CN217354750U - Spiral sealing structure and oil-free compressor comprising same - Google Patents
Spiral sealing structure and oil-free compressor comprising same Download PDFInfo
- Publication number
- CN217354750U CN217354750U CN202220455731.5U CN202220455731U CN217354750U CN 217354750 U CN217354750 U CN 217354750U CN 202220455731 U CN202220455731 U CN 202220455731U CN 217354750 U CN217354750 U CN 217354750U
- Authority
- CN
- China
- Prior art keywords
- sealing
- spiral
- annular boss
- sealing ring
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sealing Devices (AREA)
Abstract
A spiral sealing structure and an oil-free compressor comprising the same are disclosed, the structure comprises a sealing seat and a spiral sealing ring, wherein the inner wall of the sealing seat is provided with a mounting groove and a step groove, the spiral sealing ring is sleeved in the sealing seat, a sealing gasket is arranged between the spiral sealing ring and the step groove, and the sealing gasket is used for sealing between the spiral sealing ring and the sealing seat; and the mounting groove is internally provided with an ejecting piece which is used for ejecting the spiral sealing ring to be fixed in the sealing seat. The above-mentioned technical scheme of this application has dismantles and changes the convenience, sealed effectual advantage.
Description
Technical Field
The application relates to the technical field of sealing structures of compressors, in particular to a spiral sealing structure and an oil-free compressor with the same.
Background
Generally, the compression cavity of the oil-free screw compressor is in an oil-free state in the working process, so that the compressor can be applied to different high-end fields such as textiles, food, medical appliances and the like. Although the compression chamber is oil-free, in order to drive the compressor to operate effectively, lubricating oil is needed to lubricate and cool the bearings and gears on the compressor, so that the sealing between the compression chamber and the gear box in the oil-free screw compression host is very important. If the sealing performance is poor, lubricating oil supplied to a bearing and a gear is leaked to a compression cavity, so that a trace amount of lubricating oil exists in gas compressed by an oil-free screw, and once the lubricating oil exists in the compression cavity, the quality of a product is affected, and adverse effects are caused to a user.
SUMMERY OF THE UTILITY MODEL
This application is not enough to prior art's the aforesaid, provides one kind and dismantles the spiral seal structure of changing convenience, sealed effectual.
In order to achieve the purpose, the invention provides the following technical scheme: a spiral sealing structure comprises a sealing seat and a spiral sealing ring, wherein the inner wall of the sealing seat is provided with a mounting groove and a step groove, the spiral sealing ring is sleeved in the sealing seat, a sealing gasket is arranged between the spiral sealing ring and the step groove, and the sealing gasket is used for sealing between the spiral sealing ring and the sealing seat; and a pushing part is arranged in the mounting groove and used for pushing the spiral sealing ring to be fixed in the sealing seat.
By adopting the structure, the split sealing structure is arranged, and the integral sealing structure is divided into the sealing seat and the spiral sealing ring, so that in the actual use process, if the sealing element is damaged, only corresponding failed parts need to be replaced, and the maintenance is more convenient; in addition, the split structure saves materials and reduces cost; and the sealing gasket is arranged for sealing, so that the sealing seat and the spiral sealing ring which are contacted with each other are tightly sealed under the pressure action of the ejector, and the sealing effect of the integral sealing structure is improved.
Furthermore, the spiral sealing ring comprises a sealing ring body, a first annular boss is radially arranged on the sealing ring body, and the outer diameter of the first annular boss is matched with the inner diameter of the sealing seat; the ejector piece is positioned on the upper surface of the first annular boss and radially extends into the mounting groove; by adopting the structure, the spiral sealing ring and the sealing seat can be smoothly sleeved, the thread sealing ring can be pushed to be fixed in the sealing seat under the combined action of the mounting groove and the first annular boss through the mounting position of the pushing piece, and the sealing washer is always pressed to realize effective sealing.
Furthermore, the stepped groove is positioned below the mounting groove, the inner diameter of the stepped groove is smaller than the outer diameter of the first annular boss, and the sealing gasket is positioned between the first annular boss and the stepped groove and ensures that a gap is formed between the first annular boss and the stepped groove; by adopting the structure, the pressing force of the first annular boss on the sealing washer can be always kept under the pressure action of the ejector piece, and the effective sealing between the spiral sealing ring and the sealing seat is realized; meanwhile, the gap between the first annular boss and the step groove is kept through the arrangement of the sealing washer, so that the sealing washer can be effectively protected from being in contact with the sealing seat to generate scratch and affect the sealing effect.
Furthermore, a second annular boss is arranged on the sealing ring body and positioned below the first annular boss, the outer diameter of the second annular boss is larger than the inner diameter of the step groove and smaller than the outer diameter of the step groove, and the axial lower end face of the second annular boss abuts against the step groove; by adopting the structure, the fixing position between the sealing ring body and the sealing seat can be further stabilized.
Furthermore, a plurality of axially arranged grooves are formed in the inner side wall of the threaded sealing ring, and a gap is formed between the inner side wall of the threaded sealing ring and the rotor shaft; by adopting the structure, a gap is formed between the sealing ring and the rotor shaft, the spiral sealing element is still when the main machine operates, and the rotor rotates at high speed, so that the spiral sealing effect is achieved; and the arrangement of the groove can realize that oil gas is filled in the groove and the gap to form a 'liquid nut', so that effective sealing is realized.
Furthermore, a third annular boss is arranged on the upper surface of the first annular boss in the axial direction, and the difference between the outer diameter of the third annular boss and the outer diameter of the first annular boss is smaller than the radial width of the ejector; by adopting the structure, after the ejector is arranged in the mounting groove, under the abutting of the third annular boss, the ejector cannot deviate radially to cause uneven ejection force to all directions of the threaded sealing ring, and cannot generate the problem that radial deviation causes large ejection fixation to the threaded sealing ring.
Furthermore, the sealing washer is an O-shaped sealing washer, and the diameter of the O-shaped sealing washer is larger than the axial thickness of the second annular boss; by adopting the structure, the O-shaped sealing ring can be sleeved on the outer side wall of the second annular boss, and the pressing force between the pushing piece and the step groove is combined, so that the O-shaped sealing ring is pressed and deformed to realize sealing.
Furthermore, the ejection piece is a wave spring or a snap spring.
Further, this application the thread sealing ring that thread sealing ring copper or aluminium were prepared, the seal receptacle be the seal receptacle of carbon steel preparation.
Furthermore, this application the seal receptacle along being provided with the arch on axial terminal surface, the arch be four evenly distributed on this axial terminal surface, the axial terminal surface be
The application also provides an oil-free compressor, and the oil-free compressor contains the spiral sealing structure.
Drawings
Fig. 1 is a schematic view (lateral) of the screw seal structure of the present application.
Fig. 2 schematic view (vertical) of the screw seal structure of the present application.
Fig. 3 is a schematic view of an assembly diagram of the screw type seal structure of the present application.
Fig. 4 is a schematic structural view of an axial cross-sectional view of the spiral seal structure of the present application.
Fig. 5 is a schematic structural view of the seal seat of the present application.
FIG. 6 is a schematic structural view of an axial cross-sectional view of the seal seat of the present application.
Fig. 7 is a schematic structural view (vertical direction) of the spiral sealing ring of the present application.
Fig. 8 is a schematic structural view (transverse direction) of the spiral seal ring of the present application.
Fig. 9 is a schematic view of the construction of the ejector and sealing gasket of the present application in combination with a spiral seal.
Fig. 10 is a schematic view of a screw type sealing structure of the present application assembled in a compressor.
As shown in the attached drawings: 1. the bearing comprises a sealing seat, 11 parts of a mounting groove, 12 parts of a step groove, 13 parts of a bulge, 2 parts of a spiral sealing ring, 21 parts of a first annular boss, 22 parts of a second annular boss, 23 parts of a third annular boss, 24 parts of a groove, 3 parts of a sealing gasket, 4 parts of a pushing piece, 5 parts of a rotor shaft and 6 parts of a bearing.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only preferred embodiments, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention;
it is further to be noted that: when an element is referred to as being "secured to" (and other means included similarly to "being secured to") another element, it can be directly on the other element or intervening elements may also be present, secured by the intervening elements. When an element is referred to as being "connected" (and its equivalents are included as "connected") to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" (and other manners of "disposed on" that are similarly intended) another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1-4, the spiral sealing structure of the present application includes a sealing seat 1 and a spiral sealing ring 2, wherein an inner wall of the sealing seat 1 is provided with a mounting groove 11 (extending radially outward) and a step groove 12, the spiral sealing ring 2 is sleeved in the sealing seat 1, a sealing gasket 3 is arranged between the spiral sealing ring 2 and the step groove 12, and the sealing gasket 3 is used for sealing between the spiral sealing ring 2 and the sealing seat 1; the mounting groove 11 is internally provided with an ejection piece 4, and the ejection piece 4 is used for ejecting the spiral sealing ring 2 to be fixed in the sealing seat 1.
By adopting the structure, the split sealing structure is arranged, and the integral sealing structure is divided into the sealing seat and the spiral sealing ring, so that in the actual use process, if the sealing element is damaged, only corresponding failed parts need to be replaced, and the maintenance is more convenient; in addition, the split structure saves more materials and reduces the cost; and the sealing gasket is arranged for sealing, so that under the pressure action of the ejector, the ejector can be tightly sealed with the sealing seat and the spiral sealing ring which are mutually contacted, and the sealing effect of the integral sealing structure is improved.
The upper and lower portions of the present application are defined in the manner of arrangement shown in fig. 4.
As shown in fig. 3 and 5-6, the spiral seal ring 2 of the present application includes a seal ring body, the seal ring body is radially provided with a first annular boss 21, and an outer diameter of the first annular boss 21 is adapted to an inner diameter of the seal seat (i.e., the inner diameter of the seal seat ensures that the spiral seal ring provided with the first annular boss can be sleeved in and does not generate frictional interference with an inner wall of the seal seat); the ejector 4 is positioned on the upper surface of the first annular boss 21 and radially extends into the mounting groove 11; specifically, as shown in fig. 4, a part of the pushing member is arranged on the first annular boss, and a part of the pushing member extends into the mounting groove.
As shown in fig. 4, the stepped groove 12 of the present application is located below the mounting groove 11, the inner diameter of the stepped groove 12 is smaller than the outer diameter of the first annular boss 21 (i.e., the edge of the stepped groove protrudes more toward the radially inward center direction, and the first annular boss protrudes more toward the radially outward direction), and the sealing gasket 3 is located between the first annular boss 21 and the stepped groove 12, so that a gap is formed between the first annular boss 21 and the stepped groove 12 (the gap here mainly refers to a gap between the two in the axial direction, i.e., the two are not in contact in the axial direction); by adopting the structure, the pressing force of the first annular boss on the sealing washer can be always kept under the pressure action of the ejector, and the effective sealing between the spiral sealing ring and the sealing seat is realized; meanwhile, the gap between the first annular boss and the step groove is kept through the arrangement of the sealing washer, so that the sealing washer can be effectively protected from being in contact with the sealing seat to generate scratch and affect the sealing effect.
As shown in fig. 4 and 7, a second annular boss 22 is arranged on the seal ring body of the present application below the first annular boss 21, the outer diameter of the second annular boss 22 is larger than the inner diameter of the step groove 12 (close to the edge of the outer side wall of the seal ring body) and smaller than the outer diameter of the step groove 12 (close to the edge of the first annular boss), and the axial lower end surface of the second annular boss 22 abuts against the step groove 12; by adopting the structure, the fixing position between the sealing ring body and the sealing seat can be further stabilized.
As shown in fig. 1-4 and 7-10, the inner side wall of the thread sealing ring 2 according to the present invention is provided with a plurality of axially arranged grooves 24 (the grooves are located on the inner wall of the thread sealing ring body, and extend radially outward, and a plurality of grooves are provided along the axial direction, or may be in the form of grooves similar to threads), and a gap exists between the inner side wall of the thread sealing ring 2 and the rotor shaft 5 (i.e. the inner side wall of the thread sealing ring does not directly interfere with the rotor shaft, so that the thread sealing ring is stationary during the rotation of the rotor shaft); by adopting the structure, a gap is formed between the sealing ring and the rotor shaft, the spiral sealing piece is still when the main machine operates, and the rotor rotates at a high speed, so that the spiral sealing effect is achieved; and the arrangement of the groove can realize that oil gas is filled in the groove and the gap to form a liquid nut, thereby realizing effective sealing.
As shown in fig. 3-4 and 8, a third annular boss 23 is disposed on an upper surface of the first annular boss 21 in the axial direction, and a difference between an outer diameter of the third annular boss 23 and an outer diameter of the first annular boss 21 is smaller than a radial width of the ejector; the ejector is sleeved on the body of the threaded sealing ring and positioned outside the third annular boss, and the outer side wall of the third annular boss can be used for limiting the ejector so as to prevent the ejector from radially deviating; by adopting the structure, after the ejection piece is arranged in the mounting groove, under the support of the third annular boss, the ejection piece cannot generate radial deviation to cause the problem of uneven ejection force of each direction of the threaded sealing ring, and the problem of incapability of ejecting and fixing the threaded sealing ring due to large radial deviation cannot occur.
By way of example, the sealing gasket described herein is an O-ring, the diameter of which is greater than the axial thickness of the second annular boss; by adopting the structure, the O-shaped sealing ring can be sleeved on the outer side wall of the second annular boss, and the pressing force between the pushing piece and the step groove is combined, so that the O-shaped sealing ring is pressed and deformed to realize sealing.
The ejector is a wave spring or a snap spring; as an example, as shown in fig. 3 and 9, a wave spring is adopted, and the outer diameter of the wave spring is larger than that of the first annular boss, so that the spiral sealing ring is fixed in the sealing seat when being matched with the mounting groove; in addition, as shown in fig. 3 and 9, the wave spring adopted by the embodiment is not of a closed structure and is provided with a gap, so that the wave spring is convenient to mount and dismount.
By way of example, the threaded seal ring described herein is a threaded seal ring made of copper or aluminum, and the seal seat is a seal seat made of carbon steel. By adopting the structure, the whole sealing structure is not required to be completely made of copper materials, so that the cost is effectively saved.
As shown in fig. 10, the present application also provides, as an example, an oil-free compressor including the above-described screw type seal structure.
The spiral sealing structure comprises four parts, namely a sealing seat, a spiral sealing ring, a sealing washer and a pushing piece, wherein the spiral sealing ring is made of copper or aluminum, the sealing seat is made of carbon steel, the spiral sealing ring is arranged in the sealing seat, and the sealing seat is in clearance fit with the spiral sealing ring; the sealing washer is arranged on the second annular boss on the spiral sealing ring, and the ejector piece is arranged in the mounting groove of the sealing seat to fix the spiral sealing ring in the sealing seat; wherein, the inner wall of the spiral sealing ring is provided with a plurality of grooves, and a gap is formed between the spiral sealing ring and the rotor shaft; when the main machine runs, the spiral sealing element is still, and the rotor rotates at a high speed, so that the spiral sealing effect is achieved; the structure of this application has realized following beneficial effect: the split sealing structure can reduce the use of brass and reduce the cost, the spiral sealing ring made of copper or aluminum is arranged in the sealing seat and is not easy to wear, and only invalid parts need to be replaced when the sealing element is damaged, so that the maintenance is convenient; sealing by the sealing washer can protect the brass sealing ring from being scratched when the brass sealing ring is contacted with the sealing seat.
Claims (10)
1. A spiral seal structure, its characterized in that: the structure comprises a sealing seat and a spiral sealing ring, wherein the inner wall of the sealing seat is provided with a mounting groove and a step groove, the spiral sealing ring is sleeved in the sealing seat, a sealing gasket is arranged between the spiral sealing ring and the step groove, and the sealing gasket is used for sealing between the spiral sealing ring and the sealing seat; and the mounting groove is internally provided with an ejecting piece which is used for ejecting the spiral sealing ring to be fixed in the sealing seat.
2. The spiral seal structure of claim 1, wherein: the spiral sealing ring comprises a sealing ring body, a first annular boss is radially arranged on the sealing ring body, and the outer diameter of the first annular boss is matched with the inner diameter of the sealing seat; the ejector is positioned on the upper surface of the first annular boss and radially extends into the mounting groove.
3. The spiral seal structure of claim 2, wherein: the step groove is positioned below the mounting groove, the inner diameter of the step groove is smaller than the outer diameter of the first annular boss, and the sealing washer is positioned between the first annular boss and the step groove and enables a gap to be reserved between the first annular boss and the step groove.
4. The spiral seal structure of claim 2, wherein: the sealing ring body is provided with a second annular boss below the first annular boss, the outer diameter of the second annular boss is larger than the inner diameter of the step groove and smaller than the outer diameter of the step groove, and the axial lower end face of the second annular boss is abutted against the step groove.
5. The spiral seal structure of claim 1, wherein: the inner side wall of the spiral sealing ring is provided with a plurality of grooves which are axially arranged, and a gap exists between the inner side wall of the spiral sealing ring and the rotor shaft.
6. The spiral seal structure of claim 2, wherein: the upper surface of the first annular boss in the axial direction is provided with a third annular boss, and the difference between the outer diameter of the third annular boss and the outer diameter of the first annular boss is smaller than the radial width of the ejector.
7. The spiral seal structure of claim 2, wherein: the sealing washer is an O-shaped sealing washer, and the diameter of the O-shaped sealing washer is larger than the axial thickness of the second annular boss.
8. The spiral seal structure of claim 2, wherein: the ejection piece is a wave spring or a snap spring.
9. The spiral seal structure of claim 2, wherein: the spiral sealing ring is made of copper or aluminum, and the sealing seat is made of carbon steel; the sealing seat is provided with bulges on one axial end face, the four bulges are uniformly distributed on the axial end face, and the axial end face is the end face close to the end where the ejector piece is located.
10. An oil-free compressor, characterized in that: an oil-free compressor comprising a screw type seal structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220455731.5U CN217354750U (en) | 2022-03-03 | 2022-03-03 | Spiral sealing structure and oil-free compressor comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220455731.5U CN217354750U (en) | 2022-03-03 | 2022-03-03 | Spiral sealing structure and oil-free compressor comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217354750U true CN217354750U (en) | 2022-09-02 |
Family
ID=83050603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220455731.5U Active CN217354750U (en) | 2022-03-03 | 2022-03-03 | Spiral sealing structure and oil-free compressor comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217354750U (en) |
-
2022
- 2022-03-03 CN CN202220455731.5U patent/CN217354750U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5577297B2 (en) | Scroll type fluid machine | |
| CA2746726C (en) | Pump seal | |
| JP5183938B2 (en) | Sealing device | |
| JP2012087892A (en) | Liquid seal, shaft seal apparatus and pump apparatus using the same | |
| CN217354750U (en) | Spiral sealing structure and oil-free compressor comprising same | |
| CA2750744A1 (en) | Pressure resistant static and dynamic expeller shaft sealing | |
| US20130228978A1 (en) | Sealing device and sealing structure | |
| CN117833536A (en) | Motor shaft sealing structure and motor | |
| JP5797264B2 (en) | mechanical seal | |
| US4456314A (en) | Device for locking the inner ring of a rolling bearing on a rotary shaft | |
| CN105782414B (en) | A kind of comprehensive self-cooled gland seal system | |
| JP5066787B2 (en) | Sealing structure | |
| CN112128097A (en) | Integrated mechanical seal for industrial cam rotor pump | |
| CN104487744A (en) | Mechanical seal device | |
| JP2002235856A (en) | Sealing device | |
| CN112682309B (en) | Roots pump sealing structure capable of effectively reducing leakage of lubricating oil to cavity | |
| JP2016084819A (en) | Scroll type fluid machine | |
| CN210889326U (en) | Pumping device, rotary compressor and refrigeration equipment | |
| CN205605786U (en) | Synthesize self -cooled gland seal system | |
| CN108679165B (en) | Small-size reduction gearbox | |
| JP2017044123A (en) | Screw compressor | |
| JP2003113946A (en) | Shaft sealing device | |
| CN221240195U (en) | Pressure-bearing sealing structure and motor | |
| JP3945661B2 (en) | Sealing device for rotation | |
| CN111895095A (en) | Seal assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |