CN204477305U - A kind of mechanical shaft seal structure - Google Patents

A kind of mechanical shaft seal structure Download PDF

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Publication number
CN204477305U
CN204477305U CN201520125762.4U CN201520125762U CN204477305U CN 204477305 U CN204477305 U CN 204477305U CN 201520125762 U CN201520125762 U CN 201520125762U CN 204477305 U CN204477305 U CN 204477305U
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CN
China
Prior art keywords
annular
rotatingshaft
seal
shaft seal
ring
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520125762.4U
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Chinese (zh)
Inventor
刘富豪
徐进
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Yangcheng Institute of Technology
Yancheng Institute of Technology
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Yangcheng Institute of Technology
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Priority to CN201520125762.4U priority Critical patent/CN204477305U/en
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Publication of CN204477305U publication Critical patent/CN204477305U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of mechanical shaft seal structure, aim to provide one and can effectively solve retarder in prior art once there is shaft seal leakage of oil, then need to change shaft seal, waste time and energy, problem that workload is large, when providing one effectively can solve current reducer shaft leak sealing oil, then need to change shaft seal, waste time and energy, the mechanical shaft seal structure of problem that workload is large.It comprises reduction case, rotatingshaft and shaft seal end cap, and described rotatingshaft passes shaft seal end cap and is arranged on reduction case by bearing, is provided with oil sealing between described shaft seal end cap and rotatingshaft; Oil seal structure for subsequent use is also provided with between described shaft seal end cap and rotatingshaft.

Description

A kind of mechanical shaft seal structure
Technical field
The utility model relates to a kind of shaft seal structure, is specifically related to a kind of mechanical shaft seal structure of retarder.
Background technique
Retarder is a kind of mechanical transmission common at present, and it plays coupling rotating speed and transmitting torque between prime mover and working machine or actuator.Current reducer structure generally includes casing, rotatingshaft, input gear, rotatingshaft end-blocking lid, output gear, output shaft and output shaft end-blocking lid, they successively transmission complete speed-down action.Shaft seal is provided with between shaft seal end cap and input/shaft; And shaft seal leakage of oil is bad problem common in current retarder, one shaft seal leakage of oil occurs needs to change oil sealing timely.Cause the reason of shaft seal leakage of oil varied, more common reason comprise shaft seal (seal ring) wear and tear in Long-Time Service process or grease accumulation in reasons such as shaft seal places, all can easily cause retarder input/shaft shaft seal place produce Leakage.Current retarder once there is shaft seal Leakage, then needs to change shaft seal; And when changing shaft seal, need speed reducer to disintegrate, pull down coupling, take out reductor shaft end-blocking lid, then change shaft seal, and reinstall; This make the workload changing shaft seal this process large, waste time and energy.
Model utility content
First object of the present utility model is to overcome deficiency of the prior art, provides one not only to have good intensity; And there is the electric vehicle compound gear of good vibration damping, noise reduction.
Another object of the present utility model is not enough in order to overcome in prior art, one is provided can effectively to improve because of reasons such as lubrication system fault or lubrication system fluid deficiencies, cause gear lubrication bad, reduce the electric vehicle compound gear of the problem in gear shaft working life.
The technical solution of the utility model is:
The purpose of this utility model is once there is shaft seal leakage of oil in order to overcome retarder in prior art, then need to change shaft seal, waste time and energy, problem that workload is large, when providing one effectively can solve current reducer shaft leak sealing oil, then need to change shaft seal, waste time and energy, the mechanical shaft seal structure of problem that workload is large.
The technical solution of the utility model is:
A kind of mechanical shaft seal structure, comprises reduction case, rotatingshaft and shaft seal end cap, and described rotatingshaft passes shaft seal end cap and is arranged on reduction case by bearing, is provided with oil sealing between described shaft seal end cap and rotatingshaft, oil seal structure for subsequent use is also provided with between described shaft seal end cap and rotatingshaft, this oil seal structure for subsequent use is positioned at outside reduction case, and oil seal structure for subsequent use comprises the fixing body be arranged on shaft seal end cap exterior edge face and the slip body be slidably arranged in fixing body, described fixing body is set on rotatingshaft, and coaxially arranges with rotatingshaft, and described slip body is set on rotatingshaft, and coaxially arranges with rotatingshaft, be provided with the first exterior seal ring between described fixing body and slip body, between described slip body and rotatingshaft, be provided with the first inner seal ring, and the first inner seal ring is fixed on slip body inner side surface, on described rotatingshaft outer side surface, be positioned at and be provided with the first annular outside reduction case and step down groove, described fixing body inner side surface is provided with annular spacing block set in the first outer ring spacing block set and first, and annular spacing block set is between shaft seal end cap and the first outer ring spacing block set in first, described first exterior seal ring and shaft seal end cap are positioned at the same side of the first annular spacing block set, the second annular stop projection is provided with between annular spacing block set on described flip sleeve outside, in the first outer ring spacing block set and first, described fixed cover outside is provided with annular stop plate, this annular stop plate is provided with the uniform axial hole of some circumferences, and axial hole parallels with rotatingshaft, each axial hole is slidably provided with Limit screw respectively, each Limit screw is connected with slip body respectively by connecting rod, each Limit screw is respectively equipped with stop nut, and stop nut is between annular stop plate and shaft seal end cap, on described Limit screw, be provided with between annular stop plate and connecting rod and the second annular stop projection can be made to be resisted against the first pretension Compress Spring on the first outer ring spacing block set, when the second annular stop projection is resisted against on the first outer ring spacing block set, described first inner seal ring is positioned at the first annular and steps down groove, and the first inner seal ring and the first annular are stepped down between groove inner wall and be provided with gap, when the second annular stop projection to be resisted against in first on annular spacing block set, described first inner seal ring and the first annular groove of stepping down is in staggered distribution, and forms Hermetical connecting structure between slip body and rotatingshaft.
When the shaft seal leakage of oil of this programme rotatingshaft (during oil sealing leakage of oil), only need slip body to push away toward in, the second annular stop projection is resisted against in first on annular spacing block set, and stop nut is locked on annular stop plate.When the second annular stop projection to be resisted against in first after on annular spacing block set, the first inner seal ring and the first annular groove of stepping down is in staggered distribution, and forms Hermetical connecting structure between slip body and rotatingshaft; Thus form new Hermetical connecting structure between slip body outside shaft seal and rotatingshaft, solve shaft seal Leakage, disintegration speed reducer can be eliminated like this, tear the operation that shaft joint etc. wastes time and energy open; Can effectively solve retarder in prior art once there is the shaft seal leakage of oil of rotatingshaft, then need speed reducer to disintegrate, pull down coupling, take out reductor shaft end-blocking lid, then change shaft seal, and reinstall, waste time and energy, problem that workload is large.
As preferably, be provided with axis hole in the middle part of shaft seal end cap, described rotatingshaft is through this axis hole, and described axis hole inner side surface is provided with first and second oil sealing mounting groove, and the first oil sealing mounting groove is between the second oil sealing mounting groove and slip body; Described oil sealing comprises the first O-ring seal be arranged in the first oil sealing mounting groove and the second O-ring seal be arranged in the second oil sealing mounting groove.
As preferably, be provided with the annular pressing plate that can move axially along rotatingshaft in the first oil sealing mounting groove, annular pressing plate is on the rotating shaft sheathed; Described annular pressing plate is between the first O-ring seal and slip body, and the first O-ring seal and annular pressing plate fit tightly; Be provided with at least two guide through hole paralleled with rotatingshaft in described first oil sealing mounting groove side, near the side of slip body, and each guide through hole rotates, moving axis circumference is uniform; Slidably be provided with axial push rod respectively in each guide through hole, one end of axial push rod is connected with annular pressing plate, and the other end is positioned at fixing body, and described annular pressing plate and axial push rod are positioned at the same side of slip body; When the second annular stop projection is resisted against on the first outer ring spacing block set, between described axial push rod and slip body, there is gap; When slip body is passed toward the first O-ring seal direction, and when making the second annular stop projection be resisted against in first on annular spacing block set, the end face of described slip body is resisted against the end of axial push rod, and axial push rod is passed 0.2 to 1 millimeter toward the first O-ring seal direction.
When the shaft seal leakage of oil of this programme rotatingshaft, slip body pushes away toward in by operation, and the second annular stop projection to be resisted against in first after on annular spacing block set, the end face of slip body is resisted against the end of axial push rod, and axial push rod is passed 0.2 to 1 millimeter toward oil sealing direction; Such annular pressing plate will push the first O-ring seal, to protrude toward rotatingshaft after the first O-ring seal is by annular pressing plate extruding, increase the mating face between the first O-ring seal and rotatingshaft and positive pressure, thus the Hermetical connecting structure repaired between the first O-ring seal and rotatingshaft, and coordinate input oil seal structure for subsequent use, new one-tenth front and back two seals structure, improves the sealing effect of rotatingshaft further on the rotating shaft, effective solution further, prevention shaft seal Leakage.
As preferably, the first O-ring seal is hollow O-ring seal.Due to the O-ring seal that the first O-ring seal is hollow, hollow O-ring seal has larger deformation quantity and preferably deformation effects, the first O-ring seal will be conducive to like this after the first O-ring seal is by annular pressing plate extruding to protrude toward rotatingshaft, mating face between further increase first O-ring seal and rotatingshaft and positive pressure, thus repair the Hermetical connecting structure between the first O-ring seal and rotatingshaft.
As preferably, be threaded connection between axial push rod and annular pressing plate.
As preferably, the step down cross section of groove of the first annular is circular arc.
As preferably, connecting rod extends along rotatingshaft radial direction, and connecting rod is positioned at the external side of fixed cover.
As preferably, flip sleeve outside is provided with the first exterior seal ring mounting groove, and described first exterior seal ring is fixedly installed in the first exterior seal ring mounting groove.
As preferably, slip body inner side surface is provided with the first inner seal ring mounting groove, and described first inner seal ring is fixedly installed in the first inner seal ring mounting groove.
The beneficial effects of the utility model are: when effectively can solve current reducer shaft leak sealing oil, then need to change shaft seal, waste time and energy, problem that workload is large.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Fig. 3 is a kind of partial structurtes schematic diagram of the second annular stop projection of the present utility model when to be resisted against in first on annular spacing block set.
In figure: rotatingshaft 1a, reduction case 1b, shaft seal end cap 2, axis hole 21, first oil sealing mounting groove 22, second oil sealing mounting groove 23, oil sealing 3, first O-ring seal 31, second O-ring seal 32, oil seal structure 4 for subsequent use, fixing body 41, first exterior seal ring 42, first annular is stepped down groove 43, first inner seal ring 44, slip body 45, Limit screw 46, first pretension Compress Spring 47, first outer ring spacing block set 48, second annular stop projection 49, annular spacing block set 410 in first, stop nut 411, annular stop plate 412, annular pressing plate 5, axial push rod 51.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
Embodiment 1: as shown in Figure 1, and a kind of mechanical shaft seal structure comprises reduction case 1b, rotatingshaft 1a and shaft seal end cap 2.Rotatingshaft is passed shaft seal end cap and is arranged on reduction case by bearing.Oil sealing 3 is provided with between shaft seal end cap and rotatingshaft.Oil sealing is seal ring.Oil seal structure 4 for subsequent use is also provided with between shaft seal end cap and rotatingshaft.This oil seal structure for subsequent use is positioned at outside reduction case.
As shown in Figure 1 and Figure 2, oil seal structure for subsequent use comprises the fixing body 41 be arranged on shaft seal end cap exterior edge face and the slip body 45 be slidably arranged in fixing body.Fixing body is set on rotatingshaft, and coaxially arranges with rotatingshaft.Slip body is set on rotatingshaft, and coaxially arranges with rotatingshaft.Fix and between body and slip body, be provided with the first exterior seal ring 42.Flip sleeve outside is provided with the first exterior seal ring mounting groove, and the first exterior seal ring is fixedly installed in the first exterior seal ring mounting groove.Be provided with the first inner seal ring 44 between slip body and input shaft, and the first inner seal ring is fixed on slip body inner side surface.Slip body inner side surface is provided with the first inner seal ring mounting groove, and the first inner seal ring is fixedly installed in the first inner seal ring mounting groove.On input shaft outer side surface, be positioned at and be provided with the first annular outside casing and step down groove 43.The step down cross section of groove of first annular is circular arc.
Fixing body inner side surface is provided with annular spacing block set 410 in the first outer ring spacing block set 48 and first, and in first annular spacing block set between shaft seal end cap and the first outer ring spacing block set.First exterior seal ring and shaft seal end cap are positioned at the same side of the first annular spacing block set.The second annular stop projection 49 is provided with between annular spacing block set on flip sleeve outside, in the first outer ring spacing block set and first.
Fixed cover outside is provided with annular stop plate 412.This annular stop plate is provided with the uniform axial hole of some circumferences, and axial hole parallels with rotatingshaft.Each axial hole is slidably provided with Limit screw 46 respectively.Each Limit screw is connected with slip body respectively by connecting rod.Connecting rod extends along rotatingshaft radial direction, and connecting rod is positioned at the external side of fixed cover.Each Limit screw is respectively equipped with stop nut 411, and stop nut is between annular stop plate and shaft seal end cap.The first pretension Compress Spring 47 is provided with on Limit screw, between annular stop plate and connecting rod.This first pretension Compress Spring can make the second annular stop projection be resisted against on the first outer ring spacing block set.
As shown in Figure 2, when the second annular stop projection is resisted against on the first outer ring spacing block set, the first inner seal ring is positioned at the first annular and steps down groove, and the first inner seal ring and the first annular are stepped down between groove inner wall and be provided with gap.As shown in Figure 3, when the second annular stop projection to be resisted against in first on annular spacing block set, the first inner seal ring and the first annular groove of stepping down is in staggered distribution, and forms Hermetical connecting structure between slip body and rotatingshaft.
As shown in Figure 1 and Figure 2, when oil seal structure for subsequent use does not work, second annular stop projection is resisted against on the first outer ring spacing block set, and the first inner seal ring is positioned at the first annular and steps down groove, and the first inner seal ring and the first annular are stepped down between groove inner wall and be provided with gap; In retarder working procedure, the first inner seal ring can not be worn like this.
As shown in Figure 1, Figure 3, when the shaft seal leakage of oil of rotatingshaft, operator only needs slip body to pass toward oil sealing direction, the second annular stop projection is resisted against in first on annular spacing block set, and is locked on annular stop plate by stop nut.When the second annular stop projection to be resisted against in first after on annular spacing block set, the first inner seal ring and the first annular groove of stepping down is in staggered distribution, and forms Hermetical connecting structure between slip body and rotatingshaft; Thus form new Hermetical connecting structure between slip body outside shaft seal and rotatingshaft, solve shaft seal Leakage.
Embodiment 2: all the other structures of the present embodiment are with reference to embodiment 1, and its difference is:
Axis hole 21 is provided with in the middle part of shaft seal end cap.Rotatingshaft 1a is through this axis hole.Axis hole inner side surface is provided with first and second oil sealing mounting groove 22,23, and the first oil sealing mounting groove 22 is between the second oil sealing mounting groove 23 and slip body 45.Oil sealing comprises the first O-ring seal 31 be arranged in the first oil sealing mounting groove and the second O-ring seal 32 be arranged in the second oil sealing mounting groove.First O-ring seal is hollow O-ring seal.
The annular pressing plate 5 that can move axially along rotatingshaft is provided with in first oil sealing mounting groove.Annular pressing plate is on the rotating shaft sheathed.Annular pressing plate is between the first O-ring seal and slip body.First O-ring seal and annular pressing plate fit tightly; Simultaneously the first O-ring seal and the first oil sealing mounting groove bottom surface and fit tightly away from the first oil sealing mounting groove side of slip body.Be provided with four guide through hole paralleled with rotatingshaft in first oil sealing mounting groove side, near the side of slip body, and each guide through hole rotates, moving axis circumference is uniform.Axial push rod 51 is slidably provided with respectively in each guide through hole.One end of axial push rod is connected with annular pressing plate, and the other end is positioned at fixing body.Be threaded connection between axial push rod and annular pressing plate.Annular pressing plate and axial push rod are positioned at the same side of slip body.
As shown in Figure 2, when the second annular stop projection is resisted against on the first outer ring spacing block set, between axial push rod and slip body, there is gap.
As shown in Figure 3, when slip body is passed toward the first O-ring seal direction, and when making the second annular stop projection be resisted against in first on annular spacing block set, the end face of slip body is resisted against the end of axial push rod, and axial push rod is passed 0.2 millimeter or 0.4 millimeter or 0.6 millimeter or 1 millimeter toward the first O-ring seal direction.

Claims (6)

1. a mechanical shaft seal structure, comprises reduction case, rotatingshaft and shaft seal end cap, and described rotatingshaft passes shaft seal end cap and is arranged on reduction case by bearing, it is characterized in that, is provided with oil sealing between described shaft seal end cap and rotatingshaft; Oil seal structure for subsequent use is also provided with between described shaft seal end cap and rotatingshaft, this oil seal structure for subsequent use is positioned at outside reduction case, and oil seal structure for subsequent use comprises the fixing body be arranged on shaft seal end cap exterior edge face and the slip body be slidably arranged in fixing body; Described fixing body is set on rotatingshaft, and coaxially arranges with rotatingshaft, and described slip body is set on rotatingshaft, and coaxially arranges with rotatingshaft;
Be provided with the first exterior seal ring between described fixing body and slip body, between described slip body and rotatingshaft, be provided with the first inner seal ring, and the first inner seal ring is fixed on slip body inner side surface; On described rotatingshaft outer side surface, be positioned at and be provided with the first annular outside reduction case and step down groove; Described fixing body inner side surface is provided with annular spacing block set in the first outer ring spacing block set and first, and annular spacing block set is between shaft seal end cap and the first outer ring spacing block set in first, described first exterior seal ring and shaft seal end cap are positioned at the same side of the first annular spacing block set; The second annular stop projection is provided with between annular spacing block set on described flip sleeve outside, in the first outer ring spacing block set and first;
Described fixed cover outside is provided with annular stop plate, this annular stop plate is provided with the uniform axial hole of some circumferences, and axial hole parallels with rotatingshaft, each axial hole is slidably provided with Limit screw respectively, each Limit screw is connected with slip body respectively by connecting rod, each Limit screw is respectively equipped with stop nut, and stop nut is between annular stop plate and shaft seal end cap, on described Limit screw, be provided with between annular stop plate and connecting rod and the second annular stop projection can be made to be resisted against the first pretension Compress Spring on the first outer ring spacing block set,
When the second annular stop projection is resisted against on the first outer ring spacing block set, described first inner seal ring is positioned at the first annular and steps down groove, and the first inner seal ring and the first annular are stepped down between groove inner wall and be provided with gap; When the second annular stop projection to be resisted against in first on annular spacing block set, described first inner seal ring and the first annular groove of stepping down is in staggered distribution, and forms Hermetical connecting structure between slip body and rotatingshaft.
2. mechanical shaft seal structure according to claim 1, it is characterized in that, axis hole is provided with in the middle part of described shaft seal end cap, described rotatingshaft is through this axis hole, described axis hole inner side surface is provided with first and second oil sealing mounting groove, and the first oil sealing mounting groove is between the second oil sealing mounting groove and slip body; Described oil sealing comprises the first O-ring seal be arranged in the first oil sealing mounting groove and the second O-ring seal be arranged in the second oil sealing mounting groove.
3. mechanical shaft seal structure according to claim 2, is characterized in that, be provided with the annular pressing plate that can move axially along rotatingshaft in described first oil sealing mounting groove, annular pressing plate is on the rotating shaft sheathed; Described annular pressing plate is between the first O-ring seal and slip body, and the first O-ring seal and annular pressing plate fit tightly; Be provided with at least two guide through hole paralleled with rotatingshaft in described first oil sealing mounting groove side, near the side of the first slip body, and each guide through hole rotates, moving axis circumference is uniform; Slidably be provided with axial push rod respectively in each guide through hole, one end of axial push rod is connected with annular pressing plate, and the other end is positioned at the first fixing body, and described annular pressing plate and axial push rod are positioned at the same side of the first slip body;
When the second annular stop projection is resisted against on the first outer ring spacing block set, between described axial push rod and the first slip body, there is gap; When the first slip body is passed toward the first O-ring seal direction, and when making the second annular stop projection be resisted against in first on annular spacing block set, the end face of described first slip body is resisted against the end of axial push rod, and axial push rod is passed 0.2 to 1 millimeter toward the first O-ring seal direction.
4. mechanical shaft seal structure according to claim 3, is characterized in that, described first O-ring seal is hollow O-ring seal.
5. the mechanical shaft seal structure according to claim 3 or 4, is characterized in that, is threaded connection between described axial push rod and annular pressing plate.
6. mechanical shaft seal structure according to claim 1, is characterized in that, described connecting rod extends along rotatingshaft radial direction, and connecting rod is positioned at the external side of fixed cover.
CN201520125762.4U 2015-03-04 2015-03-04 A kind of mechanical shaft seal structure Expired - Fee Related CN204477305U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520125762.4U CN204477305U (en) 2015-03-04 2015-03-04 A kind of mechanical shaft seal structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520125762.4U CN204477305U (en) 2015-03-04 2015-03-04 A kind of mechanical shaft seal structure

Publications (1)

Publication Number Publication Date
CN204477305U true CN204477305U (en) 2015-07-15

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Application Number Title Priority Date Filing Date
CN201520125762.4U Expired - Fee Related CN204477305U (en) 2015-03-04 2015-03-04 A kind of mechanical shaft seal structure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104696526A (en) * 2015-03-04 2015-06-10 盐城工学院 Mechanical shaft seal structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104696526A (en) * 2015-03-04 2015-06-10 盐城工学院 Mechanical shaft seal structure

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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150715

Termination date: 20160304