CN209313589U - The dynamic sealing device of motor shaft - Google Patents

Abstract

A kind of dynamic sealing device of motor shaft, including the oil sealing that can be assemblied on motor shaft, it is characterized by also including the shells that power supply arbor passes through, the oil sealing is contained in the shell, and the oil sealing includes the first oil sealing and the second oil sealing arranged side by side, the hard tubular support frame being clamped between the first oil sealing and the second oil sealing is additionally provided in the shell simultaneously, the support frame and first, the coaxial arrangement of second oil sealing, the peripheral wall of support frame as described above is equipped at least one fuel feed hole, the wall of the shell is equipped with oil filler point, the seal lip of oil sealing is connected to by the fuel feed hole with the oil filler point.The utility model relates to motor shaft dynamic sealing device, supplemental lubrication agent can be continued, sealing effect is stablized, and the dry grinding phenomenon of oil sealing and motor shaft is effectively reduced, and extends motor service life.

Description

The dynamic sealing device of motor shaft

Technical field

The utility model relates to a kind of sealing devices, more particularly, to a kind of dynamic sealing device of motor shaft.

Background technique

The application of motor is very wide, such as applies on the power device as the water surface or submarine navigation device, by motor The power of generation is transformed into the power of ship traveling, thus push ship to advance, retreat or turn to,.In order to avoid use process The situations such as the infiltration of middle appearance, permeable lead to motor damage, cause water also for avoiding the oil in motor from being leaked into water body Body pollution, it is usually necessary to use sealing elements to be sealed between motor shaft and end cap.

Outside framework oil seal is widely used in sealing because it is easily assembled, cost performance is high.When assembling oil sealing, package electricity The oil seal lip of arbor only smears some lubricating grease, and after a period of use, grease loses sealing effect, and oil sealing because of exsiccation Lip and motor shaft are in dry condition for a long time, and motor shaft easily grinds gap, not only reduce the service life of electric axis, but also The sealing effect for further influencing motor shaft, be easy to cause motor damage, influences the service life of motor.

The Chinese utility model of Patent No. CN 201420254940.9 (Authorization Notice No. is CN 203967877U) is special Benefit discloses a kind of motor shaft sealing device, including motor shaft, bearing, end cap and oil sealing；Bearing is assemblied on motor shaft, bearing It is installed in the bearing chamber of end cap, oil sealing is set in the oil seal groove of end cap, and oil sealing surrounds close together with motor shaft, bearing, end cap Space is sealed, a certain amount of lubricating grease can be stored in the sealing space to provide prolonged profit for motor shaft, bearing and oil sealing It is sliding.Although such design increases the fat content on oil sealing, the oil sealing sealing effect of motor shaft has been appropriately extended, oil Envelope and motor shaft, bearing, the sealing space that is formed between end cap are limited, and the lubricating grease content of storage is also less, once the sealing The lubricating grease stored in space runs out of, and still can generate sealing and be not enough to the problems such as causing motor infiltration, oil leakage, Wu Facong Fundamentally solve the problems, such as oil sealing and motor shaft because lubricating grease deficiency due to dry grind caused by motor shaft abrasion and dynamo oil reveal.

Utility model content

Technical problem to be solved in the utility model be for the above-mentioned state of the art and provide one kind can continue mend Lubricant is filled to promote the dynamic sealing device of dynamic sealing effect, the motor shaft for extending motor service life.

Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of dynamic sealing device of motor shaft, Including the oil sealing that can be assemblied on motor shaft, it is characterised in that: further include the shell that power supply arbor passes through, the oil sealing holds It is contained in the shell, and the oil sealing includes the first oil sealing and the second oil sealing arranged side by side, while being additionally provided in the shell The hard tubular support frame being clamped between the first oil sealing and the second oil sealing, the support frame are coaxially set with the first, second oil sealing It sets, the peripheral wall of support frame as described above is equipped at least one fuel feed hole, and the wall of the shell is equipped with oil filler point, the sealing lip of oil sealing Mouth is connected to by the fuel feed hole with the oil filler point.

The material of tubular support frame can be metal or ceramics etc., provide as long as its intensity requirement can satisfy for oil sealing Supporting role.The percussion that motor shaft can generate oil sealing during rotating is larger, and seal lip is made in biggish impact It is easy to generate gap between motor shaft with lower, influences the effect of dynamic sealing, and be clamped in the support frame energy among two oil sealings Certain supporting role is enough provided for oil sealing, it is more stable to be more favorable for use process sealing effect.

In order to increase lubricant storage cavity volume, first oil sealing and the second oil sealing are right centered on support frame Claim distribution.

Be further improved, there is on the both ends outer wall of support frame as described above the annular wall radially extended, each annular wall with it is described The closed area formed between inner walls is shoe cream room, and the oil filler point is located at housing wall corresponding with the shoe cream room On.The shoe cream room that support frame and inner walls are formed can store suitable lubricant, and being capable of continuously supplemental lubrication Agent both avoids generating the phenomenon that disposably storing the more leakage pollution motor inside for be easy to causeing lubricant and water body environment, Also the phenomenon that avoiding lack of lubrication caused by the lubricant starvation of storage, user can supplemental lubrication agent according to the actual situation；And And when gland seal device is longer using the time, the impurity brought into during lubricant supplement for a long time can be deposited in shoe cream room, The design of fuel feed hole can obstruct a part of impurity and enter oil seal lip generation gap, also be easy to cause motor shaft scratch, finally Influence sealing effect.

In order to more uniformly be the agent of oil sealing supplemental lubrication, the fuel feed hole is evenly distributed on support frame as described above peripheral wall.

Enter the first line of defence of motor as barrier foreign matter and water, on the shell center of first end end wall at Type has the through-hole with motor shaft diameter matches.

In order to carry out axial limiting to oil sealing, the card for resisting the oil sealing end face is equipped with inside the second end of the shell Spring.

For the ease of installing dynamic sealing device on motor, convex shoulder is formed on the shell periphery wall, on the convex shoulder Equipped with fixation hole.

The leakproofness of motor when in order to enhance dynamic sealing device assembly, towards the one of the second end of the housing on the convex shoulder Lateral sunken inside has the annular groove that can accommodate sealing ring.

In order to facilitate supplemental lubrication agent, wall of the oil filler point between the convex shoulder and the first end of the shell On, and the neighbouring convex shoulder is arranged.

Compared with the prior art, the advantages of the utility model are: continual suitable profit can be supplemented for oil sealing Lubrication prescription avoids motor shaft abrasion caused by the lubricant starvation influence leakproofness of dynamic sealing device and the dry grinding with motor shaft etc. Phenomenon promotes the sealing effect of dynamic sealing device, extends the service life of motor；Oil storage space increases, and provides for motor operation The period for lubricating sealing is longer, reduces the frequency of make-up oil；With stronger supporting role, oil sealing responds the work of motor shaft The deformation extent that firmly generates reduces, and it is lower to be supplemented to impurity content in the lubricant of oil seal lip, thus reduce impurity into Enter a possibility that seal lip generates gap or motor shaft generation scratch, keeps sealing effect more stable.

Detailed description of the invention

Fig. 1 is the stereoscopic schematic diagram of the utility model embodiment；

Fig. 2 is the axial section of Fig. 1；

Fig. 3 is the axial section after the utility model embodiment is assemblied on motor shaft.

Specific embodiment

The utility model is described in further detail below in conjunction with figure embodiment.

As shown in Figure 1-3, being a preferred embodiment of the utility model.

As shown in Figs. 1-2, a kind of dynamic sealing device of motor shaft, including the shell 1 and can fill that arbor 2 passes through of powering The oil sealing on motor shaft 2 is fitted over, oil sealing is contained in shell 1.In order to enhance sealing effect, oil sealing includes arranged side by side first Oil sealing 31 and the second oil sealing 32.It is clamped with hard tubular support frame 4 between first oil sealing 31 and the second oil sealing 32, the support frame 4 It is coaxially disposed with the first, second oil sealing, and the first oil sealing 31 and the second oil sealing 32 are symmetrical centered on support frame 4.Support There is the annular wall 41 radially extended, the closed area formed between 1 inner wall of each annular wall 41 and shell on the both ends outer wall of frame 4 For shoe cream room 5.Being provided on 1 wall of shell corresponding with shoe cream room 5 can be the oil filler point 10 of oil sealing supplemental lubrication agent, branch Multiple fuel feed holes 40 are evenly equipped on the peripheral wall of support 4.The seal lip of oil sealing is connected to by fuel feed hole 40 with oil filler point 10.When need When wanting supplemental lubrication agent, the lubricant injected from oil filler point 10 will be temporarily stored in shoe cream room 5, with the lubrication of oil seal lip Agent constantly consumes, and the lubricant in shoe cream room 5 gradually enters from fuel feed hole 40 and infiltrate into the oil seal lip at both ends, Make there are enough lubricants to form sealing oil film at oil seal lip, oil sealing and motor shaft 2 is avoided dry grinding phenomenon occur.

The dynamic sealing device can be assemblied on motor shaft 2, be entered first of motor as barrier foreign matter and water Defence line, the end wall center of the first end of shell 1 form the through-hole 12 with 2 diameter matches of motor shaft.Inside the second end of shell 1 Equipped with the circlip 6 for resisting 32 end face of the second oil sealing, the active force that motor shaft 2 applies oil seal lip during rotating is easy to draw The variation of oil sealing axial displacement is played, once oil seal lip generates displacement and gap occurs, is affected to the leakproofness of motor, is blocked Spring 6 can carry out the limit in axial direction to oil sealing and support frame 4, be conducive to more stable sealing effect.1 periphery wall of shell is also The annular convex shoulder 11 being easily installed in motor output end is formed, sets that there are three can accommodate the fixation hole of fastener on convex shoulder 11 111.It is understood that in other embodiments, the shape of convex shoulder 11 can also be only be arranged in it is more on 1 periphery wall of shell The quantity of a lug, fixation hole 111 is also possible to other quantity, if can be realized on motor assemble when positioning function i.e. It can.The side of convex shoulder 11 towards 1 second end of shell, which is recessed inwardly, can accommodate the annular groove 112 of sealing ring 7.Further, Oil filler point 10 is on 1 wall of shell between convex shoulder 11 and the first end of shell 1, and neighbouring convex shoulder 11 is arranged.

As shown in figure 3, the dynamic sealing device is mounted on the assembly direction on motor shaft 2 are as follows: the shell 1 of the dynamic sealing device First end towards the output end of motor, the second end of the shell 1 of the dynamic sealing device is opposite with the output end of motor.The shell The second end of body 1 is inserted in the groove of front motor cover 8, and is fixed by screws on front motor cover 8.1 outer wall of shell is with before The intersection that lid 8 contacts is sealed using sealing ring 7, can further be completely cut off the outside and inside of motor in this way, be avoided in motor Portion's water inlet.Finally, the end of motor is fixed by the sealing of end cap 9.The dynamic sealing device of the motor shaft can be the operation of motor Good sealing function is provided, and supplemental lubrication agent can be continued, ensures that seal lip there are enough lubricants to form Seal Oil Film avoids seal failure caused by lacking lubricant and dry grinding phenomenon, and device is readily disassembled maintenance.When requiring supplementation with lubricant When, end cap 9 is opened, the plug cock in oil filler point 10 is removed, suitable lubricant reservoir is injected in shoe cream room 5, with motor shaft 2 Rotation, the lubricant in shoe cream room 5 can constantly enter from fuel feed hole 40 and infiltrate into the first oil sealing 31 and the second oil sealing 32 Lip at, good lubrication is carried out to oil seal lip, makes the dynamic sealing device of the motor shaft that there is continual and steady sealing Effect；When not needing supplemental lubrication agent, oil filler point 10 is blocked with plug cock, prevents the leakage of lubricant contaminant water in shoe cream room 5 Body.

Claims (9)

1. a kind of dynamic sealing device of motor shaft, including the oil sealing that can be assemblied on motor shaft (2), it is characterised in that: also wrap The shell (1) that power supply arbor (2) passes through is included, the oil sealing is contained in the shell (1), and the oil sealing includes being arranged side by side The first oil sealing (31) and the second oil sealing (32), while being additionally provided in the shell (1) and being clamped in the first oil sealing (31) and the Hard tubular support frame (4) between two oil sealings (32), the support frame (4) and the first, second oil sealing are coaxially disposed, the support The peripheral wall of frame (4) is equipped at least one fuel feed hole (40), and the wall of the shell (1) is equipped with oil filler point (10), oil sealing it is close Envelope lip is connected to by the fuel feed hole (40) with the oil filler point (10).

2. the dynamic sealing device of motor shaft according to claim 1, it is characterised in that: first oil sealing (31) and the second oil It is symmetrical centered on support frame (4) to seal (32).

3. the dynamic sealing device of motor shaft according to claim 1, it is characterised in that: the both ends outer wall of support frame as described above (4) Upper to have the annular wall (41) radially extended, the closed area formed between each annular wall (41) and the shell (1) inner wall is Shoe cream room (5), the oil filler point (10) are located on shell (1) wall corresponding with the shoe cream room (5).

4. the dynamic sealing device of motor shaft according to claim 3, it is characterised in that: on support frame as described above (4) peripheral wall Fuel feed hole described in cloth (40).

5. according to claim 1 to the dynamic sealing device of motor shaft described in 4 any claims, it is characterised in that: the shell The center of first end end wall forms and the through-hole (12) of motor shaft (2) diameter matches on body (1).

6. the dynamic sealing device of motor shaft according to claim 5, it is characterised in that: in the second end of the shell (1) Portion is equipped with the circlip (6) for resisting the oil sealing end face.

7. the dynamic sealing device of motor shaft according to claim 6, it is characterised in that: on shell (1) periphery wall at Type has convex shoulder (11), and the convex shoulder (11) is equipped with fixation hole (111).

8. the dynamic sealing device of motor shaft according to claim 7, it is characterised in that: on the convex shoulder (11) described in The side of shell (1) second end is recessed inwardly and can accommodate the annular groove of sealing ring (7) (112).

9. the dynamic sealing device of motor shaft according to claim 8, it is characterised in that: the oil filler point (10) is located at described On wall between convex shoulder (11) and the first end of the shell (1), and neighbouring the convex shoulder (11) are arranged.