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Piston assembly for an unloader valve of an air compressor

A technology of air compressor and piston assembly, which is applied to the parts of the pumping device for elastic fluid, the arrangement of the pump/compressor, the machine/engine, etc., and can solve the problem of premature wear of the balance piston, compressor stuck, compressor overheating etc.

Active Publication Date: 2021-11-26
KNORR BREMSE SYST FUER NUTZFAHRZEUGE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantageously, in such systems, especially premature wear of the balancing pistons as well as overheating of the compressor and seizure of the compressor can occur

Method used

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  • Piston assembly for an unloader valve of an air compressor
  • Piston assembly for an unloader valve of an air compressor
  • Piston assembly for an unloader valve of an air compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] see figure 1 , the air compressor 2 includes a cylinder head assembly 4 arranged on a compressor crankcase assembly 6 in known manner. Components of crankcase assembly 6 and cylinder head assembly 4 cooperate to generate compressed air.

[0041] Cylinder head assembly 4 includes an air intake 8 through which air may be received for compression within crankcase assembly 6 and cylinder head assembly 4 . The cylinder head assembly 4 comprises an outlet opening 10 , ie an exhaust opening, through which compressed air can be delivered from the cylinder head assembly 4 . Provided with a pair of coolant ports 12 ( figure 1 Only one cooling port 12 is shown in , through which coolant can cool the cylinder head assembly 4 when compressed air is generated. The cylinder head assembly 4 also includes a relief valve port 14 and a regulator port (not shown) connectable to a regulator (also not shown) via a pneumatic control line (not shown).

[0042] Compressor 2 also includes an...

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PUM

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Abstract

The application relates to a piston assembly (26) for an unloader valve (16) of an air compressor (2), comprising an unloader piston (28) having an end portion with a first bore (36) of a first bore diameter, an intermediate portion with a second bore (40) of a second bore diameter and an opposite end portion with a third bore (44) of a third bore diameter; a coil spring (30) having a central opening (52), one end portion disposed in the second bore (40) of the unloader piston (28) and an opposite end portion extending into the first bore (36) of the unloader piston (28); and a balance piston (32) including a head portion (48) having a diameter to be disposed in the first bore (36) of the unloader piston (28), and a stem portion (50) extending from the head portion (48) into the central opening (52) of the coil spring (30) and having a diameter smaller than the diameter of the head portion (48); wherein the diameter of the stem portion (50) at an end portion (82) facing away from the head portion (48) substantially corresponds to an inner diameter of the central opening (52) of the coil spring (30); and the balance piston (32) includes a heat protection means (82; 84; 86; 88; 92). Further the application relates to an unloader valve assembly (16) for an air compressor (2), comprising a piston assembly (26) according to the invention; and a vehicle air compressor (2) for a heavy vehicle braking system, comprising a compressor crankcase assembly (6); a compressor cylinder head assembly (4) and an unloader valve assembly (16) according to the invention.

Description

technical field [0001] The present application relates to a piston assembly for an unloader valve of an air compressor, the piston assembly comprising: an unloader piston having an end having a first bore having a first bore, a bore having a second bore The intermediate portion of the second hole and the opposite end portion including a third hole having a third hole diameter, wherein the first hole diameter is larger than the second hole diameter, and the second hole diameter is larger than the third hole diameter; a coil spring having a central opening, arranged One end in the second bore of the unloader piston and the opposite end extending into the first bore of the unloader piston; and a balance piston comprising a head and a stem, the head having a The diameter in the first hole, the shank of which extends from the head into the central opening of the coil spring and the diameter of the shank is smaller than the diameter of the head. The present application also relates...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T17/02F04B49/03F04B53/10
CPCB60T17/02F04B49/03F04B53/10F04B39/06
Inventor J·迈拉尔J-B·马雷斯科B·希罗A·沙泽勒J-L·梅扎
Owner KNORR BREMSE SYST FUER NUTZFAHRZEUGE GMBH
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