An electromagnetic switch used in gas turbines

Abstract

An electromagnetic switch applied to a gas turbine belongs to the field of energy and power technology. The problem of large size, poor working reliability and low safety of the existing electromagnetic switch is solved. When the electromagnetic winding of the present invention is energized, the armature moves upward, the spring contracts, the shielding valve bonnet is separated from the shielding valve seat, and the gas entering the air supply pipe head enters the fuel injection pipe head through the air gaps on both sides of the shielding valve seat; when the electromagnetic winding is de-energized, the spring extends, the armature moves downward, and the shielding valve bonnet is buckled on the top of the shielding valve seat to block the gas from entering the fuel injection pipe head from the air supply pipe head. The present invention is suitable for use as an electromagnetic switch.

Description

Technical Field

[0001] The invention belongs to the technical field of energy and power, and in particular relates to an electromagnetic switch. Background Art

[0002] The gas turbine pneumatic control system is used to provide high-pressure compressed air to the gas turbine to meet the requirements of gas turbine anti-surge, startup fuel atomization, shutdown fuel purge, and overspeed emergency reduction. In order to control the supply and cut-off of compressed air in the pneumatic control system, an electromagnetic switch is set on the compressed air passage. Most existing electromagnetic switches are integral structures, not anti-corrosion, not flameproof, and have poor flexibility and abrasion resistance of moving parts, and low overall working reliability. Summary of the invention

[0003] The invention aims to solve the problems of large size, poor working reliability and low safety of the existing electromagnetic switch, and proposes an electromagnetic switch applied to a gas turbine.

[0004] The electromagnetic switch used in a gas turbine of the present invention comprises an injection pipe head 1, a first housing 2, an air supply pipe head 3, an electromagnetic winding 4, a spring 5, an armature 6, a shielding valve cap and a shielding valve seat 7;

[0005] The first shell 2 includes a longitudinal hollow cylindrical structure and a transverse hollow cylindrical structure, wherein the longitudinal hollow cylindrical structure and the transverse hollow cylindrical structure are perpendicular to each other and are internally connected;

[0006] One end of the air supply pipe head 3 is inserted into the longitudinal hollow cylindrical structure; and located at the bottom end of the longitudinal hollow cylindrical structure, a shielding valve seat 7 is also clamped in the longitudinal hollow cylindrical structure, and the shielding valve seat 7 is a hollow cylindrical structure, and the longitudinal hollow cylindrical structure, the shielding valve seat 7 and the air supply pipe head 3 are all coaxially arranged;

[0007] The position of the transverse hollow cylindrical structure corresponds to the upper half of the shielding valve seat 7;

[0008] One end of the fuel injection pipe head 1 is inserted into the transverse hollow cylindrical structure and is located in the other end of the transverse hollow cylindrical structure;

[0009] The lower half of the shielding valve seat 7 is tightly connected to the inner wall of the longitudinal hollow cylindrical structure; an air gap is provided between the upper half of the shielding valve seat 7 and the inner wall of the longitudinal hollow cylindrical structure;

[0010] The top of the shielding valve seat 7 corresponds to the bottom of the shielding valve bonnet; the shielding valve bonnet is clamped on the lower end of the armature 6, and the armature 6 is cylindrical;

[0011] The outer side of the armature 6 is sleeved with a second housing, the bottom end of the second housing is clamped on the top end of the longitudinal hollow cylindrical structure and sealed; the outer side of the second housing is wound with an electromagnetic winding 4;

[0012] A spring 5 is provided between the top end of the armature 6 and the top end surface of the second housing;

[0013] When the electromagnetic winding 4 is energized, the armature 6 moves upward, the spring 5 contracts, the shielding valve cap is separated from the shielding valve seat 7, and the gas entering the air supply pipe head 3 enters the injection pipe head 1 through the air gaps on both sides of the shielding valve seat 7;

[0014] The electromagnetic winding 4 is powered off, the spring is extended, the armature 6 moves downward, and the shielding valve cap is buckled on the top of the shielding valve seat 7, blocking the gas from entering the injection pipe head 1 from the gas supply pipe head 3.

[0015] Furthermore, it also includes a protective shell, which is buckled on the outside of the electromagnetic winding 4.

[0016] Furthermore, the air supply pipe head 3 is sealed from the longitudinal hollow cylindrical structure, and the fuel injection pipe head 1 is sealed from the transverse hollow cylindrical structure.

[0017] When the electromagnetic valve of the present invention supplies power to the electromagnetic switch, the electromagnet attracts the armature and compresses the spring to open the passage for supplying compressed air to the oil circuit. When the power is cut off, under the action of the spring, the shielding valve cap blocks the shielding valve seat, and the passage for supplying compressed air is closed. The spring is used to ensure that the electromagnetic switch is reset when the power is off, and the structure is compact, the operation is reliable, and the safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the electromagnetic switch applied to a gas turbine according to the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0022] Specific implementation method 1: The following is combined Figure 1The electromagnetic switch used in the gas turbine described in the present embodiment includes an injection pipe head 1, a first housing 2, an air supply pipe head 3, an electromagnetic winding 4, a spring 5, an armature 6, a shielding valve cap and a shielding valve seat 7;

[0023] The first shell 2 includes a longitudinal hollow cylindrical structure and a transverse hollow cylindrical structure, wherein the longitudinal hollow cylindrical structure and the transverse hollow cylindrical structure are perpendicular to each other and are internally connected;

[0024] One end of the air supply pipe head 3 is inserted into the longitudinal hollow cylindrical structure; and located at the bottom end of the longitudinal hollow cylindrical structure, a shielding valve seat 7 is also clamped in the longitudinal hollow cylindrical structure, and the shielding valve seat 7 is a hollow cylindrical structure, and the longitudinal hollow cylindrical structure, the shielding valve seat 7 and the air supply pipe head 3 are all coaxially arranged;

[0025] The position of the transverse hollow cylindrical structure corresponds to the upper half of the shielding valve seat 7;

[0026] One end of the fuel injection pipe head 1 is inserted into the transverse hollow cylindrical structure and is located in the other end of the transverse hollow cylindrical structure;

[0027] The lower half of the shielding valve seat 7 is tightly connected to the inner wall of the longitudinal hollow cylindrical structure; an air gap is provided between the upper half of the shielding valve seat 7 and the inner wall of the longitudinal hollow cylindrical structure;

[0028] The top of the shielding valve seat 7 corresponds to the bottom of the shielding valve bonnet; the shielding valve bonnet is clamped on the lower end of the armature 6, and the armature 6 is cylindrical;

[0029] The outer side of the armature 6 is sleeved with a second housing 8, the bottom end of the second housing 8 is clamped on the top end of the longitudinal hollow cylindrical structure and sealed; the outer side of the second housing 8 is wound with an electromagnetic winding 4;

[0030] A spring 5 is provided between the top end of the armature 6 and the top end surface of the second housing 8;

[0031] When the electromagnetic winding 4 is energized, the armature 6 moves upward, the spring 5 contracts, the shielding valve cap is separated from the shielding valve seat 7, and the gas entering the air supply pipe head 3 enters the injection pipe head 1 through the air gaps on both sides of the shielding valve seat 7;

[0032] The electromagnetic winding 4 is powered off, the spring is extended, the armature 6 moves downward, and the shielding valve cap is buckled on the top of the shielding valve seat 7, blocking the gas from entering the injection pipe head 1 from the gas supply pipe head 3.

[0033] Furthermore, it also includes a protective shell 9 , which is buckled on the outside of the electromagnetic winding 4 .

[0034] Furthermore, the air supply pipe head 3 is sealed from the longitudinal hollow cylindrical structure, and the fuel injection pipe head 1 is sealed from the transverse hollow cylindrical structure.

[0035] This electromagnetic switch is designed to be flameproof in strict accordance with the standards. The entire electromagnetic switch is a split structure, which improves the convenience of assembly and installation. The surface hardness and roughness of the armature are improved, and the abrasion resistance, flexibility and reliability of the action are increased. The sealing material is fluororubber, which has the characteristics of high strength, aging resistance and impact resistance. The overall material is stainless steel and soft magnetic material, which is corrosion-resistant and suitable for marine environment.

[0036] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. An electromagnetic switch applied to a gas turbine, characterized in that: It comprises an oil injection pipe head (1), a first housing (2), an air supply pipe head (3), an electromagnetic winding (4), a spring (5), an armature (6), a shielding valve cap and a shielding valve seat (7); The first shell (2) comprises a longitudinal hollow cylindrical structure and a transverse hollow cylindrical structure, wherein the longitudinal hollow cylindrical structure and the transverse hollow cylindrical structure are perpendicular to each other and are internally connected; One end of the air supply pipe head (3) is inserted into the longitudinal hollow cylindrical structure; and is located at the bottom end of the longitudinal hollow cylindrical structure. A shielding valve seat (7) is also clamped in the longitudinal hollow cylindrical structure. The shielding valve seat (7) is a hollow cylindrical structure, and the longitudinal hollow cylindrical structure, the shielding valve seat (7) and the air supply pipe head (3) are all coaxially arranged. The position of the transverse hollow cylindrical structure corresponds to the upper half of the shielding valve seat (7); One end of the fuel injection pipe head (1) is inserted into the transverse hollow cylindrical structure and is located inside the other end of the transverse hollow cylindrical structure; The lower half of the shielding valve seat (7) is tightly connected to the inner wall of the longitudinal hollow cylindrical structure; an air gap is provided between the upper half of the shielding valve seat (7) and the inner wall of the longitudinal hollow cylindrical structure; The top of the shielding valve seat (7) corresponds to the bottom surface of the shielding valve bonnet; the shielding valve bonnet is clamped on the lower end of the armature (6), and the armature (6) is cylindrical; The outer side of the armature (6) is sleeved with a second shell (8), the bottom end of the second shell (8) is clamped on the top end of the longitudinal hollow cylindrical structure and is sealed; the outer side of the second shell (8) is wound with an electromagnetic winding (4); A spring (5) is provided between the top end of the armature (6) and the top end surface of the second housing (8); When the electromagnetic winding (4) is energized, the armature (6) moves upward, the spring (5) contracts, the shielding valve cap separates from the shielding valve seat (7), and the gas entering the air supply pipe head (3) enters the fuel injection pipe head (1) through the air gaps on both sides of the shielding valve seat (7); When the electromagnetic winding (4) is powered off, the spring is extended, the armature (6) moves downward, and the shielding valve cap is buckled on the top of the shielding valve seat (7), thereby blocking the gas from entering the fuel injection pipe head (1) from the gas supply pipe head (3).

2. The electromagnetic switch used for a gas turbine according to claim 1, characterized in that: It also comprises a protective shell (9), wherein the protective shell (9) is buckled on the outside of the electromagnetic winding (4).

3. The electromagnetic switch used for a gas turbine according to claim 1, characterized in that: The air supply pipe head (3) is sealed with the longitudinal hollow cylindrical structure, and the oil injection pipe head (1) is sealed with the transverse hollow cylindrical structure.

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