CN220646748U - Rotary sealing device for crankshaft oil inlet oil way - Google Patents

Abstract

The utility model discloses a rotary sealing device for an oil inlet path of a crankshaft, which comprises a bearing and a cover body which are connected in a matched manner, wherein the bearing is connected with the crankshaft in a supporting manner, the bearing is clamped in a case, the cover body is fixedly connected to one side of the case far away from the crankshaft, a gland joint is movably sleeved between the bearing and the cover body, the inner end of the gland joint is fixedly connected with the crankshaft, the outer end of the gland joint is connected with a high-speed rotary joint, and oil passing holes of the high-speed rotary joint, the gland joint and the crankshaft are sequentially communicated and can rotate together at a high speed under the support of the bearing. The utility model can prevent oil leakage; the other end of the gland connector extends out of the cover body to be connected with the high-speed rotary connector and drives the high-speed rotary connector to rotate at a high speed, the axial and radial runout generated by the crankshaft cannot impact and runout the high-speed rotary connector in the corresponding direction, the sealing component can be prevented from being damaged, the tightness is good, the stability of lubricating oil supply of the crankshaft is guaranteed, the service life of the sealing component is prolonged, and the maintenance is convenient.

Description

Rotary sealing device for crankshaft oil inlet oil way

Technical Field

The utility model relates to the technical field of crankshaft lubrication and sealing, in particular to a rotary sealing device for a crankshaft oil inlet passage.

Background

In the existing metal strip high-pressure water jet sand blasting cleaning production line, a three-plunger high-pressure pump is mainly used for providing a pressure water source for a descaling spray head, the power end of the three-plunger high-pressure pump is a core component for power transmission of the plunger pump, and the lubricating effect of an internal crankshaft of the three-plunger high-pressure pump is directly related to whether the high-pressure pump can stably operate or not, so that whether the high-pressure water jet sand blasting cleaning production line can normally operate or not is influenced.

In the power end of the three-plunger high-pressure pump, lubricating oil enters from the end part of the crankshaft and is conveyed to three crank positions through the inside of the crankshaft to lubricate the bearing bush and the end part of the connecting rod, and the lubrication effect is directly influenced by the mechanical seal of the end part of the crankshaft. One end of the mechanical seal at the end of the crankshaft is embedded into the crankshaft, the other end of the mechanical seal is inserted with an oil inlet sleeve, and the other end of the sleeve is inserted into the cover body, as shown in the prior mechanical seal device at the end of the crankshaft in figure 3. When the power end works, the mechanical seal and the sleeve are often impacted by the crankshaft, so that the mechanical seal and the sleeve are easy to deform and damage, the sealing effect of the end part of the crankshaft cannot be ensured, the oil supply of the crankshaft is unstable, the lubricating effect is poor, the service life of the mechanical seal and the sleeve is short, frequent replacement is needed, and the use and maintenance of the power end of the high-pressure pump are not facilitated.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the rotary sealing device for the crankshaft oil inlet path, which is not influenced by axial and radial runout of the crankshaft to impact and runout in corresponding directions, is not easy to deform and damage, has good sealing performance and good oil supply stability, and is convenient to maintain.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a rotary seal device of bent axle oil feed oil circuit, includes bearing and the lid that the cooperation is connected, support is connected with the bent axle in the bearing, the bearing cartridge is in quick-witted case, lid fixed connection is in the one side that the bent axle was kept away from to the machine case, movable seal cover is equipped with the gland and connects between bearing and the lid, the inner and the bent axle fixed connection that the gland connects, the outer end that the gland connects is connected with high-speed swivel joint, gland connect and bent axle three's oilhole intercommunication in proper order, and the three can be rotated together at a high speed under the support of bearing.

As a further improvement of the above technical scheme:

and a sealing element is connected between the cover body and the gland joint in a sealing way.

The sealing piece comprises a clamp spring and a framework oil seal, wherein the clamp spring is arranged on the outer side of an inner hole of the cover body, and the framework oil seal is arranged between the gland joint and the clamp spring.

The inner side of the inner hole of the cover body is provided with a limiting step, and the limiting step is positioned on one side of the framework oil seal, which is close to the gland joint. And a heat dissipation cavity is arranged among the bearing, the cover body, the gland joint and the framework oil seal.

The gland joint is fixedly connected to the crankshaft through a screw.

And a sealing ring is connected between the gland joint and the crankshaft in a sealing way, and the sealing ring is sleeved on the circumferential direction of the gland joint and is positioned in an oil inlet of the crankshaft.

The high-speed rotary joint comprises a rotary screw rod and a shell, one end of the rotary screw rod is in threaded connection with the gland joint, and the shell is movably sleeved at the other end of the rotary screw rod.

Compared with the prior art, the utility model has the advantages that:

one end of the gland joint is connected with the crankshaft and rotates along with the crankshaft, and the middle part of the gland joint passes through the cover body and is sealed with the cover body through the sealing piece, so that oil leakage can be prevented; the other end of the gland joint extends out of the cover body to be connected with the high-speed rotary joint and drives the high-speed rotary joint to rotate at a high speed, a mechanical sealing structure of an oil way between the end part of the original crankshaft and the cover body is replaced by a high-speed rotary oil seal outside the case, and axial and radial runout generated by the crankshaft cannot impact and runout the high-speed rotary joint in the corresponding direction, so that the sealing part is effectively prevented from being damaged, the sealing performance is good, the stability of lubrication oil supply of the crankshaft is guaranteed, the service life of the sealing part is prolonged, and the maintenance is convenient.

Drawings

Fig. 1 is a schematic structural view of a rotary sealing device for an oil inlet path of a crankshaft.

Fig. 2 is a schematic structural view of a high-speed rotary joint.

Fig. 3 is a schematic structural view of a mechanical seal device for an end portion of a conventional crankshaft.

Legend description:

100. a crankshaft; 200. a chassis; 300. an oil inlet joint; 301. mechanical sealing; 302. a sleeve; 1. a bearing; 2. a cover body; 21. a limit step; 22. an inner hexagon screw; 3. a gland joint; 31. an oil passing hole; 32. a screw; 4. a high-speed rotary joint; 41. rotating the screw; 42. a housing; 5. a seal; 51. clamping springs; 52. a framework oil seal; 6. a heat dissipation cavity; 7. and (3) sealing rings.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the specific examples.

As shown in fig. 1, the rotary sealing device for the oil inlet path of the crankshaft in this embodiment includes a bearing 1 and a cover 2 which are cooperatively connected, wherein the bearing 1 is supported and connected with the crankshaft 100, the bearing 1 is clamped in a chassis 200, the cover 2 is fixedly connected to one side of the chassis 200 far away from the crankshaft 100, a gland joint 3 is movably sealed and sleeved between the bearing 1 and the cover 2, the inner end of the gland joint 3 is fixedly connected with the crankshaft 100, the outer end of the gland joint 3 is connected with a high-speed rotary joint 4, and oil holes 31 of the high-speed rotary joint 4, the gland joint 3 and the crankshaft 100 are sequentially communicated and can rotate together at a high speed under the support of the bearing 1. The gland joint 3 is connected with the crankshaft 100 and rotates together with the crankshaft 100, and the middle part of the gland joint passes through the cover body 2 and is sealed with the cover body 2 through the sealing piece 5, so that oil leakage can be prevented; the other end of the gland joint 3 extends out of the cover body 2 to be connected with the high-speed rotary joint 4 and can rotate at a high speed together, so that lubricating oil can be stably conveyed to the interior of the crankshaft 100 through the oil passing holes 31 which are sequentially connected through the high-speed rotary joint 4 for lubrication; and the axial and radial runout generated by the crankshaft 100 can not generate impact and runout in the corresponding direction on the high-speed rotary joint 4, so that the damage to the sealing component is effectively avoided, the sealing performance is good, the stability of lubrication oil supply of the crankshaft 100 is ensured, the service life of the sealing component is prolonged, and the maintenance is convenient. In the conventional three-plunger high-pressure pump, however, the mechanical seal 301 and the sleeve 302 between the crankshaft 100 and the oil feed joint 300 are extremely easily damaged, as shown in fig. 3.

In this embodiment, a sealing member 5 is sealingly connected between the cover 2 and the gland nipple 3. The power end of the crankshaft 100 can be sealed by the seal 5 to prevent leakage of lubricating oil.

In this embodiment, the sealing member 5 includes a clamp spring 51 and a frame oil seal 52, the clamp spring 51 is disposed at the outer side of the inner hole of the cover body 2, and the frame oil seal 52 is disposed between the gland connector 3 and the clamp spring 51. The clamp spring 51 and the framework oil seal 52 are easy to purchase and convenient to assemble.

In this embodiment, a limiting step 21 is disposed on the inner side of the inner hole of the cover body 2, and the limiting step 21 is located on one side of the framework oil seal 52 close to the gland joint 3. The positioning and limiting of the framework oil seal 52 can be formed together with the clamp spring 51 through the limiting step 21.

In this embodiment, a heat dissipation cavity 6 is provided between the bearing 1, the cover 2, the gland connector 3 and the skeleton oil seal 52. The heat dissipation cavity 6 can facilitate lubrication and heat dissipation of all parts including the bearing 1.

In this embodiment, the gland union 3 is fixedly attached to the crankshaft 100 by screws 32. The screw 32 is easy to purchase and has good installation firmness.

In this embodiment, a sealing ring 7 is connected between the gland connector 3 and the crankshaft 100 in a sealing manner, and the sealing ring 7 is sleeved on the circumferential direction of the gland connector 3 and is located in an oil inlet of the crankshaft 100. The sealing ring 7 is an O-shaped ring, and radial sealing is carried out through the O-shaped ring, so that the sealing effect between the gland joint 3 and the oil inlet end face of the crankshaft 100 can be ensured.

In this embodiment, the high-speed rotary joint 4 includes a rotary screw 41 and a housing 42, one end of the rotary screw 41 is in threaded connection with the gland joint 3, and the housing 42 is movably sleeved at the other end of the rotary screw 41. When the crankshaft 100 works, the gland joint 3 and the rotary screw 41 are driven to move simultaneously, the rotary screw 41 and the shell 42 relatively rotate, the rotary screw 41 is sleeved inside the shell 42 in a movable way because the shell 42 is not fixed, the rotary screw 41 rotates at a high speed along with the crankshaft 100, end face sealing is adopted inside the shell 42, and the shell 42 does not rotate, as shown in fig. 2.

In this embodiment, the cover 2 is fixedly connected to the chassis 200 by the socket head cap screws 22.

The above description is merely a preferred embodiment of the present utility model, and the scope of the present utility model is not limited to the above examples. Modifications and variations which would be obvious to those skilled in the art without departing from the spirit of the utility model are also considered to be within the scope of the utility model.

Claims (8)

1. The utility model provides a rotary seal device of bent axle oil feed oil circuit, includes bearing (1) and lid (2) that the cooperation is connected, support in bearing (1) is connected with bent axle (100), bearing (1) cartridge is in quick-witted case (200), lid (2) fixed connection is kept away from one side of bent axle (100) in quick-witted case (200), a serial communication port, movable seal cover is equipped with gland joint (3) between bearing (1) and lid (2), the inner and bent axle (100) fixed connection of gland joint (3), the outer end of gland joint (3) is connected with high-speed rotary joint (4), oil hole (31) of crossing of high-speed rotary joint (4), gland joint (3) and bent axle (100) three communicate in proper order, and the three can be rotated at a high speed together under the support of bearing (1).

2. The rotary sealing device of the crankshaft oil inlet way according to claim 1, wherein a sealing element (5) is connected between the cover body (2) and the gland joint (3) in a sealing way.

3. The rotary sealing device of the crankshaft oil inlet way according to claim 2, wherein the sealing piece (5) comprises a clamp spring (51) and a framework oil seal (52), the clamp spring (51) is arranged on the outer side of an inner hole of the cover body (2), and the framework oil seal (52) is arranged between the gland joint (3) and the clamp spring (51).

4. The rotary sealing device for the crankshaft oil inlet path according to claim 3, wherein a limiting step (21) is arranged on the inner side of the inner hole of the cover body (2), and the limiting step (21) is positioned on one side, close to the gland joint (3), of the framework oil seal (52).

5. The rotary sealing device for the crankshaft oil inlet path according to claim 4, wherein a heat dissipation cavity (6) is arranged among the bearing (1), the cover body (2), the gland joint (3) and the framework oil seal (52).

6. The rotary seal device of a crankshaft oil feed path according to any one of claims 1 to 5, characterized in that the gland joint (3) is fixedly connected to the crankshaft (100) by means of screws (32).

7. The rotary sealing device of a crankshaft oil inlet way according to any one of claims 1-5, characterized in that a sealing ring (7) is connected between the gland joint (3) and the crankshaft (100) in a sealing manner, and the sealing ring (7) is sleeved on the circumferential direction of the gland joint (3) and is positioned in an oil inlet of the crankshaft (100).

8. The rotary sealing device for the oil inlet path of the crank shaft according to any one of claims 1 to 5, wherein the high-speed rotary joint (4) comprises a rotary screw (41) and a shell (42), one end of the rotary screw (41) is in threaded connection with the gland joint (3), and the shell (42) is movably sleeved at the other end of the rotary screw (41).