CN117780609A - Self-locking membrane head and compressor - Google Patents
Self-locking membrane head and compressor Download PDFInfo
- Publication number
- CN117780609A CN117780609A CN202311850846.XA CN202311850846A CN117780609A CN 117780609 A CN117780609 A CN 117780609A CN 202311850846 A CN202311850846 A CN 202311850846A CN 117780609 A CN117780609 A CN 117780609A
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- membrane head
- locking
- head
- side membrane
- oil
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- 239000012528 membrane Substances 0.000 title claims abstract description 219
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000036316 preload Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 59
- 239000007789 gas Substances 0.000 description 31
- 241000446313 Lamella Species 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a self-locking membrane head and a compressor, and particularly relates to the technical field of membrane compressors. The self-locking membrane head comprises an air side membrane head, an oil side membrane head and a locking mechanism; the oil side membrane head and the air side membrane head are arranged oppositely; the locking mechanism surrounds and hugs tightly on the air side membrane head and the oil side membrane head so as to lock and fix the air side membrane head and the oil side membrane head. The invention improves the mounting structure of the compressor cylinder body, can realize the amplification of locking force by adjusting the locking mechanism, greatly reduces the required pretightening force and effectively enhances the sealing reliability of the diaphragm; in addition, the invention greatly reduces the size of the membrane head and the manufacturing cost.
Description
Technical Field
The invention relates to the technical field of diaphragm compressors, in particular to a self-locking type diaphragm head and a compressor.
Background
The diaphragm compressor is a positive displacement compressor, and has the advantages of good sealing performance, wide pressure range and large compression ratio, so the diaphragm compressor is widely applied to compression conveying of various high-purity gases, noble rare gases, toxic and harmful gases and corrosive gases in petrochemical fields such as hydrogenation stations and the like.
The membrane head main body of the membrane compressor consists of an air side membrane head, an oil side membrane head and a membrane, wherein the membrane is clamped between the air side membrane head and the oil side membrane head, and the air side membrane head, the oil side membrane head and the membrane are detachably connected together through bolts. The peripheral part of the diaphragm is fixed by the oil side film head and the air side film head, and the middle part forms an oil side film cavity and an air side film cavity with the oil side film head and the air side film head respectively. The oil side membrane cavity is filled with hydraulic oil, and the air side membrane cavity is filled with compressed working medium. The piston pushes hydraulic oil in the oil side membrane cavity, so that the diaphragm is driven to deform to compress the air side membrane cavity to compress working media. The compression working medium and the hydraulic oil of the diaphragm compressor are separated by the diaphragm, and static seal is arranged between the diaphragm and the oil-gas side diaphragm head, so that the purity and sealing performance of the compressed working medium can be ensured.
For a large-diameter diaphragm compressor and a high-pressure diaphragm compressor, the oil-gas pressure action area is large, the oil-gas pressure is high, and the required bolt pretightening force is particularly large. The air side membrane head and the oil side membrane head of the existing diaphragm compressor are generally required to be provided with 20-30 bolts, the specification of the bolts is also generally above M27, and the bolts of the high-pressure diaphragm compressor even need M42 or M48. The number of bolts is large, and the required pretightening force is large, so that the disassembly and assembly process of the diaphragm compressor requires long time and a large amount of manpower, and the operation and maintenance cost is increased. For a high-pressure diaphragm compressor, the cost required by a plurality of large-diameter bolts is high, and the plane sealing at the diaphragm at high pressure is difficult to ensure.
Disclosure of Invention
The invention mainly aims to provide a self-locking membrane head and a compressor, which aim to reduce the total pretightening force required when the gas side membrane head and the oil side membrane head are assembled, reduce the number of bolts and the size of the bolts, and ensure the reliability of membrane sealing at high pressure.
In order to achieve the above object, the present invention provides a self-locking type membrane head, comprising:
an air side membrane head;
an oil side membrane head arranged opposite to the gas side membrane head; and
the locking mechanism surrounds and hugs tightly on the air side membrane head and the oil side membrane head so as to lock and fix the air side membrane head and the oil side membrane head.
Optionally, the locking mechanical system includes first lock lamella, second lock lamella and connecting piece, the air side membrane head with the first group membrane head body of oil side membrane head, the membrane head body has relative first side and the second side that sets up, first lock lamella is embraced tightly on the first side of membrane head body, second lock lamella is embraced tightly on the second side of membrane head body, first lock lamella with the second lock lamella passes through the connecting piece can dismantle the connection.
Optionally, one of the two contact surfaces at the joint of the first locking lobe and the air side membrane head is an inclined surface, and the other is an arc surface; and/or
One of two contact surfaces at the joint of the first lock valve and the oil side membrane head is an inclined surface, and the other is an arc surface; and/or
One of two contact surfaces at the joint of the second lock valve and the air side membrane head is an inclined surface, and the other is an arc surface; and/or
One of the two contact surfaces at the joint of the second lock valve and the oil side membrane head is an inclined surface, and the other is an arc surface.
Optionally, the self-locking membrane head further comprises a membrane, the air side membrane head is concavely provided with an air cavity, the oil side membrane head is concavely provided with an oil cavity, and the membrane is clamped between the air side membrane head and the oil side membrane head and separates the air cavity from the oil cavity.
Optionally, the locking mechanism further comprises locking rings, wherein the locking rings respectively clamp the edges of the diaphragms and are clamped between the air side membrane head and the oil side membrane head.
Optionally, the locking ring is in a T shape or a cone shape, and an accommodating opening for accommodating the locking ring is formed in the peripheral wall of the membrane head body.
Optionally, a contact surface of the lock ring abutting against the membrane head body comprises at least one arc surface.
Optionally, the connecting piece is a bolt.
Optionally, the angle of the inclined plane is alpha, and the required total pretightening force is 0.64tan alpha times of the compacting force between the oil side membrane head and the air side membrane head.
In order to achieve the above object, the present invention further provides a compressor, including the self-locking membrane head as described above, the self-locking membrane head comprising:
an air side membrane head;
an oil side membrane head arranged opposite to the gas side membrane head; and
the locking mechanism surrounds and hugs tightly on the air side membrane head and the oil side membrane head so as to lock and fix the air side membrane head and the oil side membrane head.
In the technical scheme of the invention, the self-locking membrane head comprises a gas side membrane head, an oil side membrane head and a locking mechanism; the oil side membrane head and the air side membrane head are arranged oppositely; the locking mechanism surrounds and hugs tightly on the air side membrane head and the oil side membrane head so as to lock and fix the air side membrane head and the oil side membrane head. It can be understood that the invention improves the mounting structure of the compressor cylinder body, locks the oil side membrane head and the gas side membrane head by arranging the locking mechanism, greatly reduces the number of bolts and the size of the bolts, effectively reduces the total pretightening force required when the gas side membrane head and the oil side membrane head are assembled, and can ensure the reliability of the membrane seal at high pressure.
In addition, in the present invention, since there is no need to provide an axial tension bolt, there is no need to provide a bolt mounting hole for the oil-side membrane head and the gas-side membrane head, and the oil-side membrane head and the gas-side membrane head only need to be set equal to the membrane diameter in diameter or length. Compared with the traditional structure, the film head body has greatly reduced diameter or length, and correspondingly, the thickness of the film head can be reduced on the basis of keeping the same thickness-diameter ratio of the film head, thereby being beneficial to reducing the overall size of the film head body and reducing the manufacturing cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a self-locking film head according to an embodiment of the present invention;
FIG. 2 is a schematic view of a locking mechanism in one embodiment of a self-locking film head of the present invention;
FIG. 3 is an enlarged view of the contact between the first locking lobe and the air-side membrane head in an embodiment of the self-locking membrane head of the present invention;
FIG. 4 is a diagram illustrating an overall force analysis of one embodiment of a self-locking membrane head according to the present invention;
FIG. 5 is a force analysis diagram of a first locking segment in an embodiment of a self-locking film head according to the present invention;
fig. 6 is a second force analysis chart of the first locking lobe in the first embodiment of the self-locking film head of the present invention.
Reference numerals illustrate:
10. an air side membrane head; 20. an oil side membrane head; 30. a locking mechanism; 40. a membrane; 31. a first locking lobe; 32. a second locking lobe; 33. a connecting piece; 34. a locking ring.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1 to 3, in one embodiment of the present invention, the self-locking membrane head includes a gas side membrane head 10, an oil side membrane head 20, a locking mechanism 30, and a membrane 40; the oil side membrane head 20 is arranged opposite to the gas side membrane head 10; the locking mechanism 30 is tightly wrapped around the air side membrane head 10 and the oil side membrane head 20 to lock and fix the air side membrane head 10 and the oil side membrane head 20.
The air-side membrane head 10 is concavely provided with an air cavity, the oil-side membrane head 20 is concavely provided with an oil cavity, and the membrane 40 is sandwiched between the air-side membrane head 10 and the oil-side membrane head 20 and separates the air cavity and the oil cavity.
In this embodiment, the locking mechanism 30 may be a hoop structure or a clamping structure, and the specific structure is not limited thereto.
It can be appreciated that the present invention improves the mounting structure of the compressor cylinder, and by providing the locking mechanism 30 to lock the oil side membrane head 20 and the gas side membrane head 10, the number of bolts and the size of the bolts are greatly reduced, the total pretightening force required when the gas side membrane head 10 and the oil side membrane head 20 are assembled is effectively reduced, and the reliability of the sealing of the diaphragm 40 at high pressure can be ensured.
In addition, in the present invention, since there is no need to provide an axial tension bolt, there is no need to provide a bolt mounting hole in the oil side membrane head 20 and the gas side membrane head 10, and the oil side membrane head 20 and the gas side membrane head 10 only need to be set to be equal in diameter or length to the membrane 40. Compared with the traditional structure, the film head body has greatly reduced diameter or length, and correspondingly, the thickness of the film head can be reduced on the basis of keeping the same thickness-diameter ratio of the film head, thereby being beneficial to reducing the overall size of the film head body and reducing the manufacturing cost.
To improve the convenience of assembly and further reduce the number of bolts and the size of the bolts, and reduce the manufacturing cost, in an embodiment, the locking mechanism 30 may include a first locking tab 31, a second locking tab 32, and a connecting member 33, where the air-side membrane head 10 and the oil-side membrane head 20 form a membrane head body, the membrane head body has a first side and a second side that are disposed opposite to each other, the first locking tab 31 is tightly held on the first side of the membrane head body, the second locking tab 32 is tightly held on the second side of the membrane head body, and the first locking tab 31 and the second locking tab 32 are detachably connected through the connecting member 33. The connection member 33 may be a bolt, a screw, or the like, but is not limited thereto.
In this embodiment, the air side membrane head 10 and the oil side membrane head 20 are tightly held and fixed by two locking petals, and the two locking petals can be locked by connecting pieces 33 such as bolts which are transversely arranged, so that the assembly is more convenient, the number of bolts is less, and the size is smaller.
Further, in order to reduce the friction between the lock lobe and the film head body, in this embodiment, one of the two contact surfaces where the first lock lobe 31 abuts against the air side film head 10 is set as an inclined surface, and the other is set as an arc surface; one of the two contact surfaces of the first lock valve 31, which is abutted with the oil side membrane head 20, is provided with an inclined surface, and the other is provided with an arc surface; one of the two contact surfaces of the second lock valve 32, which is abutted with the air side membrane head 10, is provided with an inclined surface, and the other is provided with an arc surface; one of the two contact surfaces of the second lock lobe 32, which is abutted against the oil side membrane head 20, is provided as an inclined surface, and the other is provided as an arc surface.
That is, the contact part of the two lock petals and the membrane head body is characterized in that one part is an inclined plane, and the other part is an arc surface, so that the two parts are in line contact. Preferably, the first locking clack 31 and the second locking clack 32 are both semicircular structures, the two locking clacks are fixedly connected through a tensioning bolt, and the locking clacks exert a pressing force on the membrane head body through an inclined plane contacted with the membrane head body when being tensioned and fixed, so that the oil side membrane head 20 and the air side membrane head 10 are locked and fixed.
In this embodiment, as shown in fig. 3, the contact portions of the oil side membrane head 20 and the gas side membrane head 10 with the lock lobes are inclined surfaces, the lock lobes are cambered surfaces, and the included angle between the inclined surfaces and the horizontal direction is α.
Define the total bolt pretightening force required by the membrane head structure of the traditional membrane compressor as F o I.e. the total required hold-down force between the oil side membrane head 20 and the gas side membrane head 10 is F o . For the present invention, as shown in fig. 4 to 6, the force analysis of the membrane head body shows that the inclined surface angles of the contact portions of the oil side membrane head 20 and the gas side membrane head 10 with the lock petals are alpha, and the pressure applied by each lock petal to the gas side membrane head 10 and the oil side membrane head 20 is F N To ensure that the oil side membrane head 20 and the gas side membrane head 10 have sufficient pressing force, it is necessary to satisfy:
F o ＝2F N cosα
wherein each lock lobe is also subjected to an oil side filmReaction force F of head 20 and air-side film head 10 N The lateral component of the two forces is:
the total lateral component force to which each lock lobe is subjected is therefore:
F transverse bar ＝F Transverse 1 +F Transverse 2 ＝F o tanα
Because the lock valve is pulled by the bolt, the axial component force of the upper part and the lower part of the lock valve are balanced, and the bolt pretightening force only needs to resist the transverse component force of the lock valve. The lock valve is of a semicircular structure, and the transverse component force is uniformly distributed in the circumferential direction. When the lock valve is in a stress balance state, the following conditions are satisfied:
F pre-preparation ＝0.64F Transverse bar ＝0.64tanαF o
In this structure, the total preload required is only 0.64tan α times the total preload of the conventional membrane head structure. For example, when α is designed to be 10 °, the total pretightening force required is only 0.12 times that of the conventional membrane head structure, and the total pretightening force is reduced by 8 times, and it is obvious that the structural design of the present invention can greatly reduce the number and size of bolts.
To further enhance the sealing reliability of the diaphragm 40, referring to fig. 1 to 4, in an embodiment, the locking mechanism 30 may further include locking rings 34, the locking rings 34 respectively clamping the edges of the diaphragm 40 and being interposed between the gas side membrane head 10 and the oil side membrane head 20.
In this embodiment, the lock ring 34 is T-shaped, tapered, or the like, but is not limited thereto. Correspondingly, the peripheral wall of the membrane head body is provided with a containing opening for containing the locking ring 34, so that the locking ring 34 is clamped in the containing opening, the membrane 40 is better fixed, the reliability of the installation of the membrane 40 is improved, and the sealing performance of the membrane is improved.
Further, as shown in fig. 3, the contact surface of the lock ring 34 abutting against the membrane head body may include at least one arc surface.
Preferably, the contact surface of the locking ring 34 abutting against the membrane head body may comprise two arc surfaces which are mutually connected and have different curvatures. It will be appreciated that by providing the lock ring 34 around the periphery of the diaphragm 40, and placing the edge of the diaphragm 40 in the lock ring 34, the seal between the diaphragm 40 and the oil side membrane head 20 and the gas side membrane head 10 can be converted into a seal between the lock ring 34 and the oil side membrane head 20 and the gas side membrane head 10. Since the contact portions of the lock ring 34 and the oil side membrane head 20 and the gas side membrane head 10 are two circular arc surfaces with different curvatures, the lock ring 34 is in line contact with the oil side membrane head 20 and the gas side membrane head 10, and the planar seal between the diaphragm 40 and the oil side membrane head 20 and the gas side membrane head 10 can be converted into the line seal between the lock ring 34 and the oil side membrane head 20 and the gas side membrane head 10. In this manner, the sealing reliability of diaphragm 40 is greatly enhanced.
The invention also provides a compressor which comprises the self-locking membrane head, and the specific structure of the self-locking membrane head refers to the embodiment, and as the compressor comprises all the schemes of all the embodiments of the self-locking membrane head, the compressor at least has the same technical effects as the self-locking membrane head, and the technical effects are not described herein.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. A self-locking membrane head, comprising:
an air side membrane head;
an oil side membrane head arranged opposite to the gas side membrane head; and
the locking mechanism surrounds and hugs tightly on the air side membrane head and the oil side membrane head so as to lock and fix the air side membrane head and the oil side membrane head.
2. The self-locking membrane head of claim 1, wherein the locking mechanism comprises a first locking flap, a second locking flap and a connecting piece, the gas side membrane head and the oil side membrane head form a membrane head body, the membrane head body has a first side and a second side which are oppositely arranged, the first locking flap is held tightly on the first side of the membrane head body, the second locking flap is held tightly on the second side of the membrane head body, and the first locking flap and the second locking flap are detachably connected through the connecting piece.
3. The self-locking membrane head according to claim 2, wherein one of two contact surfaces at the abutting part of the first locking lobe and the gas side membrane head is an inclined surface, and the other is an arc surface; and/or
One of two contact surfaces at the joint of the first lock valve and the oil side membrane head is an inclined surface, and the other is an arc surface; and/or
One of two contact surfaces at the joint of the second lock valve and the air side membrane head is an inclined surface, and the other is an arc surface; and/or
One of the two contact surfaces at the joint of the second lock valve and the oil side membrane head is an inclined surface, and the other is an arc surface.
4. The self-locking membrane head of claim 2, further comprising a membrane, wherein the air side membrane head is concavely provided with an air cavity, the oil side membrane head is concavely provided with an oil cavity, and the membrane is sandwiched between the air side membrane head and the oil side membrane head and separates the air cavity and the oil cavity.
5. The self-locking membrane head of claim 4, wherein the locking mechanism further comprises locking rings that respectively clamp the edges of the membrane and are interposed between the gas side membrane head and the oil side membrane head.
6. The self-locking membrane head according to claim 5, wherein the locking ring is in a T shape or a cone shape, and a receiving opening for receiving the locking ring is formed in the peripheral wall of the membrane head body.
7. The self-locking membrane head according to claim 5, wherein the contact surface of the locking ring abutting against the membrane head body comprises at least one arc surface.
8. A self-locking membrane head according to claim 3, wherein the connecting member is a bolt.
9. The self-locking membrane head of claim 8, wherein the bevel angle is α and the total preload force required is 0.64tan α times the compression force between the oil side membrane head and the gas side membrane head.
10. A compressor comprising a self-locking membrane head according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311850846.XA CN117780609A (en) | 2023-12-29 | 2023-12-29 | Self-locking membrane head and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311850846.XA CN117780609A (en) | 2023-12-29 | 2023-12-29 | Self-locking membrane head and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117780609A true CN117780609A (en) | 2024-03-29 |
Family
ID=90392589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311850846.XA Pending CN117780609A (en) | 2023-12-29 | 2023-12-29 | Self-locking membrane head and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117780609A (en) |
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2023
- 2023-12-29 CN CN202311850846.XA patent/CN117780609A/en active Pending
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