CN209188954U - Crusher and its sealing device - Google Patents

Abstract

The utility model discloses a kind of crusher and its sealing devices.Crusher includes sealing device, the shell with hollow structure and the shaft through shell, and hollow structure forms cracking cabin, and sealing device is installed on the through part of shaft and shell.Sealing device includes screw element and stuffing-box, screw element is sheathed in shaft and is located at through part, stuffing-box is located at outside cracking cabin, the first end of stuffing-box is sheathed on screw element in clearance fit and is sealingly engaged with shell, the second end of stuffing-box is in hermetically to be placed in shaft, stuffing-box, shaft, screw element and shell cross clearance space, and the opening communicated with clearance space is offered on stuffing-box.When sealing device work, the rotation of screw element makes screw member head and tail portion generate pressure difference；When being passed through compressed gas toward opening, further increase the pressure difference.Therefore the crusher of the utility model and its sealing device force powdered material to return in cracking cabin under the dual sealing functions of screw element and stuffing-box.

Description

Crusher and its sealing device

Technical field

The utility model relates to field of cracking machine more particularly to a kind of crushers and its sealing device.

Background technique

With the development of science and technology with humane progress, crusher because its can make material break into it is powdered due to widely answered With so that can't do without crusher in people's lives production.With the prosperity of industrial technology, performance requirement of the user to crusher It is gradually increased, traditional crusher can not meet user.

During crusher broken material, it is driven by a motor shaft rotation, the blade in shaft is with shaft To which the material being located in cracking cabin is broken into powder, powdered material is obtained by blanking after strainer filtering again for rotation.And show Some crushers because the effect that it does not have sealing device or sealing device is undesirable, and during material is broken because The powder raised can more or less be gone to outside cracking cabin, make the part (such as bearing) outside cracking cabin due to the pollution by powder It slows up, reduces the operational reliability of the part destroyed outside cracking cabin, lose the service life of the part outside cracking cabin.

Therefore, it is badly in need of wanting a kind of crusher and its sealing device that sealing effect is good to overcome drawbacks described above.

Utility model content

The one of the utility model is designed to provide a kind of sealing device that sealing effect is good.

The another object of the utility model is to provide a kind of crusher that sealing effect is good.

To achieve the above object, the sealing device of the utility model is suitable for being sealed the cracking cabin of crusher, institute Stating crusher includes the shell with hollow structure and the shaft through the shell, and the hollow structure forms described broken Storehouse.The sealing device includes screw element and stuffing-box, and the screw element is sheathed in the shaft and is located at the shell Through part, also with the through part clearance fit of the shell, the stuffing-box is located at outside the cracking cabin screw element, described The first end of stuffing-box is sheathed on the screw element in clearance fit and is sealingly engaged with the shell, the stuffing-box In being hermetically placed in the shaft, the stuffing-box, shaft, screw element and shell cross jointly to be broken second end with described The clearance space of broken storehouse connection offers on the stuffing-box for being passed through compressed air and being connected with the clearance space Opening.

Preferably, the sealing device of the utility model further includes outside framework oil seal, diameter of the outside framework oil seal in the shaft It is placed between the shaft and the stuffing-box upwards, the outside framework oil seal is close to the stuffing-box in the axial direction of the shaft Second end, the second end of the stuffing-box passes through the outside framework oil seal and the rotating shaft sealing, the stuffing-box, shaft, spiral shell Line part, shell and outside framework oil seal cross the clearance space jointly.

Preferably, the sealing device of the utility model further includes retaining ring, the retaining ring is placed on the shaft and the skeleton Between oil sealing, the retaining ring is close to the outside framework oil seal in the axial direction of the shaft, and the second end of the stuffing-box passes through institute State the cooperation of both outside framework oil seal and retaining ring and with the rotating shaft sealing, the stuffing-box, shaft, screw element, shell, skeleton oil Envelope and retaining ring cross the clearance space jointly.

Preferably, the sealing device of the utility model further includes the gland being placed on in the shaft, the gland also with The second end of the stuffing-box is fixedly connected, and the gland clamps the bone along the axial direction of the shaft with the stuffing-box jointly Frame oil sealing and retaining ring.

Preferably, the screw element is with externally threaded helix tube, the screw element is covered in interference or transition fit In in the shaft.

Preferably, the axial line of the relatively described shaft of the hand of spiral of the screw element tilts.

The crusher of the utility model includes the shell with hollow structure and the shaft through the shell, described hollow Structure forms cracking cabin, and the crusher of the utility model further includes above-mentioned sealing device；The sealing device is installed on described The through part of both shaft and the shell.

Preferably, the shaft axially penetrates through the left side and right side of the shell along it, both the shaft and shell Left side through part is equipped with the sealing device, and the right side through part of both the shaft and shell is equipped with the sealing and fills It sets, the hand of spiral of the screw element of one is identical as the direction of rotation of the shaft in the sealing device of the left and right sides, left The hand of spiral of the screw element of another one is opposite with the direction of rotation of the shaft in the sealing device of right two sides.

Preferably, the crusher of the utility model further includes driving assembly and disruption elements, the driving component with it is described Shaft connection, the disruption elements are placed in the shaft, and the disruption elements are located in the cracking cabin.

Preferably, the disruption elements include disk body, limit shaft, destroy knife and bolt, the disk body at least two and In being fixedly sheathed in the shaft, all disk bodies are opened along the axially-spaced of the shaft, and the limit shaft is along institute The axial direction for stating shaft is placed through on all disk bodies, and on the limit shaft, the bolt turns the destruction broach shell along described The radial direction of axis inserts on the limit shaft.

Compared with prior art, the crusher of the utility model is installed on the shaft and the shell by sealing device Through part, therefore the dust in cracking cabin will not be run out of outside cracking cabin；Furthermore sealing device passes through the phase of screw element and stuffing-box Mutually cooperation, when the spindle is rotated, screw element is rotated together with shaft, causes screw member head under the action of screw element rotation And tail portion generates pressure difference, so that dust is forced to return to cracking cabin when moving towards movement along the screw thread of screw element, therefore by spiral shell Line part is as first of seal approach；Again by the opening communicated with clearance space is offered on stuffing-box, when logical toward the opening When entering compressed gas, so that the air pressure of screw element tail portion is greater than the air pressure on head, therefore further dust is forced to return Cracking cabin；Therefore the crusher of the utility model and its sealing device force under the dual sealing functions of screw element and stuffing-box Powdered material returns in cracking cabin.

Detailed description of the invention

Fig. 1 is the schematic perspective view of the crusher of the utility model.

Fig. 2 is the planar structure schematic diagram of the crusher in main view direction of the utility model.

Fig. 3 is the schematic cross-sectional view that A-A cutting line is splitted along Fig. 2.

Fig. 4 is enlarged drawing at B in Fig. 3.

Fig. 5 is enlarged drawing at C in Fig. 3.

Fig. 6 is that the disruption elements in the crusher of the utility model are placed on the schematic perspective view in shaft.

Fig. 7 is the sealing principle schematic diagram of the right side sealing device of the crusher of the utility model.

Fig. 8 is the sealing principle schematic diagram of the left side sealing device of the crusher of the utility model.

Specific embodiment

In order to which the technology contents, construction feature of the utility model is described in detail, below in conjunction with embodiment and cooperate attached drawing It is described further.

It please refers to Fig.1 to Fig.3, the crusher 100 of the utility model includes driving assembly 1, disruption elements 2, sealing device 3, bearing 8, the shell 4 with hollow structure and the shaft 5 through shell 4, hollow structure form cracking cabin 41, driving assembly 1 It is connect with shaft 5, disruption elements 2 are placed in shaft 5, and disruption elements 2 are located in cracking cabin 41；Bearing 8 is placed in shaft 5 and position In outside cracking cabin 41.Sealing device 3 is two and is respectively arranged in the through part P of shaft 5 Yu shell 4, certainly, according to practical feelings The needs of condition, sealing device 3, which is one or three, to be differed, therefore is not limited.Specifically, shaft 5 axially penetrates through shell 4 along it Left side and right side, the left side through part of both shaft 5 and shell 4 is equipped with sealing device 3, the right side of both shaft 5 and shell 4 Side through part is equipped with sealing device 3.When the crusher 100 of the utility model works, the rotation of 1 drive shaft 5 of driving assembly, Shaft drives 2 rotary work of disruption elements to smash the material in cracking cabin 41,3 sealing pivot 5 of sealing device and shell 4 Through part P prevents the dust in cracking cabin 41 from running out of outside cracking cabin 41 and polluting the part destroyed outside cracking cabin 41, such as bearing 8. More specifically, as follows:

Fig. 3 to Fig. 5 is please referred to, sealing device 3 includes screw element 31, stuffing-box 32, outside framework oil seal 35, retaining ring 36 and gland 37.Screw element 31 is sheathed on the through part P in shaft 5 and being located at shell 4.Screw element 31 is also matched with the gap through part P of shell 4 Close, stuffing-box 32 is located at outside cracking cabin 41, the first end of stuffing-box 32 be sheathed in clearance fit on screw element 31 and with it is outer Shell 4 is sealingly engaged, and the second end of stuffing-box 32 is in hermetically to be placed in shaft 5.Specifically, in this present embodiment, outside framework oil seal 35 being radially placed between shaft 5 and stuffing-box 32 in shaft 5, outside framework oil seal 35 is close to stuffing-box in the axial direction of shaft 5 32 second end.Retaining ring 36 is placed between shaft 5 and outside framework oil seal 35, and retaining ring 36 is close to outside framework oil seal in the axial direction of shaft 5 35, the second end of stuffing-box 32 is sealed by the cooperation of both outside framework oil seal 35 and retaining ring 36 with shaft 5.Gland 37 and filler The second end of letter 32 is fixedly connected, and gland 37 is with stuffing-box 32 along the axial common clamping outside framework oil seal 35 and retaining ring 36 of shaft 5. Stuffing-box 32, shaft 5, screw element 31, shell 4, outside framework oil seal 35 and retaining ring 36 cross clearance space 33 jointly, on stuffing-box 32 Offer the opening 34 for being passed through compressed air and being connected with clearance space 33.When the sealing device 3 of the utility model rises When effect, shaft 5 rotation drive screw element 31 rotate, when have dust from through part P fly out cracking cabin 41 it is outer when, due to through part The pressure of P is bigger than the pressure in cracking cabin 41, thus dust with the flank of screw element 31 back-out direction move when be forced to It returns in cracking cabin 41；Again by the first opening 34 on stuffing-box 32, the first open communication gap 33, when past first opening 34 When being passed through compressed air, the air pressure of 31 tail portion of screw element is greater than the air pressure on head, then the dust to fly out can be forced to come back to In cracking cabin 41, therefore the crusher 100 of the utility model under the dual sealing functions of screw element 31 and stuffing-box 32 by making Dust returns to cracking cabin 41；It is preferably in this present embodiment, by the further sealing of outside framework oil seal 35, to realize this The triple seal of the sealing device 3 of utility model, so that sealing effect is more preferable；By retaining ring 36 and gland 37, prevent skeleton oily Envelope 35 is detached from stuffing-box 32, is conducive to the stability and reliability of the sealing device 3 of the utility model.Certainly, according to practical feelings The needs of condition can delete at least one of outside framework oil seal 35, retaining ring 36 and gland 37；When removal outside framework oil seal 35, retaining ring 36 And when gland 37, stuffing-box 32, shaft 5, screw element 31 and shell 4 four cross the clearance space being connected to cracking cabin 41 jointly 33, to realize dual sealing effect；Alternatively, the second end of stuffing-box 32 passes through bone when removing retaining ring 36 and gland 37 Frame oil sealing 35 and shaft 2 seal, and stuffing-box 32, shaft 5, screw element 31, shell 4 and outside framework oil seal 35 cross clearance space jointly 33, to realize triple sealing effects, therefore it is not limited.

Fig. 4 and Fig. 5 is please referred to, screw element 31 is the helix tube with external screw thread 311, and screw element 31 is in interference fit ground set In shaft 5, so that screw element 31 is moved synchronously with shaft 5, fast response time, so that sealing device 3 works more Fastly；Certainly, according to the needs of actual conditions, screw element 31 and 5 transition fit of shaft, therefore be not limited.It is preferably outer spiral shell The hand of spiral of line 311 is tilted with respect to the axial line of shaft 5, so that dust is under the action of draught head along external screw thread 311 directions are finally forced to return to cracking cabin 41, therefore are not limited.

Please refer to Fig. 3, Fig. 7 and Fig. 8, in the sealing device 3 of the left and right sides hand of spiral of the screw element 31 of one with turn The direction of rotation of axis 5 is identical, the rotation of the hand of spiral Yu shaft 5 of the screw element 31 of another one in the sealing device 3 of the left and right sides Turn contrary.Herein the relationship of the direction of rotation of the hand of spiral and shaft 5 of both screw elements 31 of the left and right sides be due to The direction of rotation of shaft 5 and screw element 31 are codetermined in the position of shell 4；For example, when shaft 5 is revolved along arrow N direction When turning, the hand of spiral of the screw element 31 on right side is identical as the direction of rotation of shaft 5 at this time, and the screw thread of the screw element 31 in left side Direction is opposite with the direction of rotation of shaft 5；It can analogically, when opposite direction rotation of the shaft 5 along arrow N meaning, at this point, right The hand of spiral of the screw element 31 of side and the direction of rotation of shaft 5 are on the contrary, and the hand of spiral of the screw element 31 in left side and shaft 5 Direction of rotation it is identical, therefore it is without being limited thereto.

Fig. 1 and Fig. 3 is please referred to, 4 top of shell offers the feeding inlet 42 for being in communication with the outside for cracking cabin 41, shell 4 lower part offers the feed opening 43 for being in communication with the outside for cracking cabin 41, thus material can from the feeding inlet 42 on top into Enter, come out from the feed opening 43 of lower part, meet the direction of gravity, to be more convenient time saving.It is preferably to go back frame in cracking cabin 41 Equipped with sieve 6, sieve 6 is located at the top of feed opening 43, to make to be crushed qualified powdered material from sieve by sieve 6 6 drop out feed opening 43.

Please refer to 1 and Fig. 3, in this present embodiment, driving assembly 1 be rotating electric machine, the direction of rotation of rotating electric machine with turn The direction of rotation of axis 5 is consistent.Preferably it is, in order to reduce the velocity of rotation for making driving assembly 1, the crusher of the utility model 100 further include reduction assemblies (not shown), and reduction assemblies are connected between driving assembly 1 and shaft 5.Wherein, reduction assemblies Including small pulley, big belt wheel and synchronous belt, the output end of small pulley and rotating electric machine is connected, and big belt wheel is connect with shaft, synchronous Band is around small pulley and big belt wheel；More specifically, in order to protect reduction assemblies, the crusher 100 of the utility model further includes protecting Shield 7, protective cover 7 cover reduction assemblies, so that reduction assemblies is escaped injury, but not limited to this.

Fig. 3 and Fig. 6 is please referred to, disruption elements 2 include that disk body 21, destruction knife 22, limit shaft 23 and bolt 24, disk body 21 are Three and in being fixedly sheathed in shaft 5, all disk bodies 21 are opened along the axially-spaced of shaft 5；Certainly, in other embodiments In, disk body 21 1, two, four or five are differed, therefore are not limited.Limit shaft 23 is in center pair along the axial direction of shaft 5 It is placed through on all disk bodies 21 with claiming；In this present embodiment, limit shaft 23 is three, certainly, in other embodiments, limit shaft 23 differ for one, two, four or five, therefore are not limited.It destroys knife 22 to be placed on limit shaft 23, and destroys 22, knife Between each disk body 21.Bolt 24 is along the both ends that the radial direction of shaft 5 inserts in limit shaft 23, to prevent the broken of head and tail portion Bad knife 22 flies out, while being convenient for changing and destroying knife 22.Specifically, limit shaft 23 has positioning disk body 21 and destroys determining for cutter position Bit architecture (not shown), for example, location structure are groove, and but not limited to this.When disruption elements 2 work, shaft 5 Drive disk body 21 to rotate around the center of circle of itself, disk body 21 drives the destruction knife 22 on limit shaft 5 to rotate, thus in conjunction with disk body 21 and Destroying knife 22 will be from the crushing material of feeding port 42.

In conjunction with attached drawing 1-7, the working principle of crusher 100 and its sealing device 3 to the utility model is illustrated: will Material imports in cracking cabin 41 from feeding port 42, then closes feeding port 42.Driving assembly 1 drives shaft 5 to rotate, shaft 5 The disruption elements 2 in cracking cabin 41 are then driven to rotate to the crushing material in cracking cabin 41.During comminuting matter, Screw element 31 in sealing device 3 is rotated also with shaft 5, so that dust be forced to move towards circulation with the screw thread on screw element 31 Movement, finally returns that cracking cabin 41, to prevent dust from running out of cracking cabin 41 and polluting the bearing 8 outside cracking cabin；Toward opening 34 It is passed through compressed air, so that the pressure of 31 tail portion of screw element is greater than the pressure on head, dust is further forced to return to cracking cabin 41. Specifically, in Fig. 7 and Fig. 8, due to shaft 5 along arrow N direction rotate, therefore the hand of spiral of the screw element 31 on right side with The direction of rotation of shaft 5 is identical, and the hand of spiral of the screw element 31 in left side is opposite with the direction of rotation of shaft 5；Therefore, turning In 5 rotary course of axis, it is greater than screw element 31 of right side that 31 tail portion of screw element on right side, which does not enter the pressure before compressed air, The pressure (being equivalent to the pressure in cracking cabin 41) in portion, into after compressed air, the 31 tail portion pressure of screw element on right side increases, more Add and dust is promoted to return in cracking cabin 41 from right side；Similarly, 31 tail portion of screw element in left side does not enter the pressure before compressed air Greater than the pressure (being equivalent to the pressure in cracking cabin 41) on 31 head of screw element in left side, into after compressed air, the spiral shell in left side 31 tail portion pressure of line part increases, and more promotion dust returns in cracking cabin 31 from left side.The person of being worth noting, the head of screw element 31 Refer to one end towards cracking cabin 41, and the tail portion of screw element 31 refers to one end far from cracking cabin 41.

Compared with prior art, the crusher 100 of the utility model is installed on shaft 5 and shell 4 by sealing device 3 Through part P, therefore the material in cracking cabin 41 will not be run out of outside cracking cabin 41；Furthermore sealing device 3 passes through screw element 31 and filler The mutual cooperation of letter 32, when shaft 5 rotates, screw element 31 is rotated together with shaft 5, under the action of screw element 31 rotates 31 head of screw element and tail portion is caused to generate pressure difference, so that powdered material be forced to move towards movement along the screw thread of screw element 31 When return to cracking cabin 41, therefore be used as first of seal approach by screw element 31；Again by offered on stuffing-box 32 with The opening 34 that clearance space 33 communicates further makes the gas of 31 tail portion of screw element when being passed through compressed gas toward the opening 34 Pressure is greater than the air pressure on head, therefore dust is forced to return to cracking cabin 41；Therefore the crusher 100 of the utility model and its sealing device 3 Under the dual sealing functions of screw element 31 and stuffing-box 32, powdered material is forced to return in cracking cabin 41.

Above disclosed is only the preferred embodiments of the utility model, and the power of the utility model cannot be limited with this Sharp range, therefore equivalent variations made according to the claim of the utility model belong to the range that the utility model is covered.

Claims (10)

1. a kind of sealing device is sealed suitable for the cracking cabin to crusher, the crusher includes to have hollow structure Shell and shaft through the shell, the hollow structure form the cracking cabin, it is characterised in that: the sealing device Including screw element and stuffing-box, the screw element is sheathed on the through part in the shaft and being located at the shell, the screw thread Also with the through part clearance fit of the shell, the stuffing-box is located at outside the cracking cabin part, the first end of the stuffing-box It in clearance fit is sheathed on the screw element and is sealingly engaged with the shell, the second end of the stuffing-box is in hermetically It is placed in the shaft, the stuffing-box, shaft, screw element and shell cross the gap being connected to the cracking cabin jointly Space offers the opening for being passed through compressed air and being connected with the clearance space on the stuffing-box.

2. sealing device according to claim 1, which is characterized in that further include outside framework oil seal, the outside framework oil seal is in institute Radially being placed between the shaft and the stuffing-box for shaft is stated, the outside framework oil seal is close in the axial direction of the shaft The second end of the second end of the stuffing-box, the stuffing-box passes through the outside framework oil seal and the rotating shaft sealing, the filler Letter, shaft, screw element, shell and outside framework oil seal cross the clearance space jointly.

3. sealing device according to claim 2, which is characterized in that further include retaining ring, the retaining ring is placed on the shaft Between the outside framework oil seal, the retaining ring is close to the outside framework oil seal in the axial direction of the shaft, and the of the stuffing-box Cooperation and the rotating shaft sealing of two ends by both the outside framework oil seal and retaining ring, the stuffing-box, shaft, screw element, Shell, outside framework oil seal and retaining ring cross the clearance space jointly.

4. sealing device according to claim 3, which is characterized in that further include the gland being placed on in the shaft, institute It states gland to be also fixedly connected with the second end of the stuffing-box, the gland and the stuffing-box are along the axial common of the shaft Clamp the outside framework oil seal and retaining ring.

5. sealing device according to claim 1, which is characterized in that the screw element be with externally threaded helix tube, The screw element is placed in the shaft in interference or transition fit.

6. sealing device according to claim 5, which is characterized in that the relatively described shaft of the hand of spiral of the screw element Axial line inclination.

7. a kind of crusher, including the shell with hollow structure and through the shaft of the shell, the hollow structure is formed Cracking cabin, it is characterised in that: the crusher further includes sealing device according to claim 1-6, described close Seal apparatus is installed on the through part of both the shaft and the shell.

8. crusher according to claim 7, which is characterized in that the shaft axially penetrates through the left side of the shell along it And right side, the left side through part of both the shaft and shell are equipped with the sealing device, both the shaft and shell Right side through part is equipped with the sealing device, in the sealing device of the left and right sides hand of spiral of the screw element of one with The direction of rotation of the shaft is identical, in the sealing device of the left and right sides hand of spiral of the screw element of another one with it is described The direction of rotation of shaft is opposite.

9. crusher according to claim 7, which is characterized in that further include driving assembly and disruption elements, the driving Component is connect with the shaft, and the disruption elements are placed in the shaft, and the disruption elements are located in the cracking cabin.

10. crusher according to claim 9, which is characterized in that the disruption elements include disk body, limit shaft, destruction Knife and bolt, the disk body at least two and in being fixedly sheathed in the shaft, all disk bodies are along the shaft It is axially-spaced open, the limit shaft is placed through on all disk bodies along the axial direction of the shaft, the destruction broach shell in On the limit shaft, the bolt inserts on the limit shaft along the radial direction of the shaft.