CN213744114U

CN213744114U - Dynamic seal lubricating device

Info

Publication number: CN213744114U
Application number: CN202022785288.1U
Authority: CN
Inventors: 陈金强; 崔庆强; 于旭年; 冯岭帅; 杨东升; 张斌
Original assignee: Shandong Yanshan Pumps Co ltd
Current assignee: Shandong Yanshan Pumps Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-07-20
Anticipated expiration: 2030-11-26

Abstract

A dynamic seal lubricating device belongs to the technical field of mechanical seal. The method is characterized in that: the bottom of the mechanical seal sheath (5) is communicated with the lubricating chamber (3), an oil return channel is arranged between the top of the mechanical seal sheath (5) and the top of the lubricating chamber (3), and an oil blocking device is arranged between the mechanical seal sheath (5) and the mechanical seal (4). This dynamic seal lubricating arrangement's machine seals the bottom of sheath and is linked together with lubricated room, is provided with oil return channel between top and the lubricated room, makes in lubricating oil can enter into the machine seals the sheath, avoids leading to lubricating oil to keep away from mechanical seal because the high-speed rotation of pump shaft, keeps off oily device and can block the lubricating oil in the machine seals the sheath, guarantees lubricating oil and mechanical seal fully contact to carry out fully lubricated to mechanical seal, improved mechanical seal's life.

Description

Dynamic seal lubricating device

Technical Field

A dynamic seal lubricating device belongs to the technical field of mechanical seal.

Background

A mechanical seal is typically provided between the pump shaft and the pump casing of a vertical pump to prevent water from entering the motor. The pump shell is provided with a lubricating chamber for lubricating the mechanical seal, lubricating oil is filled in the lubricating chamber, and the mechanical seal is lubricated by the lubricating oil, so that the service life of the mechanical seal is prolonged. In order to avoid insufficient lubricating oil around the mechanical seal when the pump shaft rotates at a high speed, a mechanical seal jacket is usually arranged outside the mechanical seal, but in the rotating process of the pump shaft, the lubricating oil can be attached to the inner wall of the mechanical seal jacket under the action of centrifugal force, so that the lubrication of the mechanical seal is insufficient, and the service life of the mechanical seal is influenced.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the dynamic seal lubricating device overcomes the defects of the prior art, and can block lubricating oil in the mechanical seal jacket to fully lubricate the mechanical seal.

The utility model provides a technical scheme that its technical problem adopted is: this dynamic seal lubricating arrangement, including setting up the mechanical seal between the pump body and pump shaft and encircle the lubrication chamber that mechanical seal set up, its characterized in that: the mechanical seal device is characterized by further comprising a mechanical seal sheath sleeved outside the mechanical seal, the bottom of the mechanical seal sheath is communicated with the lubricating chamber, an oil return channel is arranged between the top of the mechanical seal sheath and the top of the lubricating chamber, and an oil blocking device is arranged between the mechanical seal sheath and the mechanical seal.

Preferably, the oil blocking device and the mechanical seal are arranged in a rotating mode.

Preferably, the oil blocking device comprises a spring sleeved outside the mechanical seal, and the spring is arranged in the mechanical seal sheath. The oil blocking device is a spring, the spring can not only be used for blocking lubricating oil to fully lubricate the mechanical seal, but also be used for enabling the lubricating oil to flow upwards in the process of relative rotation with the lubricating oil to fully lubricate the whole mechanical seal, and the service life of the mechanical seal is greatly prolonged.

Preferably, the bottom of the mechanical seal sheath is arranged at an interval with the inner wall of the lubricating chamber, so that the mechanical seal sheath is communicated with the lubricating chamber.

Preferably, the top of the machine seal jacket is provided with an oil return groove, and the oil return groove and the pump body surround to form an oil return channel.

Preferably, the oil return channel is provided with a plurality of oil return channels which are arranged around the mechanical seal jacket at intervals. The oil return channel is provided with a plurality of oil return channels, so that the lubricating oil can smoothly and quickly flow back into the lubricating chamber, the lubricating oil in the mechanical seal jacket can be quickly circulated, the heat generated by the mechanical seal can be timely taken away, and the cooling effect on the mechanical seal is good.

Preferably, an outer flanging is arranged around the upper end of the machine seal sheath and detachably connected with the pump body. The outward flanging facilitates the connection of the mechanical seal sheath and the pump body.

Preferably, the machine seal sheath is provided with an oil outlet in the middle, and the oil outlet communicates the lubrication chamber with the inner cavity of the machine seal sheath.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

this dynamic seal lubricating arrangement's machine seals the bottom of sheath and is linked together with lubricated room, is provided with oil return channel between top and the lubricated room, makes in lubricating oil can enter into the machine seals the sheath, avoids leading to lubricating oil to keep away from mechanical seal because the high-speed rotation of pump shaft, keeps off oily device and can block the lubricating oil in the machine seals the sheath, guarantees lubricating oil and mechanical seal fully contact to carry out fully lubricated to mechanical seal, improved mechanical seal's life.

Drawings

FIG. 1 is a front cross-sectional schematic view of a vertical pump.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

In the figure: 1. the pump body 2, the pump shaft 3, the lubrication chamber 4, the mechanical seal 5, the mechanical seal jacket 501, the oil outlet 502 and the oil return groove.

Detailed Description

Fig. 1 to 2 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 2.

The utility model provides a dynamic seal lubricating arrangement, is including setting up mechanical seal 4 between the pump body 1 and pump shaft 2 and encircleing the lubrication chamber 3 that mechanical seal 4 set up, still including the cover establish mechanical seal sheath 5 outside mechanical seal 4, the bottom and the lubrication chamber 3 of mechanical seal sheath 5 are linked together, are provided with oil return channel between the top of mechanical seal sheath 5 and the top of lubrication chamber 3, are provided with between mechanical seal sheath 5 and the mechanical seal 4 and keep off oily device. This dynamic seal lubricating arrangement's machine seals sheath 5's bottom and lubrication chamber 3 and is linked together, be provided with oil return channel between top and the lubrication chamber 3, make lubricating oil can enter into machine and seal sheath 5 in, avoid leading to lubricating oil to keep away from mechanical seal 4 because the high-speed rotation of pump shaft 2, keep off oily device and can block the lubricating oil in the machine seals sheath 5, guarantee lubricating oil and 4 abundant contacts of mechanical seal, and carry out abundant lubrication to mechanical seal 4, mechanical seal 4's life has been improved.

The present invention is further described with reference to specific embodiments, however, it will be understood by those skilled in the art that the detailed description given herein with respect to the drawings is for better explanation and that the present invention is necessarily to be construed as limited to those embodiments, and equivalents or common means thereof will not be described in detail but will fall within the scope of the present application.

Specifically, the method comprises the following steps: as shown in FIGS. 1-2: the lubrication chamber 3 is arranged on the pump body 1, the lubrication chamber 3 is arranged around the mechanical seal 4, and the mechanical seal 4 is arranged between the pump body 1 and the pump shaft 2 and seals the pump body 1 and the pump shaft 2.

The mechanical seal jacket 5 is coaxially sleeved outside the mechanical seal 4, the mechanical seal jacket 5 is cylindrical, an outward flanging is arranged at the upper end of the mechanical seal jacket 5 in a surrounding mode, and the flanging is detachably connected with the pump body 1 through a bolt, so that the mechanical seal jacket 5 is convenient to install. The inner wall of the mechanical seal jacket 5 is arranged at a distance from the outer wall of the mechanical seal 4.

The lower end of the mechanical seal sheath 5 and the inner wall of the lubricating chamber 3 are arranged at intervals, so that the bottom of the mechanical seal sheath 5 is communicated with the lubricating chamber 3, and lubricating oil enters the mechanical seal sheath 5 through the bottom of the mechanical seal sheath 5. The top of the mechanical seal jacket 5 is provided with an oil return groove 502, the top of the mechanical seal jacket 5 is connected with the pump body 1, so that the oil return groove 502 and the pump body 1 enclose an oil return channel, and the oil return channel connects the inner cavity of the mechanical seal jacket 5 with the top of the lubricating chamber 3. The oil return grooves 502 are arranged along the radial direction of the mechanical seal jacket 5, and a plurality of oil return channels are uniformly distributed at intervals around the axis of the mechanical seal jacket 5, so that the lubricating oil in the mechanical seal jacket 5 quickly flows back to the lubricating chamber 3.

The oil outlet 501 is formed in the middle of the mechanical seal sheath 5, and the oil outlet 501 communicates the inner cavity of the mechanical seal sheath 5 with the lubricating chamber 3, so that excessive lubricating oil in the mechanical seal sheath 5 is avoided. The oil outlet holes 501 are uniformly distributed at intervals around the axis of the mechanical seal sheath 5.

The oil blocking device is arranged between the mechanical seal jacket 5 and the mechanical seal 4, the oil blocking device is arranged around the mechanical seal 4, and the oil blocking device and the mechanical seal 4 are arranged in a relative rotation mode. In this embodiment, the oil blocking device is a spring (not shown in the figure), and the spring is arranged around the mechanical seal 4, so that the spring can block the lubricating oil and can also convey the lubricating oil upwards in the process of relative rotation of the lubricating oil and the spring. The oil barrier may also be a helical barrier arranged around the mechanical seal 4.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a dynamic seal lubricating arrangement, is including setting up mechanical seal (4) between the pump body (1) and pump shaft (2) and encircle lubrication chamber (3) that mechanical seal (4) set up, its characterized in that: still establish mechanical seal sheath (5) outside mechanical seal (4) including the cover, the bottom and the lubrication chamber (3) of mechanical seal sheath (5) are linked together, are provided with oil return passage between the top of mechanical seal sheath (5) and the top of lubrication chamber (3), be provided with between mechanical seal sheath (5) and mechanical seal (4) and keep off oily device.

2. The dynamic seal lubrication device according to claim 1, wherein: the oil blocking device and the mechanical seal (4) are arranged in a relative rotating mode.

3. The dynamic seal lubrication device according to claim 1 or 2, wherein: the oil blocking device comprises a spring sleeved outside the mechanical seal (4), and the spring is arranged in the mechanical seal sheath (5).

4. The dynamic seal lubrication device according to claim 1, wherein: the bottom of the machine seal jacket (5) is arranged at intervals with the inner wall of the lubricating chamber (3), so that the machine seal jacket (5) is communicated with the lubricating chamber (3).

5. The dynamic seal lubrication device according to claim 1, wherein: the top of the machine seal jacket (5) is provided with an oil return groove (502), and the oil return groove (502) and the pump body (1) surround to form an oil return channel.

6. The dynamic seal lubrication device according to claim 1 or 5, wherein: the oil return channel is provided with a plurality of oil return channels which are arranged around the mechanical seal jacket (5) at intervals.

7. The dynamic seal lubrication device according to claim 1, 4 or 5, wherein: the upper end of the machine seal sheath (5) is surrounded by a flanging which is detachably connected with the pump body.

8. The dynamic seal lubrication device according to claim 1, wherein: the machine seal protection sleeve (5) is provided with an oil outlet (501) in the middle, and the oil outlet (501) communicates the lubricating chamber (3) with the inner cavity of the machine seal protection sleeve (5).