阅读说明：本技术 密封布置结构 (Sealing arrangement ) 是由 阿尔内·赫格 于 2018-12-19 设计创作，主要内容包括：用于滑动叶片机的密封布置结构,该滑动叶片机用于对流体进行压缩或膨胀,该密封方法和密封布置结构用于使转子上的旋转平表面与机器壳体之间密封,以防止工艺流体在所述叶片机的内部容积与外部容积之间的流动,密封袋状件位于壳体端部处,并且密封袋状件朝着外部容积和内部容积的方向敞开,-组件,其布置成用于安装在所述密封袋状件中,所述组件包括：-活塞布置结构,以及-在所述活塞布置结构与所述平表面之间的密封轴承环；-流体供给管线,所述流体供给管线用于使加压的润滑流体通过所述壳体到达活塞腔,所述活塞布置结构还具有活塞流体通道,并且所述轴承密封环具有穿过所述轴承密封环的润滑导管,所述润滑导管与所述活塞流体通道相对应,-所述加压的润滑流体布置成用于使所述活塞移动成抵靠于所述密封轴承环,并且因此使所述密封轴承环移动成抵靠于所述密封表面,从而形成密封布置结构。(Sealing arrangement for a sliding vane machine for compressing or expanding a fluid, sealing method and sealing arrangement for sealing between a rotating flat surface on a rotor and a machine housing to prevent a flow of process fluid between an inner volume and an outer volume of the vane machine, sealing pockets being located at the housing ends and open towards the outer volume and the inner volume, an assembly arranged for mounting in the sealing pockets, the assembly comprising: -a piston arrangement, and-a seal bearing ring between the piston arrangement and the planar surface; -a fluid supply line for passing a pressurized lubricating fluid through the housing to a piston cavity, the piston arrangement further having a piston fluid passage and the bearing sealing ring having a lubrication duct passing through the bearing sealing ring, the lubrication duct corresponding to the piston fluid passage, -the pressurized lubricating fluid being arranged for moving the piston against the sealing bearing ring and thus the sealing bearing ring against the sealing surface, thereby forming a sealing arrangement.)

1. A sealing arrangement for a sliding vane machine for compressing or expanding a fluid, for sealing between a rotating flat surface (la) on a rotor (1) and a machine housing (2) to prevent the flow of process fluid (F) between an inner volume (10) and an outer volume (13) of the vane machine, wherein:

-the casing (2) comprises a sealing pocket (P) at a casing end (20) and which is open towards the external volume (13) and the internal volume (10),

-a sealing assembly (3) is arranged for mounting in the sealing pocket (P), the sealing assembly (3) comprising:

-a piston arrangement (5, 5'), and

-a seal bearing ring (4) between the piston arrangement (5, 5') and the planar surface (1 a);

-a fluid supply line (12) for pressurized Lubrication Fluid (LF) through the housing (2) to a piston cavity (6c), the piston arrangement (5, 5') further having a piston fluid channel (5b) and the bearing seal ring (4) having a lubrication duct (4d) passing through the bearing seal ring (4), the lubrication duct (4d) corresponding to the piston fluid channel (5b),

-the pressurized Lubrication Fluid (LF) is arranged for moving the piston (5, 5') and forcing the piston against the sealing bearing ring (4) and thereby moving the sealing bearing ring (4) and forcing the sealing bearing ring against the sealing surface (1 a).

2. The sealing arrangement of claim 1, further comprising:

-wherein the piston arrangement (5, 5') is accommodated in one or more corresponding piston cavities (6c), which piston cavities (6c) are arranged in an inner portion of the pocket (P).

3. The sealing arrangement of claim 2, further comprising:

-wherein the piston cavity (6c) is arranged in a wall in the pocket (P) in the housing (2).

4. The sealing arrangement of claim 1, further comprising

-a piston receiving ring (6), the piston receiving ring (6) being arranged between the sealing bearing ring (4) and the housing (2) and receiving one or more of the piston cavities (6d) for the piston arrangement (5, 5'), the piston receiving ring (6) further comprising a passage (6a) through the one or more piston cavities (6 d).

5. The sealing arrangement according to any one of the preceding claims, wherein the piston arrangement (5, 5') is an annular piston ring (5).

6. The sealing arrangement according to any one of the preceding claims, wherein the piston arrangement (5, 5 ') is a plurality of pistons (5').

7. The sealing arrangement of any one of claims 4 to 6, further comprising:

-a water-tight ring (8) arranged between the piston housing ring (6) and the housing (2), the water-tight ring (8) having one or more lubricating fluid conduits (8 a).

8. The sealing arrangement of any preceding claim, further comprising:

-a retaining and guiding ring (7) having a guiding ring surface (7a), the retaining and guiding ring (7) facing the piston receiving ring (6) and the retaining and guiding ring (7) being arranged on the piston receiving ring (6) in an outer circumferential portion of the supporting ring (6).

9. The sealing arrangement of claim 8, further comprising:

-the retaining and guiding ring (7) facing towards the piston receiving ring (6), the retaining and guiding ring (7) being arranged on the piston receiving ring (6) in an outer circumferential portion of the receiving ring (6) and coaxially on an outer circumferential portion of the sealing bearing ring (4).

10. The sealing arrangement according to any one of claims 4 to 8, further comprising a guiding and fixing arrangement, wherein,

-the sealing ring (4) has a shoulder (4s), which shoulder (4s) protrudes in a radially outward direction into interaction with a corresponding inwardly directed protruding shoulder (7s) on the guiding and fixing ring (7), and in addition the receiving ring (6) has a recess in the radial direction for limiting the guiding and fixing ring (7).

11. The sealing arrangement of claim 8, further comprising:

-a fastening device (FM) arranged in the guiding and fixing ring (7) for fixing the piston holder (6) and for fixing and guiding the sealing ring (4), wherein the fastening device (B, T) comprises:

-a through bolt (B) fixed and screwed into the housing (2), wherein the water-proof ring (8), the piston housing ring (6) and the guide and fixing ring (7) have through holes corresponding to the through bolt (B) and/or

-a thread (T), wherein the thread (T) is formed on an outer circumferential surface of the fixing ring (7), the thread (T) engaging with and engaging with a thread formed on an inner circumferential surface of the housing (2).

12. The sealing arrangement according to any one of the preceding claims, wherein the flow restriction of the bearing fluid passage (5b) is at least partly provided by a flow restrictor (5 a).

13. The sealing arrangement according to claim 12, wherein the restrictor (5a) is arranged in the bearing fluid channel (5b) in the piston (5, 5') to restrict fluid flow to the corresponding lubrication duct (4 d).

14. A sealing method for a sliding vane machine for sealing between a rotating flat surface (1a) on a rotor (1) and a machine casing (2) to prevent a process fluid (F) from flowing between an inner volume (10) and an outer volume (13) of the vane machine, the casing (2) comprising a sealing pocket (P) at a casing end (20) and open towards the outer volume (13) and the inner volume (10), the sealing method comprising the steps of:

-mounting an assembly (3) in the packing pocket (P) by arranging a packing ring (4) between a piston arrangement (5, 5') and the planar surface (1a),

-supplying fluid through a supply line (12) for supplying pressurized Lubricating Fluid (LF) through the housing (2) to a piston chamber (6c) and to a fluid passage (5b) in the piston arrangement (5, 5'),

and further to a lubrication duct (4d) passing through the bearing sealing ring (4) in correspondence of the piston fluid passage (5b),

-pressurizing the Lubricating Fluid (LF), thus,

-forcing the piston (5, 5') against the sealing bearing ring (4), and thus

-forcing the sealing bearing ring (4) against the sealing surface (1a) and thereby sealing between the flat rotating surface (1a) on the rotor (1) and the machine housing (2).

Technical Field

The invention relates to the technical field of sealing. More particularly, the present invention relates to a seal arrangement for a sliding vane machine used as a compressor, expander or pump.

Background

A sliding vane machine includes a rotor, which is typically eccentrically positioned in a cylindrical housing, and a plurality of vanes suspended in the rotor and following an inner wall in the cylindrical housing. Sliding vane machines are used for fluid processing and generally comprise: a housing having an inner wall forming a cavity and an inlet for supplying a process fluid and an outlet for delivering the process fluid; a rotor located in the cavity, wherein a distance between an outer face of the rotor and an inner wall of the housing varies along a direction of rotation; and vanes slidable in outwardly directed slots in the rotor for sliding relative to the rotor during rotation to extend between an outer face of the rotor and an inner wall of the housing. A closed or restricted space is defined between the vanes, the outer face of the rotor and the inner wall of the housing. Since the distance between the outer face of the rotor and the wall varies along the direction of rotation, the volume of the enclosed or confined space also varies along the direction of rotation. During operation, these confined spaces are filled with process fluid, and the change in volume of the confined spaces results in a changing flow of process fluid around the rotor. The inlet and outlet are positioned and shaped to provide a flow of process fluid from the inlet to the outlet.

The variable distance between the outer face of the rotor and the inner wall of the housing may be achieved by both the cavity and the rotor, which is cylindrical and which is eccentrically mounted in the cavity. Alternatively, the cavity may have other shapes, such as an oval shape. The two ends of the cavity are closed by end caps attached to the housing. The rotor and vanes extend in axially parallel directions through the entire cavity.

The rotor may be driven by an external drive. The rotor then drives the blades, and the blades move the process fluid. In this case, the rotary vane machine functions as a pump if the process fluid is a liquid, and as a compressor if the process fluid is a gas or a two-phase fluid, i.e. a mixture of liquid and gas. In other applications, the process fluid may drive the blades, thereby driving the rotor, which may perform external work. In this case, the rotary vane machine functions as a hydraulic motor if the process fluid is a liquid and as an expander if the process fluid is a gas or a two-phase fluid.

Disclosure of Invention

The main object of the present invention is to disclose a sealing arrangement which solves the problems of the prior art sealing arrangements.

The present invention is a sealing method and sealing arrangement for a sliding vane machine for compressing or expanding a fluid, for sealing between a rotating flat surface on a rotor and a machine housing to prevent flow of process fluid between an internal volume and an external volume of the vane machine, the vane machine comprising:

-the housing comprising a sealing pocket at an end of the housing and being open towards the outer volume and the inner volume,

-an assembly arranged for mounting in the sealed bag, the assembly comprising:

-a piston arrangement, and

-a seal bearing ring between the piston arrangement and the planar surface;

-a fluid supply line for passing pressurized lubrication fluid through the housing to a piston cavity, the piston arrangement further having a piston fluid passage and the bearing sealing ring having a lubrication duct passing through the bearing sealing ring, the lubrication duct corresponding to the piston fluid passage,

-the pressurized lubricating fluid is arranged for moving the piston towards and against the seal bearing ring and thereby the seal bearing ring towards and against the sealing surface, thereby forming a sealing arrangement.

The present invention addresses the shortcomings of prior art solutions by establishing a seal gap with a closely controlled gap distance, regardless of eccentric motion, even axial motion, of the sealing surfaces, wherein the seal gap has a predictable leakage rate, is frictionless, and does not wear the seal or sealing surfaces.