JP2009243341A - Bleeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly keep pressure of a compressed fluid supplied to a supply mate regardless of an operation condition, without complicating a device constitution and control, in a bleeding device for supplying the compressed fluid bled from a compressor to the supply mate. <P>SOLUTION: This bleeding device is provided for supplying the compressed fluid bled from the compressor to the supply mate, and has pressure adjusting mechanisms 2 and 3 for adjusting the pressure of the compressed fluid toward target pressure, by operating by being pressed from the compressed fluid, when inlet pressure being the pressure of the compressed fluid in an inlet, is higher than the target pressure for using the pressure of the compressed fluid supplied to the supply mate as a target value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an extraction device that supplies compressed fluid extracted from a compressor to a predetermined supply destination.

  In an apparatus including a compressor such as a gas turbine engine, a part of fluid (compressed fluid) compressed in the compressor may be extracted from the compressor and supplied to a supply destination that requires the compressed fluid.

By the way, in an apparatus in which the output of a gas turbine engine or the like changes, the pressure and temperature of the compressed fluid extracted from the compressor change according to the operating conditions (that is, the operating conditions of the compressor) of the apparatus such as the gas turbine engine. To do.
On the other hand, the pressure of the extracted compressed fluid is preferably maintained at an appropriate pressure regardless of the operating conditions because the compressed fluid is used for oil seals and cooling.

For this reason, for example, Patent Document 1 proposes a method of controlling a control valve arranged in a bleed passage of compressed fluid by a control controller in accordance with the operating condition of the turbine.
JP 2001-207864 A

  However, according to the method shown in Patent Document 1, a control controller that grasps the operating conditions of the turbine and controls the control valve according to the state is required, which complicates the apparatus configuration and control and reduces the apparatus cost. In addition, the maintenance cost is increased.

  The present invention has been made in view of the above-described problems, and in an extraction device that supplies compressed fluid extracted from a compressor to a supply destination, compression supplied to the supply destination without complicating the device configuration and control. The purpose is to maintain the fluid pressure appropriately regardless of the operating conditions.

  In order to achieve the above object, the present invention provides an extraction device for supplying a compressed fluid extracted from a compressor to a supply destination, wherein an inlet pressure, which is a pressure of the compressed fluid at an inlet, is supplied to the supply destination. Pressure adjustment that operates by being pressed from the compressed fluid and adjusts the pressure of the compressed fluid toward the target pressure when the pressure of the compressed fluid is higher than a target pressure for setting the pressure to the target value A mechanism is provided.

  According to the present invention as described above, when the pressure adjusting mechanism that operates by being pressed from the compressed fluid has an inlet pressure that is the pressure of the compressed fluid at the inlet of the pressure adjusting mechanism higher than the target pressure, the compressed fluid Is adjusted toward the target pressure.

  In the present invention, the pressure adjusting mechanism includes a pressure adjusting valve that defines an opening degree of a flow path through which the compressed fluid passes, and an elastic that expands and contracts according to a pressing force that the pressure adjusting valve receives from the compressed fluid. Adopt a structure with a body.

  In the present invention, a configuration is adopted in which the pressure control valve includes a stopper that prevents the flow path from being completely closed.

  Moreover, in this invention, the structure of providing the several pressure adjustment mechanism connected to the location where the pressure of the said compressor differs is employ | adopted.

  Further, in the present invention, when the outlet side flow paths of the plurality of pressure adjusting mechanisms are integrated at the front stage of the supply destination, the pressure adjustment connected to the relatively low pressure portion of the compressor. The mechanism employs a configuration including a closing mechanism that closes the flow path through which the compressed fluid passes when the pressure of the compressed fluid on the outlet side is higher than the pressure at the location of the compressor to which the outlet is connected.

According to the present invention, when the pressure adjustment mechanism that operates by being pressed from the compressed fluid causes the pressure of the compressed fluid at the inlet of the pressure adjustment mechanism to be higher than the target pressure, the pressure of the compressed fluid is reduced. It is adjusted towards the target pressure. For this reason, it is not necessary to control the pressure adjusting mechanism, and the pressure of the compressed fluid supplied to the supply destination can be adjusted toward the target pressure without providing a separate controller.
Therefore, according to the present invention, in the extraction device that supplies the compressed fluid extracted from the compressor to the supply destination, the pressure of the compressed fluid supplied to the supply destination depends on the operating conditions without complicating the device configuration and control. It is possible to keep it appropriate.

  Hereinafter, an embodiment of a bleeder according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.

  FIG. 1 is a schematic diagram illustrating a schematic configuration of the bleeder according to the present embodiment. The bleeder 1 of the present embodiment bleeds compressed fluid from the compressor 10 and supplies it to the sump chamber 20 as a supply destination, and is connected to the compressor 10 and the sump chamber 20 as shown in FIG. ing.

The bleeder 1 includes a front-side pressure adjustment mechanism 2 (pressure adjustment mechanism) and a rear-stage pressure adjustment mechanism 3 (pressure adjustment mechanism).
The pre-stage pressure adjusting mechanism 2 is connected to the pre-stage side 10 </ b> A (the side where the pressure of the compressed fluid is relatively low on the upstream side in the flow direction of the compressed fluid) in the compressor 10. The pressure of the compressed fluid R1 extracted from 10A is adjusted.
Further, the rear stage side pressure adjusting mechanism 3 is connected to the rear stage side 10B (the side where the pressure of the compressed fluid is relatively high on the downstream side in the flow direction of the compressed fluid) in the compressor 10, and the rear stage side of the compressor 10 The pressure of the compressed fluid R2 extracted from 10B is adjusted.
In more detail, the front-stage pressure adjustment mechanism 2 and the rear-stage pressure adjustment mechanism 3 are configured such that the inlet pressure, which is the pressure of the compressed fluid at the inlet, uses the pressure of the compressed fluid supplied to the sump chamber 20 as a target value. The pressure of the compressed fluid R1, R2 is adjusted toward the target pressure.
As described above, the bleeder 1 of the present embodiment includes the plurality of pressure adjusting mechanisms 2 and 3 connected to the front side 10A and the rear side 10B, which are places where the pressure of the compressor 10 is different.

  Further, the outlet-side flow path 4 of the front-stage pressure adjustment mechanism 2 and the outlet-side flow path 5 of the rear-stage pressure adjustment mechanism 3 are integrated in the front stage of the sump chamber 20, as shown in FIG.

FIG. 2 is a schematic diagram showing a more detailed configuration of the front-stage pressure adjustment mechanism 2 and the rear-stage pressure adjustment mechanism 3.
As shown in this figure, the pre-stage pressure adjusting mechanism 2 includes a pressure adjusting valve 21, a valve spring 22, a stopper 23, and a check valve 24 (closing mechanism).
The pressure control valve 21 regulates the opening degree of the flow path through which the compressed fluid R1 extracted from the front stage side 10A of the compressor 10 passes, and narrows the flow path by moving upward on the paper surface, and below the paper surface. The flow path is expanded by moving.

The valve spring 22 supports the pressure control valve 21 and contracts according to the pressing force that the pressure control valve 21 receives from the compressed fluid R1.
Specifically, the valve spring 22 is contracted by the pressing force received by the pressure regulating valve 21 when the pressure of the compressed fluid R1 is higher than the target pressure, and the pressure of the compressed fluid R1 is reduced to the pressure regulating valve 21. The spring constant is set so that the pressure control valve 21 closes the flow path when the pressure is so high that the pressure cannot be adjusted to the target pressure (upper limit pressure).
When the inlet pressure is higher than the target pressure and lower than the upper limit pressure, the valve spring 22 changes the pressure loss in the pressure control valve 21 according to the pressure of the compressed fluid R1, and thereby the outlet pressure of the compressed fluid R1. The pressure control valve 21 is moved so that (the pressure of the compressed fluid at the outlet) approaches the target pressure.

  The stopper 23 is used to prevent the pressure control valve 21 from completely closing the flow path even when the inlet pressure is higher than the upper limit pressure, and the flow path wall before the pressure control valve 21. It protrudes from the pressure control valve 21 so as to abut.

  The check valve 24 closes the flow path of the compressed fluid R1 when the outlet pressure becomes higher than the inlet pressure. That is, the check valve 24 prevents the compressed fluid R1 from flowing backward.

The rear-stage pressure adjustment mechanism 3 includes a pressure adjustment valve 31 and a valve spring 32.
The pressure control valve 31 regulates the opening degree of the flow path through which the compressed fluid R2 extracted from the rear stage side 10B of the compressor 10 passes. The flow path is expanded by moving.

The valve spring 32 supports the pressure control valve 31 and contracts according to the pressing force that the pressure control valve 31 receives from the compressed fluid R2.
Specifically, the valve spring 32 is contracted by the pressing force received by the pressure regulating valve 31 when the pressure of the compressed fluid R1 is higher than the above target pressure, and the pressure of the compressed fluid R2 is reduced to the pressure regulating valve 31. The spring constant is set so that the pressure control valve 31 closes the flow path when the pressure is so high that the pressure cannot be adjusted to the target pressure (upper limit pressure).
When the inlet pressure is higher than the target pressure and lower than the upper limit pressure, the valve spring 32 changes the pressure loss in the pressure control valve 31 according to the pressure of the compressed fluid R2, and thereby the outlet pressure of the compressed fluid R2. The pressure control valve 31 is moved so that (the pressure of the compressed fluid at the outlet) approaches the target pressure.

In the bleeder 1 of the present embodiment, the rear-stage pressure adjustment mechanism 3 does not include the stopper 23 provided in the front-stage pressure adjustment mechanism 2. For this reason, when the pressure of the compressed fluid R2 exceeds the upper limit pressure, the pressure adjusting valve 31 of the rear-stage pressure adjusting mechanism 3 completely closes the flow path of the compressed fluid R2.
In addition, the upper limit pressure in the front stage side pressure adjustment mechanism 2 and the upper limit pressure in the rear stage side pressure adjustment mechanism 3 may be set to be the same or different.

In the bleeder 1 of the present embodiment, the rear-stage pressure adjustment mechanism 3 does not include the check valve 24 provided in the front-stage pressure adjustment mechanism 2.
That is, the bleeder 1 according to the present embodiment includes a plurality of pressure adjustment mechanisms (the front-side pressure adjustment mechanism 2 and the rear-stage pressure adjustment mechanism) that are connected to different portions of the compressor 10 (the front-stage side 10A and the rear-stage side 10B). 3), and the outlet side flow paths 4 and 5 of these pressure adjusting mechanisms are integrated in the front stage of the sump chamber 20, and connected to a relatively low pressure portion (front stage side 10A) of the compressor 10. When the pressure adjusting mechanism (the front-side pressure adjusting mechanism 2) is higher than the pressure (inlet pressure) at the location of the compressor 10 to which the pressure (outlet pressure) of the compressed fluid on the outlet side is connected, A check valve 24 is provided to close the passage that passes therethrough.

  Next, the operation of the bleeder 1 of the present embodiment configured as described above will be described with reference to FIGS. In the following description, from the case where the operating state of the compressor 10 is a low operating condition (for example, the case where the gas turbine engine in which the compressor 10 is installed is a low operating condition), the operating state is increased through an intermediate operating condition. The operation of the bleeder 1 when shifting to operating conditions will be described.

First, when the operating state of the compressor 10 is a low operating condition, the pressure of the compressed fluid generated in the compressor 10 is low, and the pressure of the compressed fluid R2 extracted from the rear stage side 10B is reduced to the rear stage side pressure adjusting mechanism 3. It is assumed that the pressure is lower than the upper limit pressure.
When the operating state of the compressor 10 is in a low operating condition, as shown in FIGS. 3 and 4, the pressure control valve 31 of the rear pressure control mechanism 3 opens the flow path of the compressed fluid R2. Then, the compressed fluid R <b> 2 is supplied to the sump chamber 20.

Here, when the operating state of the compressor 10 is in a range of low operating conditions, when the pressure of the compressed fluid R2 changes, the amount of contraction of the valve spring 32 changes, and the pressure of the compressed fluid R2 approaches the target pressure. The pressure loss due to the control valve 31 changes.
More specifically, when the pressure of the compressed fluid R2 is relatively low when the operating state of the compressor 10 is in the low operating condition range, the difference between the pressure of the compressed fluid R2 and the target pressure is small. As shown in FIG. 2, the valve spring 32 is contracted so that the opening degree of the pressure control valve 31 is widened, so that the pressure loss in the pressure control valve 31 is reduced, and as a result, the pressure of the compressed fluid R2 is slightly reduced to the target pressure. Get closer.
On the other hand, when the pressure of the compressed fluid R2 is relatively high when the operating state of the compressor 10 is in the low operating condition range, the difference between the pressure of the compressed fluid R2 and the target pressure is large. Further, the valve spring 32 is contracted so that the opening degree of the pressure control valve 31 is narrowed, so that the pressure loss in the pressure control valve 31 is increased, whereby the pressure of the compressed fluid R2 is greatly decreased and approaches the target pressure.

When the pressure of the compressed fluid R2 that has been pressure-adjusted by the rear-stage pressure adjusting mechanism 3 is higher than the inlet pressure of the front-stage-side pressure adjusting mechanism 2, the check fluid 24 is used by the check valve 24 of the front-stage pressure adjusting mechanism 2. Is closed, and the backflow of the compressed fluid is prevented.
On the other hand, when the pressure of the compressed fluid R2 adjusted by the rear-stage pressure adjusting mechanism 3 is lower than the inlet pressure of the former-stage pressure adjusting mechanism 2, the compressed fluid R1 may flow into the outlet-side flow path.

Subsequently, when the operating state of the compressor 10 is an intermediate operating condition, the pressure of the compressed fluid R2 extracted from the rear stage side 10B of the compressor 10 is higher than the upper limit pressure of the rear stage side pressure adjustment mechanism 3, and the compressor It is assumed that the pressure of the compressed fluid R <b> 1 extracted from the 10 front stage side 10 </ b> A is lower than the upper limit pressure of the front stage side pressure adjustment mechanism 2.
When the operation state of the compressor 10 is an intermediate operation condition, as shown in FIGS. 5 and 6, the pressure control valve 31 of the rear pressure control mechanism 3 closes the flow path of the compressed fluid R <b> 2. Then, the pressure regulating valve 21 of the upstream side pressure regulating mechanism 2 opens the flow path of the compressed fluid R1, and the compressed fluid R1 is supplied to the sump chamber 20.

Here, when the operating state of the compressor 10 is in the range of the intermediate operating condition, when the pressure of the compressed fluid R1 changes, the amount of contraction of the valve spring 22 changes, so that the pressure of the compressed fluid R1 approaches the target pressure. The pressure loss due to the control valve 21 changes.
More specifically, when the operating state of the compressor 10 is in the range of the intermediate operating condition and the pressure of the compressed fluid R1 is relatively low, the difference between the pressure of the compressed fluid R1 and the target pressure is small. As shown in FIG. 4, the valve spring 22 is contracted so that the opening degree of the pressure control valve 21 is widened, so that the pressure loss in the pressure control valve 21 is reduced, whereby the pressure of the compressed fluid R1 is slightly reduced to the target pressure. Get closer.
On the other hand, when the operating state of the compressor 10 is in the range of the intermediate operating condition and the pressure of the compressed fluid R1 is relatively high, the difference between the pressure of the compressed fluid R1 and the target pressure is large, so as shown in FIG. In addition, the valve spring 22 is contracted so that the opening degree of the pressure control valve 21 is narrowed, so that the pressure loss in the pressure control valve 21 is increased, whereby the pressure of the compressed fluid R1 is greatly decreased and approaches the target pressure.

Thus, according to the bleeder 1 of the present embodiment, when the operating condition of the compressor 10 becomes high, the supply of the relatively high temperature and high pressure compressed fluid is stopped, and the low temperature and low pressure compressed fluid is supplied to the sump chamber 20. The
For this reason, it is possible to prevent a high-temperature compressed fluid from flowing into the sump chamber 20 unnecessarily, and to reduce heat countermeasures in the sump chamber 20.

Subsequently, when the operating state of the compressor 10 is a high operating condition, the pressure of the compressed fluid generated in the compressor 10 is high, and the compressed fluid R1 extracted from the upstream side 10A is discharged from the upstream side pressure adjusting mechanism 2. It is assumed that the pressure of the compressed fluid R2 extracted from the rear stage side 10B is higher than the upper limit pressure and higher than the upper limit pressure of the rear stage pressure adjustment mechanism 3.
And when the operation state of such a compressor 10 is a high operation condition, as shown in FIG. 7, the pressure regulation valve 31 of the back | latter stage side pressure regulation mechanism 3 closes the flow path of compression fluid R2. Further, the pressure regulating valve 21 of the upstream side pressure regulating mechanism 2 also attempts to close the flow path of the compressed fluid R1, but since the stopper 23 secures the flow path to the flow path slightly, a part of the compressed fluid R1 is sampled. Supplied to the chamber 20.
Thus, in the bleeder 1 of this embodiment, the supply of the compressed fluid to the sump chamber 20 can be continued even if the operating state of the compressor 10 is a high operating condition.

According to the bleeder 1 of the present embodiment as described above, the compressed fluids R1 and R2 at the inlets of the pressure regulating mechanisms 2 and 3 are operated by the pressure regulating mechanisms 2 and 3 that are operated by being pressed from the compressed fluids R1 and R2. When the inlet pressure, which is the pressure of R2, is higher than the target pressure, the pressures of the compressed fluids R1 and R2 are adjusted toward the target pressure. For this reason, it is not necessary to control the pressure adjusting mechanisms 2 and 3, and the pressure of the compressed fluid supplied to the sump chamber 20 can be adjusted toward the target pressure without providing a separate controller.
Therefore, according to the extraction device 1 of the present embodiment, in the extraction device that supplies the compressed fluid extracted from the compressor to the supply destination, the pressure of the compressed fluid supplied to the supply destination without complicating the device configuration and control. Can be kept appropriate regardless of the operating conditions.

  As mentioned above, although preferred embodiment of the extraction apparatus which concerns on this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the above-described embodiment, the configuration including two pressure adjustment mechanisms (the front-stage pressure adjustment mechanism 2 and the rear-stage pressure adjustment mechanism 3) has been described.
However, the present invention is not limited to this, and a configuration in which one or three or more pressure adjusting mechanisms are provided may be employed.

Moreover, in the said embodiment, the structure which uses the valve springs 22 and 32 as an elastic body in this invention was demonstrated.
However, the present invention is not limited to this, and heat-resistant rubber or the like may be used as the elastic body in the present invention.

It is a schematic diagram of the extraction apparatus in one Embodiment of this invention. It is a detailed schematic diagram of the extraction apparatus in one Embodiment of this invention. It is explanatory drawing explaining operation | movement of the extraction apparatus in one Embodiment of this invention. It is explanatory drawing explaining operation | movement of the extraction apparatus 1 in one Embodiment of this invention. It is explanatory drawing explaining operation | movement of the extraction apparatus 1 in one Embodiment of this invention. It is explanatory drawing explaining operation | movement of the extraction apparatus 1 in one Embodiment of this invention. It is explanatory drawing explaining operation | movement of the extraction apparatus 1 in one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Extraction device, 2 ... Pre-stage side pressure regulation mechanism (pressure regulation mechanism), 21 ... Pressure regulation valve, 22 ... Valve spring (elastic body), 24 ... Check valve (closing mechanism), 3 ... Rear side pressure adjusting mechanism (pressure adjusting mechanism), 31 ... Pressure adjusting valve, 32 ... Valve spring (elastic body), R1, R2 ... Compressed fluid, 10 ... Compressor, 10A ... Previous side, 10B ... ... latter stage, 20 ... sump room (supplier)

Claims (5)

An extraction device that supplies a compressed fluid extracted from a compressor to a supply destination,
When the inlet pressure, which is the pressure of the compressed fluid at the inlet, is higher than a target pressure for setting the pressure of the compressed fluid supplied to the supply destination as a target value, the pressure is actuated by being pressed from the compressed fluid. And a pressure adjusting mechanism that adjusts the pressure of the compressed fluid toward the target pressure. The pressure adjusting mechanism includes:
A pressure regulating valve that defines an opening of a flow path through which the compressed fluid passes;
The bleeder according to claim 1, further comprising: an elastic body that expands and contracts according to a pressing force that the pressure control valve receives from the compressed fluid.   The bleeder according to claim 2, further comprising a stopper that prevents the pressure control valve from completely closing the flow path.   The bleeder according to any one of claims 1 to 3, further comprising a plurality of pressure adjusting mechanisms connected to different parts of the compressor. When the outlet side flow paths of a plurality of the pressure adjusting mechanisms are integrated at the front stage of the supply destination, the pressure adjusting mechanism connected to the relatively low pressure portion of the compressor is the outlet side compression. 5. The bleeder according to claim 4, further comprising a closing mechanism that closes a flow path through which the compressed fluid passes when the pressure of the fluid is higher than a pressure at a location of the compressor to which the fluid is connected.

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