阅读说明：本技术 一种机械式密封圈 (Mechanical sealing ring ) 是由 单坤林 于 2019-10-11 设计创作，主要内容包括：本发明公开了一种机械式密封圈,包括密封凸模座,和与密封凸模座套接配合的密封凹模座,密封凸模座与密封凹模座相互套接配合形成用于封装传动轴的密封空间,且传动轴的两侧分别延伸出密封凸模座外侧端部和密封凹模座外侧端部,传动轴的两侧与密封凸模座外侧端部和密封凹模座外侧端部分别采用间隙式密封配合连接；其中,密封空间外周套接有用于传动轴窜动位移的压缩复位弹簧,且压缩复位弹簧一端固设在密封凸模座外侧端部,其另一端固设在密封凹模座外侧端部；本发明通过对传动轴进行机械安装式的密封结构,同时又可以实时适应传动轴处于长时间高速旋转工况下轴向发生窜动时的密封要求,适合作为泵类传动轴的密封结构。(The invention discloses a mechanical seal ring, which comprises a seal convex die holder and a seal concave die holder in sleeve fit with the seal convex die holder, wherein the seal convex die holder and the seal concave die holder are in sleeve fit with each other to form a seal space for packaging a transmission shaft; wherein, the periphery of the sealed space is sleeved with a compression return spring for the movement displacement of the transmission shaft, one end of the compression return spring is fixedly arranged at the outer side end of the sealed male die holder, and the other end of the compression return spring is fixedly arranged at the outer side end of the sealed female die holder; the mechanical installation type sealing structure for the transmission shaft can meet the sealing requirement of the transmission shaft when the transmission shaft axially moves under the long-time high-speed rotation working condition in real time, and is suitable for being used as the sealing structure for the transmission shaft of pumps.)

1. A mechanical seal ring is characterized by comprising a seal convex die holder and a seal concave die holder in sleeve fit with the seal convex die holder, wherein the seal convex die holder and the seal concave die holder are in sleeve fit with each other to form a seal space for packaging a transmission shaft, the outer side end of the seal convex die holder and the outer side end of the seal concave die holder extend out of two sides of the transmission shaft respectively, and the two sides of the transmission shaft are in clearance seal fit connection with the outer side end of the seal convex die holder and the outer side end of the seal concave die holder respectively; and a compression reset spring used for the transmission shaft to move and displace is sleeved on the periphery of the sealed space, one end of the compression reset spring is fixedly arranged at the outer side end of the sealed male die holder, and the other end of the compression reset spring is fixedly arranged at the outer side end of the sealed female die holder.

2. The mechanical seal ring according to claim 1, wherein the inner periphery of the seal cavity base is provided with a plurality of spaced apart main retaining teeth, the outer periphery of the seal cavity base is provided with a plurality of spaced apart main retaining grooves, and each main retaining tooth is in one-to-one corresponding retaining engagement with each main retaining groove.

3. The mechanical seal ring according to claim 2, wherein the inner side end of the seal female die holder is further provided with a plurality of spaced secondary limit teeth, the outer periphery of the seal male die holder is provided with a plurality of spaced secondary limit grooves, and each secondary limit tooth is in one-to-one corresponding limit fit connection with each secondary limit groove.

4. The mechanical seal ring according to claim 1, wherein the outer end face of the outer end of the seal boss base is formed by a plurality of first wear-resistant concentric groove rings distributed at intervals; the outer end face of the outer side end of the sealed concave die holder is provided with a plurality of second wear-resistant concentric groove rings which are distributed at intervals.

5. The mechanical seal according to claim 1, wherein the transmission shaft is made of stainless steel, and the sealing male die holder and the sealing female die holder are made of brass respectively.

6. The mechanical seal ring according to claim 1, wherein the transmission shaft is a water pump or oil pump transmission shaft, and the transmission shaft is connected with the motor through a coupling, and is used for receiving power input from an external motor and inputting the power to an impeller installed in an inner cavity of the pump, so that water or oil is conveyed through the impeller.

Technical Field

The invention belongs to a sealing technology, and particularly relates to a mechanical sealing ring.

Background

Various types of sealing structures are used in transmission structures than is indispensable, and among them, a rubber seal ring is a typical sealing structure. And to in water pump or the oil pump, its transmission shaft can be in long-time high-speed rotatory, and the sealing washer takes place deformation easily, can produce the drunkenness in the course of the work simultaneously in the axiality direction, adopts the unable good sealing requirement that satisfies of the traditional sealing washer structure of bell and spigot joint formula at its both ends.

The utility model discloses a grant utility model patent that bulletin number is CN208619654U discloses a sealing washer for petroleum machinery, including the sealing washer body, the chisel has the cavity in sealing washer body inner, interior welt has been placed to cavity inner, interior welt inner chisel has perpendicular through-hole, the inner wall of erecting the through-hole is opened and is chisel and has many pairs of horizontal through-hole, every contained angle between every pair of horizontal through-hole is the same, every pair all is equipped with two elastic steel sheets between the horizontal through-hole, elastic steel sheet is close to the left push pedal of one end fixedly connected with in the interior welt outside, elastic steel sheet is close to the inboard one end of interior welt and is passed perpendicular through-hole and two horizontal through-hole connections have the right push pedal, be equipped with the telescopic link between two elastic steel sheets, the inner fixedly connected with compression spring of telescopic link, compression. Although this technical scheme solves traditional rubber seal and easily takes place deformation and lead to the problem of oil leak, but mounting structure is comparatively complicated, can't be applied to the seal installation of conveying axle moreover.

The applicant therefore wishes to seek new sealing solutions to solve the above technical problems.

Disclosure of Invention

In view of the above, the present invention provides a mechanical seal ring, which can adapt to the sealing requirement when the transmission shaft axially moves under the long-time high-speed rotation condition in real time by using a mechanical installation type seal structure for the transmission shaft, and is suitable for being used as a seal structure for a transmission shaft of a pump.

The technical scheme adopted by the invention is as follows:

a mechanical seal ring comprises a seal convex die holder and a seal concave die holder in sleeve fit with the seal convex die holder, wherein the seal convex die holder and the seal concave die holder are in sleeve fit with each other to form a seal space for packaging a transmission shaft, the outer side end of the seal convex die holder and the outer side end of the seal concave die holder extend out of two sides of the transmission shaft respectively, and two sides of the transmission shaft are in clearance seal fit connection with the outer side end of the seal convex die holder and the outer side end of the seal concave die holder respectively; and a compression reset spring used for the transmission shaft to move and displace is sleeved on the periphery of the sealed space, one end of the compression reset spring is fixedly arranged at the outer side end of the sealed male die holder, and the other end of the compression reset spring is fixedly arranged at the outer side end of the sealed female die holder.

Preferably, the inner periphery of the sealing female die holder is provided with a plurality of main limiting teeth which are uniformly distributed at intervals, the outer periphery of the sealing male die holder is provided with a plurality of main limiting grooves which are uniformly distributed at intervals, and each main limiting tooth is in one-to-one corresponding limiting fit connection with each main limiting groove.

Preferably, the end part of the inner side of the sealing female die holder is further provided with a plurality of auxiliary limiting teeth which are uniformly distributed at intervals, the periphery of the sealing male die holder is provided with a plurality of auxiliary limiting grooves which are uniformly distributed at intervals, and each auxiliary limiting tooth is in one-to-one corresponding limiting fit connection with each auxiliary limiting groove.

Preferably, the outer end face of the outer side end of the sealing convex die seat adopts a plurality of first wear-resistant concentric groove rings which are distributed at intervals; the outer end face of the outer side end of the sealing concave die holder is provided with a plurality of second wear-resistant concentric groove rings distributed at intervals, and the first wear-resistant concentric groove rings and the second wear-resistant concentric groove rings are structurally arranged, so that the problem of abrasion caused by contact between a transmission shaft and the outside due to the fact that the transmission shaft moves in the axial direction in a long-time running environment can be solved.

Preferably, the conveying shaft is made of stainless steel, the sealing male die holder and the sealing female die holder are respectively made of brass, and the problem of abrasion caused by the cooperation of homogeneous materials is solved.

Preferably, the transmission shaft is a water pump or an oil pump transmission shaft, and the transmission shaft is connected with the motor through a coupler and used for receiving power input by an external motor, inputting the power to an impeller arranged in an inner cavity of the pump, and conveying water or oil through the impeller.

The sealing space for packaging the transmission shaft is formed by the sealing convex die holder and the sealing concave die holder which are installed in a sealing sleeve-matched mode, abrasion and deformation are not prone to occurring, the service life is long, meanwhile, the compression reset spring is sleeved between the two ends of the sealing convex die holder and the two ends of the sealing concave die holder, the sealing requirement of the transmission shaft when the transmission shaft axially moves under the long-time high-speed rotating working condition can be met in real time, and the sealing structure is particularly suitable for being used as a sealing structure of the transmission shaft of pumps; the invention further ensures the stable sleeving effect between the sealing male die holder and the sealing female die holder through the structure of matching the main limiting tooth grooves and the auxiliary limiting tooth grooves, and effectively avoids radial sliding.

Drawings

FIG. 1 is a schematic structural diagram of a mechanical seal ring according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a schematic diagram of the exploded structure of FIG. 1;

fig. 4 is a cross-sectional view of fig. 1.

Detailed Description

The embodiment of the invention discloses a mechanical sealing ring, which comprises a sealing convex die holder and a sealing concave die holder in sleeve fit with a lower sealing concave die holder, wherein the sealing convex die holder and the sealing concave die holder are in sleeve fit with each other to form a sealing space for packaging a transmission shaft; and one end of the compression reset spring is fixedly arranged at the outer side end of the sealing male die holder, and the other end of the compression reset spring is fixedly arranged at the outer side end of the sealing female die holder.

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, 2, 3 and 4, a mechanical seal ring 100 includes a sealing male mold base 110 and a sealing female mold base 120 in sleeve fit with the sealing male mold base 110, the sealing male mold base 120 and the sealing female mold base 120 are in sleeve fit with each other to form a sealing space 130 for enclosing a transmission shaft (not shown), and two sides of the transmission shaft respectively extend out of an outer end 111 of the sealing male mold base and an outer end 121 of the sealing female mold base, and two sides of the transmission shaft are in clearance type sealing fit with the outer end 111 of the sealing male mold base and the outer end 121 of the sealing female mold base respectively, preferably, in the present embodiment, the transmission shaft is a water pump transmission shaft, the transmission shaft is connected with a motor through a coupler and is used for receiving power input from an external motor, and simultaneously inputs the power to an impeller installed in an inner cavity of the pump, and realizes water or oil delivery through the impeller, the specific structural arrangement of the water pump applied in the embodiment can adopt the prior art, which belongs to the common general knowledge of the technicians in the field, the invention is not specifically explained, and in other embodiments, the transmission shaft can also be an oil pump transmission shaft; further preferably, in this embodiment, the transmission shaft is made of stainless steel, and the sealing male die holder 110 and the sealing female die holder 120 are made of brass respectively, so as to avoid the wear problem caused by the intermittent sealing and matching connection between the transmission shaft of the water pump and the mechanical seal ring 100 which are made of the same material;

wherein, the periphery of the sealed space 130 is sleeved with a compression return spring 140 for the transmission shaft to shift, and one end of the compression return spring 140 is fixedly arranged at the outer side end 111 of the sealed male die holder, and the other end is fixedly arranged at the outer side end 121 of the sealed female die holder;

preferably, in order to prevent the mechanical seal ring 100 from sliding radially during operation, in this embodiment, a plurality of main limiting teeth 122 are uniformly spaced and arranged on the inner periphery of the sealing female die holder 120, a plurality of main limiting grooves 112 are uniformly spaced and arranged on the outer periphery of the sealing male die holder 110, and each main limiting tooth 122 is connected with each main limiting groove 112 in a one-to-one corresponding limiting and matching manner; meanwhile, the end part of the inner side of the sealing female die holder 120 is also provided with a plurality of auxiliary limiting teeth 123 which are uniformly distributed at intervals, the periphery of the sealing male die holder 110 is provided with a plurality of auxiliary limiting grooves 113 which are uniformly distributed at intervals, and each auxiliary limiting tooth 123 is in one-to-one corresponding limiting fit connection with each auxiliary limiting groove 113;

preferably, in the present embodiment, the outer end surface 111a of the outer end 111 of the sealing die holder is formed by a plurality of first wear-resistant concentric groove rings 111b distributed at intervals; the outer end face 121a of the outer end 121 of the sealing die holder adopts a plurality of second wear-resistant concentric groove rings 121b distributed at intervals, and the first wear-resistant concentric groove ring 111b and the second wear-resistant concentric groove ring 121b are structurally arranged, so that the problem of abrasion caused by contact with the outside due to the fact that the transmission shaft moves in the axial direction in the mechanical sealing ring 100 can be avoided in a long-time operating environment.

In the embodiment, the sealing space 130 for packaging the transmission shaft is formed by the sealing male die holder 110 and the sealing female die holder 120 which are installed in a sealing sleeve-fit manner, so that the transmission shaft is not easy to wear and deform, the service life is long, meanwhile, the compression return spring 140 is sleeved between the two ends of the sealing male die holder 110 and the sealing female die holder 120, the structure of the compression return spring 140 can meet the sealing requirement when the transmission shaft axially moves under the long-time high-speed rotating working condition in real time, multiple tests and tests of the embodiment verify that the compression return spring 140 can effectively avoid the risk of sealing failure caused by the fact that the sealing male die holder 110 and the sealing female die holder 120 cannot adapt to the movement in real time when the transmission shaft axially moves, specifically, when the transmission shaft moves, the compression return spring 140 receives an acting force from the same direction as the moving direction of the transmission shaft, the positions of the sealing male die holder 110 and the sealing female die holder 120 can be adjusted in real time, so that the sealing male die holder and the sealing female die holder can be adjusted to be suitable for fine adjustment of a transmission shaft in a proper range, and meanwhile, overlarge displacement caused by inertia force of the mechanical sealing ring 100 can be avoided, so that the sealing ring is particularly suitable for being used as a sealing structure of a pump transmission shaft; the present embodiment further uses the structure of the main limiting tooth socket and the auxiliary limiting tooth socket to ensure the stable sleeving effect between the sealing male mold base 110 and the sealing female mold base 120, and effectively prevents the radial sliding.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.