Circulating cooling device for mechanical seal shaft sleeve

Abstract

The utility model relates to a mechanical seal shaft sleeve circulating cooling device which is characterized in that a mechanical seal comprises a shaft sleeve and a cavity, the shaft sleeve is sleeved on a main shaft, a main seal is arranged between the shaft sleeve and the cavity, an annular groove is formed in the inner side of the middle of the shaft sleeve, a liquid inlet hole and a liquid outlet hole are formed in the annular groove, and the liquid inlet hole is communicated with the liquid outlet hole. A first liquid inlet and a liquid outlet are formed in the cavity, the first liquid inlet corresponds to the liquid inlet hole through a first liquid inlet channel, the liquid outlet hole is communicated with a gap between the cavity and the shaft sleeve, and the liquid outlet is communicated with a gap between the cavity and the shaft sleeve through a liquid outlet channel. The device can effectively relieve conduction heat of the device shaft to the mechanical seal, a system for cooling the device shaft and a system for cooling and lubricating the mechanical seal can share one set of flushing system, and the mechanical seal can be cooled while the device shaft is cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal sleeve circulating cooling device. Background Art

[0002] Mechanical seals are often installed in side agitators or pumps in chemical processes, petrochemicals, pharmaceuticals, food, and other industries. For high-temperature working conditions of mechanical seals, the main heat transfer position of the mechanical seal is the main shaft of the pump or kettle. However, the current mechanical seal cooling mainly uses water to pass between the cavity and the sleeve to cool the cavity, main seal, and sleeve, but does not directly cool the main shaft. Therefore, the cooling effect is relatively slow. In addition, the existing mechanical seals can only prevent the medium from leaking from the sleeve and the cavity, but cannot prevent the medium in the pump or kettle from leaking from the main shaft. Utility Model Content

[0003] The purpose of the utility model is to provide a mechanical seal sleeve circulating cooling device in order to overcome the defects of the prior art.

[0004] In order to achieve the purpose of the utility model, the present application provides the following technical solutions.

[0005] In a first aspect, the present application provides a mechanical seal sleeve circulating cooling device, wherein the mechanical seal comprises a sleeve and a cavity, wherein the sleeve is mounted on a main shaft, a main seal is arranged between the sleeve and the cavity, an annular groove is arranged on the inner side of the middle portion of the sleeve, and a liquid inlet hole and a liquid outlet hole are arranged on the annular groove, a first liquid inlet and a liquid outlet are arranged on the cavity, the first liquid inlet corresponds to the liquid inlet through a first liquid inlet channel, the liquid outlet is connected to the gap between the cavity and the sleeve, and the liquid outlet is connected to the gap between the cavity and the sleeve through the liquid outlet channel.

[0006] In one embodiment of the first aspect, lip seals are provided on both sides of the liquid inlet hole, the lip seals are arranged between the cavity and the sleeve, the two lip seals, the inner wall of the cavity and the outer wall of the sleeve form a liquid inlet space, the liquid inlet hole is located on the side wall of the sleeve in the liquid inlet space, and the first liquid inlet channel is connected to the liquid inlet space.

[0007] In an implementation of the first aspect, a stopper is provided on the inner wall of the cavity located in the liquid inlet space, the stopper is located at an outlet side of the first liquid inlet channel, and a gap is left between the stopper and the outer wall of the sleeve.

[0008] In one embodiment of the first aspect, the main purpose of the inclined hole is that when the main shaft rotates clockwise, the inclined hole directly faces the direction of the fluid at a certain angle, so that the fluid can rush directly from the cavity annulus into the sleeve annulus as much as possible. The angle is determined according to the actual working conditions.

[0009] In one implementation of the first aspect, the diameter of the liquid inlet hole is 3-5 mm.

[0010] In an implementation of the first aspect, the liquid inlet hole is located on a side of the shaft sleeve away from the medium, and the liquid outlet hole is located on a side of the shaft sleeve close to the medium.

[0011] In an implementation manner of the first aspect, O-rings are provided between both ends of the sleeve and the main shaft.

[0012] Compared with the prior art, the beneficial effect of the utility model is that the device can effectively alleviate the heat conduction from the equipment shaft to the machine seal, and the system for cooling the equipment shaft can share a flushing system with the system for cooling and lubricating the machine seal, so that the machine seal can be cooled while cooling the equipment shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic cross-sectional structure diagram of the mechanical seal sleeve circulating cooling device of the present application;

[0014] Figure 2 Schematic diagram of the cross-sectional structure at the liquid inlet.

[0015] In the accompanying drawings, 1 is a lip seal ring, 2 is a sleeve, 3 is a first O-ring, 4 is a compensation ring, 5 is a second O-ring, 6 is a main shaft, 7 is a liquid outlet, 8 is a cavity, 9 is a first liquid inlet, 10 is a first liquid inlet channel, 11 is a liquid inlet hole, 12 is a second liquid inlet, 13 is a second liquid inlet channel, 14 is a liquid outlet, 15 is a liquid outlet channel, 16 is an annular groove, 17 is a stopper, and 18 is a liquid inlet space. DETAILED DESCRIPTION

[0016] Unless otherwise defined, the technical terms or scientific terms used in this specification and claims shall have the ordinary meanings understood by persons with ordinary skills in the technical field to which the utility model belongs. All the values ​​from the lowest value to the highest value listed in this article refer to all the values ​​obtained by incrementing one unit between the lowest value and the highest value when the difference between the lowest value and the highest value is more than two units.

[0017] The following will describe the specific implementation of the utility model. It should be noted that in the specific description of these implementations, in order to provide a concise description, this specification cannot provide a detailed description of all the features of the actual implementation. Without departing from the spirit and scope of the utility model, those skilled in the art may modify and replace the implementation of the utility model, and the resulting implementation is also within the scope of protection of the utility model.

[0018] The purpose of the present application is to provide a mechanical seal sleeve circulation cooling device, the mechanical seal includes a sleeve and a cavity, the sleeve is arranged on the main shaft, a main seal is arranged between the sleeve and the cavity, an annular groove is arranged on the inner side of the middle part of the sleeve, and a liquid inlet hole and a liquid outlet hole are arranged on the annular groove, a first liquid inlet and a liquid outlet are arranged on the cavity, the first liquid inlet corresponds to the liquid inlet through the first liquid inlet channel, the liquid outlet is connected to the gap between the cavity and the sleeve, and the liquid outlet is connected to the gap between the cavity and the sleeve through the liquid outlet channel. The present application has an annular groove on the inner side of the sleeve, and the coolant can be directly injected into the annular groove to directly cool the main shaft, and the cooling effect is more direct and rapid. In addition, a second liquid inlet is also provided to cool the cavity and the sleeve, further improving the cooling effect.

[0019] In a specific embodiment, lip seals are provided on both sides of the liquid inlet hole, the lip seals are arranged between the cavity and the sleeve, the two lip seals, the inner wall of the cavity and the outer wall of the sleeve form a liquid inlet space, the liquid inlet hole is located on the side wall of the sleeve in the liquid inlet space, and the first liquid inlet channel is connected to the liquid inlet space. The lip seals are provided to prevent the coolant from leaking to both sides, thereby ensuring that the coolant smoothly enters the annular groove of the sleeve.

[0020] In a specific embodiment, a stopper is provided on the inner wall of the cavity in the liquid inlet space, the stopper is located on the outlet side of the first liquid inlet channel, and a gap is left between the stopper and the outer wall of the sleeve. The stopper is integrated with the cavity, so the stopper is a stationary part, and the sleeve is a rotating part. If no gap is left, friction will be generated between the stationary part and the rotating part, so that the stopper or the sleeve will be worn, and even sparks will be generated by friction.

[0021] In a specific implementation, the liquid inlet hole is located on a side of the shaft sleeve away from the medium, and the liquid outlet hole is located on a side of the shaft sleeve close to the medium.

[0022] In a specific implementation, O-rings are provided between both ends of the sleeve and the main shaft.

[0023] Example

[0024] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0025] Example 1

[0026] A mechanical seal sleeve circulating cooling device, the structure of which Figure 1As shown, the mechanical seal includes a shaft sleeve 2, a compensation ring 4 and a cavity 8. An annular groove 16 is provided on the inner side of the middle of the shaft sleeve 2, and a liquid inlet hole 11 and a liquid outlet hole 7 are provided on the annular groove 16. Lip seals 1 are provided on both sides of the liquid inlet hole 11 and between the cavity 8 and the shaft sleeve 2. The lip seals 1 and the inner wall of the cavity 8 and the outer wall of the shaft sleeve 2 form a liquid inlet space 18. Figure 2 As shown, the liquid inlet hole 11 is located on the side wall of the sleeve 2 in the liquid inlet space 18, and the first liquid inlet channel 10 is connected to the liquid inlet space 18. A stopper 17 is provided on the inner wall of the cavity 8 in the liquid inlet space 18, and the stopper 17 is located on the outlet side of the first liquid inlet channel 10, and a gap of 0.5 mm is left between the stopper 17 and the outer wall of the sleeve 2. The liquid outlet hole 7 is connected to the gap between the cavity 8 and the sleeve 2, and the liquid outlet 14 is connected to the gap between the cavity 8 and the sleeve 2 through the liquid outlet channel 15.

[0027] In the cooling device, the sealed coolant enters the annular groove 16 in sequence through the first liquid inlet 9, the first liquid inlet channel 10, the liquid inlet space 18, and the liquid inlet hole 11. The lip seals 1 at both ends are used to prevent the coolant from leaking to both ends. To ensure that the coolant smoothly enters the annular groove 16, when the main shaft 6 drives the sleeve 2 to rotate clockwise, the block 17 blocks the cooling water at the coolant entry position, so that most of the cooling water stays in area A, forming a high-pressure area in area A, and a small amount of water enters area B through the gap. When the sleeve 2 rotates, when the liquid inlet hole 11 passes through area A, the coolant can be effectively flushed into the annular groove 16, and the cooling water flows from position M to position N, and flows to the space between the sleeve 2 and the cavity 8 at the position of the liquid outlet hole 7, and finally flows out from the position of the liquid outlet 14 through the liquid outlet channel 15.

[0028] The sealing coolant can enter the annular groove 16 and the sealing cavity (i.e., the space between the cavity 8 and the sleeve 2) from the first liquid inlet 9. At the same time, it can also enter the sealing cavity (i.e., the space between the cavity 8 and the sleeve 2) from the second liquid inlet 12 via the second liquid inlet channel 13. The PLAN52 or PLAN53 system can be shared. The coolant entering from the second liquid inlet 12 passes through the first O-ring 3 to cool the compensation ring 4, and then is discharged from the liquid outlet 14.

[0029] When using the PLAN53 system, because the pressure of the cooling water is higher than the pressure of the medium to be sealed, after the isolation liquid enters the annular groove 16 inside the sleeve 2 from the A1 inlet, the pressure of the annular groove 16 at the position of the O-ring 5 is higher than the pressure of the medium, so it effectively prevents the medium from leaking from the inner hole of the sleeve 2 to the atmosphere side, achieving zero leakage of the medium.

[0030] When using the PLAN52 system, because the pressure of the cooling water is lower than the pressure of the medium to be sealed, after the buffer enters the annular groove 16 from the first liquid inlet 9, the pressure of the annular groove 16 at the second O-ring 5 position is lower than the pressure of the medium. Therefore, when the medium leaks in the inner hole of the sleeve 2, it will first leak into the PLAN52 system and will not leak directly to the atmosphere, thereby achieving zero leakage of the medium.

[0031] The above description of the embodiments is to facilitate those of ordinary skill in the art to understand and apply the present application. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to pay creative labor. Therefore, the present application is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the contents disclosed in the present application without departing from the scope and spirit of the present application are within the scope of the present application.

Claims

1. A mechanical seal sleeve circulation cooling device, the mechanical seal comprises a sleeve and a cavity, the sleeve is sleeved on the main shaft, a main seal is arranged between the sleeve and the cavity, characterized in that: An annular groove is provided on the inner side of the middle part of the sleeve, and a liquid inlet hole and a liquid outlet hole are provided on the annular groove, a first liquid inlet port and a liquid outlet port are provided on the cavity, the first liquid inlet port corresponds to the liquid inlet hole through a first liquid inlet channel, the liquid outlet hole is connected to the gap between the cavity and the sleeve, and the liquid outlet is connected to the gap between the cavity and the sleeve through the liquid outlet channel.

2. The mechanical seal sleeve circulating cooling device according to claim 1, characterized in that: Lip seals are provided on both sides of the liquid inlet hole, and the lip seals are arranged between the cavity and the sleeve. The two lip seals, the inner wall of the cavity and the outer wall of the sleeve form a liquid inlet space. The liquid inlet hole is located on the side wall of the sleeve in the liquid inlet space, and the first liquid inlet channel is connected to the liquid inlet space.

3. The mechanical seal sleeve circulating cooling device according to claim 2, characterized in that: A stopper is provided on the inner wall of the cavity in the liquid inlet space. The stopper is located at one side of the outlet of the first liquid inlet channel, and a gap is left between the stopper and the outer wall of the sleeve.

4. The mechanical seal sleeve circulating cooling device according to claim 3, characterized in that: The diameter of the liquid inlet hole is 3-5 mm.

5. The mechanical seal sleeve circulating cooling device according to claim 1, characterized in that: The liquid inlet hole is located at a side of the shaft sleeve away from the medium, and the liquid outlet hole is located at a side of the shaft sleeve close to the medium.

6. The mechanical seal sleeve circulating cooling device according to claim 1, characterized in that: O-rings are arranged between the two ends of the shaft sleeve and the main shaft.

Images