CN109538451A - The hydraulic guiding of super-pressure diaphragm type compressor seals film head - Google Patents
The hydraulic guiding of super-pressure diaphragm type compressor seals film head Download PDFInfo
- Publication number
- CN109538451A CN109538451A CN201910031241.5A CN201910031241A CN109538451A CN 109538451 A CN109538451 A CN 109538451A CN 201910031241 A CN201910031241 A CN 201910031241A CN 109538451 A CN109538451 A CN 109538451A
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- Prior art keywords
- oil
- cylinder cap
- pressure
- film head
- diaphragm
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 description 51
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000036316 preload Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/125—Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a kind of hydraulic guidings of super-pressure diaphragm type compressor to seal film head, including cylinder cap, diaphragm, oil distribution casing and cylinder body, further includes stuffing box and the main nut that matches with stuffing box；The cylinder body is inverted "convex" shape, is matched with filler lower box part；The groove for accommodating oil distribution casing and diaphragm is equipped on cylinder body top, the depth of groove is less than the sum of oil distribution casing and the height of diaphragm；It is equipped with oil duct at the middle part of cylinder body, plunger is equipped in oil duct, plunger is connected with the crankshaft of compressor；The cylinder cap is equipped with air flue, and air flue is connected with air entry and exhaust outlet respectively, and air flue lower ending opening is below cylinder cap；It is additionally provided with pressure oil-in in cylinder cap side, cylinder cap and main nut, which cooperate, above cylinder cap is equipped with pressure oil export at gap, pressure oil-in is connected with pressure oil export；Sealing ring is equipped at cylinder cap and main nut cooperation gap.Solve the problems, such as that the uniform assembly of bolt difficult arrangement, unbalance stress is more complex in the prior art.
Description
Technical field
The invention belongs to compressor arrangement technical fields, and in particular to a kind of hydraulic guiding of super-pressure diaphragm type compressor is close
Sealer head.
Background technique
The film head of existing diaphragm type compressor be mainly made of cylinder cap, diaphragm, oil distribution casing, cylinder body, bolt 12 etc. (such as Fig. 1,
Shown in Fig. 2).Film head is sealed using tools for bolts ' pretension, and cylinder cap and oil distribution casing are pressed from both sides diaphragm with higher pretightning force by bolt arrangement
In centre.In compressor operation in order to guarantee that compressed gas empties completely, hydraulic oil lateral pressure needs higher than gas side pressure
10%-20%, when pressure at expulsion is higher, there are higher hydraulic pressures between diaphragm and cylinder body.According to sealing principle, in order to protect
Card film head is not revealed, and the pretightning force on bolt not only needs to offset high pressure gas and high pressure oil to cylinder cap, diaphragm, oil distribution casing
The separating force of generation, it is also necessary to guarantee that each sealing surface can generate enough flexible deformations, so that the small peak valley quilt of seal clearance
It flattens, gas is made not have enough channels of leaking.
Super-high pressure compressor refers to that air pressure, oil pressure all reach the diaphragm type compressor of 100Mpa or more, super-high pressure compressor
Due to pressure height, required pretightning force will also be accordingly increased, if using traditional film header structure, it will following technology occur and ask
Topic:
1. bolt difficult arrangement: for the pretightning force needed for meeting, the quantity of bolt will increase, and specification is larger.When bolt is excessive,
The diameter of cylinder cap certainly will be needed to expand, in order to guarantee to have enough rigidity after diameter increase, cylinder cap thickness is also required to increase, make
Film head is heavy, the problems such as difficult waste of material, maintenance, space hold will be generated, in some instances it may even be possible to because required bolt is excessive
It can not arrange at all.
2. discontinuity: using bolt fastening, it is larger to inevitably result in fastening force at bolt location, and bolt and bolt
Intermediate region fastening force it is smaller, cause to need bigger pretightning force to compensate it when design, increase design difficulty.Using
When more bolt fastenings, because that can not pre-tighten simultaneously, fastening force cannot be guaranteed identical on every bolt, part will be caused to pre-tighten excessive
Or it is insufficient, hidden danger is brought to compressor safe operation.
3. assembling more complex: traditional design, bolt quantity is more, and pretightning force is larger, to guarantee that pretightning force is as uniform as possible,
It needs in certain sequence, to pre-tighten that process is relatively complicated, and large labor intensity may also need hydraulic to suppress the spies such as tool when assembling and disassembling bolt
Different tooling could be installed, so that assembly time is longer, increase time between overhauls(TBO) and use cost.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic guidings of super-pressure diaphragm type compressor to seal film head, existing to solve
The problems in technology.
The technical scheme is that a kind of hydraulic guiding of diaphragm type compressor seals film head, including cylinder cap, diaphragm, match
Food tray and cylinder body, it is characterised in that: further include stuffing box for receiving above-mentioned component and the main spiral shell matched with stuffing box
It is female；The cylinder body is inverted "convex" shape, is matched with filler lower box part；It is equipped on cylinder body top and accommodates oil distribution casing and diaphragm
The depth of groove, groove is less than the sum of oil distribution casing and the height of diaphragm；It is equipped with oil duct at the middle part of cylinder body, column is equipped in oil duct
Plug, plunger are connected with the crankshaft of compressor；The cylinder cap is equipped with air flue, and air flue is connected with air entry and exhaust outlet respectively
Logical, air flue lower ending opening is below cylinder cap；It is additionally provided with pressure oil-in in cylinder cap side, cylinder cap is matched with main nut above cylinder cap
Pressure oil export is equipped at joint close gap, pressure oil-in is connected with pressure oil export；At cylinder cap and main nut cooperation gap
Equipped with sealing ring.
It is further: opening is equipped with below stuffing box.
It is further: the flange matched with body is equipped with below stuffing box.
It is further: the opening matched with air entry, exhaust outlet, pressure oil-in is respectively equipped on stuffing box.
It is further: to be equipped with inlet valve at air entry, be equipped with exhaust valve in exhaust ports.
Compared with conventional film head, the beneficial effect of guiding sealing film head is:
1, the sealed pressure of guiding sealing film head can meet the preload of superelevation press mold head by the oil pressure cntrol being injected into gap
Force request breaches and brings the limitation to the design of film head because of high pretightening force, and controls flexible.In the variable element for encountering compressor
Operation, Transformation of Unit etc. have very strong superiority when needing to change the case where film head pretightning force (traditional structure is limited by bolt material
The working strength of material is difficult to improve the pretightning force of original film head).
2, the stuffing box hydraulic fixing of guiding sealing film head tubular replaces the bolt arrangement of conventional film head, to space
Occupancy be substantially reduced, meet the compact-sized design style of diaphragm type compressor.As shown in figure 3, two kinds of film heads of identical parameters,
Guiding seals film head and is reduced by about 30% than conventional film head volume.
The pretightning force of conventional film head is applied by bolt, under the premise of guaranteeing that material is not destroyed, what bolt can apply
Maximum pretightning force, the minimum sectional area (such as Fig. 3) depending on bolt.And " the guidance pressure that guiding sealing film head passes through hydraulic oil
Power " applies pretightning force, and the maximum pretightning force applied depends on the annular cross-sectional area of stuffing box, the annular cross-sectional area ratio of stuffing box
The smallest cross-section area of bolt is much higher to the utilization rate in space, and namely guiding seals the lesser key of film head body product for this.
3, the used bolt specification of conventional film head is bigger, and the distance between bolt and sealing surface are remoter, and cylinder cap just needs more
Big thickness guarantees that it has enough intensity, and the guide pressure of guiding sealing film head is applied to forever right above cylinder cap,
The thickness of cylinder cap and main nut need to only meet relevant pressure grade, will not add additional thickness because of reasons in structure.Into one
Step saves space and material.
4, when film head uses bolt fastening, in super-pressure, the specification of bolt is usually larger, is needed at this time using liquid
Nut is pressed, is fastened by suppressing tool.It, need to be first by each spiral shell in assembling process in order to guarantee sealing surface uniform force
After bolt is packed into bolt hole, according to sequence is specifically tightened, divide four-wheel to hydraulic spiral shell with 10%, 40%, 70%, 100% pressure of suppressing
Mother suppresses, and every wheel is spaced 1 hour, and installation effectiveness is extremely low, and guiding is used to seal film head, it is only necessary to first twist main nut
After upper (being not required to any pretightning force, be screwed to suitable position), the hydraulic oil system of external oil pump or molding machine itself is connected, only
Need once mounting with regard to achievable.It is time saving and energy saving, and sealing surface stress is more more uniform than conventional film, and sealing effect is more preferably.
Detailed description of the invention
Fig. 1 is existing structure schematic diagram；
Fig. 2 is existing structure broken section total figure；
Fig. 3 is structure of the invention assembling schematic diagram；
Fig. 4 is schematic structural cross-sectional view of the invention；
Fig. 5 is structure of the invention and existing structure pressure area contrast schematic diagram；
Fig. 6 is structure of the invention and existing structure volume vs schematic diagram.
Number explanation in figure: 1 be main nut, 2 be sealing ring, 3 be stuffing box, 4 be cylinder cap, 5 be diaphragm, 6 be oil distribution casing,
7 it is cylinder body, 8 be plunger, 9 be pressure oil-in, 10 be air entry, 11 be exhaust outlet, 12 is bolt.
Specific embodiment
Film head, including cylinder cap 4, diaphragm are sealed as shown in figures 1 to 6 for the hydraulic guiding of super-pressure diaphragm type compressor of the present invention
5, oil distribution casing 6 and cylinder body 7, the structure and function of above-mentioned component with it is existing essentially identical；It further include for receiving above-mentioned component
Stuffing box 3 and the main nut 1 for each component in hitch box matched with stuffing box；It is from top to bottom cylinder respectively in stuffing box
Lid, diaphragm, oil distribution casing and cylinder body, the cylinder body are inverted "convex" shape, match with the limiting stand of filler lower box part, play limit
The effect of position；The groove for accommodating oil distribution casing and diaphragm is equipped on cylinder body top, groove plays the role of accommodating above-mentioned component, to prevent
Only above-mentioned component is displaced radially, and depth is greater than the height of oil distribution casing and is less than the sum of oil distribution casing and the height of diaphragm；
Meanwhile the space (namely whole space) of groove part is separated into two parts by diaphragm, top is air chamber, and lower part is oil
Chamber；It is equipped with the oil duct being connected with oil pocket at the middle part of cylinder body, plunger 8, the crankshaft phase of plunger and compressor are equipped in oil duct
Connection, similar piston is the same, moves back and forth in oil duct under the drive of crankshaft, to realize the variation of oil pressure；The cylinder cap
It is equipped with air flue, air flue is respectively communicated with air chamber and cylinder air entry 10, air chamber and cylinder exhaust port 11, air flue lower ending opening
It below cylinder cap, matches, i.e., is connected with air chamber with diaphragm；It is additionally provided with pressure oil-in 9 in cylinder cap side, passes through oil
Pipe is connected with host or oil pump, can also be connected with oil pocket；It is equipped with pressure oil export in the top of cylinder cap, outlet is located at cylinder cap
At gap between main nut mating surface, pressure oil-in is connected with pressure oil export by oil duct；In cylinder cap and main spiral shell
Mother's cooperation is equipped with sealing ring 2 at gap, and sealing ring outer is matched with stuffing box, and top is matched with main nut, lower part and cylinder
Mates, when pressure oil enters in gap from pressure oil-in, under the action of oil pressure, cylinder body moves very little to end
Distance, sealing ring ensure that oil therein does not overflow, to persistently generate downward pressure to cylinder body.
It is preferred: opening to be equipped with below stuffing box, so that plunger is connected with the crankshaft of body.
It is preferred: the flange matched with body to be equipped with below stuffing box, stuffing box is connected by flange with body.
It is preferred: the opening matched with air entry, exhaust outlet, pressure oil-in etc. to be respectively equipped on stuffing box, with reality
Existing corresponding component and external connection.
It is preferred: to be equipped with inlet valve at air entry, be equipped with exhaust valve in exhaust ports.
The course of work of the invention is as follows: stuffing box being screwed on body, plunger is connect with crankshaft, by cylinder body, is matched
Food tray, diaphragm and cylinder cap are sequentially loaded into inside stuffing box, and main nut is screwed in, and are fastened and are locked, then install connection corresponding component
?.Simple and convenient, high-efficient, good reliability is installed.
When in use, when crankshaft drives plunger operation, when oil pocket high pressure, also there is high pressure oil entrance in pressure oil-in, and
Pressure is identical as the pressure of oil pocket, to make sealed reliable.
In the present solution, used be sealed into guiding sealing, guiding sealing is also low into formula structure, and guidance field can
To be arranged in below cylinder body, guide pressure will pass through the transmitting of cylinder body and oil distribution casing, pretightning force is applied on diaphragm formed it is close
Envelope, the structure can reach same effect.
The beneficial effects of the present invention are: diaphragm type compressor film header structure of the invention (diaphragm type compressor film head, hereinafter referred to as
Film head), conventional film header structure is avoided more under super-pressure operating condition, the use of big sized bolt, to reduce film head body
Product, structure limitation caused by breaching film head because of high pressure at expulsion, and the structure, which also have, controls flexible, assembly letter
The advantages that single.
In order to solve the above technical problem present in superelevation press mold head, the invention patent has studied one kind, and " guiding is close
The film head of envelope " structure thoroughly solves space instead of traditional structure for applying pretightning force by more, large diameter bolt
The problem of arrangement, and the manufacturing cost and use cost for improving reliability of structure, reducing film head.
The scheme of the invention patent increases new construction " stuffing box " after the bolt arrangement for cancelling cylinder cap, cylinder body.It is led
(as shown in Figure 3) is constituted by the cabinet of tubular and main nut, cylinder body, oil distribution casing, diaphragm, cylinder cap is packed into filler box body,
Then main nut is screwed into, cylinder body lower end is fixed by filler box body, and main nut lower end will exist between cylinder cap between preload sealing
Gap generates high pressure oil by diaphragm type compressor itself oil system or external oil pump, is injected into the gap, high pressure oil will be in cylinder cap
Top generates " guide pressure ", so that cylinder cap and diaphragm, between diaphragm and oil distribution casing, generate enough fastening forces, to guarantee not
It reveals.
When guiding seals the assembly of film head, by cylinder body, oil distribution casing, diaphragm, cylinder cap successively from filler cabinet upper end opening
It is packed into and passes through positioning key and seam allowance and axial and circumferential positioning is carried out to gray iron therein, sealing ring is then packed into cylinder
End is covered, after assembling, by main nut being threaded into from filler cabinet upper end, main nut seam allowance is screwed onto and stuffing box is shown consideration for and closed
, high pressure oil connector is then screwed into cylinder body, and connect with molding machine itself oil system or external oil pump, passes through hydraulic system
Preload pressure is applied to film head, so far assembly finishes.
In order to guarantee that sealing surface has pretightning force, the guidance area and guide pressure of cylinder cap top clearance need to be calculated.
When generating the mode of guide pressure using hydraulic oil system.After the oil pressure in compressor is established, guiding
Region can reach pressure balance.However, guide pressure will not be fluctuated as membrane pressure machine hydraulic system, because in pilot line
Check-valves is installed.Check-valves guarantees that guide pressure is equal to maximum hydraulic pressure value, i.e. hydraulic pressure relief valves (bleeder valve) setting value.At this
In class film head, because the active area of guide pressure is greater than the area of film head membrane cavity, it can produce enough sealing fastenings
Power.
When generating the mode of guide pressure using external oil pump, after oil pump generates the guide pressure of setting, guidance field
It is isolated by valve.Pressure will be kept constant, and not need to correct.In this kind of film head, since the guide pressure of setting can be greater than most
Big hydraulic pressure value, therefore the active area of guide pressure does not need to be greater than membrane cavity area.
The cylinder cap of guiding sealing film head also needs to make a change, since guide pressure and main nut are above cylinder cap, so
The port direction of cylinder cap is taken over so as to air valve and is connected by being axially changed to radial direction.
Claims (5)
1. a kind of hydraulic guiding of super-pressure diaphragm type compressor seals film head, including cylinder cap, diaphragm, oil distribution casing and cylinder body, special
Sign is: further including stuffing box for receiving above-mentioned component and the main nut matched with stuffing box；The cylinder body is to fall
"convex" shaped is matched with filler lower box part；The groove for accommodating oil distribution casing and diaphragm is equipped on cylinder body top, the depth of groove is small
In the sum of oil distribution casing and the height of diaphragm；It is equipped with oil duct at the middle part of cylinder body, plunger is equipped in oil duct, plunger and compressor
Crankshaft is connected；The cylinder cap is equipped with air flue, and air flue is connected with air entry and exhaust outlet respectively, and air flue lower ending opening is in cylinder
Lid lower section；It is additionally provided with pressure oil-in in cylinder cap side, cylinder cap and main nut, which cooperate, above cylinder cap is equipped with pressure oil at gap
Outlet, pressure oil-in is connected with pressure oil export；Sealing ring is equipped at cylinder cap and main nut cooperation gap.
2. the hydraulic guiding of super-pressure diaphragm type compressor according to claim 1 seals film head, it is characterised in that: stuffing box
Lower section is equipped with opening.
3. the hydraulic guiding of super-pressure diaphragm type compressor according to claim 1 seals film head, it is characterised in that: stuffing box
Lower section is equipped with the flange matched with body.
4. the hydraulic guiding of super-pressure diaphragm type compressor according to claim 1 seals film head, it is characterised in that: stuffing box
On be respectively equipped with the opening matched with air entry, exhaust outlet, pressure oil-in.
5. the hydraulic guiding of super-pressure diaphragm type compressor according to claim 1 seals film head, it is characterised in that: in air-breathing
It is equipped with inlet valve at mouthful, is equipped with exhaust valve in exhaust ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910031241.5A CN109538451B (en) | 2019-01-14 | 2019-01-14 | Hydraulic guide type sealing membrane head of ultrahigh pressure diaphragm compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910031241.5A CN109538451B (en) | 2019-01-14 | 2019-01-14 | Hydraulic guide type sealing membrane head of ultrahigh pressure diaphragm compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109538451A true CN109538451A (en) | 2019-03-29 |
| CN109538451B CN109538451B (en) | 2024-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910031241.5A Active CN109538451B (en) | 2019-01-14 | 2019-01-14 | Hydraulic guide type sealing membrane head of ultrahigh pressure diaphragm compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607589A (en) * | 2022-04-21 | 2022-06-10 | 西安交通大学 | Diaphragm compressor and control method |
| CN116591949A (en) * | 2023-07-18 | 2023-08-15 | 合肥通用机械研究院有限公司 | Non-invasive type air pressure monitoring device and monitoring method for high-pressure diaphragm compressor |
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