CN-122000242-A - High-voltage direct-current relay

CN122000242ACN 122000242 ACN122000242 ACN 122000242ACN-122000242-A

Abstract

The application relates to a high-voltage direct-current relay. The high-voltage direct-current relay comprises a fixed contact and a moving assembly, wherein the fixed contact is provided with a fixed contact, the moving assembly comprises a moving spring mechanism, a pushing mechanism, an elastic element, a support and a supporting element, the moving spring mechanism is in elastic fit with the pushing mechanism through the elastic element, two first support arms of the support are respectively positioned at two opposite sides of the moving spring mechanism, the first support arms are connected with the pushing mechanism and are in sliding fit with the moving spring mechanism, two ends of the supporting element are respectively connected with the two first support arms, the supporting element is partially opposite to the moving spring mechanism and is in spaced arrangement, and when the moving contact and the fixed contact are opened under the action of short-circuit current, the supporting element is used for abutting against the moving spring mechanism on a path of the moving spring mechanism, which moves towards the path close to the pushing mechanism. The high-voltage direct-current relay can achieve the effects of small volume, low cost and high short-circuit current and voltage resistance.

Inventors

DAI WENGUANG
CHEN WEIPENG
GUO XINLONG
FU DAPENG

Assignees

厦门宏发电力电器有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (15)

1. A high-voltage direct-current relay, characterized by comprising the following steps: a stationary contact provided with a stationary contact, and The movable assembly comprises a movable spring mechanism, a pushing mechanism, an elastic element, a support and a supporting element, wherein the movable spring mechanism is provided with a movable contact opposite to the movable contact, the movable spring mechanism is elastically matched with the pushing mechanism through the elastic element, the support comprises two first support arms, the two first support arms are respectively positioned on two sides of the movable spring mechanism opposite to the moving direction of the pushing mechanism, the first support arms are connected with the pushing mechanism and are in sliding fit with the movable spring mechanism, two ends of the supporting element are respectively connected with the two first support arms, the supporting element is partially opposite to the movable spring mechanism and is arranged at intervals, and when the movable contact and the movable contact spring mechanism spring open under the action of short-circuit current, the supporting element is used for abutting the movable spring mechanism on a path of the movable spring mechanism, which is close to the pushing mechanism.
2. The high-voltage direct current relay according to claim 1, wherein the elastic element is located between the moving spring mechanism and the pushing mechanism, and both ends are respectively abutted against the moving spring mechanism and the pushing mechanism.
3. The high voltage direct current relay according to claim 1, wherein the support element is located between the moving spring mechanism and the pushing mechanism.
4. The high voltage direct current relay according to claim 1, wherein the elastic element comprises a leaf spring, the elastic element comprises a base and two spring arms, the two spring arms are respectively connected to two ends of the base, the base is fixedly arranged on the pushing mechanism, and the supporting element is located between the two spring arms.
5. The high-voltage direct current relay according to claim 4, wherein the supporting element has a rod-shaped structure, and two ends of the supporting element are respectively penetrated through the two first support arms.
6. The high-voltage direct-current relay according to claim 4, wherein the movable spring mechanism comprises a movable spring and a lower armature, the movable contact is arranged on one side of the movable spring facing the fixed contact, the lower armature is fixedly connected with the movable spring, two ends of the movable spring protrude from the lower armature, two spring arms are respectively abutted to two ends of the movable spring protruding from the lower armature, and the support element is opposite to the lower armature.
7. The high-voltage direct-current relay according to claim 1, wherein the supporting element is of a sheet structure, the supporting element comprises a sheet-shaped main body and two protruding parts, the two protruding parts are respectively connected to two opposite edges of the sheet-shaped main body, the sheet-shaped main body is located between the two first support arms, and the two protruding parts are respectively embedded in the two first support arms.
8. The high-voltage direct current relay according to claim 7, wherein the sheet-like body is provided with a through hole, the elastic member includes a coil spring, and the elastic member penetrates the sheet-like body through the through hole.
9. The high-voltage direct current relay according to claim 7, wherein a receiving groove is concavely formed in a side of the pushing seat of the pushing mechanism, which faces the moving spring mechanism, the receiving groove is arranged corresponding to the sheet-shaped main body, and at least part of the sheet-shaped main body is received in the receiving groove.
10. The high voltage direct current relay according to claim 1, wherein the movable spring mechanism comprises a movable spring and a lower armature, the movable contact is arranged on one side of the movable spring facing the stationary contact, the lower armature is fixedly connected with the movable spring, and the supporting element is opposite to any one of the lower armature and the movable spring.
11. The high voltage dc relay of claim 10, further comprising an upper armature opposing the lower armature, the upper and lower armatures being magnetically attractable to each other when the movable contact and the stationary contact are opposing; wherein the upper armature is arranged outside the moving component and is fixed relative to the fixed contact, or The support also comprises a second support arm connected with the two first support arms, the second support arm is positioned at one side of the movable spring mechanism, which is opposite to the pushing mechanism, and the upper armature is fixed on the second support arm.
12. The high voltage direct current relay according to any one of claims 1 to 10, wherein the pushing mechanism is capable of driving the moving spring mechanism to move in a direction approaching the stationary contact, so that the high voltage direct current relay has a first state in which the moving contact is just in contact with the stationary contact, and a second state in which the moving contact is abutted against the stationary contact by the elastic member, and the pushing mechanism moves relative to the moving spring mechanism in a direction approaching the stationary contact during switching from the first state to the second state, and a distance between the supporting member and the moving spring mechanism is smaller in the second state than in the first state.
13. The high-voltage direct current relay according to claim 12, wherein in the second state, a difference between a dimension of the elastic element in a movement direction of the movable spring mechanism relative to the pushing mechanism and an ultimate compression length of the elastic element is larger than a distance between the support element and the movable spring mechanism.
14. The high voltage direct current relay according to claim 12, wherein the moving spring mechanism is capable of being sprung away from the fixed contact under the action of an electric repulsive force generated by a short circuit current so that the high voltage direct current relay is switched from the second state to a third state, and in the third state, the supporting element abuts against the moving spring mechanism to prevent the moving spring mechanism and the pushing mechanism from approaching each other, and the length of the elastic element is greater than the limit compression length of the elastic element.
15. The high-voltage direct current relay according to any one of claims 1 to 10, further comprising an electromagnetic assembly, wherein the pushing mechanism comprises a pushing seat and a pushing rod connected to one side of the pushing seat facing away from the moving spring mechanism, the moving spring mechanism is elastically matched with the pushing seat through the elastic element, the pushing rod is inserted into the electromagnetic assembly, and the electromagnetic assembly can drive the pushing seat to move towards or away from the fixed contact through the pushing rod.

Description

High-voltage direct-current relay Technical Field The application relates to the technical field of relays, in particular to a high-voltage direct-current relay. Background The high-voltage direct-current relay is used as a novel electric automatic switch, and a normally-open state or a normally-closed state can be realized through electromagnetic holding force. The current high-voltage direct current relay generally comprises an electromagnetic assembly, a movable assembly and a fixed contact, wherein a movable contact arranged on a movable reed of the movable assembly and a fixed contact arranged on the fixed contact are used as a contact part of the high-voltage direct current relay together. The electromagnetic assembly comprises a coil, an upper iron core and a lower iron core, when the coil is electrified, the lower iron core can be magnetized, and the lower iron core and the upper iron core are attracted mutually, so that the moving assembly is driven to be close to the static contact until a moving contact on the moving assembly is contacted with a static contact on the static contact, and the circuit is conducted. However, in the existing high-voltage direct current relay, when a circuit is short-circuited or overloaded, the moving contact and the fixed contact are sprung out due to excessive electric repulsive force, and an arc-pulling phenomenon is generated between the moving contact and the fixed contact, so that the relay is damaged. The miniaturization and short-circuit resistance of high-voltage direct-current relays are increasingly demanded in industries employing high-voltage circuits, such as new energy industries. Disclosure of Invention In view of this, it is necessary to provide a high-voltage dc relay which is easily damaged by the arcing phenomenon between the movable contact and the stationary contact at the time of short circuit and overload. A high voltage dc relay comprising: a stationary contact provided with a stationary contact, and The movable assembly comprises a movable spring mechanism, a pushing mechanism, an elastic element, a support and a supporting element, wherein the movable spring mechanism is provided with a movable contact opposite to the movable contact, the movable spring mechanism is elastically matched with the pushing mechanism through the elastic element, the support comprises two first support arms, the two first support arms are respectively positioned on two sides of the movable spring mechanism opposite to the moving direction of the pushing mechanism, the first support arms are connected with the pushing mechanism and are in sliding fit with the movable spring mechanism, two ends of the supporting element are respectively connected with the two first support arms, the supporting element is partially opposite to the movable spring mechanism and is arranged at intervals, and when the movable contact and the movable contact spring mechanism spring open under the action of short-circuit current, the supporting element is used for abutting the movable spring mechanism on a path of the movable spring mechanism, which is close to the pushing mechanism. According to the high-voltage direct current relay, when a circuit connected with the high-voltage direct current relay is short-circuited or overloaded, the movable contact of the guide actuating spring mechanism and the fixed contact of the fixed contact are sprung out due to electric repulsive force, the movable spring mechanism can compress the elastic element first until the supporting element abuts against the movable spring mechanism to prevent the movable spring mechanism from being relatively close to the pushing mechanism. Because the movable contact and the static contact spring open the back, the electronic repulsion between movable contact and the static contact disappears, at the in-process that movable spring mechanism moved to the supporting element butt movable spring mechanism towards the direction of keeping away from the static contact, the elastic component can effectively cushion movable spring mechanism's kinetic energy, and because the supporting element to movable spring mechanism's supporting action, can shorten movable spring mechanism and static contact's the biggest distance of opening, when making supporting element butt movable spring mechanism, the elastic component can not compressed to limit compression length, movable spring mechanism can not be too big to pushing mechanism's impact, avoid leading actuating assembly whole to break away from the static contact and lead to high-voltage direct current relay damage because of the impact. Moreover, the supporting element can prevent the movable spring mechanism from continuing to be far away from the fixed contact, the distance between the movable contact and the fixed contact, which is relatively sprung away, is favorable for reducing, and the buffer of the elastic element is matched to avoid the design that the movable component