1. A linear vibrator, comprising:
a cover;
a base forming a housing together with the cover, the base defining a bottom wall and a plurality of sidewalls;
a plurality of elastic members received in the housing, each of the elastic members including a fastening portion connecting to the housing, an elastic arm extending from the fastening portion, and a mounting portion extending from the elastic arm, the elastic arm being deformable parallel to the bottom wall;
a weight suspended in the housing by the elastic members and defining a through hole therein;
a magnet assembly accommodated in the through hole of the weight, one half of the magnet assembly having magnetic poles opposite to those of the other half, and planes of magnetic poles of the magnet assembly being parallel and facing to the bottom wall of the base; and
a coil positioned on the bottom wall and located below the magnet.
2. The linear vibrator as described in claim 1, wherein the fastening portion of the elastic member includes a first fastening part connecting to one sidewall of the base and a second fastening part connecting to another adjacent sidewall.
3. The linear vibrator as described in claim 1, wherein the mounting portion of the elastic member includes an upper part, a lower part opposed from the upper part, and a slot between the upper part and the lower part.
4. The linear vibrator as described in claim 3, wherein the weight defines a positioning portion at least partially received in the slot and sandwiched between the upper part and the lower part.
5. The linear vibrator as described in claim 1, wherein, the weight is made from materials having specific gravities higher than 7.8 gcm3.
6. A linear vibrator, comprising:
a housing including a cover and a base, the base defining a bottom wall and a plurality of sidewalls vertically extending from the bottom wall;
a plurality of elastic members connected to the housing, each of the elastic members including an elastic arm being deformable parallel to the bottom wall;
a vibrating unit suspended by the elastic members, the vibrating unit comprising a magnet assembly, one half of the magnet assembly having magnetic poles opposite to those of the other half, and planes of magnetic poles of the magnet assembly being parallel and facing to the bottom wall of the base; and
a coil positioned on the bottom wall and located below the magnet.
7. The linear vibrator as described in claim 6, wherein the elastic member further including a fastening portion having a first fastening part connecting to one sidewall of the base and a second fastening part connecting to another adjacent sidewall.
8. The linear vibrator as described in claim 7, wherein the elastic member further defines a mounting portion extending from the elastic arm, the mounting portion including an upper part, a lower part opposed from the upper part, and a slot between the upper part and the lower part.
9. The linear vibrator as described in claim 8, wherein the weight defines a positioning portion at least partially received in the slot and sandwiched between the upper part and the lower part.
10. The linear vibrator as described in claim 6 further comprising a weight which is made from materials having specific gravities higher than 7.8 gcm3.
11. A linear vibrator, comprising:
a housing including a base and a cover, the base having a bottom wall and a plurality of sidewalls extending vertically from the bottom wall;
a plurality of elastic members connected to the housing;
a vibrating unit suspended in the housing by the elastic members, the vibrating unit having a magnet assembly and vibrating along a direction parallel to the bottom wall;
a coil positioned on the bottom wall and facing the magnet assembly.
12. The linear vibrator as described in claim 11 further comprising a weight surrounding the magnet assembly, the weight being made from materials having specific gravities higher than 7.8 gcm3.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A process system, comprising:
a first heat transfer system for combusting of a fuel and for heating of a process fluid, wherein said heat transfer system comprises:
A fuel tube having a length and a tube wall that define a fuel introduction zone wherein along said length and within said fuel introduction zone is included a fuel preheating zone and a combustion zone, wherein said fuel preheating zone includes a fuel inlet for introducing said fuel into said fuel preheating zone and a fuel outlet for introducing a preheated fuel from said fuel preheating zone into said combustion zone, and wherein along said combustion zone and through said tube wall is a plurality of apertures;
an oxidant tube that is external to and surrounding said fuel tube so as to thereby define an oxidant introduction zone along said length of said fuel tube, wherein said oxidant introduction zone includes an oxidant preheating zone and a fuel combustion zone, wherein said oxidant preheating zone includes an oxidant inlet for introducing an oxidant into said oxidant preheating zone and an oxidant outlet for introducing a preheated oxidant from said oxidant preheating zone into said fuel combustion zone, and wherein said plurality of apertures provide for fluid communication between said combustion zone and said fuel combustion zone; and
a process tube that is external to and surrounding said oxidant tube so as to thereby define a process fluid introduction zone along said oxidant tube, wherein said process fluid introduction zone includes a process fluid heating zone and an oxidantfuel heating zone, wherein said process fluid heating zone is in heat exchange relationship with said fuel combustion zone and includes a process fluid inlet for introducing said process fluid into said process fluid heating zone and a process fluid outlet for introducing a heated process fluid from said process fluid heating zone into said oxidantfuel heating zone, and wherein said oxidantfuel heating zone is in heat exchange relationship with both of said oxidant preheating zone and said fuel preheating zone and includes a discharge outlet for discharging from said oxidantfuel heating zone said heated process fluid.
2. A process system as recited in claim 1, wherein said apertures of said plurality of apertures are spaced along said combustion zone of said length of said fuel tube and are sized so as to provide for the introduction of increments of said preheated fuel into said fuel combustion zone such that when said increments of said preheated fuel are mixed with said preheated oxidant a combustion mixture is formed and a combustion occurs which releases heat without a flame.
3. A process system as recited in claim 2, wherein the heat exchange relationship between said process fluid heating zone and said fuel combustion zone provides for the heating of said process fluid to yield said heated process fluid by the heat released by said combustion.
4. A process system as recited in claim 3, wherein the heat exchange relationship between said oxidantfuel heating zone and both of said oxidant preheating zone and said fuel preheating zone provides for the heating of said fuel to yield said preheated fuel and for the heating of said oxidant to yield said preheated oxidant by the transfer of heat from said heated process fluid.
5. A process system as recited in claim 4, wherein the heat exchange relationship between said oxidantfuel heating zone and both of said oxidant preheating zone and said fuel preheating zone further provides for a preheated oxidant temperature of said preheated oxidant and a preheated fuel temperature of said preheated fuel such that said combustion mixture has a combustion mixture temperature exceeding the auto-ignition temperature of said combustion mixture.
6. A process system as recited in claim 5, wherein said fuel introduction zone is further characterized by a fuel introduction geometry, wherein said oxidant introduction zone is further characterized by an oxidant introduction zone geometry, wherein said fuel introduction geometry and said oxidant introduction zone geometry are such as to provide for a preheated fuel velocity and a preheated oxidant velocity that prevent the formation of said flame.
7. A process system as recited in claim 6, further comprising:
first reactor means for contacting under reaction conditions said heated process fluid with a catalyst, wherein said first reactor means includes a first reactor inlet for receiving said heated process fluid as a first reactor feed and a first reactor outlet for discharging a first reactor effluent, wherein said reactor inlet is fluidly connected to said discharge outlet.
8. A process for the direct heating of a process fluid by the flameless combustion of a fuel, said process comprises:
introducing said fuel into a fuel tube having a length and a tube wall that define a fuel introduction zone wherein along said length and within said fuel introduction zone is included a fuel preheating zone and a combustion zone, wherein said fuel preheating zone includes a fuel inlet for introducing said fuel into said fuel preheating zone and a fuel outlet for introducing a preheated fuel from said fuel preheating zone into said combustion zone, and wherein along said combustion zone and through said tube wall is a plurality of apertures;
introducing an oxidant into an oxidant tube that is external to and surrounding said fuel tube so as to thereby provide an oxidant introduction zone along said length of said fuel tube, wherein said oxidant introduction zone includes an oxidant preheating zone and a fuel combustion zone, wherein said oxidant preheating zone includes an oxidant inlet for introducing said oxidant into said oxidant preheating zone and an oxidant outlet for introducing a preheated oxidant from said oxidant preheating zone into said fuel combustion zone, and wherein said plurality of apertures provide for fluid communication between said combustion zone and said fuel combustion zone;
introducing said process fluid into a process tube that is external to and surrounding said oxidant tube so as to thereby provide a process fluid introduction zone along said oxidant tube, wherein said process fluid introduction zone includes a process fluid heating zone and an oxidantfuel heating zone, wherein said process fluid heating zone is in heat exchange relationship with said fuel combustion zone and includes a process fluid inlet for introducing said process fluid into said process fluid heating zone and a process fluid outlet for introducing a heated process fluid from said process fluid heating zone into said oxidantfuel heating zone, and wherein said oxidantfuel heating zone is in heat exchange relationship with both of said oxidant preheating zone and said fuel preheating zone and includes a discharge outlet for discharging from said oxidantfuel heating zone said heated process fluid;
discharging from said oxidantfuel heating zone said heated process fluid; and
discharging from said fuel combustion zone a combustion exhaust.
9. A process as recited in claim 8, further comprising:
introducing increments of said preheated fuel into said fuel combustion zone such that a combustion mixture is formed and a combustion occurs which releases heat without a flame.