CN201621037U - Direct Drive Compressor with Permanent Magnetic Buffer Energy Storage - Google Patents

Abstract

The utility model discloses a direct drive compressor with a permanent magnet buffer energy storage device, which comprises a compression chamber shell, a suction and exhaust chamber, a linear drive device for providing power, a sliding bearing fixed inside the compression chamber shell, A piston shaft positioned by a sliding bearing and one end connected to the linear drive device, and a permanent magnet buffer energy storage device. The utility model uses the permanent magnet buffer energy storage device to play the role of buffer energy storage, so that the conversion efficiency between the kinetic energy and potential energy of the piston is improved, and the vibration noise is small, the difficulty of processing and assembly is reduced to the greatest extent, and the permanent magnet buffer The energy storage device is placed inside the compression cavity, which effectively utilizes the space inside the cavity and makes the volume of the compressor more compact.

Description

Direct-drive compressor with permanent magnet stored energy buffering device

Technical field

The utility model relates to a kind of refrigerator refrigerating device, particularly a kind of refrigerator refrigeration direct-drive compressor that adopts permanent magnet as storage piston motion kinetic energy.

Background technique

Linear compressor does not exist motor rotatablely moved and changes the reciprocating crank connecting shaft of piston linear into, but by the to-and-fro motion of the direct driven plunger high speed of linear vibration motor, its stroke and top dead center are by program control, thereby reduction power transmission loss, improve system effectiveness and reliability, and can make compressor arrangement compact more.The directly driving type compressor need carry out reciprocal high frequency oscillation motion between last lower dead center, thereby finishes the compression process for refrigeration agent.Therefore, for direct-drive compressor, the inevitable reversal point of last lower dead center as the piston oscillatory movement, compressor piston kinetic energy should obtain buffering at these 2, so that piston is reverse under the as far as possible little situation of energy loss.

In the direct-drive compressor structure of known applications, generally adopt one group or organize more the circular cylindrical shape spring for piston kinetic energy cushion and play the storage kinetic energy effect.According to Der Grundsatz der Maschinen as can be known, when compressor spring resonance system resonance was moved, energy conversion efficiency was the highest.At this moment, spring plays the effect of interim storage piston motion kinetic energy, and piston kinetic energy and elastic potential energy of the spring be conversion mutually in the mover movement process, makes piston finish the high speed to-and-fro motion so that refrigeration agent is compressed.

But adopt mechanical spring to have following shortcoming as permanent magnet stored energy buffering device:

1 adopts mechanical spring, and vibrating noise is bigger, is one of compressor noise main source.

2 direct-drive compressor efficient are directly related with resonant frequency point, must reduce the mover quality as far as possible and increase spring rate and obtain higher resonant frequency, therefore strengthened the difficulty of processing and assembling.

3 when each spring spring force is inhomogeneous, easily makes piston produce lateral force, and friction strengthens, and the compressor overall efficiency descends.

Be called in the patent application of " moving-magnetic linear compressor " in publication number CN1773112A, name, the linear flexure spring of a kind of round involute vortex is proposed, it can provide higher spring rate, adds the influence of having lacked eccentric force simultaneously, makes piston remain in the central position.But it says that fundamentally it belongs to a kind of improved mechanical spring form, inevitably still has above-mentioned shortcoming.

Be called in the patent application of " Linearkompressor " in publication number CN101395372A, name with gas spring, propose to utilize pressurized gas as gas spring effect play the purpose of temporary transient storage piston kinetic energy.But according to thermomechanics knowledge, gas expands in cylinder and shows as certain non-linear positice ground effect when compressing, and itself and spring force and displacement are linear to be visibly different.Therefore, the efficient of its conversion piston kinetic energy must be lower than mechanical spring.

Summary of the invention

The utility model provides a kind of direct-drive compressor that is used for chiller plant, and employed piston can commutate by easy and energy-conservation mode, thereby realizes to-and-fro motion at a high speed.

The utility model is by being provided with permanent magnetic ring respectively on sliding bearing both sides and compressor piston axle, play the effect of buffering accumulated energy, thereby replacement mechanical spring, make piston finish commutation with minimal losses as far as possible, realization is for the compression of refrigeration agent, provide a kind of efficient height, noise little, at utmost reduce the technological scheme of processing and assembling difficulty.

Permanent magnet stored energy buffering device is used for potential energy mode buffer-stored compressor piston at the kinetic energy that to-and-fro motion was had, and makes piston motion kinetic energy rejection minimum.Permanent magnet stored energy buffering device absorbed kinetic energy and is converted into the potential energy storage before reversal point, again potential energy is returned to piston after the reversal point, thereby make compressor piston move required kinetic energy, and the work done of driver element electromagnetic force institute all is used for compressed refrigerant all by the permanent magnet stored energy buffering device storage.

A kind of direct-drive compressor with permanent magnet stored energy buffering device, comprise the compression chamber housing, the suction and discharge cavity, the linear drive of power is provided, be fixed on the sliding bearing of compression chamber enclosure interior, one end is connected with described linear drive and by the piston shaft of sliding bearing location, permanent magnet stored energy buffering device, described permanent magnet stored energy buffering device is by fixedly magnet ring and motion magnet ring constitute, described fixedly magnet ring comprises the first fixing fixing first fixing second fixing second fixing fixing magnet ring of magnet ring base of magnet ring and sliding bearing opposite side on the magnet ring base of sliding bearing one side, and described motion magnet ring comprises the second motion magnet ring of fixing by on the first motion magnet ring of fixing on piston shaft first protruding ring and second protruding ring.

The described first motion magnet ring and first is magnet ring same polarity positioned opposite fixedly, two magnet rings are the repulsion state, the second motion magnet ring and second is magnet ring same polarity positioned opposite fixedly, two magnet rings are the repulsion state, the first motion magnet ring and first fixedly magnet ring is arranged in a side of sliding bearing, the second motion magnet ring and second fixedly magnet ring is arranged in the opposite side of sliding bearing, and piston shaft is issued to stress balance in the interaction of two pairs of magnet rings of sliding bearing both sides.

Described first fixedly magnet ring and second fixedly magnet ring be the annular permanent-magnet body, the described first motion magnet ring and the second motion magnet ring are that two halves annular permanent-magnet body is spliced, so that make and install.

Described sliding bearing, fixedly magnet ring base and piston shaft are the non-magnet material manufacturing, help the effect of the buffering accumulated energy of permanent magnet stored energy buffering device, and help piston and move reciprocatingly in compression chamber.

Described suction and discharge cavity is made up of induction chamber and exhaust chamber, isolates mutually in the middle of induction chamber and the exhaust chamber, and gaseous fluid enters induction chamber through intakeport, and enters compression air chamber by Aspirating valves, the unidirectional conducting of Aspirating valves; Gaseous fluid enters exhaust chamber through outlet valve from compression air chamber, discharges the unidirectional conducting of outlet valve again through relief opening.

During work, linear drive is connected with piston shaft, and driven plunger is done high speed to-and-fro motion compressed refrigerant, and piston moves between top dead center and lower dead center vertically.Movement process is analyzed: Aspirating valves is an open mode before piston arrives lower dead center by top dead center, outlet valve is a closed condition, gaseous fluid enters compression air chamber by intakeport via induction chamber, and when piston closed on lower dead center, permanent magnet stored energy buffering device absorption kinetic energy was converted into potential energy and stores temporarily; When the piston arrives lower dead center, breathing process is finished, and the kinetic energy of piston is converted into potential energy fully; When piston is begun when top dead center moves by lower dead center, exhaust process begins, and permanent magnet stored energy buffering device discharges potential energy and is converted into kinetic energy and promotes piston motion, and Aspirating valves is a closed condition, and outlet valve is an open mode, and gaseous fluid is discharged by relief opening through exhaust chamber.

Beneficial effect: the utility model replaces mechanical spring to play the effect of buffering accumulated energy with permanent magnet stored energy buffering device, the transformation efficiency between the kinetic energy potential energy of piston is improved, and vibrating noise is little, has at utmost reduced processing and assembling difficulty.In addition, permanent magnet stored energy buffering device is positioned over compression chamber inside, has effectively utilized the inside cavity space, make the compressor volume compact more.

Description of drawings

Fig. 1 is a direct-drive compressor structural representation of the present utility model.

Fig. 2 is the first fixing magnetic pole arrangement schematic representation of magnet ring and the first motion magnet ring.

Embodiment

As shown in Figure 1, an embodiment for direct-drive compressor described in the utility model, comprise fixedly fixedly magnet ring base 6, sliding bearing 7, linear electric motor 8, top dead center 9, lower dead center 10, compression air chamber 11, Aspirating valves 12, outlet valve 13, induction chamber 14, exhaust chamber 15, intakeport 16, relief opening 17 of magnet ring 5, first of compression chamber housing 1, piston 2, piston shaft 3, the first motion magnet ring 4, first, the second motion magnet ring 18, second is the fixing magnet ring base 20 of magnet ring 19, second fixedly, first protruding ring, 21, the second protruding rings 22.

Wherein piston shaft 3 one ends are connected with linear electric motor 8, and the other end is connected with piston 2.

Sliding bearing 7 is fixed in compression chamber housing 1 inside, and piston shaft 3 is moved reciprocatingly by sliding bearing 7 location.

Permanent magnet stored energy buffering device is by fixedly magnet ring and motion magnet ring constitute, wherein fixedly fix on the magnet ring base 6 in first of sliding bearing 7 both sides first fixedly magnet ring 5, second fixedly magnet ring base 20 fix the second fixing magnet ring 19, fix on piston shaft 3 first protruding rings 21 on the first motion magnet ring, 4, the second protruding rings 22 and fix the second motion magnet ring 19.

Described suction and discharge cavity is made up of induction chamber 14 and exhaust chamber 15, isolates mutually in the middle of induction chamber 14 and the exhaust chamber 15, and gaseous fluid enters induction chamber through intakeport 16, and enters compression air chamber 11 by Aspirating valves 12, Aspirating valves 12 unidirectional conductings; Gaseous fluid enters exhaust chamber 15 through outlet valve 13 from compression air chamber 11, discharges outlet valve 13 unidirectional conductings through relief opening 17 again.

During work, linear electric motor 8 directly are connected with piston shaft 3, and driven plunger 2 is done high speed to-and-fro motion compressed refrigerant, piston motion between top dead center 9 and lower dead center 10 vertically.

Movement process is analyzed: Aspirating valves 12 is an open mode before piston 2 arrives lower dead center 10 by top dead center 9, outlet valve 13 is a closed condition, gaseous fluid enters compression air chamber by intakeport 16 via induction chamber 14, when piston 2 closed on lower dead center 10, permanent magnet stored energy buffering device absorption kinetic energy was converted into potential energy and stores temporarily; When piston 2 arrived lower dead center 10, breathing process was finished, and the kinetic energy of piston 2 is converted into potential energy fully; When piston 2 begins to top dead center 9 motions by lower dead center 10, exhaust process begins, and permanent magnet stored energy buffering device discharges potential energy and is converted into 2 motions of kinetic energy promotion piston, and Aspirating valves 12 is a closed condition, outlet valve 13 is an open mode, and gaseous fluid is discharged by relief opening 17 through exhaust chamber 15.

Figure 2 shows that the first fixing magnetic pole arrangement schematic representation of magnet ring 5 and the first motion magnet ring 4: the first fixedly magnet ring 5 and opposite arrangement of the first motion magnet ring, 4 pole orientation, promptly the N utmost point is extremely relative with N, is the repulsion effect between two magnet rings.In addition, the second motion magnet ring 18 and second fixedly magnet ring 19 also is arranged in the opposite side of sliding bearing in an identical manner, and piston shaft 3 is issued to stress balance in two pairs of magnet ring effects of sliding bearing 7 both sides.

The first motion magnet ring 4 is spliced for two halves annular permanent-magnet body, and is fixed on first protruding ring 21 of piston shaft.First fixedly magnet ring 5 be circular permanent magnet, be fixed in and first fixedly on the magnet ring base 6 of the first motion magnet ring, 4 homonymies.

Claims (3)

1. A direct-drive compressor with a permanent magnet buffer energy storage device, comprising a compression chamber housing (1), a suction and exhaust chamber, a linear drive device (8) providing power, and a compressor fixed inside the compression chamber housing The sliding bearing (7), the piston shaft (3) positioned by the sliding bearing (7) and one end connected to the linear drive device (8), and the permanent magnet buffer energy storage device are characterized in that: the permanent magnet buffer The energy storage device is composed of a fixed magnetic ring and a moving magnetic ring. The fixed magnetic ring includes a first fixed magnetic ring (5) fixed on the first fixed magnetic ring base (6) on one side of the sliding bearing (7) and a sliding The second fixed magnetic ring (19) fixed by the second fixed magnetic ring base (20) on the other side of the bearing (7), the moving magnetic ring includes the first protruding ring (21) on the piston shaft (3) The fixed second moving magnetic ring (18) on the fixed first moving magnetic ring (4) and the second raised ring (22); the first moving magnetic ring (4) and the first fixed magnetic ring ( 5) The same polarities are oppositely arranged, and the two magnetic rings are in a repulsive state. The second moving magnetic ring (18) and the second fixed magnetic ring (19) are arranged oppositely with the same polarity, and the two magnetic rings are in a repulsive state. 2. The direct drive compressor according to claim 1, characterized in that: the first fixed magnetic ring (5) and the second fixed magnetic ring (19) are annular permanent magnets, and the first moving The magnetic ring (4) and the second moving magnetic ring (18) are formed by splicing two halves of annular permanent magnets. 3. The direct drive compressor according to claim 2, characterized in that: the sliding bearing (7), the first fixed magnetic ring base (6), the second fixed magnetic ring base (20) and the piston shaft ( 3) All are made of non-magnetic materials.

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