CN201068835Y

CN201068835Y - Heavy pressure jacking device

Info

Publication number: CN201068835Y
Application number: CNU2007200971650U
Authority: CN
Inventors: 陶捍列; 单庆臣; 马恩君; 张志斌
Original assignee: Tianjin Tianfa Heavy Hydropower Equipment Manufacturing Co Ltd
Current assignee: Tianjin Tianfa Heavy Hydropower Equipment Manufacturing Co Ltd
Priority date: 2007-08-22
Filing date: 2007-08-22
Publication date: 2008-06-04
Anticipated expiration: 2017-08-22

Abstract

The utility model relates to a novel high-pressure jacking device, which is characterized in that the device comprises a main high pressure jacking pump and a standby high pressure jacking pump, and the main high pressure jacking pump uses an AC drive motor, while the standby high pressure jacking pump uses a DC drive motor. The utility model adopts a structure in which a main high pressure jacking pump is driven by an AC drive motor and a standby high pressure jacking pump is driven by a DC drive motor, the high pressure oil pump can not get out of control when the service power is off, therefore the tile burning failure is avoided, the damage to a combination bearing and a turbine guide bearing is reduced, the safety of a machine set is improved significantly, and the difficult problem of a high pressure oil pump getting out of control due to the off of the service power is solved thoroughly.

Description

A kind of novel high pressure jacking system

Technical field

The utility model relates to hydraulic generator unit lubrication system, particularly a kind of novel high pressure jacking system.

Background technique

At present; driving high pressure jack-up oil pump pattern relatively more commonly used in the bulb through-flow unit lubrication system is two AC motor; one main one is fully standby each other; high pressure oil pump is mainly used in unit and prepares to drop in start and the stopping process; especially in stopping process; when sending, central control chamber shuts down order; when needing to drop into high pressure jack-up; the chance station service disappears; two AC motor that cause driving high pressure jack-up oil pump all can not be worked, and high pressure jack-up can not be dropped into, and this process is in slow-speed of revolution district; easily produce dry friction between bearing and the bearing shell, the tile kilning phenomenon occurs.

Summary of the invention

The utility model provides a kind of novel high pressure jacking system that can normally drop into for solving the technical problem that exists in the known technology under the situation that station service disappears.

The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of novel high pressure jacking system, comprise that a high pressure jack-up main pump and a high pressure jack-up are equipped with pump, the drive motor of high pressure jack-up main pump is an AC motor, and the drive motor that described high pressure jack-up is equipped with pump is a direct current generator.

Advantage and the good effect that the utlity model has are: because the utility model has adopted an AC motor to drive a high pressure main pump simultaneously and high pressure of a direct current generator driving is equipped with pump structure, high pressure oil pump just out-of-control phenomenon can not occur, thereby avoided the tile kilning phenomenon, reduced damage to combination bearing and water pilot bearing, improved the Security of unit widely, and thoroughly solved because of station service disappears and cause a high-pressure service pump difficult problem out of control.

Description of drawings

Fig. 1 uses hydraulic scheme of the present utility model in the bulb through-flow unit lubrication system;

Fig. 2 is a workflow diagram of using the utility model start;

Fig. 3 is a workflow diagram of using the utility model shutdown.

Embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

See also Fig. 1, Fig. 1 uses hydraulic scheme of the present utility model in the bulb through-flow unit lubrication system, the motor that drives high pressure oil pump adopts one to hand over form always, because the rated speed of bulb through-flow unit is low, rotary inertia is little, especially the compressor emergency shutdown time lacks, and rotation speed change is fast, is the reliability that guarantees work, native system adopts two kinds of motors to drive two high pressure oil pumps respectively, and one is the work oil pump 2 that AC motor 1 drives; Another is the stand by pump 4 that direct current generator 3 drives, this two pumps can switch mutually, under special circumstances, two pumps is short-term operation simultaneously also, concrete working pressure value will be determined according to unit jack-up part weight, control by pressure inverting controller 11, regulate by ball valve 7, if system works pressure opens the safety-valve automatically when surpassing permitted value and 5 oil entered oil sump tank, the direction of one-way valve 6 control oil streams is for the proper functioning that does not influence system is furnished with 10 two of bitubular net sheet type filters, one of a job is standby, when filter screen stops up, report to the police by differential pressure switch 9 controls, but the voltage at pressure gauge 8 terrains observation filter two ends.

See also Fig. 2, Fig. 3; high pressure oil jack-up can be divided under three kinds of situations and dropped into: one, start shooting under the normal condition; see also Fig. 2, start just drops into high pressure oil jack-up when preparing, and whether the pressure when detecting high pressure oil jack-up is normal; if the undesired startup emergency bearing oil pump that needs; when pressure reaches normal value, stand by pump quits work automatically, needs to report to the police and shutdown inspection if pressure continues to descend; if pressure program normally then below carrying out, excision high pressure oil jack-up when generating unit speed rises to 95% rated speed.Two, shut down under the normal condition, see also Fig. 3, after ordinary circumstance is the circuit breaker tripping, when rotating speed reaches 95% rated speed, drop into high pressure oil jack-up, up to unit stop operating fully and the 1min that delays time after withdraw from high pressure oil jack-up.When three, accidental shutdown appearred in unit, workflow saw also Fig. 3.The accidental shutdown no matter which kind of reason causes all will drop into high pressure oil jack-up immediately, withdraws from high pressure oil jack-up after unit safety stops operating and delay time 1min.From above situation as can be known; high pressure oil jack-up plays crucial effects in unit; especially extremely important in the stopping process; disappear if station service is an Ac, and the utility model possesses a direct current generator driving high pressure oil pump, out-of-control phenomenon just can not appear in high pressure oil pump; thereby avoided the tile kilning phenomenon; reduced damage, improved the Security of unit widely, and thoroughly solved because of station service disappears and cause a high pressure oil pump difficult problem out of control combination bearing and water pilot bearing.

Claims

1. a novel high pressure jacking system comprises that a high pressure jack-up main pump and a high pressure jack-up are equipped with pump, and the drive motor of high pressure jack-up main pump is an AC motor, it is characterized in that: the drive motor that described high pressure jack-up is equipped with pump is a direct current generator.