CN207881270U - A kind of inflation pressure-equalizing device for acoustic energy refrigeration machine - Google Patents
A kind of inflation pressure-equalizing device for acoustic energy refrigeration machine Download PDFInfo
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- CN207881270U CN207881270U CN201820261940.XU CN201820261940U CN207881270U CN 207881270 U CN207881270 U CN 207881270U CN 201820261940 U CN201820261940 U CN 201820261940U CN 207881270 U CN207881270 U CN 207881270U
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- displacer
- equalizing device
- inflation pressure
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Abstract
The utility model provides a kind of inflation pressure-equalizing device for acoustic energy refrigeration machine, including shell, cylinder, displacer, displacer bar, compression piston, fixing screws, hot end heat exchanger, regenerator and cool end heat exchanger, cylinder offers several symmetrical exhaust passages, displacer and compression piston are arranged in cylinder and can be moved back and forth along the axis direction of cylinder, fixing screws offer through-hole, the first end of displacer bar offers inlet channel, the end of inlet channel is radially offering a radial hole, there is clearance seal body between axis hole and displacer bar, clearance seal body is more than the difference between displacer and the moving displacement of compression piston in axial length；The utility model has inflated condition and operating status, and when in inflated condition, radial hole is connected with back pressure cavity, and when in operating status, radial hole is not connected to back pressure cavity, and compression chamber is not collaborated with displacer inner cavity, and refrigeration performance is good.
Description
Technical field
The utility model is related to a kind of inflation pressure-equalizing devices, are to be related to a kind of inflation for acoustic energy refrigeration machine specifically
Pressure-equalizing device belongs to refrigeration machine technical field.
Background technology
With space technology, infrared technique, atomic energy technology, superconductor technology, low-temperature physics, low-temperature electronics, low temperature doctor
The development of modern science and technology such as learn, free-piston type acoustic energy refrigeration machine is because its small, light-weight, oil-free lubrication, reliable
Many advantages, such as property is high, is paid close attention to by more and more people.
A key parameter of the blowing pressure as acoustic energy refrigeration machine, directly affects the performance of refrigeration machine.In general, acoustic energy
The blowing pressure of refrigeration machine is about in 2.5MPa~3.5MPa.There is larger temperature ladders at the displacer both ends of acoustic energy refrigerant
Degree, cold junction temperature it is minimum can down to -200 DEG C hereinafter, hot-side heat dissipation temperature range be 0~70 DEG C, so displacer mostly use by
Upper and lower two parts reduce axial heat conduction loss by threaded engagement, to make the design of displacer inner hollow.Such structure
The shortcomings that design, is, when being inflated to acoustic energy refrigeration machine, can not judge whether the gas pressure of displacer inner space has reached
To the blowing pressure.If just stopping inflating when displacer internal pressure does not reach the blowing pressure, then refrigeration machine can run
After a period of time, pressure causes the blowing pressure to reduce just with the pressure balance of back pressure cavity in displacer, and refrigeration performance reduces.
Utility model content
The main purpose of the utility model is to provide that a kind of compression chamber is not collaborated with displacer inner cavity and refrigeration performance is good
Inflation pressure-equalizing device for acoustic energy refrigeration machine.
To achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of inflation pressure-equalizing device for acoustic energy refrigeration machine, including shell, cylinder, displacer, displacer bar, compression work
Plug, fixing screws, hot end heat exchanger, regenerator and cool end heat exchanger, cylinder are located at the inside of shell, and cool end heat exchanger returns
Hot device and hot end heat exchanger in turn cover the outer wall of cylinder and respectively in shells, and cylinder is in the diameter at hot end heat exchanger
Several symmetrical exhaust passages are offered to ground, displacer and compression piston are arranged in cylinder and can be along the axis directions of cylinder
It moves back and forth, the first end that displacer is located at hot end heat exchanger is connect by fixing screws with the first end of displacer bar, fixed
Screw offers through-hole, and the first end of displacer bar offers inlet channel, and the end of inlet channel is radially offering a diameter
To aperture, there is displacer displacer inner cavity, inlet channel to be connected with displacer inner cavity by through-hole, and compression piston passes through axis
Hole is sleeved on displacer bar, and there is clearance seal body, clearance seal body to be more than in axial length between axis hole and displacer bar
Difference between displacer and the moving displacement of compression piston forms back pressure cavity between compression piston and shell, shell is in back pressure
Cavity region offers inflating port, and inflation pressure-equalizing device has inflated condition and operating status, when inflation pressure-equalizing device is in inflation
When state, radial hole is connected with back pressure cavity, and when inflation pressure-equalizing device is in operating status, radial hole and back pressure cavity are not
Connection.
Further scheme is that displacer has upper displacer and lower displacer, the open end of upper displacer and lower row
Go out the open end connection of device, the bottom of lower displacer offers stepped hole, and stepped hole is sleeved on the first end of displacer bar.
Further scheme is that the open end of upper displacer is provided with shaft shoulder portion, has outer spiral shell on the outer wall in shaft shoulder portion
There is internal thread, internal thread to coordinate with external screw thread for the open end of line, lower displacer.
Further scheme is a diameter of 0.5 to 1.5 millimeter of radial hole.
Further scheme is a diameter of 0.5 to 2.0 millimeter of through-hole.
Further scheme is 0.85 times of its a diameter of top internal thread nominal diameter of inlet channel.
Further scheme is that top internal thread is M5.
Further scheme is that the maximum difference between displacer and the moving displacement of compression piston is displacer and pressure
0.7 to 0.9 times of the sum of the amplitude of contracting piston, clearance seal body are more than maximum difference in axial length.
Further scheme is that clearance seal body is more than 0.5 to 2.5 millimeter of maximum difference in axial length.
Further scheme is that clearance seal body is more than 1.5 millimeters of maximum difference in axial length.
Compared with prior art, the utility model has the advantages that：
Fixing screws described in the utility model offer through-hole, and the first end of displacer bar offers inlet channel, and
The end of inlet channel is radially offering radial hole, and gas passes sequentially through inflating port, radial hole, inlet channel, through-hole,
Arrive at displacer inner cavity, at this time back pressure cavity and the pressure moment of displacer inner cavity reach balance, ensure that described inflate is pressed
It sets in inflation, each component of refrigerating device inner can be rapidly reached the blowing pressure.And it when inflating pressure-equalizing device operation, utilizes
Clearance seal body between displacer bar and compression piston ensure that compression chamber is not collaborated with displacer inner cavity, improve acoustic energy
The refrigeration performance of refrigeration machine.
Description of the drawings
Fig. 1 is a kind of structure section view for inflation pressure-equalizing device for acoustic energy refrigeration machine that the utility model embodiment provides
Figure；
Fig. 2 is that a kind of inflation pressure-equalizing device for acoustic energy refrigeration machine that the utility model embodiment provides is in inflation shape
The sectional view of state；
Fig. 3 is that a kind of inflation pressure-equalizing device for acoustic energy refrigeration machine that the utility model embodiment provides is in operation shape
The sectional view of state；
Fig. 4 is a kind of unusable shape of inflation pressure-equalizing device for acoustic energy refrigeration machine that the utility model embodiment provides
The sectional view of state.
Specific implementation mode
The technical solution of the utility model is described in further detail below in conjunction with drawings and examples.
Embodiment
In conjunction with shown in Fig. 1 to Fig. 3, a kind of inflation pressure-equalizing device for acoustic energy refrigeration machine provided in this embodiment, including
Shell, cylinder, displacer 1, displacer bar 3, compression piston 4, fixing screws 2, hot end heat exchanger 82, regenerator 83 and cold end
Heat exchanger 84, cylinder are located at the inside of shell.Cool end heat exchanger 84, regenerator 83 and hot end heat exchanger 82 in turn cover respectively
The outer wall of cylinder is simultaneously located in shell, and cylinder is radially being opened up at hot end heat exchanger 82 there are two symmetrical exhaust passage
9.Displacer 1 and compression piston 4 are arranged in cylinder and can be moved back and forth along the axis direction of cylinder, and displacer 1 has upper row
Going out device 13 and lower displacer 12, the open end of upper displacer 13 is provided with shaft shoulder portion, has external screw thread on the outer wall in shaft shoulder portion, under
There is internal thread, internal thread to coordinate with external screw thread for the open end of displacer 12.The bottom of lower displacer 12 offers stepped hole, rank
Terraced hole is sleeved on the first end of displacer bar 3, and fixing screws 2 are threadedly coupled through stepped hole with the first end of displacer bar 3.
Fixing screws 2 offer through-hole 21, it is preferable that a diameter of 0.5 to 2.0 millimeter of through-hole 21.The of displacer bar 3
One end offers inlet channel 31, it is preferable that 0.85 times of its a diameter of top internal thread nominal diameter of inlet channel 31, this
The top internal thread of embodiment inlet channel 31 be M5, a diameter of 4.2 millimeters of inlet channel 31.The end of inlet channel 31 exists
Radial direction offers a radial hole 32, it is preferable that a diameter of 0.5 to 1.5 millimeter of radial hole 32.Upper displacer 13 and lower row
The inside for going out device 12 surrounds a displacer inner cavity 11, and inlet channel 31 is connected by through-hole 21 with displacer inner cavity 11.Compression
Back pressure cavity 6 is formed between piston 4 and shell, shell offers inflating port 81 in 6 region of back pressure cavity, and inflation pressure-equalizing device, which has, to be filled
Gaseity and operating status.When inflation pressure-equalizing device is in inflated condition, radial hole 32 is connected with back pressure cavity 6.When filling
When gas pressure-equalizing device is in operating status, radial hole 32 is not connected to compression chamber 5.
Compression piston 4 on displacer bar 3, has clearance seal body 41 by shaft hole sleeve between axis hole and displacer bar 3,
Clearance seal body 41 is more than the difference a between displacer 1 and the moving displacement of compression piston 4 in axial length L.Displacer 1
Maximum difference a between the moving displacement of compression piston 4maxFor the sum of the amplitude of displacer 1 and compression piston 4 0.7 to
0.9 times, clearance seal body 41 is more than maximum difference a in axial length Lmax, ensure that inflation pressure-equalizing device in the process of running
Compression chamber 5 will not be collaborated with displacer inner cavity 11 by radial hole 32, and compression chamber 5 is by the inside of cylinder, compression piston 4 and row
Go out between device 1 and surrounds.Preferably, clearance seal body 41 is more than maximum difference a in axial length Lmax0.5 to 2.5 millimeter, this
Embodiment clearance seal body 41 is more than maximum difference a in axial length Lmax1.5 millimeter.Clearance seal body 41 is in axial length
Degree L can also be obtained by following computational methods：If the amplitude of displacer 1 is x1, the amplitude of compression piston 4 is x2, displacer 1
The phase angle of leading 4 displacement of compression piston of displacement isDisplacer 1 and the displacement of compression piston 4 are SIN function, operation frequency
Rate is f.The then difference between displacer 1 and the moving displacement of compression piston 4
The phase angle of leading 4 displacement of compression piston of usual 1 displacement of displacerIt is 40 ° to 100 °.
When inflation pressure-equalizing device is in inflated condition, Working medium gas arrives at displacer along curved path shown in Fig. 2
Inner cavity 11.Specifically flow path is：Gas passes sequentially through inflating port 81, radial hole 32, inlet channel 31, through-hole 21, arrives at
Displacer inner cavity 11, at this time the pressure moment of back pressure cavity 6 and displacer inner cavity 11 reach balance, inflationtime is extremely short.It is existing
Technology, which is Working medium gas, slowly to be penetrated into displacer by the threaded engagement gap 14 of lower displacer 12 and upper displacer 13
Chamber 11, seriously extends inflationtime, increases the uncertainty of inflation.
After inflating pressure-equalizing device inflation, when inflation pressure-equalizing device starts normal operation, that is, inflate at pressure-equalizing device
In operating status, displacer 1 and compression piston 4 do linear reciprocating motion in cylinder.Gas passes through after the compression of compression chamber 5
The exhaust passage 9 of cylinder is discharged, and passes through hot end heat exchanger 82, regenerator 83, cool end heat exchanger 84 successively, finally arrives at expansion chamber
7 carry out swell refrigeration, and then returning to compression chamber 5 along former route continues to compress.At this point, radial hole 32 is not connected to back pressure cavity 6.
Referring to Fig. 4, if clearance seal body 41 is too small in axial length L, the Working medium gas in compression chamber 5 can pass through diameter
It collaborates to aperture 32, inlet channel 31, screwing through hole 21 and displacer inner cavity 11.It can not be by cylinder by compressed gas
Exhaust passage 9 enter expansion chamber 7, swell refrigeration process can not be completed, at this time inflate pressure-equalizing device can not work normally.But
It is that clearance seal body 41 can not be too long in axial length L, the inlet channel 31 of displacer bar 3 otherwise can be made in axial direction
Length is long, increases the difficulty of processing and manufacturing.It can be seen that design of the clearance seal body 41 in axial length L is very heavy
It wants.
The fixing screws 2 of the present embodiment inflation pressure-equalizing device offer through-hole 21, the first end of displacer bar 3 offer into
Gas channel 31 and the end of inlet channel 31 offer radial hole 32 in radial direction, and gas passes sequentially through inflating port 81, radial direction
Aperture 32, inlet channel 31, through-hole 21 arrive at displacer inner cavity 11, at this time the pressure moment of back pressure cavity 6 and displacer inner cavity 11
Reach balance, ensure that inflation pressure-equalizing device in inflation, each component of refrigerating device inner can be rapidly reached the blowing pressure.And
When inflating pressure-equalizing device operation, using the clearance seal body 41 between displacer bar 3 and compression piston 4, compression chamber 5 ensure that
It does not collaborate with displacer inner cavity 11, improves the refrigeration performance of acoustic energy refrigeration machine.
Above example, only preferred embodiments of the utility model, be not to limit the utility model practical range, therefore it is all
According to the equivalent change or modification that the structure, feature and principle described in present utility model application the scope of the claims is done, should all be included in
In the utility model patent application range.
Claims (10)
1. a kind of inflation pressure-equalizing device for acoustic energy refrigeration machine, it is characterised in that：
Including shell, cylinder, displacer, displacer bar, compression piston, fixing screws, hot end heat exchanger, regenerator and cold end
Heat exchanger, the cylinder are located at the inside of the shell；
The cool end heat exchanger, the regenerator and the hot end heat exchanger in turn cover the outer wall of the cylinder and position respectively
In in the shell, the cylinder is radially offering several symmetrical exhaust passages at the hot end heat exchanger；
The displacer and the compression piston are arranged in the cylinder and can be moved back and forth along the axis direction of the cylinder,
The first end that the displacer is located at the hot end heat exchanger is connected by the fixing screws and the first end of the displacer bar
It connects；
The fixing screws offer through-hole, and the first end of the displacer bar offers inlet channel, the inlet channel
End offers a radial hole in radial direction, and there is the displacer displacer inner cavity, the inlet channel to pass through the through-hole
It is connected with the displacer inner cavity；
The compression piston on the displacer bar, has gap by shaft hole sleeve between the axis hole and the displacer bar
Seal, the clearance seal body are more than in axial length between the displacer and the moving displacement of the compression piston
Difference；
Back pressure cavity is formed between the compression piston and the shell, the shell offers inflation in the back pressure cavity region
Mouthful, the inflation pressure-equalizing device has inflated condition and operating status；
When the inflation pressure-equalizing device is in inflated condition, the radial hole is connected with the back pressure cavity；
When the inflation pressure-equalizing device is in operating status, the radial hole is not connected to the back pressure cavity.
2. inflation pressure-equalizing device according to claim 1, it is characterised in that：
The displacer has upper displacer and lower displacer, the opening of the open end of the upper displacer and the lower displacer
End connection, the bottom of the lower displacer offer stepped hole, and the stepped hole is sleeved on the first end of the displacer bar.
3. inflation pressure-equalizing device according to claim 2, it is characterised in that：
The open end of the upper displacer is provided with shaft shoulder portion, has external screw thread, the lower discharge on the outer wall in the shaft shoulder portion
There is internal thread, the internal thread to coordinate with the external screw thread for the open end of device.
4. inflation pressure-equalizing device according to claim 1, it is characterised in that：
A diameter of 0.5 to 1.5 millimeter of the radial hole.
5. inflation pressure-equalizing device according to claim 1, it is characterised in that：
A diameter of 0.5 to 2.0 millimeter of the through-hole.
6. inflation pressure-equalizing device according to claim 1, it is characterised in that：
0.85 times of its a diameter of top internal thread nominal diameter of the inlet channel.
7. inflation pressure-equalizing device according to claim 6, it is characterised in that：
The top internal thread is M5.
8. inflation pressure-equalizing device according to any one of claims 1 to 7, it is characterised in that：
Maximum difference between the displacer and the moving displacement of the compression piston is that the displacer and the compression are lived
0.7 to 0.9 times of the sum of the amplitude of plug, the clearance seal body are more than the maximum difference in axial length.
9. inflation pressure-equalizing device according to claim 8, it is characterised in that：
The clearance seal body is more than 0.5 to 2.5 millimeter of the maximum difference in axial length.
10. inflation pressure-equalizing device according to claim 9, it is characterised in that：
The clearance seal body is more than 1.5 millimeters of the maximum difference in axial length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820261940.XU CN207881270U (en) | 2018-02-22 | 2018-02-22 | A kind of inflation pressure-equalizing device for acoustic energy refrigeration machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820261940.XU CN207881270U (en) | 2018-02-22 | 2018-02-22 | A kind of inflation pressure-equalizing device for acoustic energy refrigeration machine |
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| Publication Number | Publication Date |
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| CN207881270U true CN207881270U (en) | 2018-09-18 |
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| CN201820261940.XU Active CN207881270U (en) | 2018-02-22 | 2018-02-22 | A kind of inflation pressure-equalizing device for acoustic energy refrigeration machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168136A (en) * | 2018-02-22 | 2018-06-15 | 方舟 | A kind of inflation pressure-equalizing device for acoustic energy refrigeration machine |
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2018
- 2018-02-22 CN CN201820261940.XU patent/CN207881270U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168136A (en) * | 2018-02-22 | 2018-06-15 | 方舟 | A kind of inflation pressure-equalizing device for acoustic energy refrigeration machine |
| CN108168136B (en) * | 2018-02-22 | 2023-09-22 | 方舟 | Inflating and pressure equalizing device for acoustic energy refrigerator |
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