CN-122014556-A - Screw rod linear compressor

CN122014556ACN 122014556 ACN122014556 ACN 122014556ACN-122014556-A

Abstract

The invention relates to the technical field of compressors, in particular to a screw rod linear compressor which comprises a screw rod motor, a motor shell, a piston rod, a connecting barrel, a cooling fan, an air passage pipe, a cylinder body, a water jacket and a cylinder cover. According to the invention, the piston rod is directly connected with the screw motor, the piston rod is driven to reciprocate by utilizing the linear motion output by the screw motor to compress gas, the piston head in the cylinder body is used for constructing the primary compression chamber and the secondary compression chamber, the primary exhaust valve and the secondary intake valve are communicated with the gas path around the primary compression chamber and the secondary compression chamber in the cylinder cover and the base of the cylinder body, so that the two-way acting secondary gas compression of the piston rod is realized, the mechanical efficiency is improved on the basis of simplifying the mechanical structure of the piston compressor, the maintenance is convenient, the two-way acting piston rod can realize the two-way gas compression in one reciprocation process, the friction loss is reduced, and the stable and safe operation of the piston compressor can be ensured.

Inventors

WEI KAI
Hou Jiyao
ZHANG YANHU
GAO LEI
WANG YONGTAO
JIANG XIAOFEI

Assignees

天德(威海)工业装备股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. The screw rod linear compressor is characterized by comprising a reciprocating motor, a piston rod, a cylinder body and a cylinder cover; The output end of the reciprocating motor is connected with one end of the piston rod and used for driving the piston rod to reciprocate, and a piston head is arranged at the other end of the piston rod; the cylinder body is of a barrel body structure with an opening at the top end, the bottom end of the cylinder body is provided with a base, a rod hole is formed in the base, one side of a piston head of the piston rod penetrates into the cylinder body through the rod hole of the cylinder body base, and the top end of the cylinder body is provided with a cylinder cover; The upper end face of the piston head, the inner wall of the cylinder body and the cylinder cover form a sealed primary compression chamber, a primary air inlet valve and a primary air outlet valve are respectively arranged on the annular direction of the cylinder cover, and the primary air inlet valve and the primary air outlet valve are communicated with the primary compression chamber through an air passage in the cylinder cover; the lower end face of the piston head, the inner wall of the cylinder body, the inner surface of the base of the cylinder body and the outer wall of the piston rod form a closed secondary compression chamber, a secondary air inlet valve and a secondary air outlet valve are respectively arranged on the annular direction of the base of the cylinder body, and are communicated with the secondary compression chamber through an air passage in the base of the cylinder body; the primary exhaust valve is communicated with the secondary air inlet valve through an external air passage pipe.
2. The screw linear compressor of claim 1, wherein the piston head is provided with a front gas sealing ring and a front guide ring in a circumferential direction thereof, and the piston head is closely attached to an inner wall of the cylinder block through the front gas sealing ring and the front guide ring.
3. The screw rod linear compressor according to claim 1, wherein a rear gas sealing ring and a rear guide ring are provided on an inner wall of a rod hole of the cylinder block base, and the cylinder block base is closely attached to an outer wall of the piston rod through the rear gas sealing ring and the rear guide ring.
4. The screw rod linear compressor according to claim 1, wherein the cylinder cover is sleeved on the top end of the cylinder body, an end face sealing ring is arranged on the end face of the top end of the cylinder body, a circumferential sealing ring is arranged on the top end of the cylinder body in a circumferential direction, and the inner wall of the cylinder cover is tightly attached to the end face sealing ring and the circumferential sealing ring.
5. The screw rod linear compressor according to claim 1, wherein an annular groove is further formed in the outer side of the cylinder body, a first sealing ring and a second sealing ring are respectively arranged at two ends of the annular groove on the cylinder body, a water jacket is sleeved on the outer side of the cylinder body, the inner wall of the water jacket is tightly attached to the first sealing ring and the second sealing ring, a closed cooling water cavity is formed between the inner wall of the water jacket and the outer wall of the cylinder body, and a water inlet and a water outlet are formed in the water jacket.
6. The screw linear compressor of claim 5, wherein a heat dissipation chamber is provided inside the cylinder block base, the heat dissipation chamber is communicated with the cooling water inner chamber, and a water outlet is further provided outside the cylinder block base, and the water outlet is communicated with the heat dissipation chamber.
7. The screw linear compressor of claim 1, further comprising a connecting barrel; The connecting barrel is sleeved on the outer side of the piston rod, one end of the connecting barrel is rigidly connected with the reciprocating motor, and the other end of the connecting barrel is rigidly connected with the bottom surface of the cylinder body base.
8. The screw linear compressor of claim 1, wherein a motor housing is further sleeved outside the reciprocating motor, and a heat dissipation air hole is formed in the motor housing.
9. The screw linear compressor of claim 8, wherein a bottom end of the motor housing is provided with a cooling fan.
10. The screw linear compressor of claim 1, wherein the reciprocating motor comprises a screw motor and a linear motor.

Description

Screw rod linear compressor Technical Field The invention relates to the technical field of compressors, in particular to a screw rod linear compressor. Background The piston compressor is a compressor which makes gas pressurized and delivered by means of reciprocating motion of piston, and belongs to a volume type compressor, and is also called reciprocating piston compressor, and is mainly formed from air cavity, driving component, machine body and auxiliary component, and the air cavity is directly used for compressing gas, and is formed from air cylinder, cylinder sleeve, air valve, packing, piston and piston rod, and the piston is driven by piston rod to make reciprocating motion in the air cylinder, and the volume of air cavity on two sides of piston is alternatively changed, and the gas on one side of volume reduction is discharged by means of air valve due to pressure increase, and the gas on one side of volume increase is sucked by means of air valve due to air pressure reduction, and the driving component is used for implementing reciprocating motion, and has crankshaft connecting rod, eccentric slide block and sloping cam plate, etc. The crank-connecting rod mechanism type piston compressor at present is characterized in that a motor directly drives the compressor to enable a crankshaft to generate rotary motion, a connecting rod is driven to enable a piston to generate reciprocating motion to cause cylinder volume change, and the crank-connecting rod mechanism is large in friction loss and noise and low in transmission efficiency due to the fact that a plurality of kinematic pairs and parts are arranged, meanwhile, most of multistage compressors are designed in a split cylinder mode, low-stage compression and high-stage compression are respectively completed in a plurality of independent cylinders, pistons and the like are needed, so that the compressor is more in parts, more complex in structure, larger in size and difficult to maintain. Disclosure of Invention Therefore, the invention provides a screw rod linear compressor which is used for solving the problem of difficult maintenance caused by more complex structure of the existing piston compressor. In order to achieve the above object, the present invention provides a screw rod linear compressor, comprising a reciprocating motor, a piston rod, a cylinder block and a cylinder cover; the output end of the reciprocating motor is connected with one end of the piston rod and used for driving the piston rod to reciprocate, and the other end of the piston rod is provided with a piston head; the cylinder body is of a barrel body structure with an opening at the top end, the bottom end of the cylinder body is provided with a base, a rod hole is formed in the base, one side of a piston head of the piston rod penetrates into the cylinder body through the rod hole of the base of the cylinder body, and the top end of the cylinder body is provided with a cylinder cover; the upper end face of the piston head, the inner wall of the cylinder body and the cylinder cover form a sealed primary compression chamber, a primary air inlet valve and a primary air outlet valve are respectively arranged on the annular direction of the cylinder cover, and the primary air inlet valve and the primary air outlet valve are communicated with the primary compression chamber through an air passage in the cylinder cover; The lower end face of the piston head, the inner wall of the cylinder body, the inner surface of the base of the cylinder body and the outer wall of the piston rod form a closed secondary compression chamber, a secondary air inlet valve and a secondary air outlet valve are respectively arranged on the annular direction of the base of the cylinder body, and are communicated with the secondary compression chamber through an air passage in the base of the cylinder body; the first-stage exhaust valve is communicated with the second-stage intake valve through an external gas path pipe. Further, a front gas sealing ring and a front guide ring are arranged on the ring of the piston head, and the piston head is tightly attached to the inner wall of the cylinder body through the front gas sealing ring and the front guide ring. Further, a rear gas sealing ring and a rear guide ring are arranged on the inner wall of the rod hole of the cylinder body base, and the cylinder body base is tightly attached to the outer wall of the piston rod through the rear gas sealing ring and the rear guide ring. Further, the cylinder cover is sleeved on the top end of the cylinder body, the end face of the top end of the cylinder body is provided with an end face sealing ring, the annular direction of the top end of the cylinder body is provided with an annular sealing ring, and the inner wall of the cylinder cover is tightly attached to the end face sealing ring and the annular sealing ring. Further, the cylinder body outside is also provided with the annular, and the cylinder body is pr