CN2348151Y

CN2348151Y - Rotary positive displacement Roots oil pump

Info

Publication number: CN2348151Y
Application number: CN 98238917
Authority: CN
Inventors: 徐秀生; 姜春明; 张明玉
Original assignee: DANDONG OIL PUMP PLANT
Current assignee: DANDONG OIL PUMP PLANT
Priority date: 1998-09-19
Filing date: 1998-09-19
Publication date: 1999-11-10
Anticipated expiration: 2008-09-19

Abstract

The utility model relates to a rotary positive displacement roots oil pump comprising a pump case 1, a rear cover 2, a gear housing 3, a bearing cap 4, a bearing press cover 40, a driving shaft 5, a driven shaft 6, a rotor 7, 7', a drive gear 8, 8', a driving shaft 5, a driven shaft 6, and a sealing device 9, 9' for the driving shaft 5 and the driven shaft 6. The utility model is the improvement on the existing technical structure and has the advantages of reasonable structure, good structural entirety, easy manufacture and assemblage, simple and convenient maintenance, loading and unloading, long service life, and is time-saving and labor-saving.

Description

Rotary displacement Roots oil pump

The utility model relates to a kind of oil pump, is a kind of rotary displacement Roots oil pump, is used for the oil pump of industry conveying crude oils such as oil, chemical industry, viscous crude, finished product wet goods medium

Its structure of present rotary displacement Roots oil pump constitutes as shown in Figure 1, include pump case 1, bonnet 2, gear tank tower 3, bearing cap 4, bearing gland 40, driving shaft 5, driven shaft 6, rotor 7,7 ', driving gear 8,8 ', driving shaft 5 and driven shaft 6 seal arrangements 9,9 ' constitutes, gear tank tower 3 is connected the left side end plate 32 of connection by one, middle part support body 33, right-hand member gear housing 34 constitutes, bonnet 2, pump case 1, gear tank tower 3, bearing cap 4, bearing gland 40 docks bolt successively and connects, driving shaft 5, driven shaft 6, two ends install by bearing and bonnet 2 and bearing cap 4 and connect, two rotors that cooperatively interact 7, on the 7 ' driving shaft 5 and driven shaft 6 that is fixedly mounted on respectively in the pump case 1, two intermeshing driving gears 8, on the 8 ' driving shaft 5 and driven shaft 6 that is installed in respectively in the gear housing 34 of gear tank tower 3 right parts, on its right end face 32 ' of the left side of gear tank tower 3 end plate 32, be provided with the axle sleeve 31 that cooperates with driving shaft 5 and driven shaft 6,31 ', at axle sleeve 31, be provided with driving shaft 5 and driven shaft 6 seal arrangements 9 in 31 ', 9 '.The overall structure that its shortcoming deficiency is a pump is unsatisfactory, subject matter one is in the time will repairing the seal arrangement 9,9 ' of driving shaft 5 and driven shaft 6, must will just can carry out behind bearing gland 40, bearing cap 4, bearing, driving gear 8,8 ', gear housing 3, bonnet 2, pump case 1, rotor 7, the 7 ' integral demounting, dismounting extremely bothers, waste time and energy very much, keep in repair very inconvenient; The 2nd, in case seal arrangement 9,9 ' leaks, medium is then direct outside the uncovered 33 ' efflux pump of both sides, gear tank tower 3 middle part support bodys, 33 front and back in the pump, necessary on-call maintenance seal arrangement 9,9 '; The 3rd, the left end of its driving shaft 5 and driven shaft 6 is rotatably assorted by bearing a, a ' with bonnet 2 and connects, this bearing a, a ' rely on the medium of carrying in the pump chamber to lubricate fully, if the medium lubricity of being carried is bad, then directly influence the life-span of this bearing a, a ', and the impurity that contains in the medium further quickens the wear damage of bearing a, a '; The 4th, because distance is distant between the installation bearing supporting point of driving shaft 5 and driven shaft 6, two ends at axle, thereby the rotation amount of deflection of driving shaft 5 and driven shaft 6 is bigger, and further aggravation with the raising of the rotating speed of pump and pressure, thereby to the seal arrangement on driving shaft 5 and the driven shaft 69,9 ' generation ten minutes adverse influence, and sealing device 9,9 ' sealability quality directly have a strong impact on the use of pump, the working pressure that this also is unfavorable for improving simultaneously pump has limited this pump high-voltage applications.

The purpose of this utility model is to improve at the shortcoming deficiency of prior art, provides a kind of rational in infrastructure, and overall structure is good, be convenient to make and maintenance, good sealing effect, and the maintenance loading and unloading are easy, and function admirable, the rotary displacement Roots oil pump that adaptive capacity is strong.

The utility model includes pump case 1, bonnet 2, gear housing 3, bearing cap 4, bearing gland 40, driving shaft 5, driven shaft 6, rotor 7,7 ', driving gear 8,8 ', driving shaft 5 and driven shaft 6 seal arrangements 9,9 ' constitutes, its technical characteristics is: gear housing 3 is the annular cylinder shape of integrally closed, driving shaft 5 and driven shaft 6 are respectively by bearing 50,55/60,85, bearing gland 51/61, Sealing 52/62, bearing cap 4, bearing gland 40 is installed with the two ends of gear housing 3 and is connected, two intermeshing driving gears 8/8 ' are installed in respectively on gear housing 3 interior (right part) driving shafts 5 and the driven shaft 6, right-hand member side at pump case 1 is provided with side end panel 10, one connects the axle sleeve 11 that is provided with outer shroud joint sleeve 12 and cooperates with driving shaft 5 and driven shaft 6 respectively on the end plate 10 of the right side of pump case 1,11 ', the right-hand member of pump case 1 docks bolt by its joint sleeve 12 and connects with the left end of gear housing 3, two rotors that cooperatively interact 7/7 ' are fixedly mounted on respectively on the driving shaft 5 and driven shaft 6 axle heads in the pump case 1, in the axle sleeve 11/11 ' of pump case 1 right-hand end, be respectively arranged with driving shaft 5 and driven shaft 6 seal arrangements 9/9 ', on the right side of seal arrangement 9/9 ' driving shaft 5 and driven shaft 6, be fixed with disc 73/73 ' respectively, the inside structure of pump case 1 right side joint sleeve 12 forms and offers inner chamber Q, is provided with the catheter 13 that is communicated with between the filler opening of inner chamber Q and the pump housing 1.

The utility model is rational in infrastructure, and overall structure is good, is convenient to make, assembles, keeps in repair, good sealing effect, and the maintenance loading and unloading are easy, time saving and energy saving, long service life, and function admirable, its advantage also is embodied in: very easy to seal apparatus 9,9 ' maintenance, do not need integral demounting, as long as bonnet 2 is opened, rotor 7,7 ' is unloaded from driving shaft 5 and driven shaft 6, just seal arrangement 9,9 ' can be pulled down and keep in repair; In case seal arrangement 9,9 ' produces and leaks, flow into the inner chamber Q through the media fluid that is transferred that seal arrangement 9,9 ' leaks out from pump chamber, by catheter 13, liquid among the inner chamber Q is sucked in its filler opening by pump self, medium can not leak out outside the pump, therefore it can prolong seal arrangement 9, spreadable life of 9 ', and reduces seal arrangement 9,9 ' maintenance, prolongs maintenance interval;

Whole bearings

50,55,60,65 of driving shaft 5 and driven shaft 6 all are in the gear housing 3, fully by the oil lubrication in the gear housing 3, the sand grains impurity of having eliminated in its medium of prior art structure enters in the bearing of driving shaft 5 and driven shaft 6, the shortcoming of the heavy wear that bearing is produced, the little life-span of bearing wear of driving shaft 5 and driven shaft 6 is long; Because the bearing supporting point gap ratio of driving shaft 5 and driven shaft 6 is nearer, and divide spacing cloth reasonable, thereby the rotation amount of deflection of driving shaft 5 and driven shaft 6 is less, helps improving the working pressure and the power of pump; Because the rotation amount of deflection of driving shaft 5 and driven shaft 6 is less, and seal arrangement 9,9 ' leans on bearing supporting point close together, very favourable to the seal arrangement on driving shaft 5 and the driven shaft 69,9 ' sealing, can further guarantee and prolong seal arrangement 9,9 ' sealing

Fig. 1 is prior art oil pump structure figure

Fig. 2 is the utility model example structure schematic representation

Fig. 3 is the A-A sectional view of Fig. 2

Embodiment describes the utility model below in conjunction with accompanying drawing

Referring to accompanying drawing 2, shown in 3, the utility model includes pump case 1, bonnet 2, gear housing 3, bearing cap 4, bearing gland 40, driving shaft 5, driven shaft 6, rotor 7,7 ', driving gear 8,8 ', driving shaft 5 and driven shaft 6 seal arrangements 9,9 ' constitutes, it is characterized in that: gear housing 3 is the annular cylinder shape of integrally closed, driving shaft 5 and driven shaft 6 are respectively by bearing 50,55/60,65, bearing gland 51/61, Sealing 52/62, bearing cap 4, bearing gland 40 is installed with the two ends, the left and right sides of gear housing 3 and is connected, shown in the accompanying drawing embodiment, bearing cap 4 cooperates with the right-hand member seam of gear housing 3 and is fixedly mounted in gear housing 3 right output port, bearing gland 40 docks bolt and connects with the right side of gear housing 3, two intermeshing driving gears 8/8 ' are installed in respectively on gear housing 3 interior right part driving shafts 5 and the driven shaft 6, right-hand member side at pump case 1 is integrally formed with side end panel 10, the axle sleeve 11 that on the right side of pump case 1 end plate 10, is integrally formed with outer shroud joint sleeve 12 and cooperates with driving shaft 5 and driven shaft 6 respectively, 11 ', the right-hand member of pump case 1 docks bolt by its joint sleeve 12 and connects with the left end of gear housing 3, rotor 7,7 ' shape can be single leaf formula, double-valve type, or leafy formula rotor, two rotors 7/7 ' that cooperatively interact are by set screw 70/70 ', packing ring 71/71 ', retainingf key 72/72 ' is fixedly mounted on respectively on the driving shaft 5 and driven shaft 6 axle heads in the pump case 1, bonnet 2 is fixedly connected by the left end of bolt and pump case 1, in the axle sleeve 11/11 ' of the right-hand end of pump case 1, be respectively arranged with driving shaft 5 and driven shaft 6 seal arrangements 9/9 ', sealing device 9,9 ' can be various forms of mechanical seal device, or O shape seal with elastometic washer device, the also seal arrangement of other structural type, on the right side of seal arrangement 9/9 ' driving shaft 5 and driven shaft 6, be fixed with disc 73/73 ' respectively, its effect is to prevent seal arrangement 9, medium splashed when 9 ' generation was leaked, and prevent medium directly splash driving shaft 5 and driven shaft 6 bearing glands 51, outside framework oil seal 52 in 61,62, slow down outside

framework oil seal

52,62 pressure, inside structure at pump case 1 right-hand member joint sleeve 12 is formed with inner chamber Q, between the filler opening of inner chamber Q and the pump housing 1, be provided with the catheter 13 that is communicated with, on catheter 13, can be provided with stop valve, because but this pump is a two-way choice oil inlet and outlet direction, so can between two mouthfuls of the turnover oil of Q chamber and the pump housing 1, be respectively equipped with the catheter 13 that is communicated with, 13 ', and at two catheters 13, be equipped with stop valve on 13 ', selective use.

Claims

1, a kind of rotary displacement Roots oil pump, by pump case (1), bonnet (2), gear housing (3), bearing cap (4), bearing gland (40), driving shaft (5), driven shaft (6), rotor (7,7 '), driving gear (8,8 '), driving shaft (5) and driven shaft (6) seal arrangement (9,9 ') constitute, it is characterized in that: gear housing 3 is the annular cylinder shape of integrally closed, driving shaft (5) and driven shaft (6) are respectively by bearing (50,55/60,65), bearing gland (51/61), Sealing (52/62), bearing cap (4), bearing gland (40) is installed with the two ends, the left and right sides of gear housing (3) and is connected, two intermeshing driving gears (8/8 ') are installed in respectively on gear housing (3) interior right part driving shaft (5) and the driven shaft (6), right-hand member side at pump case (1) is provided with side end panel (10), the axle sleeve (11 that on the right-hand end utmost point (10) of pump case 1, is integrally formed with outer shroud joint sleeve (12) and cooperates with driving shaft (5) and driven shaft (6) respectively, 11 '), the right-hand member of pump case (1) docks bolt by its joint sleeve (12) and connects with the left end of gear housing (3), two rotors (7/7 ') that cooperatively interact are fixedly mounted on respectively on pump case (1) the interior driving shaft (5) and driven shaft (6) axle head, bonnet (2) is fixedly connected by the left end of bolt and pump case (1), in the axle sleeve (11/11 ') of pump case (1) right-hand end, be respectively arranged with driving shaft (5) and driven shaft (6) seal arrangements (9/9 '), on the right side of seal arrangement (9/9 ') driving shaft (5) and driven shaft (6), be fixed with disc (73/73 ') respectively, joint sleeve (12) inside structure at pump case (1) right-hand member is formed with inner chamber (Q), is provided with the catheter (13) that is communicated with between the filler opening of inner chamber (Q) and the pump housing (1).

2, according to claim 1 time special positive displacement Roots's oil pump is characterized in that:

A, bearing cap (4) cooperate with the right-hand member seam of gear housing (3) and are fixedly mounted in gear housing (3) right output port, and bearing gland (40) docks bolt and connects with the right side of gear housing (3);

B, two rotors (7/7 ') that cooperatively interact are fixedly mounted on respectively on pump case (1) the interior driving shaft (5) and driven shaft (6) axle head by set screw (70/70 '), packing ring (71/71 '), retainingf key (72/72 ').

3, according to claim 1 or 2 fast rotary displacement Roots oil pump, it is characterized in that: seal arrangement (9,9 ') is a mechanical seal device, or O shape seal with elastometic washer device; Catheter (13) is provided with stop valve.