pushed into the annular groove under the action of the first spring, the steel ball is sheared in the process of further moving of the winding drum, so that the second fixing seat can be prevented from further moving by the pushing force applied to the second fixing seat by the steel ball. This scheme not only usable steel ball provides the resistance for the reel further removes along the lead screw to the effect of second fixing base, the form that sets up to first fixing base simultaneously allows the steel ball to roll out in by the ring channel, can make the effort of second fixing base to the reel not rigid impact, and the steel ball performance is located the in-process that the second spring acted on the reel to the effect of providing the resistance to the reel, the part kinetic energy of reel has been consumed to the second spring this moment of having utilized, so controlling means performance in-process also can provide protecting against shock to each spare part in this scheme especially the screw thread pair between reel and the lead screw.

The pore passage is a through hole penetrating through the second fixed seat;

the end plug, the first spring, the centering shaft and the steel ball are sequentially arranged in the hole channel from the outer side to the inner side of the hole channel, the end plug is fixed in the hole channel, one end of the first spring acts on the end plug, the other end of the first spring acts on the centering shaft, a spherical surface is arranged on the centering shaft, and the surface of the steel ball is attached to the spherical surface. In this scheme, set up the pore into the through-hole, on the assembly order of relevant part, as a concrete implementation, can realize: the connection of the second fixing seat on the end face of the winding drum is firstly completed, then the steel ball, the centering shaft, the first spring and the end plug are sequentially arranged into the hole channel according to the sequence, in order to enable the elastic compression amount of the first spring to be adjustable to correct or adjust the energy consumed by the separation of the steel ball from the annular groove, the mode that the end plug is connected into the through hole through the internal thread arranged in the through hole (the compression amount of the first spring is adjusted through rotating the end plug, and the positive pressure of the contact surface of the steel ball and the annular groove is influenced by the compression amount) is preferably adopted, the mode is set to comprise the centering shaft, and the purpose is realized: the steel ball is rolling friction when receiving the shearing because the contact force between steel ball and ring channel, centering shaft is great simultaneously, like this, can make rolling friction's friction surface all be located ring channel surface, steel ball surface and the spherical surface of centering shaft, compare in if directly imbed the steel ball in the pore, if handle through choosing for use wear-resisting material or the friction surface of just carrying out surface wear-resisting treatment to other, can effectively ensure the cooperation precision between the part to promote life-span and the performance stability of this scheme. The centering of the centering shaft in the duct may be achieved by the first spring and/or the wall of the duct.

The utility model discloses following beneficial effect has:

the reel that this scheme was decided according to the cooperation characteristics of lead screw and reel continues to rotate the in-process and will continue the characteristics of moving along the lead screw axis, has set up an energy-absorbing subassembly, and concrete theory of operation does: install this energy-absorbing component in the place ahead of direction of motion when reel release wire rope, simultaneously, keep off the terminal surface of ring orientation reel, like this, rotate and along the in-process of lead screw axis further motion when the reel with the direction of rotation of releasing wire rope, because this energy-absorbing component sets up the place ahead at reel direction of motion, when the reel with keep off the ring and take place to contact and when extrudeing, transmit thrust through the second bearing and make the second spring compressed, further be extruded along lead screw axis motion in-process second spring at the reel, force the reel stop rotation and translate along self axis until under this energy-absorbing component's effect. Compared with the method that rigid constraints are arranged at the end parts of the winding drum, the energy absorption assembly can effectively prevent the end surface of the winding drum, the upper part of the winding drum and a thread pair between the winding drum and a lead screw from being damaged due to impact; compared with the situation that the winding drum does not have other constrained rotation under inertia, the energy absorption assembly converts the kinetic energy on the winding drum into the elastic potential energy of the second spring, so that the length of the steel wire rope continuously released from the winding drum after the control rod is dropped can be shortened, the possibility of hooking the steel wire rope and the possibility of entering a gear shaft meshing area are reduced by reducing the length of a loose section of the steel wire rope, meanwhile, the corresponding lead screw is generally a ball lead screw, and the winding drum can reversely rotate to wind part or all of the loose section on the steel wire rope under the reverse pushing of the second spring after the movement speed of the winding drum is 0, so that the purpose of improving the reliability of the winding drum assembly and the control rod driving mechanism is achieved. The second bearing enables the winding drum to rotate relative to the second spring, so that abrasion caused by sliding friction of parts on the control rod drive mechanism and the winding drum due to torque is avoided, and the purpose of prolonging the service life of the control rod drive mechanism is achieved.

Drawings

FIG. 1 is a schematic structural view, in cross section, of an embodiment of the present disclosure;

fig. 2 is a partially enlarged view of a portion a shown in fig. 1.

The reference numbers in the drawings are respectively: 1. guide post, 2, first fixing base, 3, second fixing base, 4, circlip for shaft, 5, linear bearing, 6, winding drum, 7, first bearing, 8, first gear, 9, first circlip, 10, tensioning screw, 11, second circlip, 12, second set screw, 13, second gear, 14, stop collar, 15, pressing block, 16, wire rope, 17, lead screw, 18, retaining ring, 19, steel ball, 20, first spring, 21, end plug, 22, centering shaft, 23, second bearing, 24, spacer ring, 25, second spring, 26, second set screw, 27, key, 28, annular groove.

Detailed Description

The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:

example 1:

as shown in fig. 1 and fig. 2, a roll energy absorbing assembly includes a first fixing seat 2, a second spring 25 having one end acting on the first fixing seat 2, and a retainer ring 18 disposed at the other end of the second spring 25, wherein a second bearing 23 is disposed between the retainer ring 18 and the second spring 25, and the second bearing 23 is a thrust bearing for allowing the retainer ring 18 to rotate relative to the second spring 25;

the shapes and the sizes of the second spring 25, the second bearing 23 and the baffle ring 18 meet the following requirements: the three may be arranged coaxially.

In the prior art, the mode of realizing the emergency shutdown of the nuclear reactor comprises a mode of adopting a control rod to drop the rod emergently, taking the technical scheme provided by the application number of CN202111412631.0 as an example, after the electromagnetic clutch is disconnected, the control rod falls under the action of self gravity, because the upper end of the control rod is connected with the steel wire rope 16, the steel wire rope 16 is partially wound on the winding drum 6, the winding drum 6 is dragged by the steel wire rope 16 to rotate during the falling process of the control rod, the rotating speed of the winding drum 6 is related to the falling speed of the control rod, during the rod falling process without jamming of the control rod under the self weight and the specific falling height, it is possible to accelerate the drum 6 to a speed much greater than the speed of rotation of the drive mechanism (typically a drive motor), and, when the control rod is engaged with the buffer mechanism in the pressure vessel, the drum 6 will rotate further under its own inertia, at which point the wire rope 16 released from the drum 6 will change from a taut state to a slack state. Since the drive motor generally drives the drum 6 to rotate through the reducer, the drive mechanism generally has a plurality of gear sets for realizing reduction transmission, meanwhile, in order to further accurately position the fixed-point release of the steel wire rope 16, a guide wheel set for restraining the position of the steel wire rope 16 in the space is generally configured, so that after the control rod is dropped, the winding drum 6 continues to rotate to further release the steel wire rope 16, a slack length of rope 16 will be formed between the release position of the rope 16 on the drum 6 and the guide sheave block, meanwhile, the shape and the position of the section of the steel wire rope 16 are not controllable, when the steel wire rope 16 is hooked with other parts on the control rod driving mechanism or enters the meshing position of the gear set, the steel wire rope 16 cannot be wound on the winding drum 6 at a later stage and even can be damaged or cut by the gears meshed with each other, and the reliability of the performance of the winding drum 6 assembly and the control rod driving mechanism is influenced.

The reel 6 that this scheme was decided according to the cooperation characteristics of lead screw 17 and reel 6 continues the characteristics that the in-process will continue the motion along lead screw 17 axis, has set up an energy-absorbing subassembly, and concrete theory of operation does: install this energy-absorbing subassembly in the place ahead of direction of motion when reel 6 releases wire rope 16, simultaneously, the fender ring 18 is towards the terminal surface of reel 6, like this, when reel 6 rotates with the direction of rotation that releases wire rope 16 and along the in-process of lead screw 17 axis further motion, because this energy-absorbing subassembly sets up in the place ahead of reel 6 direction of motion, when reel 6 and fender ring 18 take place to contact and extrude, transmit thrust through second bearing 23 and make second spring 25 compressed, second spring 25 is further extruded in reel 6 further along lead screw 17 axis motion in-process, force reel 6 stall and along self axis translation under this energy-absorbing subassembly's effect. Thus, compared with the rigid constraint arranged at the end part of the winding drum 6, the energy absorption assembly can effectively prevent the end surface of the winding drum 6, the upper part of the winding drum and the thread pair between the winding drum and the screw 17 from being damaged due to impact; compared with the situation that the winding drum 6 does not have other constrained rotation under inertia, the energy absorption assembly converts the kinetic energy on the winding drum 6 into the elastic potential energy of the second spring 25, so that the length of the steel wire rope 16 continuously released from the winding drum 6 after the control rod is dropped is shortened, the possibility of hooking the steel wire rope 16 and the possibility of entering a gear shaft meshing area are reduced by reducing the length of a loose section of the steel wire rope 16, meanwhile, due to the fact that the corresponding lead screw 17 is generally a ball lead screw 17, the winding drum 6 can reversely rotate to wind a part or all of the loose section on the steel wire rope 16 under the reverse thrust of the second spring 25 after the movement speed of the winding drum 6 is 0, and the purpose of improving the reliability of the winding drum 6 assembly and the control rod driving mechanism is achieved. The second bearing 23 enables the winding drum 6 to rotate relative to the second spring 25, so that abrasion caused by sliding friction of parts on the assembly and the winding drum 6 due to torque is avoided, and the purpose of prolonging the service life of the control rod driving mechanism is achieved.

Example 2:

this example is further defined on the basis of example 1:

among the prior art, the mode that lead screw 17 generally supported with both ends is installed on reel 6 subassembly, and reel 6 is located between lead screw 17's the both ends in the position of lead screw 17 on the axis, can regard as the mount pad with lead screw 17 as this energy-absorbing component as one kind to simplify control rod drive mechanism's structure and make things convenient for this energy-absorbing component to assemble, set up to: and each of the three parts is provided with a central hole, and when the three parts are coaxially arranged, the central holes of the three parts are coaxial. In the scheme, the central holes of the three are all used for the lead screw 17 to pass through, and because each is assembled at different axial positions of the lead screw 17, by controlling the aperture of the central hole and/or the outer diameter of the corresponding shaft section of the lead screw 17 and the like, the assembly can be specifically realized in such a way that the first fixing seat 2 is fixed on the screw 17, the inner diameter of the central hole in the second spring 25 is larger than the outer diameter of the shaft section of the screw 17 on the inner side of the second spring, the thrust washer at one end of the second bearing 23 close to the second spring 25 is fixed relative to one end of the second spring 25 far away from the first fixing seat 2, the inner diameter of the thrust washer at one end of the second bearing 23 close to the baffle ring 18 is larger than the outer diameter of the shaft section of the screw 17 on the inner side of the second bearing, the thrust washer at one end of the second bearing 23 close to the baffle ring 18 is embedded and fixed in the baffle ring 18 to realize the position positioning in the radial direction of the screw 17, and the baffle ring 18 can be rotatably and slidably sleeved on the outer side of the screw 17.

As a technical scheme of simple structure, small, convenient assembly, set up to: the first fixed seat 2 is a cylindrical structure with an opening at one end and an end plate at one end, and the second spring 25 acts on the inner side of the end plate;

be provided with the centre bore on the end plate, the three can assemble with first fixing base 2 and be: the central hole on the end plate is coaxial with the central holes of the end plate, the end plate and the end plate;

the end plate is also provided with an internal threaded hole extending from the outer side of the end plate to the wall of the central hole in the end plate, and the internal threaded hole is further in threaded connection with a second set screw 26. This scheme provides a concrete first fixing base 2 of making things convenient for carries out fixed structural style on lead screw 17, through rotating second holding screw 26, utilizes the effort of 26 terminal surfaces of second holding screw and lead screw 17 surface to accomplish first fixing base 2 and fixes on lead screw 17, 2 tube-shape casings of first fixing base in the second spring 25 outside not only can be used to protect second spring 25, can regard as simultaneously as following the supporting body of ring channel, four above centre bores are used for with this energy-absorbing component coaxial arrangement on lead screw 17.

As a technical solution for restricting the position of the second bearing 23 in the radial direction of the screw 17 by using the position of the retainer ring 18 in the radial direction of the screw 17, the following arrangement is provided: the central hole of the baffle ring 18 is a stepped hole, and a thrust washer at one end of the second bearing 23 close to the baffle ring 18 is fixed in the stepped hole. In specific implementation, the step hole on the baffle ring 18 is preferably provided with two step surfaces, the two step surfaces enable the step hole to be provided with three sections of hole sections, wherein the inner diameters of the hole sections at two ends are larger than the inner diameter of the hole section in the space, the lead screw 17 is provided with a step shaft, therefore, the hole section close to the second bearing 23 is used for positioning the corresponding thrust washer in the axial direction and the radial direction of the baffle ring 18, the step surface of the hole section at the other end is used for being matched with the step surface on the lead screw 17, and the energy absorption assembly is limited at a specific axial position on the axial line of the lead screw 17 by utilizing the first fixing seat 2 which is fixed on the axial line of the lead screw 17.

Example 3:

this example is further defined on the basis of example 1:

as a small, through spacer 24 transmission power, can avoid second spring 25 because the deformation leads to the pressurized position dislocation, finally leads to second spring 25 in the deformation in-process elastic force produce the sudden change and cause reel 6 to receive the technical scheme of assaulting, set up to: the second spring 25 is formed by stacking a plurality of disc springs, and a space ring 24 is arranged between any two adjacent disc springs; the outer diameter of the spacer 24 is larger than or equal to the outer diameter of the disc spring, and the adjacent disc springs transmit force through the spacer 24. In the specific implementation of the scheme, aiming at the assembly mode that the second spring 25 is sleeved on the lead screw 17, the space ring 24 is set to be of an annular structure, and the inner diameter of the central hole in the space ring 24 is larger than the outer diameter of the shaft section of the lead screw 17 on the inner side of the space ring.

Example 4:

this example is further defined on the basis of example 1:

be different from traditional field, the installation space that sets up for each spare part when nuclear reactor structural design is limited, and simultaneously, second spring 25 generally works in the environment that is higher than the room temperature, for the load size that the compression volume of control second spring 25 in order to avoid its single work to bear in order to prolong second spring 25's life, sets up as: the device also comprises a control device for controlling the elastic compression amount of the second spring 25, wherein the elastic compression amount is the elastic compression amount of the second spring 25 in the axial direction;

the control device comprises a second fixing seat 3 and a resistance piece, wherein the resistance piece provides resistance for the second fixing seat 3 to move relative to the first fixing seat 2 along the axis of the first fixing seat 2 through shearing or pressing. As a person skilled in the art, the above control device can achieve the corresponding purpose by bearing part of or all of the thrust from the spool 6 during the elastic deformation of the second spring 25 under the action of the spool 6, and the person skilled in the art can adopt various forms of control devices without creative efforts.

As a specific implementation form, the method comprises the following steps: the first fixed seat 2 is a tubular structure with an opening at one end, and the second spring 25 is partially or completely positioned in an inner hole of the first fixed seat 2;

an annular groove extending along the circumferential direction of the first fixed seat 2 is further formed in the outer side surface of the first fixed seat 2;

the inner wall of the second fixed seat 3 is positioned at the outer side of the outer wall of the first fixed seat 2, the second fixed seat 3 is also provided with a pore canal which is provided with an orifice on the inner wall, the control device also comprises a steel ball 19 which is embedded in the pore canal, and a first spring 20 which is used for applying thrust to the steel ball 19 so as to enable the surface of the steel ball 19 to be in contact with the outer wall is also arranged in the pore canal;

the sizes of the pore passage, the steel ball 19 and the annular groove respectively meet the following requirements: in the process that the second fixed seat 3 moves along the axis of the first fixed seat 2 in the direction of compressing the second spring 25, the steel ball 19 can be extruded into the annular groove under the action of the first spring 20, and at the moment, the steel ball 19 is used as a part bearing shear stress between the first fixed seat 2 and the second fixed seat 3. According to the scheme, the control device is arranged on the basis that the first fixing seat 2 is of a cylindrical structure and comprises the second fixing seat 3, the pore channel, the steel ball 19, the first spring 20 and the like, and the technical scheme is convenient to assemble, small in size and free of excessive stress of the control device. Specifically, the second fixing seat 3 is mounted at the end of the winding drum 6 and located outside the first fixing seat 2 during operation, when the second fixing seat 3 rotates along with the winding drum 6 and translates along the axis of the lead screw 17, the steel ball 19 rotates relative to the axis of the lead screw 17 and translates along the axis of the lead screw 17, and after the steel ball 19 is pushed into the annular groove under the action of the first spring 20, the steel ball 19 is sheared during further movement of the winding drum 6, so that the pushing force applied to the second fixing seat 3 by the steel ball 19 can prevent the second fixing seat 3 from further movement. The effect of usable steel ball 19 to second fixing base 3 not only provides the resistance for reel 6 further removes along lead screw 17 for this scheme, set up to the form of first fixing base 2 when allowing steel ball 19 to roll out from the ring channel simultaneously, can make second fixing base 3 be not the rigid impact to the effort of reel 6, and steel ball 19 play the effect of providing the resistance to reel 6 lies in the in-process that second spring 25 took place the effect to reel 6, utilized second spring 25 to consume the partial kinetic energy of reel 6 this moment, so controlling means plays the in-process that also can provide protecting against shock to each spare part in this scheme especially the screw thread pair between reel 6 and lead screw 17.

The pore passage is a through hole penetrating through the second fixed seat 3;

an end plug 21, a first spring 20, a centering shaft 22 and a steel ball 19 are sequentially arranged in the hole from the outer side to the inner side of the hole, the end plug 21 is fixed in the hole, one end of the first spring 20 acts on the end plug 21, the other end of the first spring acts on the centering shaft 22, a spherical surface is arranged on the centering shaft 22, and the surface of the steel ball 19 is attached to the spherical surface. In this scheme, set up the pore into the through-hole, on the assembly order of relevant part, as a concrete implementation, can realize: the connection of the second fixing seat 3 on the end face of the winding drum 6 is firstly completed, and then the steel ball 19, the centering shaft 22, the first spring 20 and the end plug 21 are sequentially arranged into a hole channel, so that the elastic compression amount of the first spring 20 can be adjusted to correct or adjust the energy consumed by the separation of the steel ball 19 from the annular groove, preferably, the end plug 21 is connected into the through hole through an internal thread arranged in the through hole in a threaded manner (the compression amount of the first spring 20 is adjusted by rotating the end plug 21, and the compression amount influences the positive pressure of the contact surface of the steel ball 19 and the annular groove), and the end plug 22 is arranged to comprise the centering shaft, and aims to realize that: when the steel ball 19 is sheared, because the contact force between the steel ball 19 and the annular groove and the contact force between the steel ball 19 and the centering shaft 22 are large, and meanwhile, the steel ball is in rolling friction, so that the friction surfaces of the rolling friction are all located on the surfaces of the annular groove, the surface of the steel ball 19 and the spherical surface of the centering shaft 22, compared with the situation that the steel ball 19 is directly embedded into a pore channel, for example, the friction surfaces which are conveniently subjected to surface wear-resistant treatment are treated by selecting wear-resistant materials or the like, the matching precision between parts can be effectively guaranteed, and the service life and the performance stability of the scheme are improved. The centering of the centering shaft 22 within the tunnel may be achieved by the first spring 20 and/or the wall of the tunnel.

The foregoing is a more detailed description of the present invention, taken in conjunction with specific preferred embodiments thereof, and it is not intended that the present invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of the ordinary skilled person say, do not deviate from the utility model discloses a other embodiments that reach under the technical scheme all should be contained the utility model discloses a within the scope of protection.

Claims (9)

1. A winding drum energy absorption assembly comprises a first fixing seat (2) and a second spring (25) with one end acting on the first fixing seat (2), and is characterized by further comprising a baffle ring (18) arranged at the other end of the second spring (25), wherein a second bearing (23) is arranged between the baffle ring (18) and the second spring (25), and the second bearing (23) is a thrust bearing which enables the baffle ring (18) to rotate relative to the second spring (25);

the shapes and the sizes of the second spring (25), the second bearing (23) and the baffle ring (18) meet the following requirements: the three may be arranged coaxially.

2. The roll energy absorber assembly of claim 1 wherein each of said three members has a central aperture, and wherein said central apertures of said three members are coaxial.

3. A roll energy absorber assembly according to claim 2, characterized in that the first holder (2) is a tubular structure open at one end and provided with an end plate at one end, the second spring (25) acting on the inside of the end plate;

be provided with the centre bore on the end plate, the three can assemble with first fixing base (2) and be: the central hole on the end plate is coaxial with the central holes of the end plate, the end plate and the end plate;

the end plate is also provided with an internal thread hole which extends from the outer side of the end plate to the hole wall of the central hole in the end plate, and the internal thread hole is also in threaded connection with a second set screw (26).

4. A spool energy absorber assembly according to claim 2 wherein the central aperture in the retainer ring (18) is a stepped aperture in which the thrust washer of the second bearing (23) adjacent one end of the retainer ring (18) is secured.

5. A roll energy absorber assembly according to claim 1, wherein the second spring (25) is formed by stacking a plurality of disc springs, and a spacer ring (24) is provided between any two adjacent disc springs; the outer diameter of the space ring (24) is larger than or equal to that of the disc spring, and the adjacent disc springs transmit force through the space ring (24).

6. A roll energy absorber assembly according to claim 1, further comprising control means for controlling the amount of resilient compression of the second spring (25), the amount of resilient compression being the amount of resilient compression of the second spring (25) in the direction of its axis;

the control device comprises a second fixing seat (3) and a resistance piece, wherein the resistance piece provides resistance for the second fixing seat (3) to move relative to the first fixing seat (2) along the axis of the first fixing seat (2) through shearing or pressing.

7. A roll energy absorber assembly according to claim 6, characterized in that the first holder (2) is a tubular structure with an open end, and the second spring (25) is partially or completely located in the inner hole of the first holder (2);

an annular groove (28) extending along the circumferential direction of the first fixed seat (2) is further formed in the outer side surface of the first fixed seat (2);

the inner wall of the second fixed seat (3) is positioned at the outer side of the outer wall of the first fixed seat (2), a pore canal with an orifice is further arranged on the second fixed seat (3), the control device further comprises a steel ball (19) embedded in the pore canal, and a first spring (20) used for applying thrust to the steel ball (19) is further arranged in the pore canal so that the surface of the steel ball (19) is in contact with the outer wall;

the sizes of the pore canal, the steel ball (19) and the annular groove (28) meet the following requirements: in the process that the second fixing seat (3) moves along the axis of the first fixing seat (2) in the direction of compressing the second spring (25), the steel ball (19) can be extruded into the annular groove (28) under the action of the first spring (20), and at the moment, the steel ball (19) is used as a part bearing shear stress between the first fixing seat (2) and the second fixing seat (3).

8. A roll energy absorber assembly according to claim 7, wherein the passage is a through hole extending through the second anchor (3);

an end plug (21), a first spring (20), a centering shaft (22) and a steel ball (19) are sequentially arranged in the hole channel from the outer side to the inner side of the hole channel, the end plug (21) is fixed in the hole channel, one end of the first spring (20) acts on the end plug (21) and the other end of the first spring acts on the centering shaft (22), a spherical surface is arranged on the centering shaft (22), and the surface of the steel ball (19) is attached to the spherical surface.

9. A roll energy absorber assembly according to claim 8, wherein the end plug (21) is threadedly connected in the through hole by means of an internal thread provided in the through hole.

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