CN101337445B - High pressure variable-load sealing structure - Google Patents
High pressure variable-load sealing structure Download PDFInfo
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- CN101337445B CN101337445B CN2008100017863A CN200810001786A CN101337445B CN 101337445 B CN101337445 B CN 101337445B CN 2008100017863 A CN2008100017863 A CN 2008100017863A CN 200810001786 A CN200810001786 A CN 200810001786A CN 101337445 B CN101337445 B CN 101337445B
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- chamber
- pressure
- pressure sensor
- end socket
- sealing structure
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Abstract
The invention discloses a high pressure variable load sealing structure, which comprises a pressing cylinder provided with a pressing cavity; a movable sealing head is installed in the pressing cavity, the front end of the movable sealing head extends into the expanding cavity of a hydraulic expanding machine to form a sealing surface; a pressure sensor I and a displacement sensor connected at the tail end of the movable sealing head are arranged in the pressing cavity; a pressure sensor II is arranged in the expanding cavity; the pressure sensor I, the pressure sensor II and the displacementsensor are electrically connected with an external controller; the controller is also electrically connected with two proportional servo valves for controlling the medium flow in the pressing cavity and the expanding cavity. The sealing structure can control the sealing surface to be provided with certain positive pressure, and ensure the expanding pressure of a pipe.
Description
Technical field
The present invention relates to a kind of superhigh pressure sealing structure of bulging hydraulic press, be specifically related to a kind of high pressure variable-load sealing structure.
Background technology
Super-pressure bulging part is generally thin-wall pipe, adopt bulging hydraulic press bulging, smaller when pre-sealed for the sealing surface applied pressure, and bulging pressure will reach 300MPa in the moulding process, if the sealing surface normal pressure between pipe fitting and the mould is less than the prescribed limit value during bulging, its sealing will be lost efficacy, and pipe fitting axially also will produce displacement, thereby cause bulging failure, if the sealing surface normal pressure between pipe fitting and the mould is greater than the prescribed limit value during bulging, goods will be crumpled.Its difficulty is the pressure height that seals, and be movable sealing, the deformable seal of existing metal material or nonmetallic materials, its deformation force that applies is all fixed, and the lip packing of employing nonmetallic materials, its deformation force that applies changes according to the change of operating mode, in case above-mentioned existing sealing means design typification or material behavior are determined just can't change, seal point is motionless, is difficult to satisfy the requirement in the bulging hydraulic press.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of high pressure variable-load sealing structure, can well solve super-pressure, movable sealing in the bulging hydraulic press bulging, not the situation of the sealing pair fixed, guarantee that the normal pressure between pipe fitting and the mould remains in certain scope to reach the reliability of sealing.
In order to solve the problems of the technologies described above: the present invention adopts following technical scheme: a kind of high pressure variable-load sealing structure, it is characterized in that: comprise being provided with the cylinder pressure of pressing the chamber, press in the chamber movable end socket is housed, the front end of movable end socket stretches in the bloated chamber of bulging hydraulic press and forms sealing surface, described pressure is provided with pressure sensor I in the chamber, be provided with pressure sensor II in the bloated chamber, described pressure sensor I and pressure sensor II are electrically connected with controller outside, and described controller also presses the chamber with control and two proportional servo valves of the chamber medium flow that expands are electrically connected.
Improved, described pressure also is provided with the displacement transducer that is connected movable end socket end in the chamber, and displacement transducer is connected with controller outside, in order to the displacement of detected activity end socket.
Preferably, the compression area of described movable end socket end is greater than the compression area of end socket front end.
Improved, described movable end socket front end outer wall is provided with pre-small post-large annular groove, but the pipe fitting ring set strengthens sealing effectiveness on the annular groove of movable end socket front end.
The present invention adopts technique scheme, pressure sensor I detects the pressure of the chamber mesohigh liquid that expands, the pressure in the pressure sensor II inspection pressure measuring cavity, the movement locus of displacement transducer detected activity end socket, according to above-mentioned detected pressure, displacement signal, handle by controller outside, output signal to the proportional servo valve of the bloated chamber of control mesohigh liquid and the proportional servo valve that liquid in the chamber is pressed in control, thereby control makes sealing surface that certain normal pressure be arranged, the bulging pressure of assurance pipe fitting.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is the structural representation of a kind of high pressure variable-load sealing structure of the present invention;
Fig. 2 is an A place enlarged drawing among Fig. 1.
The specific embodiment
As shown in Figure 1, structural representation for a kind of high pressure variable-load sealing structure of the present invention, this high pressure variable-load sealing structure comprises the cylinder pressure 1 that is provided with pressure chamber 11, press in the chamber 11 movable end socket 2 is housed, the front end 21 of movable end socket 2 stretches in the bloated chamber 31 of bulging hydraulic press 7 and forms sealing surface 32, be provided with pressure sensor I41 in the described pressure chamber 11, be provided with pressure sensor II42 in the bloated chamber 31, press in the chamber 11 and also be provided with the displacement transducer 43 that is connected movable end socket 2 ends 22, described pressure sensor I, pressure sensor II, displacement transducer is electrically connected with controller outside 44, and controller 44 also presses the chamber with control and two proportional servo valves of the chamber medium flow that expands are electrically connected.The compression area of described movable end socket end 22 is greater than the compression area of end socket front end.As shown in Figure 2, described movable end socket 2 front end outer walls are provided with pre-small post-large annular groove 23, and as tapered structure, but pipe fitting 6 ring sets are on the annular groove 23 of movable end socket front end.Wherein proportional servo valve be set to prior art commonly used, do not make signal in the drawings.
In the course of work, pressure sensor I detects the pressure of the chamber mesohigh liquid that expands, the pressure in the pressure sensor II inspection pressure measuring cavity, the movement locus of displacement transducer detected activity end socket, according to above-mentioned detected pressure, displacement signal, handle by controller outside, output signal to the proportional servo valve of the bloated chamber of control mesohigh liquid and the proportional servo valve that liquid in the chamber is pressed in control, thereby control makes sealing surface that certain normal pressure be arranged, the bulging pressure of assurance pipe fitting.
Claims (3)
1. high pressure variable-load sealing structure, comprise and be provided with the cylinder pressure (1) of pressing chamber (11), press in the chamber (11) movable end socket (2) is housed, the front end (21) of movable end socket (2) stretches into the middle sealing surface (32) that forms in bloated chamber (31) of bulging hydraulic press (3), be provided with pressure sensor 1 (41) in the described pressure chamber (31), be provided with pressure sensor II (42) in the bloated chamber (31), described pressure sensor I and pressure sensor II are electrically connected with controller outside (44), described controller also presses the chamber with control and two proportional servo valves of the chamber medium flow that expands are electrically connected, it is characterized in that: also be provided with the displacement transducer (43) that is connected movable end socket (2) terminal (22) in the described pressure chamber (11), displacement transducer (43) is connected with controller outside (44).
2. according to the described a kind of high pressure variable-load sealing structure of claim 1, it is characterized in that: the compression area of described movable end socket end is greater than the compression area of end socket front end.
3. according to the described a kind of high pressure variable-load sealing structure of claim 1, it is characterized in that: described movable end socket (2) front end outer wall is provided with pre-small post-large annular groove (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100017863A CN101337445B (en) | 2008-01-05 | 2008-01-05 | High pressure variable-load sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100017863A CN101337445B (en) | 2008-01-05 | 2008-01-05 | High pressure variable-load sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101337445A CN101337445A (en) | 2009-01-07 |
| CN101337445B true CN101337445B (en) | 2010-12-29 |
Family
ID=40211678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100017863A Expired - Fee Related CN101337445B (en) | 2008-01-05 | 2008-01-05 | High pressure variable-load sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101337445B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112976668B (en) * | 2021-03-10 | 2021-11-30 | 福州大学 | Feedforward compensation control system and method for improving passive leveling system of hydraulic machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4761982A (en) * | 1986-10-01 | 1988-08-09 | General Motors Corporation | Method and apparatus for forming a heat exchanger turbulator and tube |
| CN1042321A (en) * | 1988-11-02 | 1990-05-23 | 太原重型机械学院 | The hydraulic expansion method of annular work piece and device thereof |
| US5107693A (en) * | 1990-05-26 | 1992-04-28 | Benteler Aktiengesellschaft | Method of and apparatus for hydraulically deforming a pipe-shaped hollow member |
| CN2235333Y (en) * | 1995-12-29 | 1996-09-18 | 浙江大学 | Hydraulic expansion and formation machine |
| CN2351227Y (en) * | 1998-01-06 | 1999-12-01 | 机械工业部沈阳仪器仪表工艺研究所 | Corrugated pipe forming seal follow-up apparatus |
| CN1687618A (en) * | 2005-05-28 | 2005-10-26 | 杜明乾 | Sealing arrangement for pipe expanding machine |
| CN201147800Y (en) * | 2008-01-05 | 2008-11-12 | 湖州机床厂有限公司 | High-pressure variable load sealing structure |
-
2008
- 2008-01-05 CN CN2008100017863A patent/CN101337445B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4761982A (en) * | 1986-10-01 | 1988-08-09 | General Motors Corporation | Method and apparatus for forming a heat exchanger turbulator and tube |
| CN1042321A (en) * | 1988-11-02 | 1990-05-23 | 太原重型机械学院 | The hydraulic expansion method of annular work piece and device thereof |
| US5107693A (en) * | 1990-05-26 | 1992-04-28 | Benteler Aktiengesellschaft | Method of and apparatus for hydraulically deforming a pipe-shaped hollow member |
| CN2235333Y (en) * | 1995-12-29 | 1996-09-18 | 浙江大学 | Hydraulic expansion and formation machine |
| CN2351227Y (en) * | 1998-01-06 | 1999-12-01 | 机械工业部沈阳仪器仪表工艺研究所 | Corrugated pipe forming seal follow-up apparatus |
| CN1687618A (en) * | 2005-05-28 | 2005-10-26 | 杜明乾 | Sealing arrangement for pipe expanding machine |
| CN201147800Y (en) * | 2008-01-05 | 2008-11-12 | 湖州机床厂有限公司 | High-pressure variable load sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101337445A (en) | 2009-01-07 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20140105 |