Spinning metering pump sealing structure and spinning metering pump

Abstract

The utility model discloses a spinning metering pump sealing structure and a spinning metering pump. The spinning metering pump sealing structure is used for sealing leakage positions of a driving shaft and a pump body and comprises a stuffing box arranged on the outer side of a front plate of the pump body, the stuffing box is arranged on the driving shaft in a sleeving mode, stuffing is arranged in the stuffing box, a pressing ring is arranged on the outer side of the stuffing, and a locking nut is arranged on the outer side of the pressing ring. After the locking nut is in threaded connection with the stuffing box, the pressing ring is pressed tightly, so that the stuffing is pressed tightly in the axial direction of the driving shaft, the inner side of the stuffing is a spiral sealing area, and a spiral sealing groove is formed in the inner surface of the spiral sealing area of the stuffing box. According to the sealing structure of the spinning metering pump, the gap between the driving shaft and the front plate of the spinning metering pump can be effectively sealed, a medium is prevented from leaking from the gap, and the problem of leakage is avoided through verification.

Description

Technical Field

[0001] The utility model relates to the technical field of spinning metering pumps, in particular to a spinning metering pump sealing structure and a spinning metering pump. Background Art

[0002] Most of the spinning metering pumps with current technology basically have a single sealing structure for the shaft head seal (such as a single packing seal, a single spiral seal, etc.). In many cases, the sealing effect is poor. For many spinning metering pumps, poor sealing effect will affect the user's production, and even more so, it will be dangerous. For example, the working medium leaking from the spinning metering pump - Lyocell fiber (i.e. green fiber) will carbonize and deteriorate under the action of high temperature for a long time, and it will burn, which is very dangerous and is not allowed by the user. Utility Model Content

[0003] The utility model aims to overcome the deficiencies and defects of the prior art and to provide a spinning metering pump sealing structure and a spinning metering pump.

[0004] The first aspect of the utility model provides a sealing structure for a spinning metering pump, which is used for sealing the leakage position of a driving shaft and a pump body, comprising a stuffing box arranged on the outside of a front plate of the pump body, the stuffing box being sleeved on the driving shaft, a stuffing box being arranged in the stuffing box, a pressure ring being arranged on the outside of the stuffing, a locking nut being provided on the outside of the pressure ring, and the locking nut being threadedly connected to the stuffing box to tighten the pressure ring, thereby pressing the stuffing along the axial direction of the driving shaft, the inside of the stuffing being a spiral sealing area, and the inner surface of the spiral sealing area of ​​the stuffing box forming a spiral sealing groove.

[0005] Wherein, the stuffing box is connected to the front plate by bolts.

[0006] Wherein, there are multiple bolts.

[0007] Wherein, the stuffing box is a T-shaped structure.

[0008] The stuffing box has a stuffing sealing area formed inside, the inner side of the stuffing sealing area is a spiral sealing area, and the inner diameter of the stuffing sealing area is larger than the inner diameter of the spiral sealing area of ​​the stuffing box.

[0009] Wherein, the pressure ring is located inside the packing installation area.

[0010] Wherein, the inner diameter of the inner end opening of the locking nut is larger than the inner diameter of the outer end opening, so that the outer end opening can press the pressure ring.

[0011] Wherein, the front plate is provided with reflux inclined holes for returning the leaked medium to the inlet of the spinning metering pump via the spiral sealing area.

[0012] Wherein, the spiral sealing groove is arranged to extend spirally from one end to the other end of the spiral sealing area.

[0013] A second aspect of the present invention provides a spinning metering pump, comprising the sealing structure of the spinning metering pump of the first aspect of the present invention.

[0014] The sealing structure of the spinning metering pump of the utility model can realize effective sealing of the driving shaft and the front plate gap of the spinning metering pump to prevent the medium from leaking through the gap. It has been verified that there will be no leakage problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the spinning metering pump of the utility model.

[0016] Figure 2 for Figure 1 Left side view of the spinning metering pump.

[0017] Figure 3 for Figure 1 Right side view of the spinning metering pump. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] like Figures 1 to 3 As shown, a sealing structure of a spinning metering pump according to an embodiment of the utility model is used for sealing the leakage position of the driving shaft 7 and the pump body (the clearance position between the driving shaft 7 and the axial hole of the front plate 8 of the pump), including a stuffing box 1 arranged on the outside of the front plate 8 of the pump body, the stuffing box is sleeved on the driving shaft 7, a stuffing 2 is arranged in the stuffing box, a pressure ring 4 is arranged on the outside of the stuffing, a locking nut 5 is arranged on the outside of the pressure ring 4, after the locking nut 5 is threadedly connected to the stuffing box, the pressure ring 4 is pressed, thereby pressing the stuffing along the axial direction of the driving shaft; the inner side of the stuffing is a spiral sealing area, and the inner surface of the spiral sealing area of ​​the stuffing box forms a spiral sealing groove 3.

[0020] In some embodiments, the stuffing box is connected to the front plate by bolts 14. There are multiple bolts. In some embodiments, the stuffing box is a T-shaped structure.

[0021] In some embodiments, the stuffing box has a stuffing sealing area formed inside, the inner side of which is a spiral sealing area, and the inner diameter of the stuffing sealing area is larger than the inner diameter of the spiral sealing area of ​​the stuffing box, so that the stuffing can be placed on the outside for external sealing.

[0022] The spiral sealing groove 3 formed on the inner surface of the spiral sealing area of ​​the stuffing box is arranged from one end to the other end of the spiral sealing area, so as to form the spiral sealing area. When the driving shaft rotates, the medium leaked from the gap between the outer circle of the driving shaft and the driving shaft hole of the front plate will be squeezed into the pump along the spiral groove in the spiral sealing area, and then returned to the pump inlet through the reflux inclined hole 6, so as to achieve the purpose of returning the leaked medium to the pump and prevent leakage.

[0023] In some embodiments, the pressure ring 4 is located inside the packing installation area, and the packing is a plurality of annular bodies, which are sleeved on the driving shaft and are in tight contact with the inner surface of the packing sealing area of ​​the stuffing box.

[0024] In some embodiments, the inner diameter of the inner end opening of the locking nut is larger than the inner diameter of the outer end opening, so that the outer end opening can press the pressure ring.

[0025] In some embodiments, the front plate is provided with backflow inclined holes 6 for returning the leaked medium to the inlet 16 of the spinning metering pump via the spiral sealing area.

[0026] In the sealing structure of the utility model, the gap between the outer circle of the driving shaft and the driving shaft hole of the front plate is used as the first seal. This is a hard seal. Relying on the processing accuracy of the parts and the design gap, it can ensure that the working medium passes through the gap to achieve the purpose of lubrication; it can also ensure that the medium passing through the gap is not excessive, otherwise it will cause a large leakage.

[0027] In the present application, the medium leaked from the gap between the outer circle of the driving shaft and the driving shaft hole of the front plate of the spinning metering pump will be squeezed into the pump along the spiral groove in the spiral sealing area when the driving shaft rotates, and then returned to the inlet of the pump through the reflux inclined hole, so as to achieve the purpose of returning the leaked medium to the pump.

[0028] The plugging seal is the last seal. The medium leaking from the spiral seal to the packing position is already quite small, and there will be basically no leakage through the packing seal. If there is still medium leakage, just tighten the locking nut slightly.

[0029] The utility model has a good sealing effect through the design and application of this combined seal, which solves the user's worries, thereby extending the service life of the gear pump and improving the quality of the product. Through repeated use, repeated trials and verifications in chemical fiber and lyocell fiber (also called Tencel) spinning metering pumps, the effect is very good and has been unanimously recognized by users. After stabilization, it has formed mass production, which can fully meet the user's use requirements and has a very obvious effect.

[0030] The sealing structure of the spinning metering pump of the utility model can effectively seal the gap between the driving shaft and the front plate of the spinning metering pump to prevent the medium from leaking from the gap. It has been verified that there will be no leakage problem. The sealing structure of the spinning metering pump of the utility model has proved that the design is reasonable and the effect is very obvious through the design and application of this combined seal.

[0031] The second aspect of the utility model provides a spinning metering pump, including the sealing structure of the spinning metering pump of the first aspect of the utility model, the spinning metering pump also includes a rear plate 10, a gear plate 9 located between the front plate 8 and the rear plate 10, which are assembled together through a plurality of screws 15, a driving gear 11 and a passive gear 12 are arranged inside the gear plate, the driving gear 11 is connected to the driving shaft, the passive gear 12 is connected to the passive shaft 13, the driving shaft partially extends out of the pump body, when the driving shaft rotates, the driving gear is meshed with the passive gear, so as to drive the passive shaft to rotate, so that the medium enters the pump body from the inlet 16 of the pump body and is discharged from the outlet 17, so as to realize the transportation of the medium.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

[0033] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. The sealing structure of the spinning metering pump is characterized in that: The invention is used for sealing the leakage position of the driving shaft and the pump body, and comprises a stuffing box arranged on the outside of the front plate of the pump body, the stuffing box is sleeved on the driving shaft, stuffing is arranged in the stuffing box, a pressure ring is arranged on the outside of the stuffing, a locking nut is arranged on the outside of the pressure ring, after the locking nut is threadedly connected with the stuffing box, the pressure ring is compressed, so that the stuffing is compressed along the axial direction of the driving shaft, the inside of the stuffing is a spiral sealing area, and the inner surface of the spiral sealing area of ​​the stuffing box forms a spiral sealing groove.

2. The sealing structure of the spinning metering pump according to claim 1, characterized in that: The stuffing box is connected to the front plate by bolts.

3. The sealing structure of the spinning metering pump according to claim 2, characterized in that: The number of the bolts is multiple.

4. The sealing structure of the spinning metering pump according to claim 1, characterized in that: The stuffing box is a T-shaped structure.

5. The sealing structure of the spinning metering pump according to claim 1, characterized in that: The stuffing box has a stuffing sealing area formed inside, the inner side of the stuffing sealing area is a spiral sealing area, and the inner diameter of the stuffing sealing area is larger than the inner diameter of the spiral sealing area of ​​the stuffing box.

6. The sealing structure of the spinning metering pump according to claim 5, characterized in that: The pressure ring is located inside the packing installation area.

7. The sealing structure of the spinning metering pump according to claim 1, characterized in that: The inner diameter of the inner end opening of the locking nut is greater than the inner diameter of the outer end opening, so that the outer end opening can press the pressure ring.

8. The sealing structure of the spinning metering pump according to claim 5, characterized in that: The front plate is provided with backflow oblique holes for returning the leaked medium to the inlet of the spinning metering pump via the spiral sealing area.

9. The sealing structure of the spinning metering pump according to claim 1, characterized in that: The spiral sealing groove is arranged to extend spirally from one end to the other end of the spiral sealing area.

10. A spinning metering pump, characterized in that: The invention comprises the sealing structure of a spinning metering pump as described in any one of claims 1 to 9.

Images