CN214404694U

CN214404694U - Dry gas seal axial positioning device

Info

Publication number: CN214404694U
Application number: CN202120148039.3U
Authority: CN
Inventors: 魏江林; 罗国平; 陈磊; 崔智银; 张建荣
Original assignee: Nanjing Jinling Petrochemical Construction And Installation Engineering Co ltd
Current assignee: Nanjing Jinling Petrochemical Construction And Installation Engineering Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-10-15
Anticipated expiration: 2031-01-19

Abstract

The utility model belongs to the technical field of the sealed technique of dry gas and specifically relates to a dry gas seal axial positioner is related to, and it includes connecting screw, connecting screw's tip is provided with the screw thread that connects soon that is used for threaded connection rotor centre bore, still establishes including the cover fixed pressing plate on the connecting screw, connecting screw's pole wall is located there is the spiral shell piece fixed pressing plate's both sides threaded connection respectively, and is a pair of spiral shell piece butt respectively fixed pressing plate, a plurality of lock-up holes that supply the screw cross-under are seted up to fixed pressing plate's face. This application has the sealed axial positioning stability of reinforcing dry gas, improves the sealed effect of using reliability of dry gas.

Description

Dry gas seal axial positioning device

Technical Field

The application relates to the technical field of dry gas sealing, in particular to an axial positioning device for dry gas sealing.

Background

Dry gas sealing was originally developed to address the problem of shaft end sealing in high speed centrifugal compressors. The dry gas seal belongs to non-contact seal, which is a novel shaft end seal for applying the slotting sealing technology to gas seal. The non-contact operation of the sealing end face is realized by adding a dynamic pressure groove on a mechanical sealing moving ring and correspondingly arranging an auxiliary system, and a common centrifugal compressor is mainly used in a hydrocracking device.

The centrifugal compressor in the hydrocracking device does not change dry gas seal frequently in the maintenance process, only checks and repairs the bearing bush of the bearing box, however, the rotor can move axially in the process of repairing and disassembling the bearing bush, the axial allowable displacement of the dry gas seal is 2 mm, and the reliability of the dry gas seal is seriously influenced after the rotor generates too large axial displacement.

SUMMERY OF THE UTILITY MODEL

In order to strengthen the axial positioning stability of the dry gas seal and improve the reliability of the dry gas seal, the application provides a dry gas seal axial positioning device.

The application provides a dry gas seal axial positioner adopts following technical scheme:

the utility model provides a dry gas seal axial positioner, includes connecting screw, connecting screw's tip is provided with the screw thread that connects soon that is used for the centre bore of threaded connection rotor, still establishes including the cover fixed pressing plate on the connecting screw, connecting screw's pole wall is located there is the spiral shell piece fixed pressing plate's both sides threaded connection respectively, and is a pair of the spiral shell piece butt respectively fixed pressing plate, the lock-joint hole of a plurality of confession screw cross-under is seted up to fixed pressing plate's face.

Through adopting above-mentioned technical scheme, operating personnel will connect the screw rod through revolving on the centre bore of screw-thread fastening on the rotor earlier, with one of them spiral shell piece threaded connection on connecting screw rod and revolve to rotor one side, then embolia connecting screw rod and impel to the bearing box outside with fixed pressing plate, with another spiral shell piece threaded connection on connecting screw rod, rotatory a pair of spiral shell piece is tight fixed pressing plate relatively clamp, thereby at fixed pressing plate both sides relative positioning fixed pressing plate, the rotor is by rigid connection on fixed pressing plate this moment, be favorable to strengthening the stability of dry gas seal axial positioning, improve the reliability that the dry gas seal used, be favorable to providing the location for the installation of dry gas seal when using in the dry gas seal installation simultaneously.

Optionally, the periphery wall of spiral shell piece is provided with a plurality of friction strips, it is located to be located on the face of holding plate one side of spiral shell piece is provided with locating component, locating component is including installing support on the holding plate, the support orientation the cross-under of spiral shell piece has the push rod of supporting, support the push rod orientation the tip of spiral shell piece is provided with a pair of clamping jaw that is used for the centre gripping relatively the spiral shell piece periphery wall.

Through adopting above-mentioned technical scheme, operating personnel installs the support on fixed pressing plate in advance, embolias connecting screw with fixed pressing plate and behind the rotatory a pair of spiral shell piece relative positioning fixed pressing plate, promotes to support the push rod and makes the periphery wall of a pair of clamping jaw centre gripping spiral shell piece, and friction stripe increases the frictional force of the relative centre gripping spiral shell piece of clamping jaw, improves the stability of a pair of clamping jaw centre gripping spiral shell piece, is favorable to reducing the spiral shell piece and takes place not hard up, improves the stability of a pair of spiral shell piece relative positioning fixed pressing plate.

Optionally, a limiting block is fixed at one end of the pushing rod, which is far away from the screw block, a pushing spring is sleeved between the support and the limiting block, one end of the pushing spring is fixedly connected with the support, and the other end of the pushing spring is fixedly connected with the limiting block;

the pair of clamping jaws oppositely clamps the screw block under the action of no external force of the abutting and pushing spring.

Through adopting above-mentioned technical scheme, support and push away the spring and do not have the exogenic action down natural shrinkage and promote towards the spiral shell piece and support the push rod to be favorable to keeping the stability of the stable centre gripping spiral shell piece of a pair of clamping jaw, can break away from the spiral shell piece fast with a pair of clamping jaw through pulling stopper operating personnel, make things convenient for operating personnel to dismantle the spiral shell piece fast.

Optionally, a hinge lug for rotatably connecting the clamping jaw is fixed on the end wall of the pushing rod facing the screw block, a rotating shaft for rotatably connecting the hinge lug is fixed on the clamping jaw, a torsion spring is sleeved on the rotating shaft, one end of the torsion spring is fixedly connected with the hinge lug, and the other end of the torsion spring is fixedly connected with the clamping jaw;

the torsion spring is attached to the clamping jaws oppositely under the action of no external force.

Through adopting above-mentioned technical scheme, a pair of clamping jaw relies on the epaxial torsional spring of pivot separately to keep pressing from both sides tight trend relatively, and when a pair of clamping jaw centre gripping corresponds the spiral shell piece, the torsional spring twists reverse a pair of clamping jaw and further presss from both sides tight spiral shell piece, is favorable to further strengthening the stability of the relative centre gripping spiral shell piece of a pair of clamping jaw.

Optionally, a plurality of clamping grooves for engaging the friction strips are provided on the opposite clamping surfaces of the clamping jaws.

Through adopting above-mentioned technical scheme, when a pair of clamping jaw is relative centre gripping spiral shell piece, a plurality of centre gripping grooves mesh with a plurality of friction strips mutually, are favorable to strengthening the stability of the relative centre gripping spiral shell piece of clamping jaw.

Optionally, a pull ring is fixed on each of the opposite back faces of the pair of clamping jaws.

Through adopting above-mentioned technical scheme, the pull ring makes things convenient for operating personnel pulling clamping jaw to break away from the spiral shell piece periphery wall, makes things convenient for operating personnel to relieve clamping jaw centre gripping spiral shell piece fast.

Optionally, a support rod is hinged to the support, and a positioning groove for the support rod to rotate into and be clamped is formed in the surface of the limiting block facing the support;

after the supporting rod is rotated into the positioning groove, the clamping jaw is separated from the screw block.

Through adopting above-mentioned technical scheme, before operating personnel used clamping jaw centre gripping spiral shell piece, the constant head tank was gone into to the rotation bracing piece card to keep the clamping jaw to break away from relative spiral shell piece, make things convenient for operating personnel freely to adjust connecting screw and spiral shell piece.

Optionally, one end of the screw block, which is away from the fixed pressing plate, is fixed with a pair of torsion lugs along the circumferential direction of the screw block.

Through adopting above-mentioned technical scheme, a pair of ear of turning round makes things convenient for the manual quick turnning of operating personnel to transfer the spiral shell piece, improves the convenience that the dismouting was transferred soon to the spiral shell piece.

In summary, the present application includes at least one of the following beneficial technical effects:

1. an operator fastens the connecting screw rod to the central hole of the rotor, sleeves the connecting screw rod with the fixed pressing plate and pushes the connecting screw rod to the outer side of the bearing box, and rotates the pair of screw blocks to clamp the fixed pressing plate oppositely, so that the rotor is rigidly connected to the fixed pressing plate, the stability of the dry gas seal in axial positioning is enhanced, the reliability of the dry gas seal in use is improved, and meanwhile, the positioning is provided for the dry gas seal in use in the dry gas seal installation process;

2. an operator pushes the push rod to enable the pair of clamping jaws to clamp the outer peripheral wall of the screw block, the friction stripes increase the friction force of the clamping jaws relative to the clamping screw block, the stability of the pair of clamping jaws for clamping the screw block is improved, the loosening of the screw block is reduced, and the stability of the pair of screw blocks relative to the positioning and fixing pressure plate is improved;

3. when the pair of clamping jaws clamp the corresponding screw block, the torsion spring twists the pair of clamping jaws to further clamp the screw block, so that the stability of the pair of clamping jaws relative to the clamping screw block is further enhanced.

Drawings

Fig. 1 is a schematic partial structure diagram for embodying a connecting screw rod, a fixed pressure plate, a screw block, a rotor and a bearing box in embodiment 1 of the present application.

Fig. 2 is a partial structural schematic diagram for embodying mounting screw holes, friction strips, torsion lugs and positioning components in embodiment 2 of the present application.

Fig. 3 is a partial sectional view for embodying a hinge lug, a torsion spring, a positioning groove, a catching groove, and a tab in embodiment 2 of the present application.

Reference sign specification, 1, connecting screw; 11. screwing threads; 2. fixing the pressing plate; 21. a lock-in hole; 22. mounting a screw hole; 3. a screw block; 31. rubbing the stripes; 32. twisting the lug; 4. a positioning assembly; 41. a support; 411. a foot seat; 42. pushing the push rod; 43. a clamping jaw; 431. a rotating shaft; 432. a clamping groove; 433. a pull ring; 44. a limiting block; 441. positioning a groove; 45. pushing the spring; 46. mounting a plate; 47. hinging a lug; 48. a torsion spring; 49. a support bar; 5. a rotor; 6. a bearing housing.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses dry gas seal axial positioning device.

Example 1

Referring to fig. 1, dry gas seal axial positioner, establish fixing plate 2 on connecting screw 1 including connecting screw 1 and cover, connecting screw 1's pole wall is provided with connects the screw thread 11 soon, and the screw thread pitch of the screw thread 11 of connecting screw 1 bottom matches with the screw thread pitch that corresponds the centre bore of rotor 5 soon, connecting screw 1's pole wall is located fixing plate 2's upper and lower both sides threaded connection respectively has spiral shell piece 3, fixing plate 2's face is close to self periphery wall circumference and has seted up a plurality of lock holes 21, and a plurality of lock holes 21 are relative with 6 terminal surfaces of bearing box and can connect the screw soon in order to fix fixing plate 2 on bearing box 6, the relative butt fixing plate 2 upper and lower faces of a pair of spiral shell piece 3 of this moment.

The implementation principle of the embodiment 1 is as follows: an operator firstly fastens the connecting screw rod 1 on a central hole of the rotor 5 through a screwing thread 11, one of the screw blocks 3 is in threaded connection on the connecting screw rod 1 in advance and screwed to the rotor 5, then the fixed pressing plate 2 is sleeved into the connecting screw rod 1 and pushed to the outer side of the bearing box 6, the other screw block 3 is in threaded connection on the connecting screw rod 1, the pair of rotating screw blocks 3 relatively clamps the fixed pressing plate 2, so that the fixed pressing plates 2 are relatively positioned on two sides of the fixed pressing plate 2, at the moment, the rotor 5 is rigidly connected on the fixed pressing plate 2, the axial positioning stability of dry gas sealing is favorably enhanced, and the reliability of the use of the dry gas sealing is improved. In the dry gas seal installation process, the connecting screw rod 1 penetrates through the fixed pressing plate 2, then the fixed pressing plate 2 is attached to the bearing box 6, and the screws are screwed through the locking holes 21 in sequence so that the fixed pressing plate 2 is fixed on the bearing box 6, and the dry gas seal installation is favorably positioned.

Example 2

Referring to fig. 2 and 3, the present embodiment is different from embodiment 1 in that a plurality of friction stripes 31 are circumferentially disposed on an outer circumferential wall of a screw block 3, an extending direction of a single friction stripe 31 is parallel to an axial direction of the screw block 3, a positioning assembly 4 is mounted on a plate surface of a fixed platen 2 at one side of the screw block 3, the positioning assembly 4 includes a support 41 mounted on the fixed platen 2, feet 411 are fixed on opposite sides of a bottom surface of the support 41, a plurality of pairs of mounting screw holes 22 for abutting the pair of feet 411 are circumferentially disposed on the plate surface of the fixed platen 2, the support 41 is screwed to the mounting screw holes 22 through the feet 411 to be locked on the fixed platen 2, a pushing rod 42 is penetrated through the support 41 toward the screw block 3, a mounting plate 46 is fixed on the pushing rod 42 toward the corresponding screw block 3, and a pair of clamping jaws 43 for clamping the outer circumferential wall of the screw block 3 is oppositely disposed on the mounting plate 46, a limiting block 44 is fixed at one end of the pushing rod 42 far away from the opposite screw block 3, a pushing spring 45 is sleeved on the rod wall of the pushing rod 42 between the support 41 and the limiting block 44, one end of the pushing spring 45 is fixedly connected with the support 41, the other end of the pushing spring is fixedly connected with the limiting block 44, and the pair of clamping jaws 43 oppositely clamps the outer peripheral wall of the screw block 3 under the action of no external force of the pushing spring 45; an operator installs the support 41 on the fixing clamp plate 2 in advance through the foot seat 411 and the screw, the fixing clamp plate 2 is sleeved in the connecting screw rod 1 and rotates the pair of screw blocks 3 to position the fixing clamp plate 2 relatively, the pushing and pushing rod 42 is pushed to enable the pair of clamping jaws 43 to clamp the peripheral wall of the screw blocks 3, the friction stripes 31 increase the friction force of the clamping jaws 43 to clamp the screw blocks 3 relatively, the stability of the pair of clamping jaws 43 to clamp the screw blocks 3 is improved, the looseness of the screw blocks 3 is favorably reduced, the stability of the pair of screw blocks 3 to position the fixing clamp plate 2 relatively is improved, the pushing and pushing spring 45 naturally contracts without external force and pushes the pushing and pushing rod 42 towards the screw blocks 3, the stability of the pair of clamping jaws 43 to clamp the screw blocks 3 is favorably maintained, the operator can rapidly separate the pair of clamping jaws 43 from the screw blocks 3 by pulling the limiting block 44, and the operator can rapidly disassemble the screw blocks 3.

Referring to fig. 2 and 3, the top surface of the support 41 is hinged with a support rod 49, the surface of the limit block 44 facing the support 41 is provided with a positioning groove 441 downwards from the top surface of the limit block 44, the support rod 49 rotates into and is clamped by the positioning groove 441, after the support rod 49 rotates into the positioning groove 441, the clamping jaw 43 is separated from the screw block 3, and before the operating personnel uses the clamping jaw 43 to clamp the screw block 3, the support rod 49 rotates and is clamped into the positioning groove 441, so that the clamping jaw 43 is separated from the relative screw block 3, and the operating personnel can freely adjust the connecting screw rod 1 and the screw block 3.

Referring to fig. 2 and 3, two pairs of hinge lugs 47 are relatively fixed on the mounting plate 46 facing the plate surface of the corresponding screw block 3, the two pairs of hinge lugs 47 are respectively close to the left and right opposite sides of the mounting plate 46 and are in one-to-one correspondence, the pair of hinge lugs 47 are longitudinally and oppositely arranged, the pair of clamping jaws 43 extend arc-shaped opening sections towards the opposite ends of the corresponding screw block 3 so as to open the pair of clamping jaws 43, a rotating shaft 431 rotatably connected with the hinge lugs 47 between the pair of hinge lugs 47 is longitudinally fixed at one end of each clamping jaw 43 facing the corresponding hinge lug 47, torsion springs 48 are respectively sleeved at two ends of the rotating shaft 431, one ends of the torsion springs 48 are fixedly connected with the corresponding hinge lugs 47, the other ends of the torsion springs 48 are fixedly connected with the clamping jaws 43, and the pair of clamping jaws 43 are relatively attached to each other under the no external force action; the pair of clamping jaws 43 relatively keep the clamping trend by virtue of the torsion spring 48 on the respective rotating shaft 431, and when the pair of clamping jaws 43 clamp the corresponding screw block 3, the torsion spring 48 twists the pair of clamping jaws 43 to further clamp the screw block 3, which is beneficial to further enhancing the stability of the pair of clamping jaws 43 relative to the clamping screw block 3.

Referring to fig. 2 and 3, a plurality of clamping grooves 432 for engaging the friction strips 31 are formed on the opposite clamping surfaces of the clamping jaws 43, and pull rings 433 are fixed on the opposite back surfaces of the pair of clamping jaws 43; when a pair of clamping jaw 43 is relative centre gripping spiral shell piece 3, a plurality of centre gripping groove 432 and a plurality of friction stripe 31 mesh mutually, are favorable to strengthening the relative centre gripping spiral shell piece 3's of clamping jaw 43 stability, and pull ring 433 makes things convenient for operating personnel to stimulate clamping jaw 43 and breaks away from the 3 periphery walls of spiral shell piece, makes things convenient for operating personnel to remove clamping jaw 43 centre gripping spiral shell piece 3 fast.

Referring to fig. 2 and 3, a pair of twisting lugs 32 are fixed on the end of the screw block 3 departing from the fixed pressure plate 2 along the circumferential direction of the screw block, and the pair of twisting lugs 32 are circumferentially spaced by 180 degrees; the pair of twisting lugs 32 is convenient for operators to manually and quickly rotationally adjust the screw block 3, and the convenience of rotationally adjusting and dismounting the screw block 3 is improved.

The implementation principle of the embodiment 2 is as follows: an operator connects a screw 1 with a central hole of a rotor 5 in a threaded locking manner in advance, then connects a corresponding screw block 3 with the connecting screw 1 in a rotating manner by twisting a pair of twisting lugs 32 of one screw block 3, then connects two supports 41 with the fixed pressing plate 2 through corresponding foot seats 411 and screws in a locking manner, rotates a supporting rod 49 into a positioning groove 441 to keep a clamping jaw 43 separated from the corresponding screw block 3, sleeves the fixed pressing plate 2 on the connecting screw 1 and abuts against a bearing box 6, connects the other screw block 3 with the connecting screw 1 in a rotating manner, clamps the fixed pressing plate 2 by relatively rotating the two screw blocks 3, rotates the two supporting rods 49 to enable the corresponding clamping jaw 43 to move towards the corresponding screw block 3, and pulls open a pair of clamping jaws 43 and clamps the screw block 3 through a pull ring 433 to enable a friction stripe 31 of the corresponding screw block 3 to be abutted against a clamping groove 432, so as to complete the circumferential rotation limitation of the screw block 3.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a dry gas seal axial positioner which characterized in that: including connecting screw (1), the tip of connecting screw (1) is provided with the screw thread (11) that connects soon that is used for the centre bore of threaded connection rotor (5), still establishes including the cover fixed pressing plate (2) on connecting screw (1), the pole wall of connecting screw (1) is located there are spiral shell piece (3) in the both sides of fixed pressing plate (2) threaded connection respectively, and it is a pair of spiral shell piece (3) butt respectively fixed pressing plate (2), a plurality of lock-up hole (21) that supply the screw cross-under are seted up to the face of fixed pressing plate (2).

2. The dry gas seal axial positioning apparatus of claim 1, wherein: the periphery wall of spiral shell piece (3) is provided with a plurality of friction strips (31), be located on the face of holding plate (2) one side of spiral shell piece (3) is provided with locating component (4), locating component (4) are including installing support (41) on holding plate (2), support (41) orientation spiral shell piece (3) cross-under has to support push rod (42), support push rod (42) orientation the tip of spiral shell piece (3) is provided with a pair of clamping jaw (43) that are used for the centre gripping relatively spiral shell piece (3) periphery wall.

3. The dry gas seal axial positioning apparatus of claim 2, wherein: a limiting block (44) is fixed at one end, far away from the screw block (3), of the push resisting rod (42), a push resisting spring (45) is sleeved between the support (41) and the limiting block (44) of the push resisting rod (42), one end of the push resisting spring (45) is fixedly connected with the support (41), and the other end of the push resisting spring is fixedly connected with the limiting block (44);

the pair of clamping jaws (43) oppositely clamps the screw block (3) under the action of no external force of the abutting and pushing spring (45).

4. The dry gas seal axial positioning device of claim 2 or 3, wherein: a hinge lug (47) for the clamping jaw (43) to be rotatably connected is fixed on the end wall of the push rod (42) facing the screw block (3), a rotating shaft (431) for rotatably connecting the hinge lug (47) is fixed on the clamping jaw (43), a torsion spring (48) is sleeved on the rotating shaft (431), one end of the torsion spring (48) is fixedly connected with the hinge lug (47), and the other end of the torsion spring is fixedly connected with the clamping jaw (43);

and the torsion spring (48) is attached to the clamping jaws (43) relatively under the action of no external force.

5. The dry gas seal axial positioning apparatus of claim 4, wherein: and a plurality of clamping grooves (432) used for engaging the friction strips (31) are arranged on the opposite clamping surfaces of the clamping jaws (43).

6. The dry gas seal axial positioning apparatus of claim 4, wherein: and pull rings (433) are fixed on the back surfaces of the clamping jaws (43).

7. The dry gas seal axial positioning apparatus of claim 3, wherein: a support rod (49) is hinged to the support (41), and a positioning groove (441) for the support rod (49) to rotate into and be clamped is formed in the surface, facing the support (41), of the limiting block (44);

after the supporting rod (49) is rotated into the positioning groove (441), the clamping jaw (43) is separated from the screw block (3).

8. The dry gas seal axial positioning apparatus of claim 4, wherein: one end of the screw block (3) departing from the fixed pressing plate (2) is fixed with a pair of torsion lugs (32) along the circumferential direction of the screw block.