CN209453249U

CN209453249U - A kind of cooling equipment of electro spindle

Info

Publication number: CN209453249U
Application number: CN201822080135.XU
Authority: CN
Inventors: 刘子良
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2019-10-01
Anticipated expiration: 2028-12-11

Abstract

The utility model discloses a kind of cooling equipment of electro spindle, including compressor, condenser, evaporator and liquid storage container, compressor is connect by high-voltage tube with condenser, condenser is connect by refrigeration pipeline with evaporator, refrigeration pipeline is equipped with throttle valve, evaporator is placed in liquid storage container and is connect by low-voltage tube with compressor, relief tube is connected between high-voltage tube and low-voltage tube, relief tube is equipped with relief valve, relief valve is connected with electric controller, liquid temperature sensor is connect with electric controller out, the utility model can be realized the temperature control to the higher precision of coolant liquid, so as to carry out high-precision temperature control to electro spindle, avoid electro spindle difference variation excessive, substantially reduce the thermal stretching value of electro spindle, be conducive to improve the machining accuracy of lathe, and avoid the frequent start-stop of compressor, enable equipment automatic according to load Refrigerating capacity is adjusted, had both guaranteed the stabilization of coolant temperature, and had also reached energy-efficient purpose.

Description

A kind of cooling equipment of electro spindle

Technical field

The utility model relates to electric main shaft of digital control machine tool cooling technology more particularly to a kind of cooling equipment of electro spindle.

Background technique

Since motor is integrated in main axle unit and revolving speed is very high by the electro spindle of lathe, lengthened with the electro spindle duration of runs Inside can generate amount of heat, and the thermal characteristic of electro spindle and dynamic characteristic is made to be deteriorated, to influence the stabilization of electro spindle work Property, until machining accuracy be effectively ensured can not, it is therefore necessary to take certain measure that the internal heat of electro spindle is taken away, make its guarantor It holds in certain temperature range, to ensure the machining accuracy of workpiece.Currently, lathe generally uses compulsory circulative cooling liquid (usually It is oil or water) cooling mode cools down electro spindle, i.e., by cooling component cooling water or oil (being referred to as coolant liquid), then It forces coolant liquid to flow through inside electro spindle, takes away generated heat when main shaft work, so that electro spindle work be enabled to stablize shape State.But now the cooling equipment of the constant speed that generally uses is since temperature-controlled precision is only near 2 DEG C, can no longer meet and is increasingly promoted The requirement of machining high-precision temperature control；And generally cool down equipment working principle at present: freon is compressed into high temperature and pressure by compressor Gaseous state freon, is then delivered to the liquid freon for becoming medium temperature and medium pressure after condenser radiates, and liquid freon passes through throttle valve Become low pressure steam state freon after absorbing heat into evaporator, compressor again again takes out the low pressure steam state freon in evaporator Out, and again it is compressed, is so recycled again and again.Since in this course of work, throttle valve goes out, enters in refrigeration system Mouthful pressure difference decides the amount for flowing through throttle valve freon, and the pressure difference of throttle valve entry and exit by environment temperature, humidity, made Cold object temperature change influence is very big, so common refrigeration equipment is difficult to accurately control refrigerating capacity, is also difficult to accurately control and be made The temperature of cold object (electro spindle).

The temperature control of constant speed freon refrigeration equipment commonplace at present is all to open, stop compressor form control, Wu Fada To accurate temperature controlling.Its temperature control process: the actual temperature for detecting coolant liquid compares with set temperature, when coolant liquid is equal to set temperature When, compressor stops working, (but the temperature of coolant liquid also will continue to decline, enable coolant temperature under cold effect of inertia at this time Deviate set temperature) when coolant temperature goes back up to set temperature add-back differential temperature degree, (return difference temperature is to enable compression work pacify When entirely), and when shutting down duration away from last time and being greater than compressor and restart protection duration, compressor task (but liquid of cooling down at this time again Temperature is centainly greater than set temperature than big, is usually higher by 2 DEG C or so, and 2 DEG C for the thermal stretching value of electro spindle, and being cannot Receive).Simultaneously because be up 5 times of electric current or so when compressor starts every time, and this control model be to open, Stop compressor and reach temperature control purpose, so energy consumption is high.

Utility model content

In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of cooling equipment of electro spindle, can be with Realize high accuracy temperature control.

To achieve the goals above, the utility model one embodiment the technical solution adopted is that: a kind of electro spindle is cold But equipment, including compressor, condenser, evaporator and liquid storage container, the compressor are connect by high-voltage tube with condenser, institute It states condenser to connect by refrigeration pipeline with evaporator, the refrigeration pipeline is equipped with throttle valve, and the evaporator is placed in storage It is connect in liquid container and by low-voltage tube with compressor, the liquid storage container is provided with the coolant liquid circulation pipe being connected to electro spindle Road, the side that the coolant liquid circulation line flows to electro spindle are provided with out liquid temperature sensor, the high-voltage tube and low-voltage tube Between be connected with relief tube, the relief tube is equipped with relief valve, and the relief valve is connected with electric controller, it is described go out liquid temperature pass Sensor is connect with electric controller.

As a further improvement of the foregoing solution, the relief valve is electric control expansion valve.

Further, the electric control expansion valve standard-sized sheet is set as 200~500 steps.

Further, the throttle valve (22) is throttle expansion valve.

Further, the throttle expansion valve is provided with valve body, temperature sensing package and balance pipe.

One or more embodiments of the utility model at least have the advantages that

The cooling equipment of the electro spindle is equipped on relief tube by being provided with relief tube between high-voltage tube and low-voltage tube Relief valve, relief valve are connected with electric controller, and when coolant temperature is close to set temperature, electric controller controls relief valve and increases aperture The freon for passing through relief tube increases, to reduce the freon for flowing through throttle valve, and then reduces refrigerating capacity, so that cooling The decline of liquid temperature slows down；When coolant temperature is equal to set temperature, relief valve standard-sized sheet, the coolant temperature in liquid storage container is not Decline again；When heat load increases (such as electro spindle acceleration), and coolant liquid temperature rises (rising of T2 value), then electric controller controls relief valve Aperture is reduced, the freon for flowing through relief valve is enabled to reduce, the freon for flowing through throttle valve naturally is increased by, and refrigerating capacity increases, cold But liquid temperature decline is accelerated, and the freon due to flowing through relief valve does not flow through condenser, and the heat included does not discharge, so letting out Cooling equipment is not freezed substantially when pressure valve standard-sized sheet, and when the temperature of coolant liquid is down to set temperature, compressor does not need to stop in this way Turn, at this moment due to the pressure difference very little of high and low pressure pipe, the load of compressor is also very light, and energy consumption substantially reduces, the utility model energy Enough realize controls the temperature of the higher precision of coolant liquid, so as to carry out high-precision temperature control to electro spindle, avoids Electro spindle difference variation is excessive, substantially reduces the thermal stretching value of electro spindle, is conducive to the machining accuracy for improving lathe, and avoid The frequent start-stop of compressor enables equipment automatically adjust refrigerating capacity according to load, had both guaranteed the stabilization of coolant temperature, and also reached section The purpose of energy.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of one embodiment of the utility model.

Specific embodiment

It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field Art personnel other embodiments obtained without creative efforts belong to the model of the utility model protection It encloses.

Referring to Fig.1, one embodiment of the utility model, a kind of cooling equipment of electro spindle, including compression, 1, condenser 2, Evaporator 3 and liquid storage container 4, the compressor 1 are connect by high-voltage tube 11 with condenser 2, and the condenser 2 passes through refrigerator pipes Road 21 is connect with evaporator 3, and the refrigeration pipeline 21 is equipped with throttle valve 22, and throttle valve 22 is preferably throttle expansion valve, throttling Expansion valve is provided with valve body, temperature sensing package and balance pipe, and throttle expansion valve is changed by the degree of superheat of evaporator end come control valve Door flow, prevents evaporator area underutilization and engine knock phenomenon, and the evaporator 3 is placed in liquid storage container 4 and leads to It crosses low-voltage tube 12 to connect with compressor 1, the liquid storage container 4 is provided with the coolant liquid circulation line 41 being connected to electro spindle 5, institute It states 41 road of coolant liquid circulation pipe and flows to the side of electro spindle 5 and be provided with out liquid temperature sensor 42, the high-voltage tube 11 and low pressure Relief tube 13 is connected between pipe 12, the relief tube 13 is equipped with relief valve 14, and relief valve 14 is preferably electric control expansion valve, It is swift in motion, control precision is high, it is preferred that electric control expansion valve standard-sized sheet is set as 200~500 steps, relatively high complete by selecting Step number is opened, so that the control precision of electric control expansion valve is higher, the relief valve 14 is connected with electric controller, the liquid temperature sensing out Device 42 is connect with electric controller, and electric controller can be the electronic controller in air-conditioning system.The temperature control of the cooling equipment of above-mentioned electro spindle Method is as follows: goes out liquid temperature sensor 42 and detects the temperature T2 that coolant liquid circulation line 41 flows to the coolant liquid of electro spindle 5, it is automatically controlled Device is provided with set temperature T0, and electric controller obtains out the T2 value that liquid temperature sensor 42 detects and compares T2 value and T0 value Compared with, if T2-T0 > 0, as T2 value is closer to T0 value, electric controller controls relief valve 14 and increases more apertures reduction refrigerating capacitys, Conversely, electric controller controls relief valve 14 and reduces aperture increase refrigerating capacity then as T2 value is further away from T0 value；If T2-T0≤0, Electric controller control relief valve 14 opens all apertures, so that refrigerating capacity is decreased to minimum.

Freon is compressed into the gaseous state freon of high temperature and pressure and passes through height when the compressor operating of the cooling equipment of tradition Pressure pipe is delivered to condenser heat dissipation, and the gaseous state freon of high temperature and pressure becomes the liquid fluorine benefit of medium temperature and medium pressure after condenser radiates High, liquid freon becomes low pressure after the coolant liquid heat that refrigeration pipeline enters evaporator absorption liquid storage container by throttle valve Steam state freon, compressor is again again extracted the low pressure steam state freon in evaporator out by low-voltage tube, and is compressed again, So recycle again and again.And the utility model is let out by being provided with relief tube 13 between high-voltage tube 11 and low-voltage tube 12 Relief valve 14 is installed in pressure pipe 13, relief valve 14 is connected with electric controller, when coolant temperature T2 is close to set temperature T0, electricity Control device control relief valve 14 increases the freon increase that aperture passes through relief tube 14, to reduce the fluorine for flowing through throttle valve 22 Leon, and then refrigerating capacity is reduced, so that coolant temperature T2 decline slows down；When coolant temperature T2 is equal to set temperature T0, 14 standard-sized sheet of relief valve, the coolant temperature T2 in liquid storage container 4 no longer decline；It is cold when heat load increasing (such as electro spindle 5 accelerates) But when liquid temperature rises (rising of T2 value), then electric controller control relief valve 14 reduces aperture, enables the freon for flowing through relief valve 14 It reduces, the freon for flowing through throttle valve 22 naturally is increased by, and refrigerating capacity increases, and coolant temperature T2 decline is accelerated.Due to flowing through The freon of relief valve 14 does not flow through condenser 2, and the heat included does not discharge, so cooling equipment when 14 standard-sized sheet of relief valve Substantially do not freeze, when the temperature of coolant liquid is down to set temperature, compressor 1 does not need to stall in this way, at this moment due to high and low pressure The pressure difference very little of pipe 11,12, the load of compressor 1 is also very light, and energy consumption substantially reduces, and the utility model can be realized to cooling The temperature of liquid higher precision controls, and so as to carry out high-precision temperature control to electro spindle 5,5 temperature difference of electro spindle is avoided to become Change excessive, substantially reduce the thermal stretching value of electro spindle 5, is conducive to the machining accuracy for improving lathe, and avoid the frequency of compressor 1 Numerous start and stop enable equipment automatically adjust refrigerating capacity according to load, had both guaranteed the stabilization of coolant temperature, and also reached energy-efficient purpose.

The following are one embodiment that applicant carries out: compressor 1 is Panasonic's three-phase 2P11C385AUA (refrigerating capacity 1680W), thermic load is rich China D100D03102 main shaft 4KW, and the balance pipe of throttle valve 22 is equipped with diameter 2mm, long 980mm capillary Pipe, relief valve 14 are automatically controlled 2.0 expansion valve of three court cards (500 step of standard-sized sheet), and electric controller is set as three steps of every 0.2 DEG C of correspondence, are set Target temperature is 25 DEG C；As a result it surveys coolant temperature: 24.8 DEG C ± 0.4 DEG C, reaching design requirement.

It is to be illustrated to the preferred embodiment of the utility model, but the utility model creation is not limited to above The embodiment, those skilled in the art can also make various etc. without departing from the spirit of the present invention Same variation or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.

Claims

1. a kind of cooling equipment of electro spindle, it is characterised in that: hold including compressor (1), condenser (2), evaporator (3) and liquid storage Device (4), the compressor (1) are connect by high-voltage tube (11) with condenser (2), and the condenser (2) passes through refrigeration pipeline (21) it is connect with evaporator (3), the refrigeration pipeline (21) is equipped with throttle valve (22), and the evaporator (3) is placed in liquid storage It is connect in container (4) and by low-voltage tube (12) with compressor (1), the liquid storage container (4) is provided with to be connected to electro spindle (5) Coolant liquid circulation line (41), the side that the coolant liquid circulation line (41) flows to electro spindle (5) is provided with out liquid temperature Sensor (42) is connected with relief tube (13) between the high-voltage tube (11) and low-voltage tube (12), relief tube (13) installation Have relief valve (14), the relief valve (14) is connected with electric controller, and liquid temperature sensor (42) out are connect with electric controller.

2. the cooling equipment of electro spindle according to claim 1, it is characterised in that: the relief valve (14) is automatically controlled expansion Valve.

3. the cooling equipment of electro spindle according to claim 2, it is characterised in that: the electric control expansion valve standard-sized sheet is set as 200~500 steps.

4. the cooling equipment of electro spindle according to any one of claims 1 to 3, it is characterised in that: the throttle valve (22) is section Flow expansion valve.

5. the cooling equipment of electro spindle according to claim 4, it is characterised in that: the throttle expansion valve be provided with valve body, Temperature sensing package and balance pipe.