CN210603639U - Temperature sensing device for exhaust of centrifugal compressor - Google Patents
Temperature sensing device for exhaust of centrifugal compressor Download PDFInfo
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- CN210603639U CN210603639U CN201920879322.6U CN201920879322U CN210603639U CN 210603639 U CN210603639 U CN 210603639U CN 201920879322 U CN201920879322 U CN 201920879322U CN 210603639 U CN210603639 U CN 210603639U
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- temperature sensing
- centrifugal compressor
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- thermistor
- sealing ring
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Abstract
The utility model discloses a centrifugal compressor is temperature sensing device for exhaust, include: a housing; a thermistor, said thermistor disposed within said housing; one side of the pin of the thermistor is sleeved with the heat-shrinkable sleeve; the other side of the thermistor is connected with the wire, and the joint of the wire is wrapped with epoxy resin; and the other end of the electric wire is connected with the plastic component, and the heat-shrinkable sleeve, the electric wire and the plastic component are all arranged in the shell and are filled with another epoxy resin. The centrifugal compressor has the advantages of excellent compression resistance, convenience in installation, good sealing after installation, no liquid leakage and pressure release, and accurate temperature measurement on a pipeline at the exhaust end of the centrifugal compressor, so that the centrifugal compressor can work stably and efficiently.
Description
Technical Field
The utility model relates to a sensor field, in particular to temperature sensing device is used in centrifugal compressor exhaust.
Background
The compressor during operation produces high temperature air at the exhaust end, can appear the phenomenon of high temperature when using for a long time or equipment trouble, and high temperature can reduce compressor refrigeration efficiency on the one hand, and on the other hand high temperature makes lubricating oil viscosity descend, mechanical wear increase and damage the compressor even, consequently carries out temperature monitoring to the compressor exhaust end very crucial.
The centrifugal compressor has the obvious advantages of high reliability, convenient operation and maintenance, good power balance, high efficiency, energy conservation and the like, and is widely applied to building air conditioners in subway stations, hospitals and large commercial centers. Accurate temperature control is critical for higher energy efficiency of centrifugal compressor output. The measurement of ordinary compressor exhaust end temperature mainly is the copper pipe temperature that the test discharge valve end extends, take place the heat exchange because of extending copper pipe and outside air, there is the deviation in the temperature of the copper pipe of event survey and the inside gas vent temperature of compressor, it should test the temperature in the exhaust pipe to want accurate test exhaust end temperature, however direct measurement exhaust end pipeline temperature has great degree of difficulty, current exhaust temperature sensor can't assemble on the one hand, secondly because the compressor exhaust end pressure is higher about (1.6 ~ 2 Mpa), current exhaust temperature sensor can't bear this pressure, then the interface is sealed not enough after the assembly causes the coolant liquid weeping, the pressure release, thereby make the compressor can't work.
Therefore, there is a need for a sensor for accurately detecting the exhaust temperature of a centrifugal compressor, which has high temperature measurement accuracy, excellent pressure resistance, and convenient assembly, and maintains good sealing performance with the compressor after assembly.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a temperature sensing device is used in centrifugal compressor exhaust possesses good compressive property, simple to operate, and the installation back forms good sealed, and not weeping, pressure release carry out accurate temperature measurement to centrifugal compressor exhaust end pipeline to make centrifugal compressor work stably, high-efficiently.
In order to solve the technical problem, the utility model discloses a technical scheme does:
a centrifugal compressor discharge temperature sensing device comprising:
a housing; a thermistor, said thermistor disposed within said housing;
one side of the pin of the thermistor is sleeved with the heat-shrinkable sleeve;
the other side of the thermistor is connected with the wire, and the joint of the wire is wrapped with epoxy resin; and the other end of the electric wire is connected with the plastic component, and the heat-shrinkable sleeve, the electric wire and the plastic component are all arranged in the shell and are filled with another epoxy resin.
Preferably, the plastic assembly comprises three signal terminals, a ground terminal, a plastic base and a copper screw cap, wherein the signal terminals are connected with the wires, the signal terminals and the ground terminal are symmetrically and vertically erected on the plastic base, and the copper screw cap is embedded in an opening at the upper end of the plastic base.
Preferably, the housing includes a temperature sensing portion, a sealing ring groove, a circular truncated cone, a hexagon nut, and two external threads, wherein one of the external threads is connected to the temperature sensing portion, the sealing ring groove is connected to the upper portion of the external thread, the circular truncated cone is connected to the upper portion of the sealing ring groove, the hexagon nut is connected to the upper portion of the circular truncated cone, and the other external thread is connected to the upper portion of the hexagon nut.
Preferably, the temperature sensing part has an outer diameter of 9.50mm, a length of 13.50mm and a wall thickness of 1.15 mm.
Preferably, the length range of the sealing ring groove is 2.40mm +/-0.10 mm.
Preferably, the diameter range of the circular truncated cone is 25.40mm +/-0.05 mm, and the length range of the circular truncated cone is 3.20mm +/-0.10 mm.
Preferably, the diameter range of the hexagonal nut is 7.20mm plus or minus 0.05mm, and the length range of the hexagonal nut is 41.00mm plus or minus 0.10 mm.
Preferably, the length ranges of the two external threads are 14.00mm +/-0.10 mm and phi 19.00mm +/-0.05 mm respectively.
Preferably, the thermistor and the electric wire are welded by resistance welding, and the heat-shrinkable sleeve is a polyvinylidene fluoride sleeve.
Preferably, the lower end of the plastic base is sleeved with a sealing ring, and the sealing ring is made of nitrile rubber.
Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that:
first, the temperature sensor thermistor that provides and the wire that is used for signal transmission all place sealed machined part and plastic component in, the sensor possesses super high stability and reliability.
Secondly, the sensor has higher compression resistance, and the threads carried by the sensor shell are tightly matched with the compressor, so that liquid leakage and pressure relief are avoided at the assembly joint under high pressure inside the compressor.
And thirdly, the sensor uses a super-high-precision thermistor and directly measures the temperature of the exhaust pipeline of the compressor, so that the temperature measurement precision of the exhaust end of the compressor is greatly improved, the efficiency of the compressor can be adjusted by combining a temperature control system, and the efficiency output of the compressor is improved while the compressor is protected.
Drawings
FIG. 1 is an exploded view of a temperature sensor;
FIG. 2 is an overall view of the machined housing;
fig. 3 is a cross-sectional view of a plastic component.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 to 3, the present invention provides a temperature sensing device for exhaust of a centrifugal compressor, comprising a housing 1, a thermistor 2, a heat-shrinkable sleeve 3 and an electric wire 4 connected to the thermistor 2, wherein one side of the thermistor 2 is pin-sleeved on the heat-shrinkable sleeve 3, and the joint of the thermistor 2 and the electric wire 4 is wrapped with an epoxy resin 5.
The temperature sensing assembly further comprises a plastic assembly 7, wherein the other end of the wire 4 is connected with two signal terminals 7-1 in the plastic assembly 7, another epoxy resin 6 is filled in the shell 1, and the thermistor 2 and the wire 4 which are wrapped by the epoxy resin 5 are arranged in the shell 1.
The plastic component 7 includes two signal terminals 7-1, a ground terminal 7-2, a plastic base 7-3 and a copper screw cap 7-4. An O-shaped sealing ring 8 is arranged at the joint of the plastic base 7-3 and the shell, and the plastic base 7-3 and the shell 1 are fixed through a plastic nut 9.
Furthermore, the shell 1 is processed from C3604 hexagonal brass, and has the advantages of high mechanical strength, good heat conduction and corrosion resistance, and is beneficial to sensing the temperature of the sensor and capable of bearing high pressure.
The specific structure of the shell 1 is shown in fig. 2, and comprises a temperature sensing part 1-1, an external thread 1-2, a sealing ring groove 1-3, a circular truncated cone 1-4, a hexagonal nut 1-5 and another external thread 1-6. Specifically, the temperature sensing part 1-1 is cylindrical, the outer diameter is phi 9.50mm, the length is 13.50mm, the wall thickness is 1.15mm, an external thread 1-2 with the specification of 3/4-16UNF-2A is connected above the temperature sensing part, the length of the thread 1-2 is 14.00mm +/-0.10 mm, and the thread 1-2 is assembled with a mounting hole of a centrifugal compressor exhaust pipeline. A sealing ring groove 1-3 is connected above the thread part 1-2, the length is 2.40mm +/-0.10 mm, a round table 1-4 is connected above the sealing ring groove 1-3, the diameter of the round table 1-4 is 25.40mm +/-0.05 mm, the length is 3.20mm +/-0.10 mm, a hexagonal nut 1-5 is connected above the round table 1-4, the length is 10.20mm +/-0.10 mm, an M27 multiplied by 1.5 external thread 1-6 is connected above the nut 1-5, the length is 10.15mm +/-0.10 mm, an opening is formed inside the machining shell and is divided into three sections according to the aperture size, the aperture of the bottom is extended from the temperature sensing part 1-1 to the hexagonal nut 1-5, the diameter is phi 7.20mm +/-0.05 mm, the length is 41.00mm +/-0.10 mm, the aperture of the middle part is positioned in the external thread 1-6 connected above the hexagonal nut 1-5, the diameter is 19.00mm +/-0.05 mm, the length is 3.80mm +/-0.10 mm, the diameter of the upper aperture is within the external thread 1-6 near the opening of the shell 1, the diameter is 22.35mm plus or minus 0.05mm, and the length is 6.35mm plus or minus 0.10 mm.
As shown in fig. 3, the plastic component 7 is formed by injection molding through a mold, and the plastic component 7 is composed of four parts, namely a plastic base 7-3, three terminals 7-1 for signal transmission, one terminal 7-2 for grounding, and a copper screw cap 7-4 for fastening with a control end of the compressor. The plastic base 7-3 is made of PA66 plastic, the upper end of the plastic component 7 is connected with a compressor controller, the lower end of the plastic component 7 is connected with a temperature detection and signal transmission component, and the lower end of the plastic component 7 is also provided with a round table for mounting an O-shaped sealing ring. The terminals 7-1 and 7-2 are copper nickel-plated plates or copper zinc-plated plates with the thickness of 0.80mm +/-0.05 mm, the terminals 7-1 and 7-2 are vertically erected on the plastic base 7-3 and are opposite in pairs to form a symmetrical right cross, the plastic base 7-3 is marked with signal terminals 7-1 which are respectively 1, 2 and 3, wherein the 1 and the 2 are opposite, the 3 is opposite to the grounding terminal 7-2, the signal terminal 7-1 is U-shaped at the upper end of the plastic base 7-3, the length is 10.00mm +/-0.10 mm, the grounding terminal 7-2 is flat at the upper end of the plastic base 7-3, the tail end of the grounding terminal is provided with a trapezoidal chamfer, and the length is 12.00mm +/-0.10 mm. The signal terminal 7-1 and the grounding terminal 7-3 are both flat at the lower end of the plastic base 7-3, the length is 4.00mm +/-0.10 mm, and the terminals 7-1 and 7-2 at the upper end and the lower end of the plastic base 7-3 both comprise holes with the diameter of 1.20 mm-1.50 mm. The fastening copper screw cap 7-4 is embedded in the plastic component, the specification is M5 multiplied by 5.0mm, the upper end of the plastic component is 7-3 opened, and the opening is positioned at the midpoint of the 4 terminals 7-1 and 7-2.
In the detailed embodiment, the thermistor 2 and the wire 4 are welded by resistance welding, the thermistor 2 is a high-precision thermistor, the temperature deviation is +/-0.2 ℃ at 0-70 ℃, the wire 4 is a PE wire capable of resisting 150 ℃, one side pin and a corresponding welding point of the thermistor 2 are penetrated by a polyvinylidene fluoride heat-shrinkable sleeve 3, the joint of the thermistor 2 and the wire 4 is wrapped by an encapsulating epoxy resin 5, the other end of the wire 4 is connected with a signal metal end of a plastic component 7, 1 and 2 in 7-1 by using soldering tin, the lower end of the plastic base 7-3 is sleeved with an O-shaped sealing ring 8 which is nitrile rubber, a machining shell 1 is filled with a high-heat-conductivity epoxy resin 6, the thermistor 2, the wire 4 and the machining shell 1 are inserted, the sealing ring of the plastic component 7 is flush with the opening of the shell 1, a plastic nut 9 is assembled on an external thread 1-6 of the shell 1, the plastic component 7 is pressed with the shell 1, and the shell is placed at normal temperature for 24H to completely cure the epoxy resin 6 in the shell 1.
According to the temperature sensor, the other O-shaped sealing ring is arranged in the sealing ring groove of 1-3, the temperature sensing part 1-1 of the shell 1 is inserted into the main pipeline at the exhaust end of the centrifugal compressor, the thread part 1-2 of the shell 1 is screwed into the thread hole of the main pipeline, the signal line of the compressor controller is in butt joint with the sensor plastic component 7, a nut is assembled in a locking nut 7-4 after butt joint, the sensor and the controller are contracted, the temperature sensor can accurately and reliably detect the temperature of the exhaust end of the centrifugal compressor, the compressor is fully protected, and the energy efficiency output of the compressor is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (10)
1. A temperature sensing device for centrifugal compressor discharge comprising:
a housing; a thermistor, said thermistor disposed within said housing;
one side of the pin of the thermistor is sleeved with the heat-shrinkable sleeve;
the thermistor is connected with one end of the wire, and the joint of the wire is wrapped and encapsulated with epoxy resin; and the other end of the electric wire is connected with the plastic component, and the heat-shrinkable sleeve, the electric wire and the plastic component are all positioned in the shell and filled with another epoxy resin.
2. The centrifugal compressor temperature sensing device for exhaust gas of claim 1, wherein the plastic assembly comprises three signal terminals, a ground terminal, a plastic base and a copper screw cap, wherein the signal terminals are connected to the wires, the signal terminals and the ground terminal are symmetrically and vertically erected on the plastic base, and the copper screw cap is embedded in an upper opening of the plastic base.
3. The temperature sensing device for exhaust gas of a centrifugal compressor according to claim 2, wherein the housing includes a temperature sensing portion, a sealing ring groove, a circular table, a hexagon nut, and two external threads, wherein one of the external threads is connected to the temperature sensing portion, the sealing ring groove is connected to the external thread, the circular table is connected to the sealing ring groove, the hexagon nut is connected to the circular table, and the other external thread is connected to the hexagon nut.
4. The temperature sensor for centrifugal compressor discharge air according to claim 3, wherein the temperature sensing portion has an outer diameter of 9.50mm, a length of 13.50mm, and a wall thickness of 1.15 mm.
5. The centrifugal compressor discharge temperature sensing device according to claim 3, wherein the seal ring groove has a length in a range of 2.40mm ± 0.10 mm.
6. The centrifugal compressor discharge temperature sensing device according to claim 3, wherein said truncated cone has a diameter in the range of 25.40mm ± 0.05mm and a length in the range of 3.20mm ± 0.10 mm.
7. The centrifugal compressor discharge temperature sensing device according to claim 3, wherein the hexagonal nut has a diameter in the range of 7.20mm + 0.05mm and a length in the range of 41.00mm + 0.10 mm.
8. The centrifugal compressor discharge temperature sensing device according to claim 3, wherein the lengths of the two external threads are respectively 14.00mm ± 0.10mm and 19.00mm ± 0.05 mm.
9. The centrifugal compressor discharge temperature sensing device according to any one of claims 1 to 8, wherein said thermistor and said electric wire are welded by resistance welding, and said heat-shrinkable sleeve is a polyvinylidene fluoride sleeve.
10. The centrifugal compressor temperature sensing device for exhaust gas according to any one of claims 2 to 8, wherein a sealing ring is sleeved at the lower end of the plastic base, and the sealing ring is made of nitrile rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920879322.6U CN210603639U (en) | 2019-06-12 | 2019-06-12 | Temperature sensing device for exhaust of centrifugal compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920879322.6U CN210603639U (en) | 2019-06-12 | 2019-06-12 | Temperature sensing device for exhaust of centrifugal compressor |
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| CN210603639U true CN210603639U (en) | 2020-05-22 |
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| CN201920879322.6U Active CN210603639U (en) | 2019-06-12 | 2019-06-12 | Temperature sensing device for exhaust of centrifugal compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928967A (en) * | 2020-07-27 | 2020-11-13 | 北京航空航天大学 | Inside temperature measuring device of alkali metal air chamber |
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2019
- 2019-06-12 CN CN201920879322.6U patent/CN210603639U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928967A (en) * | 2020-07-27 | 2020-11-13 | 北京航空航天大学 | Inside temperature measuring device of alkali metal air chamber |
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