CN204402871U

CN204402871U - A kind of gear pump

Info

Publication number: CN204402871U
Application number: CN201420726229.9U
Authority: CN
Inventors: 冯启清
Original assignee: ZIBO RELAT VACCUM EQUIPMENT Co Ltd
Current assignee: ZIBO RELAT VACCUM EQUIPMENT Co Ltd
Priority date: 2014-11-26
Filing date: 2014-11-26
Publication date: 2015-06-17
Anticipated expiration: 2024-11-26

Abstract

The utility model relates to a kind of gear pump, comprises the main wheel in the pump housing and inner chamber thereof, follower I, follower II, and described main wheel outward edge arranges four teeth, offers two teeth groove respectively at the outward edge of each follower; Described main wheel two teeth wherein engage with a teeth groove of follower I, a teeth groove of follower II respectively.The utility model beneficial effect is: meshing frequency is low, process is short, inhales, oil-discharging cavity volume is large; This pump can directly reverse use, good from absorption, compression ratio is large; The gear teeth, teeth groove mode can be changed; Trailing wheel is that even number is symmetrical, offsets main wheel radial force, protection main wheel bearing; Main wheel disk diameter its tooth depth that diminishes strains greatly mutually, and follower diameter respective change, after guaranteeing two-wheeled contact seal, can increase the amount of taking out, and uses as low pressure and mass flow pump; Main wheel disk diameter becomes that large tooth depth correspondingly diminishes, follower diameter respective change, can be used as high-pressure low-flow pump and use after guaranteeing two-wheeled contact seal.

Description

A kind of gear pump

Technical field

The utility model relates to hydraulic mechanical equipment field, particularly relates to a kind of gear pump.

Background technique

The most citation form of gear pump is exactly that two measure-alike gears engage each other rotation in a close-fitting housing, and the inner classes of this housing is like the figure of eight, and two gears are contained in the inside, and the external diameter of gear and both sides and housing closely cooperate; Liquid enters in the middle of two gears at suction port, and is full of this space, along with the rotation of tooth is along housing motion, finally discharges at Pai Kouchu.Meanwhile, gear pump relies on the swept volume formed between pumping cylinder and engaging gear to change and the mobile rotary pump carried liquid or make it supercharging.Form two enclosed spaces by two gears, the pump housing and front and rear covers, when pinion rotation, the spatial volume of the side that is out of gear is large from little change, forms vacuum, is sucked by liquid, and liquid from diminishing greatly, and is clamp-oned in pipeline and gone by the spatial volume of gears meshing side.

As from the foregoing, existing gear pump has constantly engaged oil suction, oil extraction process and provide hydraulic pressure by gear, this case it is important to note that, the teeth groove cavity of full-depth tooth gear little and cause suction and head pressure little, full-depth tooth gear is in engagement always and produces pulsation, high-speed gear rotates and produces centrifugal force and affect teeth groove oil suction and pressurized effect, and particularly when elevated pressures, the radial force that gear is subject to shortens more greatly and greatly the gear-bearing life-span; Meanwhile, although existing plunger pump performance is better than gear pump, complex structure, wear-out part are many, cost is high.

Therefore, for above aspect, need reasonably to improve prior art.

Model utility content

For above defect, the utility model provides that a kind of meshing frequency is low, process is short, suction oil pocket volume is large, use of can directly reversing, the gear pump that good from absorption, compression ratio is large, to solve many deficiencies of prior art.

For achieving the above object, the utility model is by the following technical solutions:

A kind of gear pump, comprise the main wheel in the pump housing and inner chamber thereof, follower I, follower II, described follower I, follower II are arranged at main wheel arranged on left and right sides respectively;

Described main wheel outward edge arranges four teeth and is respectively tooth I, tooth II, tooth III, tooth IV, meanwhile, offers two teeth groove respectively at the outward edge of each follower;

Described main wheel two teeth wherein engage with a teeth groove of follower I, a teeth groove of follower II respectively.

Correspondingly, also following characteristics is comprised:

Described main wheel, follower I and follower II are non-fully gear, and follower is set to even number, and main wheel outward edge is with even number tooth, and two teeth groove of each follower are arranged symmetrically with on the same line;

Described follower I or follower II lifting surface area is little and its radial force is little, the main wheel radial forces that compression process produces can be cancelled out each other;

Described main wheel, follower I or follower II can change class 8 word special-shaped wheel into, can change the gear teeth, teeth groove mode, the changeable main wheel number of teeth, follower quantity and teeth groove quantity, and the theory of engagement is identical;

Described main wheel disk diameter its tooth depth that diminishes strains greatly mutually, and follower diameter respective change, after guaranteeing two-wheeled contact seal, can increase the amount of taking out, and uses as low pressure and mass flow pump; Main wheel disk diameter becomes that large tooth depth correspondingly diminishes, follower diameter respective change, can be used as high-pressure low-flow pump and use after guaranteeing two-wheeled contact seal.

By adjustment main wheel, follower I, follower II with pump housing gap can be used as vacuum pump, compressor uses.

The beneficial effect of gear pump described in the utility model is:

(1) meshing frequency is low, process is short, inhales, oil-discharging cavity volume is large; Engagement process is very little on hydraulic fluid flow rate impact, thus pulses also very little;

(2) this pump can directly reverse use, good from absorption, compression ratio is large;

(3) main wheel, trailing wheel can change the special-shaped wheels such as class 8 word into, and can change the gear teeth, teeth groove mode, the changeable main wheel number of teeth, follower quantity and teeth groove quantity, the theory of engagement is identical;

(4) trailing wheel is that even number is symmetrical, offsets main wheel radial force, protection main wheel bearing;

(5) main wheel disk diameter its tooth depth that diminishes strains greatly mutually, and follower diameter respective change, after guaranteeing two-wheeled contact seal, can increase the amount of taking out, and uses as low pressure and mass flow pump; Main wheel disk diameter becomes that large tooth depth correspondingly diminishes, follower diameter respective change, can be used as high-pressure low-flow pump and use after guaranteeing two-wheeled contact seal;

(6) the pocketed oil problem of engagement process is solved by engagement place drain charge groove, and it is identical with existing gear pump solution that gear face reveals backlash compensation problem;

(7) pump housing gap adjusts principal and subordinate's wheel with can be used as vacuum pump, compressor uses.

Accompanying drawing explanation

With reference to the accompanying drawings the utility model is described in further detail below.

Fig. 1 is the structural representation of gear pump described in the utility model embodiment;

Fig. 2 is the schematic diagram of rotation status of gear pump described in the utility model embodiment;

Fig. 3 is the engagement schematic diagram of gear pump described in the utility model embodiment.

In figure:

1, main wheel; 2, follower I; 3, follower II; 4, tooth I; 5, tooth II; 6, tooth III; 7, tooth IV; 12, the pump housing.

Embodiment

As Figure 1-3, gear pump described in the utility model embodiment, comprise the main wheel 1 in the pump housing 12 and inner chamber thereof, follower I 2, follower II 3, described main wheel 1, follower I 2 and follower II 3 are non-fully gear, follower wherein can be set to even number, this follower I 2, follower II 3 are arranged at main wheel 1 arranged on left and right sides respectively and seal for symmetric points contact with each other with main wheel 1 center, form compression chamber and compression chamber is symmetrical in the pump housing 12 inside;

Correspondingly, described main wheel 1 outward edge is with even number tooth, four can be set to and be respectively tooth I 4, tooth II 5, tooth III 6, tooth IV 7, simultaneously, the outward edge of each follower offer two teeth groove respectively and these two teeth groove on the same line, follower I 2 wherein or follower II 3 surface area is less than main wheel 1 surface area and its radial force is also little compared with conventional gear pumps, main wheel 1 radial forces that compression process produces can be cancelled out each other, thus greatly extends its bearing life;

Correspondingly, in rotary course, described main wheel 1 one teeth engage with a teeth groove of follower I 2, main wheel 1 one teeth engage with a teeth groove of follower II 3, as, when tooth II 5 engages with a teeth groove of follower II 3, then tooth IV 7 engages with a teeth groove of follower I 2, when tooth I 4 engages with a teeth groove of follower II 3, then tooth III 6 engages with a teeth groove of follower I 2, thus aspirated by gear, promote, compression instead of gear have frequently engaged suction, be drained through journey, can forward and rotating backward, moment of torsion is large, pressure is high, pulse little, good directionality, structure is simple, cost is low, in addition, described main wheel 1 and follower I 2, follower II 3 pass through the gears meshing synchronous axial system outside Seal cage, in the pump housing.

In addition, under one-way valve coordinates, if can use as vacuum pump, compressor after changing associated gap, Pai Kou position and discharge mode.

The above-mentioned description to embodiment can understand and apply this case technology for the ease of those skilled in the art, person skilled in the art obviously can make various amendment to these examples easily, and General Principle described herein is applied in other embodiment and need not through performing creative labour.Therefore, this case is not limited to above embodiment, and those skilled in the art is according to the announcement of this case, and the improvement made for this case and amendment all should in the protection domains of this case.

Claims

1. a gear pump, comprises the main wheel (1) in the pump housing (12) and inner chamber thereof, follower I (2), follower II (3), it is characterized in that:

Described follower I (2), follower II (3) are arranged at main wheel (1) arranged on left and right sides respectively;

Described main wheel (1) outward edge arranges four teeth and is respectively tooth I (4), tooth II (5), tooth III (6), tooth IV (7), meanwhile, offers two teeth groove respectively at the outward edge of each follower;

Described main wheel (1) two teeth wherein engage with a teeth groove of follower I (2), a teeth groove of follower II (3) respectively.

2. gear pump according to claim 1, is characterized in that: described main wheel (1), follower I (2) and follower II (3) are non-fully gear.

3. gear pump according to claim 1, is characterized in that: described follower is set to even number.

4. gear pump according to claim 1, is characterized in that: described main wheel (1) outward edge is with even number tooth.

5. gear pump according to claim 1, is characterized in that: two teeth groove of each follower are arranged symmetrically with on the same line.

6. gear pump according to claim 1, it is characterized in that: described follower I (2) or follower II (3) lifting surface area is little and its radial force is little, main wheel (1) radial forces that compression process produces can be cancelled out each other.

7. gear pump according to claim 1, it is characterized in that: described main wheel (1), follower I (2) or follower II (3) can change class 8 word special-shaped wheel into, the gear teeth, teeth groove mode can be changed, the changeable main wheel number of teeth, follower quantity and teeth groove quantity, the theory of engagement is identical.

8. gear pump according to claim 1, it is characterized in that: after described main wheel (1) disk diameter diminishes that its tooth depth strains greatly mutually, follower diameter respective change ensures two-wheeled contact seal, the amount of taking out can be increased, use as low pressure and mass flow pump, disk diameter becomes that large tooth depth correspondingly diminishes, follower diameter respective change can be used as high-pressure low-flow pump and uses after ensureing two-wheeled contact seal.

9. gear pump according to claim 1, is characterized in that: by adjustment main wheel (1), follower I (2), follower II (3) with the pump housing (12) gap can be used as vacuum pump, compressor uses.