CN2228136Y

CN2228136Y - External regulating oil positive correcting unit of mechanical centrifugal governor in fuel-injection pump

Info

Publication number: CN2228136Y
Application number: CN 95209057
Authority: CN
Inventors: 鲍守威
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-19
Filing date: 1995-04-19
Publication date: 1996-05-29
Anticipated expiration: 2005-04-19

Abstract

The utility model relates to an external regulating oil-flow positive correcting unit of a mechanical centrifugal governor in fuel-injection pump for diesel engines, comprising a sliding bush, a positive correcting spring and regulating nuts. The utility model is characterized in that the external regulating oil-flow positive correcting unit of a mechanical centrifugal governor in fuel-injection pump for diesel engines also comprises an oil-flow place-limiting socket sleeve which is arranged by screws on a back cover wall of the speed governor and extends out outwards. The oil-flow place-limiting socket sleeve is provided with stepped holes which are composed of large holes and small holes which form a shoulder surface. The utility model also comprises a soft fulcrum screw which is provided with a head part and a screw rod part which form a shoulder and is abutted on the right end of the socket sleeve and the inner bottom surface of the sliding bush. A stroke control screw sleeve of the utility model is screwed and matched with the oil-flow place-limiting socket sleeve, and a correcting spring and the regulating nuts are abutted on the screw rod part which is arranged on the leftward part of the shoulder. The external regulating oil-flow positive correcting unit of a mechanical centrifugal governor in fuel-injection pump for diesel engines has the advantage that the utility model can be conveniently and reliably adjusted without disassembling the back cover.

Description

The external regulation type oil mass positive correction device of Injection Pump machinery centrifugal governor

The utility model relates to a kind of mechanical centrifugal governor of diesel injection pump, relates to a kind of oil mass positive correction device of mechanical centrifugal governor specifically.

At present on the diesel engine oil mass positive correction device structure of the most frequently used several Injection Pumps machinery centrifugal governors as shown in Figure 1, 2, 3, in use all there are some problems in they.Speed regulator oil mass positive correction device shown in Figure 1 must be pulled down the speed regulator back cover and just can finish when changing correcting spring 4 or adjusting correction stroke, have influence on correction stroke when adjusting the correcting spring pretightening force, and levelling has influence on the pretightening force of spring during correction stroke, so adjust relatively more difficult and be difficult for reaching requirement; Though another kind of speed regulator oil mass positive correction device shown in Figure 2 need not be pulled down the pretightening force that the speed regulator back cover just can be adjusted correction stroke and correcting spring 4, but when changing correcting spring 4, still need pull down the speed regulator back cover, and it is unstable and be difficult for reaching requirement when controlling the maximum torque point oil mass with the methods that spacing spiral shell colludes 19 restriction sliding sleeves 5 displacements, when spacing spiral shell collude 19 fixing after, when pump speed was lower than the torque point rotating speed, oil mass loseed and reduces even also can increase; Another oil mass positive correction device shown in Figure 3 all need be pulled down the speed regulator back cover when carrying out various adjustment and change correcting spring 4, though can the effect correction stroke when adjusting initial tension of spring, in the time of adjusting correction stroke, pull down correcting spring.

The purpose of this utility model is to overcome existing the problems referred to above in the oil mass positive correction device that has Injection Pump, provides a kind of and need not dismantle the oil mass positive correction device that does not interact when the speed regulator back cover can be adjusted the pretightening force of correcting spring, correction stroke or replacing correcting spring easily and adjust initial tension of spring and correction stroke and can reach the Injection Pump machinery centrifugal governor of regulation requirement reliably.

The purpose of this utility model is to realize by a kind of oil mass positive correction device with external regulation type structure, it comprises: one is located at sliding sleeve and a correcting spring and the adjusting nut in the shell wall behind the speed regulator, be characterized in, it also comprises: an oil quantity limited seat sleeve, be arranged on the shell wall of described back and extend outward, be formed with the stepped shaft endoporus that a left end macropore that is communicated with by coaxial line and right-hand member aperture are formed, form a circular bead surface thus; One soft pivot screw passes described oil quantity limited seat sleeve, and it is made up of a head and a screw part, and described head and screw rod form a shoulder, on the inner bottom surface of described shoulder by the right side that is located at described cover for seat and described sliding sleeve; The one stroke Adjusting bolt Adjusting screw, being equipped with just with described oil quantity limited seat sleeve phase spiral shell can relative respectively its precession or screw out to reduce or to strengthen correction stroke; Described correcting spring, adjusting nut are successively set on the screw part of screw of described cover for seat circular bead surface left.

Adopt above-mentioned external regulation type oil mass positive correction device of the present utility model, compare with the various oil mass positive correction devices of prior art, its advantage is: because the adjusting of this oil mass positive correction device part all is located at behind the speed regulator outside the shell wall, when adjusting, need not dismantle the speed regulator back cover, and it is easy to adjust reliable, reach the rotating speed of maximum torque point and the requirement of oil mass easily, thereby obtain desirable adjustment effect; It is simple in structure in addition, processing and fabricating convenient.

Now the purpose of this utility model is described, characteristics and advantage by specific embodiments more of the present utility model.

Fig. 1 to Fig. 3 is the schematic representation of oil mass positive correction device of three kinds of typical structures of prior art;

Fig. 4 is an an embodiment's of the present utility model longitudinal section;

Fig. 5 to Fig. 7 is respectively other embodiment's of the present utility model structural representation.

As shown in Figure 4, this embodiment comprises: a sliding sleeve 5; One oil quantity limited seat sleeve 7, it is arranged in behind the speed regulator on the shell wall by its outside thread wall and extends left, wherein be formed with a ladder endoporus, this endoporus comprises left end macropore and the right-hand member aperture that is communicated with of coaxial line with it, form a circular bead surface between macropore and the aperture, described sliding sleeve 5 is set on the right-hand member of described cover for seat 7; Be located in the interior soft pivot screw 6 of shoulder hole of described block set 7, form with a head 15 and a screw portion along the axis adjacent, screw portion is made up of the first polished rod section 6 ', first thread section 16, the second polished rod section 17 and second thread section 18, described first polished rod section 6 ' and head 15 and the second polished rod section 17 and second thread section 18 form first shoulder and second shoulder respectively, and head 15 is respectively by being located on described cover for seat 7 right sides and sliding sleeve 5 inner bottom surfaces 5 '; The adjacent successively first polished rod section 6 ' and the correcting spring 4 on first thread section 16, plain washer 8 (can omit) and the adjusting nut 9 (being two in this example) that is located at described circular bead surface left; The one location swivel nut of forming by a cylindrical body screw thread perisporium and a diapire 12, the endoporus that is formed on the hole on the described diapire coaxial line and is communicated with it, described location swivel nut 12 is joined by described hole and second thread section, 18 covers, and abuts against on described second shoulder by described diapire face; One spiral shell fits over and is used on second thread section 18 and the locking nut 14 of tight described location swivel nut 12 and the spring washer 13 between them; One stroke Adjusting bolt Adjusting screw 10 is formed with the inner bolt hole and the unthreaded hole that are interconnected, joins and is set in outside described plain washer 8 and the adjusting nut 9 with the screw thread perisporium spiral shell of location swivel nut 12 respectively; And a helmet 1, be formed with an open lumen, the nearly open end portion of inner chamber forms thread section, be used for the outside thread wall of described spacing cover for seat 7 mutually spiral shell join.

This external regulation type oil corrector is after adjusting, when rated speed and corresponding specified oil mass, the soft fulcrum of oil mass positive correction device (be the head of screw 6 with at the bottom of the sliding sleeve contacting part) just contacts with sliding sleeve 5, this moment correcting spring 4 except that pretightening force not by compression, when dropping to the maximum torque point rotating speed, the end face of stroke adjustment swivel nut 10 contacts with the end face (hard fulcrum) that oil mass limits cover for seat 7, this moment, correction stroke was all over, the governor control characteristics of diesel engine is compared no change when not being with the positive correction device like this, and the fuel delivery of Injection Pump reduces when being lower than speed at maximum torque at once.The rotating speed of maximum torque point is decided by the rigidity and the pretightening force thereof of correcting spring 4, and the correction oil mass of maximum torque point is decided by the correction stroke of positive correction device, and the adjustment of described pretightening force and correction stroke is not disturbed mutually; The correcting spring of changing different-stiffness is convenient, and all adjusts or the replacing process all can be finished in the speed regulator outside and need not dismantle the speed regulator back cover.

Its concrete adjustment process is as follows: as shown in Figure 4, an end of oil quantity limited seat sleeve 7 is hard fulcrum, pulls down helmet 1 during adjustment, back-outs or is screwed into stroke adjustment swivel nut 10, can strengthen or reduce correction stroke respectively; But after correction stroke is adjusted, and tight locking nut 11, stroke adjustment swivel nut 10 is fixed on the swivel nut 12 of location; When locating after swivel nut 12, stroke adjustment swivel nut 10 pull down soft pivot screw 6 together as assembly, be replaceable correcting spring 4 or the pretightening force of adjusting correcting spring 4, after adjusting, promptly lock adjusting nut 9, refill location swivel nut 12 and stroke adjustment swivel nut 10 assemblies, because installing and locating swivel nut 12 is that second shoulder with soft spots screw 6 is as the location, therefore locate after swivel nut 12 repeats mounting or dismounting, the invariant position of stroke adjustment swivel nut 10, thus make correction stroke unaffected.

Fig. 5 to Fig. 7 is other embodiment's of an external regulation type oil mass positive correction device of the present utility model structural representation, and all and identical parts Fig. 4 embodiment all use same label to represent in these accompanying drawings, and the label of some part is omitted.

Fig. 5 and 6 is depicted as other two kinds of external regulation type oil mass positive correction device structures of the present utility model.They are compared with Fig. 4 structure, have saved locking nut 11,14 and location swivel nut 12; Its correction stroke is between the end face of packing ring 8 and stroke adjustment swivel nut 10, when adjusting correction stroke, effect correction initial tension of spring not, when adjusting the correcting spring pretightening force, correction stroke will be adjusted accordingly, and its advantage is that structure is more simple, part is less, simultaneously owing to pull down helmet post-equalization stroke and expose in speed regulator back cover outside (having pulled down helmet in the drawings), can measure thereby adjust also very convenient, but their radially boundary dimension is slightly larger than the structure of Fig. 4.

Figure 7 shows that another embodiment of the present utility model, its function is with embodiment illustrated in fig. 4 identical, its structure does not exist together: stroke adjustment swivel nut 10 by its inner bolt hole directly with the threaded outer wall of oil quantity limited seat sleeve 7 mutually spiral shell join, it is to finish with respect to the spacing of location swivel nut 12 by adjustment stroke Adjusting bolt Adjusting screw 10 that its correction stroke is regulated, compare with Fig. 4 structure, part number is less and to adjust effect identical, and only radially boundary dimension is more bigger.

Claims

1. external regulation type oil mass positive correction device that is used for diesel injection pump machinery centrifugal governor; It comprises:

One is located at sliding sleeve (5) and a correcting spring (4) and the adjusting nut (9) in the shell wall behind the speed regulator; It is characterized in that, also comprise:

One oil quantity limited seat sleeve (7), it is arranged on the shell wall of described back and extends outward, and is formed with the stepped shaft endoporus that a left end macropore that is communicated with by coaxial line and right-hand member aperture are formed, and forms a circular bead surface thus;

One soft pivot screw (6) passes described oil mass and limits cover for seat (7), is made up of a head (15) and a screw part, and described head and screw rod form a shoulder, and described shoulder leans against on the inner bottom surface of described cover for seat (7) right side and described sliding sleeve (5);

One stroke Adjusting bolt Adjusting screw (10) can be with respect to cover for seat (7) precession or screw out to reduce or to strengthen correction stroke respectively;

Described correcting spring (4), adjusting nut (9) are successively set on the screw part of described screw (6) of described cover for seat (7) circular bead surface left.

2. the described external regulation type oil mass of claim 1 positive correction device is characterized in that, described screw part comprises one first polished rod section (6 '), one first thread section (16), one second polished rod section (17) and one second thread section (18); The described second polished rod section (17) forms one second shoulder with described second thread section (18); It also comprises a location swivel nut (12) of being made up of cylindrical body screw thread perisporium and diapire, the endoporus that is formed on the hole on the described diapire coaxial line and is communicated with it, described location swivel nut (12) is joined by described hole and described second thread section (18) cover and is abutted against on second shoulder by described wall.

3. external regulation type oil mass positive correction device as claimed in claim 2 is characterized in that, it comprises also that a spiral shell fits over and is used on second thread section (18) and first locking nut (14) of tight described location swivel nut (12) and the spring washer (13) between them.