CN2154923Y

CN2154923Y - Wear-less gear pump

Info

Publication number: CN2154923Y
Application number: CN 93236633
Authority: CN
Inventors: 沈恒; 卢坤国
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-05
Filing date: 1993-04-05
Publication date: 1994-02-02
Anticipated expiration: 2003-04-05

Abstract

The utility model discloses a wear-less gear pump, and is a pump with a type of non-variable capacitance, in particular to an actuating mechanism for controlling the flow amount of liquid with low viscosity in a quantitative mode. One end of a pump casing is connected with an end cover, and the other end of the pump casing is connected with a machine base and one end of a machine cover. The other ends of the machine base and the machine cover are provided with oil tanks, and a main shaft and a driven shaft are respectively installed in a machine casing formed by the machine base and the machine cover by a bearing, a blocking cover and a check ring. A wear-less gear is respectively connected with the main shaft and the driven shaft, and the machine casing between the wear-less gear and the bearing is provided with the main shaft, the sealing ring of the driven shaft and the blocking cover. The main shaft and the driven shaft between the sealing ring and the blocking cover are respectively provided with throwers, and a main shaft and a driven shaft which are positioned in the oil tanks are respectively provided with a shaft boss and gears which are engaged.

Description

Wear-less gear pump

The utility model is a kind of non-varactor pump, particularly a kind of execution machinery of low-viscosity (mobile) liquid flow rate set value control.

Actuator in the existing low-viscosity (mobile) liquid flow rate set value control system mostly adopts pneumatic or electric control valve, adopts governor impeller in the higher fluid flow fixed set point control system of viscosity.By the modulating valve that changes aperture size adjustment flow following problem is arranged generally: the fluid pressurized that 1, will exchange amount of restriction; 2, the modulating valve pressure loss is big during low discharge; 3, have leakage phenomenon, especially when valve rod was subjected to the dead load effect to become curved, leakage rate was bigger; 4, the actuating motor of modulating valve is often because of being operated under the frequent positive-negative rotation state, very easily generates heat and burns out.The speed governing centrifugal pump can only be as big flow, the actuator in the regulating system among a small circle.The timing gear wheel pump is owing to working gear while double as driving gear, so be applicable to the high viscosity liquid Flow-rate adjustment.

The purpose of this utility model provides a kind of design proposal of not having the abrased gear pump, and is simple in structure, can make low-viscosity (mobile) liquid flow rate set value control system have good control effect, and the pump tooth does not have wearing and tearing.

Specific embodiments of the present utility model is: pump case one end of no abrased gear pump closely is connected with end cap, the pump case the other end and support, cover one end closely connects, support, the cover the other end is equipped with fuel tank, tank filler sleeve and oil outlet are arranged on the fuel tank, liquid outlet is arranged above the pump case, there is liquid entering hole the bi-side of pump case, driving shaft and driven shaft pass through bearing respectively, door, back-up ring is contained in the casing of support and cover composition, two no abrased gear keys in the pump case, circlip for shaft respectively with driving shaft, driven shaft connects, driven shaft and driving shaft seal ring are housed in the casing between no abrased gear and the bearing, door, thrower is housed respectively on driven shaft between seal ring and the door and the driving shaft, be positioned on the driving shaft of fuel tank and the driven shaft propeller boss is housed respectively, elastic washer, nut, driving gear is connected with propeller boss, seal ring is equipped with in driving shaft and fuel tank jointing place, seal ring is equipped with gland outward, the tooth of two no abrased gears does not contact, driving gear on the driving shaft and the engagement of the driven gear on the driven shaft, with the leakproof saw shape tooth that has two above hypotenuses towards thrower on the driving shaft of casing built-in ring corresponding part and the driven shaft respectively, support with thrower corresponding position on driving shaft and the driven shaft, the zigzag fashion guiding groove of 3 above hypotenuses towards no abrased gear arranged respectively on the cover, the negative pressure stiffening rib is arranged on the pump case, the negative pressure stiffening rib is positioned between two no abrased gears of liquid entering hole, on the inner side surface of end cap compensating groove is arranged, with on the support of thrower corresponding position collecting annulus is arranged, thrower is frustoconic shape, the upper end of round platform is towards door, the shape of cross section of negative pressure stiffening rib is two-part up and down, the bottom is divided into an inverted isosceles triangle, it is trapezoidal that top is divided into first-class waist, the end of bottom isosceles triangle, overlap with going to the bottom of top isosceles trapezoid, the height of isosceles triangle and the height of isosceles trapezoid equate, the isosceles trapezoid waist be shaped as a no abrased gear top circle segmental arc, waist length be equal to or greater than the long-pending of tangent value that no abrased gear top circle girth multiply by no abrased gear tooth helix angle divided by the merchant and the facewidth of the number of teeth and, upper base length is the modulus of no abrased gear, between support and the cover surface of contact conduction hole is arranged, conduction hole and guiding groove, negative pressuren zone between collecting annulus and the two no abrased gears links to each other.

Major advantage of the present utility model is: the pump tooth does not have wearing and tearing, and structure is simpler, and controllability is good, is comparatively ideal low-viscosity (mobile) liquid Flow-rate adjustment actuator.

Below in conjunction with drawings and Examples the utility model is further specified:

Fig. 1: no abrased gear pump structure diagrammatic sketch,

The A-A sectional view of Fig. 2: Fig. 1,

The B-B sectional view of Fig. 3: Fig. 1,

The C-C sectional view of Fig. 4: Fig. 1,

Fig. 5: support, cover combination diagrammatic sketch,

The D-D sectional view of Fig. 6: Fig. 5,

The E-E sectional view of Fig. 7: Fig. 6,

Fig. 8: the end cap diagrammatic sketch,

The F-F sectional view of Fig. 9: Fig. 8,

The plan view of Figure 10: Fig. 1.

Embodiment:

Pump case 2 one ends of no abrased gear pump (see figure 1) closely are connected with end cap 1, the pump case the other end closely is connected with an end of support 21 and cover 9, the other end of support and cover is equipped with fuel tank 16, tank filler sleeve and oil outlet are arranged on the fuel tank, the port lid 13 of oiling is arranged on the tank filler sleeve, the port lid 33 of draining the oil on the drain oil, liquid outlet 32 is arranged above the pump case, the pump case bi-side have liquid entering hole 31(to see Fig. 2), driving shaft 8 passes through bearing 7 respectively with driven shaft 25, back-up ring 10 is contained in the casing of support and cover composition, place two no abrased gear 3 usefulness keys 19 in the pump case, circlip for shaft 20 respectively with driving shaft 8, driven shaft 25 connects, driven shaft and driving shaft seal ring 4 are housed in the casing between no abrased gear 3 and the bearing 7, connect and cover 6, thrower 5 is housed respectively on driven shaft between seal ring and the door and the driving shaft, be positioned on the driving shaft of fuel tank 16 and the driven shaft propeller boss 11 is housed respectively, elastic washer 14, nut 15, driving gear 12 is connected (see figure 4) with propeller boss 11 usefulness set screws 22, driven gear 23 transfers to two no abrased gears when not contacting by adjusting screw 24, be fixed on the propeller boss with locating stud 26, with on the driving shaft of fuel tank 16 jointing places seal ring 17 is housed, seal ring is equipped with gland 18 outward, the tooth of two no abrased gears does not contact, driving gear 12 and driven gear 23 engagements, the leakproof saw shape tooth of two above hypotenuses towards thrower arranged respectively on driving shaft corresponding with casing inner seal ring 4 and the driven shaft, support with thrower 5 corresponding positions on driving shaft and the driven shaft, there are 3 above hypotenuses to see Fig. 5 on the cover respectively) towards the zigzag fashion guiding groove 29(of no abrased gear, there is negative pressure stiffening rib 28(to see Fig. 2 on the pump case), the negative pressure stiffening rib is positioned at 3 of the two no abrased gears of liquid entering hole, end cap 1(sees Fig. 8) inner side surface on compensating groove 30 is arranged, with on the support of thrower corresponding position collecting annulus 34 is arranged, thrower 5 is frustoconic shape, the upper end of round platform is towards door, negative pressure stiffening rib 28 shape of cross sections are divided into two-part up and down, the bottom is divided into an inverted isosceles triangle, top is divided into isosceles trapezoid, the end of bottom isosceles triangle, overlap with going to the bottom of top isosceles trapezoid, the height of isosceles triangle and the height of isosceles trapezoid equate, the isosceles trapezoid waist be shaped as no abrased gear top circle segmental arc, the long tangent value that multiply by no abrased gear tooth helix angle divided by merchant and the facewidth of the number of teeth for no abrased gear tip circle girth of waist amass with, the length of upper base is the modulus of no abrased gear, have conduction hole 27(to see Fig. 7 between support and the cover surface of contact), conduction hole and guiding groove 29, negative pressuren zone between collecting annulus 34 and the two no abrased gears links to each other.

Claims

1, pump case one end of no abrased gear pump closely is connected with end cap, the pump case the other end and support, cover one end closely connects, support, the cover the other end is equipped with fuel tank, it is characterized in that: driving shaft and driven shaft pass through bearing respectively, door, back-up ring is contained in the casing of support and cover composition, two no abrased gear keys in the pump case, circlip for shaft respectively with driving shaft, driven shaft connects, in the casing between no abrased gear and the bearing driving shaft is housed, the driven shaft seal ring, door, thrower is housed respectively on driven shaft between seal ring and the door and the driving shaft, be positioned on the driving shaft of fuel tank and the driven shaft propeller boss is housed respectively, elastic washer, nut, driving gear is connected with propeller boss, seal ring is equipped with in driving shaft and fuel tank jointing place, the tooth of two no abrased gears does not contact, driving gear on the driving shaft and the engagement of the driven gear on the driven shaft.

2, according to the described no abrased gear pump of claim 1, it is characterized in that: with the leakproof saw shape tooth that has two above hypotenuses towards thrower on the driving shaft of casing built-in ring corresponding part and the driven shaft respectively.

3, according to the described no abrased gear pump of claim 1, it is characterized in that: with on the support of thrower corresponding position on driving shaft and the driven shaft, the cover zigzag fashion guiding groove of 3 above hypotenuses towards no abrased gear arranged respectively.

4, according to the described no abrased gear pump of claim 1, it is characterized in that: the negative pressure stiffening rib is arranged on the pump case, and the negative pressure stiffening rib is positioned between two no abrased gears of liquid entering hole.

5, according to the described no abrased gear pump of claim 1, it is characterized in that: on the inner side surface of end cap compensating groove is arranged.

6, according to the described no abrased gear pump of claim 1, it is characterized in that: with on the support of thrower corresponding position collecting annulus is arranged.

7, according to the described no abrased gear pump of claim 1, it is characterized in that: thrower is frustoconic shape, and the upper end of round platform is covered towards shelves.

8, according to the described no abrased gear pump of claim 1, it is characterized in that: the shape of cross section of negative pressure stiffening rib is divided into two-part up and down, the bottom is divided into an inverted isosceles triangle, top is divided into isosceles trapezoid, the end of bottom isosceles triangle, overlap with going to the bottom of top isosceles trapezoid, the height of isosceles triangle and the height of isosceles trapezoid equate, the isosceles trapezoid waist be shaped as a no abrased gear top circle segmental arc, waist length be equal to or greater than the long-pending of tangent value that no abrased gear top circle girth multiply by no abrased gear tooth helix angle divided by the merchant and the facewidth of the number of teeth and, the length of upper base is the modulus of no abrased gear.

9, according to the described no abrased gear pump of claim 1, it is characterized in that: between support and the cover surface of contact conduction hole is arranged, conduction hole and guiding groove, the negative pressuren zone between collecting annulus and the two no abrased gears links to each other.