Mechanical seal convenient for oil injection

Abstract

The utility model relates to a mechanical seal convenient for oil injection, which comprises a mounting seat, a rotating shaft rotationally mounted on the mounting seat, a static ring, a moving ring fixedly connected with the rotating shaft, a matched spring and a static ring gland positioned in the circumferential direction of the static ring, the bottom of the static ring gland abuts against the static ring, the static ring gland comprises an oil injection section which is located above the static ring and sleeved with the movable ring, an oil injection channel is formed in the oil injection section, a sealing plug is installed at the position, above the oil injection channel, of the oil injection section, and one end of the oil injection channel is communicated with the attaching position of the movable ring and the static ring. According to the mechanical seal convenient for oil injection, lubricating oil is filled into an oil injection channel of an oil injection section, so that the lubricating oil can reach the joint of a movable ring and a static ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal, especially mechanical seal convenient to oil injection. BACKGROUND

[0002] Mechanical seal is a kind of device for the seal between rotating shaft and fixed housing, and the main purpose is to prevent fluid (liquid or gas) leakage. It is usually applied to pump, compressor, agitator and other rotating equipment, and is one of the most common dynamic sealing forms in modern industry, and it mainly includes dynamic ring rotating with shaft, static ring fixed on housing, spring providing necessary pre-tightening force to make dynamic ring and static ring closely adhere and some auxiliary sealing rings.

[0003] Therefore, in mechanical seal, the contact surface between dynamic ring and static ring is a very critical sealing position, and dynamic ring and static ring are usually made of different materials, and are mutually rubbed in working, and the temperature between dynamic ring and static ring can be increased in the process of rubbing and "dry running" can occur in starting or operation, i.e. rotation without lubrication, which can quickly cause damage to sealing surface.

[0004] Therefore, how to realize lubrication between dynamic ring and static ring becomes a problem to be solved by the person skilled in the art. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a kind of mechanical seal convenient to oil injection by lubricating oil is loaded into the oil injection channel in oil injection section, and then lubricating oil can reach the place where dynamic ring and static ring adhere.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: including mounting seat, rotating shaft, static ring, dynamic ring and cooperation spring, still including static ring gland located in the circumference of static ring, static ring gland is fixedly connected with mounting seat, the bottom of static ring gland is abutted with static ring and includes oil injection section that dynamic ring is set in the upper of static ring, oil injection section is provided with oil injection channel, oil injection section is installed with sealing plug above oil injection channel, one end of oil injection channel is communicated with the place where dynamic ring and static ring adhere.

[0007] The utility model is further provided as follows: still include first sealing ring between static ring gland and static ring and first bolt for fixing static ring gland and mounting seat, the static ring includes cooperation part and installation part, the cooperation part is located below dynamic ring and first sealing ring is set in the circumference of cooperation part and is abutted with installation part, and static ring gland is located above first sealing ring and is abutted with first sealing ring.

[0008] The utility model further sets up: the bottom of oil injection section is above the cooperation part, the oil injection channel is S type setting and is located the left and right sides of oil injection section respectively.

[0009] The utility model further sets up: the sealing plug is made of easy deformation material and includes contact section, cooperation section and inserting section from top to bottom, the diameter of cooperation section is less than inserting section, the installation groove for corresponding cooperation section is arranged on the top of each oil injection channel of oil injection section, the cooperation ring of cooperation section is arranged in each installation groove of oil injection section.

[0010] The utility model further sets up: still include the spring seat of sleeve setting pivot and the push ring of being located cooperation spring below, cooperation spring is located in spring seat, the push ring is located above the movable ring, and one end of cooperation spring is fixed with push ring, and the other end is fixed with spring seat.

[0011] The utility model further sets up: spring seat includes the cooperation sleeve of bottom, and the inner wall of cooperation sleeve is attached with push ring, movable ring's outer periphery.

[0012] The utility model further sets up: still include the fastening ring of being located spring seat above, the fastening ring is connected with pivot bolt, and the fastening ring is connected with spring seat through cylindrical pin.

[0013] The utility model further sets up: still include the first O type ring of being located between push ring and movable ring and the sleeve spring seat and the second O type ring of being located between spring seat and pivot.

[0014] Through adopting above-mentioned technical scheme, because the bottom of static ring gland is abutted with static ring, therefore the setting of static ring gland can provide convenience for the position determination of static ring in mounting seat, and because static ring gland includes oil injection section, and oil injection section is provided with oil injection channel, therefore after lubricating oil is filled into oil injection section, it can flow along oil injection channel and flow to the abutting surface of movable ring and static ring, thereby making the movable ring and static ring can be lubricated when working, and reducing the damage of sealing surface, in addition, because oil injection section is provided with sealing plug above oil injection channel, therefore when oil injection channel is not used, because of the existence of sealing plug, the dust and impurities in the outside cannot enter oil injection channel, and when lubricating oil is needed, the sealing plug is removed from oil injection section, thereby lubricating oil can be filled into oil injection channel. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0016] Figure 1 The cross-sectional view of the specific embodiment of the present application is shown in the figure.

[0017] Figure 2 The enlarged view of A in the figure is shown in the figure. Figure 1 The enlarged view of B in the figure is shown in the figure.

[0018] Figure 3 The enlarged view of C in the figure is shown in the figure. Figure 1 The enlarged view of D in the figure is shown in the figure.

[0019] Figure 4 The enlarged view of E in the figure is shown in the figure. Figure 1

[0020] Figure 5 Figure 1

[0021] Figure 6 Figure 1

[0022] In the figure: 1 - mounting seat, 2 - rotating shaft, 3 - static ring, 4 - dynamic ring, 5 - matching spring, 6 - static ring gland, 7 - oil injection section, 8 - oil injection channel, 9 - sealing plug, 10 - first sealing ring, 11 - first bolt, 12 - matching part, 13 - mounting part, 14 - contact section, 15 - matching section, 16 - insertion section, 17 - mounting groove, 18 - matching ring, 19 - spring seat, 20 - push ring, 21 - matching sleeve, 22 - fastening ring, 23 - first O-ring, 24 - second O-ring, 25 - bolt, 26 - cylindrical pin. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] As Figures 1-6 ​​​​​The utility model discloses a mechanical seal convenient to oil injection, including mounting seat 1, the rotating shaft 2 of rotating installation in mounting seat 1, static ring 3, with the dynamic ring 4 of fixed connection of rotating shaft 2 and cooperation spring 5, still including the static ring gland 6 of static ring 3 circumferential, static ring gland 6 and mounting seat 1 are fixedly connected through welding etc. mode, in the process of high -speed rotation of rotating shaft 2, dynamic ring 4 rotates along with it at this moment, and the pre -tightening force of cooperation spring 5 can make dynamic ring 4 and static ring 3 closely contact and form an effective sealing barrier to prevent the stirring material from rotating shaft 2 and equipment shell or the carrier of installing rotating shaft 2 and the leakage of the connecting place thereof, the bottom of static ring gland 6 and static ring 3 are in contact with and include the oil injection section 7 of the dynamic ring 4 of setting in static ring 3 top, be provided with oil injection channel 8 in oil injection section 7, the detachable installation of sealing plug 9 is installed in oil injection channel 8 top through buckling etc. mode of oil injection section 7, the projection of oil injection channel 8 upwards falls on sealing plug 9, and one end of oil injection channel 8 and dynamic ring 4, static ring 3 intercommunication at the place of sticking, and because the bottom of static ring gland 6 and static ring 3 are in contact with, therefore the setting of static ring gland 6 can provide the convenience for the position determination of static ring 3 in mounting seat 1 and can hold down static ring 3 and reduce the situation that static ring 3 position appears the movement when rotating shaft 2 high -speed rotation or movement appears vibration, and simultaneously because static ring gland 6 includes oil injection section 7, and oil injection channel 8 is set up on oil injection section 7, therefore after lubricating oil is filled into oil injection section 7, it can flow along oil injection channel 8 and can flow to the sticking surface of dynamic ring 4 and static ring 3 and make both work lubricated and reduce the damage of sealing surface to occur, in addition, because oil injection section 7 is located in oil injection channel 8 top and is equipped with sealing plug 9, therefore when not needing to use oil injection channel 8, dust impurities of outside cannot enter oil injection channel 8 due to the existence of sealing plug 9 at this time, and when needing to inject lubricating oil, by taking down sealing plug 9 from oil injection section 7, lubricating oil can be injected into oil injection channel 8.

[0025] The first sealing ring 10 is located between the static ring gland 6 and the static ring 3, and the first bolt 11 is used to fix the static ring gland 6 and the mounting base 1. The static ring 3 comprises a matching part 12 and a mounting part 13. The matching part 12 is located below the dynamic ring 4, and the first sealing ring 10 is sleeved around the matching part 12 and abuts against the mounting part 13. The static ring gland 6 is located above the first sealing ring 10 and abuts against the first sealing ring 10. Since the first bolt 11 is located between the static ring gland 6 and the mounting base 1, the static ring gland 6 can be fixed on the mounting base 1. Since the static ring gland 6 is sleeved around the matching part 12 of the static ring 3, the static ring gland 6 after being fixed can indirectly facilitate the position determination of the static ring 3 and the mounting base 1. Since the first sealing ring is located between the static ring gland 6 and the static ring 3, the first sealing ring 10 is located in the gap between the static ring 3 and the static ring gland 6 to prevent fluid from leaking from the assembly gap between the static ring 3 and the static ring gland 6. The first sealing ring 10 can provide a certain buffering effect to reduce the influence of vibration, thermal expansion and other factors on the sealing performance.

[0026] Preferably, the bottom of the oil injection section 7 is located above the matching part 12, and the oil injection channels 8 are S-shaped and located on the left and right sides of the oil injection section 7. The S-shaped oil injection channels 8 effectively increase the length of the oil injection channels 8, so that more lubricating oil can be filled in the oil injection channels 8 when filling lubricating oil into the oil injection channels 8, thereby providing convenience for filling more lubricating oil and being more efficient in operation.

[0027] The sealing plug 9 is made of rubber or other materials that can easily deform and comprises a contact section 14, a matching section 15 and an insertion section 16 from top to bottom. The diameter of the matching section 15 is smaller than that of the insertion section 16. The oil injection section 7 is provided with a mounting groove 17 for the corresponding matching section 15 above each oil injection channel 8. The oil injection section 7 is provided with a matching ring 18 sleeved around the matching section 15 in each mounting groove 17. Since the diameter of the matching section 15 is smaller than that of the insertion section 16, the matching section 15 needs to forcibly pass through the matching ring 18 when entering the mounting groove 17, so that the matching ring 18 can be sleeved around the matching section 15. At this time, the sealing plug 9 can be stably located above the oil injection channel 8 without external force to play a sealing role on the oil injection channel 8. When it is necessary to remove the sealing plug 9, an upward force is applied to the sealing plug 9 to make the matching section 15 upward and forcibly pass through the matching ring 18 to realize the removal of the sealing plug 9 and the injection of lubricating oil.

[0028] Further, the spring seat 19 sleeved with the rotating shaft 2 and the push ring 20 located below the matching spring 5 in the spring seat 19, the push ring 20 is located above the dynamic ring 4 and one end of the matching spring 5 is fixed with the push ring 20 and the other end is fixed with the spring seat 19, because the matching ring 18 is located above the push ring 20 and not between the dynamic ring 4 and the static ring 3, the direct friction or wear of the matching ring 18 to the sealing surface can be avoided, thereby helping to maintain the flatness and smoothness of the sealing surface, improving the sealing performance, and reducing the vibration and instability factors caused by the movement of the matching ring 18, making the sealing structure more stable, and compared with being located between the dynamic ring 4 and the static ring 3, the matching spring 5 is far away from the fluid.

[0029] The spring seat 19 includes a matching sleeve 21 at the bottom, the inner wall of the matching sleeve 21 is matched with the outer periphery of the push ring 20 and the dynamic ring 4, because after the spring seat 19 is sleeved with the rotating shaft 2 in the circumferential direction, the inner wall of the matching sleeve 21 is matched with the outer periphery of the push ring 20 and the dynamic ring 4 at this time, so that the radial positions of the push ring 20 and the dynamic ring 4 can be determined at the same time with the installation of the spring seat 19, and the push ring 20 and the dynamic ring 4 can be more stably located at the corresponding positions.

[0030] The fastening ring 22 located above the spring seat 19 is connected with the rotating shaft 2 by the bolt 25, and the fastening ring 22 is connected with the matching spring 59 of the spring seat 19 by the cylindrical pin 26, because the fastening ring 22 is located above the spring seat 19 and is connected by the cylindrical pin 26, so that the fastening ring 22 can be stably located above the spring seat 19, and because the fastening ring 22 is connected with the rotating shaft 2 by the bolt 25, the fastening ring 22 cannot move in the radial and axial directions, so that it is stably located above the spring seat 19, the positions of the two are determined, and because of the existence of the cylindrical pin 26, the spring seat 19 cannot rotate relative to the fastening ring 22, so that the fastening ring 22 stably holds the spring seat 19 and both cannot move and rotate.

[0031] Preferably, the first O-ring 23 located between the push ring 20 and the dynamic ring 4 and sleeved with the spring seat 19 and the second O-ring 24 located between the spring seat 19 and the rotating shaft 2 are further included, the first O-ring 23 and the second O-ring 24 can respectively play a sealing role between the push ring 20 and the dynamic ring 4 and between the rotating shaft 2 and the spring seat 19, thereby reducing the leakage of the fluid between the push ring 20 and the dynamic ring 4 and between the rotating shaft 2 and the spring seat 19.

[0032] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mechanical seal that facilitates oil filling, comprising a mounting base, a rotating shaft rotatably mounted on the mounting base, a stationary ring, a rotating ring fixedly connected to the rotating shaft, and a cooperating spring, characterized in that: It also includes a stationary ring cover located around the stationary ring. The stationary ring cover is fixedly connected to the mounting base. The bottom of the stationary ring cover abuts against the stationary ring and includes an oil injection section with a rotating ring sleeved on top of the stationary ring. An oil injection channel is provided in the oil injection section. A sealing plug is installed above the oil injection channel in the oil injection section. One end of the oil injection channel is connected to the contact point between the rotating ring and the stationary ring.

2. The mechanical seal for easy oil injection according to claim 1, characterized in that: It also includes a first sealing ring located between the stationary ring cover and the stationary ring, and a first bolt for fixing the stationary ring cover and the mounting base. The stationary ring includes a mating part and a mounting part. The mating part is located below the rotating ring, and the first sealing ring is sleeved around the mating part and abuts against the mounting part. The stationary ring cover is located above the first sealing ring and abuts against the first sealing ring.

3. The mechanical seal for easy oil injection according to claim 2, characterized in that: The bottom of the oil injection section is located above the mating part, and the oil injection channel is S-shaped and located on the left and right sides of the oil injection section respectively.

4. The mechanical seal for easy oil injection according to claim 3, characterized in that: The sealing plug is made of a material that is prone to deformation and includes, from top to bottom, a contact section, a mating section and an insertion section. The diameter of the mating section is smaller than that of the insertion section. The oil injection section is provided with an installation groove above each oil injection channel for the corresponding mating section to be inserted. Each installation groove of the oil injection section is provided with a mating ring for fitting the mating section.

5. The mechanical seal for easy oil injection according to claim 4, characterized in that: It also includes a spring seat with a rotating shaft and a push ring located below the cooperating spring. The cooperating spring is located inside the spring seat, and the push ring is located above the moving ring. One end of the cooperating spring is fixed to the push ring and the other end is fixed to the spring seat.

6. The mechanical seal for easy oil injection according to claim 4, characterized in that: The spring seat includes a mating sleeve at the bottom, the inner wall of which is in contact with the outer periphery of the push ring and the moving ring.

7. The mechanical seal for easy oil injection according to claim 5, characterized in that: It also includes a fastening ring located above the spring seat, the fastening ring being connected to the rotating shaft bolt, and the fastening ring being connected to the spring seat via a cylindrical pin.

8. The mechanical seal for easy oil injection according to claim 1, characterized in that: It also includes a first O-ring located between the push ring and the moving ring and fitted with a spring seat, and a second O-ring located between the spring seat and the rotating shaft.

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