-
公开(公告)号：US3859006A
公开(公告)日：1975-01-07
申请号：US36845673
申请日：1973-06-08
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
CPC classification number: F04D15/0066 , F04B17/00 , F04B49/065 , F04B2201/0801 , F04B2201/0802 , F04B2201/1212 , F04B2203/1101 , F04B2203/1103 , F04B2205/06 , F04B2207/044
Abstract: In a steam turbine driven pump installation, the steam flow to the turbine is controlled by a combined stop and throttle valve which includes a power operated actuator so as to vary the output of the pump, and a speed feed-back control is provided for the turbine comprising an indicator issuing a signal corresponding to the turbine speed, and a comparator comparing the speed signal with a desired value and delivering a control signal based on the comparison to a servo-device of the valve actuator for adjustment of the valve whereby turbine speed may be maintained constant. Additionally the installation includes an emergency control respondent to operating conditions in the installation e.g. turbine overspeed, oil pressure etc., the emergency control including a switch in the power supply to the valve actuator whereby in the event of the operating condition being unsatisfactory the switch is opened to close the steam valve.
Abstract translation: 在汽轮机驱动泵安装中，通过组合的止回阀和节流阀来控制到涡轮机的蒸汽流，该止回阀和节流阀包括一个动力操纵的致动器，以便改变泵的输出，并提供速度反馈控制 涡轮机，其包括发出对应于涡轮机速度的信号的指示器，以及将速度信号与期望值进行比较的比较器，并且基于与阀致动器的伺服装置的比较传递控制信号，以调节阀，从而涡轮速度 可以保持恒定。 此外，安装包括对安装中的操作条件的应急控制。 涡轮超速，油压等，应急控制包括向阀致动器供电的开关，由此在操作状态不令人满意的情况下，开关打开以关闭蒸汽阀。
-
公开(公告)号：AU3929272A
公开(公告)日：1973-08-30
申请号：AU3929272
申请日：1972-02-23
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
IPC: F16J15/32
-
公开(公告)号：DE2244104A1
公开(公告)日：1973-03-15
申请号：DE2244104
申请日：1972-09-08
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
Abstract: A control system for a pump installation comprising a primary feed back circuit including sensors measuring the fluid discharge pressure of the pump and possibly additionally the fluid flow in the pump discharge and regulating the speed of the pump drive to control said discharge pressure in dependence for example on the pressure requirements of boiler feed, and including additionally a secondary feed back circuit sensing further operating conditions in the pump installation e.g. water and oil pressures. The primary circuit delivers a speed control signal for actuation of control valve means of the pump drive which may be for example a steam turbine, and the secondary circuit is coupled to a gate of the primary circuit whereby in the event of any of the further conditions being unsatisfactory the control signal is interrupted and the pump stopped.
-
公开(公告)号：GB1294090A
公开(公告)日：1972-10-25
申请号：GB5990568
申请日：1968-12-17
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
IPC: B01D19/00
Abstract: 1294090 Feedwater apparatus WEIR PUMPS Ltd 5 Dec 1969 [17 Dec 1968] 59905/68 Heading F4A Apparatus for deaerating boiler feedwater comprises a single module including means 10, 4 for supplying water to a deaerating chamber 6, in which it is heated approximately to boiling point, and means for cooling water extracted from the chamber 6 and supplying it to a boiler. The water supply to a storage tank 2 is regulated by a valve 3 controlled by a water level sensing device 2a. From the tank 2 water passes to the deaerating chamber via a conduit 10 and steam-operated injector 4, and is heated to boiling point by steam entering the chamber 6 through line 7. A valve 5 sensitive to the water level in the chamber 6 controls the steam entering the injector through line 12. Deaerated water leaves the chamber through conduit 13 and is cooled by heat exchange with water in conduit 10 to a temperature commensurate with the vapour pressure required by the multi-stage boiler feed pump 9,
-
公开(公告)号：DK134359B
公开(公告)日：1976-10-25
申请号：DK180172
申请日：1972-04-13
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
-
Patent Agency Ranking
公开(公告)号：AU4301672A
公开(公告)日：1973-12-06
申请号：AU4301672
申请日：1972-06-01
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
IPC: F01D25/18 , F01D25/20 , F04D29/04 , F04D29/041 , F04D29/047 , F04D29/06 , F16N7/40 , F16N13/20 , F16N39/02 , F16C35/00
Abstract: Rotodynamic apparatus includes a pair of spaced upper and lower rotodynamic machines such as for example an upper pump and a lower drive turbine for the pump, and upright shafting drivingly interconnecting the machines.
-
公开(公告)号：DE2547113A1
公开(公告)日：1977-09-15
申请号：DE2547113
申请日：1975-10-21
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
Abstract: Rotary pump has a return line (11) connecting the housing (2) with the pump inlet (5), through which line leakage is taken from the housing at reduced pressure and returned to the inlet via a cooler, as in 2217292. The return line leads to a duct (22) which enters the pump inlet in a direction with an axial component. The duct may enter immediately adjacent to the impeller hub (8). There may be a chamber (18) upstream of the duct to reduce the velocity of flow of the leakage fluid. This may be an annular chamber surrounding the impeller shaft (4) at the pump inlet end whilst the duct is a conical annular gap.
-
公开(公告)号：AU4653472A
公开(公告)日：1973-09-27
申请号：AU4653472
申请日：1972-09-11
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
IPC: G05B11/60 , F01K9/02 , F04D15/00 , F04D15/02 , G05B23/00 , G05D13/00 , F04D27/00 , F04B49/00 , F04B49/06 , F22D5/32 , F22D5/18
Abstract: A control system for a pump installation comprising a primary feed back circuit including sensors measuring the fluid discharge pressure of the pump and possibly additionally the fluid flow in the pump discharge and regulating the speed of the pump drive to control said discharge pressure in dependence for example on the pressure requirements of boiler feed, and including additionally a secondary feed back circuit sensing further operating conditions in the pump installation e.g. water and oil pressures. The primary circuit delivers a speed control signal for actuation of control valve means of the pump drive which may be for example a steam turbine, and the secondary circuit is coupled to a gate of the primary circuit whereby in the event of any of the further conditions being unsatisfactory the control signal is interrupted and the pump stopped.
-
公开(公告)号：DE2241658A1
公开(公告)日：1973-03-08
申请号：DE2241658
申请日：1972-08-24
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
Abstract: A rotary-shaft liquid handling machine, for example a centrifugal pump, includes a rotary shaft extending through an opening in a wall of the machine casing, and an annular seal is provided between the shaft and the casing wall to close the opening and has rotor and stator portions on the shaft and casing wall respectively, which portions define an annular clearance. The clearance is comprised by an intermediate chamber and inlet and outlet ducts to and from the chamber, the arrangement being such that pressurized leakage fluid flows through the inlet duct to the chamber wherein the liquid vapourises and expands to inhibit leakage flow through the inlet duct.
-
公开(公告)号：AU4542172A
公开(公告)日：1974-02-14
申请号：AU4542172
申请日：1972-08-09
Applicant: WEIR PUMPS LTD
Inventor： RANDELL FORREST THOMSON
Abstract: A rotary-shaft liquid handling machine, for example a centrifugal pump, includes a rotary shaft extending through an opening in a wall of the machine casing, and an annular seal is provided between the shaft and the casing wall to close the opening and has rotor and stator portions on the shaft and casing wall respectively, which portions define an annular clearance. The clearance is comprised by an intermediate chamber and inlet and outlet ducts to and from the chamber, the arrangement being such that pressurized leakage fluid flows through the inlet duct to the chamber wherein the liquid vapourises and expands to inhibit leakage flow through the inlet duct.
-
-
-
-
-
-
-
-
-
Search Results
13
records
(took 0.093 seconds)
