CN220870078U - Rotary shaft structure sealing device and engine - Google Patents

Abstract

The utility model relates to the technical field of engines, and discloses a rotating shaft structure sealing device and an engine, wherein the rotating shaft structure sealing device comprises: the baffle is suitable for being fixedly arranged between the first transmission part and the second transmission part, the sealing body is arranged on one side, close to the baffle, of the sealing body to form a sealing lip, and the sealing lip of the sealing body is in butt fit with the baffle.

Description

Rotary shaft structure sealing device and engine

Technical Field

The utility model relates to the technical field of engines, in particular to a rotating shaft structure sealing device and an engine.

Background

With the development of the technology of engines, especially high-speed internal combustion engines, the requirements of maintenance mileage of the engines are gradually increasing. The oil seal of the crankshaft is used as a part which is frequently worn in the engine, and when the engine continuously works to reach the mileage requiring maintenance, the oil seal in the oil seal is frequently required to be replaced to ensure the sealing at the crankshaft.

At present, the oil blanket of current bent axle is box-type oil blanket usually, it includes inner skeleton and exoskeleton two parts, the inner skeleton includes that the cross-section is the axial section and the radial section of L shape, wherein radial section and crank gear's terminal surface cooperation, axial section and crank pulley's outer peripheral face cooperation, the outer skeleton respectively with axial section, radial section and the inner wall cooperation in the bent axle hole on the gear chamber lid, in order to guarantee the reliable cooperation of inner skeleton and outer skeleton, box-type oil blanket needs higher installation accuracy, the terminal surface of inner skeleton axial section needs to be flush with the terminal surface of outer skeleton, but when later maintenance, the operating personnel changes box-type oil blanket and need manual the assembly, hardly reach required installation accuracy and then make the installation time and energy consuming when the installation.

Disclosure of utility model

In view of this, the present utility model provides an engine to solve the problem that the oil seal of the existing crankshaft is difficult to install.

In a first aspect, the present utility model provides a sealing device for a rotating shaft structure, for sealing an annular ring of the rotating shaft structure, the rotating shaft structure including a main shaft, a first transmission member, a second transmission member and an end housing, the first transmission member and the second transmission member being adapted to be sleeved on the main shaft, the end housing and the second transmission member forming an annular ring therebetween, the sealing device comprising: the baffle extends along the radial direction of main shaft and is suitable for the cover to establish on the main shaft, and the baffle is suitable for fixed setting between first driving medium and second driving medium, and shutoff main part is suitable for setting up in the annular ring, and one side that the shutoff main part is close to the baffle forms the seal lip, and the inboard and the first driving medium cooperation of shutoff main part, the outside and the end shell cooperation of shutoff main part, the seal lip and the baffle butt cooperation of shutoff main part.

The beneficial effects are that: the baffle is arranged on one side of the plugging main body, the plugging main body is directly matched with the first transmission piece and the end shell, and meanwhile, the plugging main body is matched with the baffle only through the sealing lip, during installation, the assembly can be completed only by installing the plugging main body to a preset position and abutting the baffle after the baffle is fixed, the relative positions of the inner skeleton end face and the outer skeleton end face are not required to be considered when low-friction axial sealing is realized, the sealing effect is ensured, meanwhile, the difficulty of an operator in manually installing the rotating shaft structure sealing device is reduced, and the problem that an oil seal of an existing crankshaft is difficult to install is effectively solved.

In an alternative embodiment, the blocking body has elasticity and is in interference fit with the first transmission piece and the end housing, respectively.

The beneficial effects are that: because the plugging main body has elasticity, when in interference fit, the plugging main body can be in closer abutting connection with the first transmission piece and the end shell,

In an alternative embodiment, the occluding body comprises a scaffold and an elastic layer surrounding the outside of the scaffold.

The beneficial effects are that: simple structure and convenient manufacture.

In an alternative embodiment, the plugging body comprises a bearing section and a mating section, the mating section is connected with an end of the bearing section remote from the main shaft, the mating section is adapted to mate with the end shell, and a sealing lip is formed on a side of the bearing section close to the baffle.

The beneficial effects are that: the whole structure is simple and is convenient to process and manufacture.

In an alternative embodiment, the plugging body further comprises a positioning section connected to the end of the mating section remote from the baffle, the positioning section extending in a direction away from the main axis, the positioning section being adapted to mate with an end face of the end housing.

The beneficial effects are that: because of the existence of the positioning section, when the plugging main body is pushed in during installation, the plugging main body is installed in place only by matching and tightly attaching the positioning section with the end face of the end shell, and the installation process of the plugging main body is greatly simplified.

In an alternative embodiment, the blocking body further comprises a dust lip connected to a side of the carrier section remote from the baffle plate, the carrier section being adapted to cooperate with the first transmission member via the dust lip.

The beneficial effects are that: the dustproof lip is an elastic body with flexibility, and can be continuously contacted with the first transmission piece when the first transmission piece vibrates or the pressure of sealing fluid changes, so that a stable sealing state is maintained.

In an alternative embodiment, the occluding body further comprises a secondary lip, the bearing segment forming the secondary lip proximate an end of the first transmission member.

The beneficial effects are that: the side of the auxiliary lip, which is close to the sealing lip, can form an oil storage tank, and when leakage occurs at the sealing lip, the leaked liquid can be temporarily blocked, so that the leakage quantity is reduced.

In an alternative embodiment, the baffle comprises an abutment section, a sealing section and a connecting section connecting the abutment section and the sealing section, the abutment section is arranged close to the main shaft, the abutment section is suitable for being in abutment fit with the second transmission member through the first transmission member, the sealing section is arranged close to the plugging main body compared with the abutment section, and the sealing section is in abutment fit with the sealing lip.

The beneficial effects are that: the smaller spacing between the sealing section and the sealing lip enables the sealing lip to be more reliably abutted against the sealing section.

In an alternative embodiment, the wall of the sealing section is provided with a return line.

The beneficial effects are that: the return flow lines act like a screw pump and can "pump" the fluid leaking to the air side back to the liquid side, which results in a much higher return rate than a conventional oil seal.

In a second aspect, the present utility model also provides an engine comprising: the sealing device of the rotating shaft structure.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a seal assembly for a rotary shaft structure according to an embodiment of the present utility model;

FIG. 2 is an assembled schematic view of the shaft structure seal shown in FIG. 1;

FIG. 3 is a schematic view of a backflow ridge on a baffle of the shaft seal shown in FIG. 1.

Reference numerals illustrate:

1. A baffle; 101. an abutment section; 102. a connection section; 103. a sealing section; 2. a plugging main body; 201. a sealing lip; 202. a skeleton; 203. an elastic layer; 204. a load-bearing section; 205. a mating section; 206. a positioning section; 207. a dust lip; 208. a secondary lip; 3. a main shaft; 4. a first transmission member; 5. a second transmission member; 6. an end shell.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiments of the present utility model are described below with reference to fig. 1 to 3.

According to an embodiment of the present utility model, in one aspect, there is provided a rotary shaft structure sealing device for sealing an annular ring of a rotary shaft structure, the rotary shaft structure including a main shaft 3, a first transmission member 4, a second transmission member 5, and an end housing 6, the first transmission member 4 and the second transmission member 5 being adapted to be sleeved on the main shaft 3, the end housing 6 and the second transmission member 5 forming an annular ring therebetween, the sealing device comprising: baffle 1 and shutoff main part 2, the radial extension along main shaft 3 of baffle 1 just is suitable for the cover to establish on main shaft 3, and baffle 1 is suitable for fixed the setting between first driving medium 4 and second driving medium 5, and shutoff main part 2 is suitable for setting up in the annular ring, and one side that shutoff main part 2 is close to baffle 1 forms seal lip 201, and the inboard and the first driving medium 4 cooperation of shutoff main part 2, the outside and the end shell 6 cooperation of shutoff main part 2, seal lip 201 and baffle 1 butt cooperation of shutoff main part 2.

By using the rotating shaft structure sealing device of the embodiment, the baffle 1 is arranged on one side of the plugging main body 2, the plugging main body 2 is directly matched with the first transmission piece 4 and the end shell 6, and meanwhile, the sealing lip 201 is matched with the baffle 1, during installation, the baffle 1 is fixed, the plugging main body 2 is only required to be installed to a preset position and is abutted against the baffle 1 to complete assembly, the low-friction axial sealing is realized, the relative positions of the end face of the inner skeleton and the end face of the outer skeleton are not required to be considered, the sealing effect is ensured, meanwhile, the difficulty of an operator in manually installing the rotating shaft structure sealing device is reduced, and the problem that an oil seal of an existing crankshaft is difficult to install is effectively solved.

Specifically, in order to ensure reliable cooperation with the baffle 1 of the plugging main body 2, it is necessary to ensure a distance between the end face of the plugging main body 2, which is far away from the baffle 1, and the baffle 1, after the fixing of the baffle 1 is completed, the plugging main body 2 is continuously pressed in close to the baffle 1 until the plugging main body 2 reaches a predetermined position, and then the installation of the rotating shaft structure sealing device can be judged to be completed.

Meanwhile, it should be noted that the sealing device with the rotating shaft structure in this embodiment is not an integral oil seal any more, but is split, the plugging main body 2 and the baffle 1 are independent, and during manufacturing, the plugging main body 2 and the baffle 1 can be manufactured separately, so that the complexity of the whole structure can be effectively reduced, the manufacturing difficulty is reduced, and during mounting, the plugging main body 2 and the baffle 1 can be performed independently and sequentially, so that the mounting of operators is also facilitated.

Further, in the conventional engine, taking the front end of the crankshaft as an example, the crankshaft oil seal is usually assembled in an annular space formed by the gear chamber, the crank pulley and the crank gear together, the axial dimension of the cross section of the annular space is generally larger than the radial dimension, and the axial dimension of the cross section of the conventional oil seal is generally similar to the radial dimension, so that the cross section dimension of the annular space is not matched and is difficult to assemble when the conventional oil seal is used.

In the rotating shaft structure sealing device of the embodiment, the original oil seal inner framework is replaced by the baffle plate 1, so that the plugging main body 2 is not required to be in contact with the first transmission member 4 through the baffle plate 1, and the plugging main body 2 is directly in contact with the first transmission member 4 at the moment, therefore, the radial dimension of the section of the rotating shaft structure sealing device becomes smaller, and the sealing device can be matched with the annular space at the front end of the engine crankshaft better.

In this embodiment, the plugging main body 2 has elasticity and is in interference fit with the first transmission member 4 and the end shell 6 respectively, and because the plugging main body 2 has elasticity, when in interference fit, the plugging main body 2 can be in closer butt joint with the first transmission member 4 and the end shell 6, and then the sealing performance between the plugging main body 2 and the first transmission member 4 and the end shell 6 can be ensured.

In this embodiment, the plugging body 2 includes a skeleton 202 and an elastic layer 203 wrapping the outside of the skeleton 202, and has a simple structure and is convenient to manufacture.

Specifically, the material of the skeleton 202 and the material of the elastic layer 203 are not limited, and the skeleton 202 needs to have sufficient rigidity and hardness, and meanwhile needs to have a certain bending capability, and may be a metal material, and the elastic layer 203 is a rubber material and may be fixed on the skeleton 202 through a vulcanization process.

Preferably, the elastic layer 203 is fluororubber.

In this embodiment, the plugging main body 2 includes a bearing section 204 and a matching section 205, the matching section 205 is connected with one end of the bearing section 204 far away from the main shaft 3, the matching section 205 is suitable for matching with the end shell 6, and a sealing lip 201 is formed on one side of the bearing section 204 near to the baffle 1, so that the whole structure is simple and convenient to process and manufacture.

Specifically, as shown in fig. 1, the sealing lip 201 of the plugging body 2 is in a stretched and unmated state at this time, and when assembled as shown in fig. 2, since the plugging body 2 is closer to the baffle 1, the sealing lip 201 abuts against the baffle 1 and presses to form the shape shown in fig. 2, and thus a seal can be formed.

In this embodiment, the plugging main body 2 further includes a positioning section 206, the positioning section 206 is connected with one end of the matching section 205 away from the baffle 1, the positioning section 206 extends towards the direction away from the spindle 3, the positioning section 206 is suitable for matching with the end face of the end shell 6, as shown in fig. 2, due to the existence of the positioning section 206, when the plugging main body 2 is pushed in during installation, only the positioning section 206 is required to be matched with and tightly attached to the end face of the end shell 6, and at this time, the plugging main body 2 is installed in place, so that the installation process of the plugging main body 2 is greatly simplified.

Specifically, in the process of manufacturing the positioning section 206, the skeleton 202 of the plugging main body 2 is bent to form the shape of the positioning section 206, and then the elastic layer 203 is vulcanized onto the skeleton 202.

In this embodiment, the plugging main body 2 further includes a dust lip 207, where the dust lip 207 is connected to a side of the carrying section 204 away from the baffle 1, and the carrying section 204 is adapted to cooperate with the first transmission member 4 through the dust lip 207, and the dust lip 207 is an elastomer with flexibility, and can be continuously contacted with the first transmission member 4 when the first transmission member 4 vibrates or when the pressure of the sealing fluid varies, so as to maintain a stable sealing state.

Specifically, reference may be made to the structure and materials of the conventional dust lip 207, which will not be described herein in detail.

In this embodiment, the plugging main body 2 further includes a secondary lip 208, where the end of the bearing section 204 near the first transmission member 4 forms the secondary lip 208, and the side of the secondary lip 208 near the sealing lip 201 can form an oil storage tank, so that when leakage occurs at the sealing lip 201, the leaked liquid can be temporarily blocked, and the leakage amount can be reduced.

Specifically, the auxiliary lip 208 is not particularly limited, and may be a labyrinth type, and may be formed as a reservoir and may be formed to reduce the leakage amount.

In this embodiment, the baffle 1 includes an abutment section 101, a seal section 103, and a connection section 102 connecting the abutment section 101 and the seal section 103, the abutment section 101 is disposed close to the main shaft 3, the abutment section 101 is adapted to be in abutment engagement with the second transmission member 5 through the first transmission member 4, the seal section 103 is disposed close to the plugging body 2 as compared with the abutment section 101, the seal section 103 is in abutment engagement with the seal lip 201, the seal section 103 is more convenient to be in abutment engagement with the seal lip 201 as compared with the plugging body 2, and meanwhile, the seal lip 201 can be more reliably in abutment with the seal section 103 due to a smaller space between the seal section 103 and the seal lip 201. It will be appreciated that, as an alternative embodiment, the baffle 1 may be a monolithic plate without relief, or a plate-like structure formed by more sections connected.

Specifically, the specific manufacturing mode of the baffle plate 1 is not limited, the baffle plate 1 can be manufactured by adopting the process of mold pressurizing, and the shape and thickness of the baffle plate 1 can be flexibly adjusted; the diameter of the inner ring of the baffle plate 1 is in clearance fit with the outer diameter of the main shaft 3, and the sealing lip 201 is only required to be attached to the end face of the second transmission member 5 during assembly.

Further, the first transmission member 4 is in abutting fit with the second transmission member 5 through the baffle plate 1, so that the position of the baffle plate 1 is fixed.

In this embodiment, the wall surface of the sealing section 103 is provided with backflow grooves, and in operation, the backflow grooves act like a screw pump, so that fluid leaking to the air side can be pumped back to the liquid side, and the oil return rate is far higher than that of a common oil seal.

Specifically, the arrangement form of the reflow pattern is not particularly limited, and may be one-way reflow, two-way reflow, or the like, and may be specifically selected according to the rotation direction of the spindle 3.

According to an embodiment of the present utility model, in another aspect, there is provided an engine including: the sealing device of the rotating shaft structure.

In the present embodiment, the engine includes an engine type such as a gasoline engine, a diesel engine, or the like.

In this embodiment, the engine further includes a crankshaft, a crank gear, a crank pulley and a gear chamber, the crankshaft is the main shaft 3, the crank pulley is the first transmission member 4, the crank gear is the second transmission member 5, the gear chamber is the end shell 6, when the engine is installed, the gear chamber is already installed, the crank gear is located on the crankshaft, the baffle 1 is attached to the end face of the crank gear, the blocking main body 2 is installed and is in abutting fit with the baffle 1, the crank pulley is screwed into the crankshaft through threaded fit, and the baffle 1 can be fixed and the blocking main body 2 is pressed on the gear chamber in the installation process of the crank pulley.

Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.

Claims (10)

1. A rotary shaft structure sealing device for shutoff rotary shaft structure's annular ring, rotary shaft structure includes main shaft (3), first driving medium (4), second driving medium (5) and end shell (6), first driving medium (4) with second driving medium (5) are suitable for the cover to establish main shaft (3) is last, end shell (6) with form between second driving medium (5) the annular ring, its characterized in that, sealing device includes:

the baffle plate (1) extends along the radial direction of the main shaft (3) and is suitable for being sleeved on the main shaft (3), and the baffle plate (1) is suitable for being fixedly arranged between the first transmission piece (4) and the second transmission piece (5);

The sealing device comprises a sealing main body (2) which is suitable for being arranged in an annular hole, a sealing lip (201) is formed on one side, close to a baffle plate (1), of the sealing main body (2), the inner side of the sealing main body (2) is matched with a first transmission piece (4), the outer side of the sealing main body (2) is matched with an end shell (6), and the sealing lip (201) of the sealing main body (2) is matched with the baffle plate (1) in an abutting mode.

2. The shaft structure sealing arrangement according to claim 1, characterized in that the blocking body (2) has elasticity and is interference fit with the first transmission member (4) and the end housing (6), respectively.

3. The shaft structure seal according to claim 1, wherein the blocking body (2) comprises a skeleton (202) and an elastic layer (203) wrapping the outside of the skeleton (202).

4. A shaft construction seal according to any one of claims 1 to 3, characterized in that the plugging body (2) comprises a carrier section (204) and a mating section (205), the mating section (205) being connected to an end of the carrier section (204) remote from the main shaft (3), the mating section (205) being adapted to mate with the end shell (6), the side of the carrier section (204) adjacent to the baffle (1) forming the sealing lip (201).

5. The shaft structure sealing device according to claim 4, characterized in that the plugging body (2) further comprises a positioning section (206), the positioning section (206) being connected with an end of the fitting section (205) remote from the baffle (1), the positioning section (206) extending in a direction away from the spindle (3), the positioning section (206) being adapted to fit with an end face of the end housing (6).

6. The shaft structure sealing arrangement according to claim 4, characterized in that the blocking body (2) further comprises a dust lip (207), the dust lip (207) being connected to a side of the carrier section (204) remote from the baffle (1), the carrier section (204) being adapted to cooperate with the first transmission member (4) via the dust lip (207).

7. The shaft structure seal according to claim 4, wherein the blocking body (2) further comprises a secondary lip (208), the carrier section (204) forming the secondary lip (208) near an end of the first transmission member (4).

8. A shaft construction seal according to any one of claims 1-3, characterized in that the baffle (1) comprises an abutment section (101), a sealing section (103) and a connecting section (102) connecting the abutment section (101) and the sealing section (103), the abutment section (101) being arranged close to the main shaft (3), the abutment section (101) being adapted for abutment fit with the second transmission member (5) via the first transmission member (4), the sealing section (103) being arranged close to the plugging body (2) than the abutment section (101), the sealing section (103) being in abutment fit with the sealing lip (201).

9. The shaft structure seal according to claim 8, characterized in that the wall surface of the seal section (103) is provided with a reflow pattern.

10. An engine, comprising: the spindle structure seal of any one of claims 1 to 9.