公开(公告)号：US4939506A

公开(公告)日：1990-07-03

申请号：US148671

申请日：1988-01-26

Applicant: James A. Gram

Inventor： James A. Gram

IPC: H01R39/64 ,  H02H5/10 ,  H02K11/00

CPC classification number: H02H5/105 ,  H01R39/64 ,  H02K11/20 ,  H02K11/40

Abstract: A ground circuit monitor (10) is disclosed for continuously monitoring the potential of a grounding brush (12) in the grounding circuit (14) used to ground a rotating member (16) within a machine (18). A proximitor (26) generates a radio frequency signal impressed across the secondary of a coupling transformer (30). The primary of the coupling transformer (30) is in series between the grounding brush and ground. In normal operation, the capacitance of the film of lubrication between the rotating member and machine prevents oscillation in the transformer. Failure of the grounding circuit increases oscillation, generating an output from the proximitor to the relay unit (32) to generate an alarm.

Abstract translation: 公开了一种接地电路监视器（10），用于连续监测用于将机器（18）内的旋转构件（16）接地的接地电路（14）中的接地刷（12）的电位。 近端（26）产生跨越耦合变压器（30）的次级施加的射频信号。 耦合变压器（30）的主要串联在接地刷和地之间。 在正常操作中，旋转构件与机器之间的润滑膜的电容可防止变压器中的振荡。 接地电路的故障会增加振荡，产生从接近器到继电器单元（32）的输出，以产生报警。

公开(公告)号：US4655041A

公开(公告)日：1987-04-07

申请号：US820617

申请日：1986-01-21

Applicant: Richard J. Del Vecchio ,  James A. Gram

Inventor： Richard J. Del Vecchio ,  James A. Gram

IPC: F01D17/08 ,  F01D21/14 ,  F01K7/16 ,  F01K21/00

CPC classification number: F01D21/14 ,  F01D17/08 ,  F01K7/165

Abstract: A method and apparatus for protecting a turbine from undesirable temperature and pressure variations wherein an acceptable range of actual pressure and temperature variations is established, a first alarm signal is generated only if the acceptable range is exceeded by actual temperature or pressure, a second signal is established representing an acceptable rate of change of said actual pressure or temperature and a second alarm is generated if the actual rate of change of pressure or temperature exceeds the acceptable range of pressure or temperature whereby the second alarm signal is produced only when the first alarm signal is generated. In addition, a third signal is established representing a maximum rate of change of pressure and a third alarm signal is generated if the actual rate of change of pressure or temperature exceeds the maximum rate of change of pressure or temperature whereby the third alarm signal is produced only when the first alarm signal is generated.

Abstract translation: 一种用于保护涡轮机不受不良温度和压力变化的方法和装置，其中建立了实际压力和温度变化的可接受范围，仅当实际温度或压力超过可接受范围时才产生第一报警信号，第二信号为 建立代表所述实际压力或温度的可接受变化率，并且如果压力或温度的实际变化率超过压力或温度的可接受范围，则产生第二报警，由此仅当第一报警信号 被生成。 此外，如果压力或温度的实际变化率超过压力或温度的最大变化率，从而产生第三报警信号，则建立代表最大压力变化率的第三信号，并且产生第三报警信号 仅当产生第一个报警信号时。