CN2809376Y

CN2809376Y - Externally regulating type seal oil pressure regulating valve

Info

Publication number: CN2809376Y
Application number: CNU2005200183668U
Authority: CN
Inventors: 刘敬善
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-09
Filing date: 2005-05-09
Publication date: 2006-08-23
Anticipated expiration: 2015-05-09

Abstract

The utility model relates to a sealing-oil pressure regulating valve of an outer-regulating type, which is used for the automatic control of the sealing oil of a hydrogen-cooling generator group. The valve is composed of a valve body, a valve core, a balance weight sheet and a pressure difference outer-regulating mechanism, wherein a flow control door is formed by matching a cone lug boss at the middle part of the valve core and a door base hole, the upper part of the valve core is provided with the balance weight sheet to ensure that the valve can output the oil pressure which is higher than the lower limit of the rated pressure difference of the hydrogen pressure in operation and the central position at the upper end of the valve core is provided with a spring. A regulating rod which rotates and extends out of the outer part of a valve cover can conduct the regulation for the working height of the spring, the valve can conveniently regulate the pressure difference at the outer part in operation according to the needs. Meanwhile, the valve realizes the omnidistance tracking from zero hydrogen pressure to rated hydrogen pressure and the valve can still reliably work when the regulating mechanism of the spring appears faults or the spring breaks.

Description

External regulation type sealing oil pressure modulating valve

Technical field

The utility model relates to a kind of hydrogen cooled generator group sealing oil automatic controller, particularly a kind of external regulation type sealing oil pressure modulating valve.

Background technique

Be full of hydrogen in the hydrogen cooled generator with certain pressure, for hydrogen is overflowed, set up the sealing oil pressure of a ring type at the generator amature axle head, the effect of pressure regulator valve is that control sealing oil pressure is higher than hydrogen one rating number all the time, sealing oil is forced down hydrogen gas leakage is taken place when this rating number easily, again can oil-feed in generator when being higher than this rating number, can adjust pressure reduction accurately and conveniently so require pressure regulator valve, the pressure reduction of the employed pressure regulator valve of power plant is regulated now dual mode, a kind of is old-fashioned pressure regulator valve, subtract Weight stack by dress fully and adjust pressure reduction, another kind is the pressure regulator valve of being adjusted pressure reduction fully by spring of imitative US Westinghouse company.There is different defectives in two kinds of pressure regulator valves, fully subtracting Weight stack by dress adjusts the mode of pressure reduction and adjusts cumbersome, because can not be in operation adjustment, must be during adjustment with pressure regulator valve excision operation, put into operation again after the adjustment, sometimes in order to adjust to suitable pressure reduction, want repeatable operation several all over just finishing, and the pressure regulator valve of fully adjusting pressure reduction by spring can not be realized by the all-the-way tracking of zero hydrogen pressure to specified hydrogen pressure, because to the height of the process spring of specified hydrogen pressure very big variation has taken place by zero hydrogen pressure, so error is also bigger.Spring breakage or adjustment member break down if be in operation in addition, will have a strong impact on the safe operation of unit.

Summary of the invention

In order to overcome the defective of existing pressure regulator valve, the utility model provides a kind of external regulation type sealing oil pressure modulating valve, and this valve can realize that by the all-the-way tracking of zero hydrogen pressure to specified hydrogen pressure, the convenient pressure reduction of adjusting accurately can be in operation again.

The utility model is achieved in the following manner: external regulation type sealing oil pressure modulating valve is by valve body, valve gap, spool, Weight stack, spring, critical pieces such as adjustable lever are formed, valve body 1 is provided with oil inlet hole 18 successively, inlet space 10, gate seat hole 11, go out grease chamber 13, oil outlet 14 (as shown in Figure 1), the middle part of one side of valve body is provided with hydrogen pressure pipe 20 and is communicated with the Weight stack chamber on valve body top by through hole 19, the bottom of valve body one side also is provided with feedback oil pipe 21, feedback oil pipe 21 communicates (as shown in Figure 2) with feedback oil 15, be combined with the spool 9 of control flow rate in the middle of the valve body, Weight stack 8 and spring 7 are equipped with in the top of spool 9, the top of valve body is combined with valve gap 2, the intermediate portion of valve gap is equipped with adjustable lever 3 successively, sliding sleeve 4, cut somebody's hair 5, limiting stopper 6, the bottom of valve body is equipped with base 17, and the extreme lower position that caging bolt 16 falls in order to the restriction spool is installed in the middle of the base.Spool is provided with cylindrical boss and valve body inner bore is movingly in two ends about in the of 9, promptly play seal action, the usefulness of guiding when moving up and down as spool again, be provided with cone boss 12 in the middle of the spool 9, cooperate formation flow control door with valve body gate seat hole 11, the center of the upper end portion of spool is provided with spring seat, and spring 7 is that the center hole by Weight stack 8 is placed in the spring seat.Adjustable lever 3 first halves of installing in the middle of the valve gap 2 stretch out the outside at valve gap, more steady in order to adjust, 7 on spring is produced downward power, and without spin and frictional force, the bottom of regulating lever 3 not directly to contact with spring, but be threaded with sliding sleeve 4 endoporus, the external diameter of sliding sleeve 4 and valve gap endoporus are movingly, and limiting stopper 6 is fixed on the bottom of valve gap, rotation regulating lever 3, sliding sleeve 4 only moves up and down under the restriction of limiting stopper 6, and by 5 working depths of adjusting springs of cutting somebody's hair.

Concrete working principle is as follows: oil inlet hole 18 is connect the oil pump outlet, oil outlet 14 connects sealing bearing bush, hydrogen pressure pipe 20 sending and receiving motor Hydrogen Vapor Pressures (as shown in Figure 2), feedback oilhole 21 connects sealing bearing bush feedback oil pipe, the pressure oil of oil pump output is successively through oil inlet pipe 18, inlet space 10, gate seat hole 11, go out grease chamber 13, oil outlet 14 enters sealing bearing bush, the feedback oil pressure of being drawn by sealing bearing bush enters feedback oil 15 through feedback oilhole 21, this oil pressure produces power upwards in the bottom of spool, reach balance with the Hydrogen Vapor Pressure interaction on spool 9 tops, equilibrium conditions is: the power that the feedback oil pressure acts on the spool bottom equals Hydrogen Vapor Pressure, spool and Weight stack weight and spring working pressure act on the sum total of the power on spool top, that is to say through the oil pressure of this valve output pressure greater than hydrogen, its pressure difference is by spool, Weight stack weight and spring working pressure form, spool and Weight stack produce the lower limit of rated differential head in the utility model, promptly satisfy the primary condition of operation, the adjustable scope of spring is between the lower limit and the upper limit of rated differential head, the scope of adjusting is smaller, so can be very not big in zero error to spring generation between the specified hydrogen pressure yet, when spring breaks down, the pressure reduction that is produced by spool and Weight stack weight also can satisfy the basic demand of operation, and this is one of this valve major character.

The beneficial effects of the utility model are, owing to adopt Weight stack as the condition that forms the rated differential head lower limit, so this valve also can satisfy the basic demand of operation without Regulation spring pressure the time, when in service when wishing as required to obtain desirable pressure reduction, the observation gauge pressure that can be in operation is very easily again adjusted pressure reduction, and also can not influence operation when spring breaks down.

Description of drawings

Fig. 1 is an external regulation type sealing oil pressure modulating valve plan view

Fig. 2 is an external regulation type sealing oil pressure modulating valve left view

Sequence number wherein: 1 valve body, 2 valve gaps, 3 adjustable levers, 4 sliding sleeves, 5 are cut somebody's hair, 6 limiting stoppers, 7 springs, 8 Weight stacks, 9 spools, 10 inlet space, 11 gate seat holes, 12 cone boss, 13 go out grease chamber, 14 oil outlets, 15 feedback oil, 16 position-limited levers, 17 bases, 18 oil inlet holes, 19 through holes, 20 hydrogen pressure pipes, 21 feedback oil pipes

Embodiment

Shown in Fig. 1-2, a kind of external regulation type sealing oil pressure modulating valve, valve body is provided with oil inlet hole 18, and be provided with inlet space 10 successively, gate seat hole 11, go out grease chamber 13, oil outlet 14, one side of valve body also is provided with hydrogen pressure pipe 20 and feedback oil pipe 21, wherein hydrogen pressure pipe 20 is communicated with the Weight stack chamber on valve body top by through hole 19, feedback oil pipe 21 communicates with feedback oil 15, valve inner is combined with spool 9, the two ends up and down of spool 9 are provided with cylindrical boss and cooperate with valve body inner bore and can slide up and down the formation sealing surface, the intermediate portion of spool is provided with cone boss 12 and cooperates the formation control gate with the gate seat hole 11 of valve body, Weight stack 8 is installed in the upper end portion of spool, the center, upper end portion of spool also is provided with spring seat and disposes spring 7, valve gap 2 is installed on the top of valve body, the centre of valve gap is combined with adjustable lever 3, adjustable lever 3 and sliding sleeve 4 screw-thread fit, valve pocket 4 can only slide up and down under the control of limiting stopper 6, rotation adjustable lever 3 valve pockets 4 slide up and down and the working depth by 5 Regulation springs of cutting somebody's hair, the bottom of valve body is furnished with base 17, the centre of base 17 is provided with holding down bolt 16, the extreme lower position that the restriction spool falls.

Claims

1, a kind of external regulation type sealing oil pressure modulating valve, comprise valve body, valve gap, spool, Weight stack, spring, adjustable lever, it is characterized in that: valve body (1) is provided with oil inlet hole (18) successively, inlet space (10), gate seat hole (11), go out grease chamber (13), oil outlet (14), the middle part of one side of valve body is provided with hydrogen pressure pipe (20) and is communicated with the Weight stack chamber on valve body top by through hole (19), the bottom of valve body one side also is provided with feedback oil pipe (21), feedback oil pipe (21) communicates with feedback oil (15), be combined with the spool (9) of control flow rate in the middle of the valve body, Weight stack (8) and spring (7) are equipped with in the top of spool (9), the top of valve body is combined with valve gap (2), the intermediate portion of valve gap (2) is equipped with adjustable lever (3) successively, sliding sleeve (4), cut somebody's hair (5), limiting stopper (6), the bottom of valve body is equipped with base (17), and caging bolt (16) is installed in the middle of the base.

2, according to the described external regulation type sealing oil pressure of claim 1 modulating valve, it is characterized in that: spool (9) two ends up and down is provided with cylindrical boss and valve body inner bore is movingly, the centre is provided with cone boss (12) and cooperates with valve body gate seat hole (11), the center of the upper end portion of spool (9) is provided with spring seat, and spring (7) is placed in the spring seat by the center hole of Weight stack (8).

3, according to the described external regulation type sealing oil pressure of claim 1 modulating valve, it is characterized in that: the centre of valve gap (2) is equipped with adjustable lever (3), the first half of adjustable lever (3) stretches out the outside at valve gap, Lower Half and sliding sleeve (4) endoporus is threaded, the external diameter and the valve gap endoporus of sliding sleeve (4) are movingly, and limiting stopper (6) is fixed on the bottom of valve gap.