CN201301786Y

CN201301786Y - Electric oil pump

Info

Publication number: CN201301786Y
Application number: CNU2008203030780U
Authority: CN
Inventors: 叶志林; 黄振清
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-03
Filing date: 2008-12-03
Publication date: 2009-09-02
Anticipated expiration: 2018-12-03

Abstract

The utility model discloses an electric oil pump which comprises a pump body. The outputs of a plurality of pump plungers of the pump body merge together, and are output from two output pipelines by a change-over valve, wherein one of the output pipelines is provided with a check valve; an adjustable valve, a safety valve and a relief valve are mounted on the pipeline arranged in front of the check valve along oil output direction; and the other output pipeline is connected with a safety valve. The electric oil pump is used assistantly for bi-directionally acting jacks or hydraulic cylinders to increase oil output, and is characterized by easy operation and reliable running.

Description

Electric oil pump

Technical field

The utility model relates to hydraulic transmission technology field, and is particularly a kind of by motoring, the machinery of hydraulic power is provided for two-way function jack such as stretch-draw, pushing tow, lifting.

Background technique

The stretch-draw jack of electric oil pump and adapted is generally used for the production and the installation of prestressed concrete member, is used for pushing tow, jacking, lifting and a jack of reusing and also adopts this electric oil pump.Use at most at present, the most homemade ZB2 * 2-500 type electric oil pump.This electric oil pump has one by pump housing that six plungers are arranged of motoring, per three plunger cavities of the plunger cavity of six pump oil respectively are provided with oil inlet hole and oil outlet through one in this pump housing, and output merges to a pump housing oil outlet be provided with the oil distributing valve of one-way valve in these oil inlet holes and oil outlet after, such pump housing just has two oil outlets, these two oil outlets connect an output pipe respectively, these two output pipes are supplied with the cylinder body of jack or other hydraulic cylinder piston both sides respectively, these two output pipe structures are identical, in output pipe, be provided with safety check, along the direction of fuel feeding, safety valve and throttle valve are housed on the pipeline before the safety check; On the pipeline after safety check unloading valve is housed.This electric oil pump in use, two output pipe joints are communicated with respectively on the hydraulic cylinder at jack piston two ends, respectively to the piston two ends fuel feeding or the oil return of hydraulic cylinder.There is following shortcoming in this electric oil pump: 1. operate cumbersome: two passes are arranged on each control valve, close handle, left and right control valve is totally 4 handles, and (advance or retreat) 4 handles all will carry out the action of switch when jack moves.If when backhaul, forgotten to open the oil return handle of another control valve, with causing bar oil pocket oil pressure to surpass the several times of rated oil pressure, form high pressure, cause the damage of jack often, even human casualty accident takes place; 2. commutation inconvenience if will make hydraulic jack advance or retreat, will be carried out the operation of 4 handles on the control valve body equally; The maximum rated oil pressure that 3. can provide only reaches 50Mpa, and the client who has needs the above oil pressure of 50Mpa, and this pump just can't satisfy; 4. do not have safty device, can't prevent operational error; 5. flow is little, only 2 * 2L/min flow.During with the jack adapted, the jack piston operation is slow, and the large-tonnage jack more so.

Summary of the invention

Problem to be solved in the utility model provides a kind of easy to operate, and is safe and reliable to operation, the electric oil pump that output flow is big.

In order to address the above problem, electric oil pump of the present utility model includes fuel tank, by electric motor driven multi plungerpump body, the plunger cavity of a plurality of pump oil of the described pump housing all converges to pump housing oil outlet after by oil distributing valve, this oil outlet is exported from two output pipes by a selector valve, one of them bar output pipe is provided with safety check, along the fuel feeding outbound course, on the output pipe before this safety check, be connected to modulating valve and safety valve, be connected to pressure-relief valve on the output pipe after this safety check; Another output pipe is connected to safety valve.

In such scheme: can also be connected to pressure gauge on the output pipe after the described safety check, to observe the oil pressure on the output pipe; Described each oil distributing valve is by having central through bore, and the outside plug that is connected with the pump housing by screw thread is fitted in the termination of a described plunger cavity, at described plug and be used to seal between the seal ring of the described oil distributing valve and the described pump housing elastic washer is housed.For the ease of moving, road wheel can also be equipped with in described fuel tank bottom.For the ease of installing and the raising reliability of operation, pressure-relief valve, modulating valve, safety valve and safety check on described that output pipe that is connected to safety check can be integrated as a whole combination brake switch and proporting, and safety valve on another output pipe and described selector valve can be the combination brake switch and proporting of an integrated integral body.In above-mentioned various schemes, described pressure-relief valve, the oil outlet of modulating valve and two safety valves all is communicated with described fuel tank by pipeline.

Owing to adopted such scheme, the utility model compared with prior art to have beneficial effect under which:

1, increases flow, utilized the power of motor fully.Compare with the ZB2 * 2-500 type electric oil pump of prior art, it is equipped with 3 kilowatt motors, because its a plurality of plunger cavities are to be divided into independently two-way output, in actual use, this two-way is exported on the oil cylinder of the piston both sides that are connected on jack or oil cylinder respectively, this two-way output is fuel feeding simultaneously, with this electric oil pump the flow of half to be arranged when stretch-draw is used be can't be as driving fuel feeding with regard to causing for this, the flow that is used for fuel feeding only is 2 liters/minute, there is not fully to use the function of the motor and the pump housing, and the utility model of same specification is because a plurality of plunger cavities all compile after by oil distributing valve is a pump housing oil outlet, given full play to the function of the motor and the pump housing, can obtain 4 liters/minute flow down with equal pressure.

2, operating security improves.Because the required operation of commutation only for rotating selector valve and opening pressure-relief valve, need be operated 4 valves than prior art to compare, and is not easy to make mistakes, and has reduced the danger that misoperation causes, and has improved safety in utilization.

3, easy and simple to handle, quick, it is flexible to commutate.

Description of drawings

Fig. 1 is the utility model embodiment's a plan view.

Fig. 2 is the utility model embodiment's a left view.

Fig. 3 is the structural representation of the utility model embodiment middle pump body.

Fig. 4 is the structural representation of the utility model embodiment middle pump body lower body.

Fig. 5 is the sectional view at F-F place among Fig. 4.

Fig. 6 is the utility model embodiment's a hydraulic control schematic diagram.

Embodiment

The utility model is described in further detail below in conjunction with embodiment:

Fig. 1, electric oil pump shown in Figure 2 have a fuel tank 2 that is connected with handgrip and heel brace, 2 times road wheel 1 is housed at fuel tank, the end face of fuel tank 2 is equipped with motor 4, be connected with motor 4, the multiplunger pump housing 3 that driven by motor 4 stretches in the fuel tank 2, the output oil pipe of the pump housing 3 is connected with commutation combination brake switch and proporting 5 on the end face that is located at fuel tank 2, and the power switch 8 that pressure gauge 6, release are regulated combination brake switch and proporting 7 also is housed on the end face of fuel tank 2.

The structural representation of the multiplunger pump housing 3 shown in Figure 3, oil distributing valve 3.2 wherein is identical with oil distributing valve structure in existing ZB2 * 2-500 type electric oil pump, it is by the plug 3.6 of lower end, seal ring 3.4 and elastic washer 3.5 are contained in the pump lower body 3.1, the upper end of oil distributing valve 3.2 is crimped on the lower end mouth of plunger cavity, plug 3.6 is provided with the central through bore that is communicated with oil distributing valve 3.2 filler openings, it is by being threaded on the pump lower body 3.1, when the plunger of the pump housing 3 moves upward, the safety check blocking-up that is made of steel ball and spring in oil distributing valve 3.2 is communicated with plunger cavity and oil outlet oil is chewed 3.3 oil discharge passage, and hydraulic oil enters plunger cavity from the central through bore of plug 3.6 from oil distributing valve 3.2; When the plunger of the pump housing 3 moves downward, the safety check blocking-up that is made of steel ball and spring in the oil distributing valve 3.2 is communicated with the oil inlet passage of plunger cavity and plug 3.6 central through bores, hydraulic oil in the plunger cavity flows out from oil distributing valve 3.2 oil discharge passages, is pooled to oil along oil distributing valve 3.2 sides and chews 3.3.

Fig. 4, shown in Figure 5, pump lower body 3.1 have six plunger cavities, and whole six plunger cavities connect mutually, and the C mouth among the figure is an oil outlet, and D, E mouth are the technology mouth, are using sealing.

Shown in Figure 6, the oil outlet tube of this electric oil pump pump housing 3 is connected with the filler opening of selector valve combination brake switch and proporting 5, in selector valve combination brake switch and proporting 5, be provided with selector valve 5.1 and safety valve 5.2, selector valve combination brake switch and proporting 5 is exported from two output pipes, one of them bar output pipe connects the filler opening that combination brake switch and proporting 7 is regulated in a release, this filler opening from the outside fuel feeding of interface A, in combination brake switch and proporting 7 is regulated in release, also is communicated with modulating valve 7.3 and safety valve 7.4 by 7.2 backs of the safety check in this combination brake switch and proporting on filler opening.In combination brake switch and proporting 7 is regulated in release, be provided with the pressure-relief valve 7.1 that is communicated with oil outlet.Pressure-relief valve 7.1, the oil outlet of modulating valve 7.3 and safety valve 7.4 all by pipeline connection in fuel tank.Safety valve 5.2 in the selector valve combination brake switch and proporting 5 is communicated with the outside fuel feeding in this output pipe interface B place with another output pipe.

Be provided with safety check,, on the output pipe before this safety check, be connected to, be connected to pressure-relief valve on the output pipe after this safety check along the fuel feeding outbound course; Another output pipe is connected to safety valve.

Claims

1. electric oil pump, include fuel tank, by electric motor driven multi plungerpump body, it is characterized in that: the plunger cavity of a plurality of pump oil of the described pump housing all converges to pump housing oil outlet after by oil distributing valve, this oil outlet is exported from two output pipes by a selector valve, and one of them bar output pipe is provided with safety check, along the fuel feeding outbound course, on the output pipe before this safety check, be connected to modulating valve and safety valve, be connected to pressure-relief valve on the output pipe after this safety check; Another output pipe is connected to safety valve.

2. electric oil pump according to claim 1 is characterized in that: be connected to pressure gauge on the output pipe after the described safety check; Described each oil distributing valve is by having central through bore, and the outside plug that is connected with the pump housing by screw thread is fitted in the termination of a described plunger cavity, at described plug and be used to seal between the seal ring of the described oil distributing valve and the described pump housing elastic washer is housed.

3. electric oil pump according to claim 1 and 2 is characterized in that: road wheel is equipped with in described fuel tank bottom; Pressure-relief valve, modulating valve, safety valve and safety check on described that output pipe that is connected to safety check are integrated as a whole combination brake switch and proporting; Safety valve on another output pipe and described selector valve are integrated as a whole combination brake switch and proporting.

4. electric oil pump according to claim 1 and 2 is characterized in that: described pressure-relief valve, the oil outlet of modulating valve and two safety valves all is communicated with described fuel tank by pipeline.